31-10-2013 дата публикации
Номер: US20130286325A1
Принадлежит:
Disclosed herein is a multi-layered light diffusion plate, in which the multi-layered light diffusion plate is manufactured by coextruding a transparent layer comprising an amorphous transparent thermoplastic resin and a light diffusion layer comprising an amorphous transparent thermoplastic resin and transparent particles, so that the manufacturing process thereof is simple and efficient, and which has excellent light transmissivity and light diffusivity, high brightness, and high brightness uniformity, thereby improving viewing angle characteristics, and to a liquid crystal display device comprising the same. 1. A multi-layered light diffusion plate comprising a coextruded transparent layer , and a light diffusion layer , wherein the transparent layer comprises an amorphous transparent thermoplastic resin and the light diffusion layer comprises an amorphous transparent thermoplastic resin and transparent particles.2. The multi-layered light diffusion plate of claim 1 , wherein the amorphous transparent thermoplastic resin is selected from the group consisting of polyalkyl(meth)acrylate claim 1 , an alkyl(meth)acrylate-styrene copolymer claim 1 , polycarbonate claim 1 , polyvinylchloride claim 1 , a styrene-acrylonitrile copolymer claim 1 , a styrene-maleic anhydride copolymer claim 1 , a styrene-maleic anhydride derivative copolymer claim 1 , a cycloolefin copolymer claim 1 , polyacrylonitrile claim 1 , polystyrene claim 1 , polysulfone claim 1 , polyethersulfone claim 1 , polyarylate and a mixture thereof.3. The multi-layered light diffusion plate of claim 2 , wherein the amorphous transparent thermoplastic resin is selected from the group consisting of polymethyl(meth)acrylate claim 2 , a methyl(meth)acrylate-styrene copolymer claim 2 , polycarbonate claim 2 , polystyrene and a mixture thereof.4. The multi-layered light diffusion plate of claim 1 , wherein the transparent particles are inorganic particles claim 1 , organic particles or a mixture thereof.5. The ...
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