Mesh Touch Electrode Line Width Variation for Inter-Window Reliability
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Solution Overview
Problem
Existing display panel technologies face issues with touch electrode formation in inter-window regions due to uneven surfaces, leading to short circuits and other problems, particularly in regions between window regions where encapsulating layers form unevenly.
Innovation Solution
A display panel design featuring a touch electrode layer with mesh electrodes in both the display and inter-window regions, where the inter-window region has wider gaps and thicker mesh electrode lines to mitigate surface unevenness and prevent short circuits.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If mesh electrodes are formed in the inter-window region with standard line width, then the touch control function is maintained, but line breaks and short circuits occur due to surface unevenness
Solution Approach 1:
The patent applies different line widths to mesh electrodes in different regions: the inter-window region uses a first line width (wider) while the display region uses a second line width (narrower). This local differentiation allows the inter-window region to better withstand surface unevenness and prevent short circuits, while the display region maintains higher touch control accuracy with narrower lines.
2Reliability
If the mesh electrode line width is increased to prevent short circuits, then reliability improves, but touch control accuracy deteriorates
Solution Approach 1:
The patent implements region-specific line width design where the inter-window region uses wider lines for reliability and the display region uses narrower lines for precision touch control. This spatial differentiation resolves the contradiction by optimizing each region for its primary function.
Solution Approach 2:
The touch electrode layer is segmented into at least two regions (inter-window region and display region) with different mesh electrode specifications. This segmentation allows independent optimization of each region's electrode parameters to meet different functional requirements.
3Ease of manufacture
If uniform mesh electrode design is used across all regions, then manufacturing is simplified, but performance deteriorates in inter-window regions with uneven surfaces
Solution Approach 1:
The patent introduces local quality variation through different line widths in different regions, prioritizing reliability in the inter-window region over manufacturing simplicity. The differentiated design addresses the specific challenges of uneven surfaces in the inter-window region.
Data Source
AI summary
A display panel is provided. The display panel includes a first hole in a first window region and a second hole in a second window region. The display panel includes a touch electrode layer including a plurality of first touch electrodes and a plurality of second touch electrodes, which are mesh electrodes including a plurality of first mesh electrode lines in a first region and a plurality of second mesh electrode lines in a second region. First mesh electrode lines have a first line width. Second mesh electrode lines have a second line width. The first line width is greater than the second line width. A boundary between the first region and the second region is defined by an imaginary line through which line widths of the mesh electrode lines transition from the first line width to the second line width.