JP2021182566A - Lighting control system and lighting equipment - Google Patents

Abstract

To provide illumination taking an effect on a human body into consideration.SOLUTION: In a lighting control system in which lighting equipment and an information processing device are communicatively connected to each other, the lighting equipment includes a first light emitting device, a second light emitting device, and a light emission controller for controlling the irradiation ratio of light from the first light emitting device and light from the second light emitting device to irradiate illumination light, the information processing device includes a dimming management unit for transmitting a dimming instruction to change the irradiation ratio of the light from the first light emitting device and the light from the second light emitting device of the lighting equipment according to a time zone of the day, and the circadian characteristic of the illumination light is changed during a time zone in which the illumination light is irradiated, thereby executing lighting control taking the circadian rhythm into consideration.SELECTED DRAWING: Figure 2

Description

The present invention relates to a lighting control system and a lighting fixture.

Lighting has become an indispensable element in buildings such as offices, factories, commercial facilities, or homes. When a building that forms an indoor space is constructed, it is common to have lighting to illuminate the space.

Such interior lighting is usually intended to provide a comfortable interior for humans, except for some uses such as emergency lights. Therefore, one of the materials for judging the quality of indoor lighting is the element of color rendering. Patent Document 1 discloses a light emitting device having a high color rendering property having an average color rendering index of 90 or more.

On the other hand, in recent years, there has been a movement to emphasize considering the influence on the human body when forming a human working environment. One of them is, for example, a certification system called WELL certification (Well Building Standard) established by IWBI (International WELL Building Institute). WELL certification gives certification by evaluating buildings such as offices from multiple items such as air, water, food, light, and comfort, and meeting the criteria.

For example, regarding the light item in WELL certification, consideration for the visual environment, consideration for the circadian, consideration for the glare of equipment and sunlight are essential evaluation items, and color rendering is not essential and points are added. It is an item. As described above, the lighting that illuminates the indoor space in which a person works is required not only to have excellent color rendering properties but also to consider the influence of the human body.

JP-A-2018-129492

The purpose is to provide lighting that takes into consideration the effects on the human body.

In the lighting control system disclosed as one embodiment by the present specification, a lighting device and an information processing device are communicably connected, and the lighting device has a first light emitting device and a correlated color temperature of the first. It has a second light emitting device different from the light emitting device, and a light emitting control unit that controls the ratio of irradiating the light from the first light emitting device and the light from the second light emitting device to irradiate the illumination light. The information processing device transmits a dimming instruction and changes the irradiation ratio of the light from the first light emitting device of the lighting tool and the light from the second light emitting device according to the time zone of the day. The first light emitting device has a management unit, and the first light emitting device has a first point in which x is 0.280 and y is 0.070 in the chromaticity coordinates in the chromaticity diagram of the CIE1931 color system, and the chromaticity. The first straight line connecting the second point where x in the coordinates is 0.280 and y is 0.500, the second point, and x in the chromaticity coordinates are 0.013 and y is 0. A second straight line connecting a third point of 500, a pure purple locus extending from the first point to the smaller value of x in the chromaticity coordinates, and a pure purple locus extending from the third point in the chromaticity coordinates. It is a lighting control system that emits light having a melanopic ratio of 2.0 or more, which is light in a region defined by a spectral locus extending toward the smaller value of y.

Further, in the lighting control system disclosed as one embodiment by the present specification, the lighting fixture and the information processing device are communicably connected, and the lighting fixture has the correlation color temperature with the first light emitting device. It has a second light emitting device which is the same as the first light emitting device, and a light emitting control unit which controls the ratio of irradiating the light from the first light emitting device and the light from the second light emitting device to irradiate the illumination light. , The information processing apparatus transmits a dimming instruction, and changes the irradiation ratio of the light by the first light emitting device and the light by the second light emitting device of the lighting tool according to the time zone of the day. It has a dimming control unit, and the light emission control unit has a maximum and a minimum melanopic ratio of the illumination light in a time zone in which the illumination light is irradiated based on the dimming instruction. It is a lighting control system that is controlled so that the difference between the two is 0.01 or more.

Further, in the lighting control system disclosed as one embodiment by the present specification, the lighting fixture and the information processing apparatus are communicably connected, and the lighting fixture has the correlation color temperature with the first light emitting device. It has a second light emitting device different from the first light emitting device, and a light emitting control unit that controls the ratio of irradiating the light from the first light emitting device and the light from the second light emitting device to irradiate the illumination light. , The information processing apparatus transmits a dimming instruction, and changes the irradiation ratio of the light by the first light emitting device and the light by the second light emitting device of the lighting tool according to the time zone of the day. It has a dimming control unit, and the light emission control unit controls the illumination light in a range of at least a correlated color temperature of 3000K to 5000K based on the dimming instruction, and the melanopic ratio is maximum in the range. It is a lighting control system that is controlled so that the difference between the time when it becomes and the time when it becomes the minimum becomes 0.40 or more.

Further, in the lighting control system disclosed as one embodiment by the present specification, the lighting fixture and the information processing apparatus are communicably connected, and the lighting fixture has the correlation color temperature with the first light emitting device. It has a second light emitting device different from the first light emitting device, and a light emitting control unit that controls the ratio of irradiating the light from the first light emitting device and the light from the second light emitting device to irradiate the illumination light. , The information processing apparatus transmits a dimming instruction, and changes the irradiation ratio of the light by the first light emitting device and the light by the second light emitting device of the lighting tool according to the time zone of the day. It has a dimming control unit, and the light emission control unit controls the illumination light in a range of at least a correlated color temperature of 2700K to 6500K based on the dimming instruction, and the melanopic ratio is the maximum in the range. It is a lighting control system that is controlled so that the difference between when it becomes and when it becomes the minimum becomes 0.65 or more.

Further, the lighting fixture disclosed as one embodiment according to the present specification includes a first light emitting device, a second light emitting device having the same correlated color temperature as the first light emitting device, light from the first light emitting device, and the first light emitting device. It has a dimming control unit that controls the ratio of irradiating the light from the two light emitting devices and irradiates the illumination light, and has a melanopic ratio of the light from the first light emitting device and the light from the second light emitting device. The difference from the melanopic ratio is 0.05 or more.

Further, the lighting fixtures disclosed as one embodiment in the present specification include a first light emitting device, a second light emitting device having a correlated color temperature different from that of the first light emitting device, light from the first light emitting device, and the first light emitting device. It has a dimming control unit that controls the ratio of irradiating the light from the two light emitting devices and irradiates the illumination light, and has a melanopic ratio of the light from the first light emitting device and the light from the second light emitting device. The difference from the melanopic ratio is 0.7 or more.

According to the present invention, it is possible to provide lighting that takes into consideration the influence on the human body as compared with the conventional case.

FIG. 1 is a diagram showing curves of a circadian response and a luminosity factor response. FIG. 2 is a system configuration diagram showing an example of the lighting control system according to the first embodiment. FIG. 3 is a schematic view showing an example of the structure of the living room of the building according to the first embodiment. FIG. 4 is a block diagram for explaining the hardware configuration of the information processing apparatus. FIG. 5 is a block diagram for explaining a software configuration of the lighting control device according to the first embodiment. FIG. 6 is a schematic diagram for explaining the lighting device according to the first embodiment. FIG. 7 is a perspective view of a lighting fixture with a power adapter according to the first embodiment. FIG. 8 is a plan view for explaining a light emitting surface of the lighting fixture according to the first embodiment. FIG. 9 is a schematic configuration diagram of the light emitting device according to the first embodiment. FIG. 10A is an example of the emission spectrum of the light emitting device adopted in the lighting fixture according to the first embodiment. FIG. 10B is an example of the emission spectrum of the light emitting device adopted in the lighting fixture according to the first embodiment. FIG. 10C is an example of the emission spectrum of the light emitting device adopted in the lighting fixture according to the first embodiment. FIG. 10D is an example of the emission spectrum of the light emitting device adopted in the lighting fixture according to the first embodiment. FIG. 10E is an example of the emission spectrum of the light emitting device adopted in the lighting fixture according to the first embodiment. FIG. 11 is a flowchart showing the flow of lighting control executed by the lighting control system according to the first embodiment. FIG. 12 is a data configuration diagram showing an example of dimming setting information according to the first embodiment. FIG. 13A is a schematic diagram for explaining an example of the dimming rule according to the first embodiment. FIG. 13B is a schematic diagram for explaining an example of the dimming rule according to the first embodiment. FIG. 13C is a schematic diagram for explaining an example of the dimming rule according to the first embodiment. FIG. 13D is a schematic diagram for explaining an example of the dimming rule according to the first embodiment. FIG. 13E is a schematic diagram for explaining an example of the dimming rule according to the first embodiment. FIG. 14 is a schematic diagram for explaining the lighting device according to the second embodiment. FIG. 15 is a plan view for explaining a light emitting surface of the lighting fixture according to the second embodiment. FIG. 16 is a schematic configuration diagram of the third light emitting device according to the second embodiment. FIG. 17A is a schematic configuration diagram showing an example of a mode in which a plurality of light emitting devices according to an embodiment are included in one housing. FIG. 17B is a schematic configuration diagram showing another example of a mode in which a plurality of light emitting devices according to an embodiment are included in one housing. FIG. 17C is a schematic configuration diagram showing another example of a mode in which a plurality of light emitting devices according to an embodiment are included in one housing.

