US 11,850,841 B2
Liquid ejecting apparatus
Takahiro Katakura, Okaya (JP); and Toshiro Murayama, Fujimi-Machi (JP)
Assigned to Seiko Epson Corporation, Tokyo (JP)
Filed by SEIKO EPSON CORPORATION, Tokyo (JP)
Filed on Nov. 15, 2021, as Appl. No. 17/454,862.
Claims priority of application No. 2020-190758 (JP), filed on Nov. 17, 2020.
Prior Publication US 2022/0153021 A1, May 19, 2022
Int. Cl. B41J 2/045 (2006.01); B41J 2/14 (2006.01)
CPC B41J 2/04571 (2013.01) [B41J 2/04581 (2013.01); B41J 2/14233 (2013.01)] 7 Claims
OG exemplary drawing
 
1. A liquid ejecting apparatus comprising:
a liquid discharge section having
a first pressure chamber,
a first piezoelectric element configured to change an inner volume of the first pressure chamber, and
a nozzle communicating with the first pressure chamber;
a pressure vibration section having
a second pressure chamber and
a second piezoelectric element configured to change an inner volume of the second pressure chamber;
a first common flow path communicating with the first pressure chamber and the second pressure chamber;
a driving signal generation section configured to generate a discharging driving signal to be supplied to the first piezoelectric element and a detection driving signal to be supplied to the second piezoelectric element; and
a vibration detection section configured to detect, based on a change in an electromotive force of the second piezoelectric element, residual vibration of a liquid filled in the second pressure chamber, the change occurring after supply of the detection driving signal, wherein
a viscous resistance of a flow path between the second pressure chamber and the first common flow path is lower than a viscous resistance of a flow path between the first pressure chamber and the first common flow path.