EP3793839A1

EP3793839A1 - Security element with microreflectors

Info

Publication number: EP3793839A1
Application number: EP19726574.7A
Authority: EP
Inventors: Kai Hermann SCHERER; Maik Rudolf Johann SCHERER; Raphael DEHMEL
Original assignee: Giesecke and Devrient Currency Technology GmbH
Current assignee: Giesecke and Devrient Currency Technology GmbH
Priority date: 2018-05-18
Filing date: 2019-05-16
Publication date: 2021-03-24
Anticipated expiration: 2039-05-16
Also published as: CN111819085A; DE102018004062A1; EP3793839B1; WO2019219239A1; CN111819085B

Abstract

The invention relates to a flat security element with microreflectors for creating value documents, such as bank notes (B), cheques or the like, wherein the flat security element (S) defines a main plane (H) and the microreflectors (4, 5, 6) are arranged in a microreflector pattern (1, 2, 3) and in a bird's eye view of the flat security element present a first and a third motif (7, 8) when tilted about an axis (Al), wherein the first motif (7) can only be perceived in a first tilt angle range (W1) and the third motif (8) can only be perceived in a third tilt angle range (W3), wherein the first motif (7) appears at a first position (10) which is laterally offset in relation to a second position (11) at which the third motif (8) appears, the tilt angle ranges (W1, W3) are disjoint, so that therebetween at least a part of a second tilt angle range (W2) lies in which neither the first motif (7) nor the third motif (8) can be perceived, and the microreflector pattern (1, 2, 3) presents, in the second tilt angle range (W2), a second motif (9) which, during a tilt movement which goes through the second tilt angle range (W2), shows a motif movement effect which runs in the main plane (H) or parallel thereto.

Description

Security element with micro-reflectors

The invention relates to a planar security element with microreflectors for producing documents of value, such as banknotes, checks or the like, wherein the planar security element defines a main plane and the microreflectors are arranged in a microreflector pattern and in plan view of the planar security element when tilting about an axis. present a first and a second motif, wherein the first motif is 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 document

WO 2014/060089 A2. The first and the second motif are different here, so that the tilting of the security element changes the view from the first motif to the second motif or from a domed first view to a curved second view. The micro-reflectors are net angeord in a micro-reflector pattern, so that the planar security element in a plurality of pixels, each comprising at least one optically active facet, so at least one micro-reflector is divided. In order to achieve that only one of the motifs is visible in a certain first viewing angle range and only the other motif is visible in a certain second viewing angle range, the microreflector patterns of the two motifs are interleaved with simultaneous rescoring of the microreflector or micromirror alignments , In this way, a safety element can be produced which gives the impression that a static, three-dimensional motif changes abruptly. However, the proposed embodiments may also be such that both representations are visible at the same time in a certain tilt angle range. The flächi ge form of the security element defines a major level. The underlying effect according to which a three-dimensional appearing motif is presented which can be perceived by a viewer as a surface projecting and / or receding relative to its actual spatial form and, in particular, as a continuously curved surface is known, for example, from WO 2011/066990 A2 ,

Furthermore, effects are known in which one or more motifs when tilting the security element in a broader sense show a dynamic behavior, while retaining their shape essentially unchanged.

The directions of tilting movement and "movement" are equal or opposite (parallax), so that the two eyes of a viewer see the motifs at the same time in slightly different positions, which creates a spatial impression or a hovering effect Art can be generated, for example, with a safety element, as described in the publication WO 2016/180522 Al be written.

Combinations of two or more spatially or three-dimensionally appearing motifs which behave in a first described manner when tilting the security element, are also known in principle, for example from the pending German patent application

DE 102017004586.0. Even with such security elements, it can be provided that at least one of the motifs is only visible in a certain first viewing angle range and at least one other motif is visible only in a second viewing angle range, so that the impression of an abrupt change of motivation arises when the viewing direction is changed , Floating motifs are also known from document WO 2012/048847 A1. Therein is described a display element which is designed and determined such that when illuminated, a light spot image is generated from a plurality of light spots which appear to be floating above or below the area area for an observer and which are arranged in the form of a predetermined motif. Each light spot of the light spot image is assigned at least one reflective optical element which, when illuminated, contributes to the generation of its associated light spot. In one embodiment, the motif can also be an alternating image that shows different images from different viewing directions.

