Stadium lighting device and stadium lighting system

Abstract

A stadium lighting device comprises a back plate, a plurality of light-emitting units, a diffuser plate and a grille plate. The back plate has a receiving portion. The plurality of light-emitting units are arranged in the receiving portion. One side of the diffuser plate covers the receiving portion. The grille plate is arranged on the other side of the diffuser plate and comprises a plurality of compartments, each compartment being a rectangular parallelepiped. The light emitted by the plurality of light-emitting units of the stadium lighting device after passing through the diffuser plate and the grille plate is less than or equal to 45° in a direction parallel to the short side of the back plate, and is less than or equal to 77° in a direction parallel to the long side of the back plate. Therefore, the stadium lighting device can provide light with uniform illumination, sufficient brightness and low glare value to enhance the comfort and safety of athletes.

Description

Technical Field

[0001] The present invention relates to a stadium lighting device, in particular to a badminton stadium lighting device, and also relates to a stadium lighting system having the stadium lighting device. Background Art

[0002] With the development of economy, people have become more affluent and the quality of life has been greatly improved. Therefore, people pay more and more attention to health, so sports venues have become a part of people's daily life. Among them, badminton is a very popular and popular sport; therefore, the demand for badminton halls in cities has also increased significantly. However, the lighting conditions of many badminton halls are very simple, with various problems such as uneven illumination, insufficient brightness and even high glare value. This lighting environment greatly affects the comfort and safety of athletes playing. At the same time, this lighting environment will also affect the athletes' sports performance. Summary of the invention

[0003] According to one embodiment of the present invention, a stadium lighting device is provided, which includes a back plate, a plurality of light-emitting units, a diffuser plate and a grille plate. The back plate has a receiving portion. The plurality of light-emitting units are disposed in the receiving portion. One side of the diffuser plate covers the receiving portion. The grille plate is disposed on the other side of the diffuser plate and includes a plurality of compartments, each compartment being a rectangular parallelepiped.

[0004] In one embodiment, the short side of the cuboid corresponds to the short side of the back plate, and the long side of the cuboid corresponds to the long side of the back plate.

[0005] In one embodiment, the distance between any light emitting unit and an adjacent light emitting unit in a direction parallel to the short side of the back plate is greater than or equal to 7 times the length of the short side of the cuboid.

[0006] In one embodiment, after the light emitted by the plurality of light emitting units passes through the diffusion plate and the grid plate, the light emitting angle in the direction parallel to the short side of the back plate is less than or equal to 45°.

[0007] In one embodiment, after the light emitted by the plurality of light emitting units passes through the diffusion plate and the grid plate, the light emission angle in the direction parallel to the long side of the back plate is less than or equal to 77°.

[0008] According to another embodiment of the present invention, a stadium lighting system is provided, which includes a control module and a plurality of stadium lighting devices. The plurality of stadium lighting devices are connected to the control module to receive control signals from the control module. Each stadium lighting device includes a back plate, a plurality of light-emitting units, a diffuser plate and a grille plate. The back plate has a receiving portion. The plurality of light-emitting units are disposed in the receiving portion. One side of the diffuser plate covers the receiving portion. The grille plate is disposed on the other side of the diffuser plate and includes a plurality of compartments, each of which is a rectangular parallelepiped.

[0009] In one embodiment, the short side of the cuboid corresponds to the short side of the back plate, and the long side of the cuboid corresponds to the long side of the back plate.

[0010] In one embodiment, the distance between any light emitting unit and an adjacent light emitting unit in a direction parallel to the short side of the back plate is greater than or equal to 7 times the length of the short side of the cuboid.

[0011] In one embodiment, after the light emitted by the above-mentioned multiple light-emitting units passes through the diffuser and the grille plate, the light output angle in the direction parallel to the short side of the back plate is less than or equal to 45°, and the light output angle in the direction parallel to the long side of the back plate is less than or equal to 77°.

[0012] In one embodiment, the distance between the projection of the center line of one of the hall lighting devices on the ground and the center line of the badminton court is a first distance, and the distance between the projection of the center line of another hall lighting device on the ground and the sideline of the badminton court is a second distance, and the first distance is greater than the second distance.

