Double-Sided Security Element With In-Register Patterns
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Solution Overview
Problem
Current security elements lack advanced features to effectively prevent forgery and provide both visual and machine-readable security measures, particularly in documents like banknotes and ID cards, with limited durability and visibility of security features.
Innovation Solution
A security element with a transparent film featuring patterns on both sides, a color-changing layer, and a magnetic material, where the patterns on both sides are in register, providing distinct visual effects in transmitted and reflected light, and a magnetic coding that is invisible in visual inspection but machine-readable, enhancing durability with protective and optically active coatings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple security features are added to enhance security, then security reliability is improved, but device complexity increases
Solution Approach 1:
The patent combines multiple security features (transparent patterns, color-changing layer, magnetic coding) into a single integrated security element that can be applied to documents. This merging approach maintains high security reliability while avoiding the complexity of separate security components.
Solution Approach 2:
The security element serves multiple functions simultaneously: visual verification through transparent patterns, optical verification through color-changing effects, and machine verification through magnetic coding. This multi-functionality enhances security without requiring multiple separate devices.
2Measurement precision
If invisible magnetic coding is added for machine reading, then measurement precision is improved, but ease of operation deteriorates
Solution Approach 1:
The security element separates verification functions into distinct layers: visible patterns for human inspection and invisible magnetic coding for machine reading. This segmentation allows each function to operate independently without interfering with the other, maintaining both measurement precision and ease of operation.
3Reliability
If color changing layer is applied to enhance visual security, then reliability is improved, but manufacturing precision requirements increase
Solution Approach 1:
The patent uses thin film structures for the color-changing layer and transparent patterns. These thin films can be applied flexibly to the substrate, reducing the need for complex alignment procedures and lowering manufacturing precision requirements while maintaining visual security effectiveness.
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 enhanced security features with improved visibility of color changes and patterns in various lighting conditions, combined with machine-readable magnetic coding, significantly reducing forgery potential and increasing durability.
Implementation Method 1
The layer of polymeric liquid crystal material is optically active and develops a colour change or colour shift depending on the angle of observation
Implementation Method 2
Magnetic codes based on different coercivity, patterns or the like are typical examples for such characteristics
Data Source
Figure 1A~1B
Figure 2A~2B
AI summary
The invention describes a security element having a transparent film (1), a pattern (2) of transparent (22) and non-transparent regions (21) on a first side A of the film, and a pattern (3) of transparent (32) and non-transparent regions (31) on a second side B of the film (1). The pattern (3) on the second side B of the film (1) matches or is in register with the pattern (2) on the first side A of the film (1). A colour changing layer (4) covers the pattern (2,3) on at least one side A, B of the transparent film (1).