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:
Sep. 15, 2026
Filed:
Sep. 27, 2024
Seiko Epson Corporation, Tokyo, JP;
Dai Nozawa, Matsumoto, JP;
Noritaka Ide, Shiojiri, JP;
SEIKO EPSON CORPORATION, , JP;
Abstract
A drive circuit board includes a drive circuit that includes a first driver circuit, a first switching element pair configured to output a first switching signal, a second driver circuit, a second switching element pair configured to output a second switching signal corresponding to the first switching signal, a smoothing circuit configured to output the drive signal obtained by smoothing the second switching signal, and a bootstrap circuit that includes a first capacitor, shifts a level of a power supply voltage to be supplied to the first switching element pair, and supplies the power supply voltage to the second switching element pair, wherein a distance between the first capacitor and the first switching element pair is longer than a distance between the first capacitor and the second switching element pair.