Patent ID: 6721239
Filing Date: 2004-04-13
Classification: G11B

Abstract:
An optical disc device comprising shifting means for shifting a convergent point of an optical beam focused on an information carrier in which an information track is divided in a radial direction and has an address part in a direction crossing the track on the information carrier,track displacement detection means for generating a signal corresponding to a relative position between the convergent point of the optical beam and the track, tracking control means for driving the shifting means according to an output signal from the track displacement detection means and controlling the convergent point of the optical beam to scan a surface of the track, track jumping means for shifting the convergent point of the optical beam from an arbitrary track to another track on the information carrier, jumping starting means for operating the track jumping means and starting an application of an accelerating signal, and reproduction speed measuring means for measuring a speed at which information on the information carrier is read out, wherein the jumping starting means operates the track jumping means based on a position of the address part on the information carrier and a measuring result from the reproduction speed measuring means.