Brightness adjusting system for display of LED display screen

Abstract

The utility model discloses a brightness adjusting system during display of an LED display screen. The brightness adjusting system comprises a plurality of brightness detection modules and a video controller, the plurality of brightness detection modules are arranged on the LED display screen in multiple rows and multiple columns and are used for detecting the ambient brightness of the positions where the brightness detection modules are located respectively; the back face of the LED display screen is fixedly installed on the screen body support, the back face of the screen body support is connected to the installation frame, a plurality of movable plates capable of getting close to and getting away from the LED display screen are arranged on the installation frame in a sliding mode, and the movable plates are arranged at equal intervals in the length direction of the LED display screen. Each movable plate is provided with an adjusting chain and a plurality of chain wheels used for installing the adjusting chain, and the adjusting chains are connected with all the brightness detection modules located in the same column. The lower portion of each movable plate is further provided with an operating mechanism enabling the corresponding adjusting chain to rotate. According to the utility model, the display brightness of a video image on the LED display screen can be adjusted, and the brightness detection module in the system is more convenient to maintain and replace.

Description

Technical Field

[0001] The utility model relates to a brightness adjustment system for an LED display screen, belonging to the technical field of display screens. Background Art

[0002] With the advancement of science and technology, the application performance and display effect requirements for smart display devices are becoming increasingly higher, especially in certain specific occasions where a single complete ultra-large screen display is required.

[0003] For example, many outdoor and semi-outdoor sports venues use LED displays, which are super-large displays. Generally, the height of such LED displays is about 2-8 meters, but the width can reach tens of meters. On a clear day, due to the obstruction of trees or buildings, part of the LED display is exposed to sunlight and part is in the shadow. Although the brightness of the entire screen of the LED display is consistent, the brightness perceived by the human eye is different for the areas exposed to sunlight and those not exposed to sunlight, thus affecting the visual effect of the audience.

[0004] For this type of LED display screen, Chinese patent application number 201620072691.0 discloses a brightness adjustment system for LED display screens, such as Figure 4 As shown, it includes a host computer and a video controller, and the video controller is used to adjust the display brightness of the video image displayed on the LED display screen; the brightness adjustment system also includes multiple brightness detection modules, and the multiple brightness detection modules are distributed on the screen of the LED display screen or on the upper and lower frames in the form of equal spacing; the output ends of the multiple brightness detection modules are all connected to the first input end of the video controller, and the first output end, the second input end and the second output end of the video controller are respectively connected to the input end, the output end of the host computer and the LED display screen; the multiple brightness detection modules respectively detect the ambient brightness of their positions and generate corresponding brightness signals. When the display brightness of the video image displayed on the LED display screen is adjusted, the video controller transfers the brightness information to the host computer, and the host computer feeds back a brightness control signal to the video controller according to the brightness information, and the video controller adjusts the display brightness of the video image displayed in the area corresponding to the brightness control signal on the LED display screen according to the brightness control signal.

[0005] The brightness adjustment system adjusts the display brightness of the video image displayed in the area corresponding to the brightness control signal on the LED display screen, so that people can visually feel that the display brightness of the entire screen of the LED display screen is consistent. However, there are often the following problems: since the brightness detection module is a detection component, it is generally directly exposed to the air to directly and relatively well sense the ambient brightness of the area where it is located, and since the LED display screen is used outdoors, it is affected by various environmental factors, and the exposed brightness detection module and other electronic components are easily damaged. When replacing the brightness detection module in a high-altitude position, the staff needs to climb up to work, which is dangerous and inconvenient, and is affected by the interference of the display screen bracket and is not easy to replace. Utility Model Content

[0006] In view of the deficiencies in the prior art, the present application provides a brightness adjustment system for an LED display screen, which can adjust the display brightness of a video image displayed in an area on the LED display screen corresponding to a brightness control signal, and makes it more convenient to repair and replace the brightness detection module in the system.

[0007] A brightness adjustment system for an LED display screen, comprising a plurality of brightness detection modules, a video controller, and a host computer;

[0008] A plurality of the brightness detection modules are arranged in multiple rows and columns on the LED display screen, respectively detecting the ambient brightness of the location where the modules are located, generating corresponding brightness information, and sending the information to the video controller via wireless transmission;

[0009] When the display brightness of the video image displayed on the LED display screen is adjusted, the video controller transfers the brightness information to the host computer, and the host computer feeds back a brightness control signal to the video controller according to the brightness information, and the video controller adjusts the display brightness of the video image displayed in the area corresponding to the brightness control signal on the LED display screen according to the brightness control signal;

[0010] The back of the LED display screen is fixedly mounted on the screen bracket, characterized in that the back of the screen bracket is connected to the mounting frame, and a plurality of movable plates that can be close to and away from the LED display screen are slidably arranged on the mounting frame, and the plurality of movable plates are arranged at equal intervals along the length direction of the LED display screen, and an adjustment chain and a plurality of sprockets for installing the adjustment chain are provided on each movable plate, and the adjustment chain is connected to all the brightness detection modules in the same row;

[0011] An operating mechanism for rotating the corresponding adjusting chain is also installed at the lower position of each movable plate.

[0012] Preferably, the operating mechanism comprises a worm coaxially connected to the sprocket and an operating turbine rotatably mounted on the movable plate and cooperating with the worm.

[0013] Preferably, the movable plate is also provided with a limit assembly for keeping the adjustment chain in vertical motion; the limit assembly comprises a guide rail with a vertical slide groove, the adjustment chain is stuck in the vertical slide groove, the upper end of the guide rail is higher than the brightness detection module at the highest position, and the lower end of the guide rail is lower than the brightness detection module at the lowest position.

[0014] Preferably, a self-locking mechanism is provided on the adjustment chain, and the self-locking mechanism includes a lock plate connected to the adjustment chain, a lock rod inserted on the lock plate, a connecting spring located between the lock plate and the movable plate is sleeved on the lock rod, and a lock hole cooperating with the lock rod is provided on the movable plate.

[0015] Preferably, the video controller is located at a lower position of one of the movable panels.

[0016] Preferably, a reinforcement strip is provided on the surface of the movable plate, and the reinforcement strip extends from top to bottom.

[0017] Preferably, a plurality of jacks for installing a plurality of the brightness detection modules are formed on the screen of the LED display screen, and the ends of the brightness detection modules are flush with the screen of the LED display screen.

[0018] Preferably, a protective cover is connected to the movable plate, the upper portion of the protective cover is hinged to the movable plate, and the lower portion of the protective cover is connected to the movable plate via a fastener.

[0019] In summary, the utility model has the following beneficial effects:

[0020] 1: The utility model can adjust the display brightness of the video image displayed in the area corresponding to the brightness control signal on the LED display screen, and it is more convenient to repair and replace the brightness detection module in the system.

[0021] 2: The utility model provides a self-locking mechanism, which facilitates the brightness detection module to be reset to its original height position, thereby facilitating the rapid reset of the brightness detection module. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 The schematic diagram of the installation of the brightness detection module in the brightness adjustment system on the display screen at one viewing angle;

[0023] Figure 2 The figure is a schematic diagram of the installation of the brightness detection module in the brightness adjustment system on the display screen at another viewing angle;

[0024] Figure 3This is a schematic diagram of the installation of the self-locking mechanism;

[0025] Figure 4 This is a schematic diagram of the structure of the brightness adjustment system. DETAILED DESCRIPTION

[0026] The present invention will be further described below through specific embodiments in conjunction with the accompanying drawings.

[0027] Example:

[0028] A brightness adjustment system for LED display screens, such as Figure 1 , 4 As shown, as described in the prior art, it includes multiple brightness detection modules 2, a video controller 3, and a host computer; wherein, multiple brightness detection modules 2 are arranged in multiple rows and columns on the LED display screen, respectively detect the ambient brightness of their respective locations, generate corresponding brightness information, and send it to the video controller 3 via wireless transmission. The LED display screen is a spliced ​​screen, and jacks are provided on the screen frames of each unit screen that constitutes the LED display screen, and each jack is correspondingly plugged with a brightness detection module 2. The jacks are provided on the screen frame to avoid affecting the normal image display function of the display screen. When the brightness detection module 2 is arranged, its end is flush with the screen frame of the unit screen to better perceive the ambient brightness of the area.

[0029] When the display brightness of the video image displayed on the LED display screen is adjusted, the video controller 3 transfers the brightness information to the host computer, and the host computer feeds back a brightness control signal to the video controller 3 based on the brightness information. The video controller 3 adjusts the display brightness of the video image displayed in the area corresponding to the brightness control signal on the LED display screen based on the brightness control signal.

[0030] like Figure 2-3 As shown, the back of the LED display is fixedly mounted on the screen bracket 41. In this case, the back of the screen bracket 41 is connected to a mounting frame 42, on which a plurality of movable plates 43 that can be moved closer to and away from the LED display are slidably arranged. The plurality of movable plates 43 are arranged at equal intervals along the length direction of the LED display, and the spacing between them is equal to the column spacing of the brightness detection module 2. Each movable plate 43 is provided with an adjustment chain 44 and a plurality of sprockets 45 for installing the adjustment chain 44. In order to facilitate viewing of the structure in the attached drawings, the adjustment chain 44 is not drawn in full, and the adjustment chain 44 is connected to all the brightness detection modules 2 in the same column; an operating mechanism 46 for rotating the corresponding adjustment chain 44 and a fastening screw 47 for fastening the movable plate 43 to the screen bracket 41 are also installed at the lower position of each movable plate 43.

[0031] When it is necessary to replace the brightness detection module 2 at a high position, find the movable plate 43 corresponding to the brightness detection module 2, loosen the fastening screws, and apply a certain force at the bottom of the movable plate 43 to make the movable plate 43 away from the LED display screen. During the process of moving away, the brightness detection module 2 leaves the socket on the LED display screen. At this time, by operating the corresponding operating mechanism 46 on the movable plate 43, the adjustment chain 44 is rotated. When the adjustment chain 44 rotates, the brightness detection module 2 that needs to be replaced is transferred from a high position to a low position, thereby facilitating maintenance and replacement. After the replacement is completed, the adjustment chain 44 is rotated in the opposite direction through the operating mechanism 46, and the brightness detection module 2 is returned to the original height position. Then, a certain force is applied at the bottom of the movable plate 43 to make the movable plate 43 close to the LED display screen, and finally the brightness detection module 2 is returned to the original socket position.

[0032] The operating mechanism 46 includes a worm 461 coaxially connected to the sprocket 45 and an operating turbine 462 rotatably mounted on the movable plate 43 and cooperating with the worm 461. In the attached drawings, the mounting structures such as the bearing and the bearing seat related to the worm 461 are not drawn. Similarly, the mounting seat and other structures related to the operating turbine 462 are also not drawn. When in use, the worm 461 is rotated by rotating the operating turbine 462, thereby rotating the sprocket 45. The operating mechanism composed of the operating turbine 462 and the worm 461 has its own self-locking function, which can make the brightness detection module 2 stably stay at a certain height position. Therefore, when the faulty brightness detection module 2 is transferred to a low position, it can be kept at the low position for easy replacement. When the brightness detection module 2 is replaced and reset to the original position after a series of operations by the maintenance personnel, the brightness detection module 2 is stably in the original position.

[0033] The movable plate 43 is also provided with a limiter assembly 48 for keeping the adjustment chain 44 in vertical motion; the limiter assembly 48 includes a guide rail with a vertical slide groove, the adjustment chain 44 is stuck in the vertical slide groove, the upper end of the guide rail is higher than the brightness detection module 2 at the highest position, and the lower end of the guide rail is lower than the brightness detection module 2 at the lowest position. When the brightness detection module 2 is replaced and reset to the original height, the chain portion equipped with the brightness detection module 2 is effectively limited to a vertical state, ensuring that the brightness detection module 2 is effectively aligned with the socket, and ensuring that the subsequent brightness detection module 2 can be inserted into the socket.

[0034] The adjustment chain 44 is also provided with a self-locking mechanism 49, which includes a lock plate 491 connected to the adjustment chain 44, a lock rod 492 inserted on the lock plate 491, a connection spring 493 between the lock plate 491 and the movable plate 43, and a lock hole 431 matched with the lock rod 492 is provided on the movable plate 43. When the brightness detection module 2 needs to be replaced, the lock rod 492 is first pulled out of the lock hole 431, and then the operating turbine 462 is rotated. During the rotation of the operating turbine 462, the lock rod 492 moves on the movable plate 43. During the reverse rotation of the operating turbine 462, once the lock rod 492 is realigned with the lock hole 431, the lock rod 492 enters the lock hole 431 under the action of the connection spring 493. At this time, it means that the brightness detection module 2 returns to its original height, and the self-locking mechanism 49 helps to achieve a rapid reset of the brightness detection module 2.

[0035] The video controller 3 may also be damaged and fail. Therefore, the video controller 3 is located at the lower position of one of the movable plates 43 to facilitate the maintenance and replacement of the video controller 3.

