GB2560582A - Fingerprint and vein imaging apparatus - Google Patents
Fingerprint and vein imaging apparatus Download PDFInfo
- Publication number
- GB2560582A GB2560582A GB1704307.6A GB201704307A GB2560582A GB 2560582 A GB2560582 A GB 2560582A GB 201704307 A GB201704307 A GB 201704307A GB 2560582 A GB2560582 A GB 2560582A
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- United Kingdom
- Prior art keywords
- light
- emitting
- layer
- fingerprint
- compound
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- 238000003384 imaging method Methods 0.000 title claims abstract description 45
- 210000003462 vein Anatomy 0.000 title claims abstract description 45
- 150000001875 compounds Chemical class 0.000 claims abstract description 83
- 238000002347 injection Methods 0.000 claims abstract description 23
- 239000007924 injection Substances 0.000 claims abstract description 23
- 239000010410 layer Substances 0.000 claims description 122
- 229910052751 metal Inorganic materials 0.000 claims description 20
- 239000002184 metal Substances 0.000 claims description 20
- -1 heteroaromatic hydrocarbons Chemical class 0.000 claims description 15
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- 239000000178 monomer Substances 0.000 claims description 8
- 239000003446 ligand Substances 0.000 claims description 6
- 150000002739 metals Chemical class 0.000 claims description 6
- 229920000620 organic polymer Polymers 0.000 claims description 6
- 229910052747 lanthanoid Inorganic materials 0.000 claims description 3
- 239000002356 single layer Substances 0.000 claims description 3
- 150000002894 organic compounds Chemical class 0.000 claims description 2
- 125000002524 organometallic group Chemical group 0.000 claims description 2
- NIHNNTQXNPWCJQ-UHFFFAOYSA-N fluorene Chemical compound C1=CC=C2CC3=CC=CC=C3C2=C1 NIHNNTQXNPWCJQ-UHFFFAOYSA-N 0.000 claims 2
- 150000004945 aromatic hydrocarbons Chemical class 0.000 claims 1
- 125000005266 diarylamine group Chemical group 0.000 claims 1
- 229930195733 hydrocarbon Natural products 0.000 claims 1
- 125000005259 triarylamine group Chemical group 0.000 claims 1
- 230000010354 integration Effects 0.000 abstract description 5
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- 239000000470 constituent Substances 0.000 description 4
- 239000010931 gold Substances 0.000 description 4
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- 101000583150 Homo sapiens Membrane-associated phosphatidylinositol transfer protein 3 Proteins 0.000 description 2
- 102100030351 Membrane-associated phosphatidylinositol transfer protein 3 Human genes 0.000 description 2
- DZSYJVXGONVNKA-UHFFFAOYSA-L NIR-1 dye Chemical compound [K+].[K+].C1=CC2=C(S([O-])(=O)=O)C=C(S([O-])(=O)=O)C=C2C(C2(C)C)=C1[N+](CC)=C2C=CC=CC=CC=C1C(C)(C)C2=CC(C(O)=O)=CC=C2N1CCCCS([O-])(=O)=O DZSYJVXGONVNKA-UHFFFAOYSA-L 0.000 description 2
- 229920001609 Poly(3,4-ethylenedioxythiophene) Polymers 0.000 description 2
- KJTLSVCANCCWHF-UHFFFAOYSA-N Ruthenium Chemical compound [Ru] KJTLSVCANCCWHF-UHFFFAOYSA-N 0.000 description 2
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 2
- CUJRVFIICFDLGR-UHFFFAOYSA-N acetylacetonate Chemical compound CC(=O)[CH-]C(C)=O CUJRVFIICFDLGR-UHFFFAOYSA-N 0.000 description 2
- 229910001515 alkali metal fluoride Inorganic materials 0.000 description 2
- 125000003118 aryl group Chemical group 0.000 description 2
- IOJUPLGTWVMSFF-UHFFFAOYSA-N benzothiazole Chemical compound C1=CC=C2SC=NC2=C1 IOJUPLGTWVMSFF-UHFFFAOYSA-N 0.000 description 2
- 239000008280 blood Substances 0.000 description 2
- 210000004369 blood Anatomy 0.000 description 2
- 238000000151 deposition Methods 0.000 description 2
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 2
- 125000001072 heteroaryl group Chemical group 0.000 description 2
- 229910052762 osmium Inorganic materials 0.000 description 2
- SYQBFIAQOQZEGI-UHFFFAOYSA-N osmium atom Chemical compound [Os] SYQBFIAQOQZEGI-UHFFFAOYSA-N 0.000 description 2
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- 238000000103 photoluminescence spectrum Methods 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
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- 150000004032 porphyrins Chemical class 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- UMJSCPRVCHMLSP-UHFFFAOYSA-N pyridine Natural products COC1=CC=CN=C1 UMJSCPRVCHMLSP-UHFFFAOYSA-N 0.000 description 2
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- WUAPFZMCVAUBPE-UHFFFAOYSA-N rhenium atom Chemical compound [Re] WUAPFZMCVAUBPE-UHFFFAOYSA-N 0.000 description 2
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- UWRZIZXBOLBCON-VOTSOKGWSA-N (e)-2-phenylethenamine Chemical class N\C=C\C1=CC=CC=C1 UWRZIZXBOLBCON-VOTSOKGWSA-N 0.000 description 1
- BCMCBBGGLRIHSE-UHFFFAOYSA-N 1,3-benzoxazole Chemical compound C1=CC=C2OC=NC2=C1 BCMCBBGGLRIHSE-UHFFFAOYSA-N 0.000 description 1
- VERMWGQSKPXSPZ-BUHFOSPRSA-N 1-[(e)-2-phenylethenyl]anthracene Chemical class C=1C=CC2=CC3=CC=CC=C3C=C2C=1\C=C\C1=CC=CC=C1 VERMWGQSKPXSPZ-BUHFOSPRSA-N 0.000 description 1
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- 229910052684 Cerium Inorganic materials 0.000 description 1
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- 229910052691 Erbium Inorganic materials 0.000 description 1
- 229910052693 Europium Inorganic materials 0.000 description 1
- CPELXLSAUQHCOX-UHFFFAOYSA-N Hydrogen bromide Chemical group Br CPELXLSAUQHCOX-UHFFFAOYSA-N 0.000 description 1
- 229910000799 K alloy Inorganic materials 0.000 description 1
- 229910000861 Mg alloy Inorganic materials 0.000 description 1
- PAYRUJLWNCNPSJ-UHFFFAOYSA-N N-phenyl amine Natural products NC1=CC=CC=C1 PAYRUJLWNCNPSJ-UHFFFAOYSA-N 0.000 description 1
