EP1778501B1 - Security element comprising a support - Google Patents
Security element comprising a support Download PDFInfo
- Publication number
- EP1778501B1 EP1778501B1 EP05770248.2A EP05770248A EP1778501B1 EP 1778501 B1 EP1778501 B1 EP 1778501B1 EP 05770248 A EP05770248 A EP 05770248A EP 1778501 B1 EP1778501 B1 EP 1778501B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- security
- security element
- document
- authenticating mark
- security document
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
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Images
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
- B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
- B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
- B42D25/30—Identification or security features, e.g. for preventing forgery
- B42D25/351—Translucent or partly translucent parts, e.g. windows
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
- B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
- B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
- B42D25/20—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof characterised by a particular use or purpose
- B42D25/29—Securities; Bank notes
-
- 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
- B42D25/355—Security threads
-
- G—PHYSICS
- G07—CHECKING-DEVICES
- G07D—HANDLING OF COINS OR VALUABLE PAPERS, e.g. TESTING, SORTING BY DENOMINATIONS, COUNTING, DISPENSING, CHANGING OR DEPOSITING
- G07D7/00—Testing specially adapted to determine the identity or genuineness of valuable papers or for segregating those which are unacceptable, e.g. banknotes that are alien to a currency
- G07D7/20—Testing patterns thereon
- G07D7/202—Testing patterns thereon using pattern matching
- G07D7/207—Matching patterns that are created by the interaction of two or more layers, e.g. moiré patterns
-
- B42D2033/26—
-
- B42D2035/34—
Definitions
- the invention relates to a security element for securing security papers, documents of value and the like with a transparent or translucent carrier.
- the invention further relates to a security arrangement with such a security element as well as a correspondingly equipped security document
- Transparency windows in bank notes have long been known in the field of polymer notes. Providing a banknote with a see-through window on its own, however, does not yet provide additional counterfeit security for the note. Therefore, various security features have been proposed for see-through windows and partly also converted into banknotes.
- the document describes WO 98/15418 A1 a self-verifying banknote from a flexible sheet of plastic substrate with identification marks.
- the self-verifying banknote has a transparent window area which contains a self-verification means for checking a security element arranged in a laterally-spaced area of the sheet.
- the self-certification takes place in that the window area is brought into register with the security element by bending or folding the sheet and the security element and the self-authorization means cooperate there suitably to authenticate the bill.
- security windows for privacy windows are designed to require more or less complicated means for checking the authenticity of the security feature located in the window.
- external UV lamps, polarizing filters, Moire filters or even authenticity testing are used Laser sources needed to shine through the see-through window to verify the security feature.
- the invention has for its object to provide a generic security element that avoids the disadvantages of the prior art.
- the security element should be difficult to adjust and can be checked for authenticity with simple, almost everywhere available aids.
- the transparent or translucent carrier of the security element is provided with a mark of authenticity, which transmits a first optical impression in transmitted light and conveys a second optical impression in reflected light in front of a predetermined and easily accessible background, which differs significantly from the first optical impression.
- a mark of authenticity which transmits a first optical impression in transmitted light and conveys a second optical impression in reflected light in front of a predetermined and easily accessible background, which differs significantly from the first optical impression.
- the authenticity mark in the transmitted light pattern Shows signs or encodings.
- the appearance or the information represented by the patterns, characters or codes change significantly in incident light in front of the predetermined background or disappear completely.
- a printing layer may additionally be provided, which together with patterns, symbols or codes of the authenticity indicator gives overall information in incident or transmitted light.
- the overall information may appear or disappear, or it may be changed, in particular supplemented.
- the authenticity mark in incident light in front of the predetermined background exhibits an optically variable effect.
- This may, for example, be a viewing-angle-dependent color-shift effect, which conveys to the viewer a color impression which changes with the viewing direction.
- Diffraction effects, scattering effects, in particular resulting from matting, and refractive effects, in particular caused by microlenses and / or micromirrors, are also possible.
- the authenticity mark contains or more layers of liquid-crystalline material, in particular of cholesteric liquid-crystalline material.
- the liquid crystal layers are transparent in transmitted light and substantially colorless, but appear in front of a strongly absorbing dark background with intense colors in appearance. Moreover, when the security element is tilted sideways from the vertical, they produce a color shift effect which, depending on the design, can change from a long-wave to a shorter-wave color impression, or vice versa, from a short-wave to a longer-wave color impression.
- the liquid crystal layers are advantageously in the form of patterns, characters or codes.
- the invention also includes a security arrangement for securing security papers, documents of value and the like which, in addition to a security element of the type described above, has a verification element which provides the predetermined background for viewing the security element in reflected light.
- the verification element has a strongly absorbing, dark surface area. This absorbing surface area can also be provided with further security features, for example a magnetic coding.
- the authenticity check can always be carried out with the verification element of the security arrangement.
- a damage-free examination of the authenticity mark of a security arrangement can be carried out exclusively with a verification element of a security arrangement arranged on another security document. The user is then forced to carry out the authenticity check to take a second similar security document to hand.
- the invention further comprises a security document, such as a security paper, value document or the like, with a security element or a security arrangement of the type described.
- a security document such as a security paper, value document or the like
- the authenticity flag and the verification element are geometrically arranged on the security document such that the authenticity flag is formed by bending or folding the security document can be brought over the verification element.
- the security document advantageously has a paper or plastic substrate.
- the authenticity feature is preferably arranged in or above a window area or a through opening of the security document. If the security document has a plastic substrate, then the authenticity mark is advantageously applied over a transparent or translucent, in particular unprinted, area of the transparent or translucent plastic substrate.
- the mark of authenticity is preferably applied over a continuous opening of the paper substrate or introduced paper-like in such an opening.
- the continuous opening can be produced during papermaking without a sharp boundary edge of its edge region, so that a characteristic deckle edge is created, which is not replicate by cutting or punching.
- the security document represents, in particular, a security paper or a value document, such as a banknote, a check, an identity card, a document or the like.
- Fig. 1 shows a schematic representation of a banknote 10 with a see-through area 12 in a lateral portion of the note.
- the see-through area 12 can be, for example, a continuous opening or a transparent partial area of the banknote 10.
- a transparent security element 14 is arranged.
- the security element 14 gives a first visual impression, in the exemplary embodiment the impression of a structureless and substantially colorless transparent surface.
- the security element can also be designed in such a way that it already has a slight coloration with a defined color impression in transmitted light throughout the entire surface.
- the security element 14 If the banknote 10 with the security element 14 is held against a background of the predetermined type, the security element 14 imparts a second optical impression, which differs significantly from the first optical impression. This clear change of appearance can be used for the authenticity of the bill.
- the color impression, ie hue or color intensity of the security element 14 changes drastically during the transition from transmitted to reflected light observation; patterns, signs or codes appear or disappear, or an optically variable one that is not recognizable in transmitted light Effect, such as a color shift effect or a viewing angle dependent diffraction pattern.
- Fig. 2 shows the layer structure of a security element 20
- the security element 20 of Fig. 2 has a carrier layer 22 of a transparent film, to which a phase-shifting layer 24 and a linearly polarizing layer 26 are applied.
- the main axis of the phase-shifting layer 24 is rotated by at least 10 °, in the exemplary embodiment by 45 °, against the polarization direction of the linearly polarizing layer 26.
- the phase-shifting Layer 24 may be formed, for example, from a birefringent or an optically active material, such as a liquid crystalline material, for example in the nematic or smectic phase.
- the security element 20 appears transparent and structureless.
- a highly reflective background such as a metal surface or the like, it shows distinct colors whose intensity and hue can be varied widely over the optical properties of the phase shifting layer 24 and the linear polarizing layer 26.
- the layer 26 has linearly polarizing properties over the entire visible wavelength range.
- the returning light after passing through the security element twice, lacks a large portion of the red light, so that the security element appears in a characteristic blue hue.
- different color effects can be produced by selecting the birefringent properties of the layer 24 or by selecting its layer thickness.
- the linearly polarizing layer 26 is applied to a transparent carrier foil 32 with birefringent properties, so that a separate phase-shifting layer can be dispensed with.
- Fig. 4 shows a security element 40, which basically like the example of Fig. 2 is constructed.
- the phase-shifting layer 44 lies in Fig. 4 only partially in the form of a coding, for example in the form of a lettering or a symbol before.
- the entire surface of the security element appears colorless and structureless.
- the visual impression does not change in the recessed areas 46, while the areas in which the phase-shifting layer 44 is applied light up in color and make the coding visible.
- Fig. 5 shows a further variant of the security element of Fig. 2 in which a phase-shifting layer 44 of liquid-crystalline material is applied to a carrier film 34 with linearly polarizing properties.
- a phase-shifting layer 44 of liquid-crystalline material is applied to a carrier film 34 with linearly polarizing properties.
- the phase-shifting layer 44 applied only partially in the form of a coding.
- the separate linear polarizing layer is dispensable, since this function is already taken over by the carrier film 34.
- Suitable linear polarizing films are commercially available. Production methods for wavelength-selective polarizing films are described, for example, in the document WO 2004/009373 described, the disclosure of which is included in the present application in this respect.
- FIG. 6 Another variation is in Fig. 6 shown.
- the security element shown there contains two interconnected foils.
- the linearly polarizing carrier film 34 is connected to a second phase-shifting film 36 of suitable layer thickness.
- the second film 36 may be made of PET or polypropylene, for example. To achieve the desired effect, care must be taken only that the major axis of the birefringent film 36 and the axis of the linearly polarizing film 34 are tilted against each other.
- Fig. 7 shows a further variant of a security element.
- a plurality of phase-shifting layers 44A and 44B having different optical properties are applied to a linearly polarizing carrier film 34.
- the layers 44A, 44B may be formed, for example, by liquid crystal layers having a different orientation direction. In this way, multicolor encodings can be realized in the verification. It is understood that more than two different phase-shifting layers can be used, and that also the other described designs can be provided in an analogous manner with multicolor verification features.
- the authenticity check of a banknote provided with security elements 40 is in Fig. 8 illustrated.
- the banknote 50 has two similar security elements 40-1, 40-2 applied in viewing areas of the banknote, in which the phase-shifting layer 44-1 or 44-2 is respectively in the form of the denomination of the banknote as a number sequence "10".
- the security elements appear structureless and unobtrusive, the coded sequence of digits is not visible. This is indicated in the right security element 40-1 of the figure by the dashed representation of the number sequence 44-1.
- the verification can also be done with a non-metallic good reflector.
- Smooth, colored plastic plates or smooth, colored glass plates are particularly well suited, but even simple, uncolored glass or plastic plates can be used.
- the conspicuousness of the features can be further increased if a dark background is placed behind the transparent glass or plastic panels.
- LCD display devices such as computer monitors, high-quality television sets, and displays in a variety of consumer electronics portable devices.
- LCD display devices emit linearly polarized light, so that the security elements can also be verified by being held on or in front of an LCD display device.
- the security elements described above use as a verification element in each case a separate, for example, metallic background, as it is found everywhere in the environment. The examination of the security element can therefore be carried out by anyone quickly and without any special effort.
- a metallic verification element may also be arranged on the banknote itself, as in the example of US Pat Fig. 9 shown.
- the banknote 60 of the Fig. 9 contains a security element 40 with reference to Fig. 4
- the security strip 62 is typically provided with further security features, not shown in the figure, such as negative writing, optically variable diffraction structures, magnetic coding or the like.
- the security element 40 and the security strip 62 are arranged mirror-symmetrically to the center line 64 of the banknote 60, so that the security element 40 comes to lie on the security strip by folding the banknote around this center line.
- the banknote 60 can therefore be authenticated by simple folding without the need for external verification means. It is understood that the check of the banknote 60 can also take place with a security strip applied to another banknote.
- Fig. 10 shows the basic layer structure of a security element 70, which has one or more layers of liquid-crystalline material.
- the security element 70 includes a transparent support 72, such as a smooth, good surface quality PET film having deposited thereon one or more layers 74 of a cholesteric liquid crystalline material. Between the liquid crystal layers 74, alignment layers and / or adhesive layers 76 may be provided, which serve to align the liquid crystals in the liquid crystal layers or the connection of the individual liquid crystal layers and to compensate for unevennesses.
- the security element 70 appears colorless and structureless. On the other hand, it will be in front of a strongly absorbing dark background considered, the liquid crystal layers produce an intense colored impression. In addition, when viewed against a dark background and changing the viewing angle, a color shift effect becomes visible, which typically changes from a long-wave to a shorter-wave color impression, for example from green to blue, but can also change from a short-wave to a longer-wave color impression when combining several liquid crystal layers from blue or violet to red.
- the liquid crystal layers 74 may also be present only in regions in the form of a lettering or a symbol or they may have corresponding information-containing recesses. The coded information then emerges analogously to the situation described above only when the security element 70 is viewed in front of the predetermined absorbing background.
- Fig. 11 shows a security element 80 according to another example.
- the security element 80 has a transparent carrier 82, which is provided with a mark of authenticity in the form of a transparent thin-film element 84.
- the thin-film element 84 consists of an ultrathin dielectric spacer layer 86, for example a SiO 2 layer 200 nm to 500 nm thick, and of an absorber layer 88 which passes through a 4 nm to 20 nm thick metal layer of chromium, iron, gold, aluminum or Titanium can exist.
- the security element 80 appears transparent and colorless. In contrast, due to interference effects in the sub-layers of the thin-film element 84, before a strongly absorbing background occurs a strong color effect. In addition, the tilting of the security element 80 results in a clearly perceptible color shift effect.
- the dielectric spacer layer 86, or preferably the absorber layer 88 may be as shown in FIG Fig. 11 shown, even present only partially and form a lettering or other coding. The strong color effect and the color shift effect then occur only in the areas in which the absorber layer 88 is present.
- each of the described designs requires a highly absorbing, dark background which is readily available in the ordinary environment.
- a verification element can be arranged on the banknote itself, as with reference to FIG Fig. 12 shown.
- the banknote 90 has a security element 92 arranged in a see-through region, which, for example, like the liquid-crystal-layer security element 70 of FIG Fig. 10 or the thin film security element 80 of Fig. 11 can be trained.
- a dark, absorbent area 94 is arranged on the backside of the banknote 90.
- the surface area 94 does not have to be structureless; it can contain, for example, a dark portrait or another graphic motif in dark shades.
- the security strip 62 of the Fig. 9 can also be the area 94 equipped with other security features.
- the see-through area of the banknote 90 shows a colorless and structureless appearance. If the banknote 90 is folded along its center line 96 and the dark area 94 is folded under the security element 92, the color effect of the security element becomes clear out. In the embodiment, the number sequence "10" appears in clear, bright colors. In addition, when the folded banknote 90 is tilted sideways, a color-shift effect occurs, the extent of which depends on the exact design of the security element 92.
- a planar diffraction structure such as a hologram or a hologram-like diffraction structure
- a likewise transparent embossing lacquer layer 104 is applied to a transparent carrier foil 102 and a desired diffraction structure 106 is embossed.
- a thin-film element 108 is further applied whose layer structure, as shown in FIG Fig. 11 , an ultrathin dielectric spacer layer 110, and an absorber layer 112.
- the relief of the diffraction structure 106 continues in this case in the thin-film element 108 vertically upward.
- the absorber layer 112 is only partially present in this example in order to provide the security element 100 with a lettering or another coding.
- the security element 100 In transmitted light, the security element 100 is perceived as a transparent, structureless surface, neither the color shift effect of the thin-film element 108, nor the diffraction pattern of the diffraction structure 106 noticeably appear. On the other hand, if the security element 100 is viewed in reflected light against a dark, strongly absorbing background, then the diffraction structures 106 clearly emerge in addition to the already described color effect and the color shift effect of the thin-film element 108 and enable the authenticity check of the document provided with the security element 100. Since the security element 100 transparent in transmitted light can not be readjusted with the aid of commercially available color-shifting films or by printing layers with color-shifting pigments.
- the security element can also be provided with a matt structure or a refractive structure of micromirrors or microlenses.
