WO2021008294A1

WO2021008294A1 - Led display screen module

Info

Publication number: WO2021008294A1
Application number: PCT/CN2020/096704
Authority: WO
Inventors: 刘垣贤; 陈文艺
Original assignee: 深圳市洲明科技股份有限公司
Priority date: 2019-07-17
Filing date: 2020-06-18
Publication date: 2021-01-21
Also published as: CN210181973U

Abstract

A LED display screen module, comprising a bottom housing (1) and a lamp panel (2). The back surface of the lamp panel (2) contradicts the top surface of the bottom housing (1), the front surface of the lamp panel (2) is covered with a glue grouting layer (3), a step portion (4) is formed between the top surface of the bottom housing (1) and the peripheral wall of the lamp panel (2), and the step portion (4) is filled by a part of the glue grouting layer (3). The LED display screen module has good water resistant properties, and is particularly applicable to display module with small spacing.

Description

An LED display module

Technical field

The present invention relates to the technical field of LED display screens, in particular to an LED display screen module.

Background technique

When the existing outdoor LED display module is glued on the lamp surface, the side wall of the bottom shell is required to be higher than the height of the glue, that is, the upper end of the side wall of the bottom The glue is located in the frame structure, but for small-pitch LED display modules, especially for modules with a distance between LED lamp beads less than 4mm on the LED display module, the existing bottom shell is generally They are all made of plastic materials, and the thickness of the upper end of the side wall of the bottom shell is very thin, and cannot be molded by injection molding, that is, the frame-like structure cannot be injection molded. Therefore, the top surface of the bottom shell in the small-pitch LED display module in the prior art directly abuts the back of the light board, and there is no frame-like structure surrounding the light board. However, during actual use, it was found that external water vapor can enter the module through the gap between the contact surface of the light board and the bottom shell, causing damage to the electronic components on the light board. Therefore, the waterproof performance of the existing LED display module needs to be improved.

technical problem

In order to solve the problem that in the prior art, the external water vapor can enter the module from the gap between the contact surface of the light board and the bottom shell, causing damage to the electronic components on the light board, the present invention provides a Outside water vapor will not enter the display module inside the module through the gap between the light board and the contact surface of the bottom shell light board and the bottom shell. The display module includes: an LED display module, including a bottom shell and a light board, the back of the light board conflicts with the top surface of the bottom shell, the front of the light board is covered with a glue layer, and the top surface of the bottom shell A step is formed between the outer peripheral wall of the lamp board, and a part of the glue filling layer fills the step.

Technical solutions

Further, the outer peripheral wall of the glue potting layer is flush with the outer peripheral wall of the bottom shell.

Further, a mounting hole is provided on the bottom surface of the bottom shell, a connector for connecting the light board is provided in the mounting hole, and a first potting glue is filled in the mounting hole.

Further, the connecting member is a screw, and the head of the screw is wrapped in the first potting glue.

Further, the length of the top surface of the bottom shell is greater than the length of the back surface of the light panel, and the width of the top surface of the bottom shell is greater than the width of the back surface of the light panel.

Further, the top surface of the bottom case is provided with a first groove, the bottom surface of the bottom case is provided with a second groove opposite to the first groove, and the first groove and the second groove are connected by a through hole Generally, the first groove is annular and a second potting glue is potted in the first groove, and the second potting glue is in contact with the back surface of the light board.

Further, a first connecting rib is provided in the first groove, and the first connecting rib connects the two opposite inner side walls of the first groove, and there is an interval between the first connecting rib and the back surface of the light board.

Further, a second connecting rib is provided in the second groove, and the second connecting rib connects the two opposite inner side walls of the second groove, and the height of the second connecting rib is smaller than the depth of the second groove.

Further, another part of the second potting glue is located in the through hole.

Further, the remaining part of the second potting glue is located in the second groove.

Further, the number of the through holes is multiple.

