3D Polymer-Pattern Security Code for Environmental Color Change
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Solution Overview
Problem
Existing security codes lack the ability to dynamically change color in response to environmental conditions, limiting their security and visual appeal.
Innovation Solution
A three-dimensional security code structure comprising a metal layer, dielectric and polymer patterns with varying thicknesses and materials, allowing color change based on environmental factors like humidity and temperature.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional security codes use fixed color patterns, then manufacturing is simple, but security and visual appeal are limited
Solution Approach 1:
The patent applies the dynamics principle by using polymer patterns that dynamically change their optical properties in response to environmental stimuli such as temperature, humidity, or pressure. These polymer patterns alter the reflected color of the security code when exposed to specific conditions, transforming a static security feature into a dynamic one that can verify authenticity through color changes, thereby enhancing security without requiring complex additional components.
Solution Approach 2:
The patent implements parameter changes by modifying the optical parameters of the security code through environmentally responsive polymer materials. The polymer patterns change their refractive index, thickness, or other physical parameters in response to external conditions, causing visible color changes in the reflected light. This allows the same physical structure to display different optical parameters under different conditions, enhancing security verification capabilities.
2Illumination intensity
If security codes use multiple colors and shapes, then visual effect is enhanced, but manufacturing complexity increases
Solution Approach 1:
The patent applies local quality by placing specific polymer patterns with distinct environmental responsiveness in particular regions of the security code where color enhancement is desired. Different polymer compositions or thicknesses are used in different locations to create varied visual effects across the code, while the base structure remains relatively simple and manufacturable. This allows selective enhancement of visual effect in critical areas without complicating the entire manufacturing process.
3Adaptability or versatility
If polymer patterns with varying thickness are used, then color change capability is achieved, but manufacturing precision requirements increase
Solution Approach 1:
The patent employs the dimensionality change principle by utilizing the thickness dimension of polymer patterns as an additional degree of freedom for controlling optical properties. By varying the thickness of polymer layers in the vertical dimension, the security code achieves different reflected colors and environmental responsiveness. This approach converts a two-dimensional pattern problem into a three-dimensional structure, enabling color differentiation through thickness variation rather than requiring complex lateral patterning, thereby managing manufacturing precision requirements.
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 security code effectively changes color in response to environmental changes, enhancing security and visual differentiation of data regions, improving recognition and authentication.
Implementation Method 1
a three-dimensional security code capable of storing two or more pieces of information according to a change in reflected color using a material that changes in volume according to a change in external environment
Implementation Method 2
The data pattern is formed by separating a light reflection region and a light absorption region with a contrast difference between a QR code color and a background color
Data Source
AI summary
Provided is a security code. The security code including a first region and a second region includes a metal layer, a first dielectric pattern provided on the metal layer in the first region, a polymer pattern provided on the metal layer in the second region, a first metal pattern provided on the dielectric pattern, and a second metal pattern provided on the polymer pattern, wherein the polymer pattern includes a material different from that of the first dielectric pattern, and a thickness of the polymer pattern is different from a thickness of the first dielectric pattern.