US 7,591,433 B2
Method for controlling fan speed
Hsuan Cheng Wang, Taipei (Taiwan); Chun-Hung Lin, Taipei (Taiwan); and Chi-Hsin Lin, Taipei (Taiwan)
Assigned to Compal Electronics, Inc., Taipei (US)
Filed on Jul. 25, 2005, as Appl. No. 11/161,132.
Claims priority of application No. 93127420 A (TW), filed on Sep. 10, 2004.
Prior Publication US 2006/0054713 A1, Mar. 16, 2006
Int. Cl. F24F 7/00 (2006.01); H05K 7/20 (2006.01)
U.S. Cl. 236—49.3  [62/186; 62/259.2; 361/695] 10 Claims
OG exemplary drawing
 
1. A method of controlling a fan speed of a fan system for a mobile electronic device, comprising:
an embedded controller (EC) to detect and determine a power source of the mobile electronic device;
wherein when the power source is an external-connection power source, a first fan control table is used to control the fan system, and the fan system comprises a plurality of fans;
wherein when the power source is a battery power, a second fan control table is used to control the fan system, and when the first fan control table is used to control the fan system, a start time for one of the fans in the first fan control table is prior to a start time used by the second fan control table to control the fan system.