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Diffusion membrane capable of improving viewing angle

A technology of diffusion film and angle, which is applied to the components of lighting devices, lighting devices, refractors, etc., can solve the problems of lowering, inability to watch, and the best viewing angle of liquid crystal displays, etc., to achieve good brightness and light transmittance, Improve viewing angle effect

Active Publication Date: 2013-11-27
NINGBO EXCITON TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the best viewing angles of LCD monitors are not very large. After exceeding the best viewing angles, the brightness, contrast and color effects of the screen will drop sharply, making it impossible to watch.
[0004] As the light provider of the LCD, the backlight module has a significant impact on the viewing angle of the LCD. When it deviates from the front of the backlight module, the light is significantly reduced, such as figure 2 As shown, the front brightness (at 0°) is the highest, and the brightness decreases significantly with the increase of the deviation angle of the display, which also leads to a narrower viewing angle of the liquid crystal display

Method used

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  • Diffusion membrane capable of improving viewing angle
  • Diffusion membrane capable of improving viewing angle

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Embodiment 1

[0042] The present invention provides a kind of diffusion diaphragm that improves viewing angle, wherein, choose PET material, the transparent film that thickness is 100 μ m is used as base material, on its upper surface coating diffusion layer, the diffusion layer comprises 100 parts by weight of polyurethane resin and 85 parts by weight of diffusion particles, the material of the diffusion particles is polymethyl methacrylate, the particle size is 9-10 μm, the particle size variation coefficient is 5%, and the lower surface of the diffusion film is provided with a protective coating.

Embodiment 2

[0044] The present invention provides a kind of diffusion membrane that improves viewing angle, wherein, choose PC material, the transparent film that thickness is 75 μ m is used as base material, coat diffusion layer on its upper surface, diffusion layer comprises polyurethane resin of 100 parts by weight and 90 Diffusion particles in parts by weight, the material of the diffusion particles is polystyrene, the particle diameter is 14-15 μm, the coefficient of variation of particle diameter is 3.5%, and the lower surface of the diffusion membrane is provided with a protective coating.

Embodiment 3

[0046] The present invention provides a kind of diffusion diaphragm that improves viewing angle, wherein, choose PET material, the transparent film that thickness is 75 μ m is used as base material, on its upper surface coating diffusion layer, diffusion layer comprises polyurethane resin and 100 parts by weight 100 parts by weight of diffusion particles, the material of the diffusion particles is polymethyl methacrylate, the particle size is 20 μm, the particle size variation coefficient is small and negligible, and the lower surface of the diffusion film is provided with a protective coating.

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Abstract

The invention relates to the technical field of optical thin film, in particular to a diffusion membrane capable of enlarging the viewing angle. The diffusion membrane is used for further enlarging the viewing angle of a backlight module. The diffusion membrane comprises a transparent base material, a diffusion coating and a protection coating, wherein the diffusion coating and the protection coating are arranged on the two sides of the transparent base material respectively, the diffusion coating comprises, by weight, 100 parts of adhesives and 75-120 parts of diffusion particles, the diffusion particles are adhered to the upper surface of the transparent base material through the adhesives, the particle diameters of the diffusion particles are the same, or the particle diameter variable coefficient of the diffusion particles is smaller than or equal to 15%, and the particle diameters of the diffusion particles are 8-35 microns. The diffusion membrane has the function of improving luminance and the function of enabling light to be even, and can effectively enlarge the viewing angle of the backlight module, and thus the viewing angle of a liquid crystal displayer is enlarge, and the watching effect of the liquid crystal displayer can be better.

Description

technical field [0001] The invention relates to the technical field of optical thin films, in particular to a diffusion film for improving viewing angle. Background technique [0002] In recent years, the demand for LCD TVs and monitors in the domestic market has doubled. The competition among manufacturers of LCD TVs and monitors has been fierce. At the same time, it has also promoted the improvement of the performance of LCD TVs and monitors. However, the viewing angle has always been a problem for LCD monitors, especially for the manufacture of large-size LCD TVs. manufacturer's problem. [0003] The viewing angle of the liquid crystal display refers to the range of angles in which the user can clearly see the picture of the liquid crystal display. Unlike previous CRT monitors, which have a viewing angle close to 180°, most LCDs have a much smaller viewing angle. Because the light emitted by the backlight is very directional after passing through the polarizer, liquid c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B5/02F21V5/08
Inventor 张彦李刚唐海江崔钧徐良霞
Owner NINGBO EXCITON TECH
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