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:
Sep. 30, 2025
Filed:
Nov. 17, 2023
Seiko Epson Corporation, Tokyo, JP;
SEIKO EPSON CORPORATION, , JP;
Abstract
A liquid ejecting head includes: a piezoelectric element that includes a first drive electrode, a piezoelectric body, and a second drive electrode in a lamination direction; a vibration plate that is provided on one side of the lamination direction with respect to the piezoelectric element and is deformed by driving of the piezoelectric element; a pressure chamber substrate that is provided on the one side of the lamination direction with respect to the vibration plate and is provided with a plurality of pressure chambers; an interlayer that is laminated on at least one of the piezoelectric body, the vibration plate, or the pressure chamber substrate and of which capacitance changes according to humidity; a first detection electrode that is in contact with the interlayer; and a second detection electrode that is in contact with the interlayer and is disposed to be separated from the first detection electrode.