WO2001082237A3 - Method and apparatus for detecting the presence of a finger on a fingerprint minutiae-sensing device - Google Patents

Method and apparatus for detecting the presence of a finger on a fingerprint minutiae-sensing device Download PDF

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Publication number
WO2001082237A3
WO2001082237A3 PCT/US2001/012926 US0112926W WO0182237A3 WO 2001082237 A3 WO2001082237 A3 WO 2001082237A3 US 0112926 W US0112926 W US 0112926W WO 0182237 A3 WO0182237 A3 WO 0182237A3
Authority
WO
WIPO (PCT)
Prior art keywords
finger
strips
sensor
detecting
charge
Prior art date
Application number
PCT/US2001/012926
Other languages
French (fr)
Other versions
WO2001082237A2 (en
Inventor
Hsueh-Li Yeh
Rung-Pan Lin
Kou-Hung Loh
Original Assignee
Veridicom Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Veridicom Inc filed Critical Veridicom Inc
Priority to AU2001257142A priority Critical patent/AU2001257142A1/en
Publication of WO2001082237A2 publication Critical patent/WO2001082237A2/en
Publication of WO2001082237A3 publication Critical patent/WO2001082237A3/en

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Classifications

    • 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

Abstract

A method and apparatus for detecting the presence of a finger on a biometric minutiae sensor is disclosed. According to one embodiment, one or more capacitive sensing strips are disposed on a biometric minutiae sensor. A low frequency clock periodically charges and then discharges the one or more capacitive sensing strips. After a predetermined period, a charge remaining on the capacitive strips is sampled and then compared to a threshold charge. If the sampled charge exceeds the threshold charge then a switch enables a higher frequency clock so that the biometric minutiae sensor is enabled. A finger sensing electronics is also disclosed, which, in one embodiment, includes the one or more capacitive sensing strips and a frequency switch. In still another embodiment, the finger sensing electronics further includes a comparator configured to enable or disable the frequency switch.
PCT/US2001/012926 2000-04-27 2001-04-20 Method and apparatus for detecting the presence of a finger on a fingerprint minutiae-sensing device WO2001082237A2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2001257142A AU2001257142A1 (en) 2000-04-27 2001-04-20 Method and apparatus for detecting the presence of a finger on a fingerprint minutiae-sensing device

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US56117400A 2000-04-27 2000-04-27
US09/561,174 2000-04-27

Publications (2)

Publication Number Publication Date
WO2001082237A2 WO2001082237A2 (en) 2001-11-01
WO2001082237A3 true WO2001082237A3 (en) 2002-03-21

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2001/012926 WO2001082237A2 (en) 2000-04-27 2001-04-20 Method and apparatus for detecting the presence of a finger on a fingerprint minutiae-sensing device

Country Status (2)

Country Link
AU (1) AU2001257142A1 (en)
WO (1) WO2001082237A2 (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2832240A1 (en) * 2001-11-13 2003-05-16 St Microelectronics Sa Contact sensor for finger of stylus for use with a pocket computer, etc., whereby sensor has a low resolution low power operation mode for command input and a high resolution high power mode for fingerprint authentication
KR20160130747A (en) 2013-12-30 2016-11-14 비와이디 컴퍼니 리미티드 Sensor for detecting fingerprint and fingerprint identification appratus and controlling method of sensor for detecting fingerprint
CN104751106B (en) * 2013-12-30 2019-09-13 比亚迪股份有限公司 The control method of fingerprint sensor and fingerprint sensor
CN104794433A (en) * 2015-03-27 2015-07-22 深圳市汇顶科技股份有限公司 Fingerprint recognition system and fingerprint recognition method
US9589171B1 (en) * 2015-10-02 2017-03-07 Fingerprint Cards Ab Method and device for detecting if a finger is present and sensing a fingerprint pattern
US9811708B2 (en) * 2015-10-02 2017-11-07 Fingerprint Cards Ab Method and fingerprint sensing device with finger lost detection
CN107918751A (en) * 2016-10-08 2018-04-17 深圳指瑞威科技有限公司 Fingerprint detection system

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5790946A (en) * 1993-07-15 1998-08-04 Rotzoll; Robert R. Wake up device for a communications system
WO1998052145A1 (en) * 1997-05-16 1998-11-19 Authentec, Inc. Fingerprint sensor including an anisotropic dielectric coating and associated methods
WO1998052135A2 (en) * 1997-05-13 1998-11-19 Veridicom, Inc. Capacitive fingerprint sensor with adjustable gain
WO1999028701A1 (en) * 1997-12-04 1999-06-10 Koninklijke Philips Electronics N.V. Electronic apparatus comprising fingerprint sensing devices
GB2345140A (en) * 1998-12-10 2000-06-28 Omron Tateisi Electronics Co Touch sensor for use in a fingerprint identification device

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2244164A (en) 1990-05-18 1991-11-20 Philips Electronic Associated Fingerprint sensing
US6016355A (en) 1995-12-15 2000-01-18 Veridicom, Inc. Capacitive fingerprint acquisition sensor

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5790946A (en) * 1993-07-15 1998-08-04 Rotzoll; Robert R. Wake up device for a communications system
WO1998052135A2 (en) * 1997-05-13 1998-11-19 Veridicom, Inc. Capacitive fingerprint sensor with adjustable gain
WO1998052145A1 (en) * 1997-05-16 1998-11-19 Authentec, Inc. Fingerprint sensor including an anisotropic dielectric coating and associated methods
WO1999028701A1 (en) * 1997-12-04 1999-06-10 Koninklijke Philips Electronics N.V. Electronic apparatus comprising fingerprint sensing devices
GB2345140A (en) * 1998-12-10 2000-06-28 Omron Tateisi Electronics Co Touch sensor for use in a fingerprint identification device

Also Published As

Publication number Publication date
AU2001257142A1 (en) 2001-11-07
WO2001082237A2 (en) 2001-11-01

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