Title:
ELECTROSTATIC CAPACITANCE DETECTION DEVICE AND INPUT DEVICE
Document Type and Number:
WIPO Patent Application WO/2022/074963
Kind Code:
A1
Abstract:
A first detection signal generation unit 10 has detection nodes N1-1, N1-2 which are respectively connected to detection electrodes Ea-1, Ea2, supplies electric charges from the detection nodes N1-1, N1-2 to the detection electrodes Ea-1, Ea2 via second wires W2-1, W2-2 so that voltages at the detection nodes N1-1, N1-2 oscillate in accordance with an AC voltage Vas, and generates first detection signals D1-1, D1-2 in accordance with the supplied electric charges. First filters F1-1, F1-2 are provided to first paths P1-1, P1-2 that branch from an AC output node N3 to a plurality of first wires W1. A phase difference signal generation unit 40-1 generates a phase difference signal P1 in accordance with the phase difference between the first detection signal D1-1 and the AC voltage Vas.
Inventors:
IIKURA AKIHISA (JP)
OI MOTOSHI (JP)
SASAKI TOMOYA (JP)
OI MOTOSHI (JP)
SASAKI TOMOYA (JP)
Application Number:
PCT/JP2021/031977
Publication Date:
April 14, 2022
Filing Date:
August 31, 2021
Export Citation:
Assignee:
ALPS ALPINE CO LTD (JP)
International Classes:
G01R27/26; G01B7/00; G01R31/54
Foreign References:
| JP2020113960A | 2020-07-27 | |||
| JP2020010198A | 2020-01-16 | |||
| JP2011169783A | 2011-09-01 | |||
| JP2010266338A | 2010-11-25 | |||
| US20130320994A1 | 2013-12-05 |
Attorney, Agent or Firm:
MATSUSHITA Masahiro (JP)
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