发明名称 |
Laser driving apparatus, driving method thereof, and image-forming apparatus using it |
摘要 |
A laser driving apparatus which includes a plurality of laser emitting elements, a light receiving element for monitoring amounts of light from the plurality of laser emitting elements, and a current-voltage converter for converting a light amount monitor current outputted from the light receiving element to a light amount monitor voltage. The laser driving apparatus also includes a control circuit for controlling a drive current of each of the plurality of laser emitting elements, based on the light amount monitor voltage outputted from the current-voltage converter. The current-voltage converter includes a common resistor and a plurality of non-common resistors, wherein the common resistor is connected to said light receiving element, and each of the plurality of non-common resistors is connectable to the common resistor through a respective switch and is connected to the control circuit.
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申请公布号 |
US6560256(B1) |
申请公布日期 |
2003.05.06 |
申请号 |
US19990447285 |
申请日期 |
1999.11.23 |
申请人 |
CANON KABUSHIKI KAISHA |
发明人 |
SEKI YUICHI;NAKAHARA TAKASHI |
分类号 |
B41J2/44;B41J2/45;B41J2/455;G02B26/10;H01S5/042;H01S5/0683;H01S5/40;H04N1/113;H04N1/23;(IPC1-7):H01S3/00 |
主分类号 |
B41J2/44 |
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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