公开(公告)号：US20220396070A1

公开(公告)日：2022-12-15

申请号：US17772773

申请日：2019-11-20

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

Inventor： Eric T. Martin ,  Berkeley Fisher

IPC: B41J2/045

Abstract: An example input voltage agnostic fluidic device may include a level shifter to adjust an input voltage of control signals received at an input interconnect to a voltage level that is within operational thresholds of on-chip devices of the input voltage agnostic fluidic device. A clamp circuit may be provided to clamp circuitry downstream of the level shifter below the operational threshold of the on-chip device.

公开(公告)号：US20210078320A1

公开(公告)日：2021-03-18

申请号：US17105195

申请日：2020-11-25

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

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

IPC: B41J2/045 ,  B41J29/393 ,  G01L1/22 ,  G01L1/18 ,  B41J2/14

Abstract: A die may include a plurality of fluid pumps, at least one strain gauge sensor to sense a strain in the die, and at least one temperature sensor to sense the temperature of the die to compensate for a temperature component of the sensed strain.

公开(公告)号：US20190137316A1

公开(公告)日：2019-05-09

申请号：US16094121

申请日：2016-04-29

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

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

IPC: G01F23/24 ,  B41J2/175

Abstract: An example printing cartridge includes a fluid container, a sensing die including a plurality of sensing locations in thermal contact with the fluid container, and a voltage comparator to output time-based information by comparing a sensed voltage generated at a selected sensing location of the plurality of sensing locations to a threshold voltage, the time-based information representative of whether a fluid is present at the sensing location.

公开(公告)号：US20190111695A1

公开(公告)日：2019-04-18

申请号：US16094101

申请日：2016-04-29

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

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

IPC: B41J2/175 ,  G01F23/24

Abstract: An example printing cartridge includes a fluid container, a plurality of sensing locations in thermal contact with the fluid container, a voltage comparator to output time-based information based on a comparison of a sensed voltage generated at a selected sensing location of the plurality of sensing locations to a threshold voltage, the time-based information representative of whether a fluid is present at a fluid level associated with the selected sensing location, and a counter to convert the time-based information to a digital code based on a number of clock cycles.

公开(公告)号：US11135840B2

公开(公告)日：2021-10-05

申请号：US16490838

申请日：2017-04-24

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

Inventor： James Gardner ,  Berkeley Fisher ,  Andrew Koll

IPC: B41J2/14

Abstract: A fluid ejection system includes a fluid ejection die and a controller. The fluid ejection die includes a plurality of nozzles to eject fluid drops and a plurality of strain gauge sensors to sense strain within the fluid ejection die. The controller is to receive the sensed strain from each strain gauge sensor to determine a status of the fluid ejection die.

公开(公告)号：US20200033203A1

公开(公告)日：2020-01-30

申请号：US16490975

申请日：2017-04-24

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

Inventor： Daryl E Anderson ,  James Gardner ,  Berkeley Fisher

IPC: G01L1/16 ,  B41J2/045 ,  B41J2/165

Abstract: A fluid ejection die includes a plurality of nozzles to eject fluid drops and a plurality of strain gauge sensors to sense strain. Each strain gauge sensor corresponds to a nozzle and passes the sensed strain to a controller to determine the health of the nozzle based on the sensed strain.

公开(公告)号：US20200031127A1

公开(公告)日：2020-01-30

申请号：US16490838

申请日：2017-04-24

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

Inventor： James Gardner ,  Berkeley Fisher ,  Andrew Koll

IPC: B41J2/14

Abstract: A fluid ejection system includes a fluid ejection die and a controller. The fluid ejection die includes a plurality of nozzles to eject fluid drops and a plurality of strain gauge sensors to sense strain within the fluid ejection die. The controller is to receive the sensed strain from each strain gauge sensor to determine a status of the fluid ejection die.

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.

公开(公告)号：US20190111696A1

公开(公告)日：2019-04-18

申请号：US16094113

申请日：2016-04-29

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

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

IPC: B41J2/175

Abstract: An example printing cartridge includes a sensing die including a plurality of sensing locations in thermal contact with a fluid container, an on-die controller to select a sensing location of the plurality of sensing locations to activate and to provide a variable threshold voltage, and a voltage comparator to compare a sensed voltage generated at a selected sensing location to the variable threshold voltage, and output time-based information based on the comparison, the time-based information representative of whether a fluid is present at a fluid level associated with the selected sensing location.

公开(公告)号：US20230027185A1

公开(公告)日：2023-01-26

申请号：US17777606

申请日：2019-11-20

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

Inventor： Eric T. Martin ,  Berkeley Fisher

IPC: B41J2/045

Abstract: An example input voltage agnostic fluidic device may include a level shifter to adjust an input voltage of control signals received at an input interconnect to a voltage level that is within operational thresholds of on-chip devices of the input voltage agnostic fluidic device.