A fluid ejection apparatus includes a fluid ejector comprising a pumping chamber, an ejection nozzle coupled to the pumping chamber, and an actuator configured to cause fluid to be ejected from the pumping chamber through the ejection nozzle. The fluid ejection apparatus includes a first compliant assembly formed in a surface of an inlet feed channel, the inlet feed channel fluidically connected to a fluid inlet of the pumping chamber; and a second compliant assembly formed in a surface of an outlet feed channel, the outlet feed channel fluidically connected to a fluid outlet of the pumping chamber. A compliance of the first compliant assembly is different from a compliance of the second compliant assembly.

A liquid jet head includes a plurality of nozzles adapted to jet liquid, a piezoelectric actuator having a plurality of pressure chambers communicated individually with the nozzles and each filled with the liquid, and adapted to change a capacity of each of the pressure chambers, and a control section adapted to apply at least one pulse signal to the piezoelectric actuator to thereby expand and contract the capacity of the pressure chambers to jet the liquid filling the pressure chamber. The pressure chambers adjacent to each other of the plurality of the pressure chambers are set so as to belong to a plurality of groups different from each other. The control section makes the pulse signals different in timing between the plurality of groups and sets a shift amount of the timing in the pulse signals between the respective groups.

A liquid discharge head includes first and second actuators and a drive circuit. Each of the first and second actuators is configured to expand and contract first and second pressure chambers, respectively. The drive circuit is configured to, during a dot formation cycle apply a first number of discharge pulses to the first actuator to cause the first number of droplets to be discharged from the first pressure chamber and apply a second number of discharge pulses to the second actuator to cause the second number of droplets to be discharged from the second pressure chamber and apply a third number of precursors to the second actuator. The first number is greater than or equal to two. Each of the second and third numbers is greater than or equal to one. A sum of the second and third numbers is less than or equal to the first number.

The present invention provides a liquid ejecting module capable of performing stable ejection operation while circulating and supplying fresh ink to the vicinity of ejection ports arranged in high density. To achieve this, a liquid ejecting module includes an element arranged face in which a plurality of ejecting elements are arranged, a circulation flow path including a supply flow path which supplies liquid to a pressure chamber and a collection flow path which collects liquid from the pressure chamber, and a liquid delivery mechanism provided in the circulation flow path for circulating liquid in the pressure chamber. The liquid delivery mechanism is located lower than the element arranged face.

According to one embodiment, a liquid ejection device includes a nozzle plate in which nozzles for ejecting liquid are arranged, an actuator, a liquid supply unit, and a drive control unit. The actuator is provided in each of the nozzles. The liquid supply unit communicates with the nozzles. When one of a plurality of nozzles is given attention, the drive control unit gives drive signals to actuators of nozzles adjacent in an X direction and a Y direction, to drive the actuators at a timing shifted by a predetermined amount, such as half of a drive period, from a timing of an actuator of the nozzle given attention.

According to one embodiment, a liquid ejection device includes a nozzle plate, an actuator, a liquid supply unit, a waveform generation circuit, a waveform allocation circuit, and a drive signal output circuit. A plurality of nozzles for ejecting liquid is arranged in the nozzle plate. The actuator is provided in each of the nozzles. The waveform generation circuit generates plural kinds of drive waveforms with different generation start timings. The waveform allocation circuit can set the drive waveform among plural kinds of drive waveforms and the actuator of the nozzle to be allocated. The drive signal output circuit drives the actuator with the allocated drive waveform.

A liquid discharge apparatus includes a nozzle plate with nozzles and actuators and a drive controller. First and second nozzles are directly adjacent to each other in a first direction. First and third nozzles are directly adjacent to each other in a second direction. The drive controller is configured to apply a drive signal to first, second, and third actuators corresponding to the first, second, and third nozzles, respectively, during a drive cycle. A difference between a first timing at which the drive signal is applied to the first actuator and a second timing at which the drive signal is applied to the second actuator and a difference between the first timing and a third timing at which the drive signal is applied to the third actuator is an odd number multiple of a half of an inherent vibration cycle of the liquid discharge apparatus.

A fluid dispenser calibration system includes a fluid dispenser having a plurality of nozzles, a balance having a balance surface, and a mask positioned between the fluid dispenser and the balance surface. A nozzle pitch is a distance between two adjacent nozzles. The balance measures mass of fluid dispensed from a single nozzle and measures a change in mass on the balance surface. The balance surface has a linear dimension that is greater than the nozzle pitch. The mask includes an aperture and a catch region. The aperture allows fluid dispensed from the single nozzle to impact the balance surface. The catch region catches fluid dispensed from remaining nozzles in the plurality of nozzles.

A fluid dispenser calibration system includes a fluid dispenser having a plurality of nozzles, a balance having a balance surface, and a mask positioned between the fluid dispenser and the balance surface. A nozzle pitch is a distance between two adjacent nozzles. The balance measures mass of fluid dispensed from a single nozzle and measures a change in mass on the balance surface. The balance surface has a linear dimension that is greater than the nozzle pitch. The mask includes an aperture and a catch region. The aperture allows fluid dispensed from the single nozzle to impact the balance surface. The catch region catches fluid dispensed from remaining nozzles in the plurality of nozzles.

The liquid discharge device includes a plurality of volume changing portions and at least one blocking portion. The plurality of volume changing portions are in combination with a plurality of pressure chambers which communicate with nozzles for discharging a liquid and which have inlets through which the liquid flows into the plurality of pressure chambers. The at least one blocking portion blocks communication at the inlets. The plurality of volume changing portions are arranged in a plurality of rows spaced from one another. In a direction along the plurality of rows, the plurality of rows of volume changing portions are staggered from one another. The liquid is discharged from the nozzles by using the plurality of volume changing portions in a state in which the inlets are blocked by the at least one blocking portion.