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Composite brightness enhancement film and preparation method thereof

A technology of brightness enhancement film and brightness enhancement layer, which is applied in optics, optical components, nonlinear optics, etc., can solve the problem of single brightness enhancement film, and achieve the effects of avoiding electrostatic adsorption, good peel strength and stiffness, and good shielding

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

[0004] In order to solve the problem that the existing brightness enhancement film can only concentrate light in a single direction, the present invention provides a composite brightness enhancement film and its preparation method

Method used

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  • Composite brightness enhancement film and preparation method thereof
  • Composite brightness enhancement film and preparation method thereof
  • Composite brightness enhancement film and preparation method thereof

Examples

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Comparison scheme
Effect test

Embodiment 1

[0038] The invention provides a composite brightness enhancement film, wherein,

[0039] Preparation of the second light-enhancing layer: the second substrate is a biaxially stretched polyester film (thickness 100 μm, manufactured by Changyang Science and Technology Co., Ltd., trade name "OSQ2"). One side of the second substrate adopts the off-line coating method, and the coating includes PMMA diffusion particles (Soken Chemical (Suzhou) Co., Ltd., product model KSR-3) and polyurethane acrylate polymer binding resin (produced by DIC Corporation of Japan). ) coating liquid, through UV curing to form the second back coating, after film formation, the thickness of the second back coating is 1 μm, and the content of the diffusion particles is 20%. Then, on the other side of the second substrate, urethane acrylate glue (produced by Shinko Chemical Industry Co., Ltd., product model UB-3331) is passed through the forming roller and the back pressure roller, and UV curing is performed...

Embodiment 2

[0045] For the composite brightness enhancement film provided in Example 1, wherein the second back coating particle content is 23%, the optical properties and mechanical properties of the obtained composite brightness enhancement film are shown in Table 2.

Embodiment 3

[0047] For the composite brightness enhancement film provided in Example 2, wherein the particle content of the second back coating is 25%, the optical properties and mechanical properties of the obtained composite brightness enhancement film are shown in Table 2.

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Abstract

The invention relates to a film for optics, and especially relates to a composite brightness enhancement film and a preparation method thereof to solve the problem that a conventional brightness enhancement film can only gather light in a single direction. The composite brightness enhancement film comprises a first brightness enhancement layer and a second brightness enhancement layer. The first brightness enhancement layer comprises a first substrate, a first microstructure layer and a first back coating layer, wherein the first microstructure layer is arranged on the first substrate, and the first back coating layer is arranged under the first substrate. The second brightness enhancement layer comprises a second substrate, a second microstructure layer and a second back coating layer, wherein the second microstructure layer is arranged on the second substrate, and the second back coating layer is arranged under the second substrate. The first back coating layer is adhered to the second microstructure layer, so that the first brightness enhancement layer and the second brightness enhancement layer are compounded together. The composite brightness enhancement film exhibits a good brightness enhancement effect and a good shielding effect, and exhibits great peeling intensity and rigidness.

Description

technical field [0001] The invention relates to an optical film, in particular to a composite brightness enhancement film and a preparation method thereof. Background technique [0002] With the advent of the digital age, liquid crystal displays (LCDs) have become the most common display technology today. LCDs are non-luminous display devices that require a backlight source to achieve the display function. At present, it is used as a raw material for backlight modules of LCD display equipment, which meets the optical requirements such as brightness and shading. With further research on optical films, it can better avoid various defects. For example, U.S. Patent (Patent No. 5,626,800) adopts elastic resin to restore its original shape after being scratched by the outside world. However, if the prism is only installed in a single direction, it can only concentrate the light on the surface perpendicular to the prism, and cannot improve the central luminance more efficiently. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B1/10G02B5/02G02F1/1335
CPCG02B1/10G02B5/0231G02F1/133504G02F1/133507
Inventor 金亚东张克然张泽
Owner NINGBO CHANGYANG TECH
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