Optical disk apparatus

Details Optical disk apparatus Optical disk apparatus

2007-02-23

2010-02-09

Huber, Paul (Department: 2627)

Dynamic information storage or retrieval

With servo positioning of transducer assembly over track...

Optical servo system

C369S053280

Reexamination Certificate

active

07660212

ABSTRACT:
An optical disk apparatus includes: a servo controller, operable to carry out a servo control of tracking of an optical pickup based on a tracking error signal; a TE balance regulator, operable to detect a TE balance correction value for equalizing, with a reference voltage, a central voltage of the tracking error signal when a beam spot of the optical pickup crosses a track; a detrack regulator, operable to detect a detrack correction value for causing signal quality of an output of the optical pickup to be the highest; and a TE offset corrector, operable to set an offset voltage, which is to be added to the tracking error signal, to be the TE balance correction value when a difference between the TE balance correction value and the detrack correction value is smaller than a predetermined value, and to set the offset voltage to be a value between the TE balance correction value and the detrack correction value when the difference is greater than the predetermined value.

REFERENCES:
patent: 6917571 (2005-07-01), Kusumoto et al.
patent: 2003/0117912 (2003-06-01), Yoshimi et al.
patent: 2006/0007805 (2006-01-01), Nishida et al.
patent: 2000-76668 (2000-03-01), None
patent: 2004-326910 (2004-11-01), None
patent: 2005-71545 (2005-03-01), None

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