Touch Sensor Layer Non-Continuous Lines Moire Reduction
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Solution Overview
Problem
The superposition of touch sensor panels and display modules can cause Moire patterns due to differences in line periodicity, leading to visually unappealing alternating brighter and darker regions or bands.
Innovation Solution
A touch sensor layer with non-continuous conducting lines and sensor electrodes is designed, where the first and second non-continuous conducting lines cross over each other at an angle of 0 to 90 degrees, forming touch sensor units with specific edge profiles to reduce Moire effects by aligning with the pixel array and creating connecting and slit areas.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If continuous conducting lines are used in the touch sensor panel, then electrical conductivity is improved, but Moire patterns appear due to superposition with display module lines
Solution Approach 1:
The continuous conducting lines are divided into non-continuous segments. Each conducting line is broken into multiple discrete segments spaced apart from each other, which interrupts the formation of Moire patterns while maintaining electrical connectivity through the segmented structure
Solution Approach 2:
The conducting lines are designed with asymmetric positioning and varying segment lengths. The first and second conducting lines are positioned at different locations with different segment configurations, breaking the symmetry that would otherwise contribute to Moire pattern formation
2Manufacturing precision
If the periodicity of touch sensor lines matches the display module lines, then manufacturing alignment is improved, but Moire patterns are generated due to line superposition
Solution Approach 1:
By segmenting the conducting lines into non-continuous portions, the patent breaks the periodic continuity that causes Moire patterns. The segments are arranged to maintain alignment with display pixels for manufacturing precision while the gaps between segments prevent the formation of interfering periodic patterns
Solution Approach 2:
The patent introduces dimensional variation by positioning conducting line segments at different locations and orientations. The first and second conducting lines are arranged in different dimensions with angular relationships, transforming the problem from a two-dimensional periodic overlay to a multi-dimensional non-periodic structure
Data Source
AI summary
The disclosure provides a touch sensor layer and a display device. The display device includes a display module and a touch sensor layer. The display module includes a substrate. The touch sensor layer is disposed on the substrate and includes a plurality of touch sensor units defined by a plurality of first non-continuous conducting lines and a plurality of second non-continuous conducting lines cross over each other. A sensor electrode is defined by some of the plurality of touch sensor units connected together.