Driving circuit, liquid discharge apparatus, and driving method

A liquid discharge apparatus comprising:

• a discharge head that includes a piezoelectric element having a first electrode that is supplied a first voltage signal and a second electrode that is supplied a second voltage signal and driven by a potential difference between the first electrode and the second electrode, and that discharges a liquid by driving the piezoelectric element;
• and
• a driving circuit for driving the discharge head, wherein
• the driving circuit includes
• a first voltage signal generation circuit that outputs the first voltage signal,
• a second voltage signal generation circuit that outputs the second voltage signal, and
• a switch circuit in which the first voltage signal is input from one end and the other end is electrically connected to the first electrode,
• a voltage value of the first voltage signal approaches a voltage value of the second voltage signal in a shift period from a first mode that is shifted after power is turned on to a second mode for driving the piezoelectric element.

A driving method of a driving circuit that drives a discharge head which includes a piezoelectric element having a first electrode that is supplied a first voltage signal and a second electrode that is supplied a second voltage signal and driven by a potential difference between the first electrode and the second electrode, and which discharges a liquid by driving the piezoelectric element, wherein

• the driving circuit includes
• a first voltage signal generation circuit that outputs the first voltage signal,
• a second voltage signal generation circuit that outputs the second voltage signal, and
• a switch circuit in which the first voltage signal is input from one end and the other end is electrically connected to the first electrode,
• the method comprises:
• a first step of shifting after power is turned on;
• a second step of driving the piezoelectric element;
• and
• a shift step of shifting from the first step to the second step, and
• in the shift step, the voltage value of the first voltage signal approaches the voltage value of the second voltage signal.