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    DRIVE BUBBLE EVALUATION
    11.
    发明申请
    DRIVE BUBBLE EVALUATION 审中-公开

    公开(公告)号：US20190366709A1

    公开(公告)日：2019-12-05

    申请号：US16462298

    申请日：2017-02-27

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

    Inventor： Daryl E Anderson ,  Eric Martin ,  James Michael Gardner ,  Tsuyoshi Yamashita

    IPC: B41J2/045

    Abstract: In some examples, a fluid ejection system can include one or more drive bubble devices and a sensor for each drive bubble device of the one or more drive bubble devices to detect a characteristic of each drive bubble device. The fluid ejection system can also include a controller. The controller can be configured to evaluate a first drive bubble device of the one or more drive bubble devices, and during the evaluation of the first drive bubble device, utilize one or more other drive bubble devices of the one or more drive bubble devices.

    FLUID EJECTION DEVICE
    12.
    发明申请
    FLUID EJECTION DEVICE 审中-公开

    公开(公告)号：US20190168512A1

    公开(公告)日：2019-06-06

    申请号：US16270664

    申请日：2019-02-08

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

    Inventor： Alexander Govyadinov ,  Tsuyoshi Yamashita ,  Erik D. Torniainen

    IPC: B41J2/18 ,  B41J2/14 ,  B41J2/175

    Abstract: A fluid ejection device includes a fluid slot, a first fluid ejection chamber communicated with the fluid slot and including a first drop ejecting element, a second fluid ejection chamber including a second drop ejecting element, and a fluid circulation path including a first portion communicated with the fluid slot and the second fluid ejection chamber, and a second portion communicated with the first fluid ejection chamber and the second fluid ejection chamber, with the fluid circulation path including a fluid circulating element within the first portion.

    UNSUPPORTED TOP HAT LAYERS IN PRINTHEAD DIES
    14.
    发明公开
    UNSUPPORTED TOP HAT LAYERS IN PRINTHEAD DIES 审中-公开

    公开(公告)号：US20230230790A1

    公开(公告)日：2023-07-20

    申请号：US18123134

    申请日：2023-03-17

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

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

    IPC: H01H85/02

    CPC classification number: H01H85/0241 ,  H01H2085/0266 ,  H01H2085/0275 ,  H01H2085/0291

    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.

    UNSUPPORTED TOP HAT LAYERS IN PRINTHEAD DIES
    15.
    发明申请
    UNSUPPORTED TOP HAT LAYERS IN PRINTHEAD DIES 有权

    公开(公告)号：US20220184946A1

    公开(公告)日：2022-06-16

    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

    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.

    CONNECTED FIELD EFFECT TRANSISTORS
    16.
    发明申请
    CONNECTED FIELD EFFECT TRANSISTORS 有权

    公开(公告)号：US20210246013A1

    公开(公告)日：2021-08-12

    申请号：US17251236

    申请日：2018-09-24

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

    Inventor： Eric Martin ,  Rogelio Cicili ,  Tsuyoshi Yamashita

    IPC: B81B7/00 ,  B81B3/00 ,  B81B1/00 ,  B81C1/00

    Abstract: Examples include a fluidic die. The fluidic die comprises an array of field effect transistors including field effect transistors of a first size and field effect transistors of a second size. At least one connecting member interconnects at least some of the field effect transistors of the array of field effect transistors. The fluidic die further comprises a first fluid actuator connected to a first set of field effect transistors having at least one field effect transistor of the first size. The die includes a second fluid actuator connected to a second respective set of field effect transistors having a first respective field effect transistor of the second size interconnected to at least one other field effect transistor of the array.

    Fluid ejection device
    17.
    发明授权
    Fluid ejection device 有权

    公开(公告)号：US11059290B2

    公开(公告)日：2021-07-13

    申请号：US16095575

    申请日：2016-07-29

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

    Inventor： Alexander Govyadinov ,  Tsuyoshi Yamashita ,  Nicholas McGuinness ,  David P Markel ,  Erik D Tornianen

    IPC: B41J2/14 ,  B41J2/21

    Abstract: A fluid ejection device includes a fluid slot, three laterally adjacent fluid ejection chambers each having a drop ejecting element therein, a fluid circulation path communicated with each of the three laterally adjacent fluid ejection chambers, and a fluid circulating element within the fluid circulation path, with at least two laterally adjacent fluid ejection chambers of the three laterally adjacent fluid ejection chambers to substantially simultaneously eject drops of fluid therefrom such that the drops of fluid are to coalesce during flight.

    Drive bubble evaluation
    18.
    发明授权
    Drive bubble evaluation 有权

    公开(公告)号：US10850506B2

    公开(公告)日：2020-12-01

    申请号：US16462298

    申请日：2017-02-27

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

    Inventor： Daryl E Anderson ,  Eric Martin ,  James Michael Gardner ,  Tsuyoshi Yamashita

    IPC: B41J2/045 ,  B41J29/38

    Abstract: In some examples, a fluid ejection system can include one or more drive bubble devices and a sensor for each drive bubble device of the one or more drive bubble devices to detect a characteristic of each drive bubble device. The fluid ejection system can also include a controller. The controller can be configured to evaluate a first drive bubble device of the one or more drive bubble devices, and during the evaluation of the first drive bubble device, utilize one or more other drive bubble devices of the one or more drive bubble devices.

    FLUID EJECTION DEVICE
    19.
    发明申请
    FLUID EJECTION DEVICE 审中-公开

    公开(公告)号：US20190134987A1

    公开(公告)日：2019-05-09

    申请号：US16095478

    申请日：2016-07-29

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

    Inventor： Nicholas McGuinness ,  Alexander Govyadinov ,  Tsuyoshi Yamashita ,  Erik D Torniainen ,  David P Markel

    IPC: B41J2/18

    Abstract: A fluid ejection device includes a fluid slot, two laterally adjacent fluid ejection chambers each having a drop ejecting element therein, a fluid circulation path communicated with the fluid slot and each of the two laterally adjacent fluid ejection chambers, and a fluid circulating element within the fluid circulation path, with the fluid circulating element laterally adjacent at least one of the two laterally adjacent fluid ejection chambers, and the two laterally adjacent fluid ejection chambers to substantially simultaneously eject drops of fluid therefrom such that the drops of fluid are to coalesce during flight.

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