Security Element with Register-Accurate Optically Variable Layers
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Solution Overview
Problem
Current security elements for documents lack a high level of security against forgery, particularly under varying viewing angles and lighting conditions, as their optically variable features are difficult to differentiate and separate due to their inherent nature.
Innovation Solution
A security element with register-accurate arrangement of optically variable structures and colored layers, utilizing multiple layers with specific functions such as release, adhesion, and reflection layers, applied through precise printing and coating processes to create distinct and easily distinguishable effects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If optically variable security features are used to improve counterfeit protection, then security level is improved, but the features become difficult to differentiate from one another under various viewing angles
Solution Approach 1:
The patent divides the security element into multiple distinct layers, with each layer containing specific optically variable structures (relief structures, diffractive structures, reflective structures) and coloring layers. This segmentation allows each layer to contribute a unique optical effect that can be individually distinguished, resolving the differentiation difficulty while maintaining high counterfeit protection through the combined effect of all layers.
Solution Approach 2:
Different regions and layers of the security element are assigned different optical properties and structures. For example, first layers contain first optically variable structures with specific colors, while second layers contain second optically variable structures with different colors and structures. This local differentiation ensures that each part contributes uniquely to the overall security effect, making the features easily distinguishable while maintaining high security.
2Reliability
If multiple layers with precise registration are used to improve security and differentiation, then counterfeit protection is improved, but manufacturing complexity and precision requirements increase
Solution Approach 1:
The patent incorporates registration marks and alignment features directly into the structure of the layers during the manufacturing process. These preliminary alignment elements are built into the layers before final assembly, enabling precise registration to be achieved systematically rather than requiring complex post-manufacturing adjustment, thus managing manufacturing precision requirements while maintaining high security.
3Ease of operation
If transparent or translucent color layers are used to allow viewing of underlying structures, then verification capability is improved, but the underlying optically variable structures may be obscured
Solution Approach 1:
The patent uses transparent or translucent color layers that are specifically formulated to allow certain wavelengths of light to pass through while blocking others. This enables the underlying optically variable structures to remain visible through the color layers, maintaining both the verification capability (by allowing light transmission) and the visibility of optical effects (by selective wavelength transmission). The color layers modify the appearance without completely obscuring the underlying structures.
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
The solution provides a high level of security against forgery by ensuring clear differentiation of optically variable effects under all viewing angles and lighting conditions, making it difficult for counterfeiters to replicate, and enhancing the visual authenticity of the security document.
Implementation Method 1
a first security feature 2a of the two or more security features 2 generates at least one first optically variable effect and the second security feature 2b generates at least one second optically variable effect
Implementation Method 2
which serve the purpose of improving the counterfeit protection of the corresponding security documents. Further security features are known that exhibit optically variable effects to the human observer
Implementation Method 3
a first security feature 2a of the two or more security features 2 comprises one or more first layers 21 and a second security feature 2b of the two or more security features 2 comprises one or more second layers 22
Data Source
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AI summary
The invention relates to a method and to a security element having a front side and a rear side opposite the front side, wherein the security element has two or more security features, wherein a first security feature of the two or more security features comprises one or more first layers and a second security feature of the two or more security features comprises one or more second layers, wherein the first security feature and the second security feature are arranged in particular in register with one another, wherein the first security feature generates at least one first optically variable effect and the second security feature generates at least one second optically variable effect, wherein the at least one first optically variable effect has a first color and the at least one second optically variable effect has a second color, wherein the first color and the second color differ from one another. The invention also relates to a method for producing a security element.