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：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：US11084282B2

公开(公告)日：2021-08-10

申请号：US16486943

申请日：2017-04-24

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

Inventor： Daryl E Anderson ,  James Gardner

IPC: B41J2/125 ,  B41J2/045 ,  G01L5/1627 ,  B41J2/14 ,  B41J29/393

Abstract: A fluid ejection die includes a plurality of actuation devices to eject fluid drops, at least one strain gauge sensor to sense strain, and a comparator. The comparator is to provide a fault signal in response to the sensed strain exceeding an impact threshold.

公开(公告)号：US11052656B2

公开(公告)日：2021-07-06

申请号：US16613190

申请日：2017-07-11

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 fluidic die is described. The fluidic die includes an array of fluid actuators grouped into primitives. The fluidic die also includes a fluid actuator controller to selectively activate fluid actuators via activation data. The fluidic die also includes an array of actuator evaluators, wherein each actuator evaluator of the fluidic die is coupled to a subset of the array of fluid actuators. The actuator evaluators selectively evaluate an actuator characteristic of a selected fluid actuator based on: an output of an actuator sensor paired with the selected fluid actuator, the activation data, and an evaluation control signal.

公开(公告)号：US11046071B2

公开(公告)日：2021-06-29

申请号：US16483513

申请日：2017-04-05

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

Inventor： Eric Martin ,  Daryl E Anderson ,  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 actuator sensors disposed on the fluid ejection die to sense a characteristic of a corresponding actuator. 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. The die also includes a number of disable devices. Each disable device 1) is coupled to a respective actuator of the number of actuators and 2) disables a corresponding actuator when the corresponding actuator is determined to be malfunctioning.

公开(公告)号：US10926537B2

公开(公告)日：2021-02-23

申请号：US16490842

申请日：2017-04-24

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

Inventor： James M Gardner ,  Berkeley Fisher ,  Daryl E Anderson

IPC: B41J2/14

Abstract: A fluidic die may include a substrate having a flexible region opposite a fluid supply passage within the substrate, a nozzle supported by the substrate proximate the flexible region and a strain sensor on the flexible region of the substrate. The strain sensor may sense strain during flexing of the flexible region to sense fluid back pressure changes.

公开(公告)号：US20200298584A1

公开(公告)日：2020-09-24

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

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：US20200023638A1

公开(公告)日：2020-01-23

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.

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.

公开(公告)号：US10124579B2

公开(公告)日：2018-11-13

申请号：US15543420

申请日：2015-01-30

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

Inventor： Daryl E Anderson ,  George H Corrigan ,  Scott A Linn

IPC: B41J2/045 ,  B41J2/14 ,  B41J2/175 ,  B41J2/145

Abstract: An inkjet printhead including a plurality of printhead dies, each printhead die including at least one crack sense resistor, at least one analog bus connected to each printhead die, and a controller separate from the plurality of printhead dies. The controller is configured to provide a known current to the at least one crack sense resistor of each printhead die in a selectable pattern via the at least one analog bus and to determine whether the printhead dies are cracked based on resulting voltages produced on the at least one analog bus.