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    MAPPING ACTUATION SIGNALS TO ACTUATORS
    3.
    发明申请
    MAPPING ACTUATION SIGNALS TO ACTUATORS 审中-公开

    公开(公告)号：US20200307184A1

    公开(公告)日：2020-10-01

    申请号：US16763245

    申请日：2017-12-21

    Applicant: Hewlett-Packard Development Company, L.P.

    Inventor： Vincent C. Korthuis ,  Eric Martin

    IPC: B41J2/045

    Abstract: In some examples, a fluidic die comprises a plurality of actuators and actuation control logic coupled to the plurality of actuators. The fluidic die also includes a multiplexer, coupled to the actuation control logic, to provide the actuation control logic with an actuation signal, the actuation signal to control operation of the plurality of actuators. The fluidic die also comprises an actuation signal generator, coupled to the multiplexer, to provide the multiplexer with a plurality of actuation signals. The fluidic die also includes actuation signal mapping logic to control the multiplexer and the actuation signal generator based on one of a plurality of stored modes, each mode mapping the plurality of actuation signals to the plurality of actuators.

    Unsupported top hat layers in printhead dies
    5.
    发明授权
    Unsupported top hat layers in printhead dies 有权

    公开(公告)号：US11648773B2

    公开(公告)日：2023-05-16

    申请号：US17414413

    申请日：2019-09-06

    Applicant: Hewlett-Packard Development Company, L.P.

    Inventor： Vincent C. Korthuis ,  Huyen Pham ,  Tsuyoshi Yamashita

    IPC: B41J2/14

    CPC classification number: B41J2/1404

    Abstract: In example implementations, a printhead die is provided. The printhead die includes a substrate, a chamber layer formed on the substrate, a plurality of printing fluid ejection chambers coupled to opposite sides of the chamber layer and along a length of the chamber layer, and a top hat layer formed on the chamber layer and the plurality of printing fluid ejection chambers. The chamber layer includes a void to store printing fluid. The top hat layer includes an initial unsupported top hat layer portion over the void, wherein the initial unsupported top hat layer portion comprises a first end that is narrower than a second end.

    FLUIDIC DIES WITH TRANSMISSION PATHS HAVING CORRESPONDING PARASITIC CAPACITANCES
    6.
    发明申请
    FLUIDIC DIES WITH TRANSMISSION PATHS HAVING CORRESPONDING PARASITIC CAPACITANCES 有权

    公开(公告)号：US20210268797A1

    公开(公告)日：2021-09-02

    申请号：US16972119

    申请日：2018-11-21

    Applicant: Hewlett-Packard Development Company, L.P.

    Inventor： Eric T. Martin ,  Vincent C. Korthuis

    IPC: B41J2/14 ,  B41J2/155 ,  B41J2/045

    Abstract: In one example in accordance with the present disclosure, a fluidic die is described. The fluidic die includes an array of firing subassemblies grouped into zones. Each firing subassembly includes 1) a firing chamber, 2) a fluid actuator disposed, and 3) a sensor plate. The fluidic die also includes a measurement device per zone to determine a state of a selected sensor plate. The fluidic die includes a selector per firing subassembly to couple the selected sensor plate to the measurement device. The fluidic die also includes a transmission path between each selector and its corresponding sensor plate. A first transmission path for a particular sensor plate has physical properties such that a parasitic capacitance along the first transmission path corresponds to a parasitic capacitance for a second transmission path of a second sensor plate in the zone, regardless of a difference in transmission path length.

    Fire pulse width adjustment
    7.
    发明授权
    Fire pulse width adjustment 有权

    公开(公告)号：US10532568B2

    公开(公告)日：2020-01-14

    申请号：US16061215

    申请日：2016-04-14

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

    Inventor： Vincent C. Korthuis ,  Eric T Martin ,  Michael W. Cumbie ,  Scott A Linn ,  Pere Esterri

    IPC: B41J2/045

    Abstract: First electronics may determine a count of bubble jet resistors to be fired by a fire pulse group. A fire pulse generator may generate a fire pulse train for bubble jet resistors, the fire pulse train comprising a precursor pulse and a firing pulse separated by a dead time. Second electronics may adjust a width of the fire pulse for the bubble jet resistors of the fire pulse group by maintaining a first edge of the fire pulse relative to the precursor pulse and adjusting a second edge of the fire pulse relative to the precursor pulse based upon the determined count for the fire pulse group.

    Fluidic dies with transmission paths having corresponding parasitic capacitances
    8.
    发明授权
    Fluidic dies with transmission paths having corresponding parasitic capacitances 有权

    公开(公告)号：US11383516B2

    公开(公告)日：2022-07-12

    申请号：US16972119

    申请日：2018-11-21

    Applicant: Hewlett-Packard Development Company, L.P.

    Inventor： Eric T. Martin ,  Vincent C. Korthuis

    IPC: B41J2/14 ,  B41J2/045 ,  B41J2/155

    Abstract: In one example in accordance with the present disclosure, a fluidic die is described. The fluidic die includes an array of firing subassemblies grouped into zones. Each firing subassembly includes 1) a firing chamber, 2) a fluid actuator disposed, and 3) a sensor plate. The fluidic die also includes a measurement device per zone to determine a state of a selected sensor plate. The fluidic die includes a selector per firing subassembly to couple the selected sensor plate to the measurement device. The fluidic die also includes a transmission path between each selector and its corresponding sensor plate. A first transmission path for a particular sensor plate has physical properties such that a parasitic capacitance along the first transmission path corresponds to a parasitic capacitance for a second transmission path of a second sensor plate in the zone, regardless of a difference in transmission path length.

    CAVITATION PLATE TO PROTECT A HEATING COMPONENT AND DETECT A CONDITION
    9.
    发明申请
    CAVITATION PLATE TO PROTECT A HEATING COMPONENT AND DETECT A CONDITION 有权

    公开(公告)号：US20220134745A1

    公开(公告)日：2022-05-05

    申请号：US17434780

    申请日：2019-06-17

    Applicant: Hewlett-Packard Development Company, L.P.

    Inventor： Eric Thomas Martin ,  Tsuyoshi Yamashita ,  Vincent C. Korthuis

    IPC: B41J2/14 ,  B41J2/16

    Abstract: According to examples, an apparatus may include a fluidic chamber, in which fluid is to be temporarily held. The apparatus may also include a heating component to generate heat to form a drive bubble in the fluid held in the fluidic chamber and a cavitation plate may be provided between the fluidic chamber and the heating component. The cavitation plate may be in communication with the fluidic chamber and may physically separate the fluidic chamber from the heating component to protect the heating component. In addition, a controller may determine a condition in the fluidic chamber based on an electrical signal received from the cavitation plate.

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