There are provided a liquid jet head and so on capable of ensuring the ejection stability of the liquid even when jetting the liquid high in viscosity irrespective of the structure of the liquid jet head. The liquid jet head according to an embodiment of the present disclosure includes a plurality of nozzles, an actuator having a plurality of pressure chambers, and a drive section for applying a drive signal to the actuator. The plurality of pulses in the drive signal include at least one first pulse configured to expand the volume of the pressure chamber, and at least one second pulse configured to contract the volume of the pressure chamber, and the pressure in the pressure chamber changes with time including a plurality of extremal values in one cycle. First timing as expansion start timing of the volume of the pressure chamber by the first pulse and second timing as contraction start timing of the volume of the pressure chamber by the second pulse are adjacent to each other, and both of the first timing and the second timing are located in a period between two consecutive extremal values of the plurality of extremal values.

There are provided a liquid jet head and so on capable of ensuring the ejection stability of the liquid even when jetting the liquid high in viscosity irrespective of the structure of the liquid jet head. The liquid jet head according to an embodiment of the present disclosure includes a plurality of nozzles configured to jet liquid, an actuator having a plurality of pressure chambers communicated individually with the nozzles, and each filled with the liquid, and a drive section configured to apply a drive signal having a plurality of pulses in one cycle to the actuator to thereby expand and contract a volume of the pressure chamber to jet the liquid filling the pressure chamber from the nozzle. The plurality of pulses in the drive signal include a plurality of first pulses configured to expand the volume of the pressure chamber, and a plurality of second pulses configured to contract the volume of the pressure chamber. Further, with reference to an on-peak pulse (AP) in the pulses, a pulse width in at least one of the first pulses other than a final first pulse as last one of the first pulses out of the plurality of first pulses in the one cycle is set within a range of 0.2 AP through 1.0 AP, as well as, a pulse width in at least one of the second pulses other than a final second pulse as last one of the second pulses out of the plurality of second pulses in the one cycle is set within a range of 1.0 AP through 1.8 AP.

The present invention has a problem of suppressing liquid gathering of an interpolation dot which interpolates a discharge defective nozzle and preventing deterioration of image quality, and the problem is solved by the present invention including: an inkjet head configured to separately discharge a large droplet, a medium droplet, and a small droplet from each of a plurality of nozzles; and a control unit which forms an image in a single-pass system by discharging the medium droplets from the plurality of nozzles respectively, and forms an interpolation dot to interpolate a discharge defective nozzle by discharging a droplet from a different nozzle when the discharge defective nozzle is present, the control unit forming the interpolation dot to interpolate the discharge defective nozzle with the use of the large droplet and forming at least one adjacent dot which is in contact with the interpolation dot with the use of the small droplet.

A method of atomizing a fluid composition is provided that includes dynamically measuring the minimum-required actuation energy for the fluid composition. The method includes the steps of: connecting a microfluidic cartridge with a housing of a microfluidic device, the microfluidic cartridge comprising a reservoir containing the fluid composition and a microfluidic die in fluid communication with the reservoir; the microfluidic device comprising a controller; measuring the minimum-required actuation energy for the fluid composition at a first time; atomizing the fluid composition in a first atomization period; measuring the minimum-required actuation energy for a fluid composition at a second time that is after the first time; and atomizing the fluid composition in a second atomization period.

A method may include measuring at least one physical parameter of at least one component of a plurality of components of a first fluid ejection die; and calculating an operating energy value to be used to operate the first fluid ejection die based on the at least one physical parameter of the at least one component.

A drive waveform acquisition unit that acquires a drive waveform; a drive voltage generation unit that generates a drive voltage; and a drive voltage supply unit that supplies the drive voltage are included. The drive waveform acquisition unit acquires an overflow waveform used to generate an overflow drive voltage. The drive voltage generation unit generates the overflow drive voltage including one or more overflow pulses corresponding to a period of 0.2 seconds or more and 90 seconds or less. The overflow pulses have a pulse width of 1.2 times or more and 1.8 times or less and an amplitude of 0.3 times or more and 0.8 times or less, and at least one of a rising period or a falling period of 0.3 times or less with respect to a jetting pulse.

A fluidic die that may, in an example, include a regulation module communicatively coupled to a clock generator to receive a clock signal, and a firing pulse adjustment regulator communicatively coupled to the regulation module to receive an adjustment value wherein the regulation module, when executed by a processor, adjusts an input firing pulse at the fluidic die based on the adjustment value.

A head driving device includes a recording head, an input-and-output interface, and circuitry. The recording head includes a plurality of nozzles and a plurality of pressure generating elements corresponding to the plurality of nozzles. The input-and-output interface is configured to acquire correction information generated based on a chart image of a specific pattern for correcting a deviation amount of a landing position of each of the plurality of nozzles. The circuitry is configured to set the correction information acquired by the input-and-output interface and perform correction processing for correcting the deviation amount of the landing position on a driver for each of the plurality of nozzles of the recording head, in accordance with the correction information.

An ink-jet recording apparatus, including: a recording head including a first nozzle communicating with a first chamber storing a first ink and a second nozzle communicating with a second chamber storing a second ink whose viscosity change rate differs from the first ink; and a controller configured to determine a drive voltage to be a first voltage and determine voltage application timings for the respective first and second nozzles to be a first timing when estimated viscosity of the first ink is lower than a first viscosity and to determine the drive voltage to be a second voltage higher than the first voltage, determine the voltage application timing for the first nozzle to be the first timing, and determine the voltage application timing for the second nozzle to be a second timing different from the first timing when the estimated viscosity is equal to or higher than the first viscosity.

There are provided a thermal transfer printer and a method for producing a printed matter capable of suppressing deterioration in printing quality. A first energizing pulse is generated at the beginning of one line period. The first energizing pulse causes each heating element to perform offset heating. Second energizing pulses whose number corresponds to a tone level are generated in one line period. The second energizing pulses cause each heating element to perform heating. When the timings at which the first energizing pulse and the second energizing pulses are generated can be evenly distributed within one line period, the timings are evenly distributed within one line period. When the timings cannot be evenly distributed within one line period, the timings are distributed within one line period such that an unevenly distributed portion included in the timings is arranged in an initial period of one line period.