| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a fan control device good in the efficiency of using energy, a projector equipped with the fan control device and a fan driving method by the fan control device. <P>SOLUTION: When temperature data are within a voltage adaptable range being the range of voltage data obtained when adjusted voltage Vadj output from a DA converter 7 and detected voltage Vt1 output from a temperature detection part are nearly coincident, a control part 4 turns off an analog switch SW1 and turns on an analog switch SW2, so that the DA converter 7 to which power supply is interrupted is stopped, and also a driving circuit 2 outputs driving voltage Vfd adjusted according to the detected voltage Vt1 from the temperature detection part 1. <P>COPYRIGHT: (C)2007,JPO&INPIT |
