Focusing plate, surface light source device, and image...

Details Focusing plate, surface light source device, and image... Focusing plate, surface light source device, and image...

2004-03-04

2008-12-16

Ton, Anabel M (Department: 2875)

Illumination

Edge lighted panel

Light guide

C362S620000

Reexamination Certificate

active

07465083

ABSTRACT:
An increased emission brightness provides a clear image display. Light from luminescent lamp10travels into light guide plate2through incidence face3, being emitted from emission face4for irradiating LCD panel5.Back face7of light guide plate2serves as light gathering function surfaces14, 15reflecting light as to gather the light around a normal direction of emission face4which provides an emission promotion surface having first and second slopes17and18for promoting the light introduce through incidence face3, the first slopes17being configurated as to gently decrease thickness of light guide plate2with an increasing distance from incidence face3while second slopes18are configurated as to sharply increase thickness of light guide plate2with an increasing distance from thinner-plate-thickness-side end portions of slopes17.

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