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Optical diffusion film and method for preparing same

A technology of light diffusion film and diffusion layer, which is applied in the direction of chemical instruments and methods, optics, optical components, etc., can solve the problems of increased light loss and limited light-gathering ability of the diffusion film, achieve high optical uniformity and brightness, and increase brightness effect of ability

Active Publication Date: 2012-07-11
NANJING BREADY ELECTRONICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Aiming at the problems of limited light-gathering ability and increased light loss of the diffusion film in the prior art, the purpose of the present invention is to provide a new type of diffusion film, so that the diffusion film not only has a good diffusion effect, but also has a good brightness enhancement effect

Method used

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  • Optical diffusion film and method for preparing same
  • Optical diffusion film and method for preparing same
  • Optical diffusion film and method for preparing same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Embodiment 1, concrete preparation method is:

[0037] 1. Coating anti-superposition particles 3 on the back of the transparent base film 1: take a 250 ml Erlenmeyer flask, add 2 grams of anti-superposition particle silica, the average particle size is 5 microns, add 20 grams of polyacrylate, D 18 grams of ketone, 24 grams of toluene and 9 grams of butyl acetate, then add 36 grams of polyol resin, stir at a high speed, the stirring speed is 1000 rpm, and the stirring time is 15 minutes. The back of the base film 1 is placed in an oven, the drying temperature is 110° C., and the drying time is 1 minute. The thickness of the anti-lamination layer is 5 microns. At this time, the ratio of the area occupied by the anti-lamination particles 3 to the area of ​​the anti-lamination layer is 1 / 500;

[0038] 2. Coating on a silicone rubber transfer plate with a concave structure to form diffusion particles 4: Take a 250 ml three-necked flask, add 20 grams of methacrylic resin, ...

Embodiment 2

[0040] Embodiment 2, concrete preparation method is:

[0041] 1. Coating anti-superposition particles 3 on the back of the transparent base film 1: take a 250 ml Erlenmeyer flask, add 3 grams of anti-superposition particle silica, the average particle size is 5 microns, add 20 grams of polyacrylate, D 18 grams of ketone, 24 grams of toluene and 9 grams of butyl acetate, then add 40 grams of polyol resin, stir at a high speed, the stirring speed is 1000 rpm, and the stirring time is 15 minutes. The back of the base film 1 is placed in an oven, the drying temperature is 110°C, and the drying time is 1 minute. The thickness of the anti-lamination layer is 5 microns. At this time, the ratio of the area occupied by the anti-lamination particles 3 to the area of ​​the anti-lamination layer is 1 / 300;

[0042] 2. Coating on a silicone rubber transfer plate with a concave structure to form diffusion particles 4: Take a 250 ml three-necked flask, add 30 grams of methacrylic resin, 10...

Embodiment 3

[0044] Embodiment 3, concrete preparation method is:

[0045] 1. Coating anti-superposition particles 3 on the back of the transparent base film 1: take a 250 ml Erlenmeyer flask, add 1.2 grams of anti-superposition particle silica, the average particle size is 5 microns, add 20 grams of polyacrylate, D 18 grams of ketone, 24 grams of toluene and 9 grams of butyl acetate, then add 40 grams of polyol resin, stir at a high speed, the stirring speed is 1000 rpm, and the stirring time is 15 minutes. The back of the base film 1 is placed in an oven, the drying temperature is 110°C, and the drying time is 1 minute. The thickness of the anti-lamination layer is 5 microns. At this time, the ratio of the area occupied by the anti-lamination particles 3 to the area of ​​the anti-lamination layer is 1 / 800;

[0046] 2. Coating on a silicone rubber transfer plate with a concave structure to form diffusion particles 4: Take a 250 ml three-necked flask, add 10 grams of methacrylic resin, ...

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Abstract

The invention relates to an optical diffusion film and a method for preparing the optical diffusion film. The optical diffusion film comprises a transparent base film, an anti-overlapping layer and a diffusion layer; the anti-overlapping layer is arranged on the back surface of the transparent base film and comprises anti-overlapping particles and a coating layer; the diffusion layer is arranged on the front surface of the transparent base film and comprises diffusion particles and a coating layer; and the diffusion particles are formed by methyl methacrylate resin, polyol resin, silicone, carbamate and dialkoxy hypnone as the photopolymerization initiator through ultraviolet irradiation, curing and polymerization and are imprinted by using a silicone rubber roller to be in compact and orderly hemispherical micro-structures. Compared with the prior art, the optical diffusion film has high optical uniformity and brightness and effectively improved light intensifying capacity.

Description

technical field [0001] The invention relates to a light diffusion film and a preparation method thereof, in particular to a light diffusion film suitable for a thin film transistor liquid crystal display and a preparation method thereof. Background technique [0002] At present, thin film transistor liquid crystal displays (TFT-LCDs) have been widely used in almost all display fields such as digital cameras, digital video cameras, vehicle displays, desktop displays, notebook computers and LCD TVs. Since the liquid crystal itself does not emit light, it needs the backlight to achieve the function of luminous display. The performance of the backlight directly determines the display performance of the TFT-LCD, especially the brightness of the backlight will directly affect the brightness of the TFT-LCD surface. [0003] The diffusion film is one of the main optical films in the backlight system. Its main function is to diffuse the light emitted from the light guide layer throu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B5/02G02B1/10C09D4/02C09D7/12B32B3/30B32B27/04
Inventor 张宇左士祥
Owner NANJING BREADY ELECTRONICS CO LTD
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