EP0537484A1 - Recording media with coloured image, in particular credit or identity card - Google Patents

Recording media with coloured image, in particular credit or identity card Download PDF

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Publication number
EP0537484A1
EP0537484A1 EP92115710A EP92115710A EP0537484A1 EP 0537484 A1 EP0537484 A1 EP 0537484A1 EP 92115710 A EP92115710 A EP 92115710A EP 92115710 A EP92115710 A EP 92115710A EP 0537484 A1 EP0537484 A1 EP 0537484A1
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EP
European Patent Office
Prior art keywords
image information
record carrier
color
image
layer
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
EP92115710A
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German (de)
French (fr)
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EP0537484B1 (en
Inventor
Otto Dr. Bernecker
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Giesecke and Devrient GmbH
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GAO Gesellschaft fuer Automation und Organisation mbH
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Classifications

    • 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
    • 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
    • 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
    • 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
    • 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
    • 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
    • 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
    • B41M5/24—Ablative recording, e.g. by burning marks; Spark recording
    • 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
    • B41M5/382—Contact thermal transfer or sublimation processes
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S283/00—Printed matter
    • Y10S283/904—Credit card

Definitions

  • the invention relates to a recording medium with colored image information, in particular a value or identification card, and a method for producing such a recording medium.
  • Migrating colors form a way of transmitting a color image that is justifiable from a safety point of view.
  • the migration of colors which is based on the fact that special colors are first printed on a plastic layer and then activated by heating to migrate into the volume of the plastic carrier, has the advantage over the other color image-producing methods that the colors extend beyond the surface area Volume of the plastic layer are present and are therefore not easy to remove.
  • the depth of penetration can be controlled as desired by adding a reactive cross-linkable component to the plastic, which at the desired depth of penetration, e.g. B. can be activated by irradiation with UV light. A further migration of the dye is stopped by the onset of crosslinking.
  • the process requires special coordination of the colors used on the one hand and the plastic carriers used on the other. With a correspondingly high depth of penetration of the colors, which is desirable for safety reasons, the resolution or sharpness of the image information suffers.
  • the advantage of using a laser beam recorder lies primarily in the fact that the markings produced with it are not superficial, but arise in the depth of the recording material.
  • the substrate is discolored from the surface down to deeper layers. The discoloration is caused by local burning or by local sooting, it is irreversible.
  • the focal spot of the laser can be limited in such a way that, with precise control, clear portraits that capture even the finest details can be generated.
  • the image information is generally reproduced by a black and white contrast or corresponding halftones. It is generally not possible to create colored motifs that are equivalent in terms of safety technology.
  • the object of the invention is the further development of known recording media in that they are provided with colored image information which also includes fine details, is practically irreversible and can hardly be counterfeited.
  • the record carrier should be simple in construction and inexpensive to produce.
  • the key to the invention is the knowledge that the image information is broken down into two parts, namely a light / dark part and a colored part.
  • One of these parts preferably the light / dark part, is inserted in a largely transparent film layer in a forgery-proof manner.
  • This partial image generated in this way is then congruently superimposed with the other portion, preferably the color compartment, of the same image information.
  • the falsifiability is ensured by the permanent black and white representation introduced by means of a laser; the one printed over it or otherwise applied Color information provides the desired aesthetically pleasing effect.
  • the invention therefore makes it possible to use colored image information in the case of recording media such as value cards or identity cards, it being possible for the colored images in their entirety to not be falsified, since part of the image is in irreversible form in the volume of the material of the recording medium.
  • the record carrier shown in FIG. 1 is a multi-layer record carrier, consisting of a card insert 10, which acts as a light-scattering background.
  • the ticking 10 can optionally be printed with a general printed image and a background pattern 12.
  • a transparent film 14 is arranged on the ticking, for example a film made of rigid PVC, as described in more detail in DE-PS 31 51 407. This film is doped with additives so that it absorbs energy in a defined form in the wavelength range of the laser beam recorder, but is largely transparent in the visible wavelength range. H. is transparent.
  • a certain piece of information in the form of more or less blackened areas is introduced into the transparent film by means of a laser beam recorder.
  • the blackened areas designated 16 in the figure, modulate the intensity of the portion of the incident light reflected by the light-scattering background of the inlet 10. The blacker the areas, the lower the intensity of the reflected light portion reaching the viewer.
  • a color-absorbing layer 18 can be arranged on the transparent film 14 and, after the card has been completed, has the corresponding dyes which represent the color portion of the image information.
  • the color information can also be printed directly on the film 14.
  • Modern transfer techniques are preferably used for the transfer of the color image. In such techniques, the dyes are transferred from a thin ink carrier to the recording medium with heating. The transfer mechanism is either a diffusion step or a sublimation step, depending on the type of dye or dye used. The application of a special ink-absorbing layer 18 is recommended when migrating colors are used.
  • the black and white or gray tone image in the form of the blackening 16 present in the film layer overlaps with the color image 20 printed or applied on the film layer to form an integral overall impression.
  • the gray tone image 16 still remains, a change in the color image 20 would be immediately visible to the viewer, since the light / dark contrast belonging to the image motif would be different or not would match the changed motif.
  • FIG. 2 Another embodiment of the record carrier according to the invention is shown in FIG. 2.
  • the ticking 10 which can optionally consist of paper or plastic, is provided with the color components of the image information 32 by electrophotography.
  • Corresponding methods for the electrophotographic introduction of image information into recording media are e.g. B. from EP-PS 0 012 374 or EP-PS 0 024 344 known.
  • ticking can of course be provided with a background pattern, which is not shown in the figure for reasons of clarity.
  • a thin transparent cover sheet 36 is then arranged over the colored, fixed toner image, into which the light / dark portion of the image information 34 is burned in by means of a laser beam recorder.
  • the colored information portion fulfills not only the aesthetic needs but also the requirements for security against forgery.
  • the light / dark information which determines the visual impression is also applied to the recording medium in a more or less reversible form using a corresponding method.
  • the ticking 10 which can again be printed with a background pattern, is provided with black-and-white information 48 using conventional methods, such as ink-jet, screen printing or the like, or else electrophotography, and is covered in the following step with an essentially transparent plastic film 44 which is suitable for the recording of migrating colors.
  • the colored image portions 46 are introduced in the depth of the cover layer by means of migrating colors.
  • the cover film can first be screen printed with the colored image information. Under the influence of heat, the color migrates into the interior of the top layer until a crosslinking in the top layer is initiated by UV radiation, which stops further migration. This and similar methods are known from DE-PS 27 50 984 already mentioned at the beginning.
  • the color information can also be introduced into the cover layer first; only then is the light / dark information applied using conventional printing methods.
  • the colored information for producing special effects can also be "alienated".
  • the colored image information can also consist of only one or two color value separations.
  • a certain distinctive color value can be displayed in black and white.
  • FIG. 4 schematically shows an apparatus for producing a record carrier according to FIG. 1.
  • the image information is electronically broken down into a light / dark part and a colored part. This is known from modern printing technology and is familiar to the person skilled in the art.
  • the record carrier or the transparent film layer 14 is written with the light / dark portion of the "information". This is done with a conventional laser beam recorder, which is only hinted at here.
  • a laser beam from a laser 24 reaches the surface of the film layer 14 via a deflection device 26 and focusing optics (not shown here). The energy of the laser beam is absorbed by the material of the film layer, as a result of which the material is thermally decomposed or discolored.
  • the associated colored image portion is congruently printed on the gray tone image thus generated in the film layer.
  • a transfer procedure is used for this.
  • a thermal diffusion film is placed in the immediate vicinity of the film layer 14 via the supply rolls 28 brought.
  • a beam expansion lens 28 is pivoted into the beam path and causes the laser beam to heat a surface 30 of the thermal diffusion band which is larger than the focus of the laser beam when the gray tone image is written into the film layer 14.
  • the dyes diffuse into the thermal energy radiated into the diffusion film the recording medium or in an ink-receiving layer 18 provided on the recording medium.
  • the thermal diffusion film can have windows that are transparent to the laser radiation at certain intervals, so that the position of the supply rolls does not have to be changed during the entire recording process. Because in the first method step, the light / dark component is written into the film layer 14 through such a window. For the second process step, a heat-sensitive area of the band is then transported into the effective range of the laser, so that the color information can be transmitted.
  • markings can of course also be provided in the printed image of the card, which are detected by means of optical sensors and with the aid of which the assignment is accomplished. Such markings can be, for example, the boundary of the field into which the image is to be introduced. Equally, however, it can also be any conventional printing marks which are integrated as inconspicuously as possible into the general printed image.
  • the device described in Fig. 4 is only an example; it has the particular advantage that both manufacturing steps, i. H. Writing in the gray tone image and applying the colored image information, by means of which the same laser pen can be used. If one were to choose a printing method for applying the colored partial information, the recording medium would have to be transferred to an appropriate printing device after the gray tone image has been introduced. Knowing the principle according to the invention, these further embodiments can, however, be implemented with the knowledge of the person skilled in the art.

