Anti-scratch optical diffusion film

Abstract

The invention discloses an anti-scratch optical diffusion film, and relates to the technical field of optical films. The anti-scratch optical diffusion film comprises a substrate, an upper diffusion coating layer and a lower diffusion coating layer, wherein the upper diffusion coating layer and the lower diffusion coating layer respectively contain a diffusion glue layer and diffusion particles; the diffusion particles in the upper diffusion coating layer contain small-size diffusion particles with average particle size of 2 to 10mum, and large-size diffusion particles with average particle size of 20 to 30mum; the diffusion particles in the upper diffusion coating are compressed in the force direction after suffering from external force, and are restored after the external force is removed; the lower diffusion coating comprises diffusion particles with particle size of 5 to 10mum, and the lower diffusion particles are dispersed in the lower surface of the substrate in a mutual non-contact way. The optical diffusion film has the advantages that the diffusion particles have certain compressing property, the scraping of the diffusion particles by friction is avoided, the scratching of the optical diffusion film is reduced, and the defect of scraping of large-area particles after a resin enhancer is used under the action of external force in the prior art is overcome.

Description

technical field [0001] The invention relates to the technical field of optical films, in particular to an anti-scratch optical diffusion film. Background technique [0002] Optical diffusion films are widely used in liquid crystal display devices, advertising light boxes, lighting devices, mobile communication equipment buttons and other devices that require light sources to provide uniform lighting. [0003] In recent years, liquid crystal display devices have developed rapidly, and are widely used in display devices of mobile communication equipment, notebook computers, desktop computers, and large-size LCD TVs. Generally, 5-7 optical films are used in liquid crystal display devices, and the use of optical diffusion films in lighting devices is increasing day by day, which makes liquid crystal display devices and lighting devices increasingly require optical diffusion films. Mainly focused on improving brightness. [0004] However, in addition to high brightness during u...

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Problems solved by technology

However, there are also diffusion particles in the diffusion coating of the optical diffusion film, and most of the diffusion particles are exposed from the diffusion coating. If only the strength of the resin itself is enhanced, the bonding strength between the resin and the particles cannot be guaranteed. During the use of the film, the diffusion particles in the diffusion coating of the optical diffusion film will still fall off or be scratched, which will affect the use of the optical diffusion film

Most of the diffusion coatings of the optical diffusion film in the prior art use diffusion particles with a single particle size or a narrow dispersion particle size, so that when the film is subjected to external forces, such as being rubbed or scratched, it is easy to cause the diffusion particles to be scratched in a large area. Injured or peeled off, resulting in a large area of ​​scratches on the optical diffusion film

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