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. 29, 2009
Filed:
Sep. 09, 2004
Byung-ju Dan, Gyeonggi-Do, KR;
Jong-man Kim, Seoul, KR;
Hyo-kune Hwang, Gyeonggi-Do, KR;
Wae-yeul Kim, Gyeonggi-Do, KR;
Nam-woong Kim, Seoul, KR;
Byung-Ju Dan, Gyeonggi-Do, KR;
Jong-Man Kim, Seoul, KR;
Hyo-Kune Hwang, Gyeonggi-Do, KR;
Wae-Yeul Kim, Gyeonggi-Do, KR;
Nam-Woong Kim, Seoul, KR;
LG Electronics Inc., Seoul, KR;
Abstract
Disclosed is a method of preventing optical recording media from being fractured and apparatus thereof, which enable to prevent an optical disc of an optical disc drive from being fractured due to a crack. The method and apparatus comprise: detecting a first tracking error signal outputted from a data recording/reproducing apparatus when the optical recording media are rotated at a first speed; detecting a second tracking error signal outputted from the data recording/reproducing apparatus when the optical recording media are rotated at a second speed; determining whether or not the crack on the optical disc exists on the basis of the first tracking error signal and the second tracking error signal; and stopping an operation of the data recording/reproducing apparatus when the optical recording media have the crack.