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公开(公告)号：US11188166B2
公开(公告)日：2021-11-30
申请号：US16836380
申请日：2020-03-31
Applicant: Alps Alpine Co., Ltd.
Inventor： Tatsumi Fujiyoshi , Hiroshi Shigetaka
IPC: G06F3/041 , H01L41/04 , H01L41/047 , H01L41/113
Abstract: An input device that inputs information corresponding to a change in pressure due to load includes: a first charge detection circuit that outputs a first detection signal corresponding to charges generated in a first piezoelectric sensor and a second piezoelectric sensor; and a switch circuit provided on a path through which the charges are transmitted from the first and second piezoelectric sensors to the first charge detection circuit. The first charge detection circuit alternately iterates a first period in which a first charge is input from a first positive electrode via the switch circuit and a second period in which a second charge is input from a second negative electrode via the switch circuit, reverses a sign of one of the first and second charges, combines a resulting charge with the other charge, and outputs the first detection signal corresponding to the amount of accumulation of the combined charge.
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公开(公告)号：US12174047B2
公开(公告)日：2024-12-24
申请号：US18162507
申请日：2023-01-31
Applicant: Alps Alpine Co., Ltd.
Inventor： Tatsumi Fujiyoshi , Atsushi Matsuda
Abstract: A capacitance detection device includes at least one detection electrode, a shield electrode disposed in close vicinity of the detection electrode, an AC signal source that supplies an AC signal to the shield electrode, a detection circuit that detects capacitance between a physical object in close vicinity of the detection electrode and the detection electrode on the basis of a detection signal output from the detection electrode and the AC signal output from the AC signal source, and a phase adjustment circuit provided between the AC signal source and the shield electrode. The phase adjustment circuit advances the phase of the AC signal output from the AC signal source.
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公开(公告)号：US12019109B2
公开(公告)日：2024-06-25
申请号：US17721238
申请日：2022-04-14
Applicant: Alps Alpine Co., Ltd.
Inventor： Tatsumi Fujiyoshi
IPC: G01R27/26 , G01R15/16 , G01R19/165 , G01R19/30 , G01R27/00 , G01V3/08 , G06F3/041 , G06F3/044 , H03K17/955
CPC classification number: G01R27/2605 , G06F3/044 , H03K17/955 , H03K2217/96071
Abstract: A capacitance detection device detecting a capacitance between a detection electrode and a detection target close to the detection electrode has: a first voltage output circuit that outputs a first alternating current voltage to be supplied to a shield electrode placed close to the detection electrode; a second voltage output circuit that outputs a second alternating current voltage with substantially the same frequency as the first alternating current voltage; and an operational amplifier that amplifies the difference in voltage between an inverting input terminal connected to the detection electrode and a non-inverting input terminal to which the second alternating current voltage is applied, and outputs the amplified difference in voltage. With the detection target close to the detection electrode, the second voltage output circuit outputs the second alternating current voltage adjusted so that an output voltage from the operational amplifier has a smaller amplitude than the first alternating current voltage.
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公开(公告)号：US11599222B2
公开(公告)日：2023-03-07
申请号：US17459943
申请日：2021-08-27
Applicant: Alps Alpine Co., Ltd.
Inventor： Tatsumi Fujiyoshi
Abstract: This detection device includes a sensor electrode, a shield electrode, which has a parasitic capacitance between the sensor electrode and the shield electrode and is driven by an AC voltage, a detection circuit, which is electrically connected to the sensor electrode and the shield electrode and detects the electrostatic capacitance of the sensor electrode, a capacitor, which is connected in series between the sensor electrode and the detection circuit, and a bias unit, which biases the potential of the sensor electrode via a resistor.
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公开(公告)号：US10942613B2
公开(公告)日：2021-03-09
申请号：US16558395
申请日：2019-09-03
Applicant: ALPS ALPINE CO., LTD.
Inventor： Tatsumi Fujiyoshi
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.
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Patent Agency Ranking
公开(公告)号：US11511605B2
公开(公告)日：2022-11-29
申请号：US16818101
申请日：2020-03-13
Applicant: ALPS ALPINE CO., LTD.
