Dynamic information storage or retrieval – Control of storage or retrieval operation by a control... – Mechanism control by the control signal
Reexamination Certificate
2007-11-27
2007-11-27
Wellington, Andrea (Department: 2627)
Dynamic information storage or retrieval
Control of storage or retrieval operation by a control...
Mechanism control by the control signal
C369S053260, C369S116000
Reexamination Certificate
active
10507733
ABSTRACT:
There provided an optical disk recording/reproducing method and an apparatus thereof capable of constantly forming an optimum mark region while appropriately correcting recording conditions. A sample hold circuit6detects and holds the level of a TPP signal to output a state monitoring signal. A reference level setting portion8holds the level of the state monitoring signal at which an optimum recording state is obtained and outputs a reference level signal. A recording state determining portion7outputs a record shortage signal and a record surplus signal based on the result of comparison between the reference level signal and the state monitoring signal. An LD output correcting portion9outputs an LD output correcting signal based on the record shortage signal and the record surplus signal as well as a record data signal. An LD output setting portion10outputs an LD output reference signal corresponding to an LD output set value at which to obtain an optimum light intensity of the laser beam for recording. An LD output controlling portion11outputs an LD output controlling signal corresponding to the result of add calculation of the LD output reference signal and the LD output correcting signal to an LD driving portion12.
REFERENCES:
patent: 4648085 (1987-03-01), Shimonou
patent: 6359847 (2002-03-01), Shimizu
patent: 6842413 (2005-01-01), Miyaki
patent: 6961294 (2005-11-01), Matsui
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patent: 2001-184659 (2001-07-01), None
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Translation of Sunakawa et al (JP 05-144000).
Translation of Suzuki et al (JP 07-057268).
Battaglia Michael V
Wellington Andrea
Young & Thompson
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