JP7801792B2 - Systems and programs - Google Patents

Description

Article 30, paragraph 2 of the Patent Act applies. Publication address: https://www.yupiteru.co.jp/products/radar/ls300/ https://www.yupiteru.co.jp/products/radar/ls300/function.html https://www.yupiteru.co.jp/products/radar/ls300/spec.html https://www.yupiteru.co.jp/products/radar/ls300/option. html https://www. yupiteru. co. jp/products/radar/ls300/support. html https://my. yupiteru. co. jp/upload/save_image/manual/pdf/LS300. pdf https://www. yupiteru. co. jp/products/radar/gs103/ https://www. yupiteru. co. jp/products/radar/gs103/function. html https://www. yupiteru. co. jp/products/radar/gs103/spec. html https://www. yupiteru. co. jp/products/radar/gs103/option. html https://www. yupiteru. co. jp/products/radar/gs103/support. html https://my. yupiteru. co. jp/upload/save_image/manual/pdf/GS103. pdf https://www. yupiteru. co. jp/products/radar/a350alpha/ https://www. yupiteru. co. jp/products/radar/a350alpha/function. html https://www. yupiteru. co. jp/products/radar/a350alpha/spec. html https://www. yupiteru. co. jp/products/radar/a350alpha/option. html

Article 30, Paragraph 2 of the Patent Act applies https://www. yupiteru. co. jp/products/radar/a350alpha/support. html https://my. yupiteru. co. jp/upload/save_image/manual/pdf/A350Alpha. pdf https://www. yupiteru. co. jp/products/radar/wr70/ https://www. yupiteru. co. jp/products/radar/wr70/function. html https://www. yupiteru. co. jp/products/radar/wr70/spec. html https://www. yupiteru. co. jp/products/radar/wr70/option. html https://www. yupiteru. co. jp/products/radar/wr70/support. html https://my. yupiteru. co. jp/upload/save_image/manual/pdf/WR70. pdf http://driver-box.yaesu-net.co.jp/new-article/15326/ (Published March 15, 2019)

Article 30, paragraph 2 of the Patent Act applies. Publication addresses: https://www.yupiteru.co.jp/products/radar/z100l/ https://www.yupiteru.co.jp/products/radar/z100l/function.html https://www.yupiteru.co.jp/products/radar/z100l/spec.html https://www.yupiteru.co.jp/products/radar/z100l/option. html https://www.yupiteru.co.jp/products/radar/z100l/support.html https://my.yupiteru.co.jp/upload/save_image/manual/pdf/Z100L.pdf (Published on March 29, 2019) Published on March 15, 2019 in Car Goods Magazine, May 2019 issue, page 25, by Sanei Shobo Published on March 18, 2019 in Car Goods Press vol. 88, page 35, published by Tokuma Shoten Published on March 20, 2019 Driver May 2019 issue, page 7, published by Yaesu Publishing Published on March 26, 2019 Best Car April 26, 2019 issue, pages 150-151, published by Kodansha

The present invention relates to systems, programs, etc.

There are various types of systems for measuring the speed of vehicles traveling on roads. In the case of radar systems, speed measurement devices installed along the road emit microwaves in a specific frequency band toward vehicles, receive the reflected waves from the vehicles, and measure the vehicle's traveling speed.

It can be useful for vehicle drivers and other users to be aware of the presence of a speed measurement device in advance. Patent Documents 1 and 2 disclose electronic devices that receive microwaves emitted from a vehicle speed measurement device and output an alarm if the presence of a vehicle speed measurement device is detected.

JP 2008-64588 A JP 2017-96728 A

The moving speed of an object can also be measured using light. With this optical method, a light-emitting device emits light toward the object and receives the reflected light from the object to measure its moving speed. Even when such an optical speed measurement device is installed, it is desirable to be able to notify the user of its presence. One of the objects of the present invention is to provide technology for notifying the user of the presence of a light-emitting device that emits light of a specific wavelength.

The purpose of the invention of this application is not limited to this, and the applicant intends to obtain rights for configurations that aim to achieve the effects achieved by parts of the configuration disclosed in this specification and drawings, etc., through divisional applications, amendments, etc. For example, this specification discloses problems in which the phrase "can be" is read as "the problem is...". Each problem is described as an independent problem, and the applicant intends to obtain rights for configurations that solve each problem separately through divisional applications, amendments, etc. Even if the problem is implicitly understood from the description in the specification, the applicant intends to include part of the configuration described in this specification within the scope of the patent claim through amendments or divisional applications. Furthermore, configurations that solve problems that combine these independent problems have also been disclosed, and the applicant intends to obtain rights for them.

(1) A system that is installed in a vehicle and that notifies the presence of a device that detects the presence of the vehicle by emitting light of a specific wavelength, the system comprising: a condenser lens including an incident surface having an aspherical curved surface and an exit surface from which light incident on the incident surface exits; and a light-receiving element that receives the light exiting from the exit surface.
and a control unit that performs control to notify the presence of the light emitting device based on the light of the specific wavelength received by the light receiving element.

This provides a technology for notifying the user of the presence of a light-emitting device that emits light of a specific wavelength. In particular, by using a focusing lens with an aspherical curved entrance surface, the light-receiving element can receive light arriving from a wide range in a specified direction, more reliably notifying the user of the presence of a light-emitting device.

The light-emitting device may be a device that emits light whose energy is distributed over a wavelength range narrower than that of ambient light. The ambient light may be light other than the target light to be received. The specific wavelength may be the wavelength at which the energy of the light emitted by the light-emitting device peaks. The specific wavelength may be a wavelength that is not perceptible to humans, for example, a wavelength that has energy at a specific wavelength outside the visible light range. The specific wavelength may be, for example, 905 nm, belonging to the infrared light range. The specific wavelength is not limited to this and may be 850, 950 nm, 1900 nm, or other wavelengths. The wavelength different from the specific wavelength may be a wavelength different from the wavelength at which the energy of the light emitted by the light-emitting device peaks. The wavelength different from the specific wavelength may be a wavelength included in the visible light range. The amount of received light may indicate the amount of light of a specific wavelength selected and received by the light-receiving unit. Selecting a wavelength may mean selecting some wavelengths from a certain wavelength range and excluding at least some other wavelengths. Notification control can be defined as control that notifies information in a manner that can be recognized by the user.

(2) The incident surface may include a convex curved surface extending along the width direction of the vehicle.

This allows the light-receiving element to receive light from a wide range across the width of the vehicle, more reliably alerting the driver to the presence of the light-emitting device.

(3) The length of the incident surface in the width direction of the vehicle may be greater than the length in the height direction of the vehicle.

This allows the light-receiving element to receive light from a wide range across the width of the vehicle, more reliably alerting the driver to the presence of the light-emitting device.

(4) The incident surface may include a convex curved surface along both the width direction and the height direction of the vehicle.

This allows the light-receiving element to receive light coming from a wide range of directions, more reliably alerting the user to the presence of a light-emitting device.

(5) The incident surface may include a convex curved surface along the width direction of the vehicle and a flat curved surface along the height direction of the vehicle.

This allows the light-receiving element to receive light from a wide range across the width of the vehicle, more reliably alerting the driver to the presence of the light-emitting device.

(6) The emission surface may include a flat surface.

This allows the light-receiving element to receive light from a wide range across the width of the vehicle, more reliably alerting the driver to the presence of the light-emitting device.

(7) The light receiving element may be positioned closer to the focusing lens than the focal length position of the focusing lens.

By doing this, the light receiving element can be positioned closer to the focusing lens than the focal length position, allowing light from a wide angle of incidence to be received.

(8) The control unit may be configured to perform control to notify the presence of the device when the pulse width of the light received by the light receiving unit falls within a certain range from a reference pulse width.

Referring to the pulse width of received light can be useful in detecting light-emitting devices that emit specific pulsed light. This can reduce alerts where ambient light is mistaken for light from a light-emitting device.

(9) The control unit may be configured to perform control to notify the presence of the light-emitting device when pulsed light with a pulse width of 20 ms is received.

In this way, it is possible to measure vehicle speeds and alert drivers to the presence of light-emitting devices that are conducting enforcement.

(10) The control unit may be configured to perform control to notify the presence of the device when the pulse interval of the light received by the light receiving unit falls within a certain range from a reference pulse interval.

Referring to the pulse interval of received light can be useful in detecting light-emitting devices that emit specific pulsed light. This can reduce alerts where ambient light is mistaken for light from a light-emitting device.

(11) The control unit may be configured to perform control to notify the presence of the light-emitting device when pulsed light with a pulse interval of 80 ms is received.

In this way, it is possible to measure vehicle speeds and alert drivers to the presence of light-emitting devices that are conducting enforcement.

(12) The control unit may change the level of the notification in accordance with at least one of the pulse width and pulse interval of the light received by the light receiving unit.

This way, users can see how important the content of the notification is.

(13) The control unit may perform control to notify the presence of the light-emitting device when pulsed light of the specific wavelength is received at least once.

This allows the user to immediately become aware of the presence of a fermentation device.

(14) It is preferable that the optical element has a reflecting section that reflects at least a portion of the light emitted from the focusing lens toward the light receiving element.

This increases the amount of light received by the light-receiving element from the light-emitting device, making it possible to more reliably notify the presence of the light-emitting device.

(15) The reflecting portion may be provided at a position different from the optical path from the lens to the light receiving element, and may include a reflecting surface that reflects at least a portion of the light emitted from the lens toward the light receiving element.

This increases the amount of light received by the light-receiving element from the light-emitting device, making it possible to more reliably notify the presence of the light-emitting device.

(16) The reflecting surface may be arranged to surround the optical path.

This increases the amount of light received by the light-receiving element from the light-emitting device, making it possible to more reliably notify the presence of the light-emitting device.

(17) The reflecting section may include a member that is provided on the optical path from the lens to the light receiving element and that reflects at least a portion of the light emitted from the lens toward the light receiving element by utilizing total internal reflection of the light.

This increases the amount of light received by the light-receiving element from the light-emitting device, making it possible to more reliably notify the presence of the light-emitting device.

(18) The device may include an amplifier that amplifies a signal corresponding to the amount of light received from the light-receiving element, and a differential amplifier that outputs a signal corresponding to the difference between the level of the amplified signal and a threshold level, and the control unit may perform control to notify the presence of the light-emitting device based on the signal corresponding to the difference.

This amplifies the amount of light received by the light-receiving element from the light-emitting device, making it possible to more reliably notify the presence of the light-emitting device.

(19) The control unit may perform control to change the threshold level.

This reduces the possibility that control to notify the presence of a light-emitting device will be disabled due to the influence of external light or electromagnetic noise.

(20) The control unit may set the threshold level so that it exceeds at least the level of light emitted by the equipment installed in the vehicle.

This reduces the possibility that control to notify of the presence of a light-emitting device will be disabled due to the influence of light emitted by equipment installed in the vehicle.

(21) The device may have a substrate including a first surface on the collecting lens side and a second surface opposite the first surface, the light receiving element being provided on the second surface side of the substrate, and the substrate may be provided with a light-transmitting portion for guiding light from the first surface side to the light receiving element.

In this way, the substrate is positioned between the light receiving element and the light receiving element lens, making effective use of the space equivalent to the focal length and reducing the overall thickness of the housing.

The present invention may also be specified as follows.
(A) A system is provided that is installed in a vehicle and has a light receiving unit that selects and receives light of a specific wavelength from incident light and outputs a signal corresponding to the amount of light received, and a control unit that performs first notification control to notify of the presence of a light emitting device that emits light of the specific wavelength based on the signal output by the light receiving unit.

In this way, it is possible to provide a technology for notifying users of the presence of a light-emitting device that emits light of a specific wavelength.

The light-emitting device may be a device that emits light whose energy is distributed over a wavelength range narrower than that of ambient light. The ambient light may be light other than the target light to be received. The specific wavelength may be the wavelength at which the energy of the light emitted by the light-emitting device peaks. The specific wavelength may be a wavelength that is not perceptible to humans, for example, a wavelength that has energy at a specific wavelength outside the visible light range. The specific wavelength may be, for example, 905 nm, belonging to the infrared light range. The specific wavelength is not limited to this and may be 850, 950 nm, 1900 nm, or other wavelengths. The wavelength different from the specific wavelength may be a wavelength different from the wavelength at which the energy of the light emitted by the light-emitting device peaks. The wavelength different from the specific wavelength may be a wavelength included in the visible light range. The amount of received light may indicate the amount of light of a specific wavelength selected and received by the light-receiving unit. Selecting a wavelength may mean selecting some wavelengths from a certain wavelength range and excluding at least some other wavelengths. Notification control can be defined as control that notifies information in a manner that can be recognized by the user.

(B) The control unit may be a system that performs the first notification control by displaying an animated image including an image that resembles the light-emitting device.

This makes it easier for users to recognize the presence of a light-emitting device that a vehicle is approaching.

(C) The control unit may be a system that performs the first notification control to display at least one of the attributes of the light-emitting device and the state of the vehicle in addition to the animation image.

In this way, the user can be made aware of at least one of the attributes of the light-emitting device and the vehicle's status.

(D) The control unit may be configured as a system that performs second notification control different from the first notification control when the position of the vehicle has a predetermined relationship with the position of the light-emitting device.

This allows the user to recognize whether they are approaching a light-emitting device that emits light of a specific wavelength received by the system, or a light-emitting device identified based on the vehicle's position.

(E) The system may include a radio wave receiving unit that receives specified radio waves, and the control unit may, upon receiving the specified radio waves, perform third notification control to notify the presence of the radio wave generating device, and may stop the third notification control while the first notification control is being performed.

In this way, when reporting the presence of a light-emitting device with a specific wavelength, it is possible to avoid reporting the presence of a device that emits radio waves.

(F) The control unit may be a system that performs the third notification control by displaying an animated image including an image that resembles the generator.

This makes it easier for users to recognize the presence of a radio wave generating device that their vehicle is approaching.

(G) The control unit may perform fourth notification control in accordance with the relative positions of the vehicle and other vehicles, and the system may perform the fourth notification control in parallel with the first notification control.

There are cases where the priority of reporting information based on the relative positions of the vehicle and other vehicles is high. When the need for such reporting arises, information based on the relative positions of the vehicle and other vehicles can be reported even when the vehicle is approaching the light-emitting device.

(H) The control unit may be a system that stops the first notification control when the vehicle speed is less than a predetermined speed.

This prevents unnecessary notifications from being made when the vehicle's speed is below a specified speed.

(I) When the position of the vehicle satisfies predetermined conditions, the control unit may perform the first notification control even if the vehicle's speed is less than the predetermined speed.

In this way, depending on the vehicle's location, if the presence of a light-emitting device should be reported, this can be reported even if the vehicle's speed is below a predetermined speed.

(K) The control unit may perform a fifth notification control to notify the status of the vehicle occupants based on images from a camera capturing an image of the vehicle's interior, and may stop the fifth notification control while the first notification control is being performed.

In this way, when reporting the presence of a light-emitting device with a specific wavelength, it is possible to avoid reporting the status of the vehicle's occupants.

(L) The system may include a housing having a light-transmitting section that transmits at least the light of the specific wavelength, and the light-receiving section is disposed inside the housing and receives the light of the specific wavelength from the light that enters through the light-transmitting section.

In this way, light of a specific wavelength can be received using the light receiving unit housed within the housing.

(M) The light receiving unit may have a first filter facing the light transmitting unit, a first light receiving element that receives light that has passed through the first filter, a second filter facing the light transmitting unit, and a second light receiving element that receives light that has passed through the second filter, and the housing may have a first window corresponding to the first light receiving element and a second window corresponding to the second light receiving element.

In this way, the presence of a light-emitting device can be notified using a configuration that uses at least two sets of light-receiving elements housed in a housing.

(N) The first light-receiving element and the second light-receiving element may be housed in a shielding case made of a conductive material, and the space housing the first light-receiving element and the space housing the second light-receiving element may be separated by a partition wall.

In this way, the signal output by the light-receiving element is less susceptible to the effects of electromagnetic noise than if it were not shielded with a conductive material.

(O) A system having a first substrate on which a display unit that displays an image, a control circuit that faces the display unit and executes some or all of the functions of the control unit, and a radio wave receiving unit that receives predetermined radio waves are mounted, and a second substrate facing the first substrate on the opposite side of the display unit and on which the light receiving unit and a GNSS (Global Navigation Satellite System) receiving unit that is located adjacent to the light receiving unit are mounted, wherein at least a portion of the radio wave receiving unit is mounted on the side of the first substrate that faces the second substrate, and the second substrate has a cutout in an area where at least a portion of the radio wave receiving unit is located.

This will help prevent the system from becoming too thick.

(P) The control unit controls the output of sound from a speaker, and the speaker is preferably located adjacent to the GNSS receiving unit, and the speaker and the GNSS receiving unit are preferably positioned above the radio wave receiving unit.

This will help prevent the system from becoming too thick.

(Q) The second substrate may have a first region and a second region that is shorter in the vertical direction than the first region and protrudes higher than the first region, and the light receiving unit may be mounted in the first region, and the GNSS receiving unit may be mounted in the second region.

This will help prevent the system from becoming too thick.

(R) A system having a substrate on which the light receiving unit is mounted, an antenna unit that receives predetermined radio waves, and a radio wave receiving unit that has a processing circuit that processes signals from the antenna, wherein the antenna unit is positioned adjacent to the substrate, and the normal direction of the antenna unit intersects with the normal direction of the substrate.

In this way, it is possible to provide technology for notifying users of the presence of a light-emitting device while minimizing changes to existing systems.

(S) The control unit may be a system that, when it recognizes a predetermined reflective material pattern, performs control to notify the presence of a light-emitting device that emits light of the specific wavelength.

This allows the presence of a light-emitting device to be reported in locations where it is likely to be present, reducing the possibility of false alarms.

(T) A program is provided for causing a computer to implement the functions of the control unit of any of the above systems.

In this way, it is possible to provide a technology for notifying users of the presence of a light-emitting device that emits light of a specific wavelength.

The inventions described above in (1) through (20) and (A) through (T) can be combined in any manner. For example, it is desirable to combine all or part of the configuration of the invention described in (1) with at least part of the configuration of at least one of the inventions described in (2) and subsequent items. In particular, it is desirable to combine the invention described in (1) with at least part of the configuration of at least one of the inventions described in (2) and subsequent items. Furthermore, it is also possible to extract any configuration from the inventions described in (1) through (20) and (A) through (T) and combine the extracted configurations. The applicant of this application intends to obtain rights to inventions that include these configurations. Furthermore, even if a description is made of "in the case of..." or "when...," it is not intended to describe a configuration that is limited to that case or time. These are merely examples of better configurations, and the applicant intends to obtain rights to configurations that are not in these cases or times. Furthermore, parts that are described in order are not limited to this order. Configurations in which some parts are deleted or the order is changed are also disclosed, and the applicant intends to obtain rights to them.

This invention makes it possible to notify the user of the presence of a light-emitting device that emits light of a specific wavelength.

The effects of the invention of this application are not limited to these; the effects achieved by the components disclosed in this specification and drawings, etc. are also disclosed, and it is the intention to obtain rights to the components that achieve these effects through divisional applications, amendments, etc. For example, in this specification, statements such as "can..." clearly state the effects that are achieved, and there are also parts that demonstrate the effects even without the statement "can...". Furthermore, there are effects that can be understood from the components even without such statements.

1 is a diagram showing a configuration of an electronic device according to a first embodiment. 3A and 3B are diagrams illustrating an example of a waveform of pulsed light emitted by the speed measurement device according to the first embodiment. FIG. 2 is a rear view of the electronic device according to the first embodiment. 1 is a cross-sectional view of an electronic device according to a first embodiment. 1 is a cross-sectional view of an electronic device according to a first embodiment. 3A and 3B are diagrams illustrating an example of schematic characteristics of a first wavelength selecting section and a second wavelength selecting section according to the first embodiment. 1 is a block diagram showing an electrical configuration of an electronic device according to a first embodiment. 4 is a flowchart showing the operation of the electronic device according to the first embodiment. FIG. 2 is a diagram illustrating an example of a display screen of the electronic device according to the first embodiment. FIG. 2 is a diagram illustrating an example of a display screen of the electronic device according to the first embodiment. FIG. 2 is a diagram illustrating an example of a display screen of the electronic device according to the first embodiment. FIG. 2 is a diagram illustrating an example of a display screen of the electronic device according to the first embodiment. 4 is a flowchart showing the operation of the electronic device according to the first embodiment. FIG. 2 is a diagram illustrating an example of a display screen of the electronic device according to the first embodiment. FIG. 10 is a diagram showing an example of a waveform of pulsed light received by an electronic device according to a modified example of the first embodiment. FIG. 10 is a diagram illustrating an example of a display screen of an electronic device according to a modified example of the first embodiment. 10A and 10B are diagrams illustrating the reason why the number of pulses of pulsed light received by an electronic device according to a modification of the first embodiment decreases. 10 is a flowchart illustrating an operation of an electronic device according to a modified example of the first embodiment. FIG. 10 is a diagram illustrating an overview of a system according to a second embodiment. 10 is a flowchart showing the operation of the electronic device according to the second embodiment. FIG. 11 is a diagram illustrating an example of a display screen of the electronic device according to the second embodiment. FIG. 11 is a block diagram showing the configuration of a system according to a third embodiment. 10A and 10B are diagrams illustrating an example of schematic characteristics of a first wavelength selecting section and a second wavelength selecting section according to the third embodiment. FIG. 11 is a block diagram showing an example of the arrangement of light receiving units in a system according to a third embodiment. FIG. 10 is a diagram illustrating an example of a circuit configuration of a light receiving unit according to a modified example. 1A and 1B are six-view diagrams illustrating an example of an external configuration of an electronic device. FIG. 10 is a diagram showing an example of a notification screen displayed when pulsed light is received from a mobile speed measurement device of an electronic device according to another embodiment. FIG. 10 is a diagram showing an example of an animation image displayed in the information display area TA2. FIG. 29 is a diagram showing an example of an animation image following FIG. 28. FIG. 10 is a diagram showing an example of a notification screen displayed when pulsed light is received from a mobile speed measurement device of an electronic device according to another embodiment. FIG. 10 is a diagram showing an example of an animation image displayed in the information display area TA3. FIG. 32 is a diagram showing an example of an animation image following FIG. 31. FIG. 10 is a diagram showing an example of a notification screen when a micro-type speed measurement device is detected in an electronic device according to another embodiment. FIG. 10 is a diagram showing an example of an animation image displayed in the information display area TA5. FIG. 35 is a diagram showing an example of an animation image following FIG. 34. FIG. 10 is a diagram showing the relationship between received microwaves and notification methods in another embodiment. 10 is a diagram showing the relationship between the detection method and the notification method of a speed measurement device in another embodiment. FIG. FIG. 10 is a diagram showing an example of a notification screen regarding a collision warning in another embodiment. 10A and 10B are diagrams illustrating a warning regarding inattentive driving and drowsy driving in another embodiment. FIG. 10 is a diagram showing an example of a notification screen relating to a warning regarding inattentive driving and drowsy driving in another embodiment. FIG. 10 is a diagram showing an example of a notification screen relating to a warning regarding inattentive driving and drowsy driving in another embodiment. FIG. 10 is a diagram illustrating a GPS warning in another embodiment. 10 is a table illustrating notification control by an electronic device according to another embodiment. FIG. 10 is a diagram showing a notification screen when pulsed light is received from a mobile speed measurement device of an electronic device in another embodiment. FIG. 10 is a diagram showing a notification screen when a radar-based speed measurement device is detected in an electronic device according to another embodiment. 10A and 10B are diagrams illustrating notification timing and a notification method according to another embodiment. 10A and 10B are diagrams illustrating notification timing and a notification method according to another embodiment. 10A and 10B are diagrams illustrating notification timing and a notification method according to another embodiment. FIG. 10 is a perspective view showing an example of an external configuration of an electronic device according to another embodiment. 10A to 10C are six-view diagrams illustrating an example of an external configuration of an electronic device according to another embodiment. 10A to 10C are six-view diagrams illustrating an example of an external configuration of an electronic device according to another embodiment. FIG. 10 is a rear view of an electronic device according to another embodiment with a cover removed. FIG. 10 is an exploded perspective view of an electronic device according to another embodiment. FIG. 10 is a rear view illustrating a state in which the second housing is further removed from the electronic device according to another embodiment. FIG. 10 is a perspective view showing the internal configuration of an electronic device according to another embodiment. FIG. 10 is a perspective view showing the internal configuration of an electronic device according to another embodiment. FIG. 10 is a perspective view showing the internal configuration of an electronic device according to another embodiment. FIG. 10 is a photograph of a second substrate according to another embodiment. FIG. 10 is a diagram illustrating an example of the configuration of a light receiving unit according to another embodiment. FIG. 10 is a diagram illustrating an example of a filter characteristic according to another embodiment. FIG. 1 is a diagram illustrating a configuration of the electronic device when a second substrate is removed; FIG. 10 is a perspective view showing an external configuration of an electronic device as another example according to another embodiment. FIG. 10 is a perspective view showing the external configuration of an electronic device according to another embodiment. FIG. 10 is a perspective view showing the internal configuration of an electronic device according to another embodiment. FIG. 10 is a perspective view showing the internal configuration of an electronic device according to another embodiment. FIG. 10 is a perspective view showing the internal configuration of an electronic device according to another embodiment. 10A and 10B are diagrams illustrating a noise reduction method for an electronic device according to another embodiment. FIG. 10 is a diagram illustrating another embodiment. FIG. 10 is a diagram illustrating another embodiment. FIG. 10 is a diagram illustrating another embodiment. FIG. 10 is a diagram illustrating another embodiment. 1 is a diagram showing the configuration of an electronic device of the present embodiment as viewed from the upper right diagonal direction on the rear side. 1A to 1C are six-view diagrams illustrating an example of an external configuration of an electronic device according to an embodiment of the present invention. FIG. 2 is a diagram illustrating a state in which a second housing is removed from the electronic device of the present embodiment. FIG. 10 is a diagram illustrating a state in which the lens is further removed from the electronic device of the present embodiment. FIG. 10 is a diagram showing a state in which a filter and a shield plate are further removed from the electronic device of the present embodiment. This is a diagram of FIG. 76 with the substrate removed. 1A to 1C are six-view diagrams illustrating an example of the configuration of a lens according to an embodiment of the present invention. 10A and 10B are diagrams illustrating an experiment to confirm that an aspherical lens can receive light with a wide incident angle. FIG. 2 is a diagram illustrating an example of an electrical configuration of a light receiving unit according to the present embodiment. 10A and 10B are diagrams illustrating an example of a configuration in which a reflecting section is applied to the electronic device of the present embodiment. 10A and 10B are diagrams illustrating an example of a configuration in which a reflecting section is applied to the electronic device of the present embodiment. 3A and 3B are diagrams illustrating light received by the electronic device of the present embodiment from a collision warning system. 10 is a graph showing an example of temporal changes in the level of light received by a light receiving section. FIG. 2 is a diagram illustrating an example of an electrical configuration of a light receiving unit according to the present embodiment. FIG. 10 is a diagram illustrating a method for setting a threshold value according to the present embodiment. FIG. 10 is a diagram illustrating an example of a modified electrical configuration of a light receiving unit. 1 is a diagram showing the configuration of an electronic device of the present embodiment as viewed from the upper right diagonal direction on the rear side. 1A to 1C are six-view diagrams illustrating an example of an external configuration of an electronic device according to an embodiment of the present invention. 1A to 1C are six-view diagrams illustrating an example of an external configuration of an electronic device according to an embodiment of the present invention. FIG. 1 is a diagram showing the internal configuration of an electronic device according to an embodiment of the present invention. FIG. 1 is a diagram showing the internal configuration of an electronic device according to an embodiment of the present invention. FIG. 1 is a diagram showing the internal configuration of an electronic device according to an embodiment of the present invention. 1 is a diagram showing the external configuration of an electronic device according to an embodiment of the present invention; 1A to 1C are six-view diagrams illustrating an example of an external configuration of an electronic device according to an embodiment of the present invention. FIG. 2 is a diagram illustrating a state in which a second housing is removed from the electronic device of the present embodiment. FIG. 10 is a diagram illustrating a state in which a condenser lens is further removed from the electronic device of the present embodiment. FIG. 2 is a diagram illustrating a state in which a first housing is removed from the electronic device of the present embodiment. 1 is a diagram showing a state in which the electronic device of the present embodiment is attached to a dashboard using a first attachment member. 3A and 3B are diagrams illustrating the external configuration of a first mounting member according to the present embodiment. 10A to 10C are diagrams illustrating a method for attaching an electronic device using the first attachment member of the present embodiment. 10 is a diagram showing the electronic device of the present embodiment attached in a suspended state using a second attachment member. FIG. 10A and 10B are diagrams illustrating the external configuration of a second mounting member according to the present embodiment. 10A and 10B are diagrams illustrating the external configuration of a second mounting member according to the present embodiment. 10A and 10B are diagrams illustrating the external configuration of a second mounting member according to the present embodiment. 10A to 10C are diagrams illustrating a method of attaching an electronic device using the second attachment member of the present embodiment. 1 is a diagram showing the electronic device of the present embodiment attached by being suspended using an attachment member; 1 is a diagram showing the electronic device of the present embodiment attached by being suspended using an attachment member; 1 is a diagram showing the electronic device of the present embodiment attached by being suspended using an attachment member; 1A and 1B are diagrams illustrating the external configuration of a mounting member according to the present embodiment. 1A and 1B are diagrams illustrating the external configuration of a mounting member according to the present embodiment. 1 is a diagram showing a state in which an electronic device is attached to a windshield using the attachment member of the present embodiment, as viewed from the side. 1A and 1B are diagrams illustrating the external configuration of a mounting member according to the present embodiment. 1A to 1C are six views showing the external configuration of a second mounting member of the present embodiment. 1A to 1C are six views showing the external configuration of a mounting member according to an embodiment of the present invention. 3A to 3C are diagrams illustrating the operation of the electronic device of the present embodiment. 3A to 3C are diagrams illustrating the operation of the electronic device of the present embodiment. 10A and 10B are diagrams illustrating an example of characteristics of a first wavelength selection section and a second wavelength selection section according to a modified example. FIG. 10 is a diagram showing a configuration of a light receiving section according to a modified example. FIG. 10 is a diagram illustrating control performed by a control unit according to a modified example.

