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Photodiffusion film and preparation method thereof

A technology of light diffusion film and diffusion layer, applied in optics, nonlinear optics, instruments, etc., can solve the problem of poor light diffusion performance of light diffusion film, and achieve improved light diffusion performance, good light diffusion performance, and good light diffusion. effect of effect

Active Publication Date: 2011-06-29
BYD CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In order to overcome the defect of poor light diffusion performance of the existing light diffusion film, the present invention provides a light diffusion film with good light diffusion performance

Method used

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  • Photodiffusion film and preparation method thereof
  • Photodiffusion film and preparation method thereof
  • Photodiffusion film and preparation method thereof

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preparation example Construction

[0023] The present invention also provides a method for preparing a light-diffusing film, the method comprising sequentially forming a first diffusion layer 2 and a second diffusion layer 3 on one surface of a transparent substrate 1, the first diffusion layer 2 being composed of average particle Spherical diffusion particles with a diameter of 0.1-5 microns are formed, and are formed by a method of self-assembly into a film, and the second diffusion layer 3 is coated on the first diffusion layer 2 .

[0024] According to the method provided by the present invention, in order to further reduce the thickness of the light-diffusing layer in the final light-diffusing film, and then achieve the effect of reducing the thickness of the light-diffusing film, the method of self-assembled film is preferably include:

[0025] (a) making the spherical diffusing particles into a colloid, and diffusing the colloid into a film;

[0026] (b) make described transparent substrate 1 be placed ...

Embodiment 1

[0043] This embodiment is used to illustrate the light-diffusing film provided by the present invention and its preparation method.

[0044] (1) Form the first diffusion layer

[0045] a. Corona treatment is carried out on a transparent base material with a thickness of 30 microns formed by polyethylene terephthalate (purchased from Toray, Japan, model T60), and then cut into transparent base sheets of 80 mm × 80 mm ;

[0046] b. Fill a 500 ml beaker (the bottom is provided with a water gate) with pure water, then immerse the cut transparent substrate in step a into the bottom of the beaker;

[0047] c. Clean the glass flakes ultrasonically, and then dry them at 100°C for 30 minutes;

[0048] d. Add spherical silica particles with an average particle diameter of 1 micron (the difference between the largest particle diameter and the smallest particle diameter is 1 micron) to absolute ethanol, and then ultrasonically disperse it in an ultrasonic cleaner for 30 minutes, thereby...

Embodiment 2

[0058] This embodiment is used to illustrate the light-diffusing film provided by the present invention and its preparation method.

[0059] (1) Form the first diffusion layer

[0060] a. Corona treatment is carried out on a transparent substrate with a thickness of 100 microns formed by polystyrene (purchased from Nantong Ruiao Electronic Technology Co., Ltd., model BOPS38), and then cut into transparent substrates of 80 mm × 80 mm;

[0061] b. Fill a 500 ml beaker (the bottom is provided with a water gate) with pure water, then immerse the cut transparent substrate in step a into the bottom of the beaker;

[0062]c. Clean the glass flakes ultrasonically, and then dry them at 100°C for 30 minutes;

[0063] D, the average particle diameter is 3 micron spherical polymethacrylate particles (the difference between the maximum particle diameter and the minimum particle diameter is 1.5 micron) in dehydrated alcohol, then ultrasonically dispersed in an ultrasonic cleaner for 30 min...

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Abstract

The invention provides a photodiffusion film. The photodiffusion film comprises transparent substrates, a first diffusion layer and a second diffusion layer which are stacked sequentially, wherein the first diffusion layer is formed by spherical diffusion particles, whose average particle diameter ranges from 0.1 to 5 micron, and the first diffusion layer is coated with the second diffusion layer. The invention further provides a preparation method of a photodiffusion film. The method comprises the following steps: a first diffusion layer and a second diffusion layer are sequentially formed on one surface of transparent substrates, the first diffusion layer is formed by spherical diffusion particles, whose average particle diameter ranges from 0.1 to 5 micron, by virtue of a method of self-assembly film forming, and the first diffusion layer is coated with the second diffusion layer. The photodiffusion film provided by the invention has excellent photodiffusion performance; moreover, by the adoption of the preparation method for preparing the photodiffusion film, the photodiffusion film can be prepared and has the advantages that the thickness of a photodiffusion layer is less than 10 micron, and the photodiffusion performance can be remarkably improved.

Description

technical field [0001] The invention relates to a light diffusion film and a preparation method of the light diffusion film. Background technique [0002] Generally, a liquid crystal display device includes two parts: a display panel and a backlight module, and the diffusion film is an important component used in the backlight module. The function of the light diffusion film is to diffuse a point light source or a line light source into a uniform surface light source. Make the liquid crystal panel achieve the display effect of uniform brightness. [0003] Nowadays, liquid crystal display devices have been widely used in electronic products such as notebook computers, digital cameras, LCD TVs, mobile phones, and GPS. Developed and gradually replaced the traditional cathode ray display. In particular, the vigorous development of large-screen LCD TVs has made the thinning of liquid crystal displays a trend, which puts forward strict requirements for backlight modules, requiri...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B5/02G02F1/13357
Inventor 雷新宪穆朋亮
Owner BYD CO LTD
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