Disk device, and position determination method for pickup head

Details Disk device, and position determination method for pickup head Disk device, and position determination method for pickup head

2007-07-25

2009-12-01

Neyzari, Ali (Department: 2627)

Dynamic information storage or retrieval

With servo positioning of transducer assembly over track...

Optical servo system

C369S044270

Reexamination Certificate

active

07626898

ABSTRACT:
This disk device includes a pickup head (PUH), a PUH shift control unit, and an inner circumference position detection unit. The PUH reads out data upon a disk. The inner circumference position detection unit detects whether or not the PUH has shifted to the inner circumferential edge of the disk. And, after having stopped the PUH in the neighborhood of a position at which the detection state of the inner circumference position detection unit changes over, the PUH shift control unit determines a shift time period T5for the PUH when a predetermined operation has been performed. And, by supplying power during the time period T7, the PUH is stopped at a predetermined position.

REFERENCES:
patent: 7362348 (2008-04-01), Morishima
patent: 05217182 (1993-08-01), None
patent: 2005332525 (2005-12-01), None

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