Embodiments will be described in detail below with reference to the drawings. The embodiments described below are examples of embodiments of the present disclosure, and the present disclosure is not limited to these embodiments. In the drawings referenced in this embodiment, identical parts or parts having similar functions will be given the same or similar symbols (symbols consisting of a number followed by A, B, etc.), and repeated explanations may be omitted. In addition, in the drawings referenced in the following explanation, the scale may be different from the actual scale so that each component, area, etc. can be recognized. Below, a description will be given of the system of the present disclosure applied to a system installed in a vehicle that detects a speed measurement device that emits light of a specific wavelength.

1. First embodiment
<1-1. Configuration of First Embodiment>
FIG. 1 is a diagram showing the configuration of a system according to a first embodiment. The electronic device 10 is an electronic device to which the system according to the present disclosure is applied. The electronic device 10 is a detector compatible with optical and radar methods. The electronic device 10 detects a speed measurement device 30. The optical method is a method of detecting light emitted by the speed measurement device 30. In this embodiment, the light emitted by the speed measurement device 30 is pulsed light. More specifically, the light emitted by the speed measurement device 30 is a pulse laser having a certain pulse width. In this case, the optical method can also be called a laser method. The radar method is a method of receiving a predetermined radio wave emitted by a speed measurement device (not shown), which is a radio wave generator. In this embodiment, the predetermined radio wave is a microwave.

Electronic device 10 is a monitor-type device with a substantially rectangular parallelepiped shape. Electronic device 10 is installed in the passenger compartment of vehicle 40. Electronic device 10 is installed on dashboard 41 using, for example, double-sided tape. The housing of electronic device 10 is housing 100. An opening is provided on the front of housing 100. Electronic device 10 has a display unit 13 for displaying an image at the position of this opening. Housing 100 is made of resin or other material.

Speed measurement device 30 is installed at vehicle speed enforcement points. Speed measurement device 30 may be, for example, fixed or mobile, but is preferably mobile. Mobile includes, for example, portable and vehicle-mounted types. In the case of a mobile device, electronic device 10 can detect speed measurement device 30 using an optical system even if the location information of the speed enforcement point is not known. In the example of Figure 1, speed measurement device 30 is installed on a sidewalk adjacent to a roadway and measures the speed of vehicles traveling on this roadway. Speed measurement device 30 measures the distance to vehicles within a predetermined distance (e.g., 70 m), and also measures the speed of vehicles at a point closer to the device by a predetermined distance (e.g., 20 m).

The speed measurement device 30 includes a speed measurement unit 31, an imaging unit 32, and a strobe 33. The speed measurement unit 31 measures the speed of the vehicle using a laser scanning method. Specifically, when the pulsed light Lout reaches and is reflected by the vehicle 40, the speed measurement unit 31 receives the reflected light Lref. The speed measurement unit 31 measures the distance to the vehicle 40 based on the time required from emitting the pulsed light Lout to receiving the reflected light Lref. The speed measurement unit 31 repeatedly measures the distance to the vehicle 40 and measures the speed of the vehicle 40 based on the distance traveled by the vehicle 40 per unit time.

The speed measurement unit 31 emits pulsed light Lout while changing its direction within a sector-shaped range T with a central angle θ. θ is, for example, 110 degrees. Range T includes a wider range upstream of the position where the speed measurement device 30 is installed in the direction of travel of the vehicle 40 than the range downstream. The speed measurement unit 31 changes the emission direction of pulsed light Lout counterclockwise. For example, the speed measurement unit 31 emits pulsed light Lout in the direction of arrow D1, and then emits pulsed light Lout in the direction of arrow D2. The emission direction of pulsed light Lout is, for example, approximately horizontal. For example, the speed measurement unit 31 emits pulsed light toward a mirror rotating at a constant speed. The pulsed light reflected by the mirror and emitted from the light-emitting window is pulsed light Lout.

The pulsed light Lout has energy concentrated at a specific wavelength. The specific wavelength is preferably the wavelength at which the energy of the light emitted by the light-emitting device peaks. It is desirable that the pulsed light Lout has energy at a specific wavelength outside the visible light range, for example. The specific wavelength is preferably a wavelength that is not perceptible to humans, and for example, it is desirable that the pulsed light Lout has energy at a specific wavelength outside the visible light range. The specific wavelength is, for example, 905 nm, which belongs to the infrared light range. However, the specific wavelength is not limited to this and may be 850 nm, 950 nm, 1900 nm, or other wavelengths.

Figure 2 shows an example of the waveform of pulsed light Lout emitted from the speed measurement device 30. In this example, pulsed light Lout is a rectangular wave. However, pulsed light Lout may also be a sine wave, triangular wave, sawtooth wave, or other waveform. Pulsed light Lout is light in which periods T1 and T2 alternate. Period T1 is the period during which pulsed light of a specific wavelength λout is emitted. During period T1, pulsed light Lout alternates between high level (H) and low level (L). Period T2 is the period during which light of this pulse waveform is not emitted. As described above, the speed measurement device 30 emits pulsed light toward a mirror rotating at a constant speed, and this mirror reflects and emits pulsed light Lout. Therefore, the period during which the pulsed light from the mirror is not directed toward the light-emitting window of the speed measurement device 30 is period T2.

The imaging unit 32 captures an image of the target vehicle when the speed measured by the speed measurement unit 31 is equal to or greater than a threshold value. The imaging unit 32 is used to capture images of vehicles that have violated the speeding rule. The strobe 33 emits light when an image is captured by the imaging unit 32. The imaging unit 32 preferably captures images based on light in the infrared range so that images can be captured even at night. In this case, the strobe 33 preferably emits light with energy in the infrared range. The speed measurement device 30 transmits data such as the measured speed and captured images to an external computer.

Figure 3 is a rear view of the electronic device 10. As shown in Figure 3, a first window 101 and a second window 102 are formed on the rear surface of the housing 100. The first window 101 and the second window 102 are openings for guiding external light into the interior of the housing 100. The first window 101 and the second window 102 are arranged with a predetermined distance between them in the left-right direction. The first window 101 and the second window 102 are, for example, rectangular, but may be other shapes. A light receiving unit 12 is provided inside the housing 100. The light receiving unit 12 receives light incident through the first window 101 and the second window 102.

Figures 4 and 5 are cross-sectional views of the electronic device 10. Figure 4(a) is a cross-sectional view of the electronic device 10 cut vertically at a position including the first window 101 (cross-sectional view I-I in Figure 3). Figure 4(b) is a cross-sectional view of the electronic device 10 cut vertically at a position including the second window 102 (cross-sectional view II-II in Figure 3). Figure 5 is a cross-sectional view of the electronic device 10 cut horizontally at a position including the first window 101 and the second window 102 (cross-sectional view III-III in Figure 3). Figure 6 is a graph showing an example of the general characteristics of the wavelength selection unit (described later) of the light receiving unit 12. In Figure 6, the horizontal axis corresponds to wavelength, and the vertical axis corresponds to transmittance.

As shown in Figures 4(a) and (b), the first window 101 is provided with a visible light cut filter 126. The second window 102 is provided with a visible light cut filter 127. The visible light cut filters 126 and 127 block at least a portion of visible light. The visible light cut filters 126 and 127 transmit light of a specific wavelength λout. Blocking visible light preferably means at least attenuating the visible light. The visible light range is, for example, 400 to 700 nm. The presence of the visible light cut filters 126 and 127 makes it difficult for components housed inside the housing 100 to be seen from the outside. Furthermore, the presence of the visible light cut filters 126 and 127 can reduce the adverse effects of the light receiving unit 12 receiving strong visible light, such as direct sunlight.

As shown in FIG. 4(a), a first wavelength selection unit 121 and a first light receiving element 122 are provided facing the first window 101. The first wavelength selection unit 121 selects and transmits light of a specific wavelength λout from the incident light. Wavelength selection can also mean selecting a portion of wavelengths from a certain wavelength range and not selecting at least some other wavelengths. In this case, the first wavelength selection unit 121 is a band-pass filter. As shown by the solid line in FIG. 6, it transmits light of wavelengths in a wavelength range including the specific wavelength λout, in this case, the wavelength range from wavelength λ1a to wavelength λ1b, and blocks light of other wavelength ranges. Blocking light means attenuating at least that light, and the amount of attenuation of wavelengths that are blocked is greater than the amount of attenuation of wavelengths that are transmitted. The characteristics of the first wavelength selection unit 121 are determined from the perspective of transmitting as much light as possible that has the same wavelength as the pulsed light from the speed measurement device 30. The width of the wavelength region from wavelength λ1a to wavelength λ1b is, for example, 20 nm, but it is more desirable for it to be narrower than this.

Note that in Figure 6, the transmittance of the frequency range through which light passes is shown as 100%, and the frequency range through which light is blocked is shown as nearly 0%, but any transmittance that is practically tolerable for each is sufficient. It is desirable for the wavelength selection unit to exhibit a steep characteristic as exemplified in Figure 6, but it may also exhibit a broader characteristic. For example, there may be wavelengths for which the transmittance of both the first wavelength selection unit 121 and the second wavelength selection unit 123 is not 0%.

The first light receiving element 122 receives the light transmitted by the first wavelength selection unit 121 and outputs a first signal corresponding to the first received light amount, which is the amount of light received. The first light receiving element 122 is preferably a photodiode, for example, but may also be a phototransistor or other light receiving element. The first light receiving element 122 is sensitive to at least the infrared light range. The first light receiving element 122 includes, for example, a resin mold that transmits infrared light. The first light receiving element 122 is preferably configured not to receive light in the wavelength range of 700 nm or less. The first light receiving element 122 is a so-called lensless type light receiving element that does not have a lens. This increases the light acceptance angle of the first light receiving element 122 (e.g., 120 to 180 degrees), enabling it to receive light from multiple directions. Alternatively, a lens or mirror may be combined to widen the light acceptance angle of the first light receiving element 122.

As shown in FIG. 4(b), a second wavelength selection unit 123 and a second light receiving element 124 are provided facing the second window 102. The second wavelength selection unit 123 is a filter that selects and transmits light in a wavelength range different from the specific wavelength λout from the incident light. The wavelength different from the specific wavelength is preferably a wavelength different from the wavelength at which the energy of the light emitted by the light emitting device peaks. The wavelength different from the specific wavelength is preferably a wavelength included in the visible light range. The second wavelength selection unit 123 is, for example, a band elimination filter. As shown by the dashed line in FIG. 6, the second wavelength selection unit 123 blocks light in a wavelength range including the specific wavelength λout, in this case the wavelength range from wavelength λ2a to wavelength λ2b, and transmits light in other wavelength ranges. It is desirable that the wavelength range from wavelength λ2a to wavelength λ2b does not include the specific wavelength λout, and preferably includes a wide wavelength range other than the specific wavelength λout. The characteristics of the second wavelength selection unit 123 are determined from the viewpoint of transmitting only light with wavelengths that differ as much as possible from the pulsed light Lout from the speed measurement device 30.

The second light receiving element 124 receives light that has passed through the second wavelength selection unit 123 and outputs a second signal corresponding to the second amount of received light. The second light receiving element 124 is, for example, a photodiode, but may also be a phototransistor or other light receiving element. It is preferable that the second light receiving element 124 has the same characteristics as the first light receiving element 122, for example, the same product (e.g., model number). This is because when the second light receiving element 124 and the first light receiving element 122 receive the same light, the first signal Sig1 and the second signal Sig2 will be the same signal. Like the first light receiving element 122, the second light receiving element 124 is a so-called lensless type sensor that does not have a lens.

As shown in FIG. 5, the housing 100 includes a partition 103 that blocks light between the first light receiving element 122 and the second light receiving element 124. It is desirable that the distance between the first light receiving element 122 and the second light receiving element 124 be as small as possible. This is to prevent a difference in the timing of light incidence between the first light receiving element 122 and the second light receiving element 124. Even in this case, the presence of the partition 103 reduces the possibility that light that has passed through the first wavelength selection unit 121 will be received by the second light receiving element 124, and that light that has passed through the second wavelength selection unit 123 will be received by the first light receiving element 122.

The light receiving unit 12 is preferably shielded using a conductive material. This shield is made of, for example, a metal case. This reduces the effects of electromagnetic noise on the electronic components inside the housing 100.

The first window 101, the second window 102, and the light receiving unit 12 may be arranged so that they face diagonally forward (e.g., forward left) with respect to the direction of travel of the vehicle 40 when the display unit 13 of the electronic device 10 is facing the driver's seat of the vehicle 40. This may make it easier for the light receiving unit 12 to receive the pulsed light Lout from the speed measurement device 30.

Figure 7 is a block diagram showing the electrical configuration of electronic device 10. Control unit 11 controls each unit of electronic device 10. Control unit 11 is, for example, a computer including a processing circuit and memory. The processing circuit includes, for example, a CPU (Central Processing Unit), an ASIC (Application Specific Integrated Circuit), an FPGA (Field-Programmable Gate Array), or other processing circuit. The memory includes, for example, RAM (Random Access Memory) or other volatile memory. The processing circuit performs various controls by temporarily reading data into memory and performing processing.

The light receiving unit 12 includes a first wavelength selection unit 121, a first light receiving element 122, a second wavelength selection unit 123, a second light receiving element 124, and an interface 125. The first wavelength selection unit 121 selects, for example, a wavelength range from wavelength λ1a to wavelength λ1b from the incident light and transmits it as light Lin1. The first light receiving element 122 receives light Lin1 and outputs a first signal Sig1 corresponding to the first amount of received light. The first amount of received light may indicate the amount of light of a specific wavelength selected and received by the light receiving unit 12. The first signal Sig1 indicates the amount of received light Lin1. The second wavelength selection unit 123 selects a wavelength range different from the wavelength range from wavelength λ2a to wavelength λ2b and transmits it as light Lin2. The second light receiving element 124 receives light Lin2 and outputs a second signal Sig2 corresponding to the second amount of received light. The second received light amount may indicate the amount of light of a wavelength different from the specific wavelength selected and received by the light receiving unit 12. The second signal Sig2 indicates the amount of received light Lin2. The interface 125 processes the first signal Sig1 and the second signal Sig2 and outputs the processed signals to the control unit 11. The interface 125, for example, converts the first signal Sig1 and the second signal Sig2 into digital format and outputs them.

The display unit 13 displays images. The display unit 13 is, for example, a 3.2-inch color TFT LCD display. However, the display unit 13 may also be an organic EL display or other display device. The speaker 14 outputs audio. The microwave receiver 15 includes an antenna and a receiving circuit and receives microwaves. The GPS (Global Positioning System) receiver 16 includes an antenna and a receiving circuit and receives signals from GPS satellites. The GPS receiver 16 processes the received signals and outputs location information. The location information includes, for example, latitude information and longitude information, and may also include altitude information. The communication unit 17 communicates with external devices. The communication unit 17 performs wireless communication using, for example, Wi-Fi (registered trademark), Bluetooth (registered trademark), or other methods.

The memory unit 18 stores data. The memory unit 18 stores, for example, programs that the control unit 11 uses to perform various controls. The control unit 11 reads the programs from the memory unit 18 into memory and executes them. The memory unit 18 also stores map data showing maps, data showing the types and locations of various facilities, data for notifying the presence of objects to be notified, data for implementing route guidance functions, and the like. Examples of objects to be notified include locations of drowsy driving accidents, speed measurement devices (radar, loop coil, H system, LH system, photocell, mobile, etc.), speed limit change points, enforcement areas, checkpoints, parking monitoring areas, N system, traffic monitoring systems, intersection monitoring points, red light ignorance prevention systems, police stations, accident-prone areas, vehicle theft-prone areas, sharp/continuous curves (expressways), branch/merge points (expressways), ETC lane advance guidance (expressways), service areas (expressways), parking areas (expressways), highway oases (expressways), smart interchanges (expressways), PA/SA gas stations (expressways), tunnels (expressways), highway radio reception areas (expressways), prefectural border announcements, roadside stations, and viewpoint parking. The memory unit 18 stores information on the type of object to be notified, location information indicating its location, image data (e.g., schematic diagram or photograph) to be displayed on the display unit 13, and audio data, in association with each other.

Note that the storage unit 18 may include a storage medium that permanently stores data. The storage unit 18 may include, for example, an optical recording medium, a magnetic recording medium, a semiconductor recording medium, or other recording media.

The operation unit 19 accepts user operations. The operation unit 19 includes, for example, a touch sensor, a volume adjustment button, and operation buttons. The touch sensor is provided on the surface of the display unit 13 and detects the position touched by the user. The volume adjustment button is operated to adjust the volume of the sound output from the speaker 14. The operation buttons are buttons for performing various operations.

The sensor unit 20 includes various sensors. For example, the sensor unit 20 is equipped with a geomagnetic sensor, an acceleration sensor, and an illuminance sensor. The geomagnetic sensor detects the geomagnetism to determine which direction north is relative to the direction of travel. The acceleration sensor detects the acceleration of the vehicle in the front-to-back, left-to-right, and up-to-down directions. The illuminance sensor detects the illuminance, which indicates the brightness inside the vehicle cabin.

The mounting unit 21 is a mounting unit into which an external storage medium is mounted, such as a memory card. In this case, the mounting unit 21 is a memory card slot. Data stored in the storage unit 18 may be imported via the external storage medium. This data includes updated information on new target information (location information such as longitude and latitude, type information, etc.).

The power supply unit 22 supplies power from the power source to various components within the electronic device 10. The power supply unit 22 includes, for example, a power switch and a DC jack. The DC jack is used to connect a cigarette lighter plug cord, and is connected to the vehicle's cigarette lighter socket via the cigarette plug cord to receive power. The power switch is a switch for turning the power of the electronic device 10 on and off.

The light-emitting unit 23 emits light in various colors. The light-emitting unit 23 includes, for example, a light-emitting diode.

The cable terminal section 24 is a terminal to which an external connection cable is connected. For example, the connection cable is a cable that connects the electronic device 10 to an OBD-II connector installed in a vehicle. The OBD-II connector, also known as a diagnostic connector, is connected to the vehicle's ECU (Engine Control Unit) and outputs various vehicle information.

In addition to the above, the electronic device 10 may also have functions that are common in radar detectors.

<1-2. Operation of the First Embodiment>
Next, the operation of this embodiment will be described.
<1-2-1. Optical Notification>
8 is a flowchart showing the operation of the control unit 11 of the electronic device 10. FIG. 8 shows the operation when detecting the speed measurement device 30 by an optical method. When the electronic device 10 starts operating, the control unit 11 executes the process described below. There is no particular limitation on the trigger for starting the operation of the electronic device 10, but it is preferable that the trigger be, for example, when the power of the electronic device 10 is turned on or when execution of a route guidance function is started.

The control unit 11 first starts displaying a map screen on the display unit 13 (step S1). The map screen is a screen that shows the vehicle's position on a map. The map displayed on the display unit 13 is determined based on map data and location information from the GPS receiver unit 16. The vehicle's position is determined based on the location information from the GPS receiver unit 16. Figure 9 is a diagram showing an example of a map screen. The map screen shown in Figure 9 has an icon I1 indicating the vehicle's position placed on a map M. The map screen also displays the address of the current location, the distance to a specified notification object (here, "1,960 m to H system"), the speed limit, and photos of the area around the speed enforcement point. Figure 10 is a diagram showing another example of a map screen. The map screen shown in Figure 10 also has an icon I1 indicating the vehicle's position placed on a map M. An example of control when the map screen shown in Figure 10 is displayed is described below. The icon may be replaced with text, symbols, figures, or other objects.

Next, the control unit 11 acquires the first signal Sig1 and the second signal Sig2 from the light receiving unit 12 (step S2). Next, the control unit 11 calculates the difference between the first amount of received light corresponding to the first signal Sig1 and the second amount of received light corresponding to the second signal Sig2 (step S3). Next, the control unit 11 determines whether the calculated difference is equal to or greater than a threshold value (step S4). If the difference is less than the threshold value, the control unit 11 determines "NO" in step S4 and returns to the processing of step S2. In this case, the control unit 11 determines that the speed measurement device 30 has not been detected and does not notify the presence of the speed measurement device 30.

On the other hand, if the calculated difference is equal to or greater than the threshold, the control unit 11 determines "YES" in step S4 and performs notification control (step S5). Notification control is control to notify the user of the presence of the speed measurement device 30. Notification control can be said to be control to issue an alarm to make the user aware of what the speed measurement device is doing. Here, notification control is control to notify the user of the presence of the speed measurement device 30 using the first method. Notification control includes, for example, control to display a notification screen on the display unit 13.

Figure 11 is a diagram showing an example of a notification screen. The notification screen shown in Figure 11 is a screen in which window W1 is superimposed on the map screen described above. Window W1 displays an icon M1 indicating the presence of a speed measurement device 30 and a message indicating the presence of the speed measurement device 30, stating, "You are approaching a speed control point. Please be careful." Icon M1 is an icon that allows the user to recognize that the speed measurement device 30 is optically compatible. Notification control may include control to output a notification sound from speaker 14. In this case, the control unit 11 may output a sound from speaker 14 saying, "You are approaching a laser speed control point. Please be careful." Notification control may include other controls, such as control to cause the light-emitting unit 23 to emit light. Notification control may be control that notifies the user of the presence of the speed measurement device 30 in a manner that allows the user to recognize it.

Next, the control unit 11 determines whether to end the processing of FIG. 8 (step S6). The trigger for ending the processing is not particularly limited; however, it may be, for example, when the electronic device 10 is turned off by operating the operation unit 19, or when the route guidance function is stopped. If the determination in step S6 is "NO," the control unit 11 returns to the processing of step S2 and repeats the above processing (step S4). For example, if the difference changes from above the threshold to below the threshold, the control unit 11 determines "NO" in step S4 and stops the notification control. In this case, the control unit 11 displays the map screen shown in FIG. 12 on the display unit 13. This is because it means that a speed control point has been passed. If the determination in step S6 is "YES," the control unit 11 ends the processing of FIG. 8 (step S7).

Here, we explain why the speed measurement device 30 can be detected using the above-mentioned method. As explained in Figure 6, the first wavelength selection unit 121 selects and transmits light at a specific wavelength λout (more specifically, the wavelength range from wavelength λ1a to wavelength λ1b) at which the pulsed light Lout has energy. Therefore, the first signal Sig1 should exhibit a large amount of received light during periods when the pulsed light Lout is received, and a small amount of received light during other periods. However, the light receiving unit 12 may receive not only the pulsed light Lout, which is the target of reception, but also disturbance light. This disturbance light may be mistaken for pulsed light. An example of disturbance light is light that arrives when sunlight is periodically blocked by tree branches and leaves swayed by the wind. Other examples of disturbance light include light from traffic lights and advertisements that periodically turn on and off, and the light from rotating warning lights that rotate at a constant speed. Furthermore, the light received by the light receiving unit changes due to vibration of the light receiving unit. For example, if the vehicle 40 travels over a pier or other location where periodic vibrations occur, the orientation of the light receiving unit 12 (e.g., the first light receiving element 122) may change, causing it to receive sunlight or other light as light that repeatedly turns on and off at a predetermined cycle. Even in such a case, the first signal Sig1 will indicate a relatively large amount of received light.

