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EP1322478A1 - Method and device for personalising luminescent marks of authenticity - Google Patents

Method and device for personalising luminescent marks of authenticity

Info

Publication number
EP1322478A1
EP1322478A1 EP01969560A EP01969560A EP1322478A1 EP 1322478 A1 EP1322478 A1 EP 1322478A1 EP 01969560 A EP01969560 A EP 01969560A EP 01969560 A EP01969560 A EP 01969560A EP 1322478 A1 EP1322478 A1 EP 1322478A1
Authority
EP
European Patent Office
Prior art keywords
authenticity feature
authenticity
feature
light
lighting
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.)
Granted
Application number
EP01969560A
Other languages
German (de)
French (fr)
Other versions
EP1322478B1 (en
Inventor
Matthias Schumacher
Dirk Fischer
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.)
Unica Technology AG
Original Assignee
Orga Kartensysteme 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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=7658451&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP1322478(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Orga Kartensysteme GmbH filed Critical Orga Kartensysteme GmbH
Publication of EP1322478A1 publication Critical patent/EP1322478A1/en
Application granted granted Critical
Publication of EP1322478B1 publication Critical patent/EP1322478B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M5/00—Duplicating or marking methods; Sheet materials for use therein
    • B41M5/26—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used
    • B41M5/28—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used using thermochromic compounds or layers containing liquid crystals, microcapsules, bleachable dyes or heat- decomposable compounds, e.g. gas- liberating
    • B41M5/286—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used using thermochromic compounds or layers containing liquid crystals, microcapsules, bleachable dyes or heat- decomposable compounds, e.g. gas- liberating using compounds undergoing unimolecular fragmentation to obtain colour shift, e.g. bleachable dyes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M3/00—Printing processes to produce particular kinds of printed work, e.g. patterns
    • B41M3/14—Security printing
    • B41M3/144—Security printing using fluorescent, luminescent or iridescent effects
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M5/00—Duplicating or marking methods; Sheet materials for use therein
    • B41M5/26—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used
    • B41M5/267—Marking of plastic artifacts, e.g. with laser

Definitions

  • UV inks are also used in security features. These “UV inks” are only visible when they are excited to fluorescence or phosphorescence with UV light. They are available in printing inks or in fibers and are processed using various printing processes or paper or plastic are added directly to the substrates.
  • UV inks are used in security technology, which are only visible under UV light due to fluorescence or phosphorescence, but that security features developed from them cannot be personalized.
  • a method should therefore be proposed with which laser marking on luminescent substances is possible, which is not visible under normal conditions, but is visible with the aid of a UV light source or another suitable excitation.
  • the object of the invention is therefore to provide a method for laser marking luminescent authenticity features or markings, in which the marking generated is not visible in the normal state, but with the aid of a UV lamp or by means of an excitation in the electromagnetic field as a negative luminescence image (fluorescence image or phosphorescence image) is visible.
  • the object is achieved by a process which provides for bleaching the active luminescent pigments or dyes with the aid of a laser or another suitable energy beam.
  • the invention thus sets a laser personalization of UV security features such. B. in plastic cards ahead and combines the advantages of two methods, namely personalization using a laser beam and also the personalization of luminescent substances and their verification under UV light or another high-energy excitation medium.
  • the invention generally claims the personalization of luminescent authenticity markings of any kind on any data carrier. Furthermore, the personalization of chemo- and / or bioluminescent substances is generally claimed to be essential to the invention.
  • the generic term “luminescence” is therefore used in the following description as a synonym for all three lighting phenomena.
  • a multi-layer plastic card (eg in the form of a check card) is described as the data carrier.
  • the invention is not limited to this.
  • the structure of a check card is used below for the further description of the invention.
  • the marking can therefore be printed as a printing ink on a specific or even several layers of the data carrier or applied in some other way.
  • the marking can also be integrated into the plastic polymer of one or more layers of the data carrier.
  • the luminescent substance can also be incorporated into the adhesive, the lacquer or as an additive in the plastic material.
  • UV color is generally understood to mean a marking, substance or authenticity feature which, using a photo and / or chemo- and / or bio-luminescence when absorbing an energy-rich light (usually ultraviolet light), is a light phenomenon caused. It is preferred in the context of the invention that the lighting effect takes place in visible light.
  • the invention is not limited to this.
  • this light phenomenon can therefore also take place in the invisible spectral range and can be evaluated by machine.
  • the invention is also not limited to excitation with UV light; It is therefore also possible to provide an excitation in a corresponding electromagnetic field which is suitable for causing the substance to light up (visible or invisible).
  • the different interactions between laser light and matter include the bleaching of color-active substances. According to the invention, it is possible here to destroy these color-active substances with the aid of a laser beam. For example, the body color of a substrate containing pigments changes from colored to white.
  • the color-active substance absorbs the laser light and undergoes a chemical reaction in which it loses its color properties.
  • the color-active substance is chemically broken down.
  • the laser light should not stimulate any side reactions that lead to discolouration of the substrate and therefore do not cause bleaching to white.
  • UV inks contain pigments or dyes which normally do not appear colored or are only weakly colored, but are stimulated to emit visible light by UV absorption or other electromagnetic excitation.
  • the phenomenon is generally referred to as "cold glow” or luminescence.
  • fluorescence and phosphorescence Depending on the lifespan of the excited states, a distinction is made between fluorescence and phosphorescence, with the emission occurring very quickly in the first case and afterglow also being observed after the UV excitation in the second case.
  • UV inks is used frequently, but is misleading in that most of the so-called substances are not colored. In addition, the term “UV inks” is used inaccurately for UV-curing printing inks. The term UV does not refer to luminescent effects, but to the mechanism of chemical hardening during processing.
  • UV inks the color-active substance is destroyed by intensive laser light, analogously to the absorption inks.
  • the substrate should not be damaged in the visible range or its color impression changed.
  • a selective (UV) wavelength range must therefore be used (Band, in the non-visible range) and the intensity must be dosed so that the UV color itself is excited by the absorption and then disintegrates, which corresponds to bleaching, in this way the bleaching would be done with visible pigments ,
  • UV inks are not or only weakly colored under normal conditions, they hardly absorb any visible light. For this reason, ultraviolet light must be used for bleaching. In this case, a laser wavelength range should preferably be selected, which is particularly different from the "UV ink” used is well absorbed.
  • UV inks that are suitable for bleaching by UV laser radiation belong to the following classes of substances, for example:
  • Tin sulfide derivatives benzoxazinone derivatives
  • infrared radiation and / or radiation of other wavelengths can also be used for bleaching the “UV colors” if the color-active substances in the corresponding spectral range absorb the radiation used in each case without the color-active substances becoming visibly discolored.
  • the substrate to be marked has a uniform luminescence. This is achieved by evenly applying "UV printing inks” or by incorporating the "UV inks” into a polymer matrix.
  • the substrate can then be marked with the aid of the laser by completely bleaching the “UV color” locally. In this way, for example, vector fonts or raster scanning images can be generated.
  • partially bleaching by modulating the laser power achieve and thus generate grayscale images.
  • images printed with “UV inks” or other security features that contain “UV inks” can also be subsequently marked.
  • FIG. 2 section through the card structure according to FIG. 1 with the action of a laser beam
  • FIG. 3 shows a schematic plan view of the structure according to FIG. 2;
  • FIG. 1 an excerpt from a map structure is shown in section on an unscaled scale.
  • a luminescent authenticity feature 3 is arranged on a carrier film 2.
  • the structure 4 When illuminated with, for example, UV light 5, the structure 4 is excited in such a way that, for example, lighting occurs in visible light 6.
  • this authenticity feature 3 is now to be personalized.
  • a laser beam 7 (see FIGS. 2 and 3) is used, for example Lettering 8 inscribed in the structure 4 of the authenticity feature 3.
  • the intensity of the laser beam is selected so that the structure 4 is transferred to the structure 4 'only in the area of the action of the laser beam.
  • the structure 4 ' should not have any structure or color change which can be seen in visible light.
  • the luminescence is chosen by choosing the intensity of the laser beam 7 so that there is only an impairment of the luminescence, but not an extinction, a halftone or grayscale image can be seen as the lettering 8 even when irradiated with a UV lamp 10 ,

Landscapes

  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Credit Cards Or The Like (AREA)
  • Printing Methods (AREA)
  • Preliminary Treatment Of Fibers (AREA)
  • Telephone Function (AREA)

Abstract

A method and device for personalizing the luminescent authenticity features on data carrier, in particular plastic cards. The luminescent authenticity feature being 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.

Description

Verfahren und Vorrichtung zur Personalisierunq von lumineszierenden Echtheitsmerkmalen Method and device for personalizing luminescent authenticity features
Nach dem Stand der Technik ist es möglich, schwarze Markierungen mit Laserbeschriftungssystemen zu erzeugen. Dies findet Anwendung in der Laser- Personalisierung, die als wirtschaftliches Verfahren mit hoher Qualität in vielen Bereichen eingesetzt wird und häufig auch ein Sicherheitsmerkmal darstellt.According to the prior art, it is possible to create black markings using laser marking systems. This is used in laser personalization, which is used as an economical process with high quality in many areas and often also represents a security feature.
Weiterhin finden sogenannte „UV-Farben" in Sicherheitsmerkmalen Verwendung. Diese „UV-Farben" sind erst sichtbar, wenn sie mit UV-Licht zur Fluoreszenz oder Phosphoreszenz angeregt werden. Sie liegen in- Druckfarben oder in Fasern vor und werden nach verschiedenen Druckverfahren verarbeitet oder den Substraten Papier oder Kunststoff direkt zugesetzt.So-called “UV inks” are also used in security features. These “UV inks” are only visible when they are excited to fluorescence or phosphorescence with UV light. They are available in printing inks or in fibers and are processed using various printing processes or paper or plastic are added directly to the substrates.
Ein Problem ergibt sich daraus, daß in der Sicherheitstechnik die sogenannten „UV-Farben" zum Einsatz kommen, welche aufgrund von Fluoreszenz oder Phosphoreszenz nur unter UV-Licht sichtbar sind, daß aber daraus entwickelte Sicherheitsmerkmale nicht personalisierbar sind. Vielmehr liegen diese Merkmale z. B. in Fall von Wertpapieren oder Kunststoffkarten als Druck oder als Zusatz (Fasern) im Papier oder Kunststoff vor.A problem arises from the fact that so-called “UV inks” are used in security technology, which are only visible under UV light due to fluorescence or phosphorescence, but that security features developed from them cannot be personalized. B. in the case of securities or plastic cards as a print or as an additive (fibers) in paper or plastic.
Es soll daher ein Verfahren vorgeschlagen werden, mit dem eine Lasermarkierung auf lumineszierenden Stoffen möglich ist, die unter Normalbedingungen nicht, wohl aber mit Hilfe einer UV-Lichtquelle oder einer anderen, geeigneten Anregung sichtbar ist.A method should therefore be proposed with which laser marking on luminescent substances is possible, which is not visible under normal conditions, but is visible with the aid of a UV light source or another suitable excitation.
Die Erfindung hat deshalb die Aufgabe, ein Verfahren zur Lasermarkierung von lumineszierenden Echtheitsmerkmalen oder Markierungen vorzusehen, bei dem die erzeugte Markierung im Normalzustand nicht sichtbar ist, aber mit Hilfe einer UV-Lampe oder über eine Anregung im elektromagnetischen Feld als negatives Lumineszenz-Bild (Fluoreszenzbild oder Phosphoreszenzbild) sichtbar wird. Die Aufgabe wird durch ein Verfahren gelöst, das ein Bleichen der aktiven Lumineszenzpigmente oder -farbstoffe mit Hilfe eines Lasers oder einem anderen, geeigneten Energiestrahl vorsieht.The object of the invention is therefore to provide a method for laser marking luminescent authenticity features or markings, in which the marking generated is not visible in the normal state, but with the aid of a UV lamp or by means of an excitation in the electromagnetic field as a negative luminescence image (fluorescence image or phosphorescence image) is visible. The object is achieved by a process which provides for bleaching the active luminescent pigments or dyes with the aid of a laser or another suitable energy beam.
Die Erfindung setzt also eine Laser-Personalisierung von UV- Sicherheitsmerkmalen z. B. in Kunststoffkarten voraus und verknüpft die Vorteile von zwei Verfahren, nämlich eine Personalisierung mittels Laserstrahl und darüber hinaus die Personalisierung von Lumineszenz-Stoffen und deren Verifizierung unter UV-Licht oder einem anderen energiereichen Anregungsmedium.The invention thus sets a laser personalization of UV security features such. B. in plastic cards ahead and combines the advantages of two methods, namely personalization using a laser beam and also the personalization of luminescent substances and their verification under UV light or another high-energy excitation medium.
Die Erfindung beansprucht allgemein die Personalisierung von lumineszierenden Echtheitsmarkierungen, gleich welcher Art, auf beliebigen Datenträgern. Ferner wird allgemein auch die Personalisierung von chemo- und/oder biolumineszierenden Stoffen als erfindungswesentlich beansprucht. Es wird daher in der folgenden Beschreibung der Oberbegriff „Lumineszenz,, als Synonym für alle drei Leuchterscheinungen verwendet.The invention generally claims the personalization of luminescent authenticity markings of any kind on any data carrier. Furthermore, the personalization of chemo- and / or bioluminescent substances is generally claimed to be essential to the invention. The generic term “luminescence” is therefore used in the following description as a synonym for all three lighting phenomena.
Als Datenträger wird in einer bevorzugten Ausführungsform nach der Erfindung eine mehrschichtige Kunststoffkarte (z. B. in der Form einer Scheckkarte) beschrieben. Die Erfindung ist hierauf jedoch nicht beschränkt. Lediglich aus Vereinfachungsgründen wird im folgenden der Aufbau einer Scheckkarte für die weitere Beschreibung der Erfindung heran gezogen.In a preferred embodiment according to the invention, a multi-layer plastic card (eg in the form of a check card) is described as the data carrier. However, the invention is not limited to this. For the sake of simplicity only, the structure of a check card is used below for the further description of the invention.
Ebenso werden alle möglichen Einbindungen und Einbauorte der lumineszierenden Markierung in einem Datenträger beansprucht. Die Markierung kann daher als Druckfarbe auf eine bestimmte oder auch mehrere Lagen des Datenträgers aufgedruckt oder in anderen Weise aufgebracht sein. Die Markierung kann aber auch in das Kunststoff-Polymer einer oder mehreren Schichten des Datenträgers eingebunden sein. Die lumineszierende Substanz kann auch in den Kleber, den Lack oder als Additiv in das Kunststoffmaterial eingebunden sein. Zur weiteren Vereinfachung wird unter dem Begriff „UV-Farbe„ allgemein eine Markierung, Substanz oder Echtheitsmerkmal verstanden, die unter Ausnutzung einer Photo- und/oder Chemo- und/oder Bio-Lumineszenz bei Absorption eines energiereichen Lichtes (meist ultraviolettes Licht) eine Leuchterscheinung verursacht. Es wird zwar im Rahmen der Erfindung bevorzugt, daß die Leuchterscheinung im sichtbaren Licht erfolgt. Die Erfindung ist hierauf jedoch nicht beschränkt. Für eine maschinelle Echtheitserkennung von Scheckkarten kann deshalb diese Leuchterscheinung auch im nicht-sichtbaren Spektralbereich erfolgen und maschinell ausgewertet werden. Ebenso ist die Erfindung auch nicht auf die Anregung mit UV-Licht beschränkt; es kann daher auch eine Anregung in einem entsprechenden elektromagnetischen Feld vorgesehen werden, welches geeignet ist, die Substanz zum (sichtbaren oder nicht-sichtbaren) Aufleuchten zu bringen.Likewise, all possible integrations and installation locations of the luminescent marking in a data carrier are claimed. The marking can therefore be printed as a printing ink on a specific or even several layers of the data carrier or applied in some other way. However, the marking can also be integrated into the plastic polymer of one or more layers of the data carrier. The luminescent substance can also be incorporated into the adhesive, the lacquer or as an additive in the plastic material. For further simplification, the term “UV color” is generally understood to mean a marking, substance or authenticity feature which, using a photo and / or chemo- and / or bio-luminescence when absorbing an energy-rich light (usually ultraviolet light), is a light phenomenon caused. It is preferred in the context of the invention that the lighting effect takes place in visible light. However, the invention is not limited to this. For machine authenticity detection of credit cards, this light phenomenon can therefore also take place in the invisible spectral range and can be evaluated by machine. The invention is also not limited to excitation with UV light; It is therefore also possible to provide an excitation in a corresponding electromagnetic field which is suitable for causing the substance to light up (visible or invisible).
Zu den verschiedenen Wechselwirkungen zwischen Laserlicht und Materie gehört das Bleichen von farbaktiven Substanzen. Hierbei besteht erfindungsgemäß die Möglichkeit mit Hilfe eines Laserstrahls diese farbaktiven Substanzen zu zerstören. Beispielsweise wechselt die Körperfarbe eines Pigmente enthaltenden Substrates von farbig nach weiß.The different interactions between laser light and matter include the bleaching of color-active substances. According to the invention, it is possible here to destroy these color-active substances with the aid of a laser beam. For example, the body color of a substrate containing pigments changes from colored to white.
