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1. 发明授权

US6144680A Laser driving apparatus and image forming apparatus using the same 失效
标题翻译：激光驱动装置及使用其的图像形成装置
公开(公告)号：US6144680A
公开(公告)日：2000-11-07
申请号：US114512
申请日：1998-07-14
申请人： Hajime Kaji , Tomobumi Nakayama, deceased , Michiharu Masuda , Takayuki Kawakami
发明人： Hajime Kaji , Tomobumi Nakayama, deceased , Michiharu Masuda , Takayuki Kawakami
IPC分类号： H01S5/06 , H01S5/042 , H01S5/0683 , H01S5/40 , H04N1/40 , H01S3/00
CPC分类号： H04N1/4005 , H01S5/4025 , H04N1/40037 , H01S5/042 , H01S5/0683
摘要： A laser driving apparatus for driving a plurality of laser beam sources includes a plurality of laser beam sources, a photodetector for detecting amounts of laser beams emitted from the plurality of laser beam sources, a plurality of current sources for driving the plurality of laser beam sources, a plurality of switches respectively interposed between the plurality of laser beam sources and the plurality of current sources, a plurality of controllers for controlling light amounts of the plurality of laser beam sources by comparing the light amounts detected by the photodetector with a reference value and controlling current amounts of the plurality of current sources in accordance with the comparison values, a plurality of sample/hold circuits respectively interposed between the photodetector and the plurality of controllers, and timing adjustment device for outputting a plurality of timing signals of a first type for controlling the plurality of switches and a plurality of timing signals of a second type for controlling the plurality of sample/hold circuits. The timing adjustment device outputs the plurality of timing signals of the first type for time-divisionally turning on the plurality of switches and sequentially making the plurality of laser beam sources to emit laser beams one by one. The plurality of timing signals of the second type making each of the plurality of sample/hold circuits corresponding to the plurality of switches sample while each of the plurality of switches is on. The plurality of timing signals of the second type making each of the plurality of sample/hold circuits sample while any one of the switches which are turned on before a corresponding switch is on.
摘要翻译：用于驱动多个激光束源的激光驱动装置包括：多个激光束源，用于检测从所述多个激光束源，用于驱动所述多个激光束源的多个电流源发射的激光束的量的光电检测器中，多个分别插入在多个激光束源和所述多个电流源，用于通过比较由所述光检测器与参考值检测的光量控制所述多个激光光源的光量的多个控制器之间的开关控制电流量的多个电流源的根据比较值，多个分别插入在光电探测器和所述多个控制器，以及定时调整装置之间，用于输出多个用于定时的第一类型的信号的采样/保持电路的控制多个开关和多个定时信号用于控制多个采样/保持电路的第二类型的Nals。定时调整装置输出第一类型的多个定时信号，用于分时地接通多个开关，并依次使多个激光束源逐个发射激光束。在多个开关中的每一个接通时，使与多个开关相对应的多个采样/保持电路中的每一个采样的第二类型的多个定时信号被采样。多个采样/保持电路中的每一个采样的第二类型的多个定时信号在相应的开关导通之前被接通的任何一个开关中采样。

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