JP2021051975A - Lighting control system, lighting device, and lighting control method - Google Patents

Abstract

To provide a lighting control system, a lighting device, and a lighting control method that can enhance user's comfort.SOLUTION: A lighting control system includes a light source control unit, a time measurement unit, a trigger generation unit, and a determination unit. The light source control unit controls the light source unit. The time measurement unit measures a lights-out time which is a time elapsing since the light source unit has been subjected to lights-out control. The trigger generation unit generates a dark lighting trigger. When the dark lighting trigger occurs, the determination unit makes a dark lighting determination as to whether a dark lighting condition is satisfied. The dark lighting condition includes a condition that the lights-out time is equal to or longer than a threshold time. When the dark lighting condition is satisfied, the light source control unit turns on the light source in a dark lighting mode in which a dimming level is lower than that in a full lighting mode.SELECTED DRAWING: Figure 1

Description

The present invention relates to a lighting control system, a lighting device, and a lighting control method.

Conventionally, a lighting device (lighting device) with a human body sensor capable of switching lighting contents has been disclosed (see, for example, Patent Document 1).

The luminaire with a human body sensor described in Patent Document 1 includes a human body detection unit, a power control unit, a lighting load (light source unit), and a control content switching means. The power control unit controls the load power according to the detection output of the human body detection unit. The lighting load is controlled by the power control unit. The control content switching means switches the lighting method and the lighting content when the human body detection unit reacts.

Japanese Unexamined Patent Publication No. 9-223585

In Patent Document 1, when the human body detection unit reacts in a preset night time zone, the illumination load is lit at a dimming level lower than the normal lighting level. Therefore, in Patent Document 1, for example, when the lighting load is turned on at a normal lighting level in the night time zone, it is necessary to switch the lighting content, which is troublesome. In addition, if the user forgets to restore the lighting contents, for example, when he / she wakes up to go to the bathroom at midnight, the lighting load will be lit at the normal lighting level, and there is a risk that he / she will awaken and fall asleep. there were.

A main object of the present disclosure is to provide a lighting control system, a lighting device, and a lighting control method capable of improving user comfort.

The lighting control system according to one aspect of the present disclosure includes a light source control unit, a time measurement unit, a trigger generation unit, and a determination unit. The light source control unit controls the light source unit. The time measuring unit measures the extinguishing time, which is the elapsed time after the light source unit is controlled to extinguish. The trigger generation unit generates a dark lighting trigger. When the dark lighting trigger occurs, the determination unit makes a dark lighting determination as to whether or not the dark lighting condition is satisfied. The dark lighting condition includes a condition that the extinguishing time is equal to or longer than the threshold time. When the dark lighting condition is satisfied, the light source control unit lights the light source in a dark lighting mode in which the dimming level is lower than that in the all lighting mode.

The lighting device according to one aspect of the present disclosure includes the lighting control system, the light source, and an instrument main body that supports the light source.

The lighting control method according to one aspect of the present disclosure is a lighting control method for controlling a light source, which includes a step of measuring an extinguishing time which is an elapsed time after controlling the extinguishing of the light source, and a dark lighting trigger When it occurs, if the dark lighting condition including the condition that the extinguishing time is equal to or longer than the threshold time is satisfied, the light source is turned on in the dark lighting mode in which the dimming level is lower than that of all lighting.

FIG. 1 is a block diagram of a lighting device including the lighting control system according to the first embodiment. FIG. 2 is a schematic view of the usage environment of the lighting control system of the above. FIG. 3 is a schematic configuration diagram of a controller included in the lighting device of the same. FIG. 4 is a flowchart of a first operation example of the lighting control system of the above. FIG. 5 is a flowchart of a second operation example of the lighting control system of the above. FIG. 6 is a block diagram of the lighting control system according to the first modification of the first embodiment.

Hereinafter, an example of a preferred embodiment in which the present invention has been carried out will be described. However, the following embodiments are merely examples. The present invention is not limited to the following embodiments.

Further, in each drawing referred to in the embodiment and the like, members having substantially the same function are referred to by the same reference numerals.

(Embodiment 1)
(1) Outline FIG. 1 shows a block diagram of the lighting control system 1 according to the present embodiment.

The lighting control system 1 of the present embodiment is configured to control the lighting state of the light source unit 2. The light source unit 2 includes a plurality of light sources. The light source is, for example, an LED (Light Emitting Diode). The lighting control system 1 includes a light source control unit 11, a time measurement unit 12, a trigger generation unit 13, and a determination unit 14.

The light source control unit 11 controls the light source unit 2. The time measuring unit 12 measures the extinguishing time, which is the elapsed time since the light source unit 2 is controlled to extinguish. The trigger generation unit 13 generates a dark lighting trigger. When the dark lighting trigger occurs, the determination unit 14 determines whether or not the dark lighting condition is satisfied.

The dark lighting condition includes a condition that the extinguishing time is equal to or longer than the threshold time. When the dark lighting condition is satisfied, the light source control unit 11 lights the light source unit 2 in the dark lighting mode in which the dimming level is lower than that in the all lighting mode.

The lighting control system 1 of the present embodiment is used, for example, in the lighting device 100. The lighting device 100 according to the present embodiment includes a lighting control system 1, a light source unit 2, and an instrument main body 30. The instrument body 30 supports the light source unit 2. Further, the lighting device 100 has a controller 4 that receives an operation from the user. The controller 4 is configured to output a control instruction based on the operation content from the user to the lighting control system 1 using a wireless signal as a medium.

The lighting device 100 of the present embodiment is provided on the ceiling 91 of the bedroom 9 as an example (see FIG. 2). In the example shown in FIG. 2, a bed 90 is provided in the bedroom 9. In FIG. 2, the user U1 in the state of sleeping on the bed 90 is described by a dashed-dotted line, and the user U1 in the state of waking up is described by a solid line.

