JP7315172B2 - Lighting system and lighting method - Google Patents

Description

The present invention relates to lighting systems and lighting methods.

For example, as disclosed in Patent Document 1, there is known a lighting system that selectively uses high color temperature light and low color temperature light for lighting a living space in accordance with human biorhythm. The lighting system of Patent Document 1 illuminates with low color temperature light with a color temperature of about 3000K during the calm period of the human biorhythm, and illuminates with high color temperature light with a color temperature of about 6500K during the active period. Further, the lighting system of Patent Literature 1 is configured such that the activation period and the calming period can be arbitrarily set by the user.

JP-A-2000-294388

By the way, the lighting system of Patent Literature 1 does not consider enhancement of wakefulness when waking up. A comfortable living space cannot be realized unless the user wakes up with a high arousal effect.

A lighting system for solving the above-described problems is provided with a partial lighting device installed in a building material forming a living space including a sleeping area to indirectly illuminate a head area of the sleeping area, and a control device for controlling a dimming rate of the partial lighting device. do. As a result, the illuminance of the head region gradually increases toward the wake-up time, thereby enhancing the wake-up effect of the user at the time of wake-up.

In the lighting system described above, it is preferable that the partial lighting device is installed on a building material forming a ceiling of the living space. Thereby, the illuminance in the head area can be effectively increased.

In the above lighting system, it is preferable that the partial lighting device is installed above the sleeping area. Thereby, the illuminance in the head area can be further effectively increased.

In the lighting system described above, it is preferable that the partial lighting device is installed at a position closer to the head region in the length direction of the sleeping area and shifted from the center of the sleeping area in the width direction. This prevents the partial illumination device from directly illuminating the head region.

In the wake-up control, the control device may increase the illuminance of the head area at a constant rising speed. In this way, the illuminance of the head region can be increased at a constant rising speed.
In the lighting system described above, it is preferable that the control device includes an input unit through which the user inputs the wake-up time. This allows the user to freely set the wake-up time.

In the above lighting system, it is preferable that the partial lighting device is a first partial lighting device, further comprising a second partial lighting device that is provided at a position different from the first partial lighting device and that illuminates a foot region of the sleeping area, and the control device performs sleep onset control that controls a dimming rate of the second partial lighting device so as to gradually decrease the illuminance of the foot region based on the second partial lighting device.

According to this configuration, the sleep onset control of the second partial lighting device can smoothly guide the user into a sleep state, so that the wake-up control of the first partial lighting device can effectively enhance the awakening effect of the user.

1 is a diagram showing a schematic configuration of an embodiment of a lighting system; FIG. FIG. 2 is a plan view showing an example of installation positions of a first partial lighting device and a second partial lighting device in a plan view of a passenger room from above; FIG. 2 is a functional block diagram showing an example of the electrical configuration of the lighting system; A graph showing an example of a wake-up schedule by illuminance changes in the head area. A graph showing an example of a sleep onset schedule with changes in illuminance in the foot area.

One embodiment of a lighting system is described with reference to FIGS. 1-5.
As shown in FIG. 1, the lighting system 10 is a lighting system that illuminates a guest room 11 of a sleeping facility such as a hotel. The guest room 11 has a living space 15 formed by a floor 12 , a plurality of walls 13 and a ceiling 14 . The guest room 11 is provided with a bed 16 forming a sleeping area in which the user of the guest room 11 sleeps. The bed 16 is a so-called single bed for one person. The sleeping area of the bed 16 is virtually divided into three areas, a head area 16H, a body area 16B, and a foot area 16L, arranged in the longitudinal direction of the bed 16 in a plan view of the cabin 11 from above.

The head region 16H is a region including one end of the bed 16 in the length direction. The head region 16H is a region in which the pillow 17 is placed and in which the user's head is placed during sleep. The body region 16B is a region adjacent to the head region 16H, and is a region where the body of the user is placed during sleep. The foot area 16L is an area other than the head area 16H and the body area 16B and includes the other end of the bed 16 in the longitudinal direction. The foot region 16L is a region adjacent to the body region 16B on the opposite side of the head region 16H, and is a region where the user's feet are placed during sleep.

The bed 16 has a length of approximately 2000 mm and a width of approximately 1000 mm. The head region 16H is, for example, a region extending from the head-side end to 450 mm in the length direction of the bed 16 . The body region 16B is, for example, a region having a length of 1000 mm in the longitudinal direction of the bed 16. As shown in FIG.

