Illumination control system, terminal device, illumination control method, and program

Abstract

A lighting control system (1) is provided with: one or more lighting fixtures (31A to 32D, 40 or 50) having one or more light emitting units (32A to 32D, 42 or 52); a control unit (13) that controls the one or more light emitting units (32A to 32D, 42, or 52); and an acquisition unit (12) that acquires position information indicating a prescribed position in a space illuminated by the one or more illumination devices (31A-32D, 40, or 50), and a target value of brightness at the prescribed position. The one or more light emitting units (32A to 32D, 42, or 52) emit illumination light that illuminates mutually different regions in the space. The control unit (13) determines the lighting condition of the one or more light emitting units (32A to 32D, 42, or 52) on the basis of the target value obtained by the obtaining unit (12), and controls the one or more light emitting units (32A to 32D, 42, or 52) on the basis of the determined lighting condition.

Description

Technical Field

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

[0002] Patent Documents 1 and 2 disclose a technique for mapping so that lighting control of a plurality of lighting fixtures can be performed. Marks associated with the plurality of lighting fixtures are displayed on a display unit of an operation terminal. The plurality of lighting fixtures can be controlled based on the marks.

[0003] Patent document 3 discloses a lighting device that changes the lighting method of each location in a spatial area to be illuminated. The lighting device disclosed in patent document 3 includes: a light source for generating illumination light, a light modulator that modulates light emitted from the light source according to image information, and a projection lens that projects the light modulated by the light modulator as illumination light.

[0004] (Prior art literature)

[0005] (Patent Document)

[0006] Patent Document 1: Japanese Patent Application Publication No. 2019-155334

[0007] Patent Document 2: Japanese Patent Application Publication No. 2019-36400

[0008] Patent Document 3: Japanese Patent Application Publication No. 2015-72416 Summary of the invention

[0009] Problems to be solved by the invention

[0010] When a user performs lighting control, he or she may want to illuminate a specific place such as near a table or chair. In order to meet this requirement, in the above-mentioned prior art, the user determines the lighting fixture for illuminating the specific place and selects a mark corresponding to the determined lighting fixture, thereby being able to control the lighting fixture.

[0011] However, since it is not easy to understand the correspondence between the place that the user wants to illuminate and the actual lighting fixture that illuminates the place, the user may determine the wrong lighting fixture, making it difficult to perform intuitive operations. Thus, the above-mentioned prior art has the problem of low user convenience.

[0012] Therefore, an object of the present invention is to provide a lighting control system, a terminal device, a lighting control method, and a program that are highly user-friendly.

[0013] Means for solving problems

[0014] A lighting control system involved in one embodiment of the present invention comprises: one or more lighting fixtures having one or more light-emitting parts; a control unit that controls the one or more light-emitting parts; and an acquisition unit that obtains position information showing a specified position in a space illuminated by the one or more lighting fixtures, and a target value of the brightness of the specified position, wherein the one or more light-emitting parts emit illumination light that illuminates different areas in the space, and the control unit determines lighting conditions of the one or more light-emitting parts based on the target value obtained by the acquisition unit, and controls the one or more light-emitting parts based on the determined lighting conditions.

[0015] A terminal device involved in one embodiment of the present invention comprises: a control unit, which controls one or more light-emitting units of one or more lighting fixtures; a user interface unit, which accepts operation input from a user; and an acquisition unit, which obtains position information showing a specified position in a space illuminated by the one or more lighting fixtures and a target value of brightness at the specified position based on the operation input accepted by the user interface unit, the one or more light-emitting units emitting illumination light that illuminates different areas in the space, the control unit determines lighting conditions of the one or more light-emitting units based on the target value obtained by the acquisition unit, and controls the one or more light-emitting units based on the determined lighting conditions.

[0016] A lighting control method involved in one embodiment of the present invention includes: a step of controlling one or more light-emitting parts of one or more lighting fixtures; and a step of obtaining position information showing a specified position in a space illuminated by the one or more lighting fixtures, and a target value of the brightness of the specified position, wherein the one or more light-emitting parts emit illumination light that illuminates different areas in the space, and in the step of controlling, a lighting condition of the one or more light-emitting parts is determined based on the obtained target value, and the one or more light-emitting parts are controlled based on the determined lighting condition.

[0017] Furthermore, one aspect of the present invention can be implemented as a program that causes a computer to execute the above-mentioned lighting control method, or can be implemented as a computer-readable non-transitory recording medium storing the program.

[0018] Effects of the Invention

[0019] The present invention can provide a lighting control system, a terminal device, a lighting control method and a program that are highly convenient for users. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a block diagram of the lighting control system according to the first embodiment.

[0021] Figure 2 This is a plan view showing an example of the layout of the lighting space of the lighting control system according to the first embodiment.

[0022] Figure 3 This is a plan view for explaining the relationship between a plurality of light emitting elements and an illumination area of ​​the lighting fixture according to Embodiment 1.

[0023] Figure 4 This is a diagram showing an example of an operation screen displayed on a terminal device of the lighting control system according to Embodiment 1.

[0024] Figure 5 It is used to illustrate Figure 4 The operation screen shown is a diagram of the operation of the display field.

[0025] Figure 6 This is a diagram showing another example of the operation screen displayed on the terminal device of the lighting control system according to the first embodiment.

[0026] Figure 7 This is a diagram showing another example of the operation screen displayed on the terminal device of the lighting control system according to the first embodiment.

[0027] Figure 8 This is a diagram showing another example of the operation screen displayed on the terminal device of the lighting control system according to the first embodiment.

[0028] Fig. 9 This is a diagram showing another example of the operation screen displayed on the terminal device of the lighting control system according to the first embodiment.

[0029] Fig.10 This is a diagram showing another example of the operation screen displayed on the terminal device of the lighting control system according to the first embodiment.

[0030] Fig.11 This is a flowchart showing the operation of the lighting control system according to the first embodiment.

[0031] Fig.12 This is a diagram showing the usage status of the lighting system involved in Embodiment 2.

[0032] Fig.13 This is a block diagram showing the configuration of a lighting system according to Embodiment 2.

[0033] Fig.14 This is a schematic perspective view of the lighting device involved in embodiment 2.

[0034] Fig.15AThis is a diagram showing an example of correspondence information stored in the storage unit of the lighting device involved in Embodiment 2.

[0035] Fig. 15B This is a diagram showing an example of correspondence information stored in the storage unit of the lighting device involved in Embodiment 2.

[0036] Fig.16 This is a flowchart showing the operation of the lighting system according to the second embodiment.

[0037] Fig.17 This is a flowchart showing the process of specifying a target surface during operation of the lighting system according to the second embodiment.

[0038] Fig.18 This is a block diagram showing the structure of the lighting device involved in Modification Example 1.

[0039] Fig.19 This is a block diagram showing a lighting system according to Modification Example 2. DETAILED DESCRIPTION

[0040] Hereinafter, the lighting control system, terminal device and lighting control method, as well as the lighting device, lighting system and control method of the lighting device, etc., involved in the embodiments of the present invention will be described in detail using the accompanying drawings. In addition, the embodiments described below are all examples of the present invention. Therefore, the numerical values, shapes, materials, components, configuration positions of components and connection methods, steps, order of steps, etc. shown in the following embodiments are all examples, and their purpose is not to limit the present invention. Therefore, the components of the following embodiments that are not recorded in the independent technical solutions are described as arbitrary components.

[0041] In addition, each figure is a schematic diagram and is not a strict illustration. Therefore, for example, the scale in each figure is not consistent. In addition, in each figure, substantially the same structure is marked with the same symbol, and repeated description is omitted or simplified.

[0042] In addition, in this specification, terms indicating the relationship between elements, terms indicating the shape of elements such as rectangle and circle, and numerical ranges not only indicate expressions in a strict sense but also indicate expressions having substantially the same range, for example, expressions including differences of approximately several percent.

[0043] In addition, in this specification, ordinal numbers such as “first” and “second” do not mean the number or order of components unless otherwise specified, but are used for the purpose of distinguishing components to avoid confusion with the same kind.

[0044] (Implementation Method 1)

[0045] [Overview of lighting control system]

[0046] First, regarding the overview of the lighting control system according to the present embodiment, Figure 1 and Figure 2 To explain.

[0047] Figure 1 It is a block diagram showing the configuration of a lighting control system 1 according to the present embodiment. Figure 2 It is a plan view showing an example of the layout of the lighting space 100 of the lighting control system 1 according to the present embodiment.

[0048] Figure 1 The lighting control system 1 shown is a Figure 2 The lighting space 100 is a space illuminated by one or more lighting fixtures, such as an indoor space such as a room in a building. The lighting fixture group 30 and the lighting fixtures 40 and 50 are fixed to the ceiling or wall of the lighting space 100.

[0049] The lighting fixture group 30, the lighting fixture 40, and the lighting fixture 50 can illuminate different areas. For example, the lighting fixture group 30 can illuminate the first area 110. The lighting fixture 40 can illuminate the second area 120. The lighting fixture 50 can illuminate the third area 130. The first area 110, the second area 120, and the third area 130 may partially overlap.

[0050] Each of the lighting fixture group 30, lighting fixture 40, and lighting fixture 50 has a plurality of light-emitting units. Since the plurality of light-emitting units are independently controlled, only a predetermined range in each of the first area 110, the second area 120, and the third area 130 can be illuminated. For example, a bright place and a dark place can be locally created in the area.

[0051] In this embodiment, each of the lighting fixture group 30, lighting fixture 40, and lighting fixture 50 can be controlled based on the operation input from the user via the UI unit 11 of the terminal device 10 and / or the detection result based on the sensor unit 20. For example, when the user wants to illuminate the range desired by the user, even if the user does not specifically determine the lighting fixture that illuminates the range, it is sufficient to set the range and the target value of the brightness of the range through the UI unit 11 of the terminal device 10. The lighting control system 1 automatically illuminates the range desired by the user based on the operation input of the user. In addition, the lighting control system 1 can automatically illuminate the range based on the detection result of the sensor unit 20 even if the user does not set it.

[0052] Thus, the present embodiment can realize a lighting control system 1, a terminal device 10, a lighting control method, etc. with high user convenience. When the user convenience is high, the user's operation is quick and easy to perform according to the request, so it can be expected to reduce the number of re-operations and the operation time, thereby reducing the power consumption of the lighting control system 1. The following describes the details of the specific components that constitute the lighting control system 1.

[0053] [constitute]

[0054] like Figure 1 As shown, the lighting control system 1 includes a terminal device 10 , a sensor unit 20 , a lighting fixture group 30 , and lighting fixtures 40 and 50 .

[0055] The terminal device 10 is a control device that performs lighting control of the lighting fixture group 30 and the lighting fixtures 40 and 50. Lighting control includes not only lighting (conduction) and lighting (cutoff), but also includes control related to lighting light, such as dimming, color adjustment, and changes in lighting areas (lighting ranges). In this embodiment, the terminal device 10 performs lighting control based on operation input from the user and / or based on the detection results of the sensor unit 20. The terminal device 10 is connected to each of the sensor unit 20, the lighting fixture group 30, the lighting fixtures 40 and 50 in a manner that allows communication via a network. The communication is wireless communication or wired communication.

[0056] The terminal device 10 is, for example, a portable terminal such as a smartphone or a tablet terminal, or an operation terminal fixed to a wall or the like, or a desktop computer device or the like.

[0057] like Figure 1 As shown, the terminal device 10 includes a UI (User Interface) unit 11 , an acquisition unit 12 , and a control unit 13 .

[0058] The UI unit 11 receives operation input from the user. Specifically, the UI unit 11 has a display unit that displays an operation screen that the user can operate. The display unit is a touch display that performs both reception and display of operation input. Alternatively, the UI unit 11 may also have a display dedicated to display and input devices such as a keyboard, a mouse, and a microphone. Specific examples of the operation screen will be described later.

[0059] The acquisition unit 12 acquires position information indicating a specified position in the lighting space 100, and a target value of brightness at the specified position. For example, the acquisition unit 12 may acquire position information indicating a plurality of positions including the specified position, and a target value of brightness at each of the plurality of positions. The plurality of positions are, for example, positions separated from each other. Furthermore, the acquisition unit 12 further acquires a target value of at least one of the size, shape, and color of the lighting area that illuminates the specified position. The acquisition unit 12 may acquire a target value of the size, shape, and color of each of the plurality of lighting areas that illuminate each of the plurality of positions including the specified position.

[0060] Brightness is represented by illumination, for example. Alternatively, brightness can also be represented by luminosity. Color is represented by color temperature, for example. Alternatively, color can also be represented by color information such as RGB.

[0061] The multiple positions can be represented by two-dimensional regions or three-dimensional regions. For example, the acquisition unit 12 can also obtain the target value (target value of size and shape) of the region in the specified irradiation surface such as the floor surface or the wall surface. In addition, the multiple positions can be spatially continuous positions. That is, the acquisition unit 12 can obtain the distribution of the target value of brightness in the lighting space 100 as the target value of brightness for each of the multiple positions.

