Fluid ejection device

A fluid ejection device includes a fluid slot, a plurality of fluid ejection chambers communicated with the fluid slot, a plurality of drop ejecting elements one of each within one of the fluid ejection chambers, a plurality of fluid circulation channels each communicated with the fluid slot and one or more of the fluid ejection chambers, and a plurality of fluid circulating elements each communicated with one or more of the fluid circulation channels. The fluid circulating elements are to provide intermittent circulation of fluid from the fluid slot through the one or more of the fluid circulation channels and the one or more of the fluid ejection chambers.

Fluid ejection device

A fluid ejection device includes a fluid slot, at least one fluid ejection chamber communicated with the fluid slot, a drop ejecting element within the at least one fluid ejection chamber, a fluid circulation channel communicated with the fluid slot and the at least one fluid ejection chamber, and a fluid circulating element communicated with the fluid circulation channel. The fluid circulating element is to provide on-demand circulation of fluid from the fluid slot through the fluid circulation channel and the at least one fluid ejection chamber.

FLUID EJECTION DEVICE

A fluid ejection device includes a fluid slot, at least one fluid ejection chamber communicated with the fluid slot, a drop ejecting element within the at least one fluid ejection chamber, a fluid circulation channel communicated with the fluid slot and the at least one fluid ejection chamber, and a fluid circulating element communicated with the fluid circulation channel. The fluid circulating element is to provide on-demand circulation of fluid from the fluid slot through the fluid circulation channel and the at least one fluid ejection chamber. 1. A method of operating a fluid ejection device , comprising:communicating a fluid circulation channel with a fluid slot and a fluid ejection chamber, the fluid circulation channel having a fluid circulating element communicated therewith, and the fluid ejection chamber having a drop ejecting element therein; andcontrolling on-demand circulation of fluid from the fluid slot through the fluid circulation channel and the fluid ejection chamber by operation of the fluid circulating element, wherein the controlling of the on-demand circulation by the operation of the fluid circulating element comprises initiating the on-demand circulation in response to detecting that a decap time limit has been violated, the decap time limit representing an amount of time a nozzle can remain uncapped and exposed to an ambient condition without causing a degradation in an ejection of a drop produced by the drop ejecting element.2. The method of claim 1 , wherein the controlling of the on-demand circulation by the operation of the fluid circulating element comprising varying a frequency or a number of circulation pulses of the operation of the fluid circulating element for a printing system.3. The method of claim 2 , wherein the frequency of the operation of the fluid circulating element as controlled by the controlling is asynchronous to a frequency of operation of the drop ejecting element.4. The method of claim 1 , wherein the controlling ...

THERMAL FLUID-EJECTION DEVICE DIE

A die for a thermal drop-on-demand fluid-ejection device includes thermal firing resistors, low-side switches, and high-side switches. The thermal firing resistors are organized over resistor groups such that each thermal firing resistor is located within only one of the resistor groups. The resistor groups are lesser in number than the thermal firing resistors. Each thermal firing resistor has a first end and a second end. The low-side switches are equal in number to the thermal firing resistors. Each low-side switch connects the second end of a corresponding thermal firing resistor to a low voltage. The high-side switches are equal in number to the resistor groups. Each high-side switch connects the first ends of the thermal firing resistors of a corresponding resistor group to power providing a voltage greater than the low voltage.

Printhead employing data packets including address data

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 NOZZLE ADDRESSING

Fluid ejection devices with multiple activation modes are disclosed. An example printhead assembly includes a fluid ejection nozzle, a first resistor fluidically coupled to the fluid ejection nozzle, and a second resistor fluidically coupled to the fluid ejection nozzle. The example printhead also includes an addressing circuit to receive a nozzle address and an activation mode to activate the fluid ejection nozzle. The activation mode determines which of the first resistor and the second resistor are to be energized. 1. A method comprising:sending address information and a mode indication to a printhead, wherein the address information identifies a fluid ejection nozzle comprising a plurality of energy delivery devices;processing the address information and the mode indication using a logic gate included in the printhead, the logic gate to output a plurality of output address bits corresponding to a plurality of input address bits in the address information; and when the mode indication is set to a first value, changing, by the logic gate, a value of a first output address bit of the plurality of output address bits in response to a change in value of a first input address bit of the plurality of input address bits, and', 'when the mode indication is set to a second value different from the first value, setting, by the logic gate, the first output address bit to a same value regardless of the value of the first input address bit., 'activating the identified fluid ejection nozzle, wherein based on a combination of a value of the address information and a value of the mode indication received by the logic gate, the logic gate determines how many energy delivery devices of the identified fluid ejection nozzle are energized based on2. The method of claim 1 , wherein the activating of the identified fluid ejection nozzle comprises activating a simultaneous micro-recirculation mode based on the mode indication.3. The method of claim 1 , wherein the activating of the ...

