US 11,985,902 B2
Driving circuit and driving method
Zhiwei Xu, Zhejiang (CN); Chiqing Fang, Zhejiang (CN); and Chen Zhao, Zhejiang (CN)
Assigned to SILERGY SEMICONDUCTOR TECHNOLOGY HANGZHOU LTD, Zhejiang (CN)
Filed by SILERGY SEMICONDUCTOR TECHNOLOGY (HANGZHOU) LTD, Zhejiang (CN)
Filed on May 20, 2021, as Appl. No. 17/326,063.
Claims priority of application No. 202010431205.0 (CN), filed on May 20, 2020.
Prior Publication US 2021/0367133 A1, Nov. 25, 2021
Int. Cl. H10N 30/80 (2023.01); B06B 1/02 (2006.01); H10N 30/20 (2023.01)
CPC H10N 30/802 (2023.02) [B06B 1/0207 (2013.01); H10N 30/20 (2023.02)] 19 Claims
OG exemplary drawing
 
1. A driving circuit for driving a piezoelectric load, wherein the driving circuit comprises:
a charging circuit configured to receive an input voltage to charge the piezoelectric load; and
a discharging circuit configured to discharge electricity from the piezoelectric load, wherein
during a first operation interval of an operation period, operation states of the charging circuit and the discharging circuit are controlled, so that a power supply voltage signal provided to the piezoelectric load in the first operation interval corresponds to a reference voltage in a first interval; and
during a second operation interval of the operation period, the operation states of the charging circuit and the discharging circuit are controlled, so that the power supply voltage signal in the second operation interval corresponds to the reference voltage in a second interval, wherein during the first operation interval, the discharging circuit is controlled to be cut off and the charging circuit is controlled to adjust the power supply voltage signal to change with the reference voltage in the first interval; and during the second operation interval, the charging circuit is controlled to be cut off and the discharging circuit is controlled to adjust the power supply voltage signal to change with the reference voltage in the second interval.