Transparent Conductive Substrate with Irregular Pattern for Moire Reduction
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Solution Overview
Problem
Existing display devices face challenges with the moire phenomenon and diffraction patterns caused by electromagnetic wave shield films and touch panels, which interfere with pixel and electrode patterns, especially in large-scale displays with high-resolution plasma display panels, where conventional methods of controlling line width, pitch, and angle are insufficient.
Innovation Solution
A transparent conductive substrate with a conductive pattern featuring line breakage and an irregular pattern shape is used, which includes a transparent substrate with a conductive pattern comprising line breakage portions forming an irregular pattern, minimizing the moire and diffraction phenomena by adjusting the number of cross points and pitch to maintain conductivity and optical properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a metal mesh pattern is used for electromagnetic wave shielding and touch panel functionality, then conductivity is improved, but moire phenomenon and diffraction patterns occur due to interference with pixel and electrode patterns
Solution Approach 1:
The patent applies asymmetry by using an irregular pattern instead of a regular mesh pattern. The conductive pattern consists of curved lines with varying curvature radii and irregular spacing, which breaks the periodicity that causes moire interference while maintaining conductivity through continuous curved paths
Solution Approach 2:
The patent segments the continuous conductive pattern into multiple curved line portions with different curvature radii. These segmented portions are arranged irregularly to prevent periodic interference patterns while maintaining overall conductivity through the segmented conductive paths
2Object-affected harmful factors
If the line width, pitch, and angle of the metal mesh pattern are controlled to reduce moire, then moire phenomenon is minimized, but the solution becomes inadequate for high-resolution displays with precise pixel patterns
Solution Approach 1:
The irregular pattern with varying curvature radii and non-uniform spacing provides inherent adaptability to different display resolutions. The asymmetric design does not rely on specific pitch or angle parameters, making it universally applicable across various pixel densities and display technologies
Solution Approach 2:
The patent changes the fundamental parameter from regular geometric dimensions (pitch, angle, line width) to irregular curvature radii and spacing variations. This parameter transformation allows the pattern to adapt to different display resolutions without requiring re-optimization of fixed geometric parameters
3Ease of manufacture
If a regular pattern is used for the conductive layer, then manufacturing is simplified, but diffraction patterns occur due to periodic structure
Solution Approach 1:
The patent replaces symmetric regular patterns with asymmetric irregular curved patterns. The varying curvature radii and irregular spacing eliminate the periodic structure that causes diffraction, while the continuous curved lines maintain manufacturability through standard deposition and patterning processes
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 effectively minimizes the moire and diffraction phenomena while ensuring excellent conductivity and maintaining uniform transmittance and conductivity, making it suitable for large-scale displays without significantly impacting the display's optical properties.
Implementation Method 1
there is a problem in that the electromagnetic wave shield film and the touch panel cause interference with a pixel pattern and an electrode pattern of the display or a pattern structure of another optical film, thus causing a moire phenomenon
Implementation Method 2
which can control occurrence of a moire phenomenon and a diffraction pattern
Data Source
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AI summary
The present invention provides a transparent conductive substrate comprising:: a transparent substrate, and a conductive pattern provided on the transparent substrate, wherein the conductive pattern comprises line breakage portions performing electric breakage, and a pattern of a broken line formed when the line breakage portions are connected comprises an irregular pattern shape. The present invention can minimize a moiré phenomenon and a diffraction phenomenon by external light by performing line breakage of a regular or irregular conductive pattern by using the irregular pattern.