Micro Mirror Array Layout for Multi-Plane Authentication Images
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Solution Overview
Problem
Existing anti-counterfeiting technologies, such as moiré patterns and holograms, are easily replicable and lack the 'wow factor' in displaying imagery, necessitating a more secure and visually striking solution for currency and brand authentication.
Innovation Solution
A visual display assembly using an array of micro mirrors oriented to reflect ambient light onto multiple planes, creating a three-dimensional image that can be viewed from two sides in a film process, which reflects the ambient light and displays an image in a plane spaced apart from the substrate, with each micro mirror set oriented to reflect light towards a specific point, allowing for multi-planar images that switch between light and dark with perspective changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional security features (holograms, embossed seals, color shifts) are used, then brand authentication capability is provided, but these features are easily replicated by counterfeiters and do not provide sufficient security
Solution Approach 1:
The security feature is divided into an array of individual micro mirrors, each independently controllable and oriented at specific angles. This segmentation allows complex authentication patterns to be created through simple individual mirror elements, making replication difficult while maintaining manufacturing feasibility.
Solution Approach 2:
The patent transitions from two-dimensional flat security features to three-dimensional micro mirror structures with specific orientations and angles. This adds spatial dimensionality to the authentication mechanism, creating depth-coded patterns that are extremely difficult to replicate with conventional printing or holographic methods.
2Measurement precision
If complex authentication features are implemented, then counterfeit detection capability improves, but manufacturing cost and complexity increase
Solution Approach 1:
The micro mirror array is designed to be self-assembling through automated fabrication processes. The mirrors automatically orient themselves to specific angles during manufacturing, eliminating the need for complex manual alignment procedures and reducing both manufacturing cost and complexity while maintaining high authentication precision.
Solution Approach 2:
The patent uses variations in mirror orientation angles and positions as the authentication parameter. By controlling these geometric parameters during manufacturing through automated processes, high detection precision is achieved without requiring complex post-manufacturing assembly or calibration procedures.
3Reliability
If existing security features are used, then some level of brand protection is achieved, but they can be replicated by counterfeiters with appropriate equipment
Solution Approach 1:
The micro mirrors are oriented at asymmetric, non-uniform angles throughout the array, creating unique authentication patterns that cannot be replicated by symmetric copying methods. This asymmetry ensures that even if counterfeiters obtain a sample, they cannot reproduce the precise angular relationships without specialized manufacturing equipment.
4Adaptability or versatility
If traditional security elements are implemented, then brand authentication is possible, but they lack the capability to provide multiple image displays from single structure
Solution Approach 1:
The single micro mirror array structure serves multiple authentication functions simultaneously by displaying different images at different viewing angles. The same physical structure provides both the first image visible from one angle and the second image visible from another angle, eliminating the need for separate security features for different authentication scenarios.
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 micro mirror array provides secure, multi-planar imagery that is difficult to replicate, offering a surprising visual effect with depth and high contrast, functioning on both sides of a transparent substrate and adaptable to various substrates like currency, labels, and coins.
Implementation Method 1
each having a reflective surface oriented to reflect the ambient light toward a same point on the plane corresponding to one of the pixels
Implementation Method 2
each having a reflective surface oriented to reflect the ambient light toward a same point on the second plane corresponding to one of the pixels of the second image
Data Source
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AI summary
A visual display assembly useful as a security element on paper and coin currency, product labels, and other objects, comprising a substrate; and on a surface of the substrate an array of micro mirrors receiving ambient light and, in response, displaying a first image in a plane spaced a distance H apart from the surface of the substrate. The first image comprises a plurality of pixels. The array of micro mirrors includes for each of the pixels a set of the micro mirrors, each having a reflective surface oriented to reflect the ambient light toward a same point on the plane corresponding to one of the pixels. Further in response to the receiving of the ambient light, the array of micro mirrors displays a second image in a second plane, spaced a distance apart from the plane displaying the first image. The second image comprises a plurality of pixels. The array of micro mirrors includes for each of the pixels of the second image a set of the micro mirrors, each having a reflective surface oriented to reflect the ambient light toward a same point on the second plane corresponding to one of the pixels of the second image. The reflective surface of each micro mirror within each set of micro mirrors, is oriented at a different angle. The micro mirrors in the set of micro mirrors, for each of the pixels, are arranged in a random pattern such that the mirrors do not provide a regular pattern.