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:
Dec. 31, 2024
Filed:
Jan. 27, 2023
Riso Technologies Corporation, Tokyo, JP;
Yasuhito Kiji, Mishima Shizuoka, JP;
RISO Technologies Corporation, Tokyo, JP;
Abstract
According to one embodiment, a liquid ejection head includes a nozzle plate, pressure chambers, actuators, and a drive circuit. The nozzle plate includes nozzles for ejecting liquid. The pressure chamber communicates with the nozzles. The actuator varies the volume of the pressure chamber according to a drive signal. The drive circuit generates the drive signal for driving the actuator. The ejection waveform in the drive signal includes an expansion potential difference changes that changes in stages and a contraction potential difference change that changes in stages. The drive circuit sets the timing of the stages to cancel the vibration of an acoustic resonance frequency in a frequency range higher than a main acoustic resonance frequency of the liquid in the pressure chamber.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile