Patent ID: 7639590

Claim:
A power control device of single base power for an optical read/write module of an optical disk drive, wherein the optical read/write module generates a power feedback signal and a temperature signal, the device comprising: a current compensating module generating an operating current compensating signal and a threshold compensating signal according to the power feedback signal, the temperature signal, a base power signal and a function relationship between the temperature signal and the threshold current of the optical read/write module; a current computing module receiving the operating current compensating signal to compute a first operating current signal and a second operating current signal based on the operating current compensating signal according to the base power signal and a reference power signal; and a current integrating module having a compensating unit and an integrating unit, wherein the compensating unit receives the threshold current compensating signal and the first operating current signal to sum the threshold current compensating signal and the first operating current signal to output a first threshold current signal, the integrating unit receives the first threshold current signal and the second operating current signal to generate a power control signal so as to drive the optical read/write module, wherein the optical read/write module has a first current control unit and a second current control, the first current control unit and the second current control are driven respectively corresponding to the first threshold current signal and the second operating current signal.