[0013] As described above, the stadium lighting device and the stadium lighting system according to the embodiments of the present invention may have one or more of the following advantages:

[0014] (1) In one embodiment of the present invention, a stadium lighting device has a plurality of light-emitting units, a diffuser plate and a grille plate. The grille plate is disposed on the diffuser plate and includes a plurality of compartments. Each compartment is a rectangular parallelepiped, and the short side of the rectangular parallelepiped corresponds to the short side of the back plate, and the long side of the rectangular parallelepiped corresponds to the long side of the back plate. Through the above structure, after the light emitted by the above multiple light-emitting units passes through the diffuser plate and the grille plate, the light output angle in the direction parallel to the short side of the back plate is less than or equal to 45°, and the light output angle in the direction parallel to the long side of the back plate is less than or equal to 77°. The light diffusion effect through the diffuser plate, the structural design of the grille plate and the combination of the two can make the illumination of the light emitted by the above multiple light-emitting units uniform, the brightness sufficient and effectively reduce the glare value, so as to improve the comfort and safety of the sports venue.

[0015] (2) In one embodiment of the present invention, the stadium lighting device can effectively adjust the light emission angle of the light emitted by the above-mentioned multiple light-emitting units through the light diffusion effect of the diffusion plate, the structural design of the grille plate and the combination of the two, so as to greatly reduce the glare value, so that no light will be directly hit into the eyes of the athletes, thereby improving the athletes' athletic performance.

[0016] (3) In one embodiment of the present invention, the stadium lighting system has multiple stadium lighting devices, and the positions and tilt angles of the stadium lighting devices are configured through a special configuration method to optimize the performance of the above-mentioned multiple stadium lighting devices, thereby providing lighting with uniform illumination, sufficient brightness and low glare value, which can indeed meet the needs of practical applications and conform to future development trends.

[0017] (4) In one embodiment of the present invention, the stadium lighting system can be applied not only to badminton stadiums, but also to various other sports stadiums, such as basketball stadiums, billiard stadiums, volleyball stadiums, etc., so it is extremely widely applicable and more flexible in use.

[0018] (5) In one embodiment of the present invention, the stadium lighting system can achieve the desired effect without significantly increasing the cost, so it can not only easily achieve a high penetration rate, but also achieve extremely high commercial value. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 An exploded view of a stadium lighting device according to an embodiment of the present invention;

[0020] Figure 2 A combination diagram of a stadium lighting device according to an embodiment of the present invention;

[0021] Figure 3 A bottom view of a grille plate of a stadium lighting device according to an embodiment of the present invention;

[0022] Figure 4 is a cross-sectional view of a stadium lighting device according to an embodiment of the present invention;

[0023] Figure 5 A longitudinal sectional view of a stadium lighting device according to an embodiment of the present invention;

[0024] Figure 6 is a first schematic diagram of a stadium lighting system according to an embodiment of the present invention;

[0025] Figure 7 A second schematic diagram of a stadium lighting system according to an embodiment of the present invention;

[0026] Figure 8 A first schematic diagram of an implementation and application of a stadium lighting system according to an embodiment of the present invention;

[0027] Fig. 9 A second schematic diagram of an implementation of a stadium lighting system according to an embodiment of the present invention;

[0028] Fig.10 It is a third schematic diagram of the implementation and application of the stadium lighting system according to an embodiment of the present invention.

[0029] Description of reference numerals:

[0030] 3- stadium lighting system; 2- control module; 1- stadium lighting device; 11- back panel; 12- light unit; 13- diffusion plate; 14- grille plate; 15- mounting rod; 16- driver; 17- power box; 18- frame; C- accommodating part; BL- compartment; SS- short side of the back panel; LS- long side of the back panel; SS'- short side of the compartment (rectangle); LS'- long side of the compartment (rectangle); θ1, θ2- light output angle; θt- tilt angle; K- center line of the stadium lighting device; GD- ground; P- horizontal plane; SF- badminton court; LN- net; MR- center line of the badminton court; ER- side line of the badminton court; D1- first distance; D2- second distance; Cs- control signal; PL- athlete; B- badminton.

[0031] The detailed features and advantages of the present invention are described in detail in the following embodiments, and the contents are sufficient to enable anyone skilled in the relevant art to understand the technical content of the present invention and implement it accordingly. Moreover, according to the contents, claims and drawings disclosed in this specification, any person skilled in the relevant art can easily understand the purposes and advantages of the present creation. DETAILED DESCRIPTION

[0032] The following will refer to the relevant drawings to illustrate the embodiments of the stadium lighting device and the stadium lighting system according to the present invention. For the sake of clarity and convenience of the diagram description, the components in the drawings may be exaggerated or reduced in size and proportion. In the following description and / or claims, when it is mentioned that a component is "connected" or "coupled" to another component, it may be directly connected or coupled to the other component or there may be an intervening component; and when it is mentioned that a component is "directly connected" or "directly coupled" to another component, there is no intervening component, and other words used to describe the relationship between components or layers should be interpreted in the same way. For ease of understanding, the same components in the following embodiments are illustrated with the same symbols.

