Mesh Electrode Disconnection Regions for Touch Display Visibility
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Solution Overview
Problem
Capacitive touch display panels with grid-like metal touch electrodes suffer from visibility issues due to breakaway regions, which affect the visual quality and display performance.
Innovation Solution
The implementation of a touch display panel design featuring mesh electrodes with intersecting extending portions and disconnection regions, where the disconnection regions overlap the second extending portions but not the first, reducing visibility and improving display quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If a grid-like metal touch electrode layer is used to increase transmission speed and sensing frequency, then the touch response speed is improved, but breakaway regions appear between touch electrodes which are easily detected by human eyes and cause visual effect problems
Solution Approach 1:
The patent transitions from a traditional grid-like metal electrode structure to a mesh electrode structure where conductive portions and insulating portions are interleaved in a dimensional pattern. This dimensional arrangement allows the breakaway regions to be positioned in intervals between adjacent extending portions, making them less visible to human eyes while maintaining the high transmission speed and sensing frequency of metal electrodes.
Solution Approach 2:
The patent applies different properties to different parts of the electrode structure: conductive portions are arranged to provide electrical connectivity and sensing functionality, while insulating portions are strategically placed at breakaway regions to reduce visibility. This local differentiation allows the structure to simultaneously achieve high transmission speed through conductive areas and reduced visual impact through insulating areas.
2Reliability
If the touch electrode layer is cut into a plurality of touch electrodes to improve touch sensing capability, then the touch functionality is enhanced, but breakaway regions are created that affect display quality
Solution Approach 1:
The patent segments the electrode structure into alternating conductive portions and insulating portions, creating a mesh pattern where breakaway regions are intentionally positioned in the insulating portions. This segmentation allows the electrode to maintain touch sensing capability through the conductive portions while hiding breakaway regions in the insulating portions from human visual detection.
Solution Approach 2:
The patent converts the harmful effect of breakaway regions (which are inevitable when cutting electrodes) into a beneficial arrangement by positioning them in intervals between adjacent extending portions. The insulating portions serve dual purposes: electrically isolating adjacent conductive regions and visually masking the breakaway regions, thereby transforming a defect into a design feature that maintains both touch functionality and display quality.
Data Source
AI summary
The disclosure provides a touch display panel including a substrate and a first mesh electrode. The first mesh electrode is disposed on the substrate and includes a plurality of first extending portions, a plurality of second extending portions, and a plurality of first disconnection regions. The first extending portions are arranged along a first direction and extend in a second direction. The first direction intersects with the second direction. The second extending portions are arranged along the second direction and extend in the first direction. The first disconnection regions are arranged along the first direction and extend in the second direction. The first disconnection regions overlap the second extending portions and do not overlap the first extending portions.