[0062] In this embodiment, the acquisition unit 12 acquires the target value according to the operation input received by the UI unit 11. Specifically, the acquisition unit 12 acquires the position information showing the position (prescribed position) selected by the user and the target value of at least one of the brightness, color, size and shape of the position according to the operation input received by the UI unit 11. In addition, the acquisition unit 12 may determine the prescribed position according to the object detected by the sensor unit 20. For example, the acquisition unit 12 acquires the target value of the brightness of the determined prescribed position.

[0063] The control unit 13 determines the lighting conditions of one or more light-emitting units based on the target value obtained by the acquisition unit 12, and controls the one or more light-emitting units based on the determined lighting conditions. Specifically, the control unit 13 determines the light-emitting unit to be lit among the one or more light-emitting units based on the specified position of the target value obtained by the acquisition unit 12, and determines the lighting conditions of the determined light-emitting units. For example, corresponding information indicating the correspondence between the light-emitting units and the lighting areas that can be illuminated, which is used to determine the lighting area of ​​each of the one or more light-emitting units, is stored in a memory (not shown) that can be read by the control unit 13. The control unit 13 can determine the light-emitting unit that illuminates the specified position by referring to the corresponding information read from the memory.

[0064] In this embodiment, the control unit 13 generates a brightness distribution in the lighting space 100 according to the target value of brightness at each of the plurality of positions, and determines the lighting condition according to the generated brightness distribution. The lighting condition includes, for example, information indicating one or more light-emitting units that emit illumination light for realizing the generated brightness distribution, and light-related parameters such as the light intensity, light color, emission direction, and emission range of each light-emitting unit. In addition, the brightness distribution is specifically an illuminance distribution, but there is no particular limitation as long as it is a distribution indicating brightness.

[0065] The lighting condition is determined for each of the lighting fixture group 30, the lighting fixture 40, and the lighting fixture 50. In addition, the lighting condition may be determined for each of the lighting fixtures 31A to 31D. The lighting condition is, for example, the brightness distribution of the range that each fixture can illuminate. The control unit 13 generates and sends a control command for each of the lighting fixture group 30, the lighting fixture 40, and the lighting fixture 50 according to the determined lighting condition.

[0066] The acquisition unit 12 and the control unit 13 are each implemented by, for example, an integrated circuit (IC: Integrated Circuit), namely, LSI (Large Scale Integration). In addition, the integrated circuit is not limited to LSI, and may also be a dedicated circuit or a general-purpose processor. For example, the acquisition unit 12 and the control unit 13 may be one or more microcontrollers. The microcontroller includes, for example, a non-volatile memory storing a program, a temporary storage area for executing the program, namely, a volatile memory, an input / output port, and a processor for executing the program. Furthermore, the acquisition unit 12 and the control unit 13 may be a programmable FPGA (Field Programmable Gate Array), or a reconfigurable processor that can reconfigure the connection and settings of the circuit units inside the LSI. The functions performed by the acquisition unit 12 and the control unit 13 may be implemented by software or by hardware.

[0067] The sensor unit 20 detects a specified object in the lighting space 100. The object is an object illuminated by the lighting light. The sensor unit 20 detects an object that satisfies specified conditions among multiple objects in the lighting space 100 as an object. The specified conditions are conditions set in advance by a user or the like. Examples of the object are daily necessities such as tables and chairs, or stationary objects such as interior decorations such as paintings and ornamental plants. The sensor unit 20 detects the position, shape, size, etc. of the object. The sensor unit 20 sends the detection results to the terminal device 10.

[0068] The sensor unit 20 includes, for example, an image sensor and an image processing circuit that processes an image obtained by the image sensor. The image processing circuit detects the position, shape, size, etc. of an object from an image by performing processing such as contour extraction. The processing performed by the image processing circuit can be performed by the acquisition unit 12 or the control unit 13 of the terminal device 10. In addition, the sensor unit 20 can be an object detection sensor using infrared rays or ultrasonic waves.

[0069] The lighting fixture group 30 includes four lighting fixtures 31A, 31B, 31C, and 31D. The number of lighting fixtures included in the lighting fixture group 30 may be plural, and is not limited to four.

[0070] The four lighting fixtures 31A, 31B, 31C, and 31D are examples of the first lighting fixture, and each has only one light-emitting portion. Specifically, the lighting fixture 31A has a light-emitting portion 32A. The lighting fixture 31B has a light-emitting portion 32B. The lighting fixture 31C has a light-emitting portion 32C. The lighting fixture 31D has a light-emitting portion 32D. The lighting fixtures 31A to 31D are, for example, downlights, ceiling lamps, base lamps, spotlights, etc.

[0071] The light emitting parts 32A to 32D respectively emit illumination lights for illuminating mutually different regions in the illumination space 100. In the present embodiment, each light emitting part is assigned an area that can be illuminated (illumination-enabled area). The illumination-enabled areas may partially overlap each other. For example, the illumination lights emitted from the light emitting parts 32A to 32D respectively illuminate mutually different regions in the first region 110.

[0072] In addition, the illuminable area of ​​the light emitting unit refers to the area that can be illuminated by the illumination light emitted from the light emitting unit. And the illumination area described later refers to the area illuminated by the illumination light emitted from more than one light emitting unit. By controlling the lighting conditions such as lighting and extinguishing of each light emitting unit, at least one of the size, shape and color of the illumination area can be adjusted.

[0073] Each of the light emitting units 32A to 32D includes a plurality of light emitting elements, such as LEDs (Light Emitting Diodes), laser elements, organic electroluminescence elements, etc. The light emitting units 32A to 32D turn on or off, dim, and adjust the color according to control commands sent from the control unit 13 .

[0074] For example, the light emitting unit 32A includes a blue LED and a yellow phosphor disposed on the light emitting side of the blue LED. A portion of the blue light emitted by the blue LED excites the yellow phosphor to emit yellow light. The light emitting unit 32A emits white light which is a mixture of blue light and yellow light.

[0075] The lighting fixture 31A has a lighting circuit which is not shown in the figure. The lighting circuit controls the light emission of the light emitting unit 32A by supplying electric power to the light emitting unit 32A. Specifically, the lighting circuit turns on, turns off, dims, and adjusts the color of the light emitting unit 32A according to the control command sent from the control unit 13. The lighting circuit is implemented by, for example, an ASIC (Application Specific Integrated Circuit). The lighting circuit supplies a current which has been subjected to PWM (Pulse Width Modulation) to each of the multiple light emitting elements included in the light emitting unit 32A. The dimming function can be achieved by adjusting the pulse width of the supplied current to change the light emission intensity of the light emitting unit 32A. In addition, the dimming method is not particularly limited, and it can also be an amplitude modulation or phase modulation method.

[0076] The plurality of light emitting elements included in the light emitting unit 32A may include a plurality of light emitting elements that emit white light of different color temperatures. By adjusting the emission intensities of the plurality of light emitting elements, the light emitting unit 32A can emit white light of a desired color temperature.

[0077] The light emitting units 32B to 32D also have the same configuration as the light emitting unit 32A. Therefore, each of the lighting fixtures 31A to 31D can independently perform lighting, lighting extinguishing, dimming, and color adjustment.

[0078] In addition, each of the lighting fixtures 31A to 31D may communicate directly with the terminal device 10 , or may communicate indirectly with the terminal device 10 via a control device (not shown) that performs lighting control on the lighting fixtures 31A to 31D.

[0079] The lighting fixture 40 is an example of a second lighting fixture, and has a plurality of light emitting parts. Figure 1 As shown, the lighting fixture 40 includes a lighting circuit 41 and an array light source 43 including a plurality of light emitting elements 42 arranged two-dimensionally. The plurality of light emitting elements 42 are respectively a plurality of light emitting units.

[0080] The lighting circuit 41 controls the light emission of each of the plurality of light emitting elements 42. The lighting circuit 41 performs lighting, extinguishing, dimming, and color adjustment of each of the plurality of light emitting elements 42 according to the control command sent from the control unit 13. The lighting circuit 41 is implemented by, for example, an ASIC. The lighting circuit 41 provides a PWM current to each of the plurality of light emitting elements 42. By adjusting the pulse width of the current provided for each light emitting element 42, the light emission intensity of each light emitting element 42 is changed, and a dimming function can be implemented. In addition, there is no particular limitation on the dimming method, and it can be an amplitude modulation method or a phase modulation method, etc.

[0081] Each of the plurality of light emitting elements 42 is a μLED. A μLED is a tiny LED having a maximum width of less than 100 μm. In addition, the light emitting element 42 may be a miniLED, a laser light emitting element, or an organic EL element. A miniLED is an LED having a maximum width of more than 100 μm and less than 200 μm. In addition, the plurality of light emitting elements 42 is an LED having a maximum width greater than 200 μm.

[0082] The light emitting element 42 emits light by the current supplied from the lighting circuit 41. The light emitting element 42 includes, for example, a blue LED and a yellow phosphor disposed on the light emitting side of the blue LED. A portion of the blue light emitted by the blue LED excites the yellow phosphor, thereby emitting yellow light. The light emitting element 42 emits white light which is a mixture of blue light and yellow light.

[0083] A plurality of light emitting elements 42 are mounted on a substrate. Here, the substrate is a rigid substrate, but may also be a flexible substrate. A pattern wiring is provided on the substrate, and the pattern wiring is used to electrically connect each of the plurality of light emitting elements 42 to the lighting circuit 41.

[0084] The plurality of light emitting elements 42 are arranged in a plane area of ​​a predetermined size on the substrate, and 256×256 of them are arranged. The plane area where the light emitting elements 42 are arranged is, for example, a rectangular area of ​​3 mm×3 mm. In addition, the number of light emitting elements 42 and the size of the arrangement area are only examples and are not particularly limited. By arranging a plurality of light emitting elements 42 in a narrow area, it is possible to miniaturize the projection lens (not shown) or improve the light introduction efficiency.

[0085] In addition, the array light source 43 has a dimming function and a color adjustment function. For example, each of the plurality of light emitting elements 42 can change the light intensity according to the amount of current provided from the lighting circuit 41. And, for example, the plurality of light emitting elements 42 can include a plurality of light emitting elements that emit white light of different color temperatures. By adjusting the light intensity of the plurality of light emitting elements, the array light source 43 can emit white light of a desired color temperature.

[0086] In addition, the plurality of light emitting elements 42 may include a red LED that emits red light, a green LED that emits green light, and a blue LED that emits blue light. Therefore, the array light source 43 can emit colored light other than white light.

[0087] The lighting fixture 40 may be a projector capable of projecting images, etc. Specifically, the lighting fixture 40 is a liquid crystal or DLP (Digital Lighting Processing) projector. In this case, each of the plurality of light-emitting units of the lighting fixture 40 may be considered to correspond to each pixel of the liquid crystal or each microscopic mirror of the DMD (Digital Mirror Device).

[0088] The lighting fixture 50 is an example of a third lighting fixture, and includes an adjustment unit for adjusting the emission direction of the illumination light from the light emitting unit. Figure 1 As shown, the lighting fixture 50 includes an adjustment unit 51 and a light emitting unit 52 .

[0089] The adjustment unit 51 adjusts the emission direction of the illumination light from the light emitting unit 52. The adjustment unit 51 adjusts the emission direction of the illumination light based on the control command sent from the control unit 13.

[0090] The adjustment unit 51 includes a drive mechanism capable of changing the orientation of the light emitting unit 52 or the orientation of a projection lens (not shown) that projects light from the light emitting unit 52. The drive mechanism can change the orientation of the entire lighting device 50. The drive mechanism is, for example, a stepping motor or an actuator.

[0091] The light emitting unit 52 has the same configuration as the light emitting unit 32A. The lighting fixture 50 has a lighting circuit (not shown). The lighting circuit of the lighting fixture 50 has the same configuration as the lighting circuit of the lighting fixture 31A. The light emitting unit 52 is turned on, off, dimmed, and adjusted in color.

[0092] In the lighting fixture 50, the adjustment unit 51 can adjust the shape or size of the lighting area. For example, in the case where the lighting fixture 50 has a projection lens, the adjustment unit 51 can change the size of the lighting area by changing the positional relationship between the projection lens and the light emitting unit 52. In addition, for example, the lighting fixture 50 has a shading component (not shown) that shields a portion of the illumination light from the light emitting unit 52, and the adjustment unit 51 can change the configuration of the shading component. The shading component can be a component having an opening in a predetermined shape such as a circle or a rectangle. The shape or size of the opening can also be changed by a shutter or the like. The adjustment unit 51 can change the shape or size of the lighting area by changing the shape or size of the opening, or by changing the position of the shading component on the optical path of the illumination light or outside the optical path.

[0093] In addition, the lighting fixture 50 may include an array light source similar to the array light source 43 of the lighting fixture 40, instead of the light emitting unit 52. The adjustment unit 51 changes the emission direction of light from the array light source, and controls the lighting, extinguishing, dimming, and color adjustment of each of the plurality of light emitting elements included in the array light source, thereby enabling detailed lighting control.

