Patent ID: 6501714
Filing Date: 2002-12-31
Classification: G11B

Abstract:
A method for controlling track jump on a disc by a pickup, the method comprising the steps of:generating a track jump signal having a first changing point when the pickup is located above a track and a second changing point when the pickup is located between adjacent tracks; generating an off track signal indicating a first state when the pickup is located above a track and a second state when the pickup is located apart from the track, wherein the off track signal is changed from the first state to the second state at a third changing point and changed from the second state to the first state at a fourth changing point; dividing a cycle of the track jump signal and the off track signal into four periods at the first to fourth changing points of the track jump signal and the off track signal; measuring the length of the divided four periods; and controlling the moving speed of the pickup in accordance with the lengths of the divided four periods.