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. 29, 2013
Filed:
Feb. 25, 2010
Applicants:
Hiroshi Hoshino, Tokyo, JP;
Akira Kitada, Tokyo, JP;
Inventors:
Hiroshi Hoshino, Tokyo, JP;
Akira Kitada, Tokyo, JP;
Assignee:
Mitsubishi Electric Corp., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11B 7/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
A disk drive determines, from eccentric amounts of individual prescribed rotation phases for one round of an optical disk, a rotation phase range in which a lens shift amount after tracking pulling-in of an object lens constituting an optical pickupdoes not exceed a movable range of the object lens in a preset tracking direction, sets the rotation phase range as a tracking pulling-in range, and carries out tracking pulling-in of the optical pickupwhile the rotation phase of the optical diskis placed within the tracking pulling-in range.