JP2023169041A - Illumination system - Google Patents

Abstract

To provide an illumination system capable of improving the efficiency of work while looking at a display screen of electrical equipment.SOLUTION: An illumination system 10 includes a first light source 1A, a second light source 1B, a control unit 3, and an information detection unit 5. The first light source 1A irradiates a beam of first illumination light onto a first irradiation area of an irradiation surface. The second light source 1B irradiates a beam of the second illumination light onto a second irradiation area of the irradiation surface. The irradiation surface is located behind a piece of electrical equipment that has a display screen. The control unit 3 controls the first light source 1A and the second light source 1B. The information detection unit 5 detects biological pieces of information of a user of the electrical equipment. The first irradiation area is narrower than the second irradiation area. At least a part of the first irradiation area overlaps with the second irradiation area. The control unit 3 is configured so as to change the luminous power of the first illumination light in a period of change of the luminous power at a predetermined period based on the biological information of the user as the detection result of the information detection unit 5.SELECTED DRAWING: Figure 1

Description

TECHNICAL FIELD This disclosure relates generally to lighting systems, and more particularly to lighting systems that include multiple light sources.

Patent Document 1 describes an illumination device (illumination system) having a red light emitting means, a blue light emitting means, and a green light emitting means. In the lighting device described in Patent Document 1, for example, wakefulness can be promoted by increasing the light emission ratio of the blue light emitting means while keeping the sum of the light emission amounts of the three light emitting means substantially constant.

JP 2019-102156 Publication

Incidentally, in recent years, there has been an increasing trend in the number of people working while looking at the display screen of electrical equipment, and there is a demand for a work environment (lighting environment) for improving the efficiency of the work.

An object of the present disclosure is to provide a lighting system that can improve the efficiency of work while looking at the display screen of an electrical device.

A lighting system according to one aspect of the present disclosure includes a first light source, a second light source, a control section, and an information detection section. The first light source irradiates a first irradiation area of the irradiation surface with first illumination light. The second light source irradiates a second irradiation area of the irradiation surface with second illumination light. The irradiation surface is located at the rear of an electrical device having a display screen. The control unit controls the first light source and the second light source. The information detection unit detects biometric information of a user of the electrical device. The first irradiation area is narrower than the second irradiation area. At least a portion of the first irradiation area overlaps with the second irradiation area. The control section changes the amount of light of the first illumination light in a light amount change period at a predetermined period based on the biological information of the user, which is a detection result of the information detection section.

According to the lighting system according to one aspect of the present disclosure, it is possible to improve the efficiency of work while looking at the display screen of an electrical device.

FIG. 1 is a configuration diagram of a lighting system according to a first embodiment. FIG. 2 is a schematic diagram of the installation situation of the above lighting system. FIG. 3 is a schematic diagram of an application example of the above lighting system. FIG. 4 is a schematic diagram of an irradiation area formed on an irradiation surface by the above illumination system. FIG. 5 is a chromaticity diagram for explaining the operation of the above lighting system. FIG. 6 is a graph showing the relationship between temporal frequency and amplitude gain regarding the above lighting system. FIG. 7 is a graph showing the temporal change in the luminance when the luminance of the irradiation surface is changed in the first period in the first period with respect to the same illumination system. FIG. 8 is a graph showing a temporal change in the brightness when the brightness of the irradiation surface is changed in the second period in the first period with respect to the same illumination system. FIG. 9 is a graph showing a temporal change in the luminance when the luminance of the irradiation surface is changed in the third period in the first period regarding the same illumination system. FIG. 10A is a graph showing a temporal change in the amount of first illumination light emitted from the first light source of the illumination system according to the second embodiment. FIG. 10B is a graph showing a temporal change in the amount of second illumination light emitted from the second light source of the above illumination system. FIG. 11A is a graph showing a temporal change in the amount of first illumination light emitted from the first light source of the illumination system according to Modification 1 of Embodiment 2. FIG. 11B is a graph showing a temporal change in the amount of second illumination light emitted from the second light source of the above illumination system. FIG. 12A is a graph showing a temporal change in the amount of first illumination light emitted from the first light source of the illumination system according to Modification 2 of Embodiment 2. FIG. 12B is a graph showing a temporal change in the amount of second illumination light emitted from the second light source of the above illumination system.

Hereinafter, lighting systems according to embodiments 1 and 2 will be described with reference to the drawings. Each of the figures described in Embodiments 1 and 2 below is a schematic diagram, and the ratio of the size and thickness of each component does not necessarily reflect the actual size ratio. Furthermore, the configurations described in Embodiments 1 and 2 below are only examples of the present disclosure. The present disclosure is not limited to Embodiments 1 and 2 below, and various changes can be made depending on the design etc. as long as the effects of the present disclosure can be achieved.

(Embodiment 1)
(1) Overview First, an overview of the lighting system 10 according to the first embodiment will be described with reference to FIGS. 1 to 3.

For example, as shown in FIG. 2, the lighting system 10 according to the first embodiment allows a user of the electrical device 6 (hereinafter referred to as "worker 300") to view the display screen 61 of the electrical device 6 (see FIG. 3). It is used to indirectly illuminate the electrical equipment 6 from behind when working in a closed state. The electrical device 6 is, for example, a notebook personal computer. In the illumination system 10 according to the first embodiment, as shown in FIG. 3, the first illumination light 101 from the first light source 1A (see FIG. 1) and By irradiating the second illumination light 102 from the second light source 1B (see FIG. 1), the electrical equipment 6 located in front of the irradiation surface S1 is indirectly illuminated. In the illumination system 10 according to the first embodiment, the irradiation surface S1 is, for example, the surface (front surface) of the partition 200 for forming the work space WS1 (see FIG. 2).

The lighting system 10 according to the first embodiment has a lighting system that makes it easier for the worker 300 to concentrate on the display screen 61 of the electrical device 6 in order to improve the efficiency of work while looking at the display screen 61 of the electrical device 6. The purpose is to create a working environment (lighting environment). For this reason, the lighting system 10 according to the first embodiment employs the following configuration.

The illumination system 10 according to the first embodiment includes a first light source 1A, a second light source 1B, a control section 3, and an information detection section 5. The first light source 1A irradiates the first illumination region R1 of the irradiation surface S1 with the first illumination light 101. The second light source 1B irradiates the second irradiation region R2 of the irradiation surface S1 with second illumination light 102. The irradiation surface S1 is located behind the electrical device 6 having the display screen 61. The control unit 3 controls the first light source 1A and the second light source 1B. The information detection unit 5 detects biometric information of the user (worker 300) of the electrical device 6. The first irradiation area R1 is narrower than the second irradiation area R2. At least a portion of the first irradiation area R1 overlaps with the second irradiation area R2. The control unit 3 changes the light intensity of the first illumination light 101 in a light intensity change period (for example, the first period T1 in FIG. 7) at a predetermined period based on the user's biological information which is the detection result of the information detection unit 5. .

In the illumination system 10 according to the first embodiment, the first illumination light 101 and the second illumination light 102 are irradiated onto the irradiation surface S1 located behind the electric device 6. The first irradiation area R1 that is irradiated with the first illumination light 101 is narrower than the second irradiation area R2 that is irradiated with the second illumination light 102, and overlaps with the second irradiation area R2 at least in part. Then, the control section 3 changes the light amount of the first illumination light 101 during the light amount change period based on the detection result of the information detection section 5 at a predetermined period. This makes it possible to awaken the consciousness of the worker 300 compared to the case where the light intensity of the first illumination light 101 is not changed at a predetermined period. As a result, the worker 300 can easily concentrate on the display screen 61 of the electrical device 6, making it possible to improve the efficiency of work using the electrical device 6.

Furthermore, in the illumination system 10 according to the first embodiment, at least a portion of the first irradiation area R1 overlaps with the second irradiation area R2, compared to a case where the first irradiation area R1 does not overlap with the second irradiation area R2. As a result, the brightness difference gradient becomes gentler, and the discomfort caused to the worker 300 can be alleviated.

(2) Details Next, the configuration of the lighting system 10 according to the first embodiment will be described with reference to FIGS. 1 and 2.