PRINTHEAD EMPLOYING DATA PACKETS INCLUDING ADDRESS DATA

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. 1. A print component comprising:an address line;a set of data lines;a fire pulse line;a plurality of primitives, each primitive corresponding to a different data line of the set of data lines and including a plurality of activation devices addressed by a set of addresses, each activation device corresponding to a different address of the set of addresses and controllable to activate a corresponding primitive function; 'receive a series of data packets, each data packet including address data representative of an address of the set of addresses and print data for each primitive;', 'a buffer to direct the address data to address logic; and', 'place the print data on the respective data line of the corresponding primitive; and, 'for each data packet, the buffer to receive the address data from the buffer; and', 'encode the address represented by 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 data packet, the address logic tofor each primitive, the activation device corresponding to the address ...

PRINTHEAD

Printheads and techniques for manufacturing printheads are disclosed. An example method includes forming drive circuit components in a circuit layer. The method also includes forming a fluidic device that causes fluid to be ejected from a nozzle. The method also includes forming an interconnect layer that couples the drive circuit components. 1. A method of manufacturing a printhead , comprising:forming drive circuit components, wherein a layout of the drive circuit components is a standardized layout that is not dependent on a nozzle density of the printhead;forming fluidic devices over the drive circuit components, the fluidic devices comprising fluid chambers with fluid ejection nozzles;forming an interconnect layer over the drive circuit components, wherein the interconnect layer configures the drive circuit components, and wherein a layout of the interconnect layer is selected based, at least in part, on the nozzle density of the printhead.2. The method of claim 1 , comprising forming a plurality of energy delivery devices and a plurality of activation devices activating the energy delivery device claim 1 , wherein each of the fluid ejection nozzles is associated with a corresponding energy delivery device claim 1 , and wherein forming the interconnect layer comprises coupling each activation device to an energy delivery device that is addressable to activate the nozzle.3. The method of claim 1 , comprising forming a plurality of energy delivery devices and a plurality of activation devices for activating the energy delivery devices claim 1 , wherein each of the fluid ejection nozzles is associated with a corresponding energy delivery device claim 1 , and wherein forming the interconnect layer comprises coupling each energy delivery device with a pair of activation devices that is addressable to activate the nozzle.4. The method of claim 3 , wherein the pair of activation devices is driven by an output received from a same one of the drive circuit components.5. ...

Fluid ejection device

A fluid ejection device includes a fluid slot, at least one fluid ejection chamber communicated with the fluid slot, a drop ejecting element within the at least one fluid ejection chamber, a fluid circulation channel communicated with the fluid slot and the at least one fluid ejection chamber, and a fluid circulating element communicated with the fluid circulation channel. The fluid circulating element is to provide on-demand circulation of fluid from the fluid slot through the fluid circulation channel and the at least one fluid ejection chamber.

Fluid ejection array controller

An apparatus includes a plurality of nozzles configured to eject fluid and a fluid ejection array controller connected to the plurality of nozzles. The nozzles are arranged into a plurality of primitives, and the primitives are further arranged into a plurality of virtual primitives that each includes at least two primitives. The fluid ejection array controller generates ejection control data for each virtual primitive based on contents of a virtual primitive control packet. The ejection control data includes, for each virtual primitive, a first instruction instructing a first primitive of the virtual primitive to fire and a second instruction instructing a second primitive of the virtual primitive to not fire.

Moving a structure

Embodiments of moving a structure using a bubble are disclosed.

PRINTHEAD EMPLOYING DATA PACKETS INCLUDING ADDRESS DATA

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 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 PULSE POWER GROUND 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.

Fluid recirculation channels

A fluid recirculation channel for dispensing a plurality of fluid drop weights includes a number of sub-channels. The sub-channels include at least one pump channel, and a plurality of drop generator channels fluidically coupled to the at least one pump channel. The fluid recirculation channel further includes a number of pump generators incorporated into the at least one pump channel, a number of drop generators incorporated into drop generator channels, and a plurality of nozzles defined within the drop generator channels, the nozzles being at least as numerous as the number of drop generators.