- the security element 120 has a transparent carrier foil 122 with a transparent embossing lacquer layer 124 and a high-indexing coating 126.
- Embossed in the embossing lacquer layer 124 is a desired diffraction structure 128, for example a hologram or a hologram-like relief structure.
- the security element 120 appears essentially as a colorless and featureless see-through window. In reflected light against a dark background, the diffraction structure 128 clearly emerges and thus enables the authentication of the document provided with the security element 120.
- the security elements described so far usually show a rather inconspicuous visual impression in transmitted light and reveal new features when viewed against a predetermined background.
- features that are visible in transmitted light may disappear when placed on a suitable background, or information visible in transmitted light may be supplemented or otherwise altered when viewed against a suitable background. Exemplary embodiments will be described below with reference to FIGS 15 to 20 explained.
- FIGS. 15 and 16 show a banknote 130 with a security element 132 according to the invention, wherein Fig. 15 the banknote in supervision and Fig. 16 a section through the banknote and the security element along the line XVI-XVI shows.
- the security element 132 contains a transparent foil strip 134, which is provided with a black imprint 136, here in the form of the number sequence "10", and a liquid crystal layer 138 applied over it.
- the black imprint 136 may, as in Fig. 16 , be arranged on the top of the film or on its underside.
- a see-through area of the banknote, here a continuous opening 140, is completely covered by the film strip 134.
- the black imprint 136 within the see-through area 140 is clearly visible, while disappearing for the viewer when placing the banknote on a dark, especially black background due to the then lack of contrast.
- the entire opening 140 appears rather over the entire surface with a uniform characteristic glimmer, which comes from the liquid crystal layer 138.
- FIGS. 17 and 18 Another variant is in the FIGS. 17 and 18 shown, where Fig. 17 a plan view of a banknote 150 with a security element according to the invention and Fig. 18 show a section through the banknote and the security element along the line XVIII-XVIII.
- the banknote 150 was provided in the papermaking with through holes 152 and 156 with a characteristic deckle edge which is not replicable by cutting or punching.
- the bill is provided in a surrounding area of the first opening 152 with a black imprint 154, while the second opening 156 two spaced, formed by black imprints areas 158 connects.
- the openings 152 and 156 and the associated imprints 154 and 158 are covered by a transparent film strip 160 provided with a liquid crystal layer 162. It is understood that the black imprints 154 and 158 may be applied to the top or bottom of the film 160 instead of the banknote paper.
- the openings 152 and 156 stand out clearly from the black imprints 154 and 158, respectively.
- the viewing impression changes:
- the opening 152 and the imprint 154 then appear as a full-surface square
- the opening 156, together with the imprints 158 forms a continuous dark area.
- all the dark areas each show the characteristic shimmering of the liquid crystal layer 162.
- Illustrated designs can be used to display or disappear, change or supplement information encoded in a security element in the background change.
- Exemplary shows Fig. 19 a banknote 170 having a security element 172 of FIG Fig. 17
- the banknote 170 has four through-openings 174 and five black printing areas 176, which correspond to one another to represent the desired information, in the exemplary embodiment the number sequence "20", supplement.
- the area of the openings 174 and the black pressure areas 176 is covered with a transparent, liquid-crystal-coated film 178.
- the apertures 174 When viewed against a light background, the apertures 174 appear bright, while the black print areas 176 appear dark, so that the digit sequence is not recognizable as such. On the other hand, when viewed against a dark background, the regions 174 and 176 appear equally dark, so that the digit string "20" then clearly emerges as a whole.
- the banknote 180 shown there has a see-through area 182 which is covered with a transparent film 184.
- the film 184 is provided in a portion with a liquid crystal layer 186 in the form of the left half of the numeral "8".
- the region of the banknote containing the imprint 188 is additionally overprinted with a liquid crystal layer 190.
- the black imprint 188 can be seen on the banknote, which represents only a part of the overall information.
- the liquid crystal region 186 is hardly or not at all visible. Only when placed on a black background, the entire figure "8" appears due to the characteristic shimmering of the liquid crystals.
- the liquid-crystalline material of Embodiments 15 to 20 may be, for example, in the form of pigments embedded in a binder matrix available.
- the liquid-crystal layers can also be completely or partially structured and formed, for example, in the form of hatching.
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- Business, Economics & Management (AREA)
- Accounting & Taxation (AREA)
- Finance (AREA)
- Engineering & Computer Science (AREA)
- Computer Vision & Pattern Recognition (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Credit Cards Or The Like (AREA)
- Inspection Of Paper Currency And Valuable Securities (AREA)
- Burglar Alarm Systems (AREA)
- Polarising Elements (AREA)
Description
Die Erfindung betrifft ein Sicherheitselement zur Absicherung von Sicherheitspapieren, Wertdokumenten und dergleichen mit einem transparenten oder transluzenten Träger. Die Erfindung betrifft ferner eine Sicherheitsanordnung mit einem solchen Sicherheitselement sowie ein entsprechend ausgestattetes SicherheitsdokumentThe invention relates to a security element for securing security papers, documents of value and the like with a transparent or translucent carrier. The invention further relates to a security arrangement with such a security element as well as a correspondingly equipped security document
Durchsichtsfenster in Banknoten sind im Bereich von Polymernoten seit längerem bekannt. Das Versehen einer Banknote mit einem Durchsichtsfenster alleine bietet allerdings noch keine zusätzliche Fälschungssicherheit für die Note. Daher sind verschiedene Sicherheitsmerkmale für Durchsichtsfenster vorgeschlagen und teilweise auch in Banknoten umgesetzt worden.Transparency windows in bank notes have long been known in the field of polymer notes. Providing a banknote with a see-through window on its own, however, does not yet provide additional counterfeit security for the note. Therefore, various security features have been proposed for see-through windows and partly also converted into banknotes.
Beispielsweise beschreibt die Druckschrift
Weitere bekannte Gestaltungen sind in den Druckschriften
Häufig und in gegenwärtig noch zunehmendem Maß werden die Sicherheitsmerlanale für Durchsichtsfenster so gestaltet, dass mehr oder weniger komplizierte Hilfsmittel zur Echtheitsprüfung des im Fenster angeordneten Sicherheitsmerkmals erforderlich sind. Typischerweise werden für die Echtheitsprüfung externe UV-Lampen, Polarisationsfilter, Moire-Filter oder sogar Laserquellen benötigt, die durch das Durchsichtsfenster leuchten, um das Sicherheitsmerkmal zu verifizieren.Often, and to an even greater extent, security windows for privacy windows are designed to require more or less complicated means for checking the authenticity of the security feature located in the window. Typically, external UV lamps, polarizing filters, Moire filters or even authenticity testing are used Laser sources needed to shine through the see-through window to verify the security feature.
Komplizierte Hilfsmittel sind jedoch nicht immer verfügbar und die damit durchgeführte Echtheitsprüfung ist oftmals relativ zeitaufwändig. Dabei wird vom Benutzer bereits eine Prüfung, die mehrere Sekunden dauert, als zeitraubend und störend empfunden. Auf die Echtheitsprüfung wird dann in vielen Fällen ganz verzichtet, so dass die Schutzwirkung des Sicherheitsmerkmals ins Leere läuft.However, complicated tools are not always available and the authenticity check that is performed is often relatively time consuming. The user already feels that a test lasting several seconds is time-consuming and annoying. The authenticity check is then completely dispensed with in many cases, so that the protective effect of the security feature runs into the void.
Davon ausgehend liegt der Erfindung die Aufgabe zugrunde, ein gattungsgemäßes Sicherheitselement anzugeben, das die Nachteile des Stands der Technik vermeidet. Insbesondere soll das Sicherheitselement schwer nachzustellen sein und mit einfachen, nahezu überall verfügbaren Hilfsmitteln auf Echtheit geprüft werden können.On this basis, the invention has for its object to provide a generic security element that avoids the disadvantages of the prior art. In particular, the security element should be difficult to adjust and can be checked for authenticity with simple, almost everywhere available aids.
