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Небесная энциклопедия

Космические корабли и станции, автоматические КА и методы их проектирования, бортовые комплексы управления, системы и средства жизнеобеспечения, особенности технологии производства ракетно-космических систем

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Мониторинг СМИ

Мониторинг СМИ и социальных сетей. Сканирование интернета, новостных сайтов, специализированных контентных площадок на базе мессенджеров. Гибкие настройки фильтров и первоначальных источников.

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Применить Всего найдено 286. Отображено 100.
16-02-2017 дата публикации

EVALUATING PRINT HEAD NOZZLE CONDITION

Номер: US20170043572A1
Автор: Daryl E. ANDERSON, Eric T. Martin, ANDERSON DARYL E, MARTIN ERIC T, ANDERSON Daryl E., Martin Eric T.
Принадлежит: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.

The present subject matter relates to evaluating print head nozzle condition of a plurality of nozzle columns. Each of the plurality of nozzle columns comprises a set of nozzles. A plurality of drive bubble detect modules are activated, by a timing circuit coupled to each of the plurality of nozzle columns upon occurrence of at least a first predetermined time instant and a second predetermined time instant. For each of the plurality of nozzle columns, test results for a nozzle of the nozzle column are registered by the corresponding drive bubble detect module. Test results obtained based on impedances measured across a nozzle associated with the nozzle column corresponding to a drive bubble detect module are registered by the drive bubble detect module at the first predetermined time instant and the second predetermined time instant. The print head nozzle condition of the nozzle is evaluated based on the test results.

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Номер записи: 1
06-01-2022 дата публикации

DECODERS TO ACTIVATE FLUIDIC ACTUATORS FOR SENSE MEASUREMENTS

Номер: US20220001667A1
Автор: ANDERSON Daryl E., Martin Eric T.
Принадлежит:

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. 1. A fluid dispensing device comprising:a plurality of fluidic actuators; and detect that a first fluidic actuator is to be activated;', 'detect that a sense measurement is to be performed; and', 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., 'in response to detecting that the first fluidic actuator is to be activated and the sense measurement is to be performed], 'a decoder to2. The fluid dispensing device of claim 1 , wherein the detecting that the sense measurement is to be performed comprises detecting that a sense measurement indicator is set active specifying that the sense measurement is to be performed for the first fluidic actuator.3. The fluid dispensing device of claim 1 , wherein the detecting that the sense measurement is to be performed comprises detecting that a sense measurement indicator is set active specifying that the sense measurement is to be performed for a fluidic actuator of a group of fluidic actuators including the first fluidic actuator.4. The fluid dispensing device of claim 3 , wherein the group of fluidic actuators are associated with respective activation intervals associated with respective different addresses claim 3 , and wherein the suppressing of the activation of ...

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Номер записи: 2
05-01-2017 дата публикации

EVALUATING PRINT NOZZLE CONDITION

Номер: US20170001433A1
Автор: ANDERSON Daryl E., Fricke Peter James, Gardner James Michael, Martin Eric T.
Принадлежит: Hewlett-Packard Development Company, L.P.

Systems and methods for evaluating the condition of a print nozzle are described. In one example, impedances across the print nozzle are measured. Subsequently, first test result and second test result are determined and registered at a first predetermined time instant and at a second predetermined time instant, respectively. The first test result and the second test result are obtained based on the measured impedances. Based on the first test result and the second test result, the condition of the print nozzle, is determined. 1. A method for evaluating the condition of a print nozzle , the method comprising:measuring impedances across the print nozzle;registering onto a print the circuitry of the print nozzle, at least at a first predetermined time instant and at a second predetermined time instant, a first test result and a second test result, respectively, obtained based on the measured impedances, wherein each of the first predetermined time instant and the second predetermined time instant are measured with respect to a firing pulse;evaluating the condition of the print nozzle based on the first test result and the second test result.2. The method as claimed in claim 1 , wherein the first test result is obtained by comparing a voltage corresponding to the impedance measured at the first predetermined time instant with a threshold voltage.3. The method as claimed in claim 2 , wherein the second test result is obtained by comparing a voltage corresponding to the impedance measured at the second predetermined time instant with the threshold voltage4. The method as claimed in claim 1 , wherein the first test result and the second test result are in the form of a logical output.5. The method as claimed in claim 1 , wherein:the first test result is indicative of whether a drive bubble persisted at the first predetermined time instant; andthe second test result is indicative of whether the drive bubble collapsed and ink within an ink chamber associated with the print ...

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Номер записи: 3
04-01-2018 дата публикации

CRACK SENSING FOR PRINTHEAD HAVING MULTIPLE PRINTHEAD DIE

Номер: US20180001618A1
Автор: Anderson Daryl E, Corrigan George H, Linn Scott A
Принадлежит: Hewlett-Packard Development Company, L.P.

An inkjet printhead including a plurality of printhead dies, each printhead die including at least one crack sense resistor, at least one analog bus connected to each printhead die, and a controller separate from the plurality of printhead dies. The controller is configured to provide a known current to the at least one crack sense resistor of each printhead die in a selectable pattern via the at least one analog bus and to determine whether the printhead dies are cracked based on resulting voltages produced on the at least one analog bus. 1. An inkjet printhead comprising:a plurality of printhead dies, each printhead die including at least one crack sense resistor;at least one analog bus connected to each printhead die; anda controller, separate from the plurality of printhead dies, configured to provide a known current to the at least one crack sense resistor of each printhead die in a selectable pattern via the at least one analog bus and to determine whether the printhead dies are cracked based on resulting voltages produced on the at least one analog bus.2. The printhead of claim 1 , where the at least one crack sense resistor comprises a wire.3. The printhead of claim 1 , wherein the at least one crack sense resistor includes at least one crack resistor disposed about a perimeter of the printhead die.4. The printhead of claim 1 , where the at least one crack sense resistor includes at least one of a crack sense resistor disposed at each corner of at least one ink slot on the printhead and a crack sense resistor disposed about a perimeter of the at least one ink slot.5. The printhead of claim 1 , wherein each printhead die includes multiple crack sense resistors disposed at different locations on the printhead die.6. The printhead die of claim 1 , wherein to determine whether the printhead dies are cracked claim 1 , the controller is configured to compare the resulting voltages on the at least one analog bus to predetermined voltages.7. The printhead of claim 1 ...

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Номер записи: 4
13-01-2022 дата публикации

PRINT MATERIAL LEVEL SENSING

Номер: US20220009243A1
Автор: Anderson Daryl E, Dagg Evan Clay, Gardner James Michael
Принадлежит:

A print material level sensor comprises a series of print material level sensing devices disposed at intervals to detect presence of a print material at successive depth zones in a container, wherein each print material level sensing device includes a heater to emit heat at its depth zone and a sensor to sense heat at the depth zone and to output a signal based on the heat sensed. The sensor has control circuitry to, for each print material level sensing device to be calibrated, turn on the heater for an initial time duration set by an initial heat count and iteratively adjust the time duration for which the heater is turned on in accordance with an adjusted heat count, until the signal output from the sensor indicates that a target value has been reached in that depth zone. 1. A print material level sensor comprising:a series of print material level sensing devices disposed at intervals to detect a presence of a print material at successive depth zones in a container, wherein each print material level sensing device includes a heater to emit heat at its depth zone and a sensor to sense heat at the depth zone and to output a signal based on the heat sensed; andcontrol circuitry to, for each print material level sensing device to be calibrated, turn on the heater for an initial time duration set by an initial heat count and iteratively adjust the time duration for which the heater is turned on in accordance with an adjusted heat count, until the signal output from the sensor indicates that a target value has been reached in that depth zone.2. The print material level sensor of claim 1 , the control circuitry having a heat pulse generator to receive the initial heat count and to output a heat pulse to turn on the heater for the initial time duration in accordance with the initial heat count.3. The print material level sensor of claim 2 , the heat pulse generator to receive the adjusted heat count and to output a heat pulse to turn on the heater for an adjusted time ...

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Номер записи: 5
14-01-2021 дата публикации

FLUIDIC PROPERTY DETERMINATION FROM FLUID IMPEDANCES

Номер: US20210010967A1
Автор: ANDERSON Daryl E., Feinn James A., Gardner James Michael, Kaufmann Kevin, Martin Eric
Принадлежит: Hewlett-Packard Development Company, L.P.

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. 1. A fluid analysis system , comprising: a fluid chamber to hold a volume of fluid to be analyzed; and', 'an impedance sensor disposed within the fluid chamber to measure an impedance of the fluid in the fluid chamber; and, 'a fluidic die comprisingan evaluator device electrically coupled to the impedance sensor to determine at least one property of the fluid based on the impedance.2. The fluid analysis system of claim 1 , further comprising an electrical stimulus source to supply an electrical stimulus to the impedance sensor disposed in the fluid chamber.3. The fluid analysis system of claim 2 , wherein:the electrical stimulus source is a current source to force different currents on the impedance sensor based on a component to be determined; andan output of the impedance sensor is a voltage which is based on the component to be determined and a forced current.4. The fluid analysis system of claim 2 , wherein:the electrical stimulus source is a voltage source that applies different voltages on the impedance sensor based on a component to be determined; andan output of the impedance sensor is a current which is based on the component to be determined and an applied voltage.5. The fluid analysis system of claim 1 , further comprising a database comprising a mapping between real and imaginary components of impedance and the at least one fluid property.6. The fluid analysis system of claim 1 , wherein the evaluator ...

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Номер записи: 6
16-01-2020 дата публикации

ON-DIE ACTUATOR EVALUATION

Номер: US20200016888A1
Автор: Anderson Daryl E, Gardner James Michael, Martin Eric
Принадлежит: Hewlett-Packard Development Company, L.P.

In one example in accordance with the present disclosure, a fluid ejection die is described. The die includes a number of actuators to manipulate fluid. The actuators are disposed on the fluid ejection die and are grouped as primitives on the fluid ejection die. The fluid ejection die also includes a number of actuators sensors disposed on the fluid ejection die. The nozzle sensors receive a sense voltage indicative of a state of corresponding actuators. Each actuator sensor is coupled to a respective actuator. The fluid ejection die also includes an actuator evaluation device per primitive, which actuator evaluation device is disposed on the fluid ejection die. The actuator evaluation device evaluates an actuator characteristic of any actuator within the primitive and generates an output indicative of a failing actuator of the fluid ejection die. 1. A fluid ejection die comprising: are disposed on the fluid ejection die; and', 'are grouped as primitives on the fluid ejection die;, 'a number of actuators to manipulate fluid, wherein the number of actuatorsa number of actuator sensors disposed on the fluid ejection die to receive a sense voltage indicative of a state of a corresponding actuator, wherein each actuator sensor is coupled to a respective actuator; evaluate an actuator characteristic of any actuator within the primitive; and', 'generate an output indicative of a failing actuator of the fluid ejection die., 'an actuator evaluation device per primitive disposed on the fluid ejection die to2. The fluid ejection die of claim 1 , wherein:each actuator sensor is uniquely paired with a corresponding actuator; anda single actuator evaluation device is shared among all the actuators in the primitive3. The fluid ejection die of claim 1 , wherein the actuator evaluation device comprises:a compare device to compare a voltage output from one of the number of actuator sensors against a threshold voltage to determine when a corresponding actuator is malfunctioning; anda ...

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Номер записи: 7
21-01-2021 дата публикации

SENSE MEASUREMENTS FOR FLUIDIC ACTUATORS

Номер: US20210016565A1
Автор: ANDERSON Daryl E., Martin Eric T., Przybyla James R.
Принадлежит: Hewlett-Packard Development Company, L.P.

In some examples, a system includes a device support to receive a fluid dispensing device, and a controller to identify, based on data controlling activation of fluidic actuators, a fluidic actuator that is to be activated in a first activation cycle of a group of activation cycles that correspond to activation intervals of respective fluidic actuators of a group of fluidic actuators of the fluid dispensing device, the identified fluidic actuator being part of the group of fluidic actuators. To perform a sense measurement for the identified fluidic actuator, the controller suppresses activation of the identified fluidic actuator in the first activation cycle, and causes activation of the identified fluidic actuator in a sense measurement cycle different from the first activation cycle, the sense measurement cycle being part of the group of activation cycles. 1. A system comprising:a device support to receive a fluid dispensing device; and identify, based on data controlling activation of fluidic actuators, a fluidic actuator that is to be activated in a first activation cycle of a group of activation cycles that correspond to activation intervals of respective fluidic actuators of a group of fluidic actuators of the fluid dispensing device, the identified fluidic actuator being part of the group of fluidic actuators, and', suppress activation of the identified fluidic actuator in the first activation cycle, and', 'cause activation of the identified fluidic actuator in a sense measurement cycle different from the first activation cycle, the sense measurement cycle being part of the group of activation cycles., 'to perform a sense measurement for the identified fluidic actuator], 'a controller to2. The system of claim 1 , wherein the data comprises image data that schedules activation of the identified fluidic actuator in the first activation cycle to perform a print operation.3. The system of claim 1 , wherein the data controls activation of selected fluidic ...

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Номер записи: 8
21-01-2021 дата публикации

FLUIDIC ACTUATOR ACTIVATIONS FOR SENSE MEASUREMENTS

Номер: US20210016566A1
Автор: ANDERSON Daryl E., Martin Eric T.
Принадлежит: Hewlett-Packard Development Company, L.P.

In some examples, a fluid dispensing device includes a plurality of fluidic actuators, activate data storage elements, and sense measurement storage elements. The fluid dispensing device includes a decoder to detect, based on a first activate indicator of the activate indicators, that a first fluidic actuator is to be activated, detect, based on a first sense measurement indicator of the sense measurement indicators that a sense measurement is to be performed on the first fluidic actuator, and in response to detecting that the first fluidic actuator is to be activated and the sense measurement is to be performed on the first fluidic actuator, 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. 1. A fluid dispensing device comprising:a plurality of fluidic actuators;activate data storage elements to store respective activate indicators for controlling activation of respective fluidic actuators of the plurality of fluidic actuators;sense measurement storage elements to store respective sense measurement indicators for indicating whether the respective fluidic actuators are to be subject to a sense measurement; and detect, based on a first activate indicator of the activate indicators, that a first fluidic actuator is to be activated;', 'detect, based on a first sense measurement indicator of the sense measurement indicators that a sense measurement is to be performed on the first fluidic actuator; and', 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., 'in response to detecting that the first fluidic actuator is to be activated and the sense measurement is to be performed on the first fluidic actuator], ' ...

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Номер записи: 9
10-02-2022 дата публикации

TEMPERATURE MONITORING OF FLUIDIC DIE ZONES

Номер: US20220040973A1
Автор: Anderson Daryl E, Martin Eric
Принадлежит: Hewlett-Packard Development Company, L.P.

A temperature monitoring circuit for a fluidic die, the temperature monitoring circuit including input logic to receive a series of zone temperature values, each zone temperature value corresponding to a different zone of the fluidic die, and evaluation logic. For each zone temperature value, the evaluation logic to replace a current minimum temperature value with the zone temperature value if the zone temperature value is less than the current minimum temperature value, and to replace a current maximum temperature value with the zone temperature value if the zone temperature value is greater than the current maximum temperature value. 1. A temperature monitoring circuit for a fluidic die , comprising:input logic to receive a series of zone temperature values, each zone temperature value corresponding to a different zone of the fluidic die; and replace a current minimum temperature value with the zone temperature value if the zone temperature value is less than the current minimum temperature value; and', 'replace a current maximum temperature value with the zone temperature value if the zone temperature value is greater than the current maximum temperature value., 'evaluation logic, for each zone temperature value, to2. The temperature monitoring circuit of claim 1 , prior to receiving the series of zone temperature values claim 1 , the evaluation logic to:set the current minimum temperature value to an initial minimum temperature value; andset the current maximum temperature value to an initial maximum temperature value.3. The temperature monitoring circuit of claim 2 , the initial minimum and maximum temperature values being a midpoint temperature of expected zone temperature values.4. The temperature monitoring circuit of claim 3 , the initial minimum value being a value greater than a designed operating temperature of the fluidic die claim 3 , and the initial maximum value being a value less than the designed operating temperature.5. The temperature monitoring ...

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Номер записи: 10
10-02-2022 дата публикации

FIRE PULSE CONTROL CIRCUIT HAVING PULSE WIDTH ADJUSTMENT RANGE

Номер: US20220040975A1
Автор: Anderson Daryl E, Martin Eric
Принадлежит: Hewlett-Packard Development Company, L.P.

A fire pulse control circuit for a fluidic die includes input logic to receive a series of zone temperatures, each corresponding to a different zone of the fluidic die, each zone having a corresponding fire pulse having a width corresponding to a pulse temperature, the width adjustable from a minimum width corresponding to a maximum pulse temperature to a maximum width corresponding to a minimum pulse temperature. For each zone temperature, adjustment logic outputs a zone adjustment signal to decrease the fire pulse width of the corresponding zone if the zone temperature is greater than the pulse temperature and the pulse temperature is less than the maximum pulse temperature, and outputs a zone adjustment signal to increase the fire pulse width of the corresponding zone if the zone temperature is less than the pulse temperature and the pulse temperature is greater than the minimum pulse temperature. 1. A fire pulse control circuit for a fluidic die , comprising:input logic to receive a series of zone temperatures, each zone temperature corresponding to a different zone of the fluidic die, each zone having a corresponding fire pulse having a width corresponding to a pulse temperature, the width adjustable from a minimum width corresponding to a maximum pulse temperature to a maximum width corresponding to a minimum pulse temperature; and output a zone adjustment signal to direct a decrease of the fire pulse width of the corresponding zone if the zone temperature is greater than the pulse temperature and the pulse temperature is less than the maximum pulse temperature; and', 'output a zone adjustment signal to direct an increase of the fire pulse width of the corresponding zone if the zone temperature is less than the pulse temperature and the pulse temperature is greater than the minimum pulse temperature., 'adjustment logic, for each zone temperature, to2. The fire pulse control circuit of claim 1 , the adjust logic claim 1 , for each zone temperature claim 1 , to ...

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Номер записи: 11
24-01-2019 дата публикации

NOZZLE CONDITION INDICATION

Номер: US20190023004A1
Автор: ANDERSON Daryl E., Fricke Peter James, Gardner James Michael, Martin Eric T.
Принадлежит:

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. 1. A print die comprising:a print nozzle;a first latch;a second latch;a timing circuit comprising a counter and a comparator,the timing circuit to trigger the first latch, at a first predetermined time instant from an edge of a firing pulse, to register a first test result obtained based on a voltage measured across the print nozzle, andthe timing circuit to trigger the second latch, at a second predetermined time instant from the edge of the firing pulse, to register a second test result obtained based on a voltage measured across the print nozzle, the second predetermined time instant different from the first predetermined time instant, and the firing pulse for activating the print nozzle.2. The print die of claim 1 , further comprising:a drive bubble detect module to evaluate a condition of the print nozzle based on the first test result and the second test result.3. The print die of claim 1 , wherein the comparator is to compare a value of the counter to a first time value in a first time repository to determine the first predetermined time instant claim 1 , and the comparator is to compare the value of the counter to a second time value in a second time repository to determine the second predetermined time instant.4. The print die of claim 3 , wherein the timing circuit further comprises a multiplexer to selectively connect the first time repository and the second time repository to the comparator.5. The print die of ...

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Номер записи: 12
24-01-2019 дата публикации

PRINTING APPARATUS AND METHODS FOR DETECTING FLUID LEVELS

Номер: US20190023020A1
Автор: ANDERSON Daryl E.
Принадлежит:

Printing apparatus and methods of detecting ink levels are disclosed in examples herein. An example printing cartridge includes a fluid container, a plurality of electrodes to detect fluid in the fluid container, and a shift register to capture fluid level information from the plurality of electrodes. 1. A printing cartridge comprising:a fluid container;a plurality of electrodes to detect fluid in the fluid container; anda shift register to capture fluid level information from the plurality of electrodes.2. The printing cartridge of claim 1 , wherein the shift register includes a plurality of sensing flops in circuit with respective electrodes.3. The printing cartridge of claim 2 , wherein the sensing flops store respective fluid level values when a voltage is provided to the shift register claim 2 , the fluid level values representative of whether fluid is detected by the corresponding electrodes.4. The printing cartridge of claim 2 , wherein the fluid container includes an electrical ground to bias a signal received at a sensing flop to a first value when an electrode associated with the sensing flop is in contact with fluid in the fluid container.5. The printing cartridge of claim 1 , further including an electrical interface to map the fluid level information to a measurement.6. The printing cartridge of claim 5 , wherein the electrical interface is to:generate a signal based on the measurement; andtransmit the signal to a printer.7. The printing cartridge of claim 1 , wherein the plurality of electrodes are positioned in the fluid container to correspond to a fluid level of the fluid container.8. A sensing die comprising:a plurality of sensing flops in electrical contact with a fluid container, each of the sensing flops associated with a position in the fluid container, the plurality of sensing flops to store a fluid level value based on contact with fluid at the corresponding position.9. The sensing die of claim 8 , wherein the plurality of sensing flops ...

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Номер записи: 13
23-01-2020 дата публикации

ON-DIE TIME-SHIFTED ACTUATOR EVALUATION

Номер: US20200023638A1
Автор: Anderson Daryl E, Martin Eric
Принадлежит: Hewlett-Packard Development Company, L.P.

In one example in accordance with the present disclosure, a fluid ejection die is described. The die includes a number of actuator sensors disposed on the fluid ejection die to sense a characteristic of a corresponding actuator and to output a first voltage corresponding to the sensed characteristic c. Each actuator sensor is coupled to a respective actuator and multiple coupled actuator sensors and actuators are grouped as primitives on the fluid ejection die. The die also includes an actuator evaluation die per primitive to evaluate an actuator characteristic of any actuator within the primitive Based on the first voltage and a threshold voltage. The die also includes a time-shift chain component to communicate a delayed evaluation signal, which delayed evaluation signal delays an evaluation of the actuator characteristic a predetermined amount of time following an activation event. 1. A fluid ejection die comprising: each actuator sensor is coupled to a respective actuator; and', 'multiple coupled actuator sensors and actuators are grouped as primitives on the fluid ejection die;, 'a number of actuator sensors disposed on the fluid ejection die to sense a characteristic of a correspond ng actuator and to output a first voltage corresponding to the sensed characteristic, whereinan actuator evaluation device per primitive to evaluate an actuator characteristic of any actuator within the primitive based on the first voltage and a threshold voltage; anda time-shift chain component per primitive to communicate a delayed evaluation signal, which delayed evaluation signal delays an evaluation of the actuator characteristic a predetermined amount of time following an activation signal.2. The fluid ejection die of claim 1 , wherein the number of actuator sensors comprise impedance sensors that sense an impedance within an ejection chamber of a corresponding actuator.3. The fluid ejection die of claim 1 , wherein:an activation event is triggered by the activation signal ...

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Номер записи: 14
04-02-2016 дата публикации

FLUID EJECTION DEVICES AND METHODS THEREOF

Номер: US20160031243A1
Автор: ANDERSON Daryl E., Ghozeil Adam L., Van Brocklin Andrew L.
Принадлежит: Hewlett-Packard Development Company, L.P.

Fluid ejection devices and methods thereof are disclosed in the present disclosure. A method includes establishing fluid communication between an ejection chamber and a fluid supply chamber of the fluid ejection device such that the ejection chamber includes a nozzle and an ejection member to selectively eject fluid through the nozzle. The method also includes detecting at least one impedance in the fluid by a sensor unit having a sensor plate. 1. A fluid ejection device , comprising:a fluid supply chamber to store fluid;a plurality of ejection chambers including nozzles and corresponding ejection members to selectively eject the fluid through the respective nozzles;a channel to establish fluid communication between the fluid supply chamber and the ejection members;a temperature adjustment module to establish at least one temperature of the fluid of the fluid ejection device;a sensor unit having a sensor plate, the sensor unit to detect at least one impedance in the fluid corresponding to the at least one temperature; anda fluid identification module to identify a characteristic of the fluid based on the sensed impedance.2. The fluid ejection device of claim 1 , wherein the fluid identification module determines a concentration of ions in the fluid.3. The fluid ejection device of claim 1 , wherein the fluid identification module determines whether the fluid is compatible with the fluid ejection device.4. The fluid ejection device of claim 1 , wherein the fluid identification module determines a manufacturer of the fluid.5. The fluid ejection device of claim 1 , wherein the sensor unit selectively detects a first impedance of the fluid corresponding to a first temperature established by the temperature adjustment module and a second impedance of the fluid corresponding to a second temperature established by the temperature adjustment module different than the first temperature.6. The fluid ejection device of claim 1 , wherein the sensor plate is disposed in the ...

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Номер записи: 15
17-02-2022 дата публикации

SENSOR SIGNAL ENCODED VIA MODULATED MECHANICAL INTERACTION WITH SENSOR(S)

Номер: US20220048291A1
Автор: ANDERSON Daryl E., Martin Eric T.
Принадлежит: Hewlett-Packard Development Company, L.P.

In various examples, a fluid ejection die, or a device such as a printhead or printbar on which the fluid ejection device is installed, may include a sensor that detects mechanical force imposed by a system in which the fluid ejection die is installed. There also may be memory, as well as a logic operably coupled with the sensor and the memory. The logic may extract information from a signal raised by the sensor and store the information in the memory. The information may have been encoded into the signal via mechanical interaction between a component of the system and the sensor. The mechanical interaction may have been modulated by the system to encode the information. 1. A fluid ejection die , comprising:a sensor to detect mechanical force imposed by a system in which the fluid ejection die is installed;memory; andlogic operably coupled with the sensor and the memory, wherein the logic is to:extract information from a signal raised by the sensor, wherein the information is encoded into the signal via mechanical interaction between a component of the system and the sensor, wherein the mechanical interaction is modulated by the system to encode the information; andstore the information in the memory.2. The fluid ejection die of claim 1 , wherein the sensor comprises a strain sensor.3. The fluid ejection die of claim 2 , wherein the component of the system comprises a servicing mechanism claim 2 , and the mechanical interaction includes cleaning of the fluid ejection die by the servicing mechanism.4. The fluid ejection die of claim 1 , wherein the component of the system comprises a printhead cap claim 1 , and the mechanical interaction includes sealing of a nozzle with the printhead cap.5. The fluid ejection die of claim 3 , wherein the sensor comprises a sensor array claim 3 , and the mechanical interaction comprises a direction or velocity of the wiping across the sensor array.6. The fluid ejection die of claim 3 , wherein the mechanical interaction comprises a ...

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Номер записи: 16
17-02-2022 дата публикации

PRINT MATERIAL LEVEL SENSING

Номер: US20220048296A1
Автор: ANDERSON Daryl E., Gardner James Michael
Принадлежит: Hewlett-Packard Development Company, L.P.

A print material level sensor has a series of print material level sensing devices disposed at intervals to detect presence of a print material at successive depth zones in a container. Each print material level sensing device includes a heater to emit heat at its depth zone and a sensor to sense heat at the depth zone and to output a signal based on the heat sensed. The sensor has control circuitry to enable supply of electrical power to a heater of a first print material level sensing device in a first depth zone and to receive the signal from the sensor of the first print material level sensing device, the control circuitry including a comparator to compare a value of the signal to a target value, wherein the control circuitry stops enabling supply of the electrical power to the heater when the value of the signal is at least equal to the target value. 1. A print material level sensor comprising:a series of print material level sensing devices disposed at intervals to detect a presence of a print material at successive depth zones in a container, wherein each print material level sensing device includes a heater to emit heat at its depth zone and a sensor to sense heat at the depth zone and to output a signal based on the heat sensed; andcontrol circuitry to enable a supply of electrical power to the heater of any one of the print material level sensing devices in its respective depth zone and to receive the signal from the sensor of the print material level sensing device, the control circuitry including a comparator to compare a value of the signal to a target value, wherein the control circuitry disables the supply of the electrical power to the heater when the value of the signal is at least equal to the target value.2. The print material level sensor of claim 1 , the control circuitry further including a register to store the target value.3. The print material level sensor of claim 1 , the control circuitry further including a digital to analog converter to ...

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Номер записи: 17
17-02-2022 дата публикации

PRINT MATERIAL LEVEL SENSING

Номер: US20220048297A1
Автор: Anderson Daryl E, Dagg Evan Clay, Gardner James Michael
Принадлежит:

A print material level sensor has a power node to receive electrical power and a series of print material level sensing devices to receive electrical power from the power node. The print material level sensing devices are disposed at intervals to detect presence of a print material at successive depth zones in a container, wherein each print material level sensing device includes a heater to emit heat at its depth zone and a sensor to sense heat at the depth zone. The sensor has control circuitry to turn on the heater of a first print material level sensing device at a first depth zone for a first time duration during the sensing of the first depth zone and to turn on the heater of a second print material level sensing device at a second depth zone, further from the power node than the first depth zone, for a second time duration longer than the first time duration during the sensing of the second depth zone. 1. A print material level sensor comprising:a power node to receive electrical power;a series of print material level sensing devices to receive electrical power from the power node and disposed at intervals to detect a presence of a print material at successive depth zones in a container, wherein each print material level sensing device includes a heater to emit heat at its depth zone and a sensor to sense heat at the depth zone; andcontrol circuitry to turn on the heater of a first print material level sensing device at a first depth zone for a first time duration during the sensing of the first depth zone and to turn on the heater of a second print material level sensing device at a second depth zone, further from the power node than the first depth zone, for a second time duration longer than the first time duration during the sensing of the second depth zone.2. The print material level sensor of claim 1 , wherein the control circuitry turns on the heater of each print material level sensing device of a group of print material level sensing devices at depth ...

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Номер записи: 18
30-01-2020 дата публикации

FLUIDIC DIE WITH MASK REGISTER SETS

Номер: US20200031120A1
Автор: Anderson Daryl E, Martin Eric T
Принадлежит: Hewlett-Packard Development Company, L.P.

A fluidic die may include an array of fluid actuators, an actuation data register to store actuation data that indicates each fluid actuator to actuate for a set of actuation events, at least one storage device to store sets of mask data, each set of mask data indicating a set of fluid actuators of the array enabled for actuation for a respective actuation event of the set of actuation events, sequencing logic coupled to the at least one storage device to select one of the sets of mask data after each actuation event of the set of actuation events and actuation logic to electrically actuate a subset of the fluid actuators based at least in part on the actuation data register and the sequenced set of mask data for the respective actuation event. 1. A fluidic die comprising:an array of fluid actuators;an actuation data register to store actuation data that indicates each fluid actuator to actuate for a set of actuation events;at least one storage device to store sets of mask data, each set of e mask data indicating a set of fluid actuators of the array enabled for actuation for a respective actuation event of the set of actuation events;sequencing logic coupled to the at least one storage device to select one set of mask data of the set of mask data for each actuation event of the set of actuation events;actuation logic coupled to the actuation data register, the at least one storage device, and the respective fluid actuators, the actuation logic to electrically actuate a subset of the fluid actuators based at least in part on the actuation data register and the selected set of mask data for the respective actuation event.2. The fluidic die of claim 1 , further comprising:an array of nozzles, wherein each respective nozzle of the array comprises a respective fluid actuator of the array of fluid actuators as a respective fluid ejector, and each respective fluid ejector is to actuate to thereby eject a fluid drop via the respective nozzle of the array of nozzles.3. The ...

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Номер записи: 19
01-05-2014 дата публикации

FLUID EJECTION SYSTEMS AND METHODS THEREOF

Номер: US20140118430A1
Автор: ANDERSON Daryl E., Ghozeil Adam L., Van Brocklin Andrew L.
Принадлежит:

Fluid ejection systems and methods thereof are disclosed in the present disclosure. The method includes establishing fluid communication between an ejection chamber and a fluid supply chamber of the fluid ejection system such that the ejection chamber includes a nozzle and an ejection member to selectively eject the fluid through the nozzle. The method also includes detecting at feast one impedance in the fluid by a sensor unit haying a sensor plate, and identifying the characteristic of the fluid by a fluid identification module based on the at least one detected impedance value t obtain an identified fluid characteristic. 1. A fluid ejection system comprising: a fluid supply chamber to store fluid;', 'a plurality or ejection chambers including nozzles and corresponding ejection members to selectively eject the fluid through the respective nozzles;', 'a channel to establish fluid communication between the fluid supply chamber and the ejection members;', 'a temperature adjustment module to establish at least one temperature of the fluid of the fluid ejection device; and', 'a sensor unit having a sensor plate, the sensor unit to detect at least one impedance in the fluid at the at least one temperature to obtain at least one detected impedance value; and, 'a fluid ejection device includinga fluid identification module to identify a characteristic of the fluid based on the at Least one detected impedance value to obtain an identified fluid characteristic.2. The fluid ejection system according to claim 1 , further comprising:a comparison module to compare the identified fluid characteristic with a predetermined fluid characteristic in obtain a comparison result and to determine condition of the fluid based on the comparison result.3. The fluid ejection system according to claim 1 , wherein the fluid ejection device further comprises:a temperature identification module to identify the at least one temperature of the fluid of the fluid ejection device.4The fluid ejection ...

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Номер записи: 20
01-05-2014 дата публикации

INKJET PRINTHEAD DEVICE, FLUID EJECTION DEVICE, AND METHOD THEREOF

Номер: US20140118435A1
Автор: ANDERSON Daryl E., Ghozeil Adam L., Van Brocklin Andrew L
Принадлежит:

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. 1. A fluid ejection device , comprising:a fluid supply chamber to store fluid:a plurality of ejection chambers including nozzles and corresponding ejection members to selectively eject the fluid through the respective nozzles;a channel to establish fluid communication between the fluid supply chamber and the ejection chambers; anda pressure sensor unit having a sensor plate, the sensor plate to output a voltage value corresponding to a cross-sectional area of an amount of fluid in at least one ejection chamber.2. The fluid ejection device according to claim 1 , wherein the pressure sensor unit further comprises:an air bubble detect micro-electro-mechanical systems (ABD MEMS) pressure sensor.3. The fluid ejection device according to claim 1 , wherein the voltage value output from the pressure sensor unit is a function of a back pressure within the at least one ejection chamber.4. The fluid ejection device according to claim 1 , further comprising:a grounding member disposed in the at least one ejection chamber; anda current source to transmit an electrical current signal to the grounding member through fluid in contact with and disposed between the respective sensor plate and the grounding member.5. The fluid ejection device according to claim 4 , wherein a diameter of a respective nozzle corresponding to the at least one ejection chamber is greater than diameters of respective ...

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Номер записи: 21
30-01-2020 дата публикации

Fluid ejection dies including strain gauge sensors

Номер: US20200033203A1
Автор: Berkeley Fisher, Daryl E Anderson, James Gardner
Принадлежит: Hewlett Packard Development Co LP

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.

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Номер записи: 22
30-01-2020 дата публикации

FLUID EJECTION MASK DATA SELECTION

Номер: US20200034673A1
Автор: Anderson Daryl E, Martin Eric T
Принадлежит: Hewlett-Packard Development Company, L.P.

A fluid ejection system may include an actuation controller that selects a first set of mask data for enabling fluid actuators with respect to a first region and a second set of mask data for enabling fluid actuators with respect to a second region. The first set of mask data may indicate a first number of fluid actuators of an array of fluid actuators enabled for actuation for a respective actuation event of a first set of actuation events. The second set of mask data may indicate a second number of fluid actuators of the array of fluid actuators enabled for actuation for a respective actuation event of a second set of actuation events. 1. A fluid ejection system comprising: select a first set of mask data for enabling fluid actuators with respect to a first region, the first set of mask data indicating a first number of fluid actuators of an array of fluid actuators enabled for actuation for a respective actuation event of a first set of actuation events; and', 'a select a second set of mask data for enabling fluid actuators with respect to a second region, the second set of mask, data indicating a second number of fluid actuators of the array of fluid actuators, different than the first number, enabled for actuation for a respective actuation event of a second set of actuation events., 'an actuation controller to2. The fluid ejection system of claim 1 , wherein the controller is to select the first set of mask data and to select the second set of mask data based upon a characteristic of fluid actuations with respect to the first region and a characteristic of fluid actuations with respect to the second region.3. The fluid ejection system of claim 2 , wherein the characteristic comprises a first fluid actuator actuation density of the first region and a second fluid actuator actuation density of the second region claim 2 , respectively claim 2 ,4. The fluid ejection system of claim 3 , wherein the controller is to determine the first fluid actuator actuation ...

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Номер записи: 23
06-02-2020 дата публикации

DELAY ELEMENTS FOR ACTIVATION SIGNALS

Номер: US20200039215A1
Автор: ANDERSON Daryl E., Martin Eric
Принадлежит: Hewlett-Packard Development Company, L.P.

In some examples, a fluidic die includes a plurality of fluid actuators, and a controller to determine, based on input control information relating to controlling actuation of the plurality of fluid actuators, whether a first fluid actuator of the plurality of fluid actuators is to be actuated, and in response to determining that the first fluid actuator is to be actuated, activate a delay element associated with the first fluid actuator, the delay element to delay an activation signal propagated to selected fluid actuators of the plurality of fluid actuators in response to an actuation event. 1. A fluidic die comprising:a plurality of fluid actuators; and determine, based on input control information relating to controlling actuation of the plurality of fluid actuators, whether a first fluid actuator of the plurality of fluid actuators is to be actuated, and', 'in response to determining that the first fluid actuator is to be actuated, activate a delay element associated with the first fluid actuator, the delay element to delay an activation signal propagated to selected fluid actuators of the plurality of fluid actuators in response to an actuation event., 'a controller to2. The fluidic die of claim 1 , wherein the controller is to:in response to determining that the first fluid actuator is not to be actuated, deactivate the delay element associated with the first fluid actuator such that the activation signal is not delayed by the delay element.3. The fluidic die of claim 1 , further comprising:a plurality of delay elements individually associated with respective fluid actuators of the plurality of fluid actuators, determine, based on the input control information, a first subset of the plurality of fluid actuators that are to be actuated, and a second subset of the plurality of fluid actuators that are not to be actuated, and', 'activate delay elements associated with the first subset of the plurality of fluid actuators to delay the activation signal, and ...

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Номер записи: 24
16-02-2017 дата публикации

NOZZLE CONDITION EVALUATION

Номер: US20170043573A1
Автор: ANDERSON Daryl E., Martin Eric T.
Принадлежит: Hewlett-Packard Development Company, L.P.

The present subject matter relates to evaluating nozzle condition of a plurality of nozzles. In one example, drive bubble detect (DBD) test results for a set of nozzles from among the plurality of nozzles are stored by a print head in a test result register, where the test result register is provided onto the print head. Further, status bits of a result-ready register provided in the print head are set to a predetermined value by the print head responsive to storing of the DBD test results in the test result register. Further, based on the setting, the DBD test results are obtained by a control unit, from the test result register, for evaluating the nozzle condition. 1. A method for evaluating nozzle condition of a plurality of nozzles , the method comprising:storing, by a print head, drive bubble detect (DBD) test results for a set of nozzles from among the plurality of nozzles in a test result register, wherein the test result register is provided onto the print head;setting, by the print head, status bits of a result-ready register to a predetermined value provided in the print head responsive to storing of the test result register; andobtaining, by a control unit, the DBD test results from the test result register, based on the setting, for evaluating the nozzle condition.2. The method as claimed in claim 1 , wherein the method further comprises:resetting, by the control unit, the status bits of the result-ready register to indicate transfer of the DBD test results from the test result register to a printer memory; andinitiating, by the print head, another set of nozzles from among the plurality of nozzles for performing DBD tests for evaluating the nozzle condition.3. The method as claimed in claim 1 , wherein the storing further comprisesdetermining, by the print head, a nozzle, from among the set of nozzles, having the DBD test result as fail;storing the DBD test result for the nozzle in the test result register; andupdating a nozzle count register to ...

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Номер записи: 25
15-02-2018 дата публикации

INKJET PRINTHEAD DEVICE, FLUID EJECTION DEVICE, AND METHOD THEREOF

Номер: US20180043686A1
Автор: ANDERSON Daryl E., Ghozeil Adam L., Van Brocklin Andrew L.
Принадлежит: Hewlett-Packard Development Company, L.P.

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. 1. A fluid ejection device , comprising: a diameter of a nozzle in a test ejection chamber is greater than a diameter of a nozzle in a non-test ejection chamber; and', 'the test ejection chamber comprises a pressure sensor plate., 'a plurality of ejection chambers comprising nozzles and corresponding ejection members to selectively eject a fluid through the respective nozzles by forming a vapor bubble in an ejection chamber which forces a fluid drop out the corresponding nozzle, wherein2. The fluid ejection device of claim 1 , wherein the pressure sensor plate outputs a voltage proportional to a change in back pressure.3. The fluid ejection device of claim 1 , wherein pressure sensor plates are located just in test chambers.4. The fluid ejection device of claim 1 , further comprising a refill determination module to determine an amount of time to refill at least one ejection chamber.5. The fluid ejection device of claim 4 , further comprising a count determination module to determine a supply condition based on an output from the refill determination module.6. The fluid ejection device of claim 5 , wherein the supply condition is a pre-exhaustion condition.7. A method for detecting a pre-exhaustion condition of an ink reservoir associated with a fluidic ejection device claim 5 , the method comprising:measuring at least one of: a firing chamber pressure and a firing chamber refill ...

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Номер записи: 26
13-02-2020 дата публикации

DROP WEIGHTS CORRESPONDING TO DROP WEIGHT PATTERNS

Номер: US20200047494A1
Автор: Anderson Daryl E, Martin Eric
Принадлежит: Hewlett-Packard Development Company, L.P.

In some examples, a fluidic die includes a plurality of fluid actuators to cause ejection of fluid towards a target, an actuation data register to store actuation data that indicates each fluid actuator of the plurality of fluid actuators to actuate, and a controller to use different drop weight patterns and actuation data in the actuation data register to dispense fluid of different drop weights using the plurality of fluid actuators. Each drop weight pattern of the different drop weight patterns indicates a respective set of fluid actuators of the plurality of fluid actuators enabled for actuation, and a first drop weight pattern of the different drop weight patterns corresponding to a first drop weight, and a second drop weight pattern of the different drop weight patterns corresponding to a second drop weight different from the first drop weight. 1. A fluidic die comprising:a plurality of fluid actuators to cause ejection of fluid towards a target;an actuation data register to store actuation data that indicates each fluid actuator of the plurality of fluid actuators to actuate; anda controller to use different drop weight patterns and actuation data in the actuation data register to dispense fluid of different drop weights using the plurality of fluid actuators, each drop weight pattern of the different drop weight patterns indicating a respective set of fluid actuators of the plurality of fluid actuators enabled for actuation, and a first drop weight pattern of the different drop weight patterns corresponding to a first drop weight, and a second drop weight pattern of the different drop weight patterns corresponding to a second drop weight different from the first drop weight.2. The fluidic die of claim 1 , further comprising a plurality of mask registers to store respective drop weight patterns of the different drop weight patterns.3. The fluidic die of claim 2 , further comprising:an actuation data register to store actuation data that indicates each fluid ...

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Номер записи: 27
23-02-2017 дата публикации

Determining a time instant for an impedance measurement

Номер: US20170050428A1
Автор: Daryl E Anderson, Eric T Martin, Peter James Fricke
Принадлежит: Hewlett Packard Development Co LP

In an example, a method for determining an issue in an inkjet nozzle includes providing an initial fire pulse for firing a nozzle, and receiving the initial fire pulse as a delayed fire pulse at a primitive of the nozzle. The method includes firing the nozzle with the delayed fire pulse, and determining a first time instant following the delayed fire pulse for taking a first impedance measurement across the nozzle.

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Номер записи: 28
23-02-2017 дата публикации

MANAGING PRINTHEAD NOZZLE CONDITIONS

Номер: US20170050429A1
Автор: Anderson Daryl E, Martin Eric T.
Принадлежит: Hewlett-Packard Development Company, L.P.

In an example, a method of managing a nozzle condition test on a printhead includes instructing a printhead to perform impedance measurements on a plurality of nozzles in a first set of nozzles. The method also includes retrieving from the printhead, an impedance measurement result corresponding with each nozzle, where each impedance measurement result indicates a nozzle condition of its corresponding nozzle. 1. A method of managing a nozzle condition test on a printhead comprising:instructing a printhead to perform impedance measurements on a plurality of nozzles in a first set of nozzles; andretrieving from the printhead, an impedance measurement result corresponding with each nozzle, each impedance measurement result indicating a nozzle condition of its corresponding nozzle.2. A method as in claim 1 , wherein retrieving an impedance measurement result corresponding with each nozzle comprises retrieving each impedance measurement result from a distinct printhead register that corresponds with a nozzle column to which the nozzle belongs.3. A method as in claim 1 , wherein retrieving an impedance measurement result comprises retrieving a combined impedance measurement result from a single cumulative register on the printhead claim 1 , the combined impedance measurement result indicating a nozzle condition of at least one nozzle within the first set of nozzles.4. A method as in claim 1 , wherein the first set of nozzles comprises one nozzle from each of a plurality of nozzle columns.5. A method as in claim 1 , further comprising claim 1 , determining from each impedance measurement result whether a corresponding nozzle is functioning properly.6. A method as in claim 5 , further comprising:instructing the printhead to perform impedance measurements on a second set of nozzles when each nozzle in the first set of nozzles is functioning properly; andinstructing the printhead to perform impedance measurements on the first set of nozzles again if a nozzle in the first set ...

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Номер записи: 29
15-05-2014 дата публикации

FLUID EJECTION DEVICES AND METHODS THEREOF

Номер: US20140132659A1
Автор: ANDERSON Daryl E., Ghozeil Adam L., Van Brocklin Andrew L
Принадлежит:

Fluid ejection devices and methods thereof are disclosed in the present disclosure. A method includes establishing fluid communication between an ejection chamber and a fluid supply chamber of the fluid ejection device such that the ejection chamber includes a nozzle and an ejection member to selectively eject fluid through the nozzle. The method also includes detecting at least one impedance in the fluid by a sensor unit having a sensor plate. 1. A fluid ejection device comprising:fluid supply chamber to store fluid;a plurality of ejection chambers including nozzles and corresponding ejection, members to selectively eject the fluid through the respective nozzles;a channel to establish fluid communication job between the fluid supply chamber and the ejection members;a temperature adjustment module to establish at least one temperature of the fluid of the fluid ejection device; anda sensor unit having a sensor plate, the sensor unit to detect at least one impedance in the fluid corresponding to the at least one temperature.2. (canceled)3. The fluid ejection device according to claim 1 , wherein the sensor unit selectively detects a first impedance of the fluid corresponding to a first temperature established by the temperature adjustment module and a second impedance of the fluid corresponding to a second temperature established by the temperature adjustment module different than the first temperature.4. The fluid ejection device according to claim 1 , wherein the sensor unit detects a plurality of impedances in the fluid corresponding to the at least one temperature at predetermine time periods.5. (canceled)6. The fluid ejection device according to claim 1 , wherein the sensor unit further comprises:an air bubble detect micro-electro-mechanical systems (ABD MEMS) pressure sensor.79-. (canceled)10. The fluid ejection device recording to claim 1 , wherein the sensor plate is disposed in the channel.11. The fluid ejection device according to claim 1 , wherein the ...

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Номер записи: 30
20-02-2020 дата публикации

FLUIDIC DIE WITH DROP WEIGHT SIGNALS

Номер: US20200055309A1
Автор: Anderson Daryl E, Martin Eric
Принадлежит: Hewlett-Packard Development Company, L.P.

A fluidic die includes an array of nozzles, each nozzle to eject a fluid drop in response to a corresponding actuation signal having an actuation value. Nozzle select logic provides for each nozzle a nozzle select signal having a select value or a non-select value. Actuation logic provides the respective actuation signal for each nozzle, the actuation logic to receive one or more drop weight signals, and for each nozzle select signal having the select value, to provide an actuation signal having an actuation value to the corresponding nozzle and/or to one or more neighboring nozzles based on a state of the one or more drop weight signals. 1. A fluidic die comprising:an array of nozzles, each nozzle to eject a fluid drop in response to a corresponding actuation signal having an actuation value;nozzle select logic to provide for each nozzle a nozzle select signal having a select value or a non-select value; and receive one or more drop weight signals; and', 'for each nozzle select signal having the select value, to provide an actuation signal having an actuation value to the corresponding nozzle and/or to one or more neighboring nozzles based on a state of the one or more drop weight signals., 'actuation logic to provide the respective actuation signal for each nozzle, the actuation logic to2. The fluidic die of claim 1 , the nozzles of the array of nozzles arranged in a column claim 1 , the neighboring nozzles comprising nozzles adjacent to the corresponding nozzle.3. The fluidic die of claim 1 , each nozzle of the array of nozzles to eject a fluid drop of a same drop weight.4. The fluidic die of claim 1 , the corresponding nozzle and the one or more neighboring nozzles disposed relative to one another such that fluid drops ejected by the corresponding nozzle and the one or more neighboring nozzles merge to have an effect of a larger fluid drop.5. The fluidic die of claim 1 , the nozzle select logic to:receive actuation data, the actuation data including actuation ...

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Номер записи: 31
18-03-2021 дата публикации

Dies including strain gauge sensors and temperature sensors

Номер: US20210078320A1
Автор: Berkeley Fisher, Daryl E Anderson, James M. Gardner
Принадлежит: Hewlett Packard Development Co LP

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.

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Номер записи: 32
18-03-2021 дата публикации

FLUIDIC DIE PURGING

Номер: US20210078332A1
Автор: ANDERSON Daryl E., Esterri Pedra Pere, Gardner James Michael, Martin Eric
Принадлежит: Hewlett-Packard Development Company, L.P.

A fluidic die may include a fluidic channel, and an electrode disposed within a fluidic channel of the fluidic die to determine if a difference between an initially-measured impedance and a subsequently-measured impedance as measured by the electrode indicates a completion of a purging of an initial fluid from the fluidic die and a replacement with a second fluid. 1. A fluidic die , comprising:a fluidic channel; andan electrode disposed within a fluidic channel of the fluidic die to determine if a difference between an initially-measured impedance and a subsequently-measured impedance as measured by the electrode indicates a completion of a purging of an initial fluid from the fluidic die and a replacement with a second fluid.2. The fluidic die of claim 1 , comprising control circuitry to activate the electrode within the fluidic die claim 1 , wherein the control circuitry provides a current to the electrode claim 1 , the electrode being in contact with the initial fluid or the second fluid within the fluidic die.3. The fluidic die of claim 1 , wherein the fluidic die comprises:at least one actuator, activates the electrode to measure the initial impedance of the initial fluid or the second fluid within at least one fluidic channel of the fluidic die;', 'activates the actuator to pump the initial fluid from the fluidic die; and', 'activates the electrode to measure the subsequent impedance of the initial fluid or the second fluid., 'wherein the control circuitry4. The fluidic die of claim 3 , wherein the control circuitry:determines if the subsequent impedance is stable over a period of time, greater than a minimum expected delta from a baseline impedance of the initial fluid, or combinations thereof; andin response to a determination that the subsequent impedance is not stable over a period of time, is not greater than a minimum expected delta from a baseline impedance of the initial fluid, or combinations thereof, activates the actuator to pump the fluid from the ...

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Номер записи: 33
23-03-2017 дата публикации

INKJET PRINTING SYSTEM, FLUID EJECTION SYSTEM, AND METHOD THEREOF

Номер: US20170080707A1
Автор: ANDERSON Daryl E., Ghozeil Adam L., Van Brocklin Andrew L.
Принадлежит: Hewlett-Packard Development Company, L.P.

An inkjet printing system, fluid ejection system and method thereof are disclosed. The fluid ejection system includes a fluid ejection device and a determination module to determine a supply condition based on the count value output by the converter module. 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, 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 ejection chamber. The fluid ejection system also includes a converter module to output a count value corresponding to the voltage value output by the pressure sensor unit. 1. A fluid ejection system , comprising: a fluid supply chamber to store fluid;', 'a plurality of ejection chambers including nozzles and corresponding ejection members to selectively eject the fluid through the respective nozzles;', 'at least one channel to establish fluid communication between the fluid supply chamber and the plurality of ejection chambers;', '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 at least one ejection chamber; and', 'a converter module to receive an output signal from the pressure sensor unit and output a count value corresponding to the voltage value of the received output by the pressure sensor unit;, 'a fluid ejection device comprisinga refill determination module to determine an amount of time to refill the at least one ejection chamber; and [ the count value output by the converter module; and', 'the amount of time to refill the at least one ejection chamber; and, 'determine a supply condition based on, 'determine that the fluid supply chamber is in a pre-exhaustion condition when back pressure and refill time increase., 'a count determination module to2. The fluid ejection system of claim ...

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Номер записи: 34
29-03-2018 дата публикации

AUTHENTICATION VALUE FOR A FLUID EJECTION DEVICE

Номер: US20180086122A1
Автор: ANDERSON Daryl E., Martin Eric T., Rice Huston W.
Принадлежит:

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. 1. A fluid ejection device , comprising:a plurality of analog devices; anda storage element storing an authentication value based on electrical characteristics of a subset of the plurality of analog devices.2. The fluid ejection device of claim 1 , wherein the electrical characteristics of at least some of the analog devices are measurable by a fluid ejection system claim 1 , and wherein the authentication value is usable by the fluid ejection system to verify an authenticity of the fluid ejection device based on measured values of the at least some of the analog devices.3. The fluid ejection device of claim 1 , wherein the storage element further stores information that indicates the subset of the plurality of analog devices on which the authentication value is based.4. The fluid ejection device of claim 1 , further comprising an electrical connection to connect to a host device claim 1 , the electrical connection being connected to the storage element to communicate the authentication value to the host device claim 1 , and being connected to at least some of the plurality of analog devices to facilitate measuring of the electrical characteristics of the at least some of the analog devices by the host device.5. The fluid ejection device of claim 4 , further comprising an analog-to-digital converter coupled between the electrical connection and the at least some of the analog devices to facilitate measuring the electrical characteristics of the at least some of the analog devices.6. The fluid ejection device of claim 1 , wherein the authentication value stored in the storage element is encrypted.7. The fluid ejection device of claim 1 , wherein the authentication value comprises an encrypted version of a comparison value claim 1 , the comparison value includes a ...