As shown in FIG. 1, the lighting system 10 according to the first embodiment includes a first light source 1A, a second light source 1B, a first drive unit 2A, a second drive unit 2B, a control unit 3, and an input reception unit. 4 and an information detection section 5.

(2.1) First Light Source The first light source 1A includes a first light emitting section 111 and a first optical member 112, as shown in FIG.

The first light emitting unit 111 includes, for example, a plurality of light emitting diodes (hereinafter referred to as "LEDs") of four types (for example, red, green, blue, and white) of different light colors. It is preferable that a plurality of LEDs of the same color are electrically connected in series and mounted on the board. In the following description, a plurality of LEDs of the same color mounted on a board may be referred to as an LED module.

The first optical member 112 is located in front of the first light emitting section 111. The first optical member 112 includes, for example, a diffusion sheet. The diffusion sheet is made of, for example, a transparent synthetic resin such as acrylic resin or polycarbonate resin. Therefore, the light emitted from the first light emitting unit 111 is diffused and mixed by the diffusion sheet, and becomes light (first illumination light 101) of a light color according to the ratio of the light amount of each LED module. That is, the first optical member 112 diffuses the light emitted from the first light emitting section 111 and emits it as the first illumination light 101. Note that the first light source 1A may further include a lens unit. Preferably, the lens unit includes a plurality of lenses that correspond one-to-one to the plurality of LEDs included in each LED module.

Moreover, the first light source 1A further includes a housing 11A, as shown in FIG. The housing 11A is made of metal or synthetic resin. The housing 11A is formed in a box shape with one side (the top side in FIG. 2) open. The first light emitting unit 111 is housed in the housing 11A with the LED facing the opening surface. The first optical member 112 is attached to the housing 11A so as to close the opening surface.

The first light source 1A irradiates the first illumination light 101 onto a first irradiation region R1 (see FIG. 4) of the irradiation surface S1 located behind the electric device 6 having the display screen 61. Note that the first irradiation area R1 will be described later.

(2.2) Second Light Source The second light source 1B includes a second light emitting section 121 and a second optical member 122, as shown in FIG.

Like the first light emitting unit 111, the second light emitting unit 121 includes a plurality of LEDs each having four types of different light colors (for example, red, green, blue, and white). It is preferable that a plurality of LEDs of the same color are electrically connected in series and mounted on the board. In the following description, a plurality of LEDs of the same color mounted on a board may be referred to as an LED module.

The second optical member 122 is located in front of the second light emitting section 121. The second optical member 122 includes, for example, a linear Fresnel lens. The linear Fresnel lens is made of, for example, a transparent synthetic resin such as acrylic resin or polycarbonate resin. Therefore, the light emitted from the second light emitting section 121 is collected and mixed by the linear Fresnel lens, and becomes light (second illumination light 102) of a light color corresponding to the ratio of the light amount of each LED module. That is, the second optical member 122 condenses the light emitted from the second light emitting section 121 and emits it as the second illumination light 102.

Moreover, the second light source 1B further includes a housing 11B, as shown in FIG. The housing 11B is made of metal or synthetic resin. The housing 11B is formed into a box shape with one side (the top side in FIG. 2) open. The second light emitting section 121 is housed in the housing 11B with the LED facing the opening surface. The second optical member 122 is attached to the housing 11B so as to close the opening surface.

The second light source 1B irradiates a second irradiation region R2 (see FIG. 4) of the irradiation surface S1 located behind the electric device 6 having the display screen 61 with the second illumination light 102. Note that the second irradiation area R2 will be described later.

(2.3) First Drive Unit The first drive unit 2A includes, for example, a power conversion circuit that converts AC power supplied from a commercial power system into DC power, and four constant current circuits. The four constant current circuits correspond one-to-one to the four LED modules of the first light emitting section 111.

The power conversion circuit includes, for example, a full-wave rectifier circuit, a boost chopper circuit, a smoothing capacitor, and the like. The full-wave rectifier circuit consists of a diode bridge, for example. The power conversion circuit converts an alternating current voltage (for example, an alternating current voltage with a power supply frequency of 60 Hz and an effective value of 100 V) input from a power system into a direct current voltage higher than the peak voltage of the alternating current voltage.

Each of the four constant current circuits includes, for example, a buck converter. The buck converter is, for example, a step-down chopper circuit. Each constant current circuit operates to step down the DC voltage output from the power conversion circuit using a buck converter, and to match the output current supplied to the corresponding LED module with a target current value. For example, each constant current circuit may receive a digital signal based on a DMX (Digital Multiplex) 512 communication protocol from the control unit 3, and may control the buck converter in accordance with this digital signal. Alternatively, each constant current circuit may perform PWM (Pulse Width Modulation) control on the buck converter according to the light amount target value and light color target value given from the control unit 3.

The first drive unit 2A is electrically connected to the first light source 1A via, for example, four electric cables. The four electric cables electrically connect the output ends of each of the four constant current circuits of the first drive unit 2A and the input ends of each of the four LED modules of the first light source 1A.

(2.4) Second drive unit The second drive unit 2B, like the first drive unit 2A, includes a power conversion circuit that converts AC power supplied from a commercial power system into DC power, and four constant current circuits. and has. The power conversion circuit and four constant current circuits that the second drive unit 2B has have the same circuit configuration as the power conversion circuit and four constant current circuits that the first drive unit 2A has, and the explanation is omitted here. do.

The second drive unit 2B is electrically connected to the second light source 1B via, for example, four electric cables. The four electric cables electrically connect the output ends of each of the four constant current circuits of the second drive unit 2B and the input ends of each of the four LED modules of the second light source 1B.

(2.5) Control Unit The control unit 3 mainly includes a computer system having one or more processors and one or more memories. In the lighting system 10, the functions of the control unit 3 are realized by one or more processors executing programs recorded in a memory. The program may be pre-recorded in a memory, provided through a telecommunications line such as the Internet, or provided recorded on a non-temporary recording medium such as a memory card.

The control unit 3 controls the first light source 1A and the second light source 1B. More specifically, the control unit 3 controls the amount and color of the first illumination light 101 emitted from the first light source 1A, and the amount and color of the second illumination light 102 emitted from the second light source 1B. Control. More specifically, the control section 3 controls the light amount and light color of the first illumination light 101 by providing a first light amount target value and a first light color target value to the first drive section 2A. Further, the control section 3 controls the light amount and light color of the second illumination light 102 by providing the second light amount target value and the second light color target value to the second drive section 2B.

Here, the first illumination light 101 is converted from a first light amount target value and a first light color target value to dimming values of four LED modules, and then converted to target current values of four constant current circuits. Ru. Therefore, the control unit 3 provides the target current value of each constant current circuit to the first drive unit 2A as the first light amount target value and the first light color target value.

Further, the second illumination light 102 is converted from the second light amount target value and the second light color target value to dimming values for the four LED modules, and then converted to target current values for the four constant current circuits. . Therefore, the control unit 3 provides the target current value of each constant current circuit to the second drive unit 2B as the second light amount target value and the second light color target value.

However, when the constant current circuit is subjected to PWM control, the control unit 3 converts the average value per unit time of the output current of the constant current circuit into the duty ratio of PWM control necessary to match each target current value. However, this duty ratio may be given to the first drive section 2A and the second drive section 2B.

(2.6) Input Acceptance Unit The input acceptance unit 4 accepts input specifying the first light amount target value and first light color target value described above. Further, the input receiving unit 4 receives an input specifying the second light amount target value and the second light color target value described above.

The input reception unit 4 is configured by, for example, a computer system. The computer system may be, for example, a desktop or notebook personal computer, or a tablet terminal with an input device such as a touch panel mounted on a plate-shaped housing.

For example, the input reception unit 4 displays a chromaticity diagram (for example, an xy chromaticity diagram of an XYZ color system) on a monitor screen, and selects a chromaticity diagram displayed on the monitor screen with a mouse pointer, a touch pen, or a fingertip. The specified arbitrary chromaticity point is accepted as an input specifying the light color target value. In addition, the input receiving unit 4 displays a GUI (Graphical User Interface) such as a fader or slider on the monitor screen, and inputs an arbitrary value selected by operating the GUI with a mouse pointer, a touch pen, or a fingertip to the light intensity target. Accepts input specifying a value.

