CN-224232071-U - Liquid crystal display device convenient to assemble

Abstract

The utility model discloses a liquid crystal display device convenient to assemble, which comprises a PCB (printed circuit board), a backlight source and a liquid crystal screen, wherein the backlight source comprises a rubber shell, a reflecting film, a light guide plate and a diffusion film which are sequentially arranged from bottom to top, a positioning structure and a guide channel are arranged on the rubber shell, the backlight source is matched with a positioning hole of the PCB through the positioning structure to realize rigid positioning, pins of the liquid crystal screen penetrate through the guide channel and are inserted into the PCB to be fixed, the edge of the lower surface of the reflecting film is supported by the rubber shell, the outer edge of the reflecting film is connected with the inner wall of the rubber shell, and the upper surface of the reflecting film is physically pressed and fixed by the liquid crystal screen. By the technical scheme, the assembly efficiency of the backlight source and the liquid crystal display is improved, the production of assembly defective products is avoided, the problem of sticking and warping is avoided, the leakage of edge light is avoided, and the backlight performance and effect are ensured.

Inventors

• QI CONGLEI
• JIANG YONG
• YE YANHUA

Assignees

• 杭州海加智能制造有限公司

Dates

Publication Date

20260512

Application Date

20250723

Claims (5)

1. 1. The liquid crystal display device convenient to assemble is characterized by comprising a PCB, a backlight source and a liquid crystal screen; The backlight source comprises a rubber shell, a reflecting film, a light guide plate and a diffusion film which are sequentially arranged from bottom to top, a positioning structure and a guide channel are arranged on the rubber shell, the backlight source is matched with a positioning hole of the PCB through the positioning structure to realize rigid positioning, and pins of the liquid crystal display pass through the guide channel and are inserted into the PCB to be fixed; The lower surface edge of the reflecting film is supported by the rubber shell, the outer edge of the reflecting film is connected with the inner wall of the rubber shell, and the upper surface of the reflecting film is fixed by the liquid crystal screen through physical lamination.
2. 2. The assembled liquid crystal display device of claim 1, wherein the positioning structure comprises at least two positioning posts disposed at a lower edge of the glue housing.
3. 3. The assembled lcd device of claim 1, wherein the guide channel is a guide hole penetrating the top and bottom surfaces of the plastic case, and the guide hole is used for the pins of the lcd panel, the pins of the lamp panel, and the pins of the indicator lamp to pass through and be inserted into the PCB board.
4. 4. The assembled liquid crystal display device of claim 1, wherein the power supply pins of the backlight source are soldered to the PCB board at one time using wave soldering technology.
5. 5. The assembled liquid crystal display device of claim 1, wherein the plastic housing is integrally injection molded and encapsulates the reflective film, the light guide plate, and the diffusion film.

Description

Liquid crystal display device convenient to assemble Technical Field The utility model relates to the technical field of light sources, in particular to a liquid crystal display device convenient to assemble. Background In the field of manufacturing of liquid crystal display modules, a backlight source is used as a core optical component to realize light path control in a long-term dependence on a multilayer film pasting process. The current mainstream scheme adopts a sandwich structure of an integral injection molding transparent substrate: (1) Laminating a reflective film on the bottom surface of the substrate; (2) The light emergent surface is covered with a diffusion film; (3) A light shielding film is adhered to the peripheral side. The technical route has three systematic defects in actual mass production: (1) Assembly yield and efficiency bottleneck The backlight source and the liquid crystal display are assembled through a multi-stage alignment procedure, the assembly working hours are long, the efficiency is low, and hidden dangers of defective products are generated. The flexible circuit (FPC) of the substrate is connected to the driving board through the puncture type connector, and the dislocation rate of the terminal is high. (2) Degradation of film interface reliability The adhesive has expansion coefficient mismatch under the temperature change working condition, the cyclic thermal stress can cause the sticking film to warp, the edge of the reflecting film is curled to lead to luminous flux attenuation, and the microstructure of the diffusion film is pressed and deformed to cause moire, so that the backlight performance is affected. (3) Edge light leakage The interface between the shading adhesive tape and the injection molding substrate has an engineering clearance, lateral light leakage and four-corner brightness non-uniformity are generated, so that dark corner visual flaws are formed, and the backlight effect is affected. Disclosure of utility model In view of the above problems, the utility model provides a liquid crystal display device convenient to assemble, and the positioning structure and the guide channel are arranged on the rubber shell, so that the positioning and guide structure can be provided for the assembly process of a backlight source and a liquid crystal screen, the assembly efficiency of the backlight source and the liquid crystal screen is improved, the production of assembly defective products is avoided, the problem of film sticking and warping is avoided due to the laminated structure of the rubber shell of the backlight source, the reflecting film and the liquid crystal screen, the edge light leakage is avoided due to the wrapping of the film layers such as the reflecting film and the light guide plate by the rubber shell, and the backlight performance and effect are ensured. In order to achieve the above purpose, the utility model provides a liquid crystal display device convenient to assemble, which comprises a PCB board, a backlight source and a liquid crystal screen; The backlight source comprises a rubber shell, a reflecting film, a light guide plate and a diffusion film which are sequentially arranged from bottom to top, a positioning structure and a guide channel are arranged on the rubber shell, the backlight source is matched with a positioning hole of the PCB through the positioning structure to realize rigid positioning, and pins of the liquid crystal display pass through the guide channel and are inserted into the PCB to be fixed; The lower surface edge of the reflecting film is supported by the rubber shell, the outer edge of the reflecting film is connected with the inner wall of the rubber shell, and the upper surface of the reflecting film is fixed by the liquid crystal screen through physical lamination. In the above technical solution, preferably, the positioning structure includes at least two positioning columns, and the positioning columns are disposed at a lower edge of the rubber shell. In the above technical solution, preferably, the guide channel is a guide hole penetrating through the top surface and the bottom surface of the glue shell, and the guide hole is used for the pins of the liquid crystal display, the pins of the lamp panel and the pins of the indicator lamp to pass through and be inserted into the PCB board. In the above technical solution, preferably, the power supply pins of the backlight source are soldered on the PCB board at one time by using a wave soldering technology. In the above technical solution, preferably, the plastic shell is formed by injection molding integrally, and encapsulates the reflective film, the light guide plate, and the diffusion film. Compared with the prior art, the backlight assembly structure has the beneficial effects that the positioning structure and the guide channel are arranged on the rubber shell, so that the positioning and the guide structure can be provided for the assembly process of the