In contrast, the second wavelength selection unit 123 blocks light at a specific wavelength λout (in this embodiment, the wavelength range from wavelength λ2a to wavelength λ2b) where the pulsed light Lout has energy, and transmits light in other wavelength ranges. Therefore, the amount of light received by the second signal Sig2 is small during the period when the pulsed light Lout is received. The second light receiving element 124 receives the above-mentioned disturbance light, which generally has a wide wavelength range over which its energy is distributed. Therefore, even when the light receiving unit 12 receives disturbance light that is periodically turned on and off, the amount of light received by the second light receiving element 124 is likely to be large. Therefore, when the amount of light received by the first signal Sig1 is large and the amount of light received by the second signal Sig2 is small, i.e., when the difference in the amount of light received is equal to or greater than a threshold, it can be assumed that the pulsed light Lout has been received. On the other hand, if the amount of light received by the first signal Sig1 is large and the amount of light received by the second signal Sig2 is also large, that is, if the difference in the amount of light received is less than the threshold, it can be estimated that the pulsed light Lout is unlikely to have been received. Therefore, according to the electronic device 10, by receiving light using the first light receiving element 122 and the second light receiving element 124, it is expected that the detection accuracy of the speed measurement device 30 will be improved.

<1-2-2. Radar Notification>
The control unit 11 may further execute the process of FIG. 13 in parallel with the process of FIG. 8 based on the microwave received by the microwave receiving unit 15 .

First, the control unit 11 acquires a microwave reception signal from the microwave receiving unit 15 (step S11). Next, the control unit 11 performs a determination process to determine whether or not a radar-based speed measurement device is present based on the microwave reception signal (step S12). In step S12, the control unit 11 may determine whether or not a speed control point is present based on the frequency band of the received microwaves. The algorithm for this determination may be, for example, the method described in Patent Document 1 or 2, and a description thereof will be omitted.

Next, the control unit 11 determines whether a speed measurement device has been detected based on the results of the determination process (step S13). If the determination in step S13 is "YES," the control unit 11 performs notification control (step S14). Here, the notification control is control to notify the user of the presence of a speed measurement device using a third method. The notification control includes, for example, control to display a notification screen on the display unit 13. Figure 14 is a diagram showing an example of a notification screen. The notification screen shown in Figure 14 is a screen in which window W2 is superimposed on the map screen described above. Window W2 displays icon M2 indicating the presence of a speed measurement device 30 and a message indicating the presence of a speed measurement device, such as "Approaching a speed control point. Please be careful." Icon M2 is an icon that allows the user to recognize that the speed control device is radar-based. In other words, icon M2 is different from icon M1. Note that the notification control may also include control to output a notification sound from the speaker 14. In this case, the control unit 11 may output a voice message from the speaker 14 saying, "You are approaching a radar speed control point. Please be careful." The notification control may be other controls, such as control to cause the light emitting unit 23 to emit light. Here too, the notification control may be control that notifies the user in a way that allows the user to recognize the presence of the speed measurement device.

<1-3. Modification of the first embodiment>
The control unit 11 may further perform the following control.
<1-3-1. Notification according to the number of pulses>
When the speed measurement device 30 emits light with a pulse waveform, referring to the number of pulses is also useful in detecting the speed measurement device 30. FIG. 15 is a diagram showing an example of the waveform of the pulsed light Lout received by the electronic device 10. FIG. 15( a) shows a case where the distance between the electronic device 10 and the speed measurement device 30 is relatively large, and FIG. 15( b) shows a case where the distance between the electronic device 10 and the speed measurement device 30 is relatively small. As shown in FIG. 15( a), when the distance between the speed measurement device 30 and the electronic device 10 is relatively large, the pulsed light Lout traveling in the direction of the electronic device 10 can be received, but the pulsed light propagating only in a direction on the road close to the speed measurement device 30 (for example, directly to the side of the speed measurement device 30) is not received. Therefore, the light-reception period Rx1 of the pulsed light Lout becomes shorter relative to the light-non-reception period Rx2. 15(b), when the distance between the speed measurement device 30 and the electronic device 10 is relatively short, the pulsed light Lout traveling in the direction of the electronic device 10 can be received, and pulsed light propagating only through a position on the road close to the speed measurement device 30 can also be received. Therefore, the light-receiving period Rx1 of the pulsed light Lout becomes relatively long compared to the light-non-receiving period Rx2. It is also considered that the number of pulses decreases immediately after the vehicle 40 passes the position of the speed measurement device 30. Note that in practice, the relationship Rx1<<Rx2 may be satisfied.

The control unit 11 may therefore perform notification control according to the number of pulses. The control unit 11 may, for example, change the notification level according to the number of pulses included in the light-receiving period of the pulsed light. The notification level is an indicator of how important the notification content is to the user, and in this embodiment, may be referred to as an alarm level. The control unit 11 identifies the number of pulses based on at least the amount of light received by the first light-receiving element 122. For example, the control unit 11 increases the notification level during periods when the number of pulses is equal to or greater than a threshold value, or during periods when the number of pulses is increasing, indicating that the vehicle is approaching the speed measurement device 30. The control unit 11 decreases the notification level during periods when the number of pulses is less than a threshold value, or during periods when the number of pulse widths is decreasing, indicating that the vehicle is far from or moving away from the speed measurement device 30. The control unit 11 varies the notification method according to the notification level. For example, the control unit 11 may change the message displayed on the display unit 13, change the notification sound output from the speaker 14, or change the light color emitted by the light-emitting unit 23 depending on the notification level.

The control unit 11 may also estimate the distance from the number of pulse widths and provide a notification based on that distance. For example, as shown in FIG. 16, the control unit 11 may estimate the position of the speed measurement device 30 from the number of pulse widths and display it on a map. In this example, an icon P indicates the position of the speed measurement device 30. As described above, the control unit 11 can provide a notification to the user based on the positional relationship between the light receiving unit 12 and the speed measurement device 30.

17, if another vehicle is present ahead of vehicle 40, the pulsed light Lout may be partially or completely blocked by vehicle C traveling ahead. In this case, the positional relationship may not be accurately determined even if the number of pulses is referenced. Therefore, control unit 11 detects the presence or absence of another vehicle C ahead within a predetermined range from vehicle 40. If no other vehicle C is present, control unit 11 performs notification control according to the number of pulses, and stops the notification control if vehicle C is present. Stopping notification control according to the number of pulses may mean not changing the content of notification control according to the number of pulses. Furthermore, electronic device 10 may stop notification control according to the number of pulses if the inter-vehicle distance is less than a threshold, and perform this notification control if the inter-vehicle distance is equal to or greater than the threshold. There is no particular limit to the method for detecting vehicle C, but one method uses an on-board camera 50. On-board camera 50 is, for example, a camera used in a drive recorder, and captures images ahead of vehicle 40.

Figure 18 is a flowchart showing the operation of the control unit 11 of the electronic device 10 in this case. The control unit 11 acquires a captured image from the in-vehicle camera 50 via the communication unit 17 (step S21). Next, the control unit 11 analyzes the captured image (step S22). Any algorithm for analyzing the captured image is acceptable, but a pattern matching method is one example. The control unit 11 then determines whether there is a vehicle ahead (step S23). If the determination in step S23 is "NO," the control unit 11 determines that notification control based on the number of pulses will be performed (step S24). In this case, the control unit 11 performs processing such as rewriting a flag to a value indicating that control based on the number of pulses will be performed. If the determination in step S23 is "YES," the control unit 11 determines that notification control based on the number of pulses will be stopped (step S25). In this case, the control unit 11 performs processing such as rewriting a predetermined flag to a value indicating that control based on the number of pulses will not be performed. Here, a vehicle ahead of the vehicle 40 is detected, but it may also be behind the vehicle 40. The electronic device 10 may also have a built-in in-vehicle camera 50. This reduces the possibility of misidentifying the positional relationship between the light receiving unit 12 and the speed measurement device 30 due to the presence of another vehicle C.

<1-3-2. Control according to pulse width or pulse interval>
When the speed measurement device 30 emits pulsed light, referring to the pulse width or pulse interval is also useful for detecting the speed measurement device 30. The speed measurement device 30 emits pulsed light of a specific wavelength at a predetermined duty ratio. For safety reasons, the duty ratio of the pulsed light is set to less than a predetermined value. Therefore, the control unit 11 may determine whether the speed measurement device 30 is present based on a predetermined pulse width or pulse interval and the pulse width or pulse interval of the received light. For example, the control unit 11 determines that the speed measurement device 30 is present if the pulse width or pulse interval falls within a certain range from a reference pulse width or pulse interval, but determines that the speed measurement device 30 is not present otherwise. The control unit 11 identifies the pulse width or pulse interval based on at least the amount of light received by the first light receiving element 122. As described above, the control unit 11 can reduce the number of alerts that mistakenly identify ambient light as light from a light-emitting device.

<1-3-3. Control according to the intensity of pulsed light>
Referencing the intensity of the pulsed light of the received light is also useful in detecting the speed measurement device 30. The intensity of the pulsed light increases as the vehicle 40 approaches the speed measurement device 30, and decreases as the vehicle 40 moves away from the speed measurement device 30. Therefore, the control unit 11 may change the notification level depending on the amount of pulsed light received by the first light receiving element 122. For example, the control unit 11 may raise the notification level when the intensity of the pulsed light is increasing, and lower the notification level when the intensity of the pulsed light is decreasing. Furthermore, the control unit 11 may determine that the speed measurement device 30 is not present when the amount of received pulsed light is less than a threshold. As described above, the control unit 11 can provide a notification to the user depending on the positional relationship between the light receiving unit 12 and the speed measurement device 30.

Disturbing light may also include light used by sensors for detecting other vehicles, such as inter-vehicle sensors. Such light may have the same frequency as the pulsed light Lout. Even in such cases, the electronic device 10 can be expected to reduce the possibility of false alarms by referring to the pulse interval or intensity of the received light.

<1-3-4. Notification of imaging availability>
After performing the notification control, the control unit 11 may control the control to notify the user that an image has been captured or that an image has not been captured, depending on whether a predetermined light is detected. When an image is captured by the image capture unit 32, the strobe 33 emits light. Therefore, after performing the notification control, the control unit 11 may further notify the user that an image has been captured if it detects light from the strobe 33. Alternatively, after performing the notification control, the control unit 11 may notify the user that an image has not been captured if it does not detect light from the strobe 33. This allows the user to know whether an image of the vehicle 40 has been captured. Note that light from the strobe 33 may be received using the light receiving unit 12 or a separate light receiving unit.

[2. Second embodiment]
In this embodiment, even when the electronic device 10 does not receive pulsed light or microwaves, it has a function of notifying the presence of the speed measurement device 30. The electronic device of this embodiment may have some or all of the functions of the first embodiment described above, or may not have them.

<2-1. Configuration of the second embodiment>
FIG. 19 is a diagram illustrating an overview of the system of this embodiment. As shown in FIG. 19, there are various types of roads. For example, on road Ar1, which is also used as a school route and is called a green belt, it is particularly important that vehicles 40 comply with the speed limit, and it is considered that the possibility of installing a speed measurement device 30 is higher than on road Ar2 of other types. Therefore, the control unit 11 may notify the presence of a speed measurement device 30 when the electronic device 10 is located on a predetermined type of road.

<2-2. Operation of the Second Embodiment>
20 is a flowchart showing the operation of the control unit 11 of the electronic device 10. The control unit 11 acquires location information from the GPS receiver 16 (step S31). Next, the control unit 11 determines whether the current location indicated by the location information is within a predetermined area (step S32). Here, the control unit 11 determines whether the vehicle 40 is on a green belt based on the current location and the data stored in the memory unit 18. If the control unit 11 determines "YES" in step S32, it performs notification control (step S33). The notification control includes, for example, control to display a notification screen on the display unit 13.

Figure 21 is a diagram showing an example of a notification screen. The notification screen shown in Figure 21 is a screen in which window W3 is superimposed on the map screen described above. Window W3 displays icon M3, which indicates the presence of a speed measurement device 30, and a message indicating the presence of a speed measurement device, stating, "You are in a speed enforcement alert area." Icon M3 is an icon that allows the user to recognize that a speed enforcement point is being detected based on location information. That is, for example, icon M3 is different from icons M1 and M2. The notification control may include control to output a notification sound from speaker 14. In this case, control unit 11 may output a sound from speaker 14 stating, "You are in a speed enforcement alert area." The notification control may also include other controls, such as control to cause light-emitting unit 23 to emit light. The specified area is not limited to a green belt, but may also be a one-way road or other type of road.

In this way, the presence of the light-emitting device can be reported based on position information, so its presence can be reported even without receiving pulsed light from the speed measurement device 30.

3. Third embodiment
In this embodiment, the electronic device 10 has a plurality of light receiving units that receive pulsed light.

Figure 22 is a block diagram showing the electrical configuration of electronic device 10. In this example, electronic device 10 has three light receiving units 12A, 12B, and 12C. The configuration of each of light receiving units 12A, 12B, and 12C may be the same as light receiving unit 12, except for the characteristics of the wavelength selection unit. Note that Figure 22 omits the display unit 13 to cable terminal unit 24 described in Figure 6.

Figure 23 shows the characteristics of the first wavelength selection section 121 and the second wavelength selection section 123 of the light receiving units 12A, 12B, and 12C of this embodiment. Figure 23(a) corresponds to the light receiving unit 12A, Figure 23(b) corresponds to the light receiving unit 12B, and Figure 23(c) corresponds to the light receiving unit 12C. As shown in Figures 23(a) to (c), the wavelength of the pulsed light that is the target of light reception differs for each of the light receiving units 12A, 12B, and 12C. As shown by the solid line in Figure 23(a), the first wavelength selection section 121 of the light receiving unit 12A transmits light in a wavelength range that includes the specific wavelength λout1, in this case the wavelength range from wavelength λ11a to wavelength λ11b, and blocks light in other wavelength ranges. As shown by the dashed line in Fig. 23(a), the second wavelength selecting unit 123 blocks light in a wavelength range including the specific wavelength λout1, here the wavelength range from λ21a to λ21b, and transmits light in other wavelength ranges. As shown by the solid line in Fig. 23(b), the first wavelength selecting unit 121 of the light receiving unit 12B transmits light in a wavelength range including the specific wavelength λout2, here the wavelength range from λ12a to λ12b, and blocks light in other wavelength ranges. As shown by the dashed line in Fig. 23(b), the second wavelength selecting unit 123 blocks light in a wavelength range including the specific wavelength λout2, here the wavelength range from λ22a to λ22b, and transmits light in other wavelength ranges. As shown by the solid lines in Figure 23(c), the first wavelength selection unit 121 of the light receiving unit 12C transmits light in a wavelength range including the specific wavelength λout3, in this case the wavelength range from λ13a to λ13b, and blocks light in other wavelength ranges. As shown by the dashed lines in Figure 23(c), the second wavelength selection unit 123 blocks light in a wavelength range including the specific wavelength λout3, in this case the wavelength range from λ23a to λ23b, and transmits light in other wavelength ranges. λout1, out2, and out3 are, for example, 850 nm, 905 nm, and 950 nm, but are not limited to these and may be 1900 nm, for example.

When the control unit 11 detects a speed measurement device 30 based on the first signal Sig1 and the second signal Sig2 from any of the light receiving units 12A, 12B, and 12C, it notifies the presence of the speed measurement device 30. According to this embodiment, the presence of the speed measurement device 30 can be notified even if there are multiple speed measurement devices 30 with different wavelengths of light emitted by the electronic device 10, or if the wavelength of light emitted by the speed measurement device 30 has changed.

The characteristics of multiple light receiving units 12 may be the same. In this case, as shown in FIG. 24, light receiving units 12A, 12B, and 12C may be provided at different positions on vehicle 40. Here, light receiving unit 12A is provided at the left front, light receiving unit 12B at the center front, and light receiving unit 12C at the right front. This makes it possible to estimate the direction of arrival of the laser based on the timing of laser reception at light receiving units 12A, 12B, and 12C. For example, if the laser is coming from the left front, the timing of reception by light receiving unit 12A will be relatively early, and if the laser is coming from the right front, the timing of reception by light receiving unit 12C will be relatively early. Furthermore, control unit 11 may notify the user of the direction from which the pulsed light is coming.

The speed measurement unit 31 also emits pulsed light toward a mirror rotating at a constant speed, and emits pulsed light Lout reflected by this mirror. Therefore, the timing at which the pulsed light Lout is received by each of the light receiving units 12A, 12B, and 12C varies depending on, for example, the rotational speed of the mirror, the positions of the light receiving units 12A, 12B, and 12C, and the distance between the light receiving units 12A, 12B, and 12C and the speed measurement device 30. Therefore, the control unit 11 may detect the speed measurement device 30 based on the timing at which the pulsed light Lout is received by the light receiving units 12A, 12B, and 12C.

The light receiving units 12A, 12B, and 12C may each receive light from a different direction. For example, the orientation of the light receiving elements may differ by 20 degrees between light receiving units 12A, 12B, and 12C. This may reduce the decrease in detection accuracy due to the installation position of the speed measurement device 30. In this embodiment, it is recommended that the number of light receiving units be two, four, or more.

4. Configuration of the light receiving unit 12
Next, a configuration example of the light receiving unit 12 applicable to each of the above-described embodiments will be described.
FIG. 25 is a diagram showing an example circuit configuration of the light receiving unit 12. In this example, the first light receiving element 122 is a photodiode PD1. Light passing through the first wavelength selection unit 121 is incident on the light receiving surface of the photodiode PD1. The cathode of PD1 is connected to a high-potential power supply line, and the anode is connected to one end of a resistor R1. The other end of the resistor R1 is grounded. The input end of the output control circuit A1 is commonly connected to the anode of the photodiode PD1 and one end of the resistor R1. The output end of the output control circuit A1 is connected to the negative input terminal of the differential amplifier AMP. The output control circuit A1 is, for example, an amplifier that adjusts the signal level. In this example, the second light receiving element 124 is a photodiode PD2. Light passing through the second wavelength selection unit 123 is incident on the light receiving surface of the photodiode PD2. The cathode of the photodiode PD2 is connected to a high-potential power supply line, and the anode is connected to one end of a resistor R2. The other end of the resistor R2 is grounded. The input terminal of the output control circuit A2 is commonly connected to the anode of the photodiode PD2 and one terminal of the resistor R2. The output terminal of the output control circuit A2 is connected to the positive input terminal of the differential amplifier AMP. The output control circuit A2 is, for example, an amplifier that adjusts the signal level. A signal corresponding to the difference in the amount of light received by the photodiodes PD1 and PD2 is output from the output terminal of the differential amplifier AMP. The control unit 11 detects the speed measurement device 30 based on this difference. The control unit 11 may detect the speed measurement device 30 based on the signal after it has been amplified by the differential amplifier AMP.

5. External Configuration of Electronic Device 10
FIG. 26 is a six-sided view showing an example of the external configuration of electronic device 10. In this example, a display unit 13, a light-emitting unit 23, and an illuminance sensor 201 of sensor unit 20 are provided on the front of the housing of electronic device 10. A speaker 14 is provided to output sound from the top end surface of housing 100. A mounting unit 21 (i.e., an SD card slot) for mounting an SD card (registered trademark) is provided on the right end surface of housing 100. A light-receiving unit 12 is provided in the upper right portion of the back of housing 100. A power switch 221 and a DC jack 222 of power supply unit 22 are provided in the lower left portion of the back of housing 100. Area 104 is an area where the model name and serial number are written.

6. Other Embodiments of Notification Control Performed by Electronic Device 10
Next, a description will be given of another embodiment of the information notification control performed by the electronic device 10. In the notification control described below, the notification controls described above may be combined as appropriate.
<6-1. Notification regarding pulsed light Lout (fixed type)>
The control unit 11 performs first notification control to notify the presence of a fixed speed measurement device 30. FIG. 27 is a diagram showing an example of a notification screen displayed by the electronic device 10 when pulsed light Lout is received from the fixed speed measurement device 30. As shown in FIG. 27 , this notification screen is a screen in which an icon I11 indicating the position of the vehicle 40 and information display areas TA1, TA2, TB1, and TB2 are superimposed on a map M11. The information display areas TA1 and TA2 are each displayed when pulsed light Lout is received. The information display area TA1 is located in the lower right corner of the display screen. The information display area TA1 displays the attributes of the speed measurement device 30 and the status of the vehicle 40. The information display area TA1 displays, as attributes of the speed measurement device 30, the character string TA11, which indicates that the speed measurement device 30 is an optical system, and an icon TA12 that resembles the speed measurement device 30. The information display area TA1 further displays, as the status of the vehicle 40, a character string TA13 (here, 60 km/h) indicating the current speed of the vehicle 40. In this way, the electronic device 10 can allow the user to recognize at least one of the information regarding the attribute of the speed measurement device 30 and the status of the vehicle 40. The attribute of the speed measurement device may be another attribute, such as an estimated distance from the vehicle 40. If the notification level can be specified, the information display area TA1 may display the notification level. The status of the vehicle 40 may indicate other driving conditions, such as engine speed, in addition to speed.

Information display area TA2 is located in the lower left corner of the display screen. Information display area TA2 displays an animated image including an image that resembles the speed measurement device 30. An animated image is an image that gives the viewer the impression that the image is moving by displaying multiple still images (frames) that are switched sequentially at a predetermined time interval. In this way, electronic device 10 can make it easier for the user to recognize the presence of a speed measurement device 30 that the vehicle 40 is approaching. Information display area TB1 is located in the upper right corner of the display screen and displays the address of the current location. Information display area TB2 is located in the upper left corner of the display screen and displays the current time. In addition to providing a visual notification, control unit 11 may also provide a predetermined audio notification.

28 and 29 show examples of animation images displayed in the information display area TA2. In FIGS. 28 and 29, the images in each frame are displayed in the order indicated by the arrows. After the rightmost frame in the bottom row of FIG. 28 is displayed, the leftmost frame in the top row of FIG. 29 is displayed. After the rightmost frame in the bottom row of FIG. 29 is displayed, the leftmost frame in the top row of FIG. 28 is displayed again. As shown in FIG. 28, the animation image includes an image TA21 showing the side of the road, an image TA22 simulating a speed measurement device, and an image TA23 visually representing the area illuminated by the pulsed light emitted from the speed measurement device. As shown in FIGS. 28 and 29, the animation image shows the vehicle approaching the speed measurement device over time, and after the closest approach, an image showing the speed measurement device as viewed from a position far away from the device (see the frame surrounded by a dashed line) is displayed. The animation image then shows the vehicle again approaching the speed measurement device over time. While the pulsed light Lout is being received, the control unit 11 displays an animation in which the images of each frame are displayed in the order described above. When the control unit 11 no longer detects the presence of the optical speed measurement device 30, it stops the notification immediately or after a predetermined time. This predetermined time may be, for example, three seconds. The first frame in the animation may be an image showing the speed measurement device as seen from a position farthest away from the speed measurement device (see the frame surrounded by a dashed line).

<6-2. Notification regarding pulsed light Lout (mobile)>
The control unit 11 performs second notification control to notify the presence of a mobile speed measurement device 30. The second notification control is different from the first notification control. FIG. 30 is a diagram showing an example of a notification screen displayed by the electronic device 10 when pulsed light Lout is received from the mobile speed measurement device 30. As shown in FIG. 30, this notification screen is a screen in which an icon I11 indicating the position of the vehicle 40 and information display areas TA1, TA3, TB1, and TB2 are superimposed on a map M11. The information display areas TA1, TB1, and TB2 are the same as the information display areas TA1, TB1, and TB2 described in FIG. 27. The information display area TA3 is displayed when pulsed light Lout is received. The information display area TA3 is located in the lower left corner of the display screen. The information display area TA1 displays the attributes of the speed measurement device 30 and the status of the vehicle 40. The information display area TA3 displays an animated image including an image of the speed measurement device 30. The control unit 11 may notify the user by a predetermined sound in addition to the visual notification. Furthermore, an icon indicating the location of the speed measurement device 30 may be placed on the map M11.

31 and 32 are diagrams showing examples of animation images displayed in the information display area TA3. In FIGS. 31 and 32, the images of each frame are displayed in the order indicated by the arrows. When the rightmost frame image at the bottom of FIG. 31 is displayed, the leftmost frame image at the top of FIG. 32 is then displayed. When the rightmost frame image at the bottom of FIG. 31 is displayed, the leftmost frame image at the top of FIG. 32 is displayed again. As shown in FIG. 31, the animation image divides the image area into left and right halves using diagonal lines. The left area contains an image TA31 showing the road's surroundings, an image TA32 simulating a speed measuring device, and a target image TA33 surrounding image TA32 as a target. The right area contains an image TA34 showing the road's surroundings, an image TA35 simulating a speed measuring device, and a target image TA36 surrounding image TA35 as a target. As shown in Figures 31 and 32, in the animation images, as the speed measurement device is approached over time, target images TA33 and TA36 repeatedly expand and contract, periodically changing in size. After the speed measurement device is closest to the target, an image showing the speed measurement device as viewed from a position far away from the target is displayed. Then, an image showing the speed measurement device approaching over time is displayed again. While the pulsed light Lout is being received, an animation is displayed in which the images of each frame are displayed in the order described above. When the control unit 11 no longer detects the presence of the optical speed measurement device 30, it stops the notification immediately or after a predetermined time. This predetermined time is preferably three seconds. The first frame in the animation image may be an image showing the speed measurement device as viewed from a position far away from the speed measurement device.

<6-3. Radar system notifications>
In response to receiving microwave signals, the control unit 11 performs third notification control to notify the user of the presence of a radar-based speed measurement device. FIG. 33 illustrates an example of a notification screen displayed when the electronic device 10 receives light from a radar-based speed measurement device. As illustrated in FIG. 33 , this notification screen displays an icon I11 indicating the location of the vehicle 40, an icon I12 indicating the installation location of the radar-based speed measurement device, and information display areas TA4, TA5, TB1, and TB2, all superimposed on a map M11. The information display areas TB1 and TB2 are the same as the information display areas TB1 and TB2 described in FIG. 27 . The information display area TA4 displays the attributes of the speed measurement device and the status of the vehicle 40. The information display area TA4 displays the attributes of the speed measurement device, including "radar," which indicates that the speed measurement device is radar-based, a character string TA41 indicating a notification level corresponding to the strength of the radio waves from the speed measurement device, and an icon TA42 indicating that the speed measurement device is a radar-based speed measurement device. The information display area TA4 displays a character string TA43 (here, 88 km/h) indicating the current speed of the vehicle 40 as the status of the vehicle 40. The information display area TA5 is located in the lower left corner of the display screen. The information display area TA5 displays an animated image including an image that resembles a speed measuring device. The control unit 11 may notify the user by a predetermined sound in addition to the visual notification.