[0094] Here, regarding the correspondence between the light-emitting portion and the illumination area, Figure 3 To explain. Figure 3 It is a plan view for explaining the relationship between a plurality of light emitting elements 42 and an illumination area of ​​a lighting fixture 40 according to the present embodiment.

[0095] exist Figure 3 4 shows an example in which the array light source 43 of the lighting fixture 40 includes light emitting elements 42 arranged two-dimensionally in 13 rows×8 columns. Among them, 3×3 light emitting elements 42A, 2×2 light emitting elements 42B, and 3×4 light emitting elements 42C with halftone dots are turned on.

[0096] In the lighting fixture 40, the light emitting elements 42 correspond to the illuminable areas one to one. When a plurality of light emitting elements 42 gathered together are turned on, the illumination area corresponding to the gathered range is illuminated. Figure 3 As shown, in the second area 120 illuminated by the lighting fixture 40, an illumination area 121A corresponding to the nine light emitting elements 42A, an illumination area 121B corresponding to the four light emitting elements 42B, and an illumination area 121C corresponding to the twelve light emitting elements 42C are illuminated.

[0097] The lighting fixture group 30 also has Figure 3 The same correspondence relationship exists. Specifically, each of the plurality of lighting fixtures 31A to 31D corresponds to one of the plurality of light emitting elements 42 arranged two-dimensionally. By performing lighting control on each of the lighting fixtures 31A to 31D, the corresponding area can be illuminated.

[0098] In the case of the lighting fixture 50, different areas can be illuminated by changing the emission direction of the illumination light by the adjustment unit 51. That is, one light emitting unit 52 can illuminate a plurality of areas.

[0099] [Operation screen]

[0100] Next, regarding a specific example of an operation screen displayed on the display unit of the UI unit 11 of the terminal device 10, Figure 4 as well as Figure 5 Provide explanation.

[0101] Figure 4 This is a diagram showing an example of an operation screen displayed on the terminal device 10 of the lighting control system 1 according to the present embodiment. Figure 5 It is used to illustrate Figure 4 FIG. 2 is a diagram showing an operation of the display field 210 of the operation screen 200 shown.

[0102] Figure 4 The operation screen 200 shown includes a display area 210, a size adjustment operation object 221, a brightness adjustment operation object 222, a color adjustment operation object 223, an add button 240, and a delete button 250. Each component included in the operation screen 200 is a GUI (Graphical User Interface) operation object that can be operated by the user.

[0103] The display area 210 is defined by a two-dimensional coordinate system. The two-dimensional coordinates in the display area 210 correspond to the positions in the lighting space 100. Figure 5 For convenience of explanation, the first area 110, the second area 120 and the third area 130 of the lighting space 100 are respectively displayed in the display area 210. In addition, the dotted lines indicating the first area 110, the second area 120 and the third area 130 in the operation screen 200 may be actually displayed.

[0104] Figure 4 Each of the icons 211A, 211B, and 211C shown corresponds to an illumination area and is displayed in the display area 210. The illumination light is irradiated to a position in the illumination space 100 corresponding to the two-dimensional coordinates of each of the icons 211A, 211B, and 211C in the display area 210. For example, Figure 5 In the example shown in (a), icons 211A and 211B are located in the range corresponding to the first area 110 of the display area 210, so two places in the first area 110 of the lighting space 100 are illuminated. In addition, icon 211C is located near the center of the range corresponding to the second area 120, so the center of the second area 120 of the lighting space 100 is illuminated.

[0105] Each of icons 211A, 211B, and 211C can be selected by the user and moved within display field 210. For example, Figure 5 As shown in (b), the icon 211B is selected and dragged by the operating body 90 such as a finger or a pointer, so that the icon 211B can be moved. As the icon 211B moves, the lighting area in the lighting space 100 also moves. That is, the icon 211B moves in a linked manner with the actual lighting area in the lighting space 100.

[0106] Icons 211A, 211B, and 211C can be selected by the user. For example, when icon 211A is selected by a touch operation or a single click operation, size adjustment operation object 221, brightness adjustment operation object 222, and color adjustment operation object 223 become GUI operation objects for adjusting the size, brightness, and color of the lighting area corresponding to icon 211A, respectively.

[0107] The size adjustment operation object 221 is a GUI operation object for adjusting the size of the lighting area. The size of the lighting area is represented by the area, diameter, or maximum width of the lighting area. The size adjustment operation object 221 is a slider, but is not limited to this. The size adjustment operation object 221 can also be a text box for directly inputting the size with a numerical value, or a radio button or a drop-down list for selecting from a plurality of pre-defined candidates.

[0108] The brightness adjustment operation object 222 is a GUI operation object for adjusting the brightness of the lighting area. The brightness adjustment operation object 222 is a slider, but is not limited thereto. The brightness adjustment operation object 222 may be a text box, a radio button, a drop-down list, etc., similarly to the size adjustment operation object 221.

[0109] The color adjustment operation object 223 is a GUI operation object for adjusting the color temperature of the lighting area. The color adjustment operation object 223 is a slider, but is not limited thereto. The color adjustment operation object 223, like the size adjustment operation object 221, may also be a text box, a radio button, or a drop-down list. In addition, when the lighting fixture group 30, the lighting fixtures 40, and 50 emit colored light other than white light, the color adjustment operation object 223 may include GUI operation objects corresponding to RGB, respectively.

[0110] In addition, the operation screen 200 may include a shape adjustment operation object for adjusting the shape of the lighting area. For example, the shape adjustment operation object may be a radio button or a drop-down list for selecting a geometric shape such as a circle, an ellipse, a square, a rectangle, or a triangle, or a number or text. Alternatively, the shape adjustment operation object may also be a text box for inputting a geometric shape, number, or text.

[0111] The add button 240 is a GUI operation object for adding a new icon to the display area 210. For example, when the add button 240 is selected, the icon is added to a predetermined position in the display area 210. Alternatively, after the add button 240 is selected, when an arbitrary position in the display area 210 is selected, the icon is added to the selected position. With the addition of the icon, a new lighting area corresponding to the icon is illuminated in the lighting space 100.

[0112] The delete button 250 is a GUI operation object for deleting an icon present in the display area 210. For example, after selecting an icon in the display area 210, the delete button 250 is selected, and the selected icon is deleted. With the deletion of the icon, the lighting area corresponding to the icon in the lighting space 100 disappears.

[0113] In addition, the specific display example of the operation screen 200 is not limited to Figure 4 The example shown. The arrangement of each operation object can be changed. In addition, GUI operation objects other than the above functions may be provided in the operation screen 200, and some of the above GUI operation objects may not be provided.

[0114] For example, the add button 240 and the delete button 250 may not be provided. For example, a new icon may be added when a predetermined operation (e.g., single click (touch), double click, long press) is performed at a location where the icons 211A, 211B, and 211C do not exist in the display area 210. Also, when a predetermined operation (long press, right click, etc.) is performed on the icons 211A, 211B, and 211C, an option to delete the selected icon (lighting area) may be displayed.

[0115] In this embodiment, the lighting area of ​​the lighting space changes in a manner linked to the user's operation input to the operation screen 200. In addition, when the size adjustment operation object 221 is operated, the size of the corresponding lighting area changes. This also applies to the brightness adjustment operation object 222 and the color adjustment operation object 223.

[0116] For example Figure 5 As shown in (b), when the icon 211B in the display area 210 moves, the lighting area also moves as the icon 211B moves. At this time, the position corresponding to the icon 211B before the movement is illuminated by the lighting fixture group 30 that illuminates the first area 110, while the position corresponding to the icon 211B after the movement is illuminated by the lighting fixture 50 that illuminates the third area 130. In other words, the user can be unaware of the existence of the lighting fixture, and only needs to select the lighting position in the display area 210, and the appropriate lighting fixture can automatically illuminate. In this way, the user does not need to determine the lighting fixture, and can perform intuitive lighting control. In this way, a lighting control system 1 with high user convenience can be implemented.

[0117] [Modification example of operation screen]

[0118] Next, use Figures 6 to 10 A modified example of the operation screen will be described.

[0119] Figures 6 to 10Each of them is a diagram showing another example of the operation screen 200 displayed on the terminal device 10 of the lighting control system 1 according to the present embodiment.

[0120] exist Figure 6 In the operation screen 200 shown, the display area 210 includes a photographic image 212 of the lighting space 100 as a background image. The photographic image 212 is an image of the lighting space 100 that was previously photographed, but is not limited to this. The photographic image 212 may also be a real-time image taken by a camera. For example, the terminal device 10 has a camera (e.g., the sensor unit 20), and the image obtained by aiming the camera at the lighting space 100 can be used as the photographic image 212. The photographic image 212 may also be a moving image.

[0121] Since the icons 211A and 211B can be displayed overlapping with the photographed image 212 , the lighting area can be identified by simply looking at the operation screen 200 , and lighting control can be performed with greater intuitiveness.

[0122] exist Figure 7 In the operation screen 200 shown, the display area 210 includes a layout image 213 showing the planar layout of the lighting space 100 as a background image. The layout image is generated based on design data of the lighting space 100 and is stored in a memory (not shown) of the terminal device 10, for example.

[0123] Since the icons 211A, 211B, and 211C can be displayed overlapping the layout image 213 , the lighting area can be identified by simply looking at the operation screen 200 , and lighting control can be performed with better intuitiveness.

[0124] exist Figure 8 In the operation screen 200 shown in FIG. 1 , the display area 210 includes icons 214A, 214B, and 214C. The icons 214A, 214B, and 214C respectively represent at least one of the size, shape, brightness, and color of the lighting area. Figure 8 Icon 214B is a circle that is larger than icon 214A. Therefore, in the actual lighting space 100, the lighting area corresponding to icon 214B is a circle that is larger than the lighting area corresponding to icon 214A. Furthermore, since the shape of icon 214C is an ellipse, the lighting area corresponding to icon 214C is also an ellipse. Furthermore, in a case where icon 214A is displayed brighter than icon 214B, the lighting area corresponding to icon 214A is illuminated brighter than the lighting area corresponding to icon 214B. The same applies to the display colors of icons 214A, 214B, and 214C, which represent the color (color temperature) of the lighting light that illuminates the lighting area corresponding to each icon.

[0125] In this way, by indicating the size, shape, brightness, color, etc. of the actual lighting area by icons 214A, 214B, and 214C, the lighting method of the lighting area can be determined by only looking at the operation screen 200, and lighting control can be performed with better intuitiveness.

[0126] exist Fig. 9 In the operation screen 200 shown, the display area 210 includes an illumination distribution image 215. The illumination distribution image 215 is an image showing an illumination distribution which is an example of brightness distribution of the illumination space 100. Specifically, the illumination distribution image 215 shows the illumination at each position of the illumination space 100. The illumination distribution image 215 is generated according to the operation input of the user.

[0127] For example, when the user selects a position in the display area 210 and sets the brightness (illuminance) of the position, the illuminance distribution is set so that the farther away from the selected position, the lower the brightness (illuminance). When multiple positions are selected, the illuminance distribution is set so that each of the multiple positions is a local peak of the brightness (illuminance). For example, Fig. 9 The illuminance distribution image 215 shown shows the illuminance distribution when four locations are selected.

[0128] The illuminance distribution is generated, for example, by the acquisition unit 12 or the control unit 13 and displayed on the display unit. The illuminance distribution can be generated based on the data of each lighting fixture group 30, lighting fixtures 40, and 50, such as the light distribution and luminous flux of each fixture. In addition, there is no particular limitation on the method for generating the illuminance distribution. Software for performing lighting design of a space may also be used. In addition, for example, the acquisition unit 12 may also obtain the illuminance distribution generated by other devices.

[0129] By visually displaying the illuminance distribution in this way, the user can be presented with the lighting state of the lighting space 100 simply by looking at the operation screen 200. Therefore, the lighting control can be performed with better intuitiveness.

[0130] In addition, the display area 210 may include a color (color temperature) distribution image instead of the illuminance distribution image 215. The color distribution image indicates the color temperature of each position in the lighting space 100. The illuminance distribution image 215 and the color distribution image may be switched and displayed automatically or manually.

[0131] exist Fig.10 In the operation screen 200 shown in FIG. Figure 6 Likewise, the display area 210 may include a photographic image 212 that captures the illumination space 100 as a background image. The photographic image 212 is an image captured by the sensor unit 20.

[0132] In addition, the display area 210 includes icons 216A, 216B, and 216C. The icons 216A, 216B, and 216C are displayed according to the detection results based on the sensor unit 20. Specifically, the icons 216A, 216B, and 216C that match the shape of the object detected by the sensor unit 20 are displayed. By selecting the icons 216A, 216B, and 216C, the brightness and color of each lighting area, and the shape and size can be finely adjusted.

