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:
Feb. 16, 2010
Filed:
Nov. 15, 2006
Applicants:
Yasuhiro Muraoka, Gunma, JP;
Tatsushi Arai, Gunma, JP;
Inventors:
Yasuhiro Muraoka, Gunma, JP;
Tatsushi Arai, Gunma, JP;
Assignee:
Sanyo Electric Co., Ltd., Osaka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11B 7/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
An optical disc apparatus is disclosed that comprises a jitter value detecting circuit that detects a jitter value based on the signal read out from an optical disc; and a defocus value setting circuit that adjusts a defocus value used for moving an objective lens along the direction of a light axis when focusing of the objective lens to the optical disc is performed, based on the signal that has gone through the jitter value detecting circuit, and causes a defocus adjustment to be made based on the defocus value.