- 229910000528 Na alloy Inorganic materials 0.000 description 1
- 229910052779 Neodymium Inorganic materials 0.000 description 1
- 229920000144 PEDOT:PSS Polymers 0.000 description 1
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- 229910052771 Terbium Inorganic materials 0.000 description 1
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- 125000003277 amino group Chemical group 0.000 description 1
- 150000004982 aromatic amines Chemical class 0.000 description 1
- 238000003491 array Methods 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
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- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- WUKWITHWXAAZEY-UHFFFAOYSA-L calcium difluoride Chemical compound [F-].[F-].[Ca+2] WUKWITHWXAAZEY-UHFFFAOYSA-L 0.000 description 1
- 229910001634 calcium fluoride Inorganic materials 0.000 description 1
- 150000001716 carbazoles Chemical class 0.000 description 1
- BVKZGUZCCUSVTD-UHFFFAOYSA-N carbonic acid Chemical class OC(O)=O BVKZGUZCCUSVTD-UHFFFAOYSA-N 0.000 description 1
- 150000001735 carboxylic acids Chemical class 0.000 description 1
- ZMIGMASIKSOYAM-UHFFFAOYSA-N cerium Chemical compound [Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce] ZMIGMASIKSOYAM-UHFFFAOYSA-N 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
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- 238000007334 copolymerization reaction Methods 0.000 description 1
- GBRBMTNGQBKBQE-UHFFFAOYSA-L copper;diiodide Chemical compound I[Cu]I GBRBMTNGQBKBQE-UHFFFAOYSA-L 0.000 description 1
- 238000004132 cross linking Methods 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- KBQHZAAAGSGFKK-UHFFFAOYSA-N dysprosium atom Chemical compound [Dy] KBQHZAAAGSGFKK-UHFFFAOYSA-N 0.000 description 1
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- UYAHIZSMUZPPFV-UHFFFAOYSA-N erbium Chemical compound [Er] UYAHIZSMUZPPFV-UHFFFAOYSA-N 0.000 description 1
- OGPBJKLSAFTDLK-UHFFFAOYSA-N europium atom Chemical compound [Eu] OGPBJKLSAFTDLK-UHFFFAOYSA-N 0.000 description 1
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- 150000002460 imidazoles Chemical class 0.000 description 1
- 229910052738 indium Inorganic materials 0.000 description 1
- 229910003437 indium oxide Inorganic materials 0.000 description 1
- PJXISJQVUVHSOJ-UHFFFAOYSA-N indium(iii) oxide Chemical compound [O-2].[O-2].[O-2].[In+3].[In+3] PJXISJQVUVHSOJ-UHFFFAOYSA-N 0.000 description 1
- AMGQUBHHOARCQH-UHFFFAOYSA-N indium;oxotin Chemical compound [In].[Sn]=O AMGQUBHHOARCQH-UHFFFAOYSA-N 0.000 description 1
- 150000002484 inorganic compounds Chemical class 0.000 description 1
- 229910010272 inorganic material Inorganic materials 0.000 description 1
- 229940079865 intestinal antiinfectives imidazole derivative Drugs 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 238000004768 lowest unoccupied molecular orbital Methods 0.000 description 1
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- 150000005309 metal halides Chemical class 0.000 description 1
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- KKFHAJHLJHVUDM-UHFFFAOYSA-N n-vinylcarbazole Chemical class C1=CC=C2N(C=C)C3=CC=CC=C3C2=C1 KKFHAJHLJHVUDM-UHFFFAOYSA-N 0.000 description 1
- QEFYFXOXNSNQGX-UHFFFAOYSA-N neodymium atom Chemical compound [Nd] QEFYFXOXNSNQGX-UHFFFAOYSA-N 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 150000004866 oxadiazoles Chemical class 0.000 description 1
- 150000007978 oxazole derivatives Chemical class 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 150000004986 phenylenediamines Chemical class 0.000 description 1
- IEQIEDJGQAUEQZ-UHFFFAOYSA-N phthalocyanine Chemical compound N1C(N=C2C3=CC=CC=C3C(N=C3C4=CC=CC=C4C(=N4)N3)=N2)=C(C=CC=C2)C2=C1N=C1C2=CC=CC=C2C4=N1 IEQIEDJGQAUEQZ-UHFFFAOYSA-N 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003227 poly(N-vinyl carbazole) Chemical class 0.000 description 1
- 229920000548 poly(silane) polymer Polymers 0.000 description 1
- 239000004584 polyacrylic acid Substances 0.000 description 1
- 229910052700 potassium Inorganic materials 0.000 description 1
- 238000007639 printing Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- JEXVQSWXXUJEMA-UHFFFAOYSA-N pyrazol-3-one Chemical class O=C1C=CN=N1 JEXVQSWXXUJEMA-UHFFFAOYSA-N 0.000 description 1
- 150000003219 pyrazolines Chemical class 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 229910052761 rare earth metal Inorganic materials 0.000 description 1
- 150000002910 rare earth metals Chemical class 0.000 description 1
- KZUNJOHGWZRPMI-UHFFFAOYSA-N samarium atom Chemical compound [Sm] KZUNJOHGWZRPMI-UHFFFAOYSA-N 0.000 description 1
- 238000007650 screen-printing Methods 0.000 description 1
- 150000004756 silanes Chemical class 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 150000003384 small molecules Chemical class 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 238000010129 solution processing Methods 0.000 description 1
- PJANXHGTPQOBST-UHFFFAOYSA-N stilbene Chemical class C=1C=CC=CC=1C=CC1=CC=CC=C1 PJANXHGTPQOBST-UHFFFAOYSA-N 0.000 description 1
- 150000003460 sulfonic acids Chemical class 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 229940042055 systemic antimycotics triazole derivative Drugs 0.000 description 1
- GZCRRIHWUXGPOV-UHFFFAOYSA-N terbium atom Chemical compound [Tb] GZCRRIHWUXGPOV-UHFFFAOYSA-N 0.000 description 1
- 238000002207 thermal evaporation Methods 0.000 description 1
- 150000003577 thiophenes Chemical class 0.000 description 1
- XOLBLPGZBRYERU-UHFFFAOYSA-N tin dioxide Chemical compound O=[Sn]=O XOLBLPGZBRYERU-UHFFFAOYSA-N 0.000 description 1
- 229910001887 tin oxide Inorganic materials 0.000 description 1