First, the effect of lighting on the human body will be described.
Taking the WELL certification mentioned in the background technology as an example, lighting design that considers circadians is required. In addition, consideration of circadian means consideration of circadian rhythm (circadian rhythm).

Human circadian rhythm is about 25 hours longer than one day, and if this is not adjusted to one day, that is, a 24-hour cycle, the rhythm cycle will be different from one day. Therefore, light plays an important role as a tuning factor for adjusting to 24 hours. By being exposed to the sun, the human body clock is adjusted to 24 hours, which naturally leads people to live in the rhythm of the day, such as waking up in the morning and going to bed at night.

In other words, the human body is equipped with a tuning function that uses light in order to live in a rhythm with a 24-hour cycle. Specifically, there is a very small area in the hypothalamus of the brain called the suprachiasmatic nucleus, which plays the role of the biological clock that controls circadian rhythm. Further, as a cell that gives an optical signal to the visceral cross-section nucleus, there is an endogenous light-sensitive retinal ganglion cell (hereinafter referred to as ipRGC) on the retina.

ipRGC contains a photoreceptive protein called melanopsin, which has been shown to be involved in the phototuning of circadian rhythms. Melanopsin has absorption characteristics depending on the wavelength of light, and its peak is in the vicinity of 480 nm to 490 nm.

Melanopsin is also considered to be involved in the secretion or suppression of melatonin, which is a sleep-promoting hormone. For example, it is considered that the secretion of melatonin is suppressed by increasing the amount of stimulation to ipRGC. Normally, the peak of melatonin secretion in the body comes at night, and the secretion of melatonin promotes sleep. Therefore, melatonin secretion is suppressed during the day.

In the above-mentioned WELL certification, Equivalent Melanopic Lux (hereinafter referred to as EML) is introduced in order to evaluate whether the lighting design is circadian-friendly. EML is calculated by the following formula (1).

ここで、Ｌｉｇｈｔは照明灯具による光の分光分布、Ｃｉｒｃａｄｉａｎは上述した４８０ｎｍ〜４９０ｎｍ付近にピークを有するメラノプシンの分光感度特性に基づくサーカディアン応答、Ｖｉｓｕａｌは視感度応答を示す。図１は、サーカディアン応答及び視感度応答の曲線を記した図である。 Further, the melanopic ratio (hereinafter referred to as MR) in the formula (1) is obtained by the following formula (2).

Here, Light indicates the spectral distribution of light by the lighting fixture, Circadian indicates the circadian response based on the spectral sensitivity characteristics of melanopsin having a peak in the vicinity of 480 nm to 490 nm described above, and Visual indicates the visual sensitivity response. FIG. 1 is a diagram showing curves of a circadian response and a luminosity factor response.

As can be seen from the equation (1), there are two possible directions for increasing the EML value: increasing the illuminance or increasing the MR. Moreover, it can be seen that the dependence on the characteristics of circadian rhythm is greater in MR than in illuminance. Therefore, in consideration of circadian rhythm, it is considered preferable to consider the value of MR. Further, based on the circadian response, the emission intensity in the wavelength range of about 470 nm to 490 nm is considered to be a wavelength band that particularly contributes to the control of melatonin secretion.

Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings. However, the embodiments shown below are for embodying the technical idea of the present invention and do not limit the present invention. Further, in the following description, members of the same or the same quality are shown with the same name and reference numeral, and detailed description thereof will be omitted as appropriate. In addition, the size and positional relationship of the members shown in each drawing may be exaggerated in order to clarify the explanation. Further, the relationship between the color name and the chromaticity coordinate, the relationship between the wavelength range of light and the color name of monochromatic light, and the like follow JIS Z8110.

<First Embodiment>
The lighting control system according to the first embodiment will be described. FIG. 2 is a system configuration diagram showing the system configuration of the lighting control system 100. Further, as a place where the lighting control by the lighting control system 100 is executed, the building 1 will be described as an example.

Building 1 is, for example, an office building in which employees of one or more companies work. The office building has a multi-story structure, and the example of FIG. 2 represents an N-story office building. In this building 1, a reception is provided on the first floor, and an elevator (elevator) can be used to move to a desired floor.

A plurality of living rooms are provided on the floors above the second floor, and the company can rent and use the desired living room 20. A plurality of living rooms 20 are provided on each floor, and for example, a living room number is attached as information for identifying each living room 20. In the example of FIG. 2, 201 and 202 are attached to the two living rooms 20 on the second floor, respectively, and N01 is attached to one living room 20 on the N floor as the living room numbers. As described above, as a typical form of a room number, a number indicating the number of floors is attached first, and then a number for individually identifying a room on the floor is attached.

FIG. 3 is a diagram showing an example of a living room 20 formed in the building 1. The living room 20 mainly forms a space surrounded by the ceiling 21, the floor 22, and the wall 23. Doors are provided on a part of the wall 23 for entering and exiting the living room, and windows that allow outside air and outside light to be taken in are provided in places. There may be a living room without windows. Further, a plurality of lighting devices 24 are attached to the ceiling 21 of the living room 20. In addition, air conditioning equipment is installed to control the temperature and humidity in the room.

When a company uses it, desks and chairs will be placed in this living space. A person (employee) who works in the living room 20 is exposed to the illumination light by the lighting device 24 while sitting on a chair and working at the desk. Therefore, the lighting device 24 is arranged so as to be illuminated with a certain illuminance suitable for the work. For example, when general office work is performed, the illumination light is irradiated so that the desk illuminance is 500 lpx or more, more preferably 750 lpx or more.

The standard of such illuminance also differs depending on the use of the building 1 and the work content performed therein. For example, the standards may differ depending on the general office, factory, school, or commercial facility. Furthermore, it may differ depending on the country. For example, Japan has a standard of JIS Z9110.

Therefore, the "illuminance above a certain level" required for the lighting device 24 provided on the ceiling 21 of the living room 20 is the purpose of the building 1, the work content performed there, and the national standard on which the building 1 is built. It is appropriately determined based on such factors. In that sense, the lighting control system 100 is a lighting control system that controls to irradiate illumination light having a certain illuminance or higher according to the work environment.

Further, in the office building, in addition to the living room 20 rented to the company, a management room 10 for managing the office building is provided. The management room 10 is provided with equipment for managing building equipment such as elevators, air conditioners, and lighting. Further, in the management room 10, a management terminal 11 and a lighting control device 12 are prepared. In the example of FIG. 2, the management room is provided on the top floor, but the floor on which the management room is provided may be arbitrarily determined.

The broken line in FIG. 2 represents the communication connection relationship. In other words, it means that the devices connected by the broken line are connected so as to be able to communicate with each other. The management terminal 11 and the plurality of lighting devices 24 are communicably connected to the lighting control device 12. The lighting control device 12 is communicably connected to the lighting device 24 to be controlled, and controls the lighting of the lighting device 24 via communication. Known wired or wireless communication means can be used for the communication connection. It should be noted that devices that are not connected by a broken line may be connected so as to be able to communicate with each other. Further, it may be connected to a device other than the device shown in FIG. 2 so as to be communicable.

The management terminal 11 and the lighting control device 12 can be configured by an information processing device such as a computer or a server device. FIG. 4 is a diagram showing an example of the hardware configuration of the information processing apparatus. In the information processing apparatus, the CPU 70, ROM 71, RAM 72, storage 73, graphics I / F74, data I / F75, communication I / F76, and input device 77 are connected to the bus.

The storage 73 is a storage medium capable of storing data non-volatilely. For example, a hard disk drive, a flash memory, or the like can be used. The CPU 70 is a processor that executes processing by using the RAM 72 as a work memory according to a program stored in the ROM 71 and the storage 73. The graphics I / F 74 is an interface that converts a generated display control signal into a signal that can be displayed by the apparatus and outputs the signal.

The data I / F75 is an interface for inputting data from the outside. For example, an interface such as USB can be applied. The communication I / F76 is an interface for communicating with a network using a predetermined protocol. The input device 77 receives the user input and outputs a predetermined control signal.

FIG. 5 is a functional block diagram illustrating information processing (function) executed by the lighting control device 12. The function represented by each functional block is realized, for example, by the CPU 70 executing a program. The lighting control device 12 has a dimming management unit 13, a dimming setting registration unit 14, and a dimming setting storage unit 15.

The dimming management unit 13 is a functional unit that manages a plurality of lighting devices 24 arranged in the living room 20 in the building 1 and controls the lighting by the lighting device 24. For example, the lighting of the living room 20 is controlled based on the setting related to the dimming control (dimming setting).

