Composite brightness enhancement film and backlight module

A technology of backlight module and brightness enhancement film, applied in the field of optical film, can solve the problems of high thickness of backlight module and complicated assembly process, and achieve the effect of low thickness, good uniformity and reduced thickness

Active Publication Date: 2017-06-30
NINGBO CHANGYANG TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problems of high thickness and complicated assembly process of the existing backlight module, the present invention provides a composite brightness enhancement film and a backlight module

Method used

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  • Composite brightness enhancement film and backlight module

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] In the composite brightness enhancing film provided by the present invention, the composite film sequentially includes a first prism film, a first adhesive layer, a second prism film, a second adhesive layer, and a third prism film; the first prism film includes a first A prism layer and a first PET substrate layer; the second prism film comprises a second prism layer and a second PET substrate layer; the third prism film comprises a third prism layer, a third PET substrate layer and a backcoat; The first PET substrate layer is bonded together with the second prism layer through the first bonding layer, and the second PET substrate layer is bonded together with the third prism layer through the second bonding layer; A prism layer is made up of some first prism bars; the second prism layer is made up of some second prism bars; the third prism layer is made up of some third prism bars and some diffusion areas, and the third prism bars and the diffusion areas alternate arr...

Embodiment 2

[0061] Composite brightness enhancing film as provided in embodiment 1, wherein,

[0062] The thickness of the first PET substrate layer is 50 μm, the thickness of the second PET substrate layer is 50 μm, the thickness of the third PET substrate layer is 50 μm, and the thickness of the back coating is 15-18 μm.

[0063] The prism width of the first prism bar and the second prism bar is 44 μm.

[0064] The prism width of the third prism bar was 75 μm. The width of the diffusion region was 200 μm.

[0065] The protruding structure is a circular protruding structure, the diameter of the circular protruding structure is 5-40 μm, and the height is 1-6 μm.

[0066] The content of the adhesive in the back coat is 85%, and the content of PMMA and PBMA is 7.5%, respectively. The particle size of the organic particles is 600nm-900nm.

Embodiment 3

[0068] Composite brightness enhancing film as provided in embodiment 1, wherein,

[0069] The thickness of the first PET substrate layer is 50 μm, the thickness of the second PET substrate layer is 50 μm, the thickness of the third PET substrate layer is 50 μm, and the thickness of the back coating is 15-18 μm.

[0070] The prism width of the first prism strip and the second prism strip is 50 μm.

[0071] The prism width of the third prism bar was 75 μm, and the width of the diffusion region was 200 μm.

[0072] The protruding structure is a circular protruding structure, the diameter of the circular protruding structure is 5-10 μm, and the height is 1-6 μm.

[0073] The content of the adhesive in the back coat is 85%, and the content of PMMA and PBMA is 7.5%, respectively.

[0074] The particle size of the organic particles is 1 μm-10 μm.

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Abstract

The invention relates to the technical field of optical films, and especially relates to a composite brightness enhancement film and a backlight module to solve problems that a conventional backlight module is high in thickness and assembling procedures are complicated. The composite film sequentially comprises a first prism film, a first bonding layer, a second prism film, a second bonding layer and a third prism film. The third prism film comprises a third prism layer, a third PET substrate layer and a back coating layer. The third prism layer is formed by a plurality of third prism strips and a plurality of diffusion regions, the third prism strips and the diffusion regions being arranged alternately. The composite brightness enhancement film has brightness enhancement and diffusion effects. If the composite brightness enhancement film is assembled into the backlight module without mounting of a diffusion film, the thickness of the backlight module is reduced. The composite brightness enhancement film exhibits good luminance, uniformity and covering properties.

Description

technical field [0001] The invention relates to the technical field of optical films, in particular to a composite brightness enhancement film and a backlight module. Background technique [0002] The backlight module is mainly composed of reflective film, light guide plate, diffusion film and brightness enhancement film, and its development trend is to improve performance and make it lighter and thinner. At present, a diffusion film is usually placed above the light guide plate to increase the shielding performance, and then two brightness enhancement films with prism angles perpendicular to each other are placed to increase the brightness of the backlight module. The stacked multi-layer films are prone to friction and scratch each other, and the thickness of the backlight module is increased, and the stacking of the film layers is not convenient for the assembly of the backlight module. Contents of the invention [0003] In order to solve the problems of high thickness ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B5/04G02B5/02
CPCG02B5/0221G02B5/0278G02B5/045
Inventor 金亚东张克然谷文翠
Owner NINGBO CHANGYANG TECH
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