公开(公告)号：US5361123A

公开(公告)日：1994-11-01

申请号：US110749

申请日：1993-08-23

申请人： Thomas I. Yeh ,  Clifford K. Friend ,  Timothy A. Cole ,  Leo R. Farnand

发明人： Thomas I. Yeh ,  Clifford K. Friend ,  Timothy A. Cole ,  Leo R. Farnand

IPC分类号： G03G15/02 ,  G03G15/28

CPC分类号： G03G15/0266 ,  G03G15/0291

摘要： A charging device for producing a voltage potential on a photoconductive member including a corona generator for charging a portion of the image receptor to a substantially uniform potential; a corona generating potential source electrically connected to the corona generator; a sensor for determining the potential on the image receptor; and a microprocessor including an analog to digital converter interconnected to the corona generating potential source; the sensor; and the controller for regulation of the potential on the image receptor.

摘要翻译： 一种用于在包括用于将图像接收器的一部分充电至基本均匀的电位的电晕发生器的感光体上产生电压电位的充电装置; 与电晕发生器电连接的电晕发生电位源; 用于确定图像受体上的电位的传感器; 以及包括与电晕发生电位源互连的模 - 数转换器的微处理器; 传感器; 以及用于调节图像受体电位的控制器。

公开(公告)号：US5500721A

公开(公告)日：1996-03-19

申请号：US367608

申请日：1995-01-03

申请人： John M. Randall ,  Clifford K. Friend

发明人： John M. Randall ,  Clifford K. Friend

IPC分类号： G03G15/00 ,  G03G15/08 ,  H02M7/48 ,  H02M3/00

CPC分类号： G03G15/80 ,  G03G15/08 ,  H02M7/48

摘要： A power supply circuit which converts an A.C. signal into an output signal that combines A.C. and D.C. voltages components. The circuit uses a voltage doubler topology with transistors. The transistors are controlled by waveform generators, which generate a series of pulses. By adjusting the duty cycle of the pulses, the appropriate D.C. voltages components can be formed. By adjusting the duty cycle of the positive output producing pulses and negative output producing pulses relative to each other, the required A.C. signal can be adjusted. A scavengeless developer in a xerographic machine requires three bias voltage inputs. The power supply circuit can be attached to a transformer connected to an appropriate A.C. power source to produce the required voltage signals to control the operation of the developer.

摘要翻译： 一种电源电路，其将交流信号转换成结合了直流和直流电压分量的输出信号。 该电路使用具有晶体管的倍压器拓扑结构。 晶体管由波形发生器控制，产生一系列脉冲。 通过调整脉冲的占空比，可以形成适当的直流电压分量。 通过调节相对于彼此的正输出产生脉冲和负输出产生脉冲的占空比，可以调节所需的交流信号。 在静电复印机中的无痕显影剂需要三个偏置电压输入。 电源电路可以连接到连接到适当的交流电源的变压器，以产生所需的电压信号以控制显影剂的操作。

公开(公告)号：US5204730A

公开(公告)日：1993-04-20

申请号：US891097

申请日：1992-06-01

申请人： David W. Richmond ,  Clifford K. Friend ,  Robert J. Mead

发明人： David W. Richmond ,  Clifford K. Friend ,  Robert J. Mead

IPC分类号： G03G15/00 ,  G03G15/01 ,  G03G15/14 ,  G03G15/16

CPC分类号： G03G15/6535 ,  G03G15/0131

摘要： Method and apparatus for providing multiple colors in a single pass of a copy sheet through a transfer station by switching the polarity of a transfer corotron and automatically adjusting the output of the detac corona device. In particular, a single power supply including high voltage switches responds to color selections to change the polarity of a transfer corotron to charge a copy sheet for toner transfer, and a current sense and precision rectifier stage responds to the copy sheet charge to provide a suitable detac charge independent of the transfer corotron polarity.

摘要翻译： 用于通过转印转运电极的极性切换并自动调整detac电晕装置的输出，通过转印站在复印纸的单次通过中提供多种颜色的方法和装置。 特别地，包括高电压开关的单个电源响应于颜色选择以改变转印旋转电极的极性以对用于调色剂转印的复印纸进行充电，并且电流感测和精密整流器级对复印纸电荷进行响应以提供合适的 detac电荷独立于转移电晕极性。

公开(公告)号：US6157804A

公开(公告)日：2000-12-05

申请号：US532575

申请日：2000-03-22

申请人： David W. Richmond ,  Robert J. Mead ,  Clifford K. Friend

发明人： David W. Richmond ,  Robert J. Mead ,  Clifford K. Friend

IPC分类号： G03G15/16 ,  G03G15/14 ,  G03G21/00

CPC分类号： G03G15/16

摘要： A piezoelectric acoustic transducer, especially for a printer photoreceptor toner transfer assist system, having a mechanical resonance varying over a substantial frequency range, is driven by a driver circuit having an automatically variable frequency electrical power output. The driver circuit initially automatically slowly sweeps over a wide frequency range encompassing the resonance range of the transducer until the resonant frequency is detected from the electrical impedance change of the transducer at resonance. The driver circuit then automatically switches to a frequency control with a phase lock loop system responsive to the phase of the transducer voltage and current, to hold and maintain the driver circuit output at the varying resonant frequency of the transducer. A small frequency range rapid dithering of the driver circuit frequency may be additionally provided above and below the resonant frequency of the transducer.

摘要翻译： 特别是用于具有在相当频率范围内变化的机械共振的打印机感光体调色剂传送辅助系统的压电声换能器由具有自动变频电力输出的驱动电路驱动。 驱动器电路最初自动缓慢地扫过覆盖换能器谐振范围的宽频率范围，直到谐振频率从谐振时的换能器的电阻抗变化检测到。 然后，驱动器电路自动切换到响应于传感器电压和电流的相位的锁相环系统的频率控制，以保持和保持驱动器电路输出在换能器的变化的谐振频率。 驱动器电路频率的小频率快速抖动可以额外地设置在换能器的谐振频率之上和之下。

公开(公告)号：US4286316A

公开(公告)日：1981-08-25

申请号：US122168

申请日：1980-02-19

申请人： Clifford K. Friend

发明人： Clifford K. Friend

IPC分类号： H03B28/00 ,  H02M7/5383 ,  H02M7/537

CPC分类号： H02M7/53832 ,  Y02B70/1441

摘要： A resonant circuit sine wave power supply in which the resonant circuit thereof is coupled to ground through alternately conducting complimentary emitter followers during the portions of the voltage generation cycle when the resonant circuit is not coupled to a dc supply, whereby a power supply that is substantially non-dissipative of heat is provided.

摘要翻译： 一种谐振电路正弦波电源，其中当所述谐振电路未耦合到直流电源时，在所述电压产生循环的所述部分期间，其谐振电路通过交替导电的互补发射极跟随器耦合到地，由此基本上 提供非耗散热量。