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Номер записи: 35
30-03-2017 дата публикации

Modules to evaluate ink signals

Номер: US20170087829A1
Автор: Daryl E Anderson, Eric T Martin, James Michael Gardner, Peter James Fricke
Принадлежит: Hewlett Packard Development Co LP

An example device in accordance with an aspect of the present disclosure includes modules to generate an input signal, apply the input signal to an ink sample to obtain an ink signal, compare the ink signal to a reference value, and identify whether the ink signal is consistent with an ink signature. A module may be contained on an inkjet printhead die.

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Номер записи: 36
20-04-2017 дата публикации

Modules to identify nozzle chamber operation

Номер: US20170106646A1
Автор: Daryl E Anderson, Eric T Martin, James Michael Gardner, Peter James Fricke
Принадлежит: Hewlett Packard Development Co LP

An example device in accordance with an aspect of the present disclosure includes modules to communicate an input signal to an ink sample to obtain an ink signal, compare the ink signal to a reference value, and identify an indicator of nozzle chamber operation corresponding to the ink signal. A module may be contained on an inkjet printhead die, such that the device may generate the input signal on the inkjet print head die.

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Номер записи: 37
18-04-2019 дата публикации

DETECTING FLUID LEVELS USING A COUNTER

Номер: US20190111695A1
Автор: ANDERSON Daryl E., Cumbie Michael W., Fisher Berkeley, Gardner James Michael
Принадлежит:

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. 1. A printing cartridge comprising: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; anda counter to convert the time-based information to a digital code based on a number of clock cycles.2. The printing cartridge of claim 1 , wherein the counter is enabled based on the time-based information.3. The printing cartridge of claim 1 , further including a heating element to emit a heat pulse to be detected at a sensing location.4. The printing cartridge of claim 3 , wherein the counter is to reset the number of clock cycles in response to the heating element emitting the heat pulse.5. The printing cartridge of claim 3 , wherein the counter is to reset the number of clock cycles at the end of the heat pulse.6. The printing cartridge of claim 3 , wherein each of the sensing locations include a sensing element associated with a fluid level.7. The printing cartridge of claim 6 , wherein the sensing elements generate the sensed voltage based on a detected temperature at the selected sensing location.8. The printing cartridge of claim 1 , ...

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Номер записи: 38
18-04-2019 дата публикации

DETECTING FLUID LEVELS USING A VARIABLE THRESHOLD VOLTAGE

Номер: US20190111696A1
Автор: ANDERSON Daryl E., Cumbie Michael W., Fisher Berkeley, Gardner James Michael
Принадлежит:

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. 1. A printing cartridge comprising: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 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., 'a voltage comparator to2. The printing cartridge of claim 1 , wherein information regarding the selected sensing location is encrypted.3. The printing cartridge of claim 1 , wherein the on-die controller randomly selects the sensing location from the plurality of sensing locations.4. The printing cartridge of claim 1 , wherein the on-die controller selects the sensing location a second time during a fluid level measurement request.5. The printing cartridge of claim 4 , wherein the variable threshold voltage is a first variable threshold voltage claim 4 , the on-die controller to provide a second variable threshold voltage when the sensing location is selected the second time.6. The printing cartridge of claim 5 , wherein the first variable threshold voltage is different than the second variable ...

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Номер записи: 39
09-04-2020 дата публикации

FLUIDIC DIE

Номер: US20200108601A1
Автор: Anderson Daryl E, Martin Eric
Принадлежит: Hewlett-Packard Development Company, L.P.

A fluidic die may include an array of fluid actuators, an actuation data register to store actuation data that indicates each fluid actuator to actuate for a set of actuation events, a mask register to store mask data that indicates a set of fluid actuators of the array enabled for actuation for a respective actuation event of the set of actuation events, a pattern select register to store a pattern selection, input mask data generation circuitry to build a set of mask data with subsets of mask data, each of the subsets having a pattern based upon a pattern selection input, and to populate the mask register with the set of mask data, and actuation logic to 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. 1. A fluidic die comprising:an array of fluid actuators;an actuation data register to store actuation data that indicates each fluid actuator to actuate for a set of actuation events;a mask register to store mask data that indicates a set of fluid actuators of the array enabled for actuation for a respective actuation event of the set of actuation events;mask data generation circuitry to build a set of mask data from subsets of mask data, each of the subsets having a pattern based upon a pattern selection input, and to populate the mask register with the set of mask data; andactuation logic coupled to the actuation data register, the mask register, and the respective fluid actuators, the actuation logic to 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.2. The fluidic die of claim 1 , wherein the mask data generation circuitry comprises:a shift register;a pattern select register to store the pattern selection input; anda shift pattern state machine to load the shift register with a selected pattern of mask data based on the stored pattern ...

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Номер записи: 40
07-05-2015 дата публикации

INKJET PRINTING SYSTEM, FLUID EJECTION SYSTEM, AND METHOD THEREOF

Номер: US20150124011A1
Автор: ANDERSON Daryl E., Ghozeil Adam L ., Van Brocklin Andrew L.
Принадлежит:

An inkjet printing system, fluid ejection system and method thereof are disclosed. The fluid ejection system includes a fluid ejection device and a determination module to determine a supply condition based on the count value output by the converter module. 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, 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 ejection chamber. The fluid ejection system also includes a converter module to output a count value corresponding to the voltage value output by the pressure sensor unit. 1. A fluid ejection device , comprising:a fluid supply chamber to store fluid;a plurality of ejection chambers including nozzles and corresponding ejection members to selectively eject the fluid through the respective nozzles;a channel to establish fluid communication between the fluid supply chamber and the ejection chambers;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 at least one ejection chamber; anda converter module to output a count value corresponding to the voltage value output by the pressure sensor unit.2. The fluid ejection device according to claim 1 , further comprising an interface for installing the fluid ejection device in a fluid ejection system comprising a determination module to determine a supply condition based on the count value output through the interface by the converter module of the fluid ejection device.3. The fluid ejection device according to claim 1 , wherein the voltage value output from the pressure sensor unit is a function of a back pressure within the at least one ejection chamber.4. The fluid ejection device according to claim 1 , wherein the fluid ejection device further comprises:a ...

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Номер записи: 41
04-05-2017 дата публикации

DETECTING INK CHARACTERISTICS

Номер: US20170120620A1
Автор: Anderson Daryl E
Принадлежит: Hewlett-Packard Development Company, L.P.

A method for determining characteristics of an ink is described. The method includes subjecting the ink of an inkjet printing system to an alternating signal of a first frequency to generate response signals from the ink, where the response signals include at least a response voltage signal and a response current signal. The method further includes comparing the response voltage signal to a predetermined voltage threshold, to generate a voltage phase signal, and comparing the response current signal to a predetermined current threshold, to generate a current phase signal. The method also includes tuning at least one of the predetermined voltage threshold and the predetermined current threshold to determine a balance point, and identifying a first relative phase difference between the voltage phase signal and the current phase signal, where the first relative phase difference is indicative of characteristics of the ink corresponding to the first frequency. 1. A method for determining characteristics of an ink in an inkjet printing system , the method comprising:subjecting the ink to an alternating signal of a first frequency to generate response signals from the ink, wherein the alternating signal is one of an alternating current signal and an alternating voltage signal, and wherein the response signals include at least a response voltage signal and a response current signal, the alternating signal being generated based on a clock signal of the inkjet printing system;comparing the response voltage signal to a predetermined voltage threshold, to generate a voltage phase signal;comparing the response current signal to a predetermined current threshold, to generate a current phase signal;tuning at least one of the predetermined voltage threshold and the predetermined current threshold to determine a balance point, wherein the balance point is indicative of concurrent transition of the voltage phase signal and the current phase signal from a logical ‘low’ to a logical ‘ ...

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Номер записи: 42
25-04-2019 дата публикации

Detecting a level of printable fluid in a container

Номер: US20190118527A1
Автор: Berkeley Fisher, Daryl E. Anderson, James Michael Gardner, Michael W. Cumbie, Scott A. Linn
Принадлежит: Hewlett Packard Development Co LP

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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Номер записи: 43
25-04-2019 дата публикации

FLUID LEVEL SENSING DEPENDENT ON WRITE COMMAND

Номер: US20190118545A1
Автор: ANDERSON Daryl E., Gardner James Michael
Принадлежит: Hewlett-Packard Development Company, L.P.

In one example a fluid level sensing device is described. The device includes a sensing die having a number of fluid level sensors disposed thereon and a number of control devices, each control device corresponding to one of the number of fluid level sensors. A control device includes a comparing device to determine a state of a corresponding fluid level sensor. A state of the fluid level sensor is selected from the group consisting of a fluid state and a no fluid state. Each control device also includes a non-volatile memory device corresponding to the comparing device to indicate whether the corresponding fluid level sensor is at the fluid state or the no fluid state. A control device also includes a locking device to receive a write command and to irreversibly set the non-volatile memory device to the no fluid state based on the write command. 1. A fluid sensing device comprising:a sensing die having a number of fluid level sensors disposed thereon; a comparing device to determine a state of a corresponding fluid level sensor, wherein the state of the fluid level sensor is selected from the group consisting of a fluid state and a no fluid state;', 'a non-volatile memory device to indicate whether the corresponding fluid level sensor is at the fluid state or the no fluid state; and', receive a write command to set a state of the non-volatile memory device to the no fluid state;', 'irreversibly set the non-volatile memory device to the no fluid state based on the write command from a controller., 'a locking device to], 'a number of control devices, each control device corresponding to one of the number of fluid level sensors; each control device comprising2. The device of claim 1 , wherein the fluid is ink.3. The device of claim 1 , wherein the non-volatile memory device is a write-once memory device.4. The device of claim 1 , further comprising a sensor coupled to the comparing device.5. The device of claim 1 , further comprising the controller to:select the ...

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Номер записи: 44
05-05-2016 дата публикации

METHODS AND APPARATUS FOR PROGRAMING MEMORY OF A PRINTING CARTRIDGE

Номер: US20160125943A1
Автор: ANDERSON Daryl E., Gardner James Michael, Martin Eric T.
Принадлежит:

Methods to program a floating gate memory array include, in response to a request to program a second bit of the floating gate memory array, at a first time, outputting a programming voltage to cause a first node voltage at a first source of a first transistor corresponding to a first bit, wherein the first node voltage is greater than a second node voltage at a second source of a second transistor corresponding to the second bit. The method further includes at a second time, increasing the programming voltage of the floating gate memory array to program the second bit of the floating gate memory array. 1. A method of programming a floating gate memory array , the method comprising: at a first time, outputting a programming voltage to a first source terminal of a first transistor corresponding to a first bit to cause a first node voltage at the first source terminal of the first transistor, the first node voltage being greater than a second node voltage at a second source terminal of a second transistor corresponding to the second bit; and', 'at a second time, increasing the programming voltage of the floating gate memory array to program the second bit of the floating gate memory array., 'in response to a request to program a second bit of the floating gate memory array2. The method of claim 1 , wherein the outputting of the programming voltage at the first time includes outputting the programming voltage at a read voltage level that is applied to the floating gate memory array when reading the first bit.3. The method of claim 1 , wherein the programming voltage is progressively increased from the first time to the second time.4. The method of claim 3 , wherein the programming voltage is controlled via a voltage regulator on a printing device.5. The method of claim 3 , wherein the programming voltage is controlled to prevent parasitic current flow from programming the second bit that is not selected for programming.6. The method of claim 1 , wherein outputting the ...

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Номер записи: 45
31-07-2014 дата публикации

INKJET PRINTING SYSTEM, FLUID EJECTION SYSTEM, AND METHOD THEREOF

Номер: US20140210881A1
Автор: ANDERSON Daryl E., Ghozeil Adam L., Van Brocklin Andrew L
Принадлежит:

An inkjet printing system, fluid ejection system and method thereof are disclosed. The fluid ejection system includes a fluid ejection device and a determination module to determine a supply condition based on the count value output by the converter module. 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, 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 ejection chamber. The fluid ejection system also includes a converter module to output a count value corresponding to the voltage value output by the pressure sensor unit. 1. A fluid ejection system , comprising: a fluid supply chamber to store fluid;', 'a plurality of ejection chambers including nozzles and corresponding ejection members to selectively eject the fluid through the respective nozzles;', 'a channel to establish fluid communication between the fluid supply chamber and the ejection chambers;', '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 at least one ejection chamber; and', 'a converter module to output a count value corresponding to the voltage value output by the pressure sensor unit; and, 'a fluid ejection device includinga determination module to determine a supply condition based on the count value output by the converter module.2. The fluid ejection system according to claim 1 , wherein the determination module further comprises:a refill determination module to determine an amount of time to refill the at least one ejection chamber with the fluid from the fluid supply chamber; anda count determination module to determine the supply condition based on the count value output by the converter module and the amount of time to refill the at least one ejection chamber ...

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Номер записи: 46
02-05-2019 дата публикации

PRINTING APPARATUS AND METHODS FOR DETECTING FLUID LEVELS

Номер: US20190126631A1
Автор: ANDERSON Daryl E., Cumbie Michael W., Fisher Berkeley, Gardner James Michael, Linn Scott A.
Принадлежит:

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. 1. A printing cartridge , the printing cartridge comprising: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; anda shift register to capture fluid level information from the plurality of capacitor plates.2. The printing cartridge of claim 1 , wherein the shift register includes plurality of sensing flip-flops in circuit with the respective capacitor plates.3. The printing cartridge of claim 2 , wherein the sensing flip-flops store respective fluid level values when a voltage is provided to the shift register.4. The printing cartridge of claim 2 , wherein a sensing flip-flop stores a first fluid level value when a corresponding capacitor plate detects presence of the fluid in the fluid container claim 2 , and the sensing flip-flop stores a second fluid level value when the corresponding capacitor plate does not detect presence of the fluid in the fluid container.5. The printing cartridge of claim 1 , further including an electrical interface to map the fluid level information to a measurement.6. The printing cartridge of claim 5 , wherein the electrical interface is to:generate a signal based on the measurement; andtransmit the signal to a printer.7. The printing cartridge of claim 1 , wherein the plurality of capacitor plates detects presence of fluid in the fluid container without being in physical contact with fluid.8. A sensing die claim 1 , the sensing die comprising:a plurality of sensing flip-flops in contact with a fluid container via respective capacitor plates, each of the sensing flip-flops associated with a fluid level, the plurality of sensing flip-flops ...

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Номер записи: 47
02-05-2019 дата публикации

FLUID LEVEL SENSORS

Номер: US20190126632A1
Автор: ANDERSON Daryl E., Fisher Berkeley, Gardner James Michael, Linn Scott A.
Принадлежит: Hewlett-Packard Development Company, L.P.

In one example, a fluid level sensor includes control logic, and an array of sensing locations to detect a level of fluid in a container. The array of sensing locations include a number of memory cells located at a number of sensing locations in the array of sensing locations, a word line coupled to the memory cells, a bit line coupled to the memory cells, and a pre-charge circuit coupled to the word line and the bit line. The control logic instructs a number FETs coupled to a bit line to disconnect from a number of the memory cells, and power up the memory cells to cause the memory cells to take a first state or a second state. The control logic outputs the state of the memory cells to a Pre-charge processing device. The state of the memory cells defines the level of the fluid in the container. 1. A fluid level sensor comprising:control logic; and a number of memory cells located at a number of sensing locations in the array of sensing locations;', 'a word line coupled to the memory cells;', 'a bit line coupled to the memory cells; and', 'a pre-charge circuit coupled to the word line and the bit line;, 'an array of sensing locations to detect a level of fluid in a container comprising 'instruct a number of field effect transistors (FETs) coupled to a bit line to disconnect from a number of the memory cells;', 'the control logic topower up the memory cells, the powering up of the memory cells causing the memory cells to take a first state or a second state; andoutput the state of the memory cells to a processing device, the state of the memory cells defining the level of the fluid in the container.2. The fluid level sensor of claim 1 , wherein outputting the state of the memory cells comprises claim 1 , with the control logic:instructing a pre-charging circuit coupled to the bit line to pre-charging the memory cells to a midpoint state;instructing the pre-charging circuit to end the pre-charging of the memory cells; andinstructing the FETs to connect to the memory ...

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Номер записи: 48
23-04-2020 дата публикации

FLUDIC DIE

Номер: US20200122457A1
Автор: Anderson Daryl E, Gardner James M, Martin Eric
Принадлежит: Hewlett-Packard Development Company, L.P.

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. 1. A fluidic die comprising:an array of fluid actuators comprising a first set of fluid actuators and a second set of fluid actuators;a first power line connected to the first set of fluid actuators;a second power line connected to the second set of fluid actuators; anda third power line connected to the first set of fluid actuators.2. The fluidic die of claim 1 , wherein the first power line and the second power line comprise a first power supply line and a second power supply line claim 1 , respectively claim 1 , and wherein the third power supply line comprises a power ground line.3. The fluidic die of further comprising at least one of a diode and electrical switch electrically connected between the first power supply line and the second power supply line.4. The fluidic die of further comprising a fourth power line comprising a second power ground line claim 2 , wherein the power ground line is connected to the fluid actuators of the first set and the second power ground line is connected to the fluid actuators of the second set.5. The fluidic die of further comprising a diode electrically connected between the first power supply line and the second power supply line.6. The fluidic die of further comprising an electrical switch electrically connected between the power ground line and the second power ground line.7. The fluidic die of further comprising a second diode electrically connected between the power ground line and the second power ground line.8. The fluidic die of further comprising an electrical switch electrically connected between the first power supply line and the second power supply ...

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Номер записи: 49
23-04-2020 дата публикации

FLUID BACK PRESSURE SENSING WITH A STRAIN SENSOR

Номер: US20200122466A1
Автор: ANDERSON Daryl E., Fisher Berkeley, GARDNER James M.
Принадлежит: Hewlett-Packard Development Company, L.P.

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. 1. A fluidic die comprising:a substrate having a thin flexible region opposite a fluid supply passage within the substrate;a nozzle supported by the substrate proximate the flexible region; anda strain sensor on the flexible region of the substrate, the strain sensor to sense strain during flexing of the flexible region to sense fluid back pressure changes.2. The fluidic die of claim 1 , wherein the fluid supply passage comprises an elongate slot through the substrate and a ramped end wall that forms the flexible region and wherein the strain sensor is located beneath the ramped end wall.3. The fluidic die of claim 2 , wherein the fluid supply passage comprise a second ramped end wall forming a second flexible region claim 2 , the fluidic die further comprising a second strain sensor on the second flexible region to sense strain during flexing of the second flexible region in response to back pressure changes.4. The fluidic die of comprising an array of nozzles extending along the elongate slot.5. The fluidic die of claim 1 , wherein the fluid supply passage comprises:an elongate slot extending into the substrate, the flexible region forming a floor of the slot; anda fluid feed passage extending from the slot through the floor to the nozzle,wherein the strain sensor is supported on a side of the flexible region opposite the floor.6. The fluidic die of further comprising a second strain sensor on the flexible region of the substrate opposite the floor claim 5 , the second strain sensor to sense strain during flexing of the flexible region in response to fluid back pressure changes.7. The fluidic die of claim 1 , ...

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Номер записи: 50
10-06-2021 дата публикации

SERVICING BASED ON IMPEDANCE VALUES

Номер: US20210170749A1
Автор: ANDERSON Daryl E., Gardner James Michael, Martin Eric, Morris Jordan
Принадлежит: Hewlett-Packard Development Company, L.P.

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. 1. A fluid ejection system , comprising: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; anda service station;wherein, based on the impedance values detected, the printing system services the at least one fluid actuator.2. The fluid ejection system of claim 1 , wherein the printing system services claim 1 , at the servicing station claim 1 , the at least one fluid actuator by causing the at least one fluid ejection device to engage in a spitting process based on the impedance values detected.3. The fluid ejection system of claim 1 , wherein the printing system services the at least one fluid actuator by retracting an amount of fluid within the firing chamber and burning off the fluid with the fluid ejection device based on the impedance values detected.4. The fluid ejection system of claim 1 , wherein the printing system detects claim 1 , based on the impedance values detected claim 1 , that a pigment vehicle separation has occurred in a fluid within the firing chamber.5. The fluid ejection system of claim 4 , wherein the printing system pumps the fluid within the firing chamber using a microfluidic pump when pigment vehicle separation has occurred.6. A method of servicing a fluid ejection device claim 4 , comprising:detecting at least one impedance values during a plurality of stages ...

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Номер записи: 51
09-05-2019 дата публикации

DETECTING FLUID LEVELS USING A VOLTAGE COMPARATOR

Номер: US20190137316A1
Автор: ANDERSON Daryl E., Cumbie Michael W., Fisher Berkeley, Gardner James Michael
Принадлежит:

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. 1. A printing cartridge comprising:a fluid container;a sensing die including a plurality of sensing locations in thermal contact with the fluid container; anda 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.2. The printing cartridge of claim 1 , wherein the sensing location includes a sensing element to detect temperature and to generate the sensed voltage based on the detected temperature.3. The printing cartridge of claim 2 , wherein the sensing element is a P-N junction diode.4. The printing cartridge of claim 1 , wherein the sensing location includes a heating element to emit a heat pulse to heat the sensing die at the sensing location.5. The printing cartridge of claim 4 , wherein the heating element is a poly-silicon resistor.6. The printing cartridge of claim 1 , wherein the sensing die includes a heating element and a plurality of sensing elements positioned through the sensing die claim 1 , the position of each sensing element associated with a fluid level.7. The printing cartridge of claim 1 , further including an element manager to control when a sensing location is actuated.8. The printing cartridge of claim 7 , wherein the element manager is to:forward a heat pulse to a heating element to emit when the element manager is selected; andforward the sensed voltage from the sensing ...

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Номер записи: 52
17-06-2021 дата публикации

MICROFLUIDIC DEVICES

Номер: US20210178385A1
Автор: ANDERSON Daryl E., Corrigan III George H., GOVYADINOV Alexander
Принадлежит: Hewlett-Packard Development Company, L.P.

In one example in accordance with the present disclosure, a microfluidic device is described. The microfluidic device includes a reservoir to contain a first thermally expandable fluid, a first heater to heat the thermally expandable fluid in the reservoir, a channel extending from the reservoir and connected to the reservoir at a first opening, and a liquid volume obstructing the channel. 1. A microfluidic device comprising:a reservoir to contain a first thermally expandable fluid;a first heater to heat the thermally expandable fluid in the reservoir;a channel extending from the reservoir, the channel connected to the reservoir at a first opening; anda liquid volume to obstruct the channel.2. The device of claim 1 , wherein the first thermally expandable fluid is a gas.3. The device of claim 1 , wherein the liquid volume comprises a primer.4. The device of claim 1 , wherein the channel further comprises a first heating zone at a first temperature.5. The device of claim 4 , wherein the channel further comprises a second heating zone at a second temperature claim 4 , the first heating zone and the second heating zone being separated by an unheated portion of the channel.6. The device of claim 5 , further comprising a second reservoir containing a second thermally expandable fluid connected to a second end of the channel claim 5 , the second reservoir having a second heater claim 5 , such that alternating heating of the first reservoir and second reservoir moves the liquid volume between the first heating zone and the second heating zone based on expansion of the thermally expandable fluid in the reservoirs.7. The device of claim 6 , wherein the channel further comprises a third heating zone and the device comprises a second liquid volume in the channel separated from the first liquid volume.8. The device of claim 7 , further comprising an immiscible fluid between the first liquid volume and the second liquid volume.9. The device of claim 5 , further comprising an ...

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Номер записи: 53
17-06-2021 дата публикации

FLUIDIC DIES

Номер: US20210178756A1
Автор: ANDERSON Daryl E., Gardner James Michael, Martin Eric
Принадлежит: Hewlett-Packard Development Company, L.P.

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. 1. A fluidic die , comprising: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; anda calibration loop circuit associated with each zone to calibrate each zone based on a voltage provided by the reference temperature sensor.2. The fluidic die of claim 1 , wherein the calibration loop circuit within each zone comprises:a summing amplifier to output a voltage representative of a voltage from a zone temperature sensor;a comparator to compare the voltage from the summing amplifier with the voltage provided by the reference temperature sensor;an offset counter to change state by a value based on a difference between the voltage provided by the reference temperature sensor and the voltage from the zone temperature sensor; anda digital-to-analog converter (DAC) to convert the output of the offset counter to an offset voltage and send the offset voltage to the summing amplifier, the summing amplifier sums the offset voltage with the voltage from the zone temperature sensor,', 'the comparator compares the summed voltage with the voltage provided by the reference temperature sensor; and', 'the offset counter changes state by the value based on the comparison between the summed voltage and the voltage provided by the reference temperature sensor., 'wherein, for a number of iterations3. The fluidic die of claim 2 , comprising a sample and hold device to sample the voltage provided by the reference temperature sensor and hold a value defining the voltage provided by the reference temperature sensor ...

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Номер записи: 54
14-06-2018 дата публикации

MODULES TO IDENTIFY NOZZLE CHAMBER OPERATION

Номер: US20180162122A1
Автор: ANDERSON Daryl E., Fricke Peter James, Gardner James Michael, Martin Eric T.
Принадлежит:

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. 1. A printhead die comprising:a nozzle to be fired by a fire pulse;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 to compare the measured signal to a reference value; anda counter to count over an evaluation interval in response to the comparing indicating that an evaluation criterion is satisfied, and the counter 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.2. The printhead die of claim 1 , wherein the nozzle comprises a heater to be activated by the fire pulse claim 1 , and wherein the sensor is to measure the measured signal during an activation of the heater by the fire pulse.3. The printhead die of claim 1 , further comprising:a signal source to communicate the input signal to the fluid sample of the nozzle.4. The printhead die of claim 3 , further comprising switches to selectively couple the signal source to the fluid sample claim 3 , and couple the measured signal ...

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Номер записи: 55
21-06-2018 дата публикации

DETECT CIRCUITS FOR PRINT HEADS

Номер: US20180170034A1
Автор: ANDERSON Daryl E., Martin Eric T.
Принадлежит:

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. 1. A print head comprising: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;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; anda 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.2. The print head of claim 1 , wherein the respective detect circuit comprises:a first latch to register, for the respective nozzle, a first test result obtained based on the impedance measured for the respective nozzle at the first time instant obtained from the first time repository;a second latch to register, for the respective nozzle, a second test result obtained based on the impedance measured for the respective nozzle at the second time instant obtained from the second time repository.3. The print head of claim 1 , further comprising:a timing circuit on ...

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Номер записи: 56
22-06-2017 дата публикации

Authentication value for fluid ejection device

Номер: US20170173985A1
Автор: Daryl E. Anderson, Eric T. Martin, Huston W. Rice
Принадлежит: Hewlett Packard Development Co LP

A fluid ejection device includes a plurality of analog devices, and a storage element storing an authentication value including a plurality of bits, a first bit of the plurality of bits based on measured electrical characteristics of a first subset of the analog devices, and a second bit of the plurality of bits based on measured electrical characteristics of a second subset of the analog devices, the second subset different from the first subset.

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Номер записи: 57
28-05-2020 дата публикации

DIES INCLUDING STRAIN GAUGE SENSORS AND TEMPERATURE SENSORS

Номер: US20200164640A1
Автор: Anderson Daryl E, Berkeley Fisher, Gardner James M
Принадлежит: Hewlett-Packard Development Company, L.P.

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. 1. A die comprising:a plurality of fluid actuation devices;at least one strain gauge sensor to sense strain; andat least one temperature sensor to sense the temperature of the die to compensate for a temperature component of the sensed strain.2. The die of claim 1 , wherein the at least one strain gauge sensor comprises a piezoresistive sensor element.3. The die of claim 1 , wherein the at least one strain gauge sensor comprises three piezoresistive sensor elements in a rosette configuration.4. The die of claim 1 , wherein the at least one temperature sensor comprises a further strain gauge sensor.5. The die of claim 4 , wherein the further strain gauge sensor comprises four piezoresistive sensor elements in a Wheatstone bridge configuration co-located with the at least one strain gauge sensor claim 4 , andwherein the sensed temperature is based on the difference in the sensed strain between the at least one strain gauge sensor and the further strain gauge sensor.6. The die of claim 4 , wherein the at least one temperature sensor comprises three piezoresistive sensor elements in a rosette configuration at a location of the fluid ejection die having substantially no stress.7. A fluid ejection system comprising:a fluid ejection die comprising a plurality of actuation devices to eject fluid drops, a plurality of strain gauge sensors to sense strain within the fluid ejection die, and a plurality of temperature sensors to sense temperature within the fluid ejection die; anda controller to receive the sensed strain from each strain gauge sensor and the sensed temperature from each temperature sensor and provide a temperature compensated strain for each sensed strain based on the sensed temperatures.8. The fluid ...

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Номер записи: 58
30-06-2016 дата публикации

REPLACEABLE PRINTING COMPONENT WITH FACTORY IDENTITY CODE

Номер: US20160185123A1
Автор: ANDERSON Daryl E., Van Brocklin Andrew L., Ward Jefferson P.
Принадлежит: Hewlett-Packard Development Company, L.P.

In one example implementation, a replaceable printing component includes a fluid supply chamber, and a printhead on the fluid supply chamber. The printhead includes a memory storing a factory identification code that comprises a combination of digitized analog performance parameters. The printhead also includes electronic test components from which the analog performance parameters have been measured. 1. A replaceable printing component comprising:a fluid supply chamber;a printhead comprising a memory, a plurality of test components, and a measurement circuit disposed on the printhead to measure analog performance parameters on the plurality of test components; andan encrypted factory identification code stored in the memory that comprises a combination of digitized analog performance parameters measured on the test components.2. The replaceable printing component of claim 1 , wherein the measurement circuit comprises a digital-to-analog converter coupled to at least one test component.3. The replaceable printing component of claim 1 , wherein the plurality of test components comprise at least one of a metal resistor claim 1 , a polysilicon resistor claim 1 , a thermal resistor claim 1 , an NMOS transistor claim 1 , a PMOS transistor claim 1 , or any combination thereof.4. The replaceable printing component of claim 1 , wherein the printhead has a plurality of nozzles to eject fluid drops claim 1 , and the measurement circuit is disposed on the printhead proximate the plurality of nozzles.5. The replaceable printing component of claim 1 , wherein at least one test component is to couple to a voltage source selected from the group consisting of a band gap voltage source and a pulse-width modulated voltage source.6. The replaceable printing component of claim 1 , wherein the measurement circuit comprises a diode connected NMOS transistor to couple with a voltage source.7. The replaceable printing component of claim 1 , wherein the digitized analog performance ...

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Номер записи: 59
09-07-2015 дата публикации

REPLACEABLE PRINTING COMPONENT WITH FACTORY IDENTITY CODE

Номер: US20150191007A1
Автор: ANDERSON Daryl E., Van Brocklin Andrew L., Ward Jefferson P.
Принадлежит:

In one example implementation, a replaceable printing component includes a fluid supply chamber, and a printhead on the fluid supply chamber. The printhead includes a memory storing a factory identification code that comprises a combination of digitized analog performance parameters. The printhead also includes electronic test components from which the analog performance parameters have been measured. 1. A replaceable printing component comprising:a fluid supply chamber;a printhead having a memory and a plurality of test components;an encrypted factory identification code stored in the memory that comprises a combination of digitized analog performance parameters measured on the test components, and that has been encrypted using an encryption algorithm selected from the group consisting of RSA (Rivest-Shamir-Adleman), DSA (Digital Signature Algorithm), ECDSA (Elliptic Curve Digital Signature Algorithm), 3DES (Triple Data Encryption Algorithm) and AES (Advanced Encryption Standard); anda measurement circuit on the printhead to measure the analog performance parameters.2. (canceled)3. A replaceable printing component comprising:a fluid supply chamber;a printhead having a memory and a plurality of test components; andan encrypted factory identification code stored in the memory that comprises a combination of digitized analog performance parameters measured on the test components, and that has been encrypted using an encryption algorithm selected from the group consisting of RSA (Rivest-Shamir-Adleman), DSA (Digital Signature Algorithm), ECDSA (Elliptic Curve Digital Signature Algorithm), 3DES (Triple Data Encryption Algorithm) and AES (Advanced Encryption Standard), wherein the test components are selected from the group consisting of a metal resistor, a polysilicon resistor, a thermal resistor, a PMOS transistor, and an NMOS transistor.4. A replaceable printing component comprising:a fluid supply chamber;a printhead having a memory and a plurality of test components; ...

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Номер записи: 60
04-06-2020 дата публикации

Fault tolerant printhead

Номер: US20200171814A1
Автор: Daryl E. Anderson, Eric Martin
Принадлежит: Hewlett Packard Development Co LP

In one example, a fault-tolerant printhead includes an array of fluid actuators. Each fluid actuator includes a fault sensor to detect a faulted fluid actuator and a per-fluid actuator memory to store a fault sensor state of the fluid actuator. The fault-tolerant printhead also includes an interface to read a state of each per-fluid actuator memory.

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Номер записи: 61
11-06-2020 дата публикации

ON-DIE ACTUATOR EVALUATION WITH PRE-CHARGED THRESHOLDS

Номер: US20200180304A1
Автор: Anderson Daryl E, Gardner James Michael, Martin Eric
Принадлежит: Hewlett-Packard Development Company, L.P.

In one example in accordance with the present disclosure, a fluid ejection die is described. The die includes a number of actuator sensors disposed on the fluid ejection die to sense a characteristic of a corresponding actuator and to output a first voltage corresponding to the sensed characteristic. Each actuator sensor is coupled to a respective actuator and multiple coupled actuator sensors and actuators are grouped as primitives on the fluid ejection die. The die also includes a pre-charge device per primitive to pre-charge a corresponding threshold voltage storage device to a threshold voltage. The die also includes an actuator evaluation die per primitive to evaluate an actuator characteristic of any actuator within the primitive. Based on the first voltage and a pre-charged threshold voltage. 1. A fluid ejection die comprising: each actuator sensor is coupled to a respective actuator; and', 'multiple coupled actuator sensors and actuators are grouped as primitives on the fluid ejection die;, 'a number of actuator sensors disposed on the fluid ejection die to sense a characteristic of a corresponding actuator and output a first voltage corresponding to the sensed characteristic, whereina pre-charge device per primitive to pre-charge a corresponding threshold voltage storage device to a threshold voltage; andan actuator evaluation device per primitive to evaluate an actuator characteristic of any actuator within the primitive based on the first voltage and a pre-charged threshold voltage.2. The fluid ejection die of claim 1 , wherein the actuator evaluation device comprises:a compare device to compare the first voltage against the pre-charged threshold voltage to determine a corresponding actuator state; and store an output of the compare device; and', 'selectively pass the stored output as indicated by a control signal., 'an evaluation storage device to3. The fluid ejection die of claim 1 , wherein:the threshold voltage storage device comprises a capacitor; ...

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Номер записи: 62
11-06-2020 дата публикации

FLUID ACTUATOR EVALUATION INDEPENDENT OF ACTUATION STATE

Номер: US20200180305A1
Автор: Anderson Daryl E, Gardner James Michael, Martin Eric
Принадлежит: Hewlett-Packard Development Company, L.P.

