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:
May. 08, 2007
Filed:
Jun. 09, 2004
Jeong-hun Kim, Bucheon-si, KR;
Jeong-hun Kim, Bucheon-si, KR;
Abstract
An optical disk reproducing apparatus for compensating for a tracking error by using a real-time repetitive control and a method of driving the optical reproducing apparatus are provided. The optical disk reproducing apparatus repetitively compensates for the tracking error in a real time and with high resolution in accordance with the tracking error frequency by using a sampling frequency obtained by performing frequency multiplication on a disk rotation detection signal, corresponding to one rotation of a disk, without initially compensating the tracking error by using tracking error signals in one or several disk rotations. Accordingly, it is possible to cope with a frequency change of the tracking error due to a rotational frequency difference between inner and outer circumferences in a CLV mode or a rotational frequency change generated when the speed changes in a CAV mode. In addition, it is possible to stably compensate for the tracking error without additionally compensating for a phase or gain.