Lighting control system, lighting control method, and program

Abstract

To provide a lighting environment that is adopted to a condition selected by a user.SOLUTION: A lighting control system 100 comprises: an acquisition part 11; a processing part 12; and a control part 13. The acquisition part 11 acquires a lighted condition in a space Sp1 where a light from one or more light load 2 having three or more light sources 20 radiating a different color light is radiated. The processing part 12 determines a color level corresponded to the lighted condition acquired by the acquisition part 11. The control part 13 controls one or more light load 2 so as to radiate a light of a color level determined by the processing part 12.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a lighting control system, a lighting control method, and a program. [Background technology]

[0002] Patent Document 1 discloses a lighting control device that displays, on a touch panel, a graphical user interface for controlling a lighting fixture equipped with a three-color LED (Light Emitting Diode) package. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2021-190283 A Summary of the Invention [Problem to be solved by the invention]

[0004] The present invention provides a lighting control system, a lighting control method, and a program that can easily provide a lighting environment suitable for conditions selected by a user. [Means for solving the problem]

[0005] A lighting control system according to an aspect of the present invention includes an acquisition unit, a processing unit, and a control unit. The acquisition unit acquires illumination conditions in a space where light is emitted from one or more lighting loads having three or more light sources that emit light of different colors. The processing unit determines a chromaticity according to the illumination conditions acquired by the acquisition unit. The control unit controls the one or more lighting loads to emit light of the chromaticity determined by the processing unit.

[0006] In a lighting control method according to one aspect of the present invention, illumination conditions in a space in which light is emitted from one or more lighting loads having three or more light sources emitting light of different colors are acquired. In the lighting control method, a chromaticity is determined according to the acquired illumination conditions. In the lighting control method, the one or more lighting loads are controlled to emit light of the determined chromaticity.

[0007] A program according to one aspect of the present invention causes one or more processors to execute the lighting control method. Effect of the Invention

[0008] The lighting control system, lighting control method, and program of the present invention have the advantage of easily providing a lighting environment suited to conditions selected by a user. [Brief description of the drawings]

[0009] [Figure 1] FIG. 1 is a block diagram showing a functional configuration of a lighting control system according to an embodiment. [Diagram 2] FIG. 2 is a schematic diagram showing an example of input at an input terminal in the lighting control system according to the embodiment. [Diagram 3] FIG. 3 is a diagram illustrating an example of a chromaticity range according to the embodiment. [Figure 4] FIG. 4 is a diagram illustrating another example of the chromaticity range according to the embodiment. [Diagram 5] FIG. 5 is a diagram illustrating yet another example of the chromaticity range according to the embodiment. [Figure 6] FIG. 6 is a flowchart showing an example of the operation of the lighting control system according to the embodiment. [Figure 7] FIG. 7 is a schematic diagram showing an example of input at an input terminal in a lighting control system according to a modified example of the embodiment. [Figure 8] FIG. 8 is a block diagram showing a functional configuration of a lighting control system according to another modified example of the embodiment. [Figure 9]FIG. 9 is an explanatory diagram of a method of determining chromaticity in a lighting control system according to yet another modified example of the embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] Hereinafter, the embodiments will be described in detail with reference to the drawings. Note that the embodiments described below are all comprehensive or specific examples. The numerical values, shapes, materials, components, component arrangement and connection forms, steps, and order of steps shown in the following embodiments are merely examples and are not intended to limit the present invention. In addition, among the components in the following embodiments, components that are not described in the independent claims will be described as optional components.

[0011] Note that each figure is a schematic diagram and is not necessarily strictly illustrated. Therefore, for example, the scales in each figure do not necessarily match. Also, each figure is a schematic diagram in which emphasis, omission, and ratio adjustment are appropriately performed to illustrate the present invention, and may differ from the actual shape, positional relationship, and ratio. Also, in each figure, the same reference numerals are given to substantially the same configurations, and duplicated explanations may be omitted or simplified.

[0012] In this specification, terms indicating relationships between elements such as "same" and numerical values ​​and numerical ranges are not expressions that express only the strict meaning, but are expressions that mean that they include a substantially equivalent range, for example, a difference of about several percent (for example, about 5%). For example, "horizontal direction" means not only a completely horizontal direction, but also an error of about several percent, for example, 5%, that occurs during manufacturing or arrangement.

[0013] (Embodiment) FIG. 1 is a block diagram showing a functional configuration of a lighting control system 100 according to an embodiment. The lighting control system 100 according to the embodiment is used in a space Sp1 in a facility such as a store or a commercial facility, and is a system for providing a lighting environment in the space Sp1 by controlling one or more lighting loads 2 installed in the space Sp1. The lighting control system 100 may be used in, for example, an office or the like. The lighting control system 100 may be used in a residential facility such as a detached house or an apartment building, in an educational facility such as an elementary school, a junior high school, a high school, or a university, or in a public facility such as a community center or a library. In addition, the lighting control system 100 may be used in an event venue such as a station, a hotel, or a hall.

[0014] [Lighting Load] One or more lighting loads 2 are installed in the space Sp1. In the embodiment, each lighting load 2 is installed on the ceiling of the space Sp1. Of course, each lighting load 2 may be installed not only on the ceiling of the space Sp1, but also on a wall, a floor, or a fixture such as a desk. Each lighting load 2 provides a lighting environment for the space Sp1 by illuminating the space Sp1 with illumination light. The parameters of the lighting environment may include, for example, the illuminance, light color, or light distribution of a place illuminated by the illumination light.