Figures 34 and 35 show an example of an animated image displayed in the information display area T5 of Figure 33. In Figures 34 and 35, the images in each frame are displayed in the order indicated by the arrows. After the rightmost frame image in the bottom row of Figure 34 is displayed, the leftmost frame image in the top row of Figure 35 is displayed. After the rightmost frame image in the bottom row of Figure 35 is displayed, the image returns to the leftmost frame image in the top row of Figure 34. As shown in Figures 34 and 35, the animated image includes an image TA51 showing the side of the road, an image TA52 simulating a speed measurement device, and a ring-shaped image TA53 simulating microwaves emitted from the speed measurement device. As shown in Figures 34 and 35, the animated image approaches the speed measurement device over time, and image TA53 repeatedly expands and contracts, periodically changing its size as it approaches the viewer. In the animated image, after the vehicle approaches the speed measurement device closest to the speed enforcement device, an image showing the speed measurement device as seen from a position far away from the device (see the frame surrounded by a dashed line) is displayed. The animated image then shows the vehicle approaching the speed enforcement device again over time. While the radar speed measurement device is being detected, an animation is displayed in which the images of each frame are displayed in the order described above. When the control unit 11 no longer detects the presence of a radar speed measurement device, it stops the notification immediately or after a predetermined time. This predetermined time is preferably three seconds. The period from when the presence of a speed measurement device is no longer detected to when the notification is stopped should be the same for optical and radar systems, but may also be different. The first frame in the animated image may be an image showing the speed measurement device as seen from a position far away from the device (see the frame surrounded by a dashed line).

Figure 36 shows the relationship between received microwaves (labeled "radar waves" in Figure 36) and notification methods. The control unit 11 identifies the received radar waves and controls the notification accordingly. As shown in Figure 36(a), radar waves include stealth waves, which are emitted only at the moment a specific stealth enforcement device measures them; conventional radar waves; new radar waves compatible with K-band and X-band; and a cancellation notification. The cancellation notification function automatically registers GPS location information when passing through a location that emits radio waves and causes a false alarm, such as an automatic door, and cancels the radar-based notification if radio waves are received the second or subsequent time the electronic device passes through. As shown in Figure 36(a), the control unit 11 changes the color of the light emitted by the light-emitting unit 23 depending on the notification level. Furthermore, as shown in Figure 36(b), the control unit 11 changes the notification sound (e.g., an electronic beep) emitted from the speaker 14 depending on the distance between the electronic device 10 and the microwave source.

<6-4. Notification regarding other speed measurement devices>
In addition, if a speed measurement device is detected, the control unit 11 displays an information display area corresponding to the detection method in the lower right corner of the notification screen. As shown in Fig. 37(a), in the case of an LH system, an information display area TA6 is displayed. As shown in Fig. 37(b), in the case of a loop coil, an information display area TA7 is displayed. The control unit 11 may also display animation images for other speed measurement methods, but may not display them for some or all methods.

<6-5. Collision warning notification>
As shown in FIG. 39( a), the electronic device 10 cooperates with the sensor device 90 to issue a collision warning. The collision warning is an example of a warning based on the positional relationship between the vehicle 40 and another vehicle, and is a function that warns that the vehicle may collide with another vehicle. The sensor device 90 has a function as a vehicle-to-vehicle sensor that detects the distance to another vehicle ahead. The vehicle-to-vehicle sensor detects the inter-vehicle distance using an infrared system and outputs the detected inter-vehicle distance to the electronic device 10. The sensor device 90 and the electronic device 10 are connected via wired or wireless communication. The control unit 11 performs a fourth warning control based on the positional relationship between the vehicle 40 and another vehicle. Here, the positional relationship is determined based on the inter-vehicle distance. The fourth warning control is a control that issues a collision warning.

Figure 38 shows an example of a notification screen for a collision warning. Figure 38(a) is a collision warning screen that issues a warning when a vehicle approaches a stopped preceding vehicle. On this screen, an icon I11 indicating the location of vehicle 40, an information display area TC11, and an information display area TC12 indicating the current speed are displayed on a map M11. Figure 38(b) is a departure warning screen that issues a warning when the preceding vehicle starts moving and vehicle 40 is stopped. On this screen, an icon I11 indicating the location of vehicle 40, an information display area TC21, and an information display area TC22 indicating the current speed are displayed on a map M11. Figure 38(c) is a close proximity warning screen that issues a warning when the distance between vehicle 40 and the preceding vehicle falls below a threshold while driving. On this screen, an icon I11 indicating the location of vehicle 40, an information display area TC31, and an information display area TC32 indicating the current speed are displayed on a map M11. When notifying the collision warning, the control unit 11 may not only display the above-mentioned screen but also provide a sound. The notification time may be, for example, 5 seconds, but may be any other time. As shown in Figure 38(d), the control unit 11 may change the sound depending on the content of the notification.

<6-6. Notification of warnings regarding distracted driving and drowsy driving>
The control unit 11 performs fifth notification control to notify the status of an occupant of the vehicle 40 based on an image captured by a camera capturing an image of the vehicle interior. The occupant is a person riding in the vehicle 40, and may be the driver, but may also be another occupant. As shown in FIG. 39( a), the electronic device 10 cooperates with a camera 70 to provide a notification regarding distracted driving and drowsy driving. The camera 70 captures images of the interior of the vehicle. The camera 70 detects the user's status based on the captured image and outputs information corresponding to the status to the electronic device 10. The camera 70 and the electronic device 10 are connected via wired or wireless communication. The camera 70 captures at least the user's face. The camera 70 detects the orientation of the user's face and the direction of their line of sight and notifies information corresponding to the detection results. The camera 70 is attached to the windshield 42, which is higher than the user's eye level, using a predetermined attachment member. The camera 70 may be attached to the rearview mirror 43, the dashboard 41, or another location.

As shown in Figure 39(b), the control unit 11 issues a distracted driving warning when the user's face is turned to the side by a predetermined angle from the front. Figure 40(a) is an example of a notification screen for a distracted driving warning. On this screen, an icon I11 indicating the location of the vehicle 40, an information display area TD11, and an information display area TD12 indicating the current speed are displayed on a map M11. Figure 39(c) is an example of a screen for warning about drowsiness at the wheel. When the user closes both eyes for approximately one second or more, the control unit 11 displays a notification screen for drowsy driving, as shown in Figure 40(b). On this screen, an icon I11 indicating the location of the vehicle 40, an information display area TD21, and an information display area TD22 indicating the current speed are displayed on a map M11. When the user closes both eyes for approximately three seconds or more... As shown in Figures 39(c) and 40(c), the control unit 11 changes the background color to display a notification screen for drowsy driving. On this screen, an icon I11 indicating the position of the vehicle 40, an information display area TD31, and an information display area TD32 indicating the current speed are displayed on a map M11. When issuing a warning regarding distracted driving or drowsy driving, the control unit 11 not only displays the warning on the screen as described above, but also issues a sound. As shown in Figures 39(c) and 41, the control unit 11 may change the sound associated with the warning depending on at least one of the length of time the eyes are closed and the number of times the warning has been issued.

<6-7. GPS warning>
Next, the GPS warning will be described. The GPS warning is a control that issues a warning when the position measured by the GPS receiver 16 is in a predetermined positional relationship with the notification object. The predetermined relationship may be when the vehicle and the notification object approach within a predetermined distance. The GPS warning may include the warning control described in <6-2. Notification Regarding Pulsed Light Lout (Mobile)>. Figure 42 is a diagram showing a GPS warning. Various notification methods are available depending on the settings. When the 1000m warning switch (default value) is set, the control unit 11 may display a warning screen from the standby screen when the vehicle is 1 km away from the notification object. When the 500m warning switch is set, the control unit 11 may display a warning screen from the standby screen when the vehicle is 500 km away from the notification object. When the fixed standby screen is set, the control unit 11 may display the standby screen regardless of the distance from the notification object.

In the case of a GPS warning, if the object to be notified is located at an angle of 25 degrees or more to the left or right of the front of the vehicle 40 relative to its traveling direction, the control unit 11 may issue a warning by adding a voice message indicating the direction of the object to be notified, such as "left direction" or "right direction." This makes it easier for the user to understand the direction of the object to be notified.

<6-8. Notification control>
The control unit 11 may display the animation image described above regardless of the location and time of the electronic device 10 when the pulsed light Lout is received, but may also change the animation image depending on at least one of the location and time. The animation image may be displayed using a photograph or a CG image of the site where the speed enforcement device is installed.

Figure 43 is a table explaining the notification control performed by the electronic device 10. In Figure 43, "◯" indicates a notification control that is permitted to be executed in parallel with the first or second notification control for notifying the presence of an optical speed measurement device, and "×" indicates a notification control that is not permitted. The control unit 11 may suspend the third notification control while the first or second notification control is being performed. In this manner, when notifying the presence of a speed measurement device 30, it is possible to prevent the presence of a radar-based speed measurement device from being notified. Furthermore, the control unit 11 may also prevent the presence of a speed measurement device of another type from being notified even if the presence of such a device is detected while the pulsed light reception notification screen is displayed. The other type may be a radar type, and microwave reception may be considered. If pulsed light has fewer false detections of speed measurement devices than radar waves, the accuracy of the speed measurement device notification is improved. Furthermore, if the presence of either speed measurement device is notified, the user will consciously drive safely, resulting in minimal inconvenience.

The control unit 11 may perform the fourth notification control in parallel with the first notification control or the second notification control. As shown in FIG. 44, the control unit 11 may perform a collision warning notification while the pulsed light reception notification screen is displayed. This is based on the idea that a collision warning is a high-priority warning. For example, when a collision warning is to be issued while the pulsed light reception notification screen is displayed, the control unit 11 displays the display shown in FIG. 44. In this example, information display areas TA1, TA2, and TC1 are displayed simultaneously. Note that the same may be performed for the departure warning, close approach warning, and lane departure warning. In this way, when a need for a collision warning notification arises, the control unit 11 can issue a collision warning even when the vehicle is approaching the speed measurement device 30.

The control unit 11 may be configured to stop the fifth notification control while the first notification control or the second notification control is being performed. The control unit 11 may be configured not to issue a warning regarding inattentive driving or drowsy driving while the notification screen for receiving pulsed light is being displayed. In this way, when a need arises for a collision warning, the control unit 11 can issue a collision warning even when a warning regarding the user's inattentiveness or drowsy driving should be issued.

The control unit 11 may perform the fourth notification control in parallel with the third notification control. When the presence of a radar-based speed measurement device is detected and the notification screen for that device is displayed, a collision warning is issued. This is based on the idea that a collision warning is a high-priority warning. For example, when the control unit 11 detects a radar-based speed measurement device and the notification screen is displayed, if a collision warning is to be issued, the control unit 11 displays the display shown in Figure 45. In this example, information display areas TA4, TA5, and TC1 are displayed simultaneously. Note that the same may be true for departure warnings, close approach warnings, and lane departure warnings. Meanwhile, the control unit 11 may stop the fifth notification control while the third notification control is being performed. In this way, when the presence of a speed measurement device 30 is notified, warnings regarding inattentive driving and drowsy driving can be avoided.

The notification control of the electronic device 10 may be based on relationships other than those shown in the table in FIG. 43. When a first event and a second event that require notification occur simultaneously, the control unit 11 may provide a notification for the first event with a higher priority while halting notification for the second event with a lower priority. This allows the user to more easily recognize the occurrence of the first event with a higher priority. The control unit 11 may also provide a notification for both the first event and the second event simultaneously. This allows the user to recognize information about both the first event and the second event. The control unit 11 may also provide a notification for the occurrence of three or more events simultaneously. The control unit 11 may also set the notification periods for the first event and the second event to be the same, but may also set them to be different. The combination of the first event and the second event may be predetermined, such as during the design stage, or may be user-configurable. Furthermore, when two or more notification controls are performed in parallel, the display notifications may be performed in parallel, but at least one of the sound notifications may be stopped.

Furthermore, it is preferable that the electronic device 10 not issue an alert using either or both of the optical and radar methods when the speed of the vehicle 40 is below a predetermined speed. This is because there are relatively few safety issues when the vehicle 40 is traveling at the predetermined speed, making an alert unnecessary. However, it is preferable that the electronic device 10 issue an alert using either or both of the optical and radar methods when the vehicle 40 is traveling on a predetermined type of road, such as a green belt. The predetermined speed may be, for example, 30 km/h, but may be any other speed. In this way, depending on the location of the vehicle 40, if an alert is required to notify the presence of the speed measurement device 30, this can be issued even if the speed of the vehicle 40 is below the predetermined speed.

Furthermore, it is preferable that the electronic device 10 has a cancellation function compatible with the radar system, but does not have a cancellation function compatible with the optical system. This is because the optical system is thought to be less susceptible to false alarms that can occur with the radar system.

Furthermore, the electronic device 10 may notify the content and timing of information regarding the notification object according to the tables shown in Figures 46 to 48.

7. Mechanism of Electronic Device 10
FIG. 49 is a perspective view showing an example of the external configuration of the electronic device 10. FIGS. 50 and 51 are six-sided views showing an example of the external configuration of the electronic device 10. FIG. 50 shows a front view, a top view, a right side view, a bottom view, and a left side view of the electronic device 10. FIG. 51 shows a rear view of the electronic device 10. In this example, the housing 100 of the electronic device 10 is divided into a first housing 1001 located on the front side and a second housing 1002 located on the rear side. The front side of the first housing 1001 is provided with a display unit 13, a light-emitting unit 23, and an illuminance sensor 201 of the sensor unit 20. The display area of the display unit 13 is located in an opening on the front side of the first housing 1001. A speaker 14 is provided to output sound from the top surface of the second housing 1002. The right end surface of the housing 100 is provided with an insertion section 21 (i.e., an SD card slot) for inserting an SD card. The light receiving unit 12 is provided in the upper right part of the rear surface of the housing 100. In addition, the power switch 221 and DC jack 222 of the power supply unit 22 are provided in the lower left part of the rear surface of the housing 100.

As shown in FIG. 51 , a lid portion 1003 is provided on the back surface of the second housing 1002. The lid portion 1003 is located in a position closer to the upper right of the second housing 1002 when viewed from the back surface. The lid portion 1003 is a detachable cover for the second housing 1002, and is a member that is longer in the left-right direction than in the up-down direction. The lid portion 1003 is a light-transmitting portion formed of a material that transmits at least the pulsed light Lout. The lid portion 1003 is preferably formed of the same material as the housing 100, but may be formed of a different material. The lid portion 1003 is formed of resin or other material. The lid portion 1003 is preferably formed of a material that blocks visible light and preferably functions as a visible light cut filter, but this is not required. The lid portion 1003 may be a translucent or transparent member. Alternatively, instead of the lid portion 1003, a light-transmitting portion that transmits at least the pulsed light Lout may be formed on the back surface of the housing 100.

Figure 52 is a rear view showing the second housing 1002 with the lid 1003 removed. As shown in Figure 52, the second housing 1002 has a first window 101 and a second window 102 formed therein. The first window 101 and the second window 102 are openings for guiding external light into the interior of the housing 100. However, the first window 101 and the second window 102 may have a component such as a lens that transmits at least light of a specific wavelength. The first window 101 and the second window 102 are arranged with a predetermined distance between them in the left-right direction. The first window 101 and the second window 102 are circular, but may have other shapes. Pulsed light enters the interior of the housing 100 through the first window 101 and the second window 102. If the lid 1003 is made of a translucent or transparent material, the user can see the first window 101 and the second window 102. This may have an appealing design effect.

Figure 53 is an exploded perspective view of the electronic device 10. As shown in Figures 53(a) and (b), the housing 100 of the electronic device 10 contains, in order from the first housing 1001 side, a display unit 13, a first substrate 1010, and a second substrate 1030. The first substrate 1010 is a rectangular substrate that is longer horizontally than vertically in a plan view. The display unit 13 is mounted on a first surface on the front side of the first substrate 1010. A control circuit 1331 is mounted on the first surface of the first substrate 1010. The control circuit 1331 may be configured to implement some or all of the functions of the control unit 11. The control circuit 1331 may be, for example, an integrated circuit (IC). While one control circuit 1331 is shown here, it may be replaced with two or more control circuits. A microwave receiving unit 15 is mounted on a second surface opposite the first surface of the first substrate 1010. The microwave receiving unit 15 is approximately rectangular in shape. The second housing 1002 houses these components and is screwed to the first housing 1001.

Figure 54 is a rear view showing the electronic device 10 with the second housing 1002 removed. Figures 55, 56, and 57 are perspective views showing the internal configuration of the electronic device 10 in this state. The second substrate 1030 is arranged on the rear side of the first substrate 1010 so as to overlap the first substrate 1010. The second substrate 1030 is an approximately L-shaped substrate in a planar view. The second substrate 1030 has this shape because the area where the microwave receiving unit 15 is located is cut out. This configuration reduces the increase in thickness of the electronic device 10 compared to when the second substrate 130 overlaps the microwave receiving unit 15. The light receiving unit 12 is mounted in the first region Ar3 of the second substrate 1030, which is long in the vertical direction. The first wavelength selection unit 121 and the first light receiving element 122 are provided facing the first window 101. A second wavelength selection unit 123 and a second light receiving element 124 are provided facing the second window 102.

The first wavelength selection unit 121 and the first light receiving element 122, as well as the second wavelength selection unit 123 and the second light receiving element 124 facing the second window 102, are housed in a shielding case 1031. The shielding case 1031 is formed, for example, from a conductive material (e.g., metal) and is a component designed to prevent the elements of the light receiving unit 12 from generating noise due to the influence of external electromagnetic waves. The source of the electromagnetic waves is an electrical component, such as a drive unit that drives the wipers installed on the vehicle 40. The shielding case 1031 has a partition wall separating the space housing the first light receiving element 122 from the space housing the second light receiving element 124. This partition wall also prevents the propagation of pulsed light. In this way, the signals output by the first light receiving element 122 and the second light receiving element 124 are less susceptible to electromagnetic noise than if they were not shielded with a conductive material. Furthermore, the presence of the partition reduces the likelihood that light transmitted through the first wavelength selection section 121 will be received by the second light receiving element 124, and that light transmitted through the second wavelength selection section 123 will be received by the first light receiving element 122.

The GPS receiver 16 and speaker 14 are mounted in the second region Ar4 of the second circuit board 1030. The second region Ar4 is shorter in the vertical direction than the first region Ar3 and protrudes upward more than the first region Ar3. The GPS module is mounted on the first surface of the GPS receiver 16, facing the front, and the GPS antenna is mounted on the second surface of the GPS receiver 16, facing the rear. The GPS antenna is positioned above the microwave receiver 15 to ensure upward directivity. Furthermore, to ensure space for the GPS receiver 16, the second region Ar4 of the second circuit board 1030 protrudes upward more than the first region Ar3. The microwave receiver 15 is located below the GPS receiver 16 and speaker 14. The mounting section 21 is mounted on the left side of the first circuit board 1010. The power switch 221, DC jack 222, and button battery 223 of the power supply 22 are provided below the mounting section 21. The button battery 223 is an internal power source for the electronic device 10. In addition, the wireless module 171 of the communication unit 17 is mounted on the front side of the second substrate 1030, opposite the first area Ar3.

Figure 58 shows a photograph of the second board 1030. Figure 58(a) is a view from the back side, and Figure 58(b) is a view from the front side. In Figure 58(a), the GPS receiving unit 16 is mounted in the area marked "(16)," and the speaker 14 is mounted in the area marked "(14)." The light receiving unit 12 is mounted in the area surrounded by a white line on the second board 1030. Figure 59 shows the electrical configuration of the light receiving unit 12. In this case, the first light receiving element 122 is photodiode PD1. Light that has passed through the first wavelength selection unit 121 is incident on the light receiving surface of photodiode PD1. The cathode of PD1 is connected to the high-potential power supply line, and the anode is connected to one end of resistor R1. The other end of resistor R1 is grounded. The input terminal of amplifier IC1 (1/2) is commonly connected to the anode of photodiode PD1 and one end of resistor R1. The output terminal of amplifier IC1(1/2) is connected to the negative input terminal of the differential amplifier AMP. The second light receiving element 124 is a photodiode PD2. Light passing through the second wavelength selection unit 123 is incident on the light receiving surface of photodiode PD2. The cathode of photodiode PD2 is connected to the high-potential power supply line, and the anode is connected to one end of resistor R2. The other end of resistor R2 is grounded. The input terminal of amplifier IC1(2/2) is commonly connected to the anode of photodiode PD2 and one end of resistor R2. The output terminal of amplifier IC1(2/2) is connected to the positive input terminal of differential amplifier AMP. Amplifiers IC1(1/2) and IC1(2/2) halve their outputs. A signal corresponding to the difference between the amounts of light received by photodiodes PD1 and PD2 is output from the output terminal of differential amplifier AMP. The control unit 11 detects the speed measurement device 30 based on this difference. The control unit 11 detects the speed measurement device 30 based on the signal after it has been amplified by the differential amplifier AMP, and then passed through amplifier Q1 and amplifier IC2 (2/2) and waveform shaped.

Figure 60 is a graph showing an example of the filter characteristics of the first wavelength selection unit 121 and the second wavelength selection unit 123. Here, the first wavelength selection unit 121 is a band-pass filter. As shown in Figure 60(a), it transmits light in a wavelength range that includes a specific wavelength λout of 905 nm, which is the target wavelength, and blocks light in other wavelength ranges. The width of the wavelength range through which light is transmitted is, for example, 20 nm, but it is more desirable that it be narrower than this. The second wavelength selection unit 123 is, for example, a band elimination filter. As shown in Figure 60(b), the second wavelength selection unit 123 blocks light in a wavelength range that includes the specific wavelength λout, and transmits light in other wavelength ranges that are non-target wavelengths. The width of the wavelength range through which light is blocked is, for example, 20 nm, but it is more desirable that it be narrower than this.

In Figure 60, the transmittance in the frequency range where light passes is greater than 80%, and the transmittance in the frequency range where light is blocked is less than 15%, but any transmittance that is practically tolerable for each is sufficient. It is desirable for the wavelength selection section to exhibit a steep characteristic as exemplified in Figure 60, but it may also exhibit a broader characteristic.

When the second substrate 1030 is further removed from the electronic device 10, the state shown in Figure 61 is obtained.

[8. Other Examples of Electronic Devices]
FIG. 62 is a perspective view showing the external configuration of electronic device 80, which is another example of an electronic device. FIG. 63 is a perspective view showing the external configuration of electronic device 80 as viewed from the right front side with respect to the direction of travel of the vehicle. As shown in FIGS. 62 and 63 , electronic device 80 is a box-shaped device having a substantially rectangular parallelepiped shape. Electronic device 80 does not have a display unit 13 and outputs various signals to external devices via a wired cable 81. Electronic device 80 may also communicate with external devices via a wireless communication path. Electronic device 80 is divided into a first housing 801 located at the top and a second housing 802 located at the bottom. A lid 803 is provided on the front side of electronic device 80. Like lid 1003, lid 803 is a light-transmitting member made of a material that transmits pulsed light.

Figures 64, 65, and 66 are perspective views showing the internal configuration of electronic device 80. As shown in Figures 63 to 65, inside electronic device 80, first substrate 810, second substrate 820, and third substrate 830 are arranged from bottom to top at a distance from each other. Button battery 811 is provided on first substrate 810 and serves as the internal power source for electronic device 80. What distinguishes it from conventional electronic devices is that light receiving unit 841 is formed on fourth substrate 840 so as to receive pulsed light from the front side in the vehicle's direction of travel, and antenna unit 850 of the microwave receiving unit is located adjacent to it. Light receiving unit 841 may have the same configuration as light receiving unit 12 and is electrically connected to fourth substrate 840. Fourth substrate 840 is electrically connected to first substrate 810 via a terminal (not shown). Antenna unit 850 is the portion of the microwave receiving unit that functions as an antenna. Antenna unit 850 is configured using a predetermined pattern formed on a substrate. The processing circuit 851 of the microwave receiving unit, which processes signals from the antenna unit 850, is mounted on the second board 820. The GPS receiving unit 860 is mounted above the third board 830. With this configuration, the electronic device 80 performs notification control, outputting notifications using sound or display to an externally connected output destination (e.g., a conventional laser detector) via cable 81 to notify the user of information. This notification function may be the same as that of the electronic device 10. The antenna unit 850 is disposed adjacent to the fourth board 840. It is preferable that the normal direction of the antenna unit 850 and the normal direction of the fourth board 840 intersect, but it is particularly preferable that they be parallel.

In this way, it is possible to provide technology for notifying users of the presence of a speed measurement device while minimizing changes to existing systems.

9. Noise Reduction Method
If the noise source is the light-receiving unit 12 circuit itself, reducing the amplifier gain to lower the noise floor is an effective method. In contrast, improving the C/N ratio in the light-receiving unit allows for increased amplifier gain, which is desirable. Noise can originate from the amplifier circuit itself, which is random noise. The amplifier circuit refers to the circuitry rather than the photodiode. Therefore, to suppress noise, it is advisable to adopt a configuration in which the output of the light-receiving unit 12 is routed to two amplifier circuits (amplifier circuit 1 and amplifier circuit 2). In this example, as shown in Figure 67, if the noise peak exceeding the threshold Th of amplifier circuit 1 is designated as peak N1, the peak of the signal generated when pulsed light is received is designated as peak P1, and the noise peak exceeding the threshold Th of amplifier circuit 2 is designated as peak N2, and the signal generated when pulsed light is received is designated as peak P2, the probability that N1 and N2 coincide in time is extremely low, and P1 and P2 do coincide. Therefore, if simultaneous detection of both N1 and N2 is considered to be the reception of pulsed light, noise reduction is reduced and detection accuracy is thought to be improved. As shown in Fig. 67, if there is a difference in the peak values exceeding the thresholds of the two circuits by setting (P1 + P2)/2, the peak value can be reduced by adding them and dividing by 2. A comparator may be used to determine whether there is such a difference in peak values.

In this embodiment, since amplifier Q1 is the source of noise, it is preferable to replace amplifier Q1 with an amplifier in circuit 1, an amplifier in circuit 2, and a circuit that halves their outputs. An integrating circuit may also be provided in the circuit of light receiving unit 12. Alternatively, circuit 1 may be integrated with an integrating circuit using a capacitor or the like, while circuit 2 may remain unchanged and a comparator may be provided.