The lighting system 10 comprises a main lighting device 20 , a first partial lighting device 21 and a second partial lighting device 22 . Various numerical values relating to the first partial lighting device 21 and the second partial lighting device 22 illustrated below are values set based on the results of experiments conducted in advance. In this experiment, a plurality of subjects who are considered to have a well-established body rhythm were asked to sleep and wake up in the guest room 11 under various lighting conditions, and physiological and psychological indicators were evaluated. Then, based on the evaluation results, various numerical values were set so that the user's awakening effect increases when waking up and the user's falling asleep effect increases when going to bed.

The main lighting device 20 has a light source such as a light-emitting diode or an incandescent bulb, and is embedded in the ceiling 14 by being integrally attached to the building material forming the ceiling 14 . The main lighting device 20 is a lighting device that directly illuminates the entire living space 15 . The main lighting device 20 is turned on/off based on the user's operation on the control device 30, which will be described later.

The first partial lighting device 21 and the second partial lighting device 22 have light sources such as light-emitting diodes and incandescent bulbs, and are embedded in the ceiling 14 by being integrally attached to the building material forming the ceiling 14. The lighting direction of the first partial lighting device 21 and the second partial lighting device 22 is set directly downward, and the lighting device indirectly illuminates the head area 16</b>H of the bed 16 . The term "indirect illumination" as used herein means that the head region 16H of the bed 16 is illuminated not by the light emitted by the light source directly illuminating the head region 16H, but by diffused light or reflected light of the light emitted by the light source. A pair of first partial lighting devices 21 are installed on the ceiling 14 in FIG. In this embodiment, a single room in which one bed 16 is arranged is assumed, but the first partial lighting device 21 installed on the front side is a lighting device used in a twin room in which another bed 16 is installed so as to be adjacent to the bed 16.

The first partial lighting device 21 and the second partial lighting device 22 are lighting devices having a lower color temperature than the main lighting device 20 . The first partial lighting device 21 and the second partial lighting device 22 are lighting devices with a relatively low color temperature, for example a color temperature of 2800K±200K. By setting the color temperature of the first partial lighting device 21 and the second partial lighting device 22 to 2800 K±200 K, the eyelid transmittance of indirect light from the first partial lighting device 21 and the second partial lighting device 22 can be increased. The first partial lighting device 21 and the second partial lighting device 22 may be lighting devices having the same color temperature, or may be lighting devices having different color temperatures.

The first partial lighting device 21 and the second partial lighting device 22 are configured to be individually controllable by a control device 30, which will be described later, in lighting, extinguishing, and dimming rate. For example, the first partial lighting device 21 automatically lights up a predetermined start time before the wake-up time set by the user by the wake-up control executed by the control device 30, starts increasing the illuminance of the head region 16H, and increases the illuminance of the head region 16H so as to reach the first maximum illuminance E1 at the wake-up time. Further, for example, the second partial lighting device 22 starts reducing the illuminance of the head region 16H by the user's start operation of the sleep onset control by the sleep onset control executed by the control device 30, and automatically turns off after a predetermined turn off time.

As shown in FIG. 2 , the main lighting device 20 is installed in the central portion of the living space 15 . The first partial lighting device 21 and the second partial lighting device 22 are installed above the bed 16 .

The first partial lighting device 21 is installed above the body region 16B of the bed 16 . The first partial lighting device 21 is installed at a position closer to the head region 16</b>H in the length direction of the bed 16 . The first partial lighting device 21 is installed at a position in the width direction of the bed 16 shifted from a center imaginary line 24 indicating the center in the width direction. The first partial illumination device 21 indirectly illuminates the head region 16H with an illuminance (horizontal plane illuminance) equal to or less than the first maximum illuminance E1.

For example, the first partial lighting device 21 is set such that the distance L11 from the head-side end of the bed 16 to the installation position is 790 mm±100 mm. By setting the distance L11 to 690 mm or more, the maximum illuminance area based on the illumination of the first partial illumination device 21 can be set to an area different from the head region 16H, and the light source of the first partial illumination device 21 can be made difficult to see from the head region 16H. By setting the distance L11 to 890 mm or less, indirect illumination of the head region 16H by the first partial illumination device 21 can be effectively performed.

For example, the first partial lighting device 21 has a distance L12 of 400 mm±100 mm from the center imaginary line 24 to the installation position in the range above the body region 16B. By setting the distance L12 to 300 mm or more, the light source of the first partial lighting device 21 can be made difficult to see from the head region 16H. By setting the distance L12 to 500 mm or less, indirect illumination of the head region 16H by the first partial illumination device 21 can be effectively performed.

For example, the first maximum illuminance E1 is set to 380 lux±20 lux. Setting the first maximum illuminance E1 to 360 lux or more makes it easier for the user to feel that the illuminance of the head region 16H has increased due to wake-up control. By setting the first maximum illuminance E1 to 400 lux or less, the user can feel moderate glare at the end of wake-up control.

The second partial lighting device 22 is installed above the foot region 16L of the bed 16 . The second partial lighting device 22 is installed at a position overlapping the central virtual line 24 of the bed 16 in the plan view of the guest room 11 from above. The second partial illumination device 22 indirectly illuminates the head region 16H by illuminating the leg region 16L with an illuminance (horizontal plane illuminance) equal to or lower than the second maximum illuminance E2. The second maximum illuminance E2 is set to a value smaller than the first maximum illuminance E1.

For example, the second partial lighting device 22 is set such that the distance L21 from the head-side end of the bed 16 is 1705 mm±100 mm. By setting the distance L21 to 1605 mm or more, the light source of the first partial lighting device 21 can be made difficult to see from the head region 16H. By setting the distance L21 to 1805 mm or less, the head region 16H can be adequately illuminated indirectly by the second partial illumination device 22 .

For example, the second maximum illuminance E2 is set to 100 lux±10 lux. Setting the second maximum illuminance E2 to 90 lux or more makes it easier for the user to feel that the illuminance of the head region 16H has decreased due to sleep onset control. By setting the second maximum illuminance E2 to 110 lux or less, it is possible to suppress the glare felt by the user at the start of sleep onset control.

As shown in FIG. 3, the lighting system 10 includes a control device 30 capable of individually controlling the lighting and extinguishing of the main lighting device 20, the first partial lighting device 21, and the second partial lighting device 22.

The control device 30 has an input section 31 and a control section 35 that can communicate with each other. The input unit 31 has an operation unit 32 that can be operated by the user, and a display unit 33 that displays various information to the user. The input unit 31 outputs an operation signal to the control unit 35 according to the operation of the operation unit 32 . The display unit 33 displays various information based on the output signal output by the control unit 35 .

The user turns on and off the main lighting device 20 through the input unit 31 . The user sets the lighting operation, the lighting-out operation, and the wake-up control for the first partial lighting device 21 through the input unit 31 . For the second partial lighting device 22 , the user sets the lighting operation, the lighting-out operation, and the sleep onset control through the input unit 31 .

The control unit 35 acquires an operation signal input from the input unit 31, and executes various processes based on the acquired operation signal, programs and various data stored in the memory. The control unit 35 can be configured as a circuit including one or more dedicated hardware circuits such as ASIC, one or more processors that operate according to a computer program (software), or a combination thereof. A processor includes a CPU and memory, such as RAM and ROM, which stores program code or instructions configured to cause the CPU to perform processes. Memory or computer-readable media includes any available media that can be accessed by a general purpose or special purpose computer.

The control unit 35 has a clock unit 36, a main lighting control unit 37, a first lighting control unit 38, a second lighting control unit 39, a setting unit 40, and a lighting scheduling unit 41 as functional units that function by executing various programs.

The clock unit 36 grasps the current time, outputs the grasped current time to the input unit 31 and displays it on the display unit 33 .
The main lighting control section 37 turns on and off the main lighting device 20 based on the operation signal from the input section 31 .

The first lighting control unit 38 controls lighting, extinguishing, and dimming rate of the first partial lighting device 21 based on the operation signal from the input unit 31 . The first lighting control unit 38 performs wake-up control by the first partial lighting device 21 based on the current time grasped by the clock unit 36 and the like. The wake-up control is a control to start increasing the illuminance of the head region 16H by the start time before the wake-up time set by the user while keeping the main lighting device 20 and the second partial lighting device 22 turned off, and to increase the illuminance of the head region 16H so as to reach the first maximum illuminance E1 at the wake-up time. At this time, the first lighting control unit 38 increases the dimming rate of the first partial lighting device 21 according to the lighting schedule.

