Tracking control system and method for tracking control

Details Tracking control system and method for tracking control Tracking control system and method for tracking control

2007-01-02

2007-01-02

Korzuch, William (Department: 2627)

Dynamic information storage or retrieval

With servo positioning of transducer assembly over track...

Optical servo system

C369S053280

Reexamination Certificate

active

10654607

ABSTRACT:
A tracking control system for outputting a tracking control signal for an optical pickup including a plurality of light detecting sections each of which converts reflected light of a light beam applied to an optical disk into an electric signal, and outputs the signal, includes: a balance correction amount calculating section for obtaining, as a balance correction amount, a value by which a differential phase tracking error signal based on each output of the light detecting sections should be shifted in accordance with a direct-current component of a differential amplitude tracking error signal based on each output of the light detecting sections such that a direct-current component of the differential phase tracking error signal approaches a given reference potential; a balance changing section for shifting the differential phase tracking error signal in accordance with the balance correction amount; and a tracking control section for generating the tracking control signal in accordance with the differential phase tracking error signal after the shift.

REFERENCES:
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patent: 6567355 (2003-05-01), Izumi et al.
patent: 6920093 (2005-07-01), Nishigaki
patent: 11-175989 (1999-07-01), None

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