10. Other Embodiments
(10-1) The electronic device 10 may be a system that issues an alarm when it detects a reflective pattern that resembles the presence of a police officer. The reflective pattern is a pattern of reflective material that is placed at a predetermined location where a police officer is likely to be present. This pattern may be a pattern used on a predetermined sign or police uniform. The electronic device 10 may use the on-board camera 50 to acquire and analyze an image of the area ahead of the vehicle 40 to detect the presence of a predetermined reflective pattern. In this way, the presence of a police officer can be reported in a location where the police officer is likely to be present, reducing the possibility of false alarms. The alarm may be issued by a visual, an audible, or a combination of these.

(10-2) In (10-1), the warning may be a speed enforcement warning. The speed enforcement warning may be a warning that the vehicle is approaching a speed enforcement point.

(10-3) The pattern of the reflective material that gives the appearance of the police officer being detected should include at least two of the following: a horizontal line corresponding to the position of a person's waist, a vertical line corresponding to a baton, a line corresponding to the horizontal position of a helmet, a line corresponding to a sash, and a line corresponding to the V-shape of a vest. For example, it is particularly desirable to detect lines in the order of diagonal, horizontal, and vertical from the top.

(10-4) The electronic device 10 may detect the reflective material pattern that gives the appearance of a police officer based on the detection of a reflection level equivalent to retroreflective tape.

(10-5) The electronic device 10 may suppress detection of a reflective material pattern that would make it appear as if a police officer is present at a height higher than the height of a person. A suppression method may be to prevent detection of parts above a certain height in advance. Furthermore, even if the pattern is detected, it may not be detected if it is above a certain height. It may also be a condition that all components of the reflective material pattern are included within the vertical height of a person (for example, within 2 m).

In (10-5), the electronic device 10 should also exclude locations that correspond to the road surface to prevent misidentification of stop lines on the road. Stop lines on the road are excluded because they consist of vertical and horizontal lines and can produce the same amount of light as retroreflections.

(10-6) The electronic device 10 may store location information for locations where reflective patterns that give the appearance of police officers have been installed in advance, and may be configured to suppress the alarm at those stored locations.

(10-7) The electronic device 10 may change the manner of the warning depending on the number of reflective material patterns that appear to indicate the presence of a police officer. For example, when one reflective material pattern that appears to indicate the presence of a police officer is detected, a police enforcement warning may not be issued, but when multiple reflective material patterns that appear to indicate the presence of a police officer are detected, a police enforcement warning may be issued.

(10-8) The electronic device 10 may suppress the alarm if only one reflective material pattern that appears to indicate the presence of a police officer is detected within a predetermined time period. The electronic device 10 may decide whether to issue an alarm based on the number of detections within a predetermined time window. The predetermined time period may be approximately 2 seconds.

(10-9) The electronic device 10 may detect the reflective material pattern that appears to indicate the presence of a police officer based on a video signal captured by a camera installed in a drive recorder. This may be possible from a distance greater than the detection range of pulsed light.

(10-10) The electronic device 10 should not detect reflective patterns that may indicate the presence of police officers behind the vehicle, and should not detect them in the passing lane ahead of the vehicle, but should instead detect them to the left of the driving lane.

(10-11) The electronic device 10 has a function to sound an alarm when it detects electromagnetic waves (e.g., pulsed light or microwaves) for measuring the speed of a vehicle traveling on a road, and even if it detects a pattern of reflective material that looks like a police officer, if it detects electromagnetic waves for measuring the speed of a vehicle traveling on the road, it is preferable to give priority to the alarm when it detects electromagnetic waves for measuring the speed of a vehicle traveling on the road, and suppress the alarm when it detects a pattern of reflective material that looks like a police officer.

(10-12) The electronic device 10 has a function to sound an alarm when it detects electromagnetic waves for measuring the speed of a vehicle traveling on a road, and when it detects a pattern of reflective material that resembles the presence of a police officer and also detects electromagnetic waves for measuring the speed of a vehicle traveling on a road, it should sound an alarm different from the alarm sounded when the electromagnetic waves are detected alone (in particular, it should sound an alarm indicating a higher level of urgency).

(10-13) The electronic device 10 may be equipped with an infrared detection device for detecting the presence or absence of objects, and may also be equipped with a function to determine (guess) the type of enforcement based on the detection of reflective material patterns that resemble the presence of police officers. If there is no person and reflective material, it is likely that it is just an Orbis speed camera. If there is a person and reflective material, it is likely that it is a wide range of enforcement, including an Orbis speed camera. The control unit 11 may issue a notification based on the results of this type determination. The notification may be issued using different displays and/or sounds.

(10-14) When the electronic device 10 recognizes a moving object that matches the pattern of a night police officer, it should determine that it is a police officer rather than a night police sign. The control unit 11 cancels the vehicle's behavior when making the calculation.

(10-15) The electronic device 10 should have a function to suppress (e.g., not execute) night police warnings during the day (or when it is bright). In particular, it is recommended that the device not even perform recognition processing for night police signs.

11. Other Embodiments
Further, other embodiments will be described. The section [11. Other embodiments] may include configurations based on ideas common to the matters described in other sections.

The electronic device 10 may have a protruding portion used to receive pulsed light from the speed measurement device 30. For example, the electronic device 10 may have a portion where at least a portion of the light receiving unit 12 is provided that protrudes more than other portions. Specific embodiments of such a configuration are described below.

(11-1) The electronic device 10 may have a light incident section at a position that protrudes forward from the rear or side of the housing in the direction of travel of the vehicle (e.g., the normal direction of the display screen of the display section). The incident section is the part of the electronic device 10 where light is incident to be received by the light receiving section. The incident section is a part that is included in the exterior of the electronic device 10. For example, the part of the electronic device 10 where the above-mentioned cover section 1003 is provided is the incident section, and the part where the first window 101 or the second window 102 is provided is also the incident section.

By doing this, light can be received further forward, making it less susceptible to obstacles that block the laser light. In particular, when the configuration is such that light is received after passing through the windshield, the influence of light from the speed measuring device 30 that is refracted by the windshield can be reduced by installing the incident unit closer to the windshield. In particular, when this configuration is used when the display unit and light receiving unit are integrated into a housing, installation inside the vehicle is simple and easy, and the above-mentioned influence can be reduced.

In the example of Figure 68 (a), the rear surface 1004 of the housing 100 of the electronic device 10 is provided with a first portion 10041 and a second portion 1042 that protrudes forward from the first portion 1041 in the direction of travel of the vehicle. The first portion 1041 is flat. The second portion 1042 here has a hemispherical shape. Part or all of the second portion 1042 corresponds to the incident portion.

The second portion 1042 may be located, for example, above the vertical center of the rear surface 1004. Compared to a location below, the second portion 1042 may be less susceptible to the influence of obstacles blocking the light from the speed measurement device 30. The second portion 1042 is located to the right of the horizontal center of the rear surface 1004 when viewed from the rear side in the direction of travel of the vehicle (preferably the side where the passenger compartment is located). Alternatively, the second portion 1042 may be located to the left of the horizontal center of the rear surface 1004 when viewed from the rear side in the direction of travel of the vehicle. In this case, the incident portion will be located closer to the speed measurement device 30, on the left side in the direction of travel of the vehicle, which may be desirable from the perspective of light reception.

(11-2) The electronic device 10 may have an incident portion protruding from the rear or side of the housing to the left of the vehicle's traveling direction (or in a direction parallel to the display screen of the display portion).

(11-3) The electronic device 10 may have an incident section protruding from the rear or side of the housing to the front left in the direction of travel of the vehicle (or to the left in a direction intersecting the normal to the display screen of the display section 13). In this case, the incident section should have a surface whose normal direction is diagonally left.

In the example of Figure 68 (b), a first portion 1041 and a second portion 10042A that protrudes forward and to the left in the direction of travel of the vehicle are provided on the rear surface 1004A of the housing of the electronic device 10. In this case, the second portion 1042A is prismatic. Part or all of the surface 1043 at the tip of the second portion 1005B corresponds to the incident portion. The surface 1043 is not parallel to the first portion 1041, but faces obliquely with respect to the direction of travel of the vehicle. In this case, the incident portion is located closer to the speed measurement device 30, on the left side in the direction of travel of the vehicle, which may be desirable from the perspective of light reception.

Surface 1043 may be, for example, a flat surface, but may also include a curved portion facing forward and left (for example, the curved surface may be an arc or sphere). The position at which second portion 1042A is provided on rear surface 1004A can be varied in various ways, similar to the position at which second portion 1042 is provided on rear surface 1004.

Under this configuration, at least one of the light receiving elements of the light receiving unit 12 may be provided inside the second portion 1042A and may be arranged facing the direction in which the surface 1043 faces.

In the configurations (11-1) to (11-3), the length in the protruding direction of the portion protruding from the rear surface of the housing (e.g., second portion 1042, 1042A) may be smaller or larger than the thickness of the housing of the electronic device 10. In the example of FIG. 69(a), the rear surface 1004B of the housing 100 of the electronic device 10 is provided with a first portion 1041 and a second portion 1042B that protrudes forward in the direction of travel of the vehicle relative to the first portion 1041. The length in the protruding direction of the second portion 1042B is smaller than the thickness of the housing. In the example of FIG. 69(b), the rear surface 1004C of the housing 100 of the electronic device 10 is provided with a first portion 1041 and a second portion 1042C that protrudes forward in the direction of travel of the vehicle relative to the first portion 1041. The length in the protruding direction of the second portion 1042D is larger than the thickness of the housing.

In the configurations (11-1) to (11-3), the portion protruding from the rear surface of the housing may be rectangular, cubic, cylindrical, or other columnar. The surface at the tip of this protruding portion may be flat, inclined relative to the surface of the first portion 1041, curved, or have any other shape. At least a portion of the protruding portion may be semi-cylindrical, spherical, triangular prism-shaped, lens-shaped, prism-shaped, or the like, to change the optical path or provide light focusing. A sensor may be provided at the destination of the optical path change or light focusing.

(11-4) The incident section may be provided separately from the housing 100. The incident section may be provided in a location that is in physical contact with the housing 100, or in a location that is not in physical contact with the housing 100. For example, the incident section may be configured so that light incident on the incident section is received by the light receiving section, and a signal corresponding to the received light is supplied to the control section 11. In this way, even if there are restrictions on changing the position or orientation of the housing 100, for example, from the perspective of making the display section 13 easier to see, the position or orientation of the incident section can be adjusted to make it easier to receive light from the speed measurement device 30.

The electronic device may include a connector for connecting wiring that outputs a signal in response to light received from the "separate device," and the control unit may perform notification control based on the signal in response to light received that is input via the connector.

As a "separate part" in (11-5) and (11-4), the incident portion may be provided on a mounting member that is attached to the vehicle. In this case, the mounting member may be provided at the position of the incident portion in (11-1) to (11-3). In this case, the mounting member may be attached to the housing by adhesive, fasteners, or other methods.

(11-6) It would be a good idea to use a drive recorder as a "separate entity" from (11-4).

The "separate element" in (11-7) and (11-4) may be a mounting portion for the drive recorder. This mounting portion is a portion for mounting the drive recorder to a predetermined mounting location on the vehicle. The mounting portion is, for example, a portion that is physically connected to the drive recorder and may include, for example, a portion that makes surface contact with the mounting location. The mounting member is, for example, one that is mounted to the windshield of the vehicle and may have an incident portion on the mounting surface side of the windshield.

(11-8) The configuration is not limited to one in which the housing has a function for performing notification control, and the housing may also have a drive recorder function.

(11-9) The incident section may be configured to be detachable from the housing. For example, the housing may be provided with a mounting section for mounting the incident section. The mounting section may be provided with a fixing section for fixing the incident section.

(11-10) It is preferable to provide an adjustment means for adjusting the orientation of the incident part relative to the housing. The adjustment means should have a structure similar to that used to adjust the orientation of the camera in a mirror-type drive recorder. Alternatively, the housing may be equipped with a camera, and the orientation of the camera and incident part may be adjusted independently.

(11-11) In the electronic device 10, when the control unit 11 determines that light from the speed measurement device 30 has been received, it is preferable to record the video and values of various sensors before and after that. The control unit 11 may also record information on whether the area in which the vehicle is located is within a specified area, such as within the zone 30.

(11-12) In the electronic device 10, the control unit 11 may record setting information related to notifications (e.g., alarms) issued when light from the speed measurement device 30 is received, along with the location information, etc.

(11-13) In a configuration in which the electronic device 10 executes notification control when it receives a predetermined radio wave (e.g., microwave), the incident portion may be positioned forward of the microwave receiving portion 15 in the direction of travel of the vehicle. Here, "positioned forward" means that the incident portion protrudes forward of the microwave receiving portion 15.

(11-14) In a configuration in which the electronic device 10 executes notification control when location information acquired from the GPS receiver 16 satisfies predetermined conditions, the incident unit may be positioned further forward in the vehicle's direction of travel than the GPS receiver 16. Here, "positioned further forward" may mean that the incident unit protrudes further forward than the microwave receiver 15. Here, the predetermined condition may be that the current location indicated by the location information acquired from the GPS receiver 16 and the location indicated by the location information stored in the memory unit 18 are in a predetermined proximity relationship.

(11-15) In a configuration in which the electronic device 10 includes the light-emitting unit 23 or other light-emitting units, the incident unit may be provided on the surface opposite to the surface on which the light-emitting unit is provided. If the light-emitting unit is provided on the front side of the housing 100, the light-emitting unit may be provided on the back side.

(11-16) The portion where light enters to obtain the second received light amount corresponding to the second window 102 (hereinafter referred to as the "second incident portion") may be provided within the protruding portion where the incident portion is provided. In this case, the second incident portion may be provided within the protruding portion where the incident portion is provided, in the same orientation as the incident portion. The second incident portion may be provided within the protruding portion where the incident portion is provided, in a different orientation from the incident portion.

(11-17)
The second incident portion may be provided in a portion of the housing different from the protruding portion where the incident portion is provided. The second incident portion may be provided in the protruding portion where the incident portion is provided, in the same orientation as the incident portion. The second incident portion may be provided in the protruding portion where the incident portion is provided, in a different orientation from the incident portion.

(11-18)
When the control unit 11 of the electronic device 10 determines that pulsed light has been received in a predetermined proximity relationship with at least one of the zone 30, a one-lane road, a school, a kindergarten, or a nursery school, it is preferable to increase the possibility that the device is the speed measurement device 30 or decrease the possibility that the device is the source of a false alarm. The zone 30 is an area where a speed limit of 30 km/h is enforced in order to restrict the driving speed of vehicles within the area and the passage of vehicles through the area.

Optical speed measurement devices come in two types: portable and fixed to the side of the road or on the road. Portable devices are often carried and installed somewhere in these locations at irregular intervals for measurements, requiring drivers to be extra careful. However, this method makes it possible to more reliably issue alerts in these locations. Furthermore, even if the possibility of false alarms increases in these locations, the inventors have found that because these locations require particular caution regarding accidents, drivers can still be made aware of safety in these locations, even if the possibility of false alarms increases.

(11-19) When the control unit 11 of the electronic device 10 determines that it is at least one of a predetermined time period such as late at night, predetermined weather such as bad weather, or the vehicle is traveling on a predetermined road such as a multi-lane road, it may increase the likelihood that it is a speed measurement device 30 or decrease the likelihood that it is a source of a false alarm.

The inventors have found that portable types of vehicles often do not perform measurements in such situations due to the increased likelihood of erroneous measurements. This approach can reduce false alarms in particular in such situations. In particular, in such situations, there is a greater likelihood that light from other vehicles' headlights will be incident on the light receiving unit, either directly or indirectly due to diffuse reflection, increasing the likelihood of false alarms. However, this approach can also reduce such problems.

(11-20) The second light receiving element 124 may be used to detect the state of light other than that from the speed measurement device 30. The control unit 11 of the electronic device 10 may detect the state of light other than that from the speed measurement device 30 based on the light received by the second light receiving element 124. The control unit 11 may, for example, have a function to change the brightness of the screen/light emitter (LED, etc.) depending on the amount of ambient light, a function to switch the screen between daytime display and nighttime display, and detect whether the vehicle is traveling through a tunnel or whether the wipers are operating. Whether the wipers are operating may be detected based on the periodicity of light obstruction, such as whether the wipers are in high or low position.

In this way, if the electronic device 10 has a function for detecting the lighting conditions around the electronic device 10 and performing control based on the detection results, there is no need to provide a separate sensor for detecting the lighting conditions around the electronic device 10, which reduces costs and makes it easier to make the device (housing) smaller.

(11-21) It has already been explained that it is preferable for the light receiving unit to be located outside the vehicle and for the part that realizes the notification control function to be located inside the vehicle, but it is also preferable to do the following. The light receiving unit should be located near the front of the vehicle within the range of the vehicle's wheel height (particularly within the range of the license plate height). The light receiving unit may be located in a camera installed outside the vehicle cabin to capture images of the front or left front of the vehicle (this should include part of the left side), or it may be configured so that it can be installed adjacent to the camera. It is preferable that the image captured by the camera and the signal corresponding to the light received by the light receiving unit can be routed using a single cable. In this case, it is preferable that both signal lines be housed within the same sheath.

(11-22) The light receiving unit should be located in the vehicle cabin forward of the driver's seat and at a height that is the same as the height range of the components through which light passes from outside the vehicle cabin to inside the cabin. This reduces the possibility of light being blocked by the wipers on sunny days, allowing for more reliable detection.

The light receiving unit should preferably have a means for installing it in a position that does not overlap the initial position of the wipers as viewed from inside the vehicle. The light receiving unit should preferably be installed as low as possible on the vehicle. This reduces the obstruction of forward visibility while driving and reduces the possibility of light from the speed measurement device 30 being blocked, allowing for more reliable detection by the speed measurement device 30. The light receiving unit should be located, for example, at the license plate position. The light receiving unit should be placed on the left side of the vehicle when facing the direction of travel. Light from the speed measurement device 30 is emitted diagonally toward the vehicle from the sidewalk on the left, reducing the possibility of it being cast in the shadow of a preceding vehicle. In particular, when a preceding vehicle is traveling a few meters ahead of the vehicle, this reduces the possibility that the light emitted diagonally toward the vehicle from the sidewalk on the left will be blocked by the preceding vehicle, preventing detection. This also reduces the chance of the light from the speed measurement device 30 being detected or not, which can occur when the distance between the vehicle and the preceding vehicle fluctuates.

The control unit 11 of the electronic device 10 may issue a notification that it will be difficult to receive light from the speed measurement device 30 when the distance to the preceding vehicle is within a predetermined proximity range. The control unit 11 may change the sensitivity of receiving light from the speed measurement device 30 depending on whether the distance to the preceding vehicle is within a predetermined proximity range or not. For example, the sensitivity may be increased when the distance to the preceding vehicle is within a predetermined proximity range compared to when the distance is not within a predetermined proximity range.

(11-23) The control unit 11 determines that the light is from an object to be notified when the light pattern matches or is similar to the light pattern emitted from the speed measurement device 30. It may also determine that the light is not from an object to be notified when the light pattern does not match or is not similar to this pattern. The light pattern emitted from the speed measurement device can be determined using program logic. Information about the light pattern can be stored in advance in a storage means (for example, storage example 1: parameters (11-24) to (11-26) below, storage example 2: information about the degree of change in the amount of light over time (11-24) to (11-26) below, etc.), and a determination can be made as to whether the light is similar to the stored pattern.

(11-24) The control unit 11 of the electronic device 10 may determine that the speed measurement device 30 is present when it receives light that changes between on and off at predetermined time intervals (for example, every few tens of microseconds). The control unit 11 may not determine that the speed measurement device 30 is present when it receives light other than this. In this case, the on time may be, for example, on the order of nanoseconds, and the off time may be on the order of few tens of microseconds.

When the control unit 11 of the electronic device 10 detects that the light is on for a predetermined on-time (for example, a very short time) and off for a longer predetermined off-time (much longer than the very short time) and repeats this cycle periodically, it may determine that the light is from the speed measurement device 30. If the light is anything other than this, the control unit 11 of the electronic device 10 may determine that the light is not from the speed measurement device 30.

(11-25) The control unit 11 of the electronic device 10 may determine that a speed measurement device 30 is present when light is received whose amount of light changes periodically (for example, swept horizontally (left and right)) at predetermined time intervals (for example, approximately tens to hundreds of ms). The control unit 11 may not determine that a speed measurement device 30 is present when light other than this is received.

(11-26) In the configurations (11-24) to (11-25), the control unit 11 may determine that the speed measurement device 30 is present based on light received at multiple timings. For example, if the control unit 11 determines that the speed measurement device 30 is present based on light received at multiple predetermined timings, the control unit 11 ultimately determines that the speed measurement device 30 is present.

(11-27) An electronic device for a vehicle (e.g., an alarm device) may have an antenna unit and a display unit housed in separate housings, the antenna unit electrically connected to the display unit, and the display unit performing predetermined notification control (e.g., issuing a warning) based on a signal received by the antenna unit. The light receiving unit may be housed in the housing of the antenna unit or in a housing separate from the housing of the antenna unit and the housing of the display unit, and the display unit may have the function of issuing a notification (e.g., issuing a warning) regarding optical vehicle speed measurement based on a signal regarding the light reception state of the light receiving unit from the housing containing the light receiving unit. The antenna unit may be either or both of the antenna of the GPS receiving unit and the antenna of the microwave receiving unit. The antenna unit may be connected to the monitor unit via wire or wirelessly. The light receiving unit may have the same configuration as the light receiving unit 12 and is a light receiving unit for receiving light from the speed measurement device 30.

(11-28) The housing of the antenna unit that includes the light receiving unit in (11-27) or the separate housing that includes the light receiving unit may be provided with a security function that causes a light emitter (e.g., an LED) to flash (e.g., a dummy) while the vehicle is stopped. This light emitter may be provided on the top surface of the housing, and the light receiving unit may be provided on the back side.

(11-29) The "electrical connection" in (11-27) is preferably made by wire, and a relay unit having a separate housing is provided between the antenna unit and the display unit. The relay unit preferably has the function of supplying power to the electronic circuit in the housing having the light receiving unit and relaying signals from the electronic circuit in the housing having the light receiving unit to the display unit.

(11-30) In a configuration including a GPS receiving unit antenna (i.e., a "GPS antenna"), a microwave receiving unit antenna, and an optical receiving unit, it is preferable that the GPS antenna be positioned at the top of these.

(11-31) In a configuration including a GPS antenna, a microwave receiving antenna, and a light receiving unit, the microwave receiving antenna and the light receiving unit should preferably be positioned further forward in the direction of travel than the GPS antenna.

(11-32) In a configuration including an antenna for the microwave receiving unit and a light receiving unit, it is preferable that the two are arranged side by side in the left-right direction. In this case, it is preferable that they do not overlap in the up-down direction.

(11-33) In a configuration including an antenna for the microwave receiving unit and a light receiving unit, it is preferable that the light receiving unit be positioned above the antenna for the microwave receiving unit.

(11-34) The electronic circuit of the housing having the light receiving unit may be connected to a drive recorder, and the drive recorder may be configured to record video when the light receiving unit receives light from the speed measurement device 30. The display unit may be configured to play back recorded video when the light receiving unit receives light from the speed measurement device 30. This video may be, for example, video from a predetermined period of previously recorded video.

(11-35) It is preferable for electronic devices to be configured to receive light using a light guide tube such as an optical fiber or other light guide member. For example, there are cases where the GPS antenna, microwave receiving antenna, and light receiving unit cannot be placed in ideal positions.

(11-36) Figure 70(a) is a diagram showing an example of such a configuration. In this example, within the housing 1051, on the substrate 1052, the microwave receiving unit antenna 1053 is arranged on the front side in the direction of travel of the vehicle, and the light receiving unit 12 is arranged further rearward. The GPS antenna 1054 is arranged in a position overlapping the light receiving unit 12 in the vertical direction. The light guiding member 1055 is arranged on one side of the antenna 1053 in the direction of travel of the vehicle. Light incident on the end face of the light guiding member 1055 on the front side of the vehicle is guided to the opposite end face. The light receiving unit 12 faces the opposite end face. The light receiving unit 12 receives light emitted from the opposite end face. Note that the light guiding member 1055 only needs to be arranged so that light from the front side in the direction of travel of the vehicle can enter it, and the arrangement of each component is not limited to the example described in Figure 70(a). Figure 70(b) is a top view of this electronic device. As shown in Figure 70(b), the installation problem can be alleviated by arranging the light-guiding member 1055 so that it can rotate around the rear axis 1056.

In the above explanation, the components were placed on the left side to take into account the light received from the speed measuring device located on the left side. However, since light may be reflected from the central divider, etc., they may instead be placed on the right side.

(11-36) The light-receiving sensitivity of the light-receiving unit of the member functioning as a visible light cut filter, such as the lids 1003 and 803, varies depending on the surface condition. For example, it is preferable for the surface of the member to be textured (relatively rough), but it may also be smoother (shinier and less rough) (e.g., polished), in which case improved light-receiving sensitivity can be expected. In the case of a textured surface, light is diffused on the surface. Expecting this effect, it is thought that sensitivity can be easily achieved even if the light-receiving direction is shifted horizontally. On the other hand, the inventors believed that a polished surface would increase sensitivity because light does not diffuse when passing through the member functioning as a visible light cut filter, and more light reaches the light-receiving unit. Figure 71 shows the difference between having and not having a textured surface.

In the case of embossing, it is advisable to use a configuration that does not impair the design. For example, it may be desirable for the inside of the housing to not be visible from the outside. If the periphery of the component functioning as the visible light cut filter is embossed or otherwise patterned, the component part functioning as the visible light cut filter should also have a similar pattern. The color of this part, as seen from the outside, should be similar to the color of the housing and should allow the light to be detected to pass through.

(11-37) The control unit 11 of the electronic device 10 may use a camera capable of capturing images in the infrared region and, if it detects an image corresponding to light from the speed measurement device 30 within the captured image area, may perform warning control. The image corresponding to this light may be a flashing light (for example, an area with a small number of pixels (a range equivalent to a point)). The control unit 11 of the electronic device 10 may determine that the position of the image corresponding to this light in the captured image corresponds to the installation location of the speed measurement device. The control unit 11 of the electronic device 10 may also identify an area directly above the roadway and to the side of the driving lane (side strip position) using image recognition and determine whether a flashing light is present in that position.

