Light recycling colored light source and method of using

Details Light recycling colored light source and method of using Light recycling colored light source and method of using

2006-08-01

2006-08-01

Mahoney, Christopher (Department: 2851)

Optics: image projectors

Polarizer or interference filter

C353S031000, C353S084000, C349S018000

Reexamination Certificate

active

07083282

ABSTRACT:
A light source for sequential or scrolling displays that recycles otherwise unusable light. The recycling is achieved by reflecting that portion of the light spectrum that will not be used by a pixel back into the light pipe where the light is rehomogenized or redistributed. The rehomogenized or redistributed light may then be used by other pixels that can uses that portion of the light spectrum. The reflection or transmission of the light through a reflective polarizer is controlled by a polarization rotation element that rotates certain portions of the spectrum according to excitation.

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Markus Duelli, Tony McGettigan, and Clark Pentico, “Polarization Recovery System Based on Light Pipes”, Projection Displays VIII, Proceedings of SPIE, 2002, pp. 9-16, vol. 4657.
Peter Janssen, Jeffrey A. Shimizu, John Dean, Remus Albu, “Design Aspects of a Scrolling Color LCoS Display”, Displays, 2002, pp. 99-108, 23.

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