Optical disk device and method for controlling the same
AssigneeKabushiki Kaisha Toshiba
InventorTakayuki Mori
Life of this patent
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Abstract
An optical pickup capable of selectively emitting blue light based and red light based laser beams is moved to a radial direction of an optical disk while emitting either of the laser beams, and it is detected whether or not a track pitch of the optical disk has changed based on a signal obtained from the optical pickup. In the case where a change in the track pitch of the optical disk has been detected, the blue light based laser beam is emitted from the optical pickup. In the case where a change in the track pitch of the optical disk is not detected, the red light based laser beam is emitted from the optical pickup.
Claims10
An optical disk device comprising:
- an optical pickup configured to read recording information from an optical disk and selectively emit a blue light based laser beam and a red light based laser beam;
- a moving section configured to emit any one of the laser beams from the optical pickup and move the optical pickup to a radial direction of the optical disk;
- a detector section configured to detect whether or not a track pitch of the optical disk has changed based on a signal obtained from the optical pickup when the optical pickup is moved in the radial direction of the optical disk by the moving section;
- and
- a control section configured to emit a blue light based laser beam from the optical pickup in the case where a change of the track pitch of the optical disk is detected by the detector section and emit a red light based laser beam from the optical pickup in the case where a change of the track pitch of the optical disk is not detected by the detector section.
An optical disk device control method for controlling an optical disk device comprising an optical pickup configured to read recording information from an optical disk and selectively emit a blue light based laser beam and a red light based laser beam, the method comprising:
- a first step of emitting either of the laser beams from the optical pickup and moving the optical pickup in a radial direction of the optical disk;
- a second step of detecting whether or not a track pitch of the optical disk has changed based on a signal obtained from the optical pickup when the optical pickup is moved in the radial direction of the optical disk in accordance with the first step;
- and
- a third step of emitting a blue light based laser beam from the optical pickup in the case where a change in the track pitch of the optical disk has been detected in the second step and emitting a red light based laser beam from the optical pickup in the case where the change in the track pitch of the optical disk is not detected in the second step.
Dependencies are inferred from the claim text.