LED module and display screen

Abstract

The utility model relates to an LED module which comprises a plastic frame, a clamped die-casting aluminum shell is arranged on one side of the plastic frame, a PCB and a mask are arranged on the other side of the plastic frame, sealant is poured between the PCB and a die-casting aluminum bottom shell, the die-casting aluminum shell is combined with the plastic frame, at the moment, a sealant pouring structure is adopted between the PCB and the die-casting aluminum shell, and therefore the LED module is formed. The plastic frame slows down heat dissipation, the die-casting aluminum bottom shell strengthens heat dissipation of the center position, heat dissipation of the middle positions of the plastic frame and the die-casting aluminum bottom shell is kept consistent through the sealant pouring structure, the temperature of the whole LED module is averagely reduced by about 5 DEG C, and the situation that a lamp panel has a yin face and a yang face is effectively improved.

Description

An LED module and display screen Technical Field

[0001] This utility model relates to the field of display screens, and in particular to an LED module and display screen. Background Technology

[0002] Conventional outdoor LED display modules of 480x320 typically use an integral die-cast aluminum base. During use, the heat emitted by the module is transmitted through the base itself at the frame position and through the air at the middle position. Due to the different heat conduction efficiencies of air and aluminum, the frame temperature is often low while the middle temperature is high, resulting in uneven lighting on the light-emitting surface. Summary of the Invention

[0003] Therefore, it is necessary to provide an LED module and display screen to address the problems in the existing technology.

[0004] An LED module includes a plastic frame, one side of which is provided with a die-cast aluminum housing that is snapped together, and the other side is provided with a PCB board and a faceplate, wherein sealant is injected between the PCB board and the die-cast aluminum base.

[0005] In one embodiment, the inner side of the plastic frame is provided with a positioning support part arranged along the frame, and the positioning support part is provided with a plurality of inner support columns on the side near the PCB board, and the PCB board abuts against the top surface of the inner support columns.

[0006] In one embodiment, the die-cast aluminum housing is provided with a die-cast support column at the same height as the top surface of the inner support column, and the middle position of the PCB board abuts against the top surface of the die-cast support column.

[0007] In one embodiment, the die-cast support column is provided with threaded holes, and the PCB board is fixed at the position of the die-cast support column by screws.

[0008] In one embodiment, the die-cast aluminum housing is provided with a plurality of honeycomb-shaped reinforcing ribs, which are recessed toward the outside of the die-cast aluminum housing on the side near the PCB board, and multiple independent planar portions are formed between the reinforcing ribs.

[0009] In one embodiment, the planar portion forms a recessed portion on the outside of the die-cast aluminum housing that is lower than the reinforcing rib, and the recessed portion is provided with a plurality of strip heat sinks.

[0010] In one embodiment, the edge of the die-cast aluminum housing is provided with a positioning step, and the positioning support part of the plastic frame is provided with a positioning protrusion adapted to the positioning step. The positioning protrusion protrudes to the inner side of the plastic frame. Both the positioning step and the positioning protrusion are provided with positioning holes, and the positioning holes are provided with fixing screws for fixing the die-cast aluminum housing and the plastic frame together.

[0011] In one embodiment, the positioning steps are provided at the four top corners of the pressed aluminum housing, and at least one positioning step is also provided at each side of the pressed aluminum housing.

[0012] In one embodiment, the die-cast aluminum housing is provided with terminal holes, and the PCB board connector extends to the outside of the die-cast aluminum housing at the terminal hole location.

[0013] A display screen employing the aforementioned LED module.

[0014] The aforementioned LED module and display screen combine a die-cast aluminum shell with a plastic frame. In this case, a sealant potting structure is used between the PCB board and the die-cast aluminum shell. The plastic frame slows down heat dissipation, while the die-cast aluminum bottom shell enhances heat dissipation in the center. The sealant potting structure ensures that the heat dissipation in the middle of the plastic frame and the die-cast aluminum shell is consistent, effectively improving the situation of uneven lighting on the lamp board. Attached Figure Description

[0015] Figure 1 is an exploded view of the display screen corresponding to the LED module of this utility model;

[0016] Figure 2 is a magnified structural diagram of point A in Figure 1;

[0017] Figure 3 is a schematic diagram of the back of the display screen corresponding to the LED module of this utility model;

[0018] Among them, 1. Plastic frame; 11. Positioning support; 12. Inner support column; 13. Positioning protrusion;

[0019] 2. Die-cast aluminum housing; 21. Die-cast support column; 22. Reinforcing rib; 23. Flat surface; 24. Positioning step; 25. Terminal hole;

[0020] 3. PCB board; 4. Face mask. Detailed Implementation

[0021] To make the above-mentioned objects, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0022] It should be noted that when an element is said to be "fixed to" another element, it can be directly on the other element or there may be an intervening element. When an element is said to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. Conversely, when an element is said to be "directly on" another element, there is no intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0023] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0024] As shown in Figures 1 to 3, an LED module includes a plastic frame 1. One side of the plastic frame 1 is provided with a die-cast aluminum shell 2 that is snapped together, and the other side is provided with a PCB board 3 and a face mask 4. The PCB board 3 and the die-cast aluminum shell are filled with sealant.

