Lighting control system and control device

Abstract

To provide an illumination control system and a control device capable of reducing power consumption while securing stable color rendering properties for camera photographing.SOLUTION: An illumination control system according to an embodiment of the present disclosure includes a plurality of illumination devices that are installed in a stadium and each include a first light source group and a second light source group having higher color rendering than the first light source group, the plurality of illumination devices illuminating respective regions in the stadium, and a control device including a detector that detects a region of interest of a game performed in the stadium, and a controller that turns on the first light source group and the second light source group of an illumination device that illuminates the region of interest among the plurality of illumination devices based on a detection result of the detector.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a lighting control system that includes a plurality of lighting devices installed in a stadium where, for example, baseball games are played. [Background technology]

[0002] Conventionally, sports stadium facilities used for television filming have had lighting towers equipped with light sources with good color rendering and high efficiency (Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 6-295604 Summary of the Invention [Problem to be solved by the invention]

[0004] However, in conventional sports stadium lighting towers, a light source with good color rendering and a light source with good efficiency are always turned on, and depending on the object or camera angle of view, even objects that do not require color reproduction are illuminated with a light source with good color rendering, resulting in the problem of consuming excess power.

[0005] In view of the above circumstances, an object of the present invention is to provide a lighting control system and a control device that can reduce power consumption while ensuring stable color rendering properties for camera photography. [Means for solving the problem]

[0006] A lighting control system according to one aspect of the present invention includes a plurality of lighting devices and a control device. The plurality of lighting devices are installed within the stadium and have a first group of light sources and a second group of light sources having higher color rendering than the first group of light sources, and illuminate respective areas within the stadium. The control device has a detection unit that detects an area of ​​interest of the competition being held at the stadium, and a control unit that turns on the first light source group and the second light source group of the lighting devices that illuminate the area of ​​interest among the plurality of lighting devices based on the detection result of the detection unit.

[0007] The area of ​​interest may be an area to which a television camera is directed to broadcast the event.

[0008] The area of ​​interest may be a playing area where play is taking place in the sport.

[0009] Based on the detection result of the detection unit, the control unit may turn on the first light source group of the lighting device that illuminates a non-attention area other than the attention area among the plurality of lighting devices, and may set the output of the second light source group to be weaker than the output of the second light source group of the lighting device that illuminates the attention area.

[0010] The control unit may not turn on the second light source group.

[0011] The plurality of lighting devices may further include a third light source group that is turned on by the control unit when illuminating the non-target area.

[0012] An average color rendering index Ra when the first light source group and the second light source group are turned on may be 80 or more.

[0013] The detection section may detect the region of interest based on a camera image broadcast by the television camera.

[0014] The competition may be broadcast or shown on television, internet, or internet-streamed video.

[0015] A control device according to an embodiment of the present invention includes a detection unit and a control unit. The detection unit detects an area of ​​interest in a sport being played in a stadium. Based on the detection results of the detection unit, the control unit turns on the first light source group and the second light source group of the lighting device that illuminates the area of ​​interest out of a plurality of lighting devices that are installed within the stadium and that have a first light source group and a second light source group that has higher color rendering than the first light source group and illuminates each area within the stadium. [Effects of the Invention]

[0016] According to the present invention, it is possible to reduce power consumption while ensuring stable color rendering properties for camera photography. [Brief explanation of the drawings]

[0017] [Figure 1] 1 is a diagram showing a lighting control system according to a first embodiment of the present invention installed in a baseball stadium. [Figure 2] 1 is a block diagram of a lighting control system according to a first embodiment of the present invention. [Figure 3] FIG. 1 is a diagram illustrating a lighting device of a lighting control system. [Figure 4] 10 is a flowchart relating to the control device. [Figure 5] FIG. 4 is a diagram showing an illumination device according to a second embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0018] Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

[0019] First Embodiment Fig. 1 is a diagram showing a lighting control system 1 according to a first embodiment of the present invention installed in a baseball stadium S, Fig. 2 is a block diagram of the lighting control system 1 according to the first embodiment of the present invention, and Fig. 3 is a diagram showing a lighting device 10 of the lighting control system 1.

