EP3513984B2 - Security element with luminescence subject area - Google Patents

Security element with luminescence subject area Download PDF

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Publication number
EP3513984B2
EP3513984B2 EP19000016.6A EP19000016A EP3513984B2 EP 3513984 B2 EP3513984 B2 EP 3513984B2 EP 19000016 A EP19000016 A EP 19000016A EP 3513984 B2 EP3513984 B2 EP 3513984B2
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EP
European Patent Office
Prior art keywords
motif
region
luminescence
optically variable
security element
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.)
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Application number
EP19000016.6A
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German (de)
French (fr)
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EP3513984B1 (en
EP3513984A1 (en
Inventor
Gianluca Messa
Matthias Pfeiffer
Andreas Holzmeister
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Giesecke and Devrient Currency Technology GmbH
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Giesecke and Devrient Currency Technology GmbH
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Application filed by Giesecke and Devrient Currency Technology GmbH filed Critical Giesecke and Devrient Currency Technology GmbH
Publication of EP3513984A1 publication Critical patent/EP3513984A1/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
    • B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
    • B42D25/30—Identification or security features, e.g. for preventing forgery
    • B42D25/328—Diffraction gratings; Holograms
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
    • B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
    • B42D25/30—Identification or security features, e.g. for preventing forgery
    • B42D25/36—Identification or security features, e.g. for preventing forgery comprising special materials
    • B42D25/378—Special inks
    • B42D25/387—Special inks absorbing or reflecting ultraviolet light

Definitions

  • the invention relates to a security element with a luminescent motif area for securing security papers, valuable documents and other data carriers.
  • the invention also relates to a method for producing such a security element and to a data carrier equipped with such a security element.
  • Data carriers such as valuables or identification documents, but also other valuables, such as branded items, are often provided with security elements for security purposes, which allow the authenticity of the data carrier to be checked and which also serve as protection against unauthorized reproduction.
  • luminescent substances to secure valuables or identification documents.
  • the presence of the luminescent substances can then be checked, for example, using a UV lamp.
  • fluorescent mottled fibers can be incorporated into a security paper, which usually consist of short fibers provided with a fluorescent coating.
  • the mottled fibers are invisible under normal lighting, but under UV lighting they become clearly visible despite their small size due to their bright fluorescence, for example in red, green or blue.
  • the printing of true color luminescence images is also known, particularly in the passport area.
  • the implementation is usually carried out using ink-jet printing with special colors that are not visible under normal lighting and, when stimulated using UV light, show a color impression comparable to that of a classic image, for example a portrait of the passport holder.
  • ink-jet fluorescent inks are now relatively easily available, especially through online trading, which enables a counterfeiter to produce fake impressions.
  • Printing ink manufacturers also sometimes offer fluorescent inks that are intended for technical gadgets or brand protection.
  • EP 1 880 864 A2 shows a security element that, in addition to an optically variable motif that is visible in daylight, includes a motif that luminesces in UV light.
  • US 2017/0334235 A1 shows a security element with an optically variable layer, under which a luminescent layer is arranged, wherein the color tones of the luminescent layer can correspond to the two color tones of the optically variable layer.
  • US 2010/0072739 A1 shows a security element with two partial areas, each of which has different mixtures printed with an optically variable pigment and a luminescent pigment. The daylight motif area and the multicolored luminescence motif area are arranged congruently, i.e. completely overlapping.
  • the hue of the luminescence in one sub-area can correspond to one of the two hues of the optically variable pigments in the other sub-area. Proceeding from this, the invention is based on the object of providing a security element of the type mentioned at the outset with an attractive appearance and high security against forgery.
  • UV light and daylight are used in this application synonymously for light from the visible wavelength range (approximately 380 nm to 780 nm).
  • UV light or UV excitation refers to light from the ultraviolet wavelength range from approximately 100 nm to 380 nm.
  • the adaptation mentioned creates an interaction between the optically variable daylight motif area and the multicolored luminescence motif, which links two security features that are visible in different lighting situations and therefore increases the security effect of the security element.
  • the adaptation mentioned can be realized by adapting the optically variable daylight motif area with a color in at least one of its appearances to the at least one multicolored luminescence motif.
  • An adjustment in color means that the color tone of at least a portion of the daylight motif area matches the luminescence color tone of a portion of the at least one multicolored luminescence motif.
  • the optically variable daylight motif area has at least two areas with the same color tone in at least one of its appearances and the at least one multicolored luminescence motif. In one aspect, there is even the same color gradient between the two mentioned areas with the same color tone from the color tone of the first area to the color tone of the second area.
  • Recreating a color match between an optically variable area and a luminescent motif area represents a major challenge for a potential counterfeiter, especially when multiple colors, a mixed color of multiple primary colors, or even a color gradient must match.
  • the luminescence motif area is a true-color luminescence area that contains mixed colors of at least two, preferably three, luminescence primary colors.
  • the true color luminescence area contains mixed colors of luminescence green, luminescence red and luminescence blue.
  • the optically variable daylight motif area and the luminescence motif area are arranged adjacent to one another or spaced apart from one another on the security element.
  • the mutually adapted partial areas of the daylight motif area and the luminescence motif area can be arranged adjacent to one another, so that the adjustment, for example in color tone, is particularly noticeable and can be easily checked.
  • the optically variable daylight motif area and the luminescence motif area are arranged to overlap one another on the security element, with the daylight motif area and the luminescence motif area being matched in color to one another in the overlap area.
  • the optically variable daylight motif area and the luminescence motif area form motif parts that complement one another to form an overall motif. Especially when illuminated with daylight and UV light at the same time, the addition of the individual parts of the motif to an overall motif is very noticeable.
  • the adaptation already mentioned also provides an interaction between the two parts of the motif, which, in addition to complementing an overall motif, serves as an indicator of authenticity.
  • the optically variable daylight motif area preferably contains one or more elements selected from the group consisting of holograms, hologram-like diffraction structures, diffraction patterns, structures with a color-shifting effect, cinema shapes, structures with a microlens effect, and micro-optical display arrangements, in particular moire magnification arrangements and lenticular images.
  • the luminescence motif area can be designed to be optically non-variable, but in an advantageous development of the invention the luminescence motif area is also designed to be optically variable and therefore shows at least two different appearances after UV excitation from different excitation directions, or at least shows after UV excitation two different appearances from different viewing directions. Furthermore, the luminescence motif region can also show different appearances when excited with different excitation wavelengths (for example 254 nm and 365 nm).
  • the optically variable daylight motif area is adapted in at least one of its appearances to at least one of the appearances of the luminescence motif area.
  • the daylight motif area can of course also be advantageously adapted to all appearances of the luminescence motif area.
  • An optically variable luminescence motif area is advantageously part of a micro-optical display arrangement, in particular a Moire magnification arrangement or a lenticular image.
  • the optically variable daylight motif area and/or the luminescence motif area contain an IR-absorbing substance, preferably in the form of patterns, characters or a coding, such as a barcode or QR code.
  • the security element is advantageously a security thread, in particular a window security thread or a pendulum security thread, a tear thread, a security tape, a security strip, a patch or a label for application to a security paper, document of value or the like.
  • the security element can advantageously show different appearances in daylight and in UV light from opposite sides.
  • different luminescence motif areas are provided on the opposite sides of the security element, which are at least partially separated from one another by a UV blocker.
  • the invention also contains a data carrier with a security element of the type described.
  • the security element can in particular be arranged in a window area of the data carrier, for example above an opening or a transparent or translucent partial area of the data carrier.
  • the security element can advantageously show different appearances from opposite sides.
  • the data carrier can in particular be a document of value, such as a banknote, in particular a paper banknote, a polymer banknote or a film composite banknote, a share, a bond, a certificate, a voucher, a check, a high-quality admission ticket, but also an ID card , such as a credit card, a debit card, a cash card, an authorization card, an ID card or a passport personalization page.
  • a banknote in particular a paper banknote, a polymer banknote or a film composite banknote, a share, a bond, a certificate, a voucher, a check, a high-quality admission ticket
  • ID card such as a credit card, a debit card, a cash card, an authorization card, an ID card or a passport personalization page.
  • FIG. 1 shows schematically a banknote 10 with a security element 12 according to the invention, the visual impression of which is shown under different lighting and viewing conditions
  • Figures 2 and 3 is shown in more detail.
  • Figure 2 specifically shows the appearance of the security element 12 when illuminated with only one type of light, either light 20 in the visible wavelength range (also referred to as daylight in this description) or UV light 22 Fig. 2(a) the appearance of the security element 12 in daylight 20 when viewed from an angle, Fig. 2(b) the appearance in daylight when viewed vertically and Fig. 2(c) the appearance of the security element 12 after UV excitation 22, which is essentially independent of the viewing direction.
  • Figure 3 shows the appearance of the security element 12 when simultaneously illuminated with both types of light 20, 22, where Fig. 3(a) the appearance when viewed from an angle and Fig. 3(b) the appearance when viewed vertically.
  • a security element 12 illustrates that contains two non-overlapping but adjacent motif areas 14, 16, which in the exemplary embodiment are defined by the upper and lower half of the arch of the in Fig. 1 shown arch motif are formed.
  • the motif areas 14, 16 can also be arranged at a distance from one another, for example.
  • the first motif area represents an optically variable daylight motif area 14, which shows two different appearances in visible light 20 (daylight) from different viewing directions.
  • the motif area 14 appears with the color magenta (M) when viewed vertically, as in Fig. 2(b) shown, and when viewed from an angle with the color green (G), as in Fig. 2(a) shown.
  • the second motif area represents a luminescence motif area 16, which is not visible in pure daylight lighting, and in the Figures 2(a) and 2(b) is therefore only shown with a dashed outline.
  • UV excitation 22 shows the luminescence motif area 16 a multi-colored luminescence motif, in the exemplary embodiment Figures 2 and 3
  • the luminescent motif luminesces with the luminescent colors magenta (M) and blue (B), respectively.
  • the luminescent color magenta is a mixed color that is created by additive color mixing of luminescent red and luminescent blue.
  • the daylight motif area 14 is hardly or not visible and in the Fig. 2(c) therefore only shown with a dashed outline.
  • the luminescence motif of the color areas 16-1, 16-2 does not change when the security element 12 is tilted, but rather appears essentially the same when viewed vertically and when viewed at an angle or illuminated Fig. 2(c) illustrated color impression.
  • a special feature of the optically variable daylight motif area 14 is its appearance when vertical Viewing adapted to the luminescence motif of the color areas 16-1, 16-2, the motif area 14 shows the same shade of magenta (M) as the partial area 16-1 of the luminescence motif. Reproducing such a color match between an optically variable area 14 and a luminescence area 16 represents a great challenge for a potential counterfeiter, especially if a mixed color matches, as here, or if several colors or even color gradients match, as shown in embodiments described further below.
  • M magenta
  • the color match can be checked by alternating illumination of the security element 12 with daylight 20 and UV light 22, but can in particular also be queried by simultaneous illumination with daylight and UV light, as in Fig. 3 illustrated.
  • the in Fig. 3(a) shown oblique view of the daylight motif area 14 with the color green (G) and the luminescence area 16 in the first color area 16-1 with the color magenta (M) and in the second color area 16-2 with the color blue (B).
  • the optically variable motif area 14 changes its appearance and then appears like the first color area 16-1 of the luminescence area with the color magenta (M).
  • the color matching of areas 14 and 16-1 is immediately apparent to a viewer and can therefore be easily checked.
  • the adjacent arrangement of the partial areas 14, 16 results in a visually easily recognizable and memorable completion of the partial motifs 14 and 16 to form an overall motif.
  • FIG. 4(b) When viewed vertically, the optically variable daylight motif area 14 appears in visible light in a first color area 14-1 with the color magenta (M) and in a second color area 14-2 with the color blue (B).
  • M color magenta
  • B color blue
  • the appearance of the area 14 changes due to the color shift effect from magenta to green and from blue to magenta, so that the first color area 14-1 has the color green (G) when viewed at an angle in daylight and the second color area 14-2 has the color tone (G).
  • the color magenta (M) appears.
  • the second motif area 16 is like that Figures 2 and 3 already described and shows upon UV excitation 22 a multicolored luminescence motif with a first color range 16-1 in the luminescence color magenta (M) and a second color range 16-2 in the luminescence color blue (B).
  • the luminescence motif of the color areas 16-1, 16-2 does not change when the security element 12 is tilted and appears essentially the same when viewed vertically and obliquely or illuminated Fig. 4(c) illustrated color impression.
  • the optically variable daylight motif area 14 is adapted to the luminescence motif in its two appearances, each with at least one color area. Given the appearance when viewed from an angle ( Figs. 4(a) and 4(c) ) namely, both the color range 14-2 of the daylight motif area 14 and the color area 16-1 of the luminescence motif area 16 appear the color magenta (M), so that there is an adaptation in one color area.
  • M color magenta
  • both the color range 14-1 of the daylight motif area 14 and the color range 16-1 of the luminescence motif area 16 appear with the color magenta (M)
  • both the color range 14-2 of the daylight motif area 14 appear the color range 16-2 of the luminescence motif area 16 with the color blue (B).
  • the color matches mentioned can be checked by alternating lighting with daylight 20 and UV light 22, can be checked with reference to Fig. 5 but can also be tested by simultaneous lighting with daylight and UV light.
  • the in Fig. 5(a) In the oblique viewing direction shown, the color areas 14-2 and 16-1 are simultaneously in the color magenta (M).
  • the color areas 14-1 and 16-1 appear simultaneously in the color magenta (M) and, on the other hand, the color areas 14-2 and 16-2 appear simultaneously in the color blue (B).
  • FIGs 6 and 7 illustrate the use of the basic principle described in a more complex security element, namely a wide security strip 30 for application to a banknote 32, as in the daylight view of Fig. 6 illustrated.
  • the security strip 30 is in Fig. 7 presented in more detail, where there Fig. 7(a) the appearance of the security strip 30 only in daylight 20, Fig. 7(b) the appearance of the security strip 30 only in UV light 22 and Fig. 7(c) the appearance of the security strip 30 when illuminated with both types of light 20, 22 shows.
  • Figure 7(d) finally illustrates the appearance of an optional development of the security strip 30 in the IR light 24.
  • the security strip 30 contains an optically variable daylight motif area 40 consisting of several partial areas 42, 44, the partial areas 42, 44 each containing a hologram 46 which, when viewed vertically, has a color gradient from a light blue color area 46-1 to a dark blue color area 46 -2 shows.
  • the color gradient is illustrated in the figures as a four-stage progression, but in practice it can of course contain more stages or even be continuous.
  • the security strip 30 further contains a luminescence motif area 50, which after UV excitation 22 shows a multicolored luminescence motif, which also consists of several partial areas 52, 54, 56.
  • the partial areas represent a true color portrait 52 against the background of a blue sky 54 and a letter sequence 56.
  • the sky background 54 shows a color gradient in the UV light 22 from a light blue color area 54-1 to a dark blue color area 54-2, wherein the hues of the color gradient and the color end points 54-1, 54-2 correspond to the hues of the color gradients and the color end points 46-1, 46-2 in the holograms 46 of the daylight motif area 40.
  • the color match between the color gradient in the holograms 46 and the color gradient in the luminescent sky background 54 can now be checked when viewed vertically by alternating illumination with daylight 20 and UV light 22; it can be checked with reference to Fig. 7(c) However, it can also be checked by simultaneously illuminating the security strip 30 with daylight and UV light.
  • the security features described in the visible and UV spectral range can be supplemented by further authenticity features.
  • the partial areas 40, 50 can, for example, additionally contain an IR-absorbing substance 62, which is designed in a partial area in the form of a code, for example a QR code 60.
  • a code for example a QR code 60.
  • the change in the visual appearance of the security element when changing from daylight viewing to viewing under UV excitation can be combined with an optically variable luminescence motif.
  • an optically variable luminescence motif can be obtained, analogous to conventional lens tilt images, by arranging a regular arrangement of parallel cylindrical lenses 70 at a distance from a luminescence motif area 72, which is alternately divided into a plurality of parallel luminescent strips 74A, 74B.
  • the strips 74A, 74B and the cylindrical lenses 70 are coordinated with one another in such a way that after UV excitation only the stripes 74A are visible from a first viewing direction and only the stripes 74B are visible from a second viewing direction and together they each produce a desired luminescence image.
  • Figure 9 illustrates in (a) to (c) some possible visual appearances of such an optically variable luminescence motif when changing the viewing direction (arrow 90).
  • Fig. 9(a) When exposed to UV excitation from a first viewing direction, the illustrated luminescence region 80 appears in a first color, for example red (R), while from a second viewing direction it appears in a second color, for example yellow (Y).
  • R red
  • Y yellow
  • the luminescence area represents a two-color pattern of two parallel stripes 82, 84, the luminescence colors of which exchange one another when the viewing direction changes 90. From a first viewing direction, for example after UV excitation, the strips 82, 84 show the color sequence red-yellow (left part of the image), while from a second viewing direction they show the color sequence yellow-red (right part of the image).
  • An additional motif 88 appears or disappears in the luminescence area 86 when tilting 90.
  • the luminescence area 86 appears uniformly red (R), while from a second viewing direction additional coat of arms motifs 88 appear in yellow (Y) against the red background are visible.
  • Such optically variable luminescence effects cannot only be achieved with lens arrangements Fig. 8 , but also, for example, with prism arrangements or with blind grids, in which case the grid elements can be formed in particular from opaque or transparent UV blockers.
  • luminescent microimages of the same or different colors are used in the context of the present application. In daylight, the microimages can either be invisible, for example transparent or have the same body color as the background, or they can be visible and have the same or different colors.
  • Figure 10 shows, by way of example, different motif images 100 of such moiré enlargement arrangements, as can be provided, for example, in a security thread as part of a security element described above.
  • the regularly arranged microimages are each designed in the form of a star for illustration, but in practice they can have any other shape.
  • the Figures 10(a) to 10(d) The appearance of the motif images in daylight 20 is shown in each case, and the appearance in UV light 22 is shown in the right half of the image.
  • the microimages 102 are initially designed so that they all have the same color tone 104-F in daylight 20, while the microimages 102 glow in different luminescence colors 106-A, 106-B, 106-C, 106-D in UV light 22.
  • the moiré effect results in a dynamic movement effect when the security element is tilted when viewed in both daylight 20 and UV light 22, with the moving, moiré-enlarged stars appearing monochromatic in daylight 20, but with different colors in UV light 22 Luminescent colors 106-A to 106-D light up.
  • the microimages 102 are transparent in visible light 20 and their position is therefore only shown in dashed lines in the figure, while in UV light 22 they glow in different luminescence colors 106-A, 106-B, 106-C, 106-D.
  • the motif image 100 thus produces no recognizable image and no movement effect, while in UV light 22, when the security element is tilted, a dynamic movement effect with moving, moiré-enlarged stars shining in the luminescent colors 106-A to 106-D is visible becomes.
  • the microimages 102 are designed so that they all have the same color tone 104-F in daylight 20, and also all shine in the same color tone 106-G in UV light 22.
  • the common daylight color 104-F and the common luminescence color 106-G can be the same or different.
  • the moiré effect results in a monochrome dynamic movement effect in both daylight 20 and UV light 22 when the security element is tilted.
  • the exemplary embodiment of the Fig. 10(d) finally shows a design in which the microimages 102 are designed so that they all have the same color tone 106-G in UV light 22, while in daylight 20 they have different colors 104-A, 104-B, 104-C, 104 -D appear.
  • the moiré effect results in a dynamic movement effect in both daylight 20 and UV light 22 when the security element is tilted, with the moving, moiré-enlarged stars shining in one color in UV light 22, but with different colors 104 in daylight 20 -A to 104-D appear.

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

Description

Die Erfindung betrifft ein Sicherheitselement mit einem Lumineszenz-Motivbereich zur Absicherung von Sicherheitspapieren, Wertdokumenten und anderen Datenträgern. Die Erfindung betrifft auch ein Verfahren zur Herstellung eines solchen Sicherheitselements sowie einen mit einem solchen Sicherheitselement ausgestatteten Datenträger.The invention relates to a security element with a luminescent motif area for securing security papers, valuable documents and other data carriers. The invention also relates to a method for producing such a security element and to a data carrier equipped with such a security element.

Datenträger, wie Wert- oder Ausweisdokumente, aber auch andere Wertgegenstände, wie etwa Markenartikel, werden zur Absicherung oft mit Sicherheitselementen versehen, die eine Überprüfung der Echtheit des Datenträgers gestatten und die zugleich als Schutz vor unerlaubter Reproduktion dienen.Data carriers, such as valuables or identification documents, but also other valuables, such as branded items, are often provided with security elements for security purposes, which allow the authenticity of the data carrier to be checked and which also serve as protection against unauthorized reproduction.

In diesem Zusammenhang ist es seit längerem bekannt, Lumineszenzstoffe zur Absicherung von Wert- oder Ausweisdokumenten einzusetzen. Das Vorliegen der Lumineszenzstoffe kann dann beispielsweise mit Hilfe einer UV-Lampe geprüft werden. Beispielsweise können in ein Sicherheitspapier fluoreszierende Melierfasern eingebracht sein, welche üblicherweise aus kurzen, mit einer fluoreszierenden Beschichtung versehenen Fasern bestehen. Bei normaler Beleuchtung sind die Melierfasern unsichtbar, unter UV-Beleuchtung treten sie jedoch durch ihre helle Fluoreszenz, beispielsweise in Rot, Grün oder Blau, trotz ihrer geringen Größe deutlich in Erscheinung. Insbesondere im Pass-Bereich ist auch der Druck von Echtfarben-Lumineszenzbildern bekannt. Die Umsetzung erfolgt dabei in der Regel im Ink-Jet-Druck mit speziellen Farben, welche bei normaler Beleuchtung nicht sichtbar sind und nach Anregung mittels UV-Licht einen vergleichbaren Farbeindruck wie ein klassisches Bild, beispielsweise ein Portrait des Passinhabers, zeigen.In this context, it has long been known to use luminescent substances to secure valuables or identification documents. The presence of the luminescent substances can then be checked, for example, using a UV lamp. For example, fluorescent mottled fibers can be incorporated into a security paper, which usually consist of short fibers provided with a fluorescent coating. The mottled fibers are invisible under normal lighting, but under UV lighting they become clearly visible despite their small size due to their bright fluorescence, for example in red, green or blue. The printing of true color luminescence images is also known, particularly in the passport area. The implementation is usually carried out using ink-jet printing with special colors that are not visible under normal lighting and, when stimulated using UV light, show a color impression comparable to that of a classic image, for example a portrait of the passport holder.

Allerdings sind inzwischen vor allem durch den Online-Handel Ink-Jet-Fluoreszenzfarben relativ leicht verfügbar, die es einem Fälscher ermöglichen, Eindrucksfälschungen herzustellen. Auch bieten Druckfarbenhersteller teilweise Fluoreszenzfarben an, die für technische Spielereien oder den Markenschutz bestimmt sind.However, ink-jet fluorescent inks are now relatively easily available, especially through online trading, which enables a counterfeiter to produce fake impressions. Printing ink manufacturers also sometimes offer fluorescent inks that are intended for technical gadgets or brand protection.

