LED display module and LED display device with same

Abstract

The utility model provides an LED display module and an LED display device with the same, and the LED display module comprises a lamp panel which comprises a panel body, a lamp bead arranged at the front side of the panel body, and an electronic device arranged at the rear side of the panel body; the sealing glue layer is arranged on the rear side of the board body and covers the electronic device; the rear cover is arranged on the rear side of the lamp panel in a covering mode, the rear cover and the lamp panel are arranged in a spaced mode and form a glue injection space, a glue injection hole and an exhaust hole are formed in the rear cover, and the glue injection hole and the exhaust hole both communicate with the glue injection space; the covering piece is arranged on the rear cover and covers the glue injection hole; and the blocking piece is arranged on the rear cover and blocks the exhaust hole. According to the technical scheme, the problem that in the prior art, an adhesive layer cannot completely cover the back face of the lamp panel can be effectively solved.

Description

Technical Field

[0001] This utility model relates to the field of LED display technology, and more specifically, to an LED display module and an LED display device having the same. Background Technology

[0002] In related technologies, LED display devices used outdoors need to be waterproofed, for example, by setting up sealing rings, waterproof adhesive layers, and other structures.

[0003] The waterproof adhesive layer is mainly applied to the front and back of the lamp board to protect the LEDs on the front and the control ICs and other components on the back. The adhesive layer on the back of the lamp board is applied by injecting adhesive through injection holes in the back cover. However, when using existing processes to form the waterproof adhesive layer on the back of the lamp board, there is a possibility that the adhesive layer cannot completely cover the back of the lamp board. Utility Model Content

[0004] The main objective of this invention is to provide an LED display module and an LED display device having the same, in order to solve the problem in related technologies that the adhesive layer cannot completely cover the back of the lamp panel.

[0005] To achieve the above objectives, according to one aspect of this utility model, an LED display module is provided, comprising: a lamp board, including a board body, LED beads disposed on the front side of the board body, and electronic components disposed on the rear side of the board body; a sealant layer disposed on the rear side of the board body and covering the electronic components; a rear cover disposed on the rear side of the lamp board, the rear cover and the lamp board being spaced apart to form an injection space, the rear cover being provided with an injection hole and an vent hole, both of which are connected to the injection space; a cover member disposed on the rear cover and covering the injection hole; and a sealing member disposed on the rear cover and sealing the vent hole.

[0006] Furthermore, the cover includes a first cover plate and a waterproof and breathable membrane disposed on the front side of the first cover plate, the first cover plate having vents corresponding to the waterproof and breathable membrane.

[0007] Furthermore, a mounting groove communicating with an injection hole is provided on the rear surface of the rear cover, and a first cover plate is disposed in the mounting groove, with the rear surface of the first cover plate being flush with or lower than the rear surface of the rear cover; and / or, the first cover plate is bonded to the rear cover.

[0008] Furthermore, there are multiple injection holes and vent holes spaced apart along the length of the back cover, with each injection hole and vent hole corresponding to the other. The injection holes are located inside the vent holes along the width of the back cover.

[0009] Furthermore, the vent is located near the edge of the back cover, and the distance between the center of the vent and the edge of the back cover is greater than or equal to 10 mm and less than or equal to 30 mm.

[0010] Furthermore, a connector is provided on the rear side of the plate, and a clearance hole is provided on the rear cover for the connector to extend out.

[0011] Furthermore, a baffle plate is provided on the front surface of the rear cover, which surrounds the outer periphery of the clearance hole and abuts against the rear surface of the plate.

[0012] Furthermore, the sealing element is inserted through the vent hole.

[0013] Furthermore, the LED display module also includes a second cover plate and a third cover plate disposed on the rear side of the rear cover. The second cover plate and the third cover plate are disposed opposite each other in the length direction or width direction of the rear cover. A leveling groove is formed between the second cover plate and the rear cover. The LED display module also includes a leveling component disposed between the rear cover and the third cover plate. The leveling component is adapted to the leveling groove. The second cover plate and the third cover plate are respectively fixed to the rear cover by at least one sealing component.

[0014] According to another aspect of the present invention, an LED display device is provided, including an LED display module, wherein the LED display module is the aforementioned LED display module.

[0015] The present invention provides a back cover with an injection hole and a vent. The injection hole allows the injection head of the injection tool to inject liquid sealant into the injection space during the manufacturing of the LED display module. After the liquid sealant solidifies, a sealant layer is formed to protect the electronic components located on the back of the board. The vent allows air to escape from the injection space during the injection of liquid sealant, preventing air from being trapped and obstructing the flow of liquid sealant to the edges of the board. This ensures that the liquid sealant covers the entire back surface of the board, guaranteeing the protective effect of the final sealant layer on the LED board. After the liquid sealant injection is completed, a cover is used to cover the injection hole, and a sealing member is used to seal the vent. This prevents rainwater from entering the LED display module through the injection hole and vent during subsequent use, further improving the waterproof capability of the LED display module. Therefore, the technical solution of this application effectively solves the problem in related technologies where the sealant layer cannot completely cover the back of the LED board. Attached Figure Description

[0016] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings:

[0017] Figure 1 A perspective structural schematic diagram of an embodiment of the LED display module according to the present invention is shown;

[0018] Figure 2 It shows Figure 1 A three-dimensional structural diagram of the LED display module from another angle;

[0019] Figure 3 It shows Figure 1 A three-dimensional structural diagram of a portion of an LED display module;

[0020] Figure 4 It shows Figure 3 A magnified view of point A on the LED display module;

[0021] Figure 5 It shows Figure 3 A magnified view of point B on the LED display module;

[0022] Figure 6 It shows Figure 1 A cross-sectional schematic diagram of an LED display module;

[0023] Figure 7 It shows Figure 6 A magnified view of point C of the LED display module;

[0024] Figure 8 It shows Figure 6 A magnified view of point D of the LED display module;

[0025] Figure 9 It shows Figure 1 A cross-sectional view of the connector of the LED display module;

[0026] Figure 10 It shows Figure 1 A cross-sectional view of the cover of the LED display module;

[0027] Figure 11 It shows Figure 1 A three-dimensional structural diagram of part of the back cover of the LED display module;

[0028] Figure 12 A perspective structural schematic diagram of an embodiment of the LED display device according to the present invention is shown.

[0029] The above figures include the following reference numerals:

[0030] 100. Glue injection space; 200. Leveling groove;

[0031] 10. Light panel; 11. Panel body; 12. Connector;

[0032] 20. Rear cover; 21. Injection hole; 22. Vent hole; 23. Mounting groove; 24. Clearance hole; 25. Glue-blocking plate; 26. Mounting recess;

[0033] 30. Covering component; 31. First cover plate; 311. Ventilation hole; 32. Waterproof and breathable membrane;

[0034] 40. Sealing components;

[0035] 51. Second cover plate; 52. Third cover plate; 53. Fourth cover plate;

[0036] 60. Leveling components;

[0037] 70. Support frame. Detailed Implementation

[0038] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present utility model or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0039] like Figures 1 to 5 As shown, this application provides an LED display device. An embodiment of the LED display device includes a lamp board 10, a sealant layer, a back cover 20, a cover member 30, and a sealing member 40. The lamp board 10 includes a board body 11, LED beads disposed on the front side of the board body 11, and electronic components disposed on the rear side of the board body 11. The sealant layer is disposed on the rear side of the board body 11 and covers the electronic components. The back cover 20 is disposed on the rear side of the lamp board 10, and the back cover 20 and the lamp board 10 are spaced apart to form a glue injection space 100. The back cover 20 has a glue injection hole 21 and a vent hole 22, both of which communicate with the glue injection space 100. The cover member 30 is disposed on the back cover 20 and covers the glue injection hole 21. The sealing member 40 is disposed on the back cover 20 and seals the vent hole 22.

[0040] Applying the technical solution of this embodiment, the rear cover 20 is provided with an injection hole 21 and an exhaust hole 22. The injection hole 21 is used for the injection head of the injection tool to be inserted into the injection space 100 to inject liquid sealant during the manufacturing of the LED display module. After the liquid sealant solidifies, a sealant layer is formed to protect the electronic devices (including control ICs, etc.) located on the rear side of the board 11. The exhaust hole 22 is used to expel the air in the injection space 100 during the injection of liquid sealant, to prevent air from being trapped in the injection space 100 and blocking the liquid sealant from flowing to the edge of the board 11 and other positions, thereby ensuring that the liquid sealant can cover the rear surface of the board 11 and ensuring the protective effect of the final sealant layer on the lamp board 10. After the liquid sealant is applied, a cover 30 is used to cover the injection hole 21, and a sealing member 40 is used to seal the vent hole 22. This prevents rainwater from entering the LED display module through the injection hole 21 and vent hole 22 during subsequent use, further improving the LED display module's waterproof capability. Therefore, the technical solution of this embodiment can effectively solve the problem in related technologies where the adhesive layer cannot completely cover the back of the lamp board.

[0041] like Figure 2 and Figure 10 As shown, the cover 30 includes a first cover plate 31 and a waterproof and breathable membrane 32 disposed on the front side of the first cover plate 31. The first cover plate 31 has vent holes 311 corresponding to the waterproof and breathable membrane 32. The waterproof and breathable membrane 32 is a membrane structure that allows gas to pass through while preventing water from passing through. During subsequent use, the first cover plate 31 and the waterproof and breathable membrane 32 can prevent external water from entering the interior of the LED display module through the glue injection hole 21; simultaneously, the waterproof and breathable membrane 32 and the vent holes 311 can expel the air that expands after the LED display module heats up, preventing the lamp board 10 from bulging locally due to the expansion of air, thus ensuring the display effect.

[0042] like Figure 2 and Figure 10 As shown, a mounting groove 23 communicating with the glue injection hole 21 is provided on the rear surface of the rear cover 20. The first cover plate 31 is disposed in the mounting groove 23, and the rear surface of the first cover plate 31 is flush with or lower than the rear surface of the rear cover 20. The fact that the rear surface of the first cover plate 31 is flush with or lower than the rear surface of the rear cover 20 makes it less likely for the cover member 30 to fall off due to external impact during the use of the LED display module, thus ensuring the shielding effect.

[0043] Specifically, such as Figure 10 As shown, in this embodiment, the waterproof and breathable membrane 32 is bonded to the front side of the first cover plate 31 and covers the vent holes 311. The first cover plate 31 is bonded to the rear cover 20.

[0044] like Figure 2 and Figure 3 As shown, multiple injection holes 21 and vent holes 22 are spaced apart along the length of the rear cover 20. The injection holes 21 and vent holes 22 are arranged in a one-to-one correspondence, with the injection holes 21 located inside the vent holes 22 along the width of the rear cover 20. The multiple injection holes 21 and vent holes 22 improve the injection efficiency during the LED display module manufacturing process. The injection holes 21 are positioned close to the inner side of the rear cover 20, allowing the liquid sealant to be evenly and quickly distributed across the rear side of the board 11. At this point, the edge of the rear cover 20 represents the furthest point of the liquid sealant's flow path. The vent holes 22 are positioned close to the outer side of the rear cover 20, ensuring that the liquid sealant can flow to the edge of the board 11.

[0045] like Figure 1 As shown, the plate 11 and the back cover 20 are rectangular or square structures. Specifically, in this embodiment, the width direction of the plate 11 / back cover 20 refers to... Figure 1 The vertical direction in the text, and the length direction of plate 11 / back cover 20 refer to... Figure 1 The horizontal direction within. When the light panel and back cover are square structures, the extension direction of one side is the length direction, and the extension direction of the side adjacent to that side is the width direction.

[0046] like Figure 2 and Figure 3 As shown, the vent 22 is located near the edge of the back cover 20, and the distance between the center of the vent 22 and the edge of the back cover 20 is greater than or equal to 10 mm and less than or equal to 30 mm. Since the lamp panel 10 and the back cover 20 need to be flipped during the flow of the liquid sealant, the distance between the center of the vent 22 and the edge of the back cover 20 is within the aforementioned range. This ensures that the liquid sealant can flow sufficiently to cover the entire panel 11, while preventing the liquid sealant from flowing out of the vent 22 during the flipping of the lamp panel 10 and the back cover 20. Preferably, the aforementioned distance can be 10 mm, 15 mm, 20 mm, 25 mm, or 30 mm.

[0047] like Figure 2 , Figure 3 and Figure 9 As shown, a connector 12 is provided on the rear side of the board 11, and a clearance hole 24 is provided on the rear cover 20 for the connector 12 to extend out. The connector 12 can be plugged into the connector on the control box to enable power supply and control signal transmission to the LED display module.

[0048] like Figure 2 , Figure 3 , Figure 9 and Figure 11As shown, a sealant baffle 25 is provided on the front surface of the rear cover 20. The sealant baffle 25 surrounds the outer periphery of the clearance hole 24 and abuts against the rear surface of the plate 11. The sealant baffle 25 surrounds the outer periphery of the connector 12. When the sealant layer is injected, the liquid sealant will be blocked by the sealant baffle 25 and cannot approach the connector 12, thus preventing the liquid sealant from climbing up the pin of the connector 12 and adhering to the pin, thereby affecting the conductivity of the connector 12.

[0049] like Figure 5 As shown, the sealing element 40 passes through the vent hole 22. This arrangement ensures the sealing effect on the vent hole 22.

[0050] like Figures 2 to 8 As shown, the LED display module also includes a second cover plate 51 and a third cover plate 52 disposed on the rear side of the rear cover 20. The second cover plate 51 and the third cover plate 52 are disposed opposite each other in the length or width direction of the rear cover 20, and a leveling groove 200 is formed between the second cover plate 51 and the rear cover 20. The LED display module also includes a leveling member 60 disposed between the rear cover 20 and the third cover plate 52. The leveling member 60 is adapted to the leveling groove 200. The second cover plate 51 and the third cover plate 52 are respectively fixed to the rear cover 20 by at least one sealing member 40. Specifically, the leveling member 60 is rotatably disposed on the rear cover 20 and has a plug-in end. The leveling member 60 rotates to switch between a leveling position and a retracted position. When the leveling member 60 is in the leveling position, the plug-in end is inserted into the leveling groove 200 of the adjacent LED display module; when the leveling member 60 is in the retracted position, the plug-in end is hidden between the third cover plate 52 and the rear cover 20. The second cover plate 51 and the third cover plate 52 can shield part of the structure of the leveling groove 200 and the leveling component 60, ensuring the overall appearance of the LED display module. The sealing component 40 is a connecting screw, with multiple connecting screws passing through the second cover plate 51 and the vent hole 22, as well as through the third cover plate 52 and the vent hole 22, to seal the vent hole 22 and connect the second cover plate 51 and the third cover plate 52 to the rear cover 20. The rear cover 20 is provided with a mounting recess 26 for accommodating the leveling component 60.

[0051] like Figure 1 and Figure 2As shown, the rear cover 20 includes multiple sub-covers, which are spaced apart and connected by flexible connectors, allowing adjacent sub-covers to be bent, thus enabling the LED display module to be used in a curved display screen. To achieve leveling of two adjacent LED display modules, only one pair of leveling components 60 and leveling grooves 200 are needed. To reduce the number of molds, the sub-covers with and without leveling components 60 and leveling grooves 200 are made using the same mold. The sub-covers without leveling components 60 and leveling grooves 200 also have mounting recesses 26 and recessed structures for forming the leveling grooves 200. A fourth cover plate 53 can be provided at these locations to cover the mounting recesses 26 and recessed structures.

[0052] like Figure 12 As shown, this application also provides an LED display device. An embodiment of the LED display device of this application includes an LED display module, wherein the LED display module is the aforementioned LED display module. The aforementioned LED display module can effectively solve the problem in related technologies where the adhesive layer cannot completely cover the back of the lamp board, and the LED display device having the aforementioned LED display module also has the aforementioned advantages.

[0053] like Figure 12 As shown, the LED display device in this embodiment is an LED display cabinet, which includes a support frame 70 and multiple LED display modules disposed on the front side of the support frame 70. A single LED display cabinet can be used as an LED display screen, and multiple LED display cabinets can also be spliced ​​together to form a larger LED display screen.

[0054] In the description of this utility model, it should be understood that the directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this utility model. The directional terms "inner" and "outer" refer to the inner and outer contours of each component itself.

[0055] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be construed as limiting the scope of protection of this utility model.

[0056] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. An LED display module, characterized in that, include: The lamp board (10) includes a board body (11), lamp beads disposed on the front side of the board body (11), and electronic devices disposed on the rear side of the board body (11). A sealant layer is disposed on the rear side of the plate (11) and covers the electronic components; A rear cover (20) is provided on the rear side of the lamp panel (10). The rear cover (20) and the lamp panel (10) are spaced apart and form an injection space (100). The rear cover (20) is provided with an injection hole (21) and an exhaust hole (22). The injection hole (21) and the exhaust hole (22) are both connected to the injection space (100). A cover (30) is provided on the rear cover (20) and covers the glue injection hole (21); A sealing element (40) is disposed on the rear cover (20) and blocks the vent (22).

2. The LED display module according to claim 1, characterized in that, The cover (30) includes a first cover plate (31) and a waterproof and breathable membrane (32) disposed on the front side of the first cover plate (31), wherein the first cover plate (31) has a vent (311) corresponding to the waterproof and breathable membrane (32).

3. The LED display module according to claim 2, characterized in that, The rear surface of the rear cover (20) is provided with a mounting groove (23) communicating with the glue injection hole (21), and the first cover plate (31) is disposed in the mounting groove (23). The rear surface of the first cover plate (31) is flush with or lower than the rear surface of the rear cover (20); and / or, The first cover plate (31) is bonded to the rear cover (20).

4. The LED display module according to any one of claims 1 to 3, characterized in that, The glue injection hole (21) and the vent hole (22) are both multiple holes spaced apart along the length of the back cover (20). The multiple glue injection holes (21) and the multiple vent holes (22) are arranged in a one-to-one correspondence. The glue injection hole (21) is located inside the vent hole (22) along the width of the back cover (20).

5. The LED display module according to any one of claims 1 to 3, characterized in that, The vent (22) is located near the edge of the rear cover (20), and the distance between the center of the vent (22) and the edge of the rear cover (20) is greater than or equal to 10 mm and less than or equal to 30 mm.

6. The LED display module according to any one of claims 1 to 3, characterized in that, A connector (12) is provided on the rear side of the plate (11), and a clearance hole (24) is provided on the rear cover (20) for the connector (12) to extend out.

7. The LED display module according to claim 6, characterized in that, A baffle plate (25) is provided on the front surface of the rear cover (20). The baffle plate (25) surrounds the outer periphery of the clearance hole (24) and abuts against the rear surface of the plate (11).

8. The LED display module according to any one of claims 1 to 3, characterized in that, The sealing element (40) is inserted through the vent (22).

9. The LED display module according to claim 8, characterized in that, The LED display module further includes a second cover plate (51) and a third cover plate (52) disposed on the rear side of the rear cover (20). The second cover plate (51) and the third cover plate (52) are disposed opposite each other in the length direction or width direction of the rear cover (20). A leveling groove (200) is formed between the second cover plate (51) and the rear cover (20). The LED display module further includes a leveling component (60) disposed between the rear cover (20) and the third cover plate (52). The leveling component (60) is adapted to the leveling groove (200). The second cover plate (51) and the third cover plate (52) are respectively fixed on the rear cover (20) by at least one of the sealing components (40).

10. An LED display device, comprising an LED display module, characterized in that, The LED display module is the LED display module according to any one of claims 1 to 9.

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