[0015] In the embodiment, each lighting load 2 includes three or more light sources 20 having solid-state light-emitting elements such as LEDs and emitting light of different colors. The solid-state light-emitting elements used in each light source 20 are not limited to LEDs, and may be organic EL (Electro-Luminescence) elements or the like. Each lighting load 2 emits light that is a mixture of the light emitted by each of the three or more light sources 20.

[0016] In the embodiment, in each lighting load 2, the three or more light sources 20 include a first light source 21 that emits red light, a second light source 22 that emits green light, and a third light source 23 that emits blue light. Specifically, the first light source 21 is configured to include one or more red LEDs, the second light source 22 is configured to include one or more green LEDs, and the third light source 23 is configured to include one or more blue LEDs.

[0017] In the embodiment, the lighting load 2 may be a base light or the like serving as ambient lighting that uniformly illuminates a target space, or may be a spot light, a downlight, a universal downlight, or the like serving as a task light. In other words, the lighting load 2 may have a diffuse light distribution characteristic or a concentrated light distribution characteristic.

[0018] In the embodiment, the one or more lighting loads 2 may all be ambient lighting, all be task lighting, or a mixture of ambient lighting and task lighting.

[0019] [Lighting control system] 1, the lighting control system 100 includes an acquisition unit 11, a processing unit 12, a control unit 13, and a storage unit 14. In the embodiment, the lighting control system 100 needs to include at least the acquisition unit 11, the processing unit 12, and the control unit 13, and does not need to include the storage unit 14. The lighting control system 100 may be installed within the space Sp1, or may be installed outside the space Sp1.

[0020] The acquisition unit 11 acquires illumination conditions in a space Sp1 where light is emitted from one or more lighting loads 2. Here, the illumination conditions are information that directly or indirectly indicates targets in the space Sp1 that are illuminated with light from each lighting load 2, and is selected by, for example, a user who uses the space Sp1.

[0021] For example, the illumination condition is information indicating an illuminating object in the space Sp1 to be irradiated with light from one or more lighting loads 2. For example, when the space Sp1 is a space in a store, the illuminating object may include meat, fish, vegetables, bread, prepared foods, and the like displayed in the space Sp1.

[0022] The illumination condition may be information indicating the usage manner of the space Sp1. For example, the usage manner of the space Sp1 may include a store, an office, a house, a hospital, or the like. The illumination condition may be information indicating the purpose of the user in the space Sp1. For example, the purpose of the user in the space Sp1 may include study, communication, work, or the like. The illumination condition may be information indicating the atmosphere of the space Sp1. For example, the atmosphere of the space Sp1 may include an atmosphere that feels warm, an atmosphere that feels cool, or the like.

[0023] In the embodiment, the acquisition unit 11 acquires illumination conditions based on information input by a user at the input terminal 3. The input terminal 3 is a controller dedicated to the lighting control system 100 installed in the space Sp1, for example. The input terminal 3 communicates with the acquisition unit 11 to transmit a signal including the input information received at the input terminal 3 to the acquisition unit 11. By receiving this signal, the acquisition unit 11 acquires the input information. The communication between the acquisition unit 11 and the input terminal 3 may be wired communication or wireless communication, and the communication standard is not particularly limited.

[0024] The input terminal 3 may be realized by an information terminal possessed by a user. Examples of the information terminal include a smartphone, a tablet terminal, a personal computer, etc. In this case, the user can use the information terminal as the input terminal 3 by installing an application for executing the functions of the input terminal 3 in the information terminal and activating the application on the information terminal.

[0025] Hereinafter, an example will be described in which the acquisition unit 11 acquires the illumination conditions when the illumination conditions are information indicating an illuminated object. Fig. 2 is a schematic diagram showing an example of input at the input terminal 3 in the lighting control system 100 according to the embodiment. In the example shown in Fig. 2, the display 30 provided on the input terminal 3 or the display 30 attached to the input terminal 3 displays "meat", "fish", "vegetables", and "bread" as options for the illuminated object.

[0026] The user selects a desired option from these options. For example, if the input terminal 3 is a personal computer, the user selects a desired option using a pointing device such as a mouse. Also, for example, if the display 30 is a touch panel display, the user selects a desired option by touching it with a finger, etc.

[0027] The input terminal 3 transmits, as input information, information indicating the irradiated object corresponding to the option selected by the user, to the acquisition unit 11. This enables the acquisition unit 11 to acquire information indicating the irradiated object. For example, when the user selects the option "vegetables" on the input terminal 3, the acquisition unit 11 acquires information indicating that the irradiated object is "vegetables."

[0028] The processing unit 12 determines a chromaticity according to the illumination conditions acquired by the acquisition unit 11. The chromaticity determined by the processing unit 12 is reflected in the color of light emitted from one or more lighting loads 2. Specifically, the processing unit 12 compares data stored in advance in the storage unit 14 with the illumination conditions acquired by the acquisition unit 11 to read and determine a chromaticity according to the illumination conditions.

