JP6048288B2 - Light control device, terminal device, light control system, light control method, and light control program - Google Patents

Description

  The disclosed technology relates to a light control device, a terminal device, a light control system, a light control method, and a light control program.

  It is known that blue visible light (for example, visible light having a wavelength range of 380 nm to 495 nm) called so-called blue light activates human sympathetic nerves to make humans excited. In addition, it is known that human beings are prevented from falling asleep because they continue to visually recognize blue visible light for more than a certain time before going to bed. There is widespread recognition that it is preferable not to visually recognize time.

  In view of such circumstances, a technique for reducing the intensity of light emitted from a specific light source after a predetermined time has been proposed. By applying this technology and reducing the intensity of blue visible light emitted from a specific light source after a predetermined time, it is possible to expect the effect of suppressing disturbing sleep due to visual recognition of blue visible light before going to bed.

JP 2006-252944 A

  However, when the intensity of blue visible light emitted from a lighting fixture or a display (for example, a liquid crystal display) is lowered, the hue of the light source of the lighting fixture or the hue of the display may be impaired more than necessary. In order not to impair the hue of the light source of the lighting fixture and the hue of the display more than necessary, it is preferable to measure the intensity of blue visible light with high accuracy. However, newly installing a measuring instrument for measuring blue visible light is time consuming and leads to an increase in cost.

  It is an object of the disclosed technology to realize the adjustment of the intensity of blue visible light to an intensity suitable for the situation with a simple configuration.

  In the disclosed technology, the ultraviolet sensor has sensitivity in the ultraviolet wavelength region and the blue visible light wavelength region adjacent to the ultraviolet wavelength region. An acquisition part acquires the intensity | strength of the blue visible light measured with the ultraviolet sensor in the low intensity | strength time slot when the intensity | strength of the ultraviolet-ray which injects into an ultraviolet sensor becomes less than a reference value. The adjustment unit is a blue visible light emitted from a specific light source that emits a blue visible light incident on the ultraviolet sensor based on a comparison result between the intensity of the blue visible light acquired by the acquisition unit and a threshold value in a low intensity time zone. Adjust the intensity.

  As one aspect, the disclosed technology has an effect that the intensity of blue visible light can be adjusted to an intensity suitable for the situation with a simple configuration.

It is a functional block diagram which shows an example of the principal part function of the light modulation system which concerns on embodiment. It is a graph which shows an example of the breakdown of the measurement object wavelength range of the ultraviolet sensor contained in the smart device which concerns on embodiment. It is a schematic perspective view which shows an example of the external appearance of the smart device which concerns on embodiment. It is a block diagram which shows an example of a structure of the electric system of the smart device which concerns on embodiment. It is a schematic diagram which shows an example of a structure of the sleep related information table used with the smart device which concerns on embodiment. It is a schematic diagram which shows an example of a structure of the threshold value change table used with the smart device which concerns on embodiment. It is a flowchart which shows an example of the flow of the sleep detection process which concerns on embodiment. It is a flowchart which shows an example of the flow of the light control process which concerns on embodiment. It is a flowchart which shows an example of the flow of the threshold value change process which concerns on embodiment. It is a schematic perspective view which shows an example of the external appearance of a smart device in case the measurement surface of the ultraviolet sensor contained in the smart device which concerns on embodiment is upward. It is a schematic perspective view which shows the external appearance of a smart device when the measurement surface of the ultraviolet sensor contained in the smart device which concerns on embodiment is sideways.

  Hereinafter, an example of an embodiment of the disclosed technology will be described in detail with reference to the drawings. In the following description, a smart device is described as an example of a terminal device, but the disclosed technology is not limited to this. The disclosed technology can be applied to various terminal devices such as a personal computer, a game machine, a car navigation device, and a mobile phone.

  As an example, the dimming system 10 illustrated in FIG. 1 includes a smart device 12, a first specific light source 14, and a second specific light source 16. The first specific light source 14 and the second specific light source 16 are light sources that emit light including blue visible light, and are installed in the same room. The 1st specific light source 14 points out LED (light emitting diode) with which the lighting fixture installed in the ceiling is equipped, for example. The second specific light source 16 refers to a backlight of a display (for example, a liquid crystal display) provided in an upright (stationary) or wall-mounted television receiver, for example.

  The smart device 12 includes a light control device 18 and a third specific light source 20. The 3rd specific light source 20 points out the light source which emits light containing blue visible light, for example, points out the backlight of the display (for example, liquid crystal display) with which the smart device 12 was equipped.

  The light control device 18 includes an ultraviolet sensor 22, an acquisition unit 24, an adjustment unit 26, a sleep detection unit 28, a storage unit 30, a change unit 32, and a detection unit 34, and includes a first specific light source 14, a second specific light source 16, and a first specific light source 16. 3 Adjust the intensity of blue visible light emitted from the specific light source 20. Hereinafter, the first specific light source 14, the second specific light source 16, and the third specific light source 20 are referred to as specific light sources when it is not necessary to distinguish between them.

  As an example, as illustrated in FIG. 2, the ultraviolet sensor 22 has an ultraviolet wavelength region and a blue visible light wavelength region adjacent to the ultraviolet wavelength region in the measurement target wavelength region. In the example shown in FIG. 2, a wavelength range of 280 nm to less than 380 nm is illustrated as the ultraviolet wavelength range, and a wavelength range of 380 nm to 495 nm is illustrated as the blue visible light wavelength range.

  The acquisition unit 24 causes the ultraviolet sensor 22 to measure the intensity of blue visible light incident from the outside during a low intensity time period in which the intensity of the ultraviolet ray measured by the ultraviolet sensor 22 is less than a reference value. The intensity of blue visible light measured by 22 is acquired.

  The adjustment unit 26 adjusts the intensity of the blue visible light emitted from the specific light source based on the comparison result between the intensity of the blue visible light acquired by the acquisition unit 24 and the threshold value during the low intensity period. Here, the adjustment of the intensity of blue visible light refers to, for example, the intensity of blue visible light emitted from a specific light source when the intensity of blue visible light acquired by the acquisition unit 24 is equal to or greater than a threshold value during a low intensity period. Is reduced below a threshold value.

  The sleep onset detection unit 28 detects the sleep onset of the subject in the low intensity time zone. The sleep of the subject is based on, for example, the loudness of the subject's sleep measured by the microphone mounted on the smart device 12 and the acceleration measured by the acceleration sensor mounted on the smart device 12. Detected.

