| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an optical plate for improving a use rate of an optical beam, and to provide its manufacturing method. <P>SOLUTION: In the optical plate having integrally molded light increase layer and diffusion layer, the light increase layer includes a light incident face, a light emission face formed on the opposite side of the light incident face, and a plurality of spherical micro-projections formed on the surface of the light emission face. The diffusion layer includes a transparent resin adhered to the light incident face of the light increase layer and diffusion particles distributed in the transparent resin. As a material of the transparent resin of the diffusion layer, an acrylic acid resin, a polycarbonate, a polystyrene, and a styrene/acrylonitrile copolymer are used independently or mixedly. As a material of the diffusion particles, titanium dioxide, silicon dioxide, and particles of the acrylic acid resin are used independently or mixedly. <P>COPYRIGHT: (C)2008,JPO&INPIT |
