公开(公告)号：US10040281B2

公开(公告)日：2018-08-07

申请号：US15519298

申请日：2014-10-29

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

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

IPC: B41J2/045 ,  B41J2/155 ,  B41J2/14

Abstract: A wide array printhead module includes a plurality of printhead die. Each of the printhead die includes a number of sensors to measure properties of a number of elements associated with the printhead die. The wide array printhead module further includes an application specific integrated circuit (ASIC) to command and control each of the printhead die. The ASIC is located off any of the printhead die.

公开(公告)号：US09889642B2

公开(公告)日：2018-02-13

申请号：US15307305

申请日：2014-06-11

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

Inventor： Daryl E Anderson ,  Eric T Martin

IPC: B41J2/165 ,  B41J2/21 ,  B41J2/045

CPC classification number: B41J2/0451 ,  B41J2/04586 ,  B41J2/16579 ,  B41J2/2139 ,  B41J2/2142 ,  B41J2202/17

Abstract: In an example, a method of managing a nozzle condition test on a printhead includes instructing a printhead to perform impedance measurements on a plurality of nozzles in a first set of nozzles. The method also includes retrieving from the printhead, an impedance measurement result corresponding with each nozzle, where each impedance measurement result indicates a nozzle condition of its corresponding nozzle.

公开(公告)号：US09776395B2

公开(公告)日：2017-10-03

申请号：US15306737

申请日：2014-04-30

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

Inventor： Daryl E Anderson ,  Eric T Martin ,  Peter James Fricke

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

CPC classification number: B41J2/0451 ,  B41J2/04541 ,  B41J2/04555 ,  B41J2/04573 ,  B41J2/0458 ,  B41J2/04588 ,  B41J2/04598 ,  B41J2/165 ,  B41J2/16579 ,  B41J2/175

Abstract: In an example, a method for determining an issue in an inkjet nozzle includes providing an initial fire pulse for firing a nozzle, and receiving the initial fire pulse as a delayed fire pulse at a primitive of the nozzle. The method includes firing the nozzle with the delayed fire pulse, and determining a first time instant following the delayed fire pulse for taking a first impedance measurement across the nozzle.

公开(公告)号：US20170232734A1

公开(公告)日：2017-08-17

申请号：US15519298

申请日：2014-10-29

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

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

IPC: B41J2/045 ,  B41J2/14 ,  B41J2/155

CPC classification number: B41J2/04541 ,  B41J2/0458 ,  B41J2/14072 ,  B41J2/14112 ,  B41J2/14153 ,  B41J2/155 ,  B41J2/17546 ,  B41J2002/14491 ,  B41J2202/13 ,  B41J2202/19 ,  B41J2202/20

Abstract: A wide array printhead module includes a plurality of printhead die. Each of the printhead die includes a number of sensors to measure properties of a number of elements associated with the printhead die. The wide array printhead module further includes an application specific integrated circuit (ASIC) to command and control each of the printhead die. The ASIC is located off any of the printhead die.

公开(公告)号：US11292264B2

公开(公告)日：2022-04-05

申请号：US16769042

申请日：2019-04-05

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

Inventor： Daryl E Anderson ,  James Michael Gardner

IPC: B41J2/175

Abstract: A print material level sensor includes a series of print material level sensing devices disposed at intervals to detect the presence of 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 and to output a signal based on the heat sensed. The print material level sensor includes control circuitry to enable supply of electrical power to the heater of any one of the print material level sensing devices in its depth zone and to receive the signal from the respective sensor. The control circuitry includes a comparator to compare a value of the signal to a target value. The control circuitry disables supply of the electrical power to the heater when the value of the signal is at least equal to the target value.

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：US20210129532A1

公开(公告)日：2021-05-06

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 ,  B41J2/14 ,  G01L5/1627

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：US10807360B2

公开(公告)日：2020-10-20

申请号：US16331862

申请日：2016-12-14

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

Inventor： Daryl E Anderson ,  Eric Martin ,  James Gardner

IPC: B41J2/045 ,  B41J2/14 ,  B41J2/125

Abstract: Examples include a fluid ejection die. Examples comprise an array of nozzles, where each respective nozzle includes a respective fluid ejector. Examples further include at least one die sensor. Furthermore, the examples include signal control logic to suppress transmission of a first set of signals for the fluid ejection die during sensing of die characteristics with the at least one die sensor.

公开(公告)号：US10759163B2

公开(公告)日：2020-09-01

申请号：US15516390

申请日：2014-10-27

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

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

IPC: B41J2/045 ,  B41J2/14 ,  B41J29/38 ,  B41J29/393 ,  H02J9/06

Abstract: A method of operating a printing device during a power loss event includes, with a power loss protection supply voltage generator coupled to a printhead driving circuit, maintaining a power loss protection supply voltage (VDD_plp) to the printhead driving circuit until a high voltage power supply (VPP) to the high voltage devices drops below a threshold voltage.

公开(公告)号：US20200164640A1

公开(公告)日：2020-05-28

申请号：US16619172

申请日：2017-07-18

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

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

IPC: B41J2/045

Abstract: A die includes a plurality of fluid actuation devices and at least one strain gauge sensor to sense strain. The die also includes at least one temperature sensor to sense the temperature of the die to compensate for a temperature component of the sensed strain.