Curved Display Touch Bridge Layout for Crack-Resistant Panels
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Solution Overview
Problem
Existing display panels with curved or flexible designs face issues of stress concentration and increased risk of cracks or breakage at bridge regions due to evenly distributed bridges in areas with small curvature radii, leading to low production yield.
Innovation Solution
The display panel design includes bridges in regions with a curvature radius of at least 4.5 mm, strategically positioning them in areas with larger radii to alleviate stress concentration and reduce the risk of cracks, while maintaining equal areas for first and second touch structures to enhance touch sensitivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If bridges are evenly distributed in curved regions with small curvature radii, then the touch structure maintains uniformity, but stress concentration increases and the risk of cracks or breakage increases
Solution Approach 1:
The patent applies local quality by differentiating bridge placement strategies between curved regions and planar regions. In curved regions with small curvature radii, bridges are strategically avoided or reduced to prevent stress concentration, while in planar regions bridges are evenly distributed to maintain touch structure uniformity. This localized adaptation resolves the contradiction between uniformity and reliability.
Solution Approach 2:
The patent changes the parameter of bridge distribution from uniform across the entire display to variable based on curvature radius. By adjusting bridge density and positioning according to local curvature characteristics, the patent optimizes both touch sensitivity uniformity and structural reliability, preventing cracks in high-stress curved areas while maintaining functionality.
2Area of stationary object
If bridges are placed in curved regions, then the touch structure coverage is maximized, but stress concentration occurs leading to low production yield
Solution Approach 1:
The patent implements local quality by adjusting bridge placement based on curvature characteristics. In curved regions, bridges are strategically positioned or reduced to minimize stress concentration, while in planar regions bridges are densely distributed to maximize coverage. This localized strategy maintains overall touch structure coverage while preventing stress-related failures that would reduce production yield.
Solution Approach 2:
The patent segments the display region into curved regions and planar regions, applying different bridge distribution strategies to each segment. This segmentation allows optimization of bridge placement for each region's specific characteristics, maximizing coverage in low-stress areas while minimizing crack risk in high-stress curved areas, thereby improving production yield.
3Area of stationary object
If the curvature radius is reduced for compact design, then the display size is minimized, but the risk of cracks at bridge regions increases
Solution Approach 1:
The patent changes the parameter of bridge distribution based on curvature radius. In regions with small curvature radii (compact curved areas), bridges are strategically avoided or reduced to prevent stress concentration and cracks, while in planar regions bridges are evenly distributed to maintain touch functionality. This parameter-based adaptation allows compact display design while maintaining crack resistance.
Data Source
AI summary
A display panel includes a display substrate, of first touch structures and second touch structures. A first touch structure includes first touch electrodes arranged in at least one column and first connection portions, and first touch electrodes in at least one column are connected through first connection portions. A second touch structure includes second touch electrodes arranged in at least one row and second connection portions, and second touch electrodes in at least one row are connected through second connection portions. An overlapping region where an orthographic projