Depiction arrangement

Patent metadata

Field	Value
Publication number	US-10134109-B2
Application number	US-201414447334-A
Country	US
Kind code	B2
Filing date	Jul 30, 2014
Priority date	Sep 10, 2008
Publication date	Nov 20, 2018
Grant date	Nov 20, 2018

Abstract

The invention relates to a depiction arrangement for security papers, value documents, electronic display devices or other data carriers, having a grid image arrangement for depicting a target image ( 40 ) that is broken down into two or more partial target images ( 42, 44 ), having
a motif image that is subdivided into a plurality of periodically or at least locally periodically arranged cells ( 24 ) in each of which are arranged mapped regions of one or more of the partial target images ( 42, 44 ), a viewing grid ( 22 ), composed of a plurality of viewing grid elements, that, when the motif image is viewed, reconstructs the complete target image ( 40 ) from the mapped regions arranged in the cells ( 24 ), the motif image being, independently of the cell subdivision, split into at least first and second microinformation regions ( 60, 62 ) in which the cells each include different combinations of mapped regions of the partial target images ( 40, 42 ), and the microinformation regions ( 60, 62 ) being arranged in the shape of specified image motifs that exhibit information-bearing image patterns whose dimensions are below the resolution limit of the human eye.

First claim

We claim:

1. A depiction arrangement for security papers, value documents, electronic display devices or other data carriers, comprising a grid image arrangement for depicting a target image that is broken down into two or more partial target images, said depiction arrangement comprising:
(a) a motif image that is subdivided into a plurality of periodically or at least locally periodically arranged cells in each of which are arranged mapped regions of one or more of the partial target images,
(b) a viewing grid optically connectable to the motif image, said viewing grid composed of a plurality of viewing elements for viewing the motif image through the viewing grid, wherein the viewing grid, when the motif image is viewed through the viewing grid, reconstructs a complete target image from the mapped regions arranged in the cells,
wherein the motif image, independently of the cell subdivision, is split and comprises at least first and second microinformation regions in which the cells each include different combinations of mapped regions of the partial target images, and wherein the microinformation regions are arranged in a shape of specified image motifs configured to exhibit information-bearing image patterns having dimensions that are below 100 μm;
wherein the depiction arrangement comprises a magnification arrangement selected from the group consisting of:
(i) a moiré magnification arrangement in which the mapped regions of the cells of the motif image each constitute scaled-down images of the partial target images, which are completely accommodated within one cell;
(ii) a micro-optical moiré-type magnification arrangement in which the mapped regions of multiple spaced-apart cells of the motif image constitute in each case, taken together, a scaled-down image of one of the partial target images, whose dimension is larger than one cell of the motif image; and
(iii) a modulo magnification arrangement in which the mapped regions of the cells of the motif image each constitute non-complete sections of one or more of the partial target images, the non-complete sections configured to be mapped by a modulo operation.

2. The depiction arrangement according to claim 1 , characterized in that the microinformation regions each extend across multiple cells of the motif image.

3. The depiction arrangement according to claim 1 , characterized in that the microinformation regions at least partially intersect cell boundaries of the motif image cells.

4. The depiction arrangement according to claim 1 , characterized in that the information-bearing image patterns comprise pixels or lines.

5. The depiction arrangement according to claim 1 characterized in that the microinformation regions comprise alphanumeric characters, an alphanumeric character string or a logo.

6. The depiction arrangement according to claim 1 , characterized in that the image motifs of the microinformation regions repeat periodically or in non-periodic sequence within the motif image.

7. The depiction arrangement according to claim 1 , characterized in that the first and second microinformation regions each arranged in different specified regions within the motif image differ from each other, such that the image motifs of the respective microinformation regions change over an expanse of the motif image.

8. The depiction arrangement according to claim 1 , characterized in that the cells of the motif image each include mapped regions of only one of the partial target images, and the first and second microinformation regions include mapped regions of different partial target images.

9. The depiction arrangement according to claim 1 , characterized in that the arrangement of cells of the motif image and/or the viewing grid, in its periodic or at least locally periodic regions, exhibits no axis of symmetry in a plane defined by the arrangement or a plane defined by the grid.

10. The depiction arrangement according to claim 1 , characterized in that, upon tilting the depiction arrangement, the complete target image moves in a specified direction that, with respect to the tilt direction, encloses an angle γ not equal to 0° and not equal to 90°.

11. The depiction arrangement according to claim 1 , characterized in that the arrangement of cells of the motif image and the viewing grid form dissimilar lattices that are coordinated with each other such that, upon tilting the depiction arrangement, an orthoparallactic movement effect of the complete target image occurs.

12. The depiction arrangement according to claim 1 , characterized in that periodicity length or local periodicity length of the viewing grid and/or the periodicity length or the local periodicity length of the cells of the motif image is between 3 μm and 50 μm, between 5 μm and 30 μm, or between about 10 μm and about 20 μm.

13. The depiction arrangement according to claim 1 , characterized in that the viewing grid and the motif image are firmly joined together to form a security element having a stacked, spaced-apart viewing grid and motif image, especially in that the motif image and the viewing grid are arranged at opposing surfaces of an optical spacing layer.

14. The depiction arrangement according to claim 1 , characterized in that the viewing grid and the motif image are arranged at different positions of a data carrier such that the viewing grid and the motif image are stackable for self-authentication and, in the stacked state, form a security element.

15. The depiction arrangement according to claim 1 , characterized in that the grid image arrangement for depicting the target image that is broken down into two or more partial target images is combined with at least one further grid image arrangement for depicting the target image that is not broken down into partial target images.

16. The depiction arrangement according to claim 1 , wherein the information-bearing image patterns have dimensions between 27 μm and 90 μm.

17. A depiction arrangement for security papers, value documents, electronic display devices or other data carriers, comprising a grid image arrangement for depicting a target image that is broken down into two or more partial target images, said depiction arrangement comprising:
(a) a motif image that is subdivided into a plurality of periodically or at least locally periodically arranged cells in each of which are arranged mapped regions of one or more of the partial target images,
(b) a viewing grid optically connectable to the motif image, said viewing grid composed of a plurality of viewing elements for viewing the motif image through the viewing grid, wherein the viewing grid, when the motif image is viewed through the viewing grid, reconstructs a complete target image from the mapped regions arranged in the cells,
wherein the motif image, independently of the cell subdivision, is split and comprises at least first and second microinformation regions in which the cells each include different combinations of mapped regions of the partial target images, and wherein the microinformation regions are arranged in a shape of specified image motifs configured to exhibit information-bearing image patterns having dimensions that are below 100 μm;
wherein the viewing elements comprise optical device selected from the group consisting of:
(i) non-cylindrical microlenses or concave microreflectors, especially by microlenses or concave microreflectors having a circular or polygonally delimited base area;
(ii) elongated cylindrical lenses or concave cylindrical reflectors whose dimension in a longitudinal direction of the cylindrical lenses measures more

Assignees

• Giesecke & Devrient Currency Technology Gmbh

Inventors

• Kaule Wittich
• Rahm Michael
• Rauscher Wolfgang

Classifications

• B42D25/324

  Reliefs · CPC title

• B42D25/00 Primary

  Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof (printing processes to produce identification or security features B41M3/14) · CPC title

• Y10T29/49002

  Electrical device making · CPC title

• G06T3/4053 Primary

  based on super-resolution, i.e. the output image resolution being higher than the sensor resolution · CPC title