Backlight module and liquid crystal display device

A technology of backlight module and light source, which is applied in the direction of lighting devices, fixed lighting devices, parts of lighting devices, etc. It can solve the problems of easy deviation of film materials, inconvenient assembly, and easy entry of foreign objects, so as to prevent film material from shifting Prevents entry of foreign matter, facilitates assembly, and improves brightness

Inactive Publication Date: 2014-07-09
WUHAN TIANMA MICRO ELECTRONICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the above-mentioned solution only involves the matching method of the membrane material and the frame, and there are disadvantages such as the membrane material is prone to offset, it is not easy to assemble, and it is easy for foreign matter to enter.

Method used

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  • Backlight module and liquid crystal display device
  • Backlight module and liquid crystal display device
  • Backlight module and liquid crystal display device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] The backlight module described in this embodiment includes a light source, a frame and a film material for converting the light source into a uniform surface light source, wherein the frame accommodates the light source and the film material. The surface of the film material used to guide light to exit is the light-emitting surface, the surface opposite to the light-emitting surface is the bottom surface, and the surface adjacent to the light source is the light-incident surface.

[0043] The film material is used to convert the light source into a uniform surface light source, and the film material may have slight differences according to different processes. The composition of the film material in this embodiment is as follows from bottom to top: reflective sheet, light guide plate, diffusion sheet, lower prism sheet, and upper prism sheet.

[0044] The frame accommodates the light source and the film material, and the light source can be located under the film materi...

Embodiment 2

[0052] This embodiment provides a direct-type backlight module. The surface of the film material used to guide light to exit is the light-emitting surface, the surface opposite to the light-emitting surface is the bottom surface, and the surface adjacent to the light source is the light-incoming surface. , then the bottom surface is the incident surface. Any one, two or three of the four sides may be in a stepped shape, or all four sides may be in a stepped shape.

[0053] The present embodiment and prior art progress are:

[0054] For the direct-type backlight module, in the film material, except for the four sides other than the light-emitting surface and the bottom surface, at least one of the other four sides intersecting the light-emitting surface has a stepped shape, and the stepped-shaped The side surfaces are sequentially expanded along the direction from the light-emitting surface to the bottom surface. Correspondingly, the side of the frame opposite to the stepped s...

Embodiment 3

[0072] This embodiment provides a side light type backlight module. The surface of the film material used to guide light to exit is the light-emitting surface, the surface opposite to the light-emitting surface is the bottom surface, and the surface adjacent to the light source is the light-incident surface. Any one of the three sides, two sides may be in a stepped shape, or all three sides may be in a stepped shape.

[0073] The present embodiment and prior art progress are:

[0074] For the side-light type backlight module, among the four sides of the film material except the light-emitting surface and the bottom surface, except for the surface receiving the light source, among the other three sides intersecting the light-emitting surface, there are at least One side is stepped, and the stepped side expands sequentially along the direction from the light-emitting surface to the bottom surface. Correspondingly, the side opposite to the stepped side of the film material in th...

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PUM

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Abstract

The invention discloses a backlight module and a liquid crystal display device. The backlight module comprises a light source, a frame and a membrane for transforming the light source into a uniform area light source. The light source and the membrane are accommodated in the frame, the face for guiding emission of light is a light emitting face, and the face opposite to the light emitting face is a bottom. At least one of the sides, which intersect with the light emitting face in the membrane, is step-shaped. The step-shaped sides expand outwards successively along the direction from the light emitting face to the bottom. Correspondingly, the sides opposite to the step-shaped sides of the membrane in the frame are in step shapes matched with the step shapes of the membrane. By means of the backlight module and the liquid crystal display device, the problem of peripheral light leakage and bright lines of traditional backlight module matched visual areas can be solved, and the brightness of the backlight module can be improved.

Description

technical field [0001] The present invention relates to the technical field of liquid crystal display, and more specifically, to a backlight module and a liquid crystal display device. Background technique [0002] With the development of electronic information technology, the application range of liquid crystal display is becoming more and more extensive. Liquid crystal displays have the advantages of low voltage, low power consumption, large amount of displayed information, and easy colorization, etc., and have been widely used in display devices of electronic equipment such as electronic computers, electronic notepads, mobile phones, cameras, and high-definition televisions. Different from cathode ray tube or plasma display device, it does not emit light itself, but achieves display purpose by modulating external light, that is, it relies on different reflection and transmission of external light to form different contrast to achieve display purpose. Since the liquid cry...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F21S8/00F21V13/00F21V17/10G02F1/13357
Inventor 陈江戴超周伟
Owner WUHAN TIANMA MICRO ELECTRONICS CO LTD
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