EP3470236B1 - Support de données pourvu de zones à motif luminescentes - Google Patents

Support de données pourvu de zones à motif luminescentes Download PDF

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Publication number
EP3470236B1
EP3470236B1 EP18000799.9A EP18000799A EP3470236B1 EP 3470236 B1 EP3470236 B1 EP 3470236B1 EP 18000799 A EP18000799 A EP 18000799A EP 3470236 B1 EP3470236 B1 EP 3470236B1
Authority
EP
European Patent Office
Prior art keywords
luminescent
motif
data carrier
motif region
color
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.)
Active
Application number
EP18000799.9A
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German (de)
English (en)
Other versions
EP3470236A1 (fr
Inventor
Peter Schiffmann
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.)
Giesecke and Devrient Currency Technology GmbH
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Giesecke and Devrient Currency Technology GmbH
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 Giesecke and Devrient Currency Technology GmbH filed Critical Giesecke and Devrient Currency Technology GmbH
Publication of EP3470236A1 publication Critical patent/EP3470236A1/fr
Application granted granted Critical
Publication of EP3470236B1 publication Critical patent/EP3470236B1/fr
Active legal-status Critical Current
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
    • B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
    • B42D25/30—Identification or security features, e.g. for preventing forgery
    • B42D25/351—Translucent or partly translucent parts, e.g. windows
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
    • B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
    • B42D25/30—Identification or security features, e.g. for preventing forgery
    • B42D25/36—Identification or security features, e.g. for preventing forgery comprising special materials
    • B42D25/378—Special inks
    • B42D25/387—Special inks absorbing or reflecting ultraviolet light

