Drive waveform generation device, drive waveform generation method and program, liquid jetting device, and printing apparatus

A drive waveform generation device comprising:

• one or more processors;
• and
• one or more memories that store instructions executed by the one or more processors,
• wherein the one or more processors generate a drive waveform for driving a liquid droplet jetting element of a liquid jetting head having a nozzle that jets a liquid droplet, a pressure chamber that communicates with the nozzle, and the liquid droplet jetting element that pressurizes a liquid in the pressure chamber according to a supplied drive waveform,
• the drive waveform includes, within one drive period, a jetting pulse group including one or more jetting pulses for jetting the liquid droplet from the nozzle, and a voltage swing for preventing the liquid droplet from being jetted from the nozzle,
• three or more voltage swings are disposed after a first jetting pulse which is a last jetting pulse in the jetting pulse group,
• a start end of a first voltage swing, which is the voltage swing immediately after the first jetting pulse, is disposed at a position separated from a start end of the first jetting pulse by a first time,
• a start end of a second voltage swing, which is the voltage swing immediately after the first voltage swing, is disposed at a position separated from the start end of the first voltage swing by a second time,
• wherein a resonance pulse period is a period of two jetting pulses in which a velocity of the liquid droplet jetted in the two jetting pulses is the fastest, wherein the first time is 80% or more and 120% or less of the resonance pulse period, and
• wherein a resonance pulse width is a pulse width of one jetting pulse in which a velocity of the liquid droplet jetted in the one jetting pulse is the fastest, wherein the second time is 80% or more and 120% or less of the resonance pulse width.