The dimming setting registration unit 14 is a functional unit for registering dimming settings. The dimming installation storage unit B5 is a functional unit that stores dimming setting information in which dimming settings are registered. For example, when the manager of the office building operates the management terminal 11 to input the dimming setting and requests the lighting control device 12 to register, the dimming setting registration unit 14 of the lighting control device 12 requests the registration. The dimming setting is registered in the dimming setting information of the dimming setting storage unit 15 according to the above.

The lighting device 24 includes a lighting fixture 30, a power adapter 50, and a dimming driver 60. FIG. 6 is a diagram showing an example of the configuration of the lighting device 24 and the connection between the lighting device 24 and the external device.

As shown in FIG. 6, in the lighting device 24, the lighting fixture 30 and the power adapter 50 are connected, and the power adapter 50 and the dimming driver 60 are connected. Further, the lighting fixture 30 and the power adapter 50 are connected by electrical wiring such as a DC harness. The power adapter 50 and the dimming driver 60 are connected by a communication wiring such as a communication cable. That is, the lighting fixture 30 and the power adapter 50 can be easily attached and detached by inserting and removing the electric wiring. Similarly, the power adapter 50 and the dimming driver 60 can be easily attached and detached by inserting and removing the communication wiring.

The power adapter 50 can be connected to the wiring passed through the ceiling of the building 1 and can receive power from an external power supply device. The dimming driver 60 is communicably connected to the lighting control device 12 by a wired or wireless communication means. The lighting fixture 30 and the power adapter 50 may be configured as an integrated device. Further, the power adapter 50 and the dimming driver 60 may be configured as an integrated device.

The power adapter 50 has a power supply unit 51 that supplies electric power from an external power supply device to the lighting fixture 30. For example, the power supply unit 51 converts AC power from an external power supply device into DC power and supplies it to the lighting fixture 30.

The dimming driver 60 has a dimming control unit 61 that adjusts the light emitted by the lighting fixture 30. In addition, a driver program for controlling the light from the lighting fixture 30 is installed. Therefore, the dimming driver 60 is provided with an information processing mechanism for executing the driver program. For example, it has a CPU, ROM, RAM, or the like. The dimming control unit 61 receives a dimming instruction, which is information for lighting control, from the lighting control device 12 connected communicably, and controls the light of the lighting fixture 30 based on the dimming instruction.

The lighting fixture 30 includes a base plate 31, a substrate 32, a plurality of light emitting devices 36, a light emitting control unit 35, a cover 33, and a fastener 34. Further, the plurality of light emitting devices 36 include one or more first light emitting devices 37 and one or more second light emitting devices 38. Further, the light emitting device 36 includes a light emitting element 39, a wavelength conversion member 40, and a molded body 42.

FIG. 7 is a perspective view of the lighting fixture 30 with the power adapter 50 attached, as viewed from the ceiling installation surface side of the lighting fixture 30. Further, FIG. 8 is a diagram showing a light emitting surface (a surface opposite to the ceiling installation surface) of the lighting fixture 30. Note that FIG. 8 shows a state in which the cover 33 of the lighting fixture 30 is removed. FIG. 9 is a schematic cross-sectional view showing a light emitting device 36 included in the lighting fixture 30.

In the lighting fixture 30, the substrate 32 is attached to the base plate 31. Further, a plurality of light emitting devices 36 are mounted on the substrate 32. The plurality of light emitting devices 36 are electrically connected through wiring, the light emitting device 36 is energized via the light emitting control unit 35, and the light emission by the light emitting device 36 is controlled.

Further, the cover 33 is attached to the base plate 31 so as to surround the plurality of light emitting devices 36 arranged on the substrate 32. Fasteners 34 are provided on the surface of the base plate 31 opposite to the surface on which the light emitting device 36 is arranged (ceiling installation surface). Further, the lighting fixture 30 and the power adapter 50 are connected on the ceiling installation surface side. The power adapter 50 is provided with a power supply terminal for connecting to the above-mentioned external power supply device and a dimming terminal for connecting to the dimming driver 60.

Further, in the lighting fixture 30, the first light emitting device 37 and the second light emitting device 38 are arranged alternately side by side. In the example of FIG. 8, a plurality of light emitting devices 36 are arranged in a matrix, and the first light emitting device 37 and the second light emitting device 38 are alternately arranged one column (or one row) at a time. It should be noted that they may be arranged alternately in units other than row or column units. For example, one unit of the light emitting device or a plurality of units may be arranged alternately.

The first light emitting device 37 and the second light emitting device 38 have different emission spectra. For example, it can be realized by changing the type and content of the phosphor 41 contained in the wavelength conversion member 40. Further, for example, it can be realized by using the light emitting element 39 in the first light emitting device 37 and the light emitting element 39 in the second light emitting device 38 as light emitting elements having different light emitting spectra. Both the light emitting element 39 and the phosphor 41 may be different.

In the lighting fixture 30, the light emission control unit 35 can control the light emission in the first light emitting device 37 and the light emission in the second light emitting device 38, respectively. For example, only one of the first light emitting device 37 and the second light emitting device 38 can emit light. Further, for example, the degree of light emission by the first light emitting device 37 or the second light emitting device 38 can be adjusted. The form of the lighting fixture 30 and the form of the light emitting device 36 are not limited to the examples shown in the figure, and known shapes, structures, and configurations can be used.

Here, the emission spectrum of the light emitting device 36 adopted in the lighting control system 100 of the first embodiment will be described. The lighting fixture 30 can be realized by selecting different emission spectra from the plurality of examples below for each of the first light emitting device 37 and the second light emitting device 38. It should be noted that the examples are some examples that can be adopted in the lighting fixture 30, and the application of the present invention is not necessarily limited to the light emitting device shown here.

<Example 1 of light emitting device>
The light emitting device 36 of Example 1 has a light emitting element 39 having a light emitting peak in the range of 410 nm or more and 490 nm or less, and in the wavelength conversion member 40, the formula (Y, Gd, Tb, Lu) ₃ (Al, Ga) ₅ O. ₁₂ : Contains a rare earth aluminate phosphor represented by Ce and a silicon nitride phosphor represented by _{the formula (Ca, Sr) AlSiN 3: Eu.} FIG. 10A shows a plurality of emission spectra in which the content of the phosphor 41 is adjusted and the chromaticity close to the blackbody radiation locus is changed, and the value of the correlated color temperature is changed. Further, in the light emitting device 36 of Example 1, a luminous efficiency in the range of 180 lm / W or more and 210 lm / W or less and an average color rendering index in the range of 80 or more and less than 90 are realized.

Here, the chromaticity close to the blackbody radiation locus means light having a color deviation duv from the blackbody radiation locus measured in accordance with JIS Z8725 within the range of −0.02 or more and 0.02 or less. It shall be. Further, in the present specification, in the formula showing the composition of the phosphor, the plurality of elements separated by commas (,) include at least one element among these plurality of elements in the composition. This means that two or more of the plurality of elements may be contained in combination. Further, in the present specification, in the formula showing the composition of the phosphor, the element before the colon (:) represents the element constituting the parent crystal and its molar ratio, and after the colon (:), the activating element is represented.

<Example 2 of light emitting device>
The light emitting device 36 of Example 2 has a light emitting element 39 having a light emitting peak in the range of 410 nm or more and 490 nm or less, and in the wavelength conversion member 40, the alkaline earth metal aluminum _{represented by the formula Sr 4 Al 14} O _{25: Eu.} Contains acid acid phosphors. FIG. 10B shows a plurality of emission spectra in which the content of the phosphor 41 is adjusted and the chromaticity close to the blackbody radiation locus is changed, and the value of the correlated color temperature is changed. Further, in the light emitting device 36 of Example 2, the luminous efficiency in the range of 170 lm / W or more and 195 lm / W or less and the average color rendering index in the range of 80 or more and 90 or less are realized.

<Example 3 of light emitting device>
The light emitting device 36 of Example 3 has a light emitting element 39 having a light emitting peak in the range of 410 nm or more and 490 nm or less, and in the wavelength conversion member 40, the formula (Ca, Sr, Ba) ₈ MgSi ₄ O ₁₆ (F, Cl, Br) ₂ : Contains a silicate phosphor represented by Eu. FIG. 10C shows a plurality of emission spectra in which the content of the phosphor 41 is adjusted and the chromaticity close to the blackbody radiation locus is changed, and the value of the correlated color temperature is changed. Further, in the light emitting device 36 of Example 3, the luminous efficiency in the range of 155 lm / W or more and 185 lm / W or less and the average color rendering index in the range of 90 or more and less than 95 are realized.

<Example 4 of light emitting device>
The light emitting device 36 of Example 4 has a light emitting element 39 having a light emitting peak in the range of 410 nm or more and 490 nm or less, and in the wavelength conversion member 40, the formula (Ca, Sr, Ba) ₅ (PO _{4 ) 3} (Cl, Br). ): an alkaline earth phosphate phosphor represented by Eu, Shii 3.5MgO _· 0.5MgF 2 _{· GeO} 2: containing a fluoro jar money preparative phosphor represented by Mn. FIG. 10D shows a plurality of emission spectra in which the content of the phosphor 41 is adjusted and the chromaticity close to the blackbody radiation locus is changed, and the value of the correlated color temperature is changed. Further, in the light emitting device 36 of Example 4, the luminous efficiency in the range of 115 lm / W or more and 140 lm / W or less and the average color rendering index in the range of 95 or more and less than 100 are realized.

