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:
Jun. 01, 2010
Filed:
Jul. 20, 2007
Yuichi Suzuki, Kanagawa, JP;
Yuichi Suzuki, Kanagawa, JP;
Sony Corporation, , JP;
Abstract
An optical disc drive apparatus may include an optical pickup that moves along a transportation shaft provided along a radial direction of an optical disc and picks up reflected light after emitting an optical beam via an objective lens to the optical disc; a drive section that controls the objective lens to adjust an angle of the optical beam; an angular velocity detection section that detects an angular velocity around the transportation shaft; storage means for storing coefficients from which the skew of the optical disc around a virtual axis perpendicular to the transportation shaft is calculated using the angular velocity; a skew estimation section that calculates a skew estimate value by multiplying the coefficient by the angular velocity; and a drive signal generation section that generates a drive signal based on the skew estimate value to enable the drive section to adjust the angle of the optical beam.