Dust detection device for air filter and projector utilizing...

Details Dust detection device for air filter and projector utilizing... Dust detection device for air filter and projector utilizing...

2007-06-26

2007-06-26

Koval, Melissa J (Department: 2851)

Optics: image projectors

Temperature control

Blower

C353S060000, C353S061000, C353S119000, C318S280000, C250S222200, C250S239000, C095S280000, C348S748000

Reexamination Certificate

active

11016090

ABSTRACT:
A projector and a dust detection device for an air filter thereof. The projector comprises a lamp, a fan, an filter, and a dust detection device. The lamp comprises a housing with an inlet and an exit. The fan is disposed in front of the inlet of the housing, and generates airflow to dissipate heat produced by the lamp. The air filter is disposed in front of the exit of the housing, and filters the airflow passing around the lamp. The dust detection device is disposed behind the air filter, and detects the state of the filtered airflow.

REFERENCES:
patent: 5762689 (1998-06-01), Hunziker
patent: 6364489 (2002-04-01), Eguchi
patent: 6805446 (2004-10-01), Arai et al.
patent: 7120006 (2006-10-01), Sekoguchi et al.
patent: 7161315 (2007-01-01), Hsu
patent: 2004/0188598 (2004-09-01), Kawai

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