Abstract

The invention relates to a recording medium which is provided with pictorial information in a forgery-proof and high-resolution form, and to a process for its production. The pictorial information is broken down into a light/dark portion and a coloured portion. The light/dark portion, which determines the visual impression, is introduced into the recording medium in a high-resolution form. The coloured pictorial information is superimposed congruently on this portion, so that an integral overall impression is produced. In order to guarantee security against forgery, one of the portions of the pictorial information is introduced into the card structure in a substantially forgery-proof manner. <IMAGE>

Description

Die Erfindung betrifft einen Aufzeichnungsträger mit farbigen Bildinformationen, insbesondere Wert- oder Ausweiskarte sowie ein Verfahren zur Herstellung eines solchen Aufzeichnungsträgers.The invention relates to a recording medium with colored image information, in particular a value or identification card, and a method for producing such a recording medium.

Beim heutigen Stand der Reproduktionstechnik ist die farbige Darstellung von Bildmotiven üblich und wird allgemein erwartet. Auch die Werbung arbeitet bevorzugt mit farblichen Kontrasten. Auch Aufzeichnungsträger wie Bankkarten, Telefonkarten, Kreditkarten etc. können sich diesem Zug der Zeit nicht entziehen, d. h. sie werden bevorzugt mit farbigen Motiven versehen, insbesondere wenn sie neben ihrer eigentlichen Funktion auch als Werbeträger dienen.With the current state of reproduction technology, the colored representation of image motifs is common and is generally expected. Advertising also prefers to work with color contrasts. Even record carriers such as bank cards, telephone cards, credit cards etc. cannot escape this train of time. H. they are preferably provided with colored motifs, especially if they also serve as advertising media in addition to their actual function.

Zur Übertragung von Farbbildern auf derartige Aufzeichnungsträger sind eine Reihe von Möglichkeiten bekannt. Neben den althergebrachten fotografischen Verfahren haben sich in letzter Zeit auch sogenannte Transferverfahren bewährt, bei denen die Farbstoffe von dünnen Farbträgern durch Thermodiffusion oder Thermosublimation auf die oder in die bildtragende Fläche übertragen werden. Farbige Bilder können auch mit der Ink-Jet-Technik oder durch Thermodrucker erzeugt werden, um nur einige Möglichkeiten zu nennen.A number of possibilities are known for transferring color images to such recording media. In addition to the traditional photographic processes, so-called transfer processes have recently proven themselves, in which the dyes are transferred from thin color carriers to or into the image-bearing surface by thermal diffusion or thermal sublimation. Colored images can also be created using ink-jet technology or thermal printers, to name just a few.

Der gemeinsame Nachteil aller dieser Verfahren ist jedoch, daß die aufgebrachten Farbbilder unter dem Gesichtspunkt der Fälschungssicherheit unzureichend sind, da sie an der Oberfläche eines Trägermaterials nur mehr oder weniger fest anhaften. Diese dünne, oberflächige Schicht, welche die Farbstoffe enthält, kann absichtlich oder auch unabsichtlich entfernt bzw. geändert werden. Im Fall von Ausweiskarten, die beispielsweise zwei Jahre oder mehr Gültigkeit haben, besteht die Gefahr einer mechanischen Abnutzung oder auch eines Ausbleichens infolge von Umwelteinflüssen.The common disadvantage of all of these methods, however, is that the color images applied are inadequate from the point of view of counterfeit security, since they only adhere more or less firmly to the surface of a carrier material. This thin, superficial layer, which contains the dyes, can be removed or changed intentionally or unintentionally. In the case of identity cards, for example, two years or more valid, there is a risk of mechanical wear or fading due to environmental influences.

Eine vom sicherheitstechnischen Standpunkt aus vertretbare Möglichkeit zur Übertragung eines Farbbildes bilden migrierende Farben, wie sie aus der DE-PS 27 50 984 bekannt sind. Die Migration von Farben, die darauf beruht, daß spezielle Farben zuerst auf einer Kunststoffschicht verdruckt und anschließend durch Erhitzung dazu aktiviert werden, in das Volumen des Kunststoffträgers hineinzuwandern, besitzt gegenüber den übrigen Farbbilder erzeugenden Verfahren den Vorteil, daß die Farben über den Oberflächenbereich hinaus im Volumen der Kunststoffschicht vorliegen und somit nicht einfach zu entfernen sind. Dabei ist die Eindringtiefe beliebig steuerbar, indem dem Kunststoff eine reaktionsfähige vernetzbare Komponente zugesetzt wird, die bei der gewünschten Eindringtiefe, z. B. durch Bestrahlung mit UV-Licht, aktiviert werden kann. Durch die einsetzende Vernetzung wird eine weitere Migration des Farbstoffs gestoppt.Migrating colors, as are known from DE-PS 27 50 984, form a way of transmitting a color image that is justifiable from a safety point of view. The migration of colors, which is based on the fact that special colors are first printed on a plastic layer and then activated by heating to migrate into the volume of the plastic carrier, has the advantage over the other color image-producing methods that the colors extend beyond the surface area Volume of the plastic layer are present and are therefore not easy to remove. The depth of penetration can be controlled as desired by adding a reactive cross-linkable component to the plastic, which at the desired depth of penetration, e.g. B. can be activated by irradiation with UV light. A further migration of the dye is stopped by the onset of crosslinking.