[0029] In the embodiment, when the irradiation conditions are information indicating an irradiated object, the processing unit 12 determines a chromaticity according to the irradiated object from a reference range A0 including four ranges, a first range B1, a second range B2, a third range B3, and a fourth range B4 in the CIExy chromaticity diagram, as shown in Fig. 3. The CIExy chromaticity diagram is a chromaticity diagram in the XYZ color system recommended in 1931 by the Commission Internationale de l'Eclairage (abbreviated as CIE) (see "JIS Z 8701").

[0030] Fig. 3 is an explanatory diagram of an example of the range of chromaticity according to the embodiment. In Fig. 3, the first range B1 is a reference range when the irradiated object is fish, the second range B2 is a reference range when the irradiated object is meat, the third range B3 is a reference range when the irradiated object is vegetables, and the fourth range B4 is a reference range when the irradiated object is bread or a side dish.

[0031] Specifically, when the irradiated object is a fish, the processing unit 12 determines the chromaticity to be included in a first range B1 surrounded by six points whose x and y coordinates on the CIExy chromaticity diagram are (0.3587, 0.3176), (0.3517, 0.3131), (0.3465, 0.3027), (0.3483, 0.2970), (0.3553, 0.3015), and (0.3606, 0.3119).

[0032] Furthermore, when the object to be irradiated is meat, the processing unit 12 determines the chromaticity to be included in a second range B2 surrounded by six points whose x and y coordinates on the CIExy chromaticity diagram are (0.3878, 0.3306), (0.3808, 0.3261), (0.3756, 0.3157), (0.3774, 0.3100), (0.3844, 0.3145), and (0.3897, 0.3249).

[0033] Furthermore, when the irradiated object is a vegetable, the processing unit 12 determines the chromaticity to be included in a third range B3 surrounded by six points whose x and y coordinates on the CIExy chromaticity diagram are (0.3789, 0.3410), (0.3719, 0.3365), (0.3667, 0.3261), (0.3685, 0.3203), (0.3755, 0.3249), and (0.3808, 0.3353).

[0034] Furthermore, when the object to be irradiated is bread or a prepared dish, the processing unit 12 determines the chromaticity to be included in a fourth range B4 surrounded by six points whose x and y coordinates on the CIExy chromaticity diagram are (0.4581, 0.4111), (0.4511, 0.4066), (0.4459, 0.3962), (0.4477, 0.3905), (0.4571, 0.3950), and (0.4600, 0.4054).

[0035] Here, the processing unit 12 is not limited to determining the chromaticity corresponding to the irradiated object from the reference range A0, but may determine the chromaticity corresponding to the irradiated object from any of the following ranges: a first reference range A1, a second reference range A2, and a third reference range A3, which are further limited than the reference range A0.

[0036] As shown in Fig. 3, the first reference range A1 is a triangular range that includes the first range B1, the second range B2, the third range B3, and the fourth range B4 of the reference range A0 and has an area of ​​0.02858 or more. Specifically, the first reference range A1 is a range that connects three points whose xy coordinates are (0.6167, 0.3681), (0.4141, 0.4716), and (0.2492, 0.2737) in the CIExy chromaticity diagram. This first reference range A1 has an area of ​​0.028579 and a perimeter of 0.86448.

[0037] Fig. 4 is an explanatory diagram of another example of the chromaticity range according to the embodiment. As shown in Fig. 4, the second reference range A2 is a triangular range including the first range B1, the second range B2, the third range B3, and the fourth range B4 of the reference range A0, and has an area of ​​0.00337 or more and less than 0.02858. Specifically, the second reference range A2 is a range A21 that connects three points with xy coordinates of (0.309, 0.281), (0.445, 0.336), and (0.463, 0.421) on the CIExy chromaticity diagram, for example. This range A21 has an area of ​​0.005285 and a perimeter of 0.44171. The second reference range A2 is, for example, a range A22 that connects three points with xy coordinates of (0.372, 0.29), (0.483, 0.428), and (0.312, 0.309) on the CIExy chromaticity diagram. This range A22 has an area of ​​0.0051945 and a perimeter of 0.44837.

[0038] 5 is a diagram illustrating yet another example of the chromaticity range according to the embodiment. As shown in FIG. 5, the third reference range A3 is a range of the reference range A0 having an area of ​​4.1608×10 -4 Specifically, the third range A3 is a range that connects the center coordinates of the first range B1, the center coordinates of the second range B2, the center coordinates of the third range B3, and the center coordinates of the fourth range B4 in the CIExy chromaticity diagram, for example. The third reference range A3 has an area of ​​4.1608×10 -4 and the perimeter is 0.2757.

[0039] The control unit 13 is capable of communicating with each lighting load 2 installed in the space Sp1, and controls each lighting load 2 by transmitting a control signal to each lighting load 2. The communication between the control unit 13 and each lighting load 2 may be wired communication or wireless communication, and the communication standard is not particularly limited.

[0040] The control unit 13 controls one or more lighting loads 2 to emit light of the chromaticity determined by the processing unit 12. In the embodiment, the control unit 13 adjusts the chromaticity for each lighting load 2 by controlling the current flowing through each of the three or more light sources 20. Specifically, the control unit 13 controls the current flowing through each of the first light source 21, the second light source 22, and the third light source 23, thereby controlling the light output of the first light source 21, the light output of the second light source 22, and the light output of the third light source 23. In this way, the control unit 13 adjusts the degree of mixing of red light, green light, and blue light, thereby adjusting the chromaticity of the light emitted from each lighting load 2.

