Anti-electromagnetic interference LCM display screen

Abstract

The utility model discloses an anti-electromagnetic interference LCM display screen, which relates to the technical field of LCM display screens and comprises a display screen body, a flexible printed circuit board for transmitting signals is arranged at the front end of the display screen body, and a magnetic field shielding film is wound on the outer surface of the flexible printed circuit board. A metal storage frame is arranged at the bottom of the display screen body, a metal pressing plate is arranged at the upper end of the display screen body, and the metal pressing plate and the metal storage frame are fixedly connected through three fixing mechanisms; according to the utility model, the protective layer formed by the metal pressing plate and the metal accommodating frame can effectively resist electromagnetic interference on the display screen body, and the magnetic field shielding film wound on the outer surface of the flexible printed circuit board can resist electromagnetic interference on the flexible printed circuit board; the fixing mechanism is arranged between the metal pressing plate and the metal storage frame, so that the metal pressing plate and the metal storage frame are simple and convenient to disassemble and assemble, and the display screen body is convenient to maintain.

Description

Technical Field

[0001] The utility model relates to the technical field of LCM display screens, in particular to an LCM display screen that is resistant to electromagnetic interference. Background Art

[0002] LCM, or liquid crystal module, refers to an assembly that combines a liquid crystal display device, connectors, peripheral circuits such as control and drive circuits, PCB circuit boards, backlight sources, and structural components. LCM is a fundamental high-tech component that serves as the display module for electronic products. It can be assembled with other components to form electronic products such as mobile phones and computers.

[0003] A typical LCM consists primarily of a screen, a flexible printed circuit board (FPC) connected to the screen, and upper and lower metal frames that protect the screen. The upper and lower metal frames provide electromagnetic interference protection for the screen. However, the FPC connected to the screen lacks electromagnetic interference protection, which reduces the overall electromagnetic interference protection of the LCM. Furthermore, the upper and lower metal frames are difficult to disassemble and assemble, making it difficult to repair the screen. Therefore, a LCM display with electromagnetic interference resistance has been proposed. Utility Model Content

[0004] The purpose of the present invention is to provide an LCM display screen that is resistant to electromagnetic interference, so as to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: an electromagnetic interference-resistant LCM display screen, comprising a display screen body, a flexible printed circuit board for transmitting signals being provided at the front end of the display screen body, a magnetic field shielding film being wrapped around the outer surface of the flexible printed circuit board, a metal storage frame being provided at the bottom of the display screen body, a metal pressure plate being provided at the upper end of the display screen body, the metal pressure plate and the metal storage frame being fixedly connected by three fixing mechanisms, the fixing mechanisms being composed of a connecting block and a spring expansion block.

[0006] As a further preferred embodiment of the present technical solution, the three fixing mechanisms are respectively distributed on the rear side, the left side and the right side of the metal storage frame.

[0007] As a further preferred embodiment of the present technical solution, the connecting block is fixedly connected to the bottom of the metal pressure plate, a connecting groove for accommodating the connecting block is provided on the side wall of the metal storage frame, spring expansion blocks are respectively provided on both sides of the connecting block, and card slots for accommodating the spring expansion blocks are respectively provided on the two inner walls of the connecting groove.

[0008] As a further preferred embodiment of the present technical solution, an extension block is fixedly connected to the side wall of the spring expansion block, and receiving grooves for accommodating the extension block are respectively provided at both ends of the connection block.

[0009] As a further preferred embodiment of the present technical solution, the display screen body is formed by stacking an upper polarizer, a color filter film, liquid crystal glass, a lower polarizer, black and white shading tape, an upper brightening film, a lower brightening film, a diffuser, a light guide plate, and a reflector from top to bottom.

[0010] As a further preferred embodiment of the present technical solution, a plastic frame is provided on the outer surface of the display screen body, and the plastic frame is embedded in the interior of the metal receiving frame, and the height of the plastic frame is equal to the depth of the metal receiving frame.

[0011] As a further preferred embodiment of the present technical solution, the front sides of the upper surfaces of the metal receiving frame and the plastic frame are respectively provided with placement grooves for accommodating flexible printed circuit boards, and the bottom front side of the metal pressure plate is fixedly connected with a pressure block acting on the flexible printed circuit board.

