Patent ID: 7808871

Claim:
A power control method for an optical drive, the method comprising the steps of: controlling a low power driving signal for driving a laser diode to operate at a low power level value and recording a initial value of the low power driving signal at a initial temperature through a closed-loop control mode; generating a power reference value at the initial temperature according to the initial value of the low power driving signal and a initial value of a high power driving signal which drives the laser diode to operate at a high power level value, wherein the power reference value is a negative pseudo power value while a current of the laser diode is zero; controlling the low power driving signal in a closed-loop control mode at a current temperature to obtain a current value of the low power driving signal; and generating the high power driving signal at the current temperature according to the current value of the low power driving signal, the low power level value, the power reference value and the high power level value.