CN111164557A - 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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CN111164557A
CN111164557A CN201880001528.7A CN201880001528A CN111164557A CN 111164557 A CN111164557 A CN 111164557A CN 201880001528 A CN201880001528 A CN 201880001528A CN 111164557 A CN111164557 A CN 111164557A
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capacitor
switch unit
voltage
cancellation
capacitance
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CN111164557B (zh
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蒋宏
唐智
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Shenzhen Goodix Technology Co Ltd
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Shenzhen Goodix Technology Co Ltd
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    • 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
    • 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
    • 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
    • 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
    • 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
    • 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
    • G06F3/0446—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means using a grid-like structure of electrodes in at least two directions, e.g. using row and column electrodes

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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)
  • Position Input By Displaying (AREA)

Abstract

一种电容检测电路、触控芯片及电子设备，该电容检测电路包括：控制模块(112)、电荷转移模块(142)、处理模块(152)、驱动模块(122)以及抵消模块(132)，所述控制模块(112)用于通过控制所述驱动模块(122)对待测电容进行充电处理、所述抵消模块(132)对抵消电容进行充电处理，以及控制所述抵消电容对所述待测电容进行电荷抵消处理；所述电荷转移模块(142)用于对所述抵消处理后所述待测电容的电荷进行转化处理生成输出电压；所述处理模块(152)用于根据所述输出电压确定所述待测电容被外加电场影响前后的电容变化量。当应用于自电容检测时，由于通过电荷抵消可消除或者减小检测到的待测电容的基础电容量，在电容变化量不变的情况下，增加了电容的变化率，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 (14)

  1. PCT国内申请，权利要求书已公开。
CN201880001528.7A 2018-09-07 2018-09-07 电容检测电路、触控芯片及电子设备 Active CN111164557B (zh)

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EP3798808B1 (en) * 2019-08-01 2022-10-12 Shenzhen Goodix Technology Co., Ltd. Capacitance detection circuit, touch chip, and electronic device
KR20210018723A (ko) * 2019-08-09 2021-02-18 삼성디스플레이 주식회사 터치 구동 회로 및 이를 포함하는 표시 장치
CN111309187B (zh) * 2020-03-17 2022-02-22 北京集创北方科技股份有限公司 检测电路、触控面板及电子设备
KR102375320B1 (ko) * 2020-04-24 2022-03-16 관악아날로그 주식회사 용량성 센서를 위한 읽기 회로
CN111880690A (zh) * 2020-08-06 2020-11-03 深圳市汇顶科技股份有限公司 噪声检测电路、自容检测方法、触控芯片及电子设备
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CN111164558B (zh) 2022-06-07
EP3640780A1 (en) 2020-04-22
US10949032B2 (en) 2021-03-16
WO2020048023A1 (zh) 2020-03-12
CN111164557B (zh) 2023-10-20
EP3640779B1 (en) 2022-04-27
WO2020047844A1 (zh) 2020-03-12
US20200110117A1 (en) 2020-04-09
US10990230B2 (en) 2021-04-27
EP3640780B1 (en) 2021-10-27
EP3640780A4 (en) 2020-06-03
US20200081567A1 (en) 2020-03-12
EP3640779A4 (en) 2020-06-24
CN111164558A (zh) 2020-05-15
EP3640779A1 (en) 2020-04-22

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