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公开(公告)号：US20210237058A1
公开(公告)日：2021-08-05
申请号：US17049287
申请日：2018-08-09
Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.
Inventor： James Michael Gardner , Daryl E. Anderson , Eric Martin , Alexander Govyadinov
Abstract: A microfluidic device may include an impedance sensor located within a fluidic priming orifice within a fluidic channel of the microfluidic device, and control logic. The control logic is to force a current into the impedance sensor to sense the presence of a fluid within the fluidic channel at the locations of the impedance sensor, and determine if the fluid is primed into the fluidic channel based on the impedance values sensed by the impedance sensor.
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公开(公告)号：US11040530B2
公开(公告)日：2021-06-22
申请号：US16763032
申请日：2018-01-24
Applicant: Hewlett-Packard Development Company, L.P.
Inventor： Daryl E. Anderson , James A. Feinn , Eric Martin , James Michael Gardner
Abstract: In one example in accordance with the present disclosure, a fluidic system is described. The fluidic system includes a fluidic die. The fluidic die includes a substrate in which a number of fluid chambers are formed. Each fluid chamber includes a fluid actuator disposed within the fluid chamber. A number of actuator sensors are disposed on the substrate to output at least one value indicative of a sensed characteristic of fluid actuators. A number of substrate temperature sensors are also disposed on the substrate to sense a temperature for the substrate. An actuator evaluation device of the fluidic system determines a state of the fluid actuator based at least in part on the at least one value and at least one correction value associated with the temperature sensed by the number of substrate temperature sensors.
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公开(公告)号：US20210178756A1
公开(公告)日：2021-06-17
申请号：US16760918
申请日：2017-11-22
Applicant: Hewlett-Packard Development Company, L.P.
Inventor： Daryl E. Anderson , Eric Martin , James Michael Gardner
IPC: B41J2/045
Abstract: A fluidic die may include at least two zones, a reference temperature sensor communicatively coupled to each zone, a calibration voltage generator coupled between the zones and the reference temperature sensor, and a calibration loop circuit associated with each zone to calibrate each zone based on a voltage provided by the reference temperature sensor.
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公开(公告)号：US20210010967A1
公开(公告)日：2021-01-14
申请号：US16766633
申请日：2018-01-24
Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.
Inventor： Eric Martin , Daryl E. Anderson , James Michael Gardner , James A. Feinn , Kevin Kaufmann
Abstract: In one example in accordance with the present disclosure, a fluid analysis system is described. The fluid analysis system includes a fluidic die. The fluidic die includes a fluid chamber to hold a volume of fluid to be analyzed and an impedance sensor disposed within the fluid chamber. The impedance sensor measures an impedance of the fluid in the fluid chamber. The fluid analysis system also includes an evaluator device electrically coupled to the impedance sensor. The evaluator device determines at least one property of the fluid based on the impedance.
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公开(公告)号：US20200316937A1
公开(公告)日：2020-10-08
申请号：US16763246
申请日：2017-12-15
Applicant: Hewlett-Packard Development Company, L.P.
Inventor： James Michael Gardner , Daryl E. Anderson , Eric Martin
IPC: B41J2/045
Abstract: A fluidic die that includes at least one temperature sensor coupled to at least one zone of the fiuidic die, a setpoint register to receive a target temperature setpoint for the fiuidic die wherein a detected temperature presented by the at least one temperature sensor is compared to the target temperature setpoint using a comparator module to get a firing pulse adjustment value, and a firing pulse used to convey an amount of fluid within the die is adjusted using the firing pulse adjustment value.
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Patent Agency Ranking
公开(公告)号：US20200307233A1
公开(公告)日：2020-10-01
申请号：US16753415
申请日：2017-10-18
Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.
Inventor： Daryl E. Anderson , James Michael Gardner
IPC: B41J2/175
Abstract: It is disclosed a printing agent container having ink an authenticity detection mechanisms comprising: a receptacle having a top wall a bottom wall opposing such top wall and a sidewall between such top wall and such bottom wall; an internal volume defined by such receptacle that contains a printing agent, and a vibration transducer on one of the side walls, wherein the container is to be mechanically coupled to a carriage so that the printing fluid is disposed on the bottom surface, being the vibration transducer to detect a vibration signal induced by the carriage and wherein the container comprises a communication channel to a controller being the controller to receive through the communication channel a container signature from the vibration transducer and to identify a container identification signal associated to the container signature.
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公开(公告)号：US10369785B2
公开(公告)日：2019-08-06
申请号：US15793778
申请日：2017-10-25
Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.
Inventor： Andrew L. Van Brocklin , Adam L. Ghozeil , Daryl E. Anderson
Abstract: An inkjet printhead device, fluid ejection device and method thereof are disclosed. The fluid ejection device includes a fluid supply chamber to store fluid, an ejection chamber including a nozzle and a corresponding ejection member to selectively eject the fluid through the nozzle, and a channel to establish fluid communication between the fluid supply chamber and the ejection chamber. The fluid ejection device also includes a pressure sensor unit having a sensor plate to output a voltage value corresponding to a cross-sectional area of an amount of fluid in the at least ejection chamber.
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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
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.
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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
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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公开(公告)号：US10220609B2
公开(公告)日：2019-03-05
申请号：US15684465
申请日：2017-08-23
Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.
Inventor： Daryl E. Anderson , Eric T. Martin , Peter James Fricke
Abstract: In an example, a print head comprises a nozzle to be activated by a delayed fire pulse that is delayed from an initial fire pulse, a sensor to measure an impedance of the nozzle, and a detector to determine a first time instant following the delayed fire pulse for registering a first impedance measurement by the sensor.
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