Abstract: A droplet discharging apparatus that discharges liquid droplets from one or more nozzles based on drive waveforms, includes a memory and a processor configured to execute generating, as the drive waveforms, a first drive waveform, and a second drive waveform to change a drive voltage without discharging the liquid droplets; and controlling to output one set of drive waveforms including a predetermined number of instances of the first drive waveform and one instance of the second drive waveform.

Abstract: A liquid discharge head includes a connector component, a head unit, and a relay module component. The connector component is electrically connectable to a drive board. Ink from an ink chamber is supplied to the head unit. The relay module component is between the connector component and the head unit. The relay module component is detachable from the connector component and the head unit. The relay module component includes a channel to supply the ink supplied from the ink chamber to the head unit.

Abstract: A liquid discharging apparatus includes a nozzle hole configured to discharge liquid; a liquid chamber provided so as to communicate with the nozzle hole; a piezoelectric element configured to change a pressure applied to the liquid in the liquid chamber to discharge the liquid from the nozzle hole; a driving waveform generation circuit configured to generate a driving waveform signal during a discharge control period having a predetermined cycle, to apply a driving waveform voltage to the piezoelectric element; a switch configured to selectively supply, to the piezoelectric element, a waveform included in the driving waveform signal; and a controller configured to perform voltage setting control for applying a predetermined voltage to the piezoelectric element, in a case where a non-discharge control period, having a predetermined cycle, causes the piezoelectric element to change by a voltage greater than or equal to an allowable voltage.

Abstract: A liquid discharge head includes a connector component, a head unit, and a relay module component. The connector component is electrically connectable to a drive board. Ink from an ink chamber is supplied to the head unit. The relay module component is between the connector component and the head unit. The relay module component is detachable from the connector component and the head unit. The relay module component includes a channel to supply the ink supplied from the ink chamber to the head unit.

Abstract: A droplet discharging apparatus that discharges liquid droplets from one or more nozzles based on drive waveforms, includes a memory and a processor configured to execute generating, as the drive waveforms, a first drive waveform, and a second drive waveform to change a drive voltage without discharging the liquid droplets; and controlling to output one set of drive waveforms including a predetermined number of instances of the first drive waveform and one instance of the second drive waveform.

Abstract: A liquid discharge head includes a nozzle plate including a plurality of nozzles to discharge liquid, a plurality of individual chambers communicating with the plurality of nozzles, respectively, a supply-side channel communicating with the plurality of individual chambers, and a collection-side channel communicating with the plurality of individual chambers. The collection-side channel includes a first channel arranged in a first direction along a surface of the nozzle plate, a second channel communicating with the first channel, the second channel arranged in a second direction across the surface of the nozzle plate, and a branch channel branched from the first channel and connected to the second channel, the branch channel arranged in a third direction across the surface of the nozzle plate.

Abstract: A liquid discharge apparatus that includes a liquid discharge head including a nozzle discharging liquid onto a recording medium and a pressure generating unit generating pressure by a change in a drive waveform of the liquid, a drive waveform generating unit generating the drive waveform applied to the pressure generating unit, and a waveform selection unit selectively masking a part of the drive waveform and selecting a pulse of the drive waveform, wherein the drive waveform includes at least one discharge pulse and a micro-drive pulse for causing a change in meniscus so that the liquid is not discharged at a point where the liquid is not discharged on the recording medium, wherein the micro-drive pulse is disposed at a head of a discharge cycle of the drive waveform, and wherein the micro-drive pulse is disposed at an integer multiple of a natural vibration cycle Tc of the liquid chamber.

Abstract: A liquid tank includes a tank body configured to store a liquid to be supplied to a liquid discharge head, a first container, a second container, a partition dividing an interior of the tank body into the first container and the second container, a communication path disposed in the tank body, the communication path connecting the first container and the second container, a liquid inlet communicating with the first container, a liquid outlet disposed at a position lower than the communication path, the liquid outlet communicating with the second container, a first connection port communicating with the first container, the first connection port disposed lower than the liquid inlet and configured to be connected to a supply port of the liquid discharge head, and a second connection port communicating with the second container, the second connection port disposed at a position lower than the liquid outlet.

Abstract: A liquid discharge apparatus includes a liquid discharge head and a pattern printer. The liquid discharge head includes a plurality of nozzles to discharge liquid. The pattern printer drives the liquid discharge head to print a plurality of adjacent rectangular patterns under different drive conditions. The adjacent rectangular patterns are a reference pattern and an adjustment pattern.

Abstract: A drive waveform generating device includes circuitry configured to generate a drive waveform to be applied to a pressure generation element of a liquid discharge head. The drive waveform including a first waveform and a second waveform continuous in time series with the first waveform. The first waveform includes a falling element to lower a potential from an intermediate potential to a lower potential lower than the intermediate potential, a raising element to raise the potential from the lower potential to a higher potential higher than the intermediate potential, and a potential holding element to hold the higher potential. The second waveform includes a raising element to raise the potential from the intermediate potential to a raised potential higher than the intermediate potential, a potential holding element to hold the raised potential, and a falling element to lower the potential from the raised potential to the intermediate potential.

Abstract: A liquid discharge head includes a plurality of nozzles, a plurality of individual liquid chambers, a common liquid chamber, a deformable damper, and a damper chamber. The plurality of nozzles is arrayed in a nozzle array direction, to discharge liquid. The plurality of individual liquid chambers is communicated with the plurality of nozzles. The common liquid chamber supplies liquid to the plurality of individual liquid chambers. The deformable damper constitutes part of a wall face of the common liquid chamber. The damper chamber is disposed along the nozzle array direction with the damper interposed between the damper chamber and the common liquid chamber. The damper chamber extends to an outer area in the nozzle array direction than an individual liquid chamber of the plurality of individual liquid chambers at each end in the nozzle array direction.

