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. 31, 2023
Filed:
Sep. 30, 2020
Seiko Epson Corporation, Tokyo, JP;
Takayuki Yonemura, Nagano, JP;
SEIKO EPSON CORPORATION, Tokyo, JP;
Abstract
A physical quantity detection device including a container that accommodates a detection object formed of a dielectric, a first electrode provided at an outer side of the container, a second electrode that is provided separately from and to face the first electrode, and an electrostatic capacitance detector that detects an electrostatic capacitance between the first electrode and the second electrode. The electrostatic capacitance detector includes a waveform generation source coupled to the first electrode and a voltage detection circuit coupled to the second electrode. A relationship of |Zc|/|Z1|+|Zc|>|Zc|/|Z2|+|Zc| is satisfied in which |Zc| is an absolute value of an input impedance of the electrostatic capacitance detector, |Z1| is an absolute value of an impedance when the detection object is present between the first electrode and the second electrode, and |Z2| is an absolute value of an impedance when no detection object is present between the first electrode and the second electrode.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile