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. 09, 2021
Filed:
Sep. 03, 2019
Alps Alpine Co., Ltd., Tokyo, JP;
Tatsumi Fujiyoshi, Miyagi-ken, JP;
ALPS ALPINE CO., LTD., Tokyo, JP;
Abstract
Charge is periodically supplied to a detection electrode so that a first alternating current voltage is generated in the detection electrode, and a detection signal corresponding to the supplied charge is created. A second alternating current voltage having the same frequency and phase as the first alternating current voltage is applied to a plurality of driving electrodes. An amplitude pattern, which is a combination of the amplitudes of the second alternating current voltages to be applied to the plurality of driving electrodes is switched according to a predetermined series of amplitude patterns. In each amplitude pattern included in the series of amplitude patterns, the second alternating current voltage having a certain amplitude is applied to the remaining driving electrodes resulting from excluding one driving electrode, and the second alternating current voltage having an amplitude different from the remaining driving electrodes is applied to the one driving electrode.