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:
Jul. 19, 2011
Filed:
May. 07, 2008
Applicants:
Ching-chuan Chen, Taichung, TW;
Yi-chun Lin, Taichung, TW;
Inventors:
Ching-Chuan Chen, Taichung, TW;
Yi-Chun Lin, Taichung, TW;
Assignee:
Sunplus Technology Co., Ltd, Hsinchu, TW;
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
G11B 7/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
A method for detecting a defect of an optical disc includes steps of: confirming an optical pickup head being accessing data in a track on state; determining a defective region of the optical disc according to a peak-to-peak value of a wobble signal; and, maintaining the optical pickup head being unchanged when the defective region is detected.