公开(公告)号：US11260656B2

公开(公告)日：2022-03-01

申请号：US16763246

申请日：2017-12-15

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

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

IPC: B41J2/045

Abstract: A fluidic die that includes at least one temperature sensor coupled to at least one zone of the fluidic die, a setpoint register to receive a target temperature setpoint for the fluidic die wherein a detected temperature presented by the at least one temperature sensor is compared to the target temperature setpoint using a comparator module to get a firing pulse adjustment value, and a firing pulse used to convey an amount of fluid within the die is adjusted using the firing pulse adjustment value.

公开(公告)号：US11250146B2

公开(公告)日：2022-02-15

申请号：US16495227

申请日：2018-12-03

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

Inventor： James Michael Gardner ,  Scott A. Linn ,  Stephen D. Panshin ,  Jefferson P. Ward ,  David Owen Roethig

IPC: G06F21/60 ,  B41J2/175 ,  G06F13/42 ,  G06F21/44

Abstract: In an example, a method comprises, by logic circuitry associated with a replaceable print apparatus component, responding to a first validation request sent via an I2C bus to a first address associated with the logic circuitry with a first validation response; and responding to a second validation request sent via the I2C bus to a second address associated with the logic circuitry with a second validation response.

公开(公告)号：US11186081B2

公开(公告)日：2021-11-30

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：US20210331465A1

公开(公告)日：2021-10-28

申请号：US16619029

申请日：2017-07-12

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

Inventor： Scott A Linn ,  Eric Martin ,  Vincent C Korthuis ,  James Michael Gardner

IPC: B41J2/045

Abstract: A fluidic die includes a number of actuators to eject fluid from the fluidic die. The number of actuators form a number of primitives. The fluidic die includes a plurality of delays within a column of the primitives, and a processing device to control the delays through which a number of activation pulses pass. The activation pulses activate each of the actuators associated with the primitives. The activation pulses are delayed between the primitives via at least one of the delays to reduce peak power demands of the fluidic die.

公开(公告)号：US20210323301A1

公开(公告)日：2021-10-21

申请号：US17251241

申请日：2018-11-16

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

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

IPC: B41J2/045 ,  G01K7/16 ,  G01K1/024 ,  B41J2/05

Abstract: Examples of a fluidic die for temperature sensing are described herein. In some examples, the fluidic die includes a plurality of resistor segments connected in series. In some examples, the fluidic die may include a plurality of first switches connected to a first side of each of the plurality of resistor segments. In some examples, the fluidic die includes a plurality of second switches connected to a second side of each of the plurality of resistor segments. In some examples, the fluidic die includes a differential amplifier to output a temperature voltage signal, where a first input of the differential amplifier is each of the first switches, and where a second input of the differential amplifier is connected each of the plurality of second switches.

公开(公告)号：US20210107279A1

公开(公告)日：2021-04-15

申请号：US16956045

申请日：2018-03-05

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

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

IPC: B41J2/045 ,  G01R17/02

Abstract: In one example in accordance with the present disclosure, a fluidic die is described is described. The fluidic die includes an array of fluid actuators grouped into zones. Each zone includes a number of fluid actuators and at least one fault detection device. The fault detection device includes a comparator to compare at least one of a representation of a supply voltage and a return voltage supplied to the zone against a voltage threshold. The fault detection device also includes a fault capture device to store an output of the comparator.

公开(公告)号：US20200309666A1

公开(公告)日：2020-10-01

申请号：US16760933

申请日：2017-12-11

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

Inventor： Eric Martin ,  James Michael Gardner ,  James A. Feinn ,  Rogelio Cicili

IPC: G01N15/06 ,  B41J2/14 ,  G01N27/07

Abstract: A fluid particle concentration detection device may include at least one electrode disposed within a fluidic passageway of a fluidic die, and control circuitry to activate the electrode within the fluidic die. An impedance sensed at the electrode corresponds to a particle concentration within the fluid.

公开(公告)号：US10725490B2

公开(公告)日：2020-07-28

申请号：US16318201

申请日：2016-10-13

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

Inventor： James Michael Gardner ,  Eric Martin ,  David Maxfield

IPC: G05F3/08 ,  H02H9/00 ,  B41J2/045 ,  B41J2/14

Abstract: In some examples, a control circuit for a bypass capacitor includes a switch assembly that is activatable between a first state to connect the bypass capacitor between nodes, and a second state to disconnect the bypass capacitor between the nodes. The switch assembly includes a first switch to activate a first path comprising a first resistance to begin charging the bypass capacitor, and a second switch to, a delayed time after the activating of the first path, activate a second path comprising a second resistance lower than the first resistance, the activated second path connecting the bypass capacitor between the nodes.

公开(公告)号：US10335819B2

公开(公告)日：2019-07-02

申请号：US15329516

申请日：2014-07-31

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

Inventor： James Michael Gardner ,  Eric T Martin

IPC: B05B12/08 ,  B41J2/045 ,  B41J2/175

Abstract: Examples of an apparatus and method are disclosed herein. In an example of the method, the performance of an ejection device that dispenses a composition is measured, information representative of the measured performance of the ejection device is generated, and the information representative of the measured performance of the ejection device is recorded so that the information is visually perceptible.

公开(公告)号：US20190126631A1

公开(公告)日：2019-05-02

申请号：US16094138

申请日：2016-04-29

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

Inventor： Daryl E. Anderson ,  James Michael Gardner ,  Scott A. Linn ,  Michael W. Cumbie ,  Berkeley Fisher

IPC: B41J2/175

Abstract: An example printing cartridge includes a fluid container, a plurality of capacitor plates to detect fluid in the fluid container, each of the capacitor plates associated with a respective fluid level, and a shift register to capture fluid level information from the plurality of capacitor plates.