Diese Aufgabe wird durch das Sicherheitselement mit den Merkmalen des Hauptanspruchs gelöst. Eine Sicherheitsanordnung mit einem solchen Sicherheitselement sowie ein entsprechendes Sicherheitsdokument sind in den Ansprüchen 11 und 13 definiert. Weiterbildungen der Erfindung sind Gegenstand der Unteransprüche.This object is achieved by the security element having the features of the main claim. A security arrangement with such a security element and a corresponding security document are defined in claims 11 and 13. Further developments of the invention are the subject of the dependent claims.
Nach der Erfindung ist der transparente oder transluzente Träger des Sicherheitselements mit einem Echtheitskennzeichen versehen, das im Durchlicht einen ersten optischen Eindruck vermittelt und im Auflicht vor einem vorbestimmten und leicht zugänglichen Hintergrund einen zweiten optischen Eindruck vermittelt, der sich von dem ersten optischen Eindruck signifikant unterscheidet. Dies ermöglicht eine einfache und schnelle Echtheitsprüfung, bei der das Sicherheitselement zunächst im Durchlicht betrachtet und dann vor einen vorbestimmten Hintergrund gehalten wird. Hebt sich der zweite optische Eindruck in gravierender Weise vom ersten optischen Eindruck ab, oder treten gar neue Strukturen oder optische Effekte in Erscheinung, kann die Banknote vom Benutzer als echt bewertet werden.According to the invention, the transparent or translucent carrier of the security element is provided with a mark of authenticity, which transmits a first optical impression in transmitted light and conveys a second optical impression in reflected light in front of a predetermined and easily accessible background, which differs significantly from the first optical impression. This allows a simple and fast authenticity check, in which the security element initially considered in transmitted light and then held in front of a predetermined background. If the second optical impression differs gravely from the first optical impression, or even new structures or optical effects appear, the banknote can be evaluated by the user as genuine.
Erfindungsgemäß ist vorgesehen, dass das Echtheitskennzeichen im Durchlicht Muster, Zeichen oder Codierungen zeigt. Dabei verändern sich das Erscheinungsbild oder die von den Mustern, Zeichen oder Codierungen dargestellte Information im Auflicht vor dem vorbestimmten Hintergrund signifikant oder sie verschwinden vollständig.According to the invention, it is provided that the authenticity mark in the transmitted light pattern, Shows signs or encodings. At the same time, the appearance or the information represented by the patterns, characters or codes change significantly in incident light in front of the predetermined background or disappear completely.
In allen Gestaltungen kann zusätzlich eine Druckschicht vorgesehen sein, die im Auflicht oder Durchlicht zusammen mit Mustern, Zeichen oder Codierungen des Echtheitskennzeichens eine Gesamtinformation ergibt. Beim Wechsel von Durchlicht- zu Auflichtbetrachtung oder von Auflicht- zu Durchlichtbetrachtung kann die Gesamtinformation erscheinen oder verschwinden, oder sie wird verändert, insbesondere ergänzt.In all configurations, a printing layer may additionally be provided, which together with patterns, symbols or codes of the authenticity indicator gives overall information in incident or transmitted light. When changing from transmitted light to incident light observation or from reflected light to transmitted light observation, the overall information may appear or disappear, or it may be changed, in particular supplemented.
Alternativ oder zusätzlich zu einer Änderung von Farbton und/oder Farbintensität zeigt das Echtheitskennzeichen im Auflicht vor dem vorbestimmten Hintergrund einen optisch variablen Effekt. Dabei kann es sich beispielsweise um einen betrachtungswinkelabhängigen Farbkippeffekt handeln, der dem Betrachter einen sich mit der Betrachtungsrichtung ändernden Farbeindruck vermittelt. Auch Beugungseffekte, streuende Effekte, insbesondere von einer Mattierung herrührend, und refraktive Effekte, insbesondere von Mikrolinsen und/oder Mikrospiegeln hervorgerufen, kommen infrage.As an alternative or in addition to a change in hue and / or color intensity, the authenticity mark in incident light in front of the predetermined background exhibits an optically variable effect. This may, for example, be a viewing-angle-dependent color-shift effect, which conveys to the viewer a color impression which changes with the viewing direction. Diffraction effects, scattering effects, in particular resulting from matting, and refractive effects, in particular caused by microlenses and / or micromirrors, are also possible.
Das Echtheitskennzeichen enthält oder mehrere Schichten aus flüssigkristallinem Material, insbesondere aus cholesterischem flüssigkristallinem Material. Die Flüssigkristallschichten sind im Durchlicht transparent und im Wesentlichen farblos, treten aber vor einem stark absorbierenden dunklen Hintergrund mit intensiven Farben in Erscheinung. Darüber erzeugen sie beim seitlichen Kippen des Sicherheitselements aus der Senkrechten einen Farbkippeffekt, der je nach Gestaltung von einem langwelligen zu einem kürzerwelligen Farbeindruck, oder umgekehrt von einem kurzwelligen zu einem längerwelligen Farbeindruck wechseln kann. Die Flüssigkristallschichten liegen vorteilhaft in Form von Mustern, Zeichen oder Codierungen vor.The authenticity mark contains or more layers of liquid-crystalline material, in particular of cholesteric liquid-crystalline material. The liquid crystal layers are transparent in transmitted light and substantially colorless, but appear in front of a strongly absorbing dark background with intense colors in appearance. Moreover, when the security element is tilted sideways from the vertical, they produce a color shift effect which, depending on the design, can change from a long-wave to a shorter-wave color impression, or vice versa, from a short-wave to a longer-wave color impression. The liquid crystal layers are advantageously in the form of patterns, characters or codes.
Die Erfindung enthält auch eine Sicherheitsanordnung zur Absicherung von Sicherheitspapieren, Wertdokumenten und dergleichen, die neben einem Sicherheitselement der oben beschriebenen Art ein Verifikationselement aufweist, das den vorbestimmten Hintergrund für die Betrachtung des Sicherheitselements im Auflicht bereitstellt. Dabei weist das Verifikationselement einen stark absorbierenden, dunklen Flächenbereich auf. Auch dieser absorbierende Flächenbereich kann mit weiteren Sicherheitsmerkmalen, beispielsweise einer Magnetcodierung, versehen sein.The invention also includes a security arrangement for securing security papers, documents of value and the like which, in addition to a security element of the type described above, has a verification element which provides the predetermined background for viewing the security element in reflected light. In this case, the verification element has a strongly absorbing, dark surface area. This absorbing surface area can also be provided with further security features, for example a magnetic coding.
Ist ein Sicherheitsdokument mit einer derartigen Sicherheitsanordnung ausgestattet, kann die Echtheitsprüfung auch stets mit dem Verifikationselement der Sicherheitsanordnung erfolgen. In einer speziellen Ausgestaltung ist dabei vorgesehen, dass eine beschädigungslose Prüfung des Echtheitskennzeichens einer Sicherheitsanordnung ausschließlich mit einem Verifikationselement einer auf einem anderen Sicherheitsdokument angeordneten Sicherheitsanordnung durchführbar ist. Der Benutzer ist zur Durchführung der Echtheitsprüfung dann gezwungen, ein zweites gleichartiges Sicherheitsdokument zur Hand zu nehmen.If a security document is equipped with such a security arrangement, the authenticity check can always be carried out with the verification element of the security arrangement. In a special embodiment, it is provided that a damage-free examination of the authenticity mark of a security arrangement can be carried out exclusively with a verification element of a security arrangement arranged on another security document. The user is then forced to carry out the authenticity check to take a second similar security document to hand.
Die Erfindung umfasst ferner ein Sicherheitsdokument, wie ein Sicherheitspapier, Wertdokument oder dergleichen, mit einem Sicherheitselement oder einer Sicherheitsanordnung der beschriebenen Art. In letzterem Fall sind das Echtheitskennzeichen und das Verifikationselement geometrisch so auf dem Sicherheitsdokument angeordnet, dass das Echtheitskennzeichen durch Biegen oder Falten des Sicherheitsdokuments über das Verifikationselement bringbar ist.The invention further comprises a security document, such as a security paper, value document or the like, with a security element or a security arrangement of the type described. In the latter case, the authenticity flag and the verification element are geometrically arranged on the security document such that the authenticity flag is formed by bending or folding the security document can be brought over the verification element.
