EP1787238A1 - Dispositif pour enregistrer une empreinte digitale - Google Patents

Dispositif pour enregistrer une empreinte digitale

Info

Publication number
EP1787238A1
EP1787238A1 EP05773903A EP05773903A EP1787238A1 EP 1787238 A1 EP1787238 A1 EP 1787238A1 EP 05773903 A EP05773903 A EP 05773903A EP 05773903 A EP05773903 A EP 05773903A EP 1787238 A1 EP1787238 A1 EP 1787238A1
Authority
EP
European Patent Office
Prior art keywords
light
layer
elements
emitting elements
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.)
Withdrawn
Application number
EP05773903A
Other languages
German (de)
English (en)
Inventor
Franz Padinger
Klaus G. SCHRÖTER
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.)
ASMAG Holding GmbH
Original Assignee
Nanoident Technologies AG
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 Nanoident Technologies AG filed Critical Nanoident Technologies AG
Publication of EP1787238A1 publication Critical patent/EP1787238A1/fr
Withdrawn legal-status Critical Current

Links

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
    • G06V40/1318—Sensors therefor using electro-optical elements or layers, e.g. electroluminescent sensing

Definitions

  • the invention relates to a device for detecting a Fingerabdruk- kes with a translucent, a finger rest forming cover layer, on whose side facing away from the finger support an attached to an evaluation circuit sios layer of photosensitive elements in a matrix arrangement and rindemittie ⁇ rende elements are provided.
  • photosensitive elements preferably photodiodes or phototransistors
  • a transparent carrier made of glass or quartz ⁇ arrange and with a light-emitting layer, for example, electroluminescent zenzdioden cover. Since the photosensitive elements are arranged in rows in a matrix and the element rows are separated from one another by translucent spaces, light can be thrown from the light emitting layer through the translucent spaces and the transparent support onto the finger for capturing its fingerprint the serving as a finger rest support is applied.
  • the differently reflected light on the bars and depressions of the skin is detected by the light-sensitive elements whose electrical signals, which are dependent on the intensity of the reflected light, are transmitted element by element into an evaluation circuit for producing a digital image of a fingerprint.
  • a disadvantage of this known device for capturing a fingerprint is, in particular, the use of photosensitive elements based on inorganic semiconductors. ter conditional design effort, what is more, that the illumination of the fingerprint to be detected can only be made by comparatively narrow spaces between the photosensitive elements.
  • the invention is therefore based on the object, a device for detecting a fingerprint of the type described in such a way that with simple constructive means, a digital image of a fingerprint can be obtained.
  • the invention solves this problem by the fact that on the side opposite the finger support side of the cover layer, a photoactive layer based on organic semiconductors between two electrode layers of intersecting interconnects is arranged, of which the interconnects between the photoakti ⁇ ven layer and the cover layer made translucent are, and that the photo ⁇ active layer forms the photosensitive and the light-emitting elements in Kreu ⁇ tion region of the interconnects of the two electrode layers.
  • such photoactive layers in a corresponding structure by applying a Excitation voltage also emit light, so that it does not require a separate lichtemit ⁇ tierenden location. Selected areas of the photoactive layer can be acted upon by the associated conductor tracks of the two electrode layers for emitting light with an electrical voltage. To this light for illumination and detection of the fingerprint using NEN to ⁇ Ki, the electrode layer between the photoactive layer and the cover layer is light-transmissive form.
  • the requirements on the one hand for high photosensitivity and on the other hand for a good luminous efficacy at low excitation energy generally entail different measures with regard to the structure of the photoactive layer.
  • the photoactive layer may have a different structure than the regions of the photosensitive elements. Because of the solubility of organic semiconductors in conventional solvents, this difference in structure brings no difficulties, especially as the solutions can be applied point by point next to one another.
  • FIG. 1 shows a device according to the invention for detecting a fingerprint in a schematic cross section
  • FIG. 2 shows the device according to FIG. 1 in a schematic plan view, partially broken away, and FIG
  • Fig. 3 is a block diagram for the control and evaluation of a erfindungsge ⁇ MAESSEN device for detecting a fingerprint.
  • the illustrated device for detecting a fingerprint 1 indicated by dot-dash lines in FIG. 1 has a photoactive layer 2, against which two electrode layers 3, 4 are made of interconnecting interconnects 5, 6 ,
  • the photoactive layer 2 is constructed on the basis of organic semiconductors whose charge mobility parallel to the layer surface is comparatively small, so that in the crossing region of the conductor tracks 5, 6 give each other substantially separate photoactive elements.
  • the photoactive layer 2 in the local region of the light-emitting elements 8 preferably consists only of a conjugated polymer, while the photoactive layer in the remaining area consists of two molecular organic components, namely a conjugated polymer component as electron donor and a fullerene component as electron acceptor. composed.
  • a conjugated polymer component as electron donor
  • a fullerene component as electron acceptor.
  • the light-emitting elements 8 and the licht ⁇ sensitive elements 9 are also different to control. While the photosensitive elements 9 according to FIG. 3 are connected via the printed conductors 5, 6 to an evaluation circuit 10, the light-emitting elements 8 are controlled via a control device 11 which is connected to the interconnects 5 crossing each other in the region of the light-emitting elements 8, 6 is connected ver ⁇ . Because of the necessary for the illumination of the fingerprint and the detection of the reflected light passage of light through the electrode layer 3, the interconnects 5 of this electrode layer 3 are translucent form.
  • the light-emitting elements 8 are first of all
  • the photosensitive layer 2 is sequentially controlled in a temporal sequence in order to detect light reflected diffusely on the fingerprint 1 of the finger 7 lying on the cover layer 7 via photosensitive elements 9.
  • These photosensitive elements 9 are selected as a function of the local position of the light-emitting elements 8 within the element matrix in order to read out the output signals of the light-sensitive elements 9 dependent on the light intensity of the reflected light into the evaluation circuit 10 via the associated printed conductors 5, 6 ,
  • the fingerprint is thus detected area by area and composed each detected areas for complete image of the fingerprint.
  • the output signals of the photosensitive elements 9 can be read out in temporal dependence on the activation of the light-emitting elements 8 in the evaluation circuit, so that only light-sensitive elements 9 the reflected light is detected.

