Tamper-Resistant Fluorescent Forgery Prevention Medium
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Solution Overview
Problem
Existing methods for forming invisible latent images using fluorescent materials are susceptible to image alteration when the UV non-transmission layer is peeled off and replaced, compromising the integrity of the recorded image.
Innovation Solution
A forgery prevention medium is created with a substrate and a specific invisible material layer that can be inactivated using a laser to form a visualized image pattern, employing fluorescent materials or temperature-indicating materials that change state in response to UV or IR radiation, enhancing tamper resistance by selectively inactivating pixels to maintain the image integrity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a UV ray non-transmission layer is laminated on a fluorescent material layer to form an invisible latent image, then the image can be selectively formed by UV irradiation, but the image integrity is compromised when the UV non-transmission layer is peeled off and replaced
Solution Approach 1:
The invention divides the protective layer into multiple UV non-transmission layers with different patterns. Each layer can be independently peeled and replaced, allowing the fluorescent material layer to remain intact while enabling flexible maintenance and replacement of individual pattern layers without compromising image integrity
Solution Approach 2:
The invention pre-laminates multiple UV non-transmission layers with different patterns onto the fluorescent material layer during manufacturing. This preliminary arrangement of multiple replaceable layers ensures that the fluorescent material is permanently protected while allowing future selective replacement of pattern layers to maintain or update images
2Reliability
If fluorescent material is applied to one surface and a UV non-transmission layer is laminated to create an invisible latent image, then the image can be formed selectively, but the system becomes vulnerable to tampering through layer removal and replacement
Solution Approach 1:
The invention creates a composite structure consisting of a fluorescent material layer permanently laminated to a substrate, with multiple UV non-transmission pattern layers laminated on top. This composite structure provides inherent tamper resistance because the fluorescent material remains permanently attached to the substrate, making any attempt at replacement detectable through fluorescent material transfer to the peeling surface
Solution Approach 2:
The invention utilizes the fluorescent properties of the material, which changes from invisible to visible when exposed to UV light. This color/state change mechanism allows the system to reveal tampering attempts, as any fluorescent material transferred during peeling becomes visible under UV illumination, providing a built-in security feature against forgery
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 improves the tamper resistance of the invisible latent image by ensuring that only specific pixels emit light or change color, maintaining the image pattern even when the UV or IR radiation is stopped, thereby preventing image alteration.
Implementation Method 1
a material (hereinafter, referred to as a fluorescent material) that absorbs an ultraviolet ray and emits a visible ray
Implementation Method 2
an information recording medium as a second layer is formed by laminating a photochromic material not allowing the transmission of a UV ray by laminating a UV ray thereon
Implementation Method 3
having a part of the specific invisible material inactivated in accordance with a visualized image pattern
Data Source
AI summary
A forgery prevention medium includes a substrate and a specific invisible material layer directly or indirectly laminated on the substrate, having a specific invisible material reversibly and visually recognized through a predetermined process disposed thereon in a plane shape, and having a part of the specific invisible material inactivated in accordance with a visualized image pattern.