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:
Jan. 06, 2026
Filed:
Mar. 21, 2024
Seiko Epson Corporation, Tokyo, JP;
Dai Nozawa, Matsumoto, JP;
Noritaka Ide, Shiojiri, JP;
Kunio Tabata, Shiojiri, JP;
Rika Tanimoto, Matsumoto, JP;
Satoru Uematsu, Shiojiri, JP;
SEIKO EPSON CORPORATION, , JP;
Abstract
A drive circuit includes a modulation circuit that modulates a base drive signal, and outputs a modulation signal, an amplification circuit that outputs a first amplified modulation signal obtained by amplifying the modulation signal, a level switching signal generation circuit that generates a level switching signal, a level shift circuit that outputs the first amplified modulation signal as a second amplified modulation signal when the level switching signal has the first potential, and outputs, as the second amplified modulation signal, a signal obtained by shifting a potential of the first amplified modulation signal when the level switching signal has the second potential, and a demodulation circuit that demodulates the second amplified modulation signal. A threshold when the level switching signal generation circuit switches from the first potential to the second potential is different from a threshold when switching from the second potential to the first potential.