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:
Sep. 04, 2007
Filed:
Aug. 11, 2004
Shih-hao KE, Ta Li, TW;
Chih-hsien Kao, Hsin Chu, TW;
Shih-Hao Ke, Ta Li, TW;
Chih-Hsien Kao, Hsin Chu, TW;
Mediatek Inc., Hsin Chu, TW;
Abstract
A method for calibrating tilt control values of a PUH in real time is applied to an optical disk drive and includes the steps of: creating a look-up table, the look-up table including several optical disk data/physical addresses of track zones and the corresponding tilt control values; reading tilt control values as reference values from the look-up table corresponding the track position of a PUH; calculating a current tilt control value according to the reference values; controlling the PUH according to the current tilt control value; reading a decoding error generated during a decoding procedure of the optical disk drive; calibrating the tilt control values and updating the look-up table. When the decoding error is larger than a decoding error threshold, the tilt control values of the track zone is calibrated. Hence, even an irregularly deformed optical disk can be calibrated to obtain better tilt control values.