JP6405165B2 - Magnetic detection device and display device - Google Patents

Description

  The present invention relates to a magnetic detection device and a display device.

  A device that installs a magnetic sensor in the vicinity of the magnetic field generation source in order to monitor the state and change of the magnetic field around the magnetic field generation source, performs information processing based on the output of the magnetic sensor, and outputs the result to the display device Is disclosed (see Patent Document 1).

JP-A-9-243725

  However, in the above device, the display device is far away from the magnetic field generation source. Therefore, there is a problem that it is difficult for the observer to intuitively understand what kind of magnetic field is generated in the vicinity of the magnetic field generation source simply by looking at the screen of the display device.

  The present invention has been made in view of such problems, and an object thereof is to provide a magnetic detection device and a display device capable of intuitively grasping the state and change of the magnetic field in the vicinity of the magnetic field generation source. It is in.

A first display device of the present invention includes a circuit board having a mounting surface on the front surface and a projection surface on the back surface, a plurality of magnetic detection elements mounted on the mounting surface, and detection signals of the magnetic detection elements. And an information processing unit that generates a video signal by processing. The first display device further includes a projection device that generates projection light based on the video signal and radiates the generated projection light toward the projection surface.

  In the first display device of the present invention, the back surface of the circuit board is the projection surface. Thereby, the video based on the video signal can be projected onto the back surface of the circuit board by the projection device.

  The second display device of the present invention is a circuit board having a mounting surface on a surface thereof, a plurality of magnetic detection elements mounted on the mounting surface, and processing a detection signal of each magnetic detection element, thereby processing a video signal. And an information processing unit to be generated. The second display device further includes a light-transmitting substrate provided between the user's eyeball and the back surface of the circuit board, a video based on the video signal, the surface of the light-transmitting substrate, and the user Includes a projection device that projects onto a region where the back surface of the circuit board can be visually recognized.

  In the second display device of the present invention, the surface of the light-transmitting substrate provided between the user's eyeball and the back surface of the circuit board is a projection plane. Accordingly, an image based on the image signal can be projected onto the surface of the light transmissive substrate by the projection device.

  A third display device of the present invention is a circuit board having a mounting surface on a surface thereof, a plurality of magnetic detection elements mounted on the mounting surface, and processing a detection signal of each magnetic detection element, thereby processing a video signal. And an information processing unit to be generated. The third display device is further provided at a position facing the back surface of the circuit board, and displays a video based on a video signal, and a magnet provided between the back surface of the circuit board and the display panel. It has a shield.

  In the third display device of the present invention, the display panel is provided at a position facing the back surface of the circuit board. Thereby, the video based on the video signal can be displayed on the display panel.

  According to the magnetic detection device of the present invention, an image based on the video signal obtained as a result of processing the detection signal by the information processing unit or the like can be projected onto the back surface of the circuit board by the projection device. The state and change of the nearby magnetic field can be projected on the back surface of the circuit board. Therefore, the observer can intuitively grasp the state and change of the magnetic field in the vicinity of the magnetic field generation source by arranging the circuit board in the vicinity of the magnetic field generation source and projecting an image on the back surface of the circuit board. it can.

  According to the first display device of the present invention, since the image based on the video signal can be projected onto the back surface of the circuit board by the projection device, the state and change of the magnetic field in the vicinity of the circuit board can be detected. Can be projected on the back of the screen. Therefore, the observer can intuitively grasp the state and change of the magnetic field in the vicinity of the magnetic field generation source by arranging the circuit board in the vicinity of the magnetic field generation source and projecting an image on the back surface of the circuit board. it can.

  According to the second display device of the present invention, since the image based on the video signal can be projected onto the surface of the light transmissive substrate by the projection device, the state or change of the magnetic field in the vicinity of the circuit board It can be projected on the surface of the light transmissive substrate. Therefore, the observer places the circuit board in the vicinity of the magnetic field generation source, and visually recognizes the back surface of the circuit board through the image projected on the surface of the light-transmitting substrate. It is possible to grasp the state and changes intuitively.

  According to the third display device of the present invention, since the video based on the video signal can be displayed on the display panel provided at the position facing the back surface of the circuit board, the magnetic field in the vicinity of the circuit board can be displayed. Status and changes can be displayed on the display panel. Therefore, the observer can intuitively grasp the state and change of the magnetic field in the vicinity of the magnetic field generation source by arranging the circuit board in the vicinity of the magnetic field generation source and displaying the video on the display panel.