EP 1 880 864 A2 zeigt ein Sicherheitselement, das neben einem im Tageslicht sichtbaren, optisch variablen Motiv ein im UV-Licht lumineszierendes Motiv umfasst. US 2017/0334235 A1 zeigt ein Sicherheitselement mit einer optisch variablen Schicht, unter welcher eine Lumineszenzschicht angeordnet ist, wobei die Farbtöne der Lumineszenzschicht den beiden Farbtönen der optisch variablen Schicht entsprechen können. US 2010/0072739 A1 zeigt ein Sicherheitselement mit zwei Teilbereichen, in denen jeweils unterschiedliche Mischungen mit einem optisch variablen Pigment und einem Lumineszenzpigment aufgedruckt sind. Der Tageslichtmotivbereich und der mehrfarbige Lumineszenzmotivbereich sind deckungsgleich, also vollständig überlappend, angeordnet. Der Farbton der Lumineszenz in einem Teilbereich kann einem der beiden Farbtöne der optisch variablen Pigmente im anderen Teilbereich entsprechen. Davon ausgehend liegt der Erfindung die Aufgabe zugrunde, ein Sicherheitselement der eingangs genannten Art mit einem attraktiven Erscheinungsbild und hoher Fälschungssicherheit anzugeben. EP 1 880 864 A2 shows a security element that, in addition to an optically variable motif that is visible in daylight, includes a motif that luminesces in UV light. US 2017/0334235 A1 shows a security element with an optically variable layer, under which a luminescent layer is arranged, wherein the color tones of the luminescent layer can correspond to the two color tones of the optically variable layer. US 2010/0072739 A1 shows a security element with two partial areas, each of which has different mixtures printed with an optically variable pigment and a luminescent pigment. The daylight motif area and the multicolored luminescence motif area are arranged congruently, i.e. completely overlapping. The hue of the luminescence in one sub-area can correspond to one of the two hues of the optically variable pigments in the other sub-area. Proceeding from this, the invention is based on the object of providing a security element of the type mentioned at the outset with an attractive appearance and high security against forgery.

Diese Aufgabe wird durch die Merkmale der unabhängigen Ansprüche gelöst. Weiterbildungen der Erfindung sind Gegenstand der abhängigen Ansprüche.This task is solved by the features of the independent claims. Further developments of the invention are the subject of the dependent claims.

Gemäß der Erfindung umfasst das Sicherheitselement einen optisch variablen Tageslicht-Motivbereich, der im sichtbaren Licht aus unterschiedlichen Betrachtungsrichtungen zumindest zwei unterschiedliche Erscheinungsbilder zeigt, und einen Lumineszenz-Motivbereich, der nach UV-Anregung zumindest ein mehrfarbiges Lumineszenzmotiv zeigt. Der optisch variable Tageslicht-Motivbereich ist in zumindest einem seiner Erscheinungsbilder an das zumindest eine mehrfarbige Lumineszenzmotiv angepasst, nämlich

  • mindestens einen Bereich mit demselben Farbverlauf aufweist, wie ein Bereich des mehrfarbigen Lumineszenzmotivs, wobei der optisch variable Tageslicht-Motivbereich in zumindest einem seiner Erscheinungsbilder und das zumindest eine mehrfarbige Lumineszenzmotiv mindestens zwei Bereiche mit demselben Farbton aufweisen, wobei zwischen den zwei genannten Bereichen mit demselben Farbton jeweils derselbe Farbverlauf vom Farbton des ersten Bereichs zum Farbton des zweiten Bereichs vorliegt; oder
  • mindestens einen Bereich mit demselben Farbton aufweist, wie ein Bereich des mehrfarbigen Lumineszenzmotivs, wobei
    • der Lumineszenz-Motivbereich ein Echtfarb-Lumineszenzbereich ist, der Mischfarben aus mindestens zwei Lumineszenz-Grundfarben enthält, oder
    • der optisch variable Tageslicht-Motivbereich und der Lumineszenz-Motivbereich aneinander angrenzend oder beabstandet auf dem Sicherheitselement angeordnet sind, oder
    • der optisch variable Tageslicht-Motivbereich und der Lumineszenz-Motivbereich einander zu einem Gesamtmotiv ergänzende Motivteile bilden.
According to the invention, the security element comprises an optically variable daylight motif area, which shows at least two different appearances in visible light from different viewing directions, and a luminescence motif area, which shows at least one multi-colored luminescence motif after UV excitation. The optically variable daylight motif area is adapted in at least one of its appearances to the at least one multicolored luminescence motif, namely
  • has at least one area with the same color gradient as an area of the multicolored luminescence motif, the optically variable daylight motif area having at least one of its appearances and the at least one multicolored luminescence motif having at least two areas with the same color tone, with the same color tone between the two mentioned areas In each case the same color gradient is present from the color tone of the first area to the color tone of the second area; or
  • has at least one area with the same color tone as an area of the multicolored luminescent motif, wherein
    • the luminescence motif area is a true color luminescence area that contains mixed colors of at least two luminescence primary colors, or
    • the optically variable daylight motif area and the luminescence motif area are arranged adjacent or spaced apart on the security element, or
    • the optically variable daylight motif area and the luminescence motif area form motif parts that complement each other to form an overall motif.

Die Begriffe sichtbares Licht und Tageslicht werden in dieser Anmeldung synonym für Licht aus dem sichtbaren Wellenlängenbereich (etwa 380 nm bis 780 nm) verwendet. UV-Licht oder UV-Anregung bezeichnet Licht aus dem ultravioletten Wellenlängenbereich von etwa 100 nm bis 380 nm.The terms visible light and daylight are used in this application synonymously for light from the visible wavelength range (approximately 380 nm to 780 nm). UV light or UV excitation refers to light from the ultraviolet wavelength range from approximately 100 nm to 380 nm.

Durch die genannte Anpassung wird eine Wechselwirkung zwischen dem optisch variablen Tageslicht-Motivbereich und dem mehrfarbigen Lumineszenzmotiv geschaffen, die zwei in verschiedenen Beleuchtungssituationen sichtbare Sicherheitsmerkmale miteinander verknüpft und daher die Absicherungswirkung des Sicherheitselements erhöht.The adaptation mentioned creates an interaction between the optically variable daylight motif area and the multicolored luminescence motif, which links two security features that are visible in different lighting situations and therefore increases the security effect of the security element.

Die genannte Anpassung kann dadurch verwirklicht sein, dass der optisch variable Tageslicht-Motivbereich mit einer Farbe in zumindest einem seiner Erscheinungsbilder an das zumindest eine mehrfarbige Lumineszenzmotiv angepasst ist. Eine Anpassung in der Farbe bedeutet dabei, dass der Farbton zumindest eines Teilbereichs des Tageslicht-Motivbereichs mit dem LumineszenzFarbton eines Teilbereichs des zumindest einen mehrfarbigen Lumineszenzmotivs übereinstimmt.The adaptation mentioned can be realized by adapting the optically variable daylight motif area with a color in at least one of its appearances to the at least one multicolored luminescence motif. An adjustment in color means that the color tone of at least a portion of the daylight motif area matches the luminescence color tone of a portion of the at least one multicolored luminescence motif.

Es ist dabei vorgesehen, dass der optisch variable Tageslicht-Motivbereich in zumindest einem seiner Erscheinungsbilder und das zumindest eine mehrfarbige Lumineszenzmotiv mindestens zwei Bereiche mit demselben Farbton aufweisen. In einem Aspekt liegt zwischen den zwei genannten Bereichen mit demselben Farbton sogar jeweils derselbe Farbverlauf vom Farbton des ersten Bereichs zum Farbton des zweiten Bereichs vor.It is provided that the optically variable daylight motif area has at least two areas with the same color tone in at least one of its appearances and the at least one multicolored luminescence motif. In one aspect, there is even the same color gradient between the two mentioned areas with the same color tone from the color tone of the first area to the color tone of the second area.

Die Nachstellung einer Farbübereinstimmung zwischen einem optisch variablen Bereich und einem Lumineszenz-Motivbereich stellt eine große Herausforderung für einen potentiellen Fälscher dar, insbesondere wenn mehrere Farben, eine Mischfarbe aus mehreren Grundfarben oder sogar ein Farbverlauf übereinstimmen müssen.Recreating a color match between an optically variable area and a luminescent motif area represents a major challenge for a potential counterfeiter, especially when multiple colors, a mixed color of multiple primary colors, or even a color gradient must match.

Der Lumineszenz-Motivbereich ist in einem weiteren Aspekt ein Echtfarb-Lumineszenzbereich, der Mischfarben aus mindestens zwei, vorzugsweise drei Lumineszenz-Grundfarben enthält. Insbesondere enthält der Echtfarb-Lumineszenzbereich Mischfarben aus Lumineszenzgrün, Lumineszenzrot und Lumineszenzblau.In a further aspect, the luminescence motif area is a true-color luminescence area that contains mixed colors of at least two, preferably three, luminescence primary colors. In particular, the true color luminescence area contains mixed colors of luminescence green, luminescence red and luminescence blue.

Der optisch variable Tageslicht-Motivbereich und der Lumineszenz-Motivbereich sind in einem anderen Aspekt aneinander angrenzend oder beabstandet voneinander auf dem Sicherheitselement angeordnet. Insbesondere können die aneinander angepassten Teilbereiche des Tageslicht-Motivbereichs und des Lumineszenz-Motivbereichs aneinander angrenzend angeordnet sein, so dass die Anpassung, beispielsweise im Farbton, besonders auffällig ist und leicht geprüft werden kann.In another aspect, the optically variable daylight motif area and the luminescence motif area are arranged adjacent to one another or spaced apart from one another on the security element. In particular, the mutually adapted partial areas of the daylight motif area and the luminescence motif area can be arranged adjacent to one another, so that the adjustment, for example in color tone, is particularly noticeable and can be easily checked.

In einer anderen, ebenfalls vorteilhaften Ausgestaltung sind der optisch variable Tageslicht-Motivbereich und der Lumineszenz-Motivbereich einander überlappend auf dem Sicherheitselement angeordnet, wobei der Tageslicht-Motivbereich und der Lumineszenz-Motivbereich im Überlappungsbereich in ihrer Farbe aneinander angepasst sind.In another, also advantageous embodiment, the optically variable daylight motif area and the luminescence motif area are arranged to overlap one another on the security element, with the daylight motif area and the luminescence motif area being matched in color to one another in the overlap area.

Der optisch variable Tageslicht-Motivbereich und der Lumineszenz-Motivbereich bilden in einem noch anderen Aspekt einander zu einem Gesamtmotiv ergänzende Motivteile. Insbesondere bei gleichzeitiger Beleuchtung mit Tageslicht und UV-Licht ist die Ergänzung der einzelnen Motivteile zu einem Gesamtmotiv sehr auffällig. Die bereits genannte Anpassung stellt zusätzlich eine Wechselwirkung zwischen den beiden Motivteilen bereit, die neben der Ergänzung zu einem Gesamtmotiv als Echtheitskennzeichen dient.In yet another aspect, the optically variable daylight motif area and the luminescence motif area form motif parts that complement one another to form an overall motif. Especially when illuminated with daylight and UV light at the same time, the addition of the individual parts of the motif to an overall motif is very noticeable. The adaptation already mentioned also provides an interaction between the two parts of the motif, which, in addition to complementing an overall motif, serves as an indicator of authenticity.

