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:
Mar. 08, 2022
Filed:
May. 26, 2021
Alps Alpine Co., Ltd., Tokyo, JP;
Kiyoshi Sasai, Miyagi-ken, JP;
Kazufumi Naganuma, Miyagi-ken, JP;
ALPS ALPINE CO., LTD., Tokyo, JP;
Abstract
An electrostatic capacitance sensor includes: at least one detection electrode; drive electrodes, capacitors being respectively formed between the drive electrodes and the at least one detection electrode; a driver capable of causing voltages of the drive electrodes to change independently from each other; a reference voltage generator that generates a reference voltage; a detection signal generator that transfers charge so that a voltage of the at least one detection electrode approaches the reference voltage and that generates a detection signal according to the transfer of the charge; and a controller that controls the driver. The driver is capable of applying the reference voltage to each of the drive electrodes. When the driver causes a voltage of one or more of the drive electrodes to change, the controller controls the driver so as to apply the reference voltage to the remaining drive electrodes.