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.

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：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：US10926535B2

公开(公告)日：2021-02-23

申请号：US16618940

申请日：2017-07-12

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

Inventor： Scott A Linn ,  Vincent C Korthuis ,  James M Gardner

IPC: B41J2/045

Abstract: A fluidic die may include a fluid actuator comprising an electrical resistor, a power node to supply electrical current to the resistor to drive the fluid actuator, a low side switch transistor connected to a ground node and having a gate to control the flow of electrical current through the resistor, a voltage regulator to receive electrical power from the power node and to output a predetermined voltage and a level shifter to control to output a low side switch transistor gate drive voltage using the predetermined voltage and based upon control signals to control the gate to control fluid displacement by the fluid actuator. The predetermined voltage is greater than a voltage of the control signals and is independent of a resistance of the ground node.