Dynamic information storage or retrieval – With servo positioning of transducer assembly over track... – Optical servo system
Reexamination Certificate
2007-05-08
2007-05-08
Huber, Paul W. (Department: 2627)
Dynamic information storage or retrieval
With servo positioning of transducer assembly over track...
Optical servo system
C369S053140
Reexamination Certificate
active
10863919
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.
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patent: 6785205 (2004-08-01), Park et al.
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patent: 02-76763 (2002-10-01), None
patent: 00/65582 (2000-11-01), None
Kim, Jeong-hun, et al.; “Adaptive Repetitive Control for an Eccentricity Compensation of Optical Disk Driver,” Proceeding of the KIEE Summer Annual Conference 2003, p. 2146-2148.
Huber Paul W.
Mills & Onello LLP
Samsung Electronics Co,. Ltd.
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