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公开(公告)号：US20220001667A1
公开(公告)日：2022-01-06
申请号：US16500421
申请日：2018-04-06
Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.
Inventor： Daryl E. Anderson , Eric T. Martin
Abstract: In some examples, a fluid dispensing device includes a plurality of fluidic actuators and a decoder to detect that a first fluidic actuator is to be activated, and detect that a sense measurement is to be performed. In response to detecting that the first fluidic actuator is to be activated and the sense measurement is to be performed, the decoder is to suppress activation of the first fluidic actuator at a first time, and activate the first fluidic actuator at a second time corresponding to a sense measurement interval to perform the sense measurement of the first fluidic actuator.
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公开(公告)号：US20210229427A1
公开(公告)日：2021-07-29
申请号：US17052923
申请日：2018-07-02
Applicant: Hewlett-Packard Development Company, L.P.
Inventor： Vincent C. Korthuis , Rodrigo N. Henriquez , Eric T. Martin
IPC: B41J2/045
Abstract: A fluidic die includes primitives arranged to form a number of primitive zones, each primitive zone including a memory to store adjustment data, and at least one signal adjuster to receive a fire signal, and to adjust the received fire signal based on the stored adjustment data to provide an adjusted fire signal to each primitive of the primitive zone. The fluidic die includes an address bus and a set of data lines, each data line corresponding to a different one of the primitives. Mode circuitry directs address data from the address bus to each primitive and print data from each data line to the corresponding primitive when a mode signal has a first value, and directs data representing adjustment data from one of the address bus and the set of data lines to at least one of the memories when the mode signal has a second value.
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公开(公告)号：US11065867B2
公开(公告)日：2021-07-20
申请号：US16661103
申请日：2019-10-23
Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.
Inventor： Eric T. Martin , Andrew L. Van Brocklin , David Maxfield
Abstract: Measuring an inkjet nozzle may include taking at least one impedance measurement after the firing command is sent to detect the presence of a drive bubble and taking another impedance measurement to detect a collapse of the drive bubble.
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公开(公告)号：US20210215576A1
公开(公告)日：2021-07-15
申请号：US17047711
申请日：2018-06-30
Applicant: Hewlett-Packard Development Company, L.P.
Inventor： Eric T. Martin , Rogelio Cicili , James Michael Gardner
Abstract: Examples include a fluidic die. The fluidic die comprises a plurality of fluid actuators arranged in respective sets of fluid actuators. The fluidic die further includes a plurality of fluidic sensors, where the fluidic sensors are arranged in respective sets, and each respective fluidic sensor is disposed proximate a respective fluid actuator. The fluidic die further comprises a plurality of current sources including a respective current source for each respective set of fluidic sensors. Furthermore, the fluidic die comprises a fluidic sensor test node. For each respective set of fluidic sensors, the fluidic die comprises respective fluidic sensor test logic, where the respective fluidic sensor test logic for each respective set of fluidic sensors is coupled between the respective current source and the fluidic sensor test node to selectively connect each respective current source to the fluidic sensor test node.
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公开(公告)号：US11037036B2
公开(公告)日：2021-06-15
申请号：US16486119
申请日：2017-04-14
Applicant: Hewlett-Packard Development Company, L.P.
Inventor： Daryl E. Anderson , Eric T. Martin , James R. Przybyla
Abstract: Examples include a fluidic die. The fluidic die may comprise an array of fluid actuators, an actuation data register, a mask register, and actuation logic. The actuation data register may store actuation data that indicates fluid ejectors to actuate for a set of actuation events. The mask register may store mask data that indicates a set of fluid actuators enabled for actuation for a respective actuation event of the set of actuation events. The actuation logic may electrically actuate a subset of the fluid actuators based at least in part on the actuation data register and the mask register for the respective actuation event.
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Patent Agency Ranking
公开(公告)号：US10532560B2
公开(公告)日：2020-01-14
申请号：US16140284
申请日：2018-09-24
Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.
Inventor： Daryl E. Anderson , Eric T. Martin , Peter James Fricke , James Michael Gardner
Abstract: In some examples, a fluid die includes a fluid nozzle, a first latch, a second latch, and a timing circuit comprising a counter and a comparator. The timing circuit is to trigger the first latch, at a first predetermined time instant from an edge of a firing pulse, to store a first test result obtained based on a voltage measured across the fluid nozzle, and trigger the second latch, at a second predetermined time instant from the edge of the firing pulse, to store a second test result obtained based on a voltage measured across the fluid nozzle.
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公开(公告)号：US10173417B2
公开(公告)日：2019-01-08
申请号：US15696398
申请日：2017-09-06
Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.
Inventor： Daryl E. Anderson , Eric T. Martin
Abstract: In some examples, a print head includes a plurality of nozzles, a test result register to store a drive bubble detect (DBD) test result for a first nozzle of the plurality of nozzles, and a result-ready register to store a status indication set to a predetermined value provided responsive to storing of the DBD test result in the test result register, where the test result register and the result-ready register are accessible by a control unit outside the print head to evaluate a nozzle condition based on the DBD test result in the test result register.
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公开(公告)号：US10112425B2
公开(公告)日：2018-10-30
申请号：US15822325
申请日：2017-11-27
Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.
Inventor： Daryl E. Anderson , Huston W. Rice , Eric T. Martin
Abstract: A fluid ejection device includes a plurality of analog devices, and a storage element storing an authentication value based on electrical characteristics of a subset of the plurality of analog devices.
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公开(公告)号：US10046559B2
公开(公告)日：2018-08-14
申请号：US15893268
申请日：2018-02-09
Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.
Inventor： Daryl E. Anderson , Eric T. Martin , Peter James Fricke , James Michael Gardner
CPC classification number: B41J2/0451 , B41J2/04541 , B41J2/0458 , B41J2/14153 , B41J2/16579 , B41J2/2142
Abstract: In some examples, a printhead die includes a nozzle to be fired by a fire pulse, and a sensor to measure, during a firing of the nozzle by the fire pulse, a measured signal comprising an impedance characteristic of a fluid sample of the nozzle, in response to an input signal applied to the fluid sample. A comparator is to compare the measured signal to a reference value, and a counter is to count over an evaluation interval in response to the comparing indicating that an evaluation criterion is satisfied, and the counter is to stop counting in response to the comparing indicating that the evaluation criterion is not satisfied, a count value of the counter providing an indicator of nozzle chamber operation corresponding to the measured signal.
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公开(公告)号：US20180170034A1
公开(公告)日：2018-06-21
申请号：US15896546
申请日：2018-02-14
Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.
Inventor： Daryl E. Anderson , Eric T. Martin
CPC classification number: B41J2/0451 , B41J2/04541 , B41J2/04555 , B41J2/0458 , B41J2/14153 , B41J2/16579 , B41J2/2142 , B41J2002/14354
Abstract: In some examples, a print head comprises a plurality of nozzles comprising respective heaters on the print head, each heater of the heaters to be driven by a respective firing pulse to form a bubble in a corresponding nozzle. The print head further comprises a first time repository on the print head to store a first time instant, and a second time repository on the print head to store a second time instant, and a plurality of detect circuits provided onto the print head and coupled to corresponding nozzles of the plurality of nozzles, wherein each respective detect circuit of the plurality of detect circuits is to detect a change in respective impedances for a respective nozzle at the first time instant and the second time instant.
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