The second illumination control unit 39 controls the lighting, extinguishing, and dimming rate of the second partial lighting device 22 based on the operation signal from the input unit 31 , and performs sleep onset control by the second partial lighting device 22 . The sleep onset control is control in which the user turns off the main lighting device 20 and the first partial lighting device 21, starts reducing the illuminance of the head region 16H, and turns off the second partial lighting device 22 after the turning off time. At this time, the second lighting control unit 39 reduces the dimming rate of the second partial lighting device 22 according to the lighting schedule.

The setting unit 40 displays a wake-up control setting screen on the display unit 33 based on the operation signal from the input unit 31 . The setting unit 40 sets whether or not to execute the wake-up control and the wake-up time based on the user's operation on the wake-up control setting screen.

The setting unit 40 displays a setting screen for falling asleep control on the display unit 33 based on the operation of the operation unit 32 by the user. The setting unit 40 sets whether or not to perform the sleep onset control based on the user's operation on the setting screen for the sleep onset control.

The lighting schedule unit 41 holds a wake-up schedule, which is a lighting schedule for wake-up control, and a sleep schedule, which is a lighting schedule for sleep control.
As shown in FIG. 4, the wake-up schedule 42 is a lighting schedule that monotonically increases the illuminance of the head region 16H at a constant rising speed from before the start time (15 minutes before) the wake-up time so that the illuminance of the head region 16H reaches the first maximum illuminance E1 (for example, 380 lux) at the wake-up time “0”. It should be noted that the wake-up schedule is preferably configured so that the total amount of exposure is a predetermined value.

As shown in FIG. 5, the sleep onset schedule 44 halves the illuminance of the foot region 16L from the second maximum illuminance E2 (for example, 100 lux) at the start of sleep onset control, and then lowers the illuminance on the foot region 16L at a constant rate of decrease. Then, the lighting schedule is such that the second partial lighting device 22 is automatically turned off after the turn-off time.

(Operation of lighting system 10)
The operation of the lighting system 10 described above will be described.
Before going to bed, the user of the guest room 11 operates the input unit 31 of the control device 30 to set the execution of the sleep onset control, the execution of the wake-up control, and the wake-up time. The user operates the input unit 31 at bedtime to start sleep onset control.

The control device 30 turns off the main lighting device 20 and the first partial lighting device 21 by the start operation of the sleep onset control, gradually lowers the dimming rate of the second partial lighting device 22 according to the sleep onset schedule, and automatically turns off the second partial lighting device 22 after the turning off time.

Eventually, when the current time grasped by the clock part 36 is earlier than the wake-up time by the start time, the control device 30 keeps the main lighting device 20 and the second partial lighting device 22 in the off state, turns on the first partial lighting device 21, and increases the dimming rate of the first partial lighting device 21 according to the wake-up schedule.

(Action)
Since the illuminance of the foot region 16L gradually decreases from the second maximum illuminance E2 by executing the sleep onset control, the user can smoothly transition from the wakeful state to the sleep state. In addition, since the illuminance of the head region 16H gradually increases toward the first maximum illuminance E1 by executing the wake-up control, the user smoothly transitions from the sleeping state to the awake state. This enhances the wake-up effect of the user when waking up.

Effects of the present embodiment will be described.
(1) In the lighting system 10, the first partial lighting device 21 performs wake-up control. As a result, the surroundings of the user gradually become brighter toward the wake-up time, so that the wake-up effect of the user at the time of wake-up can be enhanced. A comfortable living space can be realized by waking up by an accurate awakening action.

(2) The first partial lighting device 21 is installed on the ceiling 14 . Thereby, the illuminance of the head region 16H can be effectively increased.
(3) The first partial lighting device 21 is embedded in the ceiling 14 by being integrally attached to the construction material forming the ceiling 14 . As a result, even in a compact guest room 11, a sense of openness given to the user and the design and uniformity of the guest room 11 can be improved, and the mentality of the guest room 11 can be improved because it does not interfere with the cleaning of the guest room 11 like a stand light or a standing lighting.

(4) The first partial lighting device 21 is installed above the bed 16 . Thereby, the illuminance of the head region 16H can be more effectively increased. As a result, it is possible to reduce power consumption during execution of the wake-up control.

(5) The first partial lighting device 21 is installed at a position closer to the head region 16H in the length direction of the bed 16 and shifted from the center in the width direction of the bed 16 . This prevents the first partial lighting device 21 from directly illuminating the head region 16H.