[0133] In the operation screen 200, when the user selects a position in the photographic image 212, an icon of a predetermined shape may be displayed according to the selected position. For example, when the user selects a part of a painting, an icon corresponding to the shape of the painting may be automatically displayed.

[0134] In this way, even if the user does not perform any operation, the area of ​​the predetermined shape can be automatically illuminated. By omitting the user's operation, the user convenience can be further improved.

[0135] In addition, when using the detection result based on the sensor unit 20, the terminal device 10 may not display the operation screen 200. For example, the control unit 13 of the terminal device 10 may determine the lighting area based on the detection result, and determine the brightness and color of the determined lighting area. For example, the control unit 13 may pre-store control information that pre-establishes the corresponding type (e.g., painting, upper surface of a table, etc.), size and / or shape, brightness, and color of the lighting area. The control unit 13 can perform lighting control based on the control information and the detection result without obtaining an operation input from the user.

[0136] Figure 4 , Figures 6 to 10 The operation screen 200 shown can be switched according to the operation performed by the user. For example, a display switching button can be provided on the operation screen 200, and the display content of the display area 210 can be changed by selecting the display switching button.

[0137] In addition, for example, a registration button for registering the set lighting state (lighting scene) may be provided on the operation screen 200. By registering a plurality of lighting states, the lighting state can be easily switched.

[0138] [Work]

[0139] Next, use Fig.11 The operation of the lighting control system 1 according to the present embodiment will be described. Fig.11 This is a flowchart showing the operation of the lighting control system 1 according to the present embodiment.

[0140] like Fig.11 As shown, first, the obtaining unit 12 obtains the target value of brightness based on the operation input received by the UI unit 11 and / or the detection result based on the sensor unit 20 (S10). For example, the user operates the operation screen 200 displayed on the display unit of the UI unit 11, and the UI unit 11 receives the operation input performed on the operation screen 200. The obtaining unit 12 obtains the target values ​​of brightness of a specified position and the size, shape, and color of the lighting area that illuminates the specified position based on the operation input.

[0141] Next, the control unit 13 generates the brightness distribution of the lighting space 100 based on the obtained information (S20). Specifically, the control unit 13 generates the brightness distribution of the lighting space 100 based on the position of one or more icons in the display area 210 of the operation screen 200, and the size, shape, brightness and color corresponding to each of the one or more icons.

[0142] Next, the control unit 13 divides the brightness distribution of the lighting space 100 into the brightness distribution of each area (S30). Specifically, the control unit 13 divides the brightness distribution of the lighting space 100 into the brightness distribution of each of the first area 110, the second area 120, and the third area 130. In addition, the control unit 13 may further divide the brightness distribution of the first area 110 into the brightness distribution of each lighting area of ​​each of the lighting fixtures 31A to 31D.

[0143] Next, the control unit 13 determines the lighting fixture and the light-emitting unit to be turned on (S40). The lighting fixture or the light-emitting unit corresponds to the area that can be illuminated one-to-one. For example, the control unit 13 determines the light-emitting unit or the lighting fixture that emits the illumination light that illuminates the position with high illumination in the brightness distribution as the light-emitting unit or the lighting fixture to be turned on.

[0144] Next, the control unit 13 determines the lighting condition of each light-emitting unit (S50). Specifically, the control unit 13 determines the lighting condition of each of the lighting fixtures 31A to 31D based on the brightness distribution of the first area 110. For example, the control unit 13 determines the dimming rate, color temperature, light irradiation range, etc. of each of the lighting fixtures 31A to 31D as the lighting condition. In addition, the control unit 13 determines the dimming rate of each of the multiple light-emitting elements 42 of the lighting fixture 40 as the lighting condition based on the brightness distribution of the second area 120. In addition, the control unit 13 determines the adjustment amount and adjustment direction based on the adjustment unit 51 as the lighting condition based on the brightness distribution of the third area 130. In this way, the control unit 13 determines the lighting conditions suitable for each area according to the capabilities of the lighting fixture group 30 or the lighting fixtures 40 or 50.

[0145] At this time, when two or more light-emitting units or lighting fixtures illuminate adjacent lighting areas, the control unit 13 corrects the lighting conditions in a manner that does not generate uneven light, scalloped light edges (Scallop), cracks, etc. at the boundary portion of the lighting area. For example, when a portion of the lighting light from two light-emitting units or lighting fixtures overlaps, the illuminance at the overlapping portion may be too high. In this case, the lighting conditions of at least one of the two light-emitting units are changed in a manner that the illuminance of the overlapping portion becomes lower, thereby suppressing the illuminance of the overlapping portion.

[0146] Next, the control unit 13 sends control commands to the lighting fixture group 30, lighting fixtures 40, and 50, respectively (S60). The control command includes lighting conditions generated for each lighting fixture group or each lighting fixture. The lighting fixture group 30, lighting fixtures 40, and 50 each emit lighting light according to the received control command. Thus, the lighting space 100 is illuminated in a desired manner.

[0147] In this embodiment, each time the user operates the operation screen 200, Fig.11 The processing shown is executed. As a result, the lighting state of the lighting space 100 can be changed in conjunction with the user's operation input. The user can operate the operation screen 200 regardless of the type or characteristics of the lighting fixture, so that lighting control with excellent intuitiveness can be achieved.

[0148] [Summarize]

[0149] As described above, the lighting control system involved in the A1 embodiment of the present invention is, for example, the lighting control system 1 described above, and includes: one or more lighting fixtures having one or more light-emitting units; a control unit 13 that controls the one or more light-emitting units; and an acquisition unit 12 that acquires position information indicating a predetermined position in the lighting space 100 illuminated by the one or more lighting fixtures, and a target value of brightness at the predetermined position. The one or more light-emitting units emit illumination light, and the illumination light illuminates mutually different areas in the lighting space 100. The control unit 13 determines lighting conditions of the one or more light-emitting units based on the target value acquired by the acquisition unit 12, and controls the one or more light-emitting units based on the determined lighting conditions.

[0150] According to this, the lighting condition is determined according to the target value of the brightness at the predetermined position, so the user does not need to specify the lighting fixture that illuminates the predetermined position. The lighting control can be performed without paying attention to the existence of the lighting fixture, so the user convenience can be improved.

[0151] In addition, in the lighting control system involved in the A2 mode of the present invention, according to the lighting control system involved in the A1 mode, the control unit 13 determines the light-emitting unit to be lit among more than one light-emitting units based on the specified position, and determines the lighting conditions of the determined light-emitting unit.

[0152] According to this, the lighting condition is determined according to the target value of the brightness at the predetermined position, so the user does not need to specify the lighting fixture that illuminates the predetermined position. The lighting control can be performed without paying attention to the existence of the lighting fixture, so the user convenience can be improved.

[0153] In addition, in the lighting control system involved in the A3th mode of the present invention, according to the lighting control system involved in the A1th mode or the A2th mode, the acquisition unit 12 further obtains a target value of at least one of the size, shape and color of the lighting area that illuminates the specified position.

[0154] According to this, since the lighting conditions are determined not only based on the brightness but also based on the target values ​​of color and the like, it is possible to form a lighting state that better suits the user's wishes in the lighting space 100 .

[0155] In addition, in the lighting control system involved in mode A4 of the present invention, according to the lighting control system involved in any one of modes A1 to A3, the acquisition unit 12 obtains the target value of the brightness of each of a plurality of positions including a specified position in the lighting space 100, and the control unit 13 generates a brightness distribution in the lighting space 100 based on the target value of the brightness of each of the plurality of positions, and determines the lighting condition based on the generated brightness distribution.

[0156] According to this, the brightness in the lighting space 100 can be set more finely, so that a lighting state that is more suitable for the user's desire can be formed in the lighting space 100.

[0157] In addition, the lighting control system involved in the A5th mode of the present invention is a lighting control system involved in any one of the A1th mode to the A4th mode, and includes a UI unit 11 that accepts operation input from a user, and an acquisition unit 12 obtains a target value based on the operation input accepted by the UI unit 11.

[0158] According to this, the user can set the lighting state such as the desired brightness by using the UI unit 11. In this case, the user can set the desired lighting location and the brightness, color, etc. of the location without paying attention to the existence of the lighting fixture. Therefore, more intuitive lighting control can be performed, which can further improve user convenience.

[0159] In addition, the lighting control system involved in the A6th mode of the present invention is based on the lighting control system involved in the A5th mode, and the UI unit 11 includes a display unit, which displays a display area 210 defined by a two-dimensional coordinate system, and the two-dimensional coordinates in the display area 210 correspond to the position in the lighting space 100.

[0160] According to this, since the display area 210 corresponds to the lighting space 100, by selecting a position in the display area 210, it is possible to perform lighting control of a place corresponding to the selected position. Therefore, it is possible to perform lighting control with better intuitiveness.

[0161] In addition, the lighting control system involved in the A7th mode of the present invention includes the plan layout of the lighting space 100 or the image of the lighting space 100 as a background image in the display area 210 according to the lighting control system involved in the A6th mode.

[0162] According to this, since the plan layout or the photographic image is included as the background image, it is possible to easily associate the actual lighting space 100 , and to perform lighting control with better intuitiveness.

[0163] In addition, in the lighting control system involved in the A8 mode of the present invention, according to the lighting control system involved in the A6 mode or the A7 mode, the display unit displays the icon in the display area 210 according to the operation input, and the two-dimensional coordinates of the icon in the display area 210 correspond to the specified position.

[0164] According to this, by using icons, the position where lighting control is desired can be displayed intuitively and easily. Therefore, lighting control with better intuitiveness can be performed.

[0165] In addition, the lighting control system involved in the A9th mode of the present invention is, according to the lighting control system involved in any one of the A1th mode to the A8th mode, provided with a sensor unit 20 for detecting a specified object within the lighting space 100, and the acquisition unit 12 determines a specified position based on the object detected by the sensor unit 20, and obtains a target value of the brightness of the determined specified position.

[0166] According to this, even when there is no operation input from the user, it is possible to perform lighting control based on the detection result by the sensor unit 20. By reducing the operations required by the user, user convenience can be further improved.

[0167] In addition, the lighting control system involved in the A10th mode of the present invention is based on the lighting control system involved in the A1th mode to the A9th mode, and the one or more lighting fixtures include multiple lighting fixtures 31A to 31D, and each of the multiple lighting fixtures 31A to 31D illuminates different areas.

[0168] According to this, existing general lighting fixtures can be used. Since no special lighting fixtures or the like are required, the lighting control system according to this embodiment can be easily introduced.

[0169] In addition, the lighting control system according to the A11th aspect of the present invention is the lighting control system according to any one of the A1th to A10th aspects, wherein the one or more lighting fixtures include the lighting fixture 40 , and the lighting fixture 40 has a plurality of light emitting units.

[0170] According to this, the lighting state can be changed individually for each area by the lighting fixture 40. Since the number of lighting fixtures to be installed can be reduced, the lighting control system according to the present embodiment can be easily introduced.

[0171] In addition, the lighting control system involved in the A12th mode of the present invention is based on the lighting control system involved in the A1th mode to the A11th mode, and the one or more lighting fixtures include a lighting fixture 50, and the lighting fixture 50 has an adjustment unit 51, which adjusts the emission direction of the lighting light from the one or more light-emitting units 52.

[0172] According to this, the lighting state can be changed individually for each area by the lighting fixture 40. Since the number of lighting fixtures to be installed can be reduced, the lighting control system according to the present embodiment can be easily introduced.

[0173] In addition, the terminal device involved in the A13th mode of the present invention is, for example, the above-mentioned terminal device 10, and the terminal device 10 includes: a control unit 13 that controls one or more light-emitting units of one or more lighting fixtures; a UI unit 11 that receives operation input from a user, and an acquisition unit 12 that obtains a target value of brightness of a predetermined position in the lighting space 100 illuminated by one or more lighting fixtures based on the operation input received by the UI unit 11. The one or more light-emitting units emit illumination light, and the illumination light illuminates different areas in the lighting space 100. The control unit 13 determines the lighting conditions of the one or more light-emitting units based on the target value obtained by the acquisition unit 12, and controls the one or more light-emitting units based on the determined lighting conditions.

[0174] According to this, the lighting condition is determined according to the target value of the brightness at the predetermined position, so the user does not need to specify the lighting fixture that illuminates the predetermined position. The lighting control can be performed without paying attention to the existence of the lighting fixture, so the user convenience can be improved.

[0175] In addition, the lighting control method involved in the A14th aspect of the present invention includes, for example, a step of controlling one or more light-emitting units of one or more lighting fixtures; and a step of obtaining a target value indicating the brightness of a predetermined position in the lighting space 100 illuminated by the one or more lighting fixtures. The one or more light-emitting units emit illumination light that illuminates mutually different areas in the lighting space 100, and in the step of controlling, a lighting condition of the one or more light-emitting units is determined based on the obtained target value, and the one or more light-emitting units are controlled based on the determined lighting condition.