[0033] See also Figure 1 and Figure 2 , which is an exploded view and assembly view of a stadium lighting device according to an embodiment of the present invention. As shown in the figure, the stadium lighting device 1 includes a back plate 11, a plurality of light-emitting units 12, a diffusion plate 13, a grid plate 14, two mounting rods 15, a driver 16, a power supply box 17 and a frame 18. The stadium lighting device 1 can be applied to a badminton hall or other indoor sports venues.

[0034] The back plate 11 has a receiving portion C. In one embodiment, the back plate 11 may be made of metal. In another embodiment, the back plate 11 may be made of plastic or other similar materials.

[0035] The plurality of light-emitting units 12 are disposed in the accommodating portion C. In this embodiment, the light-emitting unit 12 may be a light-emitting diode (LED). In another embodiment, the light-emitting unit 12 may be a light-emitting diode array, a light-emitting diode light bar or other similar components.

[0036] One side of the diffusion plate 13 covers the accommodating portion C, so that the plurality of light-emitting units 12 are located between the diffusion plate 13 and the back plate 11. The diffusion plate 13 can provide a light diffusion effect.

[0037] The grid plate 14 is disposed on the other side of the diffuser plate 13 and includes a plurality of compartments BL. Each compartment BL is a rectangular parallelepiped. In another embodiment, the positions of the grid plate 14 and the diffuser plate 13 can also be interchanged, that is, one side of the grid plate 14 covers the accommodating portion C, and the diffuser plate 13 is disposed on the other side of the grid plate 14.

[0038] The two mounting rods 15 can be disposed on the back plate 11, so that the back plate 11 can be locked on the ceiling of the sports venue through the plurality of mounting rods 15. The number of mounting rods 15 can vary according to actual needs and is not limited to the number of this embodiment.

[0039] The driver 16 is connected to the plurality of light emitting units 12, and the power box 17 is connected to the driver 16. The plurality of light emitting units 12 can be powered by the power box 17 and the driver 16 to turn on the plurality of light emitting units 12.

[0040] The frame 18 can be used to accommodate the grille plate 14, the diffuser plate 13, the power box 17 and the driver 16, and can be interlocked with the back plate 11. In one embodiment, the frame 18 can be made of metal. In another embodiment, the frame 18 can be made of plastic or other similar materials.

[0041] See also Figure 3 , Figure 4 and Figure 5 , which is a bottom view of the grille plate of the stadium lighting device according to an embodiment of the present invention, a cross-sectional view of the stadium lighting device, and a longitudinal cross-sectional view of the stadium lighting device. Please also refer to Figure 1 .like Figure 3 As shown, the grid plate 14 includes a plurality of compartments BL, each compartment BL is a cuboid. The short side SS' of the cuboid corresponds to the short side SS of the back plate 11 (i.e., the short side SS' of the cuboid is parallel to the short side SS of the back plate 11), and the long side LS' of the cuboid corresponds to the long side LS of the back plate 11 (i.e., the long side LS' of the cuboid is parallel to the long side LS of the back plate 11).

[0042] like Figure 4As shown, after the light emitted by the plurality of light emitting units 12 passes through the diffuser 13 and the grid plate 14, the light output angle θ1 in the direction parallel to the short side SS of the back plate 11 (i.e., the direction of the cross section) is less than or equal to 45° (i.e., greater than 0° and the maximum value is 45°). In addition, the distance between any light emitting unit 12 and the adjacent light emitting unit 12 in the direction parallel to the short side SS of the back plate 11 (i.e., the direction of the cross section) is greater than or equal to 7 times the length of the short side of the cuboid.

[0043] like Figure 5 As shown, after the light emitted by the above-mentioned multiple light-emitting units 12 passes through the diffuser 13 and the grid plate 14, the light output angle θ2 in the direction parallel to the long side LS of the back plate 11 (i.e., the direction of the longitudinal section) is less than or equal to 77° (i.e., greater than 0° and the maximum value is 77°).

[0044] Through the above structural design, the light emitted by the above multiple light-emitting units 12 passes through the diffuser 13 and the grille plate 14, and the light angle θ1 in the direction parallel to the short side SS of the back plate 11 is less than or equal to 45°, and the light angle θ2 in the direction parallel to the long side LS of the back plate 11 is less than or equal to 77°. The light diffusion effect through the diffuser 13, the structural design of the grille plate 14, and the combination of the two can make the illumination of the light emitted by the above multiple light-emitting units 12 uniform, sufficient brightness, and effectively reduce the glare value, so as to improve the comfort and safety of the sports venue.

[0045] Of course, this embodiment is only used for illustration and is not intended to limit the scope of the present invention. Equivalent modifications or changes made to the stadium lighting device 1 according to this embodiment should still be included in the patent scope of the present invention.

[0046] See also Figure 6 and Figure 7 , which are the first and second schematic diagrams of a stadium lighting system according to an embodiment of the present invention. As shown in the figure, the stadium lighting system 3 includes a control module 2 and four stadium lighting devices 1. The structures of the above-mentioned multiple stadium lighting devices 1 can be referred to Figure 1-5 Of course, the number of the stadium lighting devices 1 can vary according to actual needs and is not limited to the number of this embodiment.

[0047] The control module 2 can be connected to the above-mentioned multiple stadium lighting devices 1 in a wireless manner. The user can transmit the control signal Cs to the above-mentioned multiple stadium lighting devices 1 through the control module 2 to turn on or off the above-mentioned multiple stadium lighting devices 1, or adjust the brightness, color temperature and other parameters of the above-mentioned multiple stadium lighting devices 1. In another embodiment, the control module 2 can also be connected to the above-mentioned multiple stadium lighting devices 1 in a wired manner. In this embodiment, the control module 2 can be a laptop computer. In another embodiment, the control module 2 can also be a smart phone, a personal computer, a tablet computer, a wall switch or other similar components.

[0048] The distance between the projection of the center line K of the two center hall lighting devices 1 on the ground GD and the center line MR of the badminton court SF (the center line MR coincides with the net LN) is the first distance D1, and the distance between the projection of the center line K of the two side hall lighting devices 1 on the ground GD and the side line ER of the badminton court SF is the second distance D2. The first distance D1 is greater than the second distance D2; the first distance D1 can be 1.2 to 2 times the second distance D2. In this embodiment, the first distance D1 is 1.5 times the second distance D2; for example, the first distance D1 is 1.5m, and the second distance D2 is 1m.

[0049] The height of the stadium lighting device 1 from the ground GD can be 8-12m; in this embodiment, the height of the stadium lighting device 1 from the ground GD is 10m.

[0050] The two center stadium lighting devices 1 are horizontally arranged (i.e. parallel to the horizontal plane P), while the two stadium lighting devices 1 located on the two sides can be slightly inclined, and their inclination angle θt (i.e. the angle with the horizontal plane P) can be 3°-17°. In this embodiment, the inclination angle θt of the two stadium lighting devices 1 located on the two sides is 5°. In another embodiment, the inclination angle θt of the two stadium lighting devices 1 located on the two sides can also be 15°.

[0051] As can be seen from the above, the stadium lighting system 3 has multiple stadium lighting devices 1, and the positions and tilt angles of the stadium lighting devices 1 are configured in a special configuration method to optimize the performance of the multiple stadium lighting devices 1, so that it can provide lighting with uniform illumination, sufficient brightness and low glare value, which can indeed meet the needs of practical applications and meet the trend of future development. In addition, the stadium lighting system 3 is not limited to badminton halls, but can also be applied to various other sports venues, such as basketball halls, billiard halls, volleyball halls, etc.

[0052] It is worth mentioning that the lighting conditions of existing badminton halls are very simple, with various problems such as uneven illumination, insufficient brightness and even high glare values. This lighting environment greatly affects the comfort and safety of athletes playing. On the contrary, according to an embodiment of the present invention, the hall lighting device has multiple light-emitting units, a diffuser and a grille plate. The grille plate is arranged on the diffuser and includes multiple compartments. Each compartment is a rectangular parallelepiped, and the short side of the rectangular parallelepiped corresponds to the short side of the back plate, and the long side of the rectangular parallelepiped corresponds to the long side of the back plate. Through the above structure, the light emitted by the above multiple light-emitting units passes through the diffuser and the grille plate. The light angle is less than or equal to 45° in the direction parallel to the short side of the back plate, and less than or equal to 77° in the direction parallel to the long side of the back plate. The light diffusion effect through the diffuser, the structural design of the grille plate and the combination of the two can make the illumination of the light emitted by the above multiple light-emitting units uniform, sufficient brightness and effectively reduce the glare value, so as to improve the comfort and safety of the sports venue.

