A kind of anti-warping optical diffusion film and its preparation method

Abstract

The present invention provides an anti-warping optical diffusion barrier. The anti-warping optical diffusion barrier comprises a transparent substrate layer, one surface of the transparent substrate layer is coated to form a light diffusion layer, the other surface of the transparent substrate layer is coated to form an anti-bonding layer, the light diffusion layer and the anti-bonding layer comprise a resin film-forming material, optical diffusion particles, cross-linking agent and solvent, the resin film-forming material is formed by liquid rubber and optical resin, the mass ratio of the liquid rubber to the optical resin is controlled to be 1:1-1:9, the optical diffusion particles of the light diffusion layer are formed by macro-particle particles and small-particle particles, the mass ratio of the macro-particle particles to the small-particle particles is 1:1-4:1, the particle size of the macro-particle particles is 10 [mu]m to 30 [mu]m, the particle size of the small-particle particles is 0.1 [mu]m to 10 [mu]m, and the particle size of the optical diffusion particles of the anti-bonding layer is controlled to be 2 [mu]m to 15 [mu]m. The anti-warping optical diffusion barrier is advantageous in that the preparation method is simple, the production cost is low, and the problem of warping can be alleviated.

Description

technical field [0001] The invention relates to the technical field of optical diffusion film preparation, in particular to an anti-warp optical diffusion film and a preparation method thereof. Background technique [0002] As a new material and new technology, optical diffusion film (referred to as diffusion film) is widely used in liquid crystal displays, advertising background lights, lighting light boxes and other fields. Especially in liquid crystal display devices, the diffusion film is a key component in the backlight module. Liquid crystal display technology is becoming more and more important as a range of digital devices such as mobile phones, laptops, tablets, cameras and liquid crystal displays become popular. As an essential part of the LCD backlight module, the diffusion film is mainly used to atomize the light emitted by the lamp tube to obtain a secondary light source with better uniformity and stable chromaticity. [0003] The quality of the optical diffus...

AI Technical Summary

Problems solved by technology

However, the addition of such substances, such as: petroleum resin (C5\C9 resin), polyvinyl acetate (PVAc), etc., will obviously affect the optical properties and physical properties of the optical film, such as the addition of such substances improves the coating The brittleness of the layer causes the coating to be easily broken after being stressed; in addition, some patents also point out that the solution to this type of problem can reduce warping by coating the same coating on both sides of the optical substrate, such as ZL201210400625.8

Although this scheme reduces warpage technically, it has the disadvantages of complicated process and high cost

Images