- 238000001771 vacuum deposition Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 239000011787 zinc oxide 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
-
- 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
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
- G01N21/31—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
- G01N21/35—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- G06V10/00—Arrangements for image or video recognition or understanding
- G06V10/10—Image acquisition
- G06V10/12—Details of acquisition arrangements; Constructional details thereof
- G06V10/14—Optical characteristics of the device performing the acquisition or on the illumination arrangements
- G06V10/143—Sensing or illuminating at different wavelengths
-
- 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
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K39/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic radiation-sensitive element covered by group H10K30/00
- H10K39/30—Devices controlled by radiation
- H10K39/32—Organic image sensors
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K50/00—Organic light-emitting devices
- H10K50/10—OLEDs or polymer light-emitting diodes [PLED]
- H10K50/11—OLEDs or polymer light-emitting diodes [PLED] characterised by the electroluminescent [EL] layers
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K50/00—Organic light-emitting devices
- H10K50/10—OLEDs or polymer light-emitting diodes [PLED]
- H10K50/11—OLEDs or polymer light-emitting diodes [PLED] characterised by the electroluminescent [EL] layers
- H10K50/125—OLEDs or polymer light-emitting diodes [PLED] characterised by the electroluminescent [EL] layers specially adapted for multicolour light emission, e.g. for emitting white light
- H10K50/13—OLEDs or polymer light-emitting diodes [PLED] characterised by the electroluminescent [EL] layers specially adapted for multicolour light emission, e.g. for emitting white light comprising stacked EL layers within one EL unit
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K2101/00—Properties of the organic materials covered by group H10K85/00
- H10K2101/10—Triplet emission
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K2101/00—Properties of the organic materials covered by group H10K85/00
- H10K2101/80—Composition varying spatially, e.g. having a spatial gradient
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K85/00—Organic materials used in the body or electrodes of devices covered by this subclass
- H10K85/10—Organic polymers or oligomers
- H10K85/151—Copolymers
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K85/00—Organic materials used in the body or electrodes of devices covered by this subclass
- H10K85/30—Coordination compounds
- H10K85/341—Transition metal complexes, e.g. Ru(II)polypyridine complexes
- H10K85/342—Transition metal complexes, e.g. Ru(II)polypyridine complexes comprising iridium
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Multimedia (AREA)
- Theoretical Computer Science (AREA)
- Human Computer Interaction (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Optics & Photonics (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Health & Medical Sciences (AREA)
- Electroluminescent Light Sources (AREA)
Abstract
A fingerprint and vein imaging apparatus comprises light detector means, imaging means, and a multi-wavelength light source comprising an organic light-emitting element 14 having a first light-emitting compound emitting in a near-infrared (NIR) wavelength range, and a second light-emitting compound having an emission maximum in the wavelength range of from 490 to 570 nanometers. Wherein the first and second light-emitting compounds are comprised in a single light-emitting layer 14 or in two adjacent light-emitting sub-layers. The layered light-emitting structure could also include two electrodes 11,16 as well as a hole injection layer 12 and electron injection layer 15. The disclosed apparatus enables integration of fingerprint and vein imaging devices without negatively affecting their performance.
Description
(71) Applicant(s):
Sumitomo Chemical Company Limited Floor 18, Sumitomo Twin Buildings,
27-1 Shinkawa 2-chome, Chuo-Ku, Tokyo 104-8260, Japan (72) Inventor(s):
Nir Yaacobi-Gross Simon King Martin Humphries Miguel Carrasco (74) Agent and/or Address for Service:
Cambridge Display Technology Limited
Unit 12 Cardinal Park, Cardinal Way, Godmanchester,
Cambridgeshire, PE29 2XG, United Kingdom (51) INT CL:
G06K 9/00 (2006.01) G01N 21/35 (2014.01) G06K9/20 (2006.01) (56) Documents Cited:
US 9159932 B2 US 20120194662 A1
US 20070285541 A1 (58) Field of Search:
INT CLA61B, G01N, G06K
Other: WPI, EPODOC, INSPECT, Patents Fulltext, INTERNET (54) Title of the Invention: Fingerprint and vein imaging apparatus
Abstract Title: Fingerprint and vein imaging using infrared and light of wavelength 490-570 nm (57) A fingerprint and vein imaging apparatus comprises light detector means, imaging means, and a multi-wavelength light source comprising an organic light-emitting element 14 having a first light-emitting compound emitting in a near-infrared (NIR) wavelength range, and a second light-emitting compound having an emission maximum in the wavelength range of from 490 to 570 nanometers. Wherein the first and second light-emitting compounds are comprised in a single light-emitting layer 14 or in two adjacent light-emitting sub-layers. The layered light-emitting structure could also include two electrodes 11,16 as well as a hole injection layer 12 and electron injection layer 15. The disclosed apparatus enables integration of fingerprint and vein imaging devices without negatively affecting their performance.
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FINGERPRINT AND VEIN IMAGIING APPARATUS
FIELD OF INVENTION [0001] This invention relates to fingerprint and vein imaging systems and apparatus having multi-wavelength light sources comprising an organic light-emitting element emitting light in two wavelength regions, which enable simplified simultaneous integration in fingerprint and vein imaging applications that usually require multiple separate light sources or elaborate multilayer configurations. In addition, the invention relates to the use of the aforementioned organic light-emitting elements in fingerprint and vein imaging.
BACKGROUND OF THE INVENTION [0002] Fingerprint sensors represent important security biometric tools for personal identification or verification. Increasing the amount of extracted details enables increased security. Combining fingerprint with finger vein imaging is beneficial as the veins pattern add unique details to the detection system while also providing a “proof of life” which helps to avoid forgery.
[0003] JP 2008-102728 A, for example, discloses an identification and authentication technique using an apparatus comprising a fingertip fingerprint sensor and a digital vein sensor. However, as such devices require two separate sensors, the power consumption is undesirably high and their manufacture is difficult and expensive. In order to address these problems and to enable improved miniaturization of such devices, US 8,811,682 B2 discloses an image capturing apparatus including a substrate in which multiple pixel circuits (i.e. multiple light sources) are formed and wherein the finger print capturing region and the vein capturing region operate as a single capturing region, thereby providing a simplified configuration.
[0004] Most of the optical fingerprint sensors are operating with a visible (usually green) light source in a reflection configuration. Visible light is reflected from the finger surface to a photodetection array. In order to acquire an image of the vein pattern the light needs to penetrate into the tissues to a depth of few millimetres before it reflects back to the detector. Figure 1 illustrates the absorption coefficients of the main constituents of the human soft tissues. As is shown in Fig. 1, the penetration of green light into the human body, for example, is relatively poor, while near infrared (NIR) light will penetrate deeper and therefore is the main light source commonly used for vein imaging.
[0005] In general, it would be desirable to combine multiple light-emitting compounds which emit light at different wavelengths in a single light source in order to enable a further downsizing of the sensor device and to further simplify the method of its manufacture. However, effectively implementing such emitters in a single light source is difficult, as in practice one emitter tends to quench the light output from another emitter. Thus, either the use of filters and careful arrangements thereof (see US 8,811,682 B2, for example) or implementation of intermediate layers (see e.g. US 9,159,932 B2) are typically required, both of which substantially increase the manufacturing costs.
[0006] In view of the above, it remains desirable to provide a multi-wavelength light source which may be manufactured easily and inexpensively and enables simple effective integration into fingerprint and vein imaging devices without negatively affecting their degree of security.
SUMMARY OF THE INVENTION [0007] According to the present invention there is provided a fingerprint and vein imaging apparatus as specified in the claims. The advantages of the present invention will be further explained in detail in the section below and further advantages will become apparent to the skilled artisan upon consideration of the invention disclosure.
[0008] In general, the present invention relates to a fingerprint and vein imaging apparatus comprising light detector means (such as for example an organic photodetector), imaging means (such as for example one or more lenses or microlens arrays), and a multi-wavelength light source comprising an organic light-emitting comprising an organic light-emitting element having at least a first light-emitting compound emitting in a near-infrared wavelength range and a second light-emitting compound having an emission maximum in the wavelength range of from 490 to 570 nm, wherein the first and second light-emitting compounds are comprised in a single light-emitting layer or in two adjacent light-emitting sub-layers. By using different light-emitting compounds in a single organic light-emitting element, which may be processed at relatively low costs by using low temperature vacuum deposition or solution processing techniques, fingerprint and vein imaging devices that enable effective miniaturization may be manufactured in a simple and inexpensive manner.
[0009] Accordingly, in another aspect, the present invention relates to the use of an organic light-emitting element comprising at least two light-emitting compounds emitting light at different wavelengths in fingerprint and vein imaging.
[0010] Preferred embodiments of the multi-wavelength light source, the fingerprint and vein imaging device and the use according to the present invention as well as other aspects of the present invention are described in the following description and the claims.
BRIEF DESCRIPTION OF THE DRAWINGS [0011] FIG. 1 shows the absorption coefficients of the main constituents of human soft tissue.
[0012] FIG. 2 shows an exemplary configuration of a multi-wavelength light source for use in a fingerprint and vein imaging apparatus according to the present invention.
[0013] FIG. 3 shows an exemplary configuration of a multi-wavelength light source for use in a fingerprint and vein imaging apparatus comprising a single light-emitting layer according to one embodiment of the present invention.
[0014] FIG. 4 shows an exemplary configuration of a multi-wavelength light source for use in a fingerprint and vein imaging apparatus comprising adjacent light-emitting sub-layers according to one embodiment of the present invention.
DETAILED DESCRIPTION OF THE INVENTION [0015] For a more complete understanding of the present invention, reference is now made to the following description of the illustrative embodiments thereof:
[0016] In a first embodiment, the present invention includes a multi-wavelength light source for fingerprint and vein imaging, comprising an organic light-emitting element having at least a first light-emitting compound emitting in a near-infrared wavelength range and a second light-emitting compound having an emission maximum in the wavelength range of from 490 to 570 nm, wherein the first and second light-emitting compounds are comprised in a single light-emitting layer or in two adjacent light-emitting sub-layers.
[0017] Accordingly, as opposed to being comprised in a multiplicity of pixels or an array of light-emitting devices, the present invention makes use of light-emitting compounds emitting at different wavelengths within a single light-emitting element and either within a single light-emitting layer or within two adjacent light-emitting sub-layers that are in contact with each other. The sub-layers are adapted to be superimposed so as to emit light from the same area of the device simultaneously.
[0018] The term “single light-emitting layer”, as used herein, is meant to exclude the presence of a continuous light-emitting sub-layer which forms a spacer between the first and the second light-emitting compounds, and hence encompasses the cases wherein the light-emitting layer has a uniform composition and wherein the first and second compounds are comprised in the light-emitting layer in a concentration gradient along the thickness direction.
