Display system, program, and control device

Abstract

To improve the visibility of a projection image of a projector while securing the brightness of a first lighting device and a second lighting device.SOLUTION: A display system 1 includes a first lighting device 200A, a second lighting device 200E, and a control device 400 which controls a projector 100. The control device 400 determines, on the basis of first position information JP1 that indicates a first position P1 where the first lighting device 200A is placed, second position information JP2 that indicates a second position P2 where the second lighting device 200E is placed, prescribed position information JPC that indicates a prescribed position PC where the projector 100 projects a projection image PM, a first maximum light amount MC1 that indicates a maximum value of the light amount of the first lighting device 200A, a second maximum light amount MC2 that indicates a maximum value of the light amount of the second lighting device 200E and a dimming level VL, a correction value CV that indicates the degree of contrast correction for the projector 100.SELECTED DRAWING: Figure 6

Description

[Technical field]

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

[0002] For example, Patent Document 1 describes a technology for controlling the brightness and color temperature of a lighting device based on the sensing results of an image projected by a projector when the lighting device and the projector are installed in the same space. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent Publication No. 2021-22538 Summary of the Invention [Problem to be solved by the invention]

[0004] In the technology described in Patent Document 1, each of the multiple lighting devices adjusts the brightness and color temperature based on the sensing results of the projector, so the visibility of the image projected by the projector can be improved. However, there are cases where the lighting device is set to a dark setting, resulting in insufficient brightness in the space. As a result, it may be difficult to improve the visibility of the image projected by the projector while ensuring the brightness of the lighting device. [Means for solving the problem]

[0005] One aspect of the present disclosure is a display system including a first lighting device arranged at a first position on a ceiling, a second lighting device arranged at a second position on the ceiling different from the first position, a projector arranged at a specific position on the ceiling different from the first position and the second position, and projecting an image onto a predetermined position on a floor surface or a wall surface where at least a portion of the light from the first lighting device is incident, and a control device that controls the first lighting device, the second lighting device, and the projector, wherein the control device executes the following: acquiring first position information indicating the first position, second position information indicating the second position, and predetermined position information indicating the predetermined position; accepting a first maximum light amount indicating a maximum value of the light amount of the first lighting device and a second maximum light amount indicating a maximum value of the light amount of the second lighting device; accepting a dimming level for adjusting the light amount of the first lighting device and the light amount of the second lighting device; and determining a correction value indicating a degree of contrast correction of the projector based on the first position information, the second position information, the predetermined position information, the first maximum light amount, the second maximum light amount, and the dimming level.

[0006] Another aspect of the present disclosure is a program for controlling a first lighting device disposed at a first position on a ceiling, a second lighting device disposed at a second position on the ceiling different from the first position, and a projector disposed at the first position on the ceiling and at a specific position different from the second position, and projecting an image onto a predetermined position on a floor surface or a wall surface into which at least a portion of the light from the first lighting device is incident, the program causing a processor to execute the following: acquiring first position information indicating the first position, second position information indicating the second position, and predetermined position information indicating the predetermined position; accepting a first maximum light amount indicating a maximum value of the light amount of the first lighting device and a second maximum light amount indicating a maximum value of the light amount of the second lighting device; accepting a dimming level for adjusting the light amount of the first lighting device and the light amount of the second lighting device; and determining a correction value indicating a degree of contrast correction of the projector based on the first position information, the second position information, the predetermined position information, the first maximum light amount, the second maximum light amount, and the dimming level.

[0007] Yet another aspect of the present disclosure is a control device that controls a first lighting device arranged at a first position on a ceiling, a second lighting device arranged at a second position on the ceiling different from the first position, and a projector that is arranged at the first position on the ceiling and a specific position different from the second position, and projects an image onto a predetermined position on a floor surface or a wall surface into which at least a portion of the light from the first lighting device is incident, the control device including at least one processor, wherein the at least one processor executes the following: acquiring first position information indicating the first position, second position information indicating the second position, and predetermined position information indicating the predetermined position; accepting a first maximum light amount indicating a maximum value of the light amount of the first lighting device and a second maximum light amount indicating a maximum value of the light amount of the second lighting device; accepting a dimming level for adjusting the light amount of the first lighting device and the light amount of the second lighting device; and determining a correction value indicating a degree of contrast correction of the projector based on the first position information, the second position information, the predetermined position information, the first maximum light amount, the second maximum light amount, and the dimming level. [Brief description of the drawings]

[0008] [Figure 1] FIG. 1 is a diagram showing an example of the configuration of a display system according to an embodiment. [Diagram 2] FIG. 2 is a plan view showing an example of an arrangement of projectors and lighting devices. [Diagram 3] 4 is a graph showing an example of light distribution characteristics of a lighting device. [Figure 4] FIG. 2 is a side view showing an example of an arrangement of a projector and a lighting device. [Diagram 5] FIG. 1 illustrates an example of the configuration of a projector. [Figure 6] FIG. 2 is a diagram showing an example of the configuration of a control device according to the present embodiment. [Figure 7] 11 is a graph showing an example of contrast correction. [Figure 8] 11 is a graph showing an example of the relationship between the degree of influence of lighting and the correction value of contrast correction. [Figure 9]11 is a graph showing an example of a relationship between a dimming level and a lighting influence degree. [Figure 10] 5 is a flowchart showing an example of processing by a control device. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] Hereinafter, the present embodiment will be described with reference to the drawings. 1 is a diagram showing an example of the configuration of a display system 1 according to this embodiment. The display system 1 includes a projector 100, a lighting device 200, a dimmer 300, and a control device 400. The control device 400 is configured to be able to communicate with the projector 100, the lighting device 200, and the dimmer 300 via a network NW. In this embodiment, the network NW is, for example, a local area network (LAN), but is not limited to this. The network NW may be, for example, a wide area network (WAN). The network NW may also be, for example, the Internet.

[0010] The projector 100 is placed at a specific position PP on the ceiling CL, and projects the image light PL onto, for example, a floor surface FL. The projector 100 also projects the image light PL so as to display a projection image PM at a predetermined position PC on the floor surface FL. The predetermined position PC indicates the center position of the projection image PM displayed on the floor surface FL. In this embodiment, a case will be described in which the projector 100 displays the projection image PM on a floor surface FL, but the present invention is not limited to this. The projector 100 may also display the projection image PM on a wall surface such as a side wall. The projected image PM corresponds to an example of an "image."

[0011] The lighting devices 200 are disposed on a ceiling CL and emit illumination light toward a floor surface FL. The lighting devices 200 include a first lighting device 200A, a second lighting device 200E, a third lighting device 200B, and a fourth lighting device 200F. The first illumination device 200A and the third illumination device 200B are included in a first group GR1, while the second illumination device 200E and the fourth illumination device 200F are included in a second group GR2. The first group GR1 and the second group GR2 will be further described with reference to FIGS.

[0012] The first lighting device 200A is disposed at a first position P1 on the ceiling CL. The maximum light amount of the first lighting device 200A is a first maximum light amount MC1. The second lighting device 200E is disposed at a second position P2 on the ceiling CL. The second position P2 is different from the first position P1. The maximum light amount of the second lighting device 200E is a second maximum light amount MC2. The third lighting device 200B is disposed at a third position P3 on the ceiling CL. The third position P3 is different from the first position P1 and the second position P2. The maximum light amount of the third lighting device 200B is a third maximum light amount MC3. The fourth lighting device 200F is disposed at a fourth position P4 on the ceiling CL. The fourth position P4 is different from the first position P1, the second position P2, and the third position P3. The maximum light amount of the fourth lighting device 200F is a fourth maximum light amount MC4. In this embodiment, the first maximum light amount MC1, the second maximum light amount MC2, the third maximum light amount MC3, and the fourth maximum light amount MC4 are the same as each other. The first position P1 to the fourth position P4 will be further described with reference to FIG.

[0013] The dimming device 300 accepts an operation from a user and sets a dimming level VL for adjusting the amount of light of the lighting device 200 in response to the operation. The dimming level VL is set to a value between "0" and "1", for example. When the dimming level VL is set to "0", the lighting device 200 is turned off. When the dimming level VL is set to "1", the lighting device 200 irradiates the illumination light with the maximum amount of light toward the floor surface FL. The dimming device 300 transmits the dimming level VL to the control device 400 every time the dimming level VL is adjusted.

[0014] The control device 400 is configured with, for example, a personal computer. The control device 400 also acquires first position information JP1 indicating the first position P1 and a first maximum light amount MC1 from the first lighting device 200A. The control device 400 also acquires second position information JP2 indicating the second position P2 and a second maximum light amount MC2 from the second lighting device 200E. The control device 400 also acquires third position information JP3 indicating the third position P3 and a third maximum light amount MC3 from the third lighting device 200B. The control device 400 also acquires fourth position information JP4 indicating the fourth position P4 and a fourth maximum light amount MC4 from the fourth lighting device 200F. The control device 400 determines a correction value CV indicating the degree of contrast correction of the projector 100 based on the first position P1, the second position P2, the specific position PP, the first maximum light amount MC1, the second maximum light amount MC2, and the dimming level VL. Then, the control device 400 transmits the correction value CV to the projector 100. The projector 100 executes contrast correction of the projected image PM based on the correction value CV.

[0015] In this embodiment, the control device 400 is connected to the projector 100, the lighting device 200, and the dimming device 300 via an Ethernet (registered trademark) cable or the like to enable wired communication, but may also be connected via Wi-Fi (registered trademark) or the like to enable wireless communication. In this embodiment, the control device 400 is configured as a personal computer, but the control device 400 may also be configured as a tablet terminal, a smartphone, or the like.

[0016] Next, the arrangement of the projector 100 and the lighting device 200 will be described with reference to Fig. 2. Fig. 2 is a plan view showing an example of the arrangement of the projector 100 and the lighting device 200. As shown in FIG. 2, in this embodiment, the illumination devices 200 are arranged around the projector 100 on a circumference centered on the specific position PP where the projector 100 is arranged.

[0017] The lighting devices 200 constituting the first group GR1 are arranged on a circumference of a circle with a radius HA centered on a specific position PP. The first group GR1 is composed of a first lighting device 200A, a third lighting device 200B, a lighting device 200C, and a lighting device 200D. The four lighting devices 200 constituting the first group GR1 are arranged at 90 degrees to each other. The lighting devices 200 constituting the second group GR2 are arranged on a circumference of a radius HE centered on the specific position PP. The radius HE is, for example, twice the radius HA. The second group GR2 is composed of a second lighting device 200E, a fourth lighting device 200F, a lighting device 200G, a lighting device 200H, a lighting device 200I, a lighting device 200J, a lighting device 200K, and a lighting device 200L. The eight lighting devices 200 constituting the second group GR2 are arranged at 45 degrees to each other.

[0018] 2, an X-axis and a Y-axis are set with a specific position PP as the origin. The X-axis extends in the left-right direction of the figure, and the Y-axis extends in the up-down direction of the figure. The positive direction of the X-axis indicates the right direction, and the positive direction of the Y-axis indicates the upward direction. The positions of the projector 100 and the lighting device 200 are represented by the X-coordinate and the Y-coordinate. For example, the specific position PP, which is the position of the projector 100, is represented as (0,0). Furthermore, for example, the first position P1, which is the position of the first illumination device 200A, is represented as (-HA,0). The second position P2, which is the position of the second illumination device 200E, is represented as (-HE,0). Furthermore, the third position P3, which is the position of the third illumination device 200B, is represented as (HA,0). The fourth position P4, which is the position of the fourth illumination device 200F, is represented as (HE,0).

[0019] Next, the light distribution characteristic of the lighting device 200 will be described with reference to Fig. 3. Fig. 3 is a graph showing an example of the light distribution characteristic of the lighting device 200. 3, the horizontal axis represents the angle φ, and the vertical axis represents the luminous intensity. In this embodiment, the lighting device 200 is placed on the ceiling CL and illuminates the floor surface FL. The lighting device 200 is placed facing the floor surface FL directly below the position where the lighting device 200 is placed. The angle φ is the angle with respect to the directly downward direction.

[0020] As shown in graph G1 of Fig. 3, the light amount of the illumination device 200 is a maximum value LM when the angle φ is "0 degrees", and decreases as the angle φ increases. For example, when the angle φ is an angle φN, the light amount of the illumination device 200 is an amount LN that is 1 / 100 of the maximum value LM. In this embodiment, for convenience, the angle φN is set to the spread angle of the illumination device 200. The angle φN is about 55 degrees. Graph G1 in Fig. 3 is represented by a light distribution function FH(φ). In other words, the light distribution function FH(φ) shows the light distribution characteristic shown in Fig. 3. The light distribution function FH(φ) will be further described with reference to Fig. 6.

[0021] Next, the arrangement of the projector 100 and the lighting device 200 will be described with reference to Fig. 4. Fig. 4 is a side view showing an example of the arrangement of the projector 100 and the lighting device 200. As shown in FIG. 4, the projector 100 is placed on a ceiling CL, and projects image light PL toward a floor surface FL to display a projection image PM on the floor surface FL.

[0022] A first illumination device 200A and a second illumination device 200E are disposed on the left side of the projector 100. The distance between the center position of the first illumination device 200A and the center position of the projector 100 coincides with the value of a radius HA. The distance between the center position of the second illumination device 200E and the center position of the projector 100 coincides with the value of a radius HE. The radius HE is, for example, twice the radius HA. A third illumination device 200B and a fourth illumination device 200F are disposed on the right side of the projector 100. The distance between the center position of the third illumination device 200B and the center position of the projector 100 coincides with the value of a radius HA. The distance between the center position of the fourth illumination device 200F and the center position of the projector 100 coincides with the value of a radius HE.

[0023] The first distance LA is the length of a line segment connecting the center position of the first illumination device 200A and the predetermined position PC. The line segment indicating the first distance LA is a line segment connecting the center position of the first illumination device 200A and the predetermined position PC. The predetermined position PC is the center position of the projected image PM. The second distance LE is the length of a line segment connecting the center position of the second illumination device 200E and the predetermined position PC. The line segment indicating the second distance LE is a line segment connecting the center position of the second illumination device 200E and the predetermined position PC. The first incident angle θA is the angle at which the light emitted from the first illumination device 200A is incident on the predetermined position PC. In other words, the first incident angle θA is the angle between a dashed line that passes through the center position of the projector 100 and extends in the vertical direction, and the line segment that indicates the first distance LA. The first incident angle θA also coincides with the angle between a dashed line that passes through the center position of the first illumination device 200A and extends in the vertical direction, and the line segment that indicates the first distance LA. The second incidence angle θE is the angle at which the light emitted from the second illumination device 200E is incident on the predetermined position PC. In other words, the second incidence angle θE is the angle between a dashed line that passes through the center position of the projector 100 and extends in the vertical direction and the line segment indicating the second distance LE. The second incidence angle θE also coincides with the angle between a dashed line that passes through the center position of the second illumination device 200E and extends in the vertical direction and the line segment indicating the second distance LE.

[0024] Moreover, the third incident angle θB is equal to the first incident angle θA. The third incident angle θB is the angle at which the light emitted from the third illumination device 200B is incident on the predetermined position PC. Moreover, the fourth angle of incidence θF coincides with the second angle of incidence θE. The fourth angle of incidence θF is the angle at which the light emitted from the fourth illumination device 200F is incident on the predetermined position PC.

[0025] 4 also shows angle φN. Angle φN is approximately 55 degrees. As described with reference to FIG. 3, when angle φ is angle φN, the light amount of illumination device 200 becomes light amount LN, which is 1 / 100 of maximum value LM.

[0026] Next, the configuration of the projector 100 will be described with reference to Fig. 5. Fig. 5 is a diagram showing an example of the configuration of the projector 100 according to this embodiment. 5, the projector 100 includes a projection unit 110 and a drive unit 120 that drives the projection unit 110. The projection unit 110 forms an optical image and projects image light PL onto a floor surface FL. In this embodiment, the projection unit 110 projects the image light PL corresponding to the projection image PM onto the floor surface FL. The projection unit 110 includes a light source unit 111, a light modulation device 112, and a projection optical system 113. The drive unit 120 includes a light source drive unit 121 and a light modulation device drive unit 122.

[0027] The light source unit 111 includes a light source 111A. The light source 111A is, for example, a solid-state light source such as an LED (Light Emitting Diode) or a laser light source. In this embodiment, the light source 111A of the light source unit 111 is a solid-state light source, but is not limited to this. The light source 111A of the light source unit 111 may be a lamp light source such as a halogen lamp, a xenon lamp, or an extra-high pressure mercury lamp.

[0028] The light source unit 111 may also include a reflector and an auxiliary reflector that guide the light emitted by the light source 111A to the light modulation device 112. Furthermore, the light source unit 111 may also include a lens group for improving the optical characteristics of the projected light, a polarizing plate, or a light control element that reduces the amount of light emitted by the light source on the path leading to the light modulation device 112. The light source driving unit 121 is connected to the internal bus 107, and controls the output of the light source by turning on and off the light source 111A of the light source unit 111 according to instructions from a first control unit 150 also connected to the internal bus 107.

[0029] The light modulation device 112 includes, for example, three liquid crystal panels 115 corresponding to the three primary colors of R, G, and B. R indicates red, G indicates green, and B indicates blue. That is, the light modulation device 112 includes a liquid crystal panel 115 corresponding to R light, a liquid crystal panel 115 corresponding to G light, and a liquid crystal panel 115 corresponding to B light. The light emitted by the light source unit 111 is separated into three color lights of RGB, and each color light is incident on a corresponding liquid crystal panel 115. Each of the three liquid crystal panels 115 is a transmissive liquid crystal panel, and generates a first image light by modulating the light passing through the liquid crystal panel 115. The first image light modulated after passing through each liquid crystal panel 115 is combined by a combining optical system such as a cross dichroic prism, and is output to the projection optical system 113. In this embodiment, the light modulation device 112 is described as having a transmissive liquid crystal panel 115 as a light modulation element, but is not limited to this. The light modulation element may be a reflective liquid crystal panel or a digital micromirror device.

[0030] The light modulation device 112 is driven by a light modulation device driving section 122. The light modulation device driving section 122 is connected to an image processing section 145. Image data corresponding to each of the primary colors R, G, and B is input to the light modulation device driving unit 122 from the image processing unit 145. The light modulation device driving unit 122 converts the input image data into a data signal suitable for the operation of the liquid crystal panel 115. The light modulation device driving unit 122 applies a voltage to each pixel of each liquid crystal panel 115 based on the converted data signal, and draws an image on each liquid crystal panel 115.

[0031] The projection optical system 113 includes a projection lens, a mirror, etc., which form an image of the incident image light PL on the floor surface FL. The projection optical system 113 also includes a zoom mechanism which enlarges or reduces the image projected onto the floor surface FL, a focus adjustment mechanism which adjusts the focus, and a lens shift mechanism which adjusts the projection direction of the image light PL.

[0032] The projector 100 further includes an operation unit 131, a remote control receiver 133, an input interface 135, a storage unit 137, a first communication interface 141, a frame memory 143, an image processing unit 145, and a first control unit 150. The input interface 135, the storage unit 137, the first communication interface 141, the image processing unit 145, and the first control unit 150 are connected to each other via an internal bus 107 so as to be able to communicate data with each other.

[0033] The operation unit 131 includes various buttons and switches provided on the surface of the housing of the projector 100, generates operation signals corresponding to the operations of these buttons and switches, and outputs the operation signals to the input interface 135. The input interface 135 includes a circuit that outputs the operation signals input from the operation unit 131 to the first control unit 150.

[0034] The remote control light receiving unit 133 receives an infrared signal transmitted from the remote control 5, and decodes the received infrared signal to generate an operation signal. The remote control light receiving unit 133 outputs the generated operation signal to the input interface 135. The input interface 135 includes a circuit that outputs the operation signal input from the remote control light receiving unit 133 to the first control unit 150.

[0035] The storage unit 137 is, for example, a magnetic recording device such as a hard disk drive (HDD), or a storage device using a semiconductor storage element such as a flash memory or a solid state drive (SSD). The storage unit 137 stores the program executed by the first control unit 150, the data processed by the first control unit 150, image data, and the like.

[0036] The first communication interface 141 is a communication interface that executes communication with the control device 400 in accordance with the Ethernet (registered trademark) standard. The first communication interface 141 includes a connector for connecting an Ethernet (registered trademark) cable, and an interface circuit for processing signals transmitted through the connector. The first communication interface 141 is an interface board having a connector and an interface circuit, and is connected to a main board on which the first processor 150A and the like of the first control unit 150 are mounted. Alternatively, the connector and interface circuit constituting the first communication interface 141 are mounted on the main board of the first control unit 150. The first communication interface 141 receives image data and the like from the control device 400.

[0037] The first control unit 150 includes a first memory 150B and a first processor 150A. The first memory 150B is a storage device that non-volatilely stores programs and data executed by the first processor 150A. The first memory 150B is configured by a semiconductor storage element such as a magnetic storage device or a flash ROM (Read Only Memory), or other types of non-volatile storage devices. The first memory 150B may also include a RAM (Random Access Memory) that configures a work area for the first processor 150A. The first memory 150B stores data processed by the first control unit 150, the first control program executed by the first processor 150A, and the like.

[0038] The first control unit 150 performs contrast correction corresponding to the correction value CV on the projection image PM in accordance with an instruction from the control device 400. The first control unit 150 receives the correction value CV from the control device 400. Contrast correction will be described with reference to FIG.

[0039] The first processor 150A may be configured as a single processor, or may be configured such that a plurality of processors function as the first processor 150A. The first processor 150A executes a first control program PG1 to control each part of the projector 100. For example, the first processor 150A outputs to the image processing part 145 an instruction to execute image processing corresponding to an operation accepted by the operation part 131 and the remote control 5, and parameters used in this image processing. The parameters include, for example, geometric correction parameters for correcting geometric distortion of an image projected on the floor surface FL. The first processor 150A also controls the light source driving part 121 to control the turning on and off of the light source part 111, and adjusts the output of the light source part 111, i.e., the amount of light.

[0040] The first processor 150A may be configured as a SoC (System on Chip) integrated with a part or all of the first memory 150B and other circuits. The first processor 150A may also be configured as a combination of a CPU (Central Processing Unit) that executes a program and a DSP (Digital Signal Processor) that executes a predetermined arithmetic process. All of the functions of the first processor 150A may be implemented in hardware, or may be configured using a programmable device.

[0041] The image processing unit 145 and the frame memory 143 can be configured, for example, by an integrated circuit. The integrated circuit includes a large-scale integration (LSI), an application specific integrated circuit (ASIC), and a programmable logic device (PLD). The PLD includes, for example, a field-programmable gate array (FPGA). Furthermore, an analog circuit may be included as part of the configuration of the integrated circuit, or a combination of a processor and an integrated circuit may be used. The combination of a processor and an integrated circuit is called a microcontroller (MCU), a system-on-a-chip (SoC), a system LSI, a chipset, or the like.

[0042] The image processing unit 145 expands the image data input from the first communication interface 141 into the frame memory 143. The frame memory 143 includes a plurality of banks. Each bank has a storage capacity capable of writing one frame's worth of image data. The frame memory 143 is configured, for example, by a Synchronous Dynamic Random Access Memory (SDRAM).

[0043] The image processing unit 145 performs image processing on the image data expanded in the frame memory 143, such as resolution conversion processing, resizing processing, distortion correction, shape correction processing, digital zoom processing, and adjustment of the color tone and brightness of the image. In addition, the image processing unit 145 generates a vertical synchronization signal by converting the input frame frequency of the vertical synchronization signal into a drawing frequency. The generated vertical synchronization signal is called an output synchronization signal. The image processing unit 145 outputs the generated output synchronization signal to the light modulation device driving unit 122.

[0044] Next, the configuration of the control device 400 will be described with reference to FIG. Fig. 6 is a diagram showing an example of the configuration of the control device 400 according to this embodiment. As shown in Fig. 6, the control device 400 includes a second control unit 410, a second operation mechanism 420, a second display mechanism 430, and a second communication interface 440. The second control unit 410 includes a second processor 410A, and a second memory 410B. The second control unit 410 controls the operation of each unit of the control device 400. Further, to the second control unit 410, a second operation mechanism 420, a second display mechanism 430, and a second communication interface 440 are connected.

[0045] The second operation mechanism 420 is connected to, for example, a mouse, a keyboard, etc., and receives operations from a user. The user is, for example, an operator of the control device 400. The second operation mechanism 420 generates an operation signal corresponding to the received operation, and outputs the generated operation signal to the second control unit 410. The second display mechanism 430 includes an LCD (Liquid Crystal Display) or the like, and displays various images on the LCD according to instructions from the second control unit 410. The second communication interface 440 includes a connector and an interface circuit, and is connected to the second control unit 410. In this embodiment, the second communication interface 440 is an interface for communicating with the projector 100, the lighting device 200, and the dimmer 300, for example, in accordance with the Ethernet (registered trademark) standard.

[0046] The second processor 410A is configured with a CPU, a DSP, a microcomputer, etc. The second processor 410A may be configured with multiple processors, or may be configured with a single processor. The second processor 410A may be hardware programmed to realize the functions of each unit described below. That is, the second processor 410A may be configured to have the second control program PG2 installed as a hardware circuit. In this case, for example, the second processor 410A is configured with an ASIC, an FPGA, or the like. In the following, a case will be described in which the second processor 410A executes the second control program PG2 to realize various functions of the second control unit 410. The second processor 410A corresponds to an example of a "processor."

[0047] The second memory 410B has a storage area for storing programs executed by the second processor 410A and data processed by the second processor 410A. The second memory 410B stores the second control program PG2 executed by the second processor 410A, and various image data, setting data, and the like related to the operation of the control device 400. The second memory 410B has a nonvolatile storage area that stores programs and data in a nonvolatile manner. The second memory 410B may include, for example, a ROM, HDD, SSD, etc., as the nonvolatile storage area. The second memory 410B may also include a volatile storage area and configure a work area that temporarily stores programs executed by the second processor 410A and data to be processed. The second memory 410B may include, for example, a RAM, etc., as the volatile storage area.

[0048] 6, the second control unit 410 includes an acquisition unit 411, a reception unit 412, a calculation unit 413, a determination unit 414, a second communication control unit 415, and a second information storage unit 416. Each of these units is realized by the second processor 410A executing the second control program PG2, for example, through cooperation between software and hardware. The second control program PG2 corresponds to an example of a "program."

[0049] In this embodiment, a case will be described in which the control device 400 includes an acquisition unit 411, a reception unit 412, a calculation unit 413, a determination unit 414, a second communication control unit 415, and a second information storage unit 416, but is not limited thereto. For example, a server device (not shown) may include the acquisition unit 411, the reception unit 412, the calculation unit 413, the determination unit 414, the second communication control unit 415, and the second information storage unit 416. For example, the processor of the server device may execute a control program to function as an acquisition unit 411, a reception unit 412, a calculation unit 413, a determination unit 414, and a second communication control unit 415. The processor of the server device may execute a control program to cause a memory of the server device to function as a second information storage unit 416. In this case, the server device corresponds to an example of a "control device." In this case, the control program of the server device corresponds to an example of the "program".

[0050] The second information storage unit 416 stores the first position information JP1, the second position information JP2, the predetermined position information JPC, and the specific position information JPP. The first position information JP1 indicates a first position P1 where the first lighting device 200A is placed. The second position information JP2 indicates a second position P2 where the second lighting device 200E is placed. The predetermined position information JPC indicates a predetermined position PC which is a position on the floor surface FL where the projector 100 projects the projection image PM. The specific position information JPP indicates a specific position PP where the projector 100 is placed. The first position information JP1, the second position information JP2, the predetermined position information JPC, and the specific position information JPP are acquired by the acquisition unit 411, and stored in the second information storage unit 416 by the acquisition unit 411. Further, the second information storage unit 416 stores third position information JP3 and fourth position information JP4. The third position information JP3 indicates a third position P3 where the third lighting device 200B is disposed. The fourth position information JP4 indicates a fourth position P4 where the fourth lighting device 200F is disposed. The third position information JP3 and the fourth position information JP4 are acquired by the acquisition unit 411 and stored in the second information storage unit 416 by the acquisition unit 411.

[0051] The second information storage unit 416 stores the first maximum light amount MC1 and the second maximum light amount MC2. The first maximum light amount MC1 and the second maximum light amount MC2 are received by the receiving unit 412 and stored in the second information storage unit 416 by the receiving unit 412. The second information storage unit 416 also stores the third maximum light amount MC3 and the fourth maximum light amount MC4. The third maximum light amount MC3 and the fourth maximum light amount MC4 are received by the receiving unit 412 and stored in the second information storage unit 416 by the receiving unit 412. In this embodiment, the values ​​of the first maximum light amount MC1, the second maximum light amount MC2, the third maximum light amount MC3, and the fourth maximum light amount MC4 are the same as each other. Second information storage unit 416 also stores dimming level VL. Dimming level VL is accepted by acceptance unit 412 and stored in second information storage unit 416 by acceptance unit 412.

[0052] The acquisition unit 411 acquires first position information JP1, second position information JP2, predetermined position information JPC, and specific position information JPP. The specific position information JPP indicates a specific position PP where the projector 100 is placed. The predetermined position information JPC indicates a predetermined position PC that is a position on the floor surface FL where the projector 100 projects the projection image PM. The first position information JP1 indicates a first position P1 where the first lighting device 200A is placed. The second position information JP2 indicates a second position P2 where the second lighting device 200E is placed. The acquisition unit 411 also acquires third position information JP3 and fourth position information JP4. The third position information JP3 indicates a third position P3 where the third illumination device 200B is disposed. The fourth position information JP4 indicates a fourth position P4 where the fourth illumination device 200F is disposed. As described with reference to FIG. 2, each of the specific position PP, the first position P1, the second position P2, the third position P3, and the fourth position P4 is represented by an X coordinate and a Y coordinate. The acquisition unit 411, for example, receives a user's operation on the second operation mechanism 420, and acquires the first position information JP1, the second position information JP2, the third position information JP3, the fourth position information JP4, and the specific position information JPP in accordance with the received operation. In addition, the acquisition unit 411 stores the first position information JP1, the second position information JP2, the third position information JP3, the fourth position information JP4, and the specific position information JPP in the second information storage unit 416.

[0053] The receiving unit 412 receives a first maximum light amount MC1, a second maximum light amount MC2, a third maximum light amount MC3, and a fourth maximum light amount MC4. The first maximum light amount MC1 indicates the maximum value of the light amount of the first lighting device 200A. In other words, for example, when the dimming level VL is set to "1" by the dimming device 300, the first lighting device 200A outputs the light amount of the first maximum light amount MC1. The second maximum light amount MC2 indicates the maximum value of the light amount of the second lighting device 200E. The third maximum light amount MC3 indicates the maximum value of the light amount of the third lighting device 200B. The fourth maximum light amount MC4 indicates the maximum value of the light amount of the fourth lighting device 200F. The receiving unit 412, for example, receives a user's operation on the second operating mechanism 420, and receives the first maximum light amount MC1, the second maximum light amount MC2, the third maximum light amount MC3, and the fourth maximum light amount MC4 in accordance with the received operation. The receiving unit 412 stores the first maximum light amount MC1, the second maximum light amount MC2, the third maximum light amount MC3, and the fourth maximum light amount MC4 in the second information storage unit 416.

[0054] Furthermore, the reception unit 412 receives the dimming level VL from the dimming device 300. The reception unit 412 receives the dimming level VL from the dimming device 300, for example, by communicating with the dimming device 300.

[0055] Moreover, the reception unit 412 receives a first priority PR1, which is a priority for the first group GR1, and a second priority PR2, which is a priority for the second group PR2. For example, when the second priority PR2 is higher than the first priority PR1, the calculation unit 413 sets the light intensity of the lighting devices 200 included in the second group GR2 to be greater than the light intensity of the lighting devices 200 included in the first group GR1.

[0056] The calculation unit 413 calculates a first distance LA and a first incident angle θA based on the first position P1 and the predetermined position PC. The first distance LA is the distance between the first position P1 and the predetermined position PC as shown in Fig. 4. The first incident angle θA is the angle at which the light irradiated from the first lighting device 200A is incident on the predetermined position PC as shown in Fig. 4.

[0057] Furthermore, the calculation unit 413 calculates a second distance LE and a second angle of incidence θE based on the second position P2 and the predetermined position PC. The second distance LE is the distance between the second position P2 and the predetermined position PC as shown in Fig. 4. The second angle of incidence θE is the angle at which the light irradiated from the second illumination device 200E is incident on the predetermined position PC as shown in Fig. 4.

[0058] Furthermore, the calculation unit 413 calculates a first amount of light CA based on the first maximum amount of light MC1 and the dimming level VL. The first amount of light CA is the amount of light of the first lighting device 200A. The first amount of light CA is calculated by the following formula (1). CA = MC1 × F1(VL) (1) The first function F1(VL) is a function of the dimming level VL. The first function F1(VL) is a function that determines the light intensity of the lighting devices 200 included in the first group GR1. Furthermore, the calculation unit 413 calculates the second amount of light CE based on the second maximum amount of light MC2 and the dimming level VL. The second amount of light CE is the amount of light of the second lighting device 200E. The second amount of light CE is calculated by the following formula (2). CE = MC2 × F2(VL) (2) The second function F2(VL) is a function of the dimming level VL. The second function F2(VL) is a function that determines the light intensity of the lighting devices 200 included in the second group GR2. In this embodiment, the first function F1(VL) and the second function F2(VL) are functions proportional to the dimming level VL.

[0059] Furthermore, calculation unit 413 calculates a third amount of light CB based on the third maximum amount of light MC3 and the dimming level VL. The third amount of light CB is the amount of light of third illumination device 200B. The third amount of light CB is calculated by the following formula (3). CB = MC3 × F1 (VL) (3) Furthermore, the calculation unit 413 calculates a fourth light amount CF based on the fourth maximum light amount MC4 and the dimming level VL. The fourth light amount CF is the light amount of the fourth illumination device 200F. The fourth light amount CF is calculated by the following formula (4). CF = MC4 × F2 (VL) (4)

[0060] Furthermore, when the second priority PR2 is higher than the first priority PR1, the calculation unit 413 sets the light intensity of the lighting devices 200 included in the second group GR2 to be greater than the light intensity of the lighting devices 200 included in the first group GR1. In other words, the calculation unit 413 sets the first function F1(VL) and the second function F2(VL) such that the light intensity of the lighting devices 200 included in the second group GR2 is greater than the light intensity of the lighting devices 200 included in the first group GR1.

[0061] Further, the calculation unit 413 calculates, based on the first distance LA, the first incident angle θA, and the first light amount CA, The first influence degree DA is calculated based on the amount of light emitted from the first lighting device 200A. The degree of influence of light on the visibility of the projected image PM projected at a given position PC is shown. The influence degree DA is calculated by the following formula (5). DA=CA×COS(θA)×FH(θA) / LA2 (5) Here, the light distribution function FH(θA) represents the light distribution characteristic of the lighting device 200 shown in FIG. The first distance LA and the first incident angle θA are determined based on the position of the first lighting device 200A and the distance from the ceiling CL. Distance from floor surface FL LP Therefore, the right-hand side of Equation (5) is calculated based on [COS( θA)×FH(θA) / LA2] is a constant. In other words, the first degree of influence DA is a function proportional to the first amount of light CA.

[0062] Furthermore, the calculation unit 413 calculates a second influence degree DE based on the second distance LE, the second incident angle θE, and the second light amount CE. The second influence degree DE indicates the degree of influence that the light irradiated from the second illumination device 200E has on the visibility of the projection image PM projected at the predetermined position PC. The second influence degree DE is calculated by the following formula (6). DE=CE×COS(θE)×FH(θE) / LE 2 (6) Here, the light distribution function FH(θE) represents the light distribution characteristic of the lighting device 200 shown in FIG. 3. The second distance LE and the second incident angle θE are calculated based on the position of the second lighting device 200E and the distance LP between the ceiling CL and the floor surface FL. Therefore, [COS(θE)×FH(θE) / LE 2 ] is a constant. In other words, the second degree of influence DE is a function proportional to the second amount of light CE.

[0063] Further, the calculation unit 413 calculates the lighting influence degree based on the first influence degree DA and the second influence degree DE. The illumination influence degree DT is calculated based on the light emitted from the first illumination device 200A and the light emitted from the second illumination device 200B. The light emitted from the illumination device 200E is used to improve the visibility of the projection image PM projected at the predetermined position PC. The lighting influence level DT is calculated using the following formula (7). DT = DA × α + DE × β (7) The coefficients α and β are Illumination device 200 This is the weighting determined based on the number of vehicles. Coefficient α , and the coefficient β are determined as shown below.

[0064] In this embodiment, as described with reference to Fig. 2, the illumination devices 200 are configured with four illumination devices 200 constituting the first group GR1 and eight illumination devices 200 constituting the second group GR2. Each of the four illumination devices 200 constituting the first group GR1 has an effect on the visibility of the projected image PM similar to that of the light irradiated from the first illumination device 200A. Each of the eight illumination devices 200 constituting the second group GR2 has an effect on the visibility of the projected image PM similar to that of the light irradiated from the second illumination device 200E. Therefore, in this embodiment, the illumination influence degree DT of the twelve illumination devices 200 is calculated by the following formula (8). DT=DA×4+DE×8 (8)

[0065] That is, equation (8) can be written as the following equation (9). DT=DG1+DG2 (9) Here, the first group influence degree DG1 indicates the degree of influence that the light emitted from the four lighting devices 200 constituting the first group GR1 has on the visibility of the projection image PM projected at the predetermined position PC. The second group influence degree DG2 indicates the degree of influence that the light emitted from the eight lighting devices 200 constituting the second group GR2 has on the visibility of the projection image PM projected at the predetermined position PC. The first group impact level DG1 and the second group impact level DG2 will be further described with reference to FIG.

[0066] The determination unit 414 determines a correction value CV indicating the degree of contrast correction of the projector 100 based on the first position information JP1, the second position information JP2, the predetermined position information JPC, the first maximum light amount MC1, the second maximum light amount MC2, and the dimming level VL. The determination unit 414 determines the correction value CV based on, for example, the first degree of influence DA and the second degree of influence DE. Furthermore, the determination unit 414 determines the correction value CV based on, for example, the illumination influence degree DT.

[0067] As will be described with reference to FIG. 8-FIG. 9, when the illumination influence DT calculated by the calculation unit 413 is greater than the maximum influence DTA, the determination unit 414 reduces the first influence DA and the second influence DE so that the illumination influence DT becomes the maximum influence DTA. The maximum influence DTA is the upper limit value of the illumination influence DT. The maximum influence DTA corresponds to the maximum correction value CVM. The maximum correction value CVM is the upper limit value of the correction value CV. When the correction value CV is greater than the maximum correction value CVM, the projection image PM cannot be properly corrected. In other words, when the illumination influence DT is greater than the maximum influence DTA, the determination unit 414 reduces the first light amount CA and the second light amount CE so that the illumination influence DT becomes the maximum influence DTA.

[0068] Furthermore, the determination unit 414 transmits the correction value CV to the projector 100, and causes the projector 100 to execute contrast correction corresponding to the correction value CV. Here, a method for determining the correction value CV will be described. The most appropriate correction value CV is determined by subjective evaluation by an evaluator. For example, when determining the correction value CV based on the first impact degree DA and the second impact degree DE, the most appropriate correction value CV is determined by subjective evaluation by an evaluator depending on the combination of the values ​​of the first impact degree DA and the second impact degree DE.

[0069] Furthermore, the determination unit 414 transmits the first amount of light CA to the four lighting devices 200 constituting the first group GR1, and causes each of the four lighting devices 200 to output the first amount of light CA. Furthermore, the determination unit 414 transmits the second amount of light CE to the eight lighting devices 200 constituting the second group GR2, and causes each of the eight lighting devices 200 to output the second amount of light CE. A method of correcting the contrast of the projector 100 will be described with reference to FIG.

[0070] The second communication control unit 415 receives the dimming level VL from the dimming device 300. Moreover, the second communication control unit 415 transmits a correction value CV to the projector 100. Moreover, the second communication control unit 415 transmits a first light amount CA to the four lighting devices 200 that make up the first group GR1. Moreover, the second communication control unit 415 transmits a second light amount CE to the eight lighting devices 200 that make up the second group GR2.

[0071] Next, contrast correction of the projector 100 will be described with reference to FIG. 7. FIG. 7 is a graph showing an example of contrast correction. The horizontal axis of FIG. 7 indicates the luminance value Yin of the input image PI, and the vertical axis of FIG. 7 indicates the luminance value Yout of the projection image PM. The input image PI corresponds to the projection image PM before contrast correction is performed. Each of the luminance value Yin and the luminance value Yout has, for example, a minimum value of "0" and a maximum value of "1024". The luminance value Yin is the luminance value of a pixel that constitutes the input image PI, and the luminance value Yout is the luminance value of a pixel that constitutes the projected image PM.

[0072] As shown in FIG. 7, when the correction value CV of the contrast correction is "0", the luminance value Yout coincides with the luminance value Yin, as shown in graph G21. In this embodiment, the contrast correction is, for example, a correction that increases luminance values ​​mainly in the low to medium luminance range of the input image PI.

