DE602004000686D1 - Kapazitanzdetektorschaltung und -verfahren, Anwendung in einem Fingerabdrucksensor - Google Patents

Kapazitanzdetektorschaltung und -verfahren, Anwendung in einem Fingerabdrucksensor

Info

Publication number
DE602004000686D1
DE602004000686D1 DE602004000686T DE602004000686T DE602004000686D1 DE 602004000686 D1 DE602004000686 D1 DE 602004000686D1 DE 602004000686 T DE602004000686 T DE 602004000686T DE 602004000686 T DE602004000686 T DE 602004000686T DE 602004000686 D1 DE602004000686 D1 DE 602004000686D1
Authority
DE
Germany
Prior art keywords
fingerprint sensor
detector circuit
capacitance detector
capacitance
fingerprint
Prior art date
Legal status (The legal status 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 status listed.)
Expired - Fee Related
Application number
DE602004000686T
Other languages
English (en)
Other versions
DE602004000686T2 (de
Inventor
Yuichi Umeda
Junichi Saito
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Alps Alpine Co Ltd
Original Assignee
Alps Electric Co Ltd
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 Alps Electric Co Ltd filed Critical Alps Electric Co Ltd
Publication of DE602004000686D1 publication Critical patent/DE602004000686D1/de
Application granted granted Critical
Publication of DE602004000686T2 publication Critical patent/DE602004000686T2/de
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • 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
    • 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
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Human Computer Interaction (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
  • Image Input (AREA)
  • Measurement Of The Respiration, Hearing Ability, Form, And Blood Characteristics Of Living Organisms (AREA)
  • Image Processing (AREA)
DE602004000686T 2003-11-25 2004-11-24 Kapazitanzdetektorschaltung und -verfahren, Anwendung in einem Fingerabdrucksensor Expired - Fee Related DE602004000686T2 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2003394002A JP4364609B2 (ja) 2003-11-25 2003-11-25 容量検出回路及びそれを用いた指紋センサ
JP2003394002 2003-11-25

Publications (2)

Publication Number Publication Date
DE602004000686D1 true DE602004000686D1 (de) 2006-05-24
DE602004000686T2 DE602004000686T2 (de) 2007-05-10

Family

ID=34463774

Family Applications (1)

Application Number Title Priority Date Filing Date
DE602004000686T Expired - Fee Related DE602004000686T2 (de) 2003-11-25 2004-11-24 Kapazitanzdetektorschaltung und -verfahren, Anwendung in einem Fingerabdrucksensor

Country Status (4)

Country Link
US (1) US7084645B1 (de)
EP (1) EP1536368B1 (de)
JP (1) JP4364609B2 (de)
DE (1) DE602004000686T2 (de)

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Also Published As

Publication number Publication date
EP1536368B1 (de) 2006-04-19
US7084645B1 (en) 2006-08-01
JP4364609B2 (ja) 2009-11-18
DE602004000686T2 (de) 2007-05-10
EP1536368A1 (de) 2005-06-01
JP2005152223A (ja) 2005-06-16
US20060158202A1 (en) 2006-07-20

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