Beneficial effect

The beneficial effect of the present invention is that after the step part is filled by the glue layer, the entrance of the gap between the top surface of the bottom shell and the back of the lamp board is blocked, and water vapor cannot enter the interior of the display module through the gap. The above improves the waterproof performance of the display module, which is especially suitable for the small-pitch display module; the structure is simple, no additional parts are needed, and it is beneficial to control the manufacturing cost.

Description of the drawings

FIG. 1 is a cross-sectional view of a display module structure according to the first embodiment of the present invention;

Figure 2 is an enlarged view of detail A in Figure 1;

3 is a schematic structural diagram (front side) of the bottom shell in the display module structure of the first embodiment of the present invention;

Figure 4 is an enlarged view of detail B in Figure 3;

5 is a schematic structural diagram (bottom surface) of the bottom shell in the display module structure of the first embodiment of the present invention;

Figure 6 is an enlarged view of detail C in Figure 5.

Label description:

1. The bottom shell;

2. Light board;

3. Glue layer;

4. Steps;

5. Mounting hole;

6. Screw;

7. Nut column;

8. The first groove;

9. The second groove;

10. Through holes;

11. The first connecting rib;

12. The second connecting rib;

13. The first potting glue;

14. The second potting compound.

Embodiments of the invention

In order to describe in detail the technical content, the achieved purpose and the effect of the present invention, the following description will be given in conjunction with the embodiments and accompanying drawings.

The key idea of the present invention is that the length of each side of the lamp panel is smaller than the length of the corresponding sides of the bottom shell, so that a step is formed between the top surface of the bottom shell and the outer peripheral wall of the lamp panel, and the lamp panel is in contact with the bottom shell. The gap of the surface is connected to the step. After a part of the potting layer fills the step, the entrance of the gap will be blocked, and water vapor cannot enter the display module through the gap.

1 to 6, an LED display module includes a bottom shell 1 and a light board 2. The back of the light board 2 conflicts with the top surface of the bottom shell 1, and the front of the light board 2 is provided with a plurality of arrays. LED lamp beads, the front surface of the light board 2 is covered with a glue layer 3, a step 4 is formed between the top surface of the bottom shell 1 and the outer peripheral wall of the light board 2, and a part of the glue layer 3 fills the step portion 4.

It can be seen from the above description that the beneficial effect of the present invention is that after the potting layer 3 fills the step 4, the entrance of the gap between the top surface of the bottom shell 1 and the back of the lamp panel 2 is blocked, and water vapor cannot enter through the gap. Inside the display module, the waterproof performance of the display module is greatly improved, which is especially suitable for small-pitch display modules; the structure is simple, no additional parts are required, and it is beneficial to control the manufacturing cost.

Further, the outer peripheral wall of the glue potting layer 3 is flush with the outer peripheral wall of the bottom shell 1.

It can be seen from the above description that the flush arrangement of the outer peripheral wall of the glue layer 3 and the outer peripheral wall of the bottom case 1 can make the glue layer 3 and the bottom case 1 smoothly transition, improve the aesthetics of the display module, and more importantly, can The thickness of the glue layer 3 located in the step portion 4 is ensured, thereby further improving the waterproof performance of the display screen module.

Further, a mounting hole 5 is provided on the bottom surface of the bottom shell 1, and a connector for connecting the light board 2 is provided in the mounting hole 5, and the mounting hole 5 is filled with a first potting glue 13 .

Further, the connecting member is a screw 6, and the head of the screw 6 is wrapped in the first potting glue 13.

From the above description, it can be seen that locking the light board 2 with the screw 6 can improve the structural stability of the display module; the setting of the first potting glue 13 can prevent water vapor from entering the display module through the mounting hole 5, which is beneficial to ensure the display module The waterproof performance of the group.

Further, the length of the top surface of the bottom shell 1 is greater than the length of the back surface of the light board 2, and the width of the top surface of the bottom shell 1 is greater than the width of the back surface of the light board 2.

From the above description, it can be seen that the light board 2 is surrounded by the stepped portion 4, so that the surroundings of the light board 2 are sealed.

Further, the top surface of the bottom case 1 is provided with a first groove 8, and the bottom surface of the bottom case 1 is provided with a second groove 9 opposite to the first groove 8, the first groove 8 and the second groove 8 The groove 9 is communicated with the through hole 10, the first groove 8 is ring-shaped and the first groove 8 is potted with a second potting glue 14, which is opposite to the back of the light board 2. contact.

It can be seen from the above description that the first groove 8 is arranged along the periphery of the lamp board 2; the second potting glue 14 flows into the first groove 8 through the second groove 9 and the through hole 10 and condenses, which can further prevent water vapor from passing through The gap between the contact surface of the light board 2 and the bottom shell 1 enters the inside of the display module, which is beneficial to further improve the waterproof performance of the display module. In addition, the through hole 10 also functions to provide an exhaust path for the air in the first groove 8.

Further, a first connecting rib 11 is provided in the first groove 8. The first connecting rib 11 connects the two opposite inner side walls of the first groove 8, between the first connecting rib 11 and the back of the light board 2. With intervals.

It can be seen from the above description that the arrangement of the first connecting rib 11 can increase the structural strength of the bottom shell 1 and help ensure the structural stability of the display module; the space between the first connecting rib 11 and the light board 2 can ensure that it is liquid The second potting glue 14 can flow smoothly on the back of the light board 2 to prevent glue leakage in a local area of the first groove 8 and help ensure the waterproof performance of the display module.

Further, a second connecting rib 12 is provided in the second groove 9. The second connecting rib 12 is connected to two opposite inner side walls of the second groove 9, and the height of the second connecting rib 12 is smaller than that of the second groove 9. depth.

It can be seen from the above description that the arrangement of the second connecting rib 12 can improve the structural strength of the bottom shell 1 and help ensure the structural stability of the display module; the height of the second connecting rib 12 is less than the depth of the second groove 9 to ensure the The liquid second potting glue 14 can flow smoothly in the second groove 9 to facilitate the self-leveling of the second potting glue 14.

Further, another part of the second potting glue 14 is located in the through hole 10.

It can be seen from the above description that when the second potting glue 14 is filled in the through hole 10, it means that the first groove 8 has been completely filled with the second potting glue 14, and the waterproof performance of the display module has been maximized.

Further, the remaining part of the second potting glue 14 is located in the second groove 9.

From the above description, when the second potting glue 14 is filled in the second groove 9, it means that the through hole 10 has been completely filled by the second potting glue 14. After filling the second groove 9 with the second potting glue 14, the aesthetics of the display screen module can be improved, which is beneficial to enhance the user experience.

Further, the number of the through holes 10 is multiple.

It can be seen from the above description that a plurality of through holes 10 can improve the potting efficiency of the first groove 8, reduce production time, and at the same time can accelerate the discharge of air in the first groove 8 to ensure that the potting device can The first groove 8 is continuously filled with glue.

Example one

Please refer to Figures 1 to 6, the first embodiment of the present invention is: please combine Figure 1 and Figure 2, an LED display module, including a bottom shell 1 and a light board 2, the back of the light board 2 and the bottom shell 1 The top surface of the light board 2 conflicts, the front surface of the light board 2 is covered with a glue layer 3, a step 4 is formed between the top surface of the bottom shell 1 and the outer peripheral wall of the light board 2, and a part of the glue layer 3 fills the step Part 4, the outer peripheral wall of the glue potting layer 3 and the outer peripheral wall of the bottom shell 1 are arranged flush. Viewed from the front of the LED display module, the step portion 4 is annular. In detail, the length of each side of the lamp panel 2 is smaller than the length of the corresponding sides of the bottom shell 1 to form the step 4, that is, the length of the top surface of the bottom shell 1 is greater than that of the back surface of the lamp panel 2. Length, the width of the top surface of the bottom shell 1 is greater than the width of the back surface of the light board 2.