Definitions

  • the invention relates to a data carrier, in particular a document of value or security, with a substrate which is translucent in the visible spectral range with opposite first and second main surfaces and with luminescent motif regions arranged on both the first and the second main surfaces.
  • Data carriers such as documents of value or identity documents, but also other valuable objects, such as branded articles, are often provided with security elements for security purposes, which allow the authenticity of the data carrier to be checked and which at the same time serve as protection against unauthorized reproduction.
  • luminescent substances to secure documents of value or identity documents.
  • Various luminescent substances and luminescent colors are known for this purpose, the term luminescent substance including fluorescent substances, phosphorescent substances and anti-Stokes substances.
  • Luminescent substances are also used for product protection and in the form of phosphorescent substances, for example for securing emergency exits.
  • Fluorescent security elements for documents of value are, for example, from the publications GB 2 300 596 A and EP 2 028 017 A2 known.
  • the security features described there are limited in their design options. Among other things, motifs with text components or digits cannot be used meaningfully, since they are displayed reversed in at least one of the test situations and therefore easily confuse the user.
  • EP 2 028 017 A2 discloses the preamble of claim 1.
  • a first fluorescent layer between two opaque layers with recesses and a second fluorescent layer are provided on one or on two transparent, ie non-translucent, substrates.
  • a colored opaque layer can be present on the second opaque layer.
  • the layers opaque in visible light can also be opaque for UV light.
  • the object of the invention is to specify a data carrier of the type mentioned at the outset with an attractive appearance and high security against forgery.
  • the term “overlapping” refers to the vertical projection of the area covered by the areas into a common one Level.
  • the term “congruent” refers to a projection of the areas involved into a common level.
  • the UV absorber at least in some areas prevents the luminescent motif area arranged on the opposite main area from being excited to luminescence when the data carrier is exposed to UV radiation.
  • the UV absorber absorbs at least the excitation wavelengths of one of the luminescent motif areas, preferably even the excitation wavelengths of both luminescent motif areas.
  • the excitation wavelength ranges of the two luminescent motif areas can be the same or different.
  • the UV absorber can be part of a fiber-based substrate, for example in the form of TiO 2 , can be part of an ink acceptance layer of a film substrate which is transparent per se, for example based on TiO 2 , or can be present as a printing layer on a translucent substrate.
  • the first luminescent motif area Due to the additional colored absorbing motif area and its possible adjustment to the second luminescent motif area, diverse interactions between the motifs of the luminescent motif areas can be generated with UV excitation from opposite sides of the data carrier.
  • the first luminescent motif area When the first main surface of the data carrier is exposed to UV radiation, the first luminescent motif area is excited to emit the first luminescent color, which is not only visible when the first main surface is viewed, but also appears when the second main surface is viewed due to the translucency of the substrate. There, however, the first luminescent color is removed from the places where the colored absorbing motif area is present absorbed and replaced, for example, by the intrinsic color and / or a further luminescent color of the colored absorbing motif area, as explained in more detail below.
  • first and second luminescent motif areas overlap at least partially.
  • first and second luminescent motif areas are even congruent.
  • the colored absorbent motif area is non-luminescent.
  • the intrinsic color of the colored absorbing motif area essentially corresponds to the luminescent color of the second luminescent motif area.
  • the colored absorbent motif area can also be luminescent. After UV excitation, he can emit the same luminescent color as the second luminescent motif area and thereby camouflage his presence again when the second main surface is exposed to UV.
  • the colored absorbing motif area can also emit a different luminescent color than the second luminescent motif area.
  • the first and / or second luminescent motif area is advantageously not visually recognizable, and is in particular transparent or has a white body color.
  • the colored absorbent motif area can be arranged from the substrate above the second luminescent motif area, but it can also be in a recess in the second luminescent motif area, or can be arranged below the second luminescent motif area and even below the UV absorber. In the latter case, the UV absorber can camouflage the presence of the colored absorbent motif area when viewed from the second main area.
  • the colored absorbent motif area advantageously contains, as an absorber, a dye or an organic or inorganic colored pigment, the intrinsic color of which is complementary to the first luminescent color.
  • the colored absorbing motif area advantageously does not absorb broadband, but in particular selectively essentially only the first luminescent color.
  • the colored absorbent motif region contains a thermochromic or photochromic substance as an absorber.
  • the thermochromic or photochromic material only shows its effect when it is visually visible.
  • a photochromic substance must be activated by UV excitation, and depending on the type, a thermochromic substance must be converted into the visually visible state by applying heat or cooling.
  • a further colored motif area is provided, which overlaps the second luminescent motif area is arranged on the first main surface and which absorbs the second luminescent color.
  • the luminescent motif areas each show a monochrome motif when viewed with UV excitation and viewed from the same side.
  • at least one luminescent motif area can display multicolored luminescent motifs.
  • at least one luminescent motif area can contain fluorescent white, which is formed from three basic fluorescent colors red, green and blue. The colored absorbing motif area can then filter out a part of the luminescent color spectrum on the opposite side and thus change the color impression there in a targeted manner.
  • the UV absorber advantageously contains titanium dioxide in the anatase or rutile modification, Tinuvin 400 or Tinuvin 460.
  • the UV absorber can be arranged on each of the main surfaces of the substrate or can also be provided in the substrate itself.
  • the luminescent motif areas are screened and consist of a large number of similar screen elements.
  • the colored absorbing motif areas are only rasterized in configurations. For example, tiles made of squares, triangles or circles can be considered as raster elements.
  • the edge length of the grid elements or the grid spacing is advantageously in the range from 100 ⁇ m to 5000 ⁇ m, preferably in the range from 200 ⁇ m to 3000 ⁇ m.
  • the substrate is translucent, but preferably not transparent.
  • translucency means light permeability
  • transparency means image or view permeability.
  • a Translucent but not transparent substrate therefore lets light through, but scatters so strongly that objects behind or below it cannot be seen from the opposite side.
  • the translucent but not transparent substrate can be, for example, a paper substrate or a hybrid substrate with a paper layer.
  • the data carrier advantageously also contains at least one reference motif that is visible without stimulation, the appearance of which corresponds to the appearance of one of the luminescent motif areas after UV stimulation, and which can therefore be used by the viewer as a reference for the appearance of the motif areas.
  • the data carrier is advantageously a banknote, a passport, an identification card, a tax stamp, a voucher, a certificate, a certificate, a certificate or product security.