In the prior art, it is further known to present by microreflectors in plan motifs that show non-stereographic Motivbewe tion effects. As an example, see the pamphlets

WO 2011/066991 A2 and WO 2015/078572 Al referenced. The Mikroreflek gates are in particular designed so that their orientation along a direction changes continuously or gradually, so that a Be trachter sees when tilting the security element a bright light reflection that travels along the direction of change. The motif thus has a movement effect when tilting the security element, which is related to the main plane.

Microreflector-based security features that show a tilt-angle-dependent change are difficult to replicate because traditional printing techniques tend to fail to make the change. At the same time, the change is recognizable to the normal viewer. The microreflectors thus realize a security element that is concise. The invention is therefore the object of developing a security feature with micro-reflectors of the type mentioned so that the apparent effect is particularly concise.

The invention is defined in the independent claims. The dependent claims relate to advantageous developments.

For the production of value documents, such as banknotes, checks or the like, a planar security element is provided. The safety element has micro-deflectors and defines a main plane due to its planar design. The microreflectors are arranged in a microreflector pattern and present several motifs whose appearance depends on the tilting state or on a tilting movement of the security element about an axis lying in the main plane. At a first location, a first motif appears when the security element is tilted about the axis to lie within a first tilt angle range. If you tilt the security element out of the first tilt angle range, the first motif disappears. At the same time, during the tilting process, a second subject appears, different from the first subject, showing a (non-stereographic) motivational movement effect in the main plane or parallel to it during tilting. The motivational motion effect extends at least partially past the first location and / or toward the first location or away therefrom. The second motif thus moves at least for a part of the second tilt angle range outside the first position. As a result, the observer can be witness to the illusion that the second motif virtually wipes away the first motif. This illusion is supported by the second motif in a second Tilting angle range is seen, which adjoins the first tilt angle range or overlaps at least partially with this. If one tilts the safety element in the first tilt angle range in the direction of the second tilt angle range, the second motif appears as soon as one enters the second tilt angle range. As you continue tapping, this second subject performs the creative movement effect. Depending on the version, the first subject disappears before the second subject appears or during the motivational movement effect.

The motif movement effect includes with particular advantage a change in shape of the second motif, wherein the shape of the second motif in particular continuously or stepwise, preferably in three or more steps changes. Alternatively or additionally, the motif movement effect of the second motif is at least partially orthoparallaktisch.

Optionally, a third motif is provided. It can only be seen in a third tilt angle range and appears at a different position. It is referred to here as second place. The first and third motifs are optional. The second location is laterally offset to the first location, so differs from the first location. Depending on the orientation of the security element, the term "lateral" encompasses a horizontal, vertical or oblique offset.The tilt angle ranges in which the first and third motifs appear are advantageously disjoint.The first motif is only for the first tilt angle range and This is understood to mean that the respective motif is not completely perceptible (over all tilt angles): only in the first or in the third tilt angle range can the first or third motif be seen in its entirety, outside of it only in parts or not. Thus, in this embodiment, a flip effect appears, since when tilting the first motif disappears and then the third motif appears.

The second tilt angle range forms or comprises the section between the first and third tilt angle ranges, that is, is larger. In the section between the first and third tilt angles, neither the first subject nor the third subject is perceptible. The microreflector pattern presents, in the second tilt angle range, the second motif, which is different from the other two. During a tilting movement that passes through the second tilting angle range and leads from one end of the first tilting angle range to an end of the third tilting angle range, the second motive shows the motive movement effect that is in the main plane or parallel to it. It preferably runs at least partially in an area lying between the first and second location.

The micro-reflectors are formed and arranged in the micro-reflector pattern so that a viewer sees the first motif when it tilts the planar security element about the axis in the first tilt angle range. If it then tilts through the second tilt angle range, the first motif disappears. Before or after, the second subject appears, showing the motivational movement that runs in the main plane. Subsequently, the third motif optionally appears at a laterally offset point. Thus, a wiping effect and optionally also a flip effect, which is superimposed or interposed during tilting, the motive movement effect of the second motif, is generated. Tilting or changing the direction of supervision with a fixed safety element is equivalent to tilting the security element in the fixed viewing direction. The term "tilt angle range" covers both case designs in this respect, ie, refers both to a tilting of the direction of view with a fixed security element as well as to a tilting of the security element in the fixed viewing direction.

The security element combines an appearance and disappearance effect of the first and optionally third motive with a motive movement effect of the second motive. This movement effect, which can be, for example, a running or pumping effect, supports (visually) the change of the first and optionally third motif when tilting in the representation. In particular, it is possible for the observer to create the illusion that the motif movement effect of the second motif virtually wipes off the first motif. The same applies to the optional third theme.

The second tilt angle range is advantageously in an angular range of ± 5 °, preferably ± 10 °, more preferably ± 20 ° to the perpendicular to the main plane. In this area, the subject movement effect of the second subject occurs. The subject movement effect of the second subject may also occur while the first and optionally third subject is visible in the first and optionally third tilt angle ranges. In particular, it is possible that the first tilt angle range includes a range of 5 ° to 20 ° (relative to the lowering rights on the main plane). There the first motif is visible. The second motif is a second tilt angle range from -20 ° to + 20 ° zugeord net, the optional third motif a third tilt angle range from -20 ° to -5 °. A disjoint arrangement of the first and third motifs allows a better optical separation of these motifs. The motivational movement effect of the second motif is optionally visible over the entire tilt angle range, in which the first and optionally the third motif can be seen. The second tilt angle range is therefore not necessarily outside the first and optionally third tilt angle range. In preferred embodiments, 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 may be designed so that first and third motifs are locally offset from each other horizontally, vertically or obliquely (e.g., diagonally).

The disjoint formation of the first and third tilt angle ranges, together with the offset of the two motives, ensures that a particularly strong illusion of a wiping motion is generated. The offset provides a particularly large area for microreflectors for the flip effect. In this way, surprisingly, a particularly high-contrast first or third motif can be generated.

The security feature is designed so that different motifs are combined. The security element optionally has at least one first, second and possibly third microreflector subpattern, which differ in their structure of the microreflectors with respect to the generated motifs and are at least partially interleaved and respectively 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. Accordingly, it is possible for the three motifs to arrange three microreflector partial patterns at least partially interlaced, so that microreflectors of the one partial pattern are adjacent to or surrounded by microreflectors of the other partial patterns. Checkerboard nesting, line-like nesting, or any microreflector pattern screwed into each other are equally possible.

The differences in particular of the first and third microreflector partial pattern relate to the formation of the individual pixels and their arrangement, which leads to the presentation of the respective motif. This difference does not necessarily require a different geometric division or distribution of the pixels within a microreflector subpattern. In their structural layout, as shown in embodiments, the microreflector subpatterns may even be completely identical and offset only from one another, i.e. from one another. have the same basic structure in view of the distribution of pixels in plan view. Of course, the Mikroreflek gates of the two microreflector sub-pattern geometrically designed differently.

