Optical recording medium, recording/reproducing apparatus...

Dynamic information storage or retrieval – Control of storage or retrieval operation by a control... – Mechanism control by the control signal

Reexamination Certificate

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Reexamination Certificate

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07830763

ABSTRACT:
An optical disc apparatus is provided with optimum power control (OPC) to determine an optimum laser power needed for recording data on an optical disc. Such an apparatus comprises a controller to determine optimum writing power in such a way of re-establishing a new test zone when an erasing error is detected on an initially established test zone in order to perform the OPC. When the erasing error is detected on a test zone of an OPC zone, a new test zone is re-established, so that OPC is performed rapidly while reducing an error frequency occurring when optimum writing power is not determined.

REFERENCES:
patent: 2002/0085462 (2002-07-01), Spruit
patent: 2003/0133378 (2003-07-01), Kawashima et al.
patent: 2003/0185118 (2003-10-01), Takeda
patent: 2004/0125720 (2004-07-01), Ando et al.
patent: 2005/0030861 (2005-02-01), Matsui et al.
patent: 2005/0128911 (2005-06-01), Miyashita et al.
patent: 11-39803 (1999-02-01), None

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