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:
Mar. 17, 2026
Filed:
Jan. 09, 2024
Seiko Epson Corporation, Tokyo, JP;
Shinichi Yamada, Nagano, JP;
Seiko Epson Corporation, Tokyo, JP;
Abstract
A head unit includes an ejection section that ejects a liquid by a piezoelectric device displaced, a residual vibration detector that detects a residual vibration signal, a first switch that switches whether or not to feed a first drive signal, a second switch that switches whether or not to feed the residual vibration signal, and a controller that controls the first switch and the second switch. The controller acquires a detection start timing based on an extreme point of the residual vibration signal detected by the residual vibration detector, the first switch is switched such that the first drive signal is not fed to the piezoelectric device at the detection start timing, and the second switch is switched such that the residual vibration signal is fed to the residual vibration detector at the detection start timing.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile