Large-size COG liquid crystal display screen

Abstract

The utility model relates to the field of liquid crystal display screens, and particularly discloses a large-size COG liquid crystal display screen which comprises a COG liquid crystal display screen, a circuit board, a backlight underframe and a pressing frame, the COG liquid crystal display screen is arranged on the front face of the backlight underframe, the pressing frame is connected with the backlight underframe in a buckled mode, the COG liquid crystal display screen is connected with an FPC, the FPC is electrically connected with the circuit board, and the circuit board is electrically connected with the pressing frame. The two side edges of the backlight bottom frame are provided with first buckling pieces, the circuit board is arranged on the back side of the backlight bottom frame, and the side edges of the circuit board are clamped and fixed through the first buckling pieces. The COG liquid crystal display screen is supported by the backlight bottom frame, the COG liquid crystal display screen is fixed through the pressing frame, the circuit board is fixed to the back side of the backlight bottom frame through the first buckling piece, installation and fixation are facilitated, the COG liquid crystal display screen is supported and installed through the backlight bottom frame, the installation stability of the COG liquid crystal display screen is guaranteed, and the COG liquid crystal display screen is suitable for the large-size COG liquid crystal display screen. And the use scene of a customer can be met.

Description

Technical Field

[0001] The utility model relates to the field of liquid crystal display screens, in particular to a large-size COG liquid crystal display screen. Background Art

[0002] COG is the abbreviation of "Chip on Glass", which means the chip is directly bound to the glass. It is a packaging technology for liquid crystal displays. COG packaging technology directly packages the driver IC on the liquid crystal glass through anisotropic conductive adhesive (ACF), so that the conductive bumps of the driver IC are interconnected and packaged with the ITO transparent conductive pads on the liquid crystal glass, thereby lighting up the screen. With the continuous changes in the market demand for LCD screens, it is necessary to meet the usage scenarios of different clients for the products. The structure of the COG liquid crystal display does not have an iron frame structure. For some large equipment, outdoor equipment, etc., the overall size of the COG liquid crystal display required is larger. Conventional COG liquid crystal displays are difficult to install. For this reason, a large-size COG liquid crystal display is designed. Utility Model Content

[0003] In view of the existing problems, the utility model provides a large-size COG liquid crystal display screen, which can effectively solve the problems raised in the background technology.

[0004] In order to solve the above problems, the utility model adopts the following technical solutions:

[0005] A large-size COG liquid crystal display screen comprises a COG liquid crystal screen, a circuit board, a backlight chassis and a pressing frame. The COG liquid crystal screen is placed on the front of the backlight chassis, the pressing frame is buckled with the backlight chassis, an FPC is connected to the COG liquid crystal screen, the FPC is electrically connected to the circuit board, first fasteners are provided on both sides of the backlight chassis, the circuit board is placed on the back side of the backlight chassis and the sides are fixed by the first fasteners.

[0006] As a further solution of the utility model: a receiving groove is provided on the backlight chassis, and the COG liquid crystal screen is placed in the receiving groove.

[0007] As a further solution of the utility model: a plurality of insertion holes are provided on the periphery of the backlight chassis, a plurality of insertion posts are provided on the bottom surface of the pressure frame, the insertion posts correspond to the insertion holes one by one and the insertion posts and the insertion holes are interference fit.

[0008] As a further solution of the utility model: a notch is provided on the backlight chassis, and the notch is arranged corresponding to the position of the FPC.

[0009] As a further solution of the utility model: a supporting grid is provided on the back side of the backlight chassis.

[0010] As a further solution of the utility model: the back side of the backlight chassis is provided with positioning columns distributed in a matrix, and the circuit board is provided with matching positioning holes.

[0011] As a further solution of the utility model: the first clamping member includes a first supporting arm, and the first supporting arm is provided with an inner clamping head facing the circuit board and an outer clamping head facing the outside.

[0012] As a further solution of the utility model: end plates are provided at both ends of the back side of the backlight chassis, second support arms are provided on both sides of the end plates, and end clamps facing outwards are provided on the second support arms.

[0013] Compared with the prior art, the beneficial effects of the present invention are as follows: the present invention adopts a backlight chassis to support the COG LCD screen, and fixes the COG LCD screen through a pressing frame, and fixes the circuit board to the back side of the backlight chassis through a first snap fastener, which is convenient for installation and fixation, and the backlight chassis supports and installs the COG LCD screen to ensure the installation stability of the COG LCD screen, is suitable for large-size COG LCD screens, and can meet the customer's usage scenarios. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 A perspective 3D schematic diagram of the overall structure of a large-size COG liquid crystal display;

[0015] Figure 2 A three-dimensional schematic diagram of the overall structure of a large-size COG liquid crystal display screen from another perspective;

[0016] Figure 3 for Figure 1 Schematic diagram of the decomposition of

[0017] Figure 4 for Figure 2 Schematic diagram of the decomposition of

[0018] Figure 5 A schematic diagram of the back side of a backlight chassis in a large-size COG liquid crystal display;

[0019] Figure 6 for Figure 5 The enlarged schematic diagram at A in the middle;

[0020] Figure 7 for Figure 5 Enlarged schematic diagram of point B in the middle.

[0021] In the figure: 1. COG LCD screen; 2. Circuit board; 3. Backlight chassis; 4. Press frame; 5. Receiving groove; 6. FPC; 7. First fastener; 71. First support arm; 72. Inner clamp; 73. Outer clamp; 8. Socket; 9. Plug column; 10. Notch; 11. Support grid; 12. Positioning column; 13. End plate; 14. Second support arm; 15. End clamp. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] Combination Figures 1 to 7 The present embodiment is described. The present embodiment provides a large-size COG liquid crystal display screen, which includes a COG liquid crystal screen 1, a circuit board 2, a backlight chassis 3 and a pressing frame 4. A receiving groove 5 is provided on the front of the backlight chassis 3. The COG liquid crystal screen 1 is placed in the receiving groove 5 for positioning the COG liquid crystal screen 1. A backlight module (not shown in the figure) is provided at the bottom of the receiving groove 5. The backlight module includes a light guide plate, a reflective sheet, a light source, etc. The backlight module part is the prior art. After the COG liquid crystal screen 1 is placed on the backlight chassis 3, the pressing frame 4 is buckled on the backlight chassis 3, so as to crimp and fix the COG liquid crystal screen 1. After the COG liquid crystal screen 1 is fixed, sealant is applied along the four sides of the COG liquid crystal screen 1. FPC 6 is connected to the COG liquid crystal screen 1. FPC 6 is electrically connected to the circuit board 2. First fasteners 7 are provided on both sides of the backlight chassis 3. The circuit board 2 is placed on the back side of the backlight chassis 3 and the side edges are fixed by the first fasteners 7.

[0024] like Figure 3 , 4 As shown, a plurality of insertion holes 8 are provided on the periphery of the backlight chassis 3, and a plurality of insertion posts 9 are provided on the bottom surface of the pressing frame 4. The insertion posts 9 correspond to the insertion holes 8 one by one and the insertion posts 9 and the insertion holes 8 have an interference fit, so as to fix the pressing frame 4 and the backlight chassis 3.

[0025] A notch 10 is provided on the backlight chassis 3, and the notch 10 is arranged corresponding to the position of the FPC 6, so as to facilitate the lead-out of the FPC 6 and plugging it into the back side circuit board 2. A support grid 11 is provided on the back side of the backlight chassis 3 to improve the heat dissipation efficiency and effect. A matrix-distributed positioning column 12 is provided on the back side of the backlight chassis 3, and matching positioning holes are provided on the circuit board 2 for positioning and installing the circuit board 2 to prevent the circuit board 2 from shifting sideways.

