Patent ID: 7830757

Claim:
A tracking control method for use in an optical disk drive to read/write an optical disk, comprising steps of: measuring a static offset according to an input tracking error signal generated by a detector receiving a single spot reflected from the optical disk; subtracting the static offset from the input tracking error signal to be a tracking error signal without the static offset; implementing a tracking servo loop with a frequency compensator-loop; feeding the tracking error signal without static offset into the tracking servo loop; using a first memory to learn a periodical offset in the tracking servo loop; opening the tracking servo loop and driving an actuator by the periodical offset; using a second memory to learn a dynamical offset according to the periodical offset; subtracting the static offset and the dynamical offset from the input tracking error signal to be a tracking error signal without the static and dynamical offset; and closing the tracking servo loop and feeding the tracking error signal without the static and dynamical offset into the closed tracking servo loop.