<Example 5 of light emitting device>
The light emitting device 36 of Example 5 has a light emitting element 39 having a light emitting peak in the range of 410 nm or more and 490 nm or less, and in the wavelength conversion member 40, the alkaline earth metal aluminum _{represented by the formula Sr 4 Al 14} O _{25: Eu.} Contains acid acid phosphors. FIG. 10E shows the emission spectrum of the light emitting device 36 of Example 5. The light emitting device 36 of Example 5 is a light emitting device having an increased emission intensity in the range of 470 nm or more and 490 nm or less, and exhibits an emission spectrum effective for circadian characteristics.

In the light emitting device 36, in the chromaticity diagram of the CIE 1931 color system, x is 0.280 and y is 0.070, and x is 0.280 and y is 0.500 in the chromaticity coordinates. A second straight line connecting a second point, a first straight line connecting the second point, and a third point in chromaticity coordinates where x is 0.013 and y is 0.500. A region defined by a pure purple locus extending from the first point to the smaller x value in the chromaticity coordinates and a spectral locus extending from the third point to the smaller y value in the chromaticity coordinates. It emits the light inside. Since this light has a chromaticity far from the blackbody radiation locus, it creates illumination light by adjusting the color with other light emitting devices.

Further, in the light emitting device 36 of Example 5, the MR value is 2.0 or more. Further, the ratio of the emission intensity in the range of 470 nm to 490 nm to the emission intensity of the entire emission spectrum is 15% or more. Further, the luminous efficiency in the range of 115 lm / W or more and 140 lm / w or less is realized.

The characteristics of the emission spectra of these exemplified light emitting devices Examples 1 to 5 can be specified based on FIGS. 10A to 10E. For example, a wavelength band having a peak wavelength, a half width, and the like can be specified from these figures.

Next, the lighting control by the lighting control system 100 will be described. FIG. 11 is a flowchart showing the flow of lighting control in the lighting control system 100. Hereinafter, each flow will be described.

In step S1, the switch is turned on to turn on the light. The switch is turned on, for example, by an employee of a company who first arrives at room 20 of the day. Alternatively, the computer may be dynamically switched on by remote control. For example, the entrance gate on the first floor of an office building requires authentication with an IC card such as an employee ID card, and when the IC card is authenticated, the lighting switch of the company's room may be set to ON.

In step S2, the lighting control device 12 receives a lighting request, which is a request signal for turning on the lighting. The lighting request includes lighting specific information that identifies the lighting device 24 that is the target of ON / OFF control of lighting by the lighting switch. For example, a room number can be adopted as the lighting specific information. In this case, the lighting device 24 is controlled for each living room. When the living room 20 is large, the living room 20 may be divided into more subdivided areas and used as a control unit.

In step S3, the dimming management unit 13 of the lighting control device 12 acquires the dimming setting from the dimming setting information stored in the dimming setting storage unit 15. Further, the dimming management unit 13 sets the dimming associated with the lighting specific information based on the lighting specific information included in the received lighting request and the dimming setting information stored in the dimming setting storage unit 15. To get.

FIG. 12 is a diagram showing an example of a data structure of dimming setting information stored in the dimming setting storage unit 15. The dimming setting information in this example is the contractor information 16 set in the unit of the company that rents the living room 20, in other words, the unit of the contractor who uses one or a plurality of living rooms 20 in the building 1.

In the contractor information 16, the contractor identification code, the floor, the living room, and the basic working hours are registered according to the contractor. The contractor identification code is information that identifies the company that rents the room 20, that is, the contractor of the rental contract. The number of floors where the room 20 rented by the contractor is located is registered on the floor, and the room number of the room 20 is registered in the room. That is, the lighting specific information is registered.

The time zone desired by the contractor is registered in the basic working hours. The contractor may decide as appropriate, but typically, the basic working hours from the start time to the end time based on the working style of the company are registered. Generally, it is assumed that the start time is set between 7:00 and 10:30, and the end time is set between 16:00 and 19:00.

Further, as shown in FIG. 12, one company can rent a plurality of living rooms and register different basic working hours depending on the living room. It is also possible to register the time zone of the lunch break when the light is turned off during the lunch break. The dimming management unit 13 of the lighting control device 12 acquires the dimming setting associated with the lighting specific information included in the lighting request from the contractor information 16.

13A to 13E are diagrams for explaining an example of dimming setting information stored in the dimming setting storage unit 15. The dimming setting information in this example is dimming rule information 17 that defines how the lighting is controlled in a cycle of one day.

The dimming rule information 17 determines, for example, the degree of the circadian characteristic according to the time zone so that the circadian characteristic changes according to the time zone. Further, when performing color matching, the correlated color temperature may be determined according to the time zone. 13A to 13D show an example of a dimming rule in which the circadian characteristics are determined according to the time zone, and FIG. 13E shows an example of a dimming rule in which the correlated color temperature is determined according to the time zone. There is.

In the lighting fixture 30, the circadian characteristic or the correlated color temperature of the lighting by the lighting device 24 is changed by changing the ratio of irradiating the light by the first light emitting device 37 and the light by the second light emitting device 38. Can be done. That is, the dimming rule information is information that defines a rule for changing the irradiation ratio of the light by the first light emitting device 37 of the lighting fixture 30 and the light by the second light emitting device 38 according to the time zone of the day. be.

In the example of FIG. 13A (dimming rule 1), the circadian characteristic is the lowest value in the day from 0:00 to 6:00, and changes to the maximum value at 6:00. After that, the maximum value is maintained until 15:30, and the circadian characteristic decreases over time from 15:30 to the end of the basic working hours. And after the closing time, it is the lowest value until 24:00.

That is, the dimming rule 1 stipulates that the circadian characteristic should be increased at a predetermined time (6 o'clock) set by the manager of the building 1. In addition, it is stipulated that the circadian characteristics be reduced from a predetermined time (15:30) set by the manager of the building 1. In addition, the circadian characteristics should be gradually reduced from the predetermined time (15:30) set by the manager of the building 1 to the predetermined time (end time of basic working hours) set by the contractor. Is stipulated.

In the example of FIG. 13B (dimming rule 2), the circadian characteristic is the lowest value in the day from 0:00 to 1 hour before the start time of the basic working hours, and 1 hour before the start time. It changes to the maximum value. After that, the maximum value is maintained until 15:30, and the circadian characteristic decreases with time from 15:30 to 18:00. And after 18:00, it is the lowest value until 24:00.

That is, the dimming rule 2 stipulates that the circadian characteristic is increased based on a predetermined time (starting time of basic working hours) set by the contractor. In addition, it is stipulated that the circadian characteristics be reduced from a predetermined time (15:30) set by the manager of the building 1. In addition, it is stipulated that the circadian characteristics are gradually reduced in a predetermined time zone (15:30 to 18:00) determined by the manager of the building 1. In addition, the time to increase the circadian characteristics may be determined based on the predetermined time (starting time of basic working hours) set by the contractor and the predetermined condition (1 hour before the starting time). It has been decided.

In the example of FIG. 13C (dimming rule 3), the circadian characteristic is the lowest value in the day from 0:00 to 6:00, and the lapse of time from 6:00 to the start time of the basic working hours. Circadian characteristics will increase. After that, the maximum value is maintained from the start time to the end time, and it changes to the minimum value at the end time. And after the closing time, it is the lowest value until 24:00.

That is, the dimming rule 3 stipulates that the circadian characteristic should be increased from a predetermined time (6 o'clock) set by the manager of the building 1. In addition, it is stipulated that the circadian characteristics be reduced at a predetermined time (the end time of basic working hours) set by the contractor. In addition, it is stipulated that the circadian characteristics will be gradually increased from the predetermined time (6 o'clock) set by the manager of the building 1 to the predetermined time (starting time of basic working hours) set by the contractor. Has been done.

In the example of FIG. 13D (dimming rule 4), the circadian characteristic is the lowest value in the day from midnight to the time of sunrise (sunrise time), and the start time of the basic working hours from the day rise time. In the meantime, the circadian characteristics increase over time. After that, the maximum value is maintained until 15:30, and the circadian characteristic decreases over time from 15:30 to the end of the basic working hours. In addition, the circadian characteristic does not reach the minimum value at the end of the working hours, and the circadian characteristic decreases over time even after the meeting time. Then, the minimum value is reached at 20:00, and after that, the minimum value is maintained until 24:00.

That is, the dimming rule 4 stipulates that the time for increasing the circadian characteristic is determined based on the natural environment information (sunrise time). The sunrise time can be determined by statistically obtained information regarding the area where the lighting control system 100 is constructed. In addition, based on the sunset time, a dimming rule may be set so that the circadian characteristic becomes lower according to the sunset. In addition, a dimming rule that minimizes the circadian characteristics may be set between sunset and sunrise.