[0026] like Figure 5-7As shown, four first clamping members 7 are provided, two of which are provided on each side of the backlight chassis 3. The first clamping member 7 comprises a first support arm 71, on which an inner clamping head 72 facing the circuit board 2 and an outer clamping head 73 facing outward are provided. The inner clamping head 72 is used to press and fix the circuit board 2, and the outer clamping head 73 is used to clamp with the shell, thereby fixing the middle side of the backlight chassis 3. In addition, end plates 13 are provided at both ends of the back side of the backlight chassis 3, and second support arms 14 are provided on both sides of the end plates 13. The second support arms 14 are provided with end clamps 15 facing outward, and the end clamps 15 are used to clamp with both ends of the shell, thereby fixing both ends of the backlight chassis 3.

[0027] The working principle of the utility model is: placing the COG liquid crystal screen 1 in the accommodating groove 5 of the backlight chassis 3, plugging the plugging column 9 on the pressing frame 4 with the plugging hole 8 on the backlight chassis 3, thereby crimping and fixing the COG liquid crystal screen 1, plugging the positioning hole on the circuit board 2 with the positioning column 12, plugging the circuit board 2, and at the same time, the inner clamping head 72 on the first clamping member 7 is crimped and fixed to the circuit board 2, and then the FPC6 on the COG liquid crystal screen 1 is plugged with the circuit board 2, and when fixing the large-size COG liquid crystal display screen, the outer clamping head 73 on the first clamping member 7 and the end clamping head 15 on the second supporting arm 14 are fixed to the outer shell, so as to install and fix the large-size COG liquid crystal display screen, and the installation is convenient and quick, and the backlight chassis 3 supports and installs the COG liquid crystal screen 1, thereby ensuring the installation stability of the COG liquid crystal screen 1, and is suitable for large-size COG liquid crystal displays and can meet the customer's usage scenarios.

[0028] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or apparatus that includes a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or apparatus.

[0029] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A large-size COG liquid crystal display screen, comprising a COG liquid crystal screen, a circuit board, a backlight chassis and a pressing frame, wherein the COG liquid crystal screen is placed on the front of the backlight chassis, the pressing frame is buckled with the backlight chassis, an FPC is connected to the COG liquid crystal screen, the FPC is electrically connected to the circuit board, first fasteners are provided on both sides of the backlight chassis, the circuit board is placed on the back side of the backlight chassis and the sides are fixed by the first fasteners.

2. A large-size COG liquid crystal display according to claim 1, characterized in that: The backlight chassis is provided with a receiving groove, and the COG liquid crystal screen is placed in the receiving groove.

3. The large-size COG liquid crystal display according to claim 1, characterized in that: A plurality of insertion holes are provided on the periphery of the backlight chassis, and a plurality of insertion posts are provided on the bottom surface of the pressing frame. The insertion posts correspond to the insertion holes one by one and the insertion posts and the insertion holes are interference fit.

4. The large-size COG liquid crystal display according to claim 1, characterized in that: The backlight chassis is provided with a notch, and the notch is arranged corresponding to the position of the FPC.

5. The large-size COG liquid crystal display according to claim 1, characterized in that: A supporting grid is arranged on the back side of the backlight chassis.

6. The large-size COG liquid crystal display according to claim 1, characterized in that: The back side of the backlight chassis is provided with positioning columns distributed in a matrix, and the circuit board is provided with matching positioning holes.

7. The large-size COG liquid crystal display according to claim 1, characterized in that: The first clamping member comprises a first supporting arm, and the first supporting arm is provided with an inner clamping head facing the circuit board and an outer clamping head facing outward.

8. The large-size COG liquid crystal display according to claim 1, characterized in that: End plates are arranged at two ends of the back side of the backlight chassis, second support arms are arranged on both sides of the end plates, and end clamps facing outwards are arranged on the second support arms.

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