US 11,987,048 B2
Driving device and method for controlling driving device
Daichi Orihara, Nagano (JP); and Masashi Kamiyanagi, Nagano (JP)
Assigned to Seiko Epson Corporation, Tokyo (JP)
Filed by SEIKO EPSON CORPORATION, Tokyo (JP)
Filed on Dec. 20, 2021, as Appl. No. 17/645,067.
Claims priority of application No. 2020-212702 (JP), filed on Dec. 22, 2020.
Prior Publication US 2022/0194077 A1, Jun. 23, 2022
Int. Cl. B41J 2/45 (2006.01); B41J 2/045 (2006.01); B41J 2/14 (2006.01)
CPC B41J 2/0455 (2013.01) [B41J 2/04541 (2013.01); B41J 2/04581 (2013.01); B41J 2/14233 (2013.01)] 7 Claims
OG exemplary drawing
 
1. A driving device comprising:
a piezoelectric element including a driving electrode, wherein the piezoelectric element is driven by a driving signal supplied through a first wire to the driving electrode;
a first switch that performs switching whether to electrically couple the first wire to the driving electrode;
a detection circuit that detects, via a second wire, a vibration produced in the piezoelectric element driven by the driving signal, as a potential change in the driving electrode;
a second switch that performs switching whether to electrically couple the second wire to the driving electrode; and
a determination circuit that determines a state of the piezoelectric element, wherein
the second switch
remains off during a first period,
remains on during a second period subsequent to the first period,
remains off during a third period subsequent to the second period, and
remains on during a fourth period subsequent to the third period,
the determination circuit determines a state of the piezoelectric element, based on a detection result of the detection circuit in at least part of the fourth period, and
the first switch remains off continuously from a timing in the second period to a timing in the third period.