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    • 5. 发明申请
    • A CHARGE CONTROL CIRCUIT
    • 充电控制电路
    • WO2005073950A1
    • 2005-08-11
    • PCT/US2004/041860
    • 2004-12-14
    • HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.MARTIN, Eric T.VANBROCKLIN, Andrew L.
    • MARTIN, Eric T.VANBROCKLIN, Andrew L.
    • G09G3/34
    • G09G3/3466G02B26/0816G09G2300/0456G09G2300/0809G09G2300/0847G09G2310/0251G09G2310/0278G09G2310/061
    • A charge control circuit (105, 125-1) includes a switch circuit (125, 125-1, 125-2) having an input node (340) configured to receive a reference voltage (450) at a selected voltage level and configured to respond to a charge signal (440) to pre-charge the input node (340) with a pulse charge at the selected voltage level. The switch circuit (125, 125-1, 125-2) further includes a single switch configured to respond to an enable signal (430) having a duration shorter than a mechanical time constant of a micro-electro mechanical device (MEM device) (110, 110-1, 110-2, 110-3) having a variable capacitor (130, 130-1) with first and second plates (135-1, 140-1) and wherein the single switch is coupled to the MEM device (110, 110-1, 110-2, 110-3) to apply the selected voltage level across first and second plates (135-1, 140-1) of a variable capacitor (130, 130-1) of the MEM device (110, 110-1, 110-2, 110-3) for the duration to thereby cause the pulse charge to accumulate on the variable capacitor (130, 130-1).
    • 充电控制电路(105,125-1)包括具有输入节点(340)的开关电路(125,125-1,225-2),所述输入节点被配置为以选定的电压电平接收参考电压(450)并被配置为 响应充电信号(440)以在所选择的电压电平下以脉冲电荷预充电输入节点(340)。 开关电路(125,125-1,125-2)还包括单个开关,其被配置为响应具有短于微机电装置(MEM装置)的机械时间常数的持续时间的使能信号(430) 110,110-1,110-2,110-3)具有带有第一和第二板(135-1,140-1)的可变电容器(130,130-1),并且其中单个开关耦合到MEM器件 (110,110-1,110-2,110-3),以在MEM器件的可变电容器(130,130-1)的第一和第二板(135-1,140-1)上施加所选择的电压电平 (110,110-1,110-2,110-3),从而使脉冲电荷累积在可变电容器(130,130-1)上。
    • 8. 发明申请
    • PRINTHEAD APPARATUS, PRINTER SYSTEM AND METHOD OF PRINTHEAD BUILT-IN TEST
    • PRINTHEAD设备,打印机系统和打印机内置测试方法
    • WO2012102709A1
    • 2012-08-02
    • PCT/US2011/022469
    • 2011-01-25
    • HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.MARTIN, Eric T.GHOZEIL, Adam L.
    • MARTIN, Eric T.GHOZEIL, Adam L.
    • B41J2/175B41J2/17
    • B41J29/393G06K15/1894
    • A printhead apparatus (100), an inkjet printer system (200), and a method (300) of built-in test employ a test flag transmitted through a data channel of a printhead. The apparatus (100) includes a plurality of printheads (110), a data register (120) at each printhead (110), and a status channel (130). Each printhead has a unidirectional data channel (UDC) (112) to provide data to the printhead. The data register detects proper reception of a test flag received by the printhead through the UDC. The status channel reports printhead status information including whether or not proper reception of the test flag was detected by the data register. The system (200) includes the apparatus (100) and a controller (250) to generate the test flag and receive the printhead status information. The method (300) includes sending (310) a test flag, and verifying (320) proper reception thereof.
    • 打印头装置(100),喷墨打印机系统(200)和内置测试方法(300)采用通过打印头的数据通道传输的测试标志。 设备(100)包括多个打印头(110),每个打印头(110)处的数据寄存器(120)和状态通道(130)。 每个打印头具有单向数据通道(UDC)(112)以向打印头提供数据。 数据寄存器通过UDC检测打印头接收到的测试标志的正确接收。 状态通道报告打印头状态信息,包括数据寄存器是否检测到测试标志的正确接收。 系统(200)包括用于产生测试标志并接收打印头状态信息的设备(100)和控制器(250)。 方法(300)包括发送(310)测试标志,并验证(320)适当的接收。