LED display screen outdoor module and assembling method

Abstract

The LED display screen outdoor module comprises a die-casting bottom shell, two CNC machining faces are arranged on the peripheral face of the die-casting bottom shell, and an annular glue pouring area is formed between the two CNC machining faces; the LED lamp panel and the die-casting bottom shell are arranged in an up-down overlapping mode, the LED lamp panel makes contact with the CNC machining face, and a contact hollow-out area is formed in the annular glue pouring area; a positioning mechanism is further arranged between the LED lamp panel and the die-casting bottom shell, and the LED lamp panel and the die-casting bottom shell are positioned and assembled through the positioning mechanism. By adopting the up-down stacked structural design, the mode that an LED lamp panel is surrounded by a traditional plastic bottom shell is thoroughly abandoned, the limit requirement for the plastic wall thickness is avoided, and the reliability and production consistency of the module structure are effectively improved.

Description

Technical Field

[0001] The invention relates to the field of LED display screens, and in particular to an outdoor module of an LED display screen and an assembly method thereof. Background Art

[0002] With the continuous development of LED display technology, outdoor LED display screens have been widely used in advertising, public information release, stage display and other fields. However, there are many unfavorable factors in the outdoor environment, such as rain, dust, temperature difference, etc., which puts extremely high requirements on the waterproof performance and structural stability of LED display screens.

[0003] Traditional outdoor LED display modules usually use a combination of a plastic bottom shell and an LED light board. The LED light board is surrounded by a plastic bottom shell and sealed with glue at the joints to achieve waterproofing. However, this structure faces the following technical difficulties when applied to LED displays with pixel pitches of P2.3 or below: When the plastic bottom shell surrounds the LED light board, due to the small pitch design, its local wall thickness needs to be 0.3mm or even smaller. This places extremely high demands on the plastic molding process, increasing production costs and defect rates.

[0004] The extremely thin wall area of ​​the plastic bottom shell is prone to peeling and breaking, resulting in a decrease in structural strength. At the same time, due to the uneven contact area between the LED light board and the plastic bottom shell, problems such as incomplete filling and residual bubbles may occur during the glue filling process, seriously affecting the waterproof performance and long-term reliability of the module.

[0005] The traditional assembly method of plastic base and LED light board has bottlenecks in precision control and batch production consistency, and it is difficult to meet the market demand for high-quality small-pitch outdoor LED display screens. Summary of the invention

[0006] In order to solve the above problems, the present invention provides an outdoor module of an LED display screen and an assembly method, which can effectively improve the waterproof performance and structural stability, adapt to small-pitch outdoor display applications, and at the same time simplify the production process and reduce manufacturing costs.

[0007] The present invention is realized by the following technical scheme: an outdoor LED display module, comprising: A die-cast bottom shell, wherein two CNC machined surfaces are arranged on the four sides of the die-cast bottom shell, and an annular glue-filling area is formed between the two CNC machined surfaces; An LED light board is superimposed on the die-cast bottom shell, the LED light board contacts the CNC machined surface, and forms a contact hollow area in the annular glue-filled area; A positioning mechanism is also provided between the LED light board and the die-cast bottom shell, and the LED light board and the die-cast bottom shell are positioned and assembled by the positioning mechanism.

[0008] As a preferred technical solution, the die-cast bottom shell is provided with more than one glue injection port on the side facing away from the LED light board. The glue injection ports are arranged around the die-cast bottom shell, and each glue injection port is communicated with the annular glue pouring area. Glue is injected into the annular glue pouring area through the glue injection ports.

[0009] As a preferred technical solution, the positioning mechanism includes arranged copper columns arranged on the LED light board, and corresponding copper column positioning holes are arranged on the die-cast bottom shell corresponding to the arranged copper columns, and the LED light board is positioned and assembled through the arranged copper columns and the copper column positioning holes.

[0010] As a preferred technical solution, the copper pillars are arranged in a 5X5 arrangement.

[0011] As a preferred technical solution, a signal connector is also provided on the LED lamp board.

[0012] As a preferred technical solution, a signal interface waterproof ring is further provided at a position corresponding to the signal interface on the die-cast bottom shell.

[0013] As a preferred technical solution, a plurality of glue guiding grooves are provided in the annular glue pouring area where the four sides of the die-cast bottom shell contact the LED light board. The glue guiding grooves are arranged at intervals along the length direction of the annular glue pouring area to guide the glue to flow evenly.

[0014] The present invention provides an assembly method for an outdoor LED display module, comprising the following steps: (1) Provide a CNC-processed die-cast bottom shell to ensure the flatness of the surrounding surfaces of the bottom shell; (2) Position the LED light board on the die-cast bottom shell through the 5x5 copper pillars; (3) Inject glue into the annular glue filling area between the die-cast bottom shell and the contact surface of the LED light board. The glue flows naturally in the glue guide groove and solidifies to form a complete waterproof layer. (4) Install the signal interface waterproof ring at the signal interface position corresponding to the injection port on the die-cast bottom shell to complete the waterproof seal.

[0015] The beneficial effects of the present invention are as follows: the present invention provides an improved outdoor LED display screen module, which completely abandons the traditional method of surrounding the LED light board with a plastic bottom shell by adopting an upper and lower superimposed structure design, avoids the extreme requirements on the thickness of the plastic wall, and effectively improves the reliability of the module structure and the production consistency; By setting CNC finishing surfaces around the die-cast bottom shell, the contact flatness with the LED light board is ensured, further improving the assembly accuracy and structural stability; At the same time, an innovative annular glue injection area design is adopted. Glue is injected after the LED light panel is installed. The glue automatically flows and solidifies under the guidance of the hollow design to form a complete closed annular waterproof layer, eliminating the risk of water leakage caused by insufficient local glue injection in traditional structures. In addition, the 5x5 arranged copper column positioning mechanism ensures the precise assembly of the LED light board and the die-cast bottom shell, effectively preventing the displacement and loosening of the LED light board. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 Schematic diagram of the explosion of the present invention Figure 1 ; Figure 2 Schematic diagram of the explosion of the present invention Figure 2 ; Figure 3 It is a schematic diagram of the overall structure of the present invention; Description of reference numerals: 2. Die-cast bottom shell; 8. CNC machined surface; 9. Annular glue filling area; 3. LED light board; 4. Arranged copper pillars; 6. Copper pillar positioning holes; 7. Glue injection port; 5. Signal connector; 1. Signal interface waterproof ring. DETAILED DESCRIPTION

[0018] All features disclosed in this specification, or steps in all methods or processes disclosed, except mutually exclusive features and / or steps, can be combined in any manner.

[0019] Any feature disclosed in this specification (including any additional claims, abstract and drawings), unless otherwise stated, may be replaced by other equivalent or alternative features with similar purposes. That is, unless otherwise stated, each feature is only an example of a series of equivalent or similar features.

[0020] like Figure 1-Figure 3As shown, the present invention proposes an improved outdoor LED display module, which fully considers the common adverse factors in the outdoor environment, such as rain, dust and high humidity, and strives to solve the shortcomings of traditional LED display modules in terms of waterproof performance, structural strength and process stability. By adopting a new die-cast bottom shell 2 and LED light board 3 superimposed structure design, it fundamentally gets rid of the process limitation of the traditional plastic bottom shell surrounding the LED light board 3, significantly improves the waterproof performance and mechanical stability of the module, and is suitable for high-precision LED display screens with a spacing below P2.3.

[0021] In terms of specific structural design, the die-cast bottom shell 2 is made of aluminum alloy or other high-strength metal materials, and is processed by CNC precision to form two CNC processed planes on its four sides; The two planes not only ensure a high degree of flatness in contact with the LED light board 3, but also form a closed annular glue-filling area 9 between the two planes; In the annular glue pouring area 9, a plurality of glue guide grooves are arranged at intervals, and these glue guide grooves are arranged in parallel lines and run through the length direction of the entire glue pouring area. The glue guide grooves can not only guide the glue to flow evenly during the glue pouring process, but also prevent the glue from forming bubbles during the curing process, thereby improving the overall sealing performance.

[0022] The LED light board 3 adopts a standard circuit board design, and its back side is precisely connected and fixed to the die-cast bottom shell 2 through multiple arranged copper pillars. These copper pillars are evenly arranged in a 5x5 array, and have good force distribution performance; The bottom of each copper column is designed with an installation guide structure to match the corresponding copper column positioning hole 6 on the die-cast bottom shell 2, ensuring that the LED light board 3 can be quickly aligned and accurately assembled during the installation process. In addition, the copper column is made of conductive metal material, which can take into account both electrical connection and support when necessary, reducing additional connection structures and improving overall assembly efficiency.

[0023] In order to ensure the long-term stable operation of the module, the present invention specially designs multifunctional glue injection ports 7, which are evenly distributed along the back edge of the die-cast bottom shell 2, and all the glue injection ports 7 are connected to the annular glue injection area 9; When injecting glue, the glue enters the glue injection area through the glue injection port 7 and spreads evenly under the guidance of the glue guide groove until the entire annular glue injection area 9 is completely filled; Through the above structure, the glue filling quality of the module can be ensured to be consistent even in mass production, effectively solving the leakage risk caused by uneven glue distribution or insufficient local filling in the traditional glue injection method.

[0024] In terms of signal connection design, a standard signal connector 5 is installed on the LED light board 3, which is responsible for data exchange with the external control system. Corresponding to the position of the signal connector 5, a special signal interface waterproof ring 1 is designed at the signal interface position of the die-cast bottom shell 2. The waterproof ring is made of elastic rubber or other polymer materials. After the LED light board 3 and the die-cast bottom shell 2 are assembled, it can form a tight seal through slight compression, effectively preventing the infiltration of water vapor and dust, and ensuring the long-term stability and reliability of the signal connection.