Das Verfahren erfordert eine spezielle Abstimmung der eingesetzten Farben einerseits und der verwendeten Kunststoffträger andererseits. Bei entsprechend hoher Eindringstiefe der Farben, die aus sicherheitstechnischen Gründen wünschenswert ist, leidet die Auflösung bzw. Schärfe der Bildinformation.The process requires special coordination of the colors used on the one hand and the plastic carriers used on the other. With a correspondingly high depth of penetration of the colors, which is desirable for safety reasons, the resolution or sharpness of the image information suffers.

Unter dem Gesichtspunkt der Fälschungssicherheit bei gleichzeitig hoher Bildauflösung haben sich sogenannte Laserstrahlschreiber bewährt, bei denen die zu übertragenden Informationen mittels eines fokussierten Laserstrahls in das Material der Aufzeichnungsträger eingebrannt werden. Aus der DE-PS 29 07 004 ist eine Ausweiskarte mit einem Karteninlett aus Papier und einer transparenten Deckfolie bekannt, bei der bestimmte Informationen nach Auflaminierung der Deckfolie mittels Laserstrahls direkt in das Karteninlett eingeschrieben bzw. eingebrannt werden.From the point of view of counterfeit security with a simultaneously high image resolution, so-called laser beam recorders have proven themselves, in which the information to be transmitted is burned into the material of the recording medium by means of a focused laser beam. From DE-PS 29 07 004 an identification card with a card insert made of paper and a transparent cover film is known in which certain information after the cover film has been laminated on, it can be written or burned directly into the card insert using a laser beam.

Aus der DE-PS 31 51 407 ist eine mehrschichtige Ausweiskarte mit einer besonders konzipierten transparenten Deckfolie bekannt. Die Deckfolie ist trotz ihrer Transparenz im sichtbaren Bereich des Spektrums in der Lage, die Energie des Laserstrahls zu absorbieren, so daß Informationen direkt in die Deckfolie eingeschrieben werden können.From DE-PS 31 51 407 a multi-layer identification card with a specially designed transparent cover film is known. Despite its transparency in the visible region of the spectrum, the cover film is able to absorb the energy of the laser beam, so that information can be written directly into the cover film.

Der Vorteil der Verwendung eines Laserstrahlschreibers liegt in erster Linie darin, daß die damit erzeugten Markierungen nicht oberflächlich vorliegen, sondern in der Tiefe des Aufzeichnungsmaterials entstehen. Das Trägermaterial wird dabei von der Oberfläche ausgehend bis in tiefere Schichten verfärbt. Die Verfärbung erfolgt durch ein lokales Verbrennen oder durch eine lokale Verrußung, sie ist irreversibel. Gleichzeitig kann der Brennfleck des Lasers derart begrenzt werden, daß bei präziser Steuerung klare und auch feinste Einzelheiten erfassende Porträts erzeugbar sind.The advantage of using a laser beam recorder lies primarily in the fact that the markings produced with it are not superficial, but arise in the depth of the recording material. The substrate is discolored from the surface down to deeper layers. The discoloration is caused by local burning or by local sooting, it is irreversible. At the same time, the focal spot of the laser can be limited in such a way that, with precise control, clear portraits that capture even the finest details can be generated.

Bei der Verwendung von Laserstrahlschreibern und üblichen Kartenaufbauten wird die Bildinformation im allgemeinen durch einen Schwarzweiß-Kontrast bzw. entsprechende Halbtöne wiedergegeben. Die Erzeugung von sicherheitstechnisch gleichwertigen farbigen Motiven ist in der Regel nicht möglich.When using laser beam recorders and conventional card structures, the image information is generally reproduced by a black and white contrast or corresponding halftones. It is generally not possible to create colored motifs that are equivalent in terms of safety technology.

Beim bisherigen Stand der Technik ist also zu unterscheiden zwischen Informationen, die als Schwarzweiß-Kontrast in hochaufgelöster Form in einen Aufzeichnungsträger eingebracht werden können und die weitgehend fälschungssicher sind und andererseits Farbbildern, die mittels herkömmlicher Verfahren aufgebracht werden, aber entweder ohne größeren Aufwand entfernt oder geändert werden können oder bei ausreichender Fälschungssicherheit eine geringe Bildauflösung liefern.In the prior art, a distinction must therefore be made between information that can be introduced into a recording medium as black-and-white contrast in high-resolution form and that is largely tamper-proof and, on the other hand, color images that are applied using conventional methods can either be removed or changed with little effort or provide a low image resolution if there is sufficient protection against forgery.

Aufgabe der Erfindung ist die Weiterentwicklung bekannter Aufzeichnungsträger dahingehend, daß sie mit einer farbigen Bildinformation versehen werden, die auch feine Einzelheiten umfaßt, praktisch irreversibel ist und nahezu nicht gefälscht werden kann. Der Aufzeichnungsträger soll aber trotz dieser hohen Fälschungssicherheit einfach aufgebaut und kostengünstig herstellbar sein.The object of the invention is the further development of known recording media in that they are provided with colored image information which also includes fine details, is practically irreversible and can hardly be counterfeited. Despite this high level of security against forgery, the record carrier should be simple in construction and inexpensive to produce.

Erfindungsgemäß wird diese Aufgabe durch die kennzeichnenden Merkmale der Ansprüche 1, 16 und 25 gelöst. Vorteilhafte Weiterbildungen sind den Unteransprüchen zu entnehmen.According to the invention, this object is achieved by the characterizing features of claims 1, 16 and 25. Advantageous further developments can be found in the subclaims.

Entscheidend für die Erfindung ist die Erkenntnis, die Bildinformationen in zwei Anteile zu zerlegen, nämlich einen Hell/Dunkelanteil und einen farbigen Anteil. Einer dieser Anteile, vorzugsweise der Hell/Dunkelanteil, wird fälschungssicher in eine weitgehend transparente Folienschicht eingebracht. Dieses so erzeugte Teilbild wird dann kongruent mit dem jeweils anderen Anteil, vorzugsweise dem Farbabteil, der gleichen Bildinformation überlagert. Daraus ergibt sich ein komplexer Gesamteindruck, der sich aus dem Farbwert der unterschiedlichen überlagerten Bildanteile und der Rückstreukraft des Hintergrunds zusammensetzt. Entfernt man nun den reversiblen Teil der Bildinformation, verbleibt immer noch der fest im Kartenaufbau verankerte Teil, der die Identifikation unverändert möglich macht.The key to the invention is the knowledge that the image information is broken down into two parts, namely a light / dark part and a colored part. One of these parts, preferably the light / dark part, is inserted in a largely transparent film layer in a forgery-proof manner. This partial image generated in this way is then congruently superimposed with the other portion, preferably the color compartment, of the same image information. This results in a complex overall impression, which is composed of the color value of the different superimposed parts of the image and the backscattering force of the background. If you now remove the reversible part of the image information, the part that is firmly anchored in the card structure, which makes identification unchanged, still remains.

In einer bevorzugten Ausführungsform wird die Unverfälschbarkeit durch die mittels eines Lasers eingebrachte dauerhafte Schwarzweiß-Darstellung gesichert; die darüber gedruckte oder anderweitig aufgebrachte Farbinformation liefert den gewünschten ästhetisch ansprechenden Effekt. Die Erfindung ermöglicht es daher, farbige Bildinformationen bei Aufzeichnungsträgern wie Wert- oder Ausweiskarten zu verwenden, wobei die farbigen Bilder in ihrer Gesamtheit nicht gefälscht werden können, da ein Teil des Bildes in irreversibler Form im Volumen des Materials des Aufzeichnungsträgers vorliegt.In a preferred embodiment, the falsifiability is ensured by the permanent black and white representation introduced by means of a laser; the one printed over it or otherwise applied Color information provides the desired aesthetically pleasing effect. The invention therefore makes it possible to use colored image information in the case of recording media such as value cards or identity cards, it being possible for the colored images in their entirety to not be falsified, since part of the image is in irreversible form in the volume of the material of the recording medium.

Als besonders vorteilhaft erweist es sich, daß mit der Erfindung vorhandene Technologien, die jeweils für sich betrachtet die Aufgabe, ein fälschungs- und verfälschungssicheres Farbbild zu erzeugen, nicht lösen können, derart kombiniert werden, daß die Vorteile der einzelnen Technologien nutzbar sind, ohne daß deren Nachteile in Kauf genommen werden müssen. So ist beispielsweise die Kombination scharfer Schwarzweiß-Informationen mit mehr oder weniger unscharfen Farbinformationen jederzeit möglich, ohne daß das so entstandene Farbbild unscharf erscheint. Dieser Aspekt kann sogar in Weiterbildung der Erfindung gezielt genutzt werden, indem die Farbinformationen des Bildes nicht nur in Techniken aufgebracht werden, die in sich unscharfe Konturen ergeben (z. B. migrierende Farben), sondern indem die Farbinformationen bereits in relativ grober Auflösung, d. h. mit reduziertem Datenaufwand, verarbeitet werden.It proves to be particularly advantageous that existing technologies, which, viewed individually, cannot solve the problem of producing a forgery-proof and tamper-proof color image, are combined in such a way that the advantages of the individual technologies can be used without the disadvantages of which must be accepted. For example, the combination of sharp black and white information with more or less blurred color information is possible at any time without the resulting color image appearing blurred. This aspect can even be used specifically in a further development of the invention in that the color information of the image is not only applied using techniques that result in fuzzy contours (e.g. migrating colors), but also in that the color information is already available in a relatively coarse resolution, i . H. with reduced data expenditure.

Nachfolgend werden einige Ausführungsformen der Erfindung anhand der beigefügten Zeichnungen beispielsweise beschrieben. Darin zeigen

Fig. 1 - 3
Querschnitte durch Ausführungsbeispiele des erfindungsgemäßen Aufzeichnungsträgers und
Fig. 4
eine schematische Darstellung einer Vorrichtung zur Herstellung eines Aufzeichnungsträgers.
Some embodiments of the invention are described below with reference to the accompanying drawings, for example. Show in it
1 - 3
Cross sections through embodiments of the recording medium according to the invention and
Fig. 4
is a schematic representation of an apparatus for producing a recording medium.

Bei dem in Fig. 1 gezeigten Aufzeichnungsträger handelt es sich um einen mehrschichtigen Aufzeichnungsträger, bestehend aus einem Karteninlett 10, das als lichtstreuender Hintergrund wirkt. Das Inlett 10 kann gegebenenfalls mit einem allgemeinen Druckbild sowie einem Hintergrundmuster 12 bedruckt sein. Bei Wertpapieren ist es insbesondere üblich, schwer nachahmbare Guillochen als Hintergrundmuster zu verwenden. Auf dem Inlett ist eine transparente Folie 14 angeordnet, beispielsweise eine Folie aus Hart-PVC, wie sie in der DE-PS 31 51 407 näher beschrieben ist. Diese Folie ist mit Zusatzstoffen dotiert, so daß sie im Wellenlängenbereich des Laserstrahlschreibers in definierter Form Energie absorbiert, im sichtbaren Wellenlängenbereich jedoch weitgehend transparent, d. h. durchsichtig, ist.The record carrier shown in FIG. 1 is a multi-layer record carrier, consisting of a card insert 10, which acts as a light-scattering background. The ticking 10 can optionally be printed with a general printed image and a background pattern 12. In the case of securities, it is particularly common to use guilloches that are difficult to copy as background patterns. A transparent film 14 is arranged on the ticking, for example a film made of rigid PVC, as described in more detail in DE-PS 31 51 407. This film is doped with additives so that it absorbs energy in a defined form in the wavelength range of the laser beam recorder, but is largely transparent in the visible wavelength range. H. is transparent.

In die transparente Folie wird mittels eines Laserstrahlschreibers eine bestimmte Information in Form mehr oder weniger geschwärzter Bereiche eingebracht. Die geschwärzten Bereiche, in der Fig. mit 16 bezeichnet, modulieren die Intensität des vom lichtstreuenden Hintergrund des Inletts 10 reflektierten Anteils des einfallenden Lichts. Je geschwärzter die Bereiche sind, desto geringer ist die Intensität des zum Betrachter gelangenden reflektierten Lichtanteils.A certain piece of information in the form of more or less blackened areas is introduced into the transparent film by means of a laser beam recorder. The blackened areas, designated 16 in the figure, modulate the intensity of the portion of the incident light reflected by the light-scattering background of the inlet 10. The blacker the areas, the lower the intensity of the reflected light portion reaching the viewer.