Das Sicherheitsdokument weist mit Vorteil ein Papier- oder Kunststoffsubstrat auf. Bevorzugt ist das Echtheitsmerkmal in oder über einem Fensterbereich oder einer durchgehenden Öffnung des Sicherheitsdokuments angeordnet. Weist das Sicherheitsdokument ein Kunststoffsubstrat auf, so ist das Echtheitskennzeichen vorteilhaft über einem transparenten oder transluzenten, insbesondere unbedruckten Bereich des transparenten oder transluzenten Kunststoffsubstrats aufgebracht.The security document advantageously has a paper or plastic substrate. The authenticity feature is preferably arranged in or above a window area or a through opening of the security document. If the security document has a plastic substrate, then the authenticity mark is advantageously applied over a transparent or translucent, in particular unprinted, area of the transparent or translucent plastic substrate.
Im Fall eines Papiersubstrats ist das Echtheitskennzeichen vorzugsweise über einer durchgehenden Öffnung des Papiersubstrats aufgebracht oder papiermacherisch in eine solche Öffnung eingebracht. Die durchgehende Öffnung kann dabei während der Papierherstellung ohne eine scharfe Begrenzungskante ihres Randbereichs erzeugt sein, so dass ein charakteristischer Büttenrand entsteht, der durch Schneiden oder Stanzen nicht nachzubilden ist.In the case of a paper substrate, the mark of authenticity is preferably applied over a continuous opening of the paper substrate or introduced paper-like in such an opening. The continuous opening can be produced during papermaking without a sharp boundary edge of its edge region, so that a characteristic deckle edge is created, which is not replicate by cutting or punching.
Das Sicherheitsdokument stellt insbesondere ein Sicherheitspapier oder ein Wertdokument, wie eine Banknote, einen Scheck, eine Ausweiskarte, eine Urkunde oder dergleichen, dar.The security document represents, in particular, a security paper or a value document, such as a banknote, a check, an identity card, a document or the like.
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, in the representation of which a representation true to scale and proportion has been dispensed with in order to increase the clarity.
Es zeigen:
- Fig. 1
- eine schematische Darstellung einer Banknote mit einem Durchsichtsbereich, über dem ein Sicherheitselement angeordnet ist,
- Fig. 2
- den Schichtaufbau eines Sicherheitselements im Querschnitt,
- Fig. 3 bis 7
- Schnittdarstellungen von weiteren Sicherheitselementen
- Fig. 8
- die Echtheitsprüfung einer mit zwei Sicherheitselementen nach
Fig. 4 versehenen Banknote vor einem metallischen Hintergrund, - Fig. 9
- eine Banknote mit einer Sicherheitsanordnung mit einem Sicherheitselement nach
Fig. 4 und einem durch einen Sicherheitsstreifen gebildeten Verifikationselement, - Fig. 10 und 11
- Schnittdarstellungen von weiteren Sicherheitselementen
- Fig.12
- eine Banknote mit einer Sicherheitsanordnung mit einem Sicherheitselement nach
Fig. 10 oder 11 und einem durch einen dunklen Flächenbereich gebildeten Verifikationselement, - Fig. 13 und 14
- Schnittdarstellungen von weiteren Sicherheitselementen
- Fig. 15
- eine Banknote mit einem Sicherheitselement nach noch einem weiteren Ausführungsbeispiel in Aufsicht,
- Fig. 16
- einen Querschnitt durch die Banknote und das Sicherheitselement von
Fig. 15 entlang der Linie XVI-XVI, - Fig. 17
- eine Banknote mit einem Sicherheitselement nach einem weiteren Ausführungsbeispiel in Aufsicht,
- Fig. 18
- einen Querschnitt durch die Banknote und das Sicherheitselement von
Fig. 17 entlang der Linie XVIII-XVIII, und - Fig. 19 und 20
- zwei Banknoten mit erfindungsgemäßen Sicherheitselementen nach weiteren Ausführungsbeispielen der Erfindung in Aufsicht.
- Fig. 1
- a schematic representation of a banknote with a see-through area, over which a security element is arranged,
- Fig. 2
- the layer structure of a security element in cross-section,
- Fig. 3 to 7
- Sectional views of other security elements
- Fig. 8
- checking the authenticity of one with two security elements
Fig. 4 provided banknote against a metallic background, - Fig. 9
- a banknote with a security arrangement with a security element after
Fig. 4 and a verification element formed by a security strip, - 10 and 11
- Sectional views of other security elements
- Figure 12
- a banknote with a security arrangement with a security element after
Fig. 10 or 11 and a verification element formed by a dark area, - FIGS. 13 and 14
- Sectional views of other security elements
- Fig. 15
- a banknote with a security element according to yet another embodiment in supervision,
- Fig. 16
- a cross section through the banknote and the security element of
Fig. 15 along the line XVI-XVI, - Fig. 17
- a banknote with a security element according to a further exemplary embodiment in supervision,
- Fig. 18
- a cross section through the banknote and the security element of
Fig. 17 along the line XVIII-XVIII, and - FIGS. 19 and 20
- two banknotes with security elements according to the invention according to further embodiments of the invention in plan view.
Die Erfindung wird nachfolgend am Beispiel einer Banknote erläutert.
Bei Betrachtung der Banknote 10 im Durchlicht vermittelt das Sicherheitselement 14 einen ersten optischen Eindruck, im Ausführungsbeispiel den Eindruck einer strukturlosen und im Wesentlichen farblosen transparenten Fläche. In anderen Ausgestaltungen kann das Sicherheitselement auch so gestaltet sein, dass es im Durchlicht bereits vollflächig eine leichte Färbung mit definiertem Farbeindruck aufweist.When the banknote 10 is viewed in transmitted light, the security element 14 gives a first visual impression, in the exemplary embodiment the impression of a structureless and substantially colorless transparent surface. In other embodiments, the security element can also be designed in such a way that it already has a slight coloration with a defined color impression in transmitted light throughout the entire surface.
Wird die Banknote 10 mit dem Sicherheitselement 14 vor einen Hintergrund der vorbestimmten Art gehalten, so vermittelt das Sicherheitselement 14 einen zweiten optischen Eindruck, der sich von dem ersten optischen Eindruck signifikant unterscheidet. Dieser deutliche Wechsel des Erscheinungsbildes lässt sich für die Echtheitsprüfung der Banknote einsetzen. Wie im Folgenden genauer erläutert, ändert sich beim Übergang von Durchlicht- zu Auflichtbetrachtung beispielsweise der Farbeindruck, also Farbton oder Farbintensität des Sicherheitselements 14 drastisch, es erscheinen oder verschwinden Muster, Zeichen oder Codierungen, oder es zeigt sich ein im Durchlicht nicht erkennbarer, optisch variabler Effekt, wie etwa ein Farbkippeffekt oder ein betrachtungswinkelabhängiges Beugungsbild.If the banknote 10 with the security element 14 is held against a background of the predetermined type, the security element 14 imparts a second optical impression, which differs significantly from the first optical impression. This clear change of appearance can be used for the authenticity of the bill. As will be explained in more detail below, the color impression, ie hue or color intensity of the security element 14 changes drastically during the transition from transmitted to reflected light observation; patterns, signs or codes appear or disappear, or an optically variable one that is not recognizable in transmitted light Effect, such as a color shift effect or a viewing angle dependent diffraction pattern.
Im Durchlicht erscheint das Sicherheitselement 20 transparent und strukturlos. Wird es andererseits vor einem stark reflektierenden Hintergrund, wie einer Metallfläche oder dergleichen, betrachtet, zeigt es deutlich ausgeprägte Farben, deren Intensität und Farbton über die optischen Eigenschaften der phasenschiebenden Schicht 24 und der linear polarisierenden Schicht 26 in weitem Bereich variiert werden können.In transmitted light, the security element 20 appears transparent and structureless. On the other hand, when viewed in front of a highly reflective background such as a metal surface or the like, it shows distinct colors whose intensity and hue can be varied widely over the optical properties of the phase shifting layer 24 and the linear polarizing layer 26.
