Optics: image projectors – Reflector – Plural
Reexamination Certificate
2007-01-19
2010-11-16
Dowling, William C (Department: 2878)
Optics: image projectors
Reflector
Plural
C353S094000, C313S512000, C362S555000, C362S800000, C385S133000, C385S901000
Reexamination Certificate
active
07832878
ABSTRACT:
The present invention generally relates to video and/or television projection systems, and more particularly, to LED based light source systems utilizing generally non-rotationally symmetric, preferably oblong or rectangular, non-imaging collection optics for providing improved projection systems relative to arc lamp and other LED based light source systems. The non-rotationally symmetric non-imaging collection optics are configured to operate with LEDs to provide preferred, generally, uniform light distributions whose étendues match those of downstream applications such as those encountered in projection systems. Also provided are various arrangements for coupling LED output to the entrance aperture of collection optics and for coupling the outputs from a plurality of collection optic outputs to form single beams of illumination of preferred patterns, intensities, and color.
REFERENCES:
patent: 4915479 (1990-04-01), Clarke
patent: 6205998 (2001-03-01), Winston
patent: 6272269 (2001-08-01), Naum
patent: 6318863 (2001-11-01), Tiao et al.
patent: 6871982 (2005-03-01), Holman et al.
patent: 6967986 (2005-11-01), Kowarz et al.
patent: 6968103 (2005-11-01), Schroll et al.
patent: 7001084 (2006-02-01), Carpenter et al.
patent: 7153015 (2006-12-01), Brukilacchio
patent: 7210806 (2007-05-01), Holman et al.
patent: 7234820 (2007-06-01), Harbers et al.
patent: 7455410 (2008-11-01), Furusawa et al.
patent: 7481538 (2009-01-01), Furusawa et al.
patent: 2002/0114168 (2002-08-01), Pelka et al.
patent: 2005/0169579 (2005-08-01), Temkin et al.
patent: 2005/0224826 (2005-10-01), Keuper et al.
patent: 2005/0243570 (2005-11-01), Chaves et al.
patent: 2005/0275819 (2005-12-01), Tolbert et al.
patent: 2006/0043400 (2006-03-01), Erchak et al.
patent: 2006/0189013 (2006-08-01), Schardt et al.
Welford, W.T. and Winston, R., “High Collection Nonimaging Optics”, Academic Press, pp. 55-64 and pp. 82-84 (1989).
International Search Report and Written Opinion from International Patent Application No. PCT/US07/01571 mailed on May 1, 2008.
Brukilacchio Thomas J.
Demilo Charles A.
Caufield Francis J.
Dowling William C
Innovations In Optics, Inc.
LandOfFree
Light emitting diode projection system does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Light emitting diode projection system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Light emitting diode projection system will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4242628