[0176] According to this, the lighting condition is determined according to the target value of the brightness at the predetermined position, so the user does not need to specify the lighting fixture that illuminates the predetermined position. The lighting control can be performed without paying attention to the existence of the lighting fixture, so the user convenience can be improved.

[0177] Furthermore, the program according to the A15th aspect of the present invention is a program that causes a computer to execute the lighting control method according to the A14th aspect.

[0178] According to this, similar to the above-mentioned lighting control method, user convenience can be improved.

[0179] (other)

[0180] The lighting control system, terminal device, lighting control method, etc. involved in the present invention have been described above based on the above-mentioned embodiments, etc., but the present invention is not limited to the above-mentioned embodiments.

[0181] For example, the lighting space 100 may include a plurality of rooms. For example, the first area 110, the second area 120, and the third area 130 may correspond to different rooms, and may be areas separated by walls or partitions. Furthermore, the lighting space 100 may be an outdoor space. In this case, the lighting fixtures 31A to 31D, 40, and 50 may be fixed to pillars or the like.

[0182] Furthermore, for example, each of the lighting fixtures 31A to 31D, 40, and 50 may include a plurality of light emitting units. When each lighting fixture includes a plurality of light emitting units, the plurality of light emitting units may not be arranged two-dimensionally.

[0183] In addition, for example, the lighting control system 1 may include only one of the lighting fixture group 30, the lighting fixture 40, and the lighting fixture 50. That is, the lighting control system 1 may not include the lighting fixture group 30. The lighting control system 1 may not include the lighting fixture 40. The lighting control system 1 may not include the lighting fixture 50. For example, when the lighting control system 1 includes the lighting fixture 50 but does not include the lighting fixture group 30 and the lighting fixture 40, by changing the emission direction of the lighting light from one light emitting unit 52, multiple areas can be illuminated.

[0184] In addition, the terminal device 10 may not have the UI unit 11. In this case, the acquisition unit 12 or the control unit 13 of the terminal device 10 can automatically set the target value of the lighting area and the brightness based on the detection result based on the sensor unit 20. For example, the acquisition unit 12 or the control unit 13 can set the lighting area in a manner that only illuminates the object detected by the sensor unit 20. In addition, the acquisition unit 12 or the control unit 13 can also establish a corresponding table corresponding to the target value of the brightness and / or color according to the type, position, size and / or shape of the object, and set the brightness and / or color of the lighting area from the type of the object detected by the sensor unit 20. The correspondence table is stored in a memory of the acquisition unit 12 or the control unit 13, or in a memory of an external device such as a server with which the acquisition unit 12 or the control unit 13 can communicate. Therefore, even if the UI unit 11 is not provided, the lighting control can be automatically performed, so that a lighting control system with high user convenience can be realized.

[0185] In addition, the terminal device 10 may include a sensor unit 20. For example, a user may use the sensor unit 20 of the terminal device 10 to photograph an object such as a painting in the lighting space 100, thereby setting the object as a lighting area and lighting it. Since there is no need to set a sensor unit 20 that can cover the entire lighting space 100, the lighting control system 1 can be introduced more simply.

[0186] In addition, for example, the object detected by the sensor unit 20 may be a person, an animal such as a pet, or a moving object such as an autonomous vacuum cleaner. For example, the sensor unit 20 may detect the action of a person. In the lighting control system 1, when a person takes a prescribed action, the surroundings of the person can be automatically illuminated. For example, when the sensor unit 20 detects that a person has entered the lighting space 100, the position information of the person who has entered is continuously sent to the acquisition unit 12. The acquisition unit 12 and the control unit 13 control the lighting device group 30 and the like so as to illuminate the range including the position indicated by the sent position information. Thus, the lighting area can be automatically changed in a manner that follows the movement of the person. In addition, the action detected by the sensor unit 20 is not limited to the movement of a person, and may be, for example, the sitting or leaving of a person at a specific table or chair. The following lighting control can be performed, in which the table or chair is illuminated when the sitting is detected, or the lighting of the table or chair is stopped when the leaving is detected.

[0187] In addition, for example, the wireless communication between the terminal device 10 and the sensor unit 20, the lighting fixture group 30, the lighting fixtures 40 and 50 may be near-field wireless communication such as ZigBee (registered trademark) or a wireless LAN (Local Area Network). Alternatively, the method of wireless communication (communication standard) may be communication via a wide area communication network such as the Internet. Furthermore, wired communication may be performed between the terminal device 10 and the sensor unit 20, the lighting fixture group 30, the lighting fixtures 40 and 50 instead of wireless communication, or in addition to wireless communication. Specifically, wired communication is communication using power line communication (PLC: Power Line Communication) or a wired LAN.

[0188] (Implementation Method 2)

[0189] [summary]

[0190] Next, Embodiment 2 will be described.

[0191] In the lighting device disclosed in Patent Document 3, part of the light emitted from the light source is blocked by the light modulation element and cannot be used as lighting light, which causes a problem of reduced light energy efficiency.

[0192] Therefore, an object of the present embodiment is to provide a lighting device, a lighting system and a control method of the lighting device with high light energy efficiency.

[0193] An illumination device according to one embodiment of the present disclosure includes: a light source having a plurality of light-emitting elements arranged in a two-dimensional array; a driving circuit for driving the light source; a projection lens for projecting light emitted by the light source driven by the driving circuit as illumination light; and a signal processing unit for determining one or more target surfaces based on a signal output from a detection device having at least a portion of a projection range based on the projection lens as a detection range, wherein the driving circuit drives the light source so that the illumination light illuminates the one or more target surfaces determined by the signal processing unit in the projection range based on the projection lens. In addition, as the detection device, for example, an image sensor having a plurality of pixels arranged in a two-dimensional array or other distance measuring devices can be used.

[0194] A lighting system according to one aspect of the present disclosure includes the lighting device according to the above-mentioned one aspect and the detection device.

[0195] A control method for a lighting device involved in one embodiment of the present invention includes: a step of determining one or more target surfaces based on a signal output from a detection device that uses at least a portion of a projection range based on the projection lens as a detection range, and a step of causing the driving circuit to drive the light source in such a manner that the illumination light is used to illuminate the one or more target surfaces determined by the determining step in the projection range based on the projection lens.

[0196] Furthermore, one aspect of the present disclosure can be implemented as a program that causes a computer to execute the above-described method for controlling a lighting device, or can be implemented as a computer-readable non-transitory recording medium storing the program.

[0197] [Lighting system]

[0198] First use Fig.12 An overview of the lighting system according to the second embodiment will be described. Fig.12 It is a diagram showing a usage status of the lighting system 310 involved in this embodiment.

[0199] like Fig.12 As shown, the lighting system 310 includes a lighting device 400 and a distance measuring device 500. The lighting device 400 and the distance measuring device 500 are located at locations separated from each other, and are connected to each other via a network so as to be able to communicate with each other.

[0200] The lighting device 400 projects illumination light to illuminate the plurality of target surfaces 331, 332, 333, 334, and 335. Specifically, the lighting device 400 can selectively illuminate only the target surfaces 331, 332, 333, 334, and 335 within the projection range of the illumination light. The lighting device 400 is fixed to, for example, a ceiling in a room or a wall near the ceiling.

[0201] The distance measuring device 500 generates an image by photographing the projection range of the illumination light. The target surfaces 331, 332, 333, 334, and 335 are determined based on the image generated by the distance measuring device 500. The target surfaces 331, 332, 333, 334, and 335 are surfaces parallel to the floor surface 320 of the building or the ground. For example, the target surfaces 331, 332, 333, 334, and 335 are the upper surfaces of a table, which are used by people when they work or study. By illuminating the upper surfaces of the table, i.e., the target surfaces 331, 332, 333, 334, and 335, by the lighting device 400, the work efficiency can be improved.

[0202] The distance measuring device 500 is fixed to, for example, a ceiling in a room or a wall near the ceiling. The distance measuring device 500 and the lighting device 400 can be arranged at positions close to each other. The imaging range of the distance measuring device 500 includes at least a portion of the projection range of the illumination light illuminated by the lighting device 400. In this embodiment, a case where the imaging range of the distance measuring device 500 includes the entire projection range of the illumination light is described.

[0203] The details will be described later, but the lighting device 400 according to the present embodiment includes a light source having a plurality of light emitting elements arranged in a two-dimensional array. The lighting device 400 can selectively illuminate only the target surfaces 331, 332, 333, 334, and 335 in the projection range by lighting only some of the plurality of light emitting elements and turning off the others. Since the illumination light of the light emitting elements that are lit is efficiently used and the light emitting elements that do not need to be illuminated are turned off, the light energy efficiency can be improved.

[0204] [lighting device]

[0205] Next, regarding the specific configuration of the lighting device 400 according to the present embodiment, reference will be made as appropriate to the following. Fig.12 , while using Fig.13 as well as Fig.14 Provide explanation.

[0206] Fig.13 It is a block diagram showing the configuration of a lighting system 310 according to the present embodiment. Fig.14 It is a schematic perspective view of a lighting device 400 according to this embodiment.

[0207] like Fig.13 As shown in FIG. 4 , the lighting device 400 includes a light source 410, a projection lens 420, a drive circuit 430, a communication unit 440, a signal processing unit 450, and a storage unit 460. Fig.14 As shown, the lighting device 400 includes a frame 470. In addition, the lighting device 400 is, for example, one of a plurality of lighting fixtures included in the lighting control system 1 according to Embodiment 1. Specifically, the lighting device 400 corresponds to the lighting fixture 40. More specifically, the lighting circuit 41 of the lighting fixture 40 corresponds to the driving circuit 430. The array light source 43 of the lighting fixture 40 corresponds to the light source 410. The plurality of light emitting elements (light emitting units) 42 correspond to the plurality of light emitting elements 411.

[0208] The light source 410 has a plurality of light emitting elements 411 arranged in a two-dimensional array. The light source 410 emits light by being driven by a driving circuit 430. Specifically, each of the plurality of light emitting elements 411 is controlled to be turned on and off independently of each other by the driving circuit 430. For example, the driving circuit 430 turns on only the light emitting elements 411 required to illuminate the target surfaces 331, 332, 333, 334, and 335, and turns off the light emitting elements 411 that do not illuminate the target surfaces 331, 332, 333, 334, and 335. Thus, power consumption can be reduced.

[0209] For example, among the plurality of light emitting elements 411 arranged in a two-dimensional array, all the light emitting elements 411 included in a range of a predetermined shape are turned on, so that illumination light for illuminating an area of ​​the same shape is projected through the projection lens 420. Furthermore, for example, by turning on all the light emitting elements 411 included in each of a plurality of non-overlapping ranges, Fig.12 The illumination light for illuminating the target surfaces 331, 332, 333, 334, and 335 is projected from the projection lens 420. That is, the outer shape of the lighting range of the plurality of light emitting elements 411 in the two-dimensional array becomes the shape of the illumination area illuminated by the illumination light. In addition, the illumination area when all the plurality of light emitting elements 411 arranged in the two-dimensional array are lit is the projection range of the illumination light projected by the projection lens 420. For example, the projection range is Fig.12 Floor surface 320 is shown.

[0210] Each of the plurality of light emitting elements 411 is a μLED, which is a microscopic LED having a size of 100 μm×100 μm or less.

[0211] The μLED emits light by the current supplied from the driving circuit 430. The μLED includes, for example, a blue LED and a yellow phosphor disposed on the light emitting side of the blue LED. A portion of the blue light emitted by the blue LED excites the yellow phosphor, thereby emitting yellow light. The μLED emits white light which is a mixture of blue light and yellow light.

[0212] A plurality of light emitting elements 411 are mounted on a substrate. The substrate is a rigid substrate here, but may also be a flexible substrate. A pattern wiring is provided on the substrate, and the pattern wiring is used to electrically connect each of the plurality of light emitting elements 411 to the driving circuit 430.

[0213] The plurality of light emitting elements 411 are arranged in a planar area of ​​a predetermined size on the substrate, with 256×256 pieces. The planar area where the light emitting elements 411 are arranged is, for example, a rectangular area of ​​3 mm×3 mm. The number of light emitting elements 411 and the size of the area where they are arranged are merely examples and are not particularly limited. By arranging the plurality of light emitting elements 411 in a narrow area, it is possible to miniaturize the projection lens 420 or improve the efficiency of introducing light.

[0214] In addition, the light source 410 has a dimming function and a color adjustment function. For example, each of the plurality of light emitting elements 411 changes the light emission intensity according to the amount of current provided from the driving circuit 430. In addition, for example, the plurality of light emitting elements 411 may include a plurality of μLEDs that emit white light of different color temperatures. By adjusting the light emission intensity of the plurality of μLEDs, the light source 410 can emit white light of a desired color temperature.

[0215] In addition, the plurality of light emitting elements 411 may include a red LED emitting red light, a green LED emitting green light, and a blue LED emitting blue light. Thus, the light source 410 can emit colored light other than white light.

