CN214311208U - Backlight module, liquid crystal display screen and terminal equipment - Google Patents

Abstract

The utility model discloses a backlight unit, liquid crystal display and terminal equipment relates to display device technical field. The backlight module comprises a back plate, a middle frame, a diffusion plate and an optical diaphragm, wherein the optical diaphragm and the diffusion plate are arranged in a reserved gap between the middle frame and the back plate, folded edges are arranged on the periphery of the optical diaphragm, a clamping groove is formed in the side face, close to the optical diaphragm, of the middle frame, and the folded edges can be clamped in the clamping groove. In the backlight module provided by the utility model, the edge folds are arranged around the optical diaphragm, the clamping groove is arranged at one side of the middle frame close to the optical diaphragm, the edge folds can be clamped in the clamping groove, the movable space of the optical diaphragm in the horizontal direction and the vertical direction is limited through the matching of the edge folds and the clamping groove, and the reliability of the backlight module structure is improved; the gap is prevented from being filled by foam rubber, the cost is saved, and the production efficiency is improved.

Description

Backlight module, liquid crystal display screen and terminal equipment

Technical Field

The utility model relates to a display device technical field especially relates to a backlight unit, liquid crystal display and terminal equipment.

Background

Backlight unit among the display device mainly contains light guide plate, optics diaphragm, LED light source subassembly, backplate and center etc. need to guarantee in the module structure that each spare part normally assembles, especially optics diaphragm need reserve the inflation space according to its physical characteristic, also need guarantee its reliability after assembling simultaneously.

As shown in fig. 1, in a conventional direct-type backlight module, a diffuser plate 3 'and an optical film 2' are placed in a reserved gap between a back plate 5 'and a middle frame 1', and a direct-type backlight module is often compatible with various optical schemes, so that thicknesses of the diffuser plate 3 'and the optical film 2' are variable, a gap is filled by attaching a foam rubber strip 6 'to the lower surface of the periphery of the middle frame 1', and the phenomenon that the optical film 2 'jumps out due to an excessively large moving gap to scratch a liquid crystal panel 4' is avoided. This traditional design scheme operation degree of difficulty is big, extravagant man-hour, can lead to optics diaphragm 2' warp moreover because of the clearance undersize.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a backlight module, a liquid crystal display screen and a terminal device, wherein the backlight module does not need auxiliary materials to fill gaps, thereby saving the cost; and the fixation of the optical film and the middle frame is more reliable.

To achieve the purpose, the utility model adopts the following technical proposal:

a backlight module comprises a back plate, a middle frame, a diffusion plate and an optical membrane, wherein the optical membrane and the diffusion plate are arranged in a reserved gap between the middle frame and the back plate, folded edges are arranged on the periphery of the optical membrane, a clamping groove is formed in the side face, close to the optical membrane, of the middle frame, and the folded edges can be clamped in the clamping groove.

Optionally, the periphery of the optical film is provided with a crease line, and the crease line is folded towards a direction close to the liquid crystal panel to be perpendicular to the folded edge of the optical film.

Optionally, the height of the folded edge extending into the clamping groove is H1, and H1 is more than or equal to 3 mm.

Optionally, the height of the clamping groove is H, and H is larger than or equal to 3mm and smaller than or equal to 5 mm.

Optionally, the width of the clamping groove is L, and L is larger than or equal to 0.3mm and smaller than or equal to 0.5 mm.

Optionally, the optical film comprises a multi-layer film, and the crease line is arranged on the film on the top layer.

A liquid crystal display screen comprises a liquid crystal panel and the backlight module, wherein the liquid crystal panel is arranged on the front face of the backlight module and is fixedly connected with a middle frame.

Optionally, a projection of the effective display area of the liquid crystal panel is located in the crease line of the optical film, and a set gap is formed between an edge of the projection of the effective display area of the liquid crystal panel and the crease line.

Optionally, the width of the set gap is A, and A is larger than or equal to 1 mm.

A terminal device comprises the liquid crystal display screen.

The utility model has the advantages that:

the utility model provides a backlight module, liquid crystal display and display device, in backlight module, set up the hem around the optics diaphragm, one side that the center is close to the optics diaphragm sets up the draw-in groove, the hem can joint in the draw-in groove, through the cooperation of hem and draw-in groove, restricts the activity space of optics diaphragm horizontal direction and vertical direction, has promoted the reliability of backlight module structure; the gap is prevented from being filled by foam rubber, the cost is saved, and the production efficiency is improved.