The input reception unit 4 is compliant with a communication protocol such as DMX512, and is connected to the control unit 3 via a communication line so as to be able to communicate in both directions. The input receiving unit 4 transmits the received input information (for example, the xy coordinates of the selected chromaticity point, the numerical values of the fader, etc.) to the control unit 3 through the communication line.

(2.7) Information Detection Unit The information detection unit 5 detects biometric information of the user (worker 300) of the electrical device 6 (see FIG. 3). The information detection unit 5 includes, for example, a camera provided separately from the electrical equipment 6. For example, the information detection unit 5 images a predetermined area including the face of the worker 300 with a camera, and outputs the captured image to the control unit 3.

The control unit 3 extracts the feature amount of the worker 300 from the captured image obtained from the information detection unit 5. The feature amount of the worker 300 is, for example, the size of the worker's 300 eyes. Here, the size of the eye of the worker 300 is, for example, the area or number of pixels of a region where the eye of the worker 300 is shown in the captured image. Then, the control unit 3 determines that the worker 300 is sleepy when the size of the eyes of the worker 300 extracted from the captured image is below the reference value, and when it is larger than the reference value. It is determined that the worker 300 is awake. When the control unit 3 determines that the worker 300 is drowsy, it executes a fluctuation operation to be described later. That is, the control unit 3 changes the light intensity of the first illumination light 101 in a light intensity change period (first period T1 to be described later) at a predetermined period based on the user's biological information which is a detection result of the information detection unit 5. . In the first embodiment, the information detection unit 5 detects the face of the worker 300 as the biometric information of the worker 300.

(3) Installation status of lighting system Next, the installation status of the lighting system 10 according to the first embodiment will be described with reference to FIGS. 2 and 3. Below, the direction in which the display screen 61 of the electrical equipment 6 and the irradiation surface S1 are lined up is referred to as the front-rear direction D1, the horizontal direction (in the example of FIG. 3, the longitudinal direction of the display screen 61) is referred to as the left-right direction D2, and the front-rear direction D1 and the left-right direction A direction perpendicular to both directions D2 (in the example of FIG. 3, the lateral direction of the display screen 61) will be described as an up-down direction D3, but these directions are not intended to limit the directions in which the illumination system 10 is used. Further, the arrows indicating "D1", "D2", and "D3" in the drawings are merely shown for explanation, and none of them have any substance. Furthermore, in FIG. 3, in order to easily identify the display screen 61, the first irradiation area R1, and the second irradiation area R2 of the electrical equipment 6, the portions other than the display screen 61, the first irradiation area R1, and the second irradiation area R2 are is colored. That is, the colors shown in FIG. 3 are not actually applied to parts other than the display screen 61, the first irradiation area R1, and the second irradiation area R2. Further, in FIG. 3, the second irradiation area R2 is dot-hatched so that the first irradiation area R1 and the second irradiation area R2 can be easily distinguished. That is, the dot hatching shown in FIG. 3 does not indicate a cross section.

As shown in FIG. 2, the illumination system 10 is installed on an installation stand 7 provided at the lower part of the irradiation surface S1. The irradiation surface S1 is, for example, the surface (front surface) of the partition 200 for forming the work space WS1. A lighting fixture 8 for illuminating the work space WS1 is attached to the ceiling surface of the work space WS1. The lighting fixture 8 is, for example, a ceiling-mounted lighting fixture, but may also be a ceiling-embedded lighting fixture. The lighting fixture 8 irradiates the work space WS1 with third illumination light 103 having a different light color from the first illumination light 101 and the second illumination light 102.

The installation stand 7 has a bottom plate 70, a front plate 71, a rear plate 72, and a pair of side plates 73. The bottom plate 70 has a flat plate shape and is arranged perpendicularly to the irradiation surface S1. Like the bottom plate 70, the front plate 71 has a flat plate shape, and protrudes upward from one end (front end) of the bottom plate 70 in the front-rear direction D1. Like the bottom plate 70, the rear plate 72 has a flat plate shape, and protrudes upward from the other end (rear end) of the bottom plate 70 in the front-rear direction D1. The pair of side plates 73 protrude upward from both ends of the bottom plate 70 in the left-right direction D2 (direction perpendicular to the paper surface of FIG. 2). That is, the installation stand 7 is formed in the shape of a long box with the top of the bottom plate 70 open. In addition, in FIG. 2, illustration of one side plate 73 (this side in FIG. 2) of the pair of side plates 73 is omitted. The bottom plate 70, the front plate 71, the rear plate 72, and the pair of side plates 73 are preferably made of metal, wood, or synthetic resin.

The first light source 1A is installed in an internal space of the installation stand 7 (a space surrounded by a bottom plate 70, a front plate 71, a rear plate 72, and a pair of side plates 73). More specifically, the first light source 1A is fixed to a pair of side plates 73 in the internal space of the installation base 7 so that the opening surface of the housing 11A (the exit surface of the first illumination light 101) faces upward. There is. In addition, the first optical member 112 is displaced (rotated) with respect to the housing 11A so that the first illumination light 101 from the first light source 1A is irradiated toward the irradiation surface S1, and the optical axis is directed toward the irradiation surface S1. It's facing towards S1. That is, the first light source 1A is located between the mounting surface S2 on which the electrical device 6 is placed and the irradiation surface S1 in the front-rear direction D1 where the display screen 61 of the electrical device 6 and the irradiation surface S1 are lined up. (See Figure 2).

The second light source 1B is fixed to a pair of side plates 73 so that the opening surface of the housing 11B (the exit surface of the second illumination light 102) faces upward. Further, the second light source 1B is installed in the internal space of the installation base 7 at a position farther from the irradiation surface S1 than the first light source 1A. That is, in the example of FIG. 2, the first light source 1A and the second light source 1B are lined up in the order of the first light source 1A and the second light source 1B from the rear along the front-rear direction D1.

By the way, in the first light source 1A, the opening surface of the housing 11A (the exit surface of the first illumination light 101) is located below the upper end of the front plate 71 in the vertical direction D3, as shown in FIG. There is. In the second light source 1B, the opening surface of the housing 11B (the exit surface of the second illumination light 102) is located below the upper end of the front plate 71 in the vertical direction D3, as shown in FIG. There is. Therefore, among the first illumination light 101 from the first light source 1A and the second illumination light 102 from the second light source 1B, the light directed toward the front is blocked by the front plate 71 of the installation base 7, and the light is not projected onto the mounting surface S2. It is not directly visible to the worker 300 who is working with the electrical equipment 6 placed there. As a result, it is possible to suppress glare caused by the first illumination light 101 from the first light source 1A and the second illumination light 102 from the second light source 1B. Furthermore, in order to suppress glare and increase the efficiency of incidence on the irradiation surface S1, it is preferable to tilt the output surface 100 of the light source 1 toward the irradiation surface S1.

(4) Irradiation area of irradiation surface Next, the first irradiation area R1 and the second irradiation area R2 formed on the irradiation surface S1 will be explained with reference to FIGS. 3 and 4.