It is particularly preferred to nest three microreflector partial patterns in one another so that microreflectors of all partial patterns lie in individual surface areas. A particularly simple generation of the microreflector sector subpatterns is possible by first calculating the associated microreflector subpatterns for the first and third motifs. Up to this point, it corresponds to a conventional change between two Moti ven, as it is known for example from the document WO 2014/060089 A2 or from the pending German patent application DE 102017004586.0. It is possible to nest these two microreflector subpatterns or to arrange them next to each other. In a next step, an interleaving with the microreflector partial pattern is then provided, which generates the second motif with the motif movement effect. Thus, first a structure is calculated which contains the first and third microreflector partial patterns and which is then nested with the second microreflector partial pattern. In this case, the second microreflector partial pattern preferably has a fraction 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. These can, as in the prior art, for example, the

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 a plurality of microreflectors lie, which have a uniform geometry and represent a pixel of the presented object. Their reflection properties, for example geometry and / or coating, are designed such that they produce a pixel of the presented object. Because the

If microreflectors or micromirrors work in reflection, it is not absolutely necessary to arrange them side by side in the manner of a standard printed image in accordance with the pixels to be represented. Rather, the microreflectors present an image by reflection of incident illumination radiation and, therefore, for a given viewing distance range, they can also lie in a spatial arrangement on a substrate, which is detached from the spatial position of the pixels of the object presented. In this description, therefore, it is quite deliberately not talked about "presentation of an image", but about the presentation. chen. This is intended to express the projection properties that the micro-reflectors use in imaging.

The microreflectors may have dimensions between 2 mih and 300 gm, preferably between 3 gm and 100 gm and more preferably between 6 gm and 20 gm.

The different flip or motive motion effects are particularly noticeable when the subject is placed in front of a background that appears dark. It is therefore preferable to provide in the micro-reflector pattern a microreflector background pattern whose microreflectors are preferably inclined to the principal plane so as to appear dark within the tilting plies in which the flip motive effects are presented, thus forming an object background.

The microreflectors can be provided with a reflective or at least reflection-enhancing coating. In particular, a metallic or high-refractive coating may be provided.

In a further refinement, a color-tilting 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.

In one embodiment, a value document, for example a banknote, an identity document, a check, an electronically readable card, etc., is configured as a value document with a security element of the type mentioned. To produce the security element, a planar substrate, which defines a main plane on account of this shape, is provided with microreflectors which have the properties which were explained above with reference to the security element.

In the production method according to the invention, the step of coating the microreflectors may also be provided. The microreflectors can be provided with a reflective or at least reflection-enhancing coating.

For the generation of the height-modulated surface of the substrate, known microstructuring methods may be used, e.g. Embossing process. For example, suitable structures in resist materials can also be exposed, possibly refined, shaped and used for the production of embossing tools with methods known from semiconductor production (photolithography, electron beam lithography, laser beam lithography, etc.). Known processes for embossing in thermoplastic films or in films coated with radiation-curing paints can be used. The substrate can have a plurality of layers, which are applied successively and optionally structured and / or can be composed of several parts.

The invention will be explained in more detail by means of exemplary embodiments with reference to the attached drawings, which likewise disclose inventive features. These exemplary embodiments are for illustrative purposes only and are not to be construed as limiting. For example, a description of an embodiment with a plurality of elements or components is not to interpret that all these elements or components are necessary for implementation. Rather, other embodiments may also include alternative elements and components, fewer elements or components, or additional elements or components. Elements or components of various embodiments may be combined with each other unless otherwise specified. Modifications and modifications described for one of the embodiments may also be applicable to other embodiments. To avoid repetition, identical or corresponding elements in different figures are denoted by the same reference numerals and are not explained several times. In the figures show:

1 is a plan view of a banknote with a security element, Fig. 2 is a schematic representation of the structure of the Sicherheitsselemen TES of FIG. 1,

3A and 3B are schematic representations of motifs which the

Security element of FIG. 2 in various embodiments presented to a viewer in plan view and the tilting of the

Security element appear differently,

4 to 6 show the appearance of different embodiments of the security element in different tilt angle ranges,

7A and 7B representations of embodiments of the security element for clarification of tilt angle ranges and 8 shows a further embodiment of the security element with the properties according to FIGS. 3A to 7B.

1 schematically shows a banknote B with a security element S. The banknote B is printed on a banknote paper, and the security element S is configured as a film element which has been applied to the banknote paper. Due to the planar configuration of the security element S and the banknote B, the security element S defines a level of the catchment H, which coincides in FIG. 1 with the plane of the drawing.

The security element S has a multiplicity of microreflectors, which present the viewer in plan view motifs 7, 8, 9, depending on the viewing direction or tilting of the security element S. FIG. 3A shows schematically a top view of the security element S. In this case, FIGS Motifs 7, 8, 9 drawn by dashed lines, since their appearance depends on the consideration in a tipping angle range. The motifs 7, 8, 9 never appear all at the same time, but during the tilting, as will be explained below with reference to FIGS. 4A to 7B. The motif 7 is, for example, a star that appears at a location 10. The motif 8 in the exemplary embodiment is a ring which appears at a point 10 offset laterally to the point 10. The point indicates the surface area covered by the respective motif in plan view. The example 9 is, for example, an elongated strip which moves during tilting in a direction of a double arrow, which is also entered in FIG. Which of the motives 7, 8, 9 is presented or which state of the motion effect for the motif 9 is present, the observer can adjust by tilting the security element S about an axis Al, which is arranged in the main plane H. Fig. 3B shows a modification in which the motif 8 is omitted. Otherwise, the security element S corresponds to that of FIG. 3A.

To produce the motifs 7, 8, 9 and the motif movement effect according to FIG. 3A, the security element S, as FIG. 2 shows, has three microreflector patterns 1, 2, 3 which, in the embodiment of FIG. 2, are nested in one another like a checkerboard pattern, so that horizontally as horizontally microreflector pixels 4 of the first micro-reflector pattern 1 alternate with microreflector pixels 5 of the second microreflector pattern 2 and microreflector pixels 6 of the third microreflector pattern 3. Optionally, a fourth microreflector pattern, which is preferably also arranged in a nested manner (and not shown), is provided. Its micro-reflector pixels, as will be explained, are provided for generating a background and arranged to be dark in a viewing angle range in which one, two or three of the micro-reflector patterns 1-3 have a motif.

In the embodiment of FIG. 3B, the third microreflector pattern 3 is dispensed with. Only the first microreflector pattern 1 and the second microreflector pattern 2 and optionally the background microreflector pattern are then provided.

The appearance of the security element S during tilting is explained below with reference to the embodiment of FIG. 3A, that is to say for a realization which has both the motif 7 and the motif 8. The explanations apply mutatis mutandis to the embodiments of FIG. 3B, ie variants without the subject. 8 FIGS. 4A and 4B show a tilting of the security element S with the lower edge of FIG. 3A upwards and the upper edge downwards. In this case, a tilting angle range W1 which is still to be explained is achieved. In this tilting angle range W1, only the motif 7 can be seen in the embodiment of FIG. 4A. In the embodiment of FIG. 4B, in addition, the motif 9 can also be seen. During the tilting, which caused the motif 8 to disappear at the point 11, it made a movement from the point 10 to the point 11. This creates the illusion that the subject 9 wipes the motif 8 from the point 11. The motif 9 can be recognized when the security element is located in a tilt angle range W2 that does not include the first tilt angle range W1 (FIG. 4A) or completely or partially (FIG. 4B).

FIGS. 5A and 5B show opposing tilting in the same amount in a third tilt angle range W3. It leads in Fig. 5A to the fact that only the subject 8 appears. In the embodiment of FIG. 5B, the motif 9 also appears in the third tilt angle E3 W3. It has moved during the tilting to the point 10 and beyond, so that the illusion of a Wegwischens the subject 7 arises. The embodiments of FIGS. 5A and 5B again differ in whether the second tilt angle range W2, in which the motif 9 shows the motif movement effect, comprises the tilt angle range W3 for the motif 8 (FIG. 5B) or not (FIG. 5A ).

