Lighting control systems, lighting fixtures, and control devices

Abstract

To provide a lighting control system, a lighting fixture, and a control device that allow a user to correct the light color of the lighting fixture.SOLUTION: A lighting control system according to the present disclosure includes a lighting fixture that has a plurality of light sources with different light colors, and in which the plurality of light sources light at a dimming level according to a set value, a measuring device that measures the chromaticity and illuminance of the light emitted by the lighting fixture, and an information terminal that corrects the setting value on the basis of the setting value and the measured values of the chromaticity and illuminance measured by the measuring device such that the light emitted by the lighting fixture approaches the target chromaticity.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present disclosure relates to a lighting control system, a lighting fixture, and a control device.

Background Art

[0002] Patent Document 1 discloses a lighting control device that performs color adjustment for adjusting the correlated color temperature of a lighting load provided in a predetermined space and dimming for adjusting the illuminance of the predetermined space by making the light output of the lighting load variable. In this lighting control device, in a first time period from a predetermined time in the morning to around noon, the correlated color temperature of the lighting load is adjusted to a first correlated color temperature, and the illuminance of the predetermined space is adjusted to a first illuminance. Further, in a second time period in the afternoon set after the first time period, the correlated color temperature of the lighting load is decreased as time elapses from the first correlated color temperature to a second correlated color temperature, and the illuminance of the predetermined space is decreased as time elapses from the first illuminance to a second illuminance.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] As shown in Patent Document 1, a lighting system has been devised that generates a light environment favorable for the human biological rhythm such as the circadian rhythm throughout the day. In such a lighting system, color adjustment and dimming are performed by increasing or decreasing the light emission amounts of a plurality of types of LED elements having different correlated color temperatures from each other.

[0005] However, with LEDs, the luminous flux may decrease or the chromaticity may change with cumulative usage time. Furthermore, the rate of decrease in luminous flux and the amount of change in chromaticity are generally not uniform, and vary depending on the LED structure, the LED's light color, and the operating temperature conditions. Therefore, the more colors a light source emits, the more difficult it is to maintain its initial characteristics.

[0006] Cornice lighting illuminates surfaces such as walls with indirect light, creating a sophisticated atmosphere with soft light gradations. Cornice lighting often involves connecting multiple light fixtures. When multiple light fixtures are installed in this way, individual differences in the light emission of each fixture are likely to be noticeable to the user. For example, differences in light emission are more likely to occur if the installation dates or usage frequencies of the multiple light fixtures differ.

[0007] This disclosure was made to solve the aforementioned problems and aims to provide a lighting control system, lighting fixture, and control device that allow users to correct the light color of the lighting fixture. [Means for solving the problem]

[0008] The lighting control system related to this disclosure is The device comprises a first light source unit having a plurality of first light sources of different colors, wherein the plurality of first light sources are illuminated at a dimming level corresponding to a first set value, and a second light source unit having a plurality of second light sources of different colors, wherein the plurality of second light sources are illuminated at a dimming level corresponding to a second set value. A lighting fixture, a measuring instrument for measuring the chromaticity and illuminance of the light emitted by the lighting fixture, and the 1 Set value and With the second light source unit turned off From the measured values ​​of chromaticity and illuminance measured by the measuring instrument, 1st light source section The light emitted by is brought closer to the target chromaticity. 1 It includes an information terminal for correcting set values. The lighting control system according to this disclosure comprises a lighting fixture having a plurality of light sources of different colors, wherein the plurality of light sources are lit at a dimming level according to a set value; a measuring instrument for measuring the chromaticity and illuminance of the light emitted by the lighting fixture; and an information terminal that corrects the set value to bring the light emitted by the lighting fixture closer to a target chromaticity, based on the set value and the measured values ​​of chromaticity and illuminance measured by the measuring instrument, wherein the information terminal sequentially lights up the plurality of light sources for each of the light colors, obtains the measured values ​​of chromaticity and illuminance for each of the plurality of light sources, and corrects the set value to bring the light emitted by the lighting fixture closer to the target chromaticity, based on the set value and the measured values ​​for each of the plurality of light sources.