[0216] The projection lens 420 projects the light emitted from the light source 410 driven by the driving circuit 430 as illumination light. The projection lens 420 is composed of a plurality of lenses, but may be composed of a single lens.

[0217] The driving circuit 430 drives the light source 410. Specifically, the driving circuit 430 controls the lighting, extinguishing, and light intensity of each of the multiple light-emitting elements 411. The driving circuit 430 is implemented by, for example, an ASIC (Application Specific Integrated Circuit). The driving circuit 430 provides a current that has been PWM (Pulse Width Modulation) to each of the multiple light-emitting elements 411. The pulse width of the current provided is adjusted according to each light-emitting element 411, thereby changing the light intensity of each light-emitting element 411, thereby realizing a dimming function. In addition, the dimming method is not particularly limited, and it can be an amplitude modulation or phase modulation method, etc.

[0218] In the present embodiment, the driving circuit 430 drives the light source 410 to illuminate the target surfaces 331, 332, 333, 334, and 335 determined by the signal processing unit 450. Specifically, the driving circuit 430 determines the plurality of light emitting elements 411 corresponding to the target surfaces 331, 332, 333, 334, and 335 based on the corresponding information 461 stored in the storage unit 460, and adjusts the current supplied to the determined plurality of light emitting elements 411.

[0219] The communication unit 440 communicates with the distance measuring device 500 to obtain the captured image. The communication unit 440 communicates with the distance measuring device 500 wirelessly. Specifically, the communication unit 440 communicates with the distance measuring device 500 using BLE (Bluetooth (registered trademark) Low Energy) or Wi-Fi (registered trademark). The communication unit 440 is implemented, for example, by an antenna and a wireless processing circuit that processes the signal received by the antenna. In addition, the communication unit 440 can communicate with the distance measuring device 500 by wire.

[0220] The signal processing unit 450 identifies a plurality of object planes 331, 332, 333, 334, and 335 in the image obtained from the distance measuring device 500. In the present embodiment, the image is a distance image representing the distance of each pixel. Specifically, the distance image represents the distance from the distance measuring device 500 to the object represented by the pixel for each pixel.

[0221] The signal processing unit 450 extracts one or more surfaces parallel to the floor surface 320 or the ground from the distance image. For example, when the distance measuring device 500 is installed on the ceiling and the viewing angle (camera range) is also fixed, the floor surface 320 in the distance image can be estimated based on the distance from the ceiling surface to the floor surface 320 and the viewing angle. Therefore, the signal processing unit 450 can extract the surface parallel to the floor surface 320 from the distance image based on the estimated floor surface 320. In addition, when the installation position or viewing angle of the distance measuring device 500 can be changed, the floor surface 320 included in the changed distance image is estimated. The estimation process of the floor surface 320 can be performed by performing AI (Artificial Intelligence) processing on the distance image.

[0222] The signal processing unit 450 compares the height from the floor surface 320 or the ground with the first threshold value for one or more extracted surfaces. The signal processing unit 450 determines one or more surfaces having a height above the first threshold value as one or more target surfaces. The first threshold value is a predetermined lower limit value of the height, for example, 60 cm. The height of the working surface (the upper surface of the table) when working is usually performed while sitting on a chair is considered to be 85 cm. Therefore, by setting the first threshold value to 60 cm, the upper surface of the table can be used as the target surface. In addition, when working while sitting on the floor surface 320 of a Japanese-style room, etc., the height of the working surface (the upper surface of the table) is considered to be 40 cm. Therefore, for example, by setting the first threshold value to 30 cm, the upper surface of the table can be used as the target surface. The specific value of the first threshold value can be appropriately changed according to the type of space in which the lighting device 400 is installed.

[0223] The signal processing unit 450 can compare the height from the floor surface 320 or the ground with the third threshold value for one or more extracted surfaces. In this case, the signal processing unit 450 determines one or more surfaces having a height above the first threshold value and below the third threshold value as one or more target surfaces. The third threshold value is a predetermined upper limit value of the height, for example, 150 cm. By determining the upper limit value of the height, the possibility of determining a surface that cannot be used as a working surface, such as the upper surface of a bookshelf, as a target surface can be reduced. In addition, the signal processing unit 450 may not compare the first threshold value, but may determine one or more surfaces having a height below the third threshold value as one or more target surfaces.

[0224] In addition, the signal processing unit 450 compares the area of ​​the extracted one or more faces with the second threshold. The signal processing unit 450 determines one or more faces having an area greater than the second threshold as one or more target faces. The second threshold is a predetermined lower limit of the area, for example, 2500 cm2 , but not limited to this. A surface with an area smaller than the second threshold, such as a seat of a chair or a part of an electronic product, is a surface different from a work surface. By excluding such narrow surfaces from the target surface, energy saving can be achieved.

[0225] The signal processing unit 450 may compare the area of ​​the one or more extracted surfaces with the fourth threshold. In this case, the signal processing unit 450 determines the one or more surfaces having an area greater than the second threshold and less than the fourth threshold as one or more target surfaces. The fourth threshold is a predetermined upper limit of the area, for example, 10,000 cm 2 By determining the upper limit of the area, even without comparing the height with the threshold, the possibility of determining a wide surface such as the floor surface 320 as the target surface can be reduced. In addition, the signal processing unit 450 may determine one or more surfaces having an area below the fourth threshold as one or more target surfaces without comparing with the second threshold.

[0226] In this embodiment, the signal processing unit 450 compares both the height and the area of ​​the one or more extracted surfaces. Specifically, the signal processing unit 450 determines one or more surfaces having a height greater than a first threshold and an area greater than a second threshold as one or more target surfaces. Alternatively, the signal processing unit 450 may also determine one or more surfaces having a height greater than the first threshold and less than a third threshold and an area greater than the second threshold and less than a fourth threshold as one or more target surfaces.

[0227] In this way, the signal processing unit 450 determines the surface that has a height above the floor surface 320 or the ground that is a predetermined value (or a predetermined range) and has an area above the predetermined value (or a predetermined range) as the target surface for illumination. Thus, it is possible to illuminate the target surface for work such as the top surface of a table while not illuminating the portion other than the target surface. For example, Fig.12 As shown, the lighting device 400 can illuminate the target surfaces 331 , 332 , 333 , 334 , and 335 , but does not illuminate the floor surface 320 .

[0228] In addition, one or more surfaces extracted by the signal processing unit 450 are actually flat surfaces. On the upper surface of the table, objects such as a display, keyboard, mouse, writing supplies, and smart phones may be placed. The signal processing unit 450 excludes such objects and compares the areas by treating them as flat surfaces. Thus, the signal processing unit 450 can determine the entire upper surface of the table including the objects placed on the upper surface of the table as the target surface, and can perform lighting from the lighting device 400.

[0229] In addition, the signal processing unit 450 can determine whether the outer shape (outer contour shape) of one or more extracted surfaces is a specified shape. The specified shape is a shape of a common table surface such as a square, rectangle, circle or ellipse. When the outer shape of one or more extracted surfaces is a specified shape, the signal processing unit 450 can determine the one or more surfaces as the target surface. Thus, even if an object is placed on one or more surfaces, the entire surface of the table can be determined as the target surface by using the outer shape.

[0230] The signal processing unit 450 determines the light emitting element 411 to be turned on among the plurality of light emitting elements 411 included in the light source 410 based on the determined one or more target surfaces. Specifically, the signal processing unit 450 reads the corresponding information 461 stored in the storage unit 460 and determines the light emitting element 411 to be turned on using the read corresponding information 461.

[0231] The correspondence information 461 shows the correspondence between the plurality of light emitting elements 411 and the plurality of pixels 511 of the image sensor 510. Specifically, the pixels 511 and the light emitting elements 411 correspond to each other in a one-to-one, one-to-many, or many-to-one manner.

[0232] Fig.15A as well as Fig. 15B Each of them is a diagram showing an example of the correspondence information 461 stored in the storage unit 460 of the lighting device 400 according to the present embodiment. Fig.15A The illustrated correspondence information 461 shows an example in which the light emitting elements 411 (μLEDs) and the pixels 511 correspond one-to-one. Fig. 15B The correspondence information 461 shown in FIG. 4 shows an example in which the light emitting elements 411 (μLEDs) correspond to the pixels 511 in a one-to-many manner. Fig.15A as well as Fig. 15B In the embodiment, the light emitting element 411 and the pixel 511 are respectively represented in the plane coordinates, and the corresponding relationship is shown in the form of a table, but it is not limited to this. As long as the corresponding relationship between the light emitting element 411 and the pixel 511 can be known, the form of the information is not particularly limited.

[0233] When one or more light emitting elements 411 corresponding to one pixel 511 are turned on, the area corresponding to the one pixel 511 can be illuminated. Therefore, by turning on one or more light emitting elements 411 corresponding to the plurality of pixels 511 included in the target surface determined by the signal processing unit 450, the target surface can be illuminated. Therefore, the signal processing unit 450 determines the one or more light emitting elements 411 corresponding to the plurality of pixels 511 included in the determined target surface as the light emitting elements 411 to be turned on.

[0234] The signal processing unit 450 sends a signal to the driving circuit 430 to light up the determined light emitting element 411. For example, the signal processing unit 450 outputs arrangement data including data representing the light emission intensity of each light emitting element 411 in 8 bits for each row of the plurality of light emitting elements 411. The driving circuit 430 controls the plurality of light emitting elements 411 based on the arrangement data output from the signal processing unit 450.

[0235] The information processing unit 450 is implemented, for example, by an integrated circuit (IC: Integrated Circuit), namely LSI (Large Scale Integration). In addition, the integrated circuit is not limited to LSI, and may also be a dedicated circuit or a general-purpose processor. For example, the signal processing unit 450 may be a microcontroller. The signal processing unit 450 includes, for example: a non-volatile memory storing a program, a temporary storage area for executing the program, namely a volatile memory, an input and output port, a processor for executing the program, etc. In addition, the signal processing unit 450 may adopt a programmable FPGA (Field Programmable Gate Array) or a reconfigurable processor that can reconfigure the connection and settings of the circuit units inside the LSI. The functions performed by the signal processing unit 450 may be implemented by software or by hardware.

[0236] The storage unit 460 stores the corresponding information 461. The storage unit 460 is, for example, a nonvolatile storage device such as a HDD (Hard Disk Drive) or an SSD (Solid State Drive).

[0237] The frame 470 accommodates the light source 410, the projection lens 420, the drive circuit 430, the communication unit 440, the signal processing unit 450, and the storage unit 460. The frame 470 includes, for example, a housing frame constituting the housing of the lighting device 400, and a plurality of components such as a heat sink, but is not particularly limited. The components constituting the frame 470 are formed using resin or metal. In addition, the communication unit 440, the signal processing unit 450, and the storage unit 460 can be arranged outside the frame 470. For example, the signal processing unit 450 and the storage unit 460 can be set in other computer devices, and the other computer devices are servers connected via the communication unit 440 in a manner that allows communication.

[0238] In the frame 470, an opening is provided on the light emitting side (normal direction of the main surface of the substrate) of the light source 410, and a projection lens 420 is arranged to block the opening. There is no need to provide a liquid crystal device or a DMD (Digital Mirror Device) in the frame 470 as in a general projector, so that the lighting device 400 can be miniaturized.

[0239] In this embodiment, the lighting device 400 is, for example, a spotlight, which is installed in a wiring device (for example, a wiring tube, a hanging ceiling lamp holder) provided on a ceiling or a wall. The lighting device 400 may also be a downlight, a ceiling lamp, or the like.

[0240] The illumination light projected from the projection lens 420 of the illumination device 400 configured as described above is as follows. Fig.12 As shown, the plurality of target surfaces 331, 332, 333, 334, and 335 are illuminated. At this time, the light source 410 turns on only a portion of the plurality of light emitting elements 411, and turns off the remaining light emitting elements 411. For example, among the plurality of light emitting elements 411, only the light emitting elements 411 included in the mutually separated circular range or rectangular range are turned on, and the remaining light emitting elements 411 are turned off, so that the circular target surfaces 331, 332, and 335 and the rectangular target surfaces 333 and 334 can be illuminated. That is, by adjusting the position, shape, and size of the range (lighting range) including the light emitting element 411 to be turned on, which is a light emitting element among the plurality of light emitting elements 411 included in the light source 410, the position, shape, and size of the area illuminated by the illumination light (illumination area) can be adjusted. Furthermore, by adjusting the light emission intensity of the light emitting element 411 included in the lighting range, the brightness and color of the illumination area can be adjusted. In addition, since a rectangular opening is provided at the center of the target surface 335, the lighting device 400 does not need to irradiate the opening with illumination light. By accurately determining the shape of the target surface 335, it is possible to further contribute to energy saving.

[0241] Thus, the lighting device 400 according to the present embodiment can illuminate the plurality of target surfaces 331, 332, 333, 334, and 335 with a single lighting device (equipment). Furthermore, the light emitting elements 411 not used for lighting are turned off, thereby reducing power consumption.

[0242] Here, although the shapes of the target surfaces 331, 332, 333, 334, and 335 are shown as rectangles and circles, the shapes are not limited thereto. The shapes of the target surfaces 331, 332, 333, 334, and 335 may be polygons such as triangles, or predetermined geometric shapes such as ellipses.

[0243] [Distance measuring device]

[0244] Next, regarding the distance measuring device 500 according to the present embodiment, reference will be made as appropriate. Fig.12 , and use Fig.13 to explain.

[0245] The distance measuring device 500 is an example of a detection device that uses at least a part of the projection range of the projection lens 420 as a detection range. Fig.13 As shown, the distance measuring device 500 includes an image sensor 510, a distance measuring light source 520, and a transmitting unit 530. Fig.12 As shown, the distance measuring device 500 is fixed on, for example, a ceiling surface or a wall surface near the ceiling.

[0246] The image sensor 510 includes a plurality of pixels 511 arranged in a two-dimensional array and a signal processing circuit 512. The image sensor 510 is a ToF (Time of Flight) or stereo distance image sensor. In the case of a stereo distance image sensor, the distance measuring device 500 may not include the distance measuring light source 520.

[0247] Each of the plurality of pixels 511 is a photoelectric conversion element that is sensitive to the wavelength of light used for distance measurement (e.g., infrared wavelength). The photoelectric conversion element is, for example, a photodiode, a photosensitive transistor, etc., but is not particularly limited. Each of the plurality of pixels 511 outputs an electrical signal having a signal level corresponding to the intensity of the received light.

[0248] The signal processing circuit 512 generates a distance image based on the electrical signal output from each pixel 511. Specifically, the distance to the object corresponding to each pixel 511 is calculated in a ToF manner based on the time when the distance measurement light source 520 emits the distance measurement light and the time when each pixel 511 receives the reflected light of the distance measurement light. Thus, a distance image containing distance information as the pixel value of each pixel 511 can be generated. In addition, the distance image is an example of a signal output by the detection device, and is an image indicating the distance between each pixel and the detection device.

[0249] The distance measurement light source 520 is a light source that emits light for distance measurement. The distance measurement light is, for example, infrared light. The distance measurement light source 520 is, for example, an LED or a laser element that emits infrared light, but is not limited thereto.

[0250] The transmitter 530 transmits the image generated by the image sensor 510 to the lighting device 400. Specifically, the transmitter 530 communicates with the communication unit 440 of the lighting device 400 via BLE or Wi-Fi. The transmitter 530 is implemented by, for example, an antenna and a wireless processing circuit that processes a signal received by the antenna.

[0251] As described above, since the distance image is used in this embodiment, it is advantageous from the viewpoint of protecting privacy.

[0252] [Work]

[0253] Next, regarding the operation of the lighting system 310 involved in this embodiment, Fig.16 To explain.

[0254] Fig.16 This is a flowchart showing the operation of the lighting system 310 according to the present embodiment.

[0255] like Fig.16 As shown, first, the image sensor 510 of the distance measuring device 500 generates a distance image (S110). Specifically, the distance measuring light source 520 emits light for distance measuring, and the image sensor 510 receives the reflected light of the distance measuring light. The signal processing circuit 512 calculates the distance for each pixel 511 in a ToF manner, thereby generating a distance image. The generated distance image is transmitted by the transmitting unit 530 and obtained by the communication unit 440 of the lighting device 400.

[0256] Next, the signal processing unit 450 of the lighting device 400 extracts one or more surfaces parallel to the floor surface 320 or the ground from the distance image ( S120 ). Next, the signal processing unit 450 specifies one or more target surfaces from the extracted one or more surfaces ( S130 ).

[0257] Fig.17 FIG. 4 is a flowchart showing the process of determining the target surface in the operation of the lighting system 310 according to the present embodiment. Fig.17 As shown, first, the signal processing unit 450 selects a surface from the extracted surfaces (S131). Next, the signal processing unit 450 estimates the height of the selected surface (S132). Specifically, the signal processing unit 450 calculates the distance from the floor surface 320 based on the distance information of each pixel 511 constituting the selected surface.

[0258] Next, the signal processing unit 450 compares the height of the selected surface with the threshold value Ht (S133). The threshold value Ht is an example of a first threshold value. When the height of the surface is less than the threshold value Ht ("No" in S133), the selected surface is deemed not to be the target surface, and the process proceeds to step S137.

[0259] When the height of the surface is greater than or equal to the threshold value Ht (Yes in S133), the signal processing unit 450 estimates the area of ​​the selected surface (S134). Specifically, the signal processing unit 450 calculates the area of ​​the selected surface based on the number of pixels 511 included in the selected surface and the viewing angle of the distance measuring device 500.

[0260] Next, the signal processing unit 450 compares the area of ​​the selected surface with the threshold value St (S135). The threshold value St is an example of a second threshold value. When the area of ​​the surface is smaller than the threshold value St ("No" in S135), the selected surface is deemed not to be the target surface, and the process proceeds to step S137.

[0261] When the area of ​​the selected surface is greater than or equal to the threshold value St ("Yes" in S135), the signal processing unit 450 determines the selected surface as the target surface (S136). Through the determination in steps S133 and S135, the signal processing unit 450 can determine one or more surfaces having a height greater than or equal to the threshold value Ht from the floor surface 320 or the ground and having an area greater than or equal to the threshold value St as the target surface.

[0262] In addition, the estimation and comparison of the area (S134 and S135) may be performed before the estimation and comparison of the height (S132 and S133). In addition, the upper limit value of at least one of the height and the area may be compared as described above.

[0263] Next, the signal processing unit 450 determines whether there is a surface that has not been selected in step S131 among the one or more extracted surfaces (S137). If there is an unselected surface ("Yes" in S137), the process returns to step S131 and repeats the above process. If the process for all extracted surfaces is completed ("No" in S137), the process proceeds to step S131. Fig.16 Step S140.

[0264] Back to Fig.16 After the target surface is determined, the signal processing unit 450 determines a plurality of light emitting elements 411 corresponding to the target surface based on the corresponding information 461 (S140).

[0265] Next, the driving circuit 430 drives the light source 410 (S150). Specifically, the driving circuit 430 supplies a desired current to the light emitting element 411 to be turned on among the plurality of light emitting elements 411 so as to illuminate only the target surface determined by the signal processing unit 450. No current is supplied to the light emitting element 411 not to be turned on.

[0266] Next, the light emitted by the light emitting element 411 turned on by supplying current is projected as illumination light by the projection lens 420 (S160). Thus, the illumination device 400 can illuminate an area having the same shape as the outer shape of the lighting range in the two-dimensional array.

[0267] The above-described operations are merely examples, and the order may be changed.

[0268] [Modifications]

[0269] Next, a description will be given of modified examples of the lighting system 310 and the lighting device 400. In the following description, the differences from the above-described embodiment will be mainly described, and the description of the common points will be omitted or simplified.

[0270] Fig.18 is a block diagram showing the structure of the lighting device 401 involved in the modification example 1. Fig.18 As shown, the lighting device 401 and Fig.13 The lighting device 400 shown in FIG. 1 is different from the lighting device 400 in that an image sensor 510 and a distance-measuring light source 520 are provided instead of the communication unit 440. Fig.13 The lighting device 400 and the distance measuring device 500 shown are integrated into one frame 470 .

[0271] This makes it easy to fix the relationship between the imaging range of the distance measuring device 500 and the projection range from the lighting device 400, and thus it is easy to fix the correspondence between the plurality of pixels 511 and the plurality of light emitting elements 411. Therefore, the identified target surface can be irradiated with illumination light with high accuracy.

[0272] Fig.19 2 is a block diagram showing the structure of the lighting system 311 involved in Modification Example 2. Fig.19 As shown, the lighting system 311 includes one distance measuring device 500 and a plurality of lighting devices 400A to 400N. Each of the lighting devices 400A to 400N has the same configuration as the lighting device 400 according to the second embodiment.

[0273] In other words, in the lighting system 311 involved in this modification, the distance image generated by one distance measuring device 500 is shared by a plurality of lighting devices 400A to 400N. For example, this is useful when the imaging range of the distance image generated by the distance measuring device 500 is wide, but the projection range of the lighting devices 400A to 400N is narrow. In this way, it is not necessary to prepare a distance measuring device for each lighting device, so the configuration of the lighting system 311 can be simplified.

[0274] [Summarize]

[0275] As described above, the lighting device according to the B1 embodiment of the present invention is, for example, the lighting device 400 or 401 described above, and includes: a light source 410 having a plurality of light-emitting elements 411 arranged in a two-dimensional array; a driving circuit 430 that drives the light source 410; a projection lens 420 that projects light emitted by the light source 410 driven by the driving circuit 430 as illumination light; and a signal processing unit 450 that determines one or more target surfaces based on a signal output from a detection device that uses at least a portion of a projection range based on the projection lens 420 as a detection range. The driving circuit 430 drives the light source 410 so that the illumination light illuminates one or more target surfaces determined by the signal processing unit 450 in the projection range based on the projection lens 420. For example, the detection device includes an image sensor 510 having a plurality of pixels 511 arranged in a two-dimensional array. The signal processing unit 450 determines one or more target surfaces from an image generated by the image sensor 510.

[0276] For example, in a common projector, a portion of the light from the light source is blocked by a liquid crystal device or a DMD, so that illumination can be performed in a predetermined mode (different illumination is performed for each area). However, the blocked light cannot be used for illumination, so a portion of the light energy is wasted. In contrast, with the lighting device involved in this embodiment, among the plurality of light emitting elements 411, the light emitting element 411 that is not useful for illuminating the target surface can be turned off. Thus, a lighting device with high light energy efficiency can be realized.

[0277] Furthermore, the lighting device of the present embodiment can automatically determine the target surface, so that even when a table is moved due to a change in the indoor layout, the upper surface of the table after the move can be illuminated. There is no need to manually set the target surface for illumination, so even when there are many target surfaces or the shapes are complex, illumination can be performed simply, thereby improving user convenience.

[0278] In addition, for example, in the lighting device according to the B2 embodiment of the present invention, according to the lighting device according to the B1 embodiment, the detection device outputs a distance image as a signal, and the distance image shows the distance between each pixel and the detection device. For example, the image sensor 510 generates a distance image as an image, and the distance image shows the distance of each pixel 511.

[0279] According to this, for example, a distance image sensor using infrared light can be used as the image sensor 510. Since an image based on visible light such as a color image or a black-and-white image is not generated, privacy can be protected.

[0280] In addition, for example, the lighting device involved in the B3th mode of the present invention, according to the lighting device involved in the B1th mode or the B2th mode, has a storage unit 460, which stores corresponding information 461, and the corresponding information 461 shows the correspondence between multiple light-emitting elements 411 and multiple pixels 511.

[0281] According to this, the light emitting element 411 to be turned on can be easily determined by using the corresponding information 461. Since the lighting control of the light emitting element 411 can be easily performed, a lighting device with excellent responsiveness can be realized.

[0282] In addition, for example, in the lighting device involved in the B4th aspect of the present invention, according to the lighting device involved in any one of the B1st aspect to the B3rd aspect, one or more target surfaces are surfaces parallel to the floor surface 320 or the ground.

[0283] According to this, a work surface such as the upper surface of a desk can be illuminated as a target surface. By illuminating the work surface, work efficiency can be improved.

[0284] In addition, for example, in the lighting device involved in the B5th mode of the present invention, according to the lighting device involved in the B4th mode, the signal processing unit 450 extracts one or more surfaces parallel to the floor surface 320 or the ground from the distance image showing the distance between each pixel and the detection device, and for each of the one or more extracted surfaces, the height from the floor surface 320 or the ground is compared with a threshold value, and one or more surfaces having a height above the first threshold value are determined as one or more object surfaces.

[0285] According to this, since it is difficult to identify surfaces other than the upper surface of the table as target surfaces, it is possible to suppress the illumination light from being projected onto unnecessary surfaces, thereby improving the light energy efficiency.

[0286] In addition, for example, in the lighting device involved in the B6th mode of the present invention, according to the lighting device involved in the B5th mode, the signal processing unit 450 further compares the area of ​​each of the one or more extracted surfaces with the second threshold value, and determines one or more surfaces having a height greater than the first threshold value and an area greater than the second threshold value as one or more object surfaces.

[0287] According to this, since it is more difficult to identify surfaces other than the upper surface of the table as target surfaces, the light energy efficiency can be further improved.

[0288] In addition, for example, in the lighting device according to the B7th aspect of the present invention, the lighting device according to any one of the B1th aspect to the B6th aspect, each of the plurality of light-emitting elements 411 is a micro light-emitting diode, namely, μLED.

[0289] According to this, since the light source 410 can be miniaturized, the entire device can also be miniaturized.

[0290] In addition, for example, the lighting system involved in the B8th mode of the present invention is, for example, the above-mentioned lighting system 310, and the lighting system includes: the lighting device involved in any one of the B1th to B7th modes, and a detection device. For example, the lighting system involved in this mode includes an image sensor 510 as a detection device.

