LIQUID DISCHARGE APPARATUS

摘要

A liquid discharge apparatus includes a power supply potential output section that outputs a first power supply potential, a first and a second switch drive section that generate a first and a second switch drive signal according to a modulation signal of an original drive signal, a first and a second switch that operate according to the first and the second switch drive signal, a rectifying device that is arranged between an output terminal of the power supply potential output section and a terminal of the first switch drive section, a connection node that is electrically connected to the first switch and the second switch, a capacitance element that is arranged between the terminal and the connection node, a signal conversion section that converts a signal which is generated at the connection node, into a drive signal, and a piezoelectric element that is transformed by the drive signal.

主权项

1. A liquid discharge apparatus comprising:
a head driver having
an original driving signal generating section that generates an original driving signal which is a base of a driving signal for driving a head;a signal modulation section that generates a modulation signal by modulating the original driving signal;a signal amplification section that has a first switch and a second switch, and generates an amplified modulation signal by amplifying the modulation signal based on driving of the first switch and the second switch; anda signal conversion section that generates the driving signal by smoothing the amplified modulation signal, wherein when a CPU which controls the head driver outputs a output enable signal, the first switch and the second switch are controlled by the output enable signal so that both the first switch and the second switch are an off state, and the output enable signal controls stopping of output of the modulation signal.