It is common to the embodiments according to FIGS. 4A / 5A and 4B / 5B that the motif 9 appears in at least one state between the tilt angle ranges W1 and W3 and shows the motif movement effect. Of course, the embodiment according to FIG. 4A can also be combined with the embodiment according to FIG. 5B. The same applies to the embodiments according to FIGS. 5A and 4B. When tilting between the two tilt angle ranges W1 and W3, as shown in FIG. 6, the motif 9 appears. It moves with the tilting process in the main plane H, for example away from the point 10 of the first motif 7 and to the point 11 of the third motif 8 out. The flip effect with the change between the motifs 7 and 8 is thus supported by a Motivbewe tion effect of the second motif 9, as described for example in the publications WO 2011/066991 A2 or WO 2015/078572 Al, the disclosure content extent in the present application is incorporated, and shows a kind of wiping movement.

FIGS. 7 and 7B show the position of the tilt angle ranges W1, W2, W3 for the motives 7, 9, 8. The tilt angle ranges W1, W2, W3 are each areas of a tilted position about the axis A1 and define the viewing angle ranges in which respective motif is presented. The representation of FIG. 7A corresponds to a realization of a combination of FIGS. 4A and 5A, the representation according to FIG. 7B corresponds to a realization which combines the properties according to FIGS. 4B and 5B.

The tilt angle range Wl applies to the motif 7, which then shows itself with the appropriate tilt about the axis Al. It is defined by a minimum tilt angle bl -min and a maximum tilt angle bl-max. These two angles are of course measured to an axis that is perpendicular to the axis Al. If a tilting movement about the axis A1 takes place within the tilt angle range W1, the first motif 7 produced by the first microreflector or micromirror pattern 1 is shown. The same applies to the same tilt direction about the axis Al, when at the same time the tilt angle is within the corresponding angle (180 ° -b3-min) and (180 ° -b3-max), which define the second tilt angle range W3. As you can see, the two tilt angle ranges W1 and W3 are disjoint, with the result that the subject 7 and the subject 8 never appear simultaneously. It occurs the already mentioned flip effect. Between the Kippwinkelbereich W1 and the Kippwinkelbereich W3 is the Kippwinkelbereich W2, in which the motive movement effect of the subject 9 occurs and this motif 9 is visible. In the embodiment of FIG. 7A, the tilt angle range W2 directly adjoins the tilt angle ranges W1 and W3. In the embodiment of FIG. 7B, the tilt angle range W2 overlaps with both the tilt angle range W1 and the tilt angle range W3. The overlap can be complete or partial. An overlap with only one of the tilt angle ranges W1 or W3 is also possible. This would correspond to a combination example as shown in FIG. 4A and FIG. 5B. When tilting from bl-min to (180 ° -b3-min), the first motif 7 is thus first static, at the tilt angle bl-max the first motif 7 disappears and only the motive movement effect of the motif 9 is visible. This already sets in accordance with FIG. 7B within the first tilt angle range W1. When further tipping by the Kippwinkelbe rich W2 appears as soon as you reach the tilt angle (180-b3-max) and enters the tilt angle range W3, the second subject 8. The subject 9 and its movement effect last for a while during the Continue to tilt.

The presentation of the motifs 7, 8 and 9 and the motif movement effect of the motif 9 are achieved in that the microreflectors 4, 5 and 6 in the associated microreflector patterns 1, 2 and 3 are individually correspondingly inclined. To determine the appropriate alignments of

In one embodiment, microreflectors first become a separate one separately for the three motifs 7, 8, 9 and the movement effect of the motif 9 Reflector design calculated. For this purpose, reference is made to the prior art. Details of such a calculation can be found, for example, in the publication WO 2014/060089 A2 or in the publication WO 2016/180522 A1, the disclosure content of which is included in the present application in this respect. The corresponding individual pixels are then shifted into the corresponding mirror slope range, so that the tilt angle ranges W1, W2 and W3 are predetermined. Subsequently, the pixels are nested together correspondingly, for example chess board-like, as shown in Fig. 2. The pixel size typically corresponds to 10 to 20 pm.