Im Beispiel hat die Schicht 26 über den gesamten sichtbaren Wellenlängenbereich linear polarisierende Eigenschaften. Als phasenschiebende Schicht 24 ist eine doppelbrechende Schicht eingesetzt, deren Schichtdicke und Differenz der Brechungsindizes von ordentlichem und außerordentlichem Strahl no - ne im Ausführungsbeispiel so gewählt ist, dass sie für rotes Licht mit λ = 640 nm eine λ/4-Schicht darstellt Rotes Licht wird dann von der Schicht 26 linear polarisiert und das linear polarisierte Licht erfährt bei zweimaligem Durchlauf durch die Schicht 24 und zwischenzeitlicher Reflexion an dem metallischen Hintergrund insgesamt eine Phasendrehung von 90°, so dass das zurücklaufende Licht von der linear polarisierenden Schicht 26 blockiert wird. Fällt weißes Licht auf das Sicherheitselement ein, so fehlt dem zurückkommenden Licht nach zweimaligem Durchlauf durch das Sicherheitselement ein großer Teil des roten Lichts, so dass das Sicherheitselement in einem charakteristischen blauen Farbton erscheint. In analoger Weise können durch Wahl der doppelbrechenden Eigenschaften der Schicht 24 bzw. durch Wahl deren Schichtdicke unterschiedliche Farbeffekte erzeugt werden.In the example, the layer 26 has linearly polarizing properties over the entire visible wavelength range. The phase-shifting layer 24 used is a birefringent layer whose layer thickness and difference between the refractive indices of ordinary and extraordinary ray no- e in the exemplary embodiment is chosen such that it represents a λ / 4 layer for red light with λ = 640 nm. Red light is then linearly polarized by the layer 26 and the linearly polarized light undergoes a total of two phase pass through the layer 24 and intermittent reflection on the metallic background, a phase rotation of 90 °, so that the returning light from the linear polarizing layer 26 is blocked. If white light is incident on the security element, the returning light, after passing through the security element twice, lacks a large portion of the red light, so that the security element appears in a characteristic blue hue. In an analogous manner, different color effects can be produced by selecting the birefringent properties of the layer 24 or by selecting its layer thickness.
Bei dem Sicherheitselement 30 des in
Eine weitere Abwandlung ist in
Die Echtheitsprüfung einer mit Sicherheitselementen 40 versehenen Banknote ist in
Die Verifikation kann auch mit einem nichtmetallischen guten Reflektor erfolgen. Glatte, gefärbte Kunststoffplatten oder glatte, gefärbte Glasplatten eignen sich besonders gut, aber auch einfache, ungefärbte Glas- oder Kunststöffplatten können verwendet werden. Die Auffälligkeit der Merkmale kann weiter erhöht werden, wenn hinter den transparenten Glas- oder Kunststoffplatten ein dunkler Hintergrund angeordnet wird.The verification can also be done with a non-metallic good reflector. Smooth, colored plastic plates or smooth, colored glass plates are particularly well suited, but even simple, uncolored glass or plastic plates can be used. The conspicuousness of the features can be further increased if a dark background is placed behind the transparent glass or plastic panels.
Eine weitere Möglichkeit besteht in der Verifikation der Sicherheitselemente mithilfe von LCD-Anzeigevorrichtungen, wie sie als Computermonitore, hochwertige Fewsehgeräte und als Displays in einer Vielzahl tragbarer Geräte aus dem Bereich der Consumerelektronik weit verbreitet sind. Derartige LCD-Anzeigevorrichtungen emittieren linear polarisiertes Licht, so dass die Sicherheitselemente auch verifiziert werden können, indem sie auf oder vor eine LCD-Anzeigevorrichtung gehalten werden bzw. auf das Display gelegt werden.Another possibility is to verify the security features using LCD display devices, such as computer monitors, high-quality television sets, and displays in a variety of consumer electronics portable devices. Such LCD display devices emit linearly polarized light, so that the security elements can also be verified by being held on or in front of an LCD display device.
Die oben beschriebenen Sicherheitselemente nutzen als Verifikationselement jeweils einen separaten, beispielsweise metallischen Hintergrund, wie er in der Umwelt überall anzutreffen ist. Die Prüfung des Sicherheitselements kann daher von jedermann schnell und ohne besonderen Aufwand durchgeführt werden. Ein metallisches Verifikationselement kann jedoch auch auf der Banknote selbst angeordnet sein, wie in dem Beispiel der
Die Banknote 60 der
Die Verschiedenheit der beiden optischen Eindrücke des Sicherheitselements bei Durchlicht- und Auflichtbetrachtung kann auch auf andere Weise sichergestellt werden.
Im Durchlicht betrachtet, erscheint das Sicherheitselement 70 farb- und strukturlos. Wird es dagegen vor einem stark absorbierenden dunklen Hintergrund betrachtet, so erzeugen die Flüssigkristallschichten einen intensiv farbigen Eindruck. Zusätzlich wird bei Betrachtung vor dunklem Hintergrund und Wechsel des Betrachtungswinkels ein Farbkippeffekt sichtbar, der typischerweise von einem langwelligen zu einem kürzerwelligen Farbeindruck, beispielsweise von Grün zu Blau, wechselt, bei Kombination mehrerer Flüssigkristallschichten aber auch von einem kurzwelligen zu einem längerwelligen Farbeindruck wechseln kann, wie etwa von Blau oder Violett zu Rot.Seen in transmitted light, the security element 70 appears colorless and structureless. On the other hand, it will be in front of a strongly absorbing dark background considered, the liquid crystal layers produce an intense colored impression. In addition, when viewed against a dark background and changing the viewing angle, a color shift effect becomes visible, which typically changes from a long-wave to a shorter-wave color impression, for example from green to blue, but can also change from a short-wave to a longer-wave color impression when combining several liquid crystal layers from blue or violet to red.
Die Flüssigkristallschichten 74 können auch nur bereichsweise in Form eines Schriftzugs oder eines Symbols vorliegen oder sie können entsprechende informationshaltige Aussparungen aufweisen. Die codierte Information tritt dann, analog zur oben beschriebenen Situation, erst bei der Betrachtung des Sicherheitselements 70 vor dem vorbestimmten absorbierenden Hintergrund hervor.The liquid crystal layers 74 may also be present only in regions in the form of a lettering or a symbol or they may have corresponding information-containing recesses. The coded information then emerges analogously to the situation described above only when the security element 70 is viewed in front of the predetermined absorbing background.
Im Durchlicht betrachtet erscheint das Sicherheitselement 80 transparent und farblos. Vor einem stark absorbierenden Hintergrund tritt dagegen aufgrund von Interferenzeffekten in den Teilschichten des Dünnschichtelements 84 eine starke Farbwirkung auf. Zusätzlich ergibt sich beim Kippen des Sicherheitselements 80 ein deutlich wahrnehmbarer Farbkippeffekt.Seen in transmitted light, the security element 80 appears transparent and colorless. In contrast, due to interference effects in the sub-layers of the thin-film element 84, before a strongly absorbing background occurs a strong color effect. In addition, the tilting of the security element 80 results in a clearly perceptible color shift effect.
Die dielektrische Abstandsschicht 86 oder vorzugsweise die Absorberschicht 88 können, wie in
Die mit Bezug auf
Die Banknote 90 weist dazu ein in einem Durchsichtsbereich angeordnetes Sicherheitselement 92 auf, das beispielsweise wie das Flüssigkristallschicht-Sicherheitselement 70 der
Im Durchlicht zeigt der Durchsichtsbereich der Banknote 90 ein farb- und strukturloses Erscheinungsbild. Wird die Banknote 90 entlang ihrer Mittelinie 96 gefaltet und der dunkle Flächenbereich 94 so unter das Sicherheitselement 92 geklappt, tritt die Farbwirkung des Sicherheitselements deutlich hervor. Im Ausführungsbeispiel erscheint die Ziffernfolge "10" in klaren, leuchtenden Farben. Zusätzlich tritt beim seitlichen Kippen der gefalteten Banknote 90 ein Farbkippeffekt auf, dessen Ausprägung von der genauen Gestaltung des Sicherheitselements 92 abhängt.In transmitted light, the see-through area of the banknote 90 shows a colorless and structureless appearance. If the banknote 90 is folded along its center line 96 and the dark area 94 is folded under the security element 92, the color effect of the security element becomes clear out. In the embodiment, the number sequence "10" appears in clear, bright colors. In addition, when the folded banknote 90 is tilted sideways, a color-shift effect occurs, the extent of which depends on the exact design of the security element 92.
