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. 08, 2011
Filed:
Aug. 18, 2008
Song-ruei Chen, Hsin-Chu, TW;
Chih-chang Cheu, Hsin-Chu, TW;
Rong-son Jeng, Hsin-Chu, TW;
Chun-cheng Chang, Hsin-Chu, TW;
Chung-ming Chen, Hsin-Chu, TW;
Song-Ruei Chen, Hsin-Chu, TW;
Chih-Chang Cheu, Hsin-Chu, TW;
Rong-Son Jeng, Hsin-Chu, TW;
Chun-Cheng Chang, Hsin-Chu, TW;
Chung-Ming Chen, Hsin-Chu, TW;
Lite-On It Corporation, Taipei, TW;
Abstract
The method prevents an optical disk from being scraped by an optical apparatus of a pickup head of an optical disc drive is disclosed, it mainly includes: moving the optical apparatus of the pickup head to a detection position in which the laser-light emitted from the pickup head focuses on the optical disk; detecting the first-detection position and setting a movement boundary according to the first-detection position, wherein the movement boundary has a upper boundary and a bottom boundary; preventing the optical apparatus from moving out of the movement boundary. The present method can be implemented without installing any additional apparatus in the original video disc player, and can prevent the optical disk and the inner apparatus of the optical disc drive from being scraped or damaged by the pickup head during a read/write process to increase the service life of the optical disk and the optical disc drive.