Abstract: A liquid discharge apparatus that includes a liquid discharge head including a nozzle discharging liquid onto a recording medium and a pressure generating unit generating pressure by a change in a drive waveform of the liquid, a drive waveform generating unit generating the drive waveform applied to the pressure generating unit, and a waveform selection unit selectively masking a part of the drive waveform and selecting a pulse of the drive waveform, wherein the drive waveform includes at least one discharge pulse and a micro-drive pulse for causing a change in meniscus so that the liquid is not discharged at a point where the liquid is not discharged on the recording medium, wherein the micro-drive pulse is disposed at a head of a discharge cycle of the drive waveform, and wherein the micro-drive pulse is disposed at an integer multiple of a natural vibration cycle Tc of the liquid chamber.

Abstract: A liquid tank includes a tank body configured to store a liquid to be supplied to a liquid discharge head, a first container, a second container, a partition dividing an interior of the tank body into the first container and the second container, a communication path disposed in the tank body, the communication path connecting the first container and the second container, a liquid inlet communicating with the first container, a liquid outlet disposed at a position lower than the communication path, the liquid outlet communicating with the second container, a first connection port communicating with the first container, the first connection port disposed lower than the liquid inlet and configured to be connected to a supply port of the liquid discharge head, and a second connection port communicating with the second container, the second connection port disposed at a position lower than the liquid outlet.

Abstract: Fluid tanks for providing a print fluid to a printhead. In one embodiment, the fluid tank includes a first reservoir configured to contain a print fluid, and a second reservoir configured to contain the print fluid. The fluid tank further includes a first Input/Output (I/O) port configured to fluidly couple with a printhead to allow the print fluid to flow into or out of the first reservoir, and a second I/O port configured to fluidly couple with the printhead to allow the print fluid to flow into or out of the second reservoir. The fluid tank further includes a flexible membrane between the first reservoir and the second reservoir configured to flex to create a pressure difference between the first reservoir and the second reservoir.

Abstract: A liquid discharging apparatus includes a nozzle hole configured to discharge liquid; a liquid chamber provided so as to communicate with the nozzle hole; a piezoelectric element configured to change a pressure applied to the liquid in the liquid chamber to discharge the liquid from the nozzle hole; a driving waveform generation circuit configured to generate a driving waveform signal during a discharge control period having a predetermined cycle, to apply a driving waveform voltage to the piezoelectric element; a switch configured to selectively supply, to the piezoelectric element, a waveform included in the driving waveform signal; and a controller configured to perform voltage setting control for applying a predetermined voltage to the piezoelectric element, in a case where a non-discharge control period, having a predetermined cycle, causes the piezoelectric element to change by a voltage greater than or equal to an allowable voltage.

Abstract: A drive waveform generating device includes circuitry configured to generate a drive waveform to be applied to a pressure generation element of a liquid discharge head. The drive waveform including a first waveform and a second waveform continuous in time series with the first waveform. The first waveform includes a falling element to lower a potential from an intermediate potential to a lower potential lower than the intermediate potential, a raising element to raise the potential from the lower potential to a higher potential higher than the intermediate potential, and a potential holding element to hold the higher potential. The second waveform includes a raising element to raise the potential from the intermediate potential to a raised potential higher than the intermediate potential, a potential holding element to hold the raised potential, and a falling element to lower the potential from the raised potential to the intermediate potential.

Abstract: A liquid discharge apparatus includes a liquid discharge head and a pattern printer. The liquid discharge head includes a plurality of nozzles to discharge liquid. The pattern printer drives the liquid discharge head to print a plurality of adjacent rectangular patterns under different drive conditions. The adjacent rectangular patterns are a reference pattern and an adjustment pattern.

Abstract: A liquid discharge head includes a nozzle plate including a plurality of nozzles to discharge liquid, a plurality of individual chambers communicating with the plurality of nozzles, respectively, a supply-side channel communicating with the plurality of individual chambers, and a collection-side channel communicating with the plurality of individual chambers. The collection-side channel includes a first channel arranged in a first direction along a surface of the nozzle plate, a second channel communicating with the first channel, the second channel arranged in a second direction across the surface of the nozzle plate, and a branch channel branched from the first channel and connected to the second channel, the branch channel arranged in a third direction across the surface of the nozzle plate.

Abstract: A liquid discharge head includes a plurality of nozzles, a plurality of individual liquid chambers, a common liquid chamber, a deformable damper, and a damper chamber. The plurality of nozzles is arrayed in a nozzle array direction, to discharge liquid. The plurality of individual liquid chambers is communicated with the plurality of nozzles. The common liquid chamber supplies liquid to the plurality of individual. liquid chambers. The deformable damper constitutes part of a wall face of the common liquid chamber. The damper chamber is disposed along the nozzle array direction with the damper interposed between the damper chamber and the common liquid chamber. The damper chamber extends to an outer area in the nozzle array direction than an individual liquid chamber of the plurality of individual liquid chambers at each end in the nozzle array direction.

Abstract: A liquid discharge head includes a plurality of nozzles, a plurality of individual liquid chambers, a common liquid chamber, a deformable damper, and a damper chamber. The plurality of nozzles is arrayed in a nozzle array direction, to discharge liquid. The plurality of individual liquid chambers is communicated with the plurality of nozzles. The common liquid chamber supplies liquid to the plurality of individual liquid chambers. The deformable damper constitutes part of a wall face of the common liquid chamber. The damper chamber is disposed along the nozzle array direction with the damper interposed between the damper chamber and the common liquid chamber. The damper chamber extends to an outer area in the nozzle array direction than an individual liquid chamber of the plurality of individual liquid chambers at each end in the nozzle array direction.