Bei dem Sicherheitselement 100 des in
Auf die Prägelackschicht 104 ist weiter ein Dünnschichtelement 108 aufgebracht, dessen Schichtaufbau, wie in der
Im Durchlicht wird das Sicherheitselement 100 als transparente, strukturlose Fläche wahrgenommen, weder der Farbkippeffekt des Dünnschichtelementes 108, noch das Beugungsbild der Beugungsstruktur 106 treten merklich in Erscheinung. Wird das Sicherheitselement 100 dagegen im Auflicht vor einem dunklen, stark absorbierenden Hintergrund betrachtet, so treten neben der bereits beschrieben Farbwirkung und dem Farbkippeffekt des Dünnschichtelements 108 auch die Beugungsstrukturen 106 deutlich hervor und ermöglichen die Echtheitsprüfung des mit dem Sicherheitselement 100 versehenen Dokuments. Da das Sicherheitselement 100 im Durchlicht transparent sein muss, kann es nicht mit Hilfe handelsüblicher farbkippender Folien oder durch Druckschichten mit farbkippenden Pigmenten nachgestellt werden.In transmitted light, the security element 100 is perceived as a transparent, structureless surface, neither the color shift effect of the thin-film element 108, nor the diffraction pattern of the diffraction structure 106 noticeably appear. On the other hand, if the security element 100 is viewed in reflected light against a dark, strongly absorbing background, then the diffraction structures 106 clearly emerge in addition to the already described color effect and the color shift effect of the thin-film element 108 and enable the authenticity check of the document provided with the security element 100. Since the security element 100 transparent in transmitted light can not be readjusted with the aid of commercially available color-shifting films or by printing layers with color-shifting pigments.
Anstelle der Beugungsstruktur kann das Sicherheitselement auch mit einer Mattstruktur oder einer refraktiven Struktur aus Mikrospiegeln oder Mikrolinsen versehen sein.Instead of the diffraction structure, the security element can also be provided with a matt structure or a refractive structure of micromirrors or microlenses.
Die bisher beschriebenen Sicherheitselemente zeigen im Durchlicht zumeist einen eher unauffälligen optischen Eindruck und lassen bei Betrachtung vor einem vorbestimmten Hintergrund neue Merkmale erkennen. Erfindungsgemäß können Merkmale, die im Durchlicht sichtbar sind, beim Auflegen auf einen geeigneten Hintergrund verschwinden, oder eine im Durchlicht sichtbare Information kann bei Betrachtung vor einem geeigneten Hintergrund ergänzt oder auf andere Weise verändert werden. Beispielhafte Ausgestaltungen werden nachfolgend mit Bezug auf die
Bei Betrachtung der Banknote gegen einen hellen Hintergrund ist der schwarze Aufdruck 136 innerhalb des Durchsichtsbereichs 140 deutlich sichtbar, dagegen verschwindet er für den Betrachter beim Auflegen der Banknote auf einen dunklen, insbesondere schwarzen Hintergrund aufgrund des dann fehlenden Kontrasts. Nach dem Auflegen erscheint die gesamte Öffnung 140 vielmehr vollflächig mit einem gleichmäßigen charakteristischen Schimmern, das von der Flüssigkristallschicht 138 herrührt.When viewing the banknote against a light background, the black imprint 136 within the see-through area 140 is clearly visible, while disappearing for the viewer when placing the banknote on a dark, especially black background due to the then lack of contrast. After laying, the entire opening 140 appears rather over the entire surface with a uniform characteristic glimmer, which comes from the liquid crystal layer 138.
Eine weitere Variante ist in den
Weiter ist die Banknote in einem Umgebungsbereich der ersten Öffnung 152 mit einem schwarzen Aufdruck 154 versehen, während die zweite Öffnung 156 zwei beabstandete, durch schwarze Aufdrucke gebildete Bereiche 158 verbindet. Die Öffnungen 152 und 156 und die zugehörigen Aufdrucke 154 und 158 sind von einem mit einer Flüssigkristallschicht 162 versehenen transparenten Folienstreifen 160 überdeckt. Es versteht sich, dass die schwarzen Aufdrucke 154 bzw. 158 anstatt auf dem Banknotenpapier auch auf der Ober- oder Unterseite der Folie 160 aufgebracht sein können.Further, the bill is provided in a surrounding area of the first opening 152 with a black imprint 154, while the second opening 156 two spaced, formed by black imprints areas 158 connects. The openings 152 and 156 and the associated imprints 154 and 158 are covered by a transparent film strip 160 provided with a liquid crystal layer 162. It is understood that the black imprints 154 and 158 may be applied to the top or bottom of the film 160 instead of the banknote paper.
Alternativ zu den schwarzen Aufdrucken ist es auch möglich, ein Patch, z.B. mittels Heißprägeverfahren, platziert aufzubringen. Selbstverständlich gilt dies auch für sämtliche andere Ausführungsformen.As an alternative to the black imprints, it is also possible to use a patch, e.g. applied by hot embossing, placed. Of course, this also applies to all other embodiments.
Vor einem hellen Hintergrund heben sich die Öffnungen 152 und 156 deutlich von den schwarzen Aufdrucken 154 bzw. 158 ab. Bei Betrachtung vor einem dunklen, insbesondere schwarzen Hintergrund verändert sich der Betrachtungseindruck: Die Öffnung 152 und der Aufdruck 154 erscheinen dann als vollflächiges Quadrat, die Öffnung 156 bildet zusammen mit den Aufdrucken 158 eine durchgehende dunkle Fläche. Alle dunklen Flächenbereiche zeigen darüber hinaus jeweils das charakteristische Schimmern der Flüssigkristallschicht 162.Against a light background, the openings 152 and 156 stand out clearly from the black imprints 154 and 158, respectively. When viewed against a dark, especially black background, the viewing impression changes: The opening 152 and the imprint 154 then appear as a full-surface square, the opening 156, together with the imprints 158, forms a continuous dark area. Moreover, all the dark areas each show the characteristic shimmering of the liquid crystal layer 162.
Die in den
Exemplarisch zeigt
Bei Betrachtung gegen einen hellen Hintergrund erscheinen die Öffnungen 174 hell, die schwarzen Druckbereiche 176 dagegen dunkel, so dass die Zifferfolge nicht als solche erkennbar ist. Bei Betrachtung gegen einen dunklen Hintergrund erscheinen die Bereiche 174 und 176 dagegen gleichermaßen dunkel, so dass die Ziffernfolge "20" dann als Ganzes deutlich hervortritt.When viewed against a light background, the apertures 174 appear bright, while the black print areas 176 appear dark, so that the digit sequence is not recognizable as such. On the other hand, when viewed against a dark background, the regions 174 and 176 appear equally dark, so that the digit string "20" then clearly emerges as a whole.
Ein anderer Effekt wird bei dem Ausführungsbeispiel der
Vor einem hellen Hintergrund ist lediglich der schwarze Aufdruck 188 auf der Banknote zu erkennen, der nur einen Teil der Gesamtinformation darstellt. Der Flüssigkristallbereich 186 ist dagegen kaum oder gar nicht sichtbar. Erst beim Auflegen auf einen schwarzen Hintergrund tritt durch das charakteristische Schimmern der Flüssigkristalle die gesamte Ziffer "8" in Erscheinung.Against a light background only the black imprint 188 can be seen on the banknote, which represents only a part of the overall information. On the other hand, the liquid crystal region 186 is hardly or not at all visible. Only when placed on a black background, the entire figure "8" appears due to the characteristic shimmering of the liquid crystals.