In one example in accordance with the present disclosure, a fluidic die is described. The fluidic die includes an array of fluid actuators grouped into primitives. The fluidic die also includes a fluid actuator controller to selectively activate fluid actuators via activation data. The fluidic die also includes an array of actuator evaluators, wherein each actuator evaluator of the fluidic die is coupled to a subset of the array of fluid actuators. The actuator evaluators selectively evaluate an actuator characteristic of a selected fluid actuator based on: an output of an actuator sensor paired with the selected fluid actuator, the activation data, and an evaluation control signal. 1. A fluidic die comprising:an array of fluid actuators grouped into primitives;a fluid actuator controller to selectively actuate a subset of the array of fluid actuators;an evaluation selector to, via a selection signal, select a fluid actuator to be evaluated independent of an actuation state for the fluid actuator; and an output of an actuator sensor paired with the selected fluid actuator; and', 'a selection signal for the selected fluid actuator., 'an array of actuator evaluators, each actuator evaluator grouped with a subset of fluid actuators from the array, to evaluate an actuator state of a selected fluid actuator based on2. The fluidic die of claim 1 , wherein;a size of each primitive is variable; and an actuation data register to store actuation data that indicates fluid actuators to actuate for a set of actuation events; and', 'a mask register comprising a respective bit for each respective fluid actuator to store mask data that indicates a set of fluid actuators of the array enabled for actuation for a particular actuation event of the set of actuation events., 'the fluid actuator controller comprises;'}3. The fluidic die of claim 2 , wherein: includes an evaluation selection register that comprises a respective selection bit for each fluid actuator; and', 'is to output a ...

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Номер записи: 63
18-06-2020 дата публикации

ON-DIE ACTUATOR FAILURE DETECTION

Номер: US20200189265A1
Автор: Anderson Daryl E, Gardner James Michael, Martin Eric
Принадлежит: Hewlett-Packard Development Company, L.P.

In one example in accordance with the present disclosure, a fluid ejection die is described. The die includes a number of actuator sensors disposed on the fluid ejection die to sense a characteristic of a corresponding actuator and to alter an evaluation voltage based on a performance of the corresponding actuator. The die also includes an actuator evaluation device per primitive to detect a failed actuator based at least in part on a comparison of the altered evaluation voltage and at least one threshold voltage. The die also includes a number of disable device coupled to respective actuators and to disable failed actuators. 1. A fluid ejection die comprising: sense a characteristic of a corresponding actuator; and', 'alter an evaluation voltage based on a performance of the corresponding actuator,, 'a number of actuator sensors disposed on the fluid ejection die toan actuator evaluation device per primitive to detect a failed actuator based at least in part on a comparison of the altered evaluation voltage and at least one threshold voltage; and is coupled to a respective actuator; and', 'is to disable a failed actuator., 'a number of disable devices, wherein each disable device2. The fluid ejection die of claim 1 , wherein the actuator evaluation device:comprises a first comparator to determine when the altered evaluation voltage is greater than a high threshold voltage;comprises a second comparator to determine when the altered evaluation is less than a low threshold voltage; and greater than the high threshold voltage; and', 'less than the low threshold voltage., 'detects a failed actuator when the altered evaluation is at least one of3. The fluid ejection die of claim 2 , further comprising a maintain device to maintain the evaluation voltage between the high threshold voltage and the low threshold voltage absent a detected failure.4. The fluid ejection die of claim 1 , wherein the disable device comprises a buffer device for conditioning an activation pulse ...

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Номер записи: 64
26-07-2018 дата публикации

MODULES TO EVALUATE INK SIGNALS

Номер: US20180207931A1
Автор: ANDERSON Daryl E., Fricke Peter James, Gardner James Michael, Martin Eric T.
Принадлежит: Hewlett-Packard Development Company, L.P.

An example device in accordance with an aspect of the present disclosure includes modules to generate an input signal, apply the input signal to an ink sample to obtain an ink signal, compare the ink signal to a reference value, and identify whether the ink signal is consistent with an ink signature. A module may be contained on an inkjet printhead die. 1. A device comprising:a signal module, to generate an input signal that contains frequency content, and to apply the input signal to a fluid sample to obtain a fluid signal including a characteristic corresponding to the frequency content and associated with an evaluation interval;a comparison module to compare the fluid signal to a reference value corresponding to the characteristic; andan evaluation module to identify whether the fluid signal is consistent with a fluid signature, based on a comparison result from the comparison module, wherein the evaluation module includes a latch to determine, for the characteristic, whether the fluid signal reached the reference value;wherein the signal module is contained on a fluid dispensing die, such that the device may generate the input signal on the fluid dispensing die.2. The device of claim 1 , wherein the signal module is to obtain the fluid signal according to obtaining at least one of i) an amplitude characteristic and ii) a phase characteristic of the fluid signal claim 1 , corresponding to the frequency content of the evaluation interval.3. The device of claim 1 , further comprising a storage module to store at least one of i) a first reference value and ii) a second reference value corresponding to the evaluation interval;wherein the comparison module is to determine whether the fluid signal corresponding to the characteristic includes an amplitude corresponding to at least one of i) the first reference value and ii) the second reference value.4. The device of claim 3 , wherein the storage module comprises at least one of i) a first register and ii) a second ...

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Номер записи: 65
25-06-2020 дата публикации

Fluidic die with primitive size greater than or equal to evaluator subset

Номер: US20200198323A1
Автор: Daryl E Anderson, Eric Martin, James Michael Gardner
Принадлежит: Hewlett Packard Development Co LP

In one example in accordance with the present disclosure, a fluidic die is described. The die includes an array of fluid actuators grouped into primitives. The die also includes an array of actuator evaluators, wherein each actuator evaluator of the fluidic die is coupled to a subset of the array of fluid actuators. A fluid actuator controller groups multiple fluid actuators of the array of fluid actuators into primitives. A primitive size is greater than or equal to a lower limit threshold and the subset of the array of fluid actuators coupled to the actuator evaluation device is less than or equal to the lower limit threshold.

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Номер записи: 66
05-08-2021 дата публикации

Microfluidic devices to detect fluid priming

Номер: US20210237058A1
Автор: Alexander Govyadinov, Daryl E. Anderson, Eric Martin, James Michael Gardner
Принадлежит: Hewlett Packard Development Co LP

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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Номер записи: 67
05-08-2021 дата публикации

MICROFLUIDIC DEVICES WITH IMPEDANCE SETTING TO SET BACKPRESSURE

Номер: US20210237059A1
Автор: ANDERSON Daryl E., Gardner James Michael, Martin Eric
Принадлежит: Hewlett-Packard Development Company, L.P.

A microfluidic device may include a fluid channel defined in a substrate, an impedance sensor positioned within the fluid channel, and control logic. The control logic may force a current into the impedance sensor to sense an impedance at the location of the impedance sensor, the sensed impedance defining whether the fluid within the fluid channel is at the location of the impedance sensor, and instruct a pump device to apply a back pressure on the fluid to maintain the fluid upstream from the impedance sensor in response to a determination that the sensed impedance indicates that the fluid is located at the location of the impedance sensor. 1. A microfluidic device , comprising:a fluid channel defined in a substrate;an impedance sensor positioned within the fluid channel; and force a current into the impedance sensor to sense an impedance at the location of the impedance sensor, the sensed impedance defining whether the fluid within the fluid channel is at the location of the impedance sensor; and', 'instruct a pump device to apply a back pressure on the fluid to maintain the fluid upstream from the impedance sensor in response to a determination that the sensed impedance indicates that the fluid is located at the location of the impedance sensor., 'control logic to2. The microfluidic device of claim 1 , wherein the impedance sensor comprises:a first impedance sensor located at a first location within the fluid channel of the microfluidic device; anda second impedance sensor located at a second location within the fluid channel downstream relative to the first impedance sensor,wherein the control logic instructs the pump device to allow the fluid to move past the first impedance sensor but not past the second impedance sensor based on the detection of the fluid by the first impedance sensor and the second impedance sensor.3. The microfluidic device of claim 1 , wherein the impedance sensor comprises a single impedance sensor comprising a conductive plate with a ...

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Номер записи: 68
04-07-2019 дата публикации

Fluid ejection device and particle detector

Номер: US20190202206A1
Автор: Daryl E Anderson, Eric Martin, James Michael Gardner, Ning Ge, Steven J Simske
Принадлежит: Hewlett Packard Development Co LP

In one example in accordance with the present disclosure, a fluid ejection device is described. The fluid ejection device includes a number of nozzles to eject fluid. Each nozzle includes a firing chamber to hold fluid, a nozzle orifice through which to dispense fluid, and an ejector disposed in the firing chamber to eject fluid through the nozzle orifice. The fluid ejection device also includes a particle detector to detect the presence of foreign particles within the fluid in the firing chamber.

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Номер записи: 69
11-08-2016 дата публикации

AUTHENTICATION VALUE FOR PRINT HEAD DIE BASED ON ANALOG DEVICE ELECTRICAL CHARACTERISTICS

Номер: US20160229179A1
Автор: ANDERSON Daryl E., Martin Eric T., Rice Huston W.
Принадлежит:

A print head die includes a storage element. The print head die includes a plurality of analog devices. The storage element is to store an authentication value. The authentication value is generated based on comparisons of the measured electrical characteristics of at least some of the analog devices. 1. A fluid ejection device , comprising:a printhead die including a plurality of nominally equal analog devices; anda storage element storing an authentication value, wherein the authentication value is generated based on comparisons of the measured electrical characteristics of at least some of the analog devices.2. The fluid ejection device of wherein the electrical characteristics of at least some of the analog devices are measurable by a fluid ejection system claim 1 , and wherein the authentication value is usable by the fluid ejection system to verify an authenticity of the fluid ejection device based on measured values of the at least some of the analog devices.3. The fluid ejection device of further comprising an electrical connection to connect to a host device claim 1 , the connection being connected to the storage element to communicate the authenticity value to a host device and to the analog devices to facilitate measuring of the electrical characteristics by a host device.4. The fluid ejection device of further comprising an analog-to-digital converter coupled between the electrical connection and the analog devices to facilitate measuring the electrical characteristics claim 3 , wherein the analog-to-digital converter and the storage device are integral components of the die.5. The fluid ejection device of wherein the authentication value is generated based on comparisons of the measured electrical characteristics of pairs of the at least some of the analog devices.6. The fluid ejection device of wherein the authentication value includes a plurality of bits claim 1 , each bit to indicate a result of a comparison of the measured electrical characteristics ...

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Номер записи: 70
17-08-2017 дата публикации

WIDE ARRAY PRINTHEAD MODULE

Номер: US20170232734A1
Автор: Anderson Daryl E, Corrigan George H, Linn Scott A
Принадлежит: Hewlett-Packard Development Company, L.P.

A wide array printhead module includes a plurality of printhead die. Each of the printhead die includes a number of sensors to measure properties of a number of elements associated with the printhead die. The wide array printhead module further includes an application specific integrated circuit (ASIC) to command and control each of the printhead die. The ASIC is located off any of the printhead die. 1. A wide array printhead module comprising: 'a number of sensors to measure properties of a number of elements associated with the printhead die; and', 'a plurality of printhead die, each of the printhead die comprisingan application specific integrated circuit (ASIC) to control the sensors to measure the properties of the elements of each of the printhead die, the ASIC being located off of any of the printhead die.2. The wide array printhead module of claim 1 , in which the ASIC comprises:a number of analog-to-digital converters (ADC); andADC configuration and control (C&C) logic,in which the ADC and ADC C&C logic measure and control the properties of each of the printhead die.3. The wide array printhead module of claim 1 , in which each of the printhead die further comprise:a pass gate and control logic for the pass gate to communicate a number of signals to the ASIC via a analog bus; anda bi-directional configuration bus to transmit a number of control signals to property control elements located on each of the plurality of printhead die.4. The wide array printhead module of claim 3 , in which the number of signals are sent by the ASIC as time multiplexed signals between the plurality of printhead die to control the elements and measure the properties of the elements in zones of each of the printhead die.5. The wide array printhead module of claim 3 , in which the ASIC further comprises:a round robin state machine (RRSM) to determine which of the number of printhead die is being observed and controlled with regard to the properties of the printhead die,in which the ...

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Номер записи: 71
09-09-2021 дата публикации

CURRENT LEAKAGE TEST OF A FLUID EJECTION DIE

Номер: US20210276321A1
Автор: Anderson Daryl E, Cicili Rogelio, Gardner James Michael, Martin Eric
Принадлежит: Hewlett-Packard Development Company, L.P.

Example implementations relate to current leakage testing of a fluid ejection die. For example, a fluid ejection die may include plurality of nozzles, each nozzle among the plurality of nozzles including a nozzle sensor and a fluid ejector. The plurality of nozzle sensors may comprise a first subset and a second subset, each nozzle sensor among the plurality of nozzle sensors of the first subset may be electrically coupled to a first control line by a respective switch among a first group of switches, and each nozzle sensor among the plurality of nozzle sensors of the second subset may be electrically coupled to a second control line by a respective switch among a second group of switches. The fluid ejection die may include a control circuit to perform a current leakage test of the plurality of nozzles using the first control line and the second control line. 1. A fluid ejection die , comprising:a plurality of nozzles, each nozzle among the plurality of nozzles including a nozzle sensor and a fluid ejector;the plurality of nozzle sensors comprising a first subset and a second subset, each nozzle sensor among the plurality of nozzle sensors of the first subset electrically coupled to a first control line by a respective switch among a first group of switches, and each nozzle sensor among the plurality of nozzle sensors of the second subset electrically coupled to a second control line by a respective switch among a second group of switches; anda control circuit to perform a current leakage test of the plurality of nozzles using the first control line and the second control line.2. The fluid ejection die of claim 1 , the control circuit to create an alternating bias among the plurality of nozzle sensors using the first control line and the second control line.3. The fluid ejection die of claim 1 , each respective switch of the first group of switches including a first side electrically coupled to the respective nozzle sensor claim 1 , and a second side electrically ...

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Номер записи: 72
09-09-2021 дата публикации

DELAY ELEMENTS FOR ACTIVATION SIGNALS

Номер: US20210276324A1
Автор: Anderson Daryl E, Martin Eric
Принадлежит: Hewlett-Packard Development Company, L.P.

In some examples, a fluidic die includes a set of fluid actuators arranged in an order, and a controller to determine, based on input control information relating to controlling actuation of the plurality of fluid actuators, whether a first fluid actuator of the plurality of fluid actuators is to be actuated and whether a second fluid actuator within a specified proximity of the first fluid actuator in the order is to be actuated, and in response to determining that the first fluid actuator is to be actuated and the second fluid actuator within the specified proximity of the first fluid actuator in the order is not to be actuated, activate a delay element associated with the first fluid actuator, the delay element to delay an activation signal propagated to selected fluid actuators of the set of fluid actuators in response to an actuation event. 1. A fluidic die comprising:a set of fluid actuators arranged in an order; and determine, based on input control information relating to controlling actuation of the plurality of fluid actuators, whether a first fluid actuator of the plurality of fluid actuators is to be actuated and whether a second fluid actuator within a specified proximity of the first fluid actuator in the order is to be actuated, and', 'in response to determining that the first fluid actuator is to be actuated and the second fluid actuator within the specified proximity of the first fluid actuator in the order is not to be actuated, activate a delay element associated with the first fluid actuator, the delay element to delay an activation signal propagated to selected fluid actuators of the set of fluid actuators in response to an actuation event., 'a controller to2. The fluidic die of claim 1 , wherein the controller is to:in response to determining that the first fluid actuator is to be actuated and the second fluid actuator within the specified proximity of the first fluid actuator in the order is to be actuated, deactivate the delay element ...

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Номер записи: 73
09-09-2021 дата публикации

FLUID EJECTION DEVICES WITH INDICATORS

Номер: US20210276331A1
Автор: Anderson Daryl E, Przybyla James R
Принадлежит: Hewlett-Packard Development Company, L.P.

One example of a fluid ejection system includes a plurality of fluid ejection devices, a corresponding plurality of indicators, an operator interface, and a controller. Each indicator is on a corresponding fluid ejection device. The operator interface is to select a fluid ejection device. The controller is to turn on the corresponding indicator for the selected fluid ejection device. 1. A fluid ejection system comprising:a plurality of fluid ejection devices;a corresponding plurality of indicators, each indicator on a corresponding fluid ejection device;an operator interface to select a fluid ejection device; anda controller to turn on the corresponding indicator for the selected fluid ejection device.2. The fluid ejection system of claim 1 , wherein each indicator includes a light emitting diode.3. The fluid ejection system of claim 1 , wherein the operator interface includes a graphical user interface.4. The fluid ejection system of claim 1 , wherein each fluid ejection device includes a printhead assembly.5. The fluid ejection system of claim 1 , wherein the fluid ejection system includes an inkjet printing system.6. A fluid ejection system comprising:a plurality of fluid ejection devices;a corresponding plurality of indicators, each indicator proximate a corresponding fluid ejection device;an operator interface to select a fluid ejection device; anda controller to turn on the corresponding indicator for the selected fluid ejection device.7. The fluid ejection system of claim 6 , further comprising:at least one driver board;wherein each fluid ejection device is removably electrically coupled to the at least one driver board, andwherein each indicator is located on the at least one driver board.8. The fluid ejection system of claim 6 , wherein each indicator includes a light emitting diode.9. The fluid ejection system of claim 6 , wherein the operator interface includes a graphical user interface.10. The fluid ejection system of claim 6 , wherein each fluid ...

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Номер записи: 74
23-07-2020 дата публикации

FLUID ACTUATOR REGISTERS

Номер: US20200234092A1
Автор: ANDERSON Daryl E., Martin Eric T., Przybyla James R.
Принадлежит:

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. 1. A fluidic die comprising:an array of fluid actuators;an actuation data register to store actuation data that indicates each fluid actuator to actuate for a set of actuation events;a mask register to store mask data that indicates a set of fluid actuators of the array enabled for actuation for a respective actuation event of the set of actuation events; andactuation logic coupled to the actuation data register, the mask register, and the respective fluid actuators, the actuation logic to 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.2. The fluidic die of claim 1 , further comprising:an array of nozzles, wherein each respective nozzle of the array comprises a respective fluid actuator of the array of fluid actuators as a respective fluid ejector, and each respective fluid ejector is to actuate to thereby eject a fluid drop via the respective nozzle of the array of nozzles.3. The fluidic die of claim 1 , further comprising:an array of microfluidic channels, wherein each respective microfluidic channel of the array comprises a respective fluid actuator of the array of fluid actuators disposed therein as a respective fluid pump, and each respective fluid pump is to actuate to thereby generate fluid displacement in the respective ...