[0025] The die-cast aluminum housing 2 is combined with the plastic frame 1. At this time, the PCB board 3 and the die-cast aluminum housing 2 are connected by a sealant injection structure. The plastic frame 1 slows down heat dissipation, the die-cast aluminum bottom shell strengthens the heat dissipation in the center, and the sealant injection structure ensures that the heat dissipation in the middle of the plastic frame 1 and the die-cast aluminum housing 2 is consistent, effectively improving the situation of uneven lighting on the light board.

[0026] At this point, an electronic potting compound is used as the sealant, such as epoxy resin potting compound. After the electronic potting compound is poured between the PCB board and the die-cast aluminum housing, it can provide a certain sealing effect. During heat dissipation, the heat of the PCB board is transferred to the die-cast aluminum housing through the electronic potting compound, so that the heat dissipation of the entire PCB board is uniform.

[0027] At this point, the LED module is rectangular in shape, so the plastic frame 1 is a rectangular frame structure, and the die-cast aluminum shell 2 is rectangular in shape and is snapped into the inner side of the plastic frame 1.

[0028] At this time, the plastic frame 1 abuts against the side of the PCB board 3. In order to better abut the PCB board 3 and the plastic frame 1 together, in this embodiment, the inner side of the plastic frame 1 is provided with a positioning support part 11 along the frame. The positioning support part 11 is provided with a plurality of inner support columns 12 on the side near the PCB board 3. The top surface of the PCB board 3 abuts against the inner support columns 12. At this time, the positioning support part 11 protrudes towards the center, so that the inner support columns 12 abut against the PCB board 3, thereby providing support for the PCB board 3. In this way, the periphery of the PCB board 3 abuts against the plastic frame 1, thereby positioning the periphery of the PCB board 3. At this time, screw holes can also be provided at the positions of the inner support columns 12, and then the PCB board 3 and the plastic frame 1 can be fixed together by screws.

[0029] Meanwhile, in order to provide support for the middle position of the PCB board 3, the die-cast aluminum shell 2 is provided with a die-cast support column 21 with the same height as the top surface of the inner support column 12. The middle position of the PCB board 3 abuts against the top surface of the die-cast support column 21. In order to ensure that the PCB board 3 is not easily deformed, it is also necessary to provide support in the middle of the PCB board 3. At this time, the middle of the PCB board 3 mainly corresponds to the die-cast aluminum shell 2. Therefore, a corresponding die-cast support column 21 is set on the side of the die-cast aluminum shell 2. The top surface of the die-cast support column 21 is the same height as the inner support column 12. This can provide better support for the middle position of the PCB board 3, thereby ensuring that the PCB board 3 is not easily deformed.

[0030] In order to fix the PCB board 3 to the die-cast aluminum housing 2 while providing support, in this embodiment, the die-cast support column 21 is provided with threaded holes. The PCB board 3 is fixed at the position of the die-cast support column 21 by screws. After the threaded holes are provided, the PCB board 3 is fixed together with the die-cast aluminum housing 2 by screws. At this time, the threaded holes are holes that penetrate the die-cast aluminum housing 2, so that the PCB board 3 can be fixed together with the die-cast aluminum housing 2 from the outside of the die-cast aluminum housing 2 by screws.

[0031] To increase the overall strength of the die-cast aluminum housing 2 and the contact area between the sealant and the die-cast aluminum housing 2, in this embodiment, the die-cast aluminum housing 2 is provided with several honeycomb-shaped reinforcing ribs 22. The reinforcing ribs 22 are recessed towards the outside of the die-cast aluminum housing 2 on the side near the PCB board 3, and multiple independent planar portions 23 are formed between the reinforcing ribs 22. Viewed from the inside of the die-cast aluminum housing 2 (i.e., the side near the PCB board 3), the reinforcing ribs 22 are in a recessed state. The presence of the reinforcing ribs 22 increases the overall strength of the die-cast aluminum housing 2. Simultaneously, after filling with sealant, the contact area between the sealant and the die-cast aluminum housing 2 is increased, thereby improving heat dissipation efficiency during the heat dissipation process.

