Power control method for eliminating output power offset of a pick-up head in an optical disc drive
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United States of America Patent
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May 18, 2010
Grant Date -
Jul 6, 2006
app pub date -
Jul 6, 2005
filing date -
Dec 31, 2004
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A power controlling method for eliminating output power offset of a pick-up head in an optical disc drive. The power control method includes measuring a first predetermined power related to a first predetermined control signal in a predetermined procedure, inputting a test data containing a plurality of first bits and a plurality of second bits, activating a sample/hold circuit to form a close loop so that the first predetermined control signal can be received and utilized for driving a pick-up head to output a first power when the plurality of first bits are received, and calculating an offset power based on the first predetermined power and the first power for rectifying output power of the pick-up head.
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