According to the classification of LCD displays, there are two types of side-projection type and direct-type. Among them, the diffusion material used for the side-projection type is called diffusion film (or diffusion sheet); in the direct type backlight light source, two types of diffusion materials are used, one One is diffusion membrane, and the other is 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. Generally, the traditional XLK100 diffusion film is mainly in the diffusion film substrate, adding one by one chemical particles as scattering particles, while the existing diffusion plate has a dispersed particle Between the resin layers, when the light passes through the diffusion layer, it will continue to pass through two media with different refractive indexes, so the light will undergo a lot of refraction, reflection and scattering, which results in the effect of optical diffusion. . xU @1 5 Under normal circumstances, the backlight module needs two upper and lower diffusion films. The upper diffusion film is close to the observer's line of sight, which requires high quality and low tolerance to defects, and the price is higher than the lower diffusion film.