Touch Panel Edge Electrode Segmentation for Digital Roulette
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Solution Overview
Problem
Wearable electronic watches lack the ability to realize a digital roulette function similar to traditional mechanical watches, as existing touch screens do not effectively allow users to slide the periphery to perform mechanical roulette functions.
Innovation Solution
A touch panel design featuring a substrate with first and second touch electrodes arranged in intersecting directions, connected by overlapping portions that enhance touch area coverage and signal strength, allowing for improved edge interaction and digital roulette functionality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional touch screen designs are used, then the device structure is simple, but the edge area touch effect is poor and digital roulette function cannot be realized
Solution Approach 1:
The touch electrodes are divided into multiple segments: first touch electrodes extending in a first direction, second touch electrodes extending in a second direction (intersecting the first), first connecting sub-portions connecting adjacent first touch electrodes, and second connecting sub-portions connecting adjacent second touch electrodes. This segmentation allows independent optimization of each segment's function and position, particularly enabling the connecting portions to be strategically placed to enhance edge area touch sensitivity without requiring a complete redesign of the entire electrode system.
Solution Approach 2:
The patent introduces a multi-directional electrode arrangement by adding second touch electrodes extending in a second direction that intersects the first direction of the first touch electrodes. This creates a two-dimensional grid-like structure with connecting portions at intersections, transforming the traditional single-direction or simple multi-directional design into a more complex spatial arrangement that enhances touch detection capability at the edges through three-dimensional spatial distribution of electrode segments and connecting portions.
2Area of stationary object
If touch electrodes are extended to the edge area, then touch area coverage is improved, but touch signal strength at edges remains insufficient
Solution Approach 1:
The patent merges multiple electrode functions at the edge areas by positioning both first touch electrodes and second touch electrodes to extend to the edges, with their respective connecting sub-portions (first and second connecting sub-portions) also extending to the edges. This merging of multiple electrode systems and their connecting portions at the edge areas creates enhanced touch signal strength through the combined effect of multiple electrode segments and their interconnections, while maintaining comprehensive edge coverage.
3Reliability
If connecting portions are added to connect touch electrodes, then electrical insulation between intersecting electrodes is achieved, but manufacturing complexity increases
Solution Approach 1:
The connecting sub-portions (first connecting sub-portions and second connecting sub-portions) serve as intermediary elements that bridge adjacent touch electrodes while maintaining electrical insulation between intersecting electrode systems. These intermediary connecting portions are positioned at specific locations including edge areas and are designed to electrically connect adjacent electrodes in the same directional system while the orthogonal arrangement of first and second touch electrodes with their respective connecting portions naturally provides insulation between the two intersecting electrode systems, simplifying the insulation requirement compared to direct overlapping connections.
Data Source
AI summary
Disclosed are a touch panel and an electronic device, the touch panel is provided with a touch area and a non-touch area surrounding the touch area, a plurality of first touch electrodes and a plurality of second touch electrodes are all located in the touch area, a plurality of connecting portions include a first connecting portion, a second connecting portion, and a third connecting portion sequentially away from the non-touch area in a first direction, and a distance between a center of an orthographic projection of the first connecting portion on a substrate and a center of an orthographic projection of the second connecting portion on the substrate is less than a distance between the center of the orthographic projection of the second connecting portion on the substrate and a center of an orthographic projection of the third connecting portion on the substrate.