LIQUID DISCHARGE APPARATUS, HEAD UNIT, AND CONTROL METHOD OF LIQUID DISCHARGE APPARATUS

摘要

A liquid discharge apparatus includes: a piezoelectric element that is displaced according to a voltage of a drive signal; a cavity which is filled with a liquid and of which an inside volume is changed due to the displacement of the piezoelectric element; a nozzle that communicates with the cavity and is capable of discharging the liquid; a charge source that supplies a charge to the piezoelectric element; and a connection path selecting section that causes the piezoelectric element and the charge source to be electrically connected to each other by using a first signal path or a second signal path. The charge source includes: a first auxiliary power source that outputs two types or more of voltages; and a second auxiliary power source that outputs three types or more of voltages by using the two types or more of voltages output from the first auxiliary power source.

主权项

1. A liquid discharge apparatus comprising:
a piezoelectric element that is displaced according to a voltage of a drive signal; a cavity which is filled with a liquid and of which an inside volume is expanded and contracted due to the displacement of the piezoelectric element; a nozzle that communicates with the cavity and is capable of discharging the liquid by the expansion and contraction of the inside volume of the cavity; a charge source that supplies a charge to the piezoelectric element; a first signal path to which a first voltage is applied by the charge source; a second signal path to which a second voltage that is higher than the first voltage is applied by the charge source; and a connection path selecting section that causes the piezoelectric element and the charge source to be electrically connected to each other by using the first signal path or the second signal path according to the voltage of a control signal that controls the voltage of the drive signal and a hold voltage of the piezoelectric element, wherein the charge source includes:
a first auxiliary power source that outputs two types or more of voltages; anda second auxiliary power source that outputs three types or more of voltages which is used to be applied to the piezoelectric element by using the two types or more of voltages output from the first auxiliary power source.