发明名称 |
LASER-POWER CONTROL METHOD, AND LASER DRIVING DEVICE AND OPTICAL DISC APPARATUS USING THE METHOD |
摘要 |
In a laser-power control method, a power of laser light emitted from a laser-light emitting element and a driving current for driving the laser-light emitting element are detected. An approximate expression indicating a driving-current to light-power characteristic of the laser-light emitting element is updated on the basis of the detected light power and the detected driving current while sequentially increasing accuracy. A command driving current corresponding to a target light power is calculated by using the updated approximate expression. The laser-light emitting element is driven on the basis of the calculated command driving current so as to output the target light power.
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申请公布号 |
US2008101428(A1) |
申请公布日期 |
2008.05.01 |
申请号 |
US20070929717 |
申请日期 |
2007.10.30 |
申请人 |
KABUSHIKI KAISHA TOSHIBA |
发明人 |
OHGUSHI TOSHIAKI;KURODA KAZUTO;USUI TAKASHI |
分类号 |
H01S5/00;G11B7/125 |
主分类号 |
H01S5/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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