Method for controlling ball auto-balance system of optical...

Dynamic optical information storage or retrieval – Dynamic mechanism optical subsystem – Optical storage medium support

Reexamination Certificate

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Reexamination Certificate

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07814507

ABSTRACT:
A method for controlling a ball auto-balancing system of an optical disk drive is provided. A rotational member is fixed on a rotating axis of an optical disk drive and rotates synchronously therewith. A spindle motor drives the rotational member to accelerate and decelerate within the rotating speed range at least twice. When the spindle motor accelerates and decelerates for many times, if the measured central error value is greater than the last measured one, the accelerating and decelerating range is adjusted.

REFERENCES:
patent: 6249505 (2001-06-01), Miyamoto et al.
patent: 6430144 (2002-08-01), Liao et al.
patent: 7028320 (2006-04-01), Kuo et al.
patent: 1474394 (2004-02-01), None
patent: 1505014 (2004-06-01), None
patent: 11-098759 (1999-04-01), None

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