Light source

Details Light source Light source

2004-04-28

2008-12-23

O'Shea, Sandra L. (Department: 2875)

Illumination

Light fiber, rod, or pipe

Light emitting diode

C362S026000, C362S231000, C353S031000, C353S094000, C385S033000

Reexamination Certificate

active

07467885

ABSTRACT:
A light source, such as for a projection system, having a plurality of semiconductor chips and at least two different, electromagnetic-radiation-emitting chip types with different emission spectra, each semiconductor chip having a chip coupling-out area through which radiation is coupled out. Furthermore, the light source has a plurality of primary optical elements, each semiconductor chip being assigned a primary optical element, which in each case has a light input and a light output and reduces the divergence of at least part of the radiation emitted by the semiconductor chip during the operation thereof. The semiconductor chips with the primary optical elements are arranged in at least two groups that are spatially separate from one another, with the result that the groups emit separate light cones during operation of the semiconductor chips. The separate light cones of the groups are superposed by means of a secondary optical arrangement to form a common light cone.

REFERENCES:
patent: 4951179 (1990-08-01), Machida
patent: 5604607 (1997-02-01), Mirzaoff
patent: 5727108 (1998-03-01), Hed
patent: 5775792 (1998-07-01), Wiese
patent: 5810469 (1998-09-01), Weinreich
patent: 5813752 (1998-09-01), Singer et al.
patent: 5847507 (1998-12-01), Butterworth et al.
patent: 5966393 (1999-10-01), Hide et al.
patent: 6172816 (2001-01-01), Tadic-Galeb et al.
patent: 6220722 (2001-04-01), Begemann
patent: 6252155 (2001-06-01), Ortabasi
patent: 6318863 (2001-11-01), Tiao et al.
patent: 6499860 (2002-12-01), Begemann
patent: 6509651 (2003-01-01), Matsubara et al.
patent: 6527411 (2003-03-01), Sayers
patent: 6540377 (2003-04-01), Ota et al.
patent: 6814470 (2004-11-01), Rizkin et al.
patent: 7026755 (2006-04-01), Setlur et al.
patent: 7083302 (2006-08-01), Chen et al.
patent: 2002/0030194 (2002-03-01), Camras et al.
patent: 2002/0085279 (2002-07-01), Chuang et al.
patent: 2004/0141104 (2004-07-01), Yu et al.
patent: 0322 106 (1988-11-01), None
patent: 0 869 388 (1997-09-01), None
patent: 0 985 952 (1999-03-01), None
patent: 1 003 062 (1999-06-01), None
patent: 985952 (2000-03-01), None
patent: 1 098 535 (2000-10-01), None
patent: 1-143367 (1989-06-01), None
patent: 9-265807 (1997-10-01), None
patent: WO 98/20475 (1998-05-01), None
Schnitzer et al., “30% external quantum efficiency from surface textured, thin-film light-emitting diodes”, Applied Physics Letter vol. 63, No. 16; pp. 2174-2176, Oct. 18, 1993.
W. T. Welford et al., “High Collection Nonimaging Optics”, Academic Press, Inc., 1989.

Affiliated with

Also associated with

Rating

Light source 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 source, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Light source will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-4044402