Inventor： Tatsumi Fujiyoshi , Hiroshi Shigetaka , Daisuke Takai
Abstract: An operation input device includes a resistance element to generate a capacitance between an operating medium and the resistance element in response to an approach of the operating medium to the resistance element, and a power source to supply electric charge to one end and the other end of the resistance element. A first electric unit measures a first electric charge transfer amount supplied to the one end of the resistance element in response to generation of the capacitance. A second unit measures a second electric charge transfer amount supplied to the other end of the resistance element in response to generation of the capacitance. A controller is connected to the first and second units, and detects a position of the operating medium in a direction perpendicular to a surface of the resistance element based on a sum of the first and second electric charge transfer amounts.
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公开(公告)号：US10817114B2
公开(公告)日：2020-10-27
申请号：US16441665
申请日：2019-06-14
Applicant: ALPS ALPINE CO., LTD.
Inventor： Kiyoshi Sasai , Tatsumi Fujiyoshi , Shinichi Sagawai
Abstract: A capacitance detection device includes a first voltage output circuit configured to output a first alternating current voltage supplied to a shield electrode provided proximate to a detection electrode, a second voltage output circuit configured to output a second alternating current voltage whose frequency and phase are the same as that of the first alternating current voltage and whose amplitude is less than that of the first alternating current voltage, and a current output circuit configured to output a driving current Is to the detection electrode so that the difference between the voltage of the detection electrode and the second alternating current voltage becomes smaller, and output a detection signal corresponding to the driving current. The second voltage output circuit outputs a second alternating current voltage whose amplitude is adjusted so that the driving current in the absence of the object proximate to the detection electrode.
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公开(公告)号：US11131566B2
公开(公告)日：2021-09-28
申请号：US16902905
申请日：2020-06-16
Applicant: Alps Alpine Co., Ltd.
Inventor： Tatsumi Fujiyoshi
Abstract: An electrostatic sensor detecting a position of an object being approaching the electrostatic sensor includes a first electrode group including electrodes, a second electrode group including electrodes adjacent to the electrodes of the first electrode group, detection circuits connected to electrodes selected from among the electrodes of the first and second electrode groups and having first alternating-current sources and current measurement units, a second alternating-current source connected to unselected electrodes among the electrodes of the first and second electrode groups, and a controller. The controller successively selects electrodes to be connected to the detection circuits from among the electrodes of the first and second electrode groups, causes the selected electrodes to be connected to the detection circuits, and detects a position of the object based on current detected by the current measurement units.
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公开(公告)号：US10511290B2
公开(公告)日：2019-12-17
申请号：US15950327
申请日：2018-04-11
Applicant: ALPS ALPINE CO., LTD.
Inventor： Akira Asao , Kiyoshi Sasai , Tatsumi Fujiyoshi
Abstract: In a sine-wave multiplier, signal components included in an output signal Qu1 and corresponding to the product of a third-order harmonic component of a first square wave W1 and an input signal Vi and the product of a fifth-order harmonic component of the first square wave W1 and the input signal Vi are offset by a signal component included in an output signal Qu2 and corresponding to the product of a fundamental component of a second square wave W2 and the input signal Vi and a signal component included in an output signal Qu3 and corresponding to the product of a fundamental component of a second square wave W3 and the input signal Vi.
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公开(公告)号：US11379086B2
公开(公告)日：2022-07-05
申请号：US17331117
申请日：2021-05-26
Applicant: Alps Alpine Co., Ltd.
Inventor： Tatsumi Fujiyoshi
IPC: G06F3/044
Abstract: A proximity detecting device includes: a first detection electrode group having detection electrodes; a second detection electrode group having detection electrodes that orthogonally cross the first detection electrode group; an obliquely crossing detection electrode group having detection electrodes that orthogonally cross the first and second detection electrode groups; a detector capable of detecting electrostatic capacitances of each of the first and second detection electrode groups and the obliquely crossing detection electrode group; and a controller that performs detection through switching between a first detection mode in which a proximity state of a detection-target object is determined based on the electrostatic capacitances of the first and second detection electrode groups and a second detection mode in which a proximity state of each of a plurality of detection-target objects is determined based on the electrostatic capacitances of the first and second detection electrode groups and the obliquely crossing detection electrode group.
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