[0019] The organic light-emitting element typically comprises: a first electrode; a lightemitting layer comprising the first light-emitting compound and the second light-emitting compound; a second electrode; an optional hole-injection layer between the first electrode and the light-emitting layer; and an optional electron-injection layer between the lightemitting layer and the second electrode, wherein the light-emitting layer has a single-layer configuration or wherein the light-emitting layer comprises a first light-emitting sub-layer comprising the first light-emitting compound and an adjacent second light-emitting sublayer comprising the second light-emitting compound.
[0020] An exemplary configuration of the multi-wavelength light source is shown in Fig. 2, wherein the organic light-emitting element comprises a first electrode (11) usually functioning as an anode over a substrate layer (10). In order to enhance the charge transport, an optional hole-injection layer (12) may be formed over the first electrode (11). A light-emitting layer (14) comprising the first light-emitting compound emitting in a nearinfrared wavelength range and the second light-emitting compound having an emission maximum in the wavelength range of from 490 to 570 nm is provided over the holeinjection layer (12). On the side of the light-emitting layer opposed to the first electrode, a second electrode (16) typically functioning as a cathode is formed, with an optional electron-injection layer (15) being provided therebetween. It is noted that, in general, further layers conventionally used in organic light-emitting elements may be present, such as electron blocking layers (EBL), hole-transporting layers (HTL), electron-transporting layers (ETL), spacer layers, intermediate layers, hole-blocking layers (HBL) and encapsulation layers, for example. Moreover, as long as the first light-emitting compound and the second light-emitting compound are either comprised in a single layer or in adjacent layers being in contact with each other, the organic light-emitting element may comprise further light-emitting layers (e.g. red light-emitting layers) in addition to the lightemitting layer (14), wherein the additional light emitting layer(s) may be in contact with light-emitting layer (14) or wherein one or more other layers may be interposed.
[0021] The substrate layer material is not particularly limited and includes plastics such as PEN and PET, glass, and other transparent plastic and/or metal films, for example. While not being limited thereto, the substrate layer thickness is typically in a range of 50 nm to 5 mm.
[0022] The first electrode may comprise any material with a work function suitable for injection of holes into the light emitting layer. While not being limited thereto, the first electrode is typically made of a metal, alloy, metal oxide, electrically-conductive compound or mixture thereof, and is further preferably transparent. As examples of suitable material for a first electrode, electrically conductive metal oxides (including tin oxide, zinc oxide, indium oxide and indium tin oxide (ITO), for example), metals (e.g. Au, Ag, Cr and Ni), electrically conductive inorganic compounds (e.g. copper iodide), electrically-conductive organic compounds (e.g. polyaniline, polythiophene and polypyrrole), and mixtures or laminates thereof may be mentioned. The first electrode material is preferably selected from electrically-conductive metal oxides and further preferably ITO. The thickness of the first electode layer may be suitably selected by the skilled artisan depending on the selected material and will be usually in the range of from 5 nm to 5 pm. Preferably the second electrode is deposited on the substrate by thermal evaporation.
[0023] The second electrode may be formed of any materials having a work function which allows injection of electrons into the light-emitting layer. Suitable materials include, but are not limited to metals, alloys, metal halides, metal oxides, electrically-conductive compounds or mixture thereof. Specific examples include alkaline metals (e.g., Li, Na, K), and fluoride thereof, alkaline earth metals (e.g., Mg, Ca) and fluoride thereof, Au, Ag, Pb, Al, Na/K alloys, Li/AI alloys, Mg/Ag alloys, and rare earth metals (e.g. In, Yb). Among these materials, those having a work function of 4 eV or less, such as 3 eV or less, are preferred. In practice, however, it is preferably from 10 nm to 5 pm, more preferably from 50 nm to 2 pm, even more preferably from 60 nm to 1 pm.
[0024] It is understood that both the first and the second electrode may be provided as multi-layer structure comprising a plurality or a mixture of the aforementioned materials. [0025] As the material constituting the optional hole-injection layer, any material having the capability of injecting holes from the first electrode may be used. Specific examples of such a material include, but are not limited to electrically-conductive oligomers and polymer based on arylamine derivatives, amino-substituted chalcone derivatives, aromatic tertiary amine compounds, aromatic dimethylidine compounds, carbazole derivatives, fluorenone derivatives, hydrazone derivatives, imidazole derivatives, oxazole derivatives, oxadiazole derivatives, phenylenediamine derivatives, polyarylalkane derivatives, porphyrin compounds, pyrazoline derivatives, pyrazolone derivatives, styrylanthracene derivatives, stilbene derivatives, silazane derivatives, styrylamine compounds, triazole derivatives, polysilane compounds, poly(N-vinylcarbazole) derivatives, aniline copolymers, thiophene derivatives, and organic silane derivatives. The thickness of the hole-injecting layer is not specifically limited but is preferably from 1 nm to 5 pm and more preferably from 5 nm to 1 pm. Preferred examples of materials that may be used to form the hole injection layer include PEDOT:PSS, PANI (polyaniline), polypyrrole, optionally substituted and/or doped poly(ethylene dioxythiophene) (PEDT), polyacrylic acid or fluorinated sulfonic acid, and optionally substituted polythiophene or poly(thienothiophene). Other suitable materials are disclosed in Organic Light-Emitting Materials and Devices” L. Zigang and M. Hong, Chapter 3.3, pages 303-12. Preferably the hole injection layer is deposited by a solution-based processing method. Any conventional solution-based processing method may be used, including, but not limited to spin coating, dip coating, slot die coating, doctor blade coating and ink-jet printing.
[0026] Any material capable of injecting electrons from the second electrode may be used for the preparation of the electron-injection layer. Specific examples of such electron10 injecting materials include metal complexes (e.g. metal complexes based on heterocyclic tetracarboxylic anhydrides, phthalocyanine, benzoxazole, benzothiazole or derivatives thereof) and alkali metal fluorides. Further preferred electron-injectiing materials are LiF, CaF2 and NaF. The thickness of the electron-injecting layer is not specifically limited but is preferably from 0.2 nm to 500 nm, in case of alkali metal fluorides preferably from 0.3 to
10 nm. The electron-injection layer may be deposited in accordance to conventional methods known to the skilled artisan.