[0020] [Lighting control system] The lighting control system 1 of this embodiment is installed, for example, in an outdoor baseball stadium S. The lighting control system 1 includes a lighting device 10, a sensor device 20, and a control device 30. The control device 30 includes an acquisition unit 31, a determination unit 32B (detection unit), a control unit 33B, and a storage unit 34B. The control device 30 may be attached to the lighting device 10, for example, but is not limited to this. In this embodiment, baseball is played at the outdoor baseball stadium S, but it may also be an indoor baseball stadium (dome stadium). Of course, this is not limited to this, and other sports played in other stadiums (including indoor and outdoor stadiums), such as soccer, track and field, and volleyball, may also be used. In this embodiment, the sports are broadcast on television programs, but of course this is not limited to this, and they may also be streamed or broadcast via internet broadcast or internet streaming video. Examples of sports include professional sports (such as professional baseball and the All-Japan Track and Field Championships) and student tournaments (such as Koshien, the National Inter-High School Championships, and the Spring High School Volleyball Tournament).

[0021] (Lighting equipment) In this embodiment, as shown in FIG. 1, the lighting device 10 is installed in the stadium S and illuminates the competition area S1 (area) within the stadium S by emitting illumination light. The lighting device 10 has a dimming function that can be controlled by a control device 30 (described later), making it possible to adjust the output (illuminance) of the illumination light. As shown in FIG. 1, multiple lighting devices 10 are installed, each illuminating the competition area S1 within the stadium S. The illumination ranges of the multiple lighting devices 10A-10F are arranged so that they at least partially overlap. In this embodiment, the number of lighting devices 10A-10F is six, but this is not limited to this and may be five or fewer, or seven or more. Furthermore, in this embodiment, the multiple lighting devices 10A-10F emit illumination light from lighting fixtures 101 installed at the top of supports T installed outside the stadium S. However, this is not limited to this and the lighting devices may be installed on the roof of the stadium S, for example.

[0022] In this embodiment, the first lighting device 10A illuminates the first competition area S1A, the second lighting device 10B illuminates the second competition area S1B, the third lighting device 10C illuminates the third competition area S1C, the fourth lighting device 10D illuminates the fourth competition area S1D, the fifth lighting device 10E illuminates the fifth competition area S1E, and the fifth lighting device 10F illuminates the fifth competition area S1F.

[0023] The illumination light is a mixture of first and second illumination lights, which will be described later. The illumination light in this embodiment is white, and has a correlated color temperature of 3250K or higher and 7100K or lower. The general color rendering index Ra when the first and second illumination lights are mixed is 80 or higher. Here, white includes not only white, but also warm white, neutral white, daylight white, and light colors whose chromaticity is between these.

[0024] 3, the lighting device 101 has a first light source group 101A and a second light source group 101B. In this embodiment, the first light source group 101A and the second light source group 101B are configured with LEDs, but of course, this is not limited to this.

[0025] In this embodiment, the first illumination light emitted from the first light source group 101A is white, with a correlated color temperature of 3250K or higher and 7100K or lower. The general color rendering index Ra of the first illumination light is 60 or higher. Here, white includes not only white but also warm white, neutral white, daylight white, and light colors with chromaticities between these. Furthermore, the first light source group 101A includes 24 first light sources arranged in three rows, but this is not limited thereto. The first light source group 101A may also include four rows or 30 or more first light sources. The first light source group 101A is also configured with high-efficiency LEDs that can ensure desired brightness with less power than the second light source group 101B (described later). The LEDs that make up the first light source group 101A are, for example, a combination of a blue LED and a yellow phosphor, but this is not limited thereto.

[0026] In this embodiment, the second illumination light emitted from the second light source group 101B is white, and its correlated color temperature is 3250K or higher and 7100K or lower. Here, white includes not only white but also warm white, neutral white, daylight white, and light colors with chromaticities between these. The general color rendering index Ra of the second illumination light is higher than that of the first illumination light and is 90 or higher. Furthermore, the second light sources constituting the second light source group 101B are arranged in a single row of six, but this is not limited to this, and they may also be arranged in two rows or ten or more. The LEDs constituting the second light source group 101B are, for example, a combination of a blue LED and a yellow phosphor, but this is not limited to this.

[0027] (sensor device) The sensor device 20 outputs a sensor signal related to a focus area of ​​a sport being held in the stadium S. Here, the focus area refers to the playing area that is attracting attention in that sport. More specifically, for example, when a television camera of a television station broadcasting the sport is pointed at the sport, the focus area is the playing area that the television camera is pointed at. In other words, when a first television camera is pointed at a first playing area S1A (between home base and first base in this embodiment) and a second television camera is pointed at a second playing area S1B (between first base and right field in this embodiment), the focus areas are the first playing area S1A and the second playing area S1B.

[0028] The sensor device 20A includes, for example, a gyro sensor, an acceleration sensor, an orientation sensor, or a sensor that combines these, and the sensor is provided in the television camera. The sensor device 20A detects the direction and attitude of the television camera. Furthermore, the sensor is not limited to the above-mentioned sensors, and may also detect, for example, the direction and attitude of the television camera captured by the camera.

[0029] (Control device) The control device 30 has an acquisition unit 31. The acquisition unit 31 acquires the sensor signal output by the above-mentioned sensor device 20. In other words, the acquisition unit 31 acquires information about the area of ​​interest output by the sensor device 20 (for example, that the first television camera is pointed at the first competition area S1A).

[0030] The control device 30 also has a determination unit 32 (detection unit). The determination unit 32 determines (detects) an attention area of ​​the competition held in the competition venue S.

[0031] The determination unit 32 determines which of the playing areas S1A-S1F the television camera is facing based on the sensor signal acquired by the acquisition unit 31. For example, the determination unit 32 determines that the first playing area S1A is the area of ​​interest because the output sensor signal indicates that the television camera is facing the first base side. Furthermore, if the television camera is facing an area not illuminated by the illumination light of the lighting device 10 (a non-playing area), the determination unit 32 determines that the television camera is not facing any of the playing areas S1A-S1F.

[0032] A television camera pointed toward a non-playing area will be described, for example, as a case where a baseball stadium has no roof and no lighting pointing toward the sky, causing the ball to fly high into the sky. In such a situation, the television camera is pointed toward the sky. However, the sky does not fall within any of the playing areas S1A to S1F. As a result, the determination unit 32 determines that the television camera is not pointed toward any of the playing areas S1A to S1F.

[0033] The control device 30 also includes a control unit 33. The control unit 33 controls the outputs of the first light source group 101A and the second light source group 101B of the lighting device 10 based on the determination result of the determination unit 32 described above.

[0034] Based on the determination result of the determination unit 32, the control unit 33 turns on the first light source group 101A and the second light source group 101B of the lighting device 10 that illuminates the target area among the plurality of lighting devices 10.

[0035] For example, when the first competition area S1A is determined to be the area of ​​interest based on the judgment result of the judgment unit 32, the control unit 33 turns on the first light source group 101A and the second light source group 101B of the lighting device 10A that illuminates the first competition area S1A.

[0036] In addition, for example, when the first competition area S1A is determined to be the focus area based on the judgment result of the judgment unit 32, the control unit 33 turns on the first light source group 101A of the lighting device that illuminates competition areas other than the first competition area S1A (non-focus areas), and makes the output of the second light source group 101B weaker than the output of the second light source group 101B of the lighting device 10A that illuminates the first competition area S1A.

[0037] That is, the control unit 33 causes the output of the second light source group 101B to differ between the lighting device illuminating the target area and the lighting device illuminating the non-target area (reducing the output of the second light source group 101B of the lighting device illuminating the non-target area). The output of the first light source group 101A may be the same or substantially the same between the lighting device illuminating the target area and the lighting device illuminating the non-target area, or may be different between the lighting device illuminating the target area and the lighting device illuminating the non-target area. While the output of the second light source group 101B of the lighting device illuminating the non-target area is reduced in this embodiment, the present invention is not limited to this. The second light source group 101B of the lighting device illuminating the non-target area may not be turned on (turned off or extinguished). The control unit 30 may also perform dimming control so as to gradually (stepwise) increase the luminance (illuminance) when emitting (turning on) the second light source group 101B, and gradually (stepwise) decrease the luminance (illuminance) when turning off the second light source group 101B.

[0038] The control device 30 has a memory unit 34. The memory unit 34 stores information about each competition area S1. The information about the competition areas S1 includes, for example, the characteristics of each competition area S1A-S1F, the direction in which each competition area is located, and which competition area each lighting device 10A-10F will illuminate. The memory unit 34 is made up of a storage device such as a semiconductor memory or a hard disk drive, and stores programs and calculation parameters for executing various functions such as the determination unit 32 and control unit 33.

[0039] (Flowchart of the control device) 4 is a flowchart related to the control device 30. In this flowchart, the first competition area S1 is the area of ​​interest.

[0040] First, the acquisition unit 31 of the control device 30 acquires the sensor signal output from the sensor device 20 (S101).

