CN113287027A - 一种电容检测电路、触控装置、终端设备和电容检测方法 - Google Patents

一种电容检测电路、触控装置、终端设备和电容检测方法 Download PDF

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CN113287027A
CN113287027A CN201980004036.8A CN201980004036A CN113287027A CN 113287027 A CN113287027 A CN 113287027A CN 201980004036 A CN201980004036 A CN 201980004036A CN 113287027 A CN113287027 A CN 113287027A
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circuit
capacitor
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CN113287027B (zh
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范硕
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Shenzhen Goodix Technology Co Ltd
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Shenzhen Goodix Technology Co Ltd
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    • 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
    • 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

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

Abstract

一种电容检测电路、触控装置和终端设备和电容检测方法，有利于提高电容检测的精度。该电容检测电路(100)包括电容转移模块(120)和处理模块(130)。电容转移模块(120)包括充放电子电路(123)、抵消子电路(121)和转移储存子电路(122)。充放电子电路(123)用于对抵消子电路(121)和待测电容器(110)进行充电。抵消子电路(121)用于抵消待测电容器(110)的基础电荷量。转移储存子电路(122)用于在待测电容器(110)及抵消子电路(121)充电后，转移并储存待测电容器(110)和抵消子电路(121)的电荷量的差值。处理模块(130)用于对转移储存子电路(122)两端的电荷差进行处理，并根据电荷差获得待测电容器(110)的电容变化信息。

Description

PCT国内申请，说明书已公开。

Claims (21)

  1. PCT国内申请，权利要求书已公开。
CN201980004036.8A 2019-11-20 2019-11-20 一种电容检测电路、触控装置、终端设备和电容检测方法 Active CN113287027B (zh)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111819451A (zh) * 2020-03-03 2020-10-23 深圳市汇顶科技股份有限公司 电容检测电路、传感器、芯片以及电子设备

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20130307812A1 (en) * 2012-05-18 2013-11-21 Ingar Hanssen Self-Capacitance Measurement with Isolated Capacitance
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系统
CN107112990A (zh) * 2014-12-31 2017-08-29 Iee国际电子工程股份公司 电容传感器
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
CN208013309U (zh) * 2018-01-24 2018-10-26 深圳市汇顶科技股份有限公司 电容检测电路、触控装置和终端设备
CN208506138U (zh) * 2018-01-24 2019-02-15 深圳市汇顶科技股份有限公司 电容检测电路、触摸检测装置和终端设备
CN110196653A (zh) * 2019-04-26 2019-09-03 北京集创北方科技股份有限公司 触摸检测电路、触控显示装置以及触摸检测方法

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6864691B2 (en) * 2001-12-14 2005-03-08 I F M Electronic Gmbh Circuit arrangement for detecting the capacitance or capacitance change of a capacitive circuit element or component

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20130307812A1 (en) * 2012-05-18 2013-11-21 Ingar Hanssen Self-Capacitance Measurement with Isolated Capacitance
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系统
CN107112990A (zh) * 2014-12-31 2017-08-29 Iee国际电子工程股份公司 电容传感器
CN208013309U (zh) * 2018-01-24 2018-10-26 深圳市汇顶科技股份有限公司 电容检测电路、触控装置和终端设备
CN208506138U (zh) * 2018-01-24 2019-02-15 深圳市汇顶科技股份有限公司 电容检测电路、触摸检测装置和终端设备
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
CN110196653A (zh) * 2019-04-26 2019-09-03 北京集创北方科技股份有限公司 触摸检测电路、触控显示装置以及触摸检测方法

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111819451A (zh) * 2020-03-03 2020-10-23 深圳市汇顶科技股份有限公司 电容检测电路、传感器、芯片以及电子设备

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CN113287027B (zh) 2023-04-07

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