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:
Apr. 29, 2025
Filed:
Feb. 09, 2023
Seiko Epson Corporation, Tokyo, JP;
Kazuyoshi Kegasawa, Hara, JP;
Tadashi Aizawa, Matsumoto, JP;
SEIKO EPSON CORPORATION, , JP;
Abstract
A dielectric heating device includes: an electrode unit including a first electrode and a second electrode that face a to-be-heated object, and configured to heat the to-be-heated object; a voltage application unit configured to apply an alternating-current voltage to the first electrode and the second electrode; a current value detection unit configured to detect a current value of an alternating current that flows through the electrode unit; a phase difference detection unit configured to detect a phase difference between the alternating-current voltage and the alternating current; an impedance detection unit configured to detect an impedance of the electrode unit based on the current value and the phase difference; and a control unit configured to control output of alternating-current power output to the electrode unit by controlling the voltage application unit based on the impedance.