[0012] The utility model provides an LCM display screen that is resistant to electromagnetic interference and has the following beneficial effects:

[0013] The protective layer formed by the metal pressure plate and the metal storage frame of the utility model can effectively protect the display screen body from electromagnetic interference. The magnetic field shielding film wrapped around the outer surface of the flexible printed circuit board can protect the flexible printed circuit board from electromagnetic interference. The fixing mechanism provided between the metal pressure plate and the metal storage frame can make the disassembly and assembly between the two simple and convenient, thereby facilitating the maintenance of the display screen body. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0015] Figure 2 This is a schematic diagram of the disassembled structure of the overall structure of the utility model;

[0016] Figure 3 This is a schematic diagram of a further breakdown of the overall structure of the utility model;

[0017] Figure 4 For this utility model Figure 1 Schematic diagram of the structure of A;

[0018] In the figure: 1. Display screen body; 2. Flexible printed circuit board; 3. Metal pressure plate; 4. Metal storage frame; 5. Rubber frame; 6. Connecting block; 7. Connecting slot; 8. Spring expansion block; 9. Card slot; 10. Extension block; 11. Storage slot; 12. Upper polarizer; 13. Color filter; 14. LCD screen; 15. Lower polarizer; 16. Black and white shading tape; 17. Upper light-enhancing film; 18. Lower light-enhancing film; 19. Diffuser; 20. Light guide plate; 21. Reflector; 22. Placement slot; 23. Pressing block. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present invention will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the present invention.

[0020] The utility model provides a technical solution: Figures 1 to 4 As shown, in this embodiment, an electromagnetic interference-resistant LCM display screen includes a display screen body 1, a flexible printed circuit board 2 for transmitting signals is provided at the front end of the display screen body 1, the outer surface of the flexible printed circuit board 2 is wrapped with a magnetic field shielding film, a metal storage frame 4 is provided at the bottom of the display screen body 1, and a metal pressure plate 3 is provided at the upper end of the display screen body 1. The metal pressure plate 3 and the metal storage frame 4 are fixedly connected by three fixing mechanisms, and the three fixing mechanisms are respectively distributed on the rear side, left side and right side of the metal storage frame 4, and the fixing mechanism consists of a connecting block 6 and a spring expansion block 8.

[0021] Among them, the connecting block 6 is fixedly connected to the bottom of the metal pressure plate 3, and a connecting groove 7 for accommodating the connecting block 6 is opened on the side wall of the metal storage frame 4. Spring expansion blocks 8 are respectively arranged on both sides of the connecting block 6, and card slots 9 for accommodating the spring expansion blocks 8 are respectively opened on the two inner walls of the connecting groove 7.

[0022] When in use, the three connecting blocks 6 at the bottom of the metal pressure plate 3 and the three connecting grooves 7 on the metal storage frame 4 can play a positioning role to ensure that the metal pressure plate 3 and the metal storage frame 4 will not move relative to each other in the horizontal direction. By inserting the spring telescopic block 8 into the card groove 9 on the inner wall of the connecting groove 7, the relative movement of the metal pressure plate 3 and the metal storage frame 4 can be limited in the vertical direction, thereby fixing the metal pressure plate 3 and the metal storage frame 4 together.

[0023] The side wall of the spring expansion block 8 is fixedly connected to an extension block 10 , and both ends of the connection block 6 are respectively provided with receiving grooves 11 for accommodating the extension block 10 .

[0024] The provided connecting block 6 can facilitate the user to move the spring expansion block 8 , thereby facilitating the disassembly of the metal pressure plate 3 and the metal receiving frame 4 .

[0025] The display screen body 1 is formed by stacking an upper polarizer 12, a color filter 13, a liquid crystal screen 14, a lower polarizer 15, a black and white light-shielding tape 16, an upper brightness enhancement film 17, a lower brightness enhancement film 18, a diffuser 19, a light guide plate 20, and a reflector 21 from top to bottom.

[0026] The light guide plate 20 is used to convert the light emitted by the LED of the side backlight module into planar light; the reflective sheet 21 is used to reflect the light directed to the bottom back to make full use of the light; the diffuser 19 is used to diffuse the light to make the light uniform; the upper light-enhancing film 17 and the lower light-enhancing film 18 are used to increase the brightness of the light; the liquid crystal screen 14 is used for display; the upper polarizer 12 and the lower polarizer 15 are used to form polarized light to make the liquid crystal screen 14 form an image.

[0027] The outer surface of the display screen body 1 is covered with a plastic frame 5 , which is embedded in the metal receiving frame 4 . The height of the plastic frame 5 is equal to the depth of the metal receiving frame 4 .

[0028] This arrangement can conveniently fix the various components of the display screen body 1 into one body.

[0029] The front sides of the upper surfaces of the metal receiving frame 4 and the plastic frame 5 are respectively provided with placement slots 22 for accommodating the flexible printed circuit board 2 , and the bottom front side of the metal pressing plate 3 is fixedly connected with a pressing block 23 acting on the flexible printed circuit board 2 .

[0030] The flexible printed circuit board 2 can be accommodated by the placement groove 22 , and the flexible printed circuit board 2 can be fixed by the pressing block 23 .

[0031] The utility model provides an LCM display screen that is resistant to electromagnetic interference. The specific working principle is as follows:

[0032] When in use, place the display screen body 1 in the metal storage frame 4, and then align the three connecting blocks 6 at the bottom of the metal pressure plate 3 with the three connecting grooves 7 on the metal storage frame 4 to close the metal pressure plate 3 and the metal storage frame 4. The three connecting blocks 6 and the three connecting grooves 7 can play a positioning role to ensure that the metal pressure plate 3 and the metal storage frame 4 will not move relative to each other in the horizontal direction. During the closing process, the spring telescopic block 8 can be manually squeezed into the interior of the connecting block 6. When the metal pressure plate 3 and the metal storage frame 4 are closed, the spring telescopic block 8 will automatically pop out under the action of its built-in spring and insert into the card slot 9. The relative movement of the metal pressure plate 3 and the metal storage frame 4 can be restricted in the vertical direction, thereby fixing the metal pressure plate 3 and the metal storage frame 4 together. The protective layer formed by the metal pressure plate 3 and the metal storage frame 4 can effectively protect the display body 1 from electromagnetic interference, and the magnetic field shielding film wrapped around the outer surface of the flexible printed circuit board 2 can protect the flexible printed circuit board 2 from electromagnetic interference. When disassembly for maintenance is required, the staff only needs to press the extension block 10 on the spring telescopic block 8 and move it, and drive the spring telescopic block 8 to the inside of the connecting block 6 to complete the disassembly, which is efficient and convenient.

[0033] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An electromagnetic interference resistant LCM display screen, comprising a display screen body (1), characterized in that: A flexible printed circuit board (2) for transmitting signals is provided at the front end of the display screen body (1), and a magnetic field shielding film is wound around the outer surface of the flexible printed circuit board (2). A metal storage frame (4) is provided at the bottom of the display screen body (1), and a metal pressure plate (3) is provided at the upper end of the display screen body (1). The metal pressure plate (3) and the metal storage frame (4) are fixedly connected via three fixing mechanisms, and the fixing mechanisms are composed of a connecting block (6) and a spring expansion block (8).

2. The electromagnetic interference resistant LCM display screen according to claim 1, characterized in that: The three fixing mechanisms are respectively distributed on the rear side, the left side and the right side of the metal storage frame (4).

3. The electromagnetic interference resistant LCM display screen according to claim 1, characterized in that: The connecting block (6) is fixedly connected to the bottom of the metal pressure plate (3); a connecting groove (7) for accommodating the connecting block (6) is provided on the side wall of the metal receiving frame (4); spring expansion blocks (8) are respectively provided on both sides of the connecting block (6); and a clamping groove (9) for accommodating the spring expansion block (8) is respectively provided on the two inner walls of the connecting groove (7).

4. The electromagnetic interference resistant LCM display screen according to claim 1, characterized in that: An extension block (10) is fixedly connected to the side wall of the spring telescopic block (8), and receiving grooves (11) for accommodating the extension block (10) are respectively provided at both ends of the connection block (6).

5. The electromagnetic interference resistant LCM display screen according to claim 1, characterized in that: The display screen body (1) is formed by stacking an upper polarizer (12), a color filter film (13), a liquid crystal glass (14), a lower polarizer (15), a black and white light-shielding tape (16), an upper light-enhancing film (17), a lower light-enhancing film (18), a diffuser (19), a light guide plate (20), and a reflector (21) from top to bottom.

6. The electromagnetic interference resistant LCM display screen according to claim 1, characterized in that: The outer surface of the display screen body (1) is covered with a plastic frame (5), and the plastic frame (5) is embedded in the interior of the metal storage frame (4). The height of the plastic frame (5) is equal to the depth of the metal storage frame (4).

7. The electromagnetic interference resistant LCM display screen according to claim 6, characterized in that: The front sides of the upper surfaces of the metal receiving frame (4) and the plastic frame (5) are respectively provided with placement grooves (22) for accommodating the flexible printed circuit board (2), and the bottom front side of the metal pressing plate (3) is fixedly connected with a pressing block (23) acting on the flexible printed circuit board (2).

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