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. 03, 2026
Filed:
Mar. 08, 2024
Seiko Epson Corporation, Tokyo, JP;
Noritaka Ide, Shiojiri, JP;
Kunio Tabata, Shiojiri, JP;
Dai Nozawa, Matsumoto, JP;
Rika Tanimoto, Matsumoto, JP;
Satoru Uematsu, Shiojiri, JP;
SEIKO EPSON CORPORATION, , JP;
Abstract
A drive circuit includes a modulation circuit that outputs a modulation signal, an amplification circuit that outputs a first amplified modulation signal obtained by amplifying the modulation signal, a reference signal generation circuit that generates a reference signal corresponding to the base drive signal, a level switching signal generation circuit that receives, as an input, the reference signal, and generates a level switching signal, a level shift circuit that outputs the first amplified modulation signal, or outputs a signal obtained by shifting a potential of the first amplified modulation signal, a demodulation circuit that demodulates the second amplified modulation signal, and outputs the drive signal, and a feedback circuit that outputs a first feedback signal in response to the drive signal. The level switching signal generation circuit switches a potential of the level switching signal in response to the reference signal and the first feedback signal.