Dieser Vorgang wird im Rahmen der vorliegenden Erfindung angewendet.This process is used in the context of the present invention.
Grundvoraussetzung für diesen Prozeß ist, daß die farbaktive Substanz das Laserlicht absorbiert und eine chemische Reaktion eingeht, bei der sie ihre Farbeigenschaften verliert. Im einfachsten Fall erfolgt ein chemischer Abbau der farbaktiven Substanz. Zudem sollte das Laserlicht keine Nebenreaktionen anregen, die zu einer Verfärbung des Substrats führen, und damit kein Bleichen nach weiß bewirken.The basic prerequisite for this process is that the color-active substance absorbs the laser light and undergoes a chemical reaction in which it loses its color properties. In the simplest case, the color-active substance is chemically broken down. In addition, the laser light should not stimulate any side reactions that lead to discolouration of the substrate and therefore do not cause bleaching to white.
Das Prinzip des Bleichens mit Laserlicht läßt sich nun erfindungsgemäß auch auf sogenannte „UV-Farben" übertragen. Diese „UV-Farben" enthalten Pigmente oder Farbstoffe, welche im Normalfall nicht farbig erscheinen oder nur schwach gefärbt sind, durch UV-Absorption oder andere elektromagnetische Anregung aber zur Emission von sichtbarem Licht angeregt werden.The principle of bleaching with laser light can now also be applied according to the invention to so-called "UV inks". These "UV inks" contain pigments or dyes which normally do not appear colored or are only weakly colored, but are stimulated to emit visible light by UV absorption or other electromagnetic excitation.
Das Phänomen wird allgemein als „kaltes Leuchten" oder Lumineszenz bezeichnet. Je nach Lebensdauer der angeregten Zustände unterscheidet man Fluoreszenz und Phosphoreszenz, wobei im ersten Fall die Emission sehr schnell erfolgt, im zweiten Fall ein Nachleuchten auch nach der UV-Anregung zu beobachten ist.The phenomenon is generally referred to as "cold glow" or luminescence. Depending on the lifespan of the excited states, a distinction is made between fluorescence and phosphorescence, with the emission occurring very quickly in the first case and afterglow also being observed after the UV excitation in the second case.
Der Begriff „UV-Farben" wird häufig verwendet, ist aber insofern irreführend, als die meisten so genannten Stoffe nicht farbig sind. Zudem wird der Begriff „UV- Farben" in ungenauer Weise für UV-härtende Druckfarben verwendet. Hierbei bezieht sich der Begriff UV nicht auf Lumineszenzeffekte, sondern auf den Mechanismus der chemischen Härtung bei der Verarbeitung.The term "UV inks" is used frequently, but is misleading in that most of the so-called substances are not colored. In addition, the term "UV inks" is used inaccurately for UV-curing printing inks. The term UV does not refer to luminescent effects, but to the mechanism of chemical hardening during processing.
Beim erfindungsgemäßen Bleichen von „UV-Farben" erfolgt analog zu den Absorptionsfarben eine Zerstörung der farbaktiven Substanz durch intensives Laserlicht. Hierbei soll das Substrat jedoch nicht im sichtbaren Bereich beschädigt oder in ihrem Farbeindruck verändert werden. Es muß daher ein selektiver (UV)-Wellenlängenbereich (Band, im nicht-sichtbaren Bereich) gewählt werden und die Intensität muß so dosiert werden, daß die UV-Farbe selbst durch die Absorption angeregt wird und dann zerfällt, was einem Bleichen entspricht. Auf diese Weise würde man das Bleichen mit sichtbaren Pigmenten machen.In the bleaching of “UV inks” according to the invention, the color-active substance is destroyed by intensive laser light, analogously to the absorption inks. However, the substrate should not be damaged in the visible range or its color impression changed. A selective (UV) wavelength range must therefore be used (Band, in the non-visible range) and the intensity must be dosed so that the UV color itself is excited by the absorption and then disintegrates, which corresponds to bleaching, in this way the bleaching would be done with visible pigments ,
