Liquid discharge apparatus

A liquid discharge apparatus comprising:

• a channel member defining a nozzle and a pressure chamber in communication with the nozzle;
• an actuator configured to apply pressure to liquid in the pressure chamber;
• and
• a controller configured to apply a drive signal to the actuator,
• wherein the drive signal includes a rectangular main pulse and a rectangular cancel pulse applied after the rectangular main pulse within one discharge period for forming one dot, the rectangular cancel pulse being smaller in pulse width than the rectangular main pulse,
• the actuator is driven by the drive signal in a pull-and-push method such that the liquid is discharged from the nozzle by increasing volume of the pressure chamber from a predetermined volume and then decreasing the volume of the pressure chamber to the predetermined volume or less, and
• if f (kHz) refers to a drive frequency of the drive signal, if Tw (μsec) refers to a time length from a falling edge of the rectangular main pulse to a rising edge of the rectangular cancel pulse, and if Tc (μsec) refers to a pulse width of the rectangular cancel pulse, then the following expression holds:
• 50≤f≤−11.3×(Tw+Tc)+120.