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6 条记录 (耗时 0.011 秒)

    Method and structure for controlling the energizing of an ink jet printhead in a value dispensing device such as a postage meter
    2.
    发明授权
    Method and structure for controlling the energizing of an ink jet printhead in a value dispensing device such as a postage meter 失效
    用于控制诸如邮资计费器之类的价值分配装置中的喷墨打印头的激励的方法和结构

    公开(公告)号：US5815172A

    公开(公告)日：1998-09-29

    申请号：US707984

    申请日：1996-08-23

    申请人： Sungwon R. Moh

    发明人： Sungwon R. Moh

    IPC分类号： B41J2/045 ,  B41J2/05 ,  B41J29/38

    CPC分类号： B41J2/0452 ,  B41J2/04541 ,  B41J2/04553 ,  B41J2/04573 ,  B41J2/04581 ,  B41J2/04591

    摘要： A method for controlling energizing of an ink jet printhead includes the steps of generating encoder pulses to a motor to activate the motor to move the printhead at a desired speed over a recording medium; generating and sending fire pulses at a fire pulse frequency from an ASIC to an ink jet printhead driver chip to selectively energize ink jet printhead nozzles to eject drops of ink onto the recording medium based on a predetermine relationship between an expected encoder pulse frequency and the fire pulse frequency; compensating for variations in the speed of the ink jet printhead movement caused by variations in the encoder pulse frequency by using the ASIC for continuously comparing the encoder pulse frequency to the fire pulse frequency and for adjusting the fire pulse frequency based upon the variations to the encoder pulse frequency to maintain the predetermined relationship thereby synchronizing the ink jet printhead movement with the energizing of the printhead nozzles.

    摘要翻译： 一种用于控制喷墨打印头通电的方法包括以下步骤：向马达产生编码器脉冲，以启动马达，使打印头以期望的速度移动到记录介质上; 产生并以火焰脉冲频率从ASIC发送到喷墨打印头驱动器芯片，以根据期望的编码器脉冲频率和火焰之间的预定关系来选择性地激励喷墨打印头喷嘴以将墨滴喷射到记录介质上 脉冲频率; 通过使用ASIC来连续地比较编码器脉冲频率和发射脉冲频率以及根据编码器脉冲频率的变化来调整发射脉冲频率来补偿由编码器脉冲频率变化引起的喷墨打印头移动速度的变化 脉冲频率以保持预定的关系，从而使喷墨打印头移动与打印头喷嘴的激励同步。

    Load current limiting circuit for PWM controlled brushless motor
    3.
    发明授权
    Load current limiting circuit for PWM controlled brushless motor 失效
    PWM控制无刷电机负载限流电路

    公开(公告)号：US5502361A

    公开(公告)日：1996-03-26

    申请号：US298863

    申请日：1994-08-31

    申请人： Sungwon R. Moh ,  Scott T. Potter ,  Frank D. Ramirez ,  Edilberto I. Salazar

    发明人： Sungwon R. Moh ,  Scott T. Potter ,  Frank D. Ramirez ,  Edilberto I. Salazar

    IPC分类号： H02P6/00 ,  H02P6/14 ,  H02P5/06

    CPC分类号： H02P6/14 ,  H02P6/28

    摘要： A circuit for controlling a current in a load, the circuit includes: structure for connecting the circuit to a source of power, the power source connecting structure including a power switch having off and on operating modes; structure for connecting the circuit to a supply of a pulse width modulated (PWM) control signal, the PWM supply connecting structure including an AND gate having first and second input structure and an output structure, one of the first and second input structures connected for receiving the PWM control signal, and the AND gate output structure connected to the power switch for operating the switch; structure for monitoring the current in the load, the monitoring structure including a differential amplifier, the differential amplifier having an instantaneous output voltage signal proportional to the load current when the power switch is in the on operating mode, structure for comparing a value derived from the instantaneous signal to a high reference voltage signal and a low reference voltage signal and providing a first comparison signal, structure for providing a peak reference voltage signal in response to the first comparison signal, structure for comparing the peak reference voltage signal and instantaneous output voltage signal and providing a second comparison signal; and structure for providing a signal corresponding to the second comparison signal to the other of the first and second input structures of the AND gate for operating the power switch in consideration of the comparison between the peak reference voltage signal and instantaneous output voltage signal.

    摘要翻译： 一种用于控制负载中的电流的电路，所述电路包括：用于将电路连接到电源的结构，所述电源连接结构包括具有断开和接通工作模式的电源开关; 用于将电路连接到脉宽调制（PWM）控制信号的电源的结构，所述PWM电源连接结构包括具有第一和第二输入结构的与门和输出结构，所述第一和第二输入结构之一被连接用于接收 PWM控制信号和与门电路输出结构相连的电源开关用于操作开关; 用于监视负载中的电流的结构，所述监视结构包括差分放大器，所述差分放大器具有当所述功率开关处于导通操作模式时与所述负载电流成比例的瞬时输出电压信号;用于比较从 瞬时信号到高参考电压信号和低参考电压信号，并提供第一比较信号，用于响应于第一比较信号提供峰值参考电压信号的结构，用于比较峰值参考电压信号和瞬时输出电压信号的结构 并提供第二比较信号; 以及结构，用于根据峰值参考电压信号和瞬时输出电压信号之间的比较，将对应于第二比较信号的信号提供给与门的第一和第二输入结构中的另一个，以操作电源开关。

    Multi function sensing device for printing apparatus
    5.
    发明授权
    Multi function sensing device for printing apparatus 失效
    用于打印设备的多功能感应装置

    公开(公告)号：US5842800A

    公开(公告)日：1998-12-01

    申请号：US775787

    申请日：1996-12-31

    申请人： William F. Bailey ,  David W. Hubbard ,  Sungwon R. Moh ,  James R. Ralph ,  Edward J. Twarog

    发明人： William F. Bailey ,  David W. Hubbard ,  Sungwon R. Moh ,  James R. Ralph ,  Edward J. Twarog

    IPC分类号： B41J2/175 ,  B41J29/393 ,  B41J29/42

    CPC分类号： B41J29/393 ,  B41J2/17566

    摘要： A printing apparatus is disclosed which has various operating components, and which includes a single sensing means for sensing certain operational characteristics of the operating components to monitor the operational status thereof for the purpose of either providing an operator perceptible indication that a certain operational characteristic of one of the operating components is not in a condition for normal operation of the printing apparatus. The single sensing means includes a photo detecting means mounted on the inside surface of the cover of a housing for the operating characteristics of the printing apparatus, and an actuating means mounted on an ink cartridge which is mounted on and movable with a moving print head, such that the sensing means can provided an ink dication of whether the cover is open or closed, whether the ink cartridge is present or absent, whether the print head is in a proper position for commencing a normal cycle of operation, and in one variation of an alternate embodiment of the invention, whether there is sufficient ink in the ink cartridge for normal operation of the printing apparatus, and in another variation thereof, how much ink is in the ink cartridge at all times between full and insufficient for normal operation of the printing apparatus.

    摘要翻译： 公开了一种打印装置，其具有各种操作部件，并且其包括单个感测装置，用于感测操作部件的某些操作特性以监视其操作状态，以提供操作者可感知的指示，即一个操作特性 的操作部件不处于打印装置的正常操作的状态。 单个感测装置包括安装在壳体的盖的内表面上用于打印设备的操作特性的光检测装置，以及安装在可移动打印头上并可移动的墨盒上的致动装置， 使得感测装置可以提供盖子是打开还是关闭，墨盒是否存在，打印头是否处于适当位置以开始正常的操作循环的墨水分开，以及在一个变化中 本发明的替代实施例中，墨盒中是否有足够的墨水用于打印设备的正常操作，并且在其另一种变型中，墨盒中的所有墨水在充分和不足以正常操作之间存在多少墨水 打印设备

    Integrated circuit driver having current limiter for brushless motor
    6.
    发明授权
    Integrated circuit driver having current limiter for brushless motor 失效
    集成电路驱动器，具有无刷电机限流器

    公开(公告)号：US5382890A

    公开(公告)日：1995-01-17

    申请号：US18597

    申请日：1993-02-17

    申请人： Sungwon R. Moh ,  Scott T. Potter ,  Frank D. Ramirez ,  Edilberto I. Salazar

    发明人： Sungwon R. Moh ,  Scott T. Potter ,  Frank D. Ramirez ,  Edilberto I. Salazar

    IPC分类号： H02P6/00 ,  H02P6/14

    CPC分类号： H02P6/14 ,  H02P6/28

    摘要： An integrated circuit driver for a brushless motor having an encoder which includes a plurality of Hall-effect sensors operative for providing commutation information to a motor controller includes a commutation decoding section for decoding the commutation information from the Hall-effect sensors and an analog current limiter. The current limiter includes a circuit for dynamically switching the current limit values for current in the motor between a high current limit value and a low current limit value based on the average or RMS value of the motor winding current. The current limit values must be provided externally. A Hall-effect sensor quadrature encoder is provided on the integrated circuit and a selection switch allows for the selection of a quadrature output from an external optical encoder or the internal Hall-effect sensor encoder.

    摘要翻译： 一种用于无刷电动机的集成电路驱动器，其具有编码器，该编码器包括用于向电动机控制器提供换向信息的多个霍尔效应传感器，包括用于从霍尔效应传感器和模拟限流器解码换向信息的换向解码部分 。 电流限制器包括用于基于电动机绕组电流的平均值或RMS值动态地切换电动机中的电流的电流极限值的电路，该电流限制值在高限流值和低电流限制值之间。 目前的极限值必须在外部提供。 在集成电路上提供霍尔效应传感器正交编码器，选择开关允许从外部光学编码器或内部霍尔效应传感器编码器选择正交输出。