发明名称 |
METHOD FOR DERIVING PRECISE CONTROL OVER LASER POWER OF AN OPTICAL PICKUP UNIT, AND ASSOCIATED AUTOMATIC POWER CALIBRATION CIRCUIT |
摘要 |
A method for deriving precise control over laser power of an optical pickup unit (OPU) includes: providing an analog-to-digital converter (ADC) within an automatic power calibration (APC) circuit to derive a path gain and/or a path offset from the APC circuit; and selectively performing compensation according to the gain and/or the path offset, in order to maintain precision of a relationship between the laser power and a target command utilized for controlling the laser power. An associated APC circuit comprising an ADC and at least one compensation module is further provided. The ADC is utilized for deriving a path gain and/or a path offset from the APC circuit. The compensation module is utilized for selectively performing compensation according to the path gain and/or the path offset, in order to control the laser power by a target command.
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申请公布号 |
US2009141759(A1) |
申请公布日期 |
2009.06.04 |
申请号 |
US20080195414 |
申请日期 |
2008.08.21 |
申请人 |
CHI HSIAO-YUAN;CHEN CHIH-CHING;LIAO CHIA-WEI |
发明人 |
CHI HSIAO-YUAN;CHEN CHIH-CHING;LIAO CHIA-WEI |
分类号 |
H01S3/00 |
主分类号 |
H01S3/00 |
代理机构 |
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地址 |
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