Dual lamp illumination system

Details Dual lamp illumination system Dual lamp illumination system

2007-05-29

2007-05-29

Fuller, Rodney (Department: 2851)

Optics: image projectors

Plural

C353S099000

Reexamination Certificate

active

11029625

ABSTRACT:
A dual lamp illumination system adapted for a projection display system. The dual lamp illumination system includes a first illumination module and a second illumination module, a beam deflecting unit, and a light homogenizer. The first and the second illumination modules each includes a light source, and an elliptically-shaped housing having an interior reflective coating. The light sources each generates an optical beam comprising converging optical rays such that optical beams each has an angular distribution range of [−P, +Q] degrees, where P and Q are preferably 30. The beam deflecting unit reflects at least one of the optical beams from the first and the second illumination module and couples the optical beams to form a multiplexed beam. The light homogenizer is then for homogenizing the multiplexed beam. The invention achieves throughput of 1.5×–1.7× higher gain than single lamp illumination systems useful particularly in a projection display system.

REFERENCES:
patent: 6505939 (2003-01-01), Bierhuizen et al.
patent: 7090357 (2006-08-01), Magarill et al.
patent: 7101049 (2006-09-01), Shindoh

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