EP3842254A1 - Élément de sécurité luminescente personnalisable - Google Patents

Élément de sécurité luminescente personnalisable Download PDF

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Publication number
EP3842254A1
EP3842254A1 EP19306768.3A EP19306768A EP3842254A1 EP 3842254 A1 EP3842254 A1 EP 3842254A1 EP 19306768 A EP19306768 A EP 19306768A EP 3842254 A1 EP3842254 A1 EP 3842254A1
Authority
EP
European Patent Office
Prior art keywords
radiating element
spectrum
blocking element
region
blocking
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP19306768.3A
Other languages
German (de)
English (en)
Inventor
Nina LARINA
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.)
Thales DIS France SA
Original Assignee
Thales DIS France SA
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 Thales DIS France SA filed Critical Thales DIS France SA
Priority to EP19306768.3A priority Critical patent/EP3842254A1/fr
Priority to EP20821014.6A priority patent/EP4081406A1/fr
Priority to PCT/EP2020/085842 priority patent/WO2021130035A1/fr
Publication of EP3842254A1 publication Critical patent/EP3842254A1/fr
Withdrawn legal-status Critical Current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
    • B42D25/20—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof characterised by a particular use or purpose
    • B42D25/23—Identity cards
    • 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
    • B42D13/00—Loose leaves modified for binding; Inserts
    • 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
    • B42D25/20—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof characterised by a particular use or purpose
    • B42D25/24—Passports
    • 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
    • B42D25/309—Photographs
    • 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
    • B42D25/346—Perforations
    • 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
    • B42D25/382—Special inks absorbing or reflecting infrared light
    • 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
    • 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
    • B42D25/40—Manufacture
    • B42D25/405—Marking
    • B42D25/41—Marking using electromagnetic radiation
    • 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
    • B42D25/40—Manufacture
    • B42D25/405—Marking
    • B42D25/43—Marking by removal of material
    • B42D25/435—Marking by removal of material using electromagnetic radiation, e.g. laser
    • 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
    • B42D25/40—Manufacture
    • B42D25/45—Associating two or more layers

Definitions

  • the present invention relates to a data carrier comprising at least one security element according to claim 1, a security document comprising such a data carrier according to claim 14, and a method of producing at least one security element in a data carrier according to claim 15, respectively.
  • Security elements in data carriers used as or in security documents such as identity cards, credit cards, banknotes or the like are usual features in the field of counterfeit protection.
  • various solutions are known. Some of the known solutions involve security elements with specific optical properties, including those based on the phenomenon of luminescence.
  • the luminescent authenticity feature is applied to or incorporated in a composite card, and the authenticity feature is personalized with a high-energy beam in that the intensity and/or wavelength of the beam is chosen such that local bleaching of the structure of the authenticity feature takes place, and the destruction of a chromophoric substance of the luminescent security feature cannot be detected in visible light.
  • EP 2 424 735 B1 for example, a process for securing an identification document and secure identification document are known; the document comprising a layer of UV sensitive ink(s) applied on top of a layer of a transparent ablation varnish.
  • a personalized graphical pattern is then generated, wherein during the personalization process parts of the UV sensitive ink are removed by means of a laser beam, and wherein the said pattern can only be revealed under UV radiation.
  • a data carrier which comprises at least one blocking element, at least one radiating element, at least one unblocking region being provided in the blocking element, and at least one security element.
  • the radiating element is arranged after the blocking element with respect to an extension direction extending from the blocking element towards the radiating element. At least one region of the radiating element is uncovered by the at least one unblocking region of the blocking element when seen along the extension direction, whereby the at least one security element is formed.
  • the blocking element is configured to block impinging electromagnetic radiation constituting a blocking element spectrum.
  • the radiating element is configured to emit electromagnetic radiation constituting a radiating element emission spectrum upon irradiation by electromagnetic radiation constituting a radiating element excitation spectrum, the radiating element excitation spectrum differing from the radiating element emission spectrum.
  • the blocking element and the radiating element are further configured such, i) that the blocking element spectrum essentially corresponds to the radiating element excitation spectrum, or ii) that the blocking element spectrum essentially corresponds to the radiating element emission spectrum.
  • the blocking element is either configured to block electromagnetic radiation that can excite the radiating element or to block electromagnetic radiation that is emitted by the excited radiating element during the relaxation of the excited radiating element.
  • Blocking the impinging electromagnetic radiation by the blocking element refers to blocking the electromagnetic radiation impinging on the blocking element essentially along the extension direction, i.e. the radiation coming from an outside of the data carrier, as well as the radiation impinging on the blocking element along a direction extending essentially opposite to the extension direction, i.e. radiation coming from an inside of the data carrier.
  • the blocking element prevents excitation of the radiating element.
  • the blocking element prevents emission of the emission radiation emitted by the relaxing radiating element towards an outside of the data carrier.
  • the unblocking region allows excitation radiation, i.e. electromagnetic radiation constituting the radiating element excitation spectrum, to be transmitted through the blocking element at the position of the unblocking region and to impinge on the radiating element being arranged below the unblocking region, whereby the radiating element is excited at the location of impingement of the radiation.
  • the unblocking region allows the emission radiation of the relaxing radiating element, i.e. the radiating element emission spectrum, to be transmitted through the blocking element and to reach an outside of the data carrier at the position of the unblocking region.
  • the blocking element acts like a filter for the radiating element, and wherein the radiating element is only revealed at positions where the blocking element comprises unblocking regions.
  • the blocking element in the sense of a filter element is preferably a selective filter element, wherein it selectively blocks one or more particular wavelengths and at the same time has as low impact as possible on electromagnetic radiation of other wavelengths.
  • it can allow a combination of the security element according to the present invention with other security elements known in the art, wherein said other security elements are based on these other wavelength regions.
  • the expressions "uncovered” or “revealed” are used herein to indicate that excitation radiation can reach and excite the radiating element and that emission radiation being emitted from the excited radiating element is made detectable at an outside of the data carrier, respectively.
  • Said one or more unblocking regions preferably constitute an alphanumeric character and/or an image and/or a machine-readable optical element such as a bar code or a QR code, whereby a security element in the form of an alphanumeric character and/or an image and/or a machine-readable optical element such as a bar code or a QR code is generated.
  • blocking element spectrum refers to a spectrum being composed of one or more wavelengths.
  • the expression “essentially correspond” is used to indicate that the one or more wavelengths constituting the blocking element spectrum, the radiating element excitation spectrum, and the radiating element emission spectrum, respectively, are essentially the same.
  • the intensity of electromagnetic radiation that impinges on the blocking element is reduced by the blocking element by about 70 % or more, preferably by about 80 % or more. That is, if electromagnetic radiation constituting the radiating element excitation spectrum impinges on the blocking element, its intensity is reduced by about 70 % or more, preferably by about 80 % or more.
  • the blocking element essentially prevents excitation of the radiating element by the electromagnetic radiation constituting said radiating element excitation spectrum because the intensity is too low.
  • the electromagnetic radiation constituting the radiating element emission spectrum impinges on the blocking element, its intensity is reduced by about 70 % or more, preferably by about 80 % or more.
  • the blocking element essentially prevents transmission and therefore detection of the emission radiation emitted by the radiating element towards an outside.
  • the radiating element is preferably luminescent, preferably a luminescent ink or additive, particularly preferably a fluorescent ink or a phosphorescent ink.
  • a luminescent ink or additive particularly preferably a fluorescent ink or a phosphorescent ink.
  • suitable luminescent pigments can be selected from the LumiluxTM product range of Honeywell. Ready luminescent inks can be acquired for example from security ink ranges of Sicpa (Switzerland) or Luminescence Sun Chemical Security (UK). Said inks or additives are preferably applied by conventional printing methods.
  • the radiating element can be configured to absorb electromagnetic radiation constituting the radiating element excitation spectrum being in the ultraviolet region, preferably in the near-ultraviolet region, and/or in the visible region and/or in the infrared region, preferably in the near-infrared region, of the electromagnetic spectrum and to emit electromagnetic radiation constituting the radiating element emission spectrum being in the ultraviolet region, preferably in the near-ultraviolet region, and/or in the visible region and/or in the infrared region, preferably in the near-infrared region, of the electromagnetic spectrum.
  • the radiating element excitation spectrum can correspond to electromagnetic radiation in the ultraviolet region, preferably in the near-ultraviolet region, in the visible region, and/or in the infrared region, preferably in the near-infrared region, of the electromagnetic spectrum.
  • the radiating element emission spectrum can correspond to electromagnetic radiation in the ultraviolet region, preferably in the near-ultraviolet region, in the visible region, and/or in the infrared region, preferably in the near-infrared region, of the electromagnetic spectrum.
  • the at least one region of the radiating element being uncovered by the unblocking region of the blocking element constitutes the security element when seen or detected under ultraviolet radiation and/or visible radiation and/or infrared radiation.
  • the radiating element can be used by means of a UV-fluorescent ink which absorbs electromagnetic radiation in the ultraviolet region, whereby it is excited. Upon relaxation into its ground state, the fluorescent species within the ink emits electromagnetic radiation in the visible region of the electromagnetic spectrum, for example.
  • an IR-fluorescent ink it is excited into its excited state upon excitation with electromagnetic radiation in the infrared region of the electromagnetic spectrum, for example.
  • the fluorescent species within the ink Upon relaxation into its ground state, the fluorescent species within the ink emits electromagnetic radiation in the infrared region of the electromagnetic spectrum, although at longer wavelengths as compared to the excitation radiation, for example.
  • Said emission radiation can be detected by common infrared detectors known in the art, such as forensic NIR viewers or a photo camera with an IR filter.
  • the blocking element is preferably configured to absorb and/or reflect and/ or scatter the impinging electromagnetic radiation constituting the blocking element spectrum.
