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:
Sep. 21, 2010
Filed:
Aug. 24, 2006
Masatoshi Nishino, Chiba, JP;
Masatoshi Nishino, Chiba, JP;
Sony Corporation, Tokyo, JP;
Abstract
A disc-driving apparatus has an optical pickup including an objective lens. The objective lens has an optical axis that is met on a line excluding a central axis of revolution of a disc. The apparatus has storage device that stores plural correction values obtained by detecting fluctuations in amplitude of a tracking error signal with respect to a radial direction of the disc or a quantity of de-tracking with respect to the radial direction thereof. The apparatus has control device that reads the correction value from the storage device and, when the optical pickup is operating, corrects the tracking error signal to conduct servo control based on the corrected tracking error signal.