[0073] As shown in FIG. 7, as the correction value CV of the contrast correction increases, the luminance value Yout of the pixel corresponding to the luminance value Yin increases as shown in graphs G22 to G25. Graph G22 shows the relationship between the luminance value Yin of the input image PI and the luminance value Yout of the projected image PM when the correction value CV is "0.3". Graph G23 shows the relationship between the luminance value Yin of the input image PI and the luminance value Yout of the projected image PM when the correction value CV is "0.6". Graph G24 shows the relationship between the luminance value Yin of the input image PI and the luminance value Yout of the projected image PM when the correction value CV is "1.0". Graph G25 shows the relationship between the luminance value Yin of the input image PI and the luminance value Yout of the projected image PM when the correction value CV is "1.3".

[0074] In this embodiment, the maximum correction value CVM, which is the maximum value of the correction value CV, is, for example, "1.0". When the correction value CV is "1.3" which is larger than the maximum correction value CVM, as shown in the graph G25 of FIG. 7, when the luminance value Yin of the pixel constituting the input image PI is "700" or more, the luminance value Yout of the pixel constituting the projection image PM is saturated at "1024". Therefore, when the correction value CV is "1.3", the pixels constituting the input image PI, which have a luminance value Yin of "700" or more, all have a luminance value Yout of "1024" in the projection image PM, and therefore a part of the projection image PM does not correspond to the input image PI. Therefore, "1.3" cannot be used as the correction value CV.

[0075] 7, the projector 100 corrects the luminance value Yout of the pixel corresponding to the luminance value Yin so as to increase as the correction value CV increases. Therefore, by increasing the correction value CV, the projector 100 can display on the floor surface FL a projection image PM that is less susceptible to the influence of the illumination light from the illumination device 200.

[0076] Next, referring to FIG. 8, the relationship between the lighting influence degree DT and the contrast correction value CV is FIG. 8 shows the relationship between the lighting influence degree DT and the correction value CV of the contrast correction. 8 is a graph showing an example. The horizontal axis of FIG. 8 indicates the lighting influence degree DT. vertical The axis is the correction value CV is shown. As shown in the graph G3 of FIG. 8, in this embodiment, the correction value CV is, for example, a value obtained by multiplying the illumination effect degree Proportional to DT. Maximum correction value CVM corresponds to maximum impact DTA. Maximum correction value CVM is the maximum value of the contrast correction value CV. The maximum correction value CVM is, for example, "1 .0". The maximum influence level DTA is the maximum value of the lighting influence level DT.

[0077] As described with reference to FIG. 6, when the correction value CV determined by the determination unit 414 based on the first position information JP1, the second position information JP2, the predetermined position information JPC, the first maximum light amount MC1, the second maximum light amount MC2, and the dimming level VL is greater than the maximum correction value CVM, the determination unit 414 executes the following processing. That is, the determination unit 414 reduces the illumination influence degree DT so that the correction value CV matches the maximum correction value CVM. Specifically, the determination unit 414 adjusts the first light amount CA and the second light amount CE so that the correction value CV matches the maximum correction value CVM. The first light amount CA is the amount of light output by each of the four lighting devices 200 constituting the first group GR1. The second light amount CE is the amount of light output by each of the eight lighting devices 200 constituting the second group GR2.

[0078] As described above, the determination unit 414 determines the correction value CV so that the correction value CV is equal to or smaller than the maximum correction value CVM. In order to determine the correction value CV, the determination unit 414 determines a correction value CV that is greater than the maximum correction value CVM. Therefore, as shown in graph G31, a correction value CV that is larger than the maximum correction value CVM is set. The corresponding graph G3 is shown by a dashed line.

[0079] Next, the relationship between the dimming level VL and the lighting influence degree DT will be described with reference to Fig. 9. Fig. 9 is a graph showing an example of the relationship between the dimming level VL and the lighting influence degree DT. The horizontal axis of Fig. 9 represents the dimming level VL, and the vertical axis of Fig. 9 represents the lighting influence degree DT. Graph G41 shows the relationship between the first group influence degree DG1 and the dimming level VL. Graph G42 shows the relationship between the second group influence degree DG2 and the dimming level VL. Graph G43 shows the relationship between the lighting influence degree DT and the dimming level VL.

[0080] The first group influence degree DG1 indicates the degree of influence that the light emitted from the four lighting devices 200 constituting the first group GR1 has on the visibility of the projected image PM projected at the predetermined position PC. The second group influence degree DG2 indicates the degree of influence that the light emitted from the eight lighting devices 200 constituting the second group GR2 has on the visibility of the projected image PM projected at the predetermined position PC. The lighting influence degree DT indicates the degree of influence that the light emitted from the lighting device 200 has on the visibility of the projected image PM projected at the predetermined position PC. As described using equation (9) with reference to FIG. 6, the lighting influence degree DT is the sum of the first group influence degree DG1 and the second group influence degree DG2.

[0081] When the dimming level VL is equal to or lower than the specific dimming level VLA, the first group influence DG1 is proportional to the dimming level VL, as shown in graph G41. Also, when the dimming level VL is equal to or lower than the specific dimming level VLA, the second group influence DG2 is proportional to the dimming level VL, as shown in graph G42. As a result, when the dimming level VL is equal to or lower than the specific dimming level VLA, the lighting influence DT is proportional to the dimming level VL, as shown in graph G43. In other words, as described with reference to FIG. 6, when the calculation unit 413 calculates the first influence degree DA and the second influence degree DE, and calculates the lighting influence degree DT based on the first influence degree DA and the second influence degree DE, the lighting influence degree DT is proportional to the dimming level VL. The specific dimming level VLA corresponds to the maximum impact degree DTA, that is, when the dimming level VL is the specific dimming level VLA, the lighting impact degree DT coincides with the maximum impact degree DTA.

[0082] 6, when the lighting influence DT calculated by the calculation unit 413 is greater than the maximum influence DTA, the determination unit 414 reduces the first influence DA and the second influence DE so that the lighting influence DT becomes the maximum influence DTA. In other words, when the lighting influence DT calculated by the calculation unit 413 is greater than the maximum influence DTA, the determination unit 414 reduces the first group influence DG1 and the second group influence DG2 so that the lighting influence DT becomes the maximum influence DTA.

[0083] For example, when the dimming level VL is a dimming level VLB that is greater than the specific dimming level VLA, the lighting influence degree DT calculated by the calculation unit 413 becomes a lighting influence degree DTB that is greater than the maximum influence degree DTA. In this case, the determination unit 414 reduces the first group influence DG1 by the first adjustment amount ΔDT1, as shown in graph G41. In other words, the determination unit 414 reduces the first light amount CA of the lighting device 200 included in the first group GR1 so as to reduce the first group influence DG1 by the first adjustment amount ΔDT1. Furthermore, as shown in graph G42, the determination unit 414 reduces the second group influence DG2 by the second adjustment amount ΔDT2. In other words, the determination unit 414 reduces the second light amount CE of the lighting devices 200 included in the second group GR2 so as to reduce the second group influence DG2 by the second adjustment amount ΔDT2. As a result, as shown in graph G43, when the dimming level VL is the dimming level VLB, the determination unit 414 can reduce the lighting influence degree DT by the total adjustment amount ΔDTA to match the maximum influence degree DTA.

[0084] Next, the process of the second control unit 410 of the control device 400 will be described with reference to Fig. 10. Fig. 10 is a flow chart showing an example of the process of the second control unit 410 of the control device 400. 10, first, in step S101, the acquisition unit 411 acquires position information JP. The position information JP includes first position information JP1, second position information JP2, and specific position information JPP. The first position information JP1 indicates a first position P1 where the first lighting device 200A is disposed. The second position information JP2 indicates a second position P2 where the second lighting device 200E is disposed. The specific position information JPP indicates a specific position PP where the projector 100 is disposed. Next, in step S103, the receiving unit 412 receives a maximum light amount MC. The maximum light amount MC includes a first maximum light amount MC1 and a second maximum light amount MC2. The first maximum light amount MC1 indicates the maximum value of the light amount of the first illumination device 200A. The second maximum light amount MC2 indicates the maximum value of the light amount of the second illumination device 200E.

[0085] Next, in step S105, the receiving unit 412 receives the dimming level VL from the dimming device 300. Next, in step S107, the calculation unit 413 calculates the distance L and the angle of incidence θ. The distance L includes a first distance LA and a second distance LE. The angle of incidence θ includes a first angle of incidence θA and a second angle of incidence θE. The first distance LA is the distance between the first position P1 and the predetermined position PC. The second distance LE is the distance between the second position P2 and the predetermined position PC. The first angle of incidence θA is the angle at which the light irradiated from the first lighting device 200A is incident on the predetermined position PC. The second angle of incidence θE is the angle at which the light irradiated from the second lighting device 200E is incident on the predetermined position PC. Next, in step S109, the calculation unit 413 calculates a first light amount CA and a second light amount CE. The first light amount CA is the light amount of the first illumination device 200A. The second light amount CE is the light amount of the second illumination device 200E.

[0086] Next, in step S111, the calculation unit 413 calculates a first influence degree DA and a second influence degree DE. The first influence degree DA indicates the degree of influence that the light irradiated from the first illumination device 200A has on the visibility of the projection image PM projected at the predetermined position PC. The second influence degree DE indicates the degree of influence that the light irradiated from the second illumination device 200E has on the visibility of the projection image PM projected at the predetermined position PC. Next, in step S113, the calculation unit 413 calculates the illumination influence degree DT. The illumination influence degree DT indicates the degree of influence that the light emitted from the illumination device 200 has on the visibility of the projection image PM projected at the predetermined position PC. The illumination devices 200 are, for example, configured with four illumination devices 200 constituting a first group GR1 and eight illumination devices 200 constituting a second group GR2. The first illumination device 200A and the third illumination device 200B are included in the first group GR1. The second illumination device 200E and the fourth illumination device 200F are included in the second group GR2.

[0087] Next, in step S115, the determination unit 414 determines whether or not the illumination influence degree DT is equal to or less than the maximum influence degree DTA which is the upper limit value of the illumination influence degree DT. If the determination unit 414 determines that the lighting influence DT is equal to or less than the maximum influence DTA (step S115; YES), the process proceeds to step S121. If the determination unit 414 determines that the lighting influence DT is greater than the maximum influence DTA (step S115; NO), the process proceeds to step S117. Then, in step S117, the determination unit 414 reduces the first amount of light CA and the second amount of light CE so that the illumination influence degree DT coincides with the maximum influence degree DTA. Next, in step S119, the determination unit 414 determines the correction value CV to be the maximum correction value CVM, which is the upper limit of the correction value CV. After that, the process proceeds to step S123.