Drawings

FIG. 1 is a schematic diagram of a prior art LCD panel;

fig. 2 is a schematic structural diagram of a liquid crystal display screen according to an embodiment of the present invention;

fig. 3 is a schematic structural diagram of an optical film and a projection of the optical film with an effective display area of a liquid crystal panel according to an embodiment of the present invention;

fig. 4 is a schematic structural diagram of a middle frame according to an embodiment of the present invention.

In the figure:

1', a middle frame; 2', an optical film; 3', a diffuser plate; 4', a liquid crystal panel; 5', a back plate; 6' foam rubber strip;

1. a middle frame; 2. an optical film; 3. a diffusion plate; 4. a liquid crystal panel; 5. a back plate;

11. a card slot; 21. a first layer of membrane; 22. a second layer of membrane; 41. projection of the effective display area;

211. a crease line; 212. and (7) folding edges.

Detailed Description

In order to make the technical problem solved by the present invention, the technical solution adopted by the present invention and the technical effect achieved by the present invention clearer, the technical solution of the present invention will be further explained by combining the drawings and by means of the specific implementation manner.

In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, detachably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "right", and the like are used in the orientation or positional relationship shown in the drawings only for convenience of description and simplicity of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to have a special meaning.

As shown in fig. 2, the present embodiment provides a backlight module, which includes a back plate 5, a middle frame 1, a diffusion plate 3, and an optical film 2, wherein the optical film 2 and the diffusion plate 3 are disposed in a reserved gap between the middle frame 1 and the back plate 5, a folded edge 212 is disposed around the optical film 2, a clamping groove 11 is disposed on a side surface of the middle frame 1 close to the optical film 2, and the folded edge 212 can be clamped in the clamping groove 11.

In the backlight unit that this embodiment provided, optical film 2 sets up hem 212 all around, and one side that center 1 is close to optical film 2 sets up draw-in groove 11, and hem 212 can the joint in draw-in groove 11, through hem 212 and draw-in groove 11's cooperation, restricts the activity space of 2 horizontal directions of optical film and vertical direction, has promoted the reliability of backlight unit structure, has avoided through the cotton adhesive tape packing gap of bubble, has practiced thrift the cost, has improved production efficiency.

Alternatively, as shown in fig. 3, the optical film 2 is provided with a folding line 211 on the periphery thereof, and is folded along the folding line 211 in a direction close to the liquid crystal panel 4 so as to be perpendicular to the folding edge 212 of the optical film 2. In the present embodiment, the crease line 211 is embossed at a predetermined distance from the edge around the optical film 2, and when the backlight module is assembled, the embossed crease line 211 is folded in a direction close to the liquid crystal panel 4 to form the folded edge 212. The position of the clamping groove 11 on the side surface of the middle frame 1 corresponds to the position of the folding edge 212, so that the folding edge 212 is clamped in the clamping groove 11 of the middle frame 1. The setting distance needs to be specifically set according to the thicknesses of the diffusion plate 3 and the optical diaphragm 2 and the reserved gap between the back plate 5 and the middle frame 1, and only the folding edge 212 needs to be clamped in the clamping groove 11 and can not be moved out of the clamping groove 11, so that the horizontal direction and the vertical direction of the optical diaphragm 2 can be effectively limited.

Optionally, the optical film 2 comprises a multi-layer film, and the film on the top layer is provided with a crease line 211. In the present embodiment, the optical film 2 includes a first film 21 and a second film 22, the first film 21 is disposed near the center frame 1, and the second film 22 is disposed between the first film 21 and the diffusion plate 3. Only the first layer film 21 is required to be provided with the crease lines 211 at the periphery thereof, so that the first layer film 21 is provided with the crease lines 212, the moving space of the first layer film 21 in the horizontal direction and the vertical direction is limited, and the second layer film 22 and the diffusion plate 33 can only move between the first layer film 21 and the back plate 5, and cannot jump out of the middle frame 1 to scratch the liquid crystal panel 4.

