CN210109525U

CN210109525U - Backlight module and liquid crystal display device

Info

Publication number: CN210109525U
Application number: CN201921146025.7U
Authority: CN
Inventors: 王影; 金莹; 徐小康
Original assignee: Shenzhen Techaser Technologies Co Ltd
Current assignee: Shenzhen Techaser Technologies Co Ltd
Priority date: 2019-07-22
Filing date: 2019-07-22
Publication date: 2020-02-21
Anticipated expiration: 2029-07-22

Abstract

A backlight module and a liquid crystal display device comprise a frame body, shading glue, an FPC board, a diffusion sheet, an LED lamp and a light guide plate, wherein the LED lamp and the light guide plate are arranged below the diffusion sheet; the LED lamp is characterized in that an FPC board is welded below the LED lamp, diffusion black strips are pasted on a light emitting surface of a light inlet of the diffusion sheet, the diffusion sheet extends towards the direction of the frame body, and the diffusion sheet is lapped on the LED lamp through a pasting layer. The utility model has the advantages that: the bonding layer is added below the diffusion sheet, so that the diffusion sheet is effectively fixed on the LED, and the structure can reduce the debugging period and the assembling difficulty of an optical engineer on the backlight module; the distance from the LED light-emitting surface to the VA area can be shortened without generating light spots and light leakage phenomena, and meanwhile, the phenomenon that the diffusion sheet is brought up to generate light spots and other adverse phenomena when a backlight module is assembled or a reliability experiment is carried out is avoided, so that the production cost is reduced, and the product yield is improved.

Description

Backlight module and liquid crystal display device

Technical Field

The utility model belongs to the technical field of the backlight technique and specifically relates to a backlight module and liquid crystal display device are related to.

Background

Along with intelligent terminal's popularization, ultra-thin, high bright, the application demand of full screen is constantly rising, also is higher and higher to requirements such as backlight unit quality, luminance, consequently, promotes backlight unit quality, stability etc. and has very positive influence to backlight unit future development. Among the prior art, the light source of using LED lamp strip as backlight unit extensively, backlight unit from the top down includes in proper order: the backlight module is provided with an FPC board and an LED lamp at a light inlet end, and the FPC board and the LED lamp are reversely arranged on the back of the LED in order to meet the requirements of high brightness and narrow frames.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving the defects existing in the prior art and providing a backlight module and a liquid crystal display device.

The purpose of the utility model is realized through the following technical scheme: a backlight module comprises a frame body, shading glue, an FPC board, a diffusion sheet, an LED lamp and a light guide plate, wherein the LED lamp and the light guide plate are arranged below the diffusion sheet; the LED lamp is characterized in that an FPC board is welded below the LED lamp, diffusion black strips are pasted on a light emitting surface of a light inlet of the diffusion sheet, the diffusion sheet extends towards the direction of the frame body, and the diffusion sheet is lapped on the LED lamp through a pasting layer.

Further, the adhesive layer occupies part of the area of the upper surface of the LED lamp.

Furthermore, the adhesive layer covers the upper surface of the LED lamp.

Furthermore, the material of the sticking layer is double faced adhesive tape.

Furthermore, one surface of the diffusion sheet facing the frame body is flush with one surface of the diffusion black strips facing the frame body.

Further, the length of the diffusion sheet lapped on the LED lamp is 0.35 mm-0.85 mm.

Furthermore, the frame body is of a rubber frame, a metal frame or a rubber-iron integrated frame structure.

Furthermore, the upper surface of the light guide plate and the upper surface of the LED lamp are positioned on the same horizontal plane.

A liquid crystal display device comprises a liquid crystal panel and is characterized by further comprising the backlight module, wherein the liquid crystal panel is arranged on the backlight module.

The utility model discloses the beneficial effect who brings: the bonding layer is added below the diffusion sheet, so that the diffusion sheet is effectively fixed on the LED, and the structure can reduce the debugging period and the assembling difficulty of an optical engineer on the backlight module; the distance from the LED light-emitting surface to the V.A area can be shortened without generating light spots and light leakage, and meanwhile, the poor phenomena that the diffusion sheet is brought up to generate the light spots and the like during assembling of the backlight module or reliability experiment are avoided, so that the production cost is reduced, and the product yield is improved.

Drawings

Fig. 1 is a schematic cross-sectional view of a backlight module according to an embodiment of the present invention.

Detailed Description

Reference will now be made in detail to embodiments of the present application, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present application and should not be construed as limiting the present application.

As shown in fig. 1, a backlight module includes a frame 10, a light-shielding adhesive 20, an FPC board 30, a diffusion sheet 40, an LED lamp 60 disposed below the diffusion sheet 40, and a light guide plate 50, and is characterized in that; the FPC board 30 is welded below the LED lamp 60, the diffusion black stripes 42 are adhered on the light-emitting surface of the light inlet of the diffusion sheet 40, the diffusion sheet 40 extends towards the frame 10, and the diffusion sheet is connected to the LED lamp 60 in a lap joint mode through the adhesive layer 41.

Further, the adhesive layer 41 occupies a part of the upper surface area of the LED lamp 60.

Further, the adhesive layer 41 covers the upper surface of the LED lamp 60.

Further, the material of the adhesive layer 41 is a double-sided tape.

Further, the diffusion sheet 40 is flush with the diffusion black stripes on the surface facing the frame 10, on the surface facing the frame 10.

Further, the length of the diffusion sheet 40 lapped on the LED lamp 60 is 0.35 mm to 0.85 mm.

Further, the frame body 10 is a rubber frame, a metal frame or a rubber-iron integrated frame structure.

Further, the upper surface of the light guide plate 50 and the upper surface of the LED lamp 60 are located at the same horizontal plane.

The utility model adds the adhesive layer attached to the LED lamp below the diffusion sheet, so that the diffusion sheet is effectively fixed on the LED lamp, and the structure can reduce the debugging period and the assembling difficulty of an optical engineer on the backlight module; the distance from the light emitting surface of the LED lamp to the VA area can be shortened without generating light spots and light leakage phenomena, and meanwhile, the phenomenon that the diffusion sheet is brought up to generate light spots and other adverse phenomena when a backlight module is assembled or a reliability experiment is carried out is avoided, so that the production cost is reduced, and the product yield is improved.

It will be appreciated by those skilled in the art that while the invention has been described in terms of several embodiments, not every embodiment may comprise a single embodiment, and such descriptions are merely for clarity of illustration and understanding, and the skilled artisan should understand the description as a whole and consider the embodiments as related to each other in a manner that allows them to be combined into different embodiments to understand the scope of the invention. The above description is only exemplary of the present invention, and is not intended to limit the scope of the present invention. Any equivalent changes, modifications and combinations that may be made by those skilled in the art without departing from the spirit and principles of the invention should be considered within the scope of the invention.

Claims

1. A backlight module comprises a frame body, shading glue, an FPC board, a diffusion sheet, an LED lamp and a light guide plate, wherein the LED lamp and the light guide plate are arranged below the diffusion sheet; the LED lamp is characterized in that an FPC board is welded below the LED lamp, diffusion black strips are pasted on a light emitting surface of a light inlet of the diffusion sheet, the diffusion sheet extends towards the direction of the frame body, and the diffusion sheet is lapped on the LED lamp through a pasting layer.

2. The backlight module as claimed in claim 1, wherein the adhesive layer occupies a portion of the surface area of the LED lamp.

3. The backlight module as claimed in claim 1, wherein the adhesive layer covers an upper surface of the LED lamp.

4. The backlight module as claimed in claim 1, wherein the adhesive layer is made of double-sided tape.

5. The backlight module as claimed in claim 1, wherein the diffusion sheet is flush with the diffusion black stripes on a surface facing the frame.

6. The backlight module as claimed in claim 1, wherein the diffusion sheet is overlapped on the LED lamp to a length of 0.35 mm to 0.85 mm.

7. The backlight module as claimed in claim 1, wherein the frame body is a plastic frame, a metal frame or a plastic-iron frame.

8. The backlight module as claimed in claim 1, wherein the upper surface of the light guide plate and the upper surface of the LED lamp are located at the same level.

9. A liquid crystal display device comprising a liquid crystal panel, further comprising the backlight module according to any one of claims 1 to 8, wherein the liquid crystal panel is disposed on the backlight module.