[0025] During assembly, a high-precision die-cast bottom shell 2 processed by CNC is first selected, and the surface quality of the processed surfaces around the bottom shell is inspected to ensure that its flatness meets the design requirements; Then, align the copper pillars on the back of the LED light board 3 with the corresponding positioning holes of the die-cast bottom shell 2 one by one, and press them into the positioning holes by applying slight pressure to complete the preliminary positioning and assembly of the LED light board 3 and the die-cast bottom shell 2; Next, glue is injected one by one along the glue injection ports 7 on the back of the die-cast bottom shell 2, so that the glue is diffused to the entire annular glue injection area 9 through the glue guide groove. The glue flows automatically under the guidance of the glue guide groove to ensure that the entire glue injection area is evenly filled and tightly packaged; After the glue is cured, the waterproof structure of the module is completed, forming an overall waterproof layer with high sealing performance.

[0026] Finally, a waterproof ring is installed at the signal interface position of the die-cast bottom shell 2. The outer edge of the waterproof ring is fixed to the bottom shell by mechanical pressing, and a sealed connection is achieved after the LED light board 3 and the bottom shell are assembled; Through this sealing structure, the module can effectively prevent the penetration of water vapor and dust during long-term use, thereby extending the service life of the equipment. It not only improves the waterproof performance and mechanical strength of the LED display, but also reduces the process complexity and assembly difficulty in the production process, providing reliable guarantee for the mass production of high-density and small-pitch outdoor LED displays.

[0027] The outdoor module solution for LED display screens proposed in the present invention proposes systematic improvements to multiple technical pain points in traditional processes. Through reasonable mechanical structure design and precise processing technology control, it not only improves the waterproof performance and structural strength of the module, but also significantly reduces the difficulty of the production process and the cost of large-scale production. It has broad market application potential.

[0028] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that are not conceived through creative work should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope defined in the claims.

Claims

1. An outdoor LED display module, characterized in that: include: A die-cast bottom shell (2), wherein two CNC machined surfaces (8) are arranged on the four sides of the die-cast bottom shell (2), and an annular glue-filling area (9) is formed between the two CNC machined surfaces (8); An LED light board (3) is arranged to overlap with the die-cast bottom shell (2) from top to bottom, the LED light board (3) is in contact with the CNC machined surface (8), and forms a contact hollow area in the annular glue-filled area (9); A positioning mechanism is also provided between the LED light board (3) and the die-cast bottom shell (2), and the LED light board (3) and the die-cast bottom shell (2) are positioned and assembled by means of the positioning mechanism.

2. The outdoor LED display module according to claim 1, characterized in that: The die-cast bottom shell (2) is provided with one or more glue injection ports (7) on a side facing away from the LED light panel (3), and the glue injection ports (7) are arranged around the die-cast bottom shell (2), and each of the glue injection ports (7) is communicated with the annular glue injection area (9), and glue is injected into the annular glue injection area (9) through the glue injection ports (7).

3. The outdoor LED display module according to claim 1, characterized in that: The positioning mechanism comprises an arrangement copper column (4) arranged on the LED light board (3), and a corresponding copper column positioning hole (6) is arranged on the die-cast bottom shell (2) corresponding to the arrangement copper column (4), and the LED light board (3) is positioned and assembled through the arrangement copper column (4) and the copper column positioning hole (6).

4. The outdoor LED display module according to claim 3 is characterized in that: The copper columns (4) are arranged in a 5×5 arrangement.

5. The outdoor LED display module according to claim 1, characterized in that: The LED lamp board (3) is also provided with a signal connector (5).

6. The outdoor LED display module according to claim 1, characterized in that: A signal interface waterproof ring (1) is also provided on the die-cast bottom shell (2) at a position corresponding to the signal interface.

7. The outdoor LED display module according to claim 1, characterized in that: A plurality of glue guide grooves are provided in the annular glue pouring area (9) where the four sides of the die-cast bottom shell (2) are in contact with the LED light board (3). The glue guide grooves are arranged at intervals along the length direction of the annular glue pouring area (9) to guide the glue to flow evenly.

8. A method for assembling an outdoor module of an LED display screen, characterized in that: The following steps are involved: (1) Provide a CNC-processed die-cast bottom shell (2) to ensure the flatness of the four sides of the bottom shell; (2) Position the LED light board (3) on the die-cast bottom shell (2) through the copper pillars arranged in 5x5; (3) Glue is injected into the annular glue injection area (9) between the contact surfaces of the die-cast bottom shell (2) and the LED light board (3), and the glue flows naturally in the glue guide groove and solidifies to form a complete waterproof layer; (4) Install the signal interface waterproof ring (1) at the signal interface position corresponding to the injection port (7) on the die-cast bottom shell (2) to complete the waterproof seal.

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