Projector and status protection method thereof

Details Projector and status protection method thereof Projector and status protection method thereof

2005-12-27

2005-12-27

Perkey, W. B. (Department: 2851)

Optics: image projectors

Temperature control

Blower

C353S052000

Reexamination Certificate

active

06979086

ABSTRACT:
A projector. A lamp serves as a light source for the projector. A starter turns on the lamp. An image processing system generates a projected image according to a video signal. A CPU controls the image processing system. A plurality of cooling fans positioned at least near the power supply, the lamp, or the image processing system to reduce the temperature around the cooling fans and respectively generating pulse signals corresponding to the rotational speed of the cooling fan. A charging circuit generates a continuous charging signal and generates a protection active signal to reset the CPU, shut down the power supply or the lamp.

REFERENCES:
patent: 5534854 (1996-07-01), Bradbury et al.
patent: RE36060 (1999-01-01), Miyashita
patent: 6262549 (2001-07-01), Yang et al.
patent: 6698898 (2004-03-01), Terami et al.
patent: 6702444 (2004-03-01), Takizawa et al.
patent: 6840625 (2005-01-01), Koyama et al.
patent: 2002/0118342 (2002-08-01), Ohfune et al.
patent: 2003/0227765 (2003-12-01), Kubo

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