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US 2008/0259756 A1Published application
Optical disk apparatus
AssigneeSanyo Electric Co., Ltd.
InventorMorio NAKATANI
Life of this patent
Estimating the term…
Abstract
A laser power which is lower than an optimum reproduction laser power is set as an initial value. The reproduction laser power is increased from the initial value while trial reproduction is performed until a quality level of a reproduction signal is not lower than a reference level. At the time the quality level of the reproduction signal is not lower than the reference level, the reproduction laser power is set as the reproduction laser power with respect to an optical disk which is of a reproduction target.
Claims6
An optical disk apparatus comprising:
- an optical pickup which irradiates an optical disk with a laser beam;
- an optimum reproduction laser power obtaining unit which obtains an optimum reproduction laser power from the optical disk;
- an initial laser power setting unit which sets a laser power lower than the optimum reproduction laser power as an initial value;
- a laser power adjusting unit which increases the reproduction laser power from the initial value while performing trial reproduction until a quality level of the reproduction signal is not lower than a reference level;
- and
- a reproduction laser power setting unit which set the reproduction laser power at a time the quality level is not lower than the reference level as the reproduction laser power to reproduce the optical disk.
3 more elements
Dependencies are inferred from the claim text.