Structure for preventing light leakage and dislocation at suspension loop of liquid crystal module diaphragm

Abstract

The utility model provides a structure for preventing light leakage and dislocation at a suspension loop of a liquid crystal module diaphragm, which solves the technical problem that the existing liquid crystal module structure causes larger distance between a back plate and an optical diaphragm and light leakage due to production errors, and can be widely applied to the field of liquid crystal display modules. The liquid crystal display module specifically comprises a liquid crystal panel, a metal back plate is arranged on the back face of the liquid crystal panel, the periphery of the liquid crystal panel is wrapped by the side edges of the metal back plate, a plastic middle frame is arranged on the periphery of the metal back plate in a matched mode, the liquid crystal panel comprises an optical film and a light guide plate, and lugs are additionally arranged on the two bottom corners of the optical film; limiting pieces are arranged between the metal back plate and the liquid crystal panel and matched with the lugs, each limiting piece comprises a connecting transverse plate, a first clamping edge and a second clamping edge are arranged at the two ends of each connecting transverse plate, the first clamping edges are parallel to the connecting transverse plates, and the second clamping edges are perpendicular to the connecting transverse plates. And the distance between the first clamping edge and the second clamping edge is matched with the width of the lug.

Description

Technical Field

[0001] The utility model belongs to the technical field of liquid crystal display modules, and particularly relates to a structure for preventing light leakage and dislocation at a hanging ear of a liquid crystal module membrane. Background Art

[0002] The positioning method of the optical film in the existing narrow-frame or borderless LCD module is basically to limit the position by using the lugs and the folding grooves of the sheet metal back plate. The left and right and upper frames are made like this. Figure 1 The structure is carried out, the plane of the plastic middle frame is pressed and covered in the Z direction, and a light-shielding tape with an L-shaped cross-section is attached to the gap between the middle frame and the back plate for light shielding.

[0003] However, due to errors during production, the above structure may result in a larger distance between the back plate and the optical film, causing a light leakage problem. Utility Model Content

[0004] The utility model aims to solve the deficiencies of the above-mentioned technology and provide a structure for preventing light leakage and misalignment at the hanging ears of the liquid crystal module membrane.

[0005] To this end, the utility model provides a structure for preventing light leakage and dislocation at the hanging ears of a liquid crystal module diaphragm, comprising a liquid crystal panel, a metal back plate is arranged on the back of the liquid crystal panel, the side edges of the metal back plate wrap around the four sides of the liquid crystal panel, a plastic middle frame is arranged around the four sides of the metal back plate, the liquid crystal panel comprises an optical diaphragm and a light guide plate, and lugs are additionally arranged on the two bottom corners of the optical diaphragm; a limiting member is arranged between the metal back plate and the liquid crystal panel and cooperates with the lugs, the limiting member comprises a connecting horizontal plate, a first card edge and a second card edge are arranged at both ends of the connecting horizontal plate, the first card edge is arranged parallel to the connecting horizontal plate, the second card edge is arranged perpendicular to the connecting horizontal plate, and the distance between the first card edge and the second card edge is adapted to the width of the lug.

[0006] Furthermore, the plastic middle frame is provided with a first edge clamping groove and a second edge clamping groove which match with the limiting member and are used to limit the position of the limiting member.

[0007] Furthermore, OC adhesive strips are pasted on the four sides of the frame between the optical film and the plastic middle frame to cover the first card edge card slot.

[0008] Furthermore, a plurality of first and second bumps are arranged on the side frame of the metal back plate, and a first and second bump slots matching with the first and second bumps are opened on the inner frame of the plastic middle frame for limiting the installation of the plastic middle frame on the metal back plate.

[0009] Furthermore, a plurality of U-shaped COF boards are provided on the lower frame of the plastic middle frame, and the lower frame of the plastic middle frame is located inside the U-shaped space of the COF board, thereby reducing the space occupied by the COF board.

[0010] The utility model provides a structure for preventing light leakage and misalignment at the hanging ears of a liquid crystal module membrane, which has the following beneficial effects:

[0011] 1. Effectively improve the positioning strength of the diaphragm and avoid displacement of the diaphragm in the backlight module;

[0012] 2. This structure indirectly plays the role of pre-positioning the middle frame and the back panel, and has dual functions;

[0013] 3. When observing the product from the back, the light leakage problem between the middle frame and the back panel can be effectively avoided;

[0014] 4. The slot on the front of the middle frame is just below the OC glue, which also prevents light from showing through the front. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the prior art;

[0016] Figure 2 It is a structural diagram of the front side of the utility model;

[0017] Figure 3 It is a structural diagram on the back of the utility model;

[0018] Figure 4 This is a structural diagram of the lower right corner of the front side of the utility model after removing the plastic middle frame;

[0019] Figure 5 It is a structural diagram of the lower left corner of the back of the plastic middle frame of the utility model;

[0020] Figure 6 It is a structural diagram of the limiter of the utility model;

[0021] Markings in the figure: 1. LCD panel; 2. Plastic middle frame; 3. Metal back plate; 4. Optical film; 5. Light guide plate; 6. Lug; 7. Limiting piece; 8. OC rubber strip; 9. First card edge; 10. Second card edge; 11. Connecting cross plate; 12. First card edge slot; 13. Second card edge slot; 14. COF board; 15. First bump; 16. Second bump; 17. First bump slot; 18. Second bump slot. DETAILED DESCRIPTION

[0022] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments to help understand the content of the present invention. The methods used in the present invention are all conventional methods unless otherwise specified; the raw materials and devices used are all conventional commercial products unless otherwise specified.

[0023] like Figure 2As shown in FIG. 3 , the utility model provides a structure for preventing light leakage and misalignment at the hanging ears of the liquid crystal module film, comprising a liquid crystal panel 1, a metal back plate 3 is arranged on the back of the liquid crystal panel 1, the side of the metal back plate 3 wraps around the liquid crystal panel 1, and a plastic middle frame 2 is arranged around the metal back plate 3. The liquid crystal panel 1 comprises an optical film 4 and a light guide plate 5, and lugs 6 are additionally arranged on the two bottom corners of the optical film 4. A limiting member 7 is arranged between the metal back plate 3 and the liquid crystal panel 1 and cooperates with the lugs 6. The limiting member 7 comprises a connecting horizontal plate 11, and a first card edge 9 and a second card edge 10 are arranged at both ends of the connecting horizontal plate 11. The first card edge 9 is arranged parallel to the connecting horizontal plate 11, and the second card edge 10 is arranged perpendicular to the connecting horizontal plate 11. The distance between the first card edge 9 and the second card edge 10 is adapted to the width of the lug 6. The second clamping edge 10 is arranged perpendicular to the connecting horizontal plate 11, firstly because it is located at the corner of the metal back plate 3, and the space is large; secondly, the contact area between the second clamping edge 10 and the lug 6 is increased, the pressure is reduced, and the service life of the optical film 4 is extended. The plastic middle frame 2 is provided with a first clamping edge slot 12 and a second clamping edge slot 13 that match the limiter 7 and are used to limit the position of the limiter 7.

[0024] like Figure 6 As shown, in one embodiment, the stopper 7 is an additional structure, which is inserted between the metal back plate 3 and the optical film 4 during the assembly process of the liquid crystal module. In another embodiment, the stopper 7 is a part of the metal back plate 3, which is formed by folding the material of the metal back plate 3 outward during the production process of the metal back plate 3.

[0025] like Figure 4 As shown, OC strips 8 are pasted on the four sides of the frame between the optical film 4 and the plastic middle frame 2. The OC strips 8 on the left and right sides can just cover the first card edge slot 12 to avoid light leakage from the front due to the opening of the first card edge slot 12; and the second card edge slot 13 can be covered by the front cover of the whole machine installed under the plastic middle frame 2 later.

[0026] like Figure 4 5, a plurality of first protrusions 15 and second protrusions 16 are arranged on the side frame of the metal back plate 3, and a first protrusion card slot 17 and a second protrusion card slot 18 matching with the first protrusions 15 and the second protrusions 16 are opened on the inner side frame of the plastic middle frame 2, which are used to limit the position of the plastic middle frame 2 when it is installed on the metal back plate 3. A plurality of U-shaped COF boards 14 are also arranged on the lower frame of the plastic middle frame 2, and the lower frame of the plastic middle frame 2 is located inside the U-shaped space of the COF board 14, so as to reduce the space occupied by the COF board 14.

[0027] In the description of the present invention, it should be understood that the terms "left", "right", "up", "down", "top", "bottom", "front", "back", "inside", "outside", "back", "middle", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0028] However, what is described above is only a specific embodiment of the present invention and should not be used to limit the scope of implementation of the present invention. Therefore, the replacement of equivalent components, or equivalent changes and modifications made according to the scope of protection of the patent of the present invention should still fall within the scope covered by the claims of the present invention.

Claims

1. A structure for preventing light leakage and misalignment at the hanging ears of a liquid crystal module film, comprising a liquid crystal panel, a metal back plate is arranged on the back of the liquid crystal panel, the side of the metal back plate wraps around the liquid crystal panel, and a plastic middle frame is arranged around the metal back plate, characterized in that: The liquid crystal panel includes an optical film and a light guide plate, and lugs are additionally arranged on the two bottom corners of the optical film; a limiter is arranged between the metal back plate and the liquid crystal panel and cooperates with the lugs, and the limiter includes a connecting horizontal plate, and a first card edge and a second card edge are arranged at both ends of the connecting horizontal plate, the first card edge is arranged parallel to the connecting horizontal plate, and the second card edge is arranged perpendicular to the connecting horizontal plate, and the distance between the first card edge and the second card edge is adapted to the width of the lug.

2. The structure for preventing light leakage and misalignment at the hanging ears of a liquid crystal module according to claim 1, characterized in that: The plastic middle frame is provided with a first edge clamping slot and a second edge clamping slot matched with the limiting member, and used for limiting the position of the limiting member.

3. The structure for preventing light leakage and misalignment at the hanging ears of a liquid crystal module according to claim 2, characterized in that: OC adhesive strips are attached to the four sides of the frame between the optical film and the plastic middle frame to cover the first card edge slot.

4. A structure for preventing light leakage and dislocation at the hanging ears of a liquid crystal module according to any one of claims 1 to 3, characterized in that: A plurality of first and second bumps are arranged on the side frame of the metal back plate, and a first and second bump slots matching with the first and second bumps are opened on the inner frame of the plastic middle frame for limiting the position of the plastic middle frame when it is installed on the metal back plate.

5. The structure for preventing light leakage and misalignment at the hanging ears of a liquid crystal module according to claim 4, characterized in that: The lower frame of the plastic middle frame is further provided with a plurality of U-shaped COF boards, and the lower frame of the plastic middle frame is located inside the U-shaped space of the COF board, thereby reducing the space occupied by the COF board.

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