[0009] The lighting fixtures related to this disclosure are A first light source unit having a plurality of first light sources of different colors, wherein the plurality of first light sources are illuminated at a dimming level corresponding to a first set value; a second light source unit having a plurality of second light sources of different colors, wherein the plurality of second light sources are illuminated at a dimming level corresponding to a second set value; and the first light source unit and the second light source unit are controlled by the first set value and the second set value, respectively. A lighting control unit that turns on the lights at a dimming level corresponding to the and the 1 The setting value is sent to the information terminal, 1 The set value and, Measurements were taken with the second light source unit turned off. The aforementioned 1 Based on the measured values ​​of chromaticity and illuminance of the light emitted by the light source, 1 The light emitted by the light source unit is brought closer to the target chromaticity. 1A communication unit that receives correction information for the set value from the information terminal

[0010] The control device according to the present disclosure The device comprises: a first light source unit having a plurality of first light sources of different colors, wherein the plurality of first light sources are illuminated at a dimming level corresponding to a first set value; and a second light source unit having a plurality of second light sources of different colors, wherein the plurality of second light sources are illuminated at a dimming level corresponding to a second set value. Of the lighting fixture The First Set value Obtain , Measurements were taken with the second light source unit turned off. The 1st light source section Measured values of the chromaticity and illuminance of the light emitted by The first set value and the measured value are obtained and From, the 1st light source section The light emitted by is made to approach the target chromaticity 1 The set value is corrected

Effect of the Invention

[0011] In the lighting control system, lighting fixture, and control device according to the present disclosure, the set value of the dimming level of the lighting fixture and the measured values of the chromaticity and illuminance of the light emitted by the lighting fixture are used to correct the set value so that the light emitted by the lighting fixture approaches the target chromaticity. Therefore, it becomes possible to correct the light color of the lighting fixture

Brief Description of the Drawings

[0012] [Figure 1] It is a diagram for explaining the lighting control system according to Embodiment 1 [Figure 2] It is a block diagram showing the configuration of the lighting control system according to Embodiment 1 [Figure 3] It is a perspective view of the lighting fixture according to Embodiment 1 [Figure 4] It is a diagram showing a display example of the information terminal according to Embodiment 1<00​​​​​​​​​​​​​​​ [Figure 10] It is a perspective view of a lighting fixture according to Embodiment 2. [Figure 11] It is a cross-sectional view of a lighting fixture according to Embodiment 2. [Figure 12] It is a diagram showing a flow of light color correction in the lighting control system according to Embodiment 1.

Embodiments for Carrying Out the Invention

[0013] The lighting control system, lighting fixture, and control device according to each embodiment will be described with reference to the drawings. The same or corresponding components are denoted by the same reference numerals, and the repeated description may be omitted. The sizes, positional relationships, etc. of the members shown in each drawing may be exaggerated for clarity of explanation.

[0014] Embodiment 1. FIG. 1 is a diagram for explaining a lighting control system 100 according to Embodiment 1. The lighting control system 100 includes a lighting fixture 50, a measuring device 80, and an information terminal 10. The lighting space illuminated by the lighting fixture 50 is, for example, an office work area, a conference room, or a refresh space. The lighting space may be an elderly welfare facility, a hospital, or a general residence. The lighting fixture 50 included in the lighting control system 100 may be one or more.

[0015] FIG. 2 is a block diagram showing the configuration of the lighting control system 100 according to Embodiment 1. First, the lighting fixture 50 will be described. The lighting fixture 50 includes a control unit 20, a lighting circuit 30, and a light source unit 40. The lighting fixture 50 is, for example, a base light attached to the ceiling of a space to illuminate the space. The light source unit 40 has a plurality of light sources 40a, 40b with different light colors. The light sources 40a, 40b are, for example, LEDs with different color temperatures. The lighting circuit 30 is, for example, a power supply circuit that supplies a constant current corresponding to the dimming level to each of the plurality of light sources 40a, 40b to light the plurality of light sources 40a, 40b. The lighting circuit 30 is, for example, a switching circuit. The control unit 20 controls the lighting circuit 30 so that the plurality of light sources 40a, 40b are lit at a dimming level according to a set value.

[0016] The control unit 20 comprises a communication unit 21, a lighting control unit 22, and a storage unit 23. The communication unit 21 transmits the set values ​​of the dimming levels of the multiple light sources 40a and 40b to the information terminal 10. The communication unit 21 also receives the corrected set values, which will be described later, from the information terminal 10. The lighting control unit 22 stores the received set values ​​in the storage unit 23. The lighting control unit 22 illuminates the multiple light sources 40a and 40b at dimming levels corresponding to the set values.

[0017] The lighting control unit 22 is implemented by, for example, a processor, a microcomputer, or a dedicated circuit. The memory unit 23 stores the control program and setting values ​​executed by the lighting control unit 22. The memory unit 23 is, for example, a semiconductor memory such as a non-volatile memory.

