Security Element with Color-Shifting and Moving Image Regions
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Solution Overview
Problem
Current security elements for papers of value lack sufficient protection against forgery, as they primarily rely on static color-shifting effects which can be easily replicated, failing to provide robust authentication under varying lighting conditions and viewing angles.
Innovation Solution
Incorporating a second region with structures that reflect an image motif, creating a moving image effect when the light source is moved or the viewing angle changes, combined with a color-shifting effect, utilizing layers such as color-shifting pigments, liquid crystals, and metallic materials to enhance security, particularly using a carrier layer of plastic and reflective layers to project image motifs in different spatial regions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If static color-shifting effects are used in security elements, then the security element can be easily manufactured with color-shifting pigments or liquid crystal layers, but the protection against forgery is insufficient because the effect can be easily replicated
Solution Approach 1:
The patent combines two distinct optical effects (color-shifting effect and moving image effect) into a single security element. The color-shifting region and the region with moving image structures are integrated in the same security element, creating a composite security feature that requires replication of multiple complex optical phenomena simultaneously, thereby significantly increasing forgery difficulty.
Solution Approach 2:
The security element uses composite structures including color-shifting pigments or liquid crystal layers combined with specific optical structures (facets, microlenses, diffraction gratings). This composite approach creates multiple overlapping optical effects that are difficult to replicate with single-material solutions.
2Reliability
If only color-shifting effects are used, then the security element has simple structure, but the authentication capability under varying lighting conditions and viewing angles is insufficient
Solution Approach 1:
The patent introduces dynamic characteristics to the security element through the moving image effect. The optical structures (facets, microlenses, or diffraction gratings) are designed to reflect or refract light in a way that creates apparent movement of the image when the viewing angle or light source position changes. This dynamic behavior provides authentication capability under varying lighting conditions and viewing angles.
Solution Approach 2:
The security element has different regions with different optical properties: a color-shifting region with specific pigments or liquid crystals, and a moving image region with specific optical structures. Each region provides a different optical effect that contributes to the overall authentication capability, allowing verification from multiple angles and lighting conditions.
3Reliability
If moving image structures are added to create dynamic authentication, then the security against forgery is improved, but the manufacturing complexity increases
Solution Approach 1:
The security element is divided into distinct functional regions: color-shifting regions with specific pigments or liquid crystal layers, and moving image regions with optical structures such as facets, microlenses, or diffraction gratings. This segmentation allows each region to be optimized and manufactured using specialized processes, then combined into the final security element.
Solution Approach 2:
The patent uses optical structures (facets, microlenses, diffraction gratings) to create the moving image effect without mechanical moving parts. These static structures produce dynamic optical effects through their geometric design, eliminating the need for complex mechanical systems while achieving the desired authentication capability.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This combination significantly increases protection against forgery by allowing both moving image and color-shifting effects to be perceived simultaneously, especially with point light sources, thereby enhancing the overall security of papers of value.
Implementation Method 1
a layer with color-shifting pigments, in particular interference pigments, pigments with a color-shifting thin-layer-structure or liquid crystal pigments, or a color-shifting thin-layer-structure
Implementation Method 2
the at least one first color-shifting region may have at least one liquid crystal layer, in particular at least one cholesteric liquid crystal layer
Implementation Method 3
when the light source is moved and/or the viewing angle is changed, a movement of the image motif and a color-shifting effect occurs at the same time
Implementation Method 4
the security element has at least one second region, different from the first region, with structures, which reflect an image motif in different spatial regions
Data Source
AI summary
A security element (1) for papers of value or security papers has at least one first color-shifting region (2), wherein the security element (1) additionally has at least one second region (3), different from the first region (2), with structures (4), which reflect an image motif in different spatial regions, such that a moving image is produced for an observer when a light source (5) is moved correspondingly and/or when a viewing angle is changed, wherein, when the light source is moved and/or the viewing angle is changed, a movement of the image motif and a color-shifting effect occurs at the same time.