Backlight using LED parallel to light guide surface

Details Backlight using LED parallel to light guide surface Backlight using LED parallel to light guide surface

2008-07-10

2011-11-22

Crowe, David (Department: 2885)

Illumination

Edge lighted panel

Housing

C362S612000, C362S609000

Reexamination Certificate

active

08061884

ABSTRACT:
Various embodiments of corner-coupled backlights are described, where one or more white light LEDs are optically coupled to a truncated corner edge of a solid rectangular light guide backlight. The one or more LEDs are mounted in a small reflective cavity, whose output opening is coupled to the truncated corner of the light guide. The reflective cavity provides a more uniform light distribution at a wide variety of angles to the face of the truncated corner to better distribute light throughout the entire light guide volume. To enable a thinner light guide, the LED die is positioned in the reflective cavity so that the major light emitting surface of the LED is parallel to the top surface of the light guide. The reflective cavity reflects the upward LED light toward the edge of the light guide.

REFERENCES:
patent: 4143394 (1979-03-01), Schöberl
patent: 6036328 (2000-03-01), Ohtsuki et al.
patent: 6536914 (2003-03-01), Hoelen et al.
patent: 6710377 (2004-03-01), Shimonura
patent: 6761461 (2004-07-01), Mizutani et al.
patent: 6789910 (2004-09-01), Kimura et al.
patent: 6953952 (2005-10-01), Asakawa
patent: 7001058 (2006-02-01), Inditsky
patent: 7021813 (2006-04-01), Lee et al.
patent: 7048427 (2006-05-01), Fujino et al.
patent: 7157853 (2007-01-01), Imai et al.
patent: 7176623 (2007-02-01), Nitta et al.
patent: 7204635 (2007-04-01), Kimura et al.
patent: 7239792 (2007-07-01), Kim
patent: 7422358 (2008-09-01), Weng et al.
patent: 7491977 (2009-02-01), Fukasawa
patent: 7505109 (2009-03-01), Cheng et al.
patent: 7513661 (2009-04-01), Hamada et al.
patent: 7527408 (2009-05-01), Hwang
patent: 2002/0054489 (2002-05-01), Hirayama
patent: 2002/0163790 (2002-11-01), Yamashita et al.
patent: 2003/0189821 (2003-10-01), Moon
patent: 2004/0012944 (2004-01-01), Suzuki et al.
patent: 2004/0065894 (2004-04-01), Hashimoto et al.
patent: 2005/0141244 (2005-06-01), Hamada et al.
patent: 2005/0152157 (2005-07-01), Nomura
patent: 2005/0157500 (2005-07-01), Chen et al.
patent: 2006/0001037 (2006-01-01), Schard et al.
patent: 2006/0098453 (2006-05-01), Kuo
patent: 2006/0164864 (2006-07-01), Arihara
patent: 2006/0170335 (2006-08-01), Cho et al.
patent: 2006/0181902 (2006-08-01), Tamura et al.
patent: 2006/0226437 (2006-10-01), Fujita et al.
patent: 2006/0262554 (2006-11-01), Mok et al.
patent: 0974785 (2000-01-01), None
patent: 2006189796 (2006-07-01), None
patent: WO 2005114045 (2005-12-01), None
International Search Report and Written Opinion, 10 pages.

Affiliated with

Also associated with

Rating

Backlight using LED parallel to light guide surface does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Backlight using LED parallel to light guide surface, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Backlight using LED parallel to light guide surface will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-4304245