Touch Control Electrode Layout to Reduce Display Panel Visualization
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Solution Overview
Problem
The overlapping of touch driving and sensing electrodes in display panels leads to electrode visualization phenomena, causing issues like 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 sub-electrodes with V-shaped fold line portions that overlap with first electrodes, dispersing the overlapping regions to reduce electrode visibility and enhance optical performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If touch driving and sensing electrodes are arranged in overlapping regions to implement touch function, then touch control capability is improved, but electrode visualization phenomena occur causing display quality degradation
Solution Approach 1:
The connecting electrode is divided into multiple connecting sub-electrodes arranged in different layers. The first connecting sub-electrode is in the same layer as the second touch control sub-electrode, while the second connecting sub-electrode is in a different layer. This segmentation disperses the overlapping regions across multiple layers, reducing the concentration of electrode patterns in any single view and thereby minimizing electrode visualization phenomena while maintaining touch control functionality.
Solution Approach 2:
The patent introduces a multi-layer dimensional structure for the connecting electrodes. By placing connecting sub-electrodes in different layers (different conductive layers relative to the base substrate), the electrode structure transitions from a two-dimensional planar arrangement to a three-dimensional stacked arrangement. This dimensional change allows the overlapping regions to be distributed across multiple layers, reducing their visual impact in any single layer while preserving the electrical connection function.
2Device complexity
If connecting electrodes are placed in the same layer as touch control sub-electrodes to simplify structure, then manufacturing complexity is reduced, but electrode visualization and display quality are degraded
Solution Approach 1:
The patent implements a nested multi-layer structure where connecting sub-electrodes are embedded in different conductive layers. The first connecting sub-electrode is nested in the same layer as the second touch control sub-electrode, while the second connecting sub-electrode is nested in a different layer. This nested multi-layer arrangement distributes the electrode patterns across multiple levels, reducing their visual concentration in any single layer and thereby minimizing electrode visualization phenomena.
Solution Approach 2:
The patent transitions from a single-layer to a multi-layer structure for organizing connecting electrodes. By distributing connecting sub-electrodes across different conductive layers, the structure utilizes the vertical dimension to separate overlapping regions. This dimensional organization reduces electrode visualization in any single layer while maintaining structural integrity and electrical functionality.
3Reliability
If overlapping regions of electrodes are concentrated to ensure electrical connection, then connection reliability is improved, but visual defects and display quality are worsened
Solution Approach 1:
The connecting electrode is segmented into multiple connecting sub-electrodes positioned in different layers. This segmentation distributes the electrical connection paths across multiple layers, maintaining connection reliability through redundant pathways while dispersing the overlapping regions to reduce their visual concentration and minimize electrode visualization phenomena.
Solution Approach 2:
The patent utilizes vertical layering to distribute connecting sub-electrodes across different conductive layers. This dimensional distribution maintains electrical connection reliability by providing multiple connection pathways while reducing the concentration of overlapping regions in any single layer, thereby minimizing visual defects and electrode visualization phenomena.
Data Source
AI summary
A touch control substrate, a display panel, and an electronic device. 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 the 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.