Warping-resistant optical thin film, preparation method thereof and display device using optical thin film

A technology for optical films and display devices, applied in optics, nonlinear optics, instruments, etc., can solve the problems of forming wavy lines, easy to produce warping, etc., and achieve the effects of easy operation, low coating shrinkage, and simple process

Active Publication Date: 2013-02-13
NINGBO EXCITON TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the defects that the film surface of the existing diffusion film is prone to warpage and form wavy lines, the present invention provides an anti-warp optical film, its preparation method and a display device using the optical film. The anti-warp film provided by the present invention The curved optical film has the advantages of the existing diffusion film, and its coating shrinkage rate is low, which can significantly reduce the occurrence of warpage. good, no shadows

Method used

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  • Warping-resistant optical thin film, preparation method thereof and display device using optical thin film
  • Warping-resistant optical thin film, preparation method thereof and display device using optical thin film
  • Warping-resistant optical thin film, preparation method thereof and display device using optical thin film

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preparation example Construction

[0041] The preparation method of the anti-warping optical film provided by the invention comprises the following steps:

[0042] (1) Prepare the upper diffusion coating coating solution: in the mixing tank, add 100 parts by weight of glue, 70-100 parts by weight of diffusion particles, 0.01-5% of additives, solvent, and stir for 1-4 hours. Then add curing agent and stir for 0.5-1 hour;

[0043] (2) Prepare the lower diffusion coating coating solution: in the mixing tank, add 100 parts by weight of glue, 50-100 parts by weight, or 1-20 parts by weight of diffusion particles, 0.01-5% of additives, solvents , stirred for 0.5-4 hours, then added curing agent, stirred for 0.5-1 hours;

[0044] (3) Apply the upper diffusion coating coating solution prepared in step (1) to the upper surface of the transparent substrate, and bake at 80-120°C for 1-30 minutes;

[0045] (4) Coating the lower diffusion coating coating solution prepared in step (2) on the lower surface of the transparen...

Embodiment 1

[0057] Prepare the anti-warping optical film provided by the invention according to the above method, such as figure 1 As shown, the anti-warping optical film includes a transparent substrate 102, the transparent substrate is made of PET, the thickness is 100um, and the heat shrinkage rate is 0.2%-1.5%. The upper surface of the transparent substrate is provided with an upper diffusion coating 101, the upper diffusion coating is acrylic resin, the upper diffusion particles are arranged in the coating, the upper diffusion particles include organic particles and inorganic particles, and the upper diffusion adhesive layer 104 is in parts by weight is 100 parts by weight, and the part by weight of the upper diffusion particles is 75 parts by weight. The lower surface of the transparent substrate is provided with a lower diffusion coating 103, the lower diffusion coating is acrylic resin, and the lower diffusion coating is provided with lower diffusion particles, the lower diffusion...

Embodiment 2

[0059] Prepare the anti-warping optical film provided by the invention according to the above method, such as figure 2 As shown, the transparent substrate 102 is PET with a thickness of 38um and a thermal shrinkage rate of 0.2%-1.5%. The upper diffusion coating 101 is made of acrylic resin, and the upper diffusion particles contained are organic particles and inorganic particles. The weight of the upper diffusion adhesive layer The parts are 100 parts by weight, and the parts by weight of the upper diffusion particles are 100 parts by weight. The protective coating 107 is made of acrylic resin, and the lower diffusion particles are organic particles with a particle size of 3um-20um. The weight part of the lower diffusion layer is 100 parts by weight, and the weight part of the diffusion particles is 20 parts by weight. The weight of the lower diffusion particles is 0.2 times that of the upper diffusion particles, and the thickness of the protective coating 107 is 2 um thicker...

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Abstract

The invention relates to the technical field of optical thin films, in particular to a warping-resistant optical thin film, a preparation method thereof and a display device using the optical thin film, and aims to overcome the defects that a film surface of the conventional diffusion film is easy to warp, and raised grains are generated. The optical thin film comprises a transparent base plate; one side of the transparent base plate is provided with an upper diffusion coating, and the other side of the transparent base plate is provided with a lower diffusion coating; the thickness of the upper diffusion coating is 1 to 50 mu m; and the absolute value of the difference between the thickness of the lower diffusion coating and the upper diffusion coating is less than or equal to 3 mu m. The provided warping-resistant optical thin film has the advantages of the conventional diffusion film; the coatings of the film are low in shrinkage percentage; the warping phenomena can be reduced obviously; the preparation method is simple and easy to operate; and the optical thin film is used as the diffusion film in the display device, a good screen effect can be achieved, and shadows can be avoided.

Description

technical field [0001] The invention relates to the technical field of optical films, in particular to an anti-warping optical film, a preparation method thereof and a display device using the optical film. Background technique [0002] With the popularity of a series of digital devices such as mobile phones, laptops, tablets, cameras and LCD TVs, liquid crystal display technology has become more and more important. The diffusion film is an essential part of the liquid crystal display device, and its main function is to make the light emitted by the lamp tube into a secondary light source with larger area, higher brightness, better uniformity and stable chromaticity. [0003] The quality of the diffusion film directly affects the effect of the display screen. During the use of the liquid crystal display, a part of heat will inevitably be released, causing the ambient temperature of the diffusion film to reach above 50°C. During the process of continuous heating and returnin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B5/02G02F1/1335
Inventor 张彦
Owner NINGBO EXCITON TECH
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