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. 25, 2022
Filed:
Jul. 29, 2020
Seiko Epson Corporation, Tokyo, JP;
Masuhide Ikeda, Matsumoto, JP;
Abstract
An electrostatic protection circuit that is electrically connected to a first terminal to which a first voltage signal is input, a second terminal to which a second voltage signal is input, and a connection terminal that is connected to an external circuit, and mitigates the influence of a surge voltage on an internal circuit, the electrostatic protection circuit including: a first protection circuit that is electrically connected to the first terminal and the second terminal; and a second protection circuit that is electrically connected to the first terminal and the connection terminal, and the second protection circuit including: a first diode element whose anode is electrically connected to the connection terminal, and whose cathode is electrically connected to the first terminal, a thyristor element whose cathode is electrically connected to the connection terminal, a voltage limiting element that is electrically connected to an anode of the thyristor element, and a trigger element that is electrically connected to a gate of the thyristor element, and causes the thyristor element to operate.