Method for driving optical pickup apparatus
AssigneeFunai Electric Co., Ltd.
InventorTakayuki Okamoto
Life of this patent
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Abstract
A method for driving an optical pickup apparatus which improves the durability of components that drive a movable lens that moves back and forth between an original position and a drive-limit position and achieves stable operability and an extended lifetime of the optical pickup apparatus performs a first step-drive in which a movable lens moves to an original-restoration start position by being driven a specified distance toward a drive-limit position, a second step-drive in which the movable lens thereafter moves to an original position by being driven toward the original position a distance equivalent to the distance from the drive-limit position to the original position, and a third step-drive in which the movable lens thereafter moves to a default position by being driven a specified distance.
Claims7
A method for driving an optical pickup apparatus that irradiates an optical disc with laser light to record or playback data while compensating for spherical aberration by moving a movable lens in a direction along an optical axis to change a luminous flux provided within an optical path between a laser diode and an objective lens, the optical pickup apparatus including a lens driving device arranged to move the movable lens back and forth between an original position and a drive-limit position, the method comprising the steps of:
- performing a first drive in which the movable lens moves to an original-restoration start position by being driven a specified distance toward the drive-limit position;
- performing a second drive in which the movable lens thereafter moves to the original position by being driven toward the original position a distance equivalent to a distance between the drive-limit position and the original position;
- and
- performing a third drive in which the movable lens thereafter moves to a default position by being driven a specified distance.
Dependencies are inferred from the claim text.