| 摘要 |
PROBLEM TO BE SOLVED: To obtain a resin plate which keeps optical properties necessary for a diffusion plate such as high transmittance and high diffusion and exhibits small warpage when its surface and back are exposed to different environments. SOLUTION: In the diffusion plate, a laminated resin plate is incorporated into a direct bottom type back light unit used in a liquid crystal monitor or a liquid crystal television unit. The laminated resin plate is composed of a substrate resin layer containing at least two methyl methacrylate-styrene copolymers different in monomer ratio and a membrane resin layer. The constitution ratio between methyl methacrylate and styrene of the copolymers in the substrate resin layer is 5:95-40:60. COPYRIGHT: (C)2006,JPO&NCIPI
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