Patent ID: 9680084
Date: 2017-06-13
CPC Classifications: B06B,H01L,H02N

Claim:
1. A piezoelectric element driving apparatus applying a predetermined driving signal to a piezoelectric element to drive the piezoelectric element, comprising: a waveform synthesizing unit outputting first and second digital signals for generating a driving signal; a digital-to-analog converting unit outputting first and second analog signals corresponding to the first and second digital signals, respectively; and an amplifying unit amplifying the first and second analog signals and providing the amplified first and second analog signals to a piezoelectric element, wherein the waveform synthesizing unit generates the first and second digital signals using a plurality of digital values included in a preset lookup table, and wherein the driving signal is an asymmetrical waveform in which amplitudes of first and second polarities thereof are different from each other.