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公开(公告)号：US20240126393A1
公开(公告)日：2024-04-18
申请号：US18466161
申请日：2023-09-13
Applicant: Alps Alpine Co., Ltd.
Inventor： Teiichi Ichikawa , Shohei Yoshida
IPC: G06F3/042
CPC classification number: G06F3/0421 , G06F2203/04108
Abstract: A proximity detection device according to the present invention includes: a plurality of light emitting elements; a plurality of light receiving elements; a drive circuit configured to sequentially drive the plurality of light emitting elements; a measurement circuit configured to measure a light reception signal of a corresponding light receiving element when the plurality of light emitting elements are sequentially driven; and a control unit configured to i) control a drive current of a light emitting element such that a light emission amount of the light emitting element is suppressed, and ii) amplify a detection signal of a light receiving element to compensate for the suppressed light emission amount during measurement with a relatively short distance between the light emitting element and the light receiving element.
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Patent Agency Ranking
公开(公告)号：US20230289010A1
公开(公告)日：2023-09-14
申请号：US18108295
申请日：2023-02-10
Applicant: ALPS ALPINE CO., LTD.
Inventor： Teiichi Ichikawa
CPC classification number: G06F3/04166 , G06F3/0446 , G06F2203/04108
Abstract: A proximity detection device includes a detection controller and a touch panel. The detection controller includes a drive unit that drives a sensor line on an X side or a Y side, a measurement unit that measures capacitance Cm, Cpx, and Cpy formed by the sensor line on the X side or the Y side, and a detection unit that performs touch detection or hover detection based on the capacitance Cm, Cpx, and Cpy measured by the measurement unit. When detecting a hover, the drive unit changes a frequency of the drive signal that drives the sensor line on the X side or the Y side and this improves a hover detection sensitivity.
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公开(公告)号：US11709572B2
公开(公告)日：2023-07-25
申请号：US17666088
申请日：2022-02-07
Applicant: Alps Alpine Co., LTD
Inventor： Teiichi Ichikawa
CPC classification number: G06F3/0446 , G06F3/04166
Abstract: An electrostatic-capacitive proximity detecting device includes an electrode unit including a plurality of electrodes linearly arranged along one direction; an electrostatic capacitance detector that drives the electrodes in a time division manner and detects detection values corresponding to electrostatic capacitances between a to-be-detected object and the respective electrodes; and a position detector that detects a position of the to-be-detected object in the one direction, based on arrangement positions of the respective electrodes in the one direction and a bias in magnitudes of the detection values detected for the respective electrodes by the electrostatic capacitance detector.
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公开(公告)号：US12118165B2
公开(公告)日：2024-10-15
申请号：US18466161
申请日：2023-09-13
Applicant: Alps Alpine Co., Ltd.
Inventor： Teiichi Ichikawa , Shohei Yoshida
IPC: G06F3/042
CPC classification number: G06F3/0421 , G06F2203/04108
Abstract: A proximity detection device according to the present invention includes: a plurality of light emitting elements; a plurality of light receiving elements; a drive circuit configured to sequentially drive the plurality of light emitting elements; a measurement circuit configured to measure a light reception signal of a corresponding light receiving element when the plurality of light emitting elements are sequentially driven; and a control unit configured to i) control a drive current of a light emitting element such that a light emission amount of the light emitting element is suppressed, and ii) amplify a detection signal of a light receiving element to compensate for the suppressed light emission amount during measurement with a relatively short distance between the light emitting element and the light receiving element.
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公开(公告)号：US20220011877A1
公开(公告)日：2022-01-13
申请号：US17363327
申请日：2021-06-30
Applicant: ALPS ALPINE CO., LTD.
Inventor： Teiichi Ichikawa
Abstract: Implementations of a proximity detection device according to the present disclosure include a plurality of light emitting elements and a plurality of light receiving elements arranged in a lower portion of a touch panel display. The proximity detection device detects an object that is in proximity by reflected light received by the light receiving elements when irradiation light from the light emitting elements is reflected by the object. Implementations of a proximity detection device includes a drive circuit sequentially driving the plurality of light emitting elements, a measurement circuit measuring detection levels of the light receiving elements when the plurality of light emitting elements sequentially emit light, respectively, and a control unit having a function to estimate a position in the horizontal direction from a plurality of measurement results and correct the estimated position.
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公开(公告)号：US11416103B2
公开(公告)日：2022-08-16
申请号：US17363327
申请日：2021-06-30
Applicant: ALPS ALPINE CO., LTD.
Inventor： Teiichi Ichikawa
Abstract: Implementations of a proximity detection device according to the present disclosure include a plurality of light emitting elements and a plurality of light receiving elements arranged in a lower portion of a touch panel display. The proximity detection device detects an object that is in proximity by reflected light received by the light receiving elements when irradiation light from the light emitting elements is reflected by the object. Implementations of a proximity detection device includes a drive circuit sequentially driving the plurality of light emitting elements, a measurement circuit measuring detection levels of the light receiving elements when the plurality of light emitting elements sequentially emit light, respectively, and a control unit having a function to estimate a position in the horizontal direction from a plurality of measurement results and correct the estimated position.
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