| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an optical sheet capable of eliminating rapid lowering of a luminance view angle while minimizing lowering amount of front luminance or while avoiding lowering of the front luminance. <P>SOLUTION: The optical sheet includes a luminance enhancement film 33 and an anisotropic diffusion sheet 34 which are layered on each other. The luminance enhancement film 33 has a plurality of convexes 33a, that extend in a given direction and are arranged in parallel in a direction crossing the given direction, in-plane on the anisotropic diffusion sheet 34 side. The anisotropic diffusion sheet 34 has a plurality of convexes 34a, that are arranged in parallel in one direction and are arranged in parallel in a direction crossing the one direction, in-plane on the luminance enhancement film 33 side and has shape anisotropy and refractive index anisotropy in-plane. <P>COPYRIGHT: (C)2009,JPO&INPIT |