  • Said blocking element spectrum preferably likewise corresponds to electromagnetic radiation in the ultraviolet region, preferably in the near-ultraviolet region, and/or in the visible region and/or in the infrared region, preferably in the near-infrared region, of the electromagnetic spectrum.
  • the blocking element preferably comprises species which absorb and/or scatter and/or reflect wavelength ranges that are comprised in or constitute the radiating element emission spectrum or the radiating element excitation spectrum.
  • the blocking element can correspond to an ink or an additive which absorbs electromagnetic radiation in the ultraviolet region and being based on a 2-hydroxyphenyl-s-triazine derivative such as the commercially available Tinuvin® 1600 from BASF.
  • Examples of inks which absorb in the infrared region are the commercially available spectraCARD IRB from Printcolor or MSD4800 or MSC3600 from H. W. Sands.
  • the radiating element and/or the blocking element preferably extends entirely or partially along a width of the data carrier with respect to a transverse direction running perpendicularly to the extension direction.
  • the radiating element and the blocking element are arranged essentially congruently with respect to the extension direction.
  • the radiating element and the blocking element are located at the same place with respect to the extension direction and have the same geometric extension along the transverse direction. In this case, it is ensured that the blocking element can block, except at the location(s) of the unblocking region(s), irradiation of the radiating element or emission of radiation emitted by the radiating element, respectively.
  • the blocking element and/or the radiating element are preferably provided in the form of layers, which layer(s) extend partially or entirely along the transverse direction.
  • the blocking element could be provided as a layer of ink, which ink comprises at least one of absorbing, reflecting and scattering species.
  • the radiating element could be provided as a layer of ink, which ink comprises luminescent species.
  • the blocking element and/or the radiating element are provided in a patterned manner. That is, the radiating element and/or the blocking element can have the form of a pixelated pattern. Additionally or alternatively, two or more unblocking regions can be provided in the blocking element in the form of a pixelated pattern. Particularly preferred in this context is a radiating element in the form of a pixelated pattern, wherein different pixels have different properties such as different excitation or emission properties, see also further below. For example, two or more pixels having different excitation properties could be two or more pixels that are excited by electromagnetic radiation of different wavelengths. Analogously, two or more pixels having different emission properties could be two or more pixels that emit electromagnetic radiation of different wavelengths.
  • a pixel in the sense of the present invention should be understood as a unitary element of confined geometrical extensions which is uniform in terms of its excitation properties and radiation properties, if it serves the purpose of a radiating element, or in terms of its blocking properties or sensitivity to impinging electromagnetic radiation, if it serves the purpose of a blocking element, respectively.
  • Conceivable geometrical extensions are in the range of about 20 micrometres to 1000 micrometres in a first horizontal direction and a second horizontal direction running perpendicularly to the first horizontal direction, and wherein the first horizontal direction and the second horizontal direction run perpendicularly to the extension direction.
  • a radiating element being provided in the form of a pixelated pattern could be constituted by dots of luminescent ink that are arranged in one or more arrays, wherein the dots have a size of about 20 micrometres to 500 micrometres. Said two or more unblocking regions being provided in the blocking element in the form of a pixelated pattern allow to selectively uncover or reveal particular pixels of the radiating element.
  • a security element of multiple colours being visible/detectable upon illumination with e.g. infrared or ultraviolet light but being invisible under daylight could be provided.
  • the pixelated patterns could be configured such, that the additive colour mixing scheme applies.
  • the radiating element could be constituted by dots, arrays of dots, arrays constituted by sub-arrays of dots or otherwise shaped elements, wherein the individual dots emit electromagnetic radiation of a wavelength that constitutes the colour red, green or blue.
  • a printed line of one color can be considered as an array or a sub-array of pixels or dots in terms of addressing individual dots in the process of generating the security element according to the present invention. If dots that emit as red, green and blue are uncovered, then an overall colour of white is created. If dots that emit as red and green are uncovered, then an overall colour of yellow is created. If dots that emit as green and blue are uncovered, then an overall colour of cyan is created, etc. It could be also conceivable that the initial pixelated pattern constituting either the radiating element or the blocking element or the both is configured differently than application of additive mixing of visual emitted colors.
  • the blocking element is preferably configured to interact with electromagnetic radiation, preferably with laser radiation or LED light or radiation from other sources, such that the unblocking region is generated upon interaction with said electromagnetic radiation.
  • the blocking element could be configured so as to enable a laser personalization, wherein laser radiation is irradiated onto the blocking element so as to generate unblocking regions and therefore a security element that constitutes an image and/or an alphanumeric character such as a name, a date, a photograph, a state emblem, and/or a machine-readable optical element such as a bar code or a QR code etc.
  • Such personalization can likewise be achieved by irradiating electromagnetic radiation of other sources such as for example LED light sources or other sources.
  • the unblocking region preferably corresponds to a recess or a transparent or a translucent region within the blocking element.
