Optically variable surface pattern

Patent metadata

Field	Value
Publication number	US-9734735-B2
Application number	US-201414766205-A
Country	US
Kind code	B2
Filing date	Jan 30, 2014
Priority date	Feb 7, 2013
Publication date	Aug 15, 2017
Grant date	Aug 15, 2017

Abstract

An optically variable surface pattern is made available, having at least two partial areas with reflection elements, wherein the reflection elements of the first partial region on the one hand and the reflection elements of the second partial region on the other hand reflect impinging light in different reflection directions. The first partial region is so covered with a first glazing ink layer that a viewer, upon a change of the viewing angle at which the viewer views the optically variable surface pattern, sees the first partial region glow in a first color upon reaching a first viewing angle. The second partial region glows in a second color that is different from the first color upon reaching a second viewing angle.

First claim

The invention claimed is:

1. An optically variable surface pattern having at least two partial regions with reflection elements;
wherein the reflection elements of the first partial region on the one hand and the reflection elements of the second partial region on the other hand reflect impinging light in different reflection directions;
wherein the first partial region is so covered with a first glazing ink layer that a viewer, upon a change of the viewing angle at which the viewer views the optically variable surface pattern and despite the absence of an interference coating, sees the first partial region glow in a first color upon reaching a first viewing angle, and the second partial region glow in a second color that is different from the first color upon reaching a second viewing angle, the color in which each partial region lights up being adjustable using only the first glazing ink layer, wherein, for the viewer, upon changing the viewing angle, the partial regions glow consecutively in such a fashion that a movement of a motif is reproduced, wherein at least a part of the motif glows consecutively in the corresponding colors of the partial regions, and wherein a part of the motif always glows in the same color upon viewing at the corresponding viewing angles of the partial regions.

2. The optically variable surface pattern according to claim 1 , wherein the second partial region is covered with a second glazing ink layer which differs in color tone from the first glazing ink layer.

3. The optically variable surface pattern according to claim 1 , wherein the reflection elements reflect achromatically.

4. The optically variable surface pattern according to claim 1 , wherein at least one further partial region with reflection elements is provided, which is covered with a further glazing ink layer, wherein the reflection elements of the further partial region are so oriented that the viewer, upon changing the viewing angle, sees the further partial region glow in a color that differs from the first and/or second color upon reaching a further viewing angle.

5. The optically variable surface pattern according to claim 1 , wherein a sequence of the colors of the partial regions glowing consecutively upon changing the viewing angle contains a color change to and/or from the color white.

6. The optically variable surface pattern according to claim 1 , wherein a sequence of the colors of the partial regions glowing consecutively upon changing the viewing angle has at least one color several times.

7. The optically variable surface pattern according to claim 1 , wherein a sequence of the colors of the partial regions glowing consecutively upon changing the viewing angle is different to a sequence which would occur by interference in a thin-film coating.

8. The optically variable surface pattern according to claim 1 , wherein it has a reference region which always glows in the same color at the corresponding viewing angles of the partial regions.

9. The optically variable surface pattern according to claim 1 , wherein the first and the second partial region are so mutually interlaced that an apparently uniform region is presented to the viewer, said region glowing in the first color when viewed at the first viewing angle, and in the second color when viewed at the second viewing angle.

10. The optically variable surface pattern according to claim 1 , wherein reflection elements of at least one of the partial regions are formed by relief structures with ray-optically active reflective facets.

11. The optically variable surface pattern according to claim 1 , wherein reflection elements of at least one of the partial regions are formed by optically-diffractively active reflective relief structures.

12. The optically variable surface pattern according to claim 1 , wherein reflection elements of at least one of the partial regions are realized by oriented pigments of a printing ink.

13. The optically variable surface pattern according to claim 1 , wherein reflection elements of at least one of the partial regions are formed by relief structures in a metalized foil.

14. The optically variable surface pattern according to claim 1 , wherein the colors which the partial regions have to the viewer upon viewing are independent of the viewing angle.

15. The optically variable surface pattern according to claim 1 , wherein the first glazing ink layer has a register accuracy of less than 200 μm with the reflection elements of the first partial region.

16. The optically variable surface pattern according to claim 1 , wherein the optically variable surface pattern is provided as a security element for a security paper or value document.

17. A value document with an optically variable surface pattern according to claim 1 .

Assignees

• Giesecke & Devrient Gmbh
• Glesecke & Devrient Gmbh

Inventors

• Fuhse Christian
• Rauch Andreas
• Hoffmuller Winfried

Classifications

• B42D2033/20

  Operations & Transport · mapped topic

• B42D2035/16

  Operations & Transport · mapped topic

• B42D25/324

  Reliefs · CPC title

• B42D2033/06

  Operations & Transport · mapped topic

• B42D25/355

  Security threads · CPC title