[0041] The storage unit 14 is a storage device that stores information (such as computer programs) required for the processing unit 12 and the control unit 13 to execute their respective processes. The storage unit 14 is realized, for example, by a HDD (Hard Disk Drive), but may also be realized by a semiconductor memory, and is not particularly limited and any known means for storing electronic information can be used. In the embodiment, the storage unit 14 stores data linking the irradiation conditions, chromaticity, and the current value of the current flowing through each light source 20.

[0042] The acquisition unit 11, the processing unit 12, the control unit 13, and the storage unit 14 may all be mounted on the same board or housed in the same housing. The board or housing may be attached to the ceiling, wall, floor, or fixture or furniture such as a desk of the space Sp1. In this case, the lighting control system 100 is preferably miniaturized.

[0043] [Operation] An example of the operation of lighting control system 100 according to an embodiment will now be described with reference to Fig. 6. Fig. 6 is a flowchart showing an example of the operation of lighting control system 100 according to an embodiment.

[0044] First, the acquisition unit 11 acquires the irradiation conditions (S1). As already described, in the embodiment, the acquisition unit 11 acquires the irradiation conditions based on the information input by the user at the input terminal 3.

[0045] Next, the processing unit 12 determines a chromaticity according to the irradiation conditions acquired by the acquisition unit 11 (S2). As already described, the processing unit 12 reads and determines a chromaticity according to the irradiation conditions by comparing data stored in advance in the storage unit 14 with the irradiation conditions acquired by the acquisition unit 11. When the irradiation conditions are information indicating an irradiated object, the processing unit 12 determines a chromaticity according to the irradiated object from any one of the above-mentioned reference range A0, the first range A1, the second range A2, and the third range A3.

[0046] Then, the control unit 13 controls one or more lighting loads 2 to emit light of the chromaticity determined by the processing unit 12 (S3). As already described, in the embodiment, the control unit 13 adjusts the chromaticity of light emitted from each lighting load 2 by controlling the current flowing through each of the three or more light sources 20 for each lighting load 2.

[0047] Thereafter, the control unit 13 maintains control of each lighting load 2 until the acquisition unit 11 acquires another illumination condition or until the operation of the lighting control system 100 ends. When the acquisition unit 11 acquires another illumination condition, the lighting control system 100 executes steps S2 and S3 again.

[0048] [advantage] The advantages of the lighting control system 100 according to the embodiment will be described below. For example, in the lighting control device disclosed in Patent Document 1, the user needs to select a chromaticity that is considered to match the user's desired conditions from a plurality of chromaticities displayed on a graphical user interface. In this lighting control device, the user must visually check whether the chromaticity selected by the user matches the user's desired conditions by controlling the lighting fixture with the chromaticity actually selected. For this reason, this lighting control device has a problem in that the user must go through a process of trial and error to select a chromaticity that matches the user's desired conditions.

[0049] In contrast, the lighting control system 100 according to the embodiment controls one or more lighting loads 2 to emit light of a chromaticity according to the illumination conditions desired by the user, so that the user does not have to directly select a chromaticity that matches the desired conditions.

[0050] In other words, the lighting control system 100 according to the embodiment has an advantage that it is easy to provide a lighting environment suitable for conditions selected by the user. And, the lighting control system 100 according to the embodiment has an advantage that the user can easily select a lighting environment suitable for the conditions desired by the user without needing special knowledge about lighting.

[0051] (Modification) Although the embodiment has been described above, the present invention is not limited to the above embodiment. Modifications of the embodiment will be listed below. The modifications described below may be combined as appropriate.

[0052] In the above embodiment, the acquisition unit 11 may acquire the irradiation conditions based on information indicating a first category of the irradiation conditions and information indicating a second category indicating a condition more detailed than the first category of the irradiation conditions, which are input by the user via the input terminal 3. That is, the irradiation conditions may have a plurality of categories.

[0053] For example, the irradiation conditions may include a first category indicating the type of the irradiated object and a second category indicating the details of the irradiated object. In the input terminal 3, for example, when a user inputs the first category of the irradiation conditions (here, the type of the irradiated object), a screen for inputting the second category (here, the details of the irradiated object) corresponding to the input type of the irradiated object is displayed on the display 30. The details of the irradiated object may include, for example, a specific name, texture, or color of the irradiated object.

[0054] FIG. 7 is a schematic diagram showing an example of input on the input terminal 3 in the lighting control system 100 according to the modified embodiment. For example, as shown in FIG. 7(a), when the user selects "vegetables" as the object to be irradiated, the display 30 may display a screen for inputting the color or illuminance of the vegetable as shown in FIG. 7(b). In this case, the user can select the color or illuminance of the vegetable by operating a slider displayed on the display 30. The acquisition unit 11 can acquire the irradiation conditions including information indicating that the object to be irradiated is a vegetable and information indicating the color or illuminance of the vegetable.

[0055] Also, for example, when the user selects "vegetables" as the object to be irradiated as shown in (a) of Fig. 7, the display 30 may display a screen for selecting a more detailed type of vegetable as shown in (c) of Fig. 7. In this case, the user can select a more detailed type of vegetable by selecting one of a plurality of options displayed on the display 30. Then, the acquisition unit 11 can acquire the irradiation conditions including information indicating that the object to be irradiated is a vegetable and information indicating the type of vegetable.