  • the luminescent colors mentioned can each be fluorescent colors, phosphorescent colors or anti-Stokes colors.
  • a UV hand lamp can be used to check the authenticity of the data carrier, or else a sensor system in which at least one image recording with UV excitation on a first side and one image recording with UV excitation on a second side are evaluated by means of an image sensor.
  • Figure 1 shows schematically the appearance of a bank note 10 equipped according to the invention after excitation with UV radiation.
  • Fig. 1 (a) the appearance of the banknote 10 when viewing the front 10V of the banknote with UV excitation from the same side, that is to say the front 10V.
  • a fluorescent motif 14 here in the form of a segmented sphere, is visible in a feature area 12, the individual segments 16 all shining with red fluorescent color in the exemplary embodiment. Without excitation, the fluorescent motif 14 is not visible on the front 10V, since the segments 16 each have a white body color and are therefore not visible against the background of the white banknote paper.
  • Figure 1 (b) shows the appearance of the banknote 10 when looking at the back 10R of the banknote with UV excitation from the same side, that is Back 10R.
  • the spherical motif of the front is also visible in the feature area 12 as the fluorescent motif 18, but is now continuously in blue color.
  • segments 20A glow with blue fluorescent color
  • segments 20B appear with blue (or cyan) intrinsic color.
  • UV excitation only the segments 20B with their own blue color are visible, while the segments 20A have a white body color and are not recognizable against the background of the white banknote paper.
  • the motif 18 is therefore partially visible on the back 10R without suggestion.
  • Fig. 2 schematically shows a cross section of the bank note 10 in the feature area 12, the back 10 R of the bank note pointing upward in the orientation shown.
  • the banknote paper 30 of the banknote 10 is translucent but not transparent for UV radiation and for visible light. At least the banknote paper is translucent for the selected wavelength or the selected wavelength range.
  • a first luminescent motif area 32 is arranged on the front 10V of the banknote 10 on the banknote substrate 30, which luminesces in a first luminescent color, in the exemplary embodiment in red luminescent color, when excited by UV.
  • a second luminescent motif area 34 is arranged congruently with the first motif area 32, which luminesces in a second, different luminescent color when UV-excited, namely in the exemplary embodiment in blue luminescent color.
  • the shape of the motif areas 32, 34 corresponds to the segments 16 and 20A, 20B of the spherical motif Fig. 1 .
  • a UV absorber layer 36 is provided on the back 10R, which prevents UV excitation radiation incident from the front 10V or back 10R from reaching the motif area arranged on the opposite side. This ensures that UV excitation radiation incident from the front 10V only excites the first motif area 32 and UV excitation radiation incident from the rear 10R only the second motif area 34 for luminescence.
  • a colored motif area 38 in the form of the segments 20B is arranged on the second luminescent motif area 34 in a partial area, which is the first (ie present red) luminescent color of the first luminescent motif area 32 is absorbed.
  • the colored motif area 38 has an intrinsic color visible without excitation, in the exemplary embodiment a blue intrinsic color which essentially corresponds to the blue luminescent color of the second luminescent motif region 34.
  • the second luminescent motif region 34 is excited to luminescence 42 with blue luminescent color when UV radiation 40 is applied to the back of the banknote 10R.
  • the UV absorber 36 prevents the UV radiation 40 from reaching the feature area 32 arranged on the front 10V and stimulating luminescence. Since the motif area 38 also has a blue inherent color 44, the spherical motif 18 appears only with a blue color when excited and viewed from the back of the banknote 10R, as in FIG Fig. 1 (b) shown. It is assumed that in addition to UV radiation 40, as usual, there is also ambient light in the visible spectral range (daylight or artificial light), which is reflected by the motif area 38 and makes its own color 44 visible.
  • the first luminescent motif area 32 is excited to luminescence with red luminescent color.
  • the UV absorber 36 prevents the UV radiation from reaching the feature region 34 arranged on the rear 10R and stimulating luminescence.
  • the ball motif 14 thus appears only with a red color when excited and viewed from the front of the banknote 10V.
  • the UV absorber 36 can be present in variants (not shown) on the front 10V, below the motif area 32, on both sides 10R and 10V of the substrate 30, in the substrate 30 or in combinations of the aforementioned variants.
  • Figure 3 illustrated according to the situation of the Fig. 1 (c) the conditions with UV irradiation of the front side of the banknote 10V and viewing from the opposite side of the banknote back 10R.
  • the first luminescent motif area 32 is excited to luminescence 52 with red luminescence color by the UV radiation 50 of the front of the banknote 10V. Due to the translucency of the banknote paper 30, the red luminescent radiation 52 is also visible on the back of the banknote 10R.
  • the UV absorber 36 prevents the UV radiation 50 from reaching the feature region 34 arranged on the rear 10R, it does not block the red luminescent radiation 52 in the visible spectral range.
  • the red luminescent radiation 52 is absorbed by the motif region 38, so that in the areas in which the motif area 38 overlaps the first luminescent motif area 32, it is not the red luminescent radiation 52 but the blue inherent color 44 of the motif area 38 that is visible instead.
  • daylight is also present, which is reflected by motif area 38 and makes its own color 44 visible.
  • the colored motif area 38 is non-luminescent, but in other configurations it can itself contain a luminescent substance.
  • This can be a blue luminous luminescent substance, for example, so that the in Fig. 1 (b) shown situation a homogeneous blue luminescent appearance of the spherical motif 18 results.
  • the luminescent substance of the motif area 38 can also shine in a different luminescent color.
  • the colored motif area 38 is not on the second motif area 34 but in a recess in the second motif area 34-in Fig. 2 also arranged on the UV absorber 36.
  • the red luminescence radiation 52 is also visible in this embodiment only in the areas outside the motif area 38, while the red luminescence radiation is absorbed in the motif area 38 and the inherent color of the motif area 38 is visible instead.
  • the motif area 38 can be non-luminescent or also luminescent, wherein the luminescent color can be the same or different from the luminescent color of the second motif area 34.
  • the absorbent motif area 38 is arranged below the UV absorber 36, so that the latter can visually hide the second motif area 34 on the rear side 10R.
  • the motif area 38 is then visible with UV excitation from the front 10V and viewed from the rear 10R.
  • the UV absorber 36 may consist of TiO 2 with a layer thickness sufficient for visual coverage.
  • the motif area 38 can be non-luminescent or luminescent with any luminescent color.
  • the UV absorber 36 can also cover only a partial area of the second motif area 34 and / or the UV absorber can be present on both sides of the banknote or in the banknote paper 30.
  • a plurality of colored motif areas with an absorption effect are also provided for at least one of the luminescent radiations can.
  • a blue-absorbing motif area 38 can also be arranged on the front 10V, which, for example, has a red inherent color. The interaction of the luminescent motif areas and the absorbent motif areas enables complex designs with a high securing effect to be created.
  • the motif area 32 can also consist of more than one fluorescent dye or luminesce with more than one fluorescent color.
  • the color-absorbing motif area 38 will preferably absorb only one of the plurality of fluorescent colors.
  • the second region 34 can be omitted.
  • a different impression also arises for the viewer (but only) with UV excitation from the front 10V when viewed from the front 10V or the rear 10R.