Auf der transparenten Folie 14 kann eine farbaufnehmende Schicht 18 angeordnet sein, die nach Fertigstellung der Karte die entsprechenden Farbstoffe aufweist, welche den Farbanteil der Bildinformationen darstellen. Statt der farbaufnehmenden Schicht 18 kann die Farbinformation auch direkt auf die Folie 14 aufgedruckt sein. Bevorzugt werden moderne Transfertechniken für die Übertragung des Farbbildes eingesetzt. Bei derartigen Techniken werden die Farbstoffe von einem dünnen Farbträger unter Erwärmung auf den Aufzeichnungsträger übertragen. Der Übertragungsmechanismus ist entweder ein Diffusionsschritt oder ein Sublimationsschritt, je nach Art der verwendeten Farbträger bzw. Farbstoffe. Die Anbringung einer besonderen farbaufnehmenden Schicht 18 empfiehlt sich dann, wenn migrierende Farben verwendet werden.A color-absorbing layer 18 can be arranged on the transparent film 14 and, after the card has been completed, has the corresponding dyes which represent the color portion of the image information. Instead of the ink-absorbing layer 18, the color information can also be printed directly on the film 14. Modern transfer techniques are preferably used for the transfer of the color image. In such techniques, the dyes are transferred from a thin ink carrier to the recording medium with heating. The transfer mechanism is either a diffusion step or a sublimation step, depending on the type of dye or dye used. The application of a special ink-absorbing layer 18 is recommended when migrating colors are used.

Ein Beispiel für ein Transferverfahren ist in der europäischen Patentanmeldung 0 390 928 beschrieben. Bei der bekannten Technik wird ein Thermosublimationsverfahren eingesetzt, um Farbstoffe von einem Farbträger auf einen Aufzeichnungsträger zu transportieren. Im bekannten Fall wird die für die Sublimation erforderliche Wärme mit einem entsprechend geformten Stempel zugeführt. Es ist jedoch auch möglich, die erforderliche Energie mit einem Laserstrahl zuzuführen.An example of a transfer method is described in European patent application 0 390 928. In the known technique, a thermal sublimation process is used to transport dyes from an ink carrier to a recording medium. In the known case, the heat required for sublimation is supplied with a suitably shaped stamp. However, it is also possible to supply the required energy with a laser beam.

Für den Betrachter überlagert sich das in der Folienschicht vorhandene Schwarzweiß- bzw. Grautonbild in Form der Schwärzungen 16 mit dem auf der Folienschicht aufgedruckten oder aufgebrachten Farbbild 20 zu einem integralen Gesamteindruck. Beim Entfernen des Farbbildes 20 bzw. der Farbschicht 18 bleibt das Grautonbild 16 nach wie vor bestehen, eine Änderung des Farbbildes 20 würde für den Betrachter sofort sichtbar werden, da dann der zum Bildmotiv gehörende Hell/Dunkel-Kontrast ein anderer wäre, bzw. nicht zu dem geänderten Bildmotiv passen würde.For the viewer, the black and white or gray tone image in the form of the blackening 16 present in the film layer overlaps with the color image 20 printed or applied on the film layer to form an integral overall impression. When the color image 20 or the color layer 18 is removed, the gray tone image 16 still remains, a change in the color image 20 would be immediately visible to the viewer, since the light / dark contrast belonging to the image motif would be different or not would match the changed motif.

Eine weitere Ausführungsform des erfindungsgemäßen Aufzeichnungsträgers ist in Fig. 2 gezeigt. Das Inlett 10, welches wahlweise aus Papier oder Kunststoff bestehen kann, wird auf elektrofotografischem Wege mit den Farbanteilen der Bildinformation 32 versehen. Entsprechende Verfahren zum elektrofotografischen Einbringen von Bildinformationen in Aufzeichnungsträger sind z. B. aus EP-PS 0 012 374 oder der EP-PS 0 024 344 bekannt.Another embodiment of the record carrier according to the invention is shown in FIG. 2. The ticking 10, which can optionally consist of paper or plastic, is provided with the color components of the image information 32 by electrophotography. Corresponding methods for the electrophotographic introduction of image information into recording media are e.g. B. from EP-PS 0 012 374 or EP-PS 0 024 344 known.

Das Inlett kann natürlich auch in diesem Fall zuvor mit einem Hintergrundmuster versehen werden, das aus Gründen der Übersichtlichkeit in der Figur nicht gezeigt wird. Über dem farbigen fixierten Tonerbild wird anschließend eine dünne transparente Deckfolie 36 angeordnet, in die der Hell/Dunkel-Anteil der Bildinformation 34 mittels eines Laserstrahlschreibers eingebrannt wird.In this case, too, the ticking can of course be provided with a background pattern, which is not shown in the figure for reasons of clarity. A thin transparent cover sheet 36 is then arranged over the colored, fixed toner image, into which the light / dark portion of the image information 34 is burned in by means of a laser beam recorder.

In Fig. 3 ist eine weitere Variante des erfindungsgemäßen Aufzeichnungsträgers dargestellt. Im Gegensatz zu dem in Fig. 1 gezeigten Aufzeichnungsträgers erfüllt der farbige Informationsanteil hier neben den ästhetischen Bedürfnissen auch die Erfordernisse an die Fälschungssicherheit. Um dem Nachteil der geringen Auflösung zu begegnen, wird auch in diesem Fall die für den visuellen Eindruck bestimmende Hell/Dunkel-Information mit einem entsprechenden Verfahren, allerdings in mehr oder weniger reversibler Form auf den Aufzeichnungsträger aufgebracht.3 shows a further variant of the recording medium according to the invention. In contrast to the record carrier shown in FIG. 1, the colored information portion fulfills not only the aesthetic needs but also the requirements for security against forgery. In order to counter the disadvantage of the low resolution, the light / dark information which determines the visual impression is also applied to the recording medium in a more or less reversible form using a corresponding method.

Hierbei wird das Inlett 10, das wieder mit einem Hintergrundmuster bedruckt sein kann, unter Verwendung herkömmlicher Verfahren, wie Ink-Jet, Siebdruck oder dergleichen oder auch der Elektrofotografie mit Schwarzweiß-Informationen 48 versehen und im folgenden Schritt mit einer im wesentlichen transparenten Kunststoffolie 44 abgedeckt, die für die Aufnahme von migrierenden Farben geeignet ist. Kongruent zu dieser Hell/Dunkel-Information 48 sind die farbigen Bildanteile 46 mittels migrierender Farben in der Tiefe der Deckschicht eingebracht. Die Deckfolie kann hierbei zuerst mit der farbigen Bildinformation im Siebdruck bedruckt werden. Unter Wärmeeinwirkung migriert die Farbe so lange in das Innere der Deckschicht, bis durch UV-Bestrahlung eine Vernetzung in der Deckschicht iniziiert wird, die eine weitere Migration stoppt. Dieses und ähnliche Verfahren sind aus der eingangs bereits erwähnten DE-PS 27 50 984 bekannt.In this case, the ticking 10, which can again be printed with a background pattern, is provided with black-and-white information 48 using conventional methods, such as ink-jet, screen printing or the like, or else electrophotography, and is covered in the following step with an essentially transparent plastic film 44 which is suitable for the recording of migrating colors. Congruent to this light / dark information 48, the colored image portions 46 are introduced in the depth of the cover layer by means of migrating colors. The cover film can first be screen printed with the colored image information. Under the influence of heat, the color migrates into the interior of the top layer until a crosslinking in the top layer is initiated by UV radiation, which stops further migration. This and similar methods are known from DE-PS 27 50 984 already mentioned at the beginning.