[0053] In addition, due to the poor lighting environment of existing badminton halls, it will also affect the athletic performance of athletes. On the contrary, according to the embodiments of the present invention, the hall lighting device can effectively adjust the light emission angle of the light emitted by the above-mentioned multiple light-emitting units through the light diffusion effect of the diffusion plate, the structural design of the grille plate and the combination of the two, so that the glare value can be greatly reduced, so that no light directly hits the athlete's eyes, so that the athlete's athletic performance is better.

[0054] In addition, according to an embodiment of the present invention, the stadium lighting system has multiple stadium lighting devices, and the positions and inclination angles of the stadium lighting devices are configured through a special configuration method to optimize the performance of the above-mentioned multiple stadium lighting devices, thereby providing lighting with uniform illumination, sufficient brightness and low glare value, which can indeed meet the needs of practical applications and conform to future development trends.

[0055] In addition, according to the embodiment of the present invention, the stadium lighting system can be applied not only to badminton halls, but also to various other sports venues, such as basketball halls, billiard halls, volleyball halls, etc., so it is extremely widely applicable and more flexible in use.

[0056] Furthermore, according to the embodiments of the present invention, the stadium lighting system can achieve the desired effect without significantly increasing the cost, so it can not only easily achieve a high popularity rate, but also achieve extremely high commercial value. From the above, it can be seen that the stadium lighting device and the stadium lighting system according to the embodiments of the present invention can indeed achieve excellent technical effects.

[0057] See also Figure 8 , Fig. 9 and Fig.10, which are the first schematic diagram, the second schematic diagram and the third schematic diagram of the implementation and application of the stadium lighting system of an embodiment of the present invention; this embodiment illustrates the implementation and application of the stadium lighting system 3 applied to the badminton court SF. Figure 8 Indicates the player PL's batting state in the front court of the badminton court SF. There is no direct light from the hall lighting device 1 within the player PL's field of vision. When batting in the front court, the ball is usually slow and low, so the player PL does not need to raise his head to bat. When the player PL follows the trajectory of the badminton B, there is no direct light from the hall lighting device 1 within the range of the naked eye, which can prevent the light from interfering with the player PL's batting judgment.

[0058] Fig. 9 It shows the player PL hitting the ball in the middle of the badminton court SF. There is no direct light from the hall lighting device 1 in the player PL's field of vision. The player PL jumps up, slightly tilts his head, and follows the movement track of the badminton B. There is no direct light from the hall lighting device 1 in the field of vision of the naked eye, which can prevent the light from interfering with the player PL's hitting judgment.

[0059] Fig.10 It shows the player PL hitting the ball in the backcourt of the badminton court SF. There is no direct light from the hall lighting device 1 in the player PL's field of vision. The player PL jumps up, with his head slightly tilted up, and the player PL's eyes follow the movement track of the badminton B. There is no direct light from the hall lighting device 1 in the field of vision of the naked eye, which can prevent the light from interfering with the player PL's hitting judgment.

[0060] From the above, it can be seen that the stadium lighting system 3 configures the position and tilt angle of the stadium lighting device 1 through a special configuration method, so as to optimize the performance of the above-mentioned multiple stadium lighting devices 1, thereby providing lighting with uniform illumination, sufficient brightness and low glare value, and will not generate light directly hitting the eyes of the athletes PL, thereby significantly improving the athletic performance of the athletes PL.

[0061] In summary, according to an embodiment of the present invention, a stadium lighting device has a plurality of light-emitting units, a diffuser plate and a grille plate. The grille plate is arranged on the diffuser plate and includes a plurality of compartments. Each compartment is a rectangular parallelepiped, and the short side of the rectangular parallelepiped corresponds to the short side of the back plate, and the long side of the rectangular parallelepiped corresponds to the long side of the back plate. Through the above structure, the light emitted by the above multiple light-emitting units after passing through the diffuser plate and the grille plate is less than or equal to 45° in the direction parallel to the short side of the back plate, and less than or equal to 77° in the direction parallel to the long side of the back plate. The light diffusion effect through the diffuser plate, the structural design of the grille plate and the combination of the two can make the illumination of the light emitted by the above multiple light-emitting units uniform, the brightness sufficient and effectively reduce the glare value, so as to improve the comfort and safety of the sports venue.

