Projection device having blower and/or lamp with feedback...

Details Projection device having blower and/or lamp with feedback... Projection device having blower and/or lamp with feedback...

2006-05-30

2006-05-30

Perkey, W. B. (Department: 2851)

Optics: image projectors

Temperature control

Blower

C353S085000, C353S121000, C353S119000, C396S231000, C396S571000, C315S117000, C315S118000

Reexamination Certificate

active

07052143

ABSTRACT:
In one example, a method for controlling temperature in a projection device, comprises measuring a plurality of temperatures in the projection device; averaging said plurality of temperatures to determine an averaged temperature; determining an error between a set-point temperature and said averaged temperature; and automatically adjusting a blower in said projection device based on said determined error. In another example, a method for controlling temperature in a projection device having a lamp and a blower comprises measuring temperature in the projection device; and selectively adjusting both a first signal to the blower and a second signal to the lamp based on said measured temperature to control temperature in the device.

REFERENCES:
patent: 4739396 (1988-04-01), Hyatt
patent: 5398041 (1995-03-01), Hyatt
patent: RE36060 (1999-01-01), Miyashita
patent: 6472828 (2002-10-01), Pruett et al.
patent: 6476560 (2002-11-01), Terami et al.
patent: 6595005 (2003-07-01), Immel
patent: 6621239 (2003-09-01), Belliveau
patent: 6637895 (2003-10-01), Fujimori et al.
patent: 6886942 (2005-05-01), Okada et al.
patent: 2003/0218602 (2003-11-01), Naito

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