  • Transparent or translucent regions in the context of the present invention means that the one or more wavelengths constituting the radiating element excitation spectrum or the radiating element emission spectrum, respectively, are transmitted trough said regions.
  • the recess can be generated in the blocking element by laser ablating the blocking element. It is however likewise conceivable to provide the blocking element as a material capable of being bleached, discoloured or otherwise physically and/or chemically and/or optically altered upon interaction with electromagnetic radiation. Said bleached, discoloured or altered region then corresponds to the transparent or translucent region mentioned above.
  • the data carrier can further comprise at least one preferably transparent intermediate layer, wherein the radiating element and/or the blocking element is arranged on and/or within the intermediate layer.
  • a transparent layer in the sense of the present invention refers to a layer that is as transmissive as possible for electromagnetic radiation being in the entire ultraviolet, the visible and the infrared region of the electromagnetic spectrum, i.e. not only for electromagnetic radiation constituting the radiating element emission spectrum and the radiating element excitation spectrum. Being as transmissive as possible includes sufficient transmissivity for electromagnetic radiation so that the presence of the said intermediate layer has no or very low influence on the generation or the functionality of the security element according to the present invention.
  • the transmissivity of the transparent layer(s) to the electromagnetic radiation within the ultraviolet, the visible and the infrared spectral regions can be limited by the inherent physical and chemical properties of the material of the transparent layer(s) and by eventual presence of additives, preferably non-scattering additives, if they do not interfere with the generation or the functionality of the security element according to the present invention.
  • the intermediate layer is preferably made of plastics, particularly preferably made from a polycarbonate, from a polyester such as polyethylene terephthalate, or from a polyolefin such as polyethylene or polypropylene.
  • plastics particularly preferably made from a polycarbonate, from a polyester such as polyethylene terephthalate, or from a polyolefin such as polyethylene or polypropylene.
  • the radiating element and/or the blocking element can be printed on the intermediate layer, which is particularly preferred if the radiating element and the blocking element are applied in the form of printable inks.
  • it is also conceivable to provide the radiating element and/or the blocking element within the intermediate layer e.g. by embedding these elements into the intermediate layer during the manufacturing of the intermediate layer. This procedure is particularly preferred if the radiating element and the blocking element are provided by means of additives.
  • the additives can be dispersed into a polymer matrix by using standard extrusion equipment.
  • the data carrier can comprise at least one further radiating element, wherein the further radiating element is configured to emit electromagnetic radiation constituting a further radiating element emission spectrum upon irradiation by electromagnetic radiation constituting a further radiating element excitation spectrum, the further radiating element excitation spectrum differing from the further radiating element emission spectrum.
  • the radiating element excitation spectrum and the further radiating element excitation spectrum can differ from one another, and/or the radiating element emission spectrum and the further radiating element emission spectrum can differ from one another.
  • the excitation spectrum of this further radiating element can be the same or different from the excitation spectrum of the radiating element.
  • the emission spectrum of this further radiating element can be the same or different from the emission spectrum of the radiating element.
  • the radiating element in the form of the pixelated pattern it has already been disclosed previously that the pixelated pattern is preferably provided by means of dots of a certain geometrical dimension. It should be noted, however, that the radiating element and the further radiating element do not necessarily have to correspond to a pixelated pattern. To the contrary, it is likewise conceivable that the radiating element and the further radiating element correspond to two layers comprising different luminescent species, for example.
  • the radiating element and the further radiating element can be arranged on a same height with respect to the extension direction.
  • the radiating element and the further radiating element can be arranged spaced apart from one another with respect to the extension direction.
  • the radiating element and the further radiating element can be arranged next to one another, preferably on the same intermediate layer.
  • the radiating element and the further radiating element can be arranged immediately adjacent to one another or spaced apart from one another with respect to the transverse direction.
  • the radiating element and the further radiating element at least partially overlap.
  • a first luminescent ink or additive constituting the radiating element and a second luminescent ink or additive constituting the further radiating element are at least partially arranged at the same location.
  • the radiating element and the further radiating element overlap spatially entirely, e.g.
  • the radiating element and the further radiating element are spaced apart from one another, e.g. by arranging the radiating element on the top side of the intermediate layer and the further radiating element on the bottom side of the intermediate layer or on a further intermediate layer.
  • radiating elements being spaced apart from one another with respect to the extension direction it is conceivable that these elements are arranged at least partially overlapping or offset with respect to one another when viewed along the extension direction.
  • the data carrier can comprise at least one further blocking element, wherein the at least one further blocking element comprises at least one further unblocking region that uncovers at least one further region of the radiating element and/or of the further radiating element, wherein the further blocking element is configured to block impinging electromagnetic radiation constituting a further blocking element spectrum.
  • the blocking element spectrum and the further blocking element spectrum can differ from one another.
  • the further blocking element and the radiating element and/or the further radiating element are preferably configured such, that the further blocking element spectrum essentially corresponds to the radiating element excitation spectrum and/or to the further radiating element excitation spectrum.