(6) The control device 30 is configured to be able to increase the illuminance of the head region 16H at a constant rate of increase during wake-up control. As a result, it is possible to more effectively enhance the awakening effect of the user when waking up.

(7) Wake-up control is configured so that the user himself/herself can set the wake-up time by operating the input unit 31 . As a result, the user can freely set the optimal wake-up time for his or her life rhythm.

(8) The lighting system 10 has the second partial lighting device 22 and is configured to be able to perform sleep onset control by the second partial lighting device 22 . As a result, the sleep onset control makes it easier for the user to fall asleep, so that the user's awakening effect by the wakeup control can be more effectively enhanced.

(9) The lighting system 10 separately includes a first partial lighting device 21 that executes wake-up control and a second partial lighting device 22 that executes sleep onset control. As a result, compared to the case where wake-up control and sleep onset control are realized by one partial lighting device, it is possible to easily deal with different conditions suitable for wake-up control and sleep onset control, such as changes in color temperature and dimming rate. In addition, since wake-up control and sleep onset control can be realized under a simple control method, the cost of the lighting system 10 can be reduced and robustness can be enhanced.

This embodiment can be implemented with the following modifications. This embodiment and the following modified examples can be implemented in combination with each other within a technically consistent range.
- The second partial lighting device 22 may be any lighting device that indirectly illuminates the head region 16H. Therefore, the installation position of the second partial lighting device 22 is not limited to above the bed 16 when installed on the ceiling 14 . Also, the second partial lighting device 22 may be installed on the floor 12 or the wall 13 .

- Falling asleep control may be performed by a plurality of second partial lighting devices 22 . In this case, the second lighting control unit 39 controls the dimming rate of the plurality of second partial lighting devices 22 so that the illuminance of the leg region 16L is gradually lowered.

- The illumination system 10 may not include the second partial illumination device 22 . In this case, the sleep onset control may be performed by the first partial lighting device 21, or the sleep onset control may not be performed.

- In the wake-up control, the control device 30 may increase the dimming rate of the first partial lighting device 21 so that the illuminance of the head region 16H reaches the first maximum illuminance E1 at the wake-up time. Therefore, the control device 30 may control the dimming rate of the first partial lighting device 21 so that the illuminance of the head region 16H is temporarily held at a constant value. In this case, the control device 30 may, for example, hold a wake-up schedule in which the illuminance of the head region 16H is temporarily held at a constant value in the illumination scheduler 41, and may control the dimming rate of the first partial illumination device 21 based on the wake-up schedule.

- In wake-up control, the control device 30 may control the dimming rate of the first partial lighting device 21 based on the measured value of the illuminance of the head region 16H. In this case, lighting system 10 has a meter (not shown) that measures the illumination of head region 16H. The control device 30 controls the dimming rate of the first partial illumination device 21 so that the measured value of the measuring device monotonically increases toward the first maximum illuminance E1.

- The first partial lighting device 21 may be any lighting device that indirectly illuminates the head region 16H. Therefore, the installation position of the first partial lighting device 21 is not limited to above the bed 16 when installed on the ceiling 14 . For example, wake-up control may be performed by the first partial lighting device 21 positioned on the near side shown in FIG. Also, the first partial lighting device 21 may be installed on the floor 12 or the wall 13 . Also, wake-up control may be performed by a plurality of first partial lighting devices 21 .

- The control device 30 may be configured to automatically set the wake-up time based on, for example, the user's check-in time and scheduled check-out time input by a hotel employee. In this case, the control device 30 acquires, for example, the check-in time and the scheduled check-out time from an accommodation management server (not shown), and sets the wake-up time based on the acquired time.

- The control device 30 may be configured to acquire the room entry time of the user based on the locking/unlocking of the guest room 11 and set the wake-up time based on the acquired room entry time.
- The control device 30 may be configured to be able to adjust the first maximum illuminance E1 of the head region 16H based on the wake-up time period. For example, the control device 30 may increase the first maximum illuminance E1 when the set wake-up time is in the middle of the night.

- The lighting system 10 may be installed in a sleeping facility having a living space 15 including a sleeping area of the user. Therefore, the lighting system 10 may be installed in a user's home, an apartment complex, or a simple accommodation facility.

DESCRIPTION OF SYMBOLS 10... Lighting system, 14... Ceiling, 15... Living space, 16... Bed, 16H... Head area, 16L... Foot area, 20... Main illumination device, 21... First partial illumination device, 22... Second partial illumination device, 30... Control device, 31... Input unit.