  The storage unit 30 stores the sleep time when sleep is detected by the sleep detection unit 28 in the low intensity time period in units of days.

  The changing unit 32 changes the threshold based on the comparison result between the sleep time when the sleep detection of the day is detected by the sleep detection unit 28 and the sleep time of the past day stored in the storage unit 30. Here, the sleep time of the past day refers to the sleep time of the previous day, for example.

  The detection unit 34 detects the orientation of the measurement surface of the ultraviolet sensor 22. The adjustment unit 26 adjusts the intensity of the blue visible light emitted from the specific light source existing in the measurement surface facing region determined based on the orientation of the measurement surface detected by the detection unit 34. Here, the measurement surface facing region is, for example, the measurement of the ultraviolet sensor 22 when the measurement surface of the ultraviolet sensor 22 faces upward or the region facing the measurement surface of the ultraviolet sensor 22 or when the measurement surface of the ultraviolet sensor 22 is lateral. Refers to the area facing the surface. In the present embodiment, the first specific light source 14 is present in a region facing the measurement surface of the ultraviolet sensor 22 when the measurement surface of the ultraviolet sensor 22 faces upward. Further, the second specific light source 16 exists in a region facing the measurement surface of the ultraviolet sensor 22 when the measurement surface of the ultraviolet sensor 22 is lateral.

  As an example, as shown in FIG. 3, the smart device 12 includes a housing 40. The housing 40 accommodates a touch panel display 42 and a microphone 44. The touch panel display 42 is exposed from the housing 40, and includes a transmissive touch panel 42A and a display 42B (for example, a liquid crystal display or an organic EL display (Organic Electro-Luminescence Display)). The touch panel 42A is superimposed on the display 42B, detects contact with an indicator (for example, a finger of a user of the smart device 12 or a touch pen), and outputs contact position information indicating the contact position of the indicator on the touch panel 42A. . The display 42B displays various information.

  The microphone 44 is provided at the lower edge of the smart device 12. The microphone 44 detects a sound pressure caused by a sound emitted by a user of the smart device 12 or a sound emitted by a sound source external to the smart device 12, and the detected sound pressure is converted into sound data (not shown) by a signal processing circuit (not shown). For example, digital data indicating sound pressure is converted and output.

  The housing 40 houses the ultraviolet sensor 22. The ultraviolet sensor 22 is provided at a specific position on the peripheral edge of the front surface of the smart device 12, and the measurement surface 22A of the ultraviolet sensor 22 is disposed substantially parallel to the surface of the display 42B. Here, the specific position of the peripheral edge of the front surface of the smart device 12 is, for example, a position where the intensity of blue visible light emitted from the display 42B can be measured (for example, a position close to the display 42B (for example, from the edge of the display 42B). 1 to 3 mm apart))).

  As an example, as shown in FIG. 4, the smart device 12 includes a computer 50 and various input / output devices. The acquisition unit 24, the adjustment unit 26, the sleep detection unit 28, the change unit 32, and the detection unit 34 can be realized by, for example, the computer 50 and various input / output devices.

  The computer 50 includes a CPU (Central Processing Unit) 52, a volatile memory 54 (for example, a RAM (Random Access Memory)), and a nonvolatile storage unit 56 (for example, an HDD (Hard Disk Drive) or a flash memory). . The CPU 52, the memory 54, and the storage unit 56 are connected to each other via a bus 58.

  The storage unit 56 stores a dimming program 60. The CPU 52 reads the dimming program 60 from the storage unit 56 and develops it in the memory 54, and sequentially executes the processes included in the dimming program 60. The dimming program 60 includes an acquisition process 60A, an adjustment process 60B, a change process 60D, and a detection process 60E.

  The CPU 52 operates as the acquisition unit 24 illustrated in FIG. 1 by executing the acquisition process 60A. Further, the CPU 52 operates as the adjustment unit 26 illustrated in FIG. 1 by executing the adjustment process 60B. Further, the CPU 52 operates as the changing unit 32 illustrated in FIG. 1 by executing the changing process 60D. Furthermore, the CPU 52 operates as the detection unit 34 illustrated in FIG. 1 by executing the detection process 60E.

  The storage unit 56 stores a sleep detection program 61. The CPU 52 reads out the sleep detection program 61 from the storage unit 56 and develops it in the memory 54, and executes a process included in the sleep detection program 61. The sleep detection program 61 has a sleep detection process 61A. The CPU 52 operates as the sleep detection unit 28 illustrated in FIG. 1 by executing the sleep detection process 61A.

  Here, the case where the dimming program 60 and the sleep detection program 61 (hereinafter referred to as “program” when it is not necessary to distinguish between them) is read from the storage unit 56 is illustrated, but the storage unit 56 is not necessarily from the beginning. There is no need to remember. For example, a program is first stored in an arbitrary “portable storage medium” such as an SSD (Solid State Drive), a DVD disk, an IC card, a magneto-optical disk, or a CD-ROM that is connected to the computer 50. It may be left. The computer 50 may acquire and execute a program from these portable storage media. The program may be stored in a storage unit such as another computer connected to the computer 50 via a communication line or a server device. In this case, the computer 50 acquires a program from another computer or a server device and executes it.

  The storage unit 56 stores a sleep related information table 62 and a threshold change table 64. As an example, as illustrated in FIG. 5, the sleep onset related information table 62 stores sleep onset detection time and threshold change mode information. Here, the sleep onset detection time refers to the sleep onset time at which sleep onset was detected by the sleep onset detection unit 28, and in the example illustrated in FIG. 5, the sleep onset detection time is 22:30 (the past day according to the disclosed technology). An example of sleep time) is illustrated. The threshold change mode information indicates information indicating a threshold change mode by the changing unit 32. The change mode of the threshold indicates any one of “increased the threshold”, “lowered the threshold”, or “not changed the threshold”. In the example illustrated in FIG. 5, “threshold is raised” is illustrated as the threshold change mode.

  As an example, as illustrated in FIG. 6, the threshold change table 64 stores threshold change instruction information for each sleep time change mode information and for each threshold change mode information. Here, the sleep time change mode information is information indicating the change mode of the sleep time. The change in the sleep time is that the latest sleep time when the sleep detection is detected by the sleep detection unit 28 is “late”, “not changed”, or the sleep time stored in the sleep related information table 62, or , "I'm faster". The threshold change instruction information is information indicating a threshold change instruction. The threshold value change instruction indicates any one of “increase threshold value”, “decrease threshold value”, or “do not change threshold value”.

  In the example shown in FIG. 6, “lower the threshold” is associated with “the threshold is raised” and “the sleep time is late”. Further, “the threshold is not changed” is associated with “the threshold is raised” and “the sleep time does not change”. Further, “the threshold is not changed” is associated with “the threshold is raised” and “the sleep time is earlier”.

  In the example shown in FIG. 6, “the threshold value is not changed” and “the sleep time is late” are associated with “lower the threshold value”. Further, “the threshold is not changed” is associated with “the threshold is not changed” and “the sleep time is not changed”. Furthermore, “the threshold value is increased” is associated with “the threshold value has not been changed” and “the sleep time has become earlier”.

  In the example shown in FIG. 6, “the threshold is not changed” is associated with “the threshold is lowered” and “the sleep time is late”. Further, “not changing the threshold” is associated with “the threshold is lowered” and “the sleep time does not change”. Furthermore, “increase threshold” is associated with “lower threshold” and “sleeping time is earlier”.

  Referring back to FIG. 4, the smart device 12 is an input / output / output device that electrically connects the computer 50 and various input / output devices to control transmission / reception of various information between the computer 50 and various input / output devices. An interface (I / O) 70 is provided. The smart device 12 includes an ultraviolet sensor 22 and a microphone 44 as an input / output device that is electrically connected to the computer 50 via the bus 58 by being connected to the I / O 70. As input / output devices, a reception unit 72, a display unit 74, a real-time clock (hereinafter referred to as “RTC”) 76, a remote controller (hereinafter referred to as “RC”) 80, an acceleration sensor 82, and an external interface (I / F). 84.

  The receiving unit 72 includes a touch panel 42A, keys (hardware keys) provided outside the touch panel, and the like, and receives instructions from the user of the smart device 12. The display unit 74 includes a display 42B and a display control unit 86. The display 42B includes a backlight 42B1 (for example, an LED) that emits light including blue visible light as an example of the third specific light source 20 illustrated in FIG. The backlight 42B1 illuminates the display area (for example, liquid crystal) of the display 42B from the back side. The display control unit 86 controls the display 42B in response to an instruction from the computer 50.

  The RTC 76 is an integrated circuit dedicated to timekeeping that keeps the current time while the main power of the computer 50 is turned off, and outputs the current time to the computer 50 in response to a request from the computer 50.

  In response to an instruction from the computer 50, the RC 80 transmits a radio signal (for example, an infrared signal) for remote operation to the lighting fixture 88 and the television receiver 90 to control the lighting fixture 88 and the television receiver 90.

  The lighting fixture 88 is installed on the ceiling of the room and illuminates the room from the ceiling side. The luminaire 88 includes an LED 88A that is an example of the first specific light source 14, receives a radio signal transmitted by the RC 80, and controls light emission of the LED 88A according to the received radio signal.

  The television receiver 90 is installed on the floor surface of the room and includes a display (here, a liquid crystal display as an example) 92 that stands in a substantially vertical direction. The display 92 has a backlight 92A, and the backlight 92A illuminates the display area (for example, liquid crystal) of the display 92 from the back side. The display 92 receives the radio signal transmitted by the RC 80, and controls the light emission of the backlight 92A according to the received radio signal.

  The acceleration sensor 82 measures the acceleration of the three axes of the smart device 12 (for example, the X axis, the Y axis, and the Z axis that define a three-dimensional space in the smart device 12). Then, in response to a request from the computer 50, acceleration information indicating the measured acceleration is output to the computer 50. Therefore, the computer 50 can detect a change in the movement of the smart device 12 and the inclination of the smart device based on the acceleration information input from the acceleration sensor 82.

  The external I / F 84 is connected to an external device (for example, a personal computer or a USB memory), and controls transmission / reception of various information between the external device and the computer 50.

  Next, as an operation of the present embodiment, sleep detection processing performed by the smart device 12 when the CPU 52 executes the sleep detection program 61 will be described with reference to FIG.

  As an example, in the sleep detection process illustrated in FIG. 7, first, in step 100, the sleep detection unit 28 determines whether or not the sleep detection start condition is satisfied. The sleep onset detection start condition refers to, for example, a condition that the mode has shifted from the ultraviolet measurement mode to the blue visible light measurement mode. Here, both the ultraviolet measurement mode and the blue visible light measurement mode refer to the operation mode of the smart device 12, and the smart device 12 operates in the ultraviolet measurement mode or the blue visible light measurement mode. The ultraviolet measurement mode is an operation mode in which the ultraviolet sensor 22 measures the intensity of ultraviolet light, and the blue visible light measurement mode is an operation mode in which the ultraviolet sensor 22 measures the intensity of blue visible light. For example, as shown in Table 1, the smart device 12 operates in the ultraviolet measurement mode from 4 o'clock to 19:59 and operates from 20 o'clock to 3:59 (in accordance with the disclosed technology). An example of the low intensity time zone) operates in the blue visible light measurement mode. Note that the time zone from 4 o'clock to 19:59 and the time zone from 20:00 to 3:59 shown in Display 1 are examples, and these time zones can be changed as appropriate.

ステップ１００において、入眠検知開始条件を満足していない場合は、判定が否定されてステップ１００の判定が再び行われる。ステップ１００において、入眠検知開始条件を満足した場合は、判定が肯定されて、入眠検知処理はステップ１０２へ移行する。

In step 100, if the sleep onset detection start condition is not satisfied, the determination is denied and the determination in step 100 is performed again. If the sleep onset detection start condition is satisfied in step 100, the determination is affirmed, and the sleep onset detection process proceeds to step 102.

  In step 102, the sleep detection unit 28 acquires acceleration information from the acceleration sensor 82, and the sleep detection process proceeds to step 104. The acceleration information acquired in step 102 is acceleration information indicating acceleration other than gravitational acceleration on each of the X axis, the Y axis, and the Z axis in the smart device 12.

  In step 104, whether or not the acceleration (acceleration of each axis of the X axis, Y axis, and Z axis as an example here) indicated by the acceleration information acquired in step 102 by the sleep detection unit 28 is equal to or less than a first predetermined value. Is determined. Although “0” is adopted as the first predetermined value, the present invention is not limited to this. For example, it may be a general acceleration measured by the acceleration sensor 82 when a human is walking, or set by the user. It may be a value.