(11-38) It is possible to use a separate visible light cut filter so that the light passes through the lens after the visible light cut filter, but it is better to make the lens itself out of a material that cuts visible light and not install a separate visible light cut filter on the surface of the housing.

(11-39) It is preferable to provide an adjustment means for adjusting the orientation of the portion where the incident portion is provided (the protruding portion described above). The adjustment means may be configured to change the orientation of the portion where the incident portion is provided when a human hand applies force, and not change the orientation of the portion where the incident portion is provided when a human hand applies force. The adjustment means should be able to change the orientation up, down, left, and right, but it is preferable that the orientation be adjustable at least left and right. In particular, a display unit provided on the front side of the housing and the adjustment means and incident portion provided on the back side of the housing provide excellent effects. In particular, when installed on the right side of the dashboard in front of the driver's seat, the display screen of the display unit should be oriented so that the left side is forward so that it is easy to see. In this case, the light receiving unit will face forward to the right, making it difficult to receive light from the speed measuring device 30, which is often emitted from the front left side of a roadside strip or the like. However, by doing this, the light receiving unit can be oriented in that direction, in the direction of light from the speed measuring device 30, which is often emitted from the front left side of a roadside strip or the like.

(11-40) It is preferable to have a function to transmit information about the location where monitoring activities were conducted by the speed measurement device 30 to a server or another vehicle based on instructions from the user or the reception of light from the speed measurement device 30. In this case, it is preferable to have a function to transmit information about the type of monitoring, indicating that the location was a location where monitoring activities were conducted using light from the speed measurement device 30, in addition to information about the location (for example, current location information from GPS).

It is also preferable to have a function for transmitting information that can distinguish between a user's post of a location where monitoring activities were being conducted by the speed measurement device 30 and an automatic post based on reception of light from the speed measurement device 30. It is also preferable to have a function for receiving information about a location where monitoring activities were being conducted by the speed measurement device 30 that was posted to the server, and a function for notifying the user when the user's vehicle approaches the received location that the location is a location where monitoring activities were being conducted by the speed measurement device 30. At this time, it is also preferable to receive information that can distinguish between a user's post of a location where monitoring activities were being conducted by the speed measurement device 30 and an automatic post based on reception of light from the speed measurement device 30, and to notify the user whether the post of a location where monitoring activities were being conducted by the speed measurement device 30 was an automatic post based on reception of light from the speed measurement device 30. It is preferable to consider the "approach of the user's vehicle to the received location" as a distance longer than the detectable distance of laser light. For example, if the detectable distance of a normal laser light is 500 m, it is preferable to determine whether the user's vehicle is approaching the received location at 800 m.

For example, it would be desirable to have a function that, after passing a location where a posted speed measurement device 30 was conducting surveillance, issues a notification to the user asking whether or not surveillance was being conducted by a speed measurement device 30, detects the user's voice or manual actions in response, and transmits information to the server as to whether or not surveillance was being conducted by a speed measurement device 30 at the location where the posted laser speed measurement device was conducting surveillance. It would be desirable to have a function that acquires this information from the server and adds information as to whether or not surveillance was being conducted by a speed measurement device 30 to a notification for anything approaching that location, or to not issue a notification at all.

In addition to or instead of sending the information to a server (for example, sending it to a server connected to the Internet via wireless LAN and an LTE wireless LAN router), the information may be broadcast via radio waves to the surrounding area or communicated with other radar detectors in the vicinity. This information may also be relayed between radar detectors in each vehicle using P2P or similar methods.

Regarding (11-41) and (11-40), the idea of automatically posting and sharing data on the locations where light is received from the speed measurement device 30 or the locations where radar-type radio waves are received is thought to be a function that cannot be fully utilized unless there is accurate registration of reception without misidentification and a large number of users who utilize the network. Therefore, the following configuration may be adopted based on the idea that if a system for posting to an SNS (Social Network System) is used and many users can see the data, it may ultimately lead to increased appeal for the electronic device 10 or its provider (company), which may lead to increased purchasing power. The SNS may be, for example, Twitter (registered trademark), Instagram (registered trademark), or other SNS.

When the control unit 11 of the electronic device 10 begins receiving pulsed light corresponding to an optical system or radio waves corresponding to a radar system, it acquires an image captured by an onboard camera (e.g., onboard camera 50) and begins image recognition processing of the acquired image. This image recognition processing recognizes the image of the speed measurement device contained in the captured image. The image recognition processing algorithm may be performed using a known image recognition process. For example, image data representing images of optical and radar speed measurement devices is pre-stored in the memory unit 18. The control unit 11 uses this image data to perform image recognition processing, for example, using a pattern patching method. Here, the control unit 11 may narrow down the image data used for image recognition processing depending on the form of pulsed light reception or radio wave reception. For example, when pulsed light is received, the control unit 11 may narrow down the image data to image data of optical speed measurement devices stored in the memory unit 18, and when radio waves are received, the control unit 11 may narrow down the image data to image data of radar speed measurement devices stored in the memory unit 18. The control unit 11 compares the image captured by the in-vehicle camera 50 with the image represented by the narrowed-down image data and determines whether a speed measurement device has been captured based on a value indicating the degree of similarity (here, a score value). The score value indicating the degree of similarity, for example, increases as the degree of similarity increases. The score value is calculated using a known algorithm. For example, if the score value is equal to or greater than a threshold, the control unit 11 determines that a speed measurement device is present and performs posting processing. For example, if the score value is less than the threshold, the control unit 11 determines that a speed measurement device is not present and does not perform posting processing. Note that if the vehicle is not equipped with an image recognition camera such as the in-vehicle camera 50, the control unit 11 determines whether there is any related public enforcement information or enforcement Point of Interest (PoI) when it begins receiving pulsed light or radio waves. If the control unit 11 determines that either of these exists, it performs posting processing; if it determines that there is no such information, it does not perform posting processing.

The control unit 11 performs a posting process to post information such as location information indicating the location of the speed measurement device to the server via the communication unit 17. The control unit 11 generates data in a predetermined format, such as CSV (Comma-Separated Values), including, for example, latitude and longitude as location information indicating the location of the speed measurement device, date and time, the type of electronic device 10 (e.g., manufacturer name, model, or model number), the name of the road being traveled, the address of the current location, and a comment for SNS, and uploads the data to the server. The comment for SNS is, for example, a compilation of the date and time, the type of electronic device 10, the name of the road being traveled, the address of the current location, etc. The server may store the data sorted by date and time, for example, to make it easier to handle the data sent from the electronic device 10. The server automatically posts the data to SNS. The server may devise a posting process to measure the number of likes (so-called "likes") for the content of the post in order to gain followers. The SNS comment is used for the caption and comment.

The control unit 11 of the electronic device 10 periodically monitors the server, and if the latest data has been updated, downloads the posted data and displays it on a map or as captions. This display can be turned on or off, and only the most recent information can be displayed for those who wish to see it. Here, for example, the following message is displayed: "This is Wakkanai City, Hokkaido, but an icon and caption are displayed on the map with a caption: Portable speed camera currently under investigation on National Route 238!"

(11-42) Regarding the configuration of (11-41), the control unit 11 may continue to perform control to notify the presence of the speed measurement device 30 when the reception of pulsed light is interrupted after the reception of the pulsed light, or when a preceding vehicle is recognized from the image of the in-vehicle camera 50. In this way, the presence of the speed measurement device 30 can be notified even if the pulsed light from the speed measurement device 30 is blocked by the preceding vehicle.

(11-43) Regarding the configuration of (11-41), when the intensity of the received pulsed light suddenly disappears from a state where it was higher than a predetermined level (for example, when the vehicle passes the location of a speed measurement device), the control unit 11 may upload to the server, along with location information, an image (e.g., a photograph) taken just before the detection ceased (for example, just before passing the location of the speed measurement device). This allows the server to determine whether the image is a false alarm or a real alarm by looking at the image. It is even more preferable to upload an image taken by the rear camera to the server after the detection ceases (for example, after passing). The control unit 11 may also have another vehicle device (electronic device 10 or an on-board camera) take an image of the location of the speed measurement device and automatically upload it. In this case, the electronic device 10 may distribute information about the location of the speed measurement device to models without a pulsed light receiving function, allowing them to take and upload the image. Image information, such as the time when enforcement will be discontinued, can be collected from a large number of existing electronic devices. In this case, models with a pulsed light receiving function may also upload the laser reception level.

(11-44) The control unit 11 may include the logo or text of the manufacturer of the electronic device 10 in the image (11-43) or in the description, and post it on SNS with the message, "Thank goodness I had XX radar" (where XX is the manufacturer's name). The type of electronic device 10 (e.g., model number) may also be included here. The control unit 11 may also include the vehicle speed at the time (e.g., only if it was below the speed limit). The control unit 11 may also include the speed limit of the road. The control unit 11 may also include information about nearby facilities. For example, the control unit 11 may post, "I passed a laser speed camera near △△, which has a speed limit of 60 km, at 55 km/h. Thank goodness I had XX radar." The image may be a screenshot of the screen of the electronic device 10 itself. In particular, it may be a display screen itself, with an image related to the electronic device 10's notification superimposed on an image captured by a dashcam. In this case, it is advisable to use an image that mimics the outer frame of the radar screen (where the model name and function names are written) on the outside of the display screen (i.e., an image of the display area that is the housing part when the electronic device 10 is viewed from the front).

(11-45) The electronic device 10 may upload and share the location where a notification by the radar-based cancellation function was canceled to the server via the network. This can prevent false notifications from being issued from the start, even for automatic doors or other objects near roads that other users are traveling on for the first time.

(11-46) Radar detectors may react to vending machines. Therefore, when an electronic device receives a specific radio wave (radar wave) while parked, it displays a message asking "Are there any vending machines nearby?" along with buttons for "Yes" and "No" and accepts posts. The electronic device then sends the posted data to a server. The server can aggregate the posted data and distribute it as a vending machine point, etc., indicating that it is a source of a false alarm.

(11-47) By connecting the electronic device 10 to a mutually-communicating drive recorder, it is possible to supply power to the drive recorder and transmit video/audio signals, operation signals, GPS information, and OBDII information. It also has a linkage mode that automatically switches to an external input display when approaching a speed measurement device. When approaching a speed measurement device, the position of the speed measurement device's camera (for example, one of three fixed patterns: up/left/right) is highlighted in red to notify the driver. The speed warning point alert warns of points where the maximum speed changes, indicating a high possibility of enforcement action. It also has a normal/mirror image switching function, allowing the drive recorder to be used as a backup camera.

12. Other Embodiments
Regarding the configuration for widening the light acceptance angle of the light receiving element by combining the above-mentioned lenses or mirrors, the following configuration may be adopted, for example. FIG. 72 is a diagram showing the configuration of the electronic device 10A of this embodiment as viewed from the upper right diagonal direction on the rear side. FIG. 73 is a six-view diagram showing an example of the external configuration of the electronic device 10A of this embodiment. FIG. 73 shows a front view, a top view, a right side view, a bottom view, a left side view, and a rear view of the electronic device 10A. Hereinafter, elements that are the same as those described in [7. Mechanism of the electronic device 10] will be represented by the same reference numerals as those used in [7. Mechanism of the electronic device 10], and descriptions thereof will be omitted as appropriate.

The housing 100A of the electronic device 10A is divided into a first housing 1001 located on the front side and a second housing 1002A located on the rear side. The front of the first housing 1001 is provided with a display unit 13, a light-emitting unit 23, and an illuminance sensor 201 of the sensor unit 20. The display area of the display unit 13 is located in an opening on the front side of the first housing 1001. A speaker 14 is provided to output sound from the top end surface of the second housing 1002A. The right end surface of the housing 100A is provided with an attachment unit 21 (i.e., an SD card slot) for attaching an SD card. A condensing lens 300 is provided in the upper right part of the back of the housing 100A. The power switch 221 and DC jack 222 of the power supply unit 22 are provided in the lower left part of the back of the housing 100A.

A lens holder 1006 is provided on the back of the second housing 1002A. The lens holder 1006 forms a window, which is an opening that allows communication between the inside and outside of the housing 100A. When viewed from the back of the housing 100A, the lens holder 1006 has an elliptical shape with its major axis in the horizontal direction and its minor axis in the vertical direction. When the electronic device 10A is installed in a vehicle, the horizontal direction corresponds to the width direction of the vehicle, and the vertical direction corresponds to the height direction of the vehicle.

The condensing lens 300 is fitted into the lens holder 1006. The condensing lens 300 is part of the light receiving unit 400 and is located at a position corresponding to the light incident portion described in the above-described embodiment. The lens holder 1006 and condensing lens 300 are located toward the upper right of the second housing 1002A when viewed from the back of the second housing 1002A. For example, the condensing lens 300 is positioned on the back of the housing 100A at least above the vertical center and at least to the left of the vehicle's traveling direction as viewed from the driver's seat of the vehicle. This is because light from the speed measurement device 30 may be more easily received if the condensing lens 30 is positioned relatively high on the back of the second housing 1002A and on the shoulder side where the speed measurement device 30 is likely to be located. The pulsed light Lout from the speed measurement device 30 is introduced into the housing 100A via the lens holder 1006 and the condensing lens 300. The entire condenser lens 300 is made of a material that transmits light. The condenser lens 300 is transparent or translucent. The light incident surface of the condenser lens 300 is aspherical, and protrudes further rearward than the rear surface of the housing 100A. The condenser lens 300 is an aspherical lens, and its configuration will be described in detail later. The condenser lens 300 is a lens that transmits at least the pulsed light Lout, and is a translucent or transparent material. This may contribute to the aesthetic appeal of the electronic device 10A.

Figure 74 shows the electronic device 10A with the second housing 1002A removed. Figure 75 shows the electronic device 10A with the condenser lens 300 removed. Figure 76 shows the electronic device 10A with the filter 250 and shield plate 270 removed.

A condensing lens 300 is provided on the second substrate 1030 at a position overlapping the first region Ar3. The condensing lens 300 is designed and manufactured to condense the pulsed light Lout at a predetermined focal distance. The light receiving element 410 receives the light condensed by the condensing lens 300. The light receiving element 410 is provided on the side of the second substrate 1030 opposite the side on the condensing lens 300 side, which in this embodiment is the side on which the first substrate 1010 is located. Therefore, the light receiving element 410 receives light that has passed through a light-transmitting portion 1033 provided on the second substrate 1030. In this embodiment, the light-transmitting portion 1033 is a rectangular parallelepiped opening. The light receiving element 410 may be the same element as the first light receiving element 122 or the second light receiving element 124, but differs from the above-described embodiment in that there is only one light receiving element.

Filter 250 is an example of a wavelength selection section equivalent to first wavelength selection section 121. Filter 250 is provided between light receiving element 410 and condenser lens 300, and selects and transmits light of a specific wavelength λout from the incident light. Filter 250 may be configured as desired and may be removed. Shield plate 270 is a shield made of, for example, aluminum or a conductive material, and is provided in an area surrounding three of the four sides of light-transmitting section 1011. Shield plate 270 is intended to suppress the effects of static electricity and the like on light receiving element 410 and other electronic components.

Figure 77 is a view of Figure 76 with the second substrate 1030 removed. The light receiving element 410 is housed in a shield case 280. The shield case 280 is provided on the side of the first substrate 1010 opposite the one side facing the condenser lens 300, and covers the entire light receiving element 410. Such a shield case 280 performs the same function as the shield case 1031.

In this way, the light receiving element 410 is arranged on the surface of the second substrate 1030 that faces the front of the electronic device 10A. This allows for more reliable shielding using a simple method, and since the first substrate 1010 is located between the light receiving element 410 and the condenser lens 300, the space equivalent to the focal length can be effectively utilized. As a result, this also contributes to making the housing 100 more compact as a whole. Note that similar effects can be expected by arranging the light receiving element 410 on the surface of the first substrate 1010 that faces the front or rear of the electronic device 10A.

Figure 78 is a six-view diagram showing an example of the configuration of the focusing lens 300. The focusing lens 300 is an aspherical lens that focuses reflected light from the speed measurement device 30 and forms an image at a predetermined focusing position. The focusing lens 300 is an aspherical lens whose light incidence surface is aspherical. The focusing lens 300 includes an incidence surface 310 and an emission surface 320. The incidence surface 310 includes an aspherical curved surface 311 onto which the pulsed light from the speed measurement device 30 is incident. The incidence surface 310 includes the curved surface 311 that is convex along the width direction of the vehicle. The curved surface 311 is most protruding at the center in the width direction of the vehicle. The curved surface 311 is also convex along the height direction of the vehicle. The curved surface 311 is most protruding at the center in the height direction of the vehicle. The curved surface 311 is, for example, parabolic in shape, but any other shape may be used as long as it is a surface consisting of a smooth curve.

The length La of the curved surface 311 in the width direction of the vehicle is greater than the length Lb in the height direction. The curvature of the curve of the condenser lens 300 in the width direction of the vehicle is smaller than the curvature of the curve in the height direction of the vehicle. In this way, the condenser lens 300 curves more gently in the width direction of the vehicle than in the height direction of the vehicle.

The exit surface 312 is a surface from which light incident on the entrance surface 310 (particularly the curved surface 311) exits. The exit surface 312 is a flat surface. However, the exit surface 312 may also be curved.

The focusing lens 300 guides the pulsed light from the speed measurement device 30 to the position of the light receiving element 410. The position of the focusing lens 300 is set so that the light is focused at the position of the light receiving element 410 according to the characteristics of the focusing lens 300.

A flat surface 313 is provided around the curved surface 311 of the incident surface 310. Legs 314A and 314B are provided on a pair of opposing sides of the flat surface 313. The legs 314A and 314B are fixed to the first substrate 1010. Note that the flat surface 313 and the legs 314A and 314B are not essential components.

By using an aspherical lens as the focusing lens 300 in the above configuration, spherical aberration can be suppressed when forming an image on the light receiving element 410, compared to when a spherical lens is used. The spot size obtained with an aspherical lens can be several orders of magnitude smaller than that of a spherical lens. Based on this thinking, it is conceivable that the focusing lens may be realized by combining multiple lenses that have smaller spherical aberration than spherical lenses.

When the speed measurement device 30 is located on the shoulder of the road, if the distance between the speed measurement device 30 and the vehicle is large, the pulsed light Lout is incident from almost directly in front of the device. However, as the speed measurement device 30 approaches, the pulsed light Lout is incident from the left. For this reason, the horizontal length La of the focusing lens 300 is made greater than Lb so that the focusing lens 300 can receive light at a wider acceptance angle in the width direction of the vehicle than in the height direction of the vehicle. For example, the focusing lens 300 is designed to be able to focus light incident at an incident angle of 40 degrees on both sides in the width direction and 20 degrees on both sides in the height direction. By making the height length Lb of the curved surface 311 relatively short, the focusing of light other than the pulsed light Lout is reduced. If the objective is to receive light at a wide range of incident angles in the width direction of the vehicle, the curved surface 311 may be flat along the height direction of the vehicle.

Rather than positioning the light receiving element 410 at the focal length of the focusing lens 300, it is preferable to position the light receiving element 410 at a position shorter than the focal length. Because the focusing lens 300 has a small curvature and bends light significantly, light around the focusing lens 300 tends to gather near the center of the optical axis, in front of the focal length. By positioning the light receiving element 410 in front of the focal length, more light can be collected. Additionally, light coming from a steep angle also passes near the center of the optical axis, in front of the focal length position. By positioning the light receiving element 410 in front, light with a wide angle of incidence can be received.

The condenser lens 300 has the property of being able to detect even the weakest pulsed light from the speed measurement device 30. This allows the electronic device 10 to detect the presence of the speed measurement device 30 over an extremely wide range and long distances, and to quickly report its presence. As in the above-described embodiment, a visible light cut filter may be provided on the incident surface of the condenser lens 300, or the condenser lens 300 may be made of a material that has a visible light cut function. This reduces the effects of visible light. The condenser lens 300 may be what is known as an aspheric lens.

The focusing lens 300 may be positioned so that its optical axis is parallel to the longitudinal direction of the vehicle, or may be tilted. In this case, if the optical axis of the focusing lens 300 is tilted to the left front side relative to the longitudinal direction of the vehicle, it may be easier to receive the pulsed light Lout from the speed measurement device 30.

The inventors conducted an experiment to confirm that an aspherical lens can receive light with a wide incident angle. As shown in Figure 79(a), a commercially available semi-circular rod of transparent acrylic (radius 6.35 mm) was ground down to a thickness of 3 mm and polished. A photodiode (PD) was used as the light receiving element. The back focus focal length was 3 mm, and the lens was positioned 1 mm above the light receiving element to ensure a wide upper angle of view. Figure 79(b) is a table showing the relationship between the light source direction [deg] and the ATT value [db] in this case. This confirmed that the curved horizontal acceptance angle was greater than the vertical acceptance angle.

Figure 80 shows an example of the electrical configuration of the light-receiving unit 400. The light-receiving element 410 is a photodiode. The cathode of the light-receiving element 410 is connected to the high-potential power supply line, and the anode of the light-receiving element 410 is connected to one end of resistor R3. The other end of resistor R3 is grounded. The input terminal of amplifier AMP1 is commonly connected to the anode of the light-receiving element 410 and one end of resistor R3. Multiple amplifiers AMP2, ..., AMPN are connected in series downstream of amplifier AMP1. The value of N is arbitrary. However, it is desirable that amplifiers AMP1 to AMPN be designed to amplify signals in the wavelength range of a specific wavelength λout. The output terminal of AMPN is connected to one input terminal (here, the positive input terminal) of differential amplifier 430, and signal SIGN is input. A threshold level Thn is input to the other input terminal (here, the negative input terminal) of differential amplifier 430. The differential amplifier 430 functions as a comparator that outputs a signal corresponding to the difference between the signal SIGN and a threshold level Thn. The differential amplifier 430 outputs a signal with a positive potential when the signal SIGN exceeds the threshold level Thn, and a signal with a negative potential when the signal SIGN is equal to or less than the threshold level Thn. The control unit 11 detects the presence of the speed measurement device 30 based on the difference between the signal SIGN and the threshold level Thn.

The control unit 11 may detect the presence of the speed measurement device 30 in the same manner as in the embodiment described above. For example, if the wavelength of the pulsed light is 905 nm, the control unit 11 may perform control to notify the presence of the speed measurement device 30 when pulsed light with a pulse interval of 80 ms (or a range of less than 80 ms and/or more than 80 ms within a certain range from the reference pulse interval) is received. Alternatively, the control unit 11 may perform control to notify the presence of the speed measurement device 30 when pulsed light with a pulse width (light emission time) of 20 ms (or/and a range of less than 20 ms and more than 20 ms within a certain range from the reference pulse width) is received. The control unit 11 may notify the presence of the speed measurement device 30 when pulsed light of a specific wavelength λout is received at least once. In this way, if there is a possibility that the speed measurement device 30 is present, its presence can be quickly notified to the user.

[13. Modifications of [12. Other Embodiments]]
(13-1) As shown in FIG. 81 , the electronic device 10A may have a reflecting unit 500. The reflecting unit 500 is provided at a position different from the optical path from the condensing lens 300 to the light receiving element 410. The reflecting unit 500 includes a reflective surface that reflects at least a portion of the light emitted from the condensing lens 300 toward the light receiving element 410. The reflecting unit 500 has a portion that surrounds the optical path, and is preferably formed in a cylindrical shape that surrounds the entire optical path to increase the reflectivity. The diameter of the reflecting unit 500 decreases as it approaches the light receiving element 410. In this manner, the amount of light received by the light receiving element 410 from the speed measurement device 30 increases, thereby more reliably notifying the presence of the speed measurement device 30.

For example, the reflector 500 may be arranged with a specular reflective sheet on the substrate surface side, bent vertically into a semi-cylindrical shape with the light receiving element 410 facing inward. For example, the space between the incident portion and the light receiving element 410 may be formed into a tube, with the inside of the tube being a mirror surface (or scattering surface).

(13-2) As shown in FIG. 82, the electronic device 10A may have a reflecting unit 600. The reflecting unit 600 is located on the optical path from the focusing lens 300 to the light receiving element 410. The reflecting unit 600 utilizes total reflection to reflect at least a portion of the light emitted from the light exit surface 320 toward the light receiving element 410. The reflecting unit 600 is, for example, a columnar, rectangular prism, conical, or pyramidal medium located between the focusing lens 300 and the light receiving element 410, and may be a member that has the function of reflecting light, such as infrared-transmitting resin, glass, or optical fiber. The reflecting unit 600 may be made of any material that transmits light of a specific wavelength. The reflecting unit 600 may be realized by utilizing total reflection at or above the critical angle. For total reflection at the critical angle, the side of the reflecting unit 500 may be flat, or may have an uneven shape such as a jagged edge. It is also possible to direct light traveling outward from the focusing lens 300 inward. This increases the amount of light received by the light receiving element 410 from the speed measurement device 30, making it possible to more reliably notify the presence of the speed measurement device 30.

(13-3) The vertical center position of the condenser lens 300 may be shifted higher than the light receiving element 410. This is to ensure that light is properly incident on the light receiving element 410 even when the main unit screen is tilted so that the upper side of the screen is positioned further back, making it easier to see.

This configuration is related to the "wider upper angle of view" described in Figure 79. In other words, the sensitivity to pulsed light is higher from above than from below in the vertical direction. If this configuration is adopted in electronic device 10A, and the display unit 13 (main unit screen) is installed at an angle upward so that it is easily visible from the driver's vehicle, the upper part with good sensitivity (i.e., the part above the center in the vertical direction) will be closer to horizontal, making it easier to receive pulsed light Lout.

(13-4) As shown in FIG. 83, a collision warning system 700 may be installed that emits light toward the windshield 42 of a vehicle. The collision warning system 700 is placed, for example, on or near the windshield 42. The collision warning system 700 emits light L1 of a predetermined wavelength toward the front of the vehicle and receives the reflected light to detect the presence of an object ahead (e.g., another vehicle or a building such as a wall) and the distance to the object, and notify the user. When the collision warning system 700 is activated, disturbance light L2 containing reflected waves from the object ahead or the windshield may be received by the electronic device 10A. In this case, depending on the wavelength of the disturbance light L2, the light from the collision warning system 700 may be mistaken for pulsed light Lout.

