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Optical diffusion film and backlight module using same

A technology of optical diffusion and light diffusion layer, which is applied in the field of diffusion film, can solve the problems of high energy consumption of light sources, unfavorable environmental protection, high price, etc., and achieve the effect of simple process

Inactive Publication Date: 2011-02-23
浙江池河科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The line light emitted by the light source 26 passes through the light guide plate 22 and the reflection sheet 21 and becomes a surface light source with a uniform surface. The light transmitted through the light guide plate 22 passes through the lower diffusion film 23, the prism sheet 24 and the upper diffusion film 25 in sequence. In this structure Need to use relatively expensive prism sheet24
The light source 26 is one of the core components of the backlight module. At present, the light sources of most liquid crystal display devices are cold cathode fluorescent lamps, external electrode fluorescent lamps or hot cathode fluorescent lamps.
From the perspective of energy saving and environmental protection, traditional light sources such as cold cathode fluorescent lamps, external electrode fluorescent lamps or hot cathode fluorescent lamps consume a lot of energy, which is not conducive to environmental protection

Method used

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  • Optical diffusion film and backlight module using same
  • Optical diffusion film and backlight module using same
  • Optical diffusion film and backlight module using same

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] like image 3 As shown, the optical diffusion film of the present invention includes a transparent base film 110 and a light-diffusing layer 111 on one surface of the transparent base film 110, wherein the light-diffusing layer 111 further includes cross-linked transparent polymer spherical particles 112 whose particle size distribution is monodisperse And polymer adhesive 113. The transparent base film 110 is a PET polyester film with a thickness of 125 microns; the thickness of the light diffusion layer 111 is 25 microns; the average particle diameter of the cross-linked transparent polymer spherical particles 112 is 20 microns, and the particle size distribution is 1.01. Transparent polymer spherical particle is PMMA, and its addition accounts for 15% of light diffusion layer 111 weights; Polymer adhesive is the polyester polyol (Huafeng Group, JF-PE-3030) of solid content 50%; Curing agent is toluene diisocyanate.

[0026] The specific production method is: in a d...

Embodiment 2

[0028] like image 3 As shown, the optical diffusion film of the present invention includes a transparent base film 110 and a light-diffusing layer 111 on one surface of the transparent base film 110, wherein the light-diffusing layer 111 further includes cross-linked transparent polymer spherical particles 112 whose particle size distribution is monodisperse And polymer adhesive 113. The base film 110 is a PET polyester film with a thickness of 250 microns; the thickness of the light diffusion layer 111 is 30 microns; the average particle diameter of the cross-linked transparent polymer spherical particles 112 is 5 microns, the particle size distribution is 1.05, and the cross-linked transparent polymer Polymer spherical particle is PMMA, and its addition accounts for 18% of diffusion layer weight; Polymer adhesive is polyester polyol (Huafeng Group, JF-PE-3030) of solid content 50%; Curing agent is diphenylmethane diisocyanate.

[0029] The specific production method is: i...

Embodiment 3

[0031] like image 3 As shown, the optical diffusion film of the present invention includes a transparent base film 110 and a light-diffusing layer 111 on one surface of the transparent base film 110, wherein the light-diffusing layer 111 further includes cross-linked transparent polymer spherical particles 112 whose particle size distribution is monodisperse And polymer adhesive 113. The base film 110 is a PC film with a thickness of 125 microns; the thickness of the light diffusion layer 111 is 25 microns; the average particle diameter of the cross-linked transparent polymer spherical particles 112 is 20 microns, and the particle size distribution is 1.03. The spherical particles are PMMA, and its addition accounts for 10% of the weight of the diffusion layer; the polymer adhesive is polyurethane resin (Huafeng Group, JF-A-5030) with a solid content of 40%; isocyanate.

[0032] The specific production method is: in a dust-free environment above 10,000 grades, mix the cross...

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Abstract

The invention discloses an optical diffusion film. An optical diffusion layer is coated on one surface of a transparent base film, optical diffusion particles are uniformly distributed in the optical diffusion layer, the optical diffusion particles are transparent polymer spherical particles with diameters of 5 to 50 microns, and the particle diameter distribution of the transparent polymer spherical particles is monodisperse; and the optical diffusion film can effectively improve the optical uniformity. The invention also discloses a backlight module using the optical diffusion film. The backlight module can avoid using a high-cost prism sheet or a brightness enhancement film assembly, and can greatly improve the brightness of a liquid crystal display and save the manufacturing cost of the liquid crystal display.

Description

technical field [0001] The invention relates to the field of diffusion films, in particular to an optical diffusion film and a backlight module using the optical diffusion film. The optical diffusion film is a transparent film coated with a light diffusion layer on one side. The optical diffusion film is especially suitable for A backlight module of a liquid crystal display device in which a diode is a light source. Background technique [0002] In recent years, with the rapid development of flat display technology, especially liquid crystal display technology and its wide application in mobile communication equipment display, notebook computer display, desktop computer display and large-size LCD TV, the performance requirements of the optical diffusion film in the backlight module are increasingly demanding. Improvement, mainly focused on improving brightness and lighting uniformity. [0003] Most existing optical diffusion films used in backlight modules need to be used i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F21V5/08G02F1/13357F21V17/00F21S8/00F21V19/00F21Y101/02
Inventor 韩守臣李建
Owner 浙江池河科技有限公司
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