US 12,341,505 B2
Drive circuit
Kazunori Oshima, Tokyo (JP)
Assigned to TDK CORPORATION, Tokyo (JP)
Appl. No. 17/620,556
Filed by TDK CORPORATION, Tokyo (JP)
PCT Filed Feb. 26, 2021, PCT No. PCT/JP2021/007463
§ 371(c)(1), (2) Date Oct. 3, 2023,
PCT Pub. No. WO2022/180811, PCT Pub. Date Sep. 1, 2022.
Prior Publication US 2024/0022243 A1, Jan. 18, 2024
Int. Cl. B41J 2/045 (2006.01); H03K 17/60 (2006.01); H03K 17/687 (2006.01)
CPC H03K 17/687 (2013.01) [B41J 2/04541 (2013.01); H03K 17/60 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A drive circuit for driving a capacitive load, comprising:
a bridge circuit including a plurality of switch elements and alternately applying a first voltage and a second voltage having mutually different polarities to the capacitive load;
a first rectifier element connected to one end of the capacitive load;
a second rectifier element connected to another end of the capacitive load;
an electric storage element connected to the first rectifier element and the second rectifier element; and
a control circuit controlling the plurality of switch elements in such a way that electric charge stored in the capacitive load moves to the electric storage element via the first rectifier element when a voltage applied to the capacitive load transitions from the first voltage to the second voltage and electric charge stored in the capacitive load moves to the electric storage element via the second rectifier element when a voltage applied to the capacitive load transitions from the second voltage to the first voltage.