Optical diffusion barrier with covering power and light transmittance compatibility and preparation method thereof

Abstract

The invention discloses an optical diffusion barrier with covering power and light transmittance compatibility, comprising a transparent PET base material, a diffusion layer coating the upper surface of the base material, and a back coating layer coating the lower surface of the base material. The diffusion particle of the diffusion layer comprises composite particle size organic particles composed of large particle size organic particles with a particle size range of 10-20 mu m, middle particle size organic particles with a particle size range of 5-8 mu m, and small particle size organic particles with a particle size range of 1-3 mu m, and small particle size inorganic particles with a particle size range of 20-500 nm. The arrangement format, particle size and mass percent of organic particles in the diffusion layer and the thickness of the diffusion layer are controlled, thereby realizing the covering power and light transmittance compatibility of the diffusion barrier; in addition, anti-adhesion inorganic particles are arranged in the back coating layer, so as to enhance scraping resistance performance, and to allow the diffusion barrier to possess better antistatic and anti-adhesion performance. The invention also discloses a preparation method of the optical diffusion barrier with covering power and light transmittance compatibility, which meets market demands, possesses simple processes and is easy to operate.

Description

technical field [0001] The invention relates to the technical field of optical thin films, in particular to an optical diffusion film and a preparation method thereof. Background technique [0002] In recent years, flat panel display technology and products have developed rapidly, and the flat panel display industry and market are growing rapidly around the world. Flat panel displays are widely used in TVs, computer monitors, laptops, mobile phones, digital cameras, GPS navigators, etc. As an important part of FPD, the backlight module is mainly composed of backlight, light guide plate, optical diffusion film, prism film and reflective film. The optical diffusion film is located above the light guide plate. After passing through the diffusion film, many refractions, Reflection and scattering phenomena, so as to form a uniform surface light source to achieve the effect of optical diffusion. [0003] With the development of displays towards functionalization, the optical and...

AI Technical Summary

Problems solved by technology

Chinese patent CN10334501A discloses a diffuser film applied to side-lit backlight modules. The haze and covering property of the end close to the light source are higher than those of the end far away from the light source, but the coating thickness of the near light source end and the far light source end must be made Inconsistent, in fact, it is difficult to implement

[0006] At the same time, due to the particularity of the LED light source, the general diffusion film cannot cover the phenomenon of LED fireflies at all, and some of the dots and grids of the light guide plate are also poorly covered. Light panels have higher and higher requirements on the light transmittance, haze and scratch resistance of the diffusion film

[0007] It can be seen that the above-mentioned existing backlight module optical diffusion film obviously still has deficiencies in structure and performance, and needs further improvement.

Images