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CN112601966A - 电容检测电路、触摸检测装置和电子设备 - Google Patents

电容检测电路、触摸检测装置和电子设备 Download PDF

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Publication number
CN112601966A
CN112601966A CN201980001411.3A CN201980001411A CN112601966A CN 112601966 A CN112601966 A CN 112601966A CN 201980001411 A CN201980001411 A CN 201980001411A CN 112601966 A CN112601966 A CN 112601966A
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China
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capacitor
switch
tested
grounded
charging
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CN112601966B (zh
Inventor
范硕
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Shenzhen Goodix Technology Co Ltd
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Shenzhen Goodix Technology Co Ltd
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    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
    • H03K17/94—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the way in which the control signals are generated
    • H03K17/96—Touch switches
    • H03K17/962—Capacitive touch switches
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
    • G01D5/12—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means
    • G01D5/14—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage
    • G01D5/24—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage by varying capacitance
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
    • G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
    • G01R27/26—Measuring inductance or capacitance; Measuring quality factor, e.g. by using the resonance method; Measuring loss factor; Measuring dielectric constants ; Measuring impedance or related variables
    • G01R27/2605—Measuring capacitance
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R35/00—Testing or calibrating of apparatus covered by the other groups of this subclass
    • G01R35/005—Calibrating; Standards or reference devices, e.g. voltage or resistance standards, "golden" references
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/0416—Control or interface arrangements specially adapted for digitisers
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/0416—Control or interface arrangements specially adapted for digitisers
    • G06F3/04166—Details of scanning methods, e.g. sampling time, grouping of sub areas or time sharing with display driving
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K2217/00—Indexing scheme related to electronic switching or gating, i.e. not by contact-making or -breaking covered by H03K17/00
    • H03K2217/94—Indexing scheme related to electronic switching or gating, i.e. not by contact-making or -breaking covered by H03K17/00 characterised by the way in which the control signal is generated
    • H03K2217/96—Touch switches
    • H03K2217/9607—Capacitive touch switches
    • H03K2217/960705—Safety of capacitive touch and proximity switches, e.g. increasing reliability, fail-safe
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K2217/00—Indexing scheme related to electronic switching or gating, i.e. not by contact-making or -breaking covered by H03K17/00
    • H03K2217/94—Indexing scheme related to electronic switching or gating, i.e. not by contact-making or -breaking covered by H03K17/00 characterised by the way in which the control signal is generated
    • H03K2217/96—Touch switches
    • H03K2217/9607—Capacitive touch switches
    • H03K2217/96071—Capacitive touch switches characterised by the detection principle

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Human Computer Interaction (AREA)
  • Measurement Of Resistance Or Impedance (AREA)

Abstract

一种电容检测电路(100)，具有更优的检测性能。所述电容检测电路(100)包括：第一充放电电路(110)，用于对待测电容器(111)进行充放电；第二充放电电路(120)，用于对校准电容器(121)进行充放电；模数转换电路(130)，用于对充放电过程中所述待测电容器(111)和所述校准电容器(121)的电压差进行连续采样，得到采样数据；数字处理电路(140)，用于根据所述采样数据，检测所述待测电容器(111)的电容。

Description

PCT国内申请，说明书已公开。

Claims (24)

  1. PCT国内申请，权利要求书已公开。
CN201980001411.3A 2019-08-01 2019-08-01 电容检测电路、触摸检测装置和电子设备 Active CN112601966B (zh)

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PCT/CN2019/098922 WO2021017003A1 (zh) 2019-08-01 2019-08-01 电容检测电路、触摸检测装置和电子设备

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US (1) US11481072B2 (zh)
EP (1) EP3798645B1 (zh)
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Cited By (1)

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CN119492923A (zh) * 2025-01-16 2025-02-21 苏州元脑智能科技有限公司 一种板上电容测试电路、电子设备和板上电容测试方法

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KR102910278B1 (ko) * 2019-08-09 2026-01-09 삼성디스플레이 주식회사 터치 구동 회로 및 이를 포함하는 표시 장치
CN113541670B (zh) * 2020-07-21 2024-07-09 腾讯科技（深圳）有限公司 电容检测电路、方法及电子设备
KR102786037B1 (ko) * 2020-08-20 2025-03-24 알프스 알파인 가부시키가이샤 정전 용량 검출 장치, 및, 정전 용량 검출 방법
US11722137B1 (en) * 2020-10-02 2023-08-08 Meta Platforms Technologies, Llc Variable-distance proximity detector
KR20230083399A (ko) * 2021-12-02 2023-06-12 삼성디스플레이 주식회사 센서 장치 및 그 구동 방법
KR20230139904A (ko) 2022-03-25 2023-10-06 삼성디스플레이 주식회사 센서 장치 및 그 구동 방법
CN114706495B (zh) * 2022-04-15 2025-04-25 晟矽微电子(南京)有限公司 触摸检测方法、装置及芯片、电子设备和存储介质
EP4283873B1 (en) * 2022-05-25 2025-05-07 GigaDevice Semiconductor Inc. Frequency-detecting circuit, duty-cycle corrector, and electronic device
CN117220659B (zh) * 2023-09-06 2024-05-17 深圳市航顺芯片技术研发有限公司 触摸按键检测方法、电路及电子设备
CN119550995B (zh) * 2024-12-06 2025-10-21 上海科世达-华阳汽车电器有限公司 一种方向盘的离手检测方法、系统、控制器及装置

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CN119492923A (zh) * 2025-01-16 2025-02-21 苏州元脑智能科技有限公司 一种板上电容测试电路、电子设备和板上电容测试方法

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US20210034179A1 (en) 2021-02-04
WO2021017003A1 (zh) 2021-02-04
EP3798645A4 (en) 2021-04-28
EP3798645B1 (en) 2022-04-27
US11481072B2 (en) 2022-10-25
CN112601966B (zh) 2022-09-13
EP3798645A1 (en) 2021-03-31

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