  In step 104, when the acceleration indicated by the acceleration information acquired in step 102 exceeds the first predetermined value (when the smart device 12 is moving), the determination is denied and the sleep detection process is performed in step 105. Migrate to In step 104, when the acceleration indicated by the acceleration information acquired in step 102 is equal to or less than the first predetermined value, the determination is affirmed, and the sleep detection process proceeds to step 106.

  In step 105, the sleep detection unit 28 determines whether the sleep detection end condition is satisfied. The sleep detection end condition refers to, for example, a condition that the mode has shifted from the blue visible light measurement mode to the ultraviolet measurement mode. If the sleep detection end condition is not satisfied at step 105, the determination is negative and the routine proceeds to step 102. In step 105, if the sleep detection end condition is satisfied, the determination is affirmed and the sleep detection process ends.

  In step 106, sound data is acquired from the microphone 44 by the sleep detection unit 28, and the sleep detection process proceeds to step 108.

  In step 108, the sleep detection unit 28 determines whether or not the sound pressure indicated by the sound data acquired in step 106 is equal to or less than a second predetermined value. The second predetermined value refers to, for example, a general sound pressure generated by human sleep. In step 108, when the sound pressure indicated by the sound data acquired in step 106 exceeds the second predetermined value, the determination is negative and the sleep detection process proceeds to step 105. In step 108, when the sound pressure indicated by the sound data acquired in step 106 is equal to or smaller than the second predetermined value, the determination is affirmed and the sleep detection process proceeds to step 110.

  In step 110, the sleep detection unit 28 determines whether or not a predetermined time (for example, 1 minute) has elapsed since the processing of step 106 was performed. In step 110, if the predetermined time has not elapsed since the processing of step 106 is performed, the determination is negative and the sleep detection processing shifts to step 106. In step 110, when a predetermined time has elapsed since the processing in step 106 was performed, the determination is affirmed, and the sleep detection processing shifts to step 112.

  In step 112, the current time (an example of today's sleep time according to the disclosed technology) is acquired from the RTC 76 by the sleep detection unit 28, and then the sleep detection process proceeds to step 114.

  In step 114, the sleep detection unit 28 determines whether the sleep detection end condition is satisfied. If the sleep detection end condition is not satisfied at step 114, the determination is negative and the determination at step 114 is performed again. If the sleep detection end condition is satisfied in step 114, the determination is affirmed and the sleep detection process proceeds to step 116.

  In step 116, the current time acquired in step 112 is stored (overwritten) as the sleep detection time in the sleep sleep related information table 62 by the sleep detection unit 28, and the sleep detection process ends.

  Next, the dimming process performed by the smart device 12 when the CPU 52 executes the dimming program 60 when the dimming process start condition is satisfied will be described with reference to FIG. The dimming process start condition includes, for example, a condition that a dimming process start instruction has been received by the touch panel display 42 and a condition that the dimming process has been completed (the process in step 230 described below has been completed). Etc.

  In the dimming process shown in FIG. 8 as an example, first, in step 200, the acquisition unit 24 acquires the current time from the RTC 76, and determines whether or not the acquired current time is included in the low intensity time zone. The Here, as an example of the low-intensity time zone, the time zone from 20:00 to 3:59 shown in Table 1 is adopted. In step 200, when the current time is not included in the low intensity time zone (for example, in the time zone from 4 o'clock to 19:59), the determination is denied and the dimming process proceeds to step 202. . In step 200, if the current time is included in the low intensity time zone, the determination is affirmed, and the dimming process proceeds to step 204.

  In step 202, the acquisition unit 24 determines whether or not the current operation mode of the smart device 12 is the blue visible light measurement mode. In step 202, when the current operation mode of the smart device 12 is not the blue visible light measurement mode (when the current operation mode of the smart device 12 is the ultraviolet measurement mode), the determination is negative and the dimming process is performed in step 200. Migrate to In step 202, when the current operation mode of the smart device 12 is the blue visible light measurement mode, the determination is affirmed and the dimming process proceeds to step 206.

  In step 206, the acquisition unit 24 shifts from the blue visible light measurement mode to the ultraviolet measurement mode, and the dimming process shifts to step 200.

  In step 204, the acquisition unit 24 determines whether or not the current operation mode of the smart device 12 is the ultraviolet ray measurement mode. In step 204, if the current operation mode of the smart device 12 is the ultraviolet ray measurement mode, the determination is affirmed, and the dimming process proceeds to step 208. In step 204, if the current operation mode of the smart device 12 is not the ultraviolet measurement mode (if the current operation mode of the smart device 12 is the blue visible light measurement mode), the determination is negative, and the dimming process is performed in step 210. Migrate to

  In step 208, the acquisition unit 24 shifts from the ultraviolet measurement mode to the blue visible light measurement mode, and the dimming process proceeds to step 210.

  In step 210, the acquisition unit 24 causes the ultraviolet sensor 22 to measure the intensity of blue visible light, the intensity of blue visible light measured by the ultraviolet sensor 22 is acquired, and the dimming process proceeds to step 212.

  In step 212, the acquisition unit 24 determines whether or not the intensity of the blue visible light acquired in step 210 is greater than or equal to a threshold value. In step 212, when the intensity | strength of the blue visible light acquired by step 210 is less than a threshold value, determination is denied and a light control process transfers to step 200. In step 212, when the intensity | strength of the blue visible light acquired by step 210 is more than a threshold value, determination is affirmed and a light control process transfers to step 214. FIG.

  In step 214, acceleration information is acquired from the acceleration sensor 82 by the detection unit 34, and the dimming process proceeds to step 216. Note that the acceleration information acquired in step 214 is acceleration information indicating the gravitational acceleration of each of the X axis, the Y axis, and the Z axis in the smart device 12.

  In step 216, the detection unit 34 determines whether or not the measurement surface 22 </ b> A of the ultraviolet sensor 22 is upward based on the acceleration information acquired in step 214. Here, upward refers to, for example, a direction including upward in the vertical direction shown in FIG. 10 (for example, a direction within a range of ± 45 ° when the vertical direction is 0 ° and the center of the measurement surface 22A is the origin). Point to. In step 216, if the measurement surface 22A of the ultraviolet sensor 22 is not upward, the determination is negative, and the dimming process proceeds to step 218. In step 216, if the measurement surface 22A of the ultraviolet sensor 22 faces upward, the determination is affirmed and the dimming process proceeds to step 220.