In the illumination system 10 according to the first embodiment, the first illumination light 101 emitted from the first light source 1A is irradiated onto the irradiation surface S1, thereby forming the first irradiation area R1 on the irradiation surface S1. Furthermore, in the illumination system 10 according to the first embodiment, the second illumination light 102 emitted from the second light source 1B is irradiated onto the irradiation surface S1, thereby forming a second irradiation region R2 on the irradiation surface S1. The "first irradiation area R1" in the present disclosure refers to the maximum brightness on the irradiation surface S1 to which the first illumination light 101 is irradiated when only the first light source 1A among the first light source 1A and the second light source 1B is irradiated. This refers to an area where the area is 30% or more. Further, the "second irradiation area R2" as used in the present disclosure refers to the irradiation surface S1 on which the second illumination light 102 is irradiated when only the second light source 1B among the first light source 1A and the second light source 1B is irradiated. This refers to an area where the brightness is 30% or more of the maximum brightness. For example, in the left graph of the two graphs in FIG. 4, the left side of the first threshold Th1 is the range where the brightness is 30% or more of the maximum brightness, and from this graph, the vertical direction D3 of the first irradiation area R1 is The upper limit position and lower limit position are determined. In addition, in the right graph of the two graphs in FIG. 4, the left side of the second threshold Th2 is the range where the brightness is 30% or more of the maximum brightness, and from this graph, the vertical direction D3 of the second irradiation area R2 is The upper limit position and lower limit position are determined. In addition, when the electrical device 6 is placed on the mounting surface S2, when the display screen 61 and the irradiation surface S1 of the electrical device 6 are viewed from the front, a part (lower part) of the display screen 61 of the electrical device 6 is visible. ) overlaps with the first irradiation region R1 (see FIG. 4). Here, in order to provide an appropriate amount of stimulation that does not interfere with visual work as a stimulation that increases the sense of wakefulness, it is preferable that 30% or more of the display screen 61 be included in the first irradiation region R1, for example.

In the example of FIG. 4, the first irradiation area R1 is narrower than the second irradiation area R2. More specifically, the length of the first irradiation area R1 in the left-right direction D2 is equal to the length of the second irradiation area R2 in the left-right direction D2, but the length of the first irradiation area R1 in the vertical direction D3 is equal to the length of the second irradiation area R1 in the left-right direction D2. It is shorter than the length of R2 in the vertical direction D3.

Furthermore, at least a portion of the first irradiation region R1 overlaps with the second irradiation region R2. In the example of FIG. 4, the entire first irradiation area R1 overlaps with the second irradiation area R2. More specifically, the first irradiation area R1 overlaps with the second irradiation area R2 at the lower part of the second irradiation area R2. Therefore, in the illumination system 10 according to the first embodiment, point illumination by the first illumination light 101 is applied to base illumination by the second illumination light 102. As a result, the brightness difference discrimination threshold (the minimum value of the brightness difference between the first illumination light 101 and the second illumination light 102) As a result, it becomes possible to reduce intervening stimulation due to fluctuation motion, which will be described later. That is, according to the lighting system 10 according to the first embodiment, it is possible to alleviate the discomfort of the worker 300 caused by the fluctuation motion (intervention stimulation) described below. In this case, in order to further increase the brightness difference discrimination threshold, in the second irradiation area R2, it is preferable that the brightness at the lower part of the second irradiation area R2 (for example, the portion overlapping with the first irradiation area R1) is highest. Further, in order to enhance the awakening effect due to the fluctuation motion described below, the saturation of the first illumination light 101 is preferably higher than the saturation of the second illumination light 102. Furthermore, it is preferable that the area of the first irradiation region R1 is 1/3 or less of the area of the second irradiation region R2.

Here, as shown in FIG. 3, when the display screen 61 and the irradiation surface S1 of the electrical equipment 6 are viewed from the front, the first illumination light 101 from the first light source 1A forms on the irradiation surface S1. The length L1 of the irradiation area R1 in the left-right direction D2 is preferably at least twice the length L2 of the display screen 61 of the electrical device 6 in the left-right direction D2. As an example, when the length L2 of the display screen 61 of the electrical device 6 in the left-right direction D2 is 265 mm, it is preferable that the length L1 of the first irradiation area R1 in the left-right direction D2 is 693 mm or more. Thereby, the first irradiation region R1 is formed so as to include the stable fixation field of the worker 300 who is working with the electric device 6. The "stable field of fixation" in this disclosure refers to the range in which information can be received without strain, and in addition to the effective field of view in which information can be received by moving the gaze, it is possible to receive information without strain by moving the head. (hereinafter referred to as the "information acceptable range"). For example, in the horizontal direction, the information receptive range is 45 degrees or less in the left and right directions with respect to the front, 30 degrees or less in the upward direction with respect to the front, and 40 degrees or less in the downward direction with respect to the front. . As an example, if the information receptive range is 30 degrees to the right and 30 degrees to the left with respect to the front, the stable gaze field of the worker 300 is equal to the length L1 of the above-mentioned irradiation area R1 in the left-right direction D2. included.

Further, the average brightness of the display screen 61 of the electrical device 6 is generally set to 100 cd/m ² or more and 350 cd/m ² or less, regardless of the size of the display screen 61. For this reason, the average brightness of the first irradiation area R1 is set to 100 cd/m ² or more and 350 cd/m 2 so that the average brightness of the first irradiation area R1 of the irradiation surface S1 approaches the average brightness of the display screen 61 of the electrical equipment 6. It is preferable to control it to ² or less.

(5) Light color range of first illumination light and second illumination light Next, the light color range of first illumination light 101 and second illumination light 102 will be described with reference to FIG. 5. FIG. 5 is an xy chromaticity diagram of the CIE1931 color space.

In the work space WS1 (see FIG. 2) as described above, relatively highly saturated color light is not preferred, and relatively low chroma color light is preferred. Therefore, the light color range of the first illumination light 101 and the second illumination light 102 is preferably within the inner region R3 of the ellipse E1, as shown in FIG. The ellipse E1 has center coordinates (x, y) = (0.3333, 0.3333), a major axis of 0.1796, a minor axis of 0.1227, and an inclination of the major axis A1 with respect to the x-axis (x-axis and major axis). The angle θ1) formed with the axis A1 is defined by an ellipse of 40.984 degrees. That is, in the xy chromaticity diagram of the CIE1931 color space, the control unit 3 determines that the chromaticity of the first illumination light 101 and the second illumination light 102 is the chromaticity of the inner region R3 of the ellipse E1 defined by the ellipse formula. It is preferable to control the first light source 1A and the second light source 1B so that.

More preferably, the light color range of the first illumination light 101 and the second illumination light 102 is within the inner region R4 of the ellipse E2, as shown in FIG. The ellipse E2 has center coordinates (x, y) = (0.3333, 0.3333), a major axis of 0.1409, a minor axis of 0.0722, and an inclination of the major axis A1 with respect to the x axis ( The angle θ1) formed with the axis A1 is defined by an ellipse of 40.984 degrees.

Here, "P0" in FIG. 5 is the center point of the ellipses E1 and E2. Moreover, "P11" and "P12" in FIG. 5 are chromaticity points corresponding to the chromaticity of the first illumination light 101 in the fluctuation operation described later. More specifically, "P11" in FIG. 5 is the chromaticity point (the chromaticity point) of the first chromaticity corresponding to the maximum brightness of the first irradiation area R1 by the first illumination light 101 in the first period T1 (see FIG. 7). 1 chromaticity point). Moreover, "P12" in FIG. 5 is a chromaticity point (second chromaticity point) of the second chromaticity corresponding to the minimum brightness of the first irradiation area R1 by the first illumination light 101 in the first period T1. The first period T1 is a period during which a fluctuation operation described below is executed, and corresponds to a light amount change period. In the example of FIG. 5, the first chromaticity point P11 and the second chromaticity point P12 are included in the inner region R4 of the ellipse E2. Note that the second chromaticity at the second chromaticity point P12 is also the chromaticity of the first irradiation region R1 by the first illumination light 101 during the second period T2 (see FIG. 7) in which the fluctuation operation described below is not performed. .

Furthermore, in the example of FIG. 5, the closer the ellipses E1 and E2 are to the center point P0, the lower the saturation becomes. Therefore, the saturation of the first chromaticity point P11 located far from the center point P0 of the ellipses E1 and E2 is higher than the saturation of the second chromaticity point P12 located near the center point P0. In this manner, in the fluctuation operation described below, by irradiating the irradiation surface S1 with the first illumination light 101 of the first chromaticity with high saturation, the work in which the first illumination light 101 irradiated on the irradiation surface S1 is seen. It becomes possible to awaken the consciousness of the person 300. Furthermore, in the illumination system 10 according to the first embodiment, as shown in FIG. The two illumination lights 102 are mixed. This makes it possible to lower the stimulus purity of the first illumination light 101 compared to the case where only the first illumination light 101 is irradiated to the first irradiation region R1, and as a result, the light color of the first illumination light 101 is reduced. This makes it possible to slow down changes in the amount of stress caused by strong stimulation, and to alleviate discomfort caused by strong stimulation.

