Touch Screen Sensor Three-Wire Intersection Etching Fractures
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Solution Overview
Problem
Metal grid touch screens face issues with Moire interference and etching fractures at intersection points, leading to poor light transmittance and visual effects, due to the use of metal electrode wires that are prone to fracture and reflective stripes.
Innovation Solution
Implementing a three-wire intersection mode at intersection points, where metal electrode wires extend outward in three directions, reducing the risk of etching fractures and Moire interference, and adjusting wire widths to minimize visual differences and improve light transmittance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If wire widths of metal electrode wires are decreased to improve light transmittance, then light transmittance is improved, but touch performance deteriorates and manufacturing difficulty increases
Solution Approach 1:
The patent changes the geometric parameters of the metal electrode wires by transitioning from traditional four-wire intersections to three-wire intersections. This parameter change allows for optimized wire width and spacing that simultaneously improves light transmittance and maintains touch performance, resolving the contradiction between these two requirements.
Solution Approach 2:
The patent introduces asymmetric design elements in the metal grid structure, particularly in the intersection patterns where three wires meet instead of four. This asymmetric configuration optimizes both optical properties (light transmittance) and electrical properties (touch sensitivity), breaking the trade-off between the two parameters.
2Reliability
If wire widths of metal electrode wires are increased to improve touch performance, then touch performance is improved, but light transmittance deteriorates and Moire interference increases
Solution Approach 1:
The patent optimizes the geometric parameters of the metal electrode wires by implementing three-wire intersection patterns. This parameter optimization enables the wires to be sufficiently wide for good touch performance while maintaining adequate spacing and intersection efficiency to preserve light transmittance and reduce Moire interference.
3Object-affected harmful factors
If metal electrode wires are designed with acute angles and obtuse angles to avoid Moire effect, then Moire interference is reduced, but etching fractures occur at intersection points
Solution Approach 1:
The patent extracts or removes one wire from the traditional four-wire intersection configuration, creating a three-wire intersection. This extraction simplifies the intersection geometry, reducing the number of acute-angle configurations that are prone to etching fractures while still maintaining the asymmetric pattern needed to avoid Moire interference.
Solution Approach 2:
The patent employs asymmetric three-wire intersection patterns that achieve Moire effect mitigation through irregular spacing and angles, while the reduced complexity compared to four-wire intersections minimizes the formation of problematic acute-angle configurations that lead to etching fractures.
4Reliability
If four-wire intersection mode is used to ensure complete electrode coverage, then touch electrode continuity is improved, but etching fractures and visual defects increase
Solution Approach 1:
The patent removes one wire from each four-wire intersection to create a three-wire intersection configuration. This extraction reduces the complexity of the intersection pattern, minimizing acute-angle formations that cause etching fractures, while the remaining three wires maintain sufficient electrode continuity for reliable touch functionality.
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 three-wire intersection mode reduces the risk of etching fractures, alleviates Moire interference, and enhances light transmittance while maintaining touch performance, resulting in an improved visual effect and customized resistance values for each grid cell.
Implementation Method 1
A metal electrode wire pattern is designed on a substrate by means of an etching process
Implementation Method 2
when an etching solution is distributed in a dot shape, under an action of surface tension and with an etching center point as the center of a circle, circular etching areas are radiated by an etching tension
Data Source
AI summary
The present disclosure provides a touch screen sensor and a touch screen with the touch screen sensor. The touch screen sensor includes a plurality of grid cells, wherein the plurality of grid cells are connected to each other to form the touch screen sensor; and each grid cell includes a plurality of metal electrode wires arranged in an intersecting manner, the plurality of grid cells at least form a three-wire intersection mode at part of intersection points, and a plurality of identical grid cells are repeatedly connected or different grid cells are arranged in the intersecting manner to form a touch electrode. In some embodiments of the present disclosure, at least part of the intersection points of a four-wire intersection mode of the grid cells are adjusted and arranged to be intersection points of the three-wire intersection mode.