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公开(公告)号：US20210362492A1
公开(公告)日：2021-11-25
申请号：US17058692
申请日：2018-11-16
Applicant: Hewlett-Packard Development Company, L.P.
Inventor： James Michael Gardner , Daryl E. Anderson , Eric Thomas Martin , Rogelio Cicili
Abstract: Examples of a fluidic die for temperature sensing are described herein. In some examples, a fluidic die may include a plurality of thermal sense modules. In some examples, each of the thermal sense modules includes a diode connected between a first switch and a second switch. In some examples, the fluidic die includes a differential amplifier to output a temperature voltage signal. In some examples, a first input of the differential amplifier is connected to the first switch of each of the thermal sense modules and a second input of the differential amplifier is connected to the second switch of each of the thermal sense modules.
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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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公开(公告)号：US20210170749A1
公开(公告)日：2021-06-10
申请号：US16763242
申请日：2017-12-11
Applicant: Hewlett-Packard Development Company, L.P.
Inventor： Daryl E. Anderson , Eric Martin , James Michael Gardner , Jordan Morris
Abstract: A fluid ejection system may include a fluidic die comprising at least one fluid ejection device, at least one electrical impedance sensor to detect at least one impedance value during a plurality of stages of existence of a drive bubble in at least one firing chamber associated with the at least one fluid ejection device, and a service station wherein, based on the impedance values detected, the printing system services the at least one fluid actuator.
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公开(公告)号：US10960658B2
公开(公告)日：2021-03-30
申请号：US16094448
申请日：2016-07-11
Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.
Inventor： Daryl E. Anderson , James Michael Gardner , Michael W. Cumbie , Scott A. Linn , Berkeley Fisher
Abstract: A method of detecting a level of printable fluid in a container includes, with at least one sensing location on a die in thermal contact with the printable fluid in the container, sensing a voltage of a capacitor over time as current from the capacitor leaks through a field effect transistor (FET). The FET and capacitor are associated with the sensing location. The method may further include, based on the voltage of the capacitor over time and a threshold voltage, determining whether the printable fluid is present at the at least one sensing location.
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公开(公告)号：US10933648B2
公开(公告)日：2021-03-02
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
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.
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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：US20190118527A1
公开(公告)日：2019-04-25
申请号：US16094448
申请日：2016-07-11
Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.
Inventor： Daryl E. Anderson , James Michael Gardner , Michael W. Cumbie , Scott A. Linn , Berkeley Fisher
Abstract: A method of detecting a level of printable fluid in a container includes, with at least one sensing location on a die in thermal contact with the printable fluid in the container, sensing a voltage of a capacitor over time as current from the capacitor leaks through a field effect transistor (FET). The FET and capacitor are associated with the sensing location. The method may further include, based on the voltage of the capacitor over time and a threshold voltage, determining whether the printable fluid is present at the at least one sensing location.
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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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