EP1787238A1 - Device for recording a fingerprint - Google Patents
Device for recording a fingerprintInfo
- 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- Withdrawn
Links
- 239000004020 conductor Substances 0.000 claims abstract description 11
- 239000004065 semiconductor Substances 0.000 claims abstract description 9
- 239000011159 matrix material Substances 0.000 claims abstract description 5
- 238000010276 construction Methods 0.000 claims abstract 2
- 238000011156 evaluation Methods 0.000 claims description 11
- 241001295925 Gegenes Species 0.000 claims 1
- 229920000547 conjugated polymer Polymers 0.000 description 4
- 230000004913 activation Effects 0.000 description 3
- 238000005286 illumination Methods 0.000 description 3
- 230000002123 temporal effect Effects 0.000 description 3
- XMWRBQBLMFGWIX-UHFFFAOYSA-N C60 fullerene Chemical compound C12=C3C(C4=C56)=C7C8=C5C5=C9C%10=C6C6=C4C1=C1C4=C6C6=C%10C%10=C9C9=C%11C5=C8C5=C8C7=C3C3=C7C2=C1C1=C2C4=C6C4=C%10C6=C9C9=C%11C5=C5C8=C3C3=C7C1=C1C2=C4C6=C2C9=C5C3=C12 XMWRBQBLMFGWIX-UHFFFAOYSA-N 0.000 description 2
- 206010034972 Photosensitivity reaction Diseases 0.000 description 2
- 230000001419 dependent effect Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000005284 excitation Effects 0.000 description 2
- 229910003472 fullerene Inorganic materials 0.000 description 2
- 238000003384 imaging method Methods 0.000 description 2
- 230000036211 photosensitivity Effects 0.000 description 2
- 239000002904 solvent Substances 0.000 description 2
- 239000002800 charge carrier Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 239000010453 quartz Substances 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
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
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT0150104A AT413897B (en) | 2004-09-08 | 2004-09-08 | DEVICE FOR DETECTING A FINGERPRINT |
PCT/AT2005/000337 WO2006026795A1 (en) | 2004-09-08 | 2005-08-24 | Device for recording a fingerprint |
Publications (1)
Publication Number | Publication Date |
---|---|
EP1787238A1 true EP1787238A1 (en) | 2007-05-23 |
Family
ID=35376795
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP05773903A Withdrawn EP1787238A1 (en) | 2004-09-08 | 2005-08-24 | Device for recording a fingerprint |
Country Status (7)
Country | Link |
---|---|
US (1) | US20070262244A1 (en) |
EP (1) | EP1787238A1 (en) |
JP (1) | JP4392674B2 (en) |
CN (1) | CN100541519C (en) |
AT (1) | AT413897B (en) |
CA (1) | CA2579158C (en) |
WO (1) | WO2006026795A1 (en) |
Families Citing this family (4)
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 (en) * | 2011-01-20 | 2013-12-11 | 成都方程式电子有限公司 | Optical fingerprint acquisition instrument without keystone distortions |
CN107609542B (en) | 2017-10-24 | 2021-01-26 | 京东方科技集团股份有限公司 | Light sensing device, display device and fingerprint identification method |
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)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2746627B1 (en) * | 1996-03-28 | 1998-06-12 | Sagem | FINGERPRINT SENSOR DEVICE |
US6091838A (en) * | 1998-06-08 | 2000-07-18 | E.L. Specialists, Inc. | Irradiated images described by electrical contact |
AU4330100A (en) * | 1999-04-05 | 2000-10-23 | Ethentica, Inc. | Planar optical image sensor and system for generating an electronic image of a relief object for fingerprint reading |
US20040252867A1 (en) * | 2000-01-05 | 2004-12-16 | Je-Hsiung Lan | Biometric sensor |
JP3858263B2 (en) * | 2001-11-09 | 2006-12-13 | 日本電気株式会社 | Fingerprint image input device and electronic device using the same |
TWI243339B (en) * | 2002-03-19 | 2005-11-11 | Casio Computer Co Ltd | Image reading apparatus and drive control method |
JP2004016407A (en) * | 2002-06-14 | 2004-01-22 | Canon Inc | Image detector and cellular phone |
US6852996B2 (en) * | 2002-09-25 | 2005-02-08 | Stmicroelectronics, Inc. | Organic semiconductor sensor device |
JP4314843B2 (en) * | 2003-03-05 | 2009-08-19 | カシオ計算機株式会社 | Image reading apparatus and personal authentication system |
-
2004
- 2004-09-08 AT AT0150104A patent/AT413897B/en active
-
2005
- 2005-08-24 EP EP05773903A patent/EP1787238A1/en not_active Withdrawn
- 2005-08-24 US US11/662,318 patent/US20070262244A1/en not_active Abandoned
- 2005-08-24 WO PCT/AT2005/000337 patent/WO2006026795A1/en active Application Filing
- 2005-08-24 JP JP2007533818A patent/JP4392674B2/en active Active
- 2005-08-24 CN CNB2005800301351A patent/CN100541519C/en active Active
- 2005-08-24 CA CA2579158A patent/CA2579158C/en active Active
Non-Patent Citations (2)
Title |
---|
None * |
See also references of WO2006026795A1 * |
Also Published As
Publication number | Publication date |
---|---|
CA2579158A1 (en) | 2006-03-16 |
JP2008512804A (en) | 2008-04-24 |
CA2579158C (en) | 2014-12-02 |
AT413897B (en) | 2006-07-15 |
JP4392674B2 (en) | 2010-01-06 |
CN101014965A (en) | 2007-08-08 |
WO2006026795A1 (en) | 2006-03-16 |
US20070262244A1 (en) | 2007-11-15 |
ATA15012004A (en) | 2005-10-15 |
CN100541519C (en) | 2009-09-16 |
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Legal Events
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Effective date: 20141001 |
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18D | Application deemed to be withdrawn |
Effective date: 20210204 |