Offset Mesh Conductive Member for Touch Panel Visibility
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Solution Overview
Problem
Touch panels with mesh electrodes made of thin metallic wires face issues with visibility due to thickened intersections, which are not adequately addressed by existing solutions, leading to visibility problems and detection sensitivity challenges.
Innovation Solution
A conductive member for a touch panel featuring a transparent insulating substrate with a first and second conductive layer, each with a mesh pattern composed of thin metal wires, where the vertices of the mesh cells are arranged in a straight line with a directional component that intersects, improving visibility and detection sensitivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If mesh intersections are thickened to improve electrical connection, then conductivity is improved, but visibility deteriorates due to visible intersections
Solution Approach 1:
The patent applies asymmetry by offsetting the intersections of the first and second mesh patterns from each other. Instead of aligning intersections symmetrically, the second mesh pattern is shifted so that its intersections do not coincide with those of the first mesh pattern, reducing the visibility of thickened intersection regions while maintaining electrical connectivity.
Solution Approach 2:
The patent introduces a positional offset in the planar dimension between two mesh layers. By displacing the second mesh pattern relative to the first mesh pattern in the XY-plane, the solution transforms the problem from a single-layer intersection visibility issue to a multi-layer spatial arrangement that reduces visual prominence of intersections.
2Measurement precision
If thin metallic wires are used to reduce parasitic capacitance, then detection sensitivity is improved, but visibility deteriorates due to visible wire intersections
Solution Approach 1:
The patent divides the single mesh structure into two separate mesh patterns (first and second meshes) with different intersection positions. This segmentation allows each mesh to use thin metallic wires for low parasitic capacitance while the combined structure reduces visible intersections through offset positioning, thus maintaining both detection sensitivity and visibility.
3Illumination intensity
If offset intersections are provided to reduce visibility, then intersection visibility is reduced, but moire and density unevenness remain visually recognizable
Solution Approach 1:
The patent creates a composite structure by combining two mesh patterns with different intersection positions. This composite mesh structure not only offsets intersections to reduce visibility but also creates a more uniform overall pattern that reduces moire effects and density unevenness, addressing multiple visibility issues simultaneously.
Data Source
AI summary
A conductive member for a touch panel has a transparent insulating substrate and a first conductive layer which is formed on the transparent insulating substrate, in which the first conductive layer has a first mesh pattern which is composed of a plurality of first mesh cells having a closed shape and formed of thin metal wires, the number of directional components in which vertices of the plurality of first mesh cells are arranged in a straight line is 1 or less, and the number of directional components in which vertices of the plurality of first mesh cells are arranged in a straight line represents the number of sets of parallel line segments, each of the line segments passing through four or more vertices of four or more of the plurality of first mesh cells which are continuously arranged in a straight line.