[0027] The first light-emitting compound emits light in a near-infrared wavelength range and preferably has a maximum in photoluminescence spectrum in the wavelength range of from 700 to 2500 nm, usually in the range of from 700 to 1400 nm. In a preferred
0 embodiment, the first light emitting compound is an organometallic complex comprising a d-block metal (e.g. ruthenium, rhodium, palladium, rhenium, osmium, iridium, platinum and gold), further preferably iridium, as a central metal, and ligands selected from diketonates, acetylacetonate (acac), triarylphosphines, pyridine, porphyrin and ligands comprising heteroaromatic bidentate groups. As a preferred example of a first light25 emitting compound, the iridium complex NIR1 according to the following formula (1) may be mentioned:
(1) [0028] In general, the second light-emitting compound has a maximum in the wavelength range of from 490 to 570 nm in a photoluminescence spectrum, which corresponds to a green light emission. Still more preferably the light emitting compound is an orthometalated complex comprising a central metal selected from an element belonging to group 9 or 10, further preferably a phosphorescent iridium complex.
[0029] In a preferred embodiment, the second light emitting compound is a compound having the formula ML1qL2mL3s; wherein M is a metal preferably selected from lanthanide metals (e.g. cerium, samarium, europium, terbium, dysprosium, thulium, erbium and neodymium) and d-block metals (e.g. ruthenium, rhodium, palladium, rhenium, osmium, iridium, platinum and gold), further preferably iridium; each of L1, L2and L3 is a ligand; q is an integer; m and s are each independently 0 or an integer; and the sum of (aq)+(bm)+(cs) is equal to the number of coordination sites available on M, wherein a is the number of ligating sites on L1, b is the number of ligating sites on L2 and c is the number of ligating sites on L3. Suitable ligands for the lanthanide metals include oxygen or nitrogen donor systems such as carboxylic acids, 1,3-diketonates, hydroxy carboxylic acids, Schiff bases including acyl phenols and iminoacyl groups. The d-block metals are particularly suitable for emission from triplet excited states. Ligating groups suitable for use with d-block elements include diketonates, in particular acetylacetonate (acac), triarylphosphines, pyridine, porphyrin or ligands comprising heteroaromatic bidentate
0 groups. Exemplary green light emitters and methods of synthesis are disclosed in US 2014/0077194 A1. A specific example of a second light emitting compound is given by chemical formula (2):
(2)
5 [0030] As an alternative to the presence as light-emitting small-molecules, the first light emitting compound and/or the second light-emitting compound may be chemically bound to a material present in the light emitting layer (e.g., as a repeat unit, pendant group or end-group within a host polymer or an electron-transporting polymer as disclosed in EP 1 245 659 A1, WO 03/18653, WO 03/22908 and WO 02/31896, for example).
[0031] Two specific embodiments of a multi-wavelength light source according to the present invention will be explained below with reference to Figures 3 and 4.
[0032] Figure 3 illustrates an exemplary organic light-emitting element comprising the first light-emitting compound emitting in a near-infrared wavelength range and the second light-emitting compound having an emission maximum in the wavelength range of from 490 to 570 nm in a single light-emitting layer (24). As mentioned above, said single lightemitting layer (24) may have a uniform composition or may comprise the first and second compounds in a concentration gradient along the thickness direction. In this embodiment, it is preferable to provide an intermediate layer (23) between the light-emitting layer (24) and the first electrode (21) or between the light-emitting layer (24) and the hole-injection layer (22), if the latter is present. Advantageously, a configuration according to Fig. 3 may be produced quickly, simply and inexpensively as it requires a small number of stacked layers compared to conventional devices.
[0033] The material used for the preparation of the intermediate layer is preferably a conjugated polymer (also referred to as first conjugated organic polymer below). Examples thereof include interlayer materials as those disclosed in US 2014/0077194 A1. Further preferably, the interlayer material is a conjugated organic polymer comprising as repeat units one or more amino groups, specifically preferably one or more di- or triarylamino groups and derivatives thereof. While not being limited thereto, the thickness of the intermediate layer is preferably 5 to 50 nm and more preferably 10 to 40 nm. Preferably the interlayer is deposited by a solution-based processing method. Any conventional solution-based processing method may be used, including spin coating, dip coating, slot die coating, doctor blade coating and ink-jet printing, for example.
[0034] If the first light-emitting compound and the second light-emitting compound are comprised in a single light-emitting layer (24), it is preferable that the second light-emitting compound is comprised in the light-emitting layer at a content of 10 to 60% by weight, preferably 15 to 50 % by weight, further preferably 20 to 40% by weight, which enables the second light-emitting compound to provide for the hole transport. As the first lightemitting compound likely exhibits the deepest LUMO level, light emission is generated by both electron trapping on the first light-emitting compound, i.e. the NIR emitter, and the energy transfer from the second light-emitting compound, i.e. the green emitter. Thus, in order to optimize the light emission efficiency, the first light-emitting compound is preferably comprised in the light-emitting layer at a content of 0.01 to 5% by weight, preferably 0.02 to 3% by weight, further preferably 0.05 to 2.5% by weight. By varying the content in the given ranges, the proportion of NIR light emission may be controlled depending on the desired purpose.
[0035] The light-emitting layer (24) preferably further comprises a host material at a content of 40 to 90% by weight, preferably at a content of 60 to 80% by weight, the host material being preferably a conjugated polymer (also referred to as second conjugated organic polymer in this disclosure), further preferably a conjugated polymer comprising aromatic repeat groups, specifically preferably a conjugated polymer comprising substituted or unsubstituted benzene groups and/or fluorene groups.
[0036] The light emitting layer is preferably prepared using a solution by means of conventional solution-based processing methods. Representative examples thereof include, but are not limited to include spin coating, flow coating, dip coating, slot die coating, doctor blade coating, screen printing, printing, imprinting, and ink-jet printing. The deposition may be followed by a heating/drying treatment in order to enhance the uniformity of the light-emitting layer.