[0062] Furthermore, according to an embodiment of the present invention, the stadium lighting device can effectively adjust the light emission angle of the light emitted by the above-mentioned multiple light-emitting units through the light diffusion effect of the diffusion plate, the structural design of the grille plate and the combination of the two, so as to greatly reduce the glare value, so that no light directly hitting the athlete's eyes will be generated, thereby improving the athlete's athletic performance.

[0063] In addition, according to an embodiment of the present invention, the stadium lighting system has multiple stadium lighting devices, and the positions and inclination angles of the stadium lighting devices are configured through a special configuration method to optimize the performance of the above-mentioned multiple stadium lighting devices, thereby providing lighting with uniform illumination, sufficient brightness and low glare value, which can indeed meet the needs of practical applications and conform to future development trends.

[0064] In addition, according to the embodiment of the present invention, the stadium lighting system can be applied not only to badminton halls, but also to various other sports venues, such as basketball halls, billiard halls, volleyball halls, etc., so it is extremely widely applicable and more flexible in use.

[0065] Furthermore, according to the embodiments of the present invention, the stadium lighting system can achieve the desired effect without significantly increasing the cost, so it can not only easily achieve a high penetration rate, but also achieve extremely high commercial value.

[0066] It should be noted that, although the above embodiments have been described in this article, the scope of patent protection of the present invention is not limited thereby. Therefore, based on the innovative concept of the present invention, changes and modifications made to the embodiments described herein, or equivalent structures or equivalent process changes made using the contents of the present specification and drawings, directly or indirectly applying the above technical solutions to other related technical fields are all included in the scope of protection of the patent of the present invention.

Claims

1. A stadium lighting device, characterized in that: Include: A back plate having a receiving portion; A plurality of light emitting units are disposed in the accommodation portion; a diffusion plate, one side of which covers the accommodating portion; and A grid plate, arranged on the other side of the diffusion plate, and comprising a plurality of compartments, each of which is a cuboid, the short side of the cuboid corresponds to the short side of the back plate, so that the short side of the cuboid is parallel to the short side of the back plate, and the long side of the cuboid corresponds to the long side of the back plate, so that the long side of the cuboid is parallel to the long side of the back plate; The light emitted by the multiple light-emitting units has an output angle of less than or equal to 45° in a direction parallel to the short side of the back plate after passing through the diffuser plate and the grille plate, and the light emitted by the multiple light-emitting units has an output angle of less than or equal to 77° in a direction parallel to the long side of the back plate after passing through the diffuser plate and the grille plate.

2. The stadium lighting device according to claim 1, characterized in that: The distance between any one of the light emitting units and the adjacent light emitting unit in a direction parallel to the short side of the back plate is greater than or equal to 7 times the length of the short side of the cuboid.

3. A stadium lighting system, characterized in that: Include: a control module; and A plurality of stadium lighting devices are connected to the control module to receive control signals from the control module, each of the stadium lighting devices comprising: A back plate having a receiving portion; A plurality of light emitting units are disposed in the accommodation portion; a diffusion plate, one side of which covers the accommodating portion; and A grid plate, arranged on the other side of the diffusion plate, and comprising a plurality of compartments, each of which is a cuboid, the short side of the cuboid corresponds to the short side of the back plate, so that the short side of the cuboid is parallel to the short side of the back plate, and the long side of the cuboid corresponds to the long side of the back plate, so that the long side of the cuboid is parallel to the long side of the back plate; The light emitted by the multiple light-emitting units has an output angle of less than or equal to 45° in a direction parallel to the short side of the back plate after passing through the diffuser plate and the grille plate, and the light emitted by the multiple light-emitting units has an output angle of less than or equal to 77° in a direction parallel to the long side of the back plate after passing through the diffuser plate and the grille plate.

4. The stadium lighting system according to claim 3, characterized in that: The distance between any one of the light emitting units and the adjacent light emitting unit in a direction parallel to the short side of the back plate is greater than or equal to 7 times the length of the short side of the cuboid.

5. The stadium lighting system according to claim 3, characterized in that: The distance between the projection of the center line of one of the hall lighting devices on the ground and the center line of the badminton court is a first distance, and the distance between the projection of the center line of the other hall lighting device on the ground and the sideline of the badminton court is a second distance, and the first distance is greater than the second distance.

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