| 摘要 |
PURPOSE: A light diffusion plate of liquid crystal display is provided to check wavelength range in which transparent resin accomplishing the light diffusion plate for the back light unit of the liquid crystal display device is vulnerable, and to improve light-proof on ultraviolet ray by applying UV stabilizer showing relatively superior absorption ability on vulnerable wavelength range. CONSTITUTION: The benzotriazole based first UV stabilizer includes 0.05 to 1.00 parts by weight having polycarbonate resin 100 parts by weight standard and absorbs the ultraviolet ray of 280nm to 300nm wavelength range more superior than other wavelength range. The triazine based second UV stabilizer includes 0.05 to 1.00 parts by weight having polycarbonate resin 100 parts by weight standard and absorbs the ultraviolet ray of 300nm to 320nm wavelength range more superior than other wavelength range. The light diffusion plate(100) uses co-extruder and co-extrudes the base layer(110) and skin layer(120). The surface of the base layer is formed in flat surface or having pattern of lenticular shape of elliptic shape, embossing shape, prism shape etc.
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