公开(公告)号：US20240011801A1

公开(公告)日：2024-01-11

申请号：US18472567

申请日：2023-09-22

Applicant: ALPS ALPINE CO., LTD.

Inventor： Tatsumi FUJIYOSHI ,  Tetsuya SUZUKI ,  Shinichi HIGUCHI ,  Yoshinao TANIGUCHI

IPC: G01D5/24 ,  G06F3/041 ,  G06F3/044

CPC classification number: G01D5/2405 ,  G06F3/04166 ,  G06F3/044 ,  G06F2203/04107 ,  G06F2203/04108

Abstract: A capacitive sensor has: one or more front-side electrodes including at least one detection electrode; an elastic dielectric body disposed below the front-side electrodes; a shield electrode disposed below the elastic dielectric body; a first, second, and third voltage output unit that respectively outputs a first, second, and third AC voltage; and a detection unit that detects a proximity, a contact, and pressing of a detection target to the detection electrode. The first, second, and third AC voltages have substantially the same frequency. The amplitude of the first AC voltage is larger than or equal to the amplitude of the second AC voltage. The amplitude of the third AC voltage is smaller than the amplitude of the second AC voltage. The first AC voltage is output to a driving unit coupled to the detection electrode with capacitances intervening between them. The second AC voltage is applied to the detection electrode.

公开(公告)号：US20210255739A1

公开(公告)日：2021-08-19

申请号：US17308811

申请日：2021-05-05

Applicant: Alps Alpine Co., Ltd.

Inventor： Junji HASHIDA ,  Toru TAKAHASHI ,  Toru SAWADA ,  Yoshifumi MASUMOTO ,  Shinichi HIGUCHI ,  Koji TSUKAMOTO ,  Tomoyuki YAMAI ,  Akihiro TAKEDA ,  Sadakazu SHIGA

IPC: G06F3/044 ,  G06F3/041

Abstract: In an input device capable of reliably detecting, when an operator brings an operating body close to or into contact with an operation plane, absolute position information irrespective of a contact area size, third electrode arrays are disposed closer to the operation plane relative to second electrode arrays in a normal direction of the operation plane, the second electrode arrays have a portion protruding from the corresponding third electrode arrays when viewed in the normal direction, and assuming that a change amount of electrostatic capacitance between first and third electrode arrays occurred by an operation of the operating body is denoted by ΔC1 and a change amount of electrostatic capacitance between the first and second electrode arrays occurred by an operation of the operating body is denoted by ΔC2, a position of the operating body in the normal direction is calculated based on a ratio ΔC1/ΔC2.