The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 17, 2026
Filed:
Jan. 15, 2024
Riso Technologies Corporation, Tokyo, JP;
Yasuhito Kiji, Mishima Shizuoka, JP;
RISO Technologies Corporation, Tokyo, JP;
Abstract
A liquid ejection head includes a nozzle plate including a nozzle that ejects a liquid, a pressure chamber that communicates with the nozzle, an actuator configured to vary a volume of the pressure chamber in response to a driving signal, and a drive circuit configured to generate the driving signal. The driving signal includes an ejection waveform for ejecting the liquid and causing: an expansion potential difference for expanding the volume of the pressure chamber, a contraction potential difference for contracting the volume of the pressure chamber, and one or more intermediate potential differences between the expansion potential difference and the contraction potential difference, and a cancellation waveform that includes a trapezoidal wave for suppressing residual oscillation after the ejection of the liquid.