EP3793839B1 - Sicherheitselement mit mikroreflektoren - Google Patents

Sicherheitselement mit mikroreflektoren Download PDF

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Publication number
EP3793839B1
EP3793839B1 EP19726574.7A EP19726574A EP3793839B1 EP 3793839 B1 EP3793839 B1 EP 3793839B1 EP 19726574 A EP19726574 A EP 19726574A EP 3793839 B1 EP3793839 B1 EP 3793839B1
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EP
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Prior art keywords
motif
security element
tilt angle
angle range
element according
Prior art date
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EP19726574.7A
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German (de)
English (en)
French (fr)
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EP3793839A1 (de
Inventor
Kai Hermann SCHERER
Maik Rudolf Johann SCHERER
Raphael DEHMEL
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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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
    • B42D25/324—Reliefs

Definitions

  • the invention relates to a flat security element with microreflectors for the production of documents of value, such as banknotes, checks or the like, wherein the flat security element defines a main plane and the microreflectors are arranged in a microreflector pattern and in a plan view of the flat security element when tilted about an axis, a first and present a second motif, the first motif being perceptible only in a first tilt angle range and the second motif in a second tilt angle range.
  • Such a security element is in particular from the publication WO 2014/060089 A2 known.
  • the first and the second motif are different here, so that when the security element is tilted, the view changes from the first motif to the second motif or from a first view that appears curved to a second view that appears curved.
  • the microreflectors are arranged in a microreflector pattern, so that the planar security element is divided into a multiplicity of pixels, each of which comprises at least one optically effective facet, ie at least one microreflector.
  • the microreflector patterns of the two motifs are interleaved with simultaneous rescaling of the microreflector or micromirror alignments.
  • a security element can be produced that gives the impression that a static, three-dimensional motif is changing abruptly.
  • the configurations provided can also be such that both representations are visible at the same time in a certain tilting angle range.
  • the flat shape of the security element defines a main level.
  • effects are known in which one or more motifs show a dynamic behavior when the security element is tilted in a broader sense, but in doing so retain their shape essentially unchanged.
  • the directions of tilting movement and "movement" are the same or opposite (paralactic).
  • the two eyes of a viewer see the motifs at the same time in slightly different positions, which creates a spatial impression or a floating effect.
  • Stereographic effects of this type can be produced, for example, with a security element, as described in the publication WO 2016/180522 A1 is described.
  • Floating motifs are also from the publication WO 2012/048847 A1 known.
  • a display element is described therein which is designed and determined in such a way that, when illuminated, a light spot image is generated from a plurality of light spots which appear to an observer to be floating above or below the surface area and which are arranged in the form of a predetermined motif.
  • At least one reflective optical element is assigned to each light spot of the light spot image, which, when illuminated, contributes to the production of the light spot assigned to it.
  • the motif can also be an alternating image that shows different images from different viewing directions.
  • microreflectors it is also known in the prior art to use microreflectors to present motifs in a plan view that show non-stereographic motif movement effects. See the publications as an example WO 2011/066991 A2 and WO 2015/078572 A1 referred.
  • the microreflectors are in particular designed in such a way that their orientation changes continuously or step by step along one direction, so that when the security element is tilted, a viewer sees a bright light reflection that travels along the direction of change. When the security element is tilted, the motif thus has a movement effect that is related to the main plane.
  • the pamphlet U.S. 2017/0021660 A1 deals with an optical security component.
  • the security component comprises a structure having a first pattern which is modulated by a second pattern such that the first pattern comprises a bas-relief with a first set of facets in at least a first region, and the second pattern forms a first sub-wavelength grating which as a first wavelength subtractive filter works.
  • the security component includes, in a first region, a first set of facets forming a first concave or convex cylindrical reflective element having a first longitudinal axis.
  • the first set of facets is modulated to form a particular color with a first sub-wavelength grating to form a wavelength subtractive filter to form a particular color.
  • the first pattern of the structure consists of a planar surface and the second pattern is formed by one or more sub-wavelength gratings.
  • microreflectors that show a change depending on the tilt angle are difficult to reproduce, since the change cannot usually be achieved with conventional printing techniques. At the same time, the change is recognizable for the normal viewer.
  • the microreflectors thus implement a security element that is concise.
  • the invention is therefore based on the object of further developing a security feature with microreflectors of the type mentioned at the outset in such a way that the recognizable effect is particularly striking.
  • a flat security element is provided for the production of documents of value, such as banknotes, checks or the like.
  • the security element has micro-reflectors and, due to its flat design, defines a main level.
  • the microreflectors are arranged in a microreflector pattern and present a number of motifs whose appearance depends on the tilting state or a tilting movement of the security element about an axis lying in the main plane.
  • a first motif appears at a first point when the security element is tilted about the axis in such a way that it lies in a first tilt angle range. If the security element is tilted out of the first tilting angle range, the first motif disappears.
  • a second motif appears, which differs from the first motif and shows a (non-stereographic) motif movement effect during the tilting, running in or parallel to the main plane.
  • the subject motion effect runs at least partially across the first location and/or towards or away from the first location.
  • the second motif thus moves outside of the first point for at least part of the second tilt angle range.
  • the viewer can be given the illusion that the second motif virtually wipes away the first motif.
  • This illusion is supported by the fact that the second motif is in a second Tilt angle range can be seen, which is adjacent to the first tilt angle range or at least partially overlaps with it.
  • the second motif appears as soon as you enter the second tilt angle range. As it continues to tilt, this second subject performs the subject movement effect. Depending on the embodiment, the first motif disappears before the second motif appears or during the motif movement effect.
  • the motif movement effect particularly advantageously includes a change in shape of the second motif, with the shape of the second motif changing in particular continuously or in steps, preferably in three or more steps.
  • the subject motion effect of the second subject is at least partially orthoparalactic.
  • a third motif is also available as an option. It can only be seen in a third range of tilt angles and appears in a different place. Accordingly, it is referred to here as the second digit.
  • the first and the third motif differ optionally.
  • the second digit is offset laterally to the first digit, ie it differs from the first digit.
  • the term “lateral” includes a horizontal, vertical or oblique offset.
  • the tilt angle ranges in which the first and the third motif appear are advantageously disjoint.
  • the first motif is only perceptible in the first tilt angle range and the third motif only in the third tilt angle range.
  • the respective motif is not completely perceptible (over all tilt angle ranges): only in the first or in the third tilt angle range is the first or third motif recognizable in its entirety, outside of this only in parts or not. A flip effect thus appears in this embodiment, since the first motif disappears when tilted and then the third motif appears.
  • the second tilting angle range forms the section between the first and third tilting angle ranges or includes this, so it is larger. In the section between the first and third tilt angle range, neither the first motif nor the third motif can be perceived. In the second tilt angle range, the microreflector pattern presents the second motif, which differs from the other two. During a tilting movement that traverses the second tilting angle range and leads from an end of the first tilting angle range to an end of the third tilting angle range, the second motif exhibits the motif movement effect that runs in or parallel to the main plane. It preferably runs at least partially in an area that lies between the first and second places.
  • the microreflectors are designed and arranged in the microreflector pattern in such a way that a viewer sees the first motif when he/she tilts the planar security element about the axis into the first tilting angle range. If it then tilts through the second tilt angle range, the first motif disappears. Before or after that, the second motif appears, showing the motif movement effect that runs in the main plane. The third motif then optionally appears at a laterally offset point. A wiping effect and optionally also a flip effect are thus generated, on which the motif movement effect of the second motif is superimposed or interposed during the tilting.
  • Tilting or changing the viewing direction with a fixed security element is equivalent to tilting the security element with a fixed viewing direction.
  • tilt angle range covers both scenarios, ie it refers both to a tilting of the supervisory direction with a fixed security element and to a tilting of the security element with a fixed viewing direction.
  • the security element combines an appearance and disappearance effect of the first and optionally third motif with a motif motion effect of the second motif.
  • This movement effect which can be a running or pumping effect, for example, supports (visually) the change of the first and optionally third motif when tilting in the display. In particular, the viewer can be given the illusion that the subject movement effect of the second subject is effectively wiping away the first subject. The same applies to the optional third motif.
  • the second tilting angle range is advantageously in an angular range of ⁇ 5°, preferably ⁇ 10°, particularly preferably ⁇ 20° to the perpendicular to the main plane.
  • the subject movement effect of the second subject occurs in this area.
  • the subject movement effect of the second subject can also occur while the first and optionally third subject is visible in the first and optionally third tilt angle range.
  • the first tilt angle range it is possible for the first tilt angle range to cover a range from 5° to 20° (relative to the perpendicular to the main plane).
  • the first motif is visible there.
  • a second tilt angle range of -20° to +20° is assigned to the second motif
  • a third tilt angle range of -20° to -5° is assigned to the optional third motif.
  • a better optical separation of these motifs can be achieved by a disjunctive arrangement of the first and third motif.
  • the motif movement effect of the second motif is optionally visible over the entire tilt angle range in which the first and optionally the third motif are recognizable.
  • the second tilt angle range therefore does not necessarily lie outside the first and optionally third tilt angle range.
  • the motif movement effect is thus not exclusively interposed between the visibility of the first motif and that of the optional third motif.
  • the first location and the second location are laterally offset from each other. This can be designed in such a way that the first and third motifs are offset horizontally, vertically or diagonally (e.g. diagonally).
  • the disjoint formation of the first and third tilt angle ranges, together with the offset of the two motifs, ensures that a particularly strong illusion of a wiping movement is created.
  • the offset provides a particularly large area for microreflectors for the flip effect.
  • a particularly high-contrast first or third motif can be produced in this way.
  • the security feature is designed in such a way that different motifs are combined.
  • the security element optionally has at least a first, second and possibly third microreflector sub-pattern, which differ from one another in their structure of the microreflectors with regard to the motifs produced and are at least partially nested in one another and each produce the presentation of one of the motifs.
  • the microreflectors are preferably arranged in sub-patterns, each sub-pattern exactly one of the motives causes. It is therefore possible for the three motifs to arrange three micro-reflector sub-patterns at least partially nested in one another, so that micro-reflectors of one sub-pattern are adjacent to or surrounded by micro-reflectors of the other sub-pattern. Chessboard-like nesting, line-like nesting or any microreflector pattern screwed into one another are equally possible.
  • the microreflector sub-patterns can even be completely identical and only offset from one another, as will be shown in the exemplary embodiments, i.e. they can have the same basic structure with regard to the distribution of pixels when viewed from above.
  • the microreflectors of the two microreflector sub-patterns are configured differently in terms of geometry.
  • microreflector subpatterns it is particularly preferred to nest three microreflector subpatterns in one another, so that microreflectors of all subpatterns lie in individual surface areas.
  • a particularly simple generation of the microreflector subpatterns is possible in that the associated microreflector subpatterns are first calculated for the first and the third motif. Up to this point, it corresponds to a conventional alternation between two motifs, such as that found in the publication WO 2014/060089 A2 or from the pending German patent application DE 102017004586.0 is known. It is possible to interleave these two microreflector subpatterns or to arrange them side by side. In a next step, an interlacing with the microreflector sub-pattern is then provided, which generates the second motif with the motif movement effect.
  • the second microreflector partial pattern preferably has a share of 30-70%, preferably between 40 and 60%, particularly preferably 50% of the sum of the three microreflector partial patterns.
  • the micro-reflector pattern includes a plurality of micro-reflectors.
  • This can, as in the prior art, for example WO 2011/066990 A2 , is known to be formed in the form of pixels.
  • a pixel is a small surface area in which at least one, preferably several, microreflectors are located, which have a uniform geometry and represent a pixel of the presented object.
  • Their reflection properties, such as geometry and/or coating, are designed in such a way that they produce a pixel of the object presented. Since the microreflectors or micromirrors work in reflection, it is not absolutely necessary to arrange them next to one another in the manner of a conventional printed image according to the pixels to be displayed.
  • the microreflectors present an image by reflecting incident illumination radiation and can therefore also lie on a substrate for a specific viewing distance range in a spatial arrangement that is independent of the spatial position of the image points to be generated of the presented object.
  • the term "representation of an image” is deliberately not used, but rather the term “presentation”. This is intended to express the projection properties that the microreflectors use when generating the image.
  • the microreflectors can have dimensions between 2 ⁇ m and 300 ⁇ m, preferably between 3 ⁇ m and 100 ⁇ m and particularly preferably between 6 ⁇ m and 20 ⁇ m.
  • microreflector background pattern in the microreflector pattern, the microreflectors of which are preferably inclined relative to the main plane so that they appear dark within the tilted positions in which the flip or subject movement effects are presented, and thus form an object background.
  • the microreflectors can be provided with a reflective or at least reflection-increasing coating.
  • a metallic or high-index coating can be provided.
  • a color-shifting coating can be formed on the microreflectors.