Alternativ kann auch zuerst die Farbinformation in die Deckschicht eingebracht werden; erst im Anschluß daran wird die Hell/Dunkel-Information mit herkömmlichen Druckmethoden aufgebracht.Alternatively, the color information can also be introduced into the cover layer first; only then is the light / dark information applied using conventional printing methods.

Für alle Ausführungsbeispiele gilt, daß die farbige Information zur Erzeugung besonderer Wirkungen auch "verfremdet" sein kann. Beispielsweise kann die farbige Bildinformation auch nur aus einer oder zwei Farbwertauszügen bestehen. Ebenso kann anstelle der Hell/Dunkel-Information ein bestimmter markanter Farbwertauszug in schwarzweiß dargestellt werden.It applies to all exemplary embodiments that the colored information for producing special effects can also be "alienated". For example, the colored image information can also consist of only one or two color value separations. Likewise, instead of the light / dark information, a certain distinctive color value can be displayed in black and white.

In Fig. 4 ist eine Vorrichtung zur Herstellung eines Aufzeichnungsträgers gemäß Fig. 1 schematisch dargestellt. Zunächst wird die Bildinformation elektronisch zerlegt in einen Hell/Dunkel-Anteil und in einen farbigen Anteil. Derartiges ist aus der modernen Drucktechnik bekannt und dem Fachmann geläufig.FIG. 4 schematically shows an apparatus for producing a record carrier according to FIG. 1. First, the image information is electronically broken down into a light / dark part and a colored part. This is known from modern printing technology and is familiar to the person skilled in the art.

Zunächst wird der Aufzeichnungsträger bzw. die transparente Folienschicht 14 mit dem Hell/Dunkel-Anteil der "Information" beschrieben. Dies erfolgt mit einem konventionellen Laserstrahlschreiber, der hier nur angedeutet ist. Von einem Laser 24 gelangt ein Laserstrahl über eine Ablenkvorrichtung 26 und eine hier nicht gezeigte Fokussieroptik auf die Oberfläche der Folienschicht 14. Vom Material der Folienschicht wird die Energie des Laserstrahls absorbiert, wodurch sich das Material thermisch zersetzt bzw. verfärbt.First, the record carrier or the transparent film layer 14 is written with the light / dark portion of the "information". This is done with a conventional laser beam recorder, which is only hinted at here. A laser beam from a laser 24 reaches the surface of the film layer 14 via a deflection device 26 and focusing optics (not shown here). The energy of the laser beam is absorbed by the material of the film layer, as a result of which the material is thermally decomposed or discolored.

In einem zweiten Verfahrensschritt wird auf das so in der Folienschicht erzeugte Grautonbild der zugehörige farbige Bildanteil kongruent aufgedruckt. Im gezeigten Beispiel bedient man sich dafür eines Transferverfahrens. Über die Vorratsrollen 28 wird eine Thermodiffusionsfolie in unmittelbarer Nachbarschaft der Folienschicht 14 gebracht. Eine Strahlaufweitungsoptik 28 wird im Strahlengang eingeschwenkt und bewirkt, daß der Laserstrahl eine Fläche 30 des Thermodiffusionsbandes erwärmt, die größer ist als der Fokus des Laserstrahls bei der Einschreibung des Grautonbildes in die Folienschicht 14. Durch die in der Diffusionsfolie eingestrahlte thermische Energie diffundieren die Farbstoffe in den Aufzeichnungsträger bzw. in eine auf den Aufzeichnungsträger vorgesehene farbaufnehmende Schicht 18.In a second method step, the associated colored image portion is congruently printed on the gray tone image thus generated in the film layer. In the example shown, a transfer procedure is used for this. A thermal diffusion film is placed in the immediate vicinity of the film layer 14 via the supply rolls 28 brought. A beam expansion lens 28 is pivoted into the beam path and causes the laser beam to heat a surface 30 of the thermal diffusion band which is larger than the focus of the laser beam when the gray tone image is written into the film layer 14. The dyes diffuse into the thermal energy radiated into the diffusion film the recording medium or in an ink-receiving layer 18 provided on the recording medium.

Die Thermodiffusionsfolie kann in bestimmten Abständen für die Laserstrahlung transparente Fenster aufweisen, so daß die Position der Vorratsrollen während des gesamten Aufzeichnungsprozesses nicht verändert werden muß. Denn im ersten Verfahrensschritt wird durch ein derartiges Fenster hindurch der Hell/Dunkelanteil in die Folienschicht 14 eingeschrieben. Für den zweiten Verfahrensschritt wird anschließend ein wärmeempfindlicher Bereich des Bandes in den Wirkungskreis des Lasers transportiert, so daß die Übertragung der Farbinformation erfolgen kann.The thermal diffusion film can have windows that are transparent to the laser radiation at certain intervals, so that the position of the supply rolls does not have to be changed during the entire recording process. Because in the first method step, the light / dark component is written into the film layer 14 through such a window. For the second process step, a heat-sensitive area of the band is then transported into the effective range of the laser, so that the color information can be transmitted.

Durch die unterschiedliche Rastergröße (Auflösung) zwischen Grautonbild und Farbbild können bestimmte ästhetische Effekte erzielt werden. Natürlich kann man auch mit gleicher Auflösung arbeiten, beispielsweise dann, wenn der farbige Bildanteil nicht mittels eines Transferverfahrens aufgebracht, sondern unter Verwendung eines konventionellen Verfahrens aufgedruckt wird.Due to the different grid size (resolution) between the gray tone image and the color image, certain aesthetic effects can be achieved. Of course, it is also possible to work with the same resolution, for example if the colored image portion is not applied by means of a transfer process, but rather is printed on using a conventional process.

