Thin Conductive Wire Detection Electrodes for Moire Reduction
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Solution Overview
Problem
Existing touch detection devices using metal conductive materials for electrodes face issues with moire visibility due to interference with display device pixels and light diffraction, leading to unsatisfactory detection precision and aesthetics.
Innovation Solution
A detection device with a substrate and detection electrodes formed by thin conductive wires of constant intersection angles and varying distances, reducing moire visibility by diffraction control and enhancing detection precision through controlled light scattering.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a conductive material such as a metal material is used for detection electrodes to achieve low resistance, then detection precision is improved, but moire is visually recognized due to interference between pixels of a display device and the conductive material
Solution Approach 1:
The detection electrode is designed with an asymmetric structure where one portion extends in a first direction and another portion extends in a second direction intersecting the first direction at a predetermined angle. This asymmetric configuration disrupts the periodic interference pattern that causes moire, while maintaining the conductive material's low resistance property for precise detection.
Solution Approach 2:
The detection electrode has different structural characteristics in different regions: one portion extends in a first direction with different properties than another portion extending in a second direction. This local variation in structure allows the electrode to maintain low resistance overall while creating non-uniform light scattering patterns that reduce moire visibility in specific areas.
2Measurement precision
If detection electrodes are made with conductive material to reduce resistance, then detection precision is improved, but light intensity patterns with diffracted or scattered light become visually recognizable
Solution Approach 1:
The asymmetric design of the detection electrode with portions extending in different directions at predetermined angles creates non-uniform light scattering. This prevents the formation of regular light intensity patterns that would be visually recognizable, while the conductive material maintains low resistance for accurate detection.
Solution Approach 2:
Different portions of the detection electrode have different structural orientations, causing light to be scattered in different directions locally. This local variation in light scattering properties prevents the formation of uniform visible light intensity patterns across the display, while maintaining overall detection precision.
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 minimizes moire visibility and enhances detection precision by controlling light scattering patterns, improving the visibility and functionality of touch detection devices.
Implementation Method 1
a detection device capable of detecting an external proximity object based on a change in capacitance
Implementation Method 2
a light intensity pattern, in which light is diffracted or scattered by a plurality of detection electrodes
Implementation Method 3
a light intensity pattern, in which light is diffracted or scattered by a plurality of detection electrodes
Data Source
AI summary
A detection device capable of detecting an external proximity object is provided. The detection device includes a substrate; and a plurality of thin conductive wires including: a plurality of first thin conductive wires each including a plurality of first thin wire pieces; and a plurality of second thin conductive wires each including a plurality of second thin wire pieces, the first thin wire pieces and the second thin wire pieces being made of a metal material and each including a first end portion and a second end portion.