  • the further blocking element spectrum preferably essentially corresponds to the radiating element emission spectrum and/or to the further radiating element emission spectrum.
  • the further blocking element is preferably also either configured to block electromagnetic radiation that can excite the radiating element and/or the further radiating element or to block electromagnetic radiation that is emitted by the excited radiating element and/or the excited further radiating element upon its relaxation.
  • the further blocking element is thus analogous to the blocking element and likewise comprises at least one unblocking region, wherein the radiating element and/or the further radiating element being arranged after the unblocking region of the further blocking element with respect to the extension direction is revealed by the unblocking region of the further blocking element. In this way, it is possible to cancel the blocking effect of the further blocking element at the position of the unblocking region.
  • the provision of different blocking elements and corresponding different radiating elements enables the generation of emission patterns having different emission spectra and/or the generation of emission spectra upon excitation with different excitation wavelengths, i.e. with different excitation spectra.
  • blocking element and further blocking element could be arranged on a same height with respect to the extension direction, for example on a same layer of the data carrier.
  • the blocking element and the further blocking element are arranged on a different height with respect to the extension direction, for example one after the other when seen along the extension direction and on different layers of the data carrier.
  • said blocking element and further blocking element could be arranged immediately adjacent or spaced apart from one another with respect to the transverse direction.
  • the unblocking region provided in the blocking element and the further unblocking region in the further blocking element could be arranged after one another and/or congruent with one another when seen along the extension direction.
  • the unblocking region and the further unblocking region could be arranged immediately adjacent to one another or spaced apart from one another with respect to the transverse direction.
  • a security document comprising a data carrier as described above is provided, the security document preferably being an identity card, a passport, a credit card, a bank note or the like.
  • the data carrier per se can correspond to a security document. This is the case if the data carrier is provided in the form of an identity card, for example. However, it is likewise conceivable to introduce or incorporate the data carrier into a security document. In the case of a passport for example the data carrier could be incorporated into a page of the passport.
  • a method of producing at least one security element in a data carrier comprising the steps of providing at least one blocking element, providing at least one radiating element, and generating at least one unblocking region in the blocking element.
  • the radiating element is arranged after the blocking element with respect to an extension direction extending from the blocking element towards the radiating element. At least one region of the radiating element is uncovered by the at least one unblocking region of the blocking element, whereby the least one security element is formed.
  • the blocking element is configured to block impinging electromagnetic radiation constituting a blocking element spectrum.
  • the radiating element is configured to emit electromagnetic radiation constituting a radiating element emission spectrum upon irradiation by electromagnetic radiation constituting a radiating element excitation spectrum, the radiating element excitation spectrum differing from the radiating element emission spectrum.
  • the blocking element and the radiating element are further configured such, i) that the blocking element spectrum essentially corresponds to the radiating element excitation spectrum, or ii) that the blocking element spectrum essentially corresponds to the radiating element emission spectrum.
  • the present invention is based on the fact that certain components are able to absorb electromagnetic radiation at one or more wavelengths, whereby said components are excited, and to then emit electromagnetic radiation at one or more wavelengths being different from the one or more wavelengths absorbed by the components during their relaxation.
  • Such components are commonly referred to as luminescent or photoluminescent species.
  • excitation spectrum the one or more wavelengths that are absorbed by the components during their excitation
  • emission spectrum the one or more wavelengths that are emitted during the relaxation of the excited components into their ground state
  • FIGS 1 to 4 depict excitation spectra and emission spectra of a radiating element and their selective blocking by means of an appropriate blocking element in order to illustrate the general physical principle behind the radiating element and the blocking element used in data carriers according to the present invention.
  • FIGs 5a to 9f their implementation in several embodiments of a data carrier according to the invention are discussed.
  • figure 1 depicts an example of an electronic excitation spectrum and of an electronic emission spectrum that are absorbed and emitted by a fluorescent species.
  • the absorption and fluorescence spectral bands are located in significantly different spectral regions.
  • the excitation spectrum is depicted as full line and has an absorption maximum at a wavelength of about 400 nanometers.
  • the emission spectrum is depicted as dashed line and has a fluorescence maximum at a wavelength of about 580 nanometers.
  • the emission spectrum is at longer wavelengths than the excitation spectrum. This difference in wavelengths is used in the present invention.
  • figure 4 depicts a real fluorescence spectrum of a fluorescent ink by means of dashed lines, which ink is excited upon illumination with ultraviolet (UV) light at 350 nanometers, and which emits at about 620 nanometers.
  • figure 4 also depicts an absorption spectrum by means of a full line and that has been recorded for a blocking element in the form of a blue photo-bleachable colorant which is used here to selectively block, i.e.
  • a luminescent element hereafter referred to as radiating element
  • a data carrier such as a multilayer structure that constitutes an ID document
  • blocking element a properly selected masking or filtering overlay
  • Figure 5a depicts a data carrier 1 comprising a transparent cover layer 8 and a base layer 9, between which a radiating element 3 and a blocking element 2 are provided.