[0037] Figure 4 illustrates an exemplary organic light-emitting element wherein the first light-emitting compound emitting in a near-infrared wavelength range is comprised in a first light-emitting sub-layer (34a) and the second light-emitting compound (i.e. the green emitter) is comprised in a second light-emitting sub-layer (34b), wherein the sub-layers (34a) and (34b) are adjacent to and in contact with each other. Herein, the second lightemitting sub-layer (34b) corresponds to the light-emitting layer (24) according to the description above, with the exception that the first light-emitting compound is absent.
[0038] In a preferred embodiment, the first light-emitting sub-layer (34a) comprises an interlayer material as used in intermediate layer (23) in combination with first light-emitting compound, the interlayer material being preferably a conjugated organic polymer (also referred to as third conjugated organic polymer in this disclosure). Further preferably, the first light-emitting compound is chemically bound to the interlayer material. This can be achieved by co-polymerising the light-emitting compound with the monomer constituents of the interlayer material. An exemplary monomer that can be synthesized for this purpose is shown in the scheme below:
[0039] Copolymerization may then be performed through the reactive bromide groups of the resulting monomer. However, the above scheme is only illustrative and it will be readily apparent to the skilled artisan that attachment of different monomer species at different positions and by using different leaving groups is also possible. Also, the lightemitting compound may also be attached to an interlayer polymer as a pendant (side) group or as (an) end group(s).
[0040] Advantageously, said configuration enables extensive control of the proportion of NIR and green light emission. Firstly, by varying the content relative to the interlayer material, the proportion of NIR/green emission may be tuned. While the content of the first light-emitting compound may depend on its selection and properties, it is preferably present in the first light-emitting sub-layer in a content range of from 0.01 to 15% by weight, preferably 0.02 to 10% by weight, further preferably 0.05 to 5% by weight. Secondly, the interlayer polymer may be suitably selected depending on its triplet level to enhance the transfer of triplets from a phosphorescent green emitter to the interlayer polymer and from the interlayer polymer to the NIR emitter. Thirdly, the degree of crosslinking of the interlayer polymer may be varied, which controls the amount of green emitter penetrating the interlayer polymer which in turn allows a route to transfer triplets from the green to the NIR emitter.
[0041] Therefore, the present invention provides a multi-wavelength light source which may be inexpensively manufactured and which enables simple integration into a large number of fingerprint and vein imaging devices in view of its flexibility and the improved miniaturization potential.
[0042] In another embodiment, the present invention relates to a fingerprint and vein imaging device comprising a multi-wavelength light source according to the above description. The fingerprint and vein imaging device may comprise driver, control and processing circuits and sensor units as conventionally used in the art, and may be implemented in numerous authentication and verification systems, including, but not limited to, mobile phones, computers, ATMs, and building and vehicle entry/exit management systems. The multi-wavelength light source may be provided between the finger and the light detector means, or the light detector means may be provided between the finger and the multi-wavelength light source. In the former case the multi-wavelength light spurce must be adapted to be light transmissive. In the latter case the light detector means must be adapted to be light transmissive. This is easy to achieve with thin organic LED and photodetector devices having semi-transparent electrodes. The light detector means may for example comprise an array of organic photodiodes.
EXAMPLE [0043] An exemplary device in accordance to the configuration of Fig. 3 is a multiwavelength light source having the following specific configuration:
[0044]
| Layer | Composition |
| second electrode (cathode) | Al (100 nm) |
| electron-injection layer (EIL) | NaF (2 nm) |
| light-emitting layer | Polymer A : Compound (2) : Compound (1) (80 nm) |
| interlayer | Polymer B (20 nm) |
| hole-injection layer | AQ1200 (65 nm) |
| first electrode (anode) | ITO |
| substrate | PEN |
[0045] In this example, the light-emitting layer is formed by using Polymer A as a host polymer, which is a conjugated polymer having the formula [M1-M2-M6 (50/40/10)]. Polymer B is an interlayer polymer comprising substituted triarylamino groups and having the formula [M1-M4-M5 (50/42.5/7.5)]. The monomer weight ratios relative to the total polymer weight are defined by the values in the rounded brackets and the monomers have the following structures:
(M4) (M5)
(M6) [0046] The hole-injection layer is formed by spin-coating a layer of the hole injection material AQ1200 (commercially available from Solvay S.A.) onto the ITO anode.
[0047] The light-emitting layer is prepared by depositing a mixture of Polymer A, Compound (2) (second light-emitting compound; NIR1) and Compound (1) (first lightemitting compound) from a solution in organic solvent. Excellent results are achieved by using weight ratios of Polymer A : Compound (2) : Compound (1) in the range 68-69.9 : 3: 0.1-2, relative to the total weight of the constituents.
[0048] Once given the above disclosure, many other features, modifications, and improvements will become apparent to the skilled artisan.
REFERENCE NUMERALS
10/20/30: substrate layer
11/21/31: first electrode
12/22/32: hole-injecting layer
23: intermediate layer
14/24/34: light-emitting layer
34a: first light-emitting sub-layer
34b: second light-emitting sub-layer
15/25/35: electron-injecting layer
16/26/35: second electrode
Claims (16)
1. A fingerprint and vein imaging apparatus comprising light detector means, imaging means, and a multi-wavelength light source comprising an organic light-emitting element including at least a first light-emitting compound emitting in a near-infrared wavelength range and a second light-emitting compound having an emission maximum in the wavelength range of from 490 to 570 nm, wherein the first and second light-emitting compounds are comprised in a single light-emitting layer or in two superimposed lightemitting sub-layers such that light having two different wavelengths is emitted from the same area towards a finger in use.
2. A fingerprint and vein imaging apparatus according to claim 1, wherein the organic light-emitting element comprises:
a first electrode; a second electrode; and a light-emitting layer comprising the first light-emitting compound and the second light-emitting compound provided between the first and second electrode.
3. A fingerprint and vein imaging apparatus according to claim 2 in which the light emitting layer has a single layer configuration.
