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    THERMAL FLUID-EJECTION DEVICE DIE
    12.
    发明申请
    THERMAL FLUID-EJECTION DEVICE DIE 审中-公开
    热流体喷射装置

    公开(公告)号：WO2010050977A1

    公开(公告)日：2010-05-06

    申请号：PCT/US2008/082112

    申请日：2008-10-31

    Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P. ,  VAN BROCKLIN, Andrew L. ,  BAKKER, Chris ,  HUNTER, Mark ,  MARTIN, Eric

    Inventor： VAN BROCKLIN, Andrew L. ,  BAKKER, Chris ,  HUNTER, Mark ,  MARTIN, Eric

    IPC: B41J2/05 ,  B41J2/01

    CPC classification number: B41J2/0458 ,  B41J2/04541 ,  B41J2/04548 ,  B41J2/0455

    Abstract: A die for a thermal drop-on-demand fluid-ejection device includes thermal firing resistors, low-side switches, and high-side switches. The thermal firing resistors are organized over resistor groups such that each thermal firing resistor is located within only one of the resistor groups. The resistor groups are lesser in number than the thermal firing resistors. Each thermal firing resistor has a first end and a second end. The low-side switches are equal in number to the thermal firing resistors. Each low-side switch connects the second end of a corresponding thermal firing resistor to a low voltage. The high-side switches are equal in number to the resistor groups. Each high-side switch connects the first ends of the thermal firing resistors of a corresponding resistor group to power providing a voltage greater than the low voltage.

    Abstract translation: 用于热滴式流体喷射装置的模具包括热激发电阻器，低侧开关和高侧开关。 热触发电阻器组织在电阻器组上，使得每个热激发电阻器仅位于电阻器组之中。 电阻组的数量比热激发电阻小。 每个热激电阻器具有第一端和第二端。 低边开关的数量与热激发电阻的数量相等。 每个低侧开关将相应的热激发电阻器的第二端连接到低电压。 高边开关的数量与电阻组数量相等。 每个高侧开关将相应电阻器组的热激发电阻器的第一端连接到提供大于低电压的电压的功率。

    FLUID ACTUATORS CONNECTED TO FIELD EFFECT TRANSISTORS
    15.
    发明申请
    FLUID ACTUATORS CONNECTED TO FIELD EFFECT TRANSISTORS 审中-公开

    公开(公告)号：WO2020068032A1

    公开(公告)日：2020-04-02

    申请号：PCT/US2018/052431

    申请日：2018-09-24

    Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.

    Inventor： MARTIN, Eric ,  PRZYBYLA, James R ,  CICILI, Rogelio

    IPC: B41J2/14 ,  B41J2/07 ,  B41J2/175

    Abstract: Examples include a fluidic die. The fluidic die comprises an array of field effect transistors. Connecting members electrically connect at least some of the field effect transistors of the array of field effect transistors, and the field effect transistors of the array are arranged into respective sets of field effect transistors. The fluidic die further comprises a first fluid actuator connected to a first set of field effect transistors having a first number of field effect transistors. The die includes a second fluid actuator connected to a second respective set of field effect transistors having a second number of field effect transistors that is different than the first number of field effect transistors.

    MICROFLUDIC DEVICES FOR VALIDATING FLUIDIC UNIFORMITY
    16.
    发明申请
    MICROFLUDIC DEVICES FOR VALIDATING FLUIDIC UNIFORMITY 审中-公开

    公开(公告)号：WO2020032955A1

    公开(公告)日：2020-02-13

    申请号：PCT/US2018/046074

    申请日：2018-08-09

    Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.

    Inventor： MARTIN, Eric ,  GARDNER, James Michael

    IPC: B81B7/02 ,  G01N33/48 ,  G01N35/10 ,  B01L3/00

    Abstract: A microfluidic device for validating fluidic uniformity may include a chamber defined in the microfluidic device. and a plurality of sensors located within the chamber. The plurality of sensors being positioned within the chamber in a symmetrical location about a least one element of the chamber. The microfluidic device may also include control logic to activate the sensors to measure a property of a fluid within the chamber and determine whether the element affects the measurement of the property of the fluid provided by the sensors. The control logic may also, in response to a determination that the element does not affect the measurement of the property of the fluid provided by the sensors, determine if the property measured by all the sensors at their respective symmetrical locations within the chamber are uniform within a range of values. The control logic may also, in response to a determination that the element does affect the measurement of the property of the fluid provided by the sensors, measure the property between symmetric pairs of the sensors.

    FLUIDIC DIE WITH MONITORING CIRCUIT FAULT PROTECTION
    17.
    发明申请
    FLUIDIC DIE WITH MONITORING CIRCUIT FAULT PROTECTION 审中-公开

    公开(公告)号：WO2019221705A1

    公开(公告)日：2019-11-21

    申请号：PCT/US2018/032761

    申请日：2018-05-15

    Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.

    Inventor： MARTIN, Eric ,  MCMAHON, Terry ,  SCHULTE, Donald

    IPC: B41J2/175 ,  B41J2/14 ,  H01H85/04

    Abstract: A fluidic die includes a plurality of fluid chambers, each fluid chamber including an electrode exposed to an interior of the fluid chamber and having a corresponding fluid actuator operating a high voltage separated from the fluid chamber and electrode by an insulating material, and monitoring circuitry, operating at a low voltage, to monitor a condition of each fluid chamber. For each fluid chamber the monitoring circuitry includes a sense node and a conductor connecting the electrode to the sense node, the conductor having a geometry to form at least one region of higher current density relative to remaining portions of the conductor, the at least one region of higher current density to fail and create an open to protect the low-voltage monitoring circuitry in response to a fault current caused by a short circuit of the high voltage fluid actuator to the electrode.

    ZONAL ACTUATOR FAULT DETECTION
    19.
    发明申请
    ZONAL ACTUATOR FAULT DETECTION 审中-公开

    公开(公告)号：WO2019172872A1

    公开(公告)日：2019-09-12

    申请号：PCT/US2018/020876

    申请日：2018-03-05

    Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.

    Inventor： ANDERSON, Daryl E. ,  MARTIN, Eric ,  GARDNER, James Michael

    IPC: B41J29/46 ,  G01R17/02 ,  B41J2/14

    Abstract: In one example in accordance with the present disclosure, a fluidic die is described is described. The fluidic die includes an array of fluid actuators grouped into zones. Each zone includes a number of fluid actuators and at least one fault detection device. The fault detection device includes a comparator to compare at least one of a representation of a supply voltage and a return voltage supplied to the zone against a voltage threshold. The fault detection device also includes a fault capture device to store an output of the comparator.

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