[0088] In the case of YES in step S115, in step S121, the determination unit 414 determines the correction value CV based on the illumination influence degree DT. The correction value CV indicates the degree of contrast correction of the projector 100. Next, in step S123, the determination unit 414 transmits the correction value CV to the projector 100, and causes the projector 100 to execute contrast correction corresponding to the correction value CV. After that, the process ends.

[0089] [Present embodiment and effects] As described above with reference to FIGS. 1 to 10, the display system 1 according to this embodiment includes the first lighting device 200A arranged at the first position P1 on the ceiling CL, the second lighting device 200E arranged at the second position P2 different from the first position P1 on the ceiling CL, the projector 100 arranged at a specific position PP different from the first position P1 and the second position P2 on the ceiling CL, and projecting a projection image PM onto a predetermined position PC on a floor surface FL into which at least a portion of light from the first lighting device 200A is incident, and the control device 400 controlling the first lighting device 200A, the second lighting device 200E, and the projector 100. The control device 400 controls the first position information JP1 indicating the first position P1. The projector 100 executes the following operations: acquiring second position information JP2 indicating the second position P2 and predetermined position information JPC indicating the predetermined position PC; accepting a first maximum light intensity MC1 indicating the maximum light intensity of the first lighting device 200A and a second maximum light intensity MC2 indicating the maximum light intensity of the second lighting device 200E; accepting a dimming level VL for adjusting the light intensity of the first lighting device 200A and the light intensity of the second lighting device 200E; and determining a correction value CV indicating the degree of contrast correction of the projector 100 based on the first position information JP1, the second position information JP2, the predetermined position information JPC, the first maximum light intensity MC1, the second maximum light intensity MC2, and the dimming level VL.

[0090] That is, a correction value CV indicating the degree of contrast correction of the projector 100 is determined based on the first position information JP1, the second position information JP2, the predetermined position information JPC, the first maximum light amount MC1, the second maximum light amount MC2, and the dimming level VL. Therefore, an appropriate correction value CV can be determined. Therefore, the visibility of the projection image PM of the projector 100 can be improved while ensuring the brightness of the first illumination device 200A and the second illumination device 200E.

[0091] In the above display system 1, the control device 400 calculates, based on the first position information JP1 and the predetermined position information JPC, a first distance LA that is the distance between the first position P1 and the predetermined position PC, and a first incidence angle θA that is the angle at which light irradiated from the first illumination device 200A is incident on the predetermined position PC; based on the second position information JP2 and the predetermined position information JPC, a second distance LE that is the distance between the second position P2 and the predetermined position PC, and a second incidence angle θE that is the angle at which light irradiated from the second illumination device 200E is incident on the predetermined position PC; based on the first maximum light amount MC1 and the dimming level VL, calculates a first light amount CA that is the light amount of the first illumination device 200A; and the dimming level VL, calculating a second light intensity CE, which is the light intensity of the second lighting device 200E; calculating a first influence degree DA indicating the degree of influence that the light irradiated from the first lighting device 200A has on the visibility of the projection image PM projected at the predetermined position PC, based on the first distance LA, the first incident angle θA, and the first light intensity CA; and calculating a second influence degree DE indicating the degree of influence that the light irradiated from the second lighting device 200E has on the visibility of the projection image PM projected at the predetermined position PC, based on the second distance LE, the second incident angle θE, and the second light intensity CE, and determining the correction value CV includes determining the correction value CV based on the first influence degree DA and the second influence degree DE. Therefore, since the correction value CV is determined based on the first influence degree DA and the second influence degree DE, an appropriate correction value CV can be determined. Therefore, the visibility of the projection image PM of the projector 100 can be improved while ensuring the brightness of the first illumination device 200A and the second illumination device 200E.

[0092] Furthermore, in the above-described display system 1, determining the correction value CV includes calculating an illumination influence degree DT indicating the degree of influence that the light irradiated from the first illumination device 200A and the light irradiated from the second illumination device 200E have on the visibility of the projection image PM projected at the predetermined position PC based on the first influence degree DA and the second influence degree DE, and determining the correction value CV based on the illumination influence degree DT. Therefore, since the correction value CV is determined based on the illumination influence degree DT, an appropriate correction value CV can be determined. Therefore, the visibility of the projection image PM of the projector 100 can be improved while ensuring the brightness of the first illumination device 200A and the second illumination device 200E.

[0093] Furthermore, in the above display system 1, the lighting influence level DT has a maximum influence level DTA as an upper limit value, and when the lighting influence level DT is greater than the maximum influence level DTA, the control device 400 further executes the following: reducing at least one of the first light amount CA and the second light amount CE so that the lighting influence level DT is equal to or less than the maximum influence level DTA. Therefore, in order to make the illumination influence level DT equal to or lower than the maximum influence level DTA, at least one of the first light amount CA and the second light amount CE is reduced, so that the brightness of the first illumination device 200A and the second illumination device 200E can be appropriately controlled. Therefore, the visibility of the projection image PM of the projector 100 can be improved while ensuring the brightness of the first illumination device 200A and the second illumination device 200E.

[0094] Furthermore, in the above display system 1, when the second distance LE is greater than the first distance LA and the second incident angle θE is smaller than the first incident angle θA, the control device 400 reduces at least the first light amount CA to make the lighting influence DT less than or equal to the maximum influence DTA. That is, when the second distance LE is greater than the first distance LA and the second angle of incidence θE is smaller than the first angle of incidence θA, the first influence DA is greater than the second influence DE. Therefore, by reducing at least the first light amount CA, the illumination influence DT is set to be equal to or less than the maximum influence DTA, so that the brightness of the first illumination device 200A and the second illumination device 200E can be appropriately controlled. Therefore, the visibility of the projection image PM of the projector 100 can be improved while ensuring the brightness of the first illumination device 200A and the second illumination device 200E.

[0095] Moreover, the above-mentioned display system 1 includes a third lighting device 200B arranged at a third position P3 different from the first position P1 and the second position P2, and the control device 400 further executes the following: when a third distance LB, which is a distance between the third position P3 and a predetermined position PC, approximately matches the first distance LA, a third incidence angle θB, which is an angle at which light irradiated from the third lighting device 200B is incident on the predetermined position PC, approximately matches the first incidence angle θA, and a third maximum light amount MC3 indicating the maximum value of the light amount of the third lighting device 200B approximately matches the first maximum light amount MC1, the control device 400 sets the first lighting device 200A and the third lighting device 200B as a first group GR1, and controls the third light amount CB, which is the light amount of the third lighting device 200B, to match the first light amount CA. That is, when the first illumination device 200A and the third illumination device 200B are included in the first group GR1, the third light amount CB is controlled to be equal to the first light amount CA. Therefore, the brightness of the third illumination device 200B can be easily and appropriately controlled.

[0096] Furthermore, in the above-mentioned display system 1, a fourth illumination device 200F is disposed at a fourth position P4 different from the first position P1, the second position P2, and the third position P3, and the control device 400 further executes the following: when a fourth distance LF, which is a distance between the fourth position P4 and a predetermined position PC, approximately matches the second distance LE, a fourth incidence angle θF, which is an angle at which light irradiated from the fourth illumination device 200F is incident on the predetermined position PC, approximately matches the second incidence angle θE, and a fourth maximum light amount MC4 indicating the maximum value of the light amount of the fourth illumination device 200F approximately matches the second maximum light amount MC2, the control device 400 sets the second illumination device 200E and the fourth illumination device 200F as a second group GR2 different from the first group GR1, and controls the fourth light amount CF, which is the light amount of the fourth illumination device 200F, to match the second light amount CE. That is, when the second illumination device 200E and the fourth illumination device 200F are included in the second group GR2, the fourth light amount CF is controlled to be equal to the second light amount CE. Therefore, the brightness of the fourth illumination device 200F can be easily and appropriately controlled.

[0097] Moreover, in the above-described display system 1, the control device 400 further executes the following: accepting a first priority PR1, which is a priority for the first group GR1, and a second priority PR2, which is a priority for the second group GR2; and, when the second priority PR2 is higher than the first priority PR1, making the light intensity of the lighting device 200 included in the second group GR2 greater than the light intensity of the lighting device 200 included in the first group GR1. That is, when the second priority PR2 is higher than the first priority PR1, the light intensity of the lighting devices 200 included in the second group GR2 is made greater than the light intensity of the lighting devices 200 included in the first group GR1. Therefore, by appropriately setting the first priority PR1 and the second priority PR2, the light intensity of the lighting devices 200 included in the first group GR1 and the light intensity of the lighting devices 200 included in the second group GR2 can be appropriately controlled.

[0098] The second control program PG2 according to the present embodiment is a second control program PG2 that controls a first lighting device 200A arranged at a first position P1 on the ceiling CL, a second lighting device 200E arranged at a second position P2 different from the first position P1 on the ceiling CL, and a projector 100 that is arranged at a specific position PP different from the first position P1 and the second position P2 on the ceiling CL and projects a projection image PM onto a predetermined position PC on a floor surface FL into which at least a part of the light from the first lighting device 200A is incident. The second control program PG2 controls first position information JP1 indicating the first position P1, second position information JP2 indicating the second position P2, and the predetermined position information PC indicating the predetermined position PC. The second processor 410A executes the following operations: acquiring information JPC; accepting a first maximum light amount MC1 indicating the maximum light amount of the first lighting device 200A and a second maximum light amount MC2 indicating the maximum light amount of the second lighting device 200E; accepting a dimming level VL for adjusting the light amount of the first lighting device 200A and the light amount of the second lighting device 200E; and determining a correction value CV indicating the degree of contrast correction of the projector 100 based on the first position information JP1, the second position information JP2, the specified position information JPC, the first maximum light amount MC1, the second maximum light amount MC2, and the dimming level VL. Therefore, the second control program PG2 according to the present embodiment can achieve the same effects as the display system 1 according to the present embodiment.