For example, the user operates the controller 4 to turn off the light source when going to bed. Then, when the user wakes up at midnight and goes to the bathroom, he / she may turn on the light source to check his / her feet. Here, the lighting control system 1 of the present embodiment is configured to control the lighting state of the light source unit 2 according to the length of the extinguishing time. When the extinguishing time is equal to or longer than the threshold time, the illumination control system 1 turns on the light source unit 2 in the dark lighting mode. The “dark lighting” in the present disclosure means lighting in a state where the dimming level of the light source unit 2 is lower than that in normal lighting. Normal lighting includes all lighting in which the dimming rate of the light source unit 2 is 100%. For example, in the lighting rule standard (JIS Z9110-2010) of Japanese Industrial Standards (JIS), the living room of a house (JIS Z9110-2010). Lighting that provides the brightness (maintenance illuminance) required for work (reading, makeup, grouping, etc.) in the living room, study, bedroom, etc. Normal lighting is, for example, lighting that can obtain an illuminance of 200 lp or more. The dark lighting is a lighting that can obtain an illuminance to the extent that the feet can be visually recognized in the dark adaptation state, and is, for example, a lighting that can obtain an illuminance of 50 lpx or less. Therefore, even when the user's eyes are accustomed to the dark place due to dark adaptation, the user can visually recognize his / her feet. Further, it is suppressed that the user feels the light of the light source unit 2 dazzling, and it is suppressed that the user is awake and has trouble falling asleep.

Further, the user may temporarily turn off the light source unit 2 and then turn it on again. In such a case, the user may be in a light adaptation state at the time of relighting. If the extinguishing time is less than the threshold time, the illumination control system 1 turns on the light source unit 2 in the normal mode. The normal mode is an operation mode in which the light source unit 2 is turned on in the lighting state before the extinguishing control is performed. Therefore, it is suppressed that the user feels that the room is dark after the lighting is turned on again.

As described above, in the lighting control system 1 of the present embodiment, the light source unit 2 is turned on in a lighting state according to the user's visual environment without switching the lighting mode, so that the user's comfort can be improved. it can.

(2) Details Hereinafter, details of the lighting control system 1 and the lighting device 100 will be described with reference to FIG.

(2.1) Lighting Control System The lighting control system 1 includes a light source control unit 11, a time measurement unit 12, a trigger generation unit 13, and a determination unit 14. Further, the lighting control system 1 further includes a clock unit 15 and a time zone setting unit 16.

The lighting control system 1 includes, for example, a microcomputer including a processor and a memory. Then, when the processor executes the program stored in the memory, the microcomputer causes the light source control unit 11, the time measurement unit 12, the trigger generation unit 13, the determination unit 14, the clock unit 15, and the time zone setting unit 16. Functions as. The program executed by the processor is recorded in advance in the memory of the microcomputer here, but may be recorded in a non-temporary recording medium such as a memory card and provided, or provided through a telecommunications line such as the Internet. May be done. Further, the lighting control system 1 may be configured such that a plurality of functions are distributed to a plurality of microcomputers.

The lighting control system 1 is configured to be driven by the electric power supplied from the power supply circuit 31. The power supply circuit 31 is provided in the instrument main body 30. The power supply circuit 31 is electrically connected to the commercial power supply E1 via the switch SW1. The switch SW1 is provided, for example, on the wall of a room, and electrically conducts / cuts off between the power supply circuit 31 and the commercial power supply E1 by a user operation. The commercial power source E1 outputs AC power. The power supply circuit 31 is an AC-DC converter having a rectifier circuit, a step-up circuit, a step-down circuit, and the like. The power supply circuit 31 converts the AC voltage from the commercial power supply E1 into a predetermined DC voltage and outputs it to the lighting control system 1.

The light source control unit 11 is configured to control the light source unit 2. Specifically, the light source control unit 11 turns on and off the light source unit 2 by controlling the lighting circuit 32. The lighting circuit 32 is electrically connected to the commercial power supply E1 via the switch SW1. The lighting circuit 32 is an AC-DC converter having a rectifier circuit, a step-up circuit, a step-down circuit, and the like. The lighting circuit 32 lights the light source unit 2 by converting the AC power from the commercial power source into DC power and supplying it to the light source unit 2. A part of the lighting circuit 32 and the power supply circuit 31 may be shared.

Further, the light source control unit 11 controls the lighting state of the light source unit 2. The lighting state of the light source unit 2 is the dimming level of the light source unit 2 and the degree of the toning level. The dimming level is the magnitude of the light output of the light source unit 2. When the dimming level is maximum, the light source unit 2 is rated lit (all lit). The toning level is the color temperature of the light output by the light source unit 2. In the present embodiment, the light source unit 2 can be color-adjusted when the color temperature is, for example, between about 3000K and about 6500K. The light output by the light source unit 2 becomes a warm light bulb color when the color temperature is 3000 K, and becomes a cool daylight color when the color temperature is 6500 K. The light source control unit 11 controls the light source unit 2 for dimming control and color matching control by controlling the lighting circuit 32. Further, when the switch SW1 is in the off state, the power supply to the light source unit 2 and the lighting control system 1 is stopped, so that the light source unit 2 is turned off.

Further, when the switch SW1 is turned on and the power is supplied to start the light source control unit 11, the light source control unit 11 lights the light source unit 2 in the lighting state before the stop (before the switch SW1 is turned off). Specifically, the lighting state (dimming level, toning level) of the light source unit 2 is stored in the memory. The light source control unit 11 refers to the memory at the time of startup, and lights the light source unit 2 in the lighting state (dimming level, toning level) before the stop.

Further, the lighting device 100 of the present embodiment further includes an auxiliary light source unit 20. The auxiliary light source unit 20 includes one or more light sources (for example, LEDs). The auxiliary light source unit 20 has a smaller number of light source units 2 and a smaller amount of light than the light source unit 2. The auxiliary light source unit 20 is used, for example, as a nightlight. The auxiliary light source unit 20 is lit by the electric power supplied from the lighting circuit 32.

The time measuring unit 12 is configured to measure the extinguishing time, which is the elapsed time since the light source unit 2 is controlled to extinguish. The "light-off control" in the present disclosure is a control in which the light source control unit 11 turns off the light source unit 2 by stopping the power supply from the lighting circuit 32 to the light source unit 2. Therefore, turning off the light source unit 2 by turning off the switch SW1 is not included in the turning-off control. That is, the time when the switch SW1 is off is not included in the turn-off time. Further, the auxiliary light source unit 20 may be lit during the extinguishing control of the light source unit 2. That is, if the light source unit 2 is being turned off, the extinguishing time increases regardless of whether the auxiliary light source unit 20 is turned on or off.