PRINT HEAD DIE WITH THERMAL CONTROL

A print head die may include a substrate, an electrical connector and at least three liquid feed slots. The electrical connector is on a first side of the substrate and extends along the major dimension of the substrate. The electrical connector is connectable directly to an electrical interconnect to connect the print head die to a controller. The at least three liquid feed slots are formed in the substrate and extend along the major dimension of the substrate. Wherein at least one and less than all of the at least three liquid feed slots has an associated temperature sensor connected to the electrical connector.

FLUID EJECTION DEVICE WITH A FLUID RECIRCULATION CHANNEL

According to an example, a fluid ejection device may include a fluid feed slot, a plurality of fluid ejection chambers in fluid communication with the fluid feed slot, a plurality of drop ejecting elements, in which a drop ejecting element of the plurality of drop ejecting elements is positioned within each of the plurality of fluid ejection chambers, a fluid circulation channel in fluid communication at a first end of the fluid circulation channel with the fluid feed slot and in fluid communication at multiple second ends of the fluid circulation channel with the plurality of fluid ejection chambers, and a fluid circulating element within the fluid circulation channel. The fluid ejection device may also include a bubble dissipating structure positioned within the fluid circulation channel outside of the plurality of fluid ejection chambers. 1. A fluid ejection device , comprising:a fluid feed slot;a plurality of fluid ejection chambers in fluid communication fluid with the fluid feed slot;a plurality of drop ejecting elements, wherein a drop ejecting element of the plurality of drop ejecting elements is positioned within each of the plurality of fluid ejection chambers;a fluid circulation channel in fluid communication at a first end of the fluid circulation channel with the fluid feed slot and in fluid communication at multiple second ends of the fluid circulation channel with the plurality of fluid ejection chambers;a fluid circulating element within the fluid circulation channel; anda bubble dissipating structure positioned within the fluid circulation channel outside of the plurality of fluid ejection chambers.2. The fluid ejection device of claim 1 , wherein the fluid circulation channel comprises a substantially constant width between the first end and the multiple second ends and wherein the bubble dissipating structure is positioned between the first end and the multiple second ends.3. The fluid ejection device of claim 1 , wherein the fluid circulation ...

PRINTHEAD EMPLOYING DATA PACKETS INCLUDING ADDRESS DATA

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. 1. A printhead comprising:an address line to communicate a set of addresses;a number of activation devices arranged to form a number of primitives, for each primitive, the activation devices addressable by the set of addresses via the address line with each activation device corresponding to a different address of the set of addresses;a set of data lines, each data line of the set of data lines corresponding to a different one of the primitives; and receive data packets, each data packet including address data representative of an address of the set of addresses and print data for each primitive;', 'place the print data for each primitive on the corresponding data line; and', 'encode the address represented by the address data onto the address line., 'control logic to2. The printhead of claim 1 , the control logic to encode addresses on the address line in an order in which the address data is received via the data packets such that some addresses of the set of addresses may be encoded onto the address line more frequently than other addresses of the set ...

Printhead nozzle addressing

Fluid ejection devices with multiple activation modes are disclosed. An example printhead assembly includes a fluid ejection nozzle, a first resistor fluidically coupled to the fluid ejection nozzle, and a second resistor fluidically coupled to the fluid ejection nozzle. The example printhead also includes an addressing circuit to receive a nozzle address and an activation mode to activate the fluid ejection nozzle. The activation mode determines which of the first resistor and the second resistor are to be energized.

Printhead employing data packets including address data

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.

Print head die with thermal control

A print head die may include a substrate, an electrical connector and at least three liquid feed slots. The electrical connector is on a first side of the substrate and extends along the major dimension of the substrate. The electrical connector is connectable directly to an electrical interconnect to connect the print head die to a controller. The at least three liquid feed slots are formed in the substrate and extend along the major dimension of the substrate. Wherein at least one and less than all of the at least three liquid feed slots has an associated temperature sensor connected to the electrical connector.

FLUID EJECTION DEVICE

A fluid ejection device includes a fluid slot, at least one fluid ejection chamber communicated with the fluid slot, a drop ejecting element within the at least one fluid ejection chamber, a fluid circulation channel communicated with the fluid slot and the at least one fluid ejection chamber, and a fluid circulating element communicated with the fluid circulation channel. The fluid circulating element is to provide on-demand circulation of fluid from the fluid slot through the fluid circulation channel and the at least one fluid ejection chamber.

