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:
Nov. 25, 2025
Filed:
Sep. 28, 2023
Seiko Epson Corporation, Tokyo, JP;
Sukehiro Ito, Nagano, JP;
Masayuki Kawakami, Nagano, JP;
Seiko Epson Corporation, Tokyo, JP;
Abstract
A liquid ejection apparatus includes a drive signal output circuit that outputs a drive signal and a print head that ejects a liquid, in which the print head includes a temperature detection portion that detects temperature information, the drive signal output circuit includes an amplification circuit that outputs an amplification modulation signal, a smoothing circuit that outputs the drive signal, and a basic drive signal output circuit that outputs a basic drive signal that is corrected based on the temperature information, and a frequency of the amplification modulation signal when the temperature detection portion detects the temperature information used for the basic drive signal output circuit to correct the basic drive signal is higher than a frequency of the amplification modulation signal when the temperature detection portion detects the temperature information not used for the basic drive signal output circuit to correct the basic drive signal.