Brightening diffusion film and preparation method thereof

A technology of diffusion film and diffusion layer, applied in chemical instruments and methods, lamination, coating, etc., can solve the problems of high cost, poor coating performance, large particle size of diffusion microbeads, etc., to achieve easy operation and increase brightness , the effect of simple process

Active Publication Date: 2013-10-09
NINGBO EXCITON TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In order to solve the problem of high cost and poor coating performance due to the large particle size of the diffusion microbeads on the surface of the existing diffusion film, the present invention provides a brightness-enhancing diffusion film and a preparation method thereof. The diffuser film can improve the front brightness of the backlight module, and has the advantages of atomizing the light source and reducing the cost, and its preparation method is simple and easy to operate

Method used

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  • Brightening diffusion film and preparation method thereof

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Embodiment 1

[0040] Prepare the brightness-enhancing diffusion film provided by the present invention according to the above method, wherein the transparent substrate is PET, and the diffusion layer contains: 100 parts by weight of acrylic adhesive, 80 parts by weight of large diffusion particles with a particle size of 15 μm, 30 parts by weight Parts by weight are small diffusion particles with a particle diameter of 5 μm, and both the large diffusion particles and the small diffusion particles are made of PMMA. Protrusions of 15-100 μm are formed on the surface of the diffusion layer, and a protective coating is provided on the lower surface of the substrate.

Embodiment 2

[0042] Prepare the brightness-enhancing diffusion film provided by the present invention according to the above method, wherein the transparent substrate is PET, and the diffusion layer contains: 100 parts by weight of polyurethane adhesive, 100 parts by weight of large diffusion particles with a particle size of 20 μm, 20 Parts by weight are small diffusion particles with a particle diameter of 5 μm, and both the large diffusion particles and the small diffusion particles are made of PMMA. Protrusions of 25 μm-150 μm are formed on the surface of the diffusion layer. A protective coating is provided on the lower surface of the substrate.

Embodiment 3

[0044] Prepare the brightness-enhancing diffusion film provided by the present invention according to the above method, wherein the transparent substrate is PC, and the diffusion layer contains: 100 parts by weight of polyurethane adhesive, 120 parts by weight of large diffusion particles with a particle size of 20-25 μm , 50 parts by weight of small diffusion particles with a particle size of 1-3 μm, the materials of the large diffusion particles and the small diffusion particles are both PS. Protrusions of 20-80 μm are formed on the surface of the diffusion layer. A protective coating is provided on the lower surface of the substrate.

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Abstract

The invention relates to the technical field of optical films and in particular relates to a brightening diffusion film and a preparation method thereof. In order to solve the problems that the cost is high and the coating performance is poor because diffusion microbeads on the surface of a conventional diffusion film are large in particle size, the invention provides a brightening diffusion film and a preparation method thereof. The diffusion film comprises a transparent base material, wherein a diffusion layer is arranged on the upper surface of the transparent base material; a protective coating is arranged on the lower surface of the transparent base material; the diffusion layer comprises an adhesive and diffusion particles; the diffusion particles are adhered to the transparent base material through the adhesive; the diffusion particles include large diffusion particles and small diffusion particles; the diffusion particles form bulges on the surface of the diffusion layer; each bulge has the height of 10-200 microns. According to the provided brightening diffusion film, the positive brightness of a backlight module can be improved, and the diffusion film has the advantages of atomizing a light source and reducing the cost; moreover, the preparation method is simple in process and easy to operate.

Description

technical field [0001] The invention relates to the technical field of optical thin films, in particular to a brightness-enhancing diffusion film and a preparation method thereof. Background technique [0002] As one of the key components of liquid crystal displays, the backlight module has entered a period of rapid development with the rapid development of digital products. For the continuous innovation of digital products, such as mobile phones, tablet computers, notebook computers, LCD TVs and other products, the requirements for brightness and energy saving are getting higher and higher. Basic increase in brightness. [0003] The main function of the backlight module is to provide a uniform and efficient surface light source for the display. As one of the important components of the backlight module, the diffusion film is mainly used to diffuse light, atomize the light source, and improve brightness. Generally, each backlight module needs 2 -5 pieces of diffuser film. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B5/02G02B1/04G02B1/10C09D133/00C09D175/04C09D163/00C09D7/12B32B37/12G02B1/14
Inventor 张彦唐海江李刚崔钧
Owner NINGBO EXCITON TECH
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