Printhead employing data packets including address data

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.

Fluid ejection device circuit

In some examples, a circuit for a fluid ejection device includes an energy delivery device and a circuit layer. The circuit layer includes first and second activation devices connected to the energy delivery device, the first and second activation devices to activate the energy delivery device, first drive logic coupled to the first activation device, and second drive logic coupled to the second activation device. An interconnect layer couples a same address selection signal to the first drive logic and the second drive logic.

Printhead nozzle addressing

Fluid ejection devices with multiple activation modes are disclosed. An example printhead assembly includes a fluid ejection nozzle, a first resistor fluidically coupled to the fluid ejection nozzle, and a second resistor fluidically coupled to the fluid ejection nozzle. The example printhead also includes an addressing circuit to receive a nozzle address and an activation mode to activate the fluid ejection nozzle. The activation mode determines which of the first resistor and the second resistor are to be energized.

Printhead employing data packets including address data

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.

Printhead

Printheads and techniques for manufacturing printheads are disclosed. An example method includes forming drive circuit components in a circuit layer. The method also includes forming a fluidic device that causes fluid to be ejected from a nozzle. The method also includes forming an interconnect layer that couples the drive circuit components.

Crack detection circuits for printheads

Crack detection circuits for printheads are described. In an example, a crack detection circuit for at least one printhead, includes: crack detectors formed on the at least one printhead; switches selectively coupling the crack detectors on each printhead to a communication bus; and a configuration circuit on each printhead coupled to control inputs of the respective switches, each configuration circuit responsive to a crack detection configuration input to control the respective switches.

FLUID EJECTION DEVICE

A fluid ejection device includes a fluid slot, a plurality of fluid ejection chambers communicated with the fluid slot, a plurality of drop ejecting elements one of each within one of the fluid ejection chambers, a plurality of fluid circulation channels each communicated with the fluid slot and one or more of the fluid ejection chambers, and a plurality of fluid circulating elements each communicated with one or more of the fluid circulation channels. The fluid circulating elements are to provide intermittent circulation of fluid from the fluid slot through the one or more of the fluid circulation channels and the one or more of the fluid ejection chambers. 1. A fluid ejection device , comprising:a fluid feed slot;a plurality of fluid ejection chambers;a drop ejecting element within each of the fluid ejection chambers;a plurality of fluid circulation channels communicating between the fluid feed slot and each of the fluid ejection chambers;a fluid circulating element between the fluid feed slot and the plurality of fluid ejection chambers to induce a flow of fluid from the fluid feed slot, through the plurality of fluid circulation channels, to the plurality of fluid ejection chambers; anda controller to control the fluid circulating element to circulate fluid from the fluid feed slot based on operation of the drop ejecting elements.2. The fluid ejection device of claim 1 , wherein the plurality of fluid circulation channels branch from a common connection to the fluid feed slot claim 1 , the fluid circulating element being disposed at the common connection to the fluid feed slot.3. The fluid ejection device of claim 1 , further comprising two rows of fluid ejection chambers arranged along either side of the fluid feed slot.4. The fluid ejection device of claim 3 , further comprising:a first set of fluid circulation channels communicating between the fluid feed slot and each of the fluid ejection chambers in a first of the two rows of fluid ejection chambers; anda ...

FLUID EJECTION DEVICE CIRCUIT

In some examples, a circuit for a fluid ejection device includes an energy delivery device and a circuit layer. The circuit layer includes first and second activation devices connected to the energy delivery device, the first and second activation devices to activate the energy delivery device, first drive logic coupled to the first activation device, and second drive logic coupled to the second activation device. An interconnect layer couples a same address selection signal to the first drive logic and the second drive logic.

FLUID RECIRCULATION CHANNELS

A fluid recirculation channel for dispensing a plurality of fluid drop weights includes a number of sub-channels. The sub-channels include at least one pump channel, and a plurality of drop generator channels fluidically coupled to the at least one pump channel. The fluid recirculation channel further includes a number of pump generators incorporated into the at least one pump channel, a number of drop generators incorporated into drop generator channels, and a plurality of nozzles defined within the drop generator channels, the nozzles being at least as numerous as the number of drop generators.

Power distribution in a thermal ink jet printhead

A thermal inkjet printhead may include a substrate and a resistive layer. A thermal resistor may be formed in the resistive layer. A first metal layer may be between the substrate and a resistive layer having a thickness to form a power bus. A dielectric layer may be between the first metal layer and the resistive layer.

Fluid ejection device with a fluid recirculation channel

According to an example, a fluid ejection device may include a fluid feed slot, a plurality of fluid ejection chambers in fluid communication with the fluid feed slot, a plurality of drop ejecting elements, in which a drop ejecting element of the plurality of drop ejecting elements is positioned within each of the plurality of fluid ejection chambers, a fluid circulation channel in fluid communication at a first end of the fluid circulation channel with the fluid feed slot and in fluid communication at multiple second ends of the fluid circulation channel with the plurality of fluid ejection chambers, and a fluid circulating element within the fluid circulation channel. The fluid ejection device may also include a bubble dissipating structure positioned within the fluid circulation channel outside of the plurality of fluid ejection chambers.

Print head die with thermal control

A print head die with thermal control is described. In an example, a print head die includes a substrate having liquid feed slots formed therein extending along a major dimension of the substrate and nozzles extending along opposite sides of each of the liquid feed slots; a temperature sensor formed on the substrate adjacent to a first one of the liquid feed slots; and electrical interconnect formed on the substrate along the major dimension adjacent to a last one of the liquid feed slots farthest from the first liquid feed slot.

FLUID EJECTION ARRAY CONTROLLER

An apparatus includes a plurality of nozzles configured to eject fluid and a fluid ejection array controller connected to the plurality of nozzles. The nozzles are arranged into a plurality of primitives, and the primitives are further arranged into a plurality of virtual primitives that each includes at least two primitives. The fluid ejection array controller generates ejection control data for each virtual primitive based on contents of a virtual primitive control packet. The ejection control data includes, for each virtual primitive, a first instruction instructing a first primitive of the virtual primitive to fire and a second instruction instructing a second primitive of the virtual primitive to not fire.

PEAK ENERGY REDUCTION PRINTHEAD SYSTEM

A printhead system to reduce peak energy usage may include a printhead including a plurality of primitives including nozzles. A printhead control module may control the printhead to increase printed pixel resolution and to reduce peak pixel fill density for print media. The printhead control module may further control the printhead such that all the nozzles with a same address generally disposed in a column do not fire at the same time. 1. A printhead system to reduce peak energy usage , the printhead system comprising:a printhead including a plurality of primitives including nozzles; anda printhead control module to control the printhead to increase printed pixel resolution and to reduce peak pixel fill density for print media, the printhead control module to further control the printhead such that all the nozzles with a same address generally disposed in a column do not fire at the same time.2. The printhead system of claim 1 , wherein the plurality of primitives are disposed on opposite sides of a slot and include the nozzles disposed in a pattern such that each nozzle fires a unique drop on the print media.3. The printhead system of claim 1 , wherein the nozzles are disposed in a staggered pattern.4. The printhead system of claim 1 , wherein each primitive includes an odd number of the nozzles along with an expansion mask that has a pattern that repeats with an even number of pixels.5. The printhead system of claim 1 , wherein each primitive includes an even number of the nozzles along with an expansion mask that repeats with an odd number of pixels.6. The printhead system of claim 1 , wherein the printhead control module is to control the printhead to increase the printed pixel resolution to approximately double electrical density for printing.7. The printhead system of claim 1 , wherein the printhead control module is to control the printhead to limit the peak pixel fill density to approximately 50% of available pixels.8. The printhead system of claim 1 , ...

Fluid ejection device

A fluid ejection device includes a fluid slot, a plurality of fluid ejection chambers communicated with the fluid slot, a plurality of drop ejecting elements one of each within one of the fluid ejection chambers, a plurality of fluid circulation channels each communicated with the fluid slot and one or more of the fluid ejection chambers, and a plurality of fluid circulating elements each communicated with one or more of the fluid circulation channels. The fluid circulating elements are to provide intermittent circulation of fluid from the fluid slot through the one or more of the fluid circulation channels and the one or more of the fluid ejection chambers.

PRINTHEAD NOZZLE ADDRESSING

Fluid ejection devices with multiple activation modes are disclosed. An example printhead assembly includes a fluid ejection nozzle, a first resistor fluidically coupled to the fluid ejection nozzle, and a second resistor fluidically coupled to the fluid ejection nozzle. The example printhead also includes an addressing circuit to receive a nozzle address and an activation mode to activate the fluid ejection nozzle. The activation mode determines which of the first resistor and the second resistor are to be energized.

PRINT HEAD DIE WITH THERMAL CONTROL

Staggered fluid ejection dies may include first, second and third fluid ejection dies, each of the dies having fluid feed passages between first and second long edges. And electrical interconnect may extend from a location proximate the first long edge of each of the fluid ejection dies. A temperature sensor may be supported proximate the second long edge of each of the fluid ejection dies. Each of the fluid ejection dies may omit temperature sensors proximate the first long edge. 1. An apparatus comprising: a first fluid ejection die having first fluid feed passages between a first long edge and a second long edge of the first fluid ejection die;', 'a second fluid ejection die overlapping the first fluid ejection die on a first side of the first fluid ejection die, the second fluid ejection die having second fluid feed passages between a first long edge and a second long edge of the second fluid ejection die;', 'a third fluid ejection die overlapping the first fluid ejection die on a second side of the fluid ejection die opposite the first side, the third fluid ejection die having a third fluid feed passages between a first long edge and a second long edge of the third fluid ejection die;, 'a staggered fluid ejection dies, the staggered fluid ejection dies comprisingan electrical interconnect extending from a location proximate the first long edge of each of the first fluid ejection die, the second fluid ejection die and the third fluid ejection die; anda temperature sensor supported proximate the second long edge of each of the first fluid ejection die, the second fluid ejection die and the third fluid ejection die, each of the first fluid ejection die, the second fluid ejection die and the third fluid ejection die omitting temperature sensors proximate the first long edge.2. The apparatus of claim 1 , wherein the first fluid delivery passages claim 1 , the second fluid delivery passages and the third fluid delivery passages comprise fluid feed slots.3. The ...

THERMAL INK JET PRINTHEAD

A thermal inkjet printhead may include a substrate and a resistive layer. A thermal resistor may be formed in the resistive layer. A first metal layer may be between the substrate and a resistive layer having a thickness to form a power bus. A dielectric layer may be between the first metal layer and the resistive layer. 1. A thermal ink jet printhead , comprising:a substrate;a resistive layer;a first metal layer between the substrate and the resistive layer having a thickness to form a power bus;a dielectric layer between the first metal layer and the resistive layer; anda thermal resistor formed in the resistive layer.2. The thermal ink jet printhead of claim 1 , further comprising a thermal inkjet chamber formed in a polymer layer.3. The thermal ink jet printhead of claim 1 , wherein a thermal conductivity of the dielectric layer is between 0.05 W/cm° K and 0.2 W/cm° K.4. The thermal ink jet printhead of claim 1 , wherein a thermal diffusivity of the dielectric layer is between 0.004 cm/sec and 0.25 cm/sec.5. The thermal ink jet printhead of claim 1 , wherein a dielectric for the dielectric layer is selected from the group consisting of tetraethyl orthosilicate (TEOS or Si(OCH)) claim 1 , field oxide claim 1 , silicon dioxide (SiO) claim 1 , undoped silicate glass (USG) claim 1 , phospho-silicate glass (PSG) claim 1 , boro-silicate glass (BSG) claim 1 , and boro-phospho-silicate glass (BPSG) claim 1 , AlO claim 1 , HfO claim 1 , SiC claim 1 , SiN claim 1 , and combination thereof.6. The thermal ink jet printhead of claim 1 , wherein the dielectric layer has a thickness between 0.4 μm and 2 μm to provide thermal insulation between the first metal layer and the resistive layer.7. The thermal ink jet printhead of claim 1 , wherein the dielectric layer has a thickness between 0.4 μm and 0.6 μm to form a control gate.8. The thermal ink jet printhead of claim 1 , wherein a sheet resistance of the resistive layer is between 20 Ω/square and 1000 Ω/square.9. The thermal ...

Print head die with thermal control

Staggered fluid ejection dies may include first, second and third fluid ejection dies, each of the dies having fluid feed passages between first and second long edges. And electrical interconnect may extend from a location proximate the first long edge of each of the fluid ejection dies. A temperature sensor may be supported proximate the second long edge of each of the fluid ejection dies. Each of the fluid ejection dies may omit temperature sensors proximate the first long edge.

Peak energy reduction printhead system

A printhead system to reduce peak energy usage may include a printhead including a plurality of primitives including nozzles. A printhead control module may control the printhead to increase printed pixel resolution and to reduce peak pixel fill density for print media. The printhead control module may further control the printhead such that all the nozzles with a same address generally disposed in a column do not fire at the same time.

Print head die with thermal control

A print head die with thermal control is described. In an example, a print head die includes a substrate having liquid feed slots formed therein extending along a major dimension of the substrate and nozzles extending along opposite sides of each of the liquid feed slots; a temperature sensor formed on the substrate adjacent to a first one of the liquid feed slots; and electrical interconnect formed on the substrate along the major dimension adjacent to a last one of the liquid feed slots farthest from the first liquid feed slot.

FLUID EJECTION DEVICE

A fluid ejection device includes a fluid slot, a plurality of fluid ejection chambers communicated with the fluid slot, a plurality of drop ejecting elements one of each within one of the fluid ejection chambers, a plurality of fluid circulation channels each communicated with the fluid slot and one or more of the fluid ejection chambers, and a plurality of fluid circulating elements each communicated with one or more of the fluid circulation channels. The fluid circulating elements are to provide intermittent circulation of fluid from the fluid slot through the one or more of the fluid circulation channels and the one or more of the fluid ejection chambers. 1. A fluid ejection device , comprising:a fluid slot;a plurality of fluid ejection chambers communicated with the fluid slot;a plurality of drop ejecting elements one of each within one of the fluid ejection chambers;a plurality of fluid circulation channels each communicated with the fluid slot and one or more of the fluid ejection chambers; anda plurality of fluid circulating elements each communicated with one or more of the fluid circulation channels,the fluid circulating elements to provide intermittent circulation of fluid from the fluid slot through the one or more of the fluid circulation channels and the one or more of the fluid ejection chambers.2. The fluid ejection device of claim 1 , wherein operation of the fluid circulating elements is provided periodically between disassociated periods of operation of the drop ejecting elements.3. The fluid ejection device of claim 1 , wherein operation of the fluid circulating elements is provided stochastically between disassociated periods of operation of the drop ejecting elements.4. The fluid ejection device of claim 3 , wherein the operation of the fluid circulating elements includes operation of different fluid circulating elements at different times.5. The fluid ejection device of claim 1 , wherein a frequency of the intermittent circulation is variable ...

Print head die

A print head die is described. In one example, the print head die includes a substrate having liquid feed slots formed therein extending along a major dimension of the substrate and nozzles extending along opposite sides of each of the liquid feed slots; and electrical interconnect formed on the substrate along the major dimension adjacent a last one of the liquid feed slots. A first one of the liquid feed slots opposite the last liquid feed slot and farthest from the electrical interconnect supplies an ink using a higher drop volume than inks in other ones of the liquid feed slots. The last liquid feed slot supplies an ink having a higher contrast with the ink in the first liquid feed slot than with inks in other ones of the liquid feed slots.

printhead employing data packets including address data

Fluid ejection device with a fluid recirculation channel

According to an example, a fluid ejection device may include a fluid feed slot, a plurality of fluid ejection chambers in fluid communication with the fluid feed slot, a plurality of drop ejecting elements, in which a drop ejecting element of the plurality of drop ejecting elements is positioned within each of the plurality of fluid ejection chambers, a fluid circulation channel in fluid communication at a first end of the fluid circulation channel with the fluid feed slot and in fluid communication at multiple second ends of the fluid circulation channel with the plurality of fluid ejection chambers, and a fluid circulating element within the fluid circulation channel. The fluid ejection device may also include a bubble dissipating structure positioned within the fluid circulation channel outside of the plurality of fluid ejection chambers.

Printhead employing data packets including address data

PRINTHEAD EMPLOYING DATA PACKETS INCLUDING ADDRESS DATA Abstract A printhead including an address line for communicating a set of addresses and a number of primitives, each primitive including a plurality of controllable switches 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. WO 2016/130157 PCT/US2015/015916 PRIMITIVE GROUP PG(L) 294 302 300 1 9 2 ------------------? EMBEDDED FIRE PRIMITIVE PRIMITIVE PRINT> BUFFER ADDRESS PULSE POWER GROUND DATA - LOGIC_1__96 197 197 PACKETS 208 202 241061 162-1 DATA ADDRESS A1 AND 162-2 1l70-1 DECODE 206-2 >ADDRESS A2 A170-2 PRIMITIVE DECODE P(2) 0162-N 204-2 206-N 4-ADDRESS AN AND T170-N 204-N IL 206-1 162-1 2m4-1 fl ADDRESS A1 AN 162-217 DECODE 206-2 180 ADDRESS A2 -- AND 170-2 PRIMITIVE 0-DECODE4-)- P(N) .206-N .204-2 . AD162-Nj"L ADDRESS AN AND :11 70-N 204-N Fig. 7

Method and system for dispensing liquid

A method and an apparatus for dispensing liquid are disclosed. The method includes the steps of storing one or more liquids in a thermal inkjet print head and providing a well plate having at least one well. At least one of the liquids is dispensed from the thermal inkjet print head into at least one well. The volume of the dispensed liquid is a fraction of the total required volume of the liquid in the at least one well, and the dispensing step is performed multiple times to dispense the required volume of the at least one liquid in at least one well.

