The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 22, 2002
Filed:
Feb. 08, 2000
Sony Corporation, Tokyo, JP;
Abstract
A slide-feed drive part ( ) uses a stepping motor as a slide-feed motor for changing the position of a optical pick-up ( ) with respect to the rotation surface of an optical disk ( ), and has a micro-controller ( ) provided therein and a slide-feed motor controller ( ) both for correcting drive current waveforms to drive the stepping motor. Therefore, by correcting the motor driving waveforms, the optical pick-up ( ) can be linearly moved with respect to the rotation of the slide-feed motor ( ). It is thereby possible to do away with a position sensor and make a fine positional control of the optical pick-up ( ) with no variation. As a result of this, it is possible to provide an optical disk driving apparatus, an optical disk driving method, and an optical disk apparatus, which enhances the linearity of the rotation of the motor with a simple construction.