[0041] Next, the determination unit 32 determines whether or not a region of interest exists (S102).

[0042] Next, if the determination unit 32 determines that a region of interest exists (YES in S102), the control unit 33 turns on the first light source group 101A and the second light source group 101B of the lighting device that illuminates the region of interest (S103).

[0043] Next, the control unit 33 turns on the first light source group 101A of the lighting device that illuminates the non-target area, and makes the output of the second light source group 101B weaker than the output of the second light source group 101B of the lighting device that illuminates the target area (S104).

[0044] This makes it possible to reduce power consumption while ensuring stable color rendering properties for camera photography.

[0045] In other words, in the past, both light sources with good color rendering and light sources with good efficiency were always turned on, resulting in the problem of consuming excess power because the light sources with good color rendering were used to illuminate the target area and non-target areas (objects not requiring color reproduction) that are not captured by the camera. In contrast, in this embodiment, the second light source group 101B with good color rendering is turned on for the target area, which is the area of ​​interest that the television camera is aimed at, and the output of the second light source group 101B of the lighting device that illuminates the non-target area is reduced. This ensures stable color rendering for camera capture while reducing power consumption by reducing the output of the second light source group 101B in areas not captured by the television camera (non-target area). Furthermore, as described above, the control device 30 can perform dimming control to gradually (stepwise) increase the luminance (illuminance) when illuminating (turning on) the second light source group 101B and gradually (stepwise) decrease the luminance (illuminance) when turning off the second light source group 101B, thereby enabling switching to high color rendering lighting without causing a sense of discomfort to the audience.

[0046] Furthermore, since the attention area is the shooting area to which the television camera is directed, even if the television camera is switched, the area shot by the television camera is already illuminated by the first light source group 101A and the second light source group 101B. In other words, even if the television camera is switched, the color rendering properties of the image shot by the television camera can always be ensured.

[0047] <First Modification> In the above embodiment, the area of ​​interest is the area to which the television camera is directed, but of course this is not limited to this and the playing area of ​​the game being broadcast by the television camera may be the area of ​​interest. In this case, the acquisition unit 31 receives a video signal of the game being broadcast, and the determination unit 32 determines (detects) the area of ​​interest based on the video signal. For example, if the player at first base is being shown on television, the first playing area S1A is detected as the area of ​​interest.

[0048] This allows the second light source group 101B, which has good color rendering properties, to be turned on only in the competition area being broadcast on television, thereby further reducing power consumption.

[0049] <Second Modification> In the above embodiment, the area of ​​interest is the area to which a television camera is directed. However, this is not limiting and the area of ​​interest may be the playing area where the main play of the game is taking place. In this case, for example, the lighting control system further includes an imaging unit that captures images of the inside of the playing field S, and the area of ​​interest is determined (detected) based on the play during the game captured by the imaging unit. That is, the image signal from the imaging unit is acquired by the acquisition unit 31, and the determination unit 32 determines the area of ​​interest based on the image signal acquired by the acquisition unit 31. For example, if a third base runner is sandwiched between fielders at third base and home base, the sixth playing area S1F may be the area of ​​interest. (Of course, this is not limited to baseball; in soccer, the area of ​​interest may be the area where a player in possession of the ball is located.)

[0050] In other words, since the playing area where the game is being played may be broadcast on television, by designating the playing area as the area of ​​interest, the playing area is illuminated in advance by the second light source group 101B, which has good color rendering properties. This ensures color rendering properties when the game is broadcast on television. Furthermore, by designating the playing area where the game is being played as the area of ​​interest, the power consumption of the lighting device 10 can be further reduced.

[0051] In this modification, the playing area where the play is taking place is set as the area of ​​interest, but this is not limited to this, and a specific playing area may be set as the area of ​​interest based on the action specific to the game. For example, if an outfielder is playing deeper than his usual defensive position, the determination unit 32 determines that this batter will hit a long ball, and the control unit 33 causes the outfield area to be illuminated in advance by the second light source group 101B.

[0052] That is, the play is predicted in advance and the lighting device 10 is controlled based on the prediction, which makes it easy to respond to the change of television camera even if the camera is changed.

[0053] <Second embodiment> In the above embodiment, the lighting device 10 has a first light source group 101A and a second light source group 101B, and controls lighting depending on whether the area is a focus area or a non-focus area. However, this is not limited to this, and the lighting device 10 may be configured to further have a third light source group 101C. Fig. 5 is a diagram showing a lighting device 10' according to a second embodiment of the present invention. Below, descriptions of parts similar to those of the first embodiment in terms of configuration and operation will be omitted or simplified, and the following description will focus on parts that are different from the first embodiment.

[0054] 5, in this embodiment, lighting fixture 101' of lighting device 10' further includes third light source groups 101C below second light source group 101B, the same number of which is the same as that of second light source group 101B. In this embodiment, the output (brightness) when third light source group 101C is turned on is the same as or approximately the same as the output (brightness) when second light source group 101B is turned on, but of course this is not limited to this.

[0055] In this embodiment, the third light source group 101C has the same configuration as the first light source group 101A described above, but of course it is not limited to this and may be different.

[0056] Furthermore, the control device 30 controls the third light source group 101C so that it is not turned on when illuminating the region of interest, but is turned on when illuminating the region of non-interest. As a result, even if the output of the second light source group 101B is reduced (turned off or turned off) when illuminating the region of non-interest, the brightness can be compensated for by turning on the third light source group 101C, and brightness can be ensured for the user watching television (making television easier to watch).

[0057] <Other variations> In the above embodiment, the lighting device 10 controls the light sources to be turned on based on the area of ​​interest to which the television camera is pointed, but of course this is not limited to this, and the light sources to be turned on may also be controlled based on the television camera that is shooting.

[0058] When there are multiple television cameras, the color tone of the images output by each television camera may differ. For this reason, the color information of the image from one television camera is compared with the images from the other television cameras, and the output of the lighting device 10 is controlled so that the color tone approaches that of the image from one television camera (so that the RGB color difference is reduced).

[0059] That is, the control device further includes a comparison unit that compares the RGB color differences of the images from each television camera, and controls the output of the lighting device 10 when shooting with each television camera based on the comparison results from the comparison unit using the control unit 33. This reduces the sense of incongruity felt by users watching television even when the television camera is switched.

[0060] Although the embodiments of the present invention have been described above, it goes without saying that the present invention is not limited to the above-described embodiments and that various modifications can be made. [Explanation of symbols]

[0061] 1. Lighting control system 10...Lighting equipment 30...Control device 31…Acquisition part 32…Judgment section 33...Control unit 34...Storage section

Claims

1. a plurality of lighting devices installed within the stadium, each having a first light source group and a second light source group having a higher color rendering than the first light source group, and illuminating respective areas within the stadium; a control device having a detection unit that detects an area of ​​interest of a competition held at the competition venue, and a control unit that turns on the first light source group and the second light source group of lighting devices that illuminate the area of ​​interest among the plurality of lighting devices based on the detection result of the detection unit; A lighting control system comprising:

2. 2. A lighting control system according to claim 1, The area of ​​interest is the area to which television cameras broadcasting the event are directed. Lighting control system.

3. 2. A lighting control system according to claim 1, The area of ​​interest is the playing area where play is taking place in the game. Lighting control system.

4. 2. A lighting control system according to claim 1, The control unit turns on the first light source group of the lighting device that illuminates a non-attention area other than the attention area among the plurality of lighting devices based on the detection result of the detection unit, and makes the output of the second light source group weaker than the output of the second light source group of the lighting device that illuminates the attention area. Lighting control system.

5. 5. A lighting control system according to claim 4, The control unit does not turn on the second light source group. Lighting control system.

6. 6. A lighting control system according to claim 4 or 5, The plurality of lighting devices further include a third light source group that is turned on by the control unit when illuminating the non-attention area. Lighting control system.

7. 2. A lighting control system according to claim 1, The average color rendering index Ra when the first light source group and the second light source group are turned on is 80 or more. Lighting control system.

8. 3. A lighting control system according to claim 2, The detection unit detects the region of interest based on a camera image broadcast by the television camera. Lighting control system.

9. 2. A lighting control system according to claim 1, The competition will be broadcast or shown on television, internet or internet-streamed video. Lighting control system.

10. a detection unit for detecting an area of ​​interest of a sport being played in a stadium; a control unit that, based on the detection result of the detection unit, turns on the first light source group and the second light source group of lighting devices that are installed in the stadium and that illuminate the area of ​​interest out of a plurality of lighting devices that illuminate respective areas in the stadium, the first light source group and the second light source group having a higher color rendering than the first light source group; A control device comprising:

Images