[0018] Figure 3 is a perspective view of the lighting fixture 50 according to Embodiment 1. Figure 3 shows the lighting fixture 50 according to Embodiment 1 with the cover removed. Figures 2 and 3 show two types of light sources 40a and 40b, but the light source unit 40 may have three or more light sources with different light colors. Each of the light sources 40a and 40b is, for example, an SMD (Surface Mount Device) type light-emitting module using an LED as a light-emitting element. Each of the light sources 40a and 40b may also be a COB (Chip On Board) type light-emitting module. As shown in Figure 3, the lighting fixture 50 is, for example, circular in plan view. However, the lighting fixture 50 is not limited to this and may be rectangular in plan view. The lighting fixture 50 may be a ceiling light, a downlight, or a spotlight.

[0019] Next, the measuring instrument 80 will be described. The measuring instrument 80 measures the chromaticity and illuminance of the light emitted by the lighting fixture 50. The measuring instrument 80 is also called a colorimeter. As shown in Figure 1, the measuring instrument 80 measures the chromaticity and illuminance with, for example, the light receiving unit 81 positioned directly below the lighting fixture 50. The measuring instrument 80 may communicate with the information terminal 10 via Bluetooth® or the like. The measured values ​​from the measuring instrument 80 are transmitted to the information terminal 10. The information terminal 10 may also perform the role of the measuring instrument 80.

[0020] Next, the information terminal 10 will be described. The information terminal 10 is a control device that corrects the set value so that the light emitted by the lighting fixture 50 approaches the target chromaticity, based on the set value received from the lighting fixture 50 and the chromaticity and illuminance measurements taken by the measuring instrument 80. Alternatively, the information terminal 10 may also correct the set value so that the light emitted by the lighting fixture 50 approaches the target illuminance, based on the set value received from the lighting fixture 50 and the chromaticity and illuminance measurements taken by the measuring instrument 80.

[0021] The information terminal 10 is, for example, a battery-powered smartphone. The functions of the information terminal 10 are realized by installing a dedicated application on a general-purpose device such as a smartphone or tablet. The information terminal 10 may also be a device operated by a facility manager or other person to maintain the lighting fixture 50 when the lighting fixture 50 is installed in an office. The information terminal 10 may also be a dedicated device for a lighting fixture maintenance system. The information terminal 10 may also be a control unit incorporated into the lighting fixture 50.

[0022] The information terminal 10 includes, for example, an operation reception unit 11, a control unit 12, a communication unit 14, a storage unit 15, and a display unit 16. The display unit 16 displays instructions for correcting set values, etc. The operation reception unit 11 accepts user operations based on instructions for correcting set values, for example. The operation reception unit 11 may also accept inputs such as target chromaticity, target illuminance, and measured values ​​from the measuring instrument 80. The operation reception unit 11 is implemented by a touch panel or hardware buttons, etc.

[0023] The communication unit 14 receives set values ​​from the lighting fixture 50. The communication unit 14 also receives chromaticity and illuminance measurements from the measuring instrument 80. The control unit 12 stores the set values ​​and measurements in the storage unit 15. The storage unit 15 also stores the control program executed by the control unit 12. This control program is a program that the control unit 12 uses to correct the set values ​​so that the light emitted by the lighting fixture 50 approaches the target chromaticity, based on the set value of the dimming level of the lighting fixture 50 and the measured values ​​of the chromaticity and illuminance of the light emitted by the lighting fixture 50. When the information terminal 10 is implemented by a general-purpose information terminal such as a smartphone or tablet, a dedicated application for operating the information terminal 10 is installed in the storage unit 15. The storage unit 15 is, for example, a semiconductor memory such as a non-volatile memory.

[0024] The control unit 12 adjusts the dimming level setting of the lighting fixture 50 and the measured values ​​of the chromaticity and illuminance of the light emitted by the lighting fixture 50 to bring the light emitted by the lighting fixture 50 closer to the target chromaticity. The control unit 12 also adjusts the dimming level setting of the lighting fixture 50 and the measured values ​​of the chromaticity and illuminance of the light emitted by the lighting fixture 50 to bring the light emitted by the lighting fixture 50 closer to the target illuminance. The setting value is, for example, the constant current value of each of the light sources 40a and 40b. The setting value may also be the dimming rate of each of the light sources 40a and 40b. The control unit 12 is implemented, for example, by a microcomputer or processor.

[0025] The communication unit 14 transmits correction information for the setting value calculated by the control unit 12 to bring the light emitted by the light source unit 40 closer to the target chromaticity to the communication unit 21. The correction information received by the communication unit 21 of the lighting fixture 50 may be the corrected setting value itself, or it may be the amount of change from the original setting value, etc.