[0056] In this way, when the illumination conditions have multiple categories, the illumination conditions can be determined in more detail, which has the advantage of making it easier to provide a lighting environment that meets the user's wishes.

[0057] In the above embodiment, the input of the illumination conditions at the input terminal 3 may be performed by, for example, the user inputting a word or character string related to the illumination conditions. In this case, the acquisition unit 11 can acquire the illumination conditions by, for example, recognizing the word or character string input at the input terminal 3 using an appropriate language recognition algorithm.

[0058] Furthermore, the illumination conditions may be input to the input terminal 3 by, for example, the user vocalizing a word or character string related to the illumination conditions. This point will be described below with reference to FIG. 8. FIG. 8 is a block diagram showing the functional configuration of a lighting control system 100 according to another modified example of the embodiment. In this modified example, as shown in FIG. 8, the input terminal 3 further includes a microphone 31. Note that the functional configuration of the lighting control system 100 is the same as that of the embodiment, and therefore will not be described here.

[0059] In this case, the acquisition unit 11 acquires the irradiation conditions based on the user's voice collected by the microphone 31. Specifically, the acquisition unit 11 acquires the user's voice collected by the microphone 31, and recognizes the acquired user's voice by an appropriate voice recognition algorithm, thereby acquiring the irradiation conditions.

[0060] The acquisition unit 11 may also acquire the irradiation conditions based on, for example, an image of an irradiated object. In this case, the acquisition unit 11 acquires an image captured by, for example, an imaging device, and recognizes the acquired image by an appropriate image recognition algorithm, thereby identifying the irradiated object shown in the image and acquiring it as the irradiation conditions.

[0061] The acquisition unit 11 may also acquire the irradiation conditions based on, for example, information indicating the color of the irradiated object. In this case, the acquisition unit 11 acquires information indicating the color of the irradiated object detected by, for example, a color sensor, and analyzes the acquired information by an appropriate analysis algorithm, thereby identifying a characteristic color of the irradiated object (for example, a color that occupies a large part of the irradiated object) and acquiring it as the irradiation condition.

[0062] The acquisition unit 11 may also acquire the irradiation conditions based on, for example, the spectral reflectance of the irradiated object. In this case, the acquisition unit 11 acquires an image of the irradiated object captured in a state where it is irradiated with red light, an image of the irradiated object captured in a state where it is irradiated with green light, and an image of the irradiated object captured in a state where it is irradiated with blue light, and can estimate the spectral reflectance of the irradiated object from these acquired images using an appropriate estimation algorithm to acquire it as the irradiation conditions.

[0063] Furthermore, in the above-described embodiment, the processing unit 12 may be configured to determine one chromaticity from a plurality of discrete chromaticities, as shown in Fig. 9, and control the lighting load 2 to emit light of the determined chromaticity. Fig. 9 is an explanatory diagram of a method of determining a chromaticity in a lighting control system 100 according to yet another modified example of the embodiment. Fig. 9(a) shows an overview of a plurality of discrete chromaticities, and Fig. 9(b) shows an example of a chromaticity that can be determined by the processing unit 12. "X" in the CIExy chromaticity diagram shown in Fig. 9(b) represents a chromaticity that can be determined by the processing unit 12.

[0064] In this configuration, if there is no chromaticity that matches the chromaticity corresponding to the illumination condition acquired by the acquisition unit 11 among the multiple chromaticities, the processing unit 12 may determine the chromaticity that has the smallest color difference with the chromaticity corresponding to the illumination condition among the multiple chromaticities as the chromaticity corresponding to the illumination condition. For example, in (b) of Fig. 9, the coordinate P10 is an xy coordinate indicating the chromaticity corresponding to the illumination condition acquired by the acquisition unit 11. In this case, the processing unit 12 selects the coordinate closest to the coordinate P11 among multiple (here, four) xy coordinates P11, P12, P13, and P14 in the vicinity of the coordinate P10.

[0065] For example, assume that the chromaticity corresponding to the illuminated condition acquired by the acquisition unit 11 is included in a range surrounded by six points whose xy coordinates in the CIExy chromaticity diagram are (0.3587, 0.3176), (0.3517, 0.3131), (0.3465, 0.3027), (0.3483, 0.2970), (0.3553, 0.3015), and (0.3606, 0.3119). In this case, the processing unit 12 determines, among the multiple chromaticities, the chromaticity having the smallest color difference between the illuminated condition and the chromaticity corresponding to the illuminated condition within the range in the CIExy chromaticity diagram as the chromaticity corresponding to the illuminated condition.

[0066] Also, for example, it is assumed that the chromaticity corresponding to the illuminated condition acquired by the acquisition unit 11 is included in a range surrounded by six points whose xy coordinates in the CIExy chromaticity diagram are (0.3878, 0.3306), (0.3808, 0.3261), (0.3756, 0.3157), (0.3774, 0.3100), (0.3844, 0.3145), and (0.3897, 0.3249). In this case, the processing unit 12 determines, among the multiple chromaticities, the chromaticity having the smallest color difference between the illuminated condition and the chromaticity corresponding to the illuminated condition within the range in the CIExy chromaticity diagram as the chromaticity corresponding to the illuminated condition.

[0067] Also, for example, it is assumed that the chromaticity corresponding to the illumination condition acquired by the acquisition unit 11 is included in a range surrounded by six points whose xy coordinates in the CIExy chromaticity diagram are (0.3789, 0.3410), (0.3719, 0.3365), (0.3667, 0.3261), (0.3685, 0.3203), (0.3755, 0.3249), and (0.3808, 0.3353). In this case, the processing unit 12 determines, among the multiple chromaticities, the chromaticity that has the smallest color difference between the chromaticity corresponding to the illumination condition and the chromaticity corresponding to the illumination condition within the range in the CIExy chromaticity diagram, as the chromaticity corresponding to the illumination condition.

[0068] Also, for example, it is assumed that the chromaticity corresponding to the illumination condition acquired by the acquisition unit 11 is included in a range surrounded by six points whose xy coordinates in the CIExy chromaticity diagram are (0.4581, 0.4111), (0.4511, 0.4066), (0.4459, 0.3962), (0.4477, 0.3905), (0.4571, 0.3950), and (0.4600, 0.4054). In this case, the processing unit 12 determines, among the multiple chromaticities, the chromaticity that has the smallest color difference between the chromaticity corresponding to the illumination condition and the chromaticity corresponding to the illumination condition within the range in the CIExy chromaticity diagram, as the chromaticity corresponding to the illumination condition.

[0069] Furthermore, for example, the processing unit 12 may display, on the display 30 of the input terminal 3, among the multiple chromaticities, multiple chromaticity options having small color differences from the chromaticities corresponding to the illumination conditions acquired by the acquisition unit 11. In this case, the processing unit 12 may determine, among the multiple chromaticity options, the chromaticity selected by the user on the input terminal 3 as the chromaticity corresponding to the illumination conditions. At this time, when the user first selects a chromaticity on the input terminal 3, the processing unit 12 may provisionally determine the chromaticity as the chromaticity corresponding to the illumination conditions, and when the same chromaticity is selected again by the user after checking the actual lighting environment, the processing unit 12 may officially determine the chromaticity as the chromaticity corresponding to the illumination conditions.

[0070] In the above embodiment, one or more lighting loads 2 may include three or more light sources each emitting light of a different color. For example, each lighting load 2 may include a light source emitting red light, a light source emitting green light, a light source emitting blue light, and a light source emitting white light. Also, for example, each lighting load 2 may include a light source emitting red light, a light source emitting green light, a light source emitting blue light, and a light source emitting yellow light.

[0071] In the above embodiment, the processing unit 12 may further determine not only the chromaticity according to the illumination conditions but also the light output (dimming rate) according to the illumination conditions. In this case, the control unit 13 may control one or more lighting loads 2 so that light of the chromaticity and light output determined by the processing unit 12 is emitted.

[0072] In the embodiment, the one or more lighting loads 2 are not included in the components of the lighting control system 100, but the one or more lighting loads 2 may be included in the components of the lighting control system 100.

[0073] Also, for example, in the above embodiment, lighting control system 100 is realized by a single device, but it may be realized by multiple devices. When lighting control system 100 is realized by multiple devices, the components of lighting control system 100 may be distributed in any way among the multiple devices. For example, in the above embodiment, lighting control system 100 may be provided in a server device, or in an information terminal installed in a closed space. That is, the present invention may be realized by cloud computing or edge computing.

[0074] For example, the method of communication between the devices in the above-described embodiment is not particularly limited. Also, a relay device (not shown) may be involved in the communication between the devices.

[0075] In the above embodiment, each component may be realized by executing a software program suitable for each component. Each component may be realized by a program execution unit such as a CPU or a processor reading and executing a software program recorded on a recording medium such as a hard disk or a semiconductor memory.

[0076] Furthermore, each component may be realized by hardware. For example, each component may be a circuit (or an integrated circuit). These circuits may form a single circuit as a whole, or each may be a separate circuit. Furthermore, each of these circuits may be a general-purpose circuit, or a dedicated circuit.

[0077] Furthermore, the general or specific aspects of the present invention may be realized as a system, an apparatus, a method, an integrated circuit, a computer program, or a computer-readable recording medium such as a CD-ROM, or may be realized as any combination of a system, an apparatus, a method, an integrated circuit, a computer program, and a recording medium.

[0078] For example, the present invention may be realized as a lighting control method executed by a computer such as the lighting control system 100, or as a program for causing a computer to execute such a lighting control method, or as a computer-readable non-transitory recording medium on which such a program is recorded.

[0079] In addition, the present invention also includes forms obtained by applying various modifications to each embodiment that a person skilled in the art may think of, or forms realized by arbitrarily combining the components and functions of each embodiment within the scope that does not deviate from the spirit of the present invention.

[0080] (summary) As described above, the lighting control system 100 according to the first aspect includes an acquisition unit 11, a processing unit 12, and a control unit 13. The acquisition unit 11 acquires illumination conditions in a space Sp1 in which light is emitted from one or more lighting loads 2 having three or more light sources 20 that emit light of different colors. The processing unit 12 determines a chromaticity according to the illumination conditions acquired by the acquisition unit 11. The control unit 13 controls the one or more lighting loads 2 to emit light of the chromaticity determined by the processing unit 12.

[0081] Such a lighting control system 100 has the advantage of easily providing a lighting environment suited to conditions selected by the user.