It is a figure showing an example of schematic structure of the display apparatus of a 1st embodiment of the present invention. It is a figure showing an example of schematic structure of the display apparatus of the 2nd Embodiment of this invention. It is a figure showing an example of schematic structure of the display apparatus of the 3rd Embodiment of this invention.

Hereinafter, embodiments for carrying out the present invention will be described in detail with reference to the drawings. The description will be given in the following order.

1. 1. First embodiment An example in which the back surface of a circuit board is a projection surface. 2. Second Embodiment An example in which the surface of a light transmissive substrate is a projection surface. Third Embodiment Example in which a display panel is provided on the back surface of a circuit board

<1. First Embodiment>
[Constitution]
The display device 1 according to the first embodiment of the present invention will be described. FIG. 1 illustrates an example of a schematic configuration of the display device 1. The display device 1 measures and displays the state and change of the magnetic field in the vicinity of the magnetic field generation source. Examples of the magnetic field generation source include a welding electrode, a wireless power feeding device, an IH (Induction Heating) inverter, and a transformer in a welding robot system.

  The display device 1 includes a magnetic detection device 10, a signal processing unit 20, and a projection device 30. The display device 1 further includes a cable C1 that connects the magnetic detection device 10 and the signal processing unit 20 to each other, and a cable C2 that connects the signal processing unit 20 and the projection device 30 to each other. When wireless communication is possible between the magnetic detection device 10 and the signal processing unit 20, the cable C1 can be omitted. When wireless communication is possible between the signal processing unit 20 and the projection device 30, the cable C2 can be omitted.

  The magnetic detection device 10 includes a circuit board 11, a plurality of magnetic detection elements 12, a data transmission unit 13, and a magnetic shield layer 14. Note that the data transmission unit 13 or an apparatus including the data transmission unit 13 and the signal processing unit 20 corresponds to a specific example of the “information processing unit” of the present invention. The circuit board 11 includes, for example, a resin board. The circuit board 11 has a mounting surface S1 of the plurality of magnetic detection elements 12 on the front surface, and a projection surface S2 on the back surface. The plurality of magnetic detection elements 12 are mounted on the mounting surface S <b> 1 of the circuit board 11. The circuit board 11 has a plurality of electrode pads (not shown) assigned to the mounting surface S1 one by one or a plurality for each magnetic detection element 12. The circuit board 11 has a plurality of wirings (not shown) for connecting the electrode pads and the data transmission unit 13 to each other on the mounting surface S1 or inside the circuit board 11. The circuit board 11 has a magnetic shield layer (not shown) that suppresses leakage of a magnetic field generated by the wiring to the mounting surface S1 side in a layer between each magnetic detection element 12 and the wiring. It may be.

  The projection surface S2 is a surface on which the projection light 30A from the projection device 30 is projected. The projection surface S2 is configured so that an image generated on the projection surface S2 when the projection light 30A based on the image signal 20A described later is projected onto the projection surface S2 has a contrast that allows an observer to visually recognize the image. Yes. The projection surface S2 is, for example, a scattering reflection surface. The projection surface S2 may be configured by, for example, a scattering reflective film. The color of the scattering reflective surface or the surface of the scattering reflective film is, for example, white.

  The plurality of magnetic detection elements 12 detect a magnetic field near the mounting surface S1 and output a detection signal corresponding to the magnitude of the detected magnetic field. The data transmission unit 13 transmits the measurement signal 13A generated based on the detection signal of each magnetic detection element 12 to the signal processing unit 20. For example, the data transmission unit 13 is mounted on the mounting surface S1. The magnetic shield layer 14 covers the data transmission unit 13 and reduces leakage of the magnetic field generated by the data transmission unit 13 to the outside. The magnetic shield layer 14 is made of, for example, a soft magnetic material. The magnetic shield layer 14 can be omitted as necessary.

  The signal processing unit 20 processes the measurement signal 13A from the data transmission unit 13 to generate a video signal 20A. The video signal 20A is for generating a video image on the projection surface S2. The video generated by the video signal 20A can include, for example, various types that express a magnetic field, such as a magnetic vector, a magnetic field line, or a magnetic density distribution.

  The projection device 30 projects an image on the projection surface S2 based on the image signal 20A. Specifically, the projection device 30 generates the projection light 30A based on the video signal 20A, radiates the generated projection light 30A toward the projection surface S2, and reflects / scatters the projection light 30A on the projection surface S2. By doing so, an image corresponding to the projection light 30A is projected onto the projection surface S2. The signal processing unit 20 and the projection device 30 are provided separately from the magnetic detection device 10 and are arranged with a predetermined gap from the magnetic detection device 10.

[effect]
Next, the effect of the display device 1 will be described.

