A head unit control device that controls a head unit including a plurality of ejection portions that includes a first ejection portion and a second ejection portion and a determination portion that determines a liquid ejection state of the first and second ejection portion, and includes a reception portion that receives, as one data set, determination result information including first determination information indicating a determination result of the liquid ejection state of the first ejection portion from the determination portion and second determination information indicating a determination result of the liquid ejection state of the second ejection portion from the determination portion, and ejection portion information including information indicating the number of the plurality of ejection portions included in the head unit, from the head unit, and an ejection control portion that controls the plurality of ejection portions based on the one data set received by the reception portion.

A print head includes: an integrated circuit apparatus that switches whether or not to supply drive signals to a plurality of piezoelectric elements, and includes a first circuit block that switches whether or not to supply the drive signal, a second circuit block that switches whether or not to supply the drive signal, a third circuit block that switches whether or not to supply the drive signal, a fourth circuit block, and a first buffer area, a second buffer area, and a third buffer area in which no circuit element is located, in which the first buffer area is located between the first circuit block and the fourth circuit block, the second buffer area is located between the second circuit block and the fourth circuit block, and the third buffer area is located between the third circuit block and the fourth circuit block.

There is provided head including: nozzle configured to discharge liquid by energy generating element; signal generator configured to generate, based on first and second data representing first and second driving waveform, time division multiplex signal including first and second portions of the first driving waveform, and third and fourth portions of the second driving waveform; and separator configured to separate first or second driving waveform signal representing the first or second driving waveform from the time division multiplex signal. The energy generating element is configured to be driven by the first or second driving waveform signal. In the time division multiplex signal, the third portion is aligned between the first and second portions and the second portion is aligned between the third and fourth portions. The time division multiplex signal is capable of transmitting the first and second data via single signal line.

Provided is a liquid discharging apparatus including a drive signal output circuit outputting a drive signal that displaces between a first potential and a second potential, and a discharging portion including a piezoelectric element that is driven based on the drive signal and discharging liquid, in which the drive signal output circuit includes a modulation circuit that outputs a modulation signal obtained by modulating a base drive signal that is a base of the drive signal, an amplification circuit that outputs an amplified modulation signal obtained by amplifying the modulation signal, and a demodulation circuit that includes a capacitor and outputs the drive signal obtained by demodulating the amplified modulation signal, the first potential is 25 V or higher, and the capacitor is a surface mounting component including a laminated portion in which a resin thin film layer and a metal thin film layer are laminated.

The present invention discharges ink from a plurality of inkjet heads and is used when performing drive whereby one droplet or a plurality of droplets are discharged onto and united on one pixel. A drive signal includes a drive waveform comprising N number (N being an integer of at least 2) of drive waveform elements and is configured so as to fulfil the relationship 1.1 Tc≤Ts≤1.4 Tc, when Tc is the natural vibration cycle determined from the inkjet head structure and Ts is the time from the start point of the drive waveform to the start point of the subsequent drive waveform. As a result, velocity deviation caused by the resonant frequency of a piezoelectric actuator driving the inkjet head can be suppressed when driving an inkjet head using multiple gradations.

Provided are an inkjet printing device, a method for printing bipolar elements, and a method for manufacturing a display device. The inkjet printing device includes an inkjet head disposed above a stage and including a plurality of nozzles through which ink including bipolar elements each having areas doped with partially different polarities is discharged; an actuator disposed in the inkjet head and adjusting an amount of droplet of the ink discharged through the plurality of nozzles; and at least one sensing part disposed in the inkjet head and measuring a number of bipolar elements discharged through the plurality of nozzles.

In an example implementation, a method of dual and single drop weight printing includes operating a printing system in a hybrid drop weight print mode to enable ejecting black ink from high drop weight nozzles and low drop weight nozzles, and ejecting color ink from high drop weight nozzles but not from low drop weight nozzles.

A print head assembled to a liquid ejecting apparatus ejecting a liquid with respect to a medium includes an ejecting portion ejecting the liquid in response to a drive signal and an electrically erasable non-volatile memory, and the non-volatile memory stores history information changing in accordance with an operation state of the print head.

The present disclosure relates to a printhead control system for a printer, wherein the printer includes at least one printhead comprising a plurality of nozzles for ejecting printing fluid, wherein the nozzles include high drop weight nozzles and low drop weight nozzles ejecting drops of different drop weight, and are each arranged to eject printing fluid on a print medium such as to print images in frame areas of the print medium and such as to clean nozzles in spit bar areas of the print medium; the printer further includes a transport unit for moving the print medium relative to the printhead, wherein the print medium includes frame areas for printing images and spit bar areas for cleaning the nozzles; the printhead control device including: a module to determine a first group of said nozzles located over a frame area of the print medium and a second group of said nozzles located over a spit bar area of the print medium; a module to operate the high drop weight nozzles of the first group such as to eject printing fluid and print an image in the frame area; a module to operate disable the low drop weight nozzles of the first group such as to not eject printing fluid in the frame area; and a module to operate the high drop weight nozzles and the low drop weight nozzles of the second group such as to alternately eject printing fluid in the spit bar area.

A liquid ejecting apparatus includes a head unit that includes a nozzle that ejects a liquid, a control circuit that outputs a control signal that controls an operation of the head unit, a power supply circuit that supplies a power supply voltage to the head unit, and a liquid container that stores the liquid. The head unit includes a first terminal to which the control signal is input, a second terminal to which the power supply voltage is supplied, and a liquid supply port to which the liquid is supplied, the first terminal and the second terminal are located side by side along a first direction, and the second terminal is located between the first terminal and the liquid supply port in a second direction intersecting the first direction.