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 an ejection unit which is configured to eject a liquid due to drive of a piezoelectric element, and a drive signal output circuit includes a first switch circuit configured to switch whether to supply a first DC voltage signal to the ejection unit, a second switch circuit configured to switch whether to supply a second DC voltage signal to the ejection unit, and a selection control circuit configured to control the first switch circuit and the second switch circuit, and the first switch circuit includes a first switch element one end of which is supplied with the first DC voltage signal, and another end of which is electrically coupled to the ejection unit, and a second switch element one end of which is supplied with the first DC voltage signal, and another end of which is electrically coupled to the ejection unit.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile