Optical disc apparatus
AssigneeFunai Electric Co., Ltd.
InventorsYasunori Kuwayama, Toshiaki Fukui
Life of this patent
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Abstract
In an optical disc apparatus for recording and/or reproducing data on an optical disc, a lens holder for holding an objective lens is dynamically moved not only in a direction perpendicular to a data recording face of an optical disc but also in a direction parallel to the data recording face and crossing substantially at right angle with data recording tracks on the data recording face when the optical disc is loaded on the optical disc apparatus so as to remove the stick of the movement of the objective lens due to adhesion of dust, break or deformation of the components.
Claims8
An optical disc apparatus for recording and/or reproducing data on and/or from an optical disc comprising:
- an optical pickup having a light source for emitting a light beam, an objective lens for focusing the light beam, a lens holder for holding the objective lens, a photo-sensor for receiving a reflected light from a data recording face of the optical disc, for converting variation of intensity of the reflected light to electric signals and for outputting the electric signals;
- a focusing coil for displacing the objective lens held on the lens holder in a direction perpendicular to the data recording face;
- a tracking coil for displacing the objective lens held on the lens holder in a direction parallel to the data recording face and crossing substantially at right angle with the data recording track;
- and
- a servo controller for driving at least one of the focusing coil and the tracking coil pulsatively so as to move the objective lens held on the lens holder dynamically prior to focusing the light beam on the data recording face for removing stick of the objective lens held on the lens holder.
Dependencies are inferred from the claim text.