CN113785300A - 指纹识别检测电路及其控制方法、指纹识别控制芯片 - Google Patents

指纹识别检测电路及其控制方法、指纹识别控制芯片 Download PDF

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Publication number
CN113785300A
CN113785300A CN202080000507.0A CN202080000507A CN113785300A CN 113785300 A CN113785300 A CN 113785300A CN 202080000507 A CN202080000507 A CN 202080000507A CN 113785300 A CN113785300 A CN 113785300A
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China
Prior art keywords
fingerprint
capacitor
coupled
fingerprint identification
signal
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Pending
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CN202080000507.0A
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English (en)
Inventor
刘彬彬
孟晨
石巍
钟文杰
胡忠
王永波
陆政华
胡大海
刘国
王国安
刘佳荣
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BOE Technology Group Co Ltd
Beijing BOE Sensor Technology Co Ltd
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BOE Technology Group Co Ltd
Beijing BOE Sensor Technology Co Ltd
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Application filed by BOE Technology Group Co Ltd, Beijing BOE Sensor Technology Co Ltd filed Critical BOE Technology Group Co Ltd
Publication of CN113785300A publication Critical patent/CN113785300A/zh
Pending legal-status Critical Current

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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
    • G06V40/00—Recognition of biometric, human-related or animal-related patterns in image or video data
    • G06V40/10—Human or animal bodies, e.g. vehicle occupants or pedestrians; Body parts, e.g. hands
    • G06V40/12—Fingerprints or palmprints
    • G06V40/13—Sensors therefor
    • G06V40/1306—Sensors therefor non-optical, e.g. ultrasonic or capacitive sensing
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
    • G06V40/00—Recognition of biometric, human-related or animal-related patterns in image or video data
    • G06V40/10—Human or animal bodies, e.g. vehicle occupants or pedestrians; Body parts, e.g. hands
    • G06V40/12—Fingerprints or palmprints
    • G06V40/13—Sensors therefor
    • G06V40/1329—Protecting the fingerprint sensor against damage caused by the finger

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  • Engineering & Computer Science (AREA)
  • Human Computer Interaction (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Multimedia (AREA)
  • Theoretical Computer Science (AREA)
  • Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
  • Image Input (AREA)

Abstract

提供一种指纹识别检测电路，指纹识别检测电路包括：运算放大器、串联的积分电容和第一开关、第二开关。运算放大器的同相输入端与参考电压端耦接，运算放大器的反相输入端与指纹感测电容耦接。积分电容和第一开关耦接于运算放大器的反相输入端和运算放大器的输出端之间。第二开关耦接于运算放大器的反相输入端和运算放大器的输出端之间，且第二开关与串联的积分电容和第一开关并联。其中，积分电容被配置为，在第一开关断开，第二开关闭合的情况下放电；在第二开关断开，第一开关闭合的情况下，在指纹感测电容的作用下储电。运算放大器被配置为，在积分电容的作用下输出表征指纹感测电容的电容值的检测信号。

Description

PCT国内申请，说明书已公开。

Claims (20)

  1. PCT国内申请，权利要求书已公开。
CN202080000507.0A 2020-04-10 2020-04-10 指纹识别检测电路及其控制方法、指纹识别控制芯片 Pending CN113785300A (zh)

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PCT/CN2020/084220 WO2021203418A1 (zh) 2020-04-10 2020-04-10 指纹识别检测电路及其控制方法、指纹识别控制芯片

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CN113785300A true CN113785300A (zh) 2021-12-10

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US (1) US11568671B2 (zh)
CN (1) CN113785300A (zh)
WO (1) WO2021203418A1 (zh)

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* Cited by examiner, † Cited by third party
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CN115601795B (zh) * 2022-12-05 2023-04-21 深圳市汇顶科技股份有限公司 电容指纹检测电路、电容指纹检测装置和电子设备

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CN209001929U (zh) * 2018-10-30 2019-06-18 上海工程技术大学 一种全差分开关电容积分器
CN210142336U (zh) * 2019-08-15 2020-03-13 上海思立微电子科技有限公司 电容式指纹识别传感器和电子设备

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CN101526988B (zh) * 2008-03-06 2011-05-04 奇景光电股份有限公司 电容式指纹感应器及其面板
CN102523394B (zh) * 2011-11-23 2014-04-16 华东师范大学 一种光电转换前端检测式增益自动可调读出电路
CN106557724B (zh) 2015-09-25 2019-07-09 上海思立微电子科技有限公司 指纹传感电路及控制方法
KR102032890B1 (ko) * 2016-09-27 2019-10-16 선전 구딕스 테크놀로지 컴퍼니, 리미티드 정전용량 감지 회로
CN207133803U (zh) * 2017-04-28 2018-03-23 北京集创北方科技股份有限公司 感应装置

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003006925A1 (fr) * 2001-07-12 2003-01-23 Sony Corporation Capteur de capacitance electrostatique et dispositif de recueil d'empreinte comprenant ce capteur
US20090206851A1 (en) * 2008-02-20 2009-08-20 Himax Technologies Limited Capacitive Fingerprint Sensor and the Panel Thereof
CN107004121A (zh) * 2014-11-10 2017-08-01 森比斯股份有限公司 电容性感测的电荷转移电路和具有其的检测指纹的设备
CN105426865A (zh) * 2015-12-07 2016-03-23 湖南融创微电子有限公司 指纹检测电路、指纹传感器以及指纹检测方法
CN106156763A (zh) * 2016-08-17 2016-11-23 成都市和平科技有限责任公司 一种指纹识别模块及指纹识别方法
CN106462309A (zh) * 2016-09-27 2017-02-22 深圳市汇顶科技股份有限公司 电容感测电路
CN107980142A (zh) * 2017-11-01 2018-05-01 深圳市汇顶科技股份有限公司 一种指纹识别电路、指纹传感器及移动终端
CN209001929U (zh) * 2018-10-30 2019-06-18 上海工程技术大学 一种全差分开关电容积分器
CN210142336U (zh) * 2019-08-15 2020-03-13 上海思立微电子科技有限公司 电容式指纹识别传感器和电子设备

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US11568671B2 (en) 2023-01-31
US20220114827A1 (en) 2022-04-14

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