[0026] The communication between the communication unit 14, the lighting fixture 50, and the measuring instrument 80 may be wired or wireless. The communication standard used is also not particularly limited. Furthermore, a server may be interposed between the information terminal 10 and the lighting fixture 50.

[0027] Next, the procedure for correcting the setting values ​​will be explained. Correcting the setting values ​​is performed as part of a support system provided free of charge to users of lighting fixtures 50 by the service provider. The service provider uses pre-registered user information to send official maintenance notices to users at predetermined intervals, such as every three years. If a user replies that they are concerned about the color of the light, the service provider will send a maintenance pack to the user. The maintenance procedure is as follows: First, the service provider provides the user with a measuring instrument 80 (Step 1). The user also installs an application for correcting the setting values ​​on their information terminal 10 (Step 2). Next, the user turns off the lights around the lighting fixture 50 to be corrected and measures the chromaticity and illuminance of the lighting fixture 50 using the measuring instrument 80 (Step 3). Next, the information terminal 10 corrects the setting values ​​using the application (Step 4). After the correction is complete, the user returns the measuring instrument 80 to the service provider (Step 5).

[0028] Figures 4-6 show examples of the display of the information terminal 10 according to Embodiment 1. In Figures 4-6, the display unit 16 of the information terminal 10 displays instructions from an application for correcting the set values. As shown in Figure 4, the information terminal 10 displays the measurement method for chromaticity and illuminance. In this way, the user can correct the set values ​​according to the display of the information terminal 10.

[0029] It is preferable to place the measuring instrument 80 directly below the lighting fixture 50 to be adjusted. The height of the measuring instrument 80 can be arbitrary. On the other hand, the illuminance value changes depending on the distance from the lighting fixture 50. Therefore, if the deviation in brightness is to be corrected in addition to chromaticity, it is preferable to set the distance between the measuring instrument 80 and the lighting fixture 50 to a predetermined distance. In this case, for example, the measuring instrument 80 is placed at a predetermined height such as 1m from the floor and the measurement is performed. Alternatively, in order to correct the brightness, the distance between the measuring instrument 80 and the lighting fixture 50 or the height of the measuring instrument 80 may be input into the information terminal 10. In this case, the user measures the distance between the measuring instrument 80 and the lighting fixture 50 or the height of the measuring instrument 80 and inputs it into the application. This allows the information terminal 10 to calculate the luminous flux from the illuminance.

[0030] Furthermore, when measuring chromaticity and illuminance, it is preferable to block out light from sources other than the luminaire 50 being corrected, as well as ambient light. Typically, multiple luminaires are controlled together as a single block. In order to perform the correction in this embodiment, it is preferable to set each luminaire 50 to be controlled individually.

[0031] The measured values ​​of chromaticity and illuminance may be transmitted from the measuring instrument 80 to the information terminal 10. Alternatively, the user may input the measurement results into the information terminal 10, as shown in Figures 5 and 6. Figure 5 shows the state in which the user has input the measured value of chromaticity before correction into the information terminal 10. Figure 6 shows the state in which the user has input the measured value of chromaticity after correction into the information terminal 10. In addition, the measured values ​​shown by the measuring instrument 80 may be input into the information terminal 10 by the user reading them with the camera of the information terminal 10.

[0032] Figure 7 shows the flow of color correction in the lighting control system 100 according to Embodiment 1. First, the lighting fixture 50 to be corrected is turned on. The dimming level setting value of the lighting fixture 50 is transmitted to the information terminal 10. In addition, the chromaticity and illuminance of the lighting fixture 50 are measured by the measuring instrument 80, and the measured values ​​are transmitted to the information terminal 10. The information terminal 10 calculates a correction value for the setting value from the received setting value and the measured values.

[0033] Here, we will explain how to calculate the correction value. Figure 8 is a diagram illustrating the chromaticity diagram. Let the chromaticity coordinates of light source 40a be (x1, y1) and its brightness be Y1. Let the chromaticity coordinates of light source 40b be (x2, y2) and its brightness be Y2. Also, let the chromaticity coordinates of the mixed color of light sources 40a and 40b, that is, the light emitted by the lighting fixture 50, be (x3, y3) and its brightness be Y3. In this case, x3, y3, and Y3 can be obtained from the following calculation formulas (1) to (3).

[0034]

number

[0035]

number

[0036]

number

[0037] Thus, the chromaticity of the lighting fixture 50 is determined based on the chromaticity and brightness of the light sources 40a and 40b. The correction value for the set value is calculated from the difference between the measured chromaticity and the target chromaticity. When brightness correction is performed, the correction value for the set value is calculated taking into account the difference between the measured illuminance and the target illuminance. The information terminal 10 transmits the calculated correction information to the lighting fixture 50. The lighting fixture 50 lights up the multiple light sources 40a and 40b at a dimming level corresponding to the corrected set value.