Further, according to the dimming rule 4, the circadian characteristic is reduced over time to a predetermined ratio (for example, 50%) of the maximum value at a predetermined time (end time of basic working hours) determined by the contractor. It is stipulated. Further, after that, it is stipulated that the circadian characteristics are reduced over time until a predetermined time (20:00) set by the manager of the building 1. again,

In the example of FIG. 13E (dimming rule 5), the correlated color temperature is the lowest value in the day from 0:00 to 6:00, and from 6:00 to the start time of the basic working hours. The correlated color temperature rises over time. After that, the maximum value is maintained from the start time to 15:30, and the correlated color temperature decreases over time from 15:30 to the end time of the basic working hours. And after the closing time, it is the lowest value until 24:00.

That is, the dimming rule 5 stipulates that the correlated color temperature is increased at a predetermined time (6 o'clock) set by the manager of the building 1. Further, it is stipulated that the correlated color temperature is reduced from a predetermined time (15:30) set by the manager of the building 1. Further, it is stipulated that the increase and decrease of the correlated color temperature are performed in stages.

As described above, the dimming rule defines a rule for changing the value of the circadian characteristic due to the illumination of the illumination device 24 during the day. Further, the value of the circadian characteristic can be changed by changing the irradiation ratio of the light from the first light emitting device 37 of the lighting fixture 30 and the light from the second light emitting device 38.

This dimming rule may be set so that the melanopic ratio of the illumination light at 10 o'clock is larger than the circadian characteristic of the illumination light at 17:00. Further, it is preferable that the difference between the maximum and the minimum of the circadian characteristic between 10 o'clock and 12 o'clock is smaller than the difference between the maximum and the minimum of the circadian characteristic between 14:00 and 18:00. Further, it is preferable that the average value of the circadian characteristics between 10 o'clock and 12 o'clock is set to be higher than the average value of the circadian characteristics between 16:00 and 18:00.

Not limited to these illustrated dimming rules, dimming rules can be determined by combining the elements shown in each example. Further, the dimming rule may be determined by incorporating elements other than those shown here. For example, a dimming rule may be set during the lunch break.

It should be noted that such a dimming rule is a rule that takes into consideration the influence on the human body. The details will be described later, but by appropriately selecting the first light emitting device 37 and the second light emitting device 38, the lighting can be controlled in consideration of the influence on the human body even by the dimming rule 5 that defines the correlated color temperature. Will be done. In the lighting control system 100, the dimming rule considers the human life rhythm of waking up in the morning and sleeping at night, and the value of the circadian characteristic becomes higher in the activity time zone such as morning and noon, and the circadian in the evening and night than in the daytime. The control mode of the lighting is determined so that the value of the characteristic becomes low. In addition, by setting the dimming rule according to the working style of the contractor, it is possible to promote a healthy life rhythm while increasing the intellectual productivity of the employees during working hours.

The dimming management unit 13 of the lighting control device 12 acquires such dimming rule information 17 from the dimming setting information stored in the dimming setting storage unit 15. It is sufficient that the dimming setting storage unit 15 stores dimming rule information in which at least one dimming rule is registered. If there is only one dimming rule, it will be applied uniformly to the contractor.

Further, a plurality of dimming rules may be stored and the contractor may be made to select a desired dimming rule. Alternatively, a customized dimming rule may be registered in consideration of the work style of the contractor. When applying the dimming rule according to the contractor, for example, in the contractor information, information specifying the dimming rule applied to each contractor is registered.

In step S4, the dimming management unit 13 of the lighting control device 12 determines the dimming degree at the current time based on the acquired dimming setting information. For example, based on the contractor information and the dimming rule information, the dimming degree corresponding to this is specified from the circadian characteristic or the correlated color temperature at the current time, and the ratio of irradiating the light by the first light emitting device 37. , And the ratio of irradiating the light by the second light emitting device 38, respectively.

The irradiation ratio of the first light emitting device 37 and the second light emitting device 38 may be determined by the dimming driver 60. That is, in the lighting control device 12, the value (dimming degree) of the circadian characteristic or the correlated color temperature is specified, and this value is transmitted to the dimming driver 60. Then, the irradiation ratio may be determined by the dimming driver 60 that has received the dimming degree. The correspondence between the value of the circadian characteristic and the irradiation ratio of the light emitting device 36 is managed by the lighting control system 100 (lighting control device 12 or dimming driver 60) as characteristic data of the lighting fixture 30.

Here, when the lighting control system 100 is used by a company in a building 1 such as an office building, the illuminance is maintained at a certain value or higher according to the working environment while the lighting is ON. That is, when the circadian characteristics are changed, the lighting is controlled so that the illuminance does not become extremely low and the workability of the employee is not impaired. In a general office building, for example, the illumination light by the lighting fixture 30 is illuminated so that an illuminance of 500 lpx or more is applied to the desk illuminance.

Further, at least during the working hours of basic employees, the illuminance is controlled to a certain level or higher according to the working environment while the lighting is on. The basic employee working hours include, for example, a time zone from the start time or 9:00 to the end time or 18:00, excluding the lunch break. The working hours are not limited to this. For example, in a country that has a system such as daylight saving time, it may be an early time zone.

In step S5, the dimming management unit 13 of the lighting control device 12 transmits a dimming instruction to the lighting device 24 so that the lighting is dimmed and controlled by the determined dimming degree. In the configuration of FIG. 6, the lighting control device 12 transmits a lighting instruction to the dimming driver 60 that is communicably connected. After that, the lighting control device 12 periodically determines the dimming degree and transmits the dimming instruction until the lighting switch is turned off and the lighting OFF request is received. When the lighting OFF request is received, a lighting instruction is transmitted to the lighting device 24.

In step S6, the lighting device 24 that has received the dimming instruction determines the ratio of irradiating the light from the first light emitting device 37 and the light from the second light emitting device 38 of the lighting fixture 30 according to the received dimming instruction. Control and illuminate the illumination light. As a result, the lighting is turned on. In the configuration of FIG. 6, the dimming control unit 61 of the dimming driver 60 controls the light emitting control unit 35 of the lighting fixture 30, and the light emitting control unit 35 controls the first light emitting device 37 and the second light emitting device in response to this control. 38 is made to emit light at an appropriate irradiation ratio.

Even if the dimming driver 60 records the dimming rule applied to the lighting fixture 30 that controls dimming, and the dimming driver 60 executes the processes from step S2 to step S6. good. In this case, the lighting control device 12 transmits the dimming setting to the target dimming driver 60 at the timing when the dimming setting information is registered or renewed due to the new contract or contract renewal, and the dimming driver 60 records the received dimming setting. Further, when the dimming rule is a rule according to the start time or the end time, the lighting control device 12 transmits the dimming rule and the dimming setting including the condition parameter (start time or end time).

As described above, in the lighting control system 100, while the lighting is ON, dimming is performed according to the time zone based on the dimming rule.

Next, in the lighting control system 100, the light emitting device adopted for the first light emitting device 37 and the second light emitting device 38 is selected from the above-mentioned light emitting device examples 1 to light emitting device example 5, and the above-mentioned dimming rule is applied. A case where dimming control is performed based on this will be described. The case where the color matching control is not performed and the case where the color matching control is performed will be described separately.

When the color matching control is not performed, a light emitting device having the same correlated color temperature can be adopted for the first light emitting device 37 and the second light emitting device 38. Therefore, the light emitting device of Example 5 is not adopted here in the first light emitting device 37 and the second light emitting device 38. For example, in a building such as an office building, a lighting fixture 30 that emits daylight color or daylight white light is often adopted. Further, in the range of the correlated color temperature in the chromaticity diagram of the CIE 1931 color system, a light emitting device having a temperature of 3000 K or more and 7000 K or less is often adopted.

The same correlated color temperature here is not limited to the case where the values are exactly the same correlated color temperature. For example, it may include a range of correlated color temperatures recognized as the same color band in the field of lighting, such as daylight colors, daylight whites, or light bulb colors. Further, for example, the correlated color temperature may be between 5000K and 6000K, between 3500K and 4500K, or between 2000K and 3000K as the same correlated color temperature. However, the difference in the correlated color temperature between the first light emitting device 37 and the second light emitting device 38 is preferably within 500 K, and more preferably within 100 K.

Further, the allowable range of the difference with the higher correlated color temperature may be larger than the allowable range of the difference with the lower correlated color temperature. For example, when aligning at a correlated color temperature larger than 6500K, it is preferably within ± 500K (thus, when aligning at 6500K, variations from 7000K to 6000K are allowed as the same correlated color temperature). When the correlated color temperature is aligned in any of the ranges of 5000K to 5750K, it is preferably within ± 250K. Further, when the correlated color temperature is made uniform in any of the ranges of 3400K to 4600K, it is preferably within ± 150K. When the correlated color temperature is aligned in any of the ranges from 2700K to 3150K, it is preferably within ± 100K.

Table 1 shows a circadian in the case where different light emitting devices are selected from the light emitting devices of Examples 1 to 5 for the first light emitting device 37 and the second light emitting device 38 and the dimming control is performed based on the dimming rule. This is a summary of the characteristics. Here, as the circadian characteristics, MR (melanopic ratio) and the ratio of the emission intensity in the range of 470 nm to 490 nm to the overall emission intensity of the emission spectrum were determined. In the table, each is designated as a circadian characteristic 1 and a circadian characteristic 2.

Of the first light emitting device 37 and the second light emitting device 38, only the light emitting device having the higher value of the circadian characteristic is made to emit light to illuminate the illumination light, so that the dimming control with the maximum circadian characteristic can be executed. can. On the other hand, by illuminating the illumination light by causing only the light emitting device having the lower value of the circadian characteristic to emit light, it is possible to execute the dimming control with the minimum circadian characteristic. In Table 1, the first light emitting device 37 has a light emitting device having a higher circadian characteristic, and the second light emitting device 38 has a light emitting device having a lower circadian characteristic.

The control for obtaining the maximum or the minimum does not necessarily have to be a mode in which only one of the first light emitting device 37 and the second light emitting device 38 emits light. It suffices if the light emission ratios of the first light emitting device 37 and the second light emitting device 38 can be adjusted to realize the maximum and minimum of the circadian characteristics defined in the dimming rule.

As can be seen from Table 1, in the lighting control system 100 that controls lighting by the lighting device 24 at the same correlated color temperature, the difference between when the circadian characteristic 1 is maximized and when it is minimized in the cycle of one day. It can be 0.010 or more. Furthermore, the difference can be 0.165 or more.

Further, the difference between the time when the circadian characteristic 2 becomes the maximum and the time when the circadian characteristic 2 becomes the minimum in the cycle of one day can be 0.05% or more. Furthermore, the difference can be 4.70% or more.

In addition to this, the control range of the circadian characteristic 1 and the control range of the circadian characteristic 2 at the same correlated color temperature can be similarly derived from the disclosure in Table 1. Further, the luminous efficiency and the average color rendering index of the light emitting device examples 1 to 4 can be combined with Table 1 to perform comprehensive control.

For example, Examples 1-3, 2-3, and 3-3 in Table 1 are the results when two light emitting devices having good luminous efficiency are selected from the light emitting device examples 1 to the light emitting device example 4. be. From this result, it is possible to make the difference between when the circadian characteristic 1 is maximum and when it is minimum is 0.085 or more while maintaining the luminous efficiency of 170 lm / W or more. Furthermore, the difference can be 0.100 or more.

Further, in the case where the correlated color temperature of the first light emitting device 37 and the second light emitting device 38 is 5000 K and 6500 K, the maximum difference between the maximum and the minimum of the circadian characteristic 1 is the maximum, and the maximum of the circadian characteristic 2. And the embodiment in which the minimum difference is the maximum are common. Specifically, Example 2-1 and Example 3-1 are examples in which the difference is maximum.

The circadian characteristic 1 is an evaluation value corresponding to the circadian response, and the circadian characteristic 2 is an evaluation value corresponding to the peak wavelength of the melanopic from 470 nm to 490 nm. As can be seen from the circadian response of FIG. 1, the circadian characteristic 1 is also affected by the emission spectrum in the wavelength range other than 470 nm to 490 nm.

By using a lighting fixture 30 having a large difference in circadian characteristic 1 and a large difference in circadian characteristic 2, a lighting control system 100 having excellent circadian response and excellent melatonin secretion control can be realized. Can be done.

When performing color matching control, light emitting devices having different correlated color temperatures can be adopted for the first light emitting device 37 and the second light emitting device 38. Examples of the toning range include a range of 2700K to 6500K, or 3000K to 5000K. That is, the lighting fixture 30 that can adjust the color in the range from the light bulb color to the daylight color or the daylight white color is often adopted.

When trying to adjust the color according to the circadian rhythm, if the one with the higher correlation color temperature is the first light emitting device 37 and the one with the lower correlated color temperature is the second light emitting device 38, the first light emitting device 37 is equipped with a light emitting device having high circadian characteristics. A light emitting device having a low circadian characteristic is used for the second light emitting device 38. This is because daylight and neutral white lights with a high correlated color temperature are illuminated in the daytime, and light bulb colors with a low correlated color temperature are illuminated in the morning and evening. The mode of toning is not limited to this, but toning that goes against the natural movement may have an adverse effect on the human body.

Table 2 shows a circadian in the case where different light emitting devices are selected from the light emitting devices of Examples 1 to 6 for the first light emitting device 37 and the second light emitting device 38 and the dimming control is performed based on the dimming rule. This is a summary of the characteristics. In the case of color matching, even if the same light emitting device is used, the value of the circadian characteristic changes. Therefore, the result when the same light emitting device is used for the first light emitting device 37 and the second light emitting device 38 is conventionally obtained. Here is an example.

In the lighting control system 100 that controls toning, the circadian characteristic is the maximum at the maximum of the toning range, and the circadian characteristic is the minimum at the minimum of the toning range. In the examples of Table 2, in Example 5 of the light emitting device, the circadian characteristic 1 is 2.843 and the circadian characteristic 2 is 21.32%.

As can be seen from Table 2, in the lighting control system 100 that controls the toning of the lighting by the lighting device 24, the difference between the time when the circadian characteristic 1 is the maximum and the time when the circadian characteristic 1 is the minimum in the cycle of one day is 2700K. It can be 0.65 or more in the toning range of 6500K. Furthermore, the difference can be 0.80 or more.

Further, the difference between the time when the circadian characteristic 1 becomes the maximum and the time when the circadian characteristic 1 becomes the minimum in the cycle of one day can be 0.40 or more in the toning range of 3000K to 5000K. Furthermore, the difference can be 0.50 or more. In this way, the control range of the circadian characteristic 1 is larger in the case of performing color matching than in the case of controlling with the same color.

Further, the difference between the time when the circadian characteristic 2 becomes the maximum and the time when the circadian characteristic 2 becomes the minimum in the cycle of one day can be set to 6.50% or more in the toning range of 2700K to 6500K. Furthermore, the difference can be 7.00% or more.

Further, the difference between the time when the circadian characteristic 2 becomes the maximum and the time when the circadian characteristic 2 becomes the minimum in the cycle of one day can be 4.50% or more in the toning range of 3000K to 5000K. Furthermore, the difference can be 5.00% or more.

Further, as can be seen from Table 2, in the lighting control system 100, a lighting device having a first light emitting device having a circadian characteristic 1 value of 1.13 or more and a second light emitting device having a value of 0.48 or less is used for 2700K. It is possible to control the toning in the range of 6500K. Further, the toning in the range of 3000K to 5000K can be controlled by a lighting device having a first light emitting device having a value of Circadian characteristic 1 of 0.95 or more and a second light emitting device having a value of 0.55 or less. ..

Further, in Table 2, Examples 5-1 to 5-3 and Examples 5-4 to 5-6 have the same toning range, and the correlated color temperature of the first light emitting device 37 is determined. Further, it is an example in which the correlated color temperature of the second light emitting device 38 is different (however, the light emitting device of Example 5 is not different). From the results in Table 2, it can be seen that the values are different even within the same toning range.

Further, even if the toning from 3000K to 5000K is performed using the 2700K first light emitting device 37 and the 6500K second light emitting device 38, the difference between the maximum and the minimum of the circadian characteristic 1 is 0. It can be 40 or more. Furthermore, the difference can be 0.45 or more.

If the same combination of light emitting devices is used for the lighting device, it tends to be possible to make the minimum value of the circadian characteristics smaller by using a light emitting device that is closer to the toning range, and a light emitting device that is far from the toning range is used. It is considered that the use tends to increase the maximum value of the circadian characteristic. Further, it can be seen that a lighting device having good circadian characteristics can be configured even if the light emitting device is not close to the toning range.

For example, when color matching is performed in the range of 3000K to 5000K, a light emitting device having a correlated color temperature in the range of 5000K to 8000K can be adopted as the first light emitting device 37. As the second light emitting device 38, a light emitting device having a correlated color temperature in the range of 1500K to 3000K can be adopted.

For example, when color matching is performed in the range of 2700K to 6500K, a light emitting device having a correlated color temperature in the range of 6500K to 8000K can be adopted as the first light emitting device 37. As the second light emitting device 38, a light emitting device having a correlated color temperature in the range of 1500K to 2700K can be adopted.

For example, in the case of color matching, as the first light emitting device 37, x in the chromaticity coordinates is 0.280 and y in the chromaticity diagram of the CIE1931 color system instead of the one having a correlated color temperature of 8000K or less. The first straight line connecting the first point where is 0.070 and the second point where x is 0.280 and y is 0.500 in the chromaticity coordinates, the second point, and the color. A second straight line connecting a third point where x is 0.013 and y in 0.500 in degree coordinates, and a pure purple locus extending from the first point to the smaller value of x in chromaticity coordinates. And a spectral locus extending from the third point toward the smaller value of y in the chromaticity coordinates, and a light emitting device that emits light in the region defined by can be adopted.

<Second Embodiment>
Next, the lighting control system according to the second embodiment will be described. In the lighting control system according to the second embodiment, the lighting according to the first embodiment is configured in that the lighting fixture includes a third light emitting device in addition to the first light emitting device and the second light emitting device. Different from the control system. Further, the lighting device is different from the lighting control system according to the first embodiment in that light emission by the first light emitting device, the second light emitting device, and the third light emitting device is controlled. Other points are the same as the lighting control system according to the first embodiment. Therefore, except for FIGS. 6, 8, and 9, the figures used in the description of the first embodiment are also applied to the second embodiment. The same applies to the description of these figures.

FIG. 14 is a diagram showing an example of the configuration of the lighting device 224 and the connection between the lighting device 224 and the external device in the lighting control system. Further, FIG. 15 is a diagram showing a light emitting surface (a surface opposite to the ceiling installation surface) of the lighting fixture 230. Note that FIG. 15 shows a state in which the cover 33 of the lighting fixture 230 is removed. Further, FIG. 16 is a schematic cross-sectional view showing a third light emitting device 237 included in the lighting fixture 230.

As shown in FIG. 14, the lighting device 224 has a third light emitting device 237 as the light emitting device 36 adopted in the lighting fixture 230. Further, the light emission control unit 35 can control the light emission in the first light emission device 37, the light emission in the second light emission device 38, and the light emission in the third light emission device 237, respectively. For example, only one of the first light emitting device 37 and the second light emitting device 38 can emit light.

Further, the third light emitting device 237 has a light emitting element 39, a sealing member 43, and a molded body 42. The sealing member 43 seals the light emitting element 39, diffuses the light emitted from the light emitting element 39, and emits the light from the light emitting surface. The third light emitting device 237 does not have a wavelength conversion member as compared with the first light emitting device 37 and the second light emitting device 38. A wavelength conversion member may be used instead of the sealing member 43.

The light emitted by the third light emitting device 237 has a light emitting peak in the range of 360 nm or more and 400 nm or less. For example, it can be configured by a light emitting element 39 having a light emitting peak in the range of 360 nm or more and 400 nm or less. Further, it is preferable that the third light emitting device 237 does not emit light having a light intensity of 10% or more of the light intensity of the light emitting peak in the visible light region of 420 nm or more.

Further, it is preferable that the third light emitting device 237 does not emit light having a light intensity of 10% or more of the light intensity of the light emitting peak in a region of 320 nm or less. That is, the third light emitting device 237 has a light emitting peak in the range of 360 nm or more and 400 nm or less, and the emission wavelength of substantially effective light emitted from the third light emitting device 237 is in the range of 320 nm or more and 420 nm or less. It is preferable that it fits. The substantially effective light here is light emitted at a light intensity of 10% or more of the light intensity of the emission peak.

In the lighting control system 200, the light emitted by the third light emitting device 237 is not substantially used as the lighting light. In other words, in the lighting fixture 230, white light such as a light bulb color or neutral white that should be realized as illumination light is realized without light emission by the third light emitting device 237. That is, the light emitted by the third light emitting device 237 is an auxiliary light provided in consideration of the influence on the human body without having a great influence on the toning and dimming as the illumination light.

Therefore, in the lighting fixture 230, the number of arrangements of the third light emitting device 237 is smaller than the number of arrangements of the first light emitting device 37, and is smaller than the number of arrangements of the second light emitting device 38. Further, the auxiliary light emitted by the third light emitting device 237 emitted by the lighting fixture 230 is emitted with a smaller illuminance than the illumination light emitted by the first light emitting device 37 and the second light emitting device 38.

In the illumination control system 200, the irradiance [W / m ² ] of the third light emitting device 237 is controlled in response to the fluctuation of the circadian characteristic of the illumination light. The mechanism for controlling dimming is the same as that described in the first embodiment.

For example, in the illumination control system 200, the irradiance [W / m ² ] of the third light emitting device 237 is controlled in response to the increase / decrease in the circadian characteristic of the illumination light. That is, the emission of the auxiliary light by the third light emitting device 237 is also controlled according to the fluctuation of the circadian characteristic of the illumination light illustrated in FIGS. 13A to 13E. When the circadian characteristic is the maximum, the irradiance of the third light emitting device 237 is also the maximum, and when the circadian characteristic is the minimum, the irradiance of the third light emitting device 237 is also the minimum.

For example, the light emitted by the third light emitting device 237 can have a maximum irradiance of ^{5.0 W / m 2.} Further, at the minimum, 0.0 W / m ² , that is, the light emitted by the third light emitting device 237 can be turned off.

Here, the effect of the auxiliary light by the third light emitting device 237 will be described. Research results have been reported that exposure to light in the range of 360 nm to 400 nm is effective in suppressing myopia and improving depression. Therefore, it is preferable that the auxiliary light from the third light emitting device 237 is irradiated during the working hours when the work is to be actively performed. Therefore, controlling the light emission by the third light emitting device 237 corresponding to the circadian characteristic is one preferable control mode.

Since the wavelength range of 360 nm or more and 400 nm or less is included in the ultraviolet A wave, photoaging occurs when the skin is irradiated with strong light for a long time. In the lighting control system 200, the maximum irradiance of the auxiliary light by the third light emitting device 237 is adjusted in consideration of this point. For example, considering that the irradiance of ultraviolet A wave is about 50 W / m ² in the midsummer noon time zone in Kanagawa prefecture, Japan, in the lighting control system 200, this is about 1/10 to 1/5, that is, The upper limit of the irradiance ^{is preferably 10 W / m 2} or less.

Further, in the lighting control system 200, the upper limit time of the continuous light emission of the auxiliary light by the third light emitting device 237 may be set so as not to continue the light emission by the auxiliary light beyond the upper limit time. For example, the dimming control unit 61 controls to limit the light emission of the auxiliary light for a certain period of time when the continuous light emission of the auxiliary light reaches the upper limit time, and to restart the light emission of the auxiliary light after a certain time elapses. .. As a specific example, the upper limit time of continuous light emission may be set to one and a half hours, and the time limit for limiting light emission from the time when the upper limit time is reached may be set to 30 minutes.

By avoiding long-term irradiation, photoaging can be suppressed. Further, in the case of illumination light such as the first light emitting device 37 and the second light emitting device 38, if the lighting suddenly goes out during working hours, the work will be hindered, but even if the third light emitting device 237 goes out, the lighting fixture Since the 230 remains functioning as a lighting, it does not interfere with the business.

As described above, in the lighting control system 200 that controls the third light emitting device 237 corresponding to the circadian characteristic, in particular, the lighting fixture 230 has the first light emitting device 37 and the second light emitting device 38 having the same correlated color temperature. It is considered to be effective when it is configured. As is clear from comparing Tables 1 and 2 described in the first embodiment, the amount of change in the circadian characteristics (when composed of the same correlated color temperature and as compared with the case where they are composed of different correlated color temperatures). The difference between the maximum and the minimum) is small. Therefore, by using not only the illumination light but also the auxiliary light, it is possible to promote the activation of the activity at an appropriate time zone.

Further, for example, in the lighting control system 200, the irradiance [W / m ² ] of the third light emitting device 237 is controlled against the increase / decrease of the circadian characteristic. That is, the emission of the auxiliary light by the third light emitting device 237 is also controlled by the fluctuation opposite to the fluctuation of the circadian characteristic of the illumination light exemplified in FIGS. 13A to 13E. When the circadian characteristic is the maximum, the irradiance of the third light emitting device 237 is the minimum, and when the circadian characteristic is the minimum, the irradiance of the third light emitting device 237 is the maximum.

As described above, the lighting control system 200 that controls the third light emitting device 237 against the circadian characteristic has, for example, the first light emitting device 37 and the second light emitting device 38 having different correlated color temperatures to control the lighting. It is considered to be effective in facilities such as hospitals. As is clear from Table 2 described in the first embodiment, when the components are composed of different correlated color temperatures, the lower the correlated color temperature, the lower the circadian characteristic. For example, in a hospital room with a depressed patient, it may be desired to suppress the risk of depression in response to the inhibitory effect of activation due to a decrease in circadian characteristics. Therefore, by radiating auxiliary light during the time when the circadian characteristics deteriorate, it is possible to stabilize the mental state while adjusting the circadian rhythm.

<Modified example of the second embodiment>
In the illumination control system 200 of the second embodiment, the third light emitting device 237 has been described as irradiating the auxiliary light having a light emitting peak in the range of 360 nm or more and 400 nm or less, but the auxiliary light is not limited to this. The third light emitting device 237 described in the second embodiment includes a light emitting device having a light emitting peak other than the range of 360 nm to 750 nm in addition to the auxiliary light having a light emitting peak in the range of 360 nm or more and 400 nm or less. May be good.

