Optical pickup tilt correction control unit and tilt correcting method
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United States of America Patent
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N/A
Issued Date -
Jul 20, 2006
app pub date -
Dec 23, 2005
filing date -
Dec 27, 2004
priority date (Note) -
Abandoned
status (Latency Note)
Importance
Abstract
An optical disc recording/reproducing apparatus according to the present invention can adjust a tilt of an object lens within a short time, by laying an average offset component on a correction amount applied to a tilt correction coil, adding a step disturbance of optional polarity to a center value of the laid offset components, detecting an envelope or maximum value and a minimum value of a reproduced output, averaging the difference between the detected envelope or maximum value and the minimum value, and controlling the offset amount of an offset component to decrease the difference between the envelope or maximum value and the minimum value when a step disturbance is changed to a fixed value.
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