  In the display device 1, the back surface of the circuit board 11 is the projection surface S2. Thereby, an image based on the image signal 20 </ b> A can be projected onto the back surface of the circuit board 11 by the projection device 30. Thereby, the state and change of the magnetic field in the vicinity of the circuit board 11 can be projected on the back surface of the circuit board 11. Accordingly, the observer intuitively grasps the state and change of the magnetic field in the vicinity of the magnetic field generation source by arranging the circuit board 11 in the vicinity of the magnetic field generation source and projecting an image on the back surface of the circuit board 11. be able to.

  In the display device 1, the signal processing unit 20 and the projection device 30 are arranged away from the circuit board 11. Thereby, it is possible to reduce the influence of magnetism generated from the signal processing unit 20 and the projection device 30 on the magnetic detection element 12. Thereby, a magnetic field can be measured correctly.

  In the display device 1, when the magnetic shield layer 14 is provided, or when the magnetic shield layer is provided in a layer between each magnetic detection element 12 and the wiring, the data transmission unit 13. In addition, leakage of magnetism generated from the wiring to the mounting surface S1 side can be reduced. Thereby, a magnetic field can be measured more accurately.

<2. Second Embodiment>
Next, the display device 2 according to the second embodiment of the present invention will be described. In the following description, the same reference numerals as those in the above embodiment are given to components common to those in the above embodiment. Therefore, in the following, constituent elements different from the above-described embodiment will be mainly described, and description of constituent elements common to the above-described embodiments will be appropriately omitted.

[Constitution]
FIG. 2 illustrates an example of a schematic configuration of the display device 2. The display device 2 measures and displays the state and change of the magnetic field in the vicinity of the magnetic field generation source. The display device 2 includes a magnetic detection device 10, a signal processing unit 20, and a wearable display 40. The display device 2 further includes a cable C1 and a cable C3 that connects the signal processing unit 20 and the wearable display 40 to each other. When wireless communication is possible between the magnetic detection device 10 and the signal processing unit 20, the cable C1 can be omitted. When wireless communication is possible between the signal processing unit 20 and the wearable display 40, the cable C3 can be omitted.

  The circuit board 11 has a mounting surface S1 on the front surface and an indirect projection surface S3 on the back surface. The indirect projection surface S3 has the same configuration as the projection surface S2, for example, but is not a surface on which the projection light is directly projected. The indirect projection surface S3 is, for example, a scattering reflection surface. The indirect projection surface S3 may be configured by, for example, a scattering reflective film. The indirect projection surface S3 is configured so that the image generated on the indirect projection surface S3 when the projection light is projected onto the indirect projection surface S3 has a contrast that can be viewed by the observer (user 100). ing. The indirect projection surface S3 is, for example, a white scattering reflective surface. The indirect projection surface S3 may be constituted by, for example, a white scattering reflective film.

  The wearable display 40 includes a pair of light transmissive substrates 41, a projection device 42, and a frame body 43 that supports the pair of light transmissive substrates 41 and the projection device 42. The projection device 42 is assigned to one light transmissive substrate 41. The wearable display 40 may further include a projection device 42 assigned to the other light transmissive substrate 41 as necessary.

  The wearable display 40 is attached to the head of the user 100 in the manner of wearing glasses. When the wearable display 40 is worn on the head of the user 100 in the manner of wearing glasses, one light transmissive substrate 41 is disposed in front of each eyeball 110 of the user 100. That is, when the wearable display 40 is used, each light transmissive substrate 41 is provided between the eyeball 110 of the user 100 and the back surface of the circuit board 11. The light transmissive substrate 41 is formed of a substrate having a property of transmitting visible light, and is formed of, for example, a transparent resin substrate or a transparent glass substrate. Of the pair of light transmissive substrates 41, the surface closer to the eyeball 110 in the light transmissive substrate 41 to which the projection device 42 is assigned is the projection plane S4.

  The projection surface S4 is a surface on which the projection light 42A from the projection device 42 is projected. The projection surface S4 is made of, for example, a half mirror or a holographic optical element, and has a property of reflecting the projection light 42A and transmitting the reflected light from the indirect projection surface S3. The half mirror is composed of, for example, an optical multilayer film. The holographic optical element is composed of fine irregularities formed on the surface of the light-transmitting substrate 41, for example. When the magnetic field generation source is, for example, a welding electrode of a welding robot system, arc light is generated during welding. Therefore, in order to protect each eyeball 110 from arc light, each light-transmissive substrate 41 may have a filter function that attenuates arc light.