(6) Fluctuation Operation Next, the fluctuation motion that is executed when the control unit 3 determines that the worker 300 is drowsy will be described with reference to FIGS. 6 to 9. The “fluctuation operation” in the present disclosure refers to the amount of light of the first illumination light 101 irradiated from the first light source 1A toward the irradiation surface S1 (see FIG. 3) during the light amount change period (for example, the first period T1). This refers to the operation of changing the value at a predetermined period.

The horizontal axis in FIG. 6 indicates the temporal frequency of the first illumination light 101 in the first period T1, and the vertical axis in FIG. 6 indicates the amplitude gain of the first illumination light 101. Further, a solid line a1 in FIG. 6 is a polygonal line representing the upper limit value of the amplitude gain at each temporal frequency, and a dotted line a2 in FIG. 6 is a polygonal line representing the lower limit value of the amplitude gain at each temporal frequency. Here, the amplitude gain is the ratio of the brightness that is half the width of change when the light amount of the first illumination light 101 is changed to the average brightness of the irradiation surface S1 by the first illumination light 101 during the fluctuation operation. defined. Further, the first period T1 is a period in which the light amount of the first illumination light 101 is changed at a predetermined period, and corresponds to a light amount changing period.

If the amplitude gain is too small, that is, if the variation width of the light amount of the first illumination light 101 is too small, the luminance variation of the first irradiation area R1 of the irradiation surface S1 will also be small, and the operator 300 will be able to control the luminance of the first irradiation area R1. You may not notice the change. On the other hand, if the amplitude gain is too large, that is, if the range of change in the amount of light of the first illumination light 101 is too large, the change in brightness of the first irradiation region R1 of the irradiation surface S1 will increase, which may make the worker 300 feel uncomfortable. There is. Therefore, considering human breathing, the time frequency is 0.06 Hz or more since deep breathing is 4 to 6 times/minute, and from Figure 6, it is 1.0 Hz or less with a certain degree of amplitude tolerance. It is preferable. More preferably, since normal respiration is 10 to 24 times/min, the temporal frequency is preferably 0.16 Hz or more and 0.4 Hz or less.

FIG. 7 is a graph showing a change in brightness of the first irradiation region R1 when the temporal frequency is 0.1 Hz. The horizontal axis in FIG. 7 shows time, and the vertical axis in FIG. 7 shows the brightness of the first irradiation area R1. Further, T1 in FIG. 7 indicates a first period, and T2 in FIG. 7 indicates a second period. Here, the second period T2 is a period in which the amount of first illumination light 101 is constant. That is, in the second period T2, as shown in FIG. 7, the light amount of the first illumination light 101 is constant, for example, 93 cd/ ^m2 . Further, in the example of FIG. 7, the first period T1 is 30 seconds. That is, in the example of FIG. 7, the light intensity of the first illumination light 101 is changed at a temporal frequency of 0.1 Hz for 30 seconds. Therefore, in the example of FIG. 7, fluctuations for three cycles are given in the first period T1.

In the example of FIG. 7, the average luminance of the first irradiation area R1 is 93 cd/m ² during the second period T2 in which the fluctuation operation is not performed. Further, in the example of FIG. 7, in the first period T1 during which the fluctuation operation is performed, the maximum brightness of the first irradiation area R1 is 207 cd/m ² and the minimum brightness is 93 cd/m ² . Therefore, the average luminance of the first irradiation area R1 during the first period T1 is 150 cd/m ² . That is, the average brightness of the first irradiation area R1 by the first illumination light 101 in the first period T1 is the average brightness of the first irradiation area R1 by the first illumination light 101 in the second period T2 in which the light amount of the first illumination light 101 is constant. higher than the average brightness of

Further, the brightness change in the first period T1 is the maximum brightness of the first irradiation area R1 by the first illumination light 101 in the first period T1 with respect to the average brightness of the first irradiation area R1 by the first illumination light 101 in the first period T1. It is defined as a percentage of the brightness which is 1/2 of the difference between the brightness and the minimum brightness. In the example of FIG. 7, the luminance change in the first period T1 is {(207-93)/2}/150×100=38%.

FIG. 8 is a graph showing a change in brightness of the first irradiation region R1 when the temporal frequency is 0.5 Hz. The horizontal axis in FIG. 8 shows time, and the vertical axis in FIG. 8 shows the brightness of the first irradiation area R1. Further, T1 in FIG. 8 indicates a first period, and T2 in FIG. 8 indicates a second period. Here, the second period T2 is a period in which the amount of first illumination light 101 is constant. That is, in the second period T2, as shown in FIG. 8, the light amount of the first illumination light 101 is constant, for example, 131 cd/ ^m2 . Further, in the example of FIG. 8, the first period T1 is 6 seconds. That is, in the example of FIG. 8, the light intensity of the first illumination light 101 is changed at a temporal frequency of 0.5 Hz for 6 seconds. Therefore, in the example of FIG. 8, fluctuations for three cycles are given in the first period T1.

In the example of FIG. 8, the average luminance of the first irradiation area R1 is 131 cd/m ² during the second period T2 in which the fluctuation operation is not performed. Furthermore, in the example of FIG. 8, during the first period T1 during which the fluctuation operation is performed, the maximum brightness of the first irradiation area R1 is 168 cd/m ² and the minimum brightness is 132 cd/m ² . Therefore, the average luminance of the first irradiation area R1 during the first period T1 is 150 cd/m ² . That is, the average brightness of the first irradiation area R1 by the first illumination light 101 in the first period T1 is the average brightness of the first irradiation area R1 by the first illumination light 101 in the second period T2 in which the light amount of the first illumination light 101 is constant. higher than the average brightness of

Further, the brightness change in the first period T1 is the maximum brightness of the first irradiation area R1 by the first illumination light 101 in the first period T1 with respect to the average brightness of the first irradiation area R1 by the first illumination light 101 in the first period T1. It is defined as a percentage of the brightness which is 1/2 of the difference between the brightness and the minimum brightness. In the example of FIG. 8, the luminance change in the first period T1 is {(168-132)/2}/150×100=12%.

FIG. 9 is a graph showing a change in brightness of the first irradiation region R1 when the temporal frequency is 1.0 Hz. The horizontal axis in FIG. 9 indicates time, and the vertical axis in FIG. 9 indicates the brightness of the first irradiation area R1. Further, T1 in FIG. 9 indicates a first period, and T2 in FIG. 9 indicates a second period. Here, the second period T2 is a period in which the amount of first illumination light 101 is constant. That is, in the second period T2, as shown in FIG. 9, the light amount of the first illumination light 101 is constant, for example, 142 cd/ ^m2 . Furthermore, in the example of FIG. 9, the first period T1 is 3 seconds. That is, in the example of FIG. 9, the light intensity of the first illumination light 101 is changed for 3 seconds at a temporal frequency of 1.0 Hz. Therefore, in the example of FIG. 9, fluctuations for three cycles are given in the first period T1.

In the example of FIG. 9, the average luminance of the first irradiation area R1 is 142 cd/m ² during the second period T2 in which the fluctuation operation is not performed. Further, in the example of FIG. 9, in the first period T1 during which the fluctuation operation is performed, the maximum brightness of the first irradiation area R1 is 158 cd/ ^m2 , and the minimum brightness is 142 cd/ ^m2 . Therefore, the average luminance of the first irradiation area R1 during the first period T1 is 150 cd/m ² . That is, the average brightness of the first irradiation area R1 by the first illumination light 101 in the first period T1 is the average brightness of the first irradiation area R1 by the first illumination light 101 in the second period T2 in which the light amount of the first illumination light 101 is constant. higher than the average brightness of

Further, the brightness change in the first period T1 is the maximum brightness of the first irradiation area R1 by the first illumination light 101 in the first period T1 with respect to the average brightness of the first irradiation area R1 by the first illumination light 101 in the first period T1. It is defined as a percentage of the brightness which is 1/2 of the difference between the brightness and the minimum brightness. In the example of FIG. 9, the luminance change in the first period T1 is {(158-142)/2}/150×100=5%.

