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:
Apr. 14, 2020
Filed:
Mar. 18, 2019
Seiko Epson Corporation, Tokyo, JP;
Tetsuo Takagi, Nagano, JP;
Seiko Epson Corporation, Tokyo, JP;
Abstract
A liquid ejecting apparatus includes a drive circuit that outputs a drive signal, a criterion voltage circuit that outputs a criterion voltage signal from a criterion voltage-signal output terminal, a piezoelectric element that includes a first electrode to which the drive signal is supplied and a second electrode to which the criterion voltage signal is supplied, a cavity, and a vibration plate which is provided between the cavity and the piezoelectric element. The criterion voltage circuit includes a voltage generation unit that generates the criterion voltage signal, and a voltage detection unit that detects a voltage value of the criterion voltage signal. In a case where the voltage value of the criterion voltage signal is greater than a first threshold, the voltage detection unit stops an operation of the voltage generation unit and electrically connects the criterion voltage-signal output terminal and a ground terminal to each other.