[0291] According to this, similar to the above-mentioned lighting device 400, a lighting system with high light energy efficiency can be realized.

[0292] Furthermore, for example, the control method of the lighting device according to the B9th aspect of the present invention includes: a step of determining one or more target surfaces based on a signal output from a detection device having at least a portion of a projection range based on a projection lens 420 as a detection range; and a step of causing the drive circuit 430 to drive the light source 410 in such a manner that the one or more target surfaces determined in the determining step are illuminated with illumination light in the projection range based on the projection lens 420. For example, in the step of determining the target surface, the one or more target surfaces are determined in an image generated by an image sensor 510 having a plurality of pixels 511 arranged in a two-dimensional array.

[0293] According to this, similar to the lighting device 400 described above, a method for controlling a lighting device with high light energy efficiency can be realized.

[0294] (other)

[0295] The lighting device, the lighting system, and the lighting device control method according to the present invention have been described above based on the above-mentioned embodiments and the like. However, the present invention is not limited to the above-mentioned embodiments.

[0296] For example, in the above embodiment, the light emitting element 411 is an example of a μLED, but the present invention is not limited thereto. The light emitting element 411 may be an LED of a normal size, an organic EL element, or a laser element.

[0297] In addition, for example, the light source 410 may not have at least one of the dimming function and the color adjustment function. For example, each of the plurality of light emitting elements 411 may be controlled only to be turned on and off, and the light emission intensity when turned on may remain constant.

[0298] For example, in the above embodiment, an example in which the image generated by the image sensor 510 is a distance image is shown, but it is not limited to this. The image may also be an ordinary color image or a black and white image in which each pixel value represents the intensity of the incident light. In this case, the signal processing unit 450 can estimate the distance to the object projected in the image by performing AI (Artificial Intelligence) processing on the color image or the black and white image. As the image sensor 510, an ordinary visible light image sensor can be used, so the lighting system 310 can be constructed at a low price. Alternatively, an existing device such as a surveillance camera can be used as the distance measuring device 500.

[0299] In addition, for example, a distance measuring device 500 having an image sensor 510 is shown as a detection device, but it is not limited to this. For example, the detection device may be a device using a method other than visible light. For example, the detection device may be a LiDAR (Light Detection And Ranging), an ultrasonic sensor or an electric wave sensor, or a composite sensor combining these multiple sensors. These sensors are more useful from the perspective of protecting privacy.

[0300] In addition, for example, the illuminated object surface may not be a surface parallel to the floor surface or the ground surface. The object surface may be a surface that satisfies the conditions predetermined for determining it as an illuminated object. For example, the object surface may be a surface perpendicular to the floor surface or the ground surface, specifically, the surface of a wall or a column. Alternatively, the object surface may be a part of the floor surface or the ground surface, or a part of the ceiling surface.

[0301] For example, the lighting system 310 and the lighting device 400 may not illuminate the work surface, but illuminate the exhibits, etc. For example, the lighting device 400 may determine a range including paintings hung on the wall as a target surface and illuminate it.

[0302] In addition, for example, the lighting system 310 may also include a plurality of distance measuring devices 500. The imaging ranges of the plurality of distance measuring devices 500 may overlap in part, but at least in part they do not overlap with each other. The imaging range of the plurality of distance measuring devices 500 as a whole (a range that includes the imaging ranges of the plurality of distance measuring devices) includes the projection range of each of the lighting device 400 or the plurality of lighting devices 400A to 400N.

[0303] In addition, the processing performed by a specific processing unit in the above-mentioned embodiment may be performed by another processing unit. Also, the order of multiple processing may be changed, or multiple processing may be performed in parallel. Furthermore, the allocation of the components of the lighting control system 1 or the lighting system 310 to multiple devices is an example. For example, the components of one device may be provided by another device.

[0304] For example, the processing described in the above embodiments may be implemented by centralized processing using a single device (system) or distributed processing using multiple devices. Furthermore, the processors that execute the above programs may be single or multiple. That is, centralized processing or distributed processing may be performed.

[0305] In addition, all or part of the components such as the control unit in the above-mentioned embodiment may also be formed by dedicated hardware, or implemented by executing a software program suitable for each component. Each component may be implemented by a program execution unit such as a CPU (Central Processing Unit) or a processor, reading and executing a software program recorded in a recording medium such as a HDD (Hard Disk Drive) or a semiconductor memory.

[0306] Furthermore, components such as the control unit may be composed of one or more electronic circuits. Each of the one or more electronic circuits may be a general-purpose circuit or a dedicated circuit.

[0307] One or more electronic circuits may include, for example, semiconductor devices, ICs or LSIs. ICs or LSIs may be integrated on one chip or on multiple chips. Although they are referred to as ICs or LSIs herein, they may be referred to differently depending on the degree of integration, and may also be referred to as system LSIs, VLSIs (Very Large Scale Integration), or ULSIs (Ultra Large Scale Integration). Furthermore, FPGAs that can be programmed after LSIs are manufactured may also be used for the same purpose.

[0308] In addition, the general or specific aspects of the present invention may be implemented by a system, device, method, integrated circuit or computer program. Or it may be implemented by a computer-readable non-temporary recording medium such as an optical disk, HDD or semiconductor memory storing the computer program. Furthermore, it may also be implemented by any combination of a system, device, method, integrated circuit, computer program and recording medium.

[0309] Other forms obtained by implementing various modifications conceived by those skilled in the art for each embodiment, as well as forms achieved by arbitrarily combining the constituent elements and functions in each embodiment without departing from the spirit of the present invention, are all included in the present invention.

[0310] Description of Reference Numerals

[0311] 1 Lighting control system

[0312] 10 Terminal Devices

[0313] 11 UI Department

[0314] 12 Obtaining Department

[0315] 13. Control Unit

[0316] 20 Sensor unit

[0317] 30 lighting equipment group

[0318] 31A, 31B, 31C, 31D, 40, 50 Lighting fixtures

[0319] 32A, 32B, 32C, 32D, 52 Light-emitting part

[0320] 41 Lighting circuit

[0321] 42 Light emitting element (light emitting part)

[0322] 42A, 42B, 42C Lighting elements in lamps

[0323] 43 Array light source

[0324] 51 Adjustment Department

[0325] 90 operating body

[0326] 100 Lighting Space

[0327] 110 First Area

[0328] 120 Second Area

[0329] 121A, 121B, 121C lighting area

[0330] 130 Third Area

[0331] 200 Operation screen

[0332] 210 Display domain

[0333] 211A, 211B, 211C, 214A, 214B, 214C, 216A, 216B, 216C Icon

[0334] 212 Photographic images

[0335] 213 Layout Image

[0336] 215 Illuminance distribution image

[0337] 221 Resize operation object

[0338] 222 Brightness adjustment operation object

[0339] 223 Color Adjustment Operation Objects

[0340] 240 Add button

[0341] 250 Delete button

[0342] 310, 311 Lighting System

[0343] 320 Floor

[0344] 331, 332, 333, 334, 335 Object surface

[0345] 400, 401 lighting fixtures

[0346] 410 Light Source

[0347] 411 Light Emitting Element

[0348] 420 Projection Lens

[0349] 430 drive circuit

[0350] 450 Signal Processing Department

[0351] 460 Storage

[0352] 461 Correspondence Information

[0353] 500 Distance measuring device

[0354] 510 Image Sensor

[0355] 511 pixels

Claims

1. A lighting control system, The lighting control system comprises: One or more lighting fixtures having one or more light-emitting parts; a control unit that controls the one or more light-emitting units; and an obtaining unit that obtains position information indicating a predetermined position in a space illuminated by the one or more lighting fixtures and a target value of brightness at the predetermined position, The one or more light emitting units emit illumination light, and the illumination light illuminates different areas in the space. The control unit determines lighting conditions of the one or more light-emitting units based on the target value obtained by the obtaining unit, and controls the one or more light-emitting units based on the determined lighting conditions.

2. The lighting control system according to claim 1, The control unit determines the light-emitting unit to be turned on among the one or more light-emitting units based on the specified position, and determines the lighting conditions of the determined light-emitting unit.

3. The lighting control system according to claim 2, The obtaining unit further obtains a target value of at least one of a size, a shape, and a color of an illumination area that illuminates the predetermined position.

4. The lighting control system according to any one of claims 1 to 3, The obtaining unit obtains a target value of brightness at each of a plurality of positions including the predetermined position in the space, The control unit generates a brightness distribution in the space based on a target value of brightness at each of the plurality of positions, and determines the lighting condition based on the generated brightness distribution.

5. The lighting control system according to any one of claims 1 to 3, The lighting control system includes a user interface unit that receives operation input from a user. The obtaining unit obtains the target value based on an operation input received by the user interface unit.

6. The lighting control system according to claim 5, The user interface unit includes a display unit, and the display unit displays a display area defined by a two-dimensional coordinate system. The two-dimensional coordinates in the display area correspond to the positions in the space.

7. The lighting control system according to claim 6, The display area includes a plan layout of the space or a captured image of the space as a background image.

8. The lighting control system according to claim 6, The display unit displays an icon in the display area according to the operation input, The two-dimensional coordinates of the icon in the display area correspond to the prescribed position.

9. The lighting control system according to any one of claims 1 to 3, The lighting control system includes a sensor unit configured to detect a predetermined object in the space. The obtaining unit determines the predetermined position based on the object detected by the sensor unit, and obtains a target value of brightness at the determined predetermined position.

10. The lighting control system according to any one of claims 1 to 3, The one or more lighting fixtures include a plurality of first lighting fixtures, Each of the plurality of first lighting fixtures illuminates a different area.

11. The lighting control system according to any one of claims 1 to 3, The one or more lighting fixtures include a second lighting fixture, The second lighting fixture has a plurality of the light emitting sections.

12. The lighting control system according to any one of claims 1 to 3, The one or more lighting fixtures include a third lighting fixture, The third lighting fixture includes an adjustment unit that adjusts an emission direction of the illumination light from the one or more light emitting units.

13. The lighting control system according to claim 1, At least one of the one or more lighting fixtures comprises: A light source having a plurality of said light emitting parts; A driving circuit for driving the light source; a projection lens for projecting light emitted by the light source driven by the driving circuit as the illumination light; as well as a signal processing unit for determining one or more target surfaces based on a signal output from a detection device having at least a portion of a projection range based on the projection lens as a detection range, The plurality of light emitting units are a plurality of light emitting elements arranged in a two-dimensional array. The driving circuit drives the light source so that the illumination light illuminates the one or more target surfaces determined by the signal processing unit in a projection range based on the projection lens.

14. The lighting control system according to claim 13, The detection device outputs a distance image as the signal, the distance image indicating the distance between each pixel and the detection device.

15. The lighting control system according to claim 14, The lighting control system includes a storage unit that stores correspondence information indicating a correspondence relationship between the plurality of light emitting elements and pixels of the distance image.

16. The lighting control system according to any one of claims 13 to 15, The one or more target surfaces are surfaces parallel to the floor surface or the ground surface.

17. The lighting control system according to claim 16, The signal processing unit extracts one or more surfaces parallel to the floor surface or the ground from a distance image showing the distance between each pixel and the detection device, and for each of the one or more extracted surfaces, compares the height from the floor surface or the ground with a first threshold value, and determines one or more surfaces having a height above the first threshold value as the one or more object surfaces.

18. The lighting control system according to claim 17, The signal processing unit further compares the area of ​​each of the one or more extracted surfaces with a second threshold value, and identifies one or more surfaces having a height greater than the first threshold value and an area greater than the second threshold value as the one or more target surfaces.

19. The lighting control system according to any one of claims 13 to 15, Each of the plurality of light emitting elements is a micro light emitting diode, namely, μLED, where LED is a Light Emitting Diode.

20. A terminal device, The terminal device comprises: A control unit controls one or more light-emitting units of one or more lighting fixtures; A user interface unit that receives operation input from a user; and an obtaining unit that obtains position information indicating a predetermined position in a space illuminated by the one or more lighting fixtures and a target value of brightness at the predetermined position based on an operation input received by the user interface unit, The one or more light emitting units emit illumination light, and the illumination light illuminates different areas in the space. The control unit determines lighting conditions of the one or more light-emitting units based on the target value obtained by the obtaining unit, and controls the one or more light-emitting units based on the determined lighting conditions.

21. A lighting control method, The lighting control method comprises: A step of controlling one or more light-emitting parts of one or more lighting fixtures; as well as a step of obtaining position information indicating a predetermined position in a space illuminated by the one or more lighting fixtures and a target value of brightness at the predetermined position, The one or more light emitting units emit illumination light, and the illumination light illuminates different areas in the space. In the step of controlling, lighting conditions of the one or more light-emitting units are determined based on the obtained target value, and the one or more light-emitting units are controlled based on the determined lighting conditions.

22. A program for causing a computer to execute the lighting control method according to claim 21.

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