Illumination – Edge lighted panel – Light guide
Reexamination Certificate
2006-03-16
2008-10-14
Negron, Ismael (Department: 2885)
Illumination
Edge lighted panel
Light guide
C362S620000, C362S623000, C362S561000, C362S559000, C349S062000, C040S547000, C040S572000
Reexamination Certificate
active
07434976
ABSTRACT:
A double-side LCD having a surface light source device including a light guide plate and a light source facing one end face of the light guide plate. A plurality of deflection patterns are formed in a surface facing a light outgoing plane of the light guide plate, the deflection pattern includes an inclined plane facing the light source side and a re-incident plane substantially perpendicular to the light outgoing plane. Light from the light source is reflected by the inclined plane and outputted from the light outgoing plane to the LCD. A tilt angle (α) of the inclined plane satisfies: 45°−[Sin−1(Sin θ
)]/2≦α≦45°+[Sin−1(Sin θ
)]/2, wherein θ is an angle between a direction of peak brightness of outputted light and a direction perpendicular to the light outgoing plane, n is a refractive index of the light guide plate, and θ is within 6-15°.
REFERENCES:
patent: 2001/0010630 (2001-08-01), Umemoto
patent: 2004/0012726 (2004-01-01), Kano et al.
patent: 2004/0027513 (2004-02-01), Yuuki et al.
patent: 2005/0002175 (2005-01-01), Matsui et al.
patent: 1271223 (2003-01-01), None
patent: WO-03/087900 (2003-10-01), None
patent: WO-2004/040361 (2004-05-01), None
European Search Report dated Aug. 9, 2006 in Applicaiton No. 06111050.8 (8 pages).
Aoyama Shigeru
Funamoto Akihiro
Kurata Gouo
Ohhira Makoto
Sakurai Kenji
Negron Ismael
OMRON Corporation
Osha • Liang LLP
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