Dynamic information storage or retrieval – Control of storage or retrieval operation by a control... – Mechanism control by the control signal
Reexamination Certificate
2007-05-08
2007-05-08
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
C369S053310
Reexamination Certificate
active
10471974
ABSTRACT:
An optical disc drive that can surely erase the trial writing data recorded in the Test Area is disclosed. The optical disc drive of the present invention has a rotation driving mechanism for rotating a loaded optical disc, and an optical pick-up capable of recording data to the optical disc by emitting a laser beam onto the optical disc drive. In the erasing procedure for erasing the trial writing data recorded in the Test Area, CW erase procedure is carried out and the optical disc drive tries to reproduce the trial writing data. Then, it is determined whether an HF signal is detected or not, and the CW erase procedure is carried out again in the case where the HF signal is detected.
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English language abstract of Japanese Publication No. 09-022529, Jan. 21, 1997.
English language abstract of Japanese Publication No. 10-134389, May 22, 1998.
Ando Junichi
Fukaya Masao
Danielsen Nathan
Marger & Johnson & McCollom, P.C.
Mitsumi Electric Co. Ltd.
Tran Thang V.
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