As described above, in the lighting system 10 according to the first embodiment, the control unit 3 controls the first period ( Light amount change period) The light amount of the first illumination light 101 in T1 is changed at a predetermined period. Then, 1 of the difference between the maximum brightness and minimum brightness of the first irradiation area R1 by the first illumination light 101 in the first period T1 with respect to the average brightness of the first irradiation area R1 by the first illumination light 101 in the first period T1. The percentage of brightness of /2 is 5% or more and 38% or less. Further, in the first embodiment, fluctuations for three cycles (change in light amount) are given in the first period T1, but the fluctuation is not limited to three cycles, and fluctuations for one cycle or two cycles are given in the first period T1. may be given, or fluctuations for 4 or 5 cycles may be given. In other words, it is sufficient to be configured to provide fluctuations of one period or more and five periods or less in the first period T1.

(7) Comparison with Comparative Example As a comparative example, there is a system that controls lighting in a viewing space in which a viewer is present to view an image in conjunction with an image displayed on a display screen of an electrical device. In the system according to the comparative example, at least one parameter of the light amount, light color, light distribution, and direction of the illumination in the viewing space is set to a corresponding parameter of a virtual image space that is imagined from the image projected on the display screen. One or more light sources provided in the viewing space are controlled so as to match. Thereby, the sense of realism of the image displayed on the display screen can be enhanced.

On the other hand, in the lighting system 10 according to the first embodiment, as described above, the worker 300 can operate the electrical equipment 6 while looking at the display screen 61 of the electrical equipment 6 in order to improve the efficiency of the work. The purpose is to create a work environment (lighting environment) that makes it easier to concentrate on the display screen 61, and the purpose is different from the system according to the above-mentioned comparative example.

(8) Effects In the illumination system 10 according to the first embodiment, the first illumination light 101 and the second illumination light 102 are irradiated onto the irradiation surface S1 located behind the electrical device 6. The first irradiation area R1 that is irradiated with the first illumination light 101 is narrower than the second irradiation area R2 that is irradiated with the second illumination light 102, and overlaps with the second irradiation area R2 at least in part. Then, the control section 3 changes the light amount of the first illumination light 101 during the light amount change period based on the detection result of the information detection section 5 at a predetermined period. This makes it possible to awaken the consciousness of the worker 300 compared to the case where the light intensity of the first illumination light 101 is not changed at a predetermined period. As a result, the worker 300 can easily concentrate on the display screen 61 of the electrical device 6, making it possible to improve the efficiency of work using the electrical device 6.

Furthermore, in the illumination system 10 according to the first embodiment, at least a portion of the first irradiation area R1 overlaps with the second irradiation area R2, compared to a case where the first irradiation area R1 does not overlap with the second irradiation area R2. This makes it possible to alleviate the discomfort caused to the worker 300.

Further, in the illumination system 10 according to the first embodiment, the saturation of the first illumination light 101 is higher than the saturation of the second illumination light 102. This makes it possible to further awaken the consciousness of the worker 300 compared to the case where the saturation of the first illumination light 101 and the saturation of the second illumination light 102 are equal.

Further, in the lighting system 10 according to the first embodiment, the above-mentioned predetermined period is 0.06 Hz or more and 1.0 Hz or less. This makes it possible to reduce the possibility that the worker 300 will feel uncomfortable compared to the case where the above-mentioned predetermined period is greater than 1.0 Hz.

In addition, in the illumination system 10 according to the first embodiment, the average brightness of the first irradiation area R1 by the first illumination light 101 in the first period T1 is compared to the average brightness of the first irradiation area R1 by the first illumination light 101 in the first period T1. The percentage of the brightness that is 1/2 of the difference between the maximum brightness and the minimum brightness is 5% or more and 38% or less. This makes it possible to awaken the consciousness of the worker 300 without making the worker 300 uncomfortable.

(9) Modifications Embodiment 1 is just one of various embodiments of the present disclosure. Embodiment 1 can be modified in various ways depending on the design, etc., as long as the objective of the present disclosure can be achieved. Modifications of the first embodiment will be listed below. The modified examples described below can be applied in combination as appropriate.

Lighting system 10 in the present disclosure includes a computer system. A computer system mainly consists of a processor and a memory as hardware. The functions of the lighting system 10 in the present disclosure are realized by a processor executing a program recorded in the memory of the computer system. The program may be pre-recorded in the memory of the computer system, may be provided through a telecommunications line, or may be recorded on a non-transitory storage medium readable by the computer system, such as a memory card, optical disc, hard disk drive, etc. may be provided. A processor in a computer system is comprised of one or more electronic circuits including semiconductor integrated circuits (ICs) or large scale integrated circuits (LSIs). The integrated circuits such as IC or LSI referred to herein have different names depending on the degree of integration, and include integrated circuits called system LSI, VLSI (Very Large Scale Integration), or ULSI (Ultra Large Scale Integration). Furthermore, an FPGA (Field-Programmable Gate Array), which is programmed after the LSI is manufactured, or a logic device that can reconfigure the connections inside the LSI or reconfigure the circuit sections inside the LSI, may also be used as a processor. I can do it. The plurality of electronic circuits may be integrated into one chip, or may be provided in a distributed manner over a plurality of chips. A plurality of chips may be integrated into one device, or may be distributed and provided in a plurality of devices. The computer system herein includes a microcontroller having one or more processors and one or more memories. Therefore, the microcontroller is also composed of one or more electronic circuits including semiconductor integrated circuits or large-scale integrated circuits.

Furthermore, it is not an essential configuration for the lighting system 10 that a plurality of functions in the lighting system 10 are integrated into one housing, and the components of the lighting system 10 are provided dispersedly in a plurality of housings. You can leave it there. Furthermore, at least some functions of the lighting system 10, for example, some functions of the control unit 3, may be realized by a cloud (cloud computing) or the like.

On the contrary, in Embodiment 1, at least some of the functions of the lighting system 10 that are distributed among a plurality of devices may be integrated into one housing. For example, some functions of the lighting system 10 that are distributed between the first drive unit 2A and the control unit 3 may be integrated into one housing.

In the first embodiment, the electrical device 6 is a notebook personal computer. On the other hand, the electrical device 6 is not limited to a notebook personal computer, but may be, for example, a desktop personal computer, a tablet terminal, or a smartphone. Furthermore, the electrical device 6 may be, for example, a television.

In the first embodiment, the first light source 1A and the second light source 1B are partition lighting arranged between the electrical device 6 and the irradiation surface S1 in the front-back direction D1. On the other hand, at least one of the first light source 1A and the second light source 1B is not limited to partition lighting, but can be used, for example, on the back of the electrical equipment 6 (the surface opposite to the surface on which the display screen 61 is provided). It may be a built-in lighting, a desk stand, or a base lighting attached to a ceiling surface.

In the first embodiment, each of the first light source 1A and the second light source 1B includes four types of LEDs. On the other hand, at least one of the first light source 1A and the second light source 1B includes, in addition to the four types of LEDs, an LED other than the four types of LEDs (for example, a highly saturated blue LED). Good too.

In the first embodiment, the first optical member 112 of the first light source 1A includes a linear Fresnel lens. On the other hand, the first optical member 112 may include a plurality of lenses in one-to-one correspondence with a plurality of LEDs of each type, instead of the linear Fresnel lens. Moreover, the first optical member 112 may further include a diffusion sheet.

In the first embodiment, the input receiving unit 4 receives input specifying a light amount target value and a light color target value from the chromaticity diagram and GUI displayed on the monitor screen. On the other hand, the input receiving unit 4 receives input specifying the light amount target value and the light color target value from a CUI (Character-based User Interface) such as a physical keyboard or a virtual keyboard displayed on a monitor screen. You can.

