Light guide plate with compensated emission light field

Details Light guide plate with compensated emission light field Light guide plate with compensated emission light field

2007-11-05

2009-08-04

Lee, Y My Quach (Department: 2885)

Illumination

Edge lighted panel

Light guide

C362S614000, C362S620000

Reexamination Certificate

active

07568828

ABSTRACT:
A light guide plate includes a light incidence surface, a light reflection surface, and a light emission surface. The light reflection surface forms a plurality of light-guiding structures extending in a direction substantially parallel to a light source. The light reflection surface has an edge margin section adjacent to the light incidence surface and having opposite end zones each containing auxiliary light-guiding structures that extend in a direction substantially perpendicular to the light source and has an irregular V-shaped cross-section defined by a long inclined side, which faces endwise, and a short inclined side. The auxiliary light-guiding structures are distributed from a densest condition at each end portion toward a sparsest condition at a middle portion of the edge margin section. The long side helps to redirect a greater amount of light to a desired light emission direction thereby enhancing uniformity of light emission of the light guide plate.

REFERENCES:
patent: 7097341 (2006-08-01), Tsai
patent: 7178966 (2007-02-01), Yu et al.
patent: 2008/0008434 (2008-01-01), Lee et al.

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