Patent ID: 6160772
Filing Date: 2000-12-12
Classification: G11B

Abstract:
A tilt control device for an optical disk device comprising:a tilt error detecting section that detects a tilt in radial tilt direction between direction of optical axis of an optical pickup at a point where the optical axis crosses an optical disk recording surface and direction perpendicular to the optical disk recording surface;a tilt actuator that drives the optical axis of the optical pickup in the radial tilt direction;a first tilt control circuit that drives the tilt actuator in accordance with a detected tilt error to correct the tilt error;a tilt amount detecting section that detects a tilt amount from a reference position in the radial tilt direction of the tilt actuator;an optical pickup radial direction position detecting section that detects a position of the optical pickup in the radial direction of the disk;a disk radial direction position-tilt amount characteristic storage section that prestores tilt amount characteristics necessary for correcting tilt errors at respective positions in the radial direction of the disk;a second tilt control circuit that drives the tilt actuator in accordance with detection by the tilt amount detecting section that realizes a corresponding tilt amount by using, as a target value, a tilt amount given by the disk radial direction position-tilt amount characteristics at the respective positions in the radial direction of the disk; anda control section that performs a tilt control by the first tilt control circuit during recording on or reproduction from the optical disk and, during a search operation for searching a desired position on the optical disk, performs a tilt control by the second tilt control circuit instead of the tilt control by the first tilt control circuit.