When the light source control unit 11 starts the extinguishing control, the time measuring unit 12 starts counting the extinguishing time. Further, when the light source control unit 11 starts the bright lighting control or the power supply from the power supply circuit 31 is stopped, the time measuring unit 12 stops counting the extinguishing time and discards the counting result. The "bright lighting control" in the present disclosure is a control in which the light source control unit 11 lights the light source unit 2 in the full lighting mode or the normal lighting mode. The bright lighting control does not include a dark lighting control in which the light source control unit 11 lights the light source unit 2 in the dark lighting mode. Therefore, even when the light source control unit 11 turns on the light source unit 2 in the dark lighting mode, the counting of the extinguishing time is continued.

The trigger generation unit 13 is configured to generate a dark lighting trigger. The dark lighting trigger is, for example, a predetermined signal. The trigger generation unit 13 acquires the detection result of the wake-up sensor 33 that detects the wake-up of the user. The trigger generation unit 13 generates a dark lighting trigger based on the detection result of the wake-up sensor 33. Specifically, the trigger generation unit 13 generates a dark lighting trigger when the wake-up sensor 33 detects that the user has woken up.

The wake-up sensor 33 is configured to detect the wake-up of the user. In the present embodiment, the wake-up sensor 33 is provided on the fixture main body 30 of the lighting device 100. The wake-up sensor 33 is, for example, a microwave sensor (Doppler sensor) and includes a wave transmitting unit and a receiving unit. The wake-up sensor 33 transmits a radio wave signal (wave transmission signal) from the wave transmission unit, and receives a radio wave signal (reception signal) reflected by an object (for example, a user). The wake-up sensor 33 measures the distance between the object and the object based on the phase difference between the transmitted signal and the received signal. The wake-up sensor 33 detects the user's wake-up based on the distance to the object and the change in the distance. In the wake-up sensor 33, for example, when the distance to the object is less than the threshold distance and the change width of the distance in a predetermined period is equal to or more than the threshold width, the user is standing (or moving), that is, Judge that it is awake. The wake-up sensor 33 determines that the user is sleeping, for example, when the distance to the object is equal to or greater than the threshold distance and the change width of the distance in a predetermined period is less than the threshold width. The wake-up sensor 33 wakes up when the distance to the object changes from less than the threshold distance to more than the threshold distance, or when the change width of the distance in a predetermined period changes from less than the threshold width to more than the threshold width. Judge. Further, the wake-up sensor 33 determines that the user is absent when the change width of the distance to the user in the predetermined period is less than the predetermined value. The threshold distance, threshold width, etc. used by the wake-up sensor 33 for the user's wake-up determination and the like can be appropriately changed according to the usage environment.

Further, the trigger generation unit 13 acquires the reception result of the signal reception unit 34. The signal receiving unit 34 is provided in the appliance main body 30 of the lighting device 100, and is configured to be able to receive a wireless signal from the controller 4. The trigger generation unit 13 generates a dark lighting trigger based on the signal received by the signal reception unit 34. Specifically, the trigger generation unit 13 generates a dark lighting trigger when the signal receiving unit 34 receives the dark lighting signal from the controller 4. The detailed configuration of the controller 4 will be described later.

That is, the trigger generation unit 13 generates a dark lighting trigger when either the wake-up sensor 33 detects the user's wake-up or the signal receiving unit 34 receives the dark lighting signal.

Further, the trigger generation unit 13 is configured so as not to generate a dark lighting trigger when the light source unit 2 is lit. The term "light source unit 2 is lit" as used herein means that the light source unit 2 is controlled to be dimly lit or brightly lit. That is, the dark lighting trigger can be generated only when the light source unit 2 is off.

When the trigger generation unit 13 generates a dark lighting trigger, the determination unit 14 determines whether or not the dark lighting condition is satisfied. In the present embodiment, the dark lighting condition includes the first to third conditions. When all of the first to third conditions are satisfied, the determination unit 14 determines that the dark lighting condition is satisfied.

The first condition is that the extinguishing time is equal to or longer than the threshold time. When the dark lighting trigger occurs, the determination unit 14 acquires the measurement result of the extinguishing time from the time measuring unit 12. The determination unit 14 compares the acquired extinguishing time with the first threshold time (threshold time). The first threshold time is, for example, 10 minutes. The determination unit 14 determines that the first condition is satisfied when the extinguishing time is equal to or longer than the first threshold time, and when the extinguishing time is less than the first threshold time, the first condition is not satisfied. judge. Further, in the present embodiment, the determination unit 14 compares the extinguishing time with the second threshold time. The second threshold time is a time longer than the first threshold time, for example, 30 minutes. The values of the first threshold time and the second threshold time are examples, and are not limited to the above. For example, the first threshold time may be 15 minutes, 30 minutes, or the like, and the second threshold time may be 1 hour, 2 hours, or the like.

The second condition is that the current time is within the dark lighting time zone. The determination unit 14 acquires date and time information including the current time information from the clock unit 15. The clock unit 15 is configured to measure the time and holds the current time information. Further, the clock unit 15 has a calendar function and holds the current date information. The date information includes information on the current date and day of the week. When the dark lighting trigger occurs, the determination unit 14 acquires the date and time information including the time information and the date information from the clock unit 15. The determination unit 14 determines whether or not the current time is within the dark lighting time zone. If the current time is within the dark lighting time zone, the determination unit 14 determines that the second condition is satisfied, and if the current time is outside the dark lighting time zone, the second condition is not satisfied. judge.

The dark lighting time zone is a time zone in which dark lighting of the light source unit 2 is permitted. In other words, the light source unit 2 can be dimly lit only during the dim lighting time zone. The dark lighting time zone is set according to, for example, the time zone in which the user plans to sleep. In the present embodiment, the dark lighting time zone can be set to a different time zone for each day of the week or each day. The determination unit 14 determines whether or not the current time is within the dark lighting time zone corresponding to the current date or day of the week.

The time zone setting unit 16 is configured to set the dark lighting time zone based on the history of the extinguishing time. Specifically, the memory stores the history of the start time of the extinguishing time. The time zone setting unit 16 acquires the history of the start time of the extinguishing time stored in the memory. Then, the time zone setting unit 16 sets a time based on a representative value (for example, an average value, a mode value, a median value, etc.) of the start time of the extinguishing time as the start time of the dark lighting time zone. The start time of the dark lighting time zone set by the time zone setting unit 16 may be, for example, a representative value of the start time of the extinguishing time, or may be a predetermined time (for example, 30 minutes) after the representative value. Good.