[0038] Next, with the lighting fixture 50 illuminated at a dimming level corresponding to the corrected set value, the measuring instrument 80 measures the chromaticity and illuminance again. The measured values ​​are transmitted to the information terminal 10. The information terminal 10 then checks the correction results. For example, if the difference between the corrected measured values ​​and the target chromaticity and target illuminance is smaller than a predetermined value, the information terminal 10 determines that the correction is complete. If the difference is larger than the predetermined value, the information terminal 10 calculates the correction value again and transmits the correction information to the lighting fixture 50. In this way, the correction of the set value is repeated until the correction is determined to be complete.

[0039] Next, the effects of this embodiment will be described. According to this embodiment, it becomes possible to correct the light color of the lighting fixture 50. For example, in support systems such as robotic vacuum cleaners, the vacuum cleaners are sometimes collected by courier and maintenance is performed at the factory. On the other hand, lighting fixtures are installed on the ceilings of buildings, etc., and electrical work is required for installation and removal. Therefore, it is not easy to maintain lighting fixtures at the factory. In contrast, with this embodiment, the light color can be easily corrected by the user. In addition, by proposing maintenance from the business side, complaints from users can be suppressed and customer satisfaction can be improved. Furthermore, since the correction can be performed by the user, maintenance costs can be reduced.

[0040] In this embodiment, an example is shown in which the chromaticity and illuminance of the lighting fixture 50 are corrected using a set value and measured values ​​of chromaticity and illuminance. However, the method is not limited to this; the chromaticity of the lighting fixture 50 may be corrected, but the illuminance may not be corrected. As can be seen from equations (1) to (3), the illuminance changes naturally in conjunction with the correction of chromaticity.

[0041] The information terminal 10 should correct the setting values ​​so that the power consumption of the multiple light sources 40a and 40b after the setting value correction is less than or equal to the value before the setting value correction. The current values ​​of the light sources 40a and 40b are adjusted by correcting the setting values. The setting values ​​should be corrected so that the sum of the power VA obtained by multiplying the current A and voltage V of light source 40a and the power VA obtained by multiplying the current A and voltage V of light source 40b does not exceed the value before correction. Generally, differences in light color are more easily perceived by the human eye than differences in brightness. With such correction, it is possible to suppress power consumption while maintaining the light color at an appropriate value.

[0042] Generally, the brightness of LEDs decreases over time. Therefore, power consumption increases in an attempt to maintain brightness. To account for this decrease in brightness, it is advisable to set the initial power consumption lower than the actual capacity.

[0043] The target chromaticity and target illuminance may be set externally. The target chromaticity and target illuminance may be updated from a server or the like via the communication unit 14. The target chromaticity and target illuminance may also be input by the user via the operation reception unit 11. In addition, the display unit 16 or the like may display options for the target chromaticity and target illuminance, allowing the user to select the target chromaticity and target illuminance.

[0044] In applications like those shown in Figures 4-6, a function may be provided that allows the user to receive assistance from an operator via chat or similar means. Furthermore, this embodiment shows an example where a user performs a correction of the setting values. However, it is not limited to this, and for example, an employee of the business operator may visit the installation site of the lighting fixture 50 and perform the correction of the setting values.

[0045] In this embodiment, the chromaticity and illuminance were measured with all of the multiple light sources 40a and 40b lit. However, the information terminal 10 may also light up the multiple light sources 40a and 40b sequentially according to their light color and obtain the measured values ​​for the chromaticity and illuminance of each of the multiple light sources 40a and 40b. That is, the measurement value may be obtained by lighting up only light source 40a, and then the measurement value may be obtained by lighting up only light source 40b. In this case, the information terminal 10 corrects the set value to bring the light emitted by the lighting fixture 50 closer to the target chromaticity, based on the set value and the measured values ​​for the chromaticity and illuminance of each of the multiple light sources 40a and 40b. Alternatively, the information terminal 10 may also correct the set value to bring the light emitted by the lighting fixture 50 closer to the target illuminance, based on the set value and the measured values ​​for the illuminance of each of the multiple light sources 40a and 40b.

[0046] These modifications can be appropriately applied to the lighting control system, lighting fixtures, and control devices according to the following embodiments. Since the lighting control system, lighting fixtures, and control devices according to the following embodiments share many similarities with Embodiment 1, the explanation will focus on the differences from Embodiment 1.