  In step 218, the detection unit 34 determines whether or not the measurement surface 22 </ b> A of the ultraviolet sensor 22 is sideways based on the acceleration information acquired in step 214. Here, as shown in FIG. 11 as an example, the horizontal orientation is a direction including the orientation of the measurement surface 22A in a state where the smart device 12 is erected in the vertical direction (for example, the horizontal direction is 0 ° and the measurement surface 22A is (Direction within a range of ± 45 ° with the center as the origin). In step 218, if the measurement surface 22 </ b> A of the ultraviolet sensor 22 is sideways, the determination is affirmed and the dimming process proceeds to step 222. In step 218, if the measurement surface 22 </ b> A of the ultraviolet sensor 22 is not sideways, the determination is negative and the dimming process proceeds to step 224.

  In step 220, the adjustment unit 26 reduces the intensity of the blue visible light emitted from the lighting device 88 and the display 42B of the touch panel display 42 so that the intensity of the blue visible light measured by the ultraviolet sensor 22 is less than the threshold value. Let In addition, the fall of the intensity | strength of the blue visible light emitted from the lighting fixture 88 is implement | achieved when the adjustment part 26 instruct | indicates the fall of the intensity | strength of blue visible light with respect to the lighting fixture 88 by radio | wireless communication via RC80. The decrease in the intensity of the blue visible light emitted from the display 42B of the touch panel display 42 is realized by the adjustment unit 26 controlling the backlight 42B1 via the display control unit 86. In the present embodiment, as the amount of decrease in the intensity of the blue visible light that is decreased by the adjustment unit 26, for example, the threshold and the intensity of the blue visible light measured by the ultraviolet sensor 22 (for example, the blue visible light acquired in step 210). The amount of decrease determined according to the strength of the

  In step 222, the adjustment unit 26 reduces the intensity of the blue visible light emitted from the display 42B and the display 92 of the television receiver 90 so that the intensity of the blue visible light measured by the ultraviolet sensor 22 is less than the threshold. . The reduction in the intensity of the blue visible light emitted from the display 92 of the television receiver 90 is caused by the adjustment unit 26 instructing the television receiver 90 to reduce the intensity of the blue visible light by wireless communication via the RC 80. It is realized with.

  In Step 224, the adjustment unit 26 reduces the intensity of the blue visible light emitted from the display 42B of the touch panel display 42 so that the intensity of the blue visible light measured by the ultraviolet sensor 22 is less than the threshold value.

  In the next step 226, the sleep detection unit 28 determines whether or not the subject's sleep is detected. Here, the detection of the subject's falling asleep means, for example, that the determination is affirmed in step 110 (or that the sleeping time is acquired in step 112). If it is determined in step 226 that the subject's sleep is not detected, the determination is denied and the process proceeds to step 228. If it is detected in step 226 that the subject has fallen asleep, the determination is affirmed and the process proceeds to step 330.

  In step 228, the changing unit 32 acquires the current time from the RTC 76 by the acquiring unit 24, and determines whether or not the acquired current time is included in the low intensity time zone. If it is determined in step 228 that the current time is not included in the low intensity time zone, the determination is negative and the dimming process proceeds to step 206. In step 228, when the current time is included in the low intensity time zone, the determination is affirmed and the dimming process proceeds to step 226.

  In step 230, the threshold value changing process shown in FIG. 9 is performed by the changing unit 32 as an example, and then the dimming process ends.

  In the threshold value changing process shown in FIG. 9, first, in step 232A, the changing unit 32 determines whether or not the threshold value has been raised the previous day based on the sleep related information table 62. That is, the change unit 32 determines that the threshold value has been raised to the previous day if the threshold change mode indicated by the threshold value change mode information stored in the sleep onset related information table 62 is “increased threshold”. The changing unit 32 determines that the threshold has not been raised the previous day unless the change mode of the threshold is other than “the threshold has been raised”.

  In step 232A, when the threshold value is raised on the previous day, the determination is affirmed, and the threshold value changing process proceeds to step 232B. In step 232A, if the threshold value has not been raised on the previous day, the determination is negative and the threshold value changing process proceeds to step 232E.

  In step 232B, the change unit 32 acquires the sleep onset time of the previous day by acquiring the sleep onset detection time from the sleep onset related information table 62, and then the threshold value changing process proceeds to step 232C.

  In step 232C, the changing unit 32 determines whether or not the sleep time acquired in step 112 in the sleep detection process is later than the sleep detection time acquired in step 232B. In step 232C, when the sleep onset time acquired in step 112 in the sleep onset detection process is not later than the sleep onset detection time acquired in step 232B, the determination is denied and the threshold value changing process ends. In step 232C, if the sleep onset time acquired in step 112 in the sleep onset detection process is later than the sleep onset detection time acquired in step 232B, the determination is affirmed and the threshold value changing process proceeds to step 232D.

  In step 232D, the threshold value is lowered by the changing unit 32 according to the threshold value changing table 64, and then the threshold value changing process is ended. In step 232D, the threshold reduction amount may be a default reduction amount or may be a reduction amount specified in advance by the user.

  In step 232E, the changing unit 32 determines whether or not the threshold value has been lowered the previous day based on the sleep related information table 62. In other words, the change unit 32 determines that the threshold has been lowered the previous day if the change mode of the threshold indicated by the threshold change mode information stored in the sleep-related information table 62 is “lower threshold”. Moreover, the change part 32 will determine with the threshold value not having been changed on the previous day if the change aspect of a threshold value is other than "it lowered the threshold value".

  In step 232E, when the threshold value is lowered on the previous day, the determination is affirmed, and the threshold value changing process proceeds to step 232F. In step 232E, if the threshold value has not been lowered on the previous day (the threshold value has not been changed on the previous day), the determination is negative, and the threshold value changing process proceeds to step 232I.

  In Step 232F, the change unit 32 acquires the sleep onset time of the previous day by acquiring the sleep onset detection time from the sleep onset related information table 62, and then the threshold value changing process proceeds to Step 232G.

