Touch Sensor Panel Symmetrical Mesh Pattern for Moire Reduction
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Solution Overview
Problem
Existing touch panels suffer from visibility issues due to the moire phenomenon caused by overlapping patterns in detecting electrodes, which is not effectively addressed by current mesh pattern structures like honeycomb and diamond patterns, leading to reduced transmittance and difficulties in mass production.
Innovation Solution
A touch sensor panel and fabrication method where metal wires are patterned to form symmetrical components correlated with the x and y axes, allowing for the formation of continuous unit meshes with specific angle conditions that prevent moire patterns, enabling improved visibility and flexibility in pattern forms.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If mesh patterns comprising honeycomb patterns and diamond patterns are used to improve visibility, then visibility is improved, but transmittance is reduced due to the overlap of the patterns
Solution Approach 1:
The patent applies asymmetry by introducing a torsion angle between the mesh patterns of detecting electrodes and driving electrodes. Specifically, the detecting electrode mesh pattern is rotated relative to the driving electrode mesh pattern by a predetermined torsion angle, breaking the symmetric overlap and thereby reducing the moiré phenomenon while maintaining visibility and improving transmittance.
2Device complexity
If detecting layers including detecting units are laminated in parallel, then the structure is simple, but a moire phenomenon occurs due to interference between the patterns
Solution Approach 1:
The patent introduces a torsion angle between the mesh patterns of detecting electrodes and driving electrodes to break the symmetric alignment. This asymmetric arrangement prevents the formation of moiré patterns by eliminating the interference between overlapping grid patterns, while the lamination structure remains relatively simple.
Solution Approach 2:
The patent resolves the moiré phenomenon by introducing a dimensional change in the angular orientation of the mesh patterns. By rotating the detecting electrode mesh pattern relative to the driving electrode mesh pattern in the planar dimension, the interference pattern is eliminated without adding structural complexity.
3Illumination intensity
If torsion based on a predetermined angle is applied between the patterns to prevent the occurrence of a moire pattern, then visibility is improved, but the manufacturing process becomes more complex
Solution Approach 1:
The patent applies parameter changes by specifying a predetermined torsion angle (e.g., 45 degrees) between the mesh patterns. This quantitative parameter definition simplifies the manufacturing process by providing a clear, measurable criterion for pattern alignment, making it easier to control and reproduce during fabrication while effectively preventing moiré patterns.
Data Source
AI summary
The present invention provides a touch sensor panel and a fabrication method thereof, in which metal wires for forming a metal mesh are subject to patterning to have symmetrical components being in correlation with each other on the basis of x and y axes, thereby improving visibility. In the touch sensor panel and the fabrication method thereof, the metal wires consist of continuous unit wires in which a unit wire and another unit wire crossing with the unit wire have symmetrical components being in correlation with each other and the size of the symmetrical components is determined based on the line width of the unit wires.