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    Print material level sensing
    1.
    发明授权
    Print material level sensing 有权

    公开(公告)号：US11285729B2

    公开(公告)日：2022-03-29

    申请号：US16769043

    申请日：2019-04-05

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

    Inventor： James Michael Gardner ,  Daryl E Anderson ,  Evan Clay Dagg

    IPC: B41J2/175

    Abstract: A print material level sensor includes a power node to receive electrical power and a series of print material level sensing devices to receive electrical power from the power node. The print material level sensing devices are disposed at intervals to detect the presence of a print material at successive depth zones in a container. Each print material level sensing device includes a heater to emit heat at its depth zone and a sensor to sense heat at the depth zone. The sensor has control circuitry to turn on the heater of a first print material level sensing device at a first depth zone for a first time duration during the sensing of the first depth zone and to turn on the heater of a second print material level sensing device at a second depth zone for a second time duration during the sensing of the second depth zone.

    On-die actuator evaluation
    4.
    发明授权
    On-die actuator evaluation 有权

    公开(公告)号：US10882310B2

    公开(公告)日：2021-01-05

    申请号：US16473756

    申请日：2017-04-05

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

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

    IPC: B41J2/045 ,  B41J2/14

    Abstract: In one example in accordance with the present disclosure, a fluid ejection die is described. The die includes a number of actuators to manipulate fluid. The actuators are disposed on the fluid ejection die and are grouped as primitives on the fluid ejection die. The fluid ejection die also includes a number of actuators sensors disposed on the fluid ejection die. The nozzle sensors receive a sense voltage indicative of a state of corresponding actuators. Each actuator sensor is coupled to a respective actuator. The fluid ejection die also includes an actuator evaluation device per primitive, which actuator evaluation device is disposed on the fluid ejection die. The actuator evaluation device evaluates an actuator characteristic of any actuator within the primitive and generates an output indicative of a failing actuator of the fluid ejection die.

    Fluid ejection device with nozzle column data groups including drive bubble detect data
    5.
    发明授权
    Fluid ejection device with nozzle column data groups including drive bubble detect data 有权

    公开(公告)号：US10821735B2

    公开(公告)日：2020-11-03

    申请号：US16335180

    申请日：2016-10-26

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

    Inventor： Daryl E Anderson ,  Eric Martin ,  James Gardner

    IPC: B41J2/175 ,  B41J2/045 ,  B41J2/14 ,  B41J2/165

    Abstract: A fluid ejection device including a plurality of primitives each having a same set of addresses and including a plurality of fluid chambers, each fluid chamber corresponding to a different address of the set of addresses and including a firing mechanism. Input logic receives a series of fire pulse groups, each fire pulse group corresponding to an address of the set of addresses and including warming data having an enable value or a disable value and a series of firing bits, each firing bit corresponding to a different primitive and having a firing value or a non-firing value. For each firing bit of each fire pulse group, when the warming data has the enable value, activation logic provides a warming pulse to the firing mechanism of the fluid chamber corresponding to the firing bit when the firing bit has the non-firing value.

    On-die time-shifted actuator evaluation
    6.
    发明授权
    On-die time-shifted actuator evaluation 有权

    公开(公告)号：US10786987B2

    公开(公告)日：2020-09-29

    申请号：US16483811

    申请日：2017-04-05

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

    Inventor： Daryl E Anderson ,  Eric Martin

    IPC: B41J2/045

    Abstract: In one example in accordance with the present disclosure, a fluid ejection die is described. The die includes a number of actuator sensors disposed on the fluid ejection die to sense a characteristic of a corresponding actuator and to output a first voltage corresponding to the sensed characteristic c. Each actuator sensor is coupled to a respective actuator and multiple coupled actuator sensors and actuators are grouped as primitives on the fluid ejection die. The die also includes an actuator evaluation die per primitive to evaluate an actuator characteristic of any actuator within the primitive Based on the first voltage and a threshold voltage. The die also includes a time-shift chain component to communicate a delayed evaluation signal, which delayed evaluation signal delays an evaluation of the actuator characteristic a predetermined amount of time following an activation event.

    ON-DIE ACTUATOR EVALUATION WITH PRE-CHARGED THRESHOLDS
    7.
    发明申请
    ON-DIE ACTUATOR EVALUATION WITH PRE-CHARGED THRESHOLDS 审中-公开

    公开(公告)号：US20200180304A1

    公开(公告)日：2020-06-11

    申请号：US16472960

    申请日：2017-04-05

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

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

    IPC: B41J2/045

    Abstract: In one example in accordance with the present disclosure, a fluid ejection die is described. The die includes a number of actuator sensors disposed on the fluid ejection die to sense a characteristic of a corresponding actuator and to output a first voltage corresponding to the sensed characteristic. Each actuator sensor is coupled to a respective actuator and multiple coupled actuator sensors and actuators are grouped as primitives on the fluid ejection die. The die also includes a pre-charge device per primitive to pre-charge a corresponding threshold voltage storage device to a threshold voltage. The die also includes an actuator evaluation die per primitive to evaluate an actuator characteristic of any actuator within the primitive. Based on the first voltage and a pre-charged threshold voltage.

    FLUIDIC DIE WITH MASK REGISTER SETS
    8.
    发明申请
    FLUIDIC DIE WITH MASK REGISTER SETS 审中-公开

    公开(公告)号：US20200031120A1

    公开(公告)日：2020-01-30

    申请号：US16482990

    申请日：2017-04-14

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

    Inventor： Daryl E Anderson ,  Eric T Martin

    IPC: B41J2/045 ,  G06K15/10 ,  G11C5/02

    Abstract: A fluidic die may include an array of fluid actuators, an actuation data register to store actuation data that indicates each fluid actuator to actuate for a set of actuation events, at least one storage device to store sets of mask data, each set of mask data indicating a set of fluid actuators of the array enabled for actuation for a respective actuation event of the set of actuation events, sequencing logic coupled to the at least one storage device to select one of the sets of mask data after each actuation event of the set of actuation events and actuation logic to electrically actuate a subset of the fluid actuators based at least in part on the actuation data register and the sequenced set of mask data for the respective actuation event.

    ON-DIE ACTUATOR EVALUATION
    9.
    发明申请
    ON-DIE ACTUATOR EVALUATION 审中-公开

    公开(公告)号：US20200016888A1

    公开(公告)日：2020-01-16

    申请号：US16473756

    申请日：2017-04-05

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

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

    IPC: B41J2/045

    Abstract: In one example in accordance with the present disclosure, a fluid ejection die is described. The die includes a number of actuators to manipulate fluid. The actuators are disposed on the fluid ejection die and are grouped as primitives on the fluid ejection die. The fluid ejection die also includes a number of actuators sensors disposed on the fluid ejection die. The nozzle sensors receive a sense voltage indicative of a state of corresponding actuators. Each actuator sensor is coupled to a respective actuator. The fluid ejection die also includes an actuator evaluation device per primitive, which actuator evaluation device is disposed on the fluid ejection die. The actuator evaluation device evaluates an actuator characteristic of any actuator within the primitive and generates an output indicative of a failing actuator of the fluid ejection die.

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