公开(公告)号：US20210376771A1

公开(公告)日：2021-12-02

申请号：US17207241

申请日：2021-03-19

申请人： TAIYO YUDEN CO., LTD.

发明人： Shigeo ISHII ,  Sumiaki KISHIMOTO ,  Hiroyuki SHIMIZU ,  Takayuki GOTO ,  Yuichi NAMIKAWA

IPC分类号： H02N2/00 ,  G06F3/01

摘要： A driving device generates a driving signal and outputs the driving signal to a piezoelectric element, the driving signal having a waveform obtained by using, as a first modulated wave, a first low-frequency wave having a frequency of 1 Hz or more and less than 100 Hz, using, as a second modulated wave, a waveform obtained by modulating an amplitude of a second low-frequency wave having a frequency of 100 Hz or more and 300 Hz or less with the first modulated wave, and modulating a high-frequency wave having a frequency of 20 kHz or more and 100 kHz or less with the second modulated wave.

公开(公告)号：US20210162458A1

公开(公告)日：2021-06-03

申请号：US16952506

申请日：2020-11-19

申请人： TAIYO YUDEN CO., LTD.

发明人： Shigeo ISHII ,  Takayuki GOTO ,  Sumiaki KISHIMOTO ,  Hiroyuki SHIMIZU ,  Yuichi NAMIKAWA

IPC分类号： B06B1/02 ,  G08B6/00

摘要： Provided is a driving apparatus that sets a signal wave in a low-frequency region having a frequency of 10 Hz or more and 250 Hz or less as a modulating wave and outputs to a piezoelectric actuator a driving signal having a waveform obtained by modulating an amplitude of a sine wave in a high-frequency region having a frequency of 20 kHz or more and 40 kHz or less with the modulating wave.