Patent ID: 6621773
Filing Date: 2003-09-16
Classification: G11B

Abstract:
A track seeking and track locking method in an optical storage device, comprising steps of:providing a first track-cross signal and a second track-cross signals, wherein a phase difference exists between the first and the second track-cross signals; providing a third track-cross signal, wherein a first protection interval and a second protection interval are obtained according to a state change of the third track-cross signal; providing a fourth track-cross signal, wherein a third protection interval and a fourth protection interval are obtained according to a state change of the fourth track-cross signal; maintaining the current state of the third track-cross signal within the first and the third protection intervals; making the state of the third track-cross signal referring to the first track-cross signal during other than the first and the third protection intervals; maintaining the current state of the fourth track-cross signal within the second and the fourth protection intervals; and making the state of the fourth track-cross signal referring to the second track-cross signal during other than the second and the protection intervals.