Dynamic information storage or retrieval – With servo positioning of transducer assembly over track... – Optical servo system
Reexamination Certificate
2007-01-23
2007-01-23
Edun, Muhammad (Department: 2655)
Dynamic information storage or retrieval
With servo positioning of transducer assembly over track...
Optical servo system
C369S044270, C369S053120
Reexamination Certificate
active
10385472
ABSTRACT:
A method of detecting a servo error, an apparatus therefor, a disk which maintains quantity of a servo error signal, a method of controlling a servo of an apparatus for recording data on and reproducing data from a disk, a method of detecting the tracking error, and a method of detecting tilt error of the apparatus. The apparatus for recording data on and reproducing data from the disk in which a recording area is divided into sectors, each sector has a header for indicating an address, each header has a first header and a second header which are recorded to deviate from the center of the track in opposite directions, and the first header and the second header have address areas in which the addresses of sectors are recorded and synchronous signal areas in which synchronous signals for detecting the address signals recorded in the address area are recorded, includes a reproducing signal generator for generating a reproducing signal including sum signals V1and V2of radial pairs, a sum signal RF_sum, and a push-pull signal RF_pp from an optical signal reflected from the disk, a header area detector for generating a header area signal including a header area from the reproducing signal received from the reproducing signal generator, a first synchronous signal level detector for receiving the output of the reproducing signal generator and detecting a magnitude Ivfo1of a first synchronous signal in the first header by being synchronized with the header area signal received from the header area detector, a second synchronous signal level detector for receiving the output of the reproducing signal generator and detecting a magnitude Ivfo3of a second synchronous signal in the second header by being synchronized with the header area signal received from the header area detector, and a balance calculator for calculating the balance of the magnitude Ivfo1of the first synchronous signal detected by the first synchronous signal level detector and the magnitude Ivfo3of the second synchronous signal detected by the second synchronous signal level detector. As a result, it is possible for the recording/reproducing apparatus to stably control a servo therein and maintain an optimal recording/reproducing state since the apparatus for detecting the servo error correctly detects the servo error state of the disk.
REFERENCES:
patent: 4589103 (1986-05-01), Tajima
patent: 4707817 (1987-11-01), Yoshio
patent: 5065382 (1991-11-01), Seko et al.
patent: 5130963 (1992-07-01), Kusano et al.
patent: 5327408 (1994-07-01), Belser
patent: 5523989 (1996-06-01), Ishibashi
patent: 5550799 (1996-08-01), Inoue et al.
patent: 5732054 (1998-03-01), Marino et al.
patent: 5986592 (1999-11-01), Nakagawa et al.
patent: 6064643 (2000-05-01), Tanoue et al.
patent: 6091700 (2000-07-01), Kobayashi
patent: 4028703 (1992-03-01), None
patent: 196 49 970 (1997-06-01), None
patent: 0210 330 (1987-02-01), None
patent: 0 210 330 (1987-02-01), None
patent: 210330 (1990-10-01), None
patent: 0467 498 (1992-01-01), None
patent: 0 798 711 (1997-01-01), None
patent: 2 307 770 (1997-06-01), None
patent: 2307770 (1997-06-01), None
patent: 2307770 (1997-06-01), None
patent: 59-38939 (1984-03-01), None
patent: 1-235081 (1989-09-01), None
patent: 4-76828 (1992-03-01), None
patent: 5-144024 (1993-06-01), None
patent: 9-63085 (1997-03-01), None
patent: 9-251639 (1997-09-01), None
patent: 10-11762 (1998-01-01), None
patent: 10-27366 (1998-01-01), None
patent: 10-208250 (1998-08-01), None
patent: WO 92/04712 (1992-03-01), None
U.S. Appl. No. 09/629,049, filed Jul. 31, 2000, Seong-sin Joo et al, Samsung Electronics Co., Ltd. Suwon-city, Republic of Korea.
Grohov, P.K., “Encyclopedia Dictionary of Electronics,” pp. 24-25, Moscow, Russian Language, 1993.
English Abstract of JP 09161274A, from which DE 196 49 970 A1 claims priority.
Chinese Office Action for Chinese Application No. 01104663.5.
Chung Chong-sam
Joo Seong-sin
Ko Jung-wan
Lee Kyung-geun
Ma Byung-in
Edun Muhammad
Stein, McEwen & Bui LLP
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