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US 11,633,761 B2Granted
Driving apparatus, vibration generating apparatus, electronic apparatus, and driving method
AssigneeTaiyo Yuden Co., Ltd.
InventorsShigeo Ishii, Takayuki Goto, Sumiaki Kishimoto, Hiroyuki Shimizu, Yuichi Namikawa
Life of this patent
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Abstract
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.
Claims4
A vibration generating apparatus comprising:
- a vibrating member;
- a piezoelectric actuator bonded to the vibrating member;
- and
- 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 the 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, thereby causing the vibrating member to vibrate via the piezoelectric actuator driven by the driving signal.
1 more element
Dependencies are inferred from the claim text.