Der optisch variable Tageslicht-Motivbereich enthält bevorzugt ein oder mehrere Elemente ausgewählt aus der Gruppe bestehend aus Hologrammen, hologrammähnlichen Beugungsstrukturen, Beugungsmustern, Strukturen mit Farbkippeffekt, Kinoformen, Strukturen mit einem Mikrolinseneffekt, und mikrooptischen Darstellungsanordnungen, insbesondere Moire-Vergrößerungsanordnungen und Linsenrasterbildern.The optically variable daylight motif area preferably contains one or more elements selected from the group consisting of holograms, hologram-like diffraction structures, diffraction patterns, structures with a color-shifting effect, cinema shapes, structures with a microlens effect, and micro-optical display arrangements, in particular moire magnification arrangements and lenticular images.

Der Lumineszenz-Motivbereich kann optisch nicht-variabel ausgebildet sein, in einer vorteilhaften Weiterbildung der Erfindung ist der Lumineszenz-Motivbereich allerdings ebenfalls optisch variabel ausgebildet und zeigt daher nach UV-Anregung aus unterschiedlichen Anregungsrichtungen zumindest zwei unterschiedliche Erscheinungsbilder, oder zeigt nach UV-Anregung zumindest zwei unterschiedliche Erscheinungsbilder aus unterschiedlichen Betrachtungsrichtungen. Weiter kann der Lumineszenz-Motivbereich auch bei Anregung mit unterschiedlichen Anregungswellenlängen (beispielsweise 254 nm und 365 nm) unterschiedliche Erscheinungsbilder zeigen.The luminescence motif area can be designed to be optically non-variable, but in an advantageous development of the invention the luminescence motif area is also designed to be optically variable and therefore shows at least two different appearances after UV excitation from different excitation directions, or at least shows after UV excitation two different appearances from different viewing directions. Furthermore, the luminescence motif region can also show different appearances when excited with different excitation wavelengths (for example 254 nm and 365 nm).

Zeigt der Lumineszenz-Motivbereich unterschiedliche Erscheinungsbilder, so ist erfindungsgemäß der optisch variable Tageslicht-Motivbereich in zumindest einem seiner Erscheinungsbilder an wenigstens eines der Erscheinungsbilder des Lumineszenz-Motivbereichs angepasst. Der Tageslicht-Motivbereich kann natürlich vorteilhaft auch an alle Erscheinungsbilder des Lumineszenz-Motivbereichs angepasst sein.If the luminescence motif area shows different appearances, then according to the invention the optically variable daylight motif area is adapted in at least one of its appearances to at least one of the appearances of the luminescence motif area. The daylight motif area can of course also be advantageously adapted to all appearances of the luminescence motif area.

Ein optisch variabel ausgebildeter Lumineszenz-Motivbereich ist mit Vorteil Teil einer mikrooptischen Darstellungsanordnung, insbesondere einer Moire-Vergrößerungsanordnung oder eines Linsenrasterbilds.An optically variable luminescence motif area is advantageously part of a micro-optical display arrangement, in particular a Moire magnification arrangement or a lenticular image.

In einer Weiterbildung der Erfindung ist vorgesehen, dass der optisch variable Tageslicht-Motivbereich und/oder der Lumineszenz-Motivbereich eine IR-absorbierende Substanz enthalten, vorzugsweise im Form von Mustern, Zeichen oder einer Codierung, wie einem Barcode oder QR-Code.In a further development of the invention it is provided that the optically variable daylight motif area and/or the luminescence motif area contain an IR-absorbing substance, preferably in the form of patterns, characters or a coding, such as a barcode or QR code.

Das Sicherheitselement ist mit Vorteil ein Sicherheitsfaden, insbesondere ein Fenstersicherheitsfaden oder ein Pendelsicherheitsfaden, ein Aufreißfaden, ein Sicherheitsband, ein Sicherheitsstreifen, ein Patch oder ein Etikett zum Aufbringen auf ein Sicherheitspapier, Wertdokument oder dergleichen.The security element is advantageously a security thread, in particular a window security thread or a pendulum security thread, a tear thread, a security tape, a security strip, a patch or a label for application to a security paper, document of value or the like.

Weiter kann das Sicherheitselement mit Vorteil von gegenüberliegenden Seiten unterschiedliche Erscheinungsbilder im Tageslicht und im UV-Licht zeigen. Dazu sind insbesondere unterschiedliche Lumineszenz-Motivbereiche auf den gegenüberliegenden Seiten des Sicherheitselements vorgesehen, die zumindest teilweise durch einen UV-Blocker voneinander getrennt sind.Furthermore, the security element can advantageously show different appearances in daylight and in UV light from opposite sides. For this purpose, in particular, different luminescence motif areas are provided on the opposite sides of the security element, which are at least partially separated from one another by a UV blocker.

Die Erfindung enthält auch einen Datenträger mit einem Sicherheitselement der beschriebenen Art. Das Sicherheitselement kann dabei insbesondere in einem Fensterbereich des Datenträgers angeordnet sein, beispielsweise über einer Öffnung oder einem transparenten oder transluzenten Teilbereich des Datenträgers. In diesem Fall kann das Sicherheitselement mit Vorteil von gegenüberliegenden Seiten unterschiedliche Erscheinungsbilder zeigen.The invention also contains a data carrier with a security element of the type described. The security element can in particular be arranged in a window area of the data carrier, for example above an opening or a transparent or translucent partial area of the data carrier. In this case, the security element can advantageously show different appearances from opposite sides.

Bei dem Datenträger kann es sich insbesondere um ein Wertdokument, wie eine Banknote, insbesondere eine Papierbanknote, eine Polymerbanknote oder eine Folienverbundbanknote, um eine Aktie, eine Anleihe, eine Urkunde, einen Gutschein, einen Scheck, eine hochwertige Eintrittskarte, aber auch um eine Ausweiskarte, wie etwa eine Kreditkarte, eine Bankkarte, eine Barzahlungskarte, eine Berechtigungskarte, einen Personalausweis oder eine Passpersonalisierungsseite handeln.The data carrier can in particular be a document of value, such as a banknote, in particular a paper banknote, a polymer banknote or a film composite banknote, a share, a bond, a certificate, a voucher, a check, a high-quality admission ticket, but also an ID card , such as a credit card, a debit card, a cash card, an authorization card, an ID card or a passport personalization page.

Die Erfindung enthält schließlich auch ein Verfahren nach Anspruch 16 bis 19.Finally, the invention also contains a method according to claims 16 to 19.

Weitere Ausführungsbeispiele sowie Vorteile der Erfindung werden nachfolgend anhand der Figuren erläutert, bei deren Darstellung auf eine maßstabs- und proportionsgetreue Wiedergabe verzichtet wurde, um die Anschaulichkeit zu erhöhen.Further exemplary embodiments and advantages of the invention are explained below with reference to the figures, which are not reproduced to scale and proportions in order to increase clarity.

Es zeigen:

Fig. 1
schematisch eine Banknote mit einem erfindungsgemäßen Sicherheitselement,
Fig. 2
das Erscheinungsbild des Sicherheitselements der Fig. 1 bei Beleuchtung mit nur einer Lichtsorte, in (a) im Tageslicht bei schräger Betrachtung, in (b) im Tageslicht bei senkrechter Betrachtung und in (c) bei UV-Anregung bei senkrechter oder schräger Betrachtung,
Fig. 3
das Erscheinungsbild des Sicherheitselements der Fig. 1 bei gleichzeitiger Beleuchtung mit Tageslicht und UV-Licht, in (a) bei schräger Betrachtung und in (b) bei senkrechter Betrachtung,
Fig. 4
das Erscheinungsbild eines Sicherheitselements nach einem weiteren Ausführungsbeispiel der Erfindung, in (a) im Tageslicht bei schräger Betrachtung, in (b) im Tageslicht bei senkrechter Betrachtung und in (c) bei UV-Anregung bei senkrechter oder schräger Betrachtung,
Fig. 5
das Erscheinungsbild des Sicherheitselements der Fig. 4 bei gleichzeitiger Beleuchtung mit Tageslicht und UV-Licht, in (a) bei schräger Betrachtung und in (b) bei senkrechter Betrachtung,
Fig. 6
eine Banknote mit einem Sicherheitsstreifen nach einem weiteren Ausführungsbeispiel der Erfindung in Tageslichtansicht,
Fig. 7
das Erscheinungsbild des Sicherheitsstreifens der Fig. 6 bei verschiedenen Beleuchtungsbedingungen, in (a) nur im Tageslicht, in (b) nur im UV-Licht, in (c) bei gleichzeitiger Beleuchtung mit Tageslicht und UV-Licht, und in (d) im Infrarot-Licht,
Fig. 8
eine Anordnung zur Erzeugung eines optisch variablen Lumineszenzmotivs,
Fig. 9
in (a) bis (c) beispielhaft visuelle Erscheinungsbilder eines optisch variablen Lumineszenzmotivs beim Wechsel der Betrachtungsrichtung, und
Fig. 10
in (a) bis (d) unterschiedliche lumineszierende Motivbilder von Moiré-Vergrößerungsanordnungen, wobei in der linken Bildhälfte jeweils das Erscheinungsbild im Tageslicht und in der rechten Bildhälfte das Erscheinungsbild im UV-Licht gezeigt ist.
Show it:
Fig. 1
schematically a banknote with a security element according to the invention,
Fig. 2
the appearance of the security element Fig. 1 when illuminated with only one type of light, in (a) in daylight when viewed at an angle, in (b) in daylight when viewed vertically and in (c) with UV excitation when viewed vertically or obliquely,
Fig. 3
the appearance of the security element Fig. 1 with simultaneous illumination with daylight and UV light, in (a) when viewed at an angle and in (b) when viewed vertically,
Fig. 4
the appearance of a security element according to a further exemplary embodiment of the invention, in (a) in daylight when viewed at an angle, in (b) in daylight when viewed vertically and in (c) under UV excitation when viewed vertically or at an angle,
Fig. 5
the appearance of the security element Fig. 4 with simultaneous illumination with daylight and UV light, in (a) when viewed at an angle and in (b) when viewed vertically,
Fig. 6
a banknote with a security strip according to a further exemplary embodiment of the invention in daylight view,
Fig. 7
the appearance of the security strip Fig. 6 under different lighting conditions, in (a) only in daylight, in (b) only in UV light, in (c) with simultaneous illumination with daylight and UV light, and in (d) in infrared light,
Fig. 8
an arrangement for generating an optically variable luminescence motif,
Fig. 9
in (a) to (c) exemplary visual appearances of an optically variable luminescence motif when changing the viewing direction, and
Fig. 10
in (a) to (d) different luminescent motif images from moiré enlargement arrangements, the appearance in daylight being shown in the left half of the image and the appearance in UV light being shown in the right half of the image.

Die Erfindung wird nun am Beispiel der Absicherung von Banknoten erläutert. Figur 1 zeigt hierzu schematisch eine Banknote 10 mit einem erfindungsgemäßen Sicherheitselement 12, dessen visueller Eindruck bei unterschiedlichen Beleuchtungs- und Betrachtungsbedingungen in den Figuren 2 und 3 genauer dargestellt ist.The invention will now be explained using the example of securing banknotes. Figure 1 shows schematically a banknote 10 with a security element 12 according to the invention, the visual impression of which is shown under different lighting and viewing conditions Figures 2 and 3 is shown in more detail.