In the first embodiment, the camera included in the information detection unit 5 is a camera separate from the electrical equipment 6, but the camera included in the information detection unit 5 may be a camera mounted on the electrical equipment 6.

In the first embodiment, the information detection unit 5 includes a camera, but the information detection unit 5 may include, for example, an electroencephalograph that detects the brain waves (biological information) of the worker 300. In this case, the control unit 3 determines that the worker 300 is relaxed if alpha waves are included in the brain waves of the worker 300 detected by the electroencephalograph, and determines that the worker 300 is in a tense state if the alpha waves are not included. to decide. Then, the control unit 3 executes the above-mentioned fluctuation operation when the worker 300 is in a tense state.

Further, the information detection unit 5 may include a pulse sensor that detects the pulse wave (biological information) of the worker 300. In this case, the control unit 3 determines that the worker 300 is relaxed if the pulse wave detected by the pulse wave sensor is less than or equal to the threshold value, and determines that the worker 300 is in a tense state if it is greater than or equal to the threshold value. Then, the control unit 3 executes the above-mentioned fluctuation operation when the worker 300 is in a tense state.

Further, the feature quantity of the worker 300 extracted by the information detection unit 5 is not limited to the size of the eyes of the worker 300, but may be, for example, the ratio of the size of the eyes to the entire face of the worker 300.

In the first embodiment, as shown in FIGS. 7 to 9, there is one first period T1, but the number of first periods T1 is not limited to one. For example, a plurality of first periods T1 may be provided in a predetermined period. It may be. That is, the fluctuation operation may be performed multiple times in a predetermined period.

In the first embodiment, the illumination surface S1 is not included in the illumination system 10, but the illumination surface S1 may be included in the illumination system 10. That is, the illumination system 10 may further include a member (partition 200) having the irradiation surface S1. Thereby, it becomes possible to provide the illumination system 10 that integrally includes the irradiation surface S1.

(Embodiment 2)
A lighting system 10 according to a second embodiment will be described with reference to FIGS. 10 to 12. Regarding the illumination system 10 according to Embodiment 2, the same components as those in the illumination system 10 according to Embodiment 1 are given the same reference numerals, and the description thereof will be omitted.

The illumination system 10 according to the second embodiment is different from the illumination system 10 according to the first embodiment in that in addition to the fluctuation operation using the first illumination light 101, the illumination system 10 also performs the fluctuation operation using the second illumination light 102.

In the illumination system 10 according to the second embodiment, the control unit 3 changes the light amount of the first illumination light 101 in the first period T11. Further, in the illumination system 10 according to the second embodiment, the control unit 3 changes the light amount of the second illumination light 102 in the second period T21. That is, in the illumination system 10 according to the second embodiment, in addition to the fluctuation operation by the first illumination light 101, the fluctuation operation by the second illumination light 102 is also performed. As shown in FIGS. 10A and 10B, the second period T21 is a period different from the first period T11 as the light amount change period.

In the lighting system 10 according to the second embodiment, as shown in FIG. 10A, the first period T11 is a period from time t12 to time t13, a period from time t14 to time t15, or a period from time t16 to time t17. It is. Furthermore, in the lighting system 10 according to the second embodiment, as shown in FIG. 10B, the second period T21 is a period from time t11 to time t18. That is, in the illumination system 10 according to the second embodiment, the fluctuation operation using the first illumination light 101 is performed three times while the fluctuation operation using the second illumination light 102 is performed. Furthermore, in the illumination system 10 according to the second embodiment, the fluctuation operation by the first illumination light 101 is started at timings t12, t14, and t16 when the light intensity of the second illumination light 102 is different. Moreover, in the illumination system 10 according to the second embodiment, as shown in FIG. 10B, the second illumination light 102 changes so that the amount of light decreases over time. Thus, in the lighting system 10 according to the second embodiment, the length of the second period T21 is longer than the length of the first period T11. The second period T21 is, for example, 24 hours. The first period T11 is, for example, 30 seconds. That is, in the illumination system 10 according to the second embodiment, the second illumination light 102 performs the fluctuation operation in a circadian rhythm (circadian rhythm) in which the second period T21 is one cycle.

(2) Effects Also in the illumination system 10 according to the second embodiment, by changing the light amount of the first illumination light 101 in the first period (light amount change period) T11 at a predetermined period based on the detection result of the information detection unit 5, , it is possible to awaken the consciousness of the worker 300 compared to the case where the light intensity of the first illumination light 101 is not changed at a predetermined period. As a result, the worker 300 can easily concentrate on the display screen 61 of the electrical device 6, making it possible to improve the efficiency of work using the electrical device 6.

Furthermore, in the illumination system 10 according to the second embodiment, at least a portion of the first irradiation area R1 overlaps with the second irradiation area R2, and when the first irradiation area R1 does not overlap with the second irradiation area R2, In comparison, it is possible to alleviate the discomfort given to the worker 300.

Furthermore, in the illumination system 10 according to the second embodiment, the length of the second period T21 in which the amount of light of the second illumination light 102 is changed is longer than the length of the first period T11 in which the amount of light of the first illumination light 101 is changed. . This makes it possible to adjust the brightness of the irradiation surface S1 while making it difficult to notice the change in the brightness of the irradiation surface S1 due to the second illumination light 102.

(3) Modification Examples Modification examples of the second embodiment will be listed below. The modified examples described below can be applied in combination as appropriate.

(3.1) Modification example 1
The illumination system 10 according to the first modification is different from the illumination system 10 according to the second embodiment in that the light amount of the second illumination light 102 is changed (increased) in accordance with the decrease in the sensitivity of the eyes of the worker 300. . Hereinafter, the illumination system 10 according to Modification 1 will be described with reference to FIGS. 11A and 11B.

In the lighting system 10 according to the first modification, as shown in FIG. 11A, the period from time t22 to time t23, the period from time t24 to time t25, and the period from time t26 to time t27 are the first period T12. be. That is, the control unit 3 performs a fluctuation operation using the first illumination light 101 in each of the first periods T12 described above. More specifically, the control unit 3 starts the fluctuation operation using the first illumination light 101 at time t22, time t24, and time t26 when the light intensity of the second illumination light 102 is different.

Further, in the illumination system 10 according to the first modification, as shown in FIG. 11B, the control unit 3 performs a fluctuation operation using the second illumination light 102 in a second period T22 from time t21 to time t28. More specifically, in the second period T22, the control unit 3 increases the light amount of the second illumination light 102 in accordance with the decrease in the sensitivity of the worker's 300 eyes over time. That is, also in the illumination system 10 according to the first modification, the control unit 3 changes the light amount of the second illumination light 102 in the second period T22, which is different from the first period T12 as the light amount changing period. Also, in the lighting system 10 according to the first modification, the length of the second period T22 is longer than the length of the first period T12. The second period T22 is, for example, one hour. The first period T12 is, for example, 30 seconds.

In the illumination system 10 according to the first modification, the control unit 3 changes (increases) the amount of second illumination light 102 as the sensitivity of the eyes of the worker 300 decreases over time. Thereby, the contrast with the first illumination light 101 can be increased, and as a result, the worker 300 can easily see the display screen 61 of the electrical device 6, thereby improving work efficiency.

(3.2) Modification 2
The illumination system 10 according to the second modification is different from the illumination system 10 according to the second embodiment in that the second illumination light 102 performs the fluctuation operation in an ultradian rhythm with the second period T23 as one cycle. Hereinafter, the illumination system 10 according to Modification 2 will be described with reference to FIGS. 12A and 12B.

In the lighting system 10 according to the second modification, as shown in FIG. 12A, the period from time t32 to time t33, the period from time t34 to time t35, and the period from time t36 to time t37 are the first period T13. be. That is, the control unit 3 performs a fluctuation operation using the first illumination light 101 in each of the first periods T13 described above. More specifically, the control unit 3 starts the fluctuation operation using the first illumination light 101 at time t32, time t34, and time t36 when the light intensity of the second illumination light 102 is different.