Figure 84 is a graph showing an example of temporal changes in the level of light received by the light receiving unit 400. Figure 84 shows a case in which a vehicle is approaching the speed measurement device 30 and the level of the pulsed light Lout gradually increases. The level of the disturbance light L2 indicates the level of light caused by the collision warning system 700. In this example, when the threshold level Thn is set to Th1, the level of the disturbance light L2 is below the threshold level Th1 and the level of the pulsed light Lout is above it, so there is no problem detecting the pulsed light Lout. However, when the threshold level Thn is set to Th2, both the level of the disturbance light L2 and the level of the pulsed light Lout exceed the threshold level Th2. In this case, even if an attempt is made to detect the speed measurement device 30 based on the pulse interval, it will not be detected. While it is sufficient to optimally set the threshold level Thn, this can be difficult because the light level of the collision warning system 700 varies depending on the vehicle model and type. Therefore, the control unit 11 performs control to notify the presence of the speed measurement device 30 when the level of light received at a specific wavelength is equal to or greater than a threshold level, and also performs control to change the threshold level.

Figure 85 shows an example of the electrical configuration of the light receiving unit 400. In this example, the circuit configuration between the control unit 11 and the differential amplifier 430 differs from the configuration shown in Figure 80. One end of resistors R41, R42, and R43 is connected to each of the three terminals of the control unit 11. The other ends of resistors R41, R42, and R43 are connected to the power supply line Vcc, which applies a fixed voltage, via resistor R44. The control unit 11 selectively outputs a 1-bit signal representing either "0" (low level) or "1" (high level) from the three terminals to which resistors R41, R42, and R43 are connected. The threshold level Thi changes depending on the signal level. Here, the threshold level Thi is adjusted using a 3-bit signal, resulting in eight possible levels for the threshold level Thi. The level of the threshold level Thi changes depending on the signal level. Here, "000" is the smallest, and the threshold levels increase in the order of Th1, Th2, ..., Th8 for "001", "010", ..., "111".

During a predetermined period, such as while the vehicle is running or the engine is on, the control unit 11 gradually increases the threshold level from Th1. In the example of FIG. 86, the control unit 11 determines that disturbance light is present because disturbance light L2 is repeatedly received at a high frequency. In this case, the control unit 11 raises the threshold level to Th2. Because the control unit 11 repeatedly receives disturbance light L2 at a high frequency, the threshold level Th2 has not been optimized. In this case, the control unit 11 determines that disturbance light is present and raises the threshold level to Th3. The control unit 11 then determines whether disturbance light L2 is repeatedly received at a high frequency. Because the control unit 11 does not repeatedly receive disturbance light L2 at a high frequency, the threshold level has been optimized. Even if the threshold level is raised to Th3, if disturbance light L2 is repeatedly received at a high frequency, the control unit 11 raises the threshold level to Th4. Subsequent control is similar.

Once the control unit 11 sets the threshold level, it adjusts it at a predetermined timing. This timing may be, for example, at predetermined intervals. At the adjustment timing, the control unit 11 lowers the set threshold level Thi by one step to Thi-1. Then, if the control unit 11 repeatedly receives ambient light L2 at a high frequency, it raises the threshold level Thi-1 by one step and resets it to the threshold level Thi. If ambient light L2 is not repeatedly received at a high frequency, the control unit 11 lowers it by another step to Thi-2. If the control unit 11 repeatedly receives ambient light L2 at a high frequency, it raises the threshold level Thi-2 by one step, returning it to Thi-1 and setting it at this threshold level. If ambient light L2 is not repeatedly received at a high frequency, the control unit 11 further lowers the threshold level to Th-3. Subsequent control is similar. In this way, the threshold level can be constantly optimized. Note that, because the circuit contains noise due to amplifier input noise, etc., it is preferable to set resistors R41 to R44 so that threshold level Th1 exceeds the level of this noise NS. Furthermore, threshold levels Th1 to Th8 do not need to be spaced equally; the higher the levels, the greater the spacing may be, or the spacing may be smaller near the lower and upper limits and larger near the middle. Furthermore, the number of threshold level steps (number of resistors) is not limited to this, and may be less than eight steps or more than eight steps. Furthermore, other configurations may be used to make threshold level Thi variable.

Figure 87 shows an example of a modified electrical configuration of the light receiving unit 400. As described above, when the control unit 11 varies the threshold, periods of repeated high-frequency light reception occur at regular intervals, making it impossible to correctly determine the reception of pulsed light Lout. Therefore, as shown in Figure 87, a signal SIGN may be input to one input terminal (here, the positive input terminal) of the differential amplifier 440 and a threshold level Thi+1 may be input to the other input terminal (here, the negative input terminal) of the differential amplifier 430 and the output terminal of the amplifier AMPN. The threshold level Thi+1 may be defined in the same way as the threshold level Thi. The output terminal of the differential amplifier 440 is connected to the control unit 11. The control unit 11 sets the threshold level so that the level from the differential amplifier 440 is high and the level from the differential amplifier 430 is low, and does not change the threshold level during this period. The control unit 11 then raises the threshold level if both are at a low level, and lowers the threshold level if both are at a high level. It is possible to deal with light from other devices and other disturbance light, not just collision warning system 700. Disturbance light that can be dealt with includes infrared light from a remote controller, laser light from road surveying equipment, laser light from automatic braking emitted by other vehicles, and sunlight. For example, a filter provided in the light receiving unit prevents infrared light from a remote controller or laser light from road surveying equipment from being mistaken for pulsed light from a speed measurement device, and the control unit's function prevents laser light from automatic braking emitted by other vehicles and sunlight from being mistaken for pulsed light from a speed measurement device.

14. Other Examples of Electronic Devices
Fig. 88 is a diagram showing the external configuration of electronic device 80A, which employs the configuration described in [12. Other Embodiments] in electronic device 80 described in Fig. 62. Figs. 89 and 90 are six-sided views showing an example of the external configuration of electronic device 80A. Fig. 89 shows a front view, top view, right side view, bottom view, and left side view of electronic device 80A. Fig. 90 shows a rear view of electronic device 80A. A condenser lens 300 is provided on the rear side of electronic device 80A.

Figures 91, 92, and 93 are diagrams showing the internal configuration of electronic device 80A. Electronic device 80A differs from electronic device 80 in that light-receiving element 843 is formed on fourth substrate 840 so as to receive pulsed light. Light-receiving element 843 may have the same configuration as light-receiving element 410. Light-receiving element 843 is provided on the side of fourth substrate 840 opposite one side of focusing lens 300. Therefore, light-receiving element 843 receives light that has passed through light-transmitting portion 842 provided on fourth substrate 840. Light-transmitting portion 842 is a rectangular parallelepiped opening in this case. Filter 870 performs the same function as filter 250. Shield plate 880 performs the same function as shield plate 270. Light-receiving element 843 is housed in shield case 890. Shield case 890 performs the same function as shield case 280. Such electronic device 80A can also achieve the same effects as electronic device 10A.

15. Other Embodiments
Regarding a configuration in which lenses or mirrors are combined to widen the light acceptance angle of a light receiving element, for example, an electronic device having the following configuration may be provided. FIG. 94 is a diagram showing the external configuration of an electronic device 900 of this embodiment. FIG. 94( a) is a diagram showing the electronic device 900 as viewed from diagonally above right on the front side of the electronic device 900. FIG. 94( b) is a diagram showing the electronic device 900 as viewed from diagonally above right on the rear side of the electronic device 900. FIG. 95 is a six-view diagram showing an example of the external configuration of the electronic device 900. FIG. 95 shows a front view, a top view, a right side view, a bottom view, a left side view, and a rear view of the electronic device 900.

Electronic device 900 has a rectangular parallelepiped appearance that is wider than it is vertically. Electronic device 900 has dimensions and a weight that allow it to be easily carried by a user. For example, electronic device 900 has a width (horizontal length) of 48 mm, a height (vertical length) of 34 mm, a depth of 13 mm, and a weight of 16 g. Housing 900A of electronic device 900 is divided into a first housing 901 located on the front side and a second housing 902 located on the rear side. A light-emitting unit 911, an operation unit 912, and a sound-emitting unit 913A are provided on the front side of first housing 901.

The light-emitting unit 911 emits a predetermined light. The light-emitting unit 911 includes, for example, a light-emitting diode. The light-emitting unit 911 emits light according to the operating state of the electronic device 900. The light-emitting unit 911 is located near the bottom right of the first housing 901 when viewed from the front. The light-emitting unit 911 emits white light when the electronic device 900 is in standby mode. The light-emitting unit 911 emits blue light when the electronic device 900 is in operation. The light-emitting unit 911 emits red flashing light when the electronic device 900 is receiving pulsed light Lout. Note that the relationship between the operating state and the light-emitting state is not limited to this, and various modifications are possible to the light-emitting color and timing of light emission (e.g., the frequency and number of flashes).

The operation unit 912 accepts user operations. The operation unit 912 is provided in a position toward the lower right of the first housing 901 when viewed from the front, and is located immediately to the right of the light-emitting unit 911. Here, the operation unit 912 functions as a volume button. The operation unit 912 is operated by the user, for example, to adjust the volume of alarm sounds and other sounds, or to mute the alarm sound emitted when pulsed light Lout is received. Here, the operation unit 912 accepts press operations, but it may also be an operation unit that accepts slide, touch, or other operations.

The sound emitting unit 913A emits a predetermined sound. The sound emitting unit 913A has multiple holes located near the top right of the first housing 901 when viewed from the front. The sound emitting unit 913A outputs sound through these multiple holes. The sound emitting unit 913A outputs alarm sounds and other sounds.

A DC jack 914 is provided on the left side of the housing 900A, which accepts power input from a power source. A cigarette lighter plug cord or a power cable, for example, is connected to the DC jack 914. A mounting portion 917 is provided on the back of the second housing 902 for mounting the first mounting member 940 and the second mounting member 950, which will be described later. Thus, the mounting portion 917 is a mounting portion shared by both the first mounting member 940 and the second mounting member 950. The mounting portion 917 is located near the center of the width of the second housing 902 when viewed from the back, near the bottom end of the second housing 902. The mounting portion 917 has a pair of grooves 9171, 9172. The pair of grooves 9171, 9172 are spaced a predetermined distance apart in the width direction of the electronic device 900, and each extends vertically. The pair of grooves 9171, 9172 allows the first mounting member 940 and the second mounting member 950, which will be described later, to be attached and detached. The first mounting member 940 and the second mounting member 950 may also be fixed to the second housing 902 using fasteners such as screws.

A lens holder 915 is provided on the rear surface of the second housing 902. The lens holder 915 forms a window, which is an opening that allows communication between the inside and outside of the housing 900A. The lens holder 915 may have the same shape as the lens holder 1006 described above, and is an ellipse with a major axis in the width direction and a minor axis in the up-down direction when viewed from the rear surface of the housing 900A. When the electronic device 900 is installed in a vehicle, the width direction corresponds to the width direction of the vehicle, and the up-down direction corresponds to the height direction of the vehicle. The second housing 902 is fastened to the first housing 901 using screws 918 and 919 at both ends in the width direction when viewed from the rear surface.

The condensing lens 920 is fitted into the lens holder 915. The condensing lens 920 is part of the light receiving unit 920A of the electronic device 900 and is provided at a position corresponding to the light entrance portion. The condensing lens 920 may have the same configuration as the condensing lens 300. The lens holder 915 and the condensing lens 920 are provided in a position toward the upper right of the second housing 902 when viewed from the rear side of the second housing 902. For example, the condensing lens 920 is positioned on the rear side of the housing 900A at least above the center in the vertical direction and at least to the left of the vehicle's direction of travel as viewed from the driver's seat of the vehicle. This is because the condensing lens 920 may be more easily able to receive light from the speed measurement device 30 if it is positioned relatively high on the rear side of the second housing 902 and on the shoulder side where the speed measurement device 30 is likely to be located. The pulsed light Lout from the speed measurement device 30 is introduced into the housing 900A via the lens holder 915 and the condenser lens 920.

Figure 96 is a diagram showing the electronic device 900 with the second housing 902 removed. Figure 97 is a diagram showing the electronic device 900 with the condenser lens 300 removed. Figure 98 is a diagram showing the electronic device 900 with the first housing 901 removed.

A substrate 930 is provided inside the housing 900A. The substrate 930 is roughly rectangular, with its width longer than its height, and has approximately the same shape and dimensions as the front of the first housing 901 and the rear of the second housing 902. A light receiving unit 920A (condensing lens 920) is provided on the substrate 930 in a position toward the upper right when viewed from the rear. The condensing lens 920 is designed and manufactured to condense the pulsed light Lout at a predetermined focal length position. The light receiving element 931 receives the light condensed by the condensing lens 920. The electronic device 900 has a single light receiving element, the light receiving element 931. The light receiving element 931 may have the same configuration as the light receiving element 410. The light receiving element 931 is provided on the surface of the substrate 930 opposite the surface on which the condensing lens 920 is located, which in this embodiment is the front surface of the electronic device 900. Therefore, the light receiving element 931 receives light that has passed through the light transmitting portion 932 provided on the substrate 930. In this example, the light transmitting portion 932 is a rectangular parallelepiped opening.

The filter 933 may have the same configuration as the filter 250 and is an example of a wavelength selection unit corresponding to the first wavelength selection unit 121. The filter 933 is disposed between the light receiving element 931 and the condenser lens 920 and selects and transmits light of a specific wavelength λout from the incident light. The filter 933 may be configured as desired and may be removed. The shield plate 934 is a shield formed, for example, from aluminum or a conductive material, and is disposed in an area surrounding three of the four sides of the transparent portion 932. The shield plate 934 is intended to suppress the effects of static electricity and other factors on the light receiving element 931 and other electronic components. The light receiving element 931 is housed in a shield case 935. The shield case 935 is disposed on the side of the substrate 930 opposite the side on which the condenser lens 920 is located—in this embodiment, on the front side of the electronic device 900—and covers the entire light receiving element 931. Such a shield case 936 performs the same function as the shield case 280.

In this way, the light receiving element 931 is disposed on the surface of the substrate 930 that faces the front of the electronic device 900. This allows for more reliable shielding using a simple method, and because the substrate 930 is located between the light receiving element 931 and the condenser lens 920, the space equivalent to the focal length can be effectively utilized. As a result, this also contributes to making the electronic device 900 more compact overall.

The speaker 913 constitutes part of the sound-emitting unit 913A and outputs sound. The speaker 913, operation unit 912, DC jack 914, and light-receiving unit 920A (light-receiving element 921) are electrically connected to the control unit 916. The control unit 916 controls each unit of the electronic device 90 and is, for example, a computer including an arithmetic processing circuit and memory. The control unit 916 may be provided on the side of the substrate 930 on which the condenser lens 920 is located, or on the opposite side. The control unit 916 may issue an alert in response to reception of the pulsed light Lout in the same manner as the control unit 11 described in [12. Other Embodiments] above. Furthermore, when the control unit 11 receives the pulsed light Lout, it may cause the light-emitting unit 911 to emit red light or emit an alarm using the speaker 913. The control unit 916 controls the output of the alarm in response to the volume adjustment made in response to the operation of the operation unit 912. The control unit 916 may perform control other than that of the display unit in the same manner as in the other embodiments described above.

The electronic device 900 configured as described above is attached to a vehicle by selectively using the first attachment member 940 and the second attachment member 950. The first attachment member 940 is a member for attaching the electronic device 900 to the dashboard and is also called a dashboard attachment bracket. The second attachment member 950 is also called a suspended attachment stay.

Figure 99 is a diagram showing the electronic device 900 attached to a dashboard using the first attachment member 940. Figure 99(a) is a diagram showing the electronic device 900 viewed from diagonally above right on the front side of the electronic device 900. Figure 99(b) is a diagram showing the electronic device 900 viewed from diagonally above right on the back side of the electronic device 900. Figure 100 is a diagram showing the external configuration of the first attachment member 940. Figure 101 is a diagram explaining the method of attaching the electronic device 900 using the first attachment member 940.

The first mounting member 940 includes a base portion 941, a socket portion 942, a ball stud 943, and an attachment portion 944. The base portion 941 is attached to the dashboard of the vehicle. The bottom surface of the base portion 941 is attached to the dashboard using a fixing member such as the adhesive sheet or double-sided tape described in Japanese Patent No. 5958927 (Figure 101(a)). The base portion 941 includes a socket portion 942 having a space opening to the front side. The ball portion of the ball stud 943 is attached to the socket portion 942. The socket portion 942 and the ball stud 943 attached to the socket portion 942 form a ball joint mechanism. When the ball stud 943 receives an external force, its position changes up, down, left, and right while attached to the socket portion 942. The attachment portion 944 is provided at the front side of the ball stud 943. The attachment portion 944 is attached to the attachment portion 917 of the electronic device 900. The mounting portion 944 has a pair of protrusions 9441, 9442 that protrude on both the left and right sides when viewed from the front. The protrusion 9441 protrudes further toward the front than other portions of the mounting portion 944 and protrudes to the right when viewed from the front. The protrusion 9442 protrudes further toward the front than other portions of the mounting portion 944 and protrudes to the left when viewed from the front. The protrusion 9441 is inserted into the groove 9171, and the protrusion 9442 is inserted into the groove 9172. When the mounting portion 944 is attached to the mounting portion 917, it is moved from bottom to top with the protrusions 9441, 9442 inserted into the grooves 9171, 9172, respectively ( FIG. 101( b) ). After this attachment, the base portion 941 is attached to the attachment portion (attachment surface) of the dashboard (Figure 101(c)). Attachment is completed in this manner, and the electronic device 900 can change its position up, down, left, and right while attached to the first attachment member 940 in response to an external force (Figure 101(d)). The user can point the electronic device 900 in the desired direction.

The mounting portion 944 may be configured to change the height of the attached electronic device 900. The mounting portion 944 may be, for example, a curved arm-shaped member whose mounting orientation can be rotated 180 degrees vertically to change the height of the electronic device 900. For example, the position of the electronic device 900 may be raised and the front of the electronic device 900 may face slightly upward. Other configurations may also be used to change the height of the electronic device. For example, a pair of protrusions 9441, 9442 may be positioned above or below the center of the mounting portion 944 in the vertical direction, so that the electronic device can be attached even when upside down. This type of attachment using the first mounting member 940 may be applied to any of the electronic devices described herein. In particular, when applied to an electronic device (e.g., electronic device 10) having a display unit (e.g., display unit 13) on its front surface, the display unit is raised and faces slightly upward relative to the horizontal, making it easier for the user to view the display unit.

Figure 102 is a diagram showing the electronic device 900 attached by suspension using the second attachment member 950. Figure 102(a) is a diagram showing the electronic device 900 viewed from diagonally above right on the front side of the electronic device 900. Figure 102(b) is a diagram showing the electronic device 900 viewed from diagonally above right on the rear side of the electronic device 900. Figures 103 to 105 are diagrams showing the external configuration of the second attachment member 950. Figure 106 is a diagram explaining a method of attaching the electronic device 900 using the second attachment member 950.

The second mounting member 950 is a plate-like member made of a metal such as aluminum. The second mounting member 950 has a first portion 951, a second portion 952, and a third portion 953. The first portion 951 is a plate-like portion. The first portion 951 supports the electronic device 900 by having its top surface contact the bottom surface of the electronic device 900.

The second part 952 is a plate-shaped part that is connected to the first part 951 and is approximately perpendicular to the first part 951. The second part 952 is shorter in the width direction than the first part 951. The second part 952 supports the electronic device 900 by having one surface contact the back surface of the electronic device 900. The second part 952 is attached to the attachment part 917 of the electronic device 900 and has a pair of protrusions 9521, 9522 that protrude on both the left and right sides when viewed from the front. The protrusion 9521 protrudes further toward the front than the other parts of the second part 952 and protrudes to the right when viewed from the front. The protrusion 9522 protrudes further toward the front than the other parts of the second part 952 and protrudes to the left when viewed from the front. The protrusion 9521 is inserted into the groove 9171, and the protrusion 9522 is inserted into the groove 9172, thereby attaching to the second part 952 (Figure 106 (c)).

The second portion 952 further has a cutout portion 9523. The cutout portion 9523 is cut out so as not to overlap the condenser lens 920 when the second mounting member 950 is attached to the electronic device 900. In this way, the second portion 952 is configured so as not to cover the condenser lens 920 from the rear side. The cutout portion 9523 may be cut out in a shape that follows the outer edge of the lens holder 915, for example. This ensures that the contact area between the second portion 952 and the electronic device 900 is maintained while preventing the second portion 952 from interfering with the reception of light by the light receiving portion 920A. Of course, the cutout portion 9523 may be cut out in other shapes as long as this light reception is not interfered with.

The third portion 953 is a plate-shaped portion connected to the second portion 952. The third portion 953 is attached (e.g., glued) to the attachment portion using a fixing member such as double-sided tape, with its upper surface serving as the attachment surface. The third portion 953 may be wider than the second portion 952 and may also be wider than the first portion 951. The third portion 953 is configured to be bendable along the boundary portion 9531, and can change its position relative to the second portion 952 when subjected to an external force. The boundary portion 9531 is the portion that forms the boundary between the third portion 953 and the second portion 952. The boundary portion 9531 has a small width to facilitate bending, but may also include a hinge-like component. The second attachment member 950 bends in response to an external force and maintains the bent state (shape) even after the external force is removed.

During installation by the user, the orientation of the third portion 953 relative to the second portion 952 may be adjusted according to the shape of the mounting location on the vehicle—in this embodiment, the inclination of the windshield. For example, the mounting location (attachment location) may be determined in advance, and the second mounting member 950 may be bent and angled to position the electronic device 900 as horizontally as possible relative to the road. As shown in Figures 106(a) and 106(d), the third portion 953 is attached to mounting location C1, which is the gap between the ceiling C2 and the windshield C3 (which may be near the top edge of the windshield C3), using double-sided tape. This gap may be visible to the user as a black border. For example, it is desirable for mounting location C1 to be located behind the rearview mirror, since the electronic device 900 would be hidden behind the rearview mirror for passengers in the vehicle. Forming the third portion 953 to be elongated in the width direction facilitates securing an adequate adhesive surface area for the second mounting member 950 to mounting location C1, enabling more stable attachment of the electronic device 900. The third portion 953 is fixed to the mounting portion C1 using, for example, double-sided tape. In this manner, when the electronic device 900 is mounted using the second mounting member 950, safety standards are met. Furthermore, since the electronic device 900 receives the pulsed light Lout from the speed measurement device 30 at a relatively high position, the light reception is less likely to be obstructed by obstacles such as a vehicle ahead. Furthermore, in certain vehicle models, the portion near the top edge of the vehicle's windshield may be configured to have higher light transmittance than other portions. For this reason, the use of the second mounting member 950 also makes it easier for the electronic device 900 to receive the pulsed light Lout. Therefore, mounting the electronic device 900 using the second mounting member 950 enables more accurate alarm generation. Furthermore, such mounting makes the electronic device 900 less visible from inside or outside the vehicle, which may be desirable in terms of the aesthetics of the vehicle interior. The mounting portion may also be a portion other than the windshield, such as the rear side of the rearview mirror.

16. Other Examples of Electronic Devices
In this embodiment, a configuration will be described in which the electronic device 80A described in [14. Other Examples of Electronic Devices] is attached by suspension. FIGS. 107 to 109 are diagrams showing the electronic device 80A attached by suspension using an attachment member 960. FIG. 107(a) is a diagram showing the electronic device 80A viewed from diagonally above right on the rear side of the electronic device 80A. FIG. 107(b) is a diagram showing the electronic device 80A viewed from diagonally above right on the rear side of the electronic device 80A. FIG. 108 is a diagram showing the electronic device 80A viewed from below. FIG. 109(a) is a diagram showing the electronic device 80A viewed from diagonally above right on the rear side of the electronic device 80A when the attachment angle is changed. FIG. 109(b) is a diagram showing the electronic device 80A viewed from diagonally above right on the rear side of the electronic device 80A when the attachment angle is changed. FIGS. 110 and 111 are diagrams showing the external configuration of the attachment member 960. The mounting member 960 includes a portion that can be bent in response to an external force, and remains in the bent state (shape) even after the external force is removed.

The mounting member 960 is a plate-like member formed from a metal such as aluminum. The mounting member 960 has a first portion 961, a second portion 962, a third portion 963, a fourth portion 964, a fifth portion 965, and a sixth portion 966. The first portion 961 is a plate-like portion. The longitudinal direction of the first portion 961 corresponds to the depth direction of the electronic device 80A. The longitudinal length of the first portion 961 is approximately the same as or longer than the depth direction length of the electronic device 80A. The top surface of the first portion 961 and the electronic device 80A are fixed using an adhesive such as double-sided tape, although fasteners or other methods may also be used. The sixth portion 966 is connected to one end of the first portion 961. The sixth portion 966 is configured to be bendable along the boundary portion 9661 and can change its position relative to the first portion 961 when subjected to an external force. The boundary portion 9661 is the portion that forms the boundary between the first portion 961 and the sixth portion 966. The boundary portion 9661 has a reduced width dimension to facilitate folding, and may also be provided with a hinge-like member.

In the state shown in Figures 107 and 108, the upper surfaces of the first portion 961 and the sixth portion 966 are on the same plane. In this case, the upper surfaces of the first portion 961 and the sixth portion 966 come into contact with the bottom surface of the electronic device 80A, thereby supporting the electronic device 80A. On the other hand, in the state shown in Figure 109, the sixth portion 966 is bent downward by approximately 180 degrees from the state shown in Figures 107 and 108, and comes into contact with the bottom surface of the first portion 961. In this case, the upper surface of the first portion 961 comes into contact with the bottom surface of the electronic device 80A, thereby supporting the electronic device 80A. The reason why these two states are possible will be explained later.

The second part 962 is a plate-like part connected to the first part 961 and approximately perpendicular to the first part 961. The height direction length of the second part 962 is approximately the same as or longer than the height direction length of the electronic device 80A. The second part 962 may support the electronic device 80A by having one surface contact the front of the electronic device 80A. The third part 963 is a plate-like part connected to the second part 962 and approximately perpendicular to the second part 962. The third part 963 has a surface approximately parallel to the first part 961, but its longitudinal dimension (corresponding to the depth direction of the electronic device 80A) is shorter than the depth direction dimension of the first part 961. The width direction (short side direction) dimensions of the second part 962 and the third part 963 are approximately the same. When the electronic device 80A is supported by being sandwiched on three sides by the first part 961 (and sixth part 966), the second part 962, and the third part 963, it can be expected that the electronic device 80A will be held more stably.

The fourth portion 964 is a plate-shaped portion connected to the third portion 963. The fourth portion 964 is configured to be bendable along the boundary portion 9641, and is capable of changing its position relative to the third portion 963 when subjected to an external force. The boundary portion 9641 is the portion that forms the boundary between the fourth portion 964 and the third portion 963. The boundary portion 9641 has a small width dimension to facilitate bending, and may also be provided with a hinge-like component.