Dabei zeigt Figur 2 das Erscheinungsbild des Sicherheitselements 12 bei Beleuchtung nur mit einer Lichtsorte, entweder Licht 20 im sichtbaren Wellenlängenbereich (in dieser Beschreibung auch als Tageslicht bezeichnet) oder UV-Licht 22. Konkret zeigt Fig. 2(a) das Erscheinungsbild des Sicherheitselements 12 im Tageslicht 20 bei schräger Betrachtung, Fig. 2(b) das Erscheinungsbild im Tageslicht bei senkrechter Betrachtung und Fig. 2(c) das Erscheinungsbild des Sicherheitselements 12 nach UV-Anregung 22, welches im Wesentlichen unabhängig von der Betrachtungsrichtung ist. Figur 3 zeigt das Erscheinungsbild des Sicherheitselements 12 bei gleichzeitiger Beleuchtung mit beiden Lichtsorten 20, 22, wobei Fig. 3(a) das Erscheinungsbild bei schräger Betrachtung und Fig. 3(b) das Erscheinungsbild bei senkrechter Betrachtung zeigt.This shows Figure 2 specifically shows the appearance of the security element 12 when illuminated with only one type of light, either light 20 in the visible wavelength range (also referred to as daylight in this description) or UV light 22 Fig. 2(a) the appearance of the security element 12 in daylight 20 when viewed from an angle, Fig. 2(b) the appearance in daylight when viewed vertically and Fig. 2(c) the appearance of the security element 12 after UV excitation 22, which is essentially independent of the viewing direction. Figure 3 shows the appearance of the security element 12 when simultaneously illuminated with both types of light 20, 22, where Fig. 3(a) the appearance when viewed from an angle and Fig. 3(b) the appearance when viewed vertically.

Zur Erläuterung des Grundprinzips der Erfindung ist in den Figuren 2 und 3 ein Sicherheitselement 12 illustriert, dass zwei nicht-überlappende, aber aneinander angrenzend ausgebildete Motivbereiche 14, 16 enthält, die im Ausführungsbeispiel durch die obere bzw. untere Bogenhälfte des in Fig. 1 gezeigten Bogenmotiv gebildet sind. In anderen Gestaltungen können die Motivbereiche 14, 16 beispielsweise auch beabstandet voneinander angeordnet sein.To explain the basic principle of the invention is in the Figures 2 and 3 a security element 12 illustrates that contains two non-overlapping but adjacent motif areas 14, 16, which in the exemplary embodiment are defined by the upper and lower half of the arch of the in Fig. 1 shown arch motif are formed. In other designs, the motif areas 14, 16 can also be arranged at a distance from one another, for example.

Der erste Motivbereich stellt einen optisch variablen Tageslicht-Motivbereich 14 dar, der im sichtbaren Licht 20 (Tageslicht) aus unterschiedlichen Betrachtungsrichtungen zwei unterschiedliche Erscheinungsbilder zeigt. Im Ausführungsbeispiel erscheint der Motivbereich 14 bei senkrechter Betrachtung mit dem Farbton Magenta (M), wie in Fig. 2(b) gezeigt, und bei schräger Betrachtung mit dem Farbton Grün (G), wie in Fig. 2(a) dargestellt.The first motif area represents an optically variable daylight motif area 14, which shows two different appearances in visible light 20 (daylight) from different viewing directions. In the exemplary embodiment, the motif area 14 appears with the color magenta (M) when viewed vertically, as in Fig. 2(b) shown, and when viewed from an angle with the color green (G), as in Fig. 2(a) shown.

Der zweite Motivbereich stellt einen Lumineszenz-Motivbereich 16 dar, der bei reiner Tageslichtbeleuchtung nicht erkennbar ist, und in den Figuren 2(a) und 2(b) daher nur mit gestricheltem Umriss eingezeichnet ist. Bei UV-Anregung 22 zeigt der Lumineszenz-Motivbereich 16 ein mehrfarbiges Lumineszenzmotiv, wobei im Ausführungsbeispiel der Figuren 2 und 3 der Einfachheit halber nur zwei Farbbereiche 16-1, 16-2 gezeigt sind, in denen das Lumineszenzmotiv mit den Lumineszenzfarben Magenta (M) bzw. Blau (B) luminesziert. Die Lumineszenzfarbe Magenta ist dabei eine Mischfarbe, die durch additive Farbmischung von Lumineszenzrot und Lumineszenzblau erzeugt wird.The second motif area represents a luminescence motif area 16, which is not visible in pure daylight lighting, and in the Figures 2(a) and 2(b) is therefore only shown with a dashed outline. When UV excitation 22 shows the luminescence motif area 16 a multi-colored luminescence motif, in the exemplary embodiment Figures 2 and 3 For the sake of simplicity, only two color areas 16-1, 16-2 are shown, in which the luminescent motif luminesces with the luminescent colors magenta (M) and blue (B), respectively. The luminescent color magenta is a mixed color that is created by additive color mixing of luminescent red and luminescent blue.

Bei reiner UV-Beleuchtung ist der Tagelicht-Motivbereich 14 kaum oder nicht erkennbar und in der Fig. 2(c) daher nur mit gestricheltem Umriss eingezeichnet. Das Lumineszenzmotiv der Farbbereiche 16-1, 16-2 verändert sich beim Kippen des Sicherheitselements 12 nicht, es erscheint vielmehr bei senkrechter und bei schräger Betrachtung bzw. Beleuchtung im Wesentlichen mit demselben, in Fig. 2(c) illustrierten Farbeindruck.With pure UV lighting, the daylight motif area 14 is hardly or not visible and in the Fig. 2(c) therefore only shown with a dashed outline. The luminescence motif of the color areas 16-1, 16-2 does not change when the security element 12 is tilted, but rather appears essentially the same when viewed vertically and when viewed at an angle or illuminated Fig. 2(c) illustrated color impression.

Als Besonderheit ist der optisch variable Tageslicht-Motivbereich 14 in seinem Erscheinungsbild bei senkrechter Betrachtung an das Lumineszenzmotiv der Farbbereiche 16-1, 16-2 angepasst, zeigt nämlich im Motivbereich 14 denselben Farbton Magenta (M) wie der Teilbereich 16-1 des Lumineszenzmotivs. Die Nachstellung einer solchen Farbübereinstimmung zwischen einem optisch variablen Bereich 14 und einem Lumineszenzbereich 16 stellt eine große Herausforderung für einen potentiellen Fälscher dar, insbesondere wenn wie hier eine Mischfarbe übereinstimmt, oder wenn mehrere Farben oder sogar Farbverläufe übereinstimmen, wie in weiter unten beschriebenen Ausgestaltungen gezeigt.A special feature of the optically variable daylight motif area 14 is its appearance when vertical Viewing adapted to the luminescence motif of the color areas 16-1, 16-2, the motif area 14 shows the same shade of magenta (M) as the partial area 16-1 of the luminescence motif. Reproducing such a color match between an optically variable area 14 and a luminescence area 16 represents a great challenge for a potential counterfeiter, especially if a mixed color matches, as here, or if several colors or even color gradients match, as shown in embodiments described further below.

Die Farbübereinstimmung kann durch abwechselnde Beleuchtung des Sicherheitselements 12 mit Tageslicht 20 und UV-Licht 22 geprüft werden, kann aber insbesondere auch durch eine gleichzeitige Beleuchtung mit Tageslicht und UV-Licht abgefragt werden, wie in Fig. 3 illustriert.The color match can be checked by alternating illumination of the security element 12 with daylight 20 and UV light 22, but can in particular also be queried by simultaneous illumination with daylight and UV light, as in Fig. 3 illustrated.

Bei gleichzeitiger Beleuchtung mit Tageslicht 20 und UV-Licht 22 erscheint bei der in Fig. 3(a) gezeigten schrägen Betrachtung der Tageslicht-Motivbereich 14 mit dem Farbton Grün (G) und der Lumineszenzbereich 16 im ersten Farbbereich 16-1 mit dem Farbton Magenta (M) und im zweiten Farbbereich 16-2 mit dem Farbton Blau (B). Beim Kippen des Sicherheitselements 12 in die in Fig. 3(b) dargestellte senkrechte Betrachtungsrichtung verändert der optisch variable Motivbereich 14 sein Erscheinungsbild und erscheint dann wie der erste Farbbereich 16-1 des Lumineszenzbereichs mit dem Farbton Magenta (M). Die Farbtongleichheit der Bereiche 14 und 16-1 fällt für einen Betrachter sofort ins Auge und kann daher leicht geprüft werden. Zudem ergibt sich durch die aneinander grenzende Anordnung der Teilbereiche 14, 16 eine visuell gut erkennbare und memorierbare Vervollständigung der Teilmotive 14 und 16 zu einem Gesamtmotiv.When illuminated with daylight 20 and UV light 22 at the same time, the in Fig. 3(a) shown oblique view of the daylight motif area 14 with the color green (G) and the luminescence area 16 in the first color area 16-1 with the color magenta (M) and in the second color area 16-2 with the color blue (B). When tilting the security element 12 into the in Fig. 3(b) In the vertical viewing direction shown, the optically variable motif area 14 changes its appearance and then appears like the first color area 16-1 of the luminescence area with the color magenta (M). The color matching of areas 14 and 16-1 is immediately apparent to a viewer and can therefore be easily checked. In addition, the adjacent arrangement of the partial areas 14, 16 results in a visually easily recognizable and memorable completion of the partial motifs 14 and 16 to form an overall motif.

Die Figuren 4 und 5 zeigen in einer zu den Figuren 2 und 3 analogen Darstellung ein weiteres Ausführungsbeispiel, bei dem die beiden Motivbereiche 14, 16 jeweils zwei farbtongleiche Bereiche enthalten. Mit Bezug zunächst auf Fig. 4(b) erscheint der optisch variable Tageslicht-Motivbereich 14 im sichtbaren Licht bei senkrechter Betrachtung in einem ersten Farbbereich 14-1 mit dem Farbton Magenta (M) und in einem zweiten Farbbereich 14-2 mit dem Farbton Blau (B). Beim Kippen des Sicherheitselements 12 in die in Fig. 4(a) dargestellte schräge Betrachtungsrichtung verändert sich das Erscheinungsbild des Bereichs 14 durch den Farbkippeffekt von Magenta zu Grün und von Blau zu Magenta, so dass der erste Farbbereich 14-1 bei schräger Tageslichtbetrachtung mit dem Farbton Grün (G) und der zweiten Farbbereich 14-2 mit dem Farbton Magenta (M) erscheint.The Figures 4 and 5 show in one to the Figures 2 and 3 Analogous representation shows a further exemplary embodiment in which the two motif areas 14, 16 each contain two areas of the same color. With reference first to Fig. 4(b) When viewed vertically, the optically variable daylight motif area 14 appears in visible light in a first color area 14-1 with the color magenta (M) and in a second color area 14-2 with the color blue (B). When tilting the security element 12 into the in Fig. 4(a) In the oblique viewing direction shown, the appearance of the area 14 changes due to the color shift effect from magenta to green and from blue to magenta, so that the first color area 14-1 has the color green (G) when viewed at an angle in daylight and the second color area 14-2 has the color tone (G). The color magenta (M) appears.

Der zweite Motivbereich 16 ist wie bei den Figuren 2 und 3 bereits beschrieben ausgebildet und zeigt bei UV-Anregung 22 ein mehrfarbiges Lumineszenzmotiv mit einem ersten Farbbereich 16-1 in der Lumineszenzfarbe Magenta (M) und einem zweiten Farbbereich 16-2 in der Lumineszenzfarbe Blau (B). Das Lumineszenzmotiv der Farbbereiche 16-1, 16-2 verändert sich beim Kippen des Sicherheitselements 12 nicht und erscheint bei senkrechter und schräger Betrachtung bzw. Beleuchtung im Wesentlichen mit demselben, in Fig. 4(c) illustrierten Farbeindruck.The second motif area 16 is like that Figures 2 and 3 already described and shows upon UV excitation 22 a multicolored luminescence motif with a first color range 16-1 in the luminescence color magenta (M) and a second color range 16-2 in the luminescence color blue (B). The luminescence motif of the color areas 16-1, 16-2 does not change when the security element 12 is tilted and appears essentially the same when viewed vertically and obliquely or illuminated Fig. 4(c) illustrated color impression.

