Touch Control Electrode Layout for Reduced Display Etching Patterns
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The dense overlap of touch driving and sensing electrodes in display panels leads to electrode visualization phenomena, causing spot-shaped, line-shaped, or block-shaped dark-state etching patterns, which degrade the display quality.
Innovation Solution
A touch control substrate design with first and second touch control electrodes arranged in different directions, featuring connecting electrodes with V-shaped fold line portions that overlap minimally, dispersing the electrode arrangement to reduce visual interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If touch driving and sensing electrodes are densely arranged to achieve high-resolution touch control, then touch control precision is improved, but electrode visualization phenomena occur causing dark-state etching patterns that degrade display quality
Solution Approach 1:
The patent applies dimensionality change by transitioning from planar electrode arrangement to three-dimensional folded structures. The connecting electrodes are designed with folded line portions that extend in multiple directions (first direction and second direction perpendicular to each other), creating vertical dimensionality that disperses the electrode overlap from a two-dimensional plane view, thereby reducing visualization while maintaining electrical connectivity.
Solution Approach 2:
The patent segments the connecting electrodes into multiple folded line portions (first fold line portion and second fold line portion) that are distributed at different positions. Each fold line portion connects adjacent sub-electrodes through separate pathways, dividing the connection function into multiple spatial segments that prevent concentration of overlap at single locations.
2Object-affected harmful factors
If connecting electrodes with folded line portions are used to reduce electrode overlap, then visual interference is reduced, but manufacturing complexity increases due to multi-directional folding structures
Solution Approach 1:
The folded line portions serve multiple functions simultaneously: they provide electrical connection between adjacent sub-electrodes, disperse electrode overlap to reduce visualization, and maintain structural integrity across different orientations. The same folded structure achieves both connectivity and visualization reduction without requiring separate components.
Solution Approach 2:
The patent employs asymmetric folding configurations where the first fold line portion and second fold line portion extend in different directions (asymmetric orientation relative to the sub-electrode arrangement). This asymmetric design allows the folded structures to naturally disperse overlap in multiple directions while maintaining the necessary electrical pathways.
Data Source
AI summary
A touch control substrate, a display panel, and an electronic device are provided. The touch control substrate includes a base substrate and first and second touch control electrodes; each second touch control electrode includes second touch control sub-electrodes and second connecting electrodes; the second touch control sub-electrodes are arranged in the first direction, and the second connecting electrode is located between two adjacent second touch control sub-electrodes; the second touch control sub-electrodes and the second connecting electrodes are located on different conductive layers; the second connecting electrode includes connecting sub-electrodes; two ends of the connecting sub-electrode are connected to two adjacent second touch control sub-electrodes; and the connecting sub-electrode includes first and second fold line portions, the fold lines of which are approximately V-shaped, and openings of fold line shapes of the first and second fold line portions are arranged opposite each other in the second direction.