Further, in the illumination system 10 according to the second modification, as shown in FIG. 12B, the control unit 3 performs a fluctuation operation using the second illumination light 102 in a second period T23 from time t31 to time t38. More specifically, in the second period T23, the control unit 3 once increases the amount of light of the second illumination light 102, then decreases it, and then increases it again. That is, also in the illumination system 10 according to the second modification, the control unit 3 changes the light amount of the second illumination light 102 in the second period T23, which is different from the first period T13 as the light amount changing period. Also, in the lighting system 10 according to the second modification, the length of the second period T23 is longer than the length of the first period T13. The second period T23 is, for example, about 30 minutes to 4 hours. The first period T13 is, for example, 30 seconds. That is, in the illumination system 10 according to the second modification, the fluctuation operation by the second illumination light 102 is performed in an ultradian rhythm in which the second period T23 is one cycle.

(3.3) Other modified examples Other modified examples are listed below.

In the second embodiment and the first and second modified examples, the lengths of the second periods T21, T22, and T23 are longer than the lengths of the first periods T11, T12, and T13. On the other hand, the length of the second period may be the same as the length of the first period. In this case, depending on the timing of changing the light intensity of the first illumination light 101 and the timing of changing the light intensity of the second illumination light 102, it is possible to increase the amount of change in the first illumination light 101 with respect to the second illumination light 102. Become.

Furthermore, the configuration described in Embodiment 2 (including modified examples) can be applied in appropriate combination with the configuration described in Embodiment 1 (including modified examples).

(mode)
The following aspects are disclosed herein.

The illumination system (10) according to the first aspect includes a first light source (1A), a second light source (1B), a control section (3), and an information detection section (5). The first light source (1A) irradiates the first irradiation region (R1) of the irradiation surface (S1) with first illumination light (101). The second light source (1B) irradiates the second irradiation region (R2) of the irradiation surface (S1) with second illumination light (102). The irradiation surface (S1) is located behind the electrical device (6) having the display screen (61). A control unit (3) controls a first light source (1A) and a second light source (1B). The information detection unit (5) detects biometric information of the user of the electrical device (6). The first irradiation area (R1) is narrower than the second irradiation area (R2). At least a portion of the first irradiation region (R1) overlaps with the second irradiation region (R2). The control unit (3) changes the light intensity of the first illumination light (101) in the light intensity change period (T1) at a predetermined period based on the user's biological information which is the detection result of the information detection unit (5).

According to this aspect, it is possible to improve the efficiency of work using the electrical equipment (6).

In the illumination system (10) according to the second aspect, in the first aspect, the saturation of the first illumination light (101) is higher than the saturation of the second illumination light (102).

According to this aspect, it is possible to further awaken the consciousness of the worker (300) compared to the case where the saturation of the first illumination light (101) and the saturation of the second illumination light (102) are equal. Become.

In the lighting system (10) according to the third aspect, in the first or second aspect, the predetermined period is 0.06 Hz or more and 1.0 Hz or less.

According to this aspect, it is possible to reduce the possibility that the worker (300) feels uncomfortable.

In the illumination system (10) according to the fourth aspect, in any one of the first to third aspects, the first irradiation area (R1) is The percentage of the brightness of 1/2 of the difference between the maximum brightness and the minimum brightness of the first irradiation area (R1) by the first illumination light (101) during the light amount change period (T1) with respect to the average brightness is 5% or more, It is 38% or less.

According to this aspect, it is possible to awaken the consciousness of the worker (300) without making the worker (300) uncomfortable.

In the illumination system (10) according to the fifth aspect, in any one of the first to fourth aspects, the control unit (3) controls the second illumination light ( 102). The second period (T21, T22, T23) is a period different from the first period (T11, T12, T13) as the light amount change period (T11, T12, T13).

According to this aspect, it is possible to reduce the variation width of the first illumination light (101) with respect to the second illumination light (102), and as a result, it is possible to further alleviate the discomfort of the worker (300). becomes.

In the illumination system (10) according to the sixth aspect, in the fifth aspect, the length of the second period (T21, T22, T23) is longer than the length of the first period (T11, T12, T13).

According to this aspect, it is possible to adjust the brightness (luminance) of the irradiated surface (S1) while making it difficult to notice a change in the brightness of the irradiated surface (S1) due to the second illumination light (102).

In the illumination system (10) according to the seventh aspect, in the fifth aspect, the length of the second period (T21, T22, T23) is the same as the length of the first period (T11, T12, T13). .

According to this aspect, it is possible to increase the amount of change in the first illumination light (101) with respect to the second illumination light (102).

In the illumination system (10) according to the eighth aspect, in any one of the first to seventh aspects, in the second irradiation region (R2), the brightness is highest at the lower part of the second irradiation region (R2). .

According to this aspect, the brightness in the line of sight of the worker (300) can be increased, and the visibility of the display screen (61) of the electrical device (6) is improved.

The illumination system (10) according to the ninth aspect, in any one of the first to eighth aspects, further includes a member (200) having an irradiation surface (S1).

According to this aspect, it is possible to provide an illumination system (10) that is integrally equipped with the irradiation surface (S1).

In the illumination system (10) according to the tenth aspect, in any one of the first to ninth aspects, the first light source (1A) includes a first light emitting section (111) and a first optical member (112). ) and has. The first optical member (112) is located in front of the first light emitting section (111), condenses the light emitted from the first light emitting section (111), and emits it as first illumination light (101). The second light source (1B) includes a second light emitting section (121) and a second optical member (122). The second optical member (122) is located in front of the second light emitting section (121), and diffuses the light emitted from the second light emitting section (121) to emit it as second illumination light (102).

According to this aspect, it is possible to form the first irradiation region (R1) in a desired range while forming the second irradiation region (R2) in a wide range on the irradiation surface (S1).

The configurations according to the second to tenth aspects are not essential to the lighting system (10) and can be omitted as appropriate.

1A First light source 1B Second light source 3 Control section 5 Information detection section 6 Electrical equipment 61 Display screen 10 Lighting system 101 First illumination light 102 Second illumination light 111 First light emitting section 112 First optical member 121 Second light emitting section 122 Second optical member 200 partition (member)
300 Operator (user)
R1 First irradiation area R2 Second irradiation area S1 Irradiation surface T1, T11, T12, T13 First period (light amount change period)
T21, T22, T23 2nd period

Claims (10)

a first light source that irradiates first illumination light to a first irradiation area of an irradiation surface located behind an electrical device having a display screen;
a second light source that irradiates a second illumination light onto a second irradiation area of the irradiation surface;
a control unit that controls the first light source and the second light source;
an information detection unit that detects biological information of a user of the electrical device,
The first irradiation area is narrower than the second irradiation area,
At least a portion of the first irradiation area overlaps with the second irradiation area,
The control unit changes the light amount of the first illumination light in a light amount change period at a predetermined period based on the biological information of the user that is a detection result of the information detection unit.
lighting system. The saturation of the first illumination light is higher than the saturation of the second illumination light.
A lighting system according to claim 1. The predetermined period is 0.06Hz or more and 1.0Hz or less,
A lighting system according to claim 1 or 2. 1/2 of the difference between the maximum brightness and minimum brightness of the first irradiation area by the first illumination light during the light amount change period with respect to the average brightness of the first irradiation area by the first illumination light during the light amount change period. The percentage of brightness of is 5% or more and 38% or less,
A lighting system according to claim 1 or 2. The control unit changes the light amount of the second illumination light in a second period different from the first period as the light amount changing period.
A lighting system according to claim 1 or 2. The length of the second period is longer than the length of the first period.
A lighting system according to claim 5. The length of the second period is the same as the length of the first period,
A lighting system according to claim 5. In the second irradiation area, the brightness at the bottom of the second irradiation area is highest;
A lighting system according to claim 1 or 2. further comprising a member having the irradiation surface;
A lighting system according to claim 1 or 2. The first light source is
a first light emitting section;
a first optical member located in front of the first light emitting section, which diffuses the light emitted from the first light emitting section and emits it as the first illumination light;
The second light source is
a second light emitting section;
a second optical member located in front of the second light emitting section, which collects light emitted from the second light emitting section and emits it as the second illumination light;
A lighting system according to claim 1 or 2.

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