Liquid crystal display device convenient to assemble

Abstract

The utility model discloses a liquid crystal display device convenient to assemble. The liquid crystal display device comprises 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 achieve rigid positioning, and 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. According to the technical scheme, the assembling efficiency of the backlight source and the liquid crystal screen is improved, defective products are prevented from being produced, the problem that a pasting film warps is solved, edge light leakage is avoided, and the backlight performance and effect are guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of light source technology, and in particular to a liquid crystal display device that is easy to assemble. Background Technology

[0002] In the field of LCD module manufacturing, backlights, as core optical components, have long relied on multi-layer lamination processes for optical path control. The current mainstream solution employs a sandwich structure with a single injection-molded transparent substrate.

[0003] (1) A reflective film is laminated on the bottom surface of the substrate;

[0004] (2) The light-emitting surface is covered with a diffusion film;

[0005] (3) Apply a light-blocking film to the perimeter.

[0006] This technical approach suffers from three systemic flaws in actual mass production:

[0007] (1) Assembly yield and efficiency bottlenecks

[0008] The assembly of the backlight and LCD screen requires multiple alignment processes, resulting in long assembly times, low efficiency, and the potential for defective products. The flexible printed circuit (FPC) substrate needs to be connected to the driver board via piercing connectors, leading to a high rate of terminal misalignment.

[0009] (2) Deterioration of membrane interface reliability

[0010] When the adhesive undergoes a mismatch in its coefficient of thermal expansion under temperature changes, cyclic thermal stress can cause the film to lift, the edge of the reflective film to curl, which can lead to a decrease in light flux, and the microstructure of the diffuser film to deform under pressure, resulting in moiré patterns and affecting backlight performance.

[0011] (3) Edge light leakage

[0012] The interface between the light-shielding tape and the injection-molded substrate has a gap, which causes lateral light leakage and uneven brightness at the four corners, resulting in dark corner visual defects and affecting the backlight effect. Utility Model Content

[0013] To address the aforementioned problems, this utility model provides a conveniently assembled liquid crystal display device. Through the positioning structure and guide channel provided on the housing, it offers positioning and guidance for the assembly process of the backlight and LCD screen, improving assembly efficiency and preventing defective products. Furthermore, the overlapping structure of the backlight housing, reflective film, and LCD screen avoids film peeling issues. The housing's wrapping of the reflective film, light guide plate, and other film layers prevents edge light leakage, ensuring backlight performance and effect.

[0014] To achieve the above objectives, this utility model provides a liquid crystal display device that is easy to assemble, comprising: a PCB board, a backlight, and a liquid crystal screen;

[0015] The backlight includes a housing, a reflective film, a light guide plate, and a diffuser film arranged sequentially from bottom to top. The housing is provided with a positioning structure and a guide channel. The backlight is rigidly positioned by the positioning structure cooperating with the positioning holes of the PCB board. The pins of the LCD screen pass through the guide channel and are inserted into the PCB board for fixation.

[0016] The lower surface edge of the reflective film is supported by the adhesive shell, the outer edge of the reflective film is connected to the inner wall of the adhesive shell, and the upper surface of the reflective film is physically pressed and fixed by the liquid crystal screen.

[0017] In the above technical solution, preferably, the positioning structure includes at least two positioning posts, which are disposed on the lower edge of the rubber shell.

[0018] In the above technical solution, preferably, the guide channel adopts a guide hole that penetrates the top and bottom surfaces of the housing, and the guide hole allows the pins of the LCD screen, the light board pins and the indicator light pins to pass through and be inserted into the PCB board.

[0019] In the above technical solution, preferably, the power supply pins of the backlight are soldered to the PCB board in one step using wave soldering technology.

[0020] In the above technical solution, preferably, the shell is integrally injection molded and wraps the reflective film, the light guide plate and the diffusion film.

[0021] Compared with the prior art, the beneficial effects of this utility model are as follows: the positioning structure and guide channel set on the housing can provide positioning and guide structure for the assembly process of the backlight and the LCD screen, improve the assembly efficiency of the backlight and the LCD screen, avoid the generation of defective products, and the overlapping structure of the backlight housing and reflective film with the LCD screen avoids the problem of film lifting. The housing's wrapping of reflective film, light guide plate and other film layers avoids edge light leakage, ensuring backlight performance and effect. Attached Figure Description

[0022] Figure 1 This is an exploded structural diagram of a liquid crystal display device with convenient assembly, as disclosed in one embodiment of the present invention.

[0023] Figure 2 This is a three-dimensional structural schematic diagram of a backlight source disclosed in one embodiment of the present utility model;

[0024] Figure 3 This is a front view of a backlight source disclosed in one embodiment of the present utility model;

[0025] Figure 4 This is a top view of a backlight source disclosed in one embodiment of the present utility model;

[0026] Figure 5 This is a left view of a backlight source disclosed in one embodiment of the present invention.

