System and method for intelligent information handling...

Details System and method for intelligent information handling... System and method for intelligent information handling...

2007-08-21

2007-08-21

Mahoney, Christopher (Department: 2851)

Optics: image projectors

Temperature control

C353S057000, C348S748000

Reexamination Certificate

active

11044115

ABSTRACT:
An information handling system projector cooling fan runs for a variably defined time after its lamp is turned off in order to adequately cool the projector without running the cooling fan for an excessive cool down period. In one embodiment, the cooling fan runs after lamp shut down until one or more thermocouples detects a predetermined temperature associated with the projector. In an alternative embodiment, fan cool down time varies based on the length of time the lamp was on before shutdown. The cool down thermal gradient is selectable between a convenience mode, in which an increased cooling gradient allows quicker cooling fan shut down, and a long-life mode, in which a decreased cooling gradient preserves lamp life.

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