The fifth portion 965 is a plate-shaped portion connected to the fourth portion 964. The upper surface of the fifth portion 965 serves as the mounting surface and is attached (e.g., affixed) to the mounting portion using a fixing member such as double-sided tape. The fifth portion 965 is configured to be bendable along the boundary portion 9651, and is capable of changing its orientation relative to the fourth portion 964 when subjected to an external force. The boundary portion 9651 is the portion that forms the boundary between the fifth portion 965 and the fourth portion 964. The boundary portion 9651 has a small width dimension to facilitate bending, but may also be provided with a hinge-like member. The orientation of the fourth portion 964 relative to the third portion 963 and the orientation of the fifth portion 965 relative to the fourth portion 964 can be adjusted depending on the shape of the mounting portion on the vehicle, in this embodiment, the inclination of the windshield.

Figure 112 shows a side view of electronic device 80A attached to a windshield using mounting member 960. Figure 112(a) shows the case where the windshield is tilted at an angle of 30 degrees relative to the horizontal, and Figure 112(b) shows the case where the windshield is tilted at an angle of 60 degrees relative to the horizontal.

In the example of Figure 112(a), the sixth portion 966 has its upper surface located on the same plane as the upper surface of the first portion 961. Furthermore, the electronic device 80A is placed on the upper surfaces of the first portion 961 and the sixth portion 966, and is placed as close to the windshield as possible. In this way, when the windshield has a relatively gentle slope, the electronic device 80A can be placed closer to the windshield. Therefore, it is easier for the electronic device 80A to receive the pulsed light Lout than, for example, when the sixth portion 966 does not exist.

On the other hand, in the example of Figure 112 (b), the sixth portion 966 is bent downward from the first portion 961. The electronic device 80A is disposed on the upper surface of the first portion 961 and is not in contact with the sixth portion 966. In this way, if the windshield is relatively steeply inclined, the sixth portion 966 moves the windshield downward, allowing the electronic device 80A to be positioned closer to the windshield. Therefore, compared to when the sixth portion 966 is not bendable, for example, the electronic device 80A can more easily receive the pulsed light Lout.

Therefore, by using the mounting member 960 for attachment, the electronic device 80A can be controlled to issue a more accurate alarm regardless of the tilt angle of the attachment portion of the vehicle. In addition, the use of the mounting member 960 also achieves the same effects as the use of the second mounting member 950. Note that even if the mounting member 960 is configured without the sixth portion 966, the mounting member 960 still functions to support the electronic device 80A.

17. Other Embodiments
A stay (dashboard mounting stay) that can be attached to the mounting portion 917 of the electronic device 900 described in [15. Other Embodiments] to secure the electronic device 900 to the dashboard may be used as the mounting member. As shown in FIG. 113 , the stay 970 is formed of a metal such as aluminum. The stay 970 includes a plate-shaped first portion 971 whose underside is attached to the dashboard using a fixing member such as an adhesive sheet or double-sided tape (main body double-sided tape), a plate-shaped second portion 972 that is perpendicular to the first portion 971, and a pair of protrusions 973 and 974 that protrude from the second portion 972 on both the left and right sides. The protrusion 973 protrudes further forward than the second portion 972 and protrudes to the right when viewed from the front. The protrusion 974 protrudes further forward than the second portion 972 and protrudes to the left when viewed from the front. The pair of protrusions 973, 974 can be attached to grooves 9171, 9172, respectively, of the attachment portion 917 of the electronic device 900. The stay 970 may be further fixed to the second housing 902 of the electronic device 900 using a fastener such as a screw.

In [15. Other Embodiments], [16: Other Present Embodiments], and [17: Other Present Embodiments], we have described cases where an electronic device without a display unit is attached to a dashboard or suspended in mid-air, but an electronic device with a display unit may also be attached to a dashboard or suspended in mid-air.

Figure 114 shows six views of the second mounting member 950 described above, and Figure 115 shows six views of the mounting member 960 described above. In Figures 114 and 115, the front view is shown in the center, with a top view (plan view) at the top, a left side view on the left, a right side view on the right, a bottom view at the bottom, and a rear view below the bottom view.

18. Modifications
(18-1) The condenser lens 300 may be a cylindrical lens or a linear Fresnel lens. In the latter case, the condenser lens 300 becomes thin. Also, two cylindrical lenses may be arranged crossing each other so as to form an image at a point on the light receiving element, or two linear Fresnel lenses may be arranged crossing each other.

(18-2) In the configuration of (18-1), a filter that extracts and passes light of a specific wavelength may be placed between the two lenses.

(18-3) In the configuration of (18-1), the focal position of only one of the lenses may be shifted from the position of the light receiving element.

(18-4) APD (avalanche photodiode), MPPC (multi-pixel photon counter), etc. may also be used as the light receiving element.

(18-5) The electronic device may use a prism or other device to disperse light and issue an alarm when the light is received by a light-receiving element at a specific wavelength (for example, 905 nm). Furthermore, light incident on a light-receiving element corresponding to a different wavelength may be treated as a source of a false alarm.

(18-6) A light receiving unit may be provided on the front of the electronic device to receive light from behind. For example, it may be compatible with tracking lasers (lasers from police cars). The electronic device may (a) use the reception of light from a tracking laser as a trigger to record rear camera footage for 10 seconds before and up to 1 minute after detection from behind is no longer possible. The electronic device may (b) change the content of the alarm depending on whether light is received from the front or rear. The electronic device may (c) receive either the light from the front or rear using a sensor guided by optical fiber.

(18-7) The electronic device may emit a predetermined sound (e.g., "Good sound!") when it receives radar waves a predetermined number of times (e.g., 21 times) per second.

(18-8) The electronic device may use image recognition from a camera (e.g., an in-vehicle camera 50) to recognize the type of speed camera and issue an alert about that type. When the user asks, "Was that a speed camera?", the electronic device may respond with "Yes" or "No" based on the image recognition results.

(18-9) The electronic device may be equipped with optical means (lens, etc.) that focuses the half-value angle of one incident light beam to approximately 3 degrees or less on each side (currently approximately 5 degrees), and receive light from the speed measurement device 30.

(18-10) Laser light from a speed enforcement device may be received using a light-receiving element with a sensor area of less than 1 mm. Currently, the sensor area is approximately 1 mm.

(18-11) Flocked paper may be attached or anti-reflective material may be applied to the area surrounding the optical path between the optical means (e.g., the condenser lens 300) and the light receiving element 410 (where black tape is currently located).

(18-12) A diaphragm element that narrows the optical path may be provided between the optical means (e.g., the condenser lens 300).

(18-13) The condenser lens 300 may have polished light entrance and exit surfaces. The degree of polishing of the entrance and exit surfaces may be different. It is preferable to process the exit surface so that it is not smooth.

(18-14) It is not necessary to provide a visible light blocking material on the outer surface of the housing. It is preferable to provide a transparent cover material on the outer surface of the housing. It is preferable to make at least some of the components of the band-pass filter visible when viewed from the outer surface of the housing. It is preferable to make at least some of the components of the light receiving element visible when viewed from the outer surface of the housing.

(18-15) The condenser lens 300 should be, for example, 3 mm or less at its thickest point. This improves transmittance.

(18-16) The condenser lens 300 may be molded in two colors using a visible light blocking material and a transparent material. For example, the lens may be formed from a transparent material, and a visible light blocking plate may be placed behind the lens. For example, a plate of one material may be used to press and secure a lens made from the other material to the housing. The condenser lens 300 and the lens holder that holds the condenser lens 300 may be integrally formed and brought into contact with the second substrate 1030, which has a surface perpendicular to the optical axis of the condenser lens 300 and a light receiving unit 400. The lens holder may have a surface, and when part of the holder is inserted into a hole in the second substrate 1030, the light receiving unit may be positioned at the optical axis (pressing the lens holder with the second substrate 1030 automatically aligns it with the optical axis, suppressing tilt).

(18-17) A hole corresponding to the center of the condenser lens 300 may be drilled on the lens holder side.

(18-18) The electronic device may record the spot dancing state of the laser light using an onboard camera. Recording should be from the start to the end of laser reception.

(18-19) For electronic devices, it is a good idea to use an in-car camera to record conditions such as fog. Recording should be done from the start to the end of receiving the pulsed light. Since infrared light is affected by water droplets, this is useful for identifying erroneous measurements.

(18-20) It is advisable to perform processing to output information from images captured by an onboard camera to determine whether an speed camera (fixed or mobile) was installed properly during measurements.

(18-21) If radar waves are detected for a certain period of time when an electronic device is turned on, a message such as "Is there another radar detector nearby? That product is emitting severe interference. Please move away." may be displayed.

19. Modifications of the Electronic Device Having Multiple Light-Receiving Elements of the First Embodiment, etc.
(19-1) The first wavelength selection unit 121 may be configured to include a band-pass filter instead of or in addition to the polarizing filter.

(19-2) The second wavelength selection unit 123 may be configured to include a filter instead of or in addition to a polarizing filter, so that when the pulsed light Lout detection level is high and the other light detection levels are low, it can be more reliably processed as indicating that an alarm is due.

(19-3) It is preferable that both the first light receiving element 122 and the second light receiving element 124 are used to detect pulsed light. In this case, it is preferable that both the first wavelength selecting unit 121 and the second wavelength selecting unit 123 are filters with characteristics for selecting and receiving light of a specific wavelength.

(19-4) A cylindrical lens (sized to maintain the width of the existing housing window) may be provided so as to span the two first light receiving elements 122 and the second light receiving elements 124 (for example, so that the semi-cylindrical lens is oriented horizontally). A light intensity detection balance circuit, which outputs zero when the amount of light entering the two light receiving elements is equal, may be added to the existing level detection section to detect signals from the two first light receiving elements 122 and the second light receiving element 124. When the signals from the two photodiodes rise simultaneously, they are detected by a circuit that can detect with high sensitivity.

(19-5) The partition (shield) between the first light receiving element 122 and the second light receiving element 124 may be removed. This shortens the distance between the two photodiodes, minimizing the need for changes to the housing structure and improving detection sensitivity.

(19-6) Patent Publication No. 6161429 describes how two laser light sources are incident on a polygon mirror and reflected, causing the laser irradiation direction to scan a wide area horizontally with the polygon mirror as the center, and that the laser oscillation is set to occur at intervals of, for example, 0.25°, and that the light is received by four light receiving elements. The data obtained from the scanning laser sensor is a distance distribution in a polar coordinate system around the sensor, and this data is acquired at a cycle of 12.5 Hz (80 ms). If a light pattern corresponding to these parameters is detected, a warning is issued that it is a laser speed camera. In particular, it is advisable to identify that a laser from a specific manufacturer has been detected and issue a warning to that effect.

20. Other Embodiments
As shown in FIG. 118 , electronic devices may be equipped with radar sensitivity settings of “OFF” and “AAC/CUSTOM (Custom).” “OFF” disables alarms even when radar signals are received. Custom allows for detailed settings, as described below. Conventionally, there was no setting to disable the alarm display or audible alarm. Therefore, for example, by setting the vehicle speed or alarm level to a minimum, the number of alarms would be reduced, resulting in fewer false alarms. The relationship between modes and notification control is shown in FIG. 118 . The alarm speed setting can be set to 11 levels, for example, 0, 10, 20, 30, 40, 50, 60, 70, 80, 90, and 100 km/h or higher. The alarm level setting can be set to five levels: ALL (alerts at all levels), level 2 or higher, level 3 or higher, level 4 or higher, and level 5 only. For example, in urban areas, where there are many sources of false alarms, it is advisable to prevent alarms below a certain level from being issued. Electronic devices may display an alarm without sounding an alarm. The electronic device may also reduce the volume of the alarm sound when radar waves/laser light continues to be received for approximately 30 seconds or more. The alarm sound may also be emitted as shown in FIG.

21. Other Embodiments
Image recognition may be used to realize an "undercover police alarm." Currently, undercover police cars (tailgating speed enforcement) approach vehicles from behind. While such undercover police cars cannot be easily identified by their appearance, they do have several characteristics. Therefore, an "undercover police alarm" may be issued using these characteristics and location information of the enforcement location. For example, an electronic device may issue an alarm if it recognizes the above characteristics when the current location information has a predetermined proximity relationship with the location information of a public enforcement location or enforcement point of interest (POI). Based on the characteristics, such as vehicle characteristics (e.g., a specific vehicle model), the presence of two people in blue uniforms, license plate number (starting with a specific number), the number of occupants, whether the vehicle is being followed, and differences in the vehicle's behavior before and after overtaking, it is possible to improve the accuracy of the alarm to one in ten or one in five times.

22. Modifications
The present disclosure is not limited to the above-described embodiments, and can be modified as appropriate within the scope of the present disclosure.

(Variation 1)
The control unit 11 may determine the presence or absence of a speed measurement device based on a digital value corresponding to the amount of received light for optical systems, or an analog value corresponding to the received radio waves for radar systems. This is because the intensity of radio waves may change more gradually with distance than the intensity of light. The control unit 11 may also determine the presence or absence of light or microwave reception by varying the duration of pulsed light reception or microwave reception, such as 3 seconds for optical systems and 1 second for radar systems. These durations may also be the same.

(Variation 2)
The electronic device 10 may have a dedicated light-emitting unit for notifying the presence of an optical speed measurement device when it detects the presence of the device. In this case, the electronic device 10 does not light up this light-emitting unit to notify the presence of other types of speed measurement devices. The electronic device 10 may also not light up this light-emitting unit when it detects the presence of an optical speed measurement device. Furthermore, the electronic device 10 may light up the light-emitting unit in a color or pattern specific to the case when it detects the presence of an optical speed measurement device. This light-emitting unit may be the light-emitting unit 23 or a separate light-emitting unit.

(Variation 3)
The first wavelength selecting unit 121 and the second wavelength selecting unit 123 do not have to be band-pass filters. The first wavelength selecting unit 121 and the second wavelength selecting unit 123 may be configured, for example, by a combination of a low-pass filter and a high-pass filter. Furthermore, the second wavelength selecting unit 123 may be a low-pass filter, as shown by the characteristic in FIG. 118( a). In this example, the second wavelength selecting unit 123 transmits light in a wavelength region lower than the wavelength λ2a and blocks light in a wavelength region higher than the wavelength λ2a. The second wavelength selecting unit 123 may be a high-pass filter, as shown by the characteristic in FIG. 118( b). In this example, the second wavelength selecting unit 123 transmits light in a wavelength region higher than the wavelength λ2b and blocks light in a wavelength region lower than the wavelength λ2b. Even in this case, the amount of received light of the second signal Sig2 is extremely small during the period in which the pulsed light Lout is received. The light receiving unit 12 receives not only the pulsed light Lout, which is the target of light reception, but also disturbance light. However, such disturbance light generally has a wide wavelength range in which its energy is distributed. Therefore, even when the light receiving unit 12 receives disturbance light that periodically turns on and off, the amount of received light is likely to be large. Therefore, if the amount of received light of the first signal Sig1 is large and the amount of received light of the second signal Sig2 is small, i.e., the difference is equal to or greater than the threshold, it can be assumed that pulsed light Lout has been received. On the other hand, if the amount of received light of the first signal Sig1 is large and the amount of received light of the second signal Sig2 is also large, i.e., the difference is less than the threshold, it can be assumed that pulsed light Lout has not been received. Therefore, according to the electronic device 10, by receiving light using the first light receiving element 122 and the second light receiving element 124, it is expected that the detection accuracy of the speed measurement device 30 can be improved. Furthermore, the first wavelength selecting section 121 and the second wavelength selecting section 123 may be configured using optical elements other than filters, such as prisms.

(Variation 4)
In the above-described embodiment, the light receiving unit 12 includes two elements, the first light receiving element 122 and the second light receiving element 124. However, the light receiving unit 12 may include only one element. FIG. 119 is a diagram showing the configuration of an electronic device 10 according to this modification. In this example, the light receiving unit 12 does not include the first light receiving element 122 or the second light receiving element 124, but includes a light receiving element 128. The light receiving element 128 may have the same configuration as the first light receiving element 122 or the second light receiving element 124. The electronic device 10 according to this modification also includes a drive unit 60. The drive unit 60 moves the first wavelength selection unit 121 and the second wavelength selection unit 123 under the control of the control unit 11. The drive unit 60 includes, for example, a motor and a gear. During operation of the electronic device 10, the control unit 11 moves the first wavelength selection unit 121 and the second wavelength selection unit 123 so as to alternately cover the light receiving surface of the light receiving element 128. That is, as shown in FIG. 120( a), the control unit 11 first provides the first wavelength selection unit 121 on the light-receiving surface of the light-receiving element 128. Then, the control unit 11 obtains the signal obtained from the light-receiving element 128 at this time as the first signal Sig1. Next, as shown in FIG. 120( b), the control unit 11 first moves the first wavelength selection unit 121 away from the light-receiving surface of the light-receiving element 128 and provides the second wavelength selection unit 123 on the light-receiving surface. Then, the control unit 11 obtains the signal obtained from the light-receiving element 128 at this time as the second signal Sig2. Then, the control unit 11 detects the speed measurement device 30 based on the first signal Sig1 and the second signal Sig2.

(Variation 5)
In the above-described embodiment, the light receiving unit 12 has two light receiving elements, the first light receiving element 122 and the second light receiving element 124, but it may have three or more light receiving elements. Even in this case, the control unit 11 can select different wavelength ranges of light for each of the three or more light receiving elements, which is expected to improve the detection accuracy of the speed measurement device 30.

(Variation 6)
In the above description, the light receiving unit 12 includes at least one set of a wavelength selection unit and a light receiving element. Alternatively, the light receiving unit 12 may include at least one light receiving element without including a wavelength selection unit. For example, the light receiving unit 12 may receive a third amount of light when a specific wavelength is selected and received, instead of the second amount of light, which is the amount of light of a wavelength different from the specific wavelength. In this case, the control unit 11 may perform control to notify the presence of the speed measurement device 30 based on the second amount of light and the third amount of light.

Alternatively, the light receiving unit 12 may receive incident light using a single light receiving element. The control unit 11 may then perform control to notify the presence of the speed measurement device 30 based on a pulse width or pulse interval determined based on the amount of light received by the light receiving unit 12. The method using the pulse width or pulse interval may be the same as the modified example of the first embodiment described above. The control unit 11 may perform control to notify the presence of the speed measurement device 30 if pulsed light Lout of at least one waveform is received.

(Variation 7)
The light receiving element may be an imaging element included in a camera such as a drive recorder. For example, the control unit 11 acquires an image captured by the in-vehicle camera 50 and performs image analysis. The in-vehicle camera is preferably a camera without an infrared cut filter so as not to block the pulsed light Lout. If the image analysis reveals that a specific pattern of light is received, the control unit 11 performs control to notify the presence of the speed measurement device 30. The control unit 11 may detect the specific pattern of light based on a change in brightness indicating that the light has a specific wavelength. When the specific pattern of light is received, the control unit 11 may record the captured image for a period corresponding to the light reception period. This period may be, for example, one minute before and after the timing at which the specific pattern of light is received, but is not limited to this.

(Variation 8)
The electronic device 10 may detect the speed measurement device 30 behind the vehicle 40. In this case, the light receiving unit 12 may be disposed so as to be able to receive pulsed light from the vehicle 40.

(Variation 9)
When the electronic device 10 detects the speed measurement device 30, it is preferable that the electronic device 10 uploads information such as location information indicating the location of the speed measurement device 30 to a server. The server may be a server that provides a social networking service, or a server that manages and distributes updated information regarding objects to be notified.

The user may be queried in advance or at each detection or transmission time about whether or not the electronic device 10 is to transmit location information. Obtaining prior consent reduces the burden on the user. The server may store location information and distribute it to other electronic devices 10. When the electronic device receives location information from the server, it issues a notification when it approaches the location indicated by the location information. Notifications may be issued using the methods already described, but the control unit 11 may also display, for example, an icon as information clearly indicating that the notification is based on posted information. Notifications based on posted information may also be issued only within a specified period from the detection of the presence of a speed measurement device or the transmission of location information. This is because enforcement is often carried out at set times.

In addition to detecting speed measurement devices, the system disclosed herein can also be used to detect light-emitting devices that emit light of specific wavelengths.

(Variation 10)
Some of the configurations and operations described in the above-described embodiments may be omitted or modified. For example, the electronic device 10 may be an optical device that does not support a radar system. Furthermore, the positions, shapes, and sizes of the components in the electronic device 10 are merely examples. Furthermore, the light receiving unit 12 may be provided outside the electronic device 10. For example, the light receiving unit 12 may be provided at a predetermined position on the vehicle 40, such as inside the license plate, hood, door mirror, or grille. In this case, the control unit 11 may acquire a signal from the light receiving unit 12 via the communication unit 17.

(Modification 11)
Furthermore, the control unit 11 may determine whether or not the speed measurement device 30 is present, and if it determines that at least the speed measurement device 30 is present, may output a signal indicating the determination result to an external device. This external device may notify the presence of the speed measurement device 30. The present invention may also be specified by a control device (for example, a control module) incorporated into the electronic device 10 that has the same functions as the control unit 11.

(Variation 12)
The GPS receiver in the above-described embodiment can be interpreted as a GNSS receiver having an antenna for receiving signals from a Global Navigation Satellite System (GNSS) and a processing circuit for processing the received signals. Positioning using the GNSS is commonly known as GPS positioning. The location information obtained by the positioning process using the GNSS receiver is information that represents the location of the electronic device 10 in coordinate format and includes at least latitude and longitude information.

(Variation 13)
An electronic device using the above-described lens (e.g., focusing lens 300, 950) may be equipped with a variable lens angle function. This allows for compensation of deviations between the laser reception field of view angle and the vehicle's traveling direction. For example, the electronic device may be configured such that a lens device equipped with a lens is attached to a housing with a mechanism that can change the orientation of the lens device up and down and/or left and right. In this way, the user can adjust the orientation of the lens device so that the lens is pointed in the desired direction.

The scope of the present invention is not limited to the configurations expressly described in the specification, but also encompasses combinations of various aspects of the invention disclosed herein. While the configurations of the invention sought to be patented are specified in the accompanying claims, it is the intention of the Company to claim configurations disclosed herein in the future, even if they are not currently specified in the claims.

The present invention is not limited to the configurations described in the above-described embodiments. The components of each of the above-described embodiments and variations may be arbitrarily selected and combined. Furthermore, any component of each embodiment or variation may be arbitrarily combined with any component described in the Summary of the Invention or any component embodying any component described in the Summary of the Invention. It is our intention to obtain rights to these as well through amendments to this application or divisional applications, etc. Furthermore, even if there is a statement such as "in the case of..." or "when...," this does not mean that the configuration is limited to that case or time. Configurations that are not limited to those cases or times are also disclosed, and we intend to obtain rights to them. Furthermore, any descriptions that specify an order are not limited to this order. Configurations in which some parts are deleted or the order is changed are also disclosed, and we intend to obtain rights to them.

Furthermore, by filing a conversion application to a design application, it is intended to obtain rights to the overall design or partial design. The drawings depict the entire device using solid lines, but they also include partial designs claimed for parts of the device. For example, it is not only possible to make a part of the device a partial design, but the drawings also include a part of the device as a partial design regardless of the part. A part of the device may be a part of the device, or it may be part of that part. It is intended to obtain rights not only to the overall design, but also to partial designs in which any part of the solid line portion of the drawings is made into a dashed line.

10: Electronic device 10A: Electronic device 11: Control unit 12: Light receiving unit 12A: Light receiving unit 12B: Light receiving unit 12C: Light receiving unit 13: Display unit 14: Speaker 15: Microwave receiving unit 16: GPS receiving unit 17: Communication unit 18: Memory unit 19: Operation unit 20: Sensor unit 21: Mounting unit 22: Power supply unit 23: Light emitting unit 24: Cable terminal unit 30: Speed measurement device 31: Speed measurement unit 32: Imaging unit 33: Strobe 40: Vehicle 41: Dashboard 42: Windshield 43: Rearview mirror 50: In-vehicle camera 60: Drive unit 70: Camera 80: Electronic device 80A: Electronic device 81: Cable 90: Sensor device 100: Housing 100A: Housing 101: First window 102: Second window 103: Partition 104: Region 121: First wavelength selection unit 122: First light receiving element 123: Second wavelength selection unit 124: Second light receiving element 125: Interface 126: Visible light cut filter 127: Visible light cut filter 128: Light receiving element 171: Wireless module 201: Illuminance sensor 221: Power switch 222: DC jack 223: Button battery 250: Filter 270: Shield plate 300: Condenser lens 310: Incident surface 311: Curved surface 312: Emitting surface 313: Flat surface 314A: Leg 314B: Leg 400: Light receiving unit 410: Light receiving element 430: Differential amplifier 440: Differential amplifier 500: Reflecting unit 600: Reflecting unit 801: First housing 802: Second housing 803 : Cover portion 810: First substrate 820: Second substrate 830: Third substrate 840: Fourth substrate 841: Light receiving portion 842: Light transmitting portion 843: Light receiving element 850: Antenna portion 851: Processing circuit 860: GPS receiving portion 870: Filter 880: Shield plate 900: Electronic device 900A: Housing 901: First housing 902: Second housing 911: Light emitting portion 912: Operation portion 913: Speaker 913A: Sound emitting portion 914: DC jack 915: Lens holder 916: Control portion 917: Mounting portion 918: Screw 919: Screw 920: Condenser lens 920A: Light receiving portion 921: Light receiving element 930: Substrate 931: Light receiving element 932: Light transmitting portion 933: Filter 934: Shield plate 935: Shield case 936: Shield case 940: First mounting member 941: Base portion 942: Socket portion 943: Ball stud 944: Mounting portion 950: Second mounting member 951: First portion 952: Second portion 953: Third portion 960: Mounting member 961: First portion 962: Second portion 963: Third portion 964: Fourth portion 965: Fifth portion 966: Sixth portion 970: Stay 971: First portion 972: Second portion 973: Protrusion 974: Protrusion 1001: First housing 1002: Second housing 1002A: Second housing 1003: Lid portion 1006: Lens holder 1010: First board 1030: Second board 1031: Shield case 1033: Light-transmitting portion 1331: Control circuit

Claims (2)

An electronic device for detecting a speed measurement device that is installed in a vehicle and scans pulsed light of a specific wavelength from a light emitting window of the speed measurement device at regular intervals ,
a control unit that performs control to increase the notification level during a period in which the number of pulsed light received by the light receiving unit is equal to or greater than a threshold value, or during a period in which the number of pulses received by the light receiving unit is increasing ;
A period in which the pulsed light is emitted and a period in which the pulsed light is not emitted alternately exist .
electronic equipment. A program for causing a computer to implement the functions of the control unit of the electronic device described in claim 1.