  In step 232G, the changing unit 32 determines whether the sleep time acquired in step 112 in the sleep detection process is earlier than the sleep detection time acquired in step 232F. In step 232G, when the sleep onset time acquired in step 112 in the sleep onset detection process is not earlier than the sleep onset detection time acquired in step 232F, the determination is denied and the threshold value changing process ends. In step 232G, if the sleep onset time acquired in step 112 of the sleep onset detection process is earlier than the sleep onset detection time acquired in step 232F, the determination is affirmed and the threshold value changing process proceeds to step 232H.

  In step 232H, the changing unit 32 increases the threshold value according to the threshold value changing table 64, and then the threshold value changing process ends. In step 232H, the threshold increase amount may be a default increase amount or may be an increase amount specified in advance by the user.

  In step 232I, the change unit 32 acquires the sleep onset time from the sleep onset related information table 62, thereby acquiring the sleep on the previous day, and then the threshold value changing process proceeds to step 232J.

  In step 232J, the changing unit 32 determines whether the sleep time acquired in step 112 in the sleep detection process is earlier than the sleep detection time acquired in step 232I. In step 232J, if the sleep onset time acquired in step 112 in the sleep onset detection process is not earlier than the sleep onset detection time acquired in step 232I, the determination is negative and the threshold value changing process proceeds to step 232L. In step 232J, if the sleep onset time acquired in step 112 of the sleep onset detection process is earlier than the sleep onset detection time acquired in step 232I, the determination is affirmed and the threshold value changing process proceeds to step 232K.

  In step 232K, the threshold value is raised according to the threshold value changing table 64 by the changing unit 32, and then the threshold value changing process is terminated. In step 232K, the threshold increase amount may be a default increase amount, or may be an increase amount specified in advance by the user.

  In step 232L, the changing unit 32 determines whether the sleep time acquired in step 112 in the sleep detection process is later than the sleep detection time acquired in step 232I. In step 232L, if the sleep onset time acquired in step 112 in the sleep onset detection process is not later than the sleep onset detection time acquired in step 232I, the determination is denied and the threshold value changing process ends. In step 232L, if the sleep onset time acquired in step 112 in the sleep onset detection process is later than the sleep onset detection time acquired in step 232I, the determination is affirmed and the threshold value changing process proceeds to step 232M.

  In step 232M, the changing unit 32 lowers the threshold according to the threshold changing table 64, and the threshold changing process ends. In step 232M, the threshold reduction amount may be a default reduction amount or a reduction amount designated in advance by the user.

  As described above, in the dimming system 10, the acquisition unit 24 uses the fact that the measurement target wavelength range of the ultraviolet sensor 22 includes the blue visible light wavelength range, and thus the time when the intensity of the ultraviolet light is less than the reference value. The band causes the ultraviolet sensor 22 to measure the intensity of blue visible light. Therefore, it is not necessary to separately prepare a dedicated measuring instrument for measuring the intensity of blue visible light. Further, the intensity of the blue visible light measured by the ultraviolet sensor 22 is acquired by the acquisition unit 24, and the blue light based on the comparison result between the intensity of the blue visible light acquired by the acquisition unit 24 and the threshold is adjusted by the adjustment unit 26. The intensity of visible light is adjusted. Therefore, compared with the case where the intensity | strength of blue visible light is adjusted without comparing the intensity | strength of blue visible light and a threshold value, the intensity | strength of blue visible light can be adjusted to the intensity | strength suitable for the condition. Therefore, the light control system 10 can implement | achieve the intensity | strength of blue visible light to the intensity | strength suitable for a condition with a simple structure. The intensity suitable for the situation is, for example, the intensity of blue visible light considering the user's lifestyle (for example, the remaining time until bedtime) in the time zone from 20:00 to 3:59 in Table 1 above. (For example, strength that does not hinder the user's quick sleep).

  In the light control system 10, the intensity of the blue visible light is adjusted when the intensity of the blue visible light acquired by the acquisition unit 24 is greater than or equal to the threshold value in the time zone when the intensity of the ultraviolet light is less than the reference value. Is reduced below the threshold. Therefore, the light control system 10 can suppress that a sleep fall is obstructed by visually recognizing blue visible light.

  In the light control system 10, the threshold value is set based on the comparison result between the sleep time when the sleep detection unit 28 detects the sleep of today and the sleep detection time stored in the sleep related information table 62. Be changed. Therefore, the light control system 10 can adjust the intensity | strength of blue visible light to the intensity | strength suitable for the user's daily sleep time when a sleep is detected.

  Moreover, in the light control system 10, when the threshold value is changed on the previous day by the changing unit 32, the threshold value is changed based on the change amount of the previous day threshold value and the comparison result between the sleep time of today and the sleep time of the previous day. Is changed. Therefore, the light control system 10 can suppress the deterioration of the hue of the specific light source and the disturbing sleep due to the adjustment of the intensity of the blue visible light of the previous day.

  In the light control system 10, the threshold value is raised by the changing unit 32 when the previous day's sleep time is later than the previous day's sleep time. Therefore, the dimming system 10 can suppress the disturbing sleep due to the increase in the intensity of blue visible light on the previous day.

  In the dimming system 10, the threshold value is raised by the changing unit 32 when the previous day's sleep time is earlier than the previous day's sleep time. Therefore, the light control system 10 can suppress that the hue of the specific light source deteriorates due to the decrease in the intensity of the blue visible light on the previous day.

  In the light control system 10, the threshold value is lowered when the change unit 32 does not change the threshold value on the previous day and the current sleep time is later than the previous sleep time. Therefore, the light control system 10 can further suppress that the sleep is disturbed by visually recognizing the blue visible light.

  In the light control system 10, the threshold value is raised when the change unit 32 does not change the threshold value on the previous day and the sleep time of today is earlier than the sleep time of the previous day. Therefore, the light control system 10 can ensure the hue of the specific light source.

  In the dimming system 10, the adjustment unit 26 adjusts the intensity of the blue visible light emitted from the LED 88A when the measurement surface 22A is upward, and the blue visible light emitted from the backlight 92A when the measurement surface 22A is horizontal. The light intensity is adjusted. Therefore, the light control system 10 can easily adjust the intensity of the blue visible light measured by the ultraviolet sensor 22.

  In the above-described embodiment, the sleep time of the previous day is illustrated as an example of the sleep time of the past day according to the disclosed technique, but the disclosed technique is not limited to this, and the sleep time of several days ago and the past An average sleep time of several days may be used.