Landscapes

  • Inspection Of Paper Currency And Valuable Securities (AREA)
  • Credit Cards Or The Like (AREA)

Claims (16)

  1. Support de données, en particulier document de valeur ou de sécurité, comprenant un substrat translucide dans le domaine spectral visible ayant des première et deuxième surfaces principales opposées et ayant des zones de motif luminescentes agencées tant sur la première que sur la deuxième surface principale,
    - sur la première surface principale, une première zone de motif luminescente est agencée, laquelle, lors d'une excitation par UV, engendre de la luminescence dans une première couleur de luminescence,
    - sur la deuxième surface principale, une deuxième zone de motif luminescente est agencée, laquelle, lors d'une excitation par UV, engendre de la luminescence dans une deuxième et différente couleur de luminescence,
    - entre la première et la deuxième zone de motif luminescente, un absorbeur UV est agencé, et
    - de manière se chevauchant par rapport à la première zone de motif luminescente sur la deuxième surface principale, une zone de motif colorée est agencée, laquelle absorbe la première couleur de luminescence,
    caractérisé en ce que
    la zone de motif colorée absorbante n'absorbe pas la deuxième couleur luminescente.
  2. Support de données selon la revendication 1, caractérisé en ce que la première et la deuxième zone de motif luminescente se chevauchent mutuellement au moins partiellement.
  3. Support de données selon la revendication 1 ou 2, caractérisé en ce que la première et la deuxième zone de motif luminescente sont réalisées de façon coïncidente entre elles.
  4. Support de données selon au moins une des revendications de 1 à 3, caractérisé en ce que la zone de motif colorée absorbante n'est pas luminescente.
  5. Support de données selon au moins une des revendications de 1 à 3, caractérisé en ce que la zone de motif colorée absorbante est luminescente et émet après excitation par UV la même couleur de luminescence que la deuxième zone de motif luminescente.
  6. Support de données selon au moins une des revendications de 1 à 5, caractérisé en ce que la zone de motif colorée absorbante absorbe en tant qu'absorbeur à bande étroite uniquement la première couleur de luminescence.
  7. Support de données selon au moins une des revendications de 1 à 6, caractérisé en ce que la première et/ou la deuxième zone de motif luminescente n'est pas reconnaissable visuellement et est en particulier transparente ou réalisée avec une couleur de corps blanche.
  8. Support de données selon au moins une des revendications de 1 à 7, caractérisé en ce que la zone de motif colorée absorbante est agencée dans un évidement de la deuxième zone de motif luminescente.
  9. Support de données selon au moins une des revendications de 1 à 8, caractérisé en ce que la zone de motif colorée absorbante contient en tant qu'absorbeur un colorant ou un pigment teinté organique ou inorganique dont la propre couleur est complémentaire à la première couleur de luminescence.
  10. Support de données selon au moins une des revendications de 1 à 9, caractérisé en ce que la zone de motif colorée absorbante contient en tant qu'absorbeur une substance thermochromique ou photochromique.
  11. Support de données selon au moins une des revendications de 1 à 10, caractérisé en ce que, de manière se chevauchant par rapport à la deuxième zone de motif luminescente sur la première surface principale, une autre zone de motif colorée est agencée, laquelle absorbe la deuxième couleur de luminescence ; et/ou
    la première zone de motif luminescente engendre de la luminescence dans au moins deux couleurs de luminescence, cependant que la zone de motif colorée absorbante n'absorbe pas une des au moins deux couleurs de luminescence.
  12. Support de données selon au moins une des revendications de 1 à 11, caractérisé en ce que l'absorbeur UV contient du dioxyde de titane de forme anatase ou de modification rutile, du Tinuvin 400 ou du Tinuvin 460.
  13. Support de données selon au moins une des revendications de 1 à 12, caractérisé en ce que les zones de motif luminescentes et les zones de motif colorées absorbantes sont respectivement tramées et consistent en une pluralité d'éléments de trame similaires.
  14. Support de données selon au moins une des revendications de 1 à 13, caractérisé en ce que le support de données contient au moins un motif de référence qui est visible sans excitation et dont l'aspect correspond à l'aspect d'une des zones de motif luminescentes après excitation par UV.
  15. Support de données selon au moins une des revendications de 1 à 14, caractérisé en ce que le support de données est un billet de banque, un passeport, une carte d'identification, un timbre fiscal, un bon, un certificat, un bulletin, un acte ou une sécurisation de produit.
  16. Procédé de fabrication d'un support de données selon une des revendications de 1 à 15, dans lequel
    - un substrat translucide ayant des première et deuxième surfaces principales opposées est mis à disposition,
    - le substrat translucide sur la première surface principale est pourvu d'une première zone de motif luminescente qui, lors d'une excitation par UV, engendre de la luminescence dans une première couleur de luminescence,
    - le substrat translucide sur la deuxième surface principale est pourvu d'une deuxième zone de motif luminescente qui, lors d'une excitation par UV, engendre de la luminescence dans une deuxième et différente couleur de luminescence,
    - entre la première et la deuxième zone de motif luminescente, un absorbeur UV est agencé, et
    - de manière se chevauchant par rapport à la première zone de motif luminescente sur la deuxième surface principale, une zone de motif colorée est agencée, laquelle absorbe la première couleur de luminescence et n'absorbe pas la deuxième couleur luminescente.
EP18000799.9A 2017-10-12 2018-10-08 Support de données pourvu de zones à motif luminescentes Active EP3470236B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102017009477.2A DE102017009477A1 (de) 2017-10-12 2017-10-12 Datenträger mit lumineszierenden Motivbereichen