  The projection device 42 projects an image on the projection surface S4 based on the image signal 20A. Specifically, the projection device 42 projects onto the surface of the light transmissive substrate 41 and the area where the user 100 can visually recognize the back surface (particularly the indirect projection surface S3) of the circuit board 11. . Specifically, the projection device 42 generates projection light 42A based on the video signal 20A, radiates the generated projection light 42A toward the projection surface S4, and reflects the projection light 42A on the projection surface S4. Thus, an image corresponding to the projection light 42A is projected onto the projection surface S4. The signal processing unit 20 and the projection device 42 are provided separately from the magnetic detection device 10, and are arranged with a predetermined gap from the magnetic detection device 10.

[effect]
Next, the effect of the display device 2 will be described.

  In the display device 2, the surface of the light transmissive substrate 41 provided between the eyeball 110 of the user 100 and the back surface of the circuit board 11 is a projection plane S <b> 4. Thereby, an image based on the image signal 20 </ b> A can be projected onto the surface of the light transmissive substrate 41 by the projection device 42. As a result, the state and change of the magnetic field in the vicinity of the circuit board 11 can be reflected on the surface of the light transmissive substrate 41. Therefore, the user 100 arranges the circuit board 11 in the vicinity of the magnetic field generation source, and visually recognizes the back surface of the circuit board 11 through the image projected on the front surface of the light-transmitting substrate 41, thereby making the vicinity of the magnetic field generation source. It is possible to intuitively grasp the state and change of the magnetic field.

  In the display device 2, the signal processing unit 20 and the projection device 42 are arranged away from the circuit board 11. Thereby, it is possible to reduce the influence of magnetism generated from the signal processing unit 20 and the projection device 42 on the magnetic detection element 12. Thereby, a magnetic field can be measured correctly.

  In the display device 2, when the magnetic shield layer 14 is provided, or when a magnetic shield layer is provided in a layer between each magnetic detection element 12 and the wiring, the data transmission unit 13. In addition, leakage of magnetism generated from the wiring to the mounting surface S1 side can be reduced. Thereby, a magnetic field can be measured more accurately.

  In the display device 2, when each light-transmitting substrate 41 has a filter function for attenuating arc light, the user 100 protects each eyeball 110 from arc light while The state and change of the nearby magnetic field can be observed.

<3. Third Embodiment>
Next, the display device 3 according to the third embodiment of the present invention will be described. In the following description, the same reference numerals as those in the above embodiment are given to components common to those in the above embodiment. Therefore, in the following, constituent elements different from the above-described embodiment will be mainly described, and description of constituent elements common to the above-described embodiments will be appropriately omitted.

[Constitution]
FIG. 3 illustrates an example of a schematic configuration of the display device 3. The display device 3 measures and displays the state and change of the magnetic field in the vicinity of the magnetic field generation source. The display device 3 includes a magnetic detection device 50, a signal processing unit 20, a display panel 60, and a magnetic shield 70. The display device 3 further includes a cable C4 that connects the magnetic detection device 50 and the signal processing unit 20 to each other, and a cable C5 that connects the signal processing unit 20 and the display panel 60 to each other. The magnetic detection device 50 and the display panel 60 are bonded to each other via a magnetic shield 70. The signal processing unit 20 is disposed, for example, at a position facing the back surface of a circuit board 51 (described later) via the magnetic shield 70. The signal processing unit 20 may be arranged at a position away from the circuit board 51. When wireless communication is possible between the magnetic detection device 50 and the signal processing unit 20, the cable C4 can be omitted. When wireless communication is possible between the signal processing unit 20 and the display panel 60, the cable C5 can be omitted.

  The magnetic detection device 50 includes a circuit board 51, a plurality of magnetic detection elements 12, a data transmission unit 13, and a magnetic shield layer 14. The circuit board 51 includes, for example, a resin board. The circuit board 51 has mounting surfaces S5 for the plurality of magnetic detection elements 12 on the surface. The plurality of magnetic detection elements 12 are mounted on the mounting surface S <b> 5 of the circuit board 51. The circuit board 51 has a plurality of electrode pads (not shown) allocated to the mounting surface S5 one by one or a plurality for each magnetic detection element 12. The circuit board 51 has a plurality of wirings (not shown) for connecting the electrode pads and the data transmission unit 13 to each other on the mounting surface S5 or inside the circuit board 51. The circuit board 61 has a magnetic shield layer (not shown) that suppresses leakage of a magnetic field generated by the wiring to the mounting surface S6 side in a layer between each magnetic detection element 12 and the wiring. It may be.