Further, the memory stores a history of the time (wake-up time) when the wake-up sensor 33 detects the user's wake-up. The time zone setting unit 16 acquires the history of the wake-up time stored in the memory. Then, the time zone setting unit 16 sets the time based on the representative value of the wake-up time (for example, the average value, the mode value, the median value, etc.) as the end time of the dark lighting time zone. The end time of the dark lighting time zone set by the time zone setting unit 16 may be, for example, a representative value of the wake-up time, or may be a predetermined time (for example, 30 minutes) after the representative value.

Further, the time zone setting unit 16 sets the dark lighting time zone for each day of the week based on the history of the start time of the extinguishing time and the history of the wake-up time for each day of the week. For example, when the wake-up time of a holiday (Saturday, Sunday, and a holiday) tends to be later than that of a weekday (Monday to Friday), the time zone setting unit 16 sets the end time of the dark lighting time zone corresponding to the holiday. Set to be slower than weekdays. Further, when the start time of the extinguishing time before the holiday tends to be later than the start time of the extinguishing time before the non-holiday, the time zone setting unit 16 sets the start time of the corresponding dark lighting time zone before the holiday. Set to be slower than before non-holiday. In this way, the time zone setting unit 16 sets the dark lighting time zone according to the user's daily rhythm.

The third condition is that the brightness level around the light source unit 2 is less than the threshold level. The lighting device 100 of the present embodiment further includes a brightness sensor 35 for measuring brightness. The brightness sensor 35 is provided on the instrument main body 30 so as to measure the brightness around the light source unit 2. The brightness sensor 35 has, for example, a photodiode, and is configured to output a signal of a level (brightness level) corresponding to the brightness. When the dark lighting trigger occurs, the determination unit 14 compares the measurement result (brightness level) of the brightness sensor 35 with the threshold level. The determination unit 14 determines that the third condition is satisfied when the brightness level is less than the threshold level, and determines that the third condition is not satisfied when the brightness level is equal to or higher than the threshold level. .. That is, the third condition is satisfied in a dark time zone such as night, and the third condition is not satisfied in a bright time zone such as morning and noon.

When the trigger generation unit 13 generates a dark lighting trigger, the determination unit 14 determines whether or not the dark lighting condition is satisfied. Specifically, the determination unit 14 determines whether or not the first to third conditions are satisfied when the dark lighting trigger occurs. When all the conditions of the first to third conditions are satisfied, the determination unit 14 determines that the dark lighting condition is satisfied. Further, the determination unit 14 determines that the dark lighting condition is not satisfied when any of the first to third conditions is not satisfied. The determination unit 14 sequentially determines the first to third conditions, and if it is determined that any of the conditions is not satisfied, the dark lighting determination may be interrupted at that point.

When the determination unit 14 determines that the dark lighting condition is satisfied, the light source control unit 11 lights the light source unit 2 in the dark lighting mode. The dark lighting mode is an operation mode in which the light source unit 2 is turned on (dark lighting) at a dimming level lower than that when all lights are turned on. Assuming that the dimming level of the light source unit 2 at the time of full lighting is 100%, the dimming level of the light source unit 2 at the time of dark lighting is set to a value of, for example, 30% or less. The dimming level of the light source unit 2 at the time of dark lighting is preferably a value such that the illuminance on the floor surface is 50 lpx or less.

Further, when the determination unit 14 determines that the dark lighting condition is not satisfied, the light source control unit 11 lights the light source unit 2 in the normal mode. That is, when the dark lighting condition is not satisfied, the light source control unit 11 lights the light source unit 2 in the lighting state (dimming level, toning level) before the extinguishing control is performed.

Further, in the dark lighting mode, the light source control unit 11 changes the dimming level of the light source unit 2 at the time of dark lighting according to the comparison result between the extinguishing time and the second threshold time in the first condition of the dark lighting condition. .. When the extinguishing time is less than the second threshold time, the light source control unit 11 turns on the light source unit 2 (first dark lighting) in the first dark lighting mode. When the extinguishing time is equal to or longer than the second threshold time, the light source control unit 11 turns on the light source unit 2 (second dark lighting) in the second dark lighting mode. The dimming level of the light source unit 2 (second dimming level) at the time of the second dark lighting is lower than the dimming level (first dimming level) of the light source unit 2 at the time of the first dark lighting. For example, the first dimming level is 30% and the second dimming level is 10%.

Further, in the dark lighting mode, the light source control unit 11 changes the toning level of the light source unit 2 at the time of dark lighting according to the comparison result between the extinguishing time and the second threshold time in the first condition of the dark lighting condition. .. The toning level (second toning level) of the light source unit 2 at the time of the second dark lighting is equal to or lower than the toning level (first toning level) of the light source unit 2 at the time of the first dark lighting. For example, the first toning level is the color temperature when the light source unit 2 is lit in the normal mode, and the second toning level is the lower limit of toning (for example, 3000K).

(2.2) Controller The lighting device 100 of the present embodiment includes a controller 4 for remote control by the user.

The controller 4 includes a plurality of buttons (see FIG. 3) that receive operations from the user, and a signal transmission unit 41 (see FIG. 1) that transmits a radio signal corresponding to the operated buttons. The radio signal is, for example, an infrared signal. The plurality of buttons are dark lighting button B1, lighting button B11, all lighting button B12, nightlight button B13, extinguishing button B14, dimming button B21, B22, toning button B23, B24, timer button B31, B32, setting button B33. , And the automatic mode button B34.

The dark button B1 is arranged at the upper part of the housing of the controller 4. The dark lighting button B1 has a rectangular shape in a plan view, and the characters "automatic" are written on it. The dark lighting button B1 is a button for transmitting a dark lighting signal. When the dark lighting button B1 is pressed, the signal transmission unit 41 transmits a dark lighting signal as a wireless signal. When the signal receiving unit 34 receives the dark lighting signal while the light source unit 2 is turned off, the trigger generating unit 13 generates a dark lighting trigger. Further, when the signal receiving unit 34 receives the dark lighting signal while the light source unit 2 is lit, the light source control unit 11 turns off the light source unit 2. That is, the dark lighting button B1 is a button that turns on and off the light source unit 2. The dark lighting button B1 is larger in size than the other buttons among the plurality of buttons. The size referred to here is the area of the button in the plan view of the controller 4. That is, the dark lighting button B1 has the largest exposed area from the housing of the controller 4 among the plurality of buttons. Therefore, the dark lighting button B1 is easily noticed by the user and is easy for the user to operate.

