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71. 发明授权

US5995130A Laser beam scanning apparatus and method providing controllable print density 失效
标题翻译：激光束扫描装置和提供可控打印密度的方法
公开(公告)号：US5995130A
公开(公告)日：1999-11-30
申请号：US685560
申请日：1996-07-24
申请人： Kazuhiro Akatsu , Susumu Saito , Keiji Kataoka , Shuho Yokokawa , Koji Doi , Masahiro Mizuno
发明人： Kazuhiro Akatsu , Susumu Saito , Keiji Kataoka , Shuho Yokokawa , Koji Doi , Masahiro Mizuno
IPC分类号： B41J2/44 , G02B26/10 , G02B26/12 , G03G15/04 , H04N1/04 , H04N1/113 , H04N1/191 , B41J2/47
CPC分类号： G02B26/123 , H04N1/0402 , H04N1/1135 , H04N1/1911
摘要： A laser beam scanning apparatus and method for providing controllable print density. The laser beam scanning apparatus includes a modulator for modulating a light beam, a rotating polygon mirror for deflectively scanning a light beam which is passed through the modulator, at least one lens unit having at least one lens which is movable to a position on the optical axis and a position completely off the optical axis, and a controller for switching the modulating clock frequency of the modulator and the rotating speed of the polygon mirror together with selective shifting of the at least one lens unit or lens thereof to a position on the optical axis or completely off the optical axis whereby the method effects control of the apparatus for controlling print density.
摘要翻译：一种用于提供可控打印浓度的激光束扫描装置和方法。激光束扫描装置包括用于调制光束的调制器，用于偏转地扫描通过调制器的光束的旋转多面镜，至少一个透镜单元，其具有至少一个可移动到光学器件上的位置的透镜轴和完全离开光轴的位置，以及用于切换调制器的调制时钟频率和多面镜的旋转速度的控制器，以及至少一个透镜单元或其透镜的选择性移位至光学上的位置轴或完全离开光轴，由此该方法实现了用于控制打印浓度的装置的控制。

72. 发明授权

US5532913A Electric power source 失效
标题翻译：电源
公开(公告)号：US5532913A
公开(公告)日：1996-07-02
申请号：US215399
申请日：1994-03-21
申请人： Koji Suzuki , Toshiyuki Sekiya , Koji Doi
发明人： Koji Suzuki , Toshiyuki Sekiya , Koji Doi
IPC分类号： H02M7/48 , H02M3/335
CPC分类号： H02M7/48
摘要： An AC high-voltage power supply circuit, adapted for use in an image forming apparatus, for example in the separation charger of an electrophotographic copier, and capable of controlling the DC component of an AC high voltage, over a wide range including positive and negative regions. The power supply circuit includes, at the low voltage side of a secondary coil of an AC high-voltage transformer, a DC constant current circuit consisting of a transistor and a diode, a constant voltage circuit opposite in polarity to the DC constant circuit, and a detection circuit for detecting the DC component of a load current. The outputs of the constant voltage circuit and of the DC constant current circuit are controlled according to the output of the detection circuit. Such a device has a simple structure, provides a wider control range of the DC component including positive and negative regions, and has a lower power loss than previous power supply circuits.
摘要翻译：一种适用于图像形成装置的AC高压电源电路，例如在电子照相复印机的分离充电器中，能够在包括正和负的宽范围内控制交流高压的直流分量地区。电源电路在交流高压变压器的次级线圈的低压侧包括由晶体管和二极管构成的直流恒流电路，与直流恒定电路极性相反的恒压电路，以及用于检测负载电流的直流分量的检测电路。根据检测电路的输出来控制恒压电路和直流恒流电路的输出。这种器件具有简单的结构，提供包括正区和负区的DC分量的更宽的控制范围，并且具有比以前的电源电路低的功率损耗。

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