Claims (8)

a partial lighting device installed in a building material forming a living space including a sleeping area to indirectly illuminate a head area of the sleeping area;
a control device that controls the dimming rate of the partial lighting device,
The partial lighting device is
Light having a color temperature of 2800 K ± 200 K is placed above the sleeping area at a position close to the head area in the length direction of the sleeping area with respect to the building material forming the ceiling of the living space, which is 790 mm ± 100 mm away from the head side end of the sleeping area in the length direction of the sleeping area and is shifted 400 mm ± 100 mm in the width direction of the sleeping area from the center position of the sleeping area in the width direction of the sleeping area. indirectly illuminating the head region;
The control device is
A lighting system that starts increasing the illuminance of the head region by the partial lighting device a predetermined time before a wake-up time specified by a user, and increases the illuminance of the head region according to the elapsed time from the start of the illuminance increase. a first partial lighting device installed in a building material forming a living space including a sleeping area to indirectly illuminate a head area of the sleeping area;
a second partial lighting device provided at a position different from the first partial lighting device for illuminating a leg region of the sleeping area;
a control device for controlling a dimming rate of the first partial lighting device and a dimming rate of the second partial lighting device ;
The first partial lighting device,
It is installed at a position near the head region in the length direction of the sleeping region and offset from the center in the width direction of the sleeping region with respect to the building material forming the ceiling of the living space above the sleeping region, and indirectly illuminates the head region with light having a color temperature of 2800 K ± 200 K.
The control device is
Wake-up control for starting the illuminance increase of the head region by the first partial lighting device at a predetermined time before the wake-up time specified by the user, increasing the illuminance of the head region according to the elapsed time from the start of the illuminance increase, and falling asleep control for gradually decreasing the illuminance of the foot region based on the second partial lighting device are executed.
lighting system. The first partial lighting device,
In the length direction of the sleeping area, the distance from the head side end of the sleeping area to the installation position is set to 790 mm ± 100 mm,
3. The lighting system according to claim 2, wherein the distance from the central position of the sleeping area to the installation position is set to 400 mm±100 mm in the width direction of the sleeping area. The control device is
4. The lighting system according to claim 2 , wherein in the sleep onset control, the illuminance of the second partial lighting device is halved and then the illuminance of the leg area is gradually decreased. The lighting system according to any one of claims 1 to 4, wherein in the wake-up control, the control device increases the illuminance of the head area at a constant rising speed. The lighting system according to any one of claims 1 to 5 , wherein the control device includes an input unit for inputting the wake-up time by the user. A lighting method using a partial lighting device installed in a building material forming a living space including a sleeping area to indirectly illuminate a head area of the sleeping area,
The partial lighting device for indirectly illuminating the head region with light having a color temperature of 2800 K ± 200 K is positioned above the sleeping region with respect to the building material forming the ceiling of the living space at a position close to the head region in the length direction of the sleeping region, 790 mm ± 100 mm away from the head side end of the sleeping region in the length direction, and 4 in the width direction from the center position of the sleeping region in the width direction of the sleeping region. Installed at a position shifted by 00 mm ± 100 mm,
A lighting method in which a control device controls the dimming rate of the partial lighting device, the partial lighting device starts increasing the illuminance of the head region a predetermined time before a wake-up time designated by the user, and the illuminance of the head region increases according to the elapsed time from the start of the illuminance rising. A lighting method using a first partial lighting device installed in a building material forming a living space including a sleeping area to indirectly illuminate a head region of the sleeping area, and a second partial lighting device installed at a position different from the first partial lighting device to illuminate a foot region of the sleeping area,
The first partial lighting device that indirectly illuminates the head region with light having a color temperature of 2800 K ± 200 K is installed at a position near the head region in the length direction of the sleeping region and offset from the center in the width direction of the sleeping region with respect to building materials forming the ceiling of the living space above the sleeping region;
The control device is caused to control the dimming rate of the first partial lighting device and the dimming rate of the second partial lighting device , and the control device is caused to perform wake-up control to start increasing the illuminance of the head region by the first partial lighting device a predetermined time before a wake-up time specified by the user and increase the illuminance of the head region according to the elapsed time from the start of the illuminance increase, and sleep control to gradually decrease the illuminance of the foot region based on the second partial lighting device .
lighting method.