Publications (2)

Publication Number Publication Date
EP3470236A1 EP3470236A1 (fr) 2019-04-17
EP3470236B1 true EP3470236B1 (fr) 2020-05-27

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ID=63798739

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Application Number Title Priority Date Filing Date
EP18000799.9A Active EP3470236B1 (fr) 2017-10-12 2018-10-08 Support de données pourvu de zones à motif luminescentes

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EP (1) EP3470236B1 (fr)
DE (1) DE102017009477A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3915778B1 (fr) 2020-05-27 2023-08-16 Giesecke+Devrient Mobile Security GmbH Feuille fluorescente coextrudée
DE102021001018A1 (de) 2021-02-25 2022-08-25 Giesecke+Devrient Currency Technology Gmbh Sicherheitselement mit einem Lumineszenzmerkmal, Datenträger und Herstellungsverfahren
DE102021111065A1 (de) * 2021-04-29 2022-11-03 Leuchtstoffwerk Breitungen Gmbh Sicherheitselement für Wertgegenstände mit in nur in einer Richtung wirkendem Wasserzeichen
DE102021002495A1 (de) * 2021-05-11 2022-11-17 Giesecke+Devrient Currency Technology Gmbh Sicherheitselement mit Lumineszenzmerkmal und Datenträger mit einem solchen Sicherheitselement

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2300596B (en) 1995-05-10 1998-11-04 Portals Ltd Composite material having fluorescent features
US7654581B2 (en) * 2005-05-06 2010-02-02 Canadian Bank Note Company, Limited Security document with ultraviolet authentication security feature
GB2452078B (en) 2007-08-23 2009-12-23 Rue De Int Ltd Security devices for security substrates
EP2112274A1 (fr) * 2008-04-22 2009-10-28 Hueck Folien Ges.m.b.H. Elément de sécurité ayant des caractéristiques fluorescentes

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

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EP3470236A1 (fr) 2019-04-17
DE102017009477A1 (de) 2019-04-18

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