Patent ID: 6955434

Claim:
A method for adjusting cooling in a projection system, said projection system comprising a fan, a louver and a sensor installed between said fan and said louver, said method comprising the following steps: (1) allowing said fan to rotate at a predetermined rotational speed to drive air and said louver to be at a predetermined open rate when said system is turned on; (2) detecting a temperature of said air through a sensor; (3) increasing an open rate of said louver gradually and then increasing a rotational speed of said fan gradually when said temperature of said air is risen over a predetermined temperature; (4) decreasing said rotational speed of said fan gradually and then decreasing said open rate of said louver gradually when said temperature of said air is lowered down and said rotational speed is higher than said predetermined rotational speed; and (5) closing said louver when said system is turned off.