  The plurality of magnetic detection elements 12 detect a magnetic field in the vicinity of the mounting surface S5 and output a detection signal corresponding to the magnitude of the detected magnetic field. The data transmission unit 13 transmits the measurement signal 13A generated based on the detection signal of each magnetic detection element 12 to the signal processing unit 20. The data transmission unit 13 is mounted on the mounting surface S5, for example. The display panel 60 is provided at a position facing the back surface of the circuit board 61 through the magnetic shield 70. The display panel 60 displays an image on the display surface S6 based on the image signal 20A. The magnetic shield 70 is provided between the back surface of the circuit board 61 and the display panel 60. The magnetic shield 70 reduces the leakage of the magnetic field generated in the display panel 60 to the mounting surface S5 side. The magnetic shield 70 is made of, for example, a soft magnetic material. The magnetic shield 70 may be built in the display panel 60. The signal processing unit 20 processes the measurement signal 13A from the data transmission unit 13 to generate a video signal 20A. The video signal 20A is for generating a video on the display surface S6. The video generated by the video signal 20A can include, for example, various types that express a magnetic field, such as a magnetic vector, a magnetic field line, or a magnetic density distribution.

[effect]
Next, the effect of the display device 3 will be described.

  In the display device 3, the display panel 60 is provided at a position facing the back surface of the circuit board 61. Thereby, the video based on the video signal 20 </ b> A can be displayed on the display panel 60. Thereby, the state and change of the magnetic field in the vicinity of the circuit board 61 can be displayed on the display panel 60. Therefore, the observer can intuitively grasp the state and change of the magnetic field in the vicinity of the magnetic field generation source by arranging the circuit board 61 in the vicinity of the magnetic field generation source and displaying the image on the display panel 60. it can.

  In addition, since the magnetic shield 70 is provided in the display device 3, it is possible to reduce leakage of magnetism generated from the display panel 60 to the mounting surface S5 side. Thereby, a magnetic field can be measured correctly.

  In the display device 3, when the magnetic shield layer 14 is provided, or when a magnetic shield layer is provided in a layer between each magnetic detection element 12 and the wiring, the data transmission unit 13. In addition, leakage of magnetism generated from the wiring to the mounting surface S5 side can be reduced. Thereby, a magnetic field can be measured more accurately.

  In the display device 3, the magnetic detection device 50, the magnetic shield 70, and the display panel 60 are superposed in this order. Thereby, since the observer can arrange the display device 3 at an arbitrary position or point it in an arbitrary direction, the observer can easily arrange the display device 3 at a place where the magnetic field is desired to be observed. Can do.

  DESCRIPTION OF SYMBOLS 1, 2, 3 ... Display apparatus, 10 ... Magnetic detection apparatus, 11 ... Circuit board, 12 ... Magnetic detection element, 13 ... Data transmission part, 13A ... Measurement signal, 14 ... Magnetic shield layer, 20 ... Signal processing part, 20A ... Video signal, 30 ... Projection device, 30A ... Projection light, 40 ... Wearable display, 41 ... Light transmissive substrate, 42 ... Projection device, 42A ... Projection light, 43 ... Frame, 50 ... Magnetic detection device, 51 ... Circuit Substrate, 60 ... display panel, 70 ... magnetic shield, 100 ... user, 110 ... eyeball, C1, C2, C3, C4, C5 ... cable, S1 ... mounting surface, S2 ... projection surface, S3 ... indirect projection surface, S4 ... Projection surface, S5: mounting surface, S6: display surface.

Claims (4)

A circuit board having a mounting surface on the front surface and a projection surface on the back surface;
A plurality of magnetic detection elements mounted on the mounting surface;
An information processing unit that generates a video signal by processing a detection signal of each of the magnetic detection elements;
And a projection device that generates projection light based on the video signal and radiates the generated projection light toward the projection surface. A circuit board having a mounting surface on the surface;
A plurality of magnetic detection elements mounted on the mounting surface;
An information processing unit that generates a video signal by processing a detection signal of each of the magnetic detection elements;
A light transmissive substrate provided between the user's eyeball and the back surface of the circuit board;
A display device comprising: a projection device that projects an image based on the video signal onto a surface of the light-transmitting substrate and a user can visually recognize the back surface of the circuit board. The display device according to claim 2 , wherein the light transmissive substrate has a filter function for attenuating arc light. A circuit board having a mounting surface on the surface;
A plurality of magnetic detection elements mounted on the mounting surface;
An information processing unit that generates a video signal by processing a detection signal of each magnetic detection element, a display panel that is provided at a position facing the back surface of the circuit board, and displays a video based on the video signal;
A display device comprising: a magnetic shield provided between a back surface of the circuit board and the display panel.

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