Irregular Metal Mesh Conductive Pattern for Touch Panels
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Solution Overview
Problem
The existing touch panels, particularly resistive and capacitive types, face challenges with high resistance and cost issues due to the use of ITO films, and the integration of metal patterns in display devices leads to the Moire phenomenon, which affects visual recognition and electromagnetic wave shielding efficiency.
Innovation Solution
An electrical conductor with a transparent substrate and an electric conductive pattern that covers 30% or more of the area, featuring a distance distribution ratio of standard deviation to average value of 2% or more, preventing the Moire phenomenon while maintaining excellent conductivity, formed using methods like printing, photolithography, or sputtering.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a transparent conductive film such as ITO film is used in touch panels, then the touch function can be implemented, but the resistance becomes high (100 ohms/square or more) and the cost increases
Solution Approach 1:
The patent replaces expensive ITO transparent conductive film with a metal pattern that can be formed through printing processes. The metal pattern uses conventional metal materials and printing techniques, significantly reducing manufacturing cost while maintaining the necessary conductive function for touch panels.
Solution Approach 2:
The patent changes the material parameter from transparent conductive oxide (ITO) to metal pattern, and adjusts the structural parameters (line width, pitch, arrangement) to achieve the desired electrical conductivity and touch sensitivity without incurring high material costs.
2Ease of manufacture
If a metal pattern is used in display devices, then the manufacturing cost is reduced, but the Moire phenomenon occurs due to interference between the metal pattern and pixel patterns
Solution Approach 1:
The patent introduces asymmetry and irregularity into the metal pattern design. Instead of using regular, periodic patterns that cause Moire interference, the metal lines are arranged with varying pitches, widths, and positions, breaking the periodicity that leads to Moire phenomenon while maintaining electrical conductivity.
Solution Approach 2:
The patent applies different pattern characteristics to different regions of the display. The metal pattern density, line width, and spacing are locally adjusted according to the pixel arrangement and functional requirements, optimizing both conductivity and Moire suppression in different areas of the display device.
3Object-affected harmful factors
If the line width and pitch of metal mesh pattern are controlled to remove Moire phenomenon, then visual quality improves, but the conductivity may be compromised
Solution Approach 1:
The patent compensates for reduced conductivity (caused by smaller line widths and larger pitches to eliminate Moire) by optimizing the pattern in multiple dimensions - using multi-layer metal patterns, varying line thickness, and creating three-dimensional conductive pathways that maintain electrical performance despite reduced two-dimensional pattern density.
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 prevents the Moire phenomenon, enhances conductivity, and improves visual recognition and electromagnetic wave shielding, making it suitable for large-scale screen applications without increasing manufacturing costs.
Implementation Method 1
an electric conductive pattern which is provided on at least one side of the transparent substrate... prevents a Moire phenomenon
Implementation Method 2
formed using methods like printing, photolithography, or sputtering
Data Source
AI summary
Provided are an electrical conductor and a production method therefor; the electrical conductor comprising a transparent substrate and an electro-conductive pattern provided on at least one surface of the transparent substrate, and the electroconductive pattern being of a type such that, for at least 30% of the entire surface area of the transparent substrate, when a straight line is drawn intersecting the electroconductive pattern, the ratio of the standard deviation to the mean value of the distances between adjacent points of intersection between the straight line and the electroconductive pattern (the distance distribution ratio) is at least 2%. Also, provided are an electrical conductor and a production method therefor; the electrical conductor comprising a transparent substrate and an electroconductive pattern provided on at least one surface of the transparent substrate, and the electroconductive pattern being of a type such that at least 30% of the entire surface area of the transparent substrate is accounted for by continuously distributed closed motifs, and the ratio of the standard deviation to the mean value of the surface areas of the closed motifs (the surface area distribution ratio) is at least 2%.