In a particularly preferred manufacturing process, first the calculation of the reflector designs for the motifs 7 and 8 is carried out; that is, the microreflector patterns 1 and 3 are calculated. These can be arranged nested inside each other or laterally adjacent to each other. Subsequently, this combination of microreflector patterns 1 and 3 is interleaved with a micro-reflector pattern 2, which generates the motif 9 and its motive movement effect. This procedure is expedient in particular for the embodiments according to FIGS. 4B, 5B, 7B, since there the motive movement effect of the motif 9 extends over the points 10 and 11 at which the motives 7 and 8 appear. The interleaving of the microreflector pattern 1, 3 makes it possible to run the wiping effect also via these named points 10 and 11, so that it appears particularly concise.

In this embodiment, the area ratio of the interleaving of pixels of the microreflector structures 1 and 3 to the pixels of the micro-reflector structure 2 in the ratio of 30:70 to 70:30, preferably in the range of 40:60 to 60:40, particularly preferably 50: 50th All reflector elements that are not used in the reflector designs are optionally equipped with a very steep slope against the main plane H, so that they appear dark in the respective tilt angle ranges. Here is a variation of the steep slopes in the sense of noise appropriate. This creates the fourth microreflector pattern for the background. It contains corresponding microreflectors.

Fig. 8 shows a further embodiment, which gives a particularly significant effect. In this case, a plurality of arrangements of first locations 10 and second locations 11 and associated motifs 7 and 8 perpendicular to a connecting straight line A2 between the points 10 and 11, which is parallel to the tilt axis Al, lined up. In this case, however, the points 10 and 11 are alternately reversed with the associated motifs. Thus, in the embodiment of FIG. 8, there are four rows, each comprising a pair of location 10 and location 11 and motif 7 and motif 8, respectively, wherein in rows two and four the locations of locations 10 and 11 relative to rows one and three are mirrored. When tilting about the axis Al, all the motifs 7 appear first, which are then arranged in a zig-zag-like pattern. If one tilts out of the tilt angle range W1, the wiping movement of the motif 9 appears in the direction of the arrow. This swipe moves in rows one and three from right to left, in rows two and four from left to right. It therefore runs away from the disappearing motive 7, 8 and towards the appearing motif 7, 8, which then becomes visible when the tilting has progressed into the tilt angle range W3. In all embodiments, the wiping effect is enhanced if the motive movement effect at least partially guides the motif 9 over the point at which the motif 7, 8 disappears during tilting. The microreflectors of the motifs 7 and 8 can be realized here in particular as described in the publication WO 2016/1802522 A1. In order to strengthen the effect, the motifs 7 and 8, alternately visible from top to bottom, are shifted upwards in perspective or above the main plane H (cross-hatching for the motif 8 or diagonal-hatching for the motif 7 of FIG lower left to upper right) or downwards relative to the main plane H down or below the main plane H floating (vertical hatching for the motif 8 or diagonal hatching for the motif 7 from top left to bottom right). The motifs 7 and 8 thus change not only by a flip effect, they also change their position relative to the main plane. A motif that previously appeared in perspective below the main plane H, changes in flip effect with another motif elsewhere, which appears raised against the main plane H. These properties, ie the arrangement of oppositely changing motifs and the lowering or lifting relative to the main plane are of course linked advantageously to a particularly concise effect but could also be used individually.

Alternatively, the microreflectors of the motif 7 and / or the motif 8 can be realized as in the document WO 2014/060089 A2.

Likewise, the flip effect does not have to be a change of different motives. Rather, it is also a simple change of location one and the same motif, such as a star or ring, between the points 10 and 11 possible.

All embodiments of the security element can be realized as foil elements, as foil elements on window recesses or as security threads. They can be mounted on paper or polymer banknotes on both the front and the back. The same applies to security documents, identity papers etc.

