Patent ID: 7965746

Claim:
A method for controlling laser power of an optical disk drive, wherein the method is used in an optical disc drive which comprises a first loop circuit and a second loop circuit, and the method comprises the steps of: (1) testing an outputted voltage in a real test to obtain a power outputting signal and form a power-controlling curve of the first loop circuit; (2) selecting two test points from the power-controlling curve of the first loop circuit; (3) adjusting an voltage outputted from the second loop circuit by aiming at achieving a power outputting signal defined by the two selected test points; (4) checking whether a power signal generated by the outputted voltage from the second loop circuit matches with the power outputting signal defined by the two test points, wherein if no match is found , the method returns to the step (3), and wherein if a match is found, the method proceeds to the step (5); (5) recording the voltage outputted from the second loop circuit; (6) calculating a gain of the first and second loop circuits under a same change of the power outputting signal checked in step 4; and (7) using the gained power-controlling curve of the first loop circuit as a power-controlling curve of the second loop circuit.