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. 08, 2020
Filed:
Mar. 25, 2019
Seiko Epson Corporation, Tokyo, JP;
Tomokazu Yamada, Shiojiri, JP;
Motonori Chikamoto, Shiojiri, JP;
Abstract
A print head includes a first piezoelectric element that includes a first electrode supplied with a drive signal and a second electrode supplied with a reference voltage signal and is displaced by a difference in electric potential between the first electrode and the second electrode, a cavity that is filled with a liquid ejected from a nozzle along with the displacement of the first piezoelectric element, a vibration plate that is disposed between the cavity and the first piezoelectric element, a first switch circuit that switches between supplying and not supplying the drive signal to the first electrode, and a second switch circuit that switches between electrically connecting and not electrically connecting the first electrode and the second electrode depending on an electric potential of the drive signal.