Hewlett-packard Development Company, L.p.

Hewlett-packard Company

Other

Samsung Electronics Co., Ltd.

Hewlett Packard Enterprise Development LP

Hewlett-packard Development, L.p.

Adam L Ghozeil

Andrew L Van Brocklin

Eric T Martin

Ning Ge

Daryl E Anderson

Arthur Piehl

Scott A Linn

James Richard Przybyla

Jeffery S Beck

Peter James Fricke

David Maxfield

Donald W Schulte

Chris Bakker

Chaw Sing Ho

Patrick Leonard

Winthrop D Childers

James William Stasiak

Kevin Francis Peters

Mark Hunter

Michael J Barbour

Galen H Kawamoto

Paul A Liebert

Alexander N Govyadinov

James Michael Gardner

Trudy L Benjamin

David Alvin Tyvoll

Lawrence H White

Boon Bing Ng

Terry E McMahon

James A Feinn

Douglas A Sexton

Paul Crivelli

Dennis J Schloeman

Timothy R Emery

Satya Prakash

John Stephen Dunfield

Victorio Chavarria

Matthew J Gelhaus

Ted W Barnes

Grant Pease

Art Piehl

William J Sudyka

Michael W Cumbie

Jianhua Yang

Mark H MacKenzie

Brent Buchanan

Nathan McPherson Moroney

Sterling Chaffins

Michael A Pate

George H Corrigan

Anthony M Fuller

Chantelle Domingue

Robert N K Browning

Bradley D Chung

Andrew F Phillips

Galen P Cook

Richard I Klaus

Will Allen

Andrew L VanBrocklin

Jim Przybyla

Raymond Connolly

Bee Ling Peh

Eugene J Mar

Kenneth Hickey

Leslie Louis Szepesi

Valerie J Marty

Jeffrey Steven Beck

Matthew P Heineck

Bjorn Warloe

Riccardo Maggi

Michael H Hayes

Rohit Kumar Gupta

Rohit Gupta

Mark H Mackenzie

Chantelle Elizabeth Domingue

Eric Martin

A printhead includes an address line, data lines, a fire pulse line, and a plurality of primitives, each primitive corresponding to a different data line and including a plurality of activation devices, each activation device corresponding to a different address of a set of addresses. A buffer receives data packets, each data packet including address data representative of an address of the set of addresses and print data for each primitive corresponding to the address. For each data packet, the buffer directs the address data to address logic and places the print data on the respective data line, and the address logic encodes the address represented by the address data onto the address line. For each primitive, the activation device corresponding to the address on the address bus activates a corresponding primitive function based on the corresponding print data when a fire pulse is present on the fire pulse line.

Printhead employing data packets including address data

A print head has a fluid slot and a sensing chamber having a first port connected to the fluid slot and a second port. The sensing chamber contains an ink level sensor. A circulation passage extends from the fluid slot and is fluidly coupled to the second port. A fluid pump circulates fluid through the circulation passage.

Print head sensing chamber circulation

In some examples, a method of regulating a temperature of a printhead includes charging, in a first state of a temperature regulator, an analog memory to a reference voltage that corresponds to a predetermined temperature of the printhead. The temperature regulator monitors, during a second state, the temperature of the printhead, the monitoring including measuring a thermal voltage representing an actual temperature of at least a first local area of a plurality of local areas of the printhead, and comparing, with a comparator, the reference voltage to the thermal voltage to obtain a comparison result for at least the first local area. Based on the comparison result, a series of warming pulses from a warming pulse circuit to at least the first local area is selectively enabled.

Method and apparatus to regulate temperature of printheads

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.

Inkjet printhead device, fluid ejection device, and method thereof

A print component includes an address line, data lines, a fire pulse line, and a plurality of primitives, each primitive corresponding to a different data line and including a plurality of activation devices each corresponding to a different address of a set of addresses. A buffer receives data packets each including address data representative of an address of the set of addresses and print data for each primitive, places the print data on the respective data line of the corresponding primitive, and directs the address data to address logic which encodes the address data onto the address line in the order of reception of the address data by the buffer via the data packets. For each primitive, the activation device corresponding to the address on the address line activates a corresponding primitive function based on the corresponding print data when a fire pulse is present on the fire pulse line.

In an implementation, a printhead includes a nozzle and a fluid channel. A sensor plate is located within the fluid channel. An impedance measurement circuit is coupled to the sensor plate to measure impedance of fluid within the channel during a fluid movement event that moves fluid past the sensor plate.

Printheads with sensor plate impedance measurement

A printhead including an address line for communicating a set of addresses and a number of primitives, each primitive including a plurality of controllable activation devices coupled to the address line, each switch corresponding to at least one address of the set of addresses, each address corresponding to one of a number of primitive functions. A buffer receives a series of data packets, each data packet including address bits representative of one address of the set of addresses. Address logic receives the address bits from the buffer, wherein for each data packet the address logic encodes the address represented by the address bits onto the address line, and wherein the at least one switch corresponding to the address activates the primitive function corresponding to address.

In an embodiment, a fluid level sensor includes a sensor plate and a current source. The fluid level sensor also includes an algorithm to bias the current source such that current applied to the sensor plate induces a maximum difference in response voltage between a dry sensor plate condition and a wet sensor plate condition.

Fluid level sensor and related methods

In some examples, a cartridge includes a printhead comprising a fluid feed slot, a fluid chamber formed between a nozzle layer and a passivation layer, the fluid chamber fluidically coupling the fluid feed slot and a nozzle of the nozzle layer, and a printhead-integrated sensor to sense a property of a fluid in the fluid chamber, the sensor including a ground electrode exposed to the fluid chamber through an opening in the passivation layer.

Cartridges comprising sensors including ground electrodes exposed to fluid chambers

An apparatus including an analog memory, a temperature sensor, a comparator, and a pulse circuit. The analog memory is charged to a reference voltage corresponding to a predetermined temperature of a printhead. The temperature sensor measures a thermal voltage of at least one of the plurality of local areas of the printhead. The comparator obtains a comparison result by comparing the reference voltage to the thermal voltage. The pulse circuit selectively transmits a series of warming pulses to the at least one of the plurality of local areas of the printhead based on the comparison result.

A print head has an ink slot and a sensing chamber having a first port connected to the fluid slot and a second port. The sensing chamber contains an ink level sensor. A recirculation passage extends from the fluid slot and is fluidly coupled to the second port. A fluid pump circulates fluid through the recirculation passage.

An example provides a fluid ejection apparatus including a fluid feed slot along a length of a print head die of the fluid ejection apparatus to supply a fluid to a plurality of drop ejectors, control circuitry adjacent to at least one side of the fluid feed slot to control ejection of drops of fluid from the plurality of drop ejectors, and a single power supply connector at an end of the print head die to supply power to the control circuitry.

Fluid ejection apparatus with single power supply connector

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.

Inkjet printing system, fluid ejection system, and method thereof

Growing community of inventors

Corvallis, OR, United States of America

Adam L Ghozeil