Laser power control system and method used in optical disc writer
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United States of America Patent
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Jul 10, 2012
Grant Date -
Aug 14, 2008
app pub date -
Dec 3, 2007
filing date -
Feb 14, 2007
priority date (Note) -
Expired
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Abstract
A laser power control system and method used in an optical disc writer. According to a write power value, the laser power control system drives a laser to output a write power through a first channel. According to a proportional value, the laser power control system drives the laser to output an overdrive power through a second channel. By using a close loop control of the laser power control system, the write power and the overwrite power are independent of the temperature changes.
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