The lighting button B11 is arranged below the dark lighting button B1. The lighting button B11 has a circular shape in a plan view, and the character "ON" is written on it. The lighting button B11 is a button for transmitting a normal lighting signal. When the lighting button B11 is pressed, the signal transmitting unit 41 transmits a normal lighting signal as a wireless signal. When the signal receiving unit 34 receives the normal lighting signal, the light source control unit 11 lights the light source unit 2 at the set dimming level and toning level.

The dimming buttons B21 and B22 and the toning buttons B23 and B24 are arranged so as to surround the lighting button B11.

The dimming button B21 is arranged above the lighting button B11. The dimming button B21 is formed in a fan shape in a plan view, and the characters "bright" are written on it. The dimming button B21 is a button for transmitting a dimming level increase signal. When the dimming button B21 is pressed, the signal transmission unit 41 transmits a dimming level increase signal as a wireless signal. When the signal receiving unit 34 receives the dimming level increasing signal, the light source control unit 11 increases the dimming level of the light source unit 2 that is lit.

The dimming button B22 is arranged below the lighting button B11. The dimming button B22 is formed in a fan shape in a plan view, and the characters "dark" are written. The dimming button B22 is a button for transmitting a dimming level reduction signal. When the dimming button B21 is pressed, the signal transmission unit 41 transmits a dimming level reduction signal as a wireless signal. When the signal receiving unit 34 receives the dimming level reduction signal, the light source control unit 11 reduces the dimming level of the light source unit 2 that is lit.

Further, the dimming level after the change is stored (set) in the memory. The light source control unit 11 lights the light source unit 2 at the dimming level set in the memory when the lighting button B11 is pressed.

The toning button B23 is arranged to the left of the lighting button B11. The toning button B23 is formed in a fan shape in a plan view, and the characters "cold color" are written on it. The toning button B23 is a button for transmitting a toning level increase signal. When the toning button B23 is pressed, the signal transmission unit 41 transmits a toning level increasing signal as a wireless signal. When the signal receiving unit 34 receives the toning level increasing signal, the light source controlling unit 11 increases the toning level of the lighting light source unit 2.

The toning button B24 is arranged to the right of the lighting button B11. The toning button B24 is formed in a fan shape in a plan view, and the characters "warm color" are written on it. The toning button B24 is a button for transmitting a toning level reduction signal. When the toning button B24 is pressed, the signal transmission unit 41 transmits a toning level reduction signal as a wireless signal. When the signal receiving unit 34 receives the toning level reduction signal, the light source control unit 11 reduces the toning level of the light source unit 2 that is lit.

Further, the toning level after the change is stored (set) in the memory. When the lighting button B11 is pressed, the light source control unit 11 lights the light source unit 2 at the toning level set in the memory.

The full lighting button B12 is arranged below the dimming button B22 and the toning button B24. The all-lighting button B12 has a rectangular shape in a plan view, and the characters "all lights" are written on the button B12. The full lighting button B12 is a button for transmitting a full lighting signal. When the all-lighting button B12 is pressed, the signal transmission unit 41 transmits the all-lighting signal as a wireless signal. When the signal receiving unit 34 receives all the lighting signals, the light source control unit 11 turns on all the light source units 2.

The nightlight button B13 is arranged below the all-lighting button B12. The nightlight button B13 has a rectangular shape in a plan view, and the characters "nightlight" are written on it. The nightlight button B13 is a button for transmitting a nightlight signal. When the nightlight button B13 is pressed, the signal transmission unit 41 transmits a nightlight signal as a wireless signal. When the signal receiving unit 34 receives the nightlight signal, the light source control unit 11 turns off the light source unit 2 and turns on the auxiliary light source unit 20.

The extinguishing button B14 is arranged to the left of the all lighting button B12. The light-off button B14 has a rectangular shape in a plan view, and the characters "light-off" are written on the button B14. The extinguishing button B14 is a button for transmitting an extinguishing signal. When the light-off button B14 is pressed, the signal transmission unit 41 transmits a light-off signal as a wireless signal. When the signal receiving unit 34 receives the extinguishing signal, the light source control unit 11 turns off the light source unit 2 and the auxiliary light source unit 20.

The timer button B31 is arranged below the extinguishing button B14. The timer button B31 has a rectangular shape in a plan view, and the characters "ON timer" are written on the timer button B31. The timer button B31 is a button for transmitting an ON timer signal. When the timer button B31 is pressed, the signal transmission unit 41 transmits an ON timer signal as a wireless signal. When the signal receiving unit 34 receives the ON timer signal, the light source control unit 11 turns on the light source unit 2 after a set time. The set time is determined, for example, by the number of times the timer button B31 is pressed in a predetermined period.

The timer button B32 is arranged to the right of the timer button B31. The timer button B32 has a rectangular shape in a plan view, and the characters "OFF timer" are written on the timer button B32. The timer button B32 is a button for transmitting an OFF timer signal. When the timer button B32 is pressed, the signal transmission unit 41 transmits an OFF timer signal as a wireless signal. When the signal receiving unit 34 receives the OFF timer signal, the light source control unit 11 turns off the light source unit 2 after a set time. The set time is determined, for example, by the number of times the timer button B32 is pressed in a predetermined period.

The setting button B33 is arranged below the timer button B31. The setting button B33 has a rectangular shape in a plan view, and the characters "setting" are written on the setting button B33. The setting button B33 is a button for transmitting a setting mode signal. When the setting button B33 is pressed, the signal transmission unit 41 transmits a setting mode signal as a wireless signal. When the signal receiving unit 34 receives the setting mode signal, the light source control unit 11 shifts to the setting mode for performing various settings.

The automatic mode button B34 is arranged to the right of the setting button B33. The automatic mode button B34 has a rectangular shape in a plan view, and the characters "automatic mode" are written on the button B34. The automatic mode button B34 is a button for transmitting an automatic mode signal. When the automatic mode button B34 is pressed, the signal transmission unit 41 transmits an automatic mode signal as a wireless signal. When the signal receiving unit 34 receives the automatic mode signal, the light source control unit 11 turns on / off the execution of the automatic mode. Specifically, the light source control unit 11 stops the automatic mode when the signal receiving unit 34 receives the automatic mode signal during the execution of the automatic mode. The light source control unit 11 executes the automatic mode when the signal receiving unit 34 receives the automatic mode signal while the automatic mode is stopped. The automatic mode is a mode that allows operation in the dark lighting mode. That is, when the automatic mode is being executed, a dark lighting trigger is generated, and when the dark lighting condition is satisfied, the light source control unit 11 darkly lights the light source unit 2. Further, when the automatic mode is stopped, the generation of the dark lighting trigger in the trigger generation unit 13 is prohibited. As a result, when the automatic mode is stopped, the operation of the dark lighting mode is prohibited.

