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. 16, 2012
Filed:
May. 06, 2008
Ming-tsang Wu, Taipei County, TW;
Yu-chun Lin, Hsin-Chu, TW;
Ying-feng Huang, Chia-Yi Hsien, TW;
Hua-ting Chi, Shulin, TW;
Ming-Tsang Wu, Taipei County, TW;
Yu-Chun Lin, Hsin-Chu, TW;
Ying-Feng Huang, Chia-Yi Hsien, TW;
Hua-Ting Chi, Shulin, TW;
Mediatek Inc., Hsin-Chu, TW;
Abstract
The invention provides an optical disk drive. The optical disk drive comprises a pickup head, a seek control device, a lens vision characteristic decoder, and an anti lens shift device. The pickup head comprises a sled and a lens for projecting a beam on a disk. The seek control device moves the sled, and shifts the lens with a shift distance relative to an origin at a center of the sled. The equalizer derives a servo signal from a reflection of the beam. The lens vision characteristic decoder obtains a vision characteristic of the lens according to the servo signal and determines a track-on direction according to the vision characteristic. The anti lens shift device triggers the seek control device to perform a track-on process according to the track-on direction.