Unabhängig davon, ob die beiden Informationsanteile mit derselben "Druckvorrichtung" wie bei der in Fig. 4 dargestellten Laseranordnung oder in völlig getrennten Verfahrensschritten erzeugt werden, ist immer eine Koordination der Datensätze notwendig, damit die gewünschte Kongruenz erzielt wird. Erfindungsgemäß wird diese Deckungsgleichheit beispielsweise mit Datensätzen erzielt, die auf die Kartenkanten bezogenene, gemeinsame xy-Koordinaten aufweisen. Alternativ dazu können natürlich auch im Druckbild der Karte Markierungen vorgesehen sein, die mittels optischer Sensoren erfaßt und mit deren Hilfe die Zuordnung bewerkstelligt wird. Derartige Markierungen können beispielsweise die Begrenzung des Feldes sein, in das das Bild eingebracht werden soll. Gleichermaßen können es aber auch beliebige, möglichst unauffällig im allgemeinen Druckbild integrierte, herkömmliche Druckmarken sein.Regardless of whether the two pieces of information are generated with the same "printing device" as in the laser arrangement shown in FIG. 4 or in completely separate process steps, it is always necessary to coordinate the data records so that the desired congruence is achieved. According to the invention, this congruence is achieved, for example, with data records that are common to the card edges have xy coordinates. Alternatively, markings can of course also be provided in the printed image of the card, which are detected by means of optical sensors and with the aid of which the assignment is accomplished. Such markings can be, for example, the boundary of the field into which the image is to be introduced. Equally, however, it can also be any conventional printing marks which are integrated as inconspicuously as possible into the general printed image.

Die in Fig. 4 beschriebene Vorrichtung ist lediglich ein Beispiel; sie hat den besonderen Vorteil, daß beide Herstellungsschritte, d. h. Einschreiben des Grautonbildes und Aufbringen der farbigen Bildinformation, durch die Verwendung ein und desselben Laserschreibers durchgeführt werden können. Würde man ein Druckverfahren für das Aufbringen der farbigen Teilinformationen wählen, müßte der Aufzeichnungsträger nach dem Einbringen des Grautonbildes in eine entsprechende Druckvorrichtung überstellt werden. In Kenntnis des erfindungsgemäßen Prinzips sind diese weiteren Ausführungsformen aber mit dem Wissen des Durchschnittsfachmanns realisierbar.The device described in Fig. 4 is only an example; it has the particular advantage that both manufacturing steps, i. H. Writing in the gray tone image and applying the colored image information, by means of which the same laser pen can be used. If one were to choose a printing method for applying the colored partial information, the recording medium would have to be transferred to an appropriate printing device after the gray tone image has been introduced. Knowing the principle according to the invention, these further embodiments can, however, be implemented with the knowledge of the person skilled in the art.

Claims (26)