  • the color-shifting coating can be designed in particular as a thin-layer system or thin-film interference coating.
  • a document of value for example a banknote, an identification document, a check, an electronically readable card, etc.
  • a security element of the type mentioned.
  • a flat substrate which defines a main plane due to this shape, is provided with microreflectors that have the properties that were explained above with reference to the security element.
  • the step of coating the microreflectors can also be provided.
  • the microreflectors can be provided with a reflective or at least reflection-increasing coating.
  • Known microstructuring processes can be used to produce the height-modulated surface of the substrate.
  • suitable structures in resist materials can also be exposed, possibly refined, shaped and used for the production of embossing tools using processes known from semiconductor production (photolithography, electron beam lithography, laser beam lithography, etc.).
  • Known processes for embossing thermoplastic films or films coated with radiation-curing lacquers can be used.
  • the substrate can have a number of layers which are applied successively and optionally structured and/or can be composed of a number of parts.
  • FIG. 1 shows a bank note B with a security element S.
  • the bank note B is printed on bank note paper and the security element S is designed as a foil element which was applied to the bank note paper. Due to the flat design of the security element S and the bank note B, the security element S defines a main level H, which 1 coincides with the drawing plane.
  • the security element S has a large number of microreflectors, which present motifs 7, 8, 9 to the viewer in a top view, depending on the viewing direction or tilting of the security element S.
  • FIG. 1 shows a schematic plan view of the security element S.
  • the motifs 7, 8, 9 are drawn in dashed lines since their appearance depends on viewing in a tilting angle range.
  • the motifs 7, 8, 9 never all appear at the same time, but during the tilting, as shown below using the Figures 4A to 7B is explained.
  • the motif 7 is, for example, a star that appears at a point 10.
  • motif 8 is a ring that appears at a location 11 that is laterally offset from location 10 .
  • the point designates the surface area covered by the respective motif in plan view.
  • the motif 9 is, for example, an elongate strip which, during tilting, moves in a direction of a double arrow indicated in 3 is also registered.
  • the viewer can set which of the motifs 7, 8, 9 is presented or which state of the movement effect is present for the motif 9 by tilting the security element S about an axis A1, which is arranged in the main plane H.
  • Figure 3B shows a modification in which the motif 8 is omitted. Otherwise, the security element S corresponds to that of Figure 3A .
  • FIG. 1 shows three micro-reflector patterns 1, 2, 3 used in the embodiment of FIG 2 are nested in a chessboard pattern, so that microreflector pixels 4 of the first microreflector pattern 1 alternate horizontally and horizontally with microreflector pixels 5 of the second microreflector pattern 2 and microreflector pixels 6 of the third microreflector pattern 3 .
  • a fourth microreflector pattern which is preferably also arranged interleaved (and is not shown), is provided. Its micro-reflector pixels are, as will be explained below, intended to generate a background and are arranged in such a way that they are dark in a viewing angle range in which one, two or three of the micro-reflector patterns 1-3 show a motif.
  • the third microreflector pattern 3 is omitted. Only the first microreflector pattern 1 and the second microreflector pattern 2 and optionally the microreflector pattern for the background are then provided.
  • FIGs 4A and 4B show a tilting of the security element S with the lower edge of Figure 3A up and the top edge down.
  • a tilting angle range W1 which is still to be explained, is thereby achieved.
  • this tilt angle range W1 is in the embodiment Figure 4A only the motif 7 recognizable.
  • Motif 9 can also be seen. During the tilting, which caused the motif 8 to disappear at point 11, it made a movement from point 10 to point 11. This creates the illusion that motif 9 wipes away motif 8 from position 11.
  • the motif 9 can be seen when the security element is in a tilt angle range W2 that does not include the first tilt angle range W1 ( Figure 4A ) or includes in whole or in part ( Figure 4B ).
  • the Figures 5A and 5B show a tilting of the same amount in the opposite direction into a third tilting angle range W3. She leads in Figure 5A to the fact that only the motif 8 appears. In the embodiment of Figure 5B the motif 9 also appears in the third tilt angle range W3. It has moved to and beyond location 10 during tilting, giving the illusion of subject 7 being wiped away.
  • the embodiments of Figures 5A and 5B differ in turn as to whether the second tilt angle range W2, in which the motif 9 shows the motif movement effect, includes the tilt angle range W3 for the motif 8 ( Figure 5B ) or not ( Figure 5A ).
  • FIG. 7 and 7B show the position of the tilt angle ranges W1, W2, W3 for the motifs 7, 9, 8.
  • the tilt angle ranges W1, W2, W3 are in each case areas of a tilted position about the axis A1 and define the viewing angle ranges in which the respective motif is presented.
  • the representation of Figure 7A corresponds to a realization of a combination of Figure 4A and 5A
  • the representation according to Figure 7B corresponds to a realization that has the properties according to Figure 4B and 5B combined.