Da „UV-Farben" unter Normalbedingungen nicht oder nur schwach farbig sind, absorbieren sie kaum sichtbares Licht. Daher muß zum Bleichen ultraviolettes Licht eingesetzt werden. Hierbei ist vorzugsweise ein Laser- Wellenlängenbereich zu wählen, der von der eingesetzten „UV-Farbe" besonders gut absorbiert wird. „UV-Farben", die sich zum Bleichen durch UV-Laserstrahlung eignen, gehören zum Beispiel zu folgenden Stoffklassen:Since "UV inks" are not or only weakly colored under normal conditions, they hardly absorb any visible light. For this reason, ultraviolet light must be used for bleaching. In this case, a laser wavelength range should preferably be selected, which is particularly different from the "UV ink" used is well absorbed. "UV inks" that are suitable for bleaching by UV laser radiation belong to the following classes of substances, for example:
Zinnsulfidderivate, Benzoxazinonderivate,Tin sulfide derivatives, benzoxazinone derivatives,
Pyrazolinderivatepyrazoline
Zum Bleichen der„UV-Farben" kann neben ultravioletter auch infrarote Strahlung und/oder Strahlung anderer Wellenlängen verwendet werden, wenn die farbaktiven Stoffe in dem entsprechenden Spektralbereich die jeweilig verwendete Strahlung absorbieren, ohne daß es zu einer sichtbaren Verfärbung der farbaktiven Stoffe kommt.In addition to ultraviolet, infrared radiation and / or radiation of other wavelengths can also be used for bleaching the “UV colors” if the color-active substances in the corresponding spectral range absorb the radiation used in each case without the color-active substances becoming visibly discolored.
In einer einfachen Ausführungsform der Erfindung weist das zu markierende Substrat eine gleichmäßige Lumineszenz auf. Dies wird durch einen gleichmäßigen Auftrag von„UV-Druckfarben" oder durch die Einarbeitung der„UV-Farben" in eine polymere Matrix erreicht. Das Substrat kann dann mit Hilfe des Lasers markiert werden, indem die„UV-Farbe" lokal vollständig gebleicht wird. Hierdurch lassen sich zum Beispiel Vektorschriften oder Raster- Scanning Bilder erzeugen. Weiterhin besteht die Möglichkeit, durch eine Modulation der Laserleistung ein teilweises Bleichen zu erreichen und somit Graustufenbilder zu generieren.In a simple embodiment of the invention, the substrate to be marked has a uniform luminescence. This is achieved by evenly applying "UV printing inks" or by incorporating the "UV inks" into a polymer matrix. The substrate can then be marked with the aid of the laser by completely bleaching the “UV color” locally. In this way, for example, vector fonts or raster scanning images can be generated. Furthermore, there is the possibility of partially bleaching by modulating the laser power achieve and thus generate grayscale images.
In einer weitergehenden Ausführung der Erfindung können auch mit„UV- Farben" gedruckte Bilder oder andere Sicherheitsmerkmale, die„UV-Farben" enthalten, nachträglich markiert werden.In a further embodiment of the invention, images printed with “UV inks” or other security features that contain “UV inks” can also be subsequently marked.
Der Erfindungsgegenstand der vorliegenden Erfindung ergibt sich nicht nur aus dem Gegenstand der einzelnen Patentansprüche, sondern auch aus der Kombination der einzelnen Patentansprüche untereinander.The subject matter of the present invention results not only from the subject matter of the individual patent claims, but also from the combination of the individual patent claims with one another.
Alle in den Unterlagen, einschließlich der Zusammenfassung, offenbarten Angaben und Merkmale, insbesondere die in den Zeichnungen dargestellte räumliche Ausbildung werden als erfindungswesentlich beansprucht, soweit sie einzeln oder in Kombination gegenüber dem Stand der Technik neu sind.All disclosed in the documentation, including the summary Information and features, in particular the spatial design shown in the drawings, are claimed as essential to the invention, insofar as they are new compared to the prior art, individually or in combination.
Im folgenden wird die Erfindung anhand von lediglich einen Ausführungsweg darstellenden Zeichnungen näher erläutert. Hierbei gehen aus den Zeichnungen und ihrer Beschreibung weitere erfindungswesentliche Merkmale und Vorteile der Erfindung hervor.The invention is explained in more detail below with the aid of drawings which illustrate only one embodiment. Here, from the drawings and their description, further features and advantages of the invention that are essential to the invention emerge.
Es zeigen:Show it:
Fig. 1 : Schnitt durch einen vereinfacht dargestellten Kartenaufbau im Ausgangszustand des Verfahrens;1: Section through a card structure shown in simplified form in the initial state of the method;
Fig. 2 : Schnitt durch den Kartenaufbau nach Fig. 1 mit Einwirkung eines Laserstrahls;FIG. 2: section through the card structure according to FIG. 1 with the action of a laser beam;
