Surface light source device and display

Details Surface light source device and display Surface light source device and display

2007-12-18

2007-12-18

Lee, Jong-Suk (James) (Department: 2885)

Illumination

Edge lighted panel

Light guide

C362S621000, C362S617000, C362S620000, C362S626000, C349S065000, C349S062000

Reexamination Certificate

active

11290990

ABSTRACT:
Light guide plate4is provided with an emission-directivity-giving-means (such as projection rows on a back face) to modify directivity of emission from emission face10. L light control member11disposed on emission face10is provided with a plurality of prismatic projection rows15running in a direction inclined anticlockwise (or clockwise). Each of incidence control portions12formed on incidence face5has an asymmetric configuration providing first and second side face (convex face)13, 14different from each other in curvature. Light emitted by LED6enters into light guide plate4through each incidence control portion12, generating inner propagation light which spreads like a sector having a center axis inclined clockwise (or anticlockwise). The first and second side faces may have other configurations such as “concave faces different from each other in curvature”, “flat slopes different from each other in inclination” or “flat face and curved face”.

REFERENCES:
patent: 7042534 (2006-05-01), Fujishiro
patent: 5-25426 (1993-04-01), None
patent: 2002-196151 (2002-07-01), None

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