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Номер записи: 75
15-08-2019 дата публикации

FLUID EJECTION DEVICE COMBINING DRIVE BUBBLE DETECT AND THERMAL RESPONSE

Номер: US20190248131A1
Автор: Anderson Daryl E, Gardner James, Martin Eric
Принадлежит: Hewlett-Packard Development Company, L.P.

A fluid ejection device with a fluid chamber including a vaporization chamber and a thermal drive bubble formation mechanism to vaporize a portion of a fluid in the vaporization chamber to form a drive bubble in response to a firing signal during a firing operation. A drive bubble detect sensor separate from the thermal drive bubble formation mechanism and in contact with fluid in the vaporization chamber, the drive bubble detect sensor to inject a fixed current through the vaporization chamber to generate a first voltage signal representing a voltage response of the vaporization chamber and indicative of drive bubble formation during the firing operation. A thermal sensor to generate a second voltage signal indicative of a thermal response of the vaporization chamber during the firing operation, the first and second voltage signals combined being representative of an operating condition of the fluid chamber. 1. A fluid ejection device comprising: a vaporization chamber; and', 'a thermal drive bubble formation mechanism to vaporize a portion of a fluid in the vaporization chamber to form a drive bubble in response to a firing signal during a firing operation;, 'a fluid chamber includinga drive bubble detect sensor separate from the thermal drive bubble formation mechanism and in contact with fluid in the vaporization chamber, the drive bubble detect sensor to inject a fixed current through the vaporization chamber to generate a first voltage signal representing a voltage response of the vaporization chamber and indicative of drive bubble formation during the firing operation; anda thermal sensor to generate a second voltage signal indicative of a thermal response of the vaporization chamber during the firing operation, the first and second voltage signals combined being representative of an operating condition of the fluid chamber.2. The fluid ejection device of claim 1 , including: measure a voltage value of the first voltage signal at a time during the firing ...

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Номер записи: 76
14-10-2021 дата публикации

FLUIDIC DIES WITH SELECTORS ADJACENT RESPECTIVE FIRING SUBASSEMBLIES

Номер: US20210316551A1
Автор: ANDERSON Daryl E., Martin Eric, Pryzbyla James R.
Принадлежит: Hewlett-Packard Development Company, L.P.

In one example in accordance with the present disclosure, a fluidic die is described. The fluidic die includes an array of firing subassemblies grouped into zones. Each firing subassembly includes 1) a firing chamber, 2) a fluid actuator, and 3) a sensor plate. The fluidic die also includes a measurement device per zone to measure a voltage indicative of an impedance within a selected firing chamber. The fluidic die includes a selector per firing subassembly to couple a selected sensor plate to the measurement device. A selector is adjacent a respective firing subassembly and a distance between the selector and the measurement device is different as compared to other selectors. 1. A fluidic die , comprising: a firing chamber;', 'a fluid actuator disposed within the firing chamber; and', 'a sensor plate disposed within the firing chamber;, 'an array of firing subassemblies grouped into zones, each firing subassembly comprisinga measurement device per zone to measure a voltage indicative of an impedance within a selected firing chamber; and each selector is adjacent a respective firing subassembly; and', 'a distance between the selector and the measurement device is different as compared to at least one other selector., 'a selector per firing subassembly to couple a selected sensor plate to the measurement device, wherein2. The fluidic die of claim 1 , wherein the measurement device:forces a current onto the sensor plate associated with the selected firing subassembly; andreceives a signal indicative of an impedance within the selected firing chamber.3. The fluidic die of claim 1 , wherein a distance between the selector and its associated sensor plate is the same as compared to other selectors.4. The fluidic die of claim 1 , wherein:a parasitic capacitance between each selector and a respective firing subassembly is uniform; anda parasitic capacitance between each selector and the measurement device is seen by all selectors.5. The fluidic die of claim 1 , wherein a ...

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Номер записи: 77
21-10-2021 дата публикации

TEMPERATURE SENSING

Номер: US20210323301A1
Автор: ANDERSON Daryl E., Cicili Rogelio, Gardner James Michael, Martin Eric Thomas
Принадлежит: Hewlett-Packard Development Company, L.P.

Examples of a fluidic die for temperature sensing are described herein. In some examples, the fluidic die includes a plurality of resistor segments connected in series. In some examples, the fluidic die may include a plurality of first switches connected to a first side of each of the plurality of resistor segments. In some examples, the fluidic die includes a plurality of second switches connected to a second side of each of the plurality of resistor segments. In some examples, the fluidic die includes a differential amplifier to output a temperature voltage signal, where a first input of the differential amplifier is each of the first switches, and where a second input of the differential amplifier is connected each of the plurality of second switches. 1. A fluidic die for temperature sensing , comprising:a plurality of resistor segments connected in series;a plurality of first switches, wherein a first terminal of each of the first switches is connected to a first side of each of the plurality of resistor segments;a plurality of second switches, wherein a first terminal of each of the second switches is connected to a second side of each of the plurality of resistor segments; anda differential amplifier to output a temperature voltage signal, wherein a first input of the differential amplifier is connected to a second terminal of each of the first switches, and wherein a second input of the differential amplifier is connected to a second terminal of each of the plurality of second switches.2. The fluidic die of claim 1 , wherein each of the resistor segments corresponds to a thermal zone and the differential amplifier is a single differential amplifier to output a differential voltage for each of the thermal zones.3. The fluidic die of claim 1 , further comprising a single current source to drive the plurality of resistor segments.4. The fluidic die of claim 1 , wherein a first switch of the plurality of first switches and a second switch of the plurality of ...

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Номер записи: 78
22-08-2019 дата публикации

LOW VOLTAGE BIAS OF NOZZLE SENSORS

Номер: US20190255837A1
Автор: Anderson Daryl E, Gardner James Michael, Martin Eric
Принадлежит: Hewlett-Packard Development Company, L.P.

Example implementations relate to low voltage bias of nozzle sensors. For example, a fluid ejection die according to the present disclosure may include a plurality of nozzles, and each nozzle may include a nozzle sensor and a fluid ejector, among other components. The fluid ejection die may also include a voltage reduction device to maintain a low voltage bias on the plurality of nozzle sensors during an operation of the plurality of nozzles. A plurality of sense circuits may be electrically coupled to a respective nozzle sensor among the plurality of nozzle sensors, and each sense circuit may evaluate a status of the respective nozzle after the operation. 1. A fluid ejection die comprising:a plurality of nozzles, each nozzle among the plurality of nozzles including a nozzle sensor and a fluid ejector;a voltage reduction device to maintain a low voltage bias on the plurality of nozzle sensors during an operation of the plurality of nozzles; anda plurality of sense circuits, each sense circuit among the plurality of sense circuits electrically coupled to a respective nozzle sensor among the plurality of nozzle sensors, each sense circuit to evaluate a status of the respective nozzle after the operation.2. The fluid ejection die of claim 1 , the voltage reduction device including a control line claim 1 , each nozzle sensor among the plurality of nozzle sensors electrically coupled to the control line by a respective switch among a plurality of switches.3. The fluid ejection die of claim 1 , the voltage reduction device including a control line claim 1 , a first side of a switch electrically coupled to a nozzle sensor among the plurality of nozzle sensors claim 1 , a second side of the switch electrically coupled to a low supply voltage claim 1 , and a gate of the switch electrically coupled to the control line.4. The fluid ejection die of claim 1 , the voltage reduction device including a control line claim 1 , each nozzle sensor among the plurality of nozzle sensors ...

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Номер записи: 79
29-09-2016 дата публикации

INKJET PRINTHEAD DEVICE, FLUID EJECTION DEVICE, AND METHOD THEREOF

Номер: US20160279931A1
Автор: ANDERSON Daryl E., Ghozeil Adam L., Van Brocklin Andrew L.
Принадлежит: Hewlett-Packard Development Company, L.P.

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. 1. A fluid ejection device , comprising:a plurality of ejection chambers comprising nozzles and corresponding ejection members to selectively eject a fluid through the respective nozzles, wherein a diameter of a first nozzle in a first ejection chamber is greater than a diameter of a second nozzle in a second ejection chamber.2. The fluid ejection device of claim 1 , further comprising a pressure sensor in the first ejection chamber.3. The fluid ejection device of claim 2 , wherein the pressure sensor is a ABD MEMS pressure sensor.4. The fluid ejection device of claim 3 , wherein the pressure sensor produces a potential based on the amount of pressure applied to a pressure plate.5. The fluid ejection device of claim 4 , wherein the potential is measured relative to a firing electrode.6. The fluid ejection device of claim 4 , wherein the potential is measured relative to ground.7. The fluid ejection device of claim 1 , wherein the pressure sensor is located on a surface opposite the first nozzle in the first ejection chamber.8. An inkjet printhead device capable of measuring the size of an ejector bubble over time claim 1 , the device comprising:a plurality of ejection chambers comprising nozzles and corresponding ejection members to selectively eject the fluid through the respective nozzles;an electrode in a first ejection chamber;a counter-electrode;a comparator detecting a ...

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Номер записи: 80
25-11-2021 дата публикации

ZONE-BASED FIRING SIGNAL ADJUSTMENT

Номер: US20210362490A1
Автор: ANDERSON Daryl E., Martin Eric
Принадлежит: Hewlett-Packard Development Company, L.P.

In one example in accordance with the present disclosure, a fluidic die is described. The fluidic die includes a number of zones. Each zone includes a number of sets, each set including a number of fluidic devices. Each fluidic device includes a fluid chamber and a fluid actuator disposed in the chamber. Each fluidic device also includes a sensor to sense a characteristic of the zone and a register to hold an adjustment value that indicates how much to adjust a firing signal in the zone. A delay device per set delays the firing signal at a corresponding set. An adjustment device per set generates an adjusted firing signal based on the adjustment value, a delayed firing signal corresponding to the set, and at least one delayed firing signal received from another set. The delayed firing signals from different sets are time shifted relative to one another. 1. A fluidic die , comprising: a number of sets, each set comprising a number of fluidic devices, each fluidic device comprising a fluid chamber and a fluid actuator disposed in the fluid chamber;', 'a sensor to sense a characteristic of the zone;', 'a register to hold an adjustment value which indicates how much to adjust a firing signal in the zone;, 'a number of zones, each zone comprisinga delay device per set to delay the firing signal at a corresponding set; and the adjustment value;', 'a delayed firing signal corresponding to the set; and', 'at least one delayed firing signal received from another set, wherein delayed firing signals from different sets are time shifted relative to one another., 'an adjustment device per set to generate an adjusted firing signal based on2. The fluidic die of claim 1 , wherein:the sensor is a temperature sensor; andthe adjustment value is based on a sensed temperature.3. The fluidic die of claim 1 , wherein each delay device passes a corresponding delayed fire signal to at least one of:multiple upstream sets; andmultiple downstream sets.4. The fluidic die of claim 1 , wherein ...

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Номер записи: 81
25-11-2021 дата публикации

TEMPERATURE SENSING

Номер: US20210362492A1
Автор: ANDERSON Daryl E., Cicili Rogelio, Gardner James Michael, Martin Eric Thomas
Принадлежит: Hewlett-Packard Development Company, L.P.

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. 1. A fluidic die for temperature sensing , comprising:a plurality of thermal sense modules, wherein each of the thermal sense modules comprises a diode connected between a first switch and a second switch; anda differential amplifier to output a temperature voltage signal, wherein 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.2. The fluidic die of claim 1 , wherein each of the thermal sense modules corresponds to a thermal zone and the differential amplifier is a single differential amplifier to output a differential voltage for each of the thermal zones.3. The fluidic die of claim 1 , further comprising a single current source to drive the plurality of thermal sense modules.4. The fluidic die of claim 1 , wherein each of the thermal sense modules comprises a selection switch to be activated to force a current through the diode.5. The fluidic die of claim 1 , comprising multiple diodes connected between the first switch and the second switch claim 1 , and a second diode connected between the second switch and ground.6. The fluidic die of claim 1 , further comprising a fluidic actuator and a fluid chamber for each of the plurality of thermal sense modules.7 ...

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Номер записи: 82
15-10-2015 дата публикации

METHOD AND SYSTEM TO STORE DROP COUNTS

Номер: US20150290932A1
Автор: ANDERSON Daryl E., Gardner James Michael, Van Brocklin Andrew L.
Принадлежит:

An exemplary embodiment of the present technique may include a method including monitoring a number of drops of ink released by a print head of a printing device. The method may also include associating the number of drops of ink with a quanta of charge. The method may also include storing the associated quanta of charge in a memory cell of a programmable read-only memory (PROM) device. 1. A method , comprising:monitoring a number of drops of ink released by a print head of a printing device;associating the number of drops of ink with a quanta of charge; andstoring the associated quanta of charge in a memory cell of a programmable read-only memory (PROM) device.2. The method of claim 1 , further comprising comparing the stored quanta of charge to a value associated with a predetermined number of drops of ink to determine the number of drops of ink released by the print head.3. The method of claim 2 , further comprising converting the stored quanta of charge to a digital signal at an analog to digital conversion (ADC) device claim 2 , wherein the value is a digital value.4. The method of claim 1 , wherein the quanta of charge in the memory cell decays over time claim 1 , further comprising:comparing the memory cell to a reference cell of a reference PROM device to determine the rate of decay of the memory cell; andverifying the quanta of charge of the memory cell based on the comparison to the reference cell.5. A system claim 1 , comprising:a printing device to enable a number of drops of ink released by a print head of the printing device to be determined;a storage device, the storage device to store instructions for determining the ink drop counts; and monitor a number of drops of ink released by the print head;', 'associate the number of drops of ink with a quanta of charge; and', 'store the associated quanta of charge in a memory cell of a programmable read-only memory (PROM) device., 'a processor of the printing device that executes the stored instructions to6. ...

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Номер записи: 83
19-10-2017 дата публикации

Printing device

Номер: US20170297328A1
Автор: Daryl E Anderson, Eric T Martin, James Gardner
Принадлежит: Hewlett Packard Development Co LP

A method of operating a printing device during a power loss event includes, with a power loss protection supply voltage generator coupled to a printhead driving circuit, maintaining a power loss protection supply voltage (V DD— plp) to the printhead driving circuit until a high voltage power supply (V PP ) to the high voltage devices drops below a threshold voltage.

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Номер записи: 84
26-10-2017 дата публикации

PRINTING DEVICE

Номер: US20170305150A1
Автор: Anderson Daryl E, Gardner James, Martin Eric T
Принадлежит: Hewlett-Packard Development Company, L.P.

A method of operating a printing device during a power loss event includes, with a power loss detection device, detecting an power loss to a number of high voltage devices. The method further includes, with a voltage regulator coupled to printhead fire control circuitry, maintaining a power loss protection supply voltage (Vplp) to the printhead fire control circuitry. 1. A circuit topology for a printing device , comprising:{'sub': 'PP', 'a high voltage power source (V) connected to a number of high voltage devices used to fire a number of printheads;'}a power loss detection device to detect a power loss to the printing device;{'sub': DD', '_', 'DD', '_, 'a voltage regulator to regulate an input voltage to produce a power loss protection supply voltage (Vplp), Vplp being provided to printhead fire control circuitry if the power loss detection device detects a power loss to the printing device, the printhead fire control circuitry to control current in the high voltage devices.'}2. The circuit topology of claim 1 , in which the Vplp voltage is generated on a printhead die claim 1 , Vplp voltage being derived from V.3. The circuit topology of claim 1 , in which Vplp is generated on a printhead die claim 1 , Vplp voltage being derived from a Vlogic power source (Vlogic) associated with V.4. The circuit topology of claim 1 , in which power loss is determined to have occurred if the power loss detection device detects a Vpower source used to power a number of low voltage circuits drops below a first threshold and Vis above a second threshold.5. The circuit topology of claim 1 , in which controlling current in the high voltage device with the printhead fire control circuitry comprises powering all printhead fire control circuitry until Vis below a discharge threshold.6. The circuit topology of :{'sub': DD', '_', 'DD, 'in which the Vplp voltage is generated on the die of the printheads using an external voltage power source (V), and'}{'sub': DD', 'PP, 'in which power loss ...

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Номер записи: 85
24-09-2020 дата публикации

Fluid particle concentration detection

Номер: US20200298559A1
Автор: Daryl E. Anderson, Eric Martin
Принадлежит: Hewlett Packard Development Co LP

A fluidic die may include at least one fluidic passageway, at least one electrode disposed within the at least one fluidic passageway, and control circuitry to activate the electrode within the fluidic die. An impedance sensed at the electrode corresponds to a particle concentration within the fluid. The control circuitry activates the electrode during a separate pulse group assigned to the activation of the electrode among at least one other pulse group assigned to an activation of at least one fluid actuator within a column group.

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Номер записи: 86
24-09-2020 дата публикации

FLUID RESERVOIR IMPEDANCE SENSORS

Номер: US20200298584A1
Автор: Anderson Daryl E, Castle Steven T, Gardner James Michael, Martin Eric
Принадлежит: Hewlett-Packard Development Company, L.P.