Landscapes

  • Engineering & Computer Science (AREA)
  • Human Computer Interaction (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Multimedia (AREA)
  • Theoretical Computer Science (AREA)
  • Image Input (AREA)
  • Measurement Of The Respiration, Hearing Ability, Form, And Blood Characteristics Of Living Organisms (AREA)

Abstract

L'invention concerne un dispositif pour enregistrer une empreinte digitale (1), pourvu d'une couche extérieure (7) laissant passer la lumière et formant un appui pour le doigt, la face de la couche extérieure qui est opposée à l'appui étant pourvue d'éléments électroluminescents (8) et d'une couche d'éléments photosensibles (9) agencés en une matrice, laquelle couche est reliée à un circuit d'analyse (10). L'objectif de cette invention est de créer des conditions de construction avantageuses. A cet effet, une couche photoactive (2) à base de semiconducteurs organiques, intercalée entre deux couches d'électrode (3, 4) constituées de pistes conductrices entrecroisées (5, 6), est appliquée sur la face de la couche extérieure (7) qui est opposée à l'appui pour le doigt, les pistes conductrices (5) situées entre la couche photoactive (2) et la couche extérieure (7) étant conçues de façon à laisser passer la lumière, et la couche photoactive (2) forme les éléments photosensibles et électroluminescents (8, 9) dans la zone d'intersection des pistes conductrices (5, 6) des deux couches d'électrode (3, 4).
EP05773903A 2004-09-08 2005-08-24 Dispositif pour enregistrer une empreinte digitale Withdrawn EP1787238A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT0150104A AT413897B (de) 2004-09-08 2004-09-08 Vorrichtung zum erfassen eines fingerabdruckes
PCT/AT2005/000337 WO2006026795A1 (fr) 2004-09-08 2005-08-24 Dispositif pour enregistrer une empreinte digitale

Publications (1)

Publication Number Publication Date
EP1787238A1 true EP1787238A1 (fr) 2007-05-23

Family

ID=35376795

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05773903A Withdrawn EP1787238A1 (fr) 2004-09-08 2005-08-24 Dispositif pour enregistrer une empreinte digitale

Country Status (7)

Country Link
US (1) US20070262244A1 (fr)
EP (1) EP1787238A1 (fr)
JP (1) JP4392674B2 (fr)
CN (1) CN100541519C (fr)
AT (1) AT413897B (fr)
CA (1) CA2579158C (fr)
WO (1) WO2006026795A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8598555B2 (en) * 2009-11-20 2013-12-03 Authentec, Inc. Finger sensing apparatus with selectively operable transmitting/receiving pixels and associated methods
CN102096815B (zh) * 2011-01-20 2013-12-11 成都方程式电子有限公司 无梯形畸变的光学指纹采集仪
CN107609542B (zh) 2017-10-24 2021-01-26 京东方科技集团股份有限公司 光感器件、显示装置及指纹识别方法
US10498947B2 (en) * 2017-10-30 2019-12-03 Taiwan Semiconductor Manufacturing Co., Ltd. Image sensor including light shielding layer and patterned dielectric layer

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2746627B1 (fr) * 1996-03-28 1998-06-12 Sagem Dispositif capteur d'empreintes
US6091838A (en) * 1998-06-08 2000-07-18 E.L. Specialists, Inc. Irradiated images described by electrical contact
WO2000060530A1 (fr) * 1999-04-05 2000-10-12 Ethentica, Inc. Detecteur d'images optiques planes et systeme permettant de generer une image electronique d'un objet en relief pour lecture d'une empreinte digitale
US20040252867A1 (en) * 2000-01-05 2004-12-16 Je-Hsiung Lan Biometric sensor
JP3858263B2 (ja) * 2001-11-09 2006-12-13 日本電気株式会社 指紋画像入力装置及びそれを用いた電子機器
TWI243339B (en) * 2002-03-19 2005-11-11 Casio Computer Co Ltd Image reading apparatus and drive control method
JP2004016407A (ja) * 2002-06-14 2004-01-22 Canon Inc 画像検出装置および携帯機器
US6852996B2 (en) * 2002-09-25 2005-02-08 Stmicroelectronics, Inc. Organic semiconductor sensor device
JP4314843B2 (ja) * 2003-03-05 2009-08-19 カシオ計算機株式会社 画像読取装置及び個人認証システム

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
None *
See also references of WO2006026795A1 *

Also Published As

Publication number Publication date
AT413897B (de) 2006-07-15
CN100541519C (zh) 2009-09-16
ATA15012004A (de) 2005-10-15
JP4392674B2 (ja) 2010-01-06
WO2006026795A1 (fr) 2006-03-16
CA2579158C (fr) 2014-12-02
US20070262244A1 (en) 2007-11-15
CN101014965A (zh) 2007-08-08
CA2579158A1 (fr) 2006-03-16
JP2008512804A (ja) 2008-04-24

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