Touch Substrate Arc-Edge Short-Circuit Prevention
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Solution Overview
Problem
Touch substrates with arc-shaped edges face a high risk of short-circuiting due to the close proximity of connection and bridge parts to the edge, leading to reduced yield, as the dimensions and shapes of electrode blocks near the arc-shaped edge are limited, causing these parts to be too close to the substrate's edge.
Innovation Solution
The touch substrate design includes touch elements with connection and bridge parts positioned further away from the arc-shaped edge, with the cross point of these parts located at a center position, ensuring a safe distance and balanced areas of electrode blocks, thereby reducing the risk of short-circuiting and maintaining touch sensitivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If the touch substrate has an arc-shaped edge, then the aesthetic appearance and compact design are improved, but the connection part and bridge part become too close to the edge, increasing short-circuit risk
Solution Approach 1:
The patent applies different design strategies to different regions of the touch substrate. For touch elements near the arc-shaped edge, the connection part and bridge part are positioned away from the edge with adjusted dimensions. For touch elements away from the edge, the cross point is positioned at the center. This local differentiation resolves the contradiction by maintaining aesthetic appearance while preventing short-circuits in critical areas.
Solution Approach 2:
The patent segments the touch substrate into two regions: first touch elements close to the arc-shaped edge and second touch elements far from the edge. Each region has different positioning requirements for the connection part and bridge part. This segmentation allows the design to satisfy both aesthetic requirements (arc-shaped edge) and reliability requirements (short-circuit prevention) simultaneously.
2Area of stationary object
If the connection part and bridge part are positioned close to the arc-shaped edge, then the touch element dimensions are reduced, but the areas of electrode blocks become unbalanced and short-circuit risk increases
Solution Approach 1:
The patent implements local quality by positioning the connection part and bridge part away from the arc-shaped edge specifically in first touch elements where the edge curvature affects electrode block areas. This ensures balanced electrode block areas and prevents short-circuits in regions where they are needed, while allowing compact design in regions where the edge does not interfere.
Solution Approach 2:
The patent performs preliminary positioning of the connection part and bridge part during the design phase, placing them away from the arc-shaped edge before considering other factors. This preliminary action prevents short-circuit risks and ensures balanced electrode block areas, allowing subsequent optimization of touch element dimensions without compromising reliability.
3Device complexity
If the cross point is positioned at the center of each touch element, then the design is simplified, but the connection part and bridge part are too close to the arc-shaped edge in first touch elements
Solution Approach 1:
The patent applies local quality by differentiating the positioning strategy based on location: second touch elements away from the edge use center positioning for simplicity, while first touch elements near the arc-shaped edge use edge-distance positioning for reliability. This localized approach maintains design simplicity where possible while preventing short-circuits where necessary.
Solution Approach 2:
The patent segments touch elements into two categories with different positioning rules. Second touch elements (away from edge) follow the simple center-positioning rule, while first touch elements (near edge) follow the modified rule of positioning away from the edge. This segmentation resolves the contradiction between design simplicity and short-circuit prevention.
Data Source
AI summary
There are provided a touch substrate and a display device, the touch substrate includes touch elements arranged in rows and columns, each of the touch elements includes first electrode blocks coupled together by a connection part and second electrode blocks coupled together by a bridge part, the bridge part crosses the connection part, and an insulation layer is provided between the connection part and the bridge part, the touch elements include a first touch element close to an arc-shaped edge of the touch substrate and a second touch element far away from the arc-shaped edge of the touch substrate, a cross point of the connection part and the bridge part in the first touch element is far away from the arc-shaped edge, and a cross point of the connection part and the bridge part in the second element is at a center position of the second touch element.