A fluid reservoir () includes a circuit () extending in the fluid reservoir to be at least partially in contact with fluid () inside the fluid reservoir during use, at least a first impedance sensor () and second impedance sensor () coupled to the circuit, wherein the at least first and second impedance sensors are to output impedance values indicative of a degree of particle separation in the fluid. 1. A fluid reservoir , comprising:a circuit extending in the fluid reservoir to be at least partially in contact with fluid inside the fluid reservoir during use;at least a first impedance sensor and second impedance sensor coupled to the circuit;wherein the at least first and second impedance sensors are to output impedance values indicative of a degree of particle separation in the fluid.2. The fluid reservoir of claim 1 , the circuit further comprising an evaluator module to evaluate the sensed degree of pigment separation in the fluid from each of the at least first and second impedance sensors.3. The fluid reservoir of claim 2 , where the comparator is to provide results of the comparison to a processing device associated with the fluid reservoir and wherein the processing device is to initiate a fluid stirring process in the fluid container.4. The fluid reservoir of claim 2 , the circuit comprising at least a third impedance sensor the third sensor placed intermittent between the first and second sensor claim 2 , wherein the evaluator module is to:evaluate the sensed degree of pigment separation in the fluid also from the third sensor, anddisregard a sensed impedance representative of no contact with the fluid when at least one of the first, second, and third impedance sensors are not in contact with the fluid.5. The fluid reservoir of claim 1 , further comprising a fluid level sensor within the fluid reservoir.6. The fluid reservoir of claim 5 , the circuit comprising an evaluator module to:evaluate the sensed degree of pigment separation in the fluid from each ...

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Номер записи: 87
01-10-2020 дата публикации

Printing agent containers

Номер: US20200307233A1
Автор: Daryl E. Anderson, James Michael Gardner
Принадлежит: Hewlett Packard Development Co LP

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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Номер записи: 88
08-10-2020 дата публикации

Setpoint registers to adjust firing pulses

Номер: US20200316937A1
Автор: Daryl E. Anderson, Eric Martin, James Michael Gardner
Принадлежит: Hewlett Packard Development Co LP

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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Номер записи: 89
15-10-2020 дата публикации

FLUID LEVEL SENSING INDEPENDENT OF WRITE COMMAND

Номер: US20200324554A1
Автор: ANDERSON Daryl E., Gardner James Michael
Принадлежит: Hewlett-Packard Development Company, L.P.

In one example a fluid level sensing device is described. The device includes a sensing die having a number of fluid level sensors disposed thereon and a number of control devices, each control device corresponding to one of the number of fluid level sensors. A control device includes a comparing device to determine a state of a corresponding fluid level sensor. A state of the fluid level sensor is selected from the group consisting of a fluid state and a no-fluid state. Each control device also includes a non-volatile memory device corresponding to the comparing device to indicate whether the corresponding fluid level sensor is at the fluid state or the no-fluid state. A control device also includes a locking device to irreversibly set the non-volatile memory device to the no-fluid state independent of a write command from a controller. 1. A fluid sensing device comprising:a sensing die having a number of fluid level sensors disposed thereon; a comparing device to determine a state of a corresponding fluid level sensor, wherein the state of the fluid level sensor is selected from the group consisting of a fluid state and a no fluid state;', 'a non-volatile memory device to indicate whether the corresponding fluid level sensor is at the fluid state or the no fluid state; and', 'a locking device to irreversibly set the non-volatile memory device to the no fluid state independent of a write command from a controller., 'a number of control devices, each control device corresponding to one of the number of fluid level sensors; each control device comprising2. The device of claim 1 , wherein the fluid is ink.3. The device of claim 1 , wherein the non-volatile memory device is a write-once memory device.4. The device of claim 1 , further comprising a sensor coupled to the comparing device.5. The device of claim 1 , further comprising the controller to:select the corresponding fluid level sensor for evaluation; andprovide a threshold value to facilitate detecting whether ...

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Номер записи: 90
07-12-2017 дата публикации

IMPEDANCE MEASUREMENTS AT TIME INSTANTS

Номер: US20170348968A1
Автор: ANDERSON Daryl E., Fricke Peter James, Martin Eric T.
Принадлежит:

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. 1. A print head comprising: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; anda detector to determine a first time instant following the delayed fire pulse for registering a first impedance measurement by the sensor.2. The print head of claim 1 , wherein the detector is to determine a second time instant following the delayed fire pulse for registering a second impedance measurement by the sensor.3. The print head of claim 1 , wherein the detector comprises a latch claim 1 , and the detector is to register the first impedance measurement by storing claim 1 , in the latch claim 1 , a result responsive to the first impedance measurement.4. The print head of claim 1 , wherein the nozzle upon activation in response to the delayed fire pulse generates a drive bubble claim 1 , and the detector is to:compare a voltage corresponding to the first impedance measurement with a threshold voltage; andobtain a first test result based on the comparing, the first test result to indicate whether the drive bubble is present within the nozzle at the first time instant.5. The print head of claim 4 , wherein the detector is to:determine a second time instant following the delayed fire pulse for registering a second impedance measurement by the sensor;further compare a voltage corresponding to the second impedance measurement with the threshold voltage; andobtain a second test result based on the further comparing, the second test result to indicate whether the drive bubble has collapsed within the nozzle by the second time instant.6. The print head of claim 1 , further comprising: ...

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Номер записи: 91
29-10-2020 дата публикации

ON-DIE ACTUATOR DISABLING

Номер: US20200338883A1
Автор: Anderson Daryl E, Gardner James Michael, Martin Eric
Принадлежит: Hewlett-Packard Development Company, L.P.

In one example in accordance with the present disclosure, a fluid ejection die is described. The die includes a number of actuator sensors disposed on the fluid ejection die to sense a characteristic of a corresponding actuator. Each actuator sensor is coupled to a respective actuator and multiple coupled actuator sensors and actuators are grouped as primitives on the fluid ejection die. The die also includes an actuator evaluation die per primitive to evaluate an actuator characteristic of any actuator within the primitive. The die also includes a number of disable devices. Each disable device 1) is coupled to a respective actuator of the number of actuators and 2) disables a corresponding actuator when the corresponding actuator is determined to be malfunctioning. 1. A fluid ejection die comprising: each actuator sensor is coupled to a respective actuator; and', 'multiple coupled actuator sensors and actuators are grouped as primitives on the fluid ejection die;, 'a number of actuator sensors disposed on the fluid ejection die to sense a characteristic of a corresponding actuator, whereinan actuator evaluation device per primitive to evaluate an actuator characteristic of any actuator within the primitive; and is coupled to a respective actuator; and', 'is to disable a corresponding actuator when the corresponding actuator is determined to be malfunctioning., 'a number of disable devices, wherein each disable device2. The fluid ejection die of claim 1 , further comprising a number of forwarding devices to selectively forward an activation signal originally directed towards a first actuator to a second actuator claim 1 , when the first actuator is determined to be malfunctioning claim 1 , wherein each forwarding device is coupled to a respective actuator.3. The fluid ejection die of claim 2 , wherein the forwarding device comprises:a forwarding storage device unique to the first actuator to selectively store an output of the actuator evaluation device regarding a ...

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Номер записи: 92
14-12-2017 дата публикации

Fluidic die

Номер: US20170355188A1
Автор: Daryl E. Anderson, George H. Corrigan, Scott A. Linn
Принадлежит: Hewlett Packard Development Co LP

A fluidic die includes a number of sensors to measure properties of a number of property control elements associated with the printhead die, a pass gate to communicate a number of signals to an application specific integrated circuit (ASIC) via an analog bus using control logic associated with the pass gate, and a bi-directional configuration bus coupled to the fluidic die to transmit a number of control signals to property control elements located on the fluidic die.

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Номер записи: 93
14-11-2019 дата публикации

Fluid Ejection Device With Nozzle Column Data Groups Including Drive Bubble Detect Data

Номер: US20190344570A1
Автор: Anderson Daryl E, Gardner James, Martin Eric
Принадлежит: Hewlett-Packard Development Company, L.P.

A fluid ejection device including a plurality of primitives each having a same set of addresses and including a plurality of fluid chambers, each fluid chamber corresponding to a different address of the set of addresses and including a firing mechanism. Input logic receives a series of fire pulse groups, each fire pulse group corresponding to an address of the set of addresses and including warming data having an enable value or a disable value and a series of firing bits, each firing bit corresponding to a different primitive and having a firing value or a non-firing value. For each firing bit of each fire pulse group, when the warming data has the enable value, activation logic provides a warming pulse to the firing mechanism of the fluid chamber corresponding to the firing bit when the firing bit has the non-firing value. 1. A fluid ejection device comprising: a drive bubble formation mechanism; and', 'a drive bubble detect (DBD) mechanism;, 'a number of ejection chambers, each corresponding to a different address of the set of addresses and including, 'a number of primitives, each receiving a same set of addresses and includinginput logic receiving nozzle column data groups (NCG), each NCG including fire pulse groups (FPG), each FPG including DBD data having an enable value or disable value and ejection data bits, each ejection data bit corresponding to a different one of the primitives; identify the FPG as a DBD FPG when the DBD data has the enable value, the DBD FPG corresponding to at least one address of the set of addresses; and', 'activate in each primitive the drive bubble formation mechanism and the DBD mechanism of the ejection chamber having the same address as the at least one address to which the DBD FPG corresponds to form a drive bubble and to perform a DBD sensing measurement if the corresponding ejection data bit is set., 'activation logic, for each FPG of each NCG, to2. The fluid ejection device of claim 1 , the activation logic including a DBD ...

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Номер записи: 94
05-11-2020 дата публикации

FLUID RESERVOIRS

Номер: US20200346467A1
Автор: ANDERSON Daryl E., Castle Steven T., Koll Andrew
Принадлежит: Hewlett-Packard Development Company, L.P.

A fluid reservoir may include a fluid chamber to contain a fluid, and an impedance sensor exposed to a fluid within the fluid chamber. The impedance sensor senses an impedance at the impedance sensor, determines a particle vehicle separation level of the fluid within the fluid chamber based on the sensed impedance, and sends an activation signal to a moveable carriage to which the fluid reservoir is coupled to stir the fluid within the fluid reservoir based on the sensed impedance. 1. A fluid reservoir comprising:a fluid chamber to contain a fluid; and sense an impedance at the impedance sensor;', 'determine a particle vehicle separation level of the fluid within the fluid chamber based on the sensed impedance; and', 'send an activation signal to a moveable carriage to which the fluid reservoir is coupled to stir the fluid within the fluid reservoir based on the sensed impedance., 'an impedance sensor exposed to a fluid within the fluid chamber to2. The fluid reservoir of claim 1 , wherein:the activation signal is sent in response to a determination that the sensed impedance indicates particle vehicle separation above a threshold; andthe activation signal is not sent in response to a determination that the sensed impedance indicates particle vehicle separation below the threshold.3. The fluid reservoir of claim 1 , wherein the particle vehicle separation level of the fluid is defined by an impedance value based on the sensed impedance claim 1 , and wherein:a relatively lower impedance corresponds to a higher particle concentration within the fluid; anda relatively higher impedance corresponds to a lower particle concentration within the fluid.4. The fluid reservoir of claim 1 , comprising:a sensing die extending through a level of fluid in the reservoir; anda first impedance sensor and a second impedance sensor coupled to the sensing die at different portions of the sensing die to sense a degree of pigment separation in the fluid at different levels of the fluid.5. ...

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Номер записи: 95
21-12-2017 дата публикации

NOZZLE CONDITION EVALUATION

Номер: US20170361603A1
Автор: ANDERSON Daryl E., Martin Eric T.
Принадлежит:

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. 1. A print head comprising: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; anda result-ready register to store a status indication set to a predetermined value responsive to storing of the DBD test result in the test result register, wherein 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.2. The print head of claim 1 , further comprising:a DBD module to perform DBD tests of the plurality of nozzles, and to store the DBD test result in the test result register and store the status indication in the result-ready register.3. The print head of claim 1 , wherein the DBD module is to:determine, based on the DBD tests, that the first nozzle from among the plurality of nozzles has failed; andstore the DBD test result for the first nozzle in the test result register responsive to determining that the first nozzle has failed.4. The print head of claim 3 , wherein the DBD module is to:determine, based on the DBD tests, that a second nozzle from among the plurality of nozzles has not failed; anddecline to store a DBD test result for the second nozzle in the test result register responsive to determining that the second nozzle has not failed.5. The print head of claim 3 , wherein the DBD ...

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Номер записи: 96
05-11-2020 дата публикации

STORING MEASUREMENTS OF NOZZLE CONDITIONS

Номер: US20200348155A1
Автор: ANDERSON Daryl E., Martin Eric
Принадлежит:

In some examples, a fluid dispensing device includes storage elements, and a switch assembly comprising switches controllable by control signals responsive to a given fire event that activates a nozzle of the fluid dispensing device to provide a first sense measurement of a first condition of the nozzle to a first storage element of the storage elements, and provide a second sense measurement of a different second condition of the nozzle to a second storage element of the storage elements. 1. A fluid dispensing device comprising:storage elements; and provide a first sense measurement of a first condition of the nozzle to a first storage element of the storage elements, and', 'provide a second sense measurement of a different second condition of the nozzle to a second storage element of the storage elements., 'a switch assembly comprising switches controllable by control signals responsive to a given fire event that activates a nozzle of the fluid dispensing device to2. The fluid dispensing device of claim 1 , wherein the switches comprise a first switch and a second switch claim 1 , and the control signals are to activate the first switch while maintaining the second switch inactive to provide the first sense measurement to the first storage element claim 1 , and activate the second switch while maintaining the first switch inactive to provide the second sense measurement to the second storage element.3. The fluid dispensing device of claim 1 , further comprising:an analog-to-digital converter to convert the first sense measurement or the second sense measurement into digital data,wherein the switches are selectively activatable by the control signals to alternately couple the first sense measurement stored in the first storage element to an input of the analog-to-digital converter and the second sense measurement stored in the second storage element to the input of the analog-to-digital converter.4. The fluid dispensing device of claim 1 , further comprising:a ...

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Номер записи: 97
26-11-2020 дата публикации

Fluid Ejection Device With Nozzle Column Data Groups Including Drive Bubble Detect Data

Номер: US20200369035A1
Автор: Anderson Daryl E, Gardner James, Martin Eric
Принадлежит: Hewlett-Packard Development Company, L.P.

A fluid ejection device includes a number of primitives, each receiving a same set of addresses and including a number of ejection chambers, each corresponding to a different address of the set of addresses and including a drive bubble formation mechanism and a drive bubble detect (DBD) mechanism. Input logic receives nozzle column data groups (NCG), each NCG including fire pulse groups (FPG), each FPG including DBD data having an enable value or disable value, and ejection data bits, each ejection data bit corresponding to a different one of the primitives. For each FPG of each NCG, activation logic identifies the FPG as a DBD FPG when the DBD data has the enable value and activates in each primitive the drive bubble formation mechanism and the DBD mechanism identified by the DBD FPG to perform a DBD measurement. 115.-. (canceled)16. A fluid ejection device comprising:a number of primitives having a number of ejection chambers;mechanisms for drive bubble formation and drive bubble detection (DBD) associated with the number of ejection chambers;an input logic to receive signals indicative of drive bubble formation and DBD in a single stream from an external controller; andthe fluid ejection device to cause drive bubble formation for a subset of ejection chambers concurrently with DBD of one or more of the number of ejection chambers.17. The fluid ejection device of further comprising nozzles associated with the number of ejection chambers and wherein the to be received signals indicative of drive bubble formation and DBD are to cause ejection of printing fluid via the nozzles.18. The fluid ejection device of claim 17 , wherein the mechanisms for DBD are to monitor formation and collapse of drive bubbles responsive to the to be received signals indicative of drive bubble formation and DBD.19. The fluid ejection device of claim 18 , wherein monitoring of drive bubble formation and collapse is to be based on a voltage measurement at the mechanisms for DBD.20. The fluid ...

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Номер записи: 98
05-12-2019 дата публикации

NOZZLE SENSOR EVALUATION

Номер: US20190366707A1
Автор: Anderson Daryl E, Gardner James Michael, Martin Eric
Принадлежит: Hewlett-Packard Development Company, L.P.

A fluid ejection die including a plurality of drive bubble devices, a sensor operatively connected to each drive bubble device, and a current source connected to each sensor. Furthermore, the fluid ejection die may include an evaluation logic connected to each sensor and an impedance element. The evaluation logic can be configured to selectively connect the current source, through the impedance element, to the sensor. 1. A fluid ejection die comprising:a plurality of drive bubble devices; a sensor operatively connected to each drive bubble device of the plurality of drive bubble devices;a current source connected to each sensor; andan evaluation logic connected to each sensor, each evaluation logic comprising an impedance element, each evaluation logic configured to selectively connect the current source through the impedance element to each sensor.2. The fluid ejection die of claim 1 , wherein the evaluation logic claim 1 , further comprises a capacitance device connected to the impedance element in parallel.3. The fluid ejection die of claim 1 , wherein the evaluation logic comprises:a first switch to selectively connect the current source to ground; anda second switch to selectively connect the current source through the impedance element to the sensor.4. The fluid ejection die of claim 3 , wherein the evaluation logic further comprises:a third switch connected to the second switch and the sensor; anda fourth switch connected to the third switch and the impedance element.5. The fluid ejection die of claim 4 , wherein the evaluation logic can selectively connect the current source through the impedance element to the sensor by:opening the first switch;closing the second switch;closing the third switch; andclosing the fourth switch to detect one or more voltage responses, andbased on the one or more voltage responses, determine a state of operability of the current source.6. The fluid ejection die of claim 4 , wherein the evaluation logic can selectively connect ...

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Номер записи: 99
05-12-2019 дата публикации

Nozzle sensor protection

Номер: US20190366708A1
Автор: Daryl E Anderson, Eric Martin, James Michael Gardner
Принадлежит: Hewlett Packard Development Co LP

A fluid ejection die that may include a drive bubble device, a sensor and a sensor control logic. The drive bubble device can include a fluid ejector. Furthermore, the sensor can be operatively connected to the drive bubble device and the sensor control logic can be operatively connected to the sensor. Moreover, the sensor control logic can include a protective circuitry that can be operatively connected between the sensor control logic and the drive bubble device. The protective circuitry can be configured to shunt excess portions of a signal transmitted from the sensor to protect a circuit path to a DBD control circuit.

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Номер записи: 100