[0099] The control device 400 according to the present embodiment controls a first lighting device 200A arranged at a first position P1 on the ceiling CL, a second lighting device 200E arranged at a second position P2 different from the first position P1 on the ceiling CL, and a projector 100 arranged at a specific position PP different from the first position P1 and the second position P2 on the ceiling CL, which projects a projection image PM onto a predetermined position PC on a floor surface FL into which at least a portion of the light from the first lighting device 200A is incident. The control device 400 includes a second processor 410A, and the second processor 410A controls a first position information JP1 indicating the first position P1 and a second position information J indicating the second position P2. The projector 100 executes the following steps: acquiring position information P2 and predetermined position information JPC indicating the predetermined position PC; accepting a first maximum light amount MC1 indicating the maximum light amount of the first lighting device 200A and a second maximum light amount MC2 indicating the maximum light amount of the second lighting device 200E; accepting a dimming level VL for adjusting the light amount of the first lighting device 200A and the light amount of the second lighting device 200E; and determining a correction value CV indicating the degree of contrast correction of the projector 100 based on the first position information JP1, the second position information JP2, the predetermined position information JPC, the first maximum light amount MC1, the second maximum light amount MC2, and the dimming level VL. Therefore, the control device 400 according to the present embodiment can achieve the same effects as the display system 1 according to the present embodiment.

[0100] [Other embodiments] The above-described embodiment is a preferred embodiment, however, the present invention is not limited to the above-described embodiment and various modifications are possible without departing from the scope of the present invention.

[0101] In the present embodiment, the control device 400 is configured as a personal computer, but is not limited thereto. The control device 400 may be configured as, for example, a tablet terminal or a smartphone. The control device 400 may also be, for example, a server device.

[0102] In this embodiment, a case will be described in which the projector 100 projects the projection image PM onto a floor surface FL, but the present invention is not limited to this. The projector 100 may project the projection image PM onto, for example, a wall surface.

[0103] In the present embodiment, the projector 100 performs contrast correction by correcting the luminance of the projection image PM, but the present invention is not limited to this. For example, the projector 100 may perform contrast correction by performing edge enhancement processing on the projection image PM.

[0104] In the present embodiment, the first group GR1 is described as being composed of four lighting devices 200, but is not limited thereto. The first group GR1 may be composed of two or more lighting devices 200. For example, the first group GR1 may be composed of two or three lighting devices 200. Furthermore, for example, the first group GR1 may be composed of five or more lighting devices 200.

[0105] In the present embodiment, the second group GR2 is configured with eight lighting devices 200, but the present invention is not limited to this. The second group GR2 may be configured with two or more lighting devices 200. For example, the second group GR2 may be configured with any number of lighting devices 200, from two to seven. Furthermore, for example, the second group GR1 may be configured with nine or more lighting devices 200.

[0106] In this embodiment, a case will be described in which the lighting devices 200 are configured with the lighting devices 200 included in the first group GR1 and the lighting devices 200 included in the second group GR2, but this is not limiting. The lighting devices 200 may include, for example, the lighting devices 200 included in the third group. The lighting devices 200 may include, for example, the lighting devices 200 included in the third group and the lighting devices 200 included in the fourth group.

[0107] Moreover, each functional unit shown in FIG. 6 indicates a functional configuration, and the specific implementation form is not particularly limited. In other words, it is not necessarily necessary to implement hardware corresponding to each functional unit individually, and it is also possible to implement a configuration in which one processor executes a program to realize the functions of multiple functional units. Also, some of the functions realized by software in the above embodiment may be realized by hardware, or some of the functions realized by hardware may be realized by software. In addition, the specific detailed configuration of each unit of the control device 400 can be arbitrarily changed within the scope of the gist.

[0108] In addition, the processing units in the flowchart shown in Fig. 10 are divided according to the main processing contents in order to facilitate understanding of the processing of the second control unit 410 of the control device 400. There is no limitation to the manner of division or names of the processing units shown in the flowchart of Fig. 10, and the processing units can be divided into more processing units according to the processing contents, or one processing unit can be divided to include more processes. In addition, the processing order of the above flowchart is not limited to the example shown in the figure.

[0109] Moreover, the display system 1 can be realized by causing the second processor 410A included in the control device 400 to execute a second control program PG2 corresponding to the display system 1. Moreover, the second control program PG2 can also be recorded in a computer-readable recording medium. The recording medium may be a magnetic or optical recording medium or a semiconductor memory device. Specific examples of the recording medium include portable or fixed recording media such as a flexible disk, HDD, CD-ROM (Compact Disk Read Only Memory), DVD, Blu-ray (registered trademark) Disc, magneto-optical disk, flash memory, and card-type recording medium. The recording medium may also be a non-volatile storage device such as a RAM, ROM, or HDD, which is an internal storage device provided in the control device 400. The display system 1 can also be realized by storing the second control program PG2 in a server device or the like and downloading the second control program PG2 from the server device to the control device 400.

[0110] [Note] The following is a summary of this disclosure. (Supplementary Note 1) A display system including a first lighting device arranged at a first position on a ceiling, a second lighting device arranged at a second position on the ceiling different from the first position, a projector arranged at a specific position on the ceiling different from the first position and the second position, the projector projecting an image onto a predetermined position on a floor surface or a wall surface into which at least a portion of light from the first lighting device is incident, and a control device controlling the first lighting device, the second lighting device, and the projector, wherein the control device executes the following: acquiring first position information indicating the first position, second position information indicating the second position, and predetermined position information indicating the predetermined position; accepting a first maximum light amount indicating a maximum value of the light amount of the first lighting device and a second maximum light amount indicating a maximum value of the light amount of the second lighting device; accepting a dimming level for adjusting the light amount of the first lighting device and the light amount of the second lighting device; and determining a correction value indicating a degree of contrast correction of the projector based on the first position information, the second position information, the predetermined position information, the first maximum light amount, the second maximum light amount, and the dimming level.

[0111] Thereby, a correction value indicating the degree of contrast correction of the projector is determined based on the first position information, the second position information, the predetermined position information, the first maximum light amount, the second maximum light amount, and the dimming level. Therefore, an appropriate correction value can be determined, and the visibility of the projector can be improved while ensuring the brightness of the first illumination device and the second illumination device.

[0112] (Supplementary Note 2) The control device calculates, based on the first position information and the predetermined position information, a first distance that is a distance between the first position and the predetermined position and a first angle of incidence that is an angle at which light irradiated from the first lighting device is incident on the predetermined position; calculates, based on the second position information and the predetermined position information, a second distance that is a distance between the second position and the predetermined position and a second angle of incidence that is an angle at which light irradiated from the second lighting device is incident on the predetermined position; calculates a first light amount that is a light amount of the first lighting device based on the first maximum light amount and the dimming level; and calculates a second light amount that is a light amount of the first lighting device based on the second maximum light amount and the dimming level. 2. The display system of claim 1, further comprising: calculating a second light amount, which is the light amount of the second lighting device; calculating a first influence degree indicating a degree of influence that the light irradiated from the first lighting device has on the visibility of the image projected at the predetermined position, based on the first distance, the first incident angle, and the first light amount; and calculating a second influence degree indicating a degree of influence that the light irradiated from the second lighting device has on the visibility of the image projected at the predetermined position, based on the second distance, the second incident angle, and the second light amount, and determining the correction value includes determining the correction value based on the first influence degree and the second influence degree.

[0113] In this way, since the correction value is determined based on the first influence degree and the second influence degree, an appropriate correction value can be determined, and therefore the visibility of the projector can be improved while ensuring the brightness of the first lighting device and the second lighting device.

[0114] (Appendix 3) The display system described in Appendix 2, wherein determining the correction value includes calculating an illumination influence degree indicating the degree of influence that the light irradiated from the first lighting device and the light irradiated from the second lighting device have on the visibility of the image projected at the specified position based on the first influence degree and the second influence degree, and determining the correction value based on the illumination influence degree.

[0115] In this way, since the correction value is determined based on the degree of influence of illumination, an appropriate correction value can be determined, and therefore the visibility of the projector can be improved while ensuring the brightness of the first illumination device and the second illumination device.

[0116] (Appendix 4) The display system described in any one of Appendices 1 to 3, wherein the lighting influence degree has an upper limit value, and when the lighting influence degree is greater than the upper limit value, the control device further performs the following: reducing at least one of the first light amount and the second light amount so that the lighting influence degree is equal to or less than the upper limit value.

[0117] This allows the brightness of the first lighting device and the second lighting device to be appropriately controlled by reducing at least one of the first light amount and the second light amount so that the illumination influence level is equal to or lower than the maximum influence level, thereby improving the visibility of the projector while ensuring the brightness of the first lighting device and the second lighting device.

[0118] (Appendix 5) A display system described in any one of Appendices 1 to 4, wherein when the second distance is greater than the first distance and the second incidence angle is smaller than the first incidence angle, the control device reduces the lighting influence degree to below the upper limit value by at least reducing the first light amount.

[0119] As a result, when the second distance is greater than the first distance and the second incidence angle is smaller than the first incidence angle, the first influence is greater than the second influence. Therefore, by reducing at least the first light amount, the illumination influence is set to be equal to or less than the maximum influence, and the brightness of the first illumination device and the second illumination device can be appropriately controlled. Therefore, the visibility of the projector can be improved while ensuring the brightness of the first illumination device and the second illumination device.

[0120] (Supplementary Note 6) The display system according to any one of Supplementary Note 1 to Supplementary Note 5, further comprising a third lighting device arranged at a third position different from the first position and the second position, wherein the control device further executes the following: when a third distance, which is a distance between the third position and the predetermined position, approximately matches the first distance, a third incident angle, which is an angle at which light irradiated from the third lighting device is incident on the predetermined position, approximately matches the first incident angle, and a third maximum light amount, which indicates a maximum value of the light amount of the third lighting device, approximately matches the first maximum light amount, sets the first lighting device and the third lighting device as a first group, and controls the third light amount, which is the light amount of the third lighting device, to match the first light amount.

[0121] Thereby, when the first illumination device and the third illumination device are included in the first group, the third light amount is controlled to be equal to the first light amount, and therefore the brightness of the third illumination device can be easily and appropriately controlled.

[0122] (Supplementary Note 7) The display system according to Supplementary Note 6, further comprising a fourth lighting device arranged at a fourth position different from the first position, the second position, and the third position, wherein the control device further executes, when a fourth distance which is a distance between the fourth position and the predetermined position approximately matches the second distance, a fourth incident angle which is an angle at which light irradiated from the fourth lighting device is incident on the predetermined position approximately matches the second incident angle, and a fourth maximum light amount indicating a maximum value of the light amount of the fourth lighting device approximately matches the second maximum light amount, setting the second lighting device and the fourth lighting device as a second group different from the first group, and controlling the fourth light amount which is the light amount of the fourth lighting device to match the second light amount.

[0123] Thereby, when the second illumination device and the fourth illumination device are included in the second group, the fourth light amount is controlled to be equal to the second light amount, and therefore the brightness of the fourth illumination device can be easily and appropriately controlled.

[0124] (Appendix 8) The display system described in Appendix 7, wherein the control device further performs the steps of accepting a priority for the first group and a priority for the second group, and, when the priority for the second group is higher than the priority for the first group, making the light output of the lighting devices included in the second group greater than the light output of the lighting devices included in the first group.

[0125] As a result, when the second priority is higher than the first priority, the light amount of the lighting devices included in the second group is made greater than the light amount of the lighting devices included in the first group. Therefore, by appropriately setting the first priority and the second priority, the light amount of the lighting devices included in the first group and the light amount of the lighting devices included in the second group can be appropriately controlled.

[0126] (Supplementary Note 9) A program for controlling a first lighting device arranged at a first position on a ceiling, a second lighting device arranged at a second position on the ceiling different from the first position, and a projector arranged at specific positions on the ceiling different from the first position and the second position, and projecting an image onto a predetermined position on a floor surface or a wall surface into which at least a portion of light from the first lighting device is incident, the program causing a processor to execute the following steps: acquiring first position information indicating the first position, second position information indicating the second position, and predetermined position information indicating the predetermined position; accepting a first maximum light amount indicating a maximum value of the light amount of the first lighting device and a second maximum light amount indicating a maximum value of the light amount of the second lighting device; accepting a dimming level for adjusting the light amount of the first lighting device and the light amount of the second lighting device; and determining a correction value indicating a degree of contrast correction of the projector based on the first position information, the second position information, the predetermined position information, the first maximum light amount, the second maximum light amount, and the dimming level.

[0127] As a result, the program described in Supplementary Note 9 has the same effect as the display system described in Supplementary Note 1.

[0128] (Supplementary Note 10) A control device for controlling a first lighting device arranged at a first position on a ceiling, a second lighting device arranged at a second position on the ceiling different from the first position, and a projector arranged at a specific position on the ceiling different from the first position and the second position, and projecting an image onto a predetermined position on a floor surface or a wall surface into which at least a portion of light from the first lighting device is incident, the control device including at least one processor, the at least one processor executing the following operations: acquiring first position information indicating the first position, second position information indicating the second position, and predetermined position information indicating the predetermined position; accepting a first maximum light amount indicating a maximum value of the light amount of the first lighting device and a second maximum light amount indicating a maximum value of the light amount of the second lighting device; accepting a dimming level for adjusting the light amount of the first lighting device and the light amount of the second lighting device; and determining a correction value indicating a degree of contrast correction of the projector based on the first position information, the second position information, the predetermined position information, the first maximum light amount, the second maximum light amount, and the dimming level.

[0129] As a result, the control device described in Supplementary note 10 achieves the same effects as the display system described in Supplementary note 1. [Explanation of symbols]

[0130] 1...display system, 100...projector, 110...projection unit, 111...light source unit, 141...first communication interface, 200, 200A-200L...illumination device, 200A...first illumination device, 200B...third illumination device, 200E...second illumination device, 200F...fourth illumination device, 300...dimming device, 400...control device, 410...second control unit, 410A...second processor (processor), 410B...second Memory, 411...acquisition unit, 412...reception unit, 413...calculation unit, 414...determination unit, 415...second communication control unit, 416...second information storage unit, 420...second operation mechanism, 430...second display mechanism, 440...second communication interface, CA...first light amount, CB...third light amount, CE...second light amount, CF...fourth light amount, CL...ceiling, CV...correction value, CVM...maximum correction value, DA...first influence level, DE...second influence level, DG1...first Group influence, DG2...2nd group influence, DT...lighting influence, DTA...maximum influence, FL...floor surface, GR1...1st group, GR2...2nd group, JP1...1st position information, JP2...2nd position information, JP3...3rd position information, JP4...4th position information, JPC...predetermined position information, JPP...specific position information, LA...1st distance, LB...3rd distance, LE...2nd distance, LF...4th distance, MC1...1st maximum light intensity, MC2...second maximum light intensity, MC3...third maximum light intensity, MC4...fourth maximum light intensity, P1...first position, P2...second position, P3...third position, P4...fourth position, PC...predetermined position, PG2...second control program (program), PM...projected image (image), PP...specific position, PR1...first priority, PR2...second priority, VL...dimming level, θA...first angle of incidence, θB...third angle of incidence, θE...second angle of incidence, θF...fourth angle of incidence.

Claims

1. A first lighting device disposed at a first position on the ceiling; a second lighting device disposed at a second position on the ceiling different from the first position; At least one of the first and second positions is disposed on the ceiling. An image is projected onto a predetermined position on a floor or wall surface onto which a portion of the light from the first lighting device is incident. A projector and a control device that controls the first lighting device, the second lighting device, and the projector; , including The control device includes: First position information indicating the first position, second position information indicating the second position, and acquiring predetermined location information indicating a location of the A first maximum light amount indicating a maximum value of the light amount of the first lighting device and a second maximum light amount indicating a maximum value of the light amount of the second lighting device a second maximum light amount indicating a large value; and A dimming level for adjusting the light amount of the first lighting device and the light amount of the second lighting device is received. And the first position information, the second position information, the predetermined position information, the first maximum light amount, 2. Based on the maximum light amount and the dimming level, the contrast correction of the projector is determining a correction value indicative of the degree of A display system that performs

2. The control device includes: Based on the first position information and the predetermined position information, and the distance at which the light emitted from the first lighting device is incident on the predetermined position. a first angle of incidence, Based on the second position information and the predetermined position information, and the light emitted from the second lighting device is incident on the predetermined position. a second angle of incidence, A first maximum light amount, which is a light amount of the first lighting device, is calculated based on the first maximum light amount and the dimming level. Calculating the amount of light; A second maximum light amount, which is the light amount of the second lighting device, is determined based on the second maximum light amount and the dimming level. Calculating the amount of light; from the first lighting device based on the first distance, the first incident angle, and the first light amount. Indicates the degree of effect that the irradiated light has on the visibility of the image projected at the specified position. Calculating a first influence degree; from the second lighting device based on the second distance, the second incident angle, and the second light amount. Indicates the degree of effect that the irradiated light has on the visibility of the image projected at the specified position. Calculating a second influence degree; Further execute Determining the correction value comprises: determining the correction value based on the first degree of influence and the second degree of influence; Including, The display system of claim 1 .

3. Determining the correction value comprises: Based on the first influence degree and the second influence degree, and the light emitted from the second lighting device is projected onto the predetermined position. Calculating a lighting influence degree indicating a degree of influence on ease of use; determining the correction value based on the illumination influence degree. The display system of claim 2 .

4. The lighting influence degree has an upper limit value, The control device includes: When the degree of influence of lighting is greater than the upper limit, the degree of influence of lighting is set to be equal to or less than the upper limit. reducing at least one of the first amount of light and the second amount of light so that Further execute The display system of claim 3.

5. The second distance is greater than the first distance, and the second angle of incidence is greater than the first angle of incidence. In the case of small The control device includes: By reducing at least the first light amount, the illumination influence degree is set to the upper limit value or less. do, 5. The display system of claim 4.

6. a third lighting device disposed at a third position different from the first position and the second position; The control device includes: A third distance between the third position and the predetermined position is approximately equal to the first distance, a third incidence angle, which is an angle at which light irradiated from the third illumination device is incident on the predetermined position, A third maximum light amount indicating a maximum value of the light amount of the third lighting device is approximately equal to the first incident angle. When the amount of light substantially coincides with the first maximum amount of light, The first lighting device and the third lighting device are set as a first group; A third light amount, which is a light amount of the third lighting device, is controlled so as to be equal to the first light amount. and, The display system according to claim 2 , further comprising:

7. A fourth illuminator disposed at a fourth position different from the first position, the second position, and the third position. Equipped with a lighting device, The control device includes: A fourth distance between the fourth position and the predetermined position is approximately equal to the second distance, a fourth incidence angle, which is an angle at which light emitted from the fourth illumination device is incident on the predetermined position, A fourth maximum light amount indicating a maximum value of the light amount of the fourth lighting device is approximately equal to the second incident angle. When the amount of light substantially coincides with the second maximum amount of light, The second lighting device and the fourth lighting device are grouped into a second group different from the first group. and set it, A fourth light amount, which is a light amount of the fourth lighting device, is controlled so as to be equal to the second light amount. and, The display system of claim 6 further comprising:

8. A first lighting device is arranged at a first position on the ceiling, and a second lighting device is arranged at a second position different from the first position on the ceiling. a second lighting device disposed at a position different from the first position and the second position of the ceiling; A floor surface or a wall that is arranged at a fixed position and onto which at least a part of the light from the first lighting device is incident a projector that projects an image onto a predetermined position on a surface; and a program that controls the projector, First position information indicating the first position, second position information indicating the second position, and acquiring predetermined location information indicating a location of the A first maximum light amount indicating a maximum value of the light amount of the first lighting device and a second maximum light amount indicating a maximum value of the light amount of the second lighting device a second maximum light amount indicating a large value; and A dimming level for adjusting the light amount of the first lighting device and the light amount of the second lighting device is received. And the first position information, the second position information, the predetermined position information, the first maximum light amount, 2. Based on the maximum light amount and the dimming level, the contrast correction of the projector is determining a correction value indicative of the degree of A program that causes a processor to execute the following:

9. A first lighting device is arranged at a first position on the ceiling, and a second lighting device is arranged at a second position different from the first position on the ceiling. a second lighting device disposed at a position different from the first position and the second position of the ceiling; A floor surface or a wall that is arranged at a fixed position and onto which at least a part of the light from the first lighting device is incident a control device for controlling a projector that projects an image at a predetermined position on a surface, at least one processor; The at least one processor First position information indicating the first position, second position information indicating the second position, and acquiring predetermined location information indicating a location of the A first maximum light amount indicating a maximum value of the light amount of the first lighting device and a second maximum light amount indicating a maximum value of the light amount of the second lighting device a second maximum light amount indicating a large value; and A dimming level for adjusting the light amount of the first lighting device and the light amount of the second lighting device is received. And the first position information, the second position information, the predetermined position information, the first maximum light amount, 2. Based on the maximum light amount and the dimming level, the contrast correction of the projector is determining a correction value indicative of the degree of A control device that executes the above.

Images