Color wheel and optical device employing same

Details Color wheel and optical device employing same Color wheel and optical device employing same

2011-05-10

2011-05-10

Chang, Audrey Y (Department: 2872)

Optical: systems and elements

Absorption filter

With support or frame

C359S885000, C353S084000

Reexamination Certificate

active

07940484

ABSTRACT:
A projector includes a light source assembly, a digital micro-mirror device, and a projection lens. The light source assembly includes a lamp and a color wheel positioned for receiving light generated by the lamp. The color wheel includes a motor having a contacting portion, a filter, a light-blocker, and a light-isolating sheet. The filter is mounted on the contacting portion of the motor and includes a first area and a second area. Light beams used for forming an image only pass through the first area. The light-blocker is disposed on the filter opposite to the motor. The light-isolating sheet is disposed on the first area and positioned between the filter and the motor and configured for isolating the light beams arrived on the second area.

REFERENCES:
patent: 4076393 (1978-02-01), Bates
patent: 6793345 (2004-09-01), Dho
patent: 7233450 (2007-06-01), Kao et al.
patent: 2007/0053089 (2007-03-01), Yu et al.
patent: 2008/0151402 (2008-06-01), Hsu
patent: 2009/0008625 (2009-01-01), Tsai et al.

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