Even when the automatic mode is stopped, the trigger generation unit 13 may be configured to generate the dark lighting trigger only when the signal receiving unit 34 receives the dark lighting signal. In this case, if the dark lighting condition is satisfied, the light source control unit 11 executes the dark lighting mode to darken the light source unit 2. That is, when the user intentionally permits the execution of the dark lighting mode, the dark lighting mode can be executed regardless of whether the automatic mode is turned on or off.

(3) Operation Example An operation example of the lighting control system 1 of the present embodiment will be described below. In the operation example described below, it is assumed that the switch SW1 is in the ON state and the lighting control system 1 is being driven by the power supply from the power supply circuit 31.

(3.1) First Operation Example A first operation example of the lighting control system 1 will be described with reference to FIG. The first operation example is an operation example when the user wakes up.

First, the trigger generation unit 13 determines whether or not the light source unit 2 is off (S1). Specifically, the trigger generation unit 13 acquires the operating state of the light source control unit 11 and determines whether or not the light extinguishing control is in progress.

When the light source unit 2 is not turned off (S1: No), that is, when the light source unit 2 is fully lit or normally lit, the lit state of the light source unit 2 is maintained and the process ends.

When the light source unit 2 is off (S1: Yes), the trigger generation unit 13 determines whether or not the user has woken up (S2). The trigger generation unit 13 determines whether or not the user has woken up based on the detection result of the wake-up sensor 33.

When the user has not woken up (S2: No), the light source control unit 11 continues the extinguishing control and ends the process. The case where the user is not awake is a case where the wake-up sensor 33 does not detect the user's wake-up, for example, when the user is sleeping, the user is awake, or the user is absent. Is. Further, when the auxiliary light source unit 20 is turned on, the light source control unit 11 maintains the lighting state of the auxiliary light source.

When the user wakes up (S2: Yes), that is, when the wake-up sensor 33 detects that the user wakes up, the trigger generation unit 13 generates a dark lighting trigger. When the dark lighting trigger occurs, the determination unit 14 determines whether or not the dark lighting condition is satisfied. In this operation example, the determination unit 14 first determines whether or not the third condition is satisfied. That is, the determination unit 14 acquires the measurement result (brightness level around the light source unit 2) of the brightness sensor 35, and determines whether or not the measurement result is less than the threshold level (S3).

When the brightness level is equal to or higher than the threshold level (S3: No), the determination unit 14 determines that the third condition is not satisfied, that is, the dark lighting condition is not satisfied. In this case, the light source control unit 11 lights (normally lights) the light source unit 2 in the normal mode (S4). For example, when the user wakes up in the morning when the surroundings are bright, the light source control unit 11 normally lights the light source unit 2 at a relatively high dimming level. As a result, the user can be awakened.

If the brightness level is less than the threshold level (S3: Yes), the determination unit 14 determines that the third condition is satisfied. In this case, the determination unit 14 determines whether or not the second condition is satisfied. That is, the determination unit 14 acquires the date and time information from the clock unit 15 and determines whether or not the current time is within the dark lighting time zone (S5).

When the current time is outside the dark lighting time zone (S5: No), the determination unit 14 determines that the second condition is not satisfied, that is, the dark lighting condition is not satisfied. In this case, the light source control unit 11 lights (normally lights) the light source unit 2 in the normal mode (S4). For example, when the user wakes up at a time later than the scheduled wake-up time, the light source control unit 11 normally lights the light source unit 2 at a relatively high dimming level. As a result, the user can be awakened.

Further, when the current time is within the dark lighting time zone (S5: Yes), the determination unit 14 determines that the second condition is satisfied. In this case, the determination unit 14 determines whether or not the first condition is satisfied. That is, the determination unit 14 acquires the extinguishing time from the time measuring unit 12 and determines whether or not the extinguishing time is equal to or longer than the first threshold time (S6).

When the extinguishing time is less than the first threshold time (S6: No), the determination unit 14 determines that the first condition is not satisfied, that is, the dark lighting condition is not satisfied. In this case, the light source control unit 11 lights (normally lights) the light source unit 2 in the normal mode (S4). For example, when the user wakes up shortly after going to bed, the light source control unit 11 normally lights the light source unit 2 at a relatively high dimming level. As a result, for example, when the user is in a light adaptation state immediately after going to bed, the user is prevented from feeling the light of the light source unit 2 as dark.

Further, when the extinguishing time is equal to or longer than the first threshold time (S6: Yes), the determination unit 14 determines that the first condition is satisfied. Therefore, since the first to third conditions are satisfied, the determination unit 14 determines that the dark lighting determination is satisfied. The determination unit 14 further determines whether or not the extinguishing time is equal to or longer than the second threshold time (S7). The second threshold time is a time longer than the first threshold time.

When the extinguishing time is less than the second threshold time (S7: No), the light source control unit 11 darkly lights the light source unit 2 (first dark lighting) in the first dark lighting mode (S8). For example, when the user goes to bed and wakes up to go to the toilet after a while, the light source control unit 11 turns on the light source unit 2 in a dark light with a low dimming level. Therefore, even if the user is in a dark adaptation state, it is possible to prevent the user from feeling the light of the light source unit 2 dazzling. As a result, it is possible to prevent the user from awakening and having trouble falling asleep.

When the extinguishing time is equal to or longer than the second threshold time (S7: Yes), the light source control unit 11 darkly lights the light source unit 2 (second dark lighting) in the second dark lighting mode (S9). The second dimming level at the time of the second dark lighting is lower than the first dimming level at the time of the first dark lighting. Further, the second toning level at the time of the second dark lighting is lower than the second toning level at the time of the first dark lighting. As a result, the light source unit 2 can be turned on at a dimming level and a toning level according to the dark adaptation state of the user, and the user's awakening can be further suppressed. For example, when a long time has passed since the user went to bed and the user wakes up in a deep dark adaptation state, the dimming level is lower and the light source unit 2 lights up darkly, so that the user feels the light of the light source unit 2 dazzling. Is more suppressed. Further, in the second dark lighting, the color temperature of the light of the light source unit 2 is lower than that in the first dark lighting, so that the user's awakening can be further suppressed. As a result, it is possible to further prevent the user from falling asleep.