  • the cover layer 8 forms an uppermost layer or top layer, which is followed by the blocking element 2, the radiating element 3, and the base layer 9.
  • the radiating element 3 is arranged after the blocking element 2 with respect to the extension direction E.
  • the radiating element 3 is a luminescent element, preferably a luminescent ink or additive, particularly preferably a fluorescent ink or a phosphorescent ink.
  • the radiating element 3 is configured to absorb electromagnetic radiation constituting a radiating element 3 excitation spectrum REX being in the ultraviolet region, in the visible region and/or in the infrared region of the electromagnetic spectrum. Furthermore, after excitation, the radiating element 3 is configured to emit electromagnetic radiation constituting a radiating element 3 emission spectrum REM being in the ultraviolet region, in the visible region and/or in the infrared region of the electromagnetic spectrum. Additionally, and as has also been mentioned, the blocking element 2 is configured to block, for example to absorb, reflect and/ or scatter impinging electromagnetic radiation constituting a blocking element spectrum RB.
  • the blocking element 2 prevents, depending on its absorbing, scattering or reflecting properties, either an excitation of the radiating element 3 by preventing incoming electromagnetic radiation from impinging on the radiating element 3, or a transmission of the electromagnetic radiation being emitted from the excited radiating element 3 towards an outside.
  • This blocking effect exhibited by the blocking element 2 is removed upon processing of the data carrier 1, in particular upon processing of the blocking element 2.
  • FIG 5b the processing of a data carrier 1 is depicted.
  • the processing of the data carrier 1 corresponds to the irradiation by electromagnetic radiation R in order to generate unblocking regions 4 in the blocking element 2 in the regions of impingement of the irradiated electromagnetic radiation R.
  • the unblocking region 4 corresponds to a recess or a transparent or a translucent region that is formed within the blocking element 2.
  • Regions 5 of the radiating element 3 which are arranged after the unblocking regions of the blocking element 2 with respect to the extension direction E are thereby uncovered.
  • the unblocking regions 4 of the blocking element 2 reveal below-lying regions 5 of the radiating element 3.
  • a security element 7 can be formed.
  • Both data carriers 1 are depicted in figures 5c and 5d .
  • Both data carriers 1 in each case comprise a cover layer 8, a base layer 9, a blocking element 2 with an unblocking region 4, and a radiating element 3 with an uncovered region 5.
  • the cover layer 8 corresponds to a transparent layer which does not interact with impinging electromagnetic radiation.
  • the base layer 9 in turn corresponds to an opaque layer.
  • the uncovered region 5 of the radiating element 3 is uncovered by the unblocking region 4 of the blocking element 2.
  • the blocking element 2 and the radiating element 3 of the data carrier 1 in figure 5c are configured such, that a blocking element spectrum RB that comprises electromagnetic radiation being blocked by the blocking element 2, and a radiating element emission spectrum REM that comprises electromagnetic radiation being emitted by the radiating element 3 upon its relaxation are essentially the same.
  • the blocking element 2 blocks the emission radiation being radiated by the radiating element 3 towards an outside of the data carrier 1 everywhere except in the unblocking regions 4.
  • the radiating element emission spectrum REM will radiate only through the unblocking regions 4 of the blocking element 2 and will be detectable outside of the data carrier 1.
  • a security element 7 being constituted by the unblocking regions 4 of the blocking element 2 and the below-lying uncovered regions 5 of the radiating element 3 is generated, which security element 7 appears with the corresponding fluorescence properties, i.e. with the radiating element emission spectrum REM.
  • the radiating element 3 could correspond to a fluorescent ink which is excited upon absorbing ultraviolet light and which emits visible red light upon its relaxation.
  • the blocking element 2 could correspond to a cyan colored layer which absorbs visible red light.
  • the radiating element 3 and the blocking element 2 are in each case provided as layers which extend entirely along a width W of the data carrier 1 with respect to a transverse direction T running perpendicularly to the extension direction E.
  • a radiating element 3 and/or a blocking element 2 extending only partially along the transverse direction T or having the form of a pixelated pattern are likewise conceivable.
  • the data carrier 1 can comprise two or more radiating elements 3, 3', two or more blocking elements 2, 2', and two or more layers constituting the layer structure of the data carrier 1.
  • the data carrier 1 depicted in figure 6 comprises the transparent cover layer 8, the base layer 9, a blocking element 2 and a radiating element 3 as just described. However, it additionally comprises intermediate layers 6 which are transparent and which are arranged before and after the radiating element 3 with respect to the extension direction E.
  • a laserable layer 10 is arranged before the opaque base layer 9 layer with respect to the extension direction E.
  • the laserable layer 10 is here a layer reactive to a laser radiation R' different from the impinging electromagnetic radiation R used to generate the unblocking region 4.
  • the laserable layer in this example is composed of a conventional material such as those supplied for personalization by near-infrared laser sources, for example an Nd:YAG laser, with generating grey or black marking.
