Method for shutting off projector including turning off the...

Details Method for shutting off projector including turning off the... Method for shutting off projector including turning off the...

2007-06-12

2010-06-15

Le, Que T (Department: 2878)

Radiant energy

Photocells; circuits and apparatus

Photocell controls its own optical systems

C250S221000

Reexamination Certificate

active

07737387

ABSTRACT:
A method for shutting off a projector having a fan and a light source is provided. The method includes the following steps. The power of the light source is reduced from a first power to a second power and the speed of the fan is increased from a first speed to a second speed after the projector receiving a first command. Then, a process is executed for shutting off the light source and the fan after the projector receiving a second command. The above-mentioned method is capable of not only preventing the projector from damage result from over-shooting, but also shortening the time needed to shut off the projector.

REFERENCES:
patent: 6588907 (2003-07-01), Billington et al.
patent: 200549464 (2005-02-01), None

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