  • the range of tilting angles W1 applies to the motif 7, which then appears with a corresponding tilting about the axis A1. It is defined by a minimum tilt angle b1-min and a maximum tilt angle b1-max. These two angles are of course measured to an axis perpendicular to axis A1. If a tilting movement about the axis A1 takes place within the tilting angle range W1, the first motif 7, which is produced by the first microreflector or micromirror pattern 1, appears. The same applies to the same tilting direction around axis A1 if the tilting angle is within the corresponding angles (180°-b3-min) and (180°-b3-max), which define the second tilt angle range W3.
  • the two tilt angle ranges W1 and W3 are disjoint, with the result that motif 7 and motif 8 never appear at the same time.
  • the already mentioned flip effect occurs.
  • the tilt angle range W2 Between the tilt angle range W1 and the tilt angle range W3 is the tilt angle range W2, in which the subject movement effect of the subject 9 occurs and this subject 9 is visible.
  • the tilt angle range W2 connects directly to the tilt angle ranges W1 and W3.
  • the tilt angle range W2 overlaps both the tilt angle range W1 and the tilt angle range W3.
  • the overlap can be full or partial.
  • An overlap with only one of the tilt angle ranges W1 or W3 is also possible. This would correspond to a combination, for example Figure 4A and Figure 5B .
  • motifs 7, 8 and 9 and the motif movement effect of the motif 9 are achieved in that the micro-reflectors 4, 5 and 6 in the associated micro-reflector patterns 1, 2 and 3 are individually inclined accordingly.
  • a corresponding one is first made separately for the three motifs 7, 8, 9 and the movement effect of the motif 9 Reflector design calculated.
  • the corresponding individual pixels are then shifted into the corresponding mirror pitch range, so that the tilt angle ranges W1, W2 and W3 are specified.
  • the pixels are then interlaced with each other, for example in a chessboard pattern, as shown in 2 is shown.
  • the pixel size is typically 10 to 20 ⁇ m.
  • the calculation of the reflector designs for motifs 7 and 8 is carried out first; ie the microreflector patterns 1 and 3 are calculated. These can be nested in one another or lie side by side. Then this combination of micro-reflector patterns 1 and 3 is interleaved with a micro-reflector pattern 2 which creates the subject 9 and its subject motion effect.
  • This procedure is particularly applicable to the embodiments according to FIG Figure 4B , 5B , 7B useful because there the subject movement effect of subject 9 extends beyond locations 10 and 11 where subjects 7 and 8 appear.
  • the nesting of the microreflector pattern 1, 3 allows the wiping effect to also run over these points 10 and 11, so that it appears particularly concise.
  • the area ratio of the nesting of pixels of microreflector structures 1 and 3 to the pixels of microreflector structure 2 is in the ratio of 30:70 to 70:30, preferably in the range of 40:60 to 60:40, particularly preferably 50:50 .
  • All reflector elements that are not used in the reflector designs are optionally equipped with a very steep incline towards the main plane H, so that they appear dark in the respective tilting angle areas. A variation of the steep gradients in terms of noise is useful here. This creates the fourth microreflector pattern for the background. It contains appropriate microreflectors.
  • first positions 10 and second positions 11 as well as associated motifs 7 and 8 are lined up perpendicularly to a connecting straight line A2 between positions 10 and 11, which is parallel to the tilting axis A1.
  • the positions 10 and 11 are alternately interchanged with the associated motifs.
  • 8 four rows, each comprising a pair of position 10 and position 11 or motif 7 and motif 8, with the arrangement of positions 10 and 11 in rows two and four being mirrored in relation to rows one and three.
  • all motifs 7 appear first, which are then arranged in a zigzag pattern.
  • the wiping effect is intensified when the motif movement effect guides the motif 9 at least partially over the point at which the motif 7, 8 disappears when it is tilted.
  • motifs 7 and 8 can here in particular as in the publication WO 2016/1802522 A1 be realized as described.
  • motifs 7 and 8 which are alternately visible from top to bottom, are shifted upwards in perspective relative to the main plane H or are floating above the main plane H (cross-hatching for motif 8 or diagonal hatching for motif 7 from bottom left to top right) or lowered downwards relative to the main plane H or floating below the main plane H (vertical hatching for motif 8 or diagonal hatching for motif 7 from top left to bottom right).
  • Motifs 7 and 8 thus not only change through a flip effect, they also change their position in relation to the main plane at the same time.
  • a motif that previously appeared in perspective below the main plane H changes in the flip effect with another motif elsewhere, which appears elevated in relation to the main plane H.
  • These properties i.e. the arrangement of motifs that change in opposite directions and the lowering or raising compared to the main level, are of course advantageously linked to a particularly striking effect, but could also be used individually.
  • microreflectors of the motif 7 and/or the motif 8 as in the publication WO 2014/060089 A2 be realised.
  • the flip effect does not have to be a change of different motifs. Rather, it is also a simple change of location one and the same motif, for example a star or ring, between positions 10 and 11 is possible.
  • All embodiments of the security element can be implemented as foil elements, as foil elements on window openings or as a security thread. They can be attached to paper or polymer banknotes, both on the front and on the back. The same applies to security documents, identity papers, etc.

