Color wheel apparatus and optical engine having the same

Details Color wheel apparatus and optical engine having the same Color wheel apparatus and optical engine having the same

2008-03-25

2008-03-25

Dowling, William C. (Department: 2851)

Optics: image projectors

Color filter

C359S892000, C348S743000

Reexamination Certificate

active

11258039

ABSTRACT:
Disclosed is a color wheel apparatus for a DLP type display device having a color wheel unit, which has a color filter and a rotation part for supporting the color filter and rotating integrally with the color filter; a color wheel supporter for rotatably supporting the color wheel unit; a sensor having a light emitter provided in the color wheel supporter and emitting light to the rotation part, and a light receiver to receive the light reflected from the rotation part; and an index part patterned on a predetermined region of a circumference of the rotation part to irregularly reflect the light emitted from the light emitter.

REFERENCES:
patent: 5868482 (1999-02-01), Edlinger et al.
patent: 7199952 (2007-04-01), Niwa et al.
patent: 2005/0179824 (2005-08-01), Ahn
patent: 2006/0007408 (2006-01-01), Kim
patent: 2006/0132720 (2006-06-01), Goo
patent: 02-148509 (1990-06-01), None
patent: 08-214580 (1996-08-01), None
patent: 2001-337390 (2001-12-01), None
patent: 2003-57424 (2003-02-01), None
patent: 1996-33146 (1996-09-01), None

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