OPTICAL DISK DRIVE AND FOCUS OFFSET CONTROL METHOD
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United States of America Patent
Stats
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N/A
Issued Date -
Jan 10, 2008
app pub date -
Jan 30, 2007
filing date -
Jan 31, 2006
priority date (Note) -
Abandoned
status (Latency Note)
Importance
Abstract
An optical disk drive includes an optical pickup which emits a light beam onto an optical disk, and receiving a reflection light to output a signal in accordance with the reflection light, a PRML processing unit which carries out signal processing with respect to the signal output from the optical pickup using a partial response and maximum likelihood (PRML) technique, a focus offset setting unit which sets a focus offset value used for focusing the optical pickup based on a difference value between a signal processed by the PRML processing unit and the signal output from the optical pickup, and a focus control unit which controls a focus of the optical pickup in accordance with focus offset set by the focus offset setting unit.
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Patent Citation Ranking
- 2 Citation Count
- G11B Class
- 5 % this patent is cited more than
- 17 Age