Dynamic information storage or retrieval – With servo positioning of transducer assembly over track... – Optical servo system
Patent
1997-05-28
2000-04-25
Tran, Thang V.
Dynamic information storage or retrieval
With servo positioning of transducer assembly over track...
Optical servo system
369 32, 369 4434, G11B 709
Patent
active
060552174
ABSTRACT:
Disclosed is a seek control method in an optical storage device, of seek-moving a light beam of an optical head from a certain track on an optical storage medium to a desired track. This seek control method comprises a step of calculating a target position, a step of detecting a present position from a track error signal indicating a relative position between the light beam and the track, a step of calculating such a feedback control quantity as to zeroize an error between the target position and the present position and a step of controlling a moving mechanism for moving the light beam in accordance with the feedback control quantity. The present position detecting step includes a first present position detecting step of detecting the present position from a signal into which the track error signal is D/A-converted when a velocity of the light beam is low and a second present position detecting step of detecting the present position from a count value obtained by counting track zero-cross signals acquired by slicing the track error signal at a zero level when the velocity of the light beam is high.
REFERENCES:
patent: 4200827 (1980-04-01), Oswald
patent: 4297734 (1981-10-01), Laishley et al.
patent: 4627038 (1986-12-01), Abed et al.
patent: 4827200 (1989-05-01), Shirou et al.
patent: 4914725 (1990-04-01), Belser et al.
patent: 4972350 (1990-11-01), Sander et al.
patent: 5005089 (1991-04-01), William et al.
patent: 5010425 (1991-04-01), Asai
patent: 5033039 (1991-07-01), Richgel
patent: 5050146 (1991-09-01), Richgels et al.
patent: 5063549 (1991-11-01), Yamamuro
patent: 5088075 (1992-02-01), Yokota
patent: 5151639 (1992-09-01), Hasegawa et al.
patent: 5228019 (1993-07-01), Yanagi et al.
patent: 5241522 (1993-08-01), Yanagi
patent: 5313147 (1994-05-01), Yoneda et al.
patent: 5457671 (1995-10-01), Takata et al.
patent: 5675558 (1997-10-01), Katoh
Fujitsu Limited
Tran Thang V.
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