[0082] In addition, in the lighting control system 100 of the second aspect, in the first aspect, the three or more light sources 20 include a first light source 21 that emits red light, a second light source 22 that emits green light, and a third light source 23 that emits blue light.

[0083] Such a lighting control system 100 has the advantage that it can emit light that is a mixture of the three primary colors of red, green, and blue into the space Sp1, making it easier to provide a lighting environment that suits the conditions selected by the user.

[0084] Moreover, in the lighting control system 100 according to the third aspect, in the first or second aspect, the control unit 13 adjusts the chromaticity by controlling the current flowing through each of the three or more light sources 20.

[0085] Such a lighting control system 100 has the advantage that the chromaticity of each light source 20 can be finely adjusted, compared to when each light source 20 is switched on and off, making it easier to provide a lighting environment that is more suited to the conditions selected by the user.

[0086] In addition, in the lighting control system 100 according to the fourth aspect, in any one of the first to third aspects, the illumination condition is information indicating an illuminated object to be illuminated with light from one or more lighting loads 2 in the space Sp1.

[0087] Such lighting control system 100 has an advantage in that it is easy to provide a lighting environment suitable for an object to be illuminated selected by a user.

[0088] In the lighting control system 100 according to the fifth aspect, in the fourth aspect, the processing unit 12 determines a chromaticity according to the irradiated object from a reference range A0 including four ranges, a first range B1, a second range B2, a third range B3, and a fourth range B4 in the CIExy chromaticity diagram. The first range B1 is the reference range when the irradiated object is fish, the second range B2 is the reference range when the irradiated object is meat, the third range B3 is the reference range when the irradiated object is vegetables, and the fourth range B4 is the reference range when the irradiated object is bread or a side dish.

[0089] Such lighting control system 100 has the advantage that when the object to be illuminated selected by the user is fish, meat, vegetables, bread, or side dishes, it becomes easier to provide a lighting environment suitable for the object to be illuminated.

[0090] In addition, in the lighting control system 100 of the sixth aspect, in the fifth aspect, the processing unit 12 determines a chromaticity corresponding to the irradiated object from a triangular first reference range A1 that includes a first range B1, a second range B2, a third range B3, and a fourth range B4 of the reference range A0 and has an area of ​​0.02858 or more.

[0091] Such lighting control system 100 has the advantage that when the object to be illuminated selected by the user is fish, meat, vegetables, bread, or side dishes, it becomes easier to provide a lighting environment suitable for the object to be illuminated.

[0092] In addition, in the lighting control system 100 of the seventh aspect, in the fifth aspect, the processing unit 12 determines a chromaticity corresponding to the irradiated object from a triangular second reference range A2 that includes the first range B1, the second range B2, the third range B3, and the fourth range B4 of the reference range A0 and has an area of ​​0.00337 or more and less than 0.02858.

[0093] Such lighting control system 100 has the advantage that when the object to be illuminated selected by the user is fish, meat, vegetables, bread, or side dishes, it becomes easier to provide a lighting environment suitable for the object to be illuminated.

[0094] In addition, in the lighting control system 100 according to the eighth aspect, in the fifth aspect, the processing unit 12 calculates the area of ​​the reference range A0 as 4.1608×10 -4 From the above rectangular third reference range A3, a chromaticity according to the object to be illuminated is determined.

[0095] Such lighting control system 100 has the advantage that when the object to be illuminated selected by the user is fish, meat, vegetables, bread, or side dishes, it becomes easier to provide a lighting environment suitable for the object to be illuminated.

[0096] In addition, in the lighting control system 100 according to a ninth aspect, in any one of the first to third aspects, the illumination condition is information indicating the usage manner of the space Sp1.

[0097] Such lighting control system 100 has the advantage of easily providing a lighting environment suited to the usage mode of the space Sp1 selected by the user.

[0098] In addition, in the lighting control system 100 according to a tenth aspect, in any one of the first to third aspects, the illumination condition is information indicating a user's use in the space Sp1, or information indicating the atmosphere of the space Sp1.

[0099] Such lighting control system 100 has an advantage in that it is easy to provide a lighting environment suitable for the user's purpose in the space Sp1 selected by the user or suitable for the atmosphere of the space Sp1.

[0100] In addition, in the lighting control system 100 according to an eleventh aspect, in any one of the first to tenth aspects, the acquisition unit 11 acquires illumination conditions based on information input by a user via the input terminal 3.

[0101] According to such lighting control system 100, since the illumination conditions are acquired based on the information input by the user, there is an advantage that the illumination conditions selected by the user can be easily and accurately acquired.

[0102] In addition, in the lighting control system 100 of the 12th aspect, in the 11th aspect, the acquisition unit 11 acquires the illumination conditions based on information indicating a first category of the illumination conditions input by a user at the input terminal 3 and information indicating a second category of the illumination conditions that indicates more detailed conditions than the first category of the illumination conditions.

[0103] According to such a lighting control system 100, the illumination conditions are acquired based on the details of the illumination conditions input by the user, which has the advantage that the illumination conditions selected by the user can be acquired more accurately.

[0104] In addition, in the lighting control system 100 according to a thirteenth aspect, in any one of the first to tenth aspects, the acquisition unit 11 acquires the illumination condition based on the user's voice picked up by a microphone.

[0105] According to such lighting control system 100, since the illumination conditions are acquired based on the voice uttered by the user, there is an advantage that the illumination conditions selected by the user can be easily and accurately acquired.