Das flüssigkristalline Material der Ausführungsbeispiele 15 bis 20 kann beispielsweise in Form von in eine Bindemittelmatrix eingebetteten Pigmenten vorliegen. Die Flüssigkristallschichten können auch ganz oder teilweise strukturiert sein und beispielsweise in Form einer Schraffur gebildet sein.The liquid-crystalline material of Embodiments 15 to 20 may be, for example, in the form of pigments embedded in a binder matrix available. The liquid-crystal layers can also be completely or partially structured and formed, for example, in the form of hatching.
Claims (22)
- A security element (132) for securing security papers, value documents and the like, having a transparent or translucent substrate (134; 160), characterized in that- the transparent or translucent substrate (134; 160) is provided with an authenticating mark which includes one or more layers (138; 162) composed of liquid crystal material and an imprint (136;154,158) in the form of patterns, characters or codes,- that the authenticating mark, in transmitted light, imparts a first optical impression, in particular that the authenticating mark displays patterns, characters or codes in transmitted light, and- that the authenticating mark in reflected light against a predefined and easily accessible background, formed by a highly absorptive, dark surface, imparts a second optical impression differing significantly from the first optical impression, namely that firstly in reflected light against the highly absorptive, dark surface, the authenticating mark displays an optically variable effect and that secondly in reflected light against the highly absorptive, dark surface the appearance or the information content of the patterns, characters or codes of the authenticating mark are significantly changed, or that the patterns, characters or codes completely disappear.
- The security element (132) according to claim 1, characterized in that a printing layer is provided that, in reflected light or transmitted light, yields, together with patterns, characters or codes of the authenticating mark, an aggregate piece of information.
- The security element (132) according to claim 2, characterized in that, when switched from transmitted light view to reflected light view or from reflected light view to transmitted light view, the aggregate piece of information appears, disappears, or is changed, especially is complemented.
- The security element (132) according to at least one of claims 1 to 3, characterized in that one or more effects from the group: diffraction effects, viewing-angle-dependent color-shift effects, scattering effects, especially stemming from a matte finish, and refractive effects, especially caused by microlenses and/ or micromirrors, is used as the optically variable effect.
- The security element (132) according to at least one of claims 1 to 4, wherein the authenticating mark includes one or more layers composed of cholesteric liquid crystal material.
- The security element (132) according to at least one of claims 1 to 5, characterized in that the one or more liquid crystal layers are present in the form of patterns, characters or codes.
- The security element (132) according to at least one of claims 1 to 6, characterized in that the authenticating mark includes an areal diffraction pattern.
- The security element (132) according to claim 7, characterized in that the areal diffraction pattern exhibits an embossing pattern disposed on the substrate (134).
- The security element (132) according to claim 8, characterized in that the embossing pattern is provided with a high-index coating.
- The security element (132) according to at least one of claims 1 to 9, characterized in that the authenticating mark includes a matte finish, an arrangement composed of microlenses or an arrangement composed of micromirrors.
- A security arrangement for securing security papers, value documents and the like, having a security element (132) according to any one of claims 1 to 10 and a verification element that provides a highly absorptive, dark surface for viewing the security element (132) in reflected light.
- The security arrangement according to claim 11, characterized in that a damageless check of the authenticating mark of a security arrangement is practicable solely with a verification element of a security arrangement disposed on another security document.
- A security document (130; 150), such as a security paper, value document or the like, having a security element (132) according to at least one of claims 1 to 10.
- A security document (130; 150), such as a security paper, value document or the like, having a security arrangement according to at least one of claims 11 to 12.
- The security document (130; 150) according to claim 14, characterized in that the authenticating mark and the verification element are so geometrically disposed on the security document that the authenticating mark is bringable over the verification element by bending or folding the security document.
- The security document (130; 150) according to at least one of claims 13 to 15, characterized in that the security document exhibits a paper or plastic substrate.
- The security document (130; 150) according to at least one of claims 13 to 16, characterized in that the authenticating mark is disposed in or over a window area or a through opening (140;152,156) in the security document.
- The security document (130; 150) according to claim 17, characterized in that the security document exhibits a plastic substrate and the authenticating mark is applied over a transparent or translucent, especially unprinted, area of the plastic substrate.
- The security document (130; 150) according to claim 17, characterized in that the security document exhibits a paper substrate and the authenticating mark is applied over a through opening (140;152,156) in the paper substrate.
- The security document (130; 150) according to claim 17, characterized in that the security document exhibits a paper substrate and the authenticating mark is introduced into a through opening (140;152,156) in the paper substrate with papermaking technology.
- The security document (130; 150) according to claim 19 or 20, characterized in that the through opening (152, 156) is produced during paper manufacture without a sharp boundary edge of its border area.
- The security document (130; 150) according to at least one of claims 17 to 21, characterized in that the security document is a security paper or a value document.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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PL05770248T PL1778501T5 (en) | 2004-08-12 | 2005-08-08 | Security element comprising a support |
Applications Claiming Priority (3)
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DE102004039355A DE102004039355A1 (en) | 2004-08-12 | 2004-08-12 | Security element and method for its production |
DE102004051919A DE102004051919A1 (en) | 2004-10-25 | 2004-10-25 | Security element for security of documents has support with authenticity feature giving different optical impressions in different light |
PCT/EP2005/008567 WO2006018171A2 (en) | 2004-08-12 | 2005-08-08 | Security element comprising a support |
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EP1778501A2 EP1778501A2 (en) | 2007-05-02 |
EP1778501B1 true EP1778501B1 (en) | 2013-07-31 |
EP1778501B2 EP1778501B2 (en) | 2018-09-26 |
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EP05770248.2A Active EP1778501B2 (en) | 2004-08-12 | 2005-08-08 | Security element comprising a support |
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US (1) | US20070246933A1 (en) |
EP (1) | EP1778501B2 (en) |
AU (1) | AU2005274464C1 (en) |
BR (1) | BRPI0515003A (en) |
CA (1) | CA2577208C (en) |
ES (1) | ES2428360T5 (en) |
MX (1) | MX2007001545A (en) |
PL (1) | PL1778501T5 (en) |
RU (1) | RU2381907C2 (en) |
WO (1) | WO2006018171A2 (en) |
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- 2005-08-08 BR BRPI0515003-5A patent/BRPI0515003A/en not_active Application Discontinuation
- 2005-08-08 MX MX2007001545A patent/MX2007001545A/en active IP Right Grant
- 2005-08-08 ES ES05770248T patent/ES2428360T5/en active Active
- 2005-08-08 AU AU2005274464A patent/AU2005274464C1/en not_active Ceased
- 2005-08-08 PL PL05770248T patent/PL1778501T5/en unknown
- 2005-08-08 RU RU2007108437/12A patent/RU2381907C2/en active
- 2005-08-08 EP EP05770248.2A patent/EP1778501B2/en active Active
- 2005-08-08 CA CA2577208A patent/CA2577208C/en not_active Expired - Fee Related
- 2005-08-08 US US11/573,484 patent/US20070246933A1/en not_active Abandoned
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Also Published As
Publication number | Publication date |
---|---|
AU2005274464A1 (en) | 2006-02-23 |
RU2007108437A (en) | 2008-09-20 |
AU2005274464B2 (en) | 2011-02-10 |
CA2577208C (en) | 2015-10-13 |
MX2007001545A (en) | 2007-06-25 |
PL1778501T3 (en) | 2013-12-31 |
ES2428360T3 (en) | 2013-11-07 |
PL1778501T5 (en) | 2019-02-28 |
EP1778501A2 (en) | 2007-05-02 |
BRPI0515003A (en) | 2008-07-01 |
WO2006018171A3 (en) | 2006-07-13 |
EP1778501B2 (en) | 2018-09-26 |
CA2577208A1 (en) | 2006-02-23 |
WO2006018171A2 (en) | 2006-02-23 |
US20070246933A1 (en) | 2007-10-25 |
RU2381907C2 (en) | 2010-02-20 |
AU2005274464C1 (en) | 2013-07-25 |
ES2428360T5 (en) | 2019-04-16 |
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