Micro-pitch LED display screen

Abstract

The application discloses a micro-pitch 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 panel and the bottom shell, the sealing ring comprises a main ring and a plurality of sub-rings arranged on the inner side of the main ring, the sub-rings are arranged on the outer periphery of the edge connecting point between the display lamp panel and the bottom shell, a connecting strip is connected between the long sides of the main ring, an avoiding ring is arranged in the middle of the connecting strip, and the avoiding ring is arranged on the outer periphery of the middle connecting point between the display lamp panel and the bottom shell.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of LED display, in particular to a micro-pitch LED display. BACKGROUND

[0002] The LED display screen used in outdoor places gradually develops towards micro-pitch in some application scenarios, which is used for close-range (within 5 meters) viewing, and has higher definition and larger resolution.

[0003] The LED display screen is composed of multiple display modules, and the outdoor display module includes a box body and an outdoor module mounted on the surface of the box body.

[0004] The existing micro-pitch LED display screen does not have a protection structure, the sealing performance of the LED display screen housing is not high, and it cannot achieve moisture-proof, waterproof, dust-proof, UV-resistant, etc., which reduces the safety of the LED display screen, thereby shortening the service life of the device. SUMMARY

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

[0006] The technical scheme adopted by the present application to solve its technical problems is:

[0007] A micro-pitch LED display screen, comprising 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 panel and the bottom shell, the sealing ring comprises a main ring and a plurality of sub-rings arranged inside the main ring, the sub-rings are arranged around the outer periphery of the edge connection point between the display lamp panel and the bottom shell, a connecting strip is connected between the long sides of the main ring, an avoidance ring is arranged in the middle of the connecting strip, and the avoidance ring is arranged around the outer periphery of the middle connection point between the display lamp panel and the bottom shell.

[0008] As a further improvement of the above technical scheme, the cross-sectional shape of the main ring, the sub-ring and the avoidance ring is a convex structure, a fixing groove is arranged on the bottom shell, the bottom of the convex structure is clamped in the fixing groove, and the head of the convex structure abuts against the display lamp panel.

[0009] As a further improvement of the above technical scheme, the sealing ring is made of twice-vulcanized hot vulcanized silicone rubber.

[0010] As a further improvement of the above technical scheme, the hot vulcanized silicone rubber is made of methyl vinyl silicone rubber, the content of methyl vinyl silicone is 0.3%, the hot pressing temperature of vulcanization is 190-200 DEG C, and the vulcanization time is 7.75-8.25 h.

[0011] As a further improvement of the above technical solution, the edge connecting points are arranged at equal intervals along the edge of the display lamp panel, and the middle connecting point is located at the middle position of the display lamp panel.

[0012] As a further improvement of the above technical solution, the edge connecting point and middle connecting point each include a threaded seat arranged on the display lamp panel, a threaded through hole arranged on the bottom shell, and a fixing screw, the fixing screw is arranged through the threaded through hole and locked to the threaded seat to fix the display lamp panel and the bottom shell.

[0013] As a further improvement of the above technical solution, the box has a central control box, the central control box is provided with a gold finger, the gold finger penetrates the bottom shell and is connected with the display lamp panel for transmitting power supply and signals, and the outer periphery of the gold finger is provided with a side rubber ring for sealing the gap between the gold finger and the bottom shell.

[0014] As a further improvement of the above technical solution, the surface of the display lamp panel is provided with a film layer.

[0015] As a further improvement of the above technical solution, the side surface of the display lamp panel is provided with an epoxy resin layer.

[0016] As a further improvement of the above technical solution, the film layer and the epoxy resin layer each contain an ultraviolet absorber.

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

[0018] The present application realizes waterproof, moisture-proof and prevents external dust from entering by arranging a sealing ring between the display lamp panel and the bottom shell fixed to the box, is suitable for a display screen in an outdoor waterproof and dustproof environment, and through an internal closed component combination structure and a film layer and an epoxy resin layer containing an ultraviolet absorber realizing weather resistance, the overall LED display screen based on the display lamp panel can be used in an outdoor environment for a long time.

[0019] In addition, the sealing ring in the present application adopts a hot vulcanized type silicone rubber raw material for secondary vulcanization, reduces the content of low molecular compounds through a high temperature oil pressure process, is made into a stable linear cross section shape, and through a plurality of sub-ring structures, in order to seal around the connecting point, moderately compresses the strength of the main ring of the sealing ring, so as to prevent the sealing ring from being distorted after production, and achieves reliable sealing performance after assembly. BRIEF DESCRIPTION OF DRAWINGS

[0020] The present application will be further described below in combination with the drawings and examples.

[0021] Figure 1is an assembly schematic diagram of a micro-pitch LED display screen in the embodiment of the present application;

[0022] Figure 2 is a structure split diagram of the micro-pitch LED display screen after hiding the box in the embodiment of the present application;

[0023] Figure 3 is a sectional view of the micro-pitch LED display screen after hiding the box in the embodiment of the present application;

[0024] Figure 4 is Figure 3 is a local enlarged schematic diagram of A in the middle;

[0025] Figure 5 is a structure schematic diagram of the sealing ring in the embodiment of the present application;

[0026] Figure 6 is a anti-twist deformation schematic diagram of the sealing ring in the embodiment of the present application;

[0027] Figure 7 is a sectional view of the sealing ring in the embodiment of the present application;

[0028] Figure 8 is a structure schematic diagram of the bottom shell in the embodiment of the present application;

[0029] Figure 9 is a structure schematic diagram of the display lamp plate in the embodiment of the present application;

[0030] Figure 10 is a mounting structure schematic diagram of the box and the bottom shell in the embodiment of the present application.

[0031] Reference signs: 1, box; 2, bottom shell; 21, fixing groove; 22, threaded through hole; 23, fixing screw; 3, display lamp plate; 31, threaded seat; 32, insertion slot; 4, sealing ring; 401, bottom; 402, head; 41, main ring; 42, auxiliary ring; 43, connecting strip; 44, avoiding ring; 5, central control box; 51, golden finger; 52, side rubber ring. DETAILED DESCRIPTION

[0032] The concept, specific structure and generated technical effects of the present application will be clearly and completely described below in combination with embodiments and drawings, so as to fully understand the purposes, features and effects of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all the embodiments, and other embodiments obtained by those skilled in the art based on the embodiments of the present application without creative labor are within the protection scope of the present application. In addition, all the coupling / connection relations involved in the patent do not mean that the components are directly connected, but that a better coupling structure can be composed by adding or reducing coupling accessories according to the specific implementation situation, such as fixed connection / fixed installation which can be selected according to the needs screw connection, bolt connection, pin connection, key connection, adhesion, mortise and tenon connection, welding, riveting and the like, and detachable connection which can be selected according to the needs screw connection, bolt connection, threaded connection, buckle connection, mortise and tenon connection, magic tape connection and the like. The technical features in the present application can be combined with each other without conflict.

[0033] The embodiment of the present application provides a micro-pitch LED display screen, referring to Figures 1-3 、 Figures 8-10 The micro-pitch LED display screen comprises a box body 1, a bottom shell 2 and a plurality of display lamp panels 3 connected to the bottom shell 2, the box body 1 is provided with a control box 5, the control box 5 is provided with a golden finger 51, the golden finger 51 penetrates through the bottom shell 2 and is connected with the slot 32 on the display lamp panel 3, for transmitting power and signal, realizing image display of the LED display screen. Further, the outer periphery of the golden finger 51 is provided with a side rubber ring 52, the side rubber ring 52 is used for sealing the gap between the golden finger 51 and the bottom shell 2, and the physical channel for transmitting power and signal is waterproof and dustproof.

[0034] The display lamp panel 3 and the bottom shell 2 have a plurality of connection points, the connection points include edge connection points which are uniformly arranged along the edges of the display lamp panel 3, and middle connection points which are located at the middle positions of the display lamp panel 3, specifically, the edge connection points and the middle connection points each include a threaded seat 31 arranged on the display lamp panel 3, a threaded through hole 22 arranged on the bottom shell 2 and a fixing screw 23, the fixing screw 23 is arranged in the threaded through hole 22 and locked in the threaded seat 31, so as to fix and install the display lamp panel 3 on the bottom shell 2.

[0035] Referring to Figures 2-7The display lamp panel 3 and the bottom shell 2 are provided with a rectangular sealing ring 4, the sealing ring 4 comprises a main ring 41 and a plurality of sub-rings 42 arranged inside the main ring 41, the sub-rings 42 are arranged around the outer periphery of the edge connecting point between the display lamp panel 3 and the bottom shell 2 to seal the edge connecting point, so as to prevent water vapor and dust from entering the display lamp panel 3 through the edge connecting point, the long sides of the main ring 41 are connected with a connecting strip 43, the middle part of the connecting strip 43 is provided with a avoiding ring 44, the avoiding ring 44 is arranged around the outer periphery of the middle connecting point between the display lamp panel 3 and the bottom shell 2 to seal the middle connecting point, so as to prevent water vapor and dust from entering the display lamp panel 3 through the middle connecting point.

[0036] In the embodiment, referring to Figures 3-5 , Figure 8 The linear cross-sectional shape of the main ring 41, the sub-ring 42 and the avoiding ring 44 is a convex structure, the convex structure comprises a head part 402 and a bottom part 401 with a larger size than the head part 402, the head part 402 of the convex structure abuts against the display lamp panel 3, the bottom shell 2 is provided with a fixing groove 21, and the bottom part 401 of the convex structure is clamped in 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, the edge connecting point with a similar interval is used to fix the lamp panel and the bottom shell 2, so that the sealing ring 4 is balancedly compressed during installation, and uniform sealing effect is achieved.

[0038] In addition, referring to Figure 6 The circumferential ring of the fixing screw 23 is provided with an inner ring with the same linear cross section for sealing, and the arrangement mode makes the sealing ring 4 as a whole have a shape with a claw structure inside, and the elastic rubber ring with a linear cross section usually has internal convolution when the temperature is reduced from the hot state in the mold production process to the normal temperature, and the stability of the sealing ring 4 is improved by the arrangement of the inner ring, so that the distortion of the sealing ring 4 is effectively solved.

[0039] In the embodiment, the sealing ring 4 is an elastic rubber ring, specifically, the sealing ring 4 is made of a hot vulcanized type silicone rubber after secondary vulcanization, wherein the hot vulcanized type silicone rubber is a methyl vinyl silicone rubber, and the content of methyl vinyl silicone is 0.3%, the hot pressing temperature of vulcanization is 190-200°C, the vulcanization time is 7.75-8.25h, and the low molecular compound content is reduced through a high-temperature oil pressure process to make the elastic rubber ring with a stable linear cross-sectional shape.

[0040] In the embodiment, the surface of the display lamp panel 3 is provided with a film layer for protecting the lamp tube and preventing water and dust; meanwhile, a consistent surface treatment process is applied, which can not only cover the color difference of the incoming PC material, but also enhance the blackness of the background color, so that the display contrast is improved and the overall screen display effect of the LED is better.

[0041] In the embodiment, the side of the display lamp panel 3 is provided with an epoxy resin layer, specifically, the PCB is first processed to have a size smaller than the finished product size, then the epoxy resin is solidified around the four sides of the PCB using a sealing process, and then the finished product size is accurately processed, so that the four sides of the finished product PCB keep a layer of protective film (i.e. the epoxy resin layer) for meeting the performance of waterproof and dustproof.

[0042] In the above embodiment, the film layer and the epoxy resin layer of the display lamp panel 3 both contain ultraviolet absorbers for resisting the aging effect of sunlight on the surface of the product in outdoor environment, so as to improve the service life of the LED display screen.

[0043] The above is a specific description of the preferred embodiment of the present application, but the present application is not limited to the above-mentioned embodiments, and those skilled in the art can make various equivalent modifications or replacements without departing from the spirit of the present application, and these equivalent modifications or replacements are all included in the scope defined by the claims of the present application.

Claims

1. A micro-pitch LED display screen, characterized in that: The utility model provides a box, bottom shell and connect in bottom shell a plurality of display lamp board, display lamp board with bottom shell between setting up rectangular seal ring, seal ring includes main ring and sets up in the plurality of vice ring of main ring inboard, vice ring surrounds the edge connecting point between display lamp board and bottom shell and the circumference of outside, the long side of main ring both sides is connected with the connecting strip, the middle part of connecting strip is provided with the avoidance ring, the avoidance ring surrounds the circumference of middle connecting point between display lamp board and bottom shell and the outside. 2.The micro-pitch LED display screen of claim 1, wherein: The cross-sectional shape of the main ring, vice ring and avoidance ring is all convex structure, the bottom shell is provided with fixed groove, the head of convex structure is abutted with display lamp board. 3.The micro-pitch LED display screen of claim 1, wherein: The seal ring is made of hot vulcanized silicone rubber.

4. The micro-pitch LED display screen of claim 3, wherein: The hot vulcanized silicone rubber is made of methyl vinyl silicone rubber, the content of methyl vinyl silicone is 0.3%, the hot pressing temperature of vulcanization is 190-200℃, and the vulcanization time is 7.75-8.25h.

5. The micro-pitch LED display screen of claim 1, wherein: The edge connecting points are evenly distributed along the edges of the display lamp board, and the middle connecting points are located at the middle positions of the display lamp board.

6. The micro-pitch LED display screen of claim 5, wherein: The edge connecting points and middle connecting points both include a threaded seat arranged on the display lamp board, a threaded through hole arranged on the bottom shell, and a fixing screw, the fixing screw is arranged in the threaded through hole and locked in the threaded seat to fix the display lamp board and the bottom shell.

7. The micro-pitch LED display screen of claim 1, wherein: The box has a central control box, the central control box is provided with a gold finger, the gold finger is connected with the display lamp board through the bottom shell, and is used for transmitting power and signal; the outer periphery of the gold finger is provided with a side rubber ring, and the side rubber ring is used for sealing the gap between the gold finger and the bottom shell. 8.The micro-pitch LED display screen of claim 1, wherein: The side of the display lamp board is provided with an epoxy resin layer.

9. The micro-pitch LED display screen of claim 8, wherein: The surface of the display lamp board is provided with a film layer.

10. The micro-pitch LED display screen of claim 9, wherein: The film layer and the epoxy resin layer both contain ultraviolet absorbers.

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