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EP19726574.7A 2018-05-18 2019-05-16 Sicherheitselement mit mikroreflektoren Active EP3793839B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102018004062.4A DE102018004062A1 (de) 2018-05-18 2018-05-18 Sicherheitselement mit Mikroreflektoren
PCT/EP2019/000149 WO2019219239A1 (de) 2018-05-18 2019-05-16 Sicherheitselement mit mikroreflektoren

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EP3793839A1 EP3793839A1 (de) 2021-03-24
EP3793839B1 true EP3793839B1 (de) 2022-12-07

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CN (1) CN111819085B (zh)
DE (1) DE102018004062A1 (zh)
WO (1) WO2019219239A1 (zh)

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Publication number Priority date Publication date Assignee Title
DE102019008250A1 (de) * 2019-11-27 2021-05-27 Giesecke+Devrient Currency Technology Gmbh Sicherheitselement mit kippungsabhängiger Motivdarstellung
DE102020000027A1 (de) 2020-01-03 2021-07-08 Giesecke+Devrient Currency Technology Gmbh Optisch variables Sicherheitselement
DE102020000030A1 (de) * 2020-01-03 2021-07-08 Giesecke+Devrient Currency Technology Gmbh Optisch variables Sicherheitselement
DE102020004423A1 (de) 2020-07-22 2022-01-27 Giesecke+Devrient Currency Technology Gmbh Sicherheitsmerkmal mit kippungsabhängiger Motivdarstellung

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WO2007107235A1 (de) 2006-03-17 2007-09-27 Giesecke & Devrient Gmbh Gitterbild
EP2522529A2 (de) 2011-05-10 2012-11-14 Giesecke & Devrient GmbH Sicherheitselement und mit demselben ausgestatteter Datenträger
WO2014121908A1 (de) 2013-02-07 2014-08-14 Giesecke & Devrient Gmbh Optisch variables flächenmuster
WO2016034274A1 (de) 2014-09-03 2016-03-10 Giesecke & Devrient Gmbh Optisch variables sicherheitselement

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EP3793839A1 (de) 2021-03-24
WO2019219239A1 (de) 2019-11-21
DE102018004062A1 (de) 2019-11-21
CN111819085B (zh) 2022-04-26

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