CN112602046A - 电容检测电路、触控芯片及电子设备 - Google Patents

电容检测电路、触控芯片及电子设备 Download PDF

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Publication number
CN112602046A
CN112602046A CN201980001389.2A CN201980001389A CN112602046A CN 112602046 A CN112602046 A CN 112602046A CN 201980001389 A CN201980001389 A CN 201980001389A CN 112602046 A CN112602046 A CN 112602046A
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branch
cancellation
module
detection capacitor
control
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CN201980001389.2A
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CN112602046B (zh
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袁广凯
蒋宏
唐智
沈海明
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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
    • G06—COMPUTING; CALCULATING OR 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; CALCULATING OR 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
    • G06F3/0418—Control or interface arrangements specially adapted for digitisers for error correction or compensation, e.g. based on parallax, calibration or alignment
    • G06F3/04182—Filtering of noise external to the device and not generated by digitiser components
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR 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
    • G06F3/0418—Control or interface arrangements specially adapted for digitisers for error correction or compensation, e.g. based on parallax, calibration or alignment
    • G06F3/04186—Touch location disambiguation
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR 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
    • H03K2217/96071—Capacitive touch switches characterised by the detection principle
    • H03K2217/960725—Charge-transfer

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

Abstract

一种电容检测电路、触控芯片及电子设备，电容检测电路，其包括：控制模块、驱动模块、抵消模块以及电荷转移模块，所述驱动模块用于在所述控制模块的控制下通过第一充电支路对检测电容进行正向充电，或者，通过第二充电支路对所述检测电容进行反向充电；所述抵消模块用于在所述控制模块的控制下通过第一抵消支路对所述检测电容进行基础电容量的抵消处理，或者，在所述控制模块的控制下通过第二抵消支路对所述检测电容进行所述基础电容量的抵消处理；所述电荷转移模块用于对所述检测电容的电荷进行转移处理以生成输出电压。该电容检测电路提高了自电容检测的灵敏度，最终提高了自电容检测的准确度。

Description

PCT国内申请，说明书已公开。

Claims (30)

  1. PCT国内申请，权利要求书已公开。
CN201980001389.2A 2019-08-01 2019-08-01 电容检测电路、触控芯片及电子设备 Active CN112602046B (zh)

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CN114063819B (zh) * 2021-11-15 2024-07-09 深圳天德钰科技股份有限公司 一种触控***重心信号处理电路及含有该电路的电子装置

Citations (4)

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CN104049822A (zh) * 2014-06-18 2014-09-17 深圳贝特莱电子科技有限公司 一种触摸屏控制电路的检测***
CN107980115A (zh) * 2017-11-08 2018-05-01 深圳市汇顶科技股份有限公司 电容检测装置、触控装置和终端设备
CN108124464A (zh) * 2017-12-13 2018-06-05 深圳市汇顶科技股份有限公司 确定抵消支路的控制参数的方法及其装置、触控检测装置
CN108475155A (zh) * 2018-03-30 2018-08-31 深圳市为通博科技有限责任公司 电容检测电路、触摸检测装置和终端设备

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JP2010282539A (ja) * 2009-06-08 2010-12-16 Sanyo Electric Co Ltd 静電容量型タッチセンサ用の信号処理回路
US8952927B2 (en) * 2012-05-18 2015-02-10 Atmel Corporation Self-capacitance measurement with compensated capacitance
TW201520865A (zh) * 2013-11-28 2015-06-01 Anapex Technology Inc 利用電荷複製方式感測電容變化之電容感測電路
WO2017043821A1 (ko) * 2015-09-07 2017-03-16 삼성전자 주식회사 호버 감지를 위한 좌표 측정 장치 및 방법
WO2020047844A1 (zh) * 2018-09-07 2020-03-12 深圳市汇顶科技股份有限公司 电容检测电路、触控芯片及电子设备

Patent Citations (4)

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CN104049822A (zh) * 2014-06-18 2014-09-17 深圳贝特莱电子科技有限公司 一种触摸屏控制电路的检测***
CN107980115A (zh) * 2017-11-08 2018-05-01 深圳市汇顶科技股份有限公司 电容检测装置、触控装置和终端设备
CN108124464A (zh) * 2017-12-13 2018-06-05 深圳市汇顶科技股份有限公司 确定抵消支路的控制参数的方法及其装置、触控检测装置
CN108475155A (zh) * 2018-03-30 2018-08-31 深圳市为通博科技有限责任公司 电容检测电路、触摸检测装置和终端设备

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EP3798808B1 (en) 2022-10-12
CN112602046B (zh) 2022-06-07
EP3798808A4 (en) 2021-05-19
US11326907B2 (en) 2022-05-10
WO2021016991A1 (zh) 2021-02-04
EP3798808A1 (en) 2021-03-31
US20210033426A1 (en) 2021-02-04

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