Dynamic information storage or retrieval – Control of storage or retrieval operation by a control... – Mechanism control by the control signal
Reexamination Certificate
2006-07-26
2009-12-01
Tran, Thang V (Department: 2627)
Dynamic information storage or retrieval
Control of storage or retrieval operation by a control...
Mechanism control by the control signal
C369S094000, C369S053280, C369S044320, C369S047550
Reexamination Certificate
active
07626903
ABSTRACT:
Disclosed is an optical disc apparatus that sets a plurality of virtual zones, which correspond to a plurality of zones that are arranged in the radial direction of an optical disc, for a plurality of recording layers of the optical disc. When a servo signal distortion is detected in a virtual zone to change the rotation speed of the optical disc to a low speed in the virtual zone during an information recording or reproduction operation relative to a first recording layer, the optical disc apparatus stores the change information. When a recording or reproducing operation is to be performed in a virtual zone of a second recording layer, which is in the same disc radial position as the virtual zone of the first layer, the optical disc apparatus changes the rotation speed of the optical disc for the virtual zone to a low speed in accordance with the change information.
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Office Action issued in Japanese Patent Application No. 2005-341691 on Mar. 31, 2009.
Harai Mitsuru
Takeda Nobuhiro
Antonelli, Terry Stout & Kraus, LLP.
Bernardi Brenda
Hitachi-LG Data Storage, Inc.
Tran Thang V
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