Patent ID: 8971751
Filing Date: 2015-03-03
Classification: G03G,H01L

Abstract:
1. A piezoelectric transducer driver configured to drive a piezoelectric transducer for converting an inputted alternating-current voltage, comprising: a drive circuit configured to generate the alternating-current voltage to be inputted into the piezoelectric transducer; a frequency controller configured to control a frequency of the alternating-current voltage as a drive frequency to be applied to the piezoelectric transducer; and a pulse generation circuit configured to generate a drive pulse having a switching frequency corresponding to the drive frequency and to output the drive pulse to the drive circuit, wherein the drive circuit includes a switching element configured to generate the alternating-current voltage by executing a switching operation corresponding to a pulse width of the drive pulse, wherein the pulse generation circuit changes the pulse width depending on the switching frequency, and wherein the pulse generation circuit comprises: