Projector with foreign matter detecting means

Details Projector with foreign matter detecting means Projector with foreign matter detecting means

2005-08-16

2005-08-16

Nguyen, Judy (Department: 2851)

Optics: image projectors

Reflector

Plural

C353S122000, C353S119000

Reexamination Certificate

active

06929370

ABSTRACT:
A projector has an image generating device for generating an image, and a housing, having the image generating device disposed therein and having an opening defined therein for emitting therethrough projection light representing the image from the image generating device. A projection mirror is mounted on an outer surface of the housing for reflecting the projection light to project the image onto a projection surface. An optical system is disposed in the opening for applying the projection light to the projection mirror. The projector also has a foreign matter detector for detecting foreign matter which enters a light path of the projection light between the optical system and the projection mirror.

REFERENCES:
patent: 4765733 (1988-08-01), Negishi
patent: 5077467 (1991-12-01), Barron et al.
patent: 6231191 (2001-05-01), Shiraishi et al.
patent: 6705356 (2004-03-01), Barton et al.
patent: 2002/0122161 (2002-09-01), Nishida et al.
patent: 2004/0031095 (2004-02-01), Yamamoto
patent: 11-119343 (1999-04-01), None

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