Patent ID: 6777900
Filing Date: 2004-08-17
Classification: G06F

Abstract:
A method for controlling a heat dissipation of an electronic device by controlling a fan, the electronic device being operated in accordance with a regular clock frequency of a clock signal, comprising the following steps:(a) presetting a plurality of reference temperatures at least comprising a maximum reference temperature, a slowing-clock starting reference temperature, and a slowing-clock ending reference temperature; (b) detecting a temperature of the electronic device; (c) comparing the temperature of the electronic device with the maximum reference temperature; (d) rotating the fan in proportion to the temperature of the electronic device when the temperature of the electronic device is below the maximum reference temperature; (e) rotating the fan at a maximum rotational speed when the temperature of the electronic device is beyond the maximum reference temperature; (f) comparing the temperature of the electronic device with the slowing-clock starting reference temperature; (g) rotating the fan at a maximum rotational speed and supplying a slower clock frequency with respect to the regular clock frequency of the clock signal to the electronic device when the temperature of the electronic device is beyond both the maximum reference temperature and the slowing-clock starting reference temperature; and (h) maintaining the maximum rotational speed of the fan and supplying the slower clock frequency of the clock signal to the electronic device until the temperature of the electronic device drops below the slowing-clock ending reference temperature.