Planar illuminating device

Details Planar illuminating device Planar illuminating device

2006-08-17

2010-11-02

Song, Sarah (Department: 2874)

Optical waveguides

Planar optical waveguide

C385S901000, C362S613000, C362S616000, C362S628000

Reexamination Certificate

active

07826703

ABSTRACT:
Provided is a planar lighting device having a thin shape and capable of emitting uniform illumination light with less brightness unevenness. The planar lighting device includes a first and a second light sources arranged at a given distance apart from each other and a light guide plate arranged between the first and second light sources. The light guide plate includes a light exit plane, a first light entrance plane facing the first light source and containing one side of the light exit plane, and a second light entrance plane facing the second light source and containing the opposite side to the one side, and has a shape growing thicker from the first and second light entrance planes toward the center. The light guide plate contains scattering particles for scattering light entering through the first and second light entrance planes and propagating inside by a ratio satisfying 1.1≦Φ·Np·LG·KC≦8.2.

REFERENCES:
patent: 5542017 (1996-07-01), Koike
patent: 5654779 (1997-08-01), Nakayama et al.
patent: 6241358 (2001-06-01), Higuchi et al.
patent: 2001/0017774 (2001-08-01), Ito et al.
patent: 2003/0099118 (2003-05-01), Saitoh et al.
patent: 2004/0124764 (2004-07-01), Suzuki et al.
patent: 2004/0202436 (2004-10-01), Cho et al.
patent: 2005/0100282 (2005-05-01), Okada et al.
patent: 2005/0201706 (2005-09-01), Iwasaki
patent: 2007/0290622 (2007-12-01), Furukawa
patent: 2-208631 (1990-08-01), None
patent: 5-4133 (1993-01-01), None
patent: 05-249319 (1993-09-01), None
patent: 06-102414 (1994-04-01), None
patent: 07-311380 (1995-11-01), None
patent: 08-094851 (1996-04-01), None
patent: 09-293406 (1997-11-01), None
patent: 11-288611 (1999-10-01), None
patent: 2001-266626 (2001-09-01), None
patent: 2001-281655 (2001-10-01), None
patent: 2001-312916 (2001-11-01), None
patent: 2001-345007 (2001-12-01), None
patent: 2002-031798 (2002-01-01), None
patent: 2002-133932 (2002-05-01), None
patent: 2003-167130 (2003-06-01), None
patent: 2004-038108 (2004-02-01), None
patent: 2004-146268 (2004-05-01), None
patent: 2004-171948 (2004-06-01), None
patent: 2004-241237 (2004-08-01), None
patent: 2004-265635 (2004-09-01), None
patent: 2005-215171 (2005-08-01), None
International Search Report in PCT/JP2006/316151, dated Nov. 21, 2006.
Notification of Reasons for Refusal, dispatched Nov. 18, 2008, from the Japanese Patent Office in corresponding JP application No. 2007-531018, 4 pages including 1 page partial translation.

Affiliated with

Also associated with

Rating

Planar illuminating device does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Planar illuminating device, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Planar illuminating device will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-4162413