In order to improve the stability of the connection between the light board 2 and the bottom housing 1, a mounting hole 5 is provided on the bottom surface of the bottom housing 1, and a connecting piece for connecting the light board 2 is provided in the mounting hole 5. The hole 5 is filled with the first potting glue 13. In this embodiment, the connecting member is a screw 6, and the head of the screw 6 is wrapped in the first potting glue 13; the lamp board 2 is provided with a nut that matches the screw 6 Column 7.

2 to 6, in order to further improve the waterproof performance of the LED display module, the top surface of the bottom case 1 is provided with a first groove 8, and the bottom surface of the bottom case 1 is provided with the first groove 8 8 is opposite to the second groove 9, the first groove 8 and the second groove 9 are connected through the through hole 10, the first groove 8 is ring-shaped and the first groove 8 is filled with a second pot The encapsulant 14 and the second encapsulant 14 are in contact with the back of the light board 2. It is easy to understand that the second groove 9 is also ring-shaped. Preferably, the number of the through holes 10 is multiple.

In order to ensure the structural stability of the bottom shell 1, a first connecting rib 11 is provided in the first groove 8. The first connecting rib 11 connects the two opposite inner side walls of the first groove 8, and the first connecting rib 11 and There is a gap between the back of the lamp board 2; the second groove 9 is provided with a second connecting rib 12, the second connecting rib 12 connects the two opposite inner side walls of the second groove 9, and the second connecting rib 12 The height is smaller than the depth of the second groove 9. Optionally, the first connecting rib 11 is connected to the bottom surface of the first groove 8.

Another part of the second potting glue 14 is located in the through hole 10, and the remaining part of the second potting glue 14 is located in the second groove 9.

In summary, the LED display module provided by the present invention has good waterproof performance, stable structure and low manufacturing cost, and is especially suitable for small-pitch display modules.

The above are only the embodiments of the present invention and do not limit the scope of the present invention. Any equivalent transformations made using the content of the description and drawings of the present invention, or directly or indirectly applied in related technical fields, are included in the same way Within the scope of patent protection of the present invention.

Claims

An LED display module includes a bottom shell and a lamp board. The back of the lamp board conflicts with the top surface of the bottom shell. The front surface of the lamp board is covered with a glue layer. It is characterized in that: A step is formed between the outer peripheral walls, and a part of the glue filling layer fills the step.
The LED display module of claim 1, wherein the outer peripheral wall of the glue-pouring layer is flush with the outer peripheral wall of the bottom case.
The LED display module according to claim 1, characterized in that: the bottom surface of the bottom case is provided with a mounting hole, the mounting hole is provided with a connector for connecting the light board, and the mounting hole Filled with the first potting glue.
3. The LED display module of claim 3, wherein the connecting member is a screw, and the head of the screw is wrapped in the first potting glue.
The LED display module of claim 1, wherein the length of the top surface of the bottom shell is greater than the length of the back surface of the light board, and the width of the top surface of the bottom shell is greater than that of the light board. The width of the back.
The LED display module of claim 1, wherein the top surface of the bottom case is provided with a first groove, and the bottom surface of the bottom case is provided with a second groove opposite to the first groove , The first groove is communicated with the second groove through the through hole, the first groove is ring-shaped and the second potting glue is potted in the first groove, and the second potting glue is connected to the back of the light board To contact.
7. The LED display module of claim 6, wherein a first connecting rib is provided in the first groove, and the first connecting rib connects two opposite inner side walls of the first groove, and the first connecting There is a space between the rib and the back of the light board.
The LED display module of claim 6, wherein a second connecting rib is provided in the second groove, and the second connecting rib connects the two opposite inner side walls of the second groove, and the second connection The height of the rib is smaller than the depth of the second groove.
7. The LED display module of claim 6, wherein a part of the second potting glue is located in the through hole, and a part of the second potting glue is located in the second groove.
7. The LED display module of claim 6, wherein the number of the through holes is multiple.