Als Besonderheit ist der optisch variable Tageslicht-Motivbereich 14 in seinen beiden Erscheinungsbildern mit jeweils zumindest einem Farbbereich an das Lumineszenzmotiv angepasst. Bei dem Erscheinungsbild bei schräger Betrachtung (Fig. 4(a) und 4(c)) erscheinen nämlich sowohl der Farbbereich 14-2 des Tageslicht-Motivbereichs 14 als auch der Farbbereich 16-1 des Lumineszenz-Motivbereichs 16 den Farbton Magenta (M), so dass eine Anpassung in einem Farbbereich vorliegt.As a special feature, the optically variable daylight motif area 14 is adapted to the luminescence motif in its two appearances, each with at least one color area. Given the appearance when viewed from an angle ( Figs. 4(a) and 4(c) ) namely, both the color range 14-2 of the daylight motif area 14 and the color area 16-1 of the luminescence motif area 16 appear the color magenta (M), so that there is an adaptation in one color area.

Bei dem Erscheinungsbild bei senkrechter Betrachtung gibt es sogar zwei aneinander angepasste Bereiche in den Motivbereichen 14,16, wie in Figuren 4(b) und 4(c) illustriert: Einerseits erscheinen sowohl der Farbbereich 14-1 des Tageslicht-Motivbereichs 14 als auch der Farbbereich 16-1 des Lumineszenz-Motivbereichs 16 mit dem Farbton Magenta (M), andererseits erscheinen sowohl der Farbbereich 14-2 des Tageslicht-Motivbereichs 14 als auch der Farbbereich 16-2 des Lumineszenz-Motivbereichs 16 mit dem Farbton Blau (B).In the appearance when viewed vertically, there are even two areas that are adapted to one another in the motif areas 14, 16, as in Figures 4(b) and 4(c) illustrated: On the one hand, both the color range 14-1 of the daylight motif area 14 and the color range 16-1 of the luminescence motif area 16 appear with the color magenta (M), on the other hand, both the color range 14-2 of the daylight motif area 14 appear the color range 16-2 of the luminescence motif area 16 with the color blue (B).

Die genannten Farbübereinstimmungen können durch abwechselnde Beleuchtung mit Tageslicht 20 und UV-Licht 22 geprüft werden, können mit Bezug auf Fig. 5 aber auch durch gleichzeitige Beleuchtung mit Tageslicht und UV-Licht geprüft werden. Bei gleichzeitiger Beleuchtung mit Tageslicht 20 und UV-Licht 22 erscheinen bei der in Fig. 5(a) gezeigten schrägen Betrachtungsrichtung die Farbbereiche 14-2 und 16-1 gleichzeitig im Farbton Magenta (M). Bei der in Fig. 5(b) gezeigten senkrechten Betrachtung erscheinen einerseits die Farbbereiche 14-1 und 16-1 gleichzeitig im Farbton Magenta (M) und andererseits die Farbbereiche 14-2 und 16-2 gleichzeitig im Farbton Blau (B).The color matches mentioned can be checked by alternating lighting with daylight 20 and UV light 22, can be checked with reference to Fig. 5 but can also be tested by simultaneous lighting with daylight and UV light. When illuminated with daylight 20 and UV light 22 at the same time, the in Fig. 5(a) In the oblique viewing direction shown, the color areas 14-2 and 16-1 are simultaneously in the color magenta (M). At the in Fig. 5(b) In the vertical view shown, on the one hand, the color areas 14-1 and 16-1 appear simultaneously in the color magenta (M) and, on the other hand, the color areas 14-2 and 16-2 appear simultaneously in the color blue (B).

Es ist natürlich auch möglich, die Farbbereiche der Bereiche 14, 16 so aufeinander abzustimmen, dass nur bei einer Betrachtungsrichtung, beispielsweise der senkrechten Betrachtungsrichtung der Fig. 5(b), Farbübereinstimmungen auftreten, während es in anderen Betrachtungsrichtungen, beispielsweise der schrägen Betrachtungsrichtung der Fig. 5(a), keine Farbübereinstimmungen gibt, so dass durch Hin- und Her-Kippen des Sicherheitselements 12 in gemischtem Licht 20, 22 in auffälliger Weise zwischen Farbübereinstimmung und fehlender Farbübereinstimmung gewechselt werden kann.It is of course also possible to coordinate the color ranges of the areas 14, 16 with one another in such a way that only in one viewing direction, for example the vertical viewing direction Fig. 5(b) , color matches occur while it is in other viewing directions, for example the oblique viewing direction of the Fig. 5(a) , there are no color matches, so that by tilting the security element 12 back and forth in mixed light 20, 22 it is possible to switch in a conspicuous manner between color match and lack of color match.

Die Figuren 6 und 7 illustrieren den Einsatz des beschriebenen Grundprinzips in einem komplexeren Sicherheitselement, nämlich einem breiten Sicherheitsstreifen 30 zum Aufbringen auf eine Banknote 32, wie in der Tageslichtansicht der Fig. 6 illustriert. Der Sicherheitsstreifen 30 ist in Fig. 7 genauer dargestellt, wobei dort Fig. 7(a) das Erscheinungsbild des Sicherheitsstreifens 30 nur im Tageslicht 20, Fig. 7(b) das Erscheinungsbild des Sicherheitsstreifens 30 nur im UV-Licht 22 und Fig. 7(c) das Erscheinungsbild des Sicherheitsstreifens 30 bei Beleuchtung mit beiden Lichtsorten 20, 22 zeigt. Figur 7(d) illustriert schließlich das Erscheinungsbild einer optionalen Weiterbildung des Sicherheitsstreifens 30 im IR-Licht 24.The Figures 6 and 7 illustrate the use of the basic principle described in a more complex security element, namely a wide security strip 30 for application to a banknote 32, as in the daylight view of Fig. 6 illustrated. The security strip 30 is in Fig. 7 presented in more detail, where there Fig. 7(a) the appearance of the security strip 30 only in daylight 20, Fig. 7(b) the appearance of the security strip 30 only in UV light 22 and Fig. 7(c) the appearance of the security strip 30 when illuminated with both types of light 20, 22 shows. Figure 7(d) finally illustrates the appearance of an optional development of the security strip 30 in the IR light 24.

Mit Bezug zunächst auf Figuren 6 und 7(a) enthält der Sicherheitsstreifen 30 einen aus mehreren Teilbereichen 42, 44 bestehenden, optisch variablen Tageslicht-Motivbereich 40, wobei die Teilbereiche 42, 44 jeweils ein Hologramm 46 enthalten, das bei senkrechter Aufsicht einen Farbverlauf von einem hellblauen Farbbereich 46-1 zu einem dunkelblauen Farbbereich 46-2 zeigt. Der Farbverlauf ist in den Figuren durch vierstufigen Verlauf veranschaulicht, kann aber in der Praxis selbstverständlich mehr Stufen enthalten oder sogar kontinuierlich ausgebildet sein.With reference first to Figures 6 and 7(a) The security strip 30 contains an optically variable daylight motif area 40 consisting of several partial areas 42, 44, the partial areas 42, 44 each containing a hologram 46 which, when viewed vertically, has a color gradient from a light blue color area 46-1 to a dark blue color area 46 -2 shows. The color gradient is illustrated in the figures as a four-stage progression, but in practice it can of course contain more stages or even be continuous.

Mit Bezug auf Fig. 7(b) enthält der Sicherheitsstreifen 30 weiter einen Lumineszenz-Motivbereich 50, der nach UV-Anregung 22 ein mehrfarbiges Lumineszenzmotiv zeigt, das ebenfalls aus mehreren Teilbereichen 52, 54, 56 besteht. Im Ausführungsbeispiel stellen die Teilbereiche ein Echtfarb-Portrait 52 vor dem Hintergrund eines blauen Himmels 54 und eine Buchstabenfolge 56 dar. Der Himmelshintergrund 54 zeigt dabei im UV-Licht 22 einen Farbverlauf von einem hellblauen Farbbereich 54-1 zu einem dunkelblauen Farbbereich 54-2, wobei die Farbtöne des Farbverlaufs und der Farb-Endpunkte 54-1, 54-2 den Farbtönen der Farbverläufe und der Farb-Endpunkte 46-1, 46-2 in den Hologrammen 46 des Tageslicht-Motivbereichs 40 entsprechen.Regarding Fig. 7(b) The security strip 30 further contains a luminescence motif area 50, which after UV excitation 22 shows a multicolored luminescence motif, which also consists of several partial areas 52, 54, 56. In the exemplary embodiment, the partial areas represent a true color portrait 52 against the background of a blue sky 54 and a letter sequence 56. The sky background 54 shows a color gradient in the UV light 22 from a light blue color area 54-1 to a dark blue color area 54-2, wherein the hues of the color gradient and the color end points 54-1, 54-2 correspond to the hues of the color gradients and the color end points 46-1, 46-2 in the holograms 46 of the daylight motif area 40.

Die Farbübereinstimmung zwischen dem Farbverlauf in den Hologrammen 46 und dem Farbverlauf in dem lumineszierenden Himmelshintergrund 54 kann nun bei senkrechter Betrachtung durch abwechselnde Beleuchtung mit Tageslicht 20 und UV-Licht 22 geprüft werden, sie kann mit Bezug auf Fig. 7(c) allerdings auch durch gleichzeitige Beleuchtung des Sicherheitsstreifens 30 mit Tageslicht und UV-Licht geprüft werden.The color match between the color gradient in the holograms 46 and the color gradient in the luminescent sky background 54 can now be checked when viewed vertically by alternating illumination with daylight 20 and UV light 22; it can be checked with reference to Fig. 7(c) However, it can also be checked by simultaneously illuminating the security strip 30 with daylight and UV light.

Bei gleichzeitiger Beleuchtung mit Tageslicht 20 und UV-Licht 22 sind nämlich bei der in Fig. 7(c) gezeigten senkrechten Betrachtung gleichzeitig die Farbverläufe 46-1 bis 46-2 der Hologramme 46 und der identische Farbverlauf 54-1 bis 54-2 des lumineszierenden Himmelshintergrunds 54 sichtbar. Bei schräger Betrachtung ergibt sich dagegen keine Farbübereinstimmung, da die Hologramme 46 dann mit veränderten Farbtönen oder gar nicht mehr sichtbar sind. Die Nachstellung einer Farbübereinstimmung zwischen einem holographischen Farbverlauf 46-1, 46-2 und einem lumineszierenden Farbverlauf 54-1, 54-2 stellt für einen potentiellen Fälscher eine nur schwer zu überwindende Herausforderung dar.When illuminated with daylight 20 and UV light 22 at the same time, the in Fig. 7(c) shown vertical view, the color gradients 46-1 to 46-2 of the holograms 46 and the identical color gradient 54-1 to 54-2 of the luminescent sky background 54 are visible at the same time. When viewed at an angle, however, there is no color match, since the holograms 46 are then visible with changed color tones or are no longer visible at all. Reproducing a color match between a holographic color gradient 46-1, 46-2 and a luminescent color gradient 54-1, 54-2 represents a difficult challenge for a potential counterfeiter.

