Micro-spacing LED display screen

Abstract

The invention discloses a micro-spacing LED display screen which comprises a box body, a bottom shell and a plurality of display lamp panels connected to the bottom shell, a rectangular sealing ring is arranged between the display lamp panels and the bottom shell, and the sealing ring comprises a main ring and a plurality of auxiliary rings arranged on the inner side of the main ring. The auxiliary ring is arranged on the periphery of an edge connecting point between the display lamp panel and the bottom shell in a surrounding mode, a connecting strip is connected between the two sides of the long edge of the main ring, and an avoiding ring is arranged in the middle of the connecting strip and arranged on the periphery of a middle connecting point between the display lamp panel and the bottom shell in a surrounding mode. By arranging the sealing ring between the display lamp panel and the bottom shell for fixing the display lamp panel to the box body, the waterproof and dampproof effects are achieved, external dust is prevented from entering the display screen, and the display screen is suitable for outdoor waterproof and dustproof environments.

Description

Technical Field

[0001] The invention relates to the technical field of LED display, and in particular to a micro-pitch LED display screen. Background Art

[0002] LED display screens used in outdoor places are gradually developing towards small pitches in some application scenarios. They are used for close-range viewing (within 5 meters). The display screen is not large in size, but has higher clarity and resolution.

[0003] The LED display screen is composed of multiple display modules. The outdoor display module includes a box and an outdoor module installed on the surface of the box. The outdoor module is mainly composed of an outdoor bottom shell, a light board, and a mask.

[0004] The existing LED display screen with a small pitch does not have a protective structure, and the sealing of the LED display screen shell is not high, and it cannot achieve moisture-proof, waterproof, dust-proof, UV resistance, etc., which reduces the safety of the LED display screen and shortens the service life of the device. Summary of the invention

[0005] In order to overcome the deficiencies of the prior art, the present invention provides a micro-pitch LED display screen suitable for outdoor waterproof and dustproof environments.

[0006] The technical solution adopted by the present invention to solve its technical problem is:

[0007] A micro-pitch LED display screen comprises a box body, a bottom shell and a plurality of display light boards connected to the bottom shell, a rectangular sealing ring is arranged between the display light board and the bottom shell, the sealing ring comprises a main ring and a plurality of secondary rings arranged inside the main ring, the secondary rings are arranged around the periphery of the edge connection point between the display light board and the bottom shell, a connecting strip is connected between the two sides of the long side of the main ring, an avoidance circle is arranged in the middle of the connecting strip, and the avoidance circle is arranged around the periphery of the middle connection point between the display light board and the bottom shell.

[0008] As a further improvement of the above technical solution, the cross-sectional shapes of the main circle, the secondary circle and the avoidance circle are all convex-shaped structures, a fixing groove is provided on the bottom shell, the bottom of the convex-shaped structure is clamped in the fixing groove, and the head of the convex-shaped structure abuts against the display light board.

[0009] As a further improvement of the above technical solution, the sealing ring is made of secondary vulcanized heat-vulcanized silicone rubber.

[0010] As a further improvement of the above technical solution, the heat-vulcanized silicone rubber adopts methyl vinyl silicone rubber, wherein the content of methyl vinyl siloxane accounts for 0.3%, the hot pressing temperature of vulcanization is 190-200°C, and the vulcanization time is 7.75-8.25h.

[0011] As a further improvement of the above technical solution, the edge connection points are evenly spaced along the edge of the display light board, and the middle connection point is located in the middle of the display light board.

[0012] As a further improvement of the above technical solution, the edge connection point and the middle connection point both include a threaded seat arranged on the display light board, a threaded through hole arranged on the bottom shell, and a fixing screw. The fixing screw is passed through the threaded through hole and locked on the threaded seat to fix the display light board and the bottom shell.

[0013] As a further improvement of the above technical solution, the box body is provided with a central control box, and a gold finger is arranged on the central control box. The gold finger passes through the bottom shell and is connected to the display light board for transmitting power and signals; a side rubber ring is arranged on the periphery of the gold finger, and the side rubber ring is used to seal the gap between the gold finger and the bottom shell.

[0014] As a further improvement of the above technical solution, a coating layer is provided on the surface of the display light panel.

[0015] As a further improvement of the above technical solution, an epoxy resin layer is provided on the side of the display light board.

[0016] As a further improvement of the above technical solution, the coating layer and the epoxy resin layer both contain ultraviolet absorbers.

[0017] The beneficial effects of the present invention are:

[0018] The present invention realizes waterproofing and moisture-proofing and prevents external dust from entering by arranging a sealing ring between the display light board and the bottom shell that fixes it to the box body. The display screen is suitable for outdoor waterproof and dustproof environments. The internally enclosed component combination structure, as well as a coating layer and an epoxy resin layer containing an ultraviolet absorber to achieve weather resistance, enable different forms of LED display screens based on the display light board to be used for a long time in outdoor environments as a whole.

[0019] In addition, the sealing ring described in the present invention adopts secondary vulcanized heat-vulcanized silicone rubber raw material, and its low molecular compound content is reduced through a high-temperature oil pressure process to be made into a stable linear cross-sectional shape. It also uses multiple secondary ring structures to appropriately compress and distribute the strength of the main ring of the sealing ring while sealing around the connection point, so as to prevent the sealing ring from twisting and deforming after production, and achieve reliable sealing performance after assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0021] Figure 1This is a schematic diagram of assembling a micro-pitch LED display screen according to an embodiment of the present invention;

[0022] Figure 2 This is a structural disassembly diagram of a micro-pitch LED display screen after the box is hidden in an embodiment of the present invention;

[0023] Figure 3 This is a cross-sectional view of a micro-pitch LED display screen after the box is hidden in an embodiment of the present invention;

[0024] Figure 4 yes Figure 3 A is a partial enlarged schematic diagram;

[0025] Figure 5 is a schematic structural diagram of a sealing ring in an embodiment of the present invention;

[0026] Figure 6 Schematic diagram of anti-twisting deformation of the sealing ring in an embodiment of the present invention;

[0027] Figure 7 is a cross-sectional view of a sealing ring in an embodiment of the present invention;

[0028] Figure 8 is a schematic structural diagram of a bottom shell in an embodiment of the present invention;

[0029] Fig. 9 is a schematic diagram of the structure of a display light board in an embodiment of the present invention;

[0030] Fig.10 It is a schematic diagram of the installation structure of the box body and the bottom shell in an embodiment of the present invention.

[0031] Figure numerals: 1. box body; 2. bottom shell; 21. fixing groove; 22. threaded through hole; 23. fixing screw; 3. display light board; 31. threaded seat; 32. slot; 4. sealing ring; 401. bottom; 402. head; 41. main circle; 42. secondary circle; 43. connecting strip; 44. avoidance circle; 5. central control box; 51. gold finger; 52. side rubber ring. DETAILED DESCRIPTION

[0032] The following will be combined with the embodiments and drawings to clearly and completely describe the concept, specific structure and technical effects of the present invention, so as to fully understand the purpose, characteristics and effects of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, other embodiments obtained by technicians in this field without creative work belong to the scope of protection of the present invention. In addition, all the connection / connection relationships involved in the patent do not refer to the direct connection of components, but refer to the fact that a better connection structure can be formed by adding or reducing connection accessories according to the specific implementation situation. For example, fixed connection / fixed installation can be selected according to the needs of screw connection, bolt connection, pin connection, key connection, bonding, mortise and tenon connection, welding, riveting and other methods. For example, detachable connection can be selected according to the needs of screw connection, bolt connection, threaded connection, snap connection, mortise and tenon connection, Velcro connection and other methods. The various technical features in the invention can be combined interactively without conflicting with each other.

[0033] The embodiment of the present invention provides a micro-pitch LED display screen, referring to Figure 1-3 , Figure 8-10 The micro-pitch LED display screen includes a box body 1, a bottom shell 2, and a plurality of display light boards 3 connected to the bottom shell 2. The box body 1 has a central control box 5, and the central control box 5 is provided with a gold finger 51. The gold finger 51 penetrates the bottom shell 2 and is connected to the slot 32 on the display light board 3, which is used to transmit power and signals to realize the image display of the LED display screen. Furthermore, the outer periphery of the gold finger 51 is provided with a side rubber ring 52, which is used to seal the gap between the gold finger 51 and the bottom shell 2, and is used to waterproof and dustproof the physical channel for transmitting power and signals.

[0034] There are multiple connection points between the display light board 3 and the bottom shell 2, including edge connection points evenly spaced along the edge of the display light board 3, and a middle connection point located in the middle of the display light board 3. Specifically, the edge connection point and the middle connection point each include a threaded seat 31 provided on the display light board 3, a threaded through hole 22 provided on the bottom shell 2, and a fixing screw 23. The fixing screw 23 is passed through the threaded through hole 22 and locked to the threaded seat 31 to fix the display light board 3 on the bottom shell 2.

[0035] Reference Figure 2-Figure 7A rectangular sealing ring 4 is arranged between the display light board 3 and the bottom shell 2, and the sealing ring 4 includes a main ring 41 and a plurality of secondary rings 42 arranged inside the main ring 41, and the secondary ring 42 is arranged around the periphery of the edge connection point between the display light board 3 and the bottom shell 2 to seal the edge connection point to prevent water vapor and dust from entering the display light board 3 from the edge connection point, and a connecting strip 43 is connected between the two sides of the long side of the main ring 41, and an avoidance ring 44 is arranged in the middle of the connecting strip 43, and the avoidance ring 44 is arranged around the periphery of the middle connection point between the display light board 3 and the bottom shell 2 to seal the middle connection point to prevent water vapor and dust from entering the display light board 3 from the middle connection point.

[0036] In this embodiment, refer to Figure 3-Figure 5 , Figure 8 The linear cross-sectional shapes of the main circle 41, the secondary circle 42 and the avoidance circle 44 are all convex structures, and the convex structure includes a head 402 and a bottom 401 whose size is larger than the head 402. The head 402 of the convex structure abuts against the display light board 3, and a fixing groove 21 is provided on the bottom shell 2. The bottom 401 of the convex structure is snapped into the fixing groove 21 to increase the stability of the sealing ring 4 after installation.

[0037] It can be understood that, along the linear length direction of the sealing ring 4, since a number of edge connection points with similar spacing are used to fix the lamp board and the bottom shell 2, the sealing ring 4 is compressed in a balanced manner when installed to achieve a uniform sealing effect.

[0038] In addition, refer to Figure 6 The fixing screw 23 is surrounded by an inner ring with the same linear cross-section for sealing. This arrangement allows the sealing ring 4 to have an internal claw structure. Usually, an elastic rubber ring with a linear cross-section will roll inward when the temperature is reduced from the thermal state of the mold production process to room temperature. The inner ring can improve the stability of the sealing ring 4, thereby effectively solving the problem of its distortion and deformation.

[0039] In this embodiment, the sealing ring 4 is an elastic rubber ring. Specifically, the sealing ring 4 is made of secondary vulcanized heat-vulcanized silicone rubber, wherein the heat-vulcanized silicone rubber is methyl vinyl silicone rubber, and the methyl vinyl siloxane content accounts for 0.3%. During production, the vulcanization hot pressing temperature is 190-200°C, and the vulcanization time is 7.75-8.25h. The high-temperature oil pressure process is used to reduce the content of low molecular weight compounds to make an elastic rubber ring with a stable linear cross-sectional shape.

[0040] In this embodiment, the surface of the display light board 3 is provided with a coating layer for protecting the lamp tube and external protection from water and dust, etc. At the same time, a consistent surface treatment process is applied, which can not only cover the color difference caused by the PCB material itself, but also enhance the blackness of the background color, thereby improving the display contrast and achieving a better overall LED screen display effect.

[0041] In this embodiment, an epoxy resin layer is provided on the side of the display light board 3. Specifically, the PCB is first processed to make it smaller than the finished product size, and then the epoxy resin is cured on the four sides of the PCB using a sealing process, and then the finished product size is accurately processed. A layer of protective film (i.e., epoxy resin layer) is maintained around the finished PCB to meet the requirements of waterproof and dustproof properties.

[0042] In the above embodiment, the coating layer and the epoxy resin layer of the display light board 3 both contain ultraviolet absorbers to resist the aging effect of outdoor sunlight on the product surface, thereby increasing the service life of the LED display screen.

[0043] The above is a specific description of the preferred implementation of the present invention, but the invention is not limited to the embodiments. Those skilled in the art can make various equivalent modifications or substitutions without violating the spirit of the present invention. These equivalent modifications or substitutions are all included in the scope defined by the claims of this application.

Claims

1. A micro-pitch LED display, characterized by: It includes a box body, a bottom shell and multiple display light boards connected to the bottom shell, a rectangular sealing ring is arranged between the display light board and the bottom shell, the sealing ring includes a main ring and multiple secondary rings arranged on the inner side of the main ring, the secondary rings are arranged around the outer periphery of the edge connection point between the display light board and the bottom shell, a connecting strip is connected between the two sides of the long side of the main ring, an avoidance circle is arranged in the middle of the connecting strip, and the avoidance circle is arranged around the outer periphery of the middle connection point between the display light board and the bottom shell.

2. A micro-pitch LED display according to claim 1, characterized in that: The cross-sectional shapes of the main circle, the secondary circle and the avoidance circle are all convex structures, a fixing groove is provided on the bottom shell, the bottom of the convex structure is clamped in the fixing groove, and the head of the convex structure is in contact with the display light board.

3. The micro-pitch LED display according to claim 1, characterized in that: The sealing ring is made of secondary vulcanized heat-vulcanized silicone rubber.

4. A micro-pitch LED display according to claim 3, characterized in that: The heat-vulcanized silicone rubber is methyl vinyl silicone rubber, wherein the content of methyl vinyl siloxane accounts for 0.3%, the hot pressing temperature of vulcanization is 190-200° C., and the vulcanization time is 7.75-8.25 hours.

5. The micro-pitch LED display according to claim 1, characterized in that: The edge connection points are evenly spaced along the edge of the display light board, and the middle connection point is located in the middle of the display light board.

6. A micro-pitch LED display screen according to claim 5, characterized in that: The edge connection point and the middle connection point both include a threaded seat arranged on the display light board, a threaded through hole arranged on the bottom shell, and a fixing screw. The fixing screw passes through the threaded through hole and is locked on the threaded seat to fix the display light board and the bottom shell.

7. The micro-pitch LED display screen according to claim 1, characterized in that: The box body is provided with a central control box, on which a gold finger is arranged. The gold finger passes through the bottom shell and is connected with the display light board for transmitting power and signals. A side rubber ring is arranged on the periphery of the gold finger for sealing the gap between the gold finger and the bottom shell.

8. The micro-pitch LED display screen according to claim 1, characterized in that: An epoxy resin layer is arranged on the side surface of the display light panel.

9. A micro-pitch LED display screen according to claim 8, characterized in that: The surface of the display light panel is provided with a coating layer.

10. The micro-pitch LED display screen according to claim 9, characterized in that: The coating layer and the epoxy resin layer both contain an ultraviolet absorber.

Images