  • the laserable layer 10 is mostly non-absorbing or transparent in the near-UV and visible wavelength regions used for generating the security element according to the present invention such as in the data carrier example in figure 5c .
  • black marks 11 are generated in the regions of impingement.
  • transparent intermediate layers 6 several imprints 12 are provided between the transparent intermediate layers 6 several imprints 12 are provided.
  • transparent layers 6 with imprints 12 and another laserable layer 10 are also provided on a backside of the data carrier 1, namely after the base layer 9 with respect to the extension direction E. That is to say, the data carrier 1 according to the invention can comprise conventional security elements known in the art such as imprints 12 or black markings 11 in addition to the security elements 7 according to the invention.
  • FIG. 7a depicts a security document 13 in the form of an identity card which comprises personalized data in the form of the name and signature of the card holder. These personalized data is made here by conventional black laser marking 11 in a laserable layer as just described.
  • the security document 13 further comprises a data carrier 1 according to the invention, which is provided within a rectangular area of the security document 13.
  • the data carrier 1 comprises a blocking element 2 of e.g. blue color, such as a photobleachable blue colorant, below which a fluorescent radiating element 3 is arranged.
  • the radiating element 3 can be excited upon irradiation by ultraviolet light, whereupon it emits visible red light.
  • the data carrier 1 depicted in figure 7a has not been personalized, i.e. no security element according to the invention has been generated.
  • the blue colored blocking element 2 present in the corresponding rectangular area will be visible for an observer. Illumination with a UV light constituting the radiating element emission spectrum REX will not reveal detectable fluorescence.
  • Figures 7b and 7c depict the data carrier 1 after it has been personalized, i.e. after a security element 7 has been generated.
  • Said security element 7 in this case corresponds to the expiration date "29/01/2025" which has been generated by selectively generating unblocking regions 4, 4' within the blocking element 2, in this example via photo-induced discoloration or destruction of the blue colorant.
  • figure 7b depicts the security document 13 being viewed under ambient light. Since the radiating element 3 is not excited upon an illumination with ambient light it will not fluoresce. Instead, it will appear as an "off-white" element between the remaining parts of the blocking element 2. However, if the data carrier 1 is illuminated with ultraviolet light as depicted in Figure 7c , the radiating element 3 is excited and emits a red colored radiating element emission spectrum REM upon its relaxation. Since the blocking element 2 is configured to block such electromagnetic radiation, the emission of the radiating element 3 is only visible in the regions of the unblocking regions 4, 4' of the blocking element 2. Since said unblocking regions 4, 4' constitute the expiration date "29/01/2025", said date appears in red color REM.
  • the data carriers 1 can comprise, inter alia, two or more radiating elements 3, 3' and/or two or more blocking elements 2, 2'.
  • a data carrier 1 comprising a transparent cover layer 8, a transparent base layer 9, a radiating element 3 and a further radiating element 3' that are arranged between a blocking element 2 and a further blocking element 2'.
  • Further layers such as transparent intermediate layers 6 can be present in the data carrier 1, as well.
  • the radiating element 3 and the further radiating element 3' are combined within the same layer and are arranged on a same height with respect to the extension direction E, e.g. by mixing two different fluorescent inks.
  • Said inks could correspond to a double-emitting fluorescent print, with a first radiating element excitation spectrum REX being in the near-ultraviolet region of the electromagnetic spectrum, a first radiating element emission spectrum REM being in the visible region of the electromagnetic spectrum, a further radiating element excitation spectrum REX' being in the visible region of the electromagnetic spectrum, and a further radiating element emission spectrum REM' being in the near-infrared region of the electromagnetic spectrum.
  • FIG. 9a depicts a front view
  • 9b depicts a back view of said data carrier 1. Because both, the cover layer 8 and the base layer 9 are provided as transparent layers, the first blocking element 2 is visible or detectable through the cover layer 8 in the front view ( figure 9a ) and the further blocking element 2' is visible or detectable through the base layer 9 in the back view ( figure 9b ).
  • the first blocking element 2 corresponds here to a layer that is configured to absorb electromagnetic radiation being in the ultraviolet region of the electromagnetic spectrum and the further blocking element 2' corresponds here to a layer that is configured to absorb electromagnetic radiation being in the infrared region of the electromagnetic radiation.
  • Figures 9a and 9b depict the data carrier 1 in an unprocessed state, i.e. before the generation of one or more unblocking regions in the blocking elements 2, 2'. In figures 9c to 9f the data carrier 1 has been personalized.
  • a first security element 7 in the form of an image of the holder has been generated by means of corresponding unblocking regions 4 in the first blocking element 2 and a second security element 7' in the form of a birth date of the holder has been generated by means of corresponding unblocking regions 4' in the second blocking element 2'.
  • Figure 9c depicts a front view onto the data carrier 1 being viewed under ultraviolet light.