As described above, the lighting control method according to the present embodiment is a method of controlling the lighting state of the light source unit 2. The lighting control method includes a step of measuring the extinguishing time, which is the elapsed time from the extinguishing control of the light source unit 2. The lighting control method is that when a dark lighting trigger occurs, if the dark lighting conditions including the condition that the extinguishing time is equal to or longer than the threshold time are satisfied, the light source unit is in the dark lighting mode in which the dimming level is lower than that of all lighting. Turn on 2.

In the lighting control system 1 and the lighting control method of the present embodiment, the light source unit 2 is turned on in a lighting state according to the user's visual environment without switching the lighting mode, so that the user's comfort can be improved. it can.

(Second operation example)
A second operation example of the lighting control system 1 will be described with reference to FIG. The second operation example is an operation example when the user presses the dark lighting button B1 (see FIG. 3) of the controller 4. In the description of the second operation example, the description of the same control as that of the first operation example will be omitted as appropriate.

When the dark lighting button B1 of the controller 4 is pressed by the user, the signal transmission unit 41 transmits a dark lighting signal. The signal receiving unit 34 receives the dark lighting signal transmitted from the signal transmitting unit 41 (S11).

The trigger generation unit 13 and the light source control unit 11 determine whether or not the light source unit 2 is off (S12).

When the light source unit 2 is lit (S12: No), the trigger generation unit 13 does not generate a dark lighting trigger. Here, "the light source unit 2 is lit" means that the light source unit 2 is normally lit, fully lit, or dimly lit. When the light source unit 2 is lit, the light source control unit 11 turns off the lit light source unit 2 (S13).

Further, when the light source unit 2 is off (S12: Yes), the trigger generation unit 13 generates a dark lighting trigger. Similar to step S3 of the first operation example, the determination unit 14 acquires the measurement result (brightness level around the light source unit 2) of the brightness sensor 35 when the dark lighting trigger occurs, and the measurement result is the threshold value. It is determined whether or not the level is less than the level (S14).

When the brightness level is equal to or higher than the threshold level (S14: No), the determination unit 14 determines that the third condition is not satisfied, that is, the dark lighting condition is not satisfied. In this case, the light source control unit 11 lights (normally lights) the light source unit 2 in the normal mode (S15). As a result, for example, when the surroundings are bright and the user is in a light adaptation state, the user is prevented from feeling the light of the light source unit 2 as dark.

If the brightness level is less than the threshold level (S14: Yes), the determination unit 14 determines that the third condition is satisfied. In this case, as in step S5 of the first operation example, the determination unit 14 acquires the date and time information from the clock unit 15 and determines whether or not the current time is within the dark lighting time zone (S16).

When the current time is outside the dark lighting time zone (S16: No), the determination unit 14 determines that the second condition is not satisfied, that is, the dark lighting condition is not satisfied. In this case, the light source control unit 11 lights (normally lights) the light source unit 2 in the normal mode (S15). As a result, for example, when the user is awake outside the scheduled sleep time, the user is prevented from feeling the light of the light source unit 2 as dark.

Further, when the current time is within the dark lighting time zone (S16: Yes), the determination unit 14 determines that the second condition is satisfied. In this case, similarly to step S6 of the first operation example, the determination unit 14 acquires the extinguishing time from the time measuring unit 12 and determines whether or not the extinguishing time is equal to or longer than the first threshold time (S17).

When the extinguishing time is less than the first threshold time (S17: No), the determination unit 14 determines that the first condition is not satisfied, that is, the dark lighting condition is not satisfied. In this case, the light source control unit 11 lights (normally lights) the light source unit 2 in the normal mode (S15). For example, when the user turns off the light source unit 2 and then turns it on again in a short time, it is possible to prevent the user from feeling the light of the light source unit 2 as dark even in the light adaptation state.

Further, when the extinguishing time is equal to or longer than the first threshold time (S17: Yes), the determination unit 14 determines that the first condition is satisfied. Therefore, since the first to third conditions are satisfied, the determination unit 14 determines that the dark lighting determination is satisfied. The determination unit 14 further determines whether or not the extinguishing time is equal to or longer than the second threshold time (S18). The second threshold time is a time longer than the first threshold time.

When the extinguishing time is less than the second threshold time (S18: No), the light source control unit 11 darkly lights the light source unit 2 (first dark lighting) in the first dark lighting mode (S19). For example, when the user goes to bed and turns on the light source unit 2 to go to the toilet after a while, the light source control unit 11 turns on the light source unit 2 in a dark light with a low dimming level. Therefore, even if the user is in a dark adaptation state, it is possible to prevent the user from feeling the light of the light source unit 2 dazzling. As a result, it is possible to prevent the user from awakening and having trouble falling asleep.

When the extinguishing time is equal to or longer than the second threshold time (S18: Yes), the light source control unit 11 darkly lights the light source unit 2 (second dark lighting) in the second dark lighting mode (S20). As a result, the light source unit 2 can be turned on at a dimming level and a toning level according to the dark adaptation state of the user, and the user's awakening can be further suppressed. For example, when a long time has passed since the user went to bed and the user wakes up in a state of deep dark adaptation and lights the light source unit 2, the dimming level is lower and the light source unit 2 is dimly lit, so that the user can use the light source. It is more suppressed that the light of the part 2 is dazzling. Further, in the second dark lighting, the color temperature of the light of the light source unit 2 is lower than that in the first dark lighting, so that the user's awakening can be further suppressed. As a result, it is possible to further prevent the user from falling asleep.

(Modification example)
Hereinafter, a modified example of the lighting control system 1 of the present embodiment will be described. In the following description, the same components as those in the above-described embodiment will be designated by the same reference numerals, and the description thereof will be omitted as appropriate.

(First modification)
In the above-mentioned example, the lighting control system 1 is provided in the fixture main body 30 of the lighting device 100, but the present invention is not limited to this. In this modification, as shown in FIG. 6, the lighting control system 1 is provided in the server 50, and controls the light source unit 2 provided in the lighting device 100 via a communication line.

The server includes a lighting control system 1 and a communication unit 51. The communication unit 51 is a communication interface and is connected to the communication line NT1 (for example, an Internet line). The lighting device 100 of this modification includes a communication unit 36. The communication unit 36 is a communication interface and is connected to the communication line NT1 via a router, a gateway, or the like. The communication unit 51 and the communication unit 36 can perform bidirectional communication via the communication line NT1.

