Omron Corporation

Tetsuya Minobe

Masayuki Shinohara

Yoshihiro Ueno

Masayuki Noda

Mamoru Yabe

Tetsuro Tsurusu

Isao Makuta

Shuichi Itoda

A diffusing board which can suppress moir&#xe9; fringes, color flickering and screen brightness deterioration on a screen of a liquid crystal display device. On the surface of a transparent board (), a pattern wherein substantially rectangular shapes are arranged in lattice by using a synthesized pattern () is formed. The synthesized pattern () is provided by synthesizing a plurality of first uneven patterns () having a linear shape which is long in one direction, and a plurality of concave lens shaped second uneven patterns () arranged at random.

Diffusing board and surface light source device

A point-light-source type light emitting portion faces a light incident face located at a corner portion of a light guide plate. A light diffusion pattern for emitting the light in the light guide plate from a light emission face is on the lower surface of the light guide plate. A diffusion prism sheet is on the light emission face. A prism sheet including prisms each having a concentric shape with the light emitting portion at the center is on the lower surface of the diffusion prism sheet, and an uneven diffusion plate is on the upper surface of the diffusion prism sheet. Light emitted from the light emission face of the light guide plate along the light emission face is deflected in the direction perpendicular to the light guide plate by the prism sheet, and the angle of beam spread of the light is spread by the uneven diffusion plate.

Surface light source device, diffusion plate and liquid crystal display device

Growing community of inventors

Kusatsu, Japan

Tetsuya Minobe