Reference to oak list

1,2,3 micro-reflector pattern

4, 5.6 microreflector pixels

7,8,9 motif

10, 11 place

Wl, W2, W3 tilt angle range

bl -min tilt angle

bl-max tilt angle

b3-min tilt angle

b3-max tilt angle

Al axle

A2 straight

B banknote

H main level

S security element

Claims

Patent claims

1. A flat security element with microreflectors for the production of documents of value such as banknotes, checks or the like, wherein the planar security element defines a main plane and the Mikroreflek gates are arranged in a Mikroreflektorenmuster and in plan view of the planar security element when tilting about an axis a first and a present second motif, wherein the first motif is perceptible only in a first tilt angle range and the second motif in a second tilt angle range, wherein the first motif at a first location he seems,

d a d u r c h e c e n c i n e s that

the second motif during a tilting movement, which leads out of the first tilt angle range in which the first motif is recognizable out and through the second tilt angle range shows a motif movement effect that runs in the main plane or parallel to it, and the second motif to at least for a portion of the second tilt angle range out of the first position.

2. Security element according to claim 1, characterized in that the motif movement effect comprises a change in shape of the second motif, wherein the shape of the second motif in particular continuously or stepwise, preferably in three or more steps, changes, and / or that the motif movement effect at least partially orthoparallaktisch is.

3. Security element according to claim 1 or 2, characterized in that the microreflector pattern in plan view of the planar security element when tilting about the axis also presents a third motif, wherein the third motif is perceptible bar only in a third Kippwinkelbereich, the third motif appears at a second location laterally offset from the first location where the first motif appears.

4. Security element according to claim 3, characterized in that the first and third tilt angle range are disjoint.

5. The security element according to one of the above claims, characterized in that the second tilt angle range overlaps with the first tilt angle range and / or, if present, also with the third tilt angle range, preferably completely.

6. The security element according to claim 1, characterized in that the second tilt angle range is in an angular range of ± 5 °, preferably ± 10 °, more preferably ± 20 ° to the perpendicular to the main plane.

7. Security element according to one of the above claims, characterized in that the motif movement effect pushes the second motif so ver that it moves away from the vanishing motive or on the disappeared motif.

8. Security element according to claim 3 and optionally additionally one or more of claims 4 to 7, characterized in that a connecting line between the first and second position along the axis, preferably in parallel.

9. Security element according to one of the above claims, characterized in that the second motif is moving in the main plane A line structure that is elongated and moves in the motive movement effect along the axis.

10. The security element according to claims 1 to 8, characterized in that the second motif comprises a moving line in the main plane structure, which moves in the motive movement effect at an angle to the axis of less than ± 45 °.

11. The security element according to claim 3 and optionally additionally one or more of claims 4 to 10, characterized in that the motive movement effect of the second motif extends in plan view of the security element in a surface region which lies at least partially between the first location and the second location.

12. The security element according to claim 3 and optionally additionally one or more of claims 4 to 11, characterized in that the first motif appears raised perpendicular to the main plane and the second motif appears lowered relative to the main plane.

13. A security element according to any one of the above claims, characterized in that the micro-reflector pattern has a Mikroreflektorenhinter basic pattern, the micro-deflectors are preferably inclined relative to the main plane that they tilt the security element in the first and second tilt angle range and, if present, in the third Kippwinkelbereich appear dark and thus form an object background.

14. document of value with a security element according to one of Ansprü che 1 to 13.

15. A production method for a planar security element for producing value documents, such as banknotes, checks or the like, wherein a planar, due to this form a main plane defining substrate is provided with microreflectors, which are arranged in a microreflector torenmuster and a first and a present second motif, wherein the first motif is perceptible only in a first tilt angle range and the second motif in a second tilt angle range, wherein the first motif appears at a first location,

d a d u r c h e c e n c i n e s that

the second motif during a tilting movement, which out of the first tilt angle range, in which the first subject is recognizable out and leads through the second tilt angle range shows a motive movement effect, which runs in the main plane or parallel to it, and the second motif at least for moves a part of the second tilt angle range out of the first position.