[0047] Embodiment 2. Figure 9 is a diagram illustrating the lighting control system 200 according to Embodiment 2. In the lighting control system 200, the structure of the lighting fixture 250 differs from that of the lighting control system 100. Figure 10 is a perspective view of the lighting fixture 250 according to Embodiment 2. Figure 11 is a cross-sectional view of the lighting fixture 250 according to Embodiment 2. The light source unit 240 of the lighting fixture 250 illuminates a room by, for example, mimicking the sky. The lighting fixture 250 is also called blue sky lighting. The light source unit 240 has light sources 61 and 62, a light-emitting unit 64, and a frame 70. The light source 61 emits light toward the light-emitting unit 64. The light-emitting unit 64 guides the light incident from the light source 61 by total internal reflection, scatters it, and emits it from the front surface 64a, which is the light-emitting surface.

[0048] The frame 70 has a wall-like portion 73 on the front surface 64a of the light-emitting section 64. The frame 70 is, for example, a light-transmitting member. The frame 70 may also include a light-diffusing material that diffuses light. The frame 70 is formed to enclose the space in front of the front surface 64a. The frame 70 may be inclined with respect to the normal to the front surface 64a such that the space in front of the front surface 64a widens as it moves away from the front surface 64a. The frame 70 is composed of four surfaces, but the number of portions 73 constituting the frame 70 may be other than four surfaces. The frame 70 may also include curved surfaces. The frame 70 only needs to include portions located in the direction of light emission from the light-emitting surface of the light-emitting section 64.

[0049] The light source 61 includes a plurality of first light sources with different light colors. The plurality of first light sources are lit at a dimming level corresponding to a first set value. The light source 61 has, for example, a blue LED, a white LED, and a green LED as first light sources. The light source 61, which causes the light-emitting unit 64 to mimic the sky, changes its luminescence state so that the color of the blue sky changes from sunrise to morning to noon. Specifically, as time passes, the total luminous flux of the three colored LEDs is gradually increased, while the ratio of blue luminous flux decreases and the ratio of green and white luminous flux increases. As a result, the light-emitting unit 64 changes from a deep purplish blue to the color of a daytime blue sky. The light-emitting unit 64 may also mimic a cloudy sky or a sunset. The light source 61 may include an orange LED to represent a sunset.

[0050] The light source 62 includes a plurality of second light sources with different light colors. The plurality of second light sources are illuminated at a dimming level corresponding to a second set value. The light source 62 has, for example, two types of white LEDs with different color temperatures as second light sources. The light source 62 is positioned outside the frame 70 and emits light from outside the frame 70. The light emitted from the light source 62 enters the frame 70, passes through the frame 70, or diffuses and transmits through it, and is emitted from the surface of the frame 70 into the space in front of the front surface 64a. When the light-emitting unit 64 simulates a window, the frame 70 can simulate a window frame.

[0051] Each of the light sources 61 and 62 is controlled in the same manner as the light source unit 40 according to Embodiment 1. The lighting fixture 250 includes a control unit 20 and a lighting circuit 30 as shown in Figure 2. The lighting circuit 30 may be provided separately for the light sources 61 and 62. The lighting fixture 250 transmits a first set value and a second set value to the information terminal 10 via the communication unit 21 and receives the corrected first set value and second set value from the information terminal 10.

[0052] The information terminal 10 adjusts the first setting value based on the first setting value and the measured values ​​of chromaticity and illuminance of the lighting fixture 250, which were measured with the light source 62 turned off, so that the light emitted by the light source 61 approaches the first target chromaticity. Similarly, the information terminal 10 adjusts the second setting value based on the second setting value and the measured values ​​of chromaticity and illuminance of the lighting fixture 250, which were measured with the light source 61 turned off, so that the light emitted by the light source 62 approaches the second target chromaticity.

[0053] Figure 12 is a diagram showing the flow of color correction in the lighting control system 200 according to Embodiment 1. First, the information terminal 10 turns on the light source 61 and turns off the light source 62. The first set value of the dimming level of the light source 61 is transmitted to the information terminal 10. In addition, the chromaticity and illuminance of the light source 61 are measured by the measuring instrument 80, and the measured values ​​are transmitted to the information terminal 10. The information terminal 10 calculates a correction value for the first set value from the received first set value and the measured values. The information terminal 10 transmits the calculated correction information to the lighting fixture 250. The lighting fixture 250 turns on the light source 61 at a dimming level corresponding to the corrected first set value.

