Light guide plate for surface light source

Details Light guide plate for surface light source Light guide plate for surface light source

2008-09-23

2011-10-11

Payne, Sharon (Department: 2875)

Illumination

Edge lighted panel

Light guide

C362S561000, C362S097200, C362S620000, C362S626000

Reexamination Certificate

active

08033710

ABSTRACT:
A plurality of mirror surfaces (5), which extend in a direction (X-axis direction) perpendicular to a light incident surface (2a), are formed side by side in a longitudinal direction (Y-axis direction) of the light incident surface (2a) on a light distribution control surface (4a) of both surfaces (4a, 4b) of a light guide plate (1) in a thickness direction (Z-axis direction) thereof, and a plurality of prisms (7) extending in the Y-axis direction are formed side by side in the X-axis direction in areas other than the mirror surfaces (5). The mirror surfaces5are formed in such a way that Y-axis direction widths thereof vary in the X-axis direction. This enables the setting of the light distribution characteristics and luminance distribution of emitted light, which are viewed in two directions, namely a longitudinal direction of the light incident surface of the light guide plate and the direction perpendicular to the light incident surface, to target light distribution characteristics and luminance distribution.

REFERENCES:
patent: 3806223 (1974-04-01), Keck et al.
patent: 5359691 (1994-10-01), Tai et al.
patent: 5931555 (1999-08-01), Akahane et al.
patent: 7001035 (2006-02-01), Kawakami
patent: 2001-035224 (2001-02-01), None
patent: 2006-049286 (2006-02-01), None
patent: WO 03/010560 (2003-02-01), None

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