| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an optical sheet with excellent condensation property, diffusion characteristic and a configuration inhibiting interference fringe, that can protect the optical sheet itself from damage due to warping or twisting even when another optical sheet is laminated on a light emission surface. <P>SOLUTION: An optical sheet 10 includes a substantially hemispherical microlens 31 and a prism lens 19 provided on a light emission surface 10b where a cross section height h of the microlens 31 in a cross section along a top part of the prism lens 19 is randomly varied in a range of a height H1 at the highest. <P>COPYRIGHT: (C)2012,JPO&INPIT |
