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    Test circuitry for a printhead nozzle arrangement
    82.
    发明授权
    Test circuitry for a printhead nozzle arrangement 有权
    打印头喷嘴装置的测试电路

    公开(公告)号：US07695091B2

    公开(公告)日：2010-04-13

    申请号：US12171294

    申请日：2008-07-11

    申请人： John Robert Sheahan ,  Mark Jackson Pulver ,  Brian Christopher Morahan ,  Alireza Moini ,  Timothy Peter Gillespie ,  Michael John Webb ,  Kia Silverbrook

    发明人： John Robert Sheahan ,  Mark Jackson Pulver ,  Brian Christopher Morahan ,  Alireza Moini ,  Timothy Peter Gillespie ,  Michael John Webb ,  Kia Silverbrook

    IPC分类号： B41J29/393

    CPC分类号： B41J2/04591 ,  B41J2/0451 ,  B41J2/04515 ,  B41J2/04541 ,  B41J2/04545 ,  B41J2/04551 ,  B41J2/04563 ,  B41J2/04573 ,  B41J2/0458 ,  B41J2/1404 ,  B41J2002/14403 ,  B41J2202/20

    摘要： Provided is test circuitry for testing a thermal actuator of a printhead nozzle arrangement of a printhead. The circuitry includes an open actuator test input, a column enable input and a row enable input. A drive transistor operatively links said thermal actuator to a power supply, and a bleed transistor is arranged in parallel with the thermal actuator. The circuitry also includes a sense transistor operatively linking an output of the drive transistor and inputs of the thermal actuator and bleed transistor to a sensing node, as well as a controller configured to deactivate the bleed and sense transistors and to activate the drive transistor when the column enable and row enable inputs are activated to link the thermal actuator to the power supply, and to activate the bleed and sense transistors when the open actuator test input is activated, so that the thermal actuator is short-circuited and the sense node is pulled high if the thermal actuator is open-circuit.

    摘要翻译： 提供了用于测试打印头的打印头喷嘴布置的热致动器的测试电路。 该电路包括一个打开的执行器测试输入，列使能输入和行使能输入。 驱动晶体管将所述热致动器可操作地连接到电源，并且放电晶体管与热致动器并联布置。 电路还包括感测晶体管，其操作地将驱动晶体管的输出和热致动器和放电晶体管的输入连接到感测节点，以及被配置为去激活放电和感测晶体管并且当激活晶体管激活时，激活驱动晶体管 列启用和行使能输入被激活以将热致动器链接到电源，并且当打开的致动器测试输入被激活时激活泄放和感测晶体管，使得热致动器短路并且感测节点被拉 如果热致动器是开路的，则为高。

    PRINTHEAD HAVING SEQUENCED NOZZLE FIRING ON INTEGRATED CIRCUIT
    84.
    发明申请
    PRINTHEAD HAVING SEQUENCED NOZZLE FIRING ON INTEGRATED CIRCUIT 失效
    在集成电路上具有顺序喷嘴的标准

    公开(公告)号：US20090213155A1

    公开(公告)日：2009-08-27

    申请号：US12437469

    申请日：2009-05-07

    申请人： Simon Robert Walmsley ,  Mark Jackson Pulver ,  John Robert Sheahan ,  Kia Silverbrook ,  Michael John Webb

    发明人： Simon Robert Walmsley ,  Mark Jackson Pulver ,  John Robert Sheahan ,  Kia Silverbrook ,  Michael John Webb

    IPC分类号： B41J29/38

    CPC分类号： B41J2/04591 ,  B41J2/04505 ,  B41J2/04541 ,  B41J2/04543 ,  B41J2/04551 ,  B41J2/04563 ,  B41J2/04573 ,  B41J2/04586 ,  B41J2/2139 ,  B41J2202/20

    摘要： A printhead is provided having an integrated circuit having at least one row comprising a plurality of sets of n adjacent nozzles, each of the nozzles being configured to expel ink in response to fire signals, and a controller for supplying the fire signals to the integrated circuit such that (a) a fire signal is provided to nozzles at a first and nth position in each set of nozzles, then (b) a fire signal is provided to the next inward pair of nozzles in each set, then in the event n is an even number, (b) is repeated until all of the nozzles in each set has been fired, or in the event n is an odd number, (b) is repeated until all of the nozzles but a central nozzle in each set have been fired, and then the central nozzle is fired.

    摘要翻译： 提供了具有集成电路的打印头，该集成电路具有至少一排包括多组n个相邻的喷嘴，每个喷嘴被配置为响应于火焰信号而排出墨水;以及控制器，用于向集成电路提供火情信号 使得（a）在每组喷嘴中的第一和第n位置处的喷嘴提供火情信号，然后（b）将火信号提供给每组中的下一对内侧喷嘴对，然后在n为 偶数（b）重复，直到每组中的所有喷嘴已经被点火，或者在n是奇数的情况下，（b）重复直到所有喷嘴，但是每组中的中心喷嘴已经被 然后中央喷嘴被点燃。