Fig. 3 : schematisiert eine Draufsicht auf den Aufbau nach Figur 2;3: shows a schematic plan view of the structure according to FIG. 2;
Fig. 4 : den Kartenaufbau nach Fig. 2 und 3 bei Anregung mit energiereichem Licht;4: the card structure according to FIGS. 2 and 3 when excited with high-energy light;
Fig. 5 : die Draufsicht auf den Kartenaufbau nach Figur 4.5: the top view of the card structure according to FIG. 4.
In Figur 1 ist in unmaßstäblichen Größenverhältnissen ein Ausschnitt aus einem Kartenaufbau im Schnitt dargestellt. Auf einer Trägerfolie 2 ist hierbei ein lumineszierendes Echtheitsmerkmal 3 angeordnet. Bei der Beleuchtung mit beispielsweise UV-Licht 5 wird die Struktur 4 dergestalt angeregt, daß beispielsweise im sichtbaren Licht 6 ein Aufleuchten erfolgt.In Figure 1, an excerpt from a map structure is shown in section on an unscaled scale. A luminescent authenticity feature 3 is arranged on a carrier film 2. When illuminated with, for example, UV light 5, the structure 4 is excited in such a way that, for example, lighting occurs in visible light 6.
Erfindungsgemäß soll nun dieses Echtheitsmerkmal 3 personalisiert werden. Hierzu wird mit einem Laserstrahl 7 (siehe Fig. 2 und 3) beispielsweise ein Schriftzug 8 in die Struktur 4 des Echtheitsmerkmals 3 eingeschrieben. Die Intensität des Laserstrahls ist so gewählt, daß die Struktur 4 lediglich im Bereich der Einwirkung des Laserstrahls in die Struktur 4' übergeführt wird. Hierbei soll die Struktur 4' keine im sichtbaren Licht erkennbare Struktur- oder Farbveränderung aufweisen.According to the invention, this authenticity feature 3 is now to be personalized. For this purpose, a laser beam 7 (see FIGS. 2 and 3) is used, for example Lettering 8 inscribed in the structure 4 of the authenticity feature 3. The intensity of the laser beam is selected so that the structure 4 is transferred to the structure 4 'only in the area of the action of the laser beam. In this case, the structure 4 'should not have any structure or color change which can be seen in visible light.
Lediglich bei der Bestrahlung mit UV-Licht 5 soll die Struktur 4' (siehe Figur 5) nicht mehr oder nur sehr schwach lumineszierend aufleuchten, sondern es soll sich ein andersfarbiges Licht 9 oder sogar ein Negativbild im aufleuchtenden Gesamtbild ergeben. Der eingeschriebene Schriftzug 8 leuchtet also nicht oder nur teilweise oder andersfarbig als der umgebende Bereich auf.Only when irradiated with UV light 5 is the structure 4 '(see FIG. 5) no longer or only very weakly luminescent, but a differently colored light 9 or even a negative image should result in the illuminating overall image. The inscription 8 inscribed does not light up or only partially or in a different color than the surrounding area.
Wird die Lumineszenz durch Wahl der Intensität des Laserstrahls 7 so gewählt, daß es nur zu einer Beeinträchtigung der Lumineszenz, nicht aber zu einer Auslöschung kommt, kann sogar bei Bestrahlung mit einer UV-Lampe 10 ein Halbton- oder Graustufenbild als Schriftzug 8 zu erkennen sein.If the luminescence is chosen by choosing the intensity of the laser beam 7 so that there is only an impairment of the luminescence, but not an extinction, a halftone or grayscale image can be seen as the lettering 8 even when irradiated with a UV lamp 10 ,
Selbstverständlich ist das hier erläuterte Ausführungsbeispiel nicht beschränkend für den Schutzbereich anzusehen. Es gelten sämtliche Varianten und Abwandlungen, die im allgemeinen Beschreibungsteil beschrieben wurden. So bedarf es beispielsweise keiner Bestrahlung mit einer UV-Lampe 10, um das Echtheitsmerkmal 3 zum Aufleuchten zu bringen. Es genügt auch die Anregung mit Strahlung anderer Wellenlängen im nicht-sichtbaren Spektralbereich und/oder im elektromagnetischen Wechselfeld. Of course, the exemplary embodiment explained here should not be viewed as restrictive for the protected area. All variants and modifications that have been described in the general description section apply. For example, no irradiation with a UV lamp 10 is required to make the authenticity feature 3 light up. Excitation with radiation of other wavelengths in the invisible spectral range and / or in the alternating electromagnetic field is also sufficient.
Zeichnunqsle endeDrawing end
Deckfoliecover sheet
Trägerfoliesupport film
Echtheitsmerkmalauthenticity feature
Struktur veränderte StrukturStructure changed structure
UV-Licht abgestrahltes LichtUV light emitted light
Laserstrahllaser beam
Schriftzug (Personalisierung) abgestrahltes LichtLettering (personalization) emitted light
UV-Lampe UV lamp

