Light guide plate and surface light source

Details Light guide plate and surface light source Light guide plate and surface light source

2006-08-29

2006-08-29

Ward, John Anthony (Department: 2875)

Illumination

Edge lighted panel

Light guide

C362S331000, C349S061000

Reexamination Certificate

active

07097341

ABSTRACT:
A light guide plate (32) used in a surface light source (30) for a liquid crystal display includes a light incidence surface (321) for receiving light beams, an emission surface (325) perpendicular to the light incidence surface for emitting the light, a bottom surface (323) opposite to the emission surface, and a plurality of grooves (327) and light reflection dots (329) formed on the bottom surface. The grooves are formed in a continuous band adjacent to the light incidence surface and extend perpendicular to the light incidence surface for scattering the light beams. The light guide plate provides highly uniform illumination for a liquid crystal display panel.

REFERENCES:
patent: 4373282 (1983-02-01), Wragg
patent: 5461547 (1995-10-01), Ciupke et al.
patent: 5971559 (1999-10-01), Ishikawa et al.
patent: 6332691 (2001-12-01), Oda et al.
patent: 6799860 (2004-10-01), Nakaoka et al.

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