Multi-primary LED projection system

Details Multi-primary LED projection system Multi-primary LED projection system

2011-03-15

2011-03-15

Dowling, William C (Department: 2878)

Optics: image projectors

Composite projected image

Multicolor picture

C353S094000, C353S020000, C353S008000, C348S771000, C349S009000

Reexamination Certificate

active

07905605

ABSTRACT:
A multi-primary light emitting diode system includes the use of a polarization based dichroic element to combine light from different color channels. At least one of the color channels includes two light emitting diodes that produce light with a different range of wavelengths. The use of the polarization based dichroic element permits overlapping spectra from different color channels to be combined without loss. Accordingly, the brightness of the system is improved relative to conventional systems in which losses occur when combining overlapping spectra from different channels.

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International Search Report and Written Opinion, 11 pages.
International Search Report and Written Opinion, 11 pages, Apr. 28, 2008.

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