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:
Oct. 14, 2008
Filed:
Jun. 01, 2004
Ko-hsin Ou Yang, Taipei, TW;
Ko-Hsin Ou Yang, Taipei, TW;
Behavior Tech Computer Corp., Sijhih, TW;
Abstract
The invention is disclosed a correcting method for differential push-pull(DPP) tracking error signals of an optical disk drive. A Step (A) divides a CD into a plurality of areas according to magnitudes of the peak values of the DPP tracking error signals, wherein the difference between every two DPP peak values of neighboring areas is larger than a predetermined value. A step (B) measures respectively average DPP peak values of every area in the step A for calculating a gain value of each area according to the average DPP peak values and an ideal DPP peak value under a non-track locking state. A step (C) does gain correction for the DPP tracking error signals according to the corresponding gain value of the area accessed when in accessing to an area of the CD.