Die beschriebenen Sicherheitsmerkmale im sichtbaren und UV-Spektralbereich können durch weitere Echtheitsmerkmale ergänzt werden. Mit Bezug auf Fig. 7(d) können die Teilbereiche 40, 50 beispielsweise zusätzlich eine IR-absorbierende Substanz 62 enthalten, die in einem Teilbereich in Form einer Codierung, beispielsweise eines QR-Codes 60, ausgebildet ist. Bei Bestrahlung des Sicherheitsstreifens 30 mit IR-Strahlung 24 ergibt sich dann das in Fig. 7(d) gezeigte, den Streifen zusätzlich absichernde Erscheinungsbild.The security features described in the visible and UV spectral range can be supplemented by further authenticity features. Regarding Fig. 7(d) The partial areas 40, 50 can, for example, additionally contain an IR-absorbing substance 62, which is designed in a partial area in the form of a code, for example a QR code 60. When the security strip 30 is irradiated with IR radiation 24, this then results in Fig. 7(d) shown, additionally securing the strip appearance.

Nach einer anderen Weiterbildung kann die Änderung des visuellen Erscheinungsbilds des Sicherheitselements beim Wechsel von Tageslicht-Betrachtung zu Betrachtung bei UV-Anregung mit einem optisch variablen Lumineszenzmotiv kombiniert sein.According to another development, the change in the visual appearance of the security element when changing from daylight viewing to viewing under UV excitation can be combined with an optically variable luminescence motif.

Mit Bezug auf Fig. 8 kann ein optisch variables Lumineszenzmotiv beispielsweise analog zu herkömmlichen Linsenkippbildern dadurch erhalten werden, dass eine regelmäßige Anordnung paralleler Zylinderlinsen 70 beabstandet von einem Lumineszenz-Motivbereich 72 angeordnet wird, welcher alternierend in eine Vielzahl paralleler lumineszierender Streifen 74A, 74B unterteilt ist. Die Streifen 74A, 74B und die Zylinderlinsen 70 sind dabei so aufeinander abgestimmt, dass nach UV-Anregung aus einer ersten Betrachtungsrichtung nur die Streifen 74A, aus einer zweiten Betrachtungsrichtung nur die Streifen 74B sichtbar sind und zusammen jeweils ein gewünschtes Lumineszenzbild erzeugen.Regarding Fig. 8 For example, an optically variable luminescence motif can be obtained, analogous to conventional lens tilt images, by arranging a regular arrangement of parallel cylindrical lenses 70 at a distance from a luminescence motif area 72, which is alternately divided into a plurality of parallel luminescent strips 74A, 74B. The strips 74A, 74B and the cylindrical lenses 70 are coordinated with one another in such a way that after UV excitation only the stripes 74A are visible from a first viewing direction and only the stripes 74B are visible from a second viewing direction and together they each produce a desired luminescence image.

Figur 9 illustriert in (a) bis (c) beispielhaft einige mögliche visuelle Erscheinungsbilder eines solchen optisch variablen Lumineszenzmotivs beim Wechsel der Betrachtungsrichtung (Pfeil 90). Im Ausführungsbeispiel der Fig. 9(a) erscheint der dargestellte Lumineszenzbereich 80 bei UV-Anregung aus einer ersten Betrachtungsrichtung in einer ersten Farbe, beispielsweise Rot (R), während er aus einer zweiten Betrachtungsrichtung in einer zweiten Farbe, beispielsweise Gelb (Y) erscheint. Figure 9 illustrates in (a) to (c) some possible visual appearances of such an optically variable luminescence motif when changing the viewing direction (arrow 90). In the exemplary embodiment Fig. 9(a) When exposed to UV excitation from a first viewing direction, the illustrated luminescence region 80 appears in a first color, for example red (R), while from a second viewing direction it appears in a second color, for example yellow (Y).

Bei dem Ausführungsbeispiel der Fig. 9(b) stellt der Lumineszenzbereich ein zweifarbiges Muster aus zwei parallelen Streifen 82, 84 dar, deren Lumineszenzfarben sich beim Wechsel 90 der Betrachtungsrichtung gegeneinander austauschen. Aus einer ersten Betrachtungsrichtung zeigen die Streifen 82, 84 beispielsweise nach UV-Anregung die Farbabfolge Rot-Gelb (linker Bildteil), während sie aus einer zweiten Betrachtungsrichtung die Farbabfolge Gelb-Rot (rechter Bildteil) zeigen.In the exemplary embodiment of Fig. 9(b) the luminescence area represents a two-color pattern of two parallel stripes 82, 84, the luminescence colors of which exchange one another when the viewing direction changes 90. From a first viewing direction, for example after UV excitation, the strips 82, 84 show the color sequence red-yellow (left part of the image), while from a second viewing direction they show the color sequence yellow-red (right part of the image).

Beim Ausführungsbeispiel der Fig. 9(c) erscheint oder verschwindet im Lumineszenzbereich 86 beim Kippen 90 ein zusätzliches Motiv 88. Beispielsweise erscheint der Lumineszenzbereich 86 aus einer ersten Betrachtungsrichtung nach UV-Anregung gleichförmig Rot (R), während aus einer zweiten Betrachtungsrichtung zusätzlich Wappenmotive 88 in Gelb (Y) vor dem rotem Hintergrund sichtbar sind.In the exemplary embodiment of Fig. 9(c) An additional motif 88 appears or disappears in the luminescence area 86 when tilting 90. For example, from a first viewing direction after UV excitation, the luminescence area 86 appears uniformly red (R), while from a second viewing direction additional coat of arms motifs 88 appear in yellow (Y) against the red background are visible.

Solche optisch variablen Lumineszenzeffekte lassen sich nicht nur mit Linsenanordnungen nach Fig. 8, sondern beispielsweise auch mit Prismenanordnungen oder mit Jalousie-Rastern erzeugen, wobei in letzterem Fall die Rasterelemente insbesondere aus opaken oder transparenten UV-Blockern gebildet sein können.Such optically variable luminescence effects cannot only be achieved with lens arrangements Fig. 8 , but also, for example, with prism arrangements or with blind grids, in which case the grid elements can be formed in particular from opaque or transparent UV blockers.

Eine weitere Möglichkeit, optisch variable Lumineszenzmotive zu erzeugen, besteht im Einsatz von Moire-Vergrößerungsanordnungen, wie sie als solche grundsätzlich beispielsweise in den Druckschriften WO 2009/00528 A1 und WO 2006/087138 A1 beschrieben sind. Als Besonderheit werden im Rahmen der vorliegenden Anmeldung gleich- oder verschiedenfarbig lumineszierende Mikrobilder eingesetzt. Im Tageslicht können die Mikrobilder entweder nicht sichtbar sein, beispielsweise transparent sein oder dieselbe Körperfarbe wie der Untergrund aufweisen, oder sie können sichtbar sein und gleiche oder verschiedene Farben aufweisen.Another way to create optically variable luminescence motifs is to use moiré magnification arrangements, as such, in principle, for example in the printed matter WO 2009/00528 A1 and WO 2006/087138 A1 are described. As a special feature, luminescent microimages of the same or different colors are used in the context of the present application. In daylight, the microimages can either be invisible, for example transparent or have the same body color as the background, or they can be visible and have the same or different colors.

Figur 10 zeigt beispielhaft unterschiedliche Motivbilder 100 solcher Moire-Vergrößerungsanordnungen, wie sie beispielsweise in einem Sicherheitsfaden als Teil eines oben beschriebenen Sicherheitselements vorgesehen sein können. Die regelmäßig angeordneten Mikrobilder sind dabei zur Illustration jeweils in Form eines Sterns ausgebildet, können in der Praxis aber beliebige andere Formen haben. In der linken Bildhälfte der Figuren 10(a) bis 10(d) ist jeweils das Erscheinungsbild der Motivbilder im Tageslicht 20, in der rechten Bildhälfte das Erscheinungsbild im UV-Licht 22 gezeigt. Figure 10 shows, by way of example, different motif images 100 of such moiré enlargement arrangements, as can be provided, for example, in a security thread as part of a security element described above. The regularly arranged microimages are each designed in the form of a star for illustration, but in practice they can have any other shape. In the left half of the picture the Figures 10(a) to 10(d) The appearance of the motif images in daylight 20 is shown in each case, and the appearance in UV light 22 is shown in the right half of the image.

Im Ausführungsbeispiel der Fig. 10(a) sind die Mikrobilder 102 zunächst so ausgebildet, dass sie im Tageslicht 20 alle denselben Farbton 104-F aufweisen, während die Mikrobilder 102 im UV-Licht 22 in unterschiedlichen Lumineszenzfarben 106-A, 106-B, 106-C, 106-D leuchten. Durch den Moireeffekt ergibt sich bei Betrachtung sowohl im Tageslicht 20 als auch im UV-Licht 22 ein dynamischer Bewegungseffekt beim Kippen des Sicherheitselements, wobei die sich bewegenden, Moire-vergrößerten Sterne im Tageslicht 20 einfarbig erscheinen, im UV-Licht 22 dagegen mit den unterschiedlichen Lumineszenzfarben 106-A bis 106-D leuchten.In the exemplary embodiment Fig. 10(a) the microimages 102 are initially designed so that they all have the same color tone 104-F in daylight 20, while the microimages 102 glow in different luminescence colors 106-A, 106-B, 106-C, 106-D in UV light 22. The moiré effect results in a dynamic movement effect when the security element is tilted when viewed in both daylight 20 and UV light 22, with the moving, moiré-enlarged stars appearing monochromatic in daylight 20, but with different colors in UV light 22 Luminescent colors 106-A to 106-D light up.

Beim Ausführungsbeispiel der Fig. 10(b) sind die Mikrobilder 102 im sichtbaren Licht 20 transparent und ihre Lage daher in der Figur nur gestrichelt eingezeichnet, während sie im UV-Licht 22 in unterschiedlichen Lumineszenzfarben 106-A, 106-B, 106-C, 106-D leuchten. Im Tageslicht 20 erzeugt das Motivbild 100 somit kein erkennbares Bild und keinen Bewegungseffekt, während im UV-Licht 22 beim Kippen des Sicherheitselements ein dynamischer Bewegungseffekt mit sich bewegenden, in den Lumineszenzfarben 106-A bis 106-D leuchtenden, Moire-vergrößerten Sternen, sichtbar wird.In the exemplary embodiment of Fig. 10(b) the microimages 102 are transparent in visible light 20 and their position is therefore only shown in dashed lines in the figure, while in UV light 22 they glow in different luminescence colors 106-A, 106-B, 106-C, 106-D. In daylight 20, the motif image 100 thus produces no recognizable image and no movement effect, while in UV light 22, when the security element is tilted, a dynamic movement effect with moving, moiré-enlarged stars shining in the luminescent colors 106-A to 106-D is visible becomes.

Beim Ausführungsbeispiel der Fig. 10(c) sind die Mikrobilder 102 so ausgebildet, dass sie im Tageslicht 20 alle denselben Farbton 104-F aufweisen, und auch im UV-Licht 22 alle im selben Farbton 106-G leuchten. Der gemeinsame Tageslicht-Farbton 104-F und der gemeinsame Lumineszenzfarbton 106-G können gleich oder auch verschieden sein. Durch den Moireeffekt ergibt sich sowohl im Tageslicht 20 als auch im UV-Licht 22 jeweils ein einfarbiger dynamischer Bewegungseffekt beim Kippen des Sicherheitselements.In the exemplary embodiment of Fig. 10(c) the microimages 102 are designed so that they all have the same color tone 104-F in daylight 20, and also all shine in the same color tone 106-G in UV light 22. The common daylight color 104-F and the common luminescence color 106-G can be the same or different. The moiré effect results in a monochrome dynamic movement effect in both daylight 20 and UV light 22 when the security element is tilted.

