| 摘要 |
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. |