  In the above-described embodiment, “the threshold is raised” and “the sleep time is earlier” in the threshold change table 64 are associated with “do not change the threshold”. It is not limited. For example, “increase threshold” may be associated with “increased threshold” and “sleeping time has become earlier” in the threshold change table 64.

  In the above-described embodiment, “the threshold is lowered” and “the sleep time is late” in the threshold change table 64 are associated with “do not change the threshold”. It is not limited. For example, “lower threshold” may be associated with “lower threshold” and “sleeping time is late” in the threshold change table 64.

  All documents, patent applications and technical standards mentioned in this specification are to the same extent as if each individual document, patent application and technical standard were specifically and individually stated to be incorporated by reference. Incorporated by reference in the book.

  Regarding the above embodiment, the following additional notes are disclosed.

(Appendix 1)
The ultraviolet sensor having sensitivity in the ultraviolet wavelength region and the blue visible light wavelength region adjacent to the ultraviolet wavelength region, and in the low intensity time zone in which the intensity of the ultraviolet light incident on the ultraviolet sensor is less than a reference value, Based on the comparison result between the intensity of the blue visible light acquired by the acquisition unit and the threshold value in the low intensity time zone, the acquisition unit that acquires the intensity of the measured blue visible light is incident on the ultraviolet sensor. And an adjusting unit that adjusts the intensity of the blue visible light emitted from the specific light source that emits the blue visible light.

(Appendix 2)
The adjustment unit reduces the intensity of the blue visible light emitted from the specific light source to be less than the threshold when the intensity of the blue visible light acquired by the acquisition unit is equal to or greater than the threshold during the low intensity period. The dimming device according to Supplementary Note 1, wherein:

(Appendix 3)
A sleep detection unit that detects the sleep of the subject in the low intensity time zone, a storage unit that stores the sleep time when the sleep detection is detected by the sleep detection unit in the low intensity time zone, and the sleep detection The change part which changes the said threshold value based on the comparison result of the sleep time of the day when the sleep of today was detected by the part and the sleep time of the past day memorize | stored in the said memory | storage part, The addition part of Claim 2 further including Dimming device.

(Appendix 4)
When the threshold value is changed on a specific date in the past, the change unit changes the threshold value on the specific date in the past, and the sleep time when the sleep is detected today by the sleep detection unit and the storage unit The dimming device according to supplementary note 3, wherein the threshold value is changed based on a comparison result with a sleep time of the specific day in the past that is stored in

(Appendix 5)
The changing unit raises the threshold value on the specific date in the past, and the sleep time when the sleep detection of today is detected by the sleep detection unit is based on the sleep time on the specific date in the past stored in the storage unit. The light control device according to appendix 4, which lowers the threshold when the speed is too late.

(Appendix 6)
The changing unit raises the threshold value on the specific date in the past, and the sleep time when the sleep detection of today is detected by the sleep detection unit is based on the sleep time on the specific date in the past stored in the storage unit. The dimming device according to Supplementary Note 4 or Supplementary 5, wherein the threshold value is not changed when the threshold is early.

(Appendix 7)
The changing unit raises the threshold value on the specific date in the past, and the sleep time when the sleep detection of today is detected by the sleep detection unit is based on the sleep time on the specific date in the past stored in the storage unit. The light control device according to Supplementary Note 4 or Supplementary Note 5, wherein the threshold value is increased when the threshold is too early.

(Appendix 8)
The change unit lowers the threshold value on the specific date in the past, and the sleep time when the sleep detection of the day is detected by the sleep detection unit from the sleep time on the specific date in the past stored in the storage unit. The dimming device according to any one of appendix 4 to appendix 7, which raises the threshold value when the threshold is too early.

(Appendix 9)
The change unit lowers the threshold value on the specific date in the past, and the sleep time when the sleep detection of the day is detected by the sleep detection unit from the sleep time on the specific date in the past stored in the storage unit. The light control device according to any one of Supplementary Note 4 to Supplementary Note 8, wherein the threshold value is not changed when the threshold value is late.

(Appendix 10)
The change unit lowers the threshold value on the specific date in the past, and the sleep time when the sleep detection of the day is detected by the sleep detection unit from the sleep time on the specific date in the past stored in the storage unit. The light control device according to any one of Supplementary Note 4 to Supplementary Note 8, which lowers the threshold value when the speed is too late.

(Appendix 11)
The change unit does not change the threshold value on the specific date in the past, and the sleep time on the specific date in the past in which the sleep time when the sleep on the day is detected by the sleep detection unit is stored in the storage unit. The light control device according to any one of Supplementary Note 4 to Supplementary Note 10, which lowers the threshold value when it is slower.

(Appendix 12)
The change unit does not change the threshold value on the specific date in the past, and the sleep time on the specific date in the past in which the sleep time when the sleep on the day is detected by the sleep detection unit is stored in the storage unit. The light control device according to any one of Supplementary Note 4 to Supplementary Note 11, wherein the threshold value is increased when the threshold value is earlier.

(Appendix 13)
The detector further includes a detection unit that detects a direction of the measurement surface of the ultraviolet sensor, and the specific light source is blue visible among light sources existing in a measurement surface facing region determined based on the direction of the measurement surface detected by the detection unit. The light control device according to any one of supplementary notes 1 to 12, which has a predetermined light source that emits light.

(Appendix 14)
The specific light source is a first specific light source installed in a region facing the measurement surface when the measurement surface is upward, and a first light source installed in a region facing the measurement surface when the measurement surface is horizontal. And the adjustment unit detects the upward direction by the detection unit based on a comparison result between the intensity of the blue visible light acquired by the acquisition unit and a threshold value in the low intensity time zone. Supplement 13 for adjusting the intensity of the blue visible light emitted from the first specific light source when adjusted, and adjusting the intensity of the blue visible light emitted from the second specific light source when a horizontal orientation is detected by the detection unit The light control apparatus as described in.

(Appendix 15)
The first specific light source is a light source included in a luminaire installed above the ultraviolet sensor, and the second specific light source is a display provided in a television receiver installed beside the ultraviolet sensor. The light control device according to appendix 14, which is a light source included in the light source.

(Appendix 16)
A terminal device comprising: the light control device according to any one of supplementary notes 1 to 15; and a specific light source that emits blue visible light whose intensity is adjusted by the adjustment unit.

