Liquid discharge apparatus and method for driving liquid discharge head

摘要

A liquid discharge apparatus comprises: a liquid discharge head that discharge a liquid by varying a volume of a pressure chamber with an actuator; a control unit that generates a drive signal that varies the volume of the pressure chamber; and an actuator driving unit that drives the actuator with the drive signal, wherein the drive signal includes a plurality of discharge pulses and a non-discharge pulse, the non-discharge pulse is applied at a time point at which a vibration velocity of a composite residual vibration that is of a liquid near a nozzle and that is generated by the discharge pulses peaks in a direction toward an inside or outside of the nozzle, the time point being synchronized with an intermediate time point between a fall time point and a rise time point of the non-discharge pulse.

主权项

1. A liquid discharge apparatus comprising:
a liquid discharge head that discharges a liquid by varying a volume of a pressure chamber with an actuator; a control unit that generates a drive signal that varies the volume of the pressure chamber; and an actuator driving unit that drives the actuator with the drive signal, wherein the drive signal includes a plurality of discharge pulses and a non-discharge pulse; and wherein the non-discharge pulse is applied at a time point at which a vibration velocity of a composite residual vibration, including a composite of residual vibration of a liquid near a nozzle and that is generated by the discharge pulses, reaches a peak in a direction toward an inside or outside of the nozzle; the time point being synchronized with an offset time point at a middle time point between a fall time point and a rise time point of the non-discharge pulse.