[0054] Next, with the light source 61 illuminated at a dimming level corresponding to the corrected first set value, the measuring instrument 80 measures the chromaticity and illuminance again. The measured values ​​are transmitted to the information terminal 10. The information terminal 10 then confirms the correction results. For example, if the difference between the corrected measured values ​​and the target chromaticity and target illuminance is smaller than a predetermined value, the information terminal 10 determines that the correction is complete. If the difference is larger than the predetermined value, the information terminal 10 calculates the correction values ​​again and transmits the correction information to the lighting fixture 250. In this way, the correction of the first set value is repeated until the correction is determined to be complete.

[0055] After the correction of the first setting value is completed, the information terminal 10 turns on the light source 62 and turns off the light source 61. The second setting value for the dimming level of the light source 62 is transmitted to the information terminal 10. In addition, the chromaticity and illuminance of the light source 62 are measured by the measuring instrument 80, and the measured values ​​are transmitted to the information terminal 10. The information terminal 10 calculates a correction value for the second setting value from the received second setting value and the measured values. The information terminal 10 transmits the calculated correction information to the lighting fixture 250. The lighting fixture 250 turns on the light source 62 at a dimming level corresponding to the corrected second setting value.

[0056] Next, with the light source 62 illuminated at a dimming level corresponding to the corrected second setting value, the chromaticity and illuminance are measured again by the measuring instrument 80. The measured values ​​are transmitted to the information terminal 10. The information terminal 10 then confirms the correction results. Similar to the first setting value, the correction of the second setting value is repeated until it is determined that the correction is complete.

[0057] If a lighting fixture has two light-emitting parts, the measurement value of the measuring instrument 80 will be the combined light from both light-emitting parts, and the measuring instrument 80 cannot distinguish which light-emitting part the light is coming from. Furthermore, if there are multiple light sources 61 and 62, as in the lighting fixture 250, changes in light color become a particularly significant problem. In this embodiment, measurement and correction are performed with one of the light sources 61 and 62 turned on and the other turned off. This allows the set value to be appropriately corrected even when there are multiple light-emitting parts.

[0058] In this embodiment as well, the information terminal 10 may sequentially light up the multiple first light sources and multiple second light sources for each light color and obtain measured values ​​for the chromaticity and illuminance of each of the multiple first light sources and multiple second light sources. In other words, the information terminal 10 sequentially lights up only one of the five LEDs included in the light sources 61 and 62 and obtains measured values ​​for each of the five LEDs. In this case, the information terminal 10 corrects the set value based on the set value and the measured values ​​for the chromaticity and illuminance of each of the five LEDs so that the light emitted by the lighting fixture 250 approaches the target chromaticity. The information terminal 10 also corrects the set value based on the set value and the measured values ​​for the chromaticity and illuminance of each of the five LEDs so that the light emitted by the lighting fixture 250 approaches the target illuminance.

[0059] The technical features described in each embodiment may be used in combination as appropriate.

[0060] The various aspects of this disclosure are summarized below as an appendix. (Note 1) A lighting fixture having multiple light sources of different colors, wherein the multiple light sources are illuminated at a dimming level according to a set value, A measuring instrument for measuring the chromaticity and illuminance of the light emitted by the aforementioned lighting fixture, An information terminal that corrects the setting value so that the light emitted by the lighting fixture approaches the target chromaticity, based on the setting value and the measured values ​​of chromaticity and illuminance measured by the measuring instrument, A lighting control system characterized by comprising the following features. (Note 2) The aforementioned lighting fixture is A first light source unit having multiple first light sources of different colors, wherein the multiple first light sources are illuminated at a dimming level corresponding to a first set value, A second light source unit having multiple second light sources of different colors, wherein the multiple second light sources are illuminated at a dimming level corresponding to a second set value, Equipped with, The lighting control system according to Appendix 1, characterized in that the information terminal corrects the first setting value based on the first setting value and the measured values ​​of chromaticity and illuminance measured when the second light source is turned off, so that the light emitted by the first light source approaches the target chromaticity. (Note 3) The lighting control system according to Appendix 1, characterized in that the information terminal sequentially lights up the plurality of light sources for each of the light colors, obtains the measured values ​​of chromaticity and illuminance for each of the plurality of light sources, and corrects the set value from the set value and the measured values ​​for each of the plurality of light sources so that the light emitted by the lighting fixture approaches the target chromaticity. (Note 4) The lighting control system according to any one of Appendix 1 to Appendix 3, characterized in that the information terminal corrects the set value based on the set value and the measured value so that the light emitted by the lighting fixture approaches the target illuminance. (Note 5) The lighting control system according to any one of Appendix 1 to Appendix 4, characterized in that the information terminal corrects the setting value so that the power consumption of the plurality of light sources after correction of the setting value is less than or equal to the value of the setting value before correction. (Note 6) The lighting control system according to any one of the appendices 1 to 5, characterized in that the target chromaticity can be set externally. (Note 7) A light source unit having multiple light sources of different colors, A lighting control unit that illuminates the plurality of light sources at a dimming level according to a set value, A communication unit transmits the aforementioned setting value to an information terminal and receives correction information for the setting value from the information terminal, based on the setting value and the measured values ​​of chromaticity and illuminance of the light emitted by the light source, to bring the light emitted by the light source closer to the target chromaticity. A lighting fixture characterized by having the following features. (Note 8) A control device that adjusts the dimming level setting of a lighting fixture having multiple light sources of different colors, based on measured values ​​of the chromaticity and illuminance of the light emitted by the lighting fixture, so that the light emitted by the lighting fixture approaches a target chromaticity. [Explanation of symbols]

