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    ACTIVE CIRCUIT ELEMENTS ON A MEMBRANE
    1.
    发明公开
    ACTIVE CIRCUIT ELEMENTS ON A MEMBRANE 审中-公开

    公开(公告)号：US20230382127A1

    公开(公告)日：2023-11-30

    申请号：US18032535

    申请日：2020-10-23

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

    Inventor： Eric T. Martin ,  James R. Przybyla

    IPC: B41J2/18

    CPC classification number: B41J2/18 ,  B41J2202/12 ,  B41J2202/13

    Abstract: According to examples, an apparatus may include a substrate having a fluid recirculation channel and a membrane adjacent to the fluid recirculation channel, in which the membrane is portion of the substrate having a smaller thickness than other portions of the substrate. The apparatus may also include a component layer, in which a fluid ejection chamber may be formed in the component layer. The fluid ejection chamber may include a nozzle and fluid may be received into the fluid ejection chamber through an inlet port and recirculated to the fluid recirculation channel through an outlet port. The apparatus may further include active circuit elements formed on the membrane, in which the active circuit elements may control ejection of fluid from the fluid ejection chamber through the nozzle.

    Fluid actuator registers
    2.
    发明授权
    Fluid actuator registers 有权

    公开(公告)号：US11037036B2

    公开(公告)日：2021-06-15

    申请号：US16486119

    申请日：2017-04-14

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

    Inventor： Daryl E. Anderson ,  Eric T. Martin ,  James R. Przybyla

    IPC: G06K15/02 ,  G06K15/10 ,  G06F9/30 ,  G02B26/00

    Abstract: Examples include a fluidic die. The fluidic die may comprise an array of fluid actuators, an actuation data register, a mask register, and actuation logic. The actuation data register may store actuation data that indicates fluid ejectors to actuate for a set of actuation events. The mask register may store mask data that indicates a set of fluid actuators enabled for actuation for a respective actuation event of the set of actuation events. The actuation logic may electrically actuate a subset of the fluid actuators based at least in part on the actuation data register and the mask register for the respective actuation event.

    FLUIDIC DIE WITH LOW VOLTAGE MONITORING CIRCUIT INCLUDING HIGH VOLTAGE TOLERANT TRANSISTOR
    3.
    发明申请
    FLUIDIC DIE WITH LOW VOLTAGE MONITORING CIRCUIT INCLUDING HIGH VOLTAGE TOLERANT TRANSISTOR 有权

    公开(公告)号：US20210053343A1

    公开(公告)日：2021-02-25

    申请号：US16978223

    申请日：2018-05-15

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

    Inventor： Eric Martin ,  James R. Przybyla ,  Rogelio Cicili

    IPC: B41J2/045 ,  H01L27/02 ,  H02H3/20 ,  B41J2/14

    Abstract: A fluidic die including fluid chambers, each including an electrode exposed to an interior of the fluid chamber and each having a corresponding fluid actuator operating at a first voltage level. Monitoring circuitry, operating at a second voltage level lower than the first voltage level, includes a select transistor and a pulldown transistor for each fluid chamber to selectively couple to the electrode, at least the select transistor being a high voltage tolerant transistor to operate at the second voltage in a normal operating condition and having a breakdown voltage level greater than the first voltage level to prevent a fault current from flowing into the select transistor from the electrode in a fault condition if the fluid actuator short-circuits to the electrode.

    Arrangements of circuit elements and fluidic elements
    4.
    发明授权
    Arrangements of circuit elements and fluidic elements 有权

    公开(公告)号：US12233647B2

    公开(公告)日：2025-02-25

    申请号：US18032534

    申请日：2020-10-23

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

    Inventor： Eric T. Martin ,  James R. Przybyla

    IPC: B41J2/145 ,  B41J2/14

    Abstract: In some examples, a fluidic die includes an arrangement of fluidic elements to dispense a fluid, each fluidic element of the fluidic elements including a fluidic actuator and a fluid chamber. An array of fluid feed holes is arranged in a plurality of dimensions to communicate the fluid with the fluidic elements, where each of multiple fluid feed holes along a first dimension of the plurality of dimensions is distinct from multiple fluid feed holes along a second dimension of the plurality of dimensions. The fluidic die includes first circuit elements operable at a first power supply voltage, the first circuit elements interspersed in regions between the fluidic elements along different axes of the fluidic die. The fluidic die includes second circuit elements operable at a second power supply voltage greater than the first power supply voltage, the second circuit elements comprising active devices and placed in a region outside of a boundary defining a space in which the fluidic elements and the first circuit elements are placed.

    ARRANGEMENTS OF CIRCUIT ELEMENTS AND FLUIDIC ELEMENTS
    6.
    发明公开
    ARRANGEMENTS OF CIRCUIT ELEMENTS AND FLUIDIC ELEMENTS 审中-公开

    公开(公告)号：US20230382116A1

    公开(公告)日：2023-11-30

    申请号：US18032534

    申请日：2020-10-23

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

    Inventor： Eric T. Martin ,  James R. Przybyla

    IPC: B41J2/145 ,  B41J2/14

    CPC classification number: B41J2/145 ,  B41J2/1404 ,  B41J2202/13 ,  B41J2202/12

    Abstract: In some examples, a fluidic die includes an arrangement of fluidic elements to dispense a fluid, each fluidic element of the fluidic elements including a fluidic actuator and a fluid chamber. An array of fluid feed holes is arranged in a plurality of dimensions to communicate the fluid with the fluidic elements, where each of multiple fluid feed holes along a first dimension of the plurality of dimensions is distinct from multiple fluid feed holes along a second dimension of the plurality of dimensions. The fluidic die includes first circuit elements operable at a first power supply voltage, the first circuit elements interspersed in regions between the fluidic elements along different axes of the fluidic die. The fluidic die includes second circuit elements operable at a second power supply voltage greater than the first power supply voltage, the second circuit elements comprising active devices and placed in a region outside of a boundary defining a space in which the fluidic elements and the first circuit elements are placed.

    FLUID EJECTION WITH MICROPUMPS AND PRESSURE-DIFFERENCE BASED FLUID FLOW
    10.
    发明申请
    FLUID EJECTION WITH MICROPUMPS AND PRESSURE-DIFFERENCE BASED FLUID FLOW 有权

    公开(公告)号：US20210362508A1

    公开(公告)日：2021-11-25

    申请号：US16603570

    申请日：2018-07-23

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

    Inventor： James R. Przybyla ,  Jordan E. Morris

    IPC: B41J2/175 ,  B41J2/14

    Abstract: The fluid ejection device includes a plurality of nozzles and a plurality of ejection chambers that includes a respective ejection chamber fluidically coupled to a respective nozzle. A plurality of inlet passages are fluidically coupled to the ejection chambers and input fluid to the ejection chambers at a first pressure. A plurality of outlet passages are fluidically coupled to the ejection chambers and output fluid from the ejection chambers at a second pressure that is less than the first pressure. Fluid circulates through the ejection chambers based on the pressure difference between the first and second pressure. The fluid ejection device also includes at least one micropump fluidically coupled to at least one ejection chamber to pump fluid through the at least one ejection chamber.

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