Patent ID: 6545957
Filing Date: 2003-04-08
Classification: G11B

Abstract:
A method for controlling track jumps of an optical pickup in an optical disc apparatus for recording and reproducing data to and from an optical disc, wherein said optical pickup is moved to a target track of said optical disc, comprising the steps of:when said optical pickup has jumped to a single track located halfway between a current position and said target track, computing a speed difference between a target jump speed set for said single track, and an actually measured jump speed over said single track; outputting one of an acceleration signal, a deceleration signal and a speed maintaining signal representing the magnitude of the speed difference between the target and the measured jump speeds as a control signal for controlling the speed for said optical pickup to jump to a next track immediately following to said single track; adjusting the jump speed difference with respect to said single track based on at least one of speed differences between the target and the measured jump speeds regarding a plurality of tracks jumped previously to said single track, and by resorting to predetermined relational expressions; and outputting one of said acceleration signal, said deceleration signal and said speed maintaining signal on the basis of the adjusted jump speed difference as a control signal for a jump over the next track.