4. A fingerprint and vein imaging apparatus according to claim 3, wherein the first light-emitting compound is comprised in the light-emitting layer at a content of 0.01 to 5% by weight, preferably 0.02 to 3% by weight, further preferably 0.05 to 2.5% by weight; and/or the second light-emitting compound is comprised in the light-emitting layer at a content of 5 to 60% by weight, preferably 15 to 50 % by weight, further preferably 25 to 40% by weight.
5. A fingerprint and vein imaging apparatus according to claims 3 or 4, wherein the light-emitting layer further comprises a second conjugated polymer at a content of 40 to 90% by weight, preferably at a content of 60 to 80% by weight.
6. A fingerprint and vein imaging apparatus according to claim 2 in which the light emitting layer comprises a first light-emitting sub-layer comprising the first light-emitting compound and an adjacent superimposed second light-emitting sub-layer comprising the second light-emitting compound.
7. A fingerprint and vein imaging system according to claim 6, wherein first lightemitting sub-layer further comprises a third conjugated polymer.
8. A fingerprint and vein imaging apparatus according to claims 7, wherein the first light-emitting compound comprised in the first light-emitting sub-layer is chemically bound to the third conjugated polymer
9. A fingerprint and vein imaging apparatus according to any preceding claim further comprising a hole-injection layer between the first electrode and the light-emitting layer.
10. A fingerprint and vein imaging apparatus according to any preceding claim further comprising an electron-injection layer between the second electrode and the light-emitting layer.
11. A fingerprint and vein imaging apparatus according to any preceding claim further comprising an intermediate hole transporting layer between the light-emitting layer and the first electrode or, if present, the hole injection layer, wherein the intermediate hole transporting layer comprises a first conjugated organic polymer.
12. A fingerprint and vein imaging apparatus according to any one of claims 5, 7, 8, or 10, wherein the first, second and/or third conjugated polymer comprises one or more, preferably at least two, repeating units selected from fluorene, conjugated aromatic hydrocarbons, dialkylarylamines, diarylalkylamines, diarylamines, triarylamines, heteroaromatic hydrocarbons, and derivatives thereof.
13. A fingerprint and vein imaging apparatus according to any of claims 6 to 8, wherein the first light-emitting sub-layer is formed by copolymerisation of the first light-emitting compound and one or more organic monomers, the one or more organic monomers preferably being a conjugated organic compound.
14. A fingerprint and vein imaging apparatus according to any preceding claim, wherein the first light emitting compound is an organometallic complex comprising a dblock metal as a central metal.
15. A fingerprint and vein imaging apparatus according to any preceding claim, wherein the second light-emitting compound is a compound having the formula
ML1qL2mL3s; wherein M is a metal preferably selected from lanthanide metals and d-block metals; each of L1, L2and L3 is a ligand; q is an integer; m and s are each independently 0 or an integer; and the sum of (aq)+(bm)+(cs) is equal to the number of coordination sites available on M, wherein a is the number of ligating sites on L1, b is the number of ligating sites on L2 and c is the number of ligating sites on L3.
16. Use of an organic light-emitting element, wherein a first light-emitting compound emitting in a near-infrared wavelength range and a second light-emitting compound having an emission maximum in the wavelength range of from 490 to 570 nm are comprised a single light-emitting layer or in two adjacent light-emitting sub-layers, in fingerprint and vein imaging.
Intellectual
Property
Office
Application No: GB1704307.6 Examiner: Alan Phipps
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1704307.6A GB2560582A (en) | 2017-03-17 | 2017-03-17 | Fingerprint and vein imaging apparatus |
| PCT/GB2018/050425 WO2018167456A1 (en) | 2017-03-17 | 2018-02-19 | Fingerprint and vein imaging apparatus |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1704307.6A GB2560582A (en) | 2017-03-17 | 2017-03-17 | Fingerprint and vein imaging apparatus |
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| GB201704307D0 GB201704307D0 (en) | 2017-05-03 |
| GB2560582A true GB2560582A (en) | 2018-09-19 |
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| GB1704307.6A Withdrawn GB2560582A (en) | 2017-03-17 | 2017-03-17 | Fingerprint and vein imaging apparatus |
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| GB (1) | GB2560582A (en) |
| WO (1) | WO2018167456A1 (en) |
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| FR3113430B1 (en) * | 2020-08-17 | 2024-01-05 | Isorg | Image acquisition system |
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|---|---|---|---|---|
| US20070285541A1 (en) * | 2006-06-01 | 2007-12-13 | Nec Electronics Corporation | Solid-state imaging apparatus, imaging method, and imaging system |
| US20120194662A1 (en) * | 2011-01-28 | 2012-08-02 | The Hong Kong Polytechnic University | Method and system for multispectral palmprint verification |
| US9159932B2 (en) * | 2011-08-09 | 2015-10-13 | Seiko Epson Corporation | Light emitting element, light emitting device, and electronic device |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2456787B (en) * | 2008-01-23 | 2010-06-02 | Cambridge Display Tech Ltd | Pulsed driven displays |
| GB2505893A (en) * | 2012-09-13 | 2014-03-19 | Cambridge Display Tech Ltd | Compounds for use in organic optoelectronic devices |
-
2017
- 2017-03-17 GB GB1704307.6A patent/GB2560582A/en not_active Withdrawn
-
2018
- 2018-02-19 WO PCT/GB2018/050425 patent/WO2018167456A1/en active Application Filing
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070285541A1 (en) * | 2006-06-01 | 2007-12-13 | Nec Electronics Corporation | Solid-state imaging apparatus, imaging method, and imaging system |
| US20120194662A1 (en) * | 2011-01-28 | 2012-08-02 | The Hong Kong Polytechnic University | Method and system for multispectral palmprint verification |
| US9159932B2 (en) * | 2011-08-09 | 2015-10-13 | Seiko Epson Corporation | Light emitting element, light emitting device, and electronic device |
Also Published As
| Publication number | Publication date |
|---|---|
| GB201704307D0 (en) | 2017-05-03 |
| WO2018167456A1 (en) | 2018-09-20 |
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