[0036] In order to ensure the strength of the movable plate 43 , a reinforcing strip 432 is provided on the surface of the movable plate 43 , and the reinforcing strip 432 extends from top to bottom.

[0037] Embodiment 2: Based on Embodiment 1, a protective cover is connected to the movable plate 43. The upper part of the protective cover is hinged to the movable plate 43, and the lower part is connected to the movable plate 43 by fasteners. The protective cover covers the components on the movable plate 43 to play a safety protection role. The protective cover can be opened from the bottom, which is simple and convenient.

[0038] The above embodiments are only for describing the preferred implementation of the utility model, and are not intended to limit the concept and scope of the utility model. Without departing from the design concept of the utility model, various modifications and improvements made by ordinary persons in the art to the technical solution of the utility model should fall within the protection scope of the utility model, and the technical contents of the utility model for protection have been fully recorded in the claims.

Claims

1. A brightness adjustment system for an LED display screen, comprising a plurality of brightness detection modules (2), a video controller (3), and a host computer; A plurality of the brightness detection modules (2) are arranged in multiple rows and columns on the LED display screen, respectively detecting the ambient brightness at the location where the modules are located, generating corresponding brightness information, and sending the information to the video controller (3) via wireless transmission; When the display brightness of the video image displayed on the LED display screen is adjusted, the video controller (3) transfers the brightness information to the host computer, the host computer feeds back a brightness control signal to the video controller (3) according to the brightness information, and the video controller (3) adjusts the display brightness of the video image displayed in the area corresponding to the brightness control signal on the LED display screen according to the brightness control signal; The back of the LED display screen is fixedly mounted on a screen support (41), and is characterized in that: The back of the screen support (41) is connected to the mounting frame (42), and a plurality of movable plates (43) that can be moved closer to and further away from the LED display screen are slidably provided on the mounting frame (42), and the plurality of movable plates (43) are arranged at equal intervals along the length direction of the LED display screen, and each movable plate (43) is provided with an adjustment chain (44) and a plurality of sprockets (45) for installing the adjustment chain (44), and the adjustment chain (44) is connected to all the brightness detection modules (2) in the same row; An operating mechanism (46) for rotating the corresponding adjustment chain (44) is also installed at the lower position of each movable plate (43).

2. The brightness adjustment system of a LED display screen according to claim 1, characterized in that: The operating mechanism (46) comprises a worm (461) coaxially connected to the sprocket (45) and an operating turbine (462) rotatably mounted on the movable plate (43) and cooperating with the worm (461).

3. The brightness adjustment system of a LED display screen according to claim 1, characterized in that: The movable plate (43) is further provided with a limit assembly (48) for enabling the adjustment chain (44) to maintain vertical movement; the limit assembly (48) comprises a guide rail having a vertical slide groove, the adjustment chain (44) is stuck in the vertical slide groove, the upper end of the guide rail is higher than the brightness detection module (2) at the highest position, and the lower end of the guide rail is lower than the brightness detection module (2) at the lowest position.

4. The brightness adjustment system for an LED display screen according to claim 3, characterized in that: The adjustment chain (44) is provided with a self-locking mechanism (49), the self-locking mechanism (49) comprising a locking plate (491) connected to the adjustment chain (44), a locking rod (492) inserted into the locking plate (491), a connecting spring (493) located between the locking plate (491) and the movable plate (43) being sleeved on the locking rod (492), and a locking hole (431) cooperating with the locking rod (492) being provided on the movable plate (43).

5. The brightness adjustment system for an LED display screen according to claim 1, characterized in that: The video controller (3) is located at a lower position of one of the movable panels (43).

6. The brightness adjustment system for an LED display screen according to claim 1, characterized in that: A reinforcement strip (432) is provided on the surface of the movable plate (43), and the reinforcement strip (432) extends from top to bottom.

7. The brightness adjustment system for an LED display screen according to claim 1, characterized in that: A plurality of sockets for installing a plurality of the brightness detection modules (2) are formed on the screen of the LED display screen, and the ends of the brightness detection modules (2) are flush with the screen of the LED display screen.

8. The brightness adjustment system for an LED display screen according to claim 1, characterized in that: The movable plate (43) is connected to a protective cover, the upper portion of the protective cover is hinged to the movable plate (43), and the lower portion of the protective cover is connected to the movable plate (43) via a fastener.

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