Nested Micro-Element Security Element for Clear Tilt-Dependent Motifs
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Solution Overview
Problem
Existing security elements with tilting-dependent motifs often present an unappealing superimposed view and are difficult for untrained viewers to recognize, leading to potential forgery issues due to lack of clear motif transition.
Innovation Solution
A security element with nested micro-elements arranged in specific patterns, allowing motifs to transition smoothly and distinctly by altering their visibility based on tilt, using micro-mirrors with ink coatings or other structures, ensuring clear separation and dynamic color changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If micromirrors are arranged with positive mirror gradient in one section and negative mirror gradient in another section to achieve motif switch, then two motifs become visible from specific viewing angles, but the motifs are spatially superimposed in perpendicular plan view creating an optically unappealing impression
Solution Approach 1:
The areal region is divided into a first zone and a second zone with distinct functions. The first zone contains micromirrors with positive mirror gradient for displaying the first motif, while the second zone contains micromirrors with negative mirror gradient for displaying the second motif. This spatial segmentation prevents superimposition and creates clear visual separation between motifs.
Solution Approach 2:
Different regions of the security element are assigned different optical properties. The first zone has micromirrors oriented to reflect light for perpendicular viewing, while the second zone has micromirrors oriented for oblique viewing. This local differentiation ensures that each motif is optimally displayed from its intended viewing angle without interfering with the other.
2Adaptability or versatility
If two motifs are arranged to be visible from specific viewing angles, then motif switching capability is achieved, but untrained viewers cannot separate the two motifs in perpendicular plan view making recognition difficult
Solution Approach 1:
The security element is divided into two distinct zones with clear spatial separation. The first zone displays the first motif in perpendicular plan view, while the second zone displays the second motif only at oblique angles. This segmentation allows untrained viewers to easily recognize the first motif without being confused by superimposed patterns, while still providing the motif switching capability.
Solution Approach 2:
The first motif is pre-configured to be visible in perpendicular plan view, providing an initial visual indicator that attracts viewer attention. This preliminary visual information guides viewers to tilt the security element to reveal the second motif, creating a logical viewing sequence that simplifies recognition.
3Adaptability or versatility
If micromirrors are arranged to display motifs at oblique angles, then tilt-dependent motif depiction is achieved, but the motifs are superimposed in the middle view creating an unappealing optical impression
Solution Approach 1:
The areal region is segmented into a first zone for the first motif and a second zone for the second motif. The first zone contains micromirrors with positive mirror gradient that display the first motif clearly in perpendicular view, while the second zone contains micromirrors with negative mirror gradient for oblique viewing. This eliminates superimposition and ensures optimal visual appeal at all viewing angles.
Solution Approach 2:
The solution transitions from a two-dimensional superimposed display to a three-dimensional spatial arrangement where motifs are separated in the angular dimension. By assigning different angular viewing ranges to different zones, the patent creates a multi-dimensional display space that prevents overlap and enhances visual clarity.
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
Enhances recognition and forgery-proofing by providing a clear, continuous motif transition and distinct color changes, making it difficult to replicate, thus improving security.
Implementation Method 1
The micro-elements are formed as micro-mirrors... the mirror gradient along the perpendicular to the tilting axis has only positive values in one section and only negative values in another section
Data Source
AI summary
A security element for manufacturing value documents has a structure including first and second motifs which change their appearance when the security element is tilted over a tilting angle range. The structure has first micro-elements, which are arranged with a first pattern and a first motif, and second micro-elements, which are arranged with a second pattern and a second motif. The first and second patterns are nested within each other on an areal region of the security element and have different visual appearances according to the tilting of the securing element.