Das Ausführungsbeispiel der Fig. 10(d) zeigt schließlich eine Gestaltung, bei der die Mikrobilder 102 so ausgebildet sind, dass sie im UV-Licht 22 alle denselben Farbton 106-G aufweisen, während sie im Tageslicht 20 in unterschiedlichen Farben 104-A, 104-B, 104-C, 104-D erscheinen. Durch den Moireeffekt ergibt sich sowohl im Tageslicht 20 als auch im UV-Licht 22 ein dynamischer Bewegungseffekt beim Kippen des Sicherheitselements, wobei die sich bewegenden, Moire-vergrößerten Sterne im UV-Licht 22 einfarbig leuchten, im Tageslicht 20 dagegen mit den unterschiedlichen Farben 104-A bis 104-D in Erscheinung treten.The exemplary embodiment of the Fig. 10(d) finally shows a design in which the microimages 102 are designed so that they all have the same color tone 106-G in UV light 22, while in daylight 20 they have different colors 104-A, 104-B, 104-C, 104 -D appear. The moiré effect results in a dynamic movement effect in both daylight 20 and UV light 22 when the security element is tilted, with the moving, moiré-enlarged stars shining in one color in UV light 22, but with different colors 104 in daylight 20 -A to 104-D appear.

BezugszeichenlisteReference symbol list

1010
BanknoteBanknote
1212
SicherheitselementSecurity element
1414
optisch variabler Tageslicht-Motivbereichoptically variable daylight motif area
14-1,14-214-1,14-2
FarbbereicheColor ranges
1616
Lumineszenz-MotivbereichLuminescent motif area
16-1,16-216-1,16-2
FarbbereicheColor ranges
2020
Tageslichtdaylight
2222
UV-LichtUV light
2424
IR-LichtIR light
3030
SicherheitsstreifenSecurity strips
3232
BanknoteBanknote
4040
optisch variabler Tageslicht-Motivbereichoptically variable daylight motif area
42,4442.44
TeilbereicheSub-areas
4646
Hologrammhologram
46-1,46-246-1,46-2
FarbbereicheColor ranges
5050
Lumineszenz-MotivbereichLuminescent motif area
5252
Teilbereich, Echtfarb-PortraitPartial, true color portrait
5454
Teilbereich, HimmelshintergrundPartial area, sky background
5656
Teilbereich, BuchstabenfolgePartial area, sequence of letters
6060
QR-CodeQR code
6262
IR-absorbierende SubstanzIR-absorbing substance
7070
ZylinderlinsenCylindrical lenses
7272
Lumineszenz-MotivbereichLuminescent motif area
74A, 74B74A, 74B
lumineszierende Streifenluminescent strips
8080
LumineszenzbereichLuminescence area
82, 8482, 84
lumineszierende parallele Streifenluminescent parallel stripes
8686
LumineszenzbereichLuminescence area
8888
zusätzliches Motivadditional motif
9090
Wechsel der BetrachtungsrichtungChange of viewing direction
100100
MotivbildMotif image
102102
MikrobilderMicro images
104-A, 104-B, 104-C, 104-D104-A, 104-B, 104-C, 104-D
TageslichtfarbenDaylight colors
104-F104-F
TageslichtfarbtonDaylight hue
106-A, 106-B, 106-C, 106-D106-A, 106-B, 106-C, 106-D
LumineszenzfarbenLuminescent colors
106-G106-G
LumineszenzfarbtonLuminescent hue

Claims (19)

  1. Security element (12) for securing security papers, value documents and other data carriers (10), with
    - an optically variable daylight motif region (14) that shows at least two different appearances (14G, 14M) in visible light (20) from different viewing directions, and
    - a luminescence motif region (16) that shows at least one luminescence motif (16-1, 16-2) after UV excitation, wherein the luminescence motif is a multicolored luminescence motif, and
    wherein the optically variable daylight motif region is adapted in at least one of its appearances to the at least one multicolored luminescence motif, namely has at least one region with the same color gradation as a region of the multicolored luminescence motif, and
    wherein the optically variable daylight motif region in at least one of its appearances and the at least one multicolored luminescence motif have at least two regions with the same color tone, wherein between the two stated regions with the same color tone the same color gradation from the color tone of the first region to the color tone of the second region is present in each case.
  2. Security element (12) for securing security papers, value documents and other data carriers (10), with
    - an optically variable daylight motif region (14) that shows at least two different appearances (14G, 14M) in visible light (20) from different viewing directions, and
    - a luminescence motif region (16) that shows at least one luminescence motif (16-1, 16-2) after UV excitation, wherein the luminescence motif is a multicolored luminescence motif, and
    wherein the optically variable daylight motif region is adapted in at least one of its appearances to the at least one multicolored luminescence motif, namely has at least one region with the same color tone as a region of the multicolored luminescence motif, and
    wherein the luminescence motif region is a true-color luminescence region which contains mixed colors of at least two luminescence basic colors.
  3. Security element (12) for securing security papers, value documents and other data carriers (10), with
    - an optically variable daylight motif region (14) that shows at least two different appearances (14G, 14M) in visible light (20) from different viewing directions, and
    - a luminescence motif region (16) that shows at least one luminescence motif (16-1, 16-2) after UV excitation, wherein the luminescence motif is a multicolored luminescence motif,
    wherein the optically variable daylight motif region is adapted in at least one of its appearances to the at least one multicolored luminescence motif, namely has at least one region with the same color tone as a region of the multicolored luminescence motif, and
    wherein the optically variable daylight motif region and the luminescence motif region are arranged adjacent to one another or spaced apart on the security element.
  4. Security element (12) for securing security papers, value documents and other data carriers (10), with
    - an optically variable daylight motif region (14) that shows at least two different appearances (14G, 14M) in visible light (20) from different viewing directions, and
    - a luminescence motif region (16) that shows at least one luminescence motif (16-1, 16-2) after UV excitation, wherein the luminescence motif is a multicolored luminescence motif,
    wherein the optically variable daylight motif region is adapted in at least one of its appearances to the at least one multicolored luminescence motif, namely has at least one region with the same color tone as a region of the multicolored luminescence motif, and
    wherein the optically variable daylight motif region and the luminescence motif region form motif parts which complement one another to form an overall motif.
  5. Security element according to at least one of Claims 2 to 4, characterized in that the optically variable daylight motif region in at least one of its appearances and the at least one multicolored luminescence motif have at least two regions with the same color tone, that between the two stated regions with the same color tone the same color gradation from the color tone of the first region to the color tone of the second region is present in each case.
  6. Security element according to at least one of Claims 1 and 3 to 5, characterized in that the luminescence motif region is a true-color luminescence region which contains mixed colors of at least two, preferably three, luminescence basic colors, in particular mixed colors of luminescence green, luminescence red and luminescence blue.
  7. Security element according to at least one of Claims 1, 2 and 4 to 6, characterized in that the optically variable daylight motif region and the luminescence motif region are arranged adjacent to one another or spaced apart on the security element.
  8. Security element according to at least one of Claims 1, 2 and 4 to 6, characterized in that the optically variable daylight motif region and the luminescence motif region are arranged to overlap one another on the security element and the daylight motif region and the luminescence motif region in the overlap region are adapted to one another in terms of their color.
  9. Security element according to at least one of Claims 1 to 3 and 5 to 8, characterized in that the optically variable daylight motif region and the luminescence motif region form motif parts which complement one another to form an overall motif.
  10. Security element according to at least one of Claims 1 to 9, characterized in that the optically variable daylight motif region contains one or several elements selected from the group consisting of holograms, hologram-like diffraction structures, diffraction patterns, structures with a color shift effect, kinoforms, structures with a microlens effect, microoptical display arrangements, in particular moiré magnification arrangements and lens-grid images.
  11. Security element according to at least one of Claims 1 to 10, characterized in that the luminescence motif region is configured to be optically variable and shows at least two different appearances after UV excitation from different excitation directions, or shows at least two different appearances from different viewing directions after UV excitation.
  12. Security element according to Claim 11, characterized in that the luminescence motif region configured to be optically variable is part of a micro-optical display arrangement, in particular of a moiré magnification arrangement or of a lens-grid image.
  13. Security element according to at least one of Claims 1 to 12, characterized in that the optically variable daylight motif region and/or the luminescence motif region contain an IR-absorbing substance, preferably in the form of patterns, characters or a coding, such as a bar code or QR code.
  14. Security element according to at least one of Claims 1 to 13, characterized in that the security element is a security thread, in particular a windowed security thread or a pendulating security thread, a security band, or a security strip.
  15. Data carrier with a security element according to at least one of Claims 1 to 14.
  16. Method for manufacturing a security element according to any of Claims 1 and 7 to 14, wherein
    - an optically variable daylight motif region is produced on a carrier, said region showing at least two different appearances in visible light from different viewing directions, and
    - a luminescence motif region is produced on the carrier, said region showing at least one multicolored luminescence motif after UV excitation, wherein
    - the optically variable daylight motif region is adapted in at least one of its appearances to the at least one multicolored luminescence motif in that at least one region in the appearance has the same color gradation as a region of the multicolored luminescence motif,
    wherein the optically variable daylight motif region in at least one of its appearances and the at least one multicolored luminescence motif have at least two regions with the same color tone, wherein between the two stated regions with the same color tone the same color gradation from the color tone of the first region to the color tone of the second region is present in each case.
  17. Method for manufacturing a security element according to any of Claims 2 and 5 to 14, wherein
    - an optically variable daylight motif region is produced on a carrier, said region showing at least two different appearances in visible light from different viewing directions, and
    - a luminescence motif region is produced on the carrier, said region showing at least one multicolored luminescence motif after UV excitation, wherein
    - the optically variable daylight motif region is adapted in at least one of its appearances to the at least one multicolored luminescence motif in that at least one region in the appearance has the same color tone as a region of the multicolored luminescence motif,
    wherein the luminescence motif region is a true-color luminescence region which contains mixed colors of at least two luminescence basic colors.
  18. Method for manufacturing a security element according to any of Claims 3 and 5 to 14, wherein
    - an optically variable daylight motif region is produced on a carrier, said region showing at least two different appearances in visible light from different viewing directions, and
    - a luminescence motif region is produced on the carrier, said region showing at least one multicolored luminescence motif after UV excitation, wherein
    - the optically variable daylight motif region is adapted in at least one of its appearances to the at least one multicolored luminescence motif in that at least one region in the appearance has the same color tone as a region of the multicolored luminescence motif,
    wherein the optically variable daylight motif region and the luminescence motif region are arranged adjacent to one another or spaced apart on the security element.
  19. Method for manufacturing a security element according to any of Claims 4 to 14, wherein
    - an optically variable daylight motif region is produced on a carrier, said region showing at least two different appearances in visible light from different viewing directions, and
    - a luminescence motif region is produced on the carrier, said region showing at least one multicolored luminescence motif after UV excitation, wherein
    - the optically variable daylight motif region is adapted in at least one of its appearances to the at least one multicolored luminescence motif in that at least one region in the appearance has the same color tone as a region of the multicolored luminescence motif,
    wherein the optically variable daylight motif region and the luminescence motif region form motif parts which complement one another to form an overall motif.
EP19000016.6A 2018-01-17 2019-01-10 Security element with luminescence subject area Active EP3513984B2 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102018000343.5A DE102018000343A1 (en) 2018-01-17 2018-01-17 Security element with luminescent motif area

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EP3513984B1 EP3513984B1 (en) 2020-09-09
EP3513984B2 true EP3513984B2 (en) 2024-03-20

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DE102021002764A1 (en) 2021-05-27 2022-12-01 Giesecke+Devrient Currency Technology Gmbh Method of making a luminescent ink
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