A kind of flexible optical diffusion film and preparation method thereof

Abstract

The invention provides a flexible optical diffusion barrier which comprises a base material layer. The upper surface of the base material layer is coated with masking liquid to form a flexible optical diffusion layer, and the lower surface of the base material layer is coated with masking liquid to form an anti-adhesion layer. The masking liquid of the flexible optical diffusion layer comprises, by weight, 15-30 parts of resin film forming matter, 5-30 parts of diffusion particles, 1-5 parts of cross-linking agents and 40-70 parts of solvents. The masking liquid of the anti-adhesion layer comprises, by weight, 15-30 parts of resin film forming matter, 5-30 parts of anti-adhesion particles, 1-5 parts of cross-linking agents and 40-70 parts of solvents. The resin film forming matter is straight chain type hydroxyl polyester resin or polyurethane elastomer modified polyester resin. According to the flexible optical diffusion barrier, the flexible optical diffusion layer and the anti-adhesion layer on the surfaces of the base material layer are prepared through raw material preparation, diffusion, drying and aging treatment, the prepared optical diffusion barrier has good flexibility, and abrasion to prism films in a backlight module can be reduced.

Description

technical field [0001] The invention relates to the field of liquid crystal display manufacture, in particular to a flexible optical diffusion film and a preparation method thereof. Background technique [0002] As an important part of the information industry, the liquid crystal display industry has developed rapidly in recent years. Liquid crystal displays are widely used in TVs, computer monitors, notebook computers, mobile phones, digital cameras, MP3, MP4, MP5, car DSC / DV, GPS navigators and other devices with displays. But these displays themselves do not emit light, and the light source for the picture is provided by the backlight module, which requires uniform and high brightness of the light source. [0003] Whether it is the LED backlight that is widely used now or the traditional CCFL backlight, the light emitted by it is either a point light source or a line light source, and it is not a surface light source. However, it can be distributed into a uniform surfac...

AI Technical Summary

Problems solved by technology

[0006] However, the existing optical diffusion films all use acrylic resin or polyurethane with a high glass transition temperature as the film-forming material. After the film is formed, a hard coating is formed, and it is easy to bend and produce creases during processing and use, so it is scrapped.

At the same time, when the existing optical diffusion film is applied to the backlight module, it is easy to scratch the prism film, resulting in a decline in the quality of the product, so the existing optical diffusion film needs further improvement

Images