Photon-Sensitive Identity Card Layers for Secure Color Personalization
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Solution Overview
Problem
Current methods for personalizing identity cards with color images are either not secure, require complex processing, or necessitate expensive equipment, especially when trying to verify the authenticity of the image and the person's identity.
Innovation Solution
A method involving photon-sensitive layers that transform from opaque to transparent or vice versa upon exposure to specific wavelengths and intensities of light, allowing for the creation of secure, tamper-resistant color images that appear gray under visible light but reveal colors under UV exposure, enhancing both identity verification and authenticity checks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If surface printed color personalization is used, then color images can be produced, but security is reduced compared to laser engraved photos
Solution Approach 1:
The patent embeds multiple functional layers within the card structure: a base layer with pre-printed color pixels, an overlay film with holographic security features, and photon-sensitive layers. This nested structure allows color images to be produced while maintaining security through the integrated holographic and photochromic elements that are embedded within the card itself.
Solution Approach 2:
The patent uses composite materials combining different functional properties: the overlay film integrates holographic material with photon-sensitive material, creating a composite structure that provides both color imaging capability and security features. The combination of pre-printed color pixels with photochromic layers creates a composite system that enables secure color personalization.
2Manufacturing precision
If digital printing is used before collation, then high quality color images can be placed on identity cards, but the manufacturing process becomes highly complicated
Solution Approach 1:
The patent applies digital printing to the base layer during the initial card manufacturing stage, before collation and personalization steps. The pre-printed color pixels are deposited on the base layer in advance, allowing subsequent personalization steps to simply reveal or activate the pre-existing color pattern rather than requiring complex real-time printing and collation processes.
Solution Approach 2:
The patent divides the card into functional segments: a base layer containing pre-printed color pixels, an overlay film with security features, and photon-sensitive layers. This segmentation allows each layer to be manufactured and prepared independently, then assembled through simpler collation processes, reducing overall manufacturing complexity while maintaining high image quality.
3Reliability
If laser engraving is used to personalize identity cards, then secure black and white images can be produced, but color images cannot be produced
Solution Approach 1:
The patent introduces photon-sensitive layers as an intermediary between the laser engraving process and the final color image. These layers act as a mediator that translates the secure laser-engraved pattern into a color image by selectively revealing or activating the pre-printed color pixels underneath, thereby maintaining security while enabling color capability.
Solution Approach 2:
The patent changes the physical parameters of the card layers through photon exposure. The overlay film transitions from opaque to transparent when exposed to specific wavelengths, and the photon-sensitive layers change their optical properties. This parameter change allows the same physical structure to provide both secure laser engraving and color imaging functionality.
4Reliability
If verification of coded areas is performed, then authenticity can be checked, but sophisticated and expensive material is necessary and verification is slowed down
Solution Approach 1:
The patent uses color changes as a simple verification mechanism. The overlay film contains holographic elements that display different colors or patterns when viewed from different angles or when exposed to UV light. This color-changing property provides authentic verification without requiring sophisticated decoding materials or complex verification processes, as the color transformation is directly observable.
Solution Approach 2:
The patent enables self-verification through the inherent optical properties of the overlay film. The holographic and photochromic elements automatically display verification patterns or color changes when exposed to UV light or viewed from different angles, without requiring external decoding equipment or sophisticated materials. The card itself performs the verification function through its built-in optical characteristics.
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
This solution enables secure, efficient personalization of identity cards with color images that are tamper-resistant and can be verified using UV light, improving both identity and authenticity checks without the need for complex processing or expensive equipment.
Implementation Method 1
a first photon-sensitive layer is visually opaque and transforms into visually transparent upon exposure to photons of a first selected wavelength and intensity
Implementation Method 2
a colored fluorescent pixel pattern is located on a surface of the medium and between the surface of the medium and the first photon-sensitive layer
Data Source
Figure 1
Figure 2
Figure 3(a)~3(b)
AI summary
Personalization of identity card by producing a colored fluorescent image thereon by selectively exposing photon-sensitive layers on the card to change between transparent and opaque thereby selectively revealing opaque colors from the photon- sensitive layer or from a printed substrate. Other systems and methods are disclosed.