US 11,731,421 B2
Liquid ejecting apparatus control method and liquid ejecting apparatus
Hiromu Miyazawa, Azumino (JP); Kinya Ozawa, Shiojiri (JP); and Jiro Kato, Suwa (JP)
Assigned to Seiko Epson Corporation, Tokyo (JP)
Filed by SEIKO EPSON CORPORATION, Tokyo (JP)
Filed on Jul. 6, 2022, as Appl. No. 17/810,933.
Application 17/810,933 is a continuation of application No. 17/036,319, filed on Sep. 29, 2020, granted, now 11,458,728.
Claims priority of application No. 2019-179651 (JP), filed on Sep. 30, 2019.
Prior Publication US 2022/0332108 A1, Oct. 20, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. B41J 2/055 (2006.01); B41J 2/165 (2006.01); B41J 2/185 (2006.01)
CPC B41J 2/055 (2013.01) [B41J 2/165 (2013.01); B41J 2/185 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A method of controlling a liquid ejecting apparatus, the liquid ejecting apparatus including
a pressure chamber that communicates with a nozzle that ejects a liquid,
a drive element that changes a pressure of the liquid in the pressure chamber, and
a drive circuit that supplies the drive element with an ejection pulse that generates a change in the pressure that ejects the liquid from the nozzle,
the method comprising:
specifying a surface tension of the liquid in the nozzle from a residual vibration when the pressure of the liquid in the pressure chamber is changed; and
controlling a waveform of the ejection pulse according to the surface tension.