Optics: image projectors – Temperature control
Reexamination Certificate
2005-11-22
2005-11-22
Mahoney, Christopher (Department: 2851)
Optics: image projectors
Temperature control
Reexamination Certificate
active
06966652
ABSTRACT:
The present invention provides a method and an apparatus for adjusting a cooling period according to a current condition of a system. The system includes an electronic device and a cooling device. The system has a predetermined temperature value Tp and a first temperature value T1. In the present invention, a second temperature value T2is detected. Then, a temperature difference X is obtained by subtracting the second temperature value T2from the first temperature value T1. The present invention compares the temperature difference X with the predetermined temperature value Tp. When the temperature difference X is greater than the predetermined temperature value Tp, the present invention stops the cooling operation. Otherwise, the present invention calculates a cooling time period K based on the temperature difference X, and proceeds with cooling for cooling time period K.
REFERENCES:
patent: 3841746 (1974-10-01), Chase et al.
patent: 5171518 (1992-12-01), Barshay et al.
patent: 6588907 (2003-07-01), Billington et al.
patent: 6702444 (2004-03-01), Takizawa et al.
patent: 6763711 (2004-07-01), Nair et al.
Chao Ren-Cheng
Lai Chih-Min
Benq Corporation
Mahoney Christopher
Snell & Wilmer L.L.P.
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