Aufzeichnungsträger mit farbigen Bildinformationen, insbesondere Wert- oder Ausweiskarte, dadurch gekennzeichnet, daß die Bildinformation in mindestens zwei Informationsteile aufgeteilt ist, welche sich zur Gesamtinformation ergänzen, wobei die Teilinformationen in getrennten Arbeitsschritten aufgebracht sind und mindestens eine der beiden Teilinformationen in von außen nicht zugänglicher Form vorliegt.Record carrier with colored image information, in particular a value or identification card, characterized in that the image information is divided into at least two pieces of information which complement each other to form the total information, the partial information being applied in separate work steps and at least one of the two pieces of information being inaccessible from the outside is present. Aufzeichnungsträger nach Anspruch 1, dadurch gekennzeichnet, daß der Aufzeichnungsträger wenigstens eine transparente Folienschicht (14, 36, 44) aufweist, in welcher der erste Teil der Bildinformation in irreversibler Form (16, 34, 46) vorliegt und daß der zweite Teil der Bildinformation (20, 32, 48) kongruent zu diesem ersten Teil angeordnet ist, so daß sich die beiden Teilbilder zu einer Gesamtkomposition überlagern.Record carrier according to claim 1, characterized in that the record carrier has at least one transparent film layer (14, 36, 44) in which the first part of the image information is in irreversible form (16, 34, 46) and that the second part of the image information ( 20, 32, 48) is arranged congruently to this first part, so that the two partial images overlap to form an overall composition. Aufzeichnungsträger nach Anspruch 2, dadurch gekennzeichnet, daß die Bildinformation in einen Scharzweiß- und einen Farbanteil aufgeteilt ist.Record carrier according to claim 2, characterized in that the image information is divided into a black and a white part. Aufzeichnungsträger nach Anspruch 3, dadurch gekennzeichnet, daß der erste Teil der Bildinformation (16) der Schwarzweiß-Anteil ist und daß dieser Teil der Information mittels eines Laserstrahlschreibers in Form eines Grautonbildes in die transparente Folienschicht (14, 36, 44) eingebrannt ist.Record carrier according to claim 3, characterized in that the first part of the image information (16) is the black-and-white portion and that this part of the information is burned into the transparent film layer (14, 36, 44) by means of a laser beam recorder in the form of a gray tone image. Aufzeichnungsträger nach wenigstens einem der Ansprüche 1 - 4, dadurch gekennzeichnet, daß die Farbschicht als separate, auf der transparenten Folienschicht (14) angeordnete farbaufnehmende Schicht (18) vorliegt.Record carrier according to at least one of Claims 1 to 4, characterized in that the color layer is present as a separate color-receiving layer (18) arranged on the transparent film layer (14). Aufzeichnungsträger nach Anspruch 1, dadurch gekennzeichnet, daß der erste Teil der Bildinformation ein mittels migrierender Farben eingebrachtes Farbbild (46) ist.Record carrier according to claim 1, characterized in that the first part of the image information is a color image (46) introduced by means of migrating colors. Aufzeichnungsträger nach Anspruch 6, dadurch gekennzeichnet, daß der zweite Teil der Bildinformation ein Grautonbild (48) ist.Record carrier according to claim 6, characterized in that the second part of the image information is a gray tone image (48). Aufzeichnungsträger nach Anspruch 7, dadurch gekennzeichnet, daß das Grautonbild aufgedruckt ist.Record carrier according to claim 7, characterized in that the gray tone image is printed. Aufzeichnungsträger nach wenigstens einem der Ansprüche 1 - 8, dadurch gekennzeichnet, daß die transparente Folienschicht (14, 36, 44) als Deckfolie auf einer Trägerschicht wie einem Karteninlett (10) aufgebracht ist.Record carrier according to at least one of Claims 1-8, characterized in that the transparent film layer (14, 36, 44) is applied as a cover film on a carrier layer such as a card insert (10). Aufzeichnungsträger nach Anspruch 9, dadurch gekennzeichnet, daß das Karteninlett (10) ein Hintergrundmuster (12) aufweist, das mit der Bildinformation harmoniert.Record carrier according to claim 9, characterized in that the card insert (10) has a background pattern (12) which harmonizes with the image information. Aufzeichnungsträger nach wenigstens einem der Ansprüche 7 - 10, dadurch gekennzeichnet, daß das Grautonbild (48) auf der Trägerschicht (10) aufgebracht ist.Record carrier according to at least one of Claims 7-10, characterized in that the gray tone image (48) is applied to the carrier layer (10). Aufzeichnungsträger nach wenigstens einem der Ansprüche 1 - 11, dadurch gekennzeichnet, daß die transparente Folienschicht (14) aus Hart-PVC besteht.Record carrier according to at least one of claims 1 to 11, characterized in that the transparent film layer (14) consists of hard PVC. Aufzeichnungsträger nach wenigstens einem der Ansprüche 1 - 12, dadurch gekennzeichnet, daß das Grautonbild das Schwarzweiß-Positiv der Bildinformation darstellt.Record carrier according to at least one of claims 1-12, characterized in that the gray tone image is the black and white positive of the image information represents. Aufzeichnungsträger nach wenigstens einem der Ansprüche 1 - 12, dadurch gekennzeichnet, daß das Grautonbild das Schwarzweiß-Positiv eines Farbauszugs der Bildinformation darstellt.Record carrier according to at least one of claims 1-12, characterized in that the gray tone image represents the black and white positive of a color separation of the image information. Aufzeichnungsträger nach wenigstens einem der Ansprüche 1 - 14, dadurch gekennzeichnet, daß der farbige Anteil der Bildinformation eine geringere Ortsauflösung aufweist als das Grautonbild.Record carrier according to at least one of claims 1-14, characterized in that the colored portion of the image information has a lower spatial resolution than the gray tone image. Verfahren zur Herstellung eines Aufzeichnungsträgers, insbesondere einer Wert- oder Ausweiskarte mit einer farbigen Bildinformation, gekennzeichnet, durch die folgenden Schritte: a) Zerlegen der Bildinformationen in einen Hell/DunkelAnteil einerseits und einen Farbanteil andererseits mittels an sich bekannter elektronischer Verfahren, b) Einbringen des Hell/Dunkel-Anteils der Bildinformation mittels eines gesteuerten Laserstrahls in eine sensibilisierte, transparente Folienschicht, c) kongruentes Überlagern der als Grautonbild in der Folienschicht vorliegenden Bildinformation mit dem Farbanteil derselben Bildinformation. Method for producing a record carrier, in particular a value or identification card with colored image information, characterized by the following steps: a) breaking down the image information into a light / dark component on the one hand and a color component on the other hand by means of electronic methods known per se, b) introducing the light / dark portion of the image information into a sensitized, transparent film layer by means of a controlled laser beam, c) congruent superimposition of the image information present as a gray tone image in the film layer with the color portion of the same image information. Verfahren nach Anspruch 16, dadurch gekennzeichnet, daß die Farbanteile der Bildinformation als Farbschicht aufgedruckt werden.A method according to claim 16, characterized in that the color components of the image information are printed on as a color layer. Verfahren nach Anspruch 16, dadurch gekennzeichnet, daß die Farbanteile der Bildinformation als Farbschicht im Tranferverfahren übertragen werden.A method according to claim 16, characterized in that the color components of the image information are transferred as a color layer in the transfer process. Verfahren nach Anspruch 18, dadurch gekennzeichnet, daß auf der Folienschicht (14) eine besondere farbaufnehmende Schicht (18) aufgebracht wird, die die im Transferverfahren übertragenen Farbstoffe aufnimmt.A method according to claim 18, characterized in that a special ink-absorbing layer (18) is applied to the film layer (14), which absorbs the dyes transferred in the transfer process. Verfahren nach Anspruch 19, dadurch gekennzeichnet, daß die Farbstoffe mittels eines Thermosublimationsverfahrens übertragen werden.Process according to claim 19, characterized in that the dyes are transferred by means of a thermal sublimation process. Verfahren nach Anspruch 19, dadurch gekennzeichnet, daß die Farbstoffe mittels eines Thermodiffusionsverfahrens übertragen werden.Process according to claim 19, characterized in that the dyes are transferred by means of a thermal diffusion process. Verfahren nach wenigstens einem der Ansprüche 18 - 21, dadurch gekennzeichnet, daß die thermische Energie für den Farbtransfer durch einen Laserstrahl geliefert wird.Method according to at least one of claims 18-21, characterized in that the thermal energy for the color transfer is supplied by a laser beam. Verfahren nach Anspruch 22, dadurch gekennzeichnet, daß die Einbringung des Grautonbildes in die Folienschicht (14) und der Farbtransfer mit einem und demselben Laserschreiber erfolgt.Method according to Claim 22, characterized in that the gray tone image is introduced into the film layer (14) and the color transfer is carried out with one and the same laser pen. Verfahren nach Anspruch 22 oder 23, dadurch gekennzeichnet, daß der Laserstrahl für den Farbtransfer weniger stark fokussiert ist, als beim Erzeugen des Grautonbildes.Method according to claim 22 or 23, characterized in that the laser beam for the color transfer is less focused than when the gray tone image is generated. Verfahren zur Herstellung eines mehrschichtigen Aufzeichnungsträgers, insbesondere einer Wert- oder Ausweiskarte, mit einer farbigen Bildinformation, gekennzeichnet, durch die folgenden Schritte: a) Zerlegen der Bildinformationen in einen Hell/Dunkel-Anteil einerseits und einen Farbanteil andererseits mittels an sich bekannter elektronischer Verfahren, b) Aufbringen des Hell/Dunkel-Anteils auf eine innere Kartenschicht, c) Abdecken der mit dem Hell/Dunkel-Anteil versehenen Kartenschicht mit einer im wesentlichen transparenten Folienschicht, d) kongruentes Überlagern der als Grautonbild unter der Folienschicht vorliegenden Bildinformation mit dem Farbanteil derselben Bildinformation, indem der Farbanteil mittels migrierender Farben in die sensibilisierte Folienschicht eingebracht wird. Method for producing a multi-layer record carrier, in particular a value or identification card, with colored image information, characterized by the following steps: a) decomposing the image information into a light / dark component on the one hand and a color component on the other hand by means of electronic methods known per se, b) applying the light / dark portion to an inner card layer, c) covering the card layer provided with the light / dark component with an essentially transparent film layer, d) congruent superimposition of the image information present as a gray tone image under the film layer with the color component of the same image information by introducing the color component into the sensitized film layer by means of migrating colors. Verfahren nach Anspruch 25, dadurch gekennzeichnet, daß das Grautonbild aufgedruckt wird.A method according to claim 25, characterized in that the gray tone image is printed.
EP92115710A 1991-10-18 1992-09-14 Recording media with coloured image, in particular credit or identity card Expired - Lifetime EP0537484B1 (en)

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DE4134539 1991-10-18
DE4134539A DE4134539A1 (en) 1991-10-18 1991-10-18 RECORD CARRIER WITH COLORED PICTURE INFORMATION, IN PARTICULAR VALUE OR ID CARD

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ATE173982T1 (en) 1998-12-15
DK0537484T3 (en) 1999-04-12
US5350198A (en) 1994-09-27
JP3426266B2 (en) 2003-07-14
DE59209577D1 (en) 1999-01-14
JPH05229289A (en) 1993-09-07
EP0537484B1 (en) 1998-12-02
DE4134539A1 (en) 1993-04-22
US5435599A (en) 1995-07-25
ES2123530T3 (en) 1999-01-16

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