Liquid discharge apparatus and head drive control device

A liquid discharge apparatus, comprising:

• a liquid discharge head including a nozzle to discharge liquid;
• circuitry configured to:
• generate and output a common drive waveform including a drive pulse for discharging liquid from the nozzle of the liquid discharge head;
• select a waveform portion of the drive pulse to be applied to a pressure generating element of the liquid discharge head;
• and
• output a selection signal for designating the waveform portion selected,
• wherein the drive pulse includes at least an expansion waveform element for expanding a pressure chamber of the liquid discharge head and a holding waveform element for holding a state expanded by the expansion waveform element,
• wherein the selection signal includes a deselection signal for deselecting at least a part of a waveform portion preceding the expansion waveform element having, as a terminal, a state held by the holding waveform element,
• wherein the drive pulse includes a first-stage expansion waveform element for expanding the pressure chamber, a first-stage holding waveform element for holding a state expanded by the first-stage expansion waveform element, and a second-stage expansion waveform element for expanding the pressure chamber from a state held by the first-stage holding waveform element,
• wherein the second-stage expansion waveform element is a waveform element having, as a terminal, the state held by the holding waveform element, and
• wherein the deselection signal is a signal for deselecting a waveform portion that includes at least from a start of the first-stage holding waveform element of the drive pulse to a middle of the first-stage holding waveform element of the drive pulse in the common drive waveform.