Reflective liquid crystal projector

Details Reflective liquid crystal projector Reflective liquid crystal projector

2006-02-14

2006-02-14

Koval, Melissa Jan (Department: 2851)

Optics: image projectors

Polarizer or interference filter

C353S033000, C353S081000, C353S099000, C353S119000, C349S009000, C359S490020

Reexamination Certificate

active

06997559

ABSTRACT:
In a reflective liquid crystal projector, illumination light is separated into blue, green and red illumination light bundles. The three color illumination light bundles are respectively modulated through three reflective liquid crystal elements into blue, green and red color optical images. A first polarizing beam splitter prism directs the blue optical image to a first incident surface of a recombination prism, whereas a second polarizing beam splitter prism directs the red and green optical images to a second incident surface of the recombination prism. The three color optical images are recombined through the recombination prism into a full-color image, and the full-color image is projected through a projection lens onto a screen. The first and the second polarizing beam splitter prisms and the recombination prim are fixed merely at their bottom surfaces to a prism base plate.

REFERENCES:
patent: 5808795 (1998-09-01), Shimomura et al.
patent: 6705731 (2004-03-01), Inoue
patent: 6749305 (2004-06-01), Tsao et al.
patent: 6769779 (2004-08-01), Ehrne et al.
patent: 2001-42425 (2001-02-01), None

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