US 12,214,592 B2
Liquid discharge apparatus and method of driving liquid discharge head
Masanori Mikoshiba, Shimosuwa-Machi (JP); Motoki Takabe, Shiojiri (JP); Takanori Aimono, Matsumoto (JP); and Jingling Wang, Shiojiri (JP)
Assigned to Seiko Epson Corporation, Tokyo (JP)
Filed by SEIKO EPSON CORPORATION, Tokyo (JP)
Filed on Feb. 7, 2023, as Appl. No. 18/165,391.
Claims priority of application No. 2022-017221 (JP), filed on Feb. 7, 2022.
Prior Publication US 2023/0249451 A1, Aug. 10, 2023
Int. Cl. B41J 2/045 (2006.01); B41J 2/14 (2006.01)
CPC B41J 2/04588 (2013.01) [B41J 2/04508 (2013.01); B41J 2/04581 (2013.01); B41J 2/14233 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A liquid discharge apparatus comprising:
a diaphragm that has a first surface and a second surface facing in a direction opposite to the first surface;
a pressure chamber substrate laminated on the first surface and including a partition wall partitioning a pressure chamber communicating with a nozzle discharging liquid;
a piezoelectric element laminated on the second surface and including a first active portion that overlaps a center of the pressure chamber when viewed in a thickness direction of the diaphragm and a second active portion that overlaps the pressure chamber at a position closer to an outer edge of the pressure chamber than the first active portion; and
a drive signal generation portion that generates a discharge signal for discharging the liquid from the nozzle by being supplied to one of the first active portion and the second active portion and a correction signal that is supplied to the other of the first active portion and the second active portion, wherein
a potential of the discharge signal changes over time and a potential of the correction signal is constant during a discharge period for discharging the liquid from the nozzle.