Color filtering device

Details Color filtering device Color filtering device

2011-03-15

2011-03-15

Epps, Georgia Y (Department: 2878)

Optics: image projectors

Polarizer or interference filter

C353S084000

Reexamination Certificate

active

07905601

ABSTRACT:
A color filtering device including a color filter, a plurality of polarization beam splitting units, a plurality of reflecting units, and a plurality of wave plates is provided. The color filter has a plurality of filtering parts and a plurality of light shielding parts alternately arranged thereon. Each of the polarization beam splitting units is disposed in front of one of the filtering parts and makes an angle with a corresponding filtering part. Each of the reflecting units is disposed in front of one of the light shielding parts and makes an angle with a corresponding light shielding part. Each of the wave plates is substantially parallel to one of the filtering parts. Each of the polarization beam splitting units is disposed between a pair of a wave plate and a filtering part. The color filtering device has both color filtering function and polarization conversion function.

REFERENCES:
patent: 6199987 (2001-03-01), Haba et al.
patent: 6933591 (2005-08-01), Sidhu et al.
patent: 7224633 (2007-05-01), Hovis et al.
patent: 2004/0057021 (2004-03-01), Lassar et al.
patent: 2004/0236967 (2004-11-01), Korcharz et al.
patent: 2005/0237487 (2005-10-01), Chang

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