In this modification, the lighting control system 1 obtains the detection result of the wake-up sensor 33, the signal received by the signal receiving unit 34, the measurement result of the brightness sensor 35, and the like via the communication units 51 and 36 and the communication line NT1. It is configured to receive. Further, the light source control unit 11 controls the light source unit 2 and the auxiliary light source unit 20 by controlling the lighting circuit 32 via the communication units 51 and 36 and the communication line NT1.

Further, the lighting control system 1 of this modification is configured to be able to further communicate with the lighting devices 6A and 6B via the communication line NT1. The lighting control system 1 controls a light source unit 61A provided in the lighting device 6A and a light source unit 61B provided in the lighting device 6B. The lighting device 6A is provided, for example, in a corridor. The lighting device 6B is provided in, for example, a toilet.

When the light source unit 2 of the lighting device 100 is darkly lit, the light source control unit 11 also darkly lights the light source unit 61A of the lighting device 6A and the light source unit 61B of the lighting device 6B. For example, when the user wakes up at midnight and goes to the toilet, not only the light source unit 2 in the bedroom but also the light source unit 61A in the corridor and the light source unit 61B in the toilet are dimly lit. As a result, it is suppressed that the user feels the light of the light source portion 61A in the corridor and the light source portion 61B of the toilet dazzling, and it is suppressed that the user is awake and has trouble falling asleep.

The lighting control system 1 may be configured to control a plurality of light source units via a LAN (Local Area Network) constructed in the building. In this case, the lighting control system 1 may be provided in the lighting device 100 and configured to control the light source unit of another lighting device 100.

(Other variants)
Hereinafter, other modifications of the lighting control system 1 will be listed. The modifications described below can be applied in combination with the above-described embodiments and the first modifications as appropriate.

In the above-mentioned example, the dark lighting condition includes the first to third conditions, but at least the first condition may be included. For example, the dark lighting condition may be only the first condition, or may be the first condition and the second condition or the third condition. Further, the dark lighting condition may include a condition different from the first to third conditions.

In the above-described example, in the second dark lighting, the color temperature of the light of the light source unit 2 is reduced as compared with the first dark lighting, but the same may be applied.

In the above-mentioned example, the dark lighting time zone is set by the time zone setting unit 16, but the user may be configured to be able to set an arbitrary time zone.

In the above-mentioned example, the brightness sensor 35 and the wake-up sensor 33 are provided in the fixture main body 30 of the lighting device 100, but may be provided separately from the fixture main body 30. In this case, the brightness sensor 35 and the wake-up sensor 33 transmit the detection result to the lighting control system 1 by wire communication or wireless communication.

In the above-mentioned example, the wake-up sensor 33 is a microwave sensor, but the wake-up sensor 33 is not limited to this.

For example, the wake-up sensor 33 may be an infrared sensor. In this case, the wake-up sensor 33 detects the user's wake-up by detecting the presence of a person in the detection range based on the change in the light receiving intensity of infrared rays from the detection range.

Further, the wake-up sensor 33 may be an image sensor. In this case, the wake-up sensor 33 includes a camera and an image processing unit, and the image processing unit detects the user's wake-up by processing the image captured by the camera.

Further, the wake-up sensor 33 may be a pressure sensor. In this case, the wake-up sensor 33 is arranged under the pillow, for example, and detects the user's wake-up by detecting the pressure drop when the user wakes up and raises the upper body. Alternatively, the wake-up sensor 33 is arranged on the side of the bed, for example, and detects the user's wake-up by detecting the pressure increase when the user wakes up and gets out of the bed.

Further, the wake-up sensor 33 may be an acceleration sensor or a gyro sensor. In this case, the wake-up sensor 33 is attached to the user's body (for example, a wrist) and detects the user's wake-up by detecting the user's movement.

1 Lighting control system 11 Light source control unit 12 Hours measurement unit 13 Trigger generation unit 14 Judgment unit 16 Time zone setting unit 2 Light source unit 30 Instrument body 33 Wake-up sensor 34 Signal receiver 4 Controller 100 Lighting device B1 Dark lighting button

Claims (11)

A light source control unit that controls the light source unit and
A time measuring unit that measures the extinguishing time, which is the elapsed time since the light source unit was controlled to be extinguished,
A trigger generator that generates a dimly lit trigger,
When the dark lighting trigger occurs, a determination unit for determining whether or not the dark lighting condition is satisfied is provided.
The dark lighting condition includes a condition that the extinguishing time is equal to or longer than the threshold time.
When the dark lighting condition is satisfied, the light source control unit lights the light source unit in a dark lighting mode in which the dimming level is lower than that in the all lighting mode.
Lighting control system. The dark lighting condition further includes the condition that the current time is within the dark lighting time zone.
The lighting control system according to claim 1. A time zone setting unit for setting the dark lighting time zone is further provided based on the history of the extinguishing time.
The lighting control system according to claim 2. The dark lighting condition further includes a condition that the brightness level around the light source unit is less than the threshold level.
The lighting control system according to any one of claims 1 to 3. The trigger generating unit generates the dark lighting trigger when the wake-up sensor detects that the user has woken up.
The lighting control system according to any one of claims 1 to 4. When the signal receiving unit receives a dark lighting signal from the controller, the trigger generating unit generates the dark lighting trigger.
The lighting control system according to any one of claims 1 to 5. When the light source control unit is supplied with electric power and started, the light source unit is turned on in the lighting state before the stop.
The lighting control system according to any one of claims 1 to 6. The lighting control system according to any one of claims 1 to 7.
With the light source unit
A fixture body that supports the light source unit, and the like.
Lighting device. A wake-up sensor provided on the instrument body to detect the wake-up of the user is further provided.
The lighting device according to claim 8. Further equipped with a controller having multiple buttons, including a dark button for transmitting a dark signal,
Of the plurality of buttons, the dimly lit button is larger in size than the other buttons.
The lighting device according to claim 8 or 9. It is a lighting control method that controls the lighting state of the light source unit.
It has a step of measuring the extinguishing time, which is the elapsed time since the extinguishing control of the light source unit is performed.
When the dark lighting trigger occurs, if the dark lighting condition including the condition that the extinguishing time is equal to or longer than the threshold time is satisfied, the light source unit is turned on in the dark lighting mode in which the dimming level is lower than that of all lighting. ,
Lighting control method.

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