Optically Variable Ghost Image for Tamper-Resistant ID Lamination
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Solution Overview
Problem
Identification documents face challenges in security and authenticity due to stresses from roll laminating processes and the presence of adhesives, which can lead to tampering and difficulties in verifying the authenticity of embedded information.
Innovation Solution
The integration of optically variable ghost images with graphical identifiers that change appearance when viewed from different angles, allowing for improved security features by embedding data within the laminate layer, making it difficult for forgers to replicate and enhancing verification processes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If roll laminating processes are used to laminate identification documents, then the lamination process can be automated and productivity increased, but thermal stresses develop and adhesives are required which promote tampering and separation
Solution Approach 1:
The patent removes adhesives from the lamination process entirely, extracting the harmful element that causes tampering and separation. The laminate layers are bonded through heat and pressure alone, eliminating the adhesive layer that forgers could exploit to separate and replace document layers.
Solution Approach 2:
The patent replaces the chemical bonding mechanism (adhesives) with a physical bonding mechanism (heat and pressure). This substitution eliminates the need for adhesive materials while achieving secure lamination, thereby preventing tampering without sacrificing productivity.
2Ease of manufacture
If adhesives are used in lamination to bond layers, then ease of manufacture is improved, but security is worsened due to promotion of tampering and separation
Solution Approach 1:
The patent extracts adhesives from the manufacturing process, eliminating the security vulnerability they create. The layers are bonded directly through heat and pressure applied during lamination, removing the adhesive interface that forgers could exploit to separate and manipulate document layers.
Solution Approach 2:
The patent converts the potential harm of adhesive failure into a benefit by using heat and pressure to create a stronger, more integrated bond between layers. The thermal energy that could cause stress is instead used to fuse layers together, making tampering more difficult while maintaining ease of manufacture.
3Reliability
If graphical identifiers are embedded in the ghost image within the laminate layer, then authenticity verification is improved, but device complexity increases
Solution Approach 1:
The patent merges the graphical identifier embedding process with the existing ghost image creation and lamination processes. By integrating these functions into a unified workflow, the system achieves enhanced authenticity verification without proportionally increasing overall device complexity.
Solution Approach 2:
The patent makes the lamination and printing system multi-functional by combining ghost image creation, graphical identifier embedding, and secure lamination into a single integrated process. This universal approach allows one system to perform multiple security functions, reducing the need for separate specialized devices.
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 optically variable ghost image enhances the security and authenticity verification of identification documents by providing a unique visual effect that is challenging to replicate, thereby improving the document's resistance to tampering and counterfeiting.
Implementation Method 1
a first appearance when viewed from a front of the identification document in reflected light at a first angle and a second, different appearance when viewed from the front of the identification document in reflected light in a second, different angle
Data Source
AI summary
Techniques are described to embed graphical identifiers into a ghost image within a layer of laminate of an identification document. The ghost image includes optically variable media that has a first appearance when viewed from a front of the identification document in reflected light at a first angle and a second, different appearance when viewed from the front of the identification document in reflected light in a second, different angle. During the ghost image generation process, a graphical identifier can be placed on a baseline ghost image to generate an adjusted ghost image. Once the adjusted ghost image is printed onto the identification document, the graphical identifier can be viewable based on the appearance of the adjusted ghost identifier in relation to the reflected light.