For example, auxiliary light having an emission peak may be irradiated in a range of 295 nm or more and 315 nm or less that promotes the production of vitamin D. However, since the light in this wavelength range is included in the ultraviolet B wave, the influence of photoaging is larger than that of the ultraviolet A wave. Therefore, it is desirable that the maximum irradiance is lower than the auxiliary light having an emission peak in the range of 360 nm or more and 400 nm or less.

The third light emitting device 237 in the lighting control system 200 has an auxiliary light having a light emitting peak in the range of 295 nm or more and 315 nm or less, instead of the auxiliary light having a light emitting peak in the range of 360 nm or more and 400 nm or less. Light may be adopted. As the auxiliary light, an auxiliary light having an emission peak in a wavelength range of 400 nm or less or 750 nm or more and having an emission in a wavelength range of 420 nm or more and 730 nm or less of 10% or less of the peak light intensity can be adopted. In addition, this auxiliary light is light that affects the internal rhythm and mental state of the human body by controlling the irradiance.

Although each embodiment of the present invention has been described above, the technical idea of the present invention is not limited to the specific embodiments described above. For example, in the embodiment, it is not necessary to limit the installation location of the lighting control system according to the present invention to an office building. For example, a lighting control system may be constructed in a hospital, a factory, a school, a commercial facility, or the like.

Further, the characteristics related to circadian rhythm may not be limited to those described in the embodiments. For example, in the embodiment, the MR value using the circadian response curve of FIG. 1 having a peak in the vicinity of 480 nm to 490 nm was adopted as the circadian characteristic 1, but instead of this circadian response curve, it was set to around 464 nm by Professor Brainard. The circadian characteristic calculated by using the action spectrum of the suppression of melatonin secretion on the human body having a peak may be adopted.

Further, an example in which the first light emitting device 37 and the second light emitting device 38 are individually formed as the light emitting device 36 to form the lighting fixture has been described, but the first light emitting device 37 and the second light emitting device 38 are described as one. It may be formed as one light emitting device.

17A to 17C are some examples of a form in which the first light emitting device 37 and the second light emitting device 38 are included in the housing of one light emitting device 36. In this case, the first light emitting device 37 and the second light emitting device 38 share one molded body 42.

In FIG. 17A, two cavities are formed by one molded body 42, and the light emitting element 39 and the wavelength conversion member 40 according to the first light emitting device 37, and the light emitting element 39 and the wavelength conversion member 40 according to the second light emitting device 38 are formed. , The form of the light emitting device 36 arranged in each cavity is shown.

In FIG. 17B, one cavity is formed by one molded body 42, and the light emitting element 39 and the wavelength conversion member 40 according to the first light emitting device 37, and the light emitting element 39 and the wavelength conversion member 40 according to the second light emitting device 38 are formed. The form of the light emitting device 36 arranged in the cavity is shown.

Further, the wavelength conversion member 40 for light emission by the first light emitting device 37, which is not necessary for light emission by the second light emitting device 38, is located around the light emitting element 39 according to the first light emitting device 37. Only provided. Similarly, the wavelength conversion member 40 for light emission by the second light emitting device 38, which is not necessary for light emission by the first light emitting device 37, is located around the light emitting element 39 according to the second light emitting device 38. Only provided. The wavelength conversion member 40 required for both the light emission by the first light emitting device 37 and the second light emitting device 38 is provided so as to cover the first light emitting device 37 and the second light emitting device 38.

In FIG. 17C, one cavity is formed by one molded body 42, and the light emitting element 39 and the wavelength conversion member 40 according to the first light emitting device 37, and the light emitting element 39 and the wavelength conversion member 40 according to the second light emitting device 38 are formed. The form of the light emitting device 36 arranged in the cavity is shown.

Further, as compared with FIG. 17B, there is no wavelength conversion member 40 that is a wavelength conversion member 40 for light emission by the first light emitting device 37 and is not necessary for light emission by the second light emitting device 38. The wavelength conversion member 40 for light emission by the second light emitting device 38, which is not necessary for light emission by the first light emitting device 37, is provided only around the light emitting element 39 according to the second light emitting device 38. Will be.

Further, the wavelength conversion member 40 provided only around the light emitting element 39 according to the second light emitting device 38 is composed of a plurality of layers. In addition, it may be one layer. In each layer, the phosphors are unevenly distributed on the lower surface. For example, such a wavelength conversion member 40 can be formed by attaching a sheet-shaped phosphor to a glass material.

Further, the side surface of the light emitting element 39 according to the second light emitting device 38 is covered with the reflective layer 44. As a result, the light from the light emitting element 39 according to the first light emitting device 37 is reflected by the reflective layer 44 before being incident on the light emitting element 39 according to the second light emitting device 38. Therefore, it is possible to suppress the wavelength conversion of the light from the light emitting element 39 according to the first light emitting device 37 by the wavelength conversion member 40 provided only around the light emitting element 39 according to the second light emitting device 38.

Further, the present invention can be applied even if it is not essential to have all the components disclosed by each embodiment in a necessary and sufficient manner. A person skilled in the art, or in the technical field to which the invention belongs, within the scope of the degree of freedom of design, even if some of the components disclosed by the embodiment are not described in the claims of the present invention. Applicability is possible, and the present specification discloses the invention on the premise that it includes this.

The lighting control system or lighting fixture described in each embodiment can be used in the field of lighting installed in an indoor space or the like.

100, 200 Lighting control system 1 Building 10 Management room 11 Management terminal 12 Lighting control device 13 Dimming management unit 14 Dimming setting registration unit 15 Dimming setting storage unit
16 Contractor information
17 Dimming rule information 20 Living room 21 Ceiling 22 Floor 23 Wall 24, 224 Lighting equipment 30, 230 Lighting equipment
31 Base plate
32 board
33 cover
34 fasteners
35 Light emission control unit
36 Luminous device
37 First light emitting device
38 Second light emitting device
237 Third light emitting device
39 Light emitting element
40 Wavelength conversion member
41 Fluorescent material
42 Mold
43 Sealing member
44 Reflective layer 50 Power adapter
51 Power supply unit
52 Power terminal
53 Dimming terminal 60 Dimming driver
61 Dimming control unit 70 CPU
71 ROM
72 RAM
73 Storage 74 Graphics I / F
75 Data I / F
76 Communication I / F
77 Input device

Claims (7)

It is a lighting control system that connects a lighting fixture and an information processing device so that they can communicate with each other.
The lighting fixture is
The first light emitting device and
A second light emitting device whose correlated color temperature is different from that of the first light emitting device,
A light emission control unit that controls the ratio of irradiating the light from the first light emitting device and the light from the second light emitting device to irradiate the illumination light.
Have,
The information processing device is
A dimming management unit that transmits a dimming instruction and changes the irradiation ratio of the light from the first light emitting device of the lighting fixture and the light from the second light emitting device according to the time zone of the day.
Have,
In the chromaticity diagram of the CIE1931 color system, the first light emitting device has a first point where x is 0.280 and y is 0.070 in chromaticity coordinates, and x is 0.280 and chromaticity coordinates. The first straight line connecting the second point where y is 0.500, the second point, and the third point where x is 0.013 and y is 0.500 in the chromaticity coordinates. , A pure purple locus extending from the first point to the smaller x value in the chromaticity coordinates, and a pure purple locus extending from the third point to the smaller y value in the chromaticity coordinates. A lighting control system that emits light in a region defined by a spectral trajectory and a melanopic ratio of 2.0 or more. The lighting control system according to claim 1, wherein the first light emitting device is such that the ratio of the light emitting intensity in the range of 470 nm to 490 nm to the light emitting intensity of the entire light emitting spectrum is 15% or more. Further having a third light emitting device having a light emitting peak in the range of 400 nm or less or 750 nm or more and emitting light having a light emission in the wavelength range of 420 nm or more and 730 nm or less is 10% or less of the peak light intensity.
The light emission control unit further controls the irradiance of light by the third light emitting device.
The dimming management unit further gives a dimming instruction to change the radiant illuminance of the light by the third light emitting device in response to the fluctuation of the melanopic ratio of the illumination light between the first light emitting device and the second light emitting device. Lighting control system to transmit. Based on the dimming instruction, the light emission control unit matches the fluctuation of the irradiance of the light by the third light emitting device with the fluctuation of the melanopic ratio of the illumination light by the first light emitting device and the second light emitting device. The lighting control system according to any one of claims 1 to 3, which is controlled as described above. In the light emission control unit, based on the dimming instruction, the fluctuation of the irradiance of the light by the third light emitting device is opposite to the fluctuation of the melanopic ratio of the illumination light by the first light emitting device and the second light emitting device. The lighting control system according to any one of claims 1 to 3, which is controlled by the fluctuation of the above. One of claims 1 to 5, wherein the light emission control unit is controlled based on the dimming instruction so that the light emitted by the third light emitting device is not continuously emitted for a predetermined upper limit time. The lighting control system described in. The lighting control system according to any one of claims 1 to 6, wherein the second light emitting device emits light having a correlated color temperature in the range of 1500K to 3000K in the chromaticity diagram of the CIE 1931 color system.

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