  • the first security element 7 in the form of the image of the holder is visible as emitted light of a radiating element emission spectrum REM being in the visible range of the electromagnetic spectrum.
  • said first security element is not visible, see figure 9d .
  • the whole window is either uniformly fluorescent or uniformly non-fluorescent, depending on whether the further blocking element 2' in the form of an infrared filter also blocks ultraviolet light.
  • Figure 9e again depicts the front side of the data carrier 1, which is exposed to ambient light overlapping with the further radiating element excitation spectrum REX' and is photographed using a NIR detection equipment, such as a forensic NIR viewer or a photo camera with an IR filter. Supposing that the first blocking element 2 does not block infrared radiation but only ultraviolet radiation, the entire data carrier 1 will be detected as uniformly emitting luminescent infrared radiation.
  • the further blocking element 2' will block any infrared radiation that is emitted from the further radiating element 3' except in regions of the unblocking regions 4'.
  • the second security element 7' in the form of the birth date will emit detectable radiation corresponding to the radiating element emission spectrum REM'.

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Electromagnetism (AREA)
  • General Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Optics & Photonics (AREA)
  • Credit Cards Or The Like (AREA)
EP19306768.3A 2019-12-24 2019-12-24 Élément de sécurité luminescente personnalisable Withdrawn EP3842254A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP19306768.3A EP3842254A1 (fr) 2019-12-24 2019-12-24 Élément de sécurité luminescente personnalisable
EP20821014.6A EP4081406A1 (fr) 2019-12-24 2020-12-11 Élément de sécurité luminescent personnalisable
PCT/EP2020/085842 WO2021130035A1 (fr) 2019-12-24 2020-12-11 Élément de sécurité luminescent personnalisable

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP19306768.3A EP3842254A1 (fr) 2019-12-24 2019-12-24 Élément de sécurité luminescente personnalisable

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EP20821014.6A Pending EP4081406A1 (fr) 2019-12-24 2020-12-11 Élément de sécurité luminescent personnalisable

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3134323A1 (fr) * 2022-04-07 2023-10-13 Idemia France procédé de fabrication d’un dispositif composé d’au moins deux matériaux de composition différente et dispositif correspondant.

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Publication number Priority date Publication date Assignee Title
US20050098636A1 (en) 2000-09-29 2005-05-12 Mattias Schumacher Method and device for personalising lumonescent marks of authenticity
WO2014111405A1 (fr) * 2013-01-21 2014-07-24 Bundesdruckerei Gmbh Produit de valeur ou de sécurité et procédé de fabrication d'une caractéristique de sécurité sur ou dans le produit de valeur ou de sécurité
EP2424735B1 (fr) 2009-04-30 2014-12-31 Gemalto SA Procédé de sécurisation d'un document d'identification et document d'identification sécurisé
WO2016096285A1 (fr) * 2014-12-18 2016-06-23 Gemalto Sa Personnalisation de support physique par dissimulation et affichage sélectifs de pixels de couleur pré-imprimés
WO2017005633A1 (fr) * 2015-07-03 2017-01-12 Bundesdruckerei Gmbh Document de sécurité ou de valeur présentant un élément luminescent et procédé pour vérifier l'authenticité de ce document de sécurité ou de valeur
WO2019081984A2 (fr) * 2017-10-27 2019-05-02 Assa Abloy Ab Élément de sécurité
EP3578380A1 (fr) * 2018-06-05 2019-12-11 Giesecke+Devrient Currency Technology GmbH Élément de sécurité à caractéristique magnétique

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050098636A1 (en) 2000-09-29 2005-05-12 Mattias Schumacher Method and device for personalising lumonescent marks of authenticity
EP2424735B1 (fr) 2009-04-30 2014-12-31 Gemalto SA Procédé de sécurisation d'un document d'identification et document d'identification sécurisé
WO2014111405A1 (fr) * 2013-01-21 2014-07-24 Bundesdruckerei Gmbh Produit de valeur ou de sécurité et procédé de fabrication d'une caractéristique de sécurité sur ou dans le produit de valeur ou de sécurité
WO2016096285A1 (fr) * 2014-12-18 2016-06-23 Gemalto Sa Personnalisation de support physique par dissimulation et affichage sélectifs de pixels de couleur pré-imprimés
WO2017005633A1 (fr) * 2015-07-03 2017-01-12 Bundesdruckerei Gmbh Document de sécurité ou de valeur présentant un élément luminescent et procédé pour vérifier l'authenticité de ce document de sécurité ou de valeur
WO2019081984A2 (fr) * 2017-10-27 2019-05-02 Assa Abloy Ab Élément de sécurité
EP3578380A1 (fr) * 2018-06-05 2019-12-11 Giesecke+Devrient Currency Technology GmbH Élément de sécurité à caractéristique magnétique

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3134323A1 (fr) * 2022-04-07 2023-10-13 Idemia France procédé de fabrication d’un dispositif composé d’au moins deux matériaux de composition différente et dispositif correspondant.

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