Optionally, the height of the folded edge 212 extending into the slot 11 is H1, H1 is more than or equal to 3 mm. In this embodiment, in order to ensure the reliability of the structure, the height of the folded edge 212 of the optical film 2 extending into the slot 11 needs to be greater than or equal to 3 mm; through the limit structure formed by the optical diaphragm 2 and the clamping groove 11, the moving space of the optical diaphragm 2 can be limited in the horizontal direction and the vertical direction, and the reliability of the backlight module structure is improved.

Optionally, as shown in fig. 4, the width of the slot 11 is L, and L is greater than or equal to 0.3mm and less than or equal to 0.5 mm. In the present embodiment, the thickness of the single optical film 2 is 0.2mm to 0.3 mm. The limit can be realized only by ensuring that the folded edge 212 of the optical diaphragm 2 is positioned in the clamping groove 11.

Preferably, the height of the clamping groove 11 is H, and H is more than or equal to 3mm and less than or equal to 5 mm. In this embodiment, the height of the slot 11 is set within 3mm to 5mm by comprehensively considering the reserved gap between the back plate 5 and the middle frame 1 and the reliability of the backlight module structure.

The embodiment further provides a liquid crystal display screen, which comprises a liquid crystal panel 4 and the backlight module. The liquid crystal panel 4 is installed on the front surface of the backlight module and is fixedly connected with the middle frame 1.

Alternatively, as shown in fig. 3, the projection 41 of the effective display area of the liquid crystal panel 4 is located within the folding line 211, and the edge of the projection 41 of the effective display area has a set gap with the folding line 211. Specifically, the width of the gap is set to be A, and A is larger than or equal to 1 mm.

The liquid crystal panel 4 includes an effective display area which is a total area where characters and graphics can be displayed, and a black edge area for connection of various circuits. The projection 41 of the effective display area of the liquid crystal panel 4 is disposed within the fold line 211 to ensure the display effect of the liquid crystal panel 4. In this embodiment, the minimum gap is set to 1mm to prevent the edge of the middle frame 1 from blocking the light source reflected by the optical film 2.

The embodiment also provides terminal equipment which comprises the liquid crystal display screen. The terminal device can be a device with an image display function, such as a liquid crystal television, a computer or an advertising machine.

The above description is only for the preferred embodiment of the present invention, and for those skilled in the art, there are variations on the detailed description and the application scope according to the idea of the present invention, and the content of the description should not be construed as a limitation to the present invention.

Claims (10)

1. The utility model provides a backlight module, its includes backplate (5), center (1), diffuser plate (3) and optics diaphragm (2), optics diaphragm (2) with diffuser plate (3) set up in center (1) with in the reserve clearance between backplate (5), its characterized in that, be provided with hem (212) around optics diaphragm (2), be close to on center (1) the side of optics diaphragm (2) is provided with draw-in groove (11), hem (212) can the joint in draw-in groove (11).

2. The backlight module according to claim 1, wherein the optical film (2) is provided with a folding line (211) at its periphery, and the folding line (211) is folded in a direction approaching the liquid crystal panel (4) to be perpendicular to the folding edge (212) of the optical film (2).

3. The backlight module as claimed in claim 1, wherein the height of the folded edge (212) extending into the slot (11) is H1, H1 is 3mm or more.

4. The backlight module as claimed in claim 3, wherein the height of the slot (11) is H, 3mm ≤ H ≤ 5 mm.

5. The backlight module as claimed in claim 3, wherein the width of the slot (11) is L, and L is greater than or equal to 0.3mm and less than or equal to 0.5 mm.

6. The backlight module according to claim 2, wherein the optical film (2) comprises a multi-layer film, and the crease lines (211) are arranged on the film on the top layer.

7. A liquid crystal display screen, characterized in that, comprises a liquid crystal panel (4) and a backlight module set as claimed in any one of claims 1-6, the liquid crystal panel (4) is installed on the front face of the backlight module set and is fixedly connected with the middle frame (1).

8. The lcd panel according to claim 7, wherein the projection (41) of the effective display area of the lcd panel (4) is located within the crease line (211) of the optical film (2), and the edge of the projection (41) of the effective display area has a set gap with the crease line (211).

9. The liquid crystal display panel according to claim 8, wherein the set gap has a width A of 1mm or more.

10. A terminal device characterized by comprising a liquid crystal display according to any one of claims 7 to 9.

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