[0106] In addition, in a lighting control method according to a fourteenth aspect, illumination conditions in a space Sp1 in which light is emitted from one or more lighting loads 2 having three or more light sources 20 that emit light of different colors are acquired (S1). In addition, in the lighting control method, a chromaticity according to the acquired illumination conditions is determined (S2). In addition, in the lighting control method, one or more lighting loads 2 are controlled to emit light of the determined chromaticity (S3).

[0107] Such a lighting control method has the advantage that it is easy to provide a lighting environment suited to the conditions selected by the user.

[0108] A program according to a fifteenth aspect causes one or more processors to execute the lighting control method according to the fourteenth aspect.

[0109] Such a program has the advantage of making it easier to provide a lighting environment suited to the conditions selected by the user. [Explanation of symbols]

[0110] 100 Lighting Control System 11 Acquisition Department 12 Processing section 13 Control section 2 Lighting load 20 light source 21 1st light source 22 Second light source 23 Third light source 3 Input terminal 31 Microphone A0 Reference Range A1 First reference range A2 Second reference range A3 Third reference range B1 1st range B2 2nd range B3 3rd range B4 4th range Sp1 space

Claims

1. An acquisition unit that acquires the irradiation conditions in a space where light is emitted from one or more lighting loads having three or more light sources that emit light of different colors from each other, A processing unit that determines the chromaticity according to the irradiation conditions acquired by the acquisition unit, The system includes a control unit that controls the one or more lighting loads to emit light of the chromaticity determined by the processing unit, Lighting control system.

2. The three or more light sources include a first light source that emits red light, a second light source that emits green light, and a third light source that emits blue light. The lighting control system according to claim 1.

3. The control unit adjusts the chromaticity by controlling the current flowing through each of the three or more light sources. The lighting control system according to claim 1 or 2.

4. The aforementioned irradiation conditions are information indicating an object to be irradiated with light from one or more illumination loads in the space. The lighting control system according to claim 1 or 2.

5. The processing unit determines the chromaticity corresponding to the irradiated object from a reference range that includes four ranges in the CIExy chromaticity diagram: the first range, the second range, the third range, and the fourth range. The first range is a reference range when the irradiated object is a fish, The second range is a reference range when the irradiated object is meat, The third range is a reference range when the irradiated object is a vegetable. The fourth range is a reference range when the irradiated object is bread or prepared food. The lighting control system according to claim 4.

6. The processing unit determines the chromaticity corresponding to the irradiated object from a first triangular reference range that includes the first, second, third, and fourth reference ranges among the reference ranges and has an area of ​​0.02858 or more. The lighting control system according to claim 5.

7. The processing unit determines the chromaticity corresponding to the irradiated object from a second triangular reference range which includes the first, second, third, and fourth reference ranges of the reference range and has an area of ​​0.00337 or more and less than 0.02858. The lighting control system according to claim 5.

8. The processing unit determines the chromaticity corresponding to the irradiated object from a third rectangular reference range within the reference range, where the area is 4.1608 × 10⁻⁴ or more. The lighting control system according to claim 5.

9. The aforementioned irradiation conditions are information indicating the manner in which the space is used. The lighting control system according to claim 1 or 2.

10. The aforementioned irradiation conditions are information indicating the user's intended use in the space, or information indicating the atmosphere of the space. The lighting control system according to claim 1 or 2.

11. The acquisition unit acquires the irradiation conditions based on the information entered by the user at the input terminal. The lighting control system according to claim 1 or 2.

12. The acquisition unit acquires the irradiation conditions based on information indicating a first category of the irradiation conditions, or information indicating a second category that indicates conditions more detailed than the first category of the irradiation conditions, which is input by the user at the input terminal. The lighting control system according to claim 11.

13. The acquisition unit acquires the irradiation conditions based on the user's voice picked up by the microphone. The lighting control system according to claim 1 or 2.

14. The processing unit determines one chromaticity from a plurality of discrete chromaticities based on information indicating a first category of the irradiation conditions, or information indicating a second category that indicates conditions more detailed than the first category of the irradiation conditions. The lighting control system according to claim 1 or 2.

15. The acquisition unit acquires the irradiation conditions, which are information indicating an object to be irradiated by light from one or more lighting loads in the space, based on information indicating a first category of the irradiation conditions, or information indicating a second category indicating conditions more detailed than the first category of the irradiation conditions, which are input by the user at the input terminal. The processing unit determines one chromaticity from a plurality of discrete chromaticities included in the reference range of the CIExy chromaticity diagram corresponding to the type of irradiated object indicated in the irradiated conditions acquired by the acquisition unit. The lighting control system according to claim 1 or 2.

16. The processing unit displays a plurality of discrete chromaticity options included in the reference range of the CIExy chromaticity diagram on the input terminal, and determines the chromaticity selected by the user on the input terminal from among the plurality of chromaticity options displayed as the chromaticity corresponding to the irradiation conditions. The lighting control system according to claim 15.

17. Obtain the irradiation conditions in a space where light is emitted from one or more illumination loads having three or more light sources that emit light of different colors from each other. Determine the chromaticity according to the acquired irradiation conditions, Control the one or more lighting loads so that they emit light of the determined chromaticity. Lighting control method.

18. One or more processors, To execute the lighting control method described in claim 17, program.

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