Screen Device With Asymmetric Mesh Pattern To Avoid Moire
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Solution Overview
Problem
Conventional touch screen devices with capacitance-type mesh patterns face challenges in avoiding the moire phenomenon due to excessive irregularity in conductive wires, leading to a foreign substance feeling and reduced visibility, while also struggling to effectively shield electromagnetic waves.
Innovation Solution
A light-transmitting screen device with an electrically conductive mesh pattern formed on a film-shaped transparent substrate, featuring irregular polygons with varying pitch values within a specific range to prevent concentration and promote uniformity, ensuring high light transmittance and low sheet resistance for effective touch input and electromagnetic wave shielding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If irregularity is imparted to thin conductive wires to avoid moire phenomenon, then moire phenomenon is reduced, but thin conductive wires concentrate in unspecified regions forming foreign substance feeling and visibility is lowered
Solution Approach 1:
The patent applies asymmetry by using irregular polygons with varying pitch values instead of uniform patterns. The pitch values are deliberately made asymmetric and non-repeating, which prevents the regular interference patterns that cause moire effects while avoiding the concentration of conductive wires in specific regions.
Solution Approach 2:
The patent changes the pitch parameter of the irregular polygons within a controlled range (0.5 to 1.5 times a reference pitch value). This parameter variation allows the mesh pattern to avoid moire phenomenon through controlled irregularity while preventing excessive concentration of conductive wires, thus avoiding foreign substance feeling.
2Object-affected harmful factors
If excessive irregularity is imparted to mesh pattern to avoid moire phenomenon, then moire phenomenon is reduced, but visibility is lowered
Solution Approach 1:
The patent controls the pitch values of irregular polygons within a specific range (0.5 to 1.5 times the reference pitch value). This controlled parameter change prevents excessive irregularity that would reduce visibility while still providing enough variation to avoid moire phenomenon.
Solution Approach 2:
The patent applies different pitch values to different regions of the mesh pattern, creating local variations that prevent moire effects. However, these variations are controlled to maintain overall uniformity, ensuring that visibility is not compromised by excessive local irregularity.
3Object-affected harmful factors
If conventional mesh pattern with irregular conductive wires is used, then moire phenomenon is partially avoided, but electromagnetic wave shielding effect is insufficient
Solution Approach 1:
The patent uses a composite structure combining irregular polygonal mesh patterns with specific pitch value distributions. This composite design provides both the irregularity needed to avoid moire phenomenon and the controlled density required for effective electromagnetic wave shielding.
Solution Approach 2:
The patent optimizes the pitch values of the mesh pattern to achieve dual functionality. By controlling the pitch within specific ranges, the pattern provides both moire avoidance through irregularity and electromagnetic wave shielding through appropriate wire density and distribution.
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 by distributing irregular polygons uniformly, enhancing visibility and electromagnetic wave shielding, while maintaining high light transmittance and touch sensitivity.
Implementation Method 1
an electrically conductive mesh pattern that is formed on a film-shaped transparent substrate so as to enable at least one of touch input and electromagnetic wave shielding
Implementation Method 2
A method of recognizing the user's touch by such a touch screen device includes a capacitance type method
Data Source
AI summary
The present inventive concept provides a screen device capable of avoiding the moire phenomenon and including an electrically conductive mesh pattern that is formed on a film-shaped transparent substrate so as to enable at least one of touch input and electromagnetic wave shielding, in which the mesh pattern consists of a plurality of irregular polygons arranged along an upper surface of the transparent substrate, a pitch value of each of the plurality of irregular polygons is included within a preset range, and pitch values of respective neighboring irregular polygons are different from each other.