[0032] To further enhance the heat dissipation effect at the die-cast aluminum housing 2, in this embodiment, the planar portion 23 forms a recessed portion on the outer side of the die-cast aluminum housing 2 that is lower than the reinforcing rib 22. Several strip-shaped heat dissipation fins are provided in the recessed portion. After the reinforcing rib 22 is recessed, adjacent reinforcing ribs 22 form the planar portion 23. Viewed from the outside of the die-cast aluminum housing 2, the planar portion 23 is lower than the height of the reinforcing rib 22, forming the recessed portion. Viewed from the inside of the die-cast aluminum housing 2, the planar portion 23 is higher than the reinforcing rib 22. Since the planar portion 23 has a larger area, after contact with the sealant, to improve the heat dissipation efficiency at the planar portion 23, strip-shaped heat dissipation fins are provided in the recessed portion, which enhances the heat dissipation effect at the planar portion 23.

[0033] When the die-cast aluminum housing 2 and the plastic frame 1 are snapped together, they need to be positioned and fixed. In this embodiment, the edge of the die-cast aluminum housing 2 is provided with a positioning step 24, and the positioning support part 11 of the plastic frame 1 is provided with a positioning protrusion 13 adapted to the positioning step 24. The positioning protrusion 13 protrudes to the inner side of the plastic frame 1. Both the positioning step 24 and the positioning protrusion 13 are provided with positioning holes, and fixing screws are provided at the positioning hole positions for fixing the die-cast aluminum housing 2 and the plastic frame 1. When the die-cast aluminum housing 2 and the plastic frame 1 are connected, they need to be fixed. At this time, by setting the positioning step 24 and the positioning protrusion 13, positioning can be formed between the die-cast aluminum housing 2 and the plastic frame 1, thereby ensuring the accuracy of their position. At the same time, the die-cast aluminum housing 2 and the plastic frame 1 are fixedly connected by the positioning holes and fixing screws to form an LED module.

[0034] At this time, the face mask 4, which is set on the outside of the PCB board 3, is fixed to the outside of the PCB board 3 by buckles or fasteners, thereby forming a complete LED module.

[0035] Furthermore, the positioning steps 24 are provided at the four corners of the pressed aluminum housing, and at least one positioning step 24 is also provided on each side of the pressed aluminum housing. At this time, the PCB board 3 needs to be connected to the outside via a cable tray. Therefore, in this embodiment, the die-cast aluminum housing 2 is provided with terminal holes 25, and the cable trays inserted into the PCB board 3 extend to the outside of the die-cast aluminum housing 2 at the terminal holes 25.

[0036] Another embodiment of this utility model includes a display screen that uses the above-described LED module.

[0037] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0038] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. An LED module, characterized in that, It includes a plastic frame, one side of which is provided with a die-cast aluminum shell that snaps in, and the other side is provided with a PCB board and a faceplate. The PCB board and the die-cast aluminum base shell are filled with sealant.

2. The LED module according to claim 1, characterized in that, The inner side of the plastic frame is provided with a positioning support part along the frame. The positioning support part is provided with several inner support columns on the side near the PCB board. The PCB board abuts against the top surface of the inner support columns.

3. The LED module according to claim 2, characterized in that, The die-cast aluminum housing is provided with a die-cast support column at the same height as the top surface of the inner support column, and the middle position of the PCB board abuts against the top surface of the die-cast support column.

4. The LED module of claim 3, wherein, The die-cast support column is provided with threaded holes, and the PCB board is fixed to the die-cast support column by screws.

5. The LED module according to any one of claims 1 to 3, characterized in that, The die-cast aluminum shell is provided with several honeycomb-shaped reinforcing ribs. The reinforcing ribs are recessed towards the outside of the die-cast aluminum shell on the side near the PCB board, and multiple independent planar portions are formed between the reinforcing ribs.

6. The LED module according to claim 5, characterized in that, The planar portion forms a recessed area on the outside of the die-cast aluminum shell that is lower than the reinforcing ribs, and the recessed area is provided with several strip-shaped heat sinks.

7. The LED module according to claim 2, characterized in that, The die-cast aluminum housing has a positioning step on its edge, and the positioning support part of the plastic frame has a positioning protrusion that matches the positioning step. The positioning protrusion protrudes to the inner side of the plastic frame. Both the positioning step and the positioning protrusion have positioning holes, and the positioning holes are equipped with fixing screws for fixing the die-cast aluminum housing and the plastic frame together.

8. The LED module according to claim 7, characterized in that, The positioning steps are provided at the four top corners of the pressed aluminum shell, and at least one positioning step is also provided on each side of the pressed aluminum shell.

9. The LED module according to claim 1, characterized in that, The die-cast aluminum housing is provided with terminal holes, and the wires connected to the PCB board extend to the outside of the die-cast aluminum housing at the terminal hole positions.

10. A display screen, characterized in that, The LED module used is any one of claims 1-8.

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