Claims

Patentansprüche claims
1. Verfahren zur Personalisierung von lumineszierenden Echtheitsmerkmalen auf Datenträgern jeglicher Art, insbesondere Kunststoffkarten, wobei in einem ersten Verfahrensschritt ein lumineszierendes Echtheitsmerkmal (3) in oder auf dem Kartenverbund (1 , 2) auf- oder eingebracht wird, dadurch gekennzeichnet, daß in einem zweiten Verfahrensschritt das Echtheitsmerkmal (3) mit einem energiereichen Strahl (z. B. einem Laserstrahl 7) personalisiert wird, und daß die Intensität und/oder1. A method for personalizing luminescent authenticity features on data carriers of any kind, in particular plastic cards, a luminescent authenticity feature (3) being applied or introduced in or on the card assembly (1, 2) in a first method step, characterized in that in a second Method step the authenticity feature (3) is personalized with an energy-rich beam (eg a laser beam 7), and that the intensity and / or
Wellenlänge des Strahls so gewählt ist, daß ein lokales Bleichen der Struktur (4, 4') des Echtheitsmerkmals (3) stattfindet.The wavelength of the beam is selected so that local bleaching of the structure (4, 4 ') of the authenticity feature (3) takes place.
2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß mit dem Bleichen die farbaktive Substanz des Echtheitsmerkmals (3) mindestens teilweise zerstört wird, und daß die Zerstörung nicht im sichtbaren Licht erkennbar ist.2. The method according to claim 1, characterized in that with the bleaching the color-active substance of the authenticity feature (3) is at least partially destroyed, and that the destruction is not visible in visible light.
3. Verfahren nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die Leistung eines Laserstrahls (7) so moduliert wird, daß ein teilweises Bleichen der Struktur (4') des Echtheitsmerkmals (3) erreicht wird.3. The method according to claim 1 or 2, characterized in that the power of a laser beam (7) is modulated so that a partial bleaching of the structure (4 ') of the authenticity feature (3) is achieved.
4. Verfahren nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß das Echtheitsmerkmal (3) unter Einwirkung eines Elektromagnetfeldes zum Aufleuchten gebracht wird.4. The method according to any one of claims 1 to 3, characterized in that the authenticity feature (3) is illuminated under the action of an electromagnetic field.
5. Vorrichtung zur Ausübung des Verfahrens nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß zur Personalisierung des5. Device for carrying out the method according to one of claims 1 to 4, characterized in that for personalizing the
Echtheitsmerkmals (3) ein Laserstrahl (7) verwendet wird. Authenticity feature (3) a laser beam (7) is used.
6. Vorrichtung zur Ausübung des Verfahrens nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß zur Personalisierung ein Elektronen- oder Neutronenstrahl verwendet wird.6. Device for carrying out the method according to one of claims 1 to 4, characterized in that an electron or neutron beam is used for personalization.
7. Vorrichtung nach Anspruch 5 oder 6, dadurch gekennzeichnet, daß das Aufleuchten des Echtheitsmerkmals (3) durch Photolumineszenz bewirkt ist.7. The device according to claim 5 or 6, characterized in that the lighting of the authenticity feature (3) is effected by photoluminescence.
8. Vorrichtung nach Anspruch 5 oder 6, dadurch gekennzeichnet, daß das Aufleuchten des Echtheitsmerkmals (3) durch Chemolumineszenz bewirkt ist.8. The device according to claim 5 or 6, characterized in that the lighting of the authenticity feature (3) is caused by chemiluminescence.
9. Vorrichtung nach Anspruch 5 oder 6, dadurch gekennzeichnet, daß das Aufleuchten des Echtheitsmerkmals9. The device according to claim 5 or 6, characterized in that the lighting of the authenticity feature
(3) durch Biolumineszenz bewirkt ist.(3) is caused by bioluminescence.
10. Vorrichtung nach einem der Ansprüche 5 bis 9, dadurch gekennzeichnet, daß das Aufleuchten im sichtbaren Spektralbereich erfolgt.10. Device according to one of claims 5 to 9, characterized in that the lighting takes place in the visible spectral range.
11. Vorrichtung nach einem der Ansprüche 5 bis 9, dadurch gekennzeichnet, daß das Aufleuchten im nicht-sichtbaren Spektralbereich erfolgt.11. The device according to one of claims 5 to 9, characterized in that the lighting takes place in the non-visible spectral range.
12. Vorrichtung nach einem der Ansprüche 5 bis 11 , dadurch gekennzeichnet, daß die Anregung des Echtheitsmerkmals (3) durch UV-Licht (5) erfolgt.12. Device according to one of claims 5 to 11, characterized in that the excitation of the authenticity feature (3) by UV light (5).
13. Vorrichtung nach einem der Ansprüche 5 bis 11 , dadurch gekennzeichnet, daß die Anregung des Echtheitsmerkmals (3) durch IR-Strahlung erfolgt. 13. Device according to one of claims 5 to 11, characterized in that the authentication feature (3) is excited by IR radiation.
EP20010969560 2000-09-29 2001-08-01 Method and device for personalising luminescent marks of authenticity Expired - Lifetime EP1322478B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10048812 2000-09-29
DE10048812A DE10048812B4 (en) 2000-09-29 2000-09-29 Data carrier with customizable by means of high-energy beam authenticity features
PCT/EP2001/008879 WO2002026507A1 (en) 2000-09-29 2001-08-01 Method and device for personalising luminescent marks of authenticity

Publications (2)

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EP1322478A1 true EP1322478A1 (en) 2003-07-02
EP1322478B1 EP1322478B1 (en) 2010-02-10

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US (1) US7188776B2 (en)
EP (1) EP1322478B1 (en)
AT (1) ATE457237T1 (en)
AU (1) AU2001289780A1 (en)
DE (2) DE10048812B4 (en)
ES (1) ES2339104T3 (en)
WO (1) WO2002026507A1 (en)

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Also Published As

Publication number Publication date
DE10048812B4 (en) 2005-07-28
WO2002026507A1 (en) 2002-04-04
ES2339104T3 (en) 2010-05-17
ATE457237T1 (en) 2010-02-15
AU2001289780A1 (en) 2002-04-08
US7188776B2 (en) 2007-03-13
EP1322478B1 (en) 2010-02-10
US20050098636A1 (en) 2005-05-12
DE10048812A1 (en) 2002-04-18
DE50115346D1 (en) 2010-03-25

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