Mainly refers to the backlight light source part applied to the LCD module. zhi light passes through the diffusion layer with PET as the base material dao, and will pass through the medium with different refractive index, so that the light will undergo many refraction, reflection and scattering phenomena, and the light can be corrected into a uniform surface light source to achieve optical diffusion effect. According to the classification of LCD monitors, there are two types of side projection type and direct type. Among them, the diffusion material used for side projection type is called XLK100 diffusion film (or diffusion sheet).
In the direct-lit backlight source, two diffusion materials are used, one is a diffusion film and the other is a diffusion plate. The important indicators of the diffusion film are total light transmittance and haze. The function of the XLK100 diffusion film is to provide a uniform surface light source for the liquid crystal display.