[0061] 10 Information terminal, 11 Operation reception unit, 12 Control unit, 14 Communication unit, 15 Storage unit, 16 Display unit, 20 Control unit, 21 Communication unit, 22 Lighting control unit, 23 Storage unit, 30 Lighting circuit, 40 Light source unit, 40a, 40b Light source, 50 Lighting fixture, 61, 62 Light source, 64 Light-emitting unit, 64a Front, 70 Frame, 73 Part, 80 Measuring instrument, 81 Light receiving unit, 100, 200 Lighting control system, 240 Light source unit, 250 Lighting fixture

Claims

1. A lighting fixture comprising: a first light source unit having a plurality of first light sources of different colors, wherein the plurality of first light sources are illuminated at a dimming level corresponding to a first set value; and a second light source unit having a plurality of second light sources of different colors, wherein the plurality of second light sources are illuminated at a dimming level corresponding to a second set value; A measuring instrument for measuring the chromaticity and illuminance of the light emitted by the aforementioned lighting fixture, An information terminal that corrects the first setting value to bring the light emitted by the first light source closer to the target chromaticity, based on the first setting value and the measured values ​​of chromaticity and illuminance measured by the measuring instrument when the second light source is turned off. A lighting control system characterized by comprising the following features.

2. A lighting fixture having multiple light sources of different colors, wherein the multiple light sources are illuminated at a dimming level according to a set value, A measuring instrument for measuring the chromaticity and illuminance of the light emitted by the aforementioned lighting fixture, An information terminal that corrects the setting value so that the light emitted by the lighting fixture approaches the target chromaticity, based on the setting value and the measured values ​​of chromaticity and illuminance measured by the measuring instrument, Equipped with, The lighting control system is characterized in that the information terminal sequentially lights up the plurality of light sources for each of the light colors, obtains the measured values ​​of chromaticity and illuminance for each of the plurality of light sources, and corrects the set value from the set value and the measured values ​​for each of the plurality of light sources so that the light emitted by the lighting fixture approaches the target chromaticity.

3. The lighting control system according to claim 2, characterized in that the information terminal corrects the set value based on the set value and the measured value so that the light emitted by the lighting fixture approaches the target illuminance.

4. The lighting control system according to claim 2 or 3, characterized in that the information terminal corrects the setting value so that the power consumption of the plurality of light sources after correction of the setting value is less than or equal to the value of the setting value before correction.

5. The lighting control system according to any one of claims 1 to 3, characterized in that the target chromaticity can be set externally.

6. A first light source unit having a plurality of first light sources of different colors, wherein the plurality of first light sources are illuminated at a dimming level corresponding to a first set value, A second light source unit having multiple second light sources of different colors, wherein the multiple second light sources are illuminated at a dimming level corresponding to a second set value, A lighting control unit that illuminates the first light source unit and the second light source unit at dimming levels corresponding to the first set value and the second set value, respectively, A communication unit transmits the first setting value to an information terminal and receives correction information for the first setting value from the information terminal, based on the first setting value and the measured values ​​of chromaticity and illuminance of the light emitted by the first light source unit measured with the second light source unit turned off, to bring the light emitted by the first light source unit closer to the target chromaticity. A lighting fixture characterized by having the following features.

7. The first setting value of a lighting fixture comprising: a first light source unit having a plurality of first light sources of different light colors, wherein the plurality of first light sources are illuminated at a dimming level corresponding to a first setting value; and a second light source unit having a plurality of second light sources of different light colors, wherein the plurality of second light sources are illuminated at a dimming level corresponding to a second setting value, The chromaticity and illuminance measurements of the light emitted by the first light source are obtained while the second light source is turned off. A control device that corrects the first set value based on the first set value and the measured value so that the light emitted by the first light source unit approaches the target chromaticity.

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