Optical sheet and uses thereof

Abstract

The invention discloses an optical sheet and the application thereof. The optical sheet at least comprises a substrate, a plurality of polygonal convex structures and a plurality of diffusing particles. The polygonal convex structures are arranged on a surface of the substrate, wherein, the substrate and the polygonal convex structures are made of transparent materials; and the diffusing particles are diffused in the substrate and the polygonal convex structures, wherein, the refraction coefficient of the transparent materials is not equal to that of the diffusing particles.

Description

technical field [0001] The present invention relates to an optical plate and its application, and in particular to a diffusing optical plate and its application on backlight module and liquid crystal display Background technique [0002] In the backlight module of the liquid crystal display, many optical films or optical plates are generally arranged on the light source to improve the light output quality of the backlight module. These optical films or optical plates usually include a diffuser plate. Many diffusing particles are dispersed in the diffusing plate, wherein the refractive index of these diffusing particles is different from that of the material of the diffusing plate itself. The difference in refractive index between the material of the diffuser plate itself and the diffuser particles scattered therein can provide the light diffusion function of the incident light, and then be used to make the distribution of the outgoing light of the light emitted by the light...

AI Technical Summary

Problems solved by technology

[0005] It can also be seen from the figure that although the diffuser plate 100 with a triangular convex structure can improve the uniformity of the light distribution of the light source, there will be a relatively low illuminance point at the center closest to the lamp tube (light source). And it is easy to form a dark line area, also known as the lamp dark line phenomenon (LampMura)

Usually, in order to improve or eliminate this phenomenon, it is necessary to shorten the distance between the lamp tubes, resulting in an increase in the number and cost of the lamp tubes, or increasing the thickness of the backlight module or adding other optical films, resulting in an increase in the weight, volume and cost of the display

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