Planar lighting device

Details Planar lighting device Planar lighting device

2007-02-07

2009-02-17

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

Illumination

Edge lighted panel

Light guide

C362S097200, C362S613000, C362S616000, C362S633000

Reexamination Certificate

active

07490971

ABSTRACT:
The planar lighting device includes linear light sources, a light guide plate having a flat light exit surface, a rear surface and parallel grooves formed in the rear surface for accommodating the light sources, respectively, and a support member for supporting the light guide plate with the rear surface. A cross-section of the light guide plate has a rear surface profile including convex portions having the respective grooves and concave portions formed between adjacent grooves, and a thickness in each concave portion decreases from each groove toward either midpoint between adjacent grooves and is thinnest at the midpoint. A cross-section of the support member has a first surface profile of a first surface including a profile identical to a profile of each concave portion of the rear surface profile and a second surface of the support member is a flat surface.

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