Dynamic-Effect Security Feature With Proximity Color Enhancement
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Solution Overview
Problem
Current security documents lack effective, easily recognizable features for authentication that do not require complex tools, and existing dynamic-effect pigments do not fully utilize their potential for creating dynamic and recognizable patterns under illumination.
Innovation Solution
Incorporating dynamic-effect components, such as self-modulated fluorescent pigments, into security documents alongside proximity features that enhance or complement their color appearances, allowing for a 'level-two security feature' that changes visibly under UV or IR illumination, enabling easy authentication with a simple light source.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If dynamic-effect pigments are used to create authentication features, then the security feature becomes more recognizable and dynamic under illumination, but the complexity of the authentication system increases
Solution Approach 1:
The dynamic-effect pigment automatically changes its optical properties when exposed to illumination, providing the authentication effect without requiring external control mechanisms or complex authentication devices. The pigment self-regulates its fluorescence and photochromic response based on the illumination it receives, eliminating the need for complex system controls.
Solution Approach 2:
The patent utilizes pigments that dynamically change their color appearance through fluorescence and photochromic effects when exposed to illumination. This allows the security feature to display different visual characteristics under different lighting conditions, providing reliable authentication while maintaining simple implementation through inherent material properties rather than complex mechanical or electronic systems.
2Reliability
If multiple dynamic-effect components are combined to enhance the security feature, then the dynamic color appearance improves, but the manufacturing complexity increases
Solution Approach 1:
The patent combines fluorescent and photochromic pigments in a composite ink formulation, allowing both dynamic effects to work together in a single applied layer. This composite approach enhances the security feature's recognizability and dynamic color appearance while simplifying manufacturing compared to applying multiple separate layers or components, as the combined effects are achieved through a unified material composition.
3Ease of operation
If proximity features are added to enhance the dynamic-effect feature, then the visual recognition under illumination improves, but the device complexity increases
Solution Approach 1:
The patent incorporates proximity features with specific optical properties in localized areas adjacent to the dynamic-effect feature. These proximity features have tailored color appearances that complement and enhance the dynamic-effect feature's visual recognition under illumination. By placing enhanced features only where needed for authentication comparison rather than throughout the entire document, the visual recognition is improved while maintaining relatively simple overall structure.
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 combination of dynamic-effect and proximity features creates a recognizable, dynamically changing pattern that enhances security document authentication, providing a reliable and straightforward method to verify document authenticity without needing advanced tools.
Implementation Method 1
self-modulated fluorescent pigments, namely pigment components that fluoresce under exposure to incident excitation light
Implementation Method 2
photochromic dyes gradually modulate the fluorescence produced by the fluorescent dyes as the photochromic dyes are being activated by the incident excitation light
Data Source
AI summary
There is described a security element or document comprising a substrate (20) and at least a first dynamic-effect feature (100; 120; 121; 122; 123; 130; 135; 140; 150; 171; 181; 191; 200) provided on the substrate which includes a dynamic-effect component that is responsive to illumination stimulus of a selected excitation wavelength or wavelength band to produce an optical spectral response, which optical spectral response changes dynamically over an observable period of time between multiple color appearances (C, F, M; C1, M1) upon and while being subjected to the illumination stimulus. The first dynamic-effect feature is provided in a region of the substrate which is proximate or adjacent to at least one proximity feature (101, 102; 120a, 120b; 121a, 121b; 122a, 122b; 123a, 123b; 131, 132, 133; 136, 137; 141, 142; 151, 160; 172; 182, 183; 192; 201, 205, 206) provided on the substrate, which at least one proximity feature has a color appearance which is selected to enhance and/or complement at least one of the multiple color appearances of the first dynamic-effect feature.