(Appendix 17)
A dimming system comprising: the dimming device according to any one of appendix 1 to appendix 15; and a specific light source that emits blue visible light whose intensity is adjusted by the adjustment unit.

(Appendix 18)
The blue visible light measured by the ultraviolet light sensor in a low intensity time period when the intensity of the ultraviolet light incident on the ultraviolet light sensor having sensitivity in the ultraviolet wavelength region and the blue visible light wavelength region adjacent to the ultraviolet wavelength region is less than a reference value. A blue visible light emitted from a specific light source that emits a blue visible light incident on the ultraviolet sensor based on a comparison result between the obtained blue visible light intensity and a threshold value during the low intensity time period. A dimming method including adjusting the intensity of light.

(Appendix 19)
Measured by the ultraviolet sensor in a low intensity time zone when the intensity of the ultraviolet light incident on the ultraviolet wavelength range that is sensitive to the ultraviolet wavelength range and the blue visible wavelength range adjacent to the ultraviolet wavelength range is less than a reference value. The intensity of the blue visible light is acquired and emitted from the specific light source that emits the blue visible light incident on the ultraviolet sensor based on the comparison result between the acquired intensity of the blue visible light and the threshold value in the low intensity period. A dimming program for executing processing including adjusting the intensity of blue visible light to be generated.

DESCRIPTION OF SYMBOLS 10 Light control system 12 Smart device 14 1st specific light source 16 2nd specific light source 18 Light control apparatus 20 3rd specific light source 22 Ultraviolet sensor 24 Acquisition part 26 Adjustment part 28 Sleeping detection part 30 Storage part 32 Change part 34 Detection part

Claims (14)

An ultraviolet sensor having sensitivity in an ultraviolet wavelength region and a blue visible light wavelength region adjacent to the ultraviolet wavelength region;
An acquisition unit for acquiring the intensity of blue visible light measured by the ultraviolet sensor in a low intensity time zone in which the intensity of the ultraviolet light incident on the ultraviolet sensor is less than a reference value;
The blue visible light emitted from the specific light source emitting blue visible light incident on the ultraviolet sensor based on the comparison result between the intensity of the blue visible light acquired by the acquisition unit and the threshold value in the low intensity time zone. An adjustment unit for adjusting the strength;
Dimming device including   The adjustment unit reduces the intensity of the blue visible light emitted from the specific light source to be less than the threshold when the intensity of the blue visible light acquired by the acquisition unit is equal to or greater than the threshold during the low intensity time period. The light control device according to claim 1. A sleep detection unit that detects the sleep of the subject in the low intensity time zone; and
A storage unit that stores the sleep time when sleep onset is detected by the sleep detection unit in the low intensity time zone;
And a change unit that changes the threshold based on a comparison result between a sleep time when the sleep detection of the day is detected by the sleep detection unit and a sleep time of a past day stored in the storage unit. The light control apparatus of 2.   When the threshold value is changed on a specific date in the past, the change unit changes the threshold value on the specific date in the past, and the sleep time when the sleep is detected today by the sleep detection unit and the storage unit The dimming device according to claim 3, wherein the threshold value is changed based on a comparison result with a sleep time of the past specific date stored in the past.   The changing unit raises the threshold value on the specific date in the past, and the sleep time when the sleep detection of today is detected by the sleep detection unit is based on the sleep time on the specific date in the past stored in the storage unit. The light control device according to claim 4, wherein the threshold value is lowered when the speed is too late.   The change unit lowers the threshold value on the specific date in the past, and the sleep time when the sleep detection of the day is detected by the sleep detection unit from the sleep time on the specific date in the past stored in the storage unit. The light control device according to claim 4, wherein the threshold value is increased when the threshold is too early.   The change unit does not change the threshold value on the specific date in the past, and the sleep time on the specific date in the past in which the sleep time when the sleep on the day is detected by the sleep detection unit is stored in the storage unit. The light control device according to any one of claims 4 to 6, wherein the threshold value is lowered when the time is slower.   The change unit does not change the threshold value on the specific date in the past, and the sleep time on the specific date in the past in which the sleep time when the sleep on the day is detected by the sleep detection unit is stored in the storage unit. The light control device according to any one of claims 4 to 7, wherein the threshold value is increased when the speed is earlier. A detector that detects the orientation of the measurement surface of the ultraviolet sensor;
The said specific light source has a predetermined light source which emits blue visible light among the light sources which exist in the measurement surface opposing area | region determined based on the direction of the said measurement surface detected by the said detection part. The light control apparatus of any one of these. The specific light source is a first specific light source installed in a region facing the measurement surface when the measurement surface is upward, and a first light source installed in a region facing the measurement surface when the measurement surface is horizontal. 2 specific light sources,
The adjustment unit is configured to detect the first specific light source when upward is detected by the detection unit based on a comparison result between the intensity of blue visible light acquired by the acquisition unit and a threshold value during the low intensity time period. 10. The light control device according to claim 9, wherein the intensity of blue visible light emitted from the second specific light source is adjusted when a horizontal orientation is detected by the detection unit. The light control device according to any one of claims 1 to 10,
A specific light source emitting blue visible light whose intensity is adjusted by the adjustment unit;
A terminal device including The light control device according to any one of claims 1 to 10,
A specific light source emitting blue visible light whose intensity is adjusted by the adjustment unit;
Including dimming system. The blue visible light measured by the ultraviolet light sensor in a low intensity time period when the intensity of the ultraviolet light incident on the ultraviolet light sensor having sensitivity in the ultraviolet wavelength region and the blue visible light wavelength region adjacent to the ultraviolet wavelength region is less than a reference value. Get the light intensity,
Adjusting the intensity of blue visible light emitted from a specific light source that emits blue visible light incident on the ultraviolet sensor based on a comparison result between the intensity of blue visible light acquired and a threshold value in the low intensity time period. Dimming method including. On the computer,
The blue visible light measured by the ultraviolet light sensor in a low intensity time period when the intensity of the ultraviolet light incident on the ultraviolet light sensor having sensitivity in the ultraviolet wavelength region and the blue visible light wavelength region adjacent to the ultraviolet wavelength region is less than a reference value. Get the light intensity,
Adjusting the intensity of blue visible light emitted from a specific light source that emits blue visible light incident on the ultraviolet sensor based on a comparison result between the intensity of blue visible light acquired and a threshold value in the low intensity time period. Dimming program for executing processing including

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