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:
Oct. 13, 2026
Filed:
Oct. 24, 2024
Seiko Epson Corporation, Tokyo, JP;
Toshimichi Yamada, Chino, JP;
SEIKO EPSON CORPORATION, , JP;
Abstract
A head unit includes a drive signal output circuit including a first constant current output circuit for outputting a first constant current signal based on a first DC voltage signal, a second constant current output circuit for outputting a second constant current signal based on a second DC voltage signal, and a selection control circuit for controlling the first constant current output circuit and the second constant current output circuit based on an ejection control signal, the selection control circuit controls whether the first constant current output circuit outputs the first constant current signal and whether the second constant current output circuit outputs the second constant current signal based on the ejection control signal, and the drive signal output circuit outputs a first drive signal corresponding to the first constant current signal and the second constant current signal to a first piezoelectric element.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile