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. 14, 2012
Filed:
Apr. 11, 2011
Gwo-huei Wu, Pan-Chiao, TW;
Kuo-jung Lan, Jhonghe, TW;
Yu-hsuan Lin, Hsinchu, TW;
You-wen Chang, Hsinchu, TW;
Gwo-Huei Wu, Pan-Chiao, TW;
Kuo-Jung Lan, Jhonghe, TW;
Yu-Hsuan Lin, Hsinchu, TW;
You-Wen Chang, Hsinchu, TW;
Mediatek Inc., Hsin-Chu, TW;
Abstract
A method and system for calibrating an initial driving signal for driving an optical pick-up head of an optical disk drive is provided. On one embodiment, said optical disk drive is utilized for reading or writing data on an optical disk, the optical disk includes a plurality of auto power control areas (APC areas) and a plurality of data areas, and the APC areas and the data areas are interleaved in between. In at least one of the APC areas that before the data areas for a normal data writing, an initial driving signal is used for the normal data writing to drive the optical pick-up head to emit laserbeam. A detected level of the laserbeam is then obtained. An update initial driving signal is then calibrated according to the detected level and a target level.