[0027] In the diagram, the correspondence between the components and the reference numerals is as follows:

[0028] 1. PCB board; 2. Housing; 3. Lamp board pins; 4. Reflective film; 5. Light guide plate; 6. Diffuser film; 7. LCD screen; 8. LCD screen pin guide hole; 9. Indicator light pin guide hole; 10. Positioning post. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0030] The present invention will now be described in further detail with reference to the accompanying drawings:

[0031] like Figures 1 to 5 As shown, a liquid crystal display device with convenient assembly according to the present invention includes: a PCB board 1, a backlight and a liquid crystal screen 7.

[0032] The backlight includes a housing 2, a reflective film 4, a light guide plate 5, and a diffuser film 6 arranged sequentially from bottom to top. The housing 2 is provided with a positioning structure and a guide channel. The backlight is rigidly positioned by cooperating with the positioning holes of the PCB board 1 through the positioning structure. The pins of the LCD screen pass through the guide channel and are inserted into the PCB board 1 for fixation.

[0033] The lower edge of the reflective film 4 is supported by the housing 2, the outer edge of the reflective film 4 is connected to the inner wall of the housing 2, and the upper surface of the reflective film 4 is physically pressed and fixed by the liquid crystal screen 7.

[0034] In this embodiment, the positioning structure and guide channel provided on the housing 2 can provide positioning and guidance for the assembly process of the backlight and the LCD screen, improve the assembly efficiency of the backlight and the LCD screen 7, avoid the generation of defective products, and the overlapping structure of the housing 2 and the reflective film 4 with the LCD screen 7 avoids the problem of film peeling. The housing 2's wrapping of the reflective film 4, light guide plate 5 and other film layers avoids edge light leakage, ensuring the backlight performance and effect.

[0035] Specifically, the positioning structure can employ a single positioning post, multiple positioning posts, or irregularly shaped snap-fits, with the aim of positioning the backlight relative to the PCB board 1 during the assembly process. The bottom of the reflective film 4 is supported by the housing 2, and the top is pressed together by the LCD screen 7. The outer edge is surrounded by the inner wall of the housing 2, which can both physically press the reflective film 4 to prevent it from warping and achieve a light-shielding effect.

[0036] In the above embodiments, preferably, the positioning structure includes at least two positioning posts 10, which are disposed on the lower edge of the housing 2. During implementation, the positioning posts 10 of the housing 2 are inserted along the positioning holes of the PCB board 1 to achieve the positioning and assembly of the backlight relative to the PCB board 1.

[0037] In the above embodiment, preferably, the guide channel adopts a guide hole that penetrates the top and bottom surfaces of the housing 2, including LCD screen pin guide hole 8, lamp board pin guide hole and indicator light pin guide hole 9, which allow the LCD screen pins, lamp board pins 3 and indicator light pins to pass through and be directly inserted into the corresponding positions on the PCB board 1 for fixation. This eliminates the need to align the corresponding pins with the corresponding fixing holes on the PCB board 1 during the assembly process, thus improving assembly efficiency.

[0038] In the above embodiments, preferably, the power supply pins of the backlight are soldered onto the PCB board 1 in one go using wave soldering technology, thereby improving soldering efficiency.

[0039] In the above embodiments, preferably, the housing 2 is integrally injection molded and wraps the reflective film 4, the light guide plate 5 and the diffusion film 6 to avoid light leakage and ensure the backlight effect.

[0040] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A liquid crystal display device that is easy to assemble, characterized in that, include: PCB board, backlight and LCD screen; The backlight includes a housing, a reflective film, a light guide plate, and a diffuser film arranged sequentially from bottom to top. The housing is provided with a positioning structure and a guide channel. The backlight is rigidly positioned by the positioning structure cooperating with the positioning holes of the PCB board. The pins of the LCD screen pass through the guide channel and are inserted into the PCB board for fixation. The lower surface edge of the reflective film is supported by the adhesive shell, the outer edge of the reflective film is connected to the inner wall of the adhesive shell, and the upper surface of the reflective film is physically pressed and fixed by the liquid crystal screen.

2. The easily assembled liquid crystal display device according to claim 1, characterized in that, The positioning structure includes at least two positioning posts, which are located at the lower edge of the housing.

3. The easily assembled liquid crystal display device according to claim 1, characterized in that, The guide channel adopts a guide hole that penetrates the top and bottom surfaces of the housing. The guide hole allows the pins of the LCD screen, the light board pins, and the indicator light pins to pass through and be inserted into the PCB board.

4. The easily assembled liquid crystal display device according to claim 1, characterized in that, The power supply pins of the backlight are soldered onto the PCB board in one step using wave soldering technology.

5. The easily assembled liquid crystal display device according to claim 1, characterized in that, The housing is integrally injection molded and encapsulates the reflective film, the light guide plate, and the diffusion film.

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