Thermal fluid-ejection device die

Thermal fluid-ejection device die

A die for a thermal drop-on-demand fluid-ejection device includes thermal firing resistors, low-side switches, and high-side switches. The thermal firing resistors are organized over resistor groups such that each thermal firing resistor is located within only one of the resistor groups. The resistor groups are lesser in number than the thermal firing resistors. Each thermal firing resistor has a first end and a second end. The low-side switches are equal in number to the thermal firing resistors. Each low-side switch connects the second end of a corresponding thermal firing resistor to a low voltage. The high-side switches are equal in number to the resistor groups. Each high-side switch connects the first ends of the thermal firing resistors of a corresponding resistor group to power providing a voltage greater than the low voltage.

Fluid ejection assembly, printing system and method of operating a printhead

Printhead employing data packets including address data

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.

Printhead employing data packets including address data

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.

Fluid recirculation channel

【解決手段】いくつかの流体液滴重量を分配する流体再循環チャネルがいくつかのサブチャネルを含む。該サブチャネルは、少なくとも１つのポンプチャネルと、該少なくとも１つのポンプチャネルに流体結合されている複数の液滴発生器チャネルとを含む。流体再循環チャネルは、少なくとも１つのポンプチャネル内に組み込まれているいくつかのポンプ発生器と、液滴発生器チャネル内に組み込まれているいくつかの液滴発生器と、液滴発生器チャネル内に画定されているいくつかのノズルとをさらに含み、該ノズルは、少なくとも液滴発生器の数と同じくらい多数である。【効果】デキャップによる問題を克服した流体再循環チャネルを実現する。【選択図】図１

Fluid ejection device

A fluid ejection device includes a fluid slot, at least one fluid ejection chamber communicated with the fluid slot, a drop ejecting element within the at least one fluid ejection chamber, a fluid circulation channel communicated with the fluid slot and the at least one fluid ejection chamber, and a fluid circulating element communicated with the fluid circulation channel. The fluid circulating element is to provide on-demand circulation of fluid from the fluid slot through the fluid circulation channel and the at least one fluid ejection chamber.

Fluid recirculation channels

A fluid recirculation channel for dispensing a plurality of fluid drop weights includes a number of sub-channels. The sub-channels include at least one pump channel, and a plurality of drop generator channels fluidically coupled to the at least one pump channel. The fluid recirculation channel further includes a number of pump generators incorporated into the at least one pump channel, a number of drop generators incorporated into drop generator channels, and a plurality of nozzles defined within the drop generator channels, the nozzles being at least as numerous as the number of drop generators.

Printhead nozzle addressing

Fluid ejection devices with multiple activation modes are disclosed. An example printhead assembly includes a fluid ejection nozzle, a first resistor fluidically coupled to the fluid ejection nozzle, and a second resistor fluidically coupled to the fluid ejection nozzle. The example printhead also includes an addressing circuit to receive a nozzle address and an activation mode to activate the fluid ejection nozzle. The activation mode determines which of the first resistor and the second resistor are to be energized.

流體噴射組件

Printhead

Printheads and techniques for manufacturing printheads are disclosed. An example method includes forming drive circuit components in a circuit layer. The method also includes forming a fluidic device that causes fluid to be ejected from a nozzle. The method also includes forming an interconnect layer that couples the drive circuit components.

Print head die

Print head die

A print head die is described. In one example, the print head die includes a substrate having liquid feed slots formed therein extending along a major dimension of the substrate and nozzles extending along opposite sides of each of the liquid feed slots; and electrical interconnect formed on the substrate along the major dimension adjacent a last one of the liquid feed slots. A first one of the liquid feed slots opposite the last liquid feed slot and farthest from the electrical interconnect supplies an ink using a higher drop volume than inks in other ones of the liquid feed slots. The last liquid feed slot supplies an ink having a higher contrast with the ink in the first liquid feed slot than with inks in other ones of the liquid feed slots.