公开(公告)号：US11260670B2

公开(公告)日：2022-03-01

申请号：US16608876

申请日：2017-12-11

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

Inventor： Steven T Castle ,  Daryl E Anderson ,  James Michael Gardner ,  Eric Martin

IPC: B41J2/195 ,  B41J2/175 ,  B41J29/393

Abstract: A fluid reservoir (100) includes a circuit (105) extending in the fluid reservoir to be at least partially in contact with fluid (120) inside the fluid reservoir during use, at least a first impedance sensor (110) and second impedance sensor (115) coupled to the circuit, wherein the at least first and second impedance sensors are to output impedance values indicative of a degree of particle separation in the fluid.

公开(公告)号：US20210362489A1

公开(公告)日：2021-11-25

申请号：US17046881

申请日：2018-06-11

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

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

IPC: B41J2/045

Abstract: Examples of a fluidic die for thermal zone selection with a sequencer and decoders are described herein. In some examples, the fluidic die includes multiple thermal zones. Each thermal zone includes a temperature sensor, a fluidic actuator and a decoder. The fluidic die also includes shared thermal control circuitry to process an output of the temperature sensor in a selected thermal zone. The fluidic die further includes a sequencer to output a sequence state to select one thermal zone at a time for processing by the shared thermal control circuitry. The decoder of the selected thermal zone decodes the sequence state.

公开(公告)号：US11173711B2

公开(公告)日：2021-11-16

申请号：US16762956

申请日：2017-11-22

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

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

IPC: B41J2/045

Abstract: A fluidic die that may, in an example, include a regulation module communicatively coupled to a clock generator to receive a clock signal, and a firing pulse adjustment regulator communicatively coupled to the regulation module to receive an adjustment value wherein the regulation module, when executed by a processor, adjusts an input firing pulse at the fluidic die based on the adjustment value.

公开(公告)号：US20210276324A1

公开(公告)日：2021-09-09

申请号：US16482793

申请日：2017-04-14

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

Inventor： Eric Martin ,  Daryl E Anderson

IPC: B41J2/045

Abstract: In some examples, a fluidic die includes a set of fluid actuators arranged in an order, and a controller to determine, based on input control information relating to controlling actuation of the plurality of fluid actuators, whether a first fluid actuator of the plurality of fluid actuators is to be actuated and whether a second fluid actuator within a specified proximity of the first fluid actuator in the order is to be actuated, and in response to determining that the first fluid actuator is to be actuated and the second fluid actuator within the specified proximity of the first fluid actuator in the order is not to be actuated, activate a delay element associated with the first fluid actuator, the delay element to delay an activation signal propagated to selected fluid actuators of the set of fluid actuators in response to an actuation event.

公开(公告)号：US20210276321A1

公开(公告)日：2021-09-09

申请号：US16317891

申请日：2016-10-24

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

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

IPC: B41J2/045

Abstract: Example implementations relate to current leakage testing of a fluid ejection die. For example, a fluid ejection die may include plurality of nozzles, each nozzle among the plurality of nozzles including a nozzle sensor and a fluid ejector. The plurality of nozzle sensors may comprise a first subset and a second subset, each nozzle sensor among the plurality of nozzle sensors of the first subset may be electrically coupled to a first control line by a respective switch among a first group of switches, and each nozzle sensor among the plurality of nozzle sensors of the second subset may be electrically coupled to a second control line by a respective switch among a second group of switches. The fluid ejection die may include a control circuit to perform a current leakage test of the plurality of nozzles using the first control line and the second control line.

公开(公告)号：US11090930B2

公开(公告)日：2021-08-17

申请号：US16619041

申请日：2017-07-13

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

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

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

Abstract: A fluidic die may include an array of fluid actuators comprising a first set of fluid actuators and a second set of fluid actuators. The fluidic die may further include a first power line connected to the first set of fluid actuators, a second power line connected to the second set of fluid actuators and a third power line connected to the first set of fluid actuators.

公开(公告)号：US11090928B2

公开(公告)日：2021-08-17

申请号：US16763097

申请日：2017-12-11

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

Inventor： Daryl E. Anderson ,  Eric Martin ,  James Michael Gardner ,  James A. Feinn

IPC: B41J2/045 ,  B41J2/14

Abstract: A method of distinguishing between fluids may include providing a current to an electrode disposed within a fluidic passageway of a fluidic die, the current to be forced into a fluid within the fluidic die, sensing an impedance at the electrode, and determining a particle vehicle separation level of the fluid based on the sensed impedance between a first instance and a second instance.

公开(公告)号：US11090924B2

公开(公告)日：2021-08-17

申请号：US16492276

申请日：2017-04-14

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

Inventor： Daryl E Anderson ,  Eric Martin

IPC: B41J2/045 ,  B41J2/21

Abstract: A fluidic die includes an array of nozzles, each nozzle to eject a fluid drop in response to a corresponding actuation signal having an actuation value. The fluidic dies includes nozzle select logic to provide, for each nozzle, a nozzle select signal having a select value or a non-select value, with a select value indicating the nozzle is select to eject a fluid drop, a nozzle displacement register to receive displacement bits, each displacement bit corresponding to a different one of the nozzles and having an enable value or a disable value, a disable value indicating a defective nozzle, and actuation logic, for each nozzle having a corresponding nozzle select signal having a select value, the actuation logic to provide an actuation signal having an actuation value to an operational neighboring nozzle instead of to the selected nozzle when the corresponding displacement bit has a disable value.

公开(公告)号：US20210221126A1

公开(公告)日：2021-07-22

申请号：US16310922

申请日：2016-10-12

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

Inventor： Eric Martin ,  James Michael Gardner ,  David Maxfield

IPC: B41J2/045

Abstract: In some examples, a control apparatus for thermal management of a fluid ejection device includes a thermal controller to detect a number of a plurality of thermal measurements of the fluid ejection device that exceed a thermal threshold, and in response to determining that the number of thermal measurements that exceed the thermal threshold exceeds a count threshold, deactivating a firing controller of the fluid ejection device.

公开(公告)号：US20210206161A1

公开(公告)日：2021-07-08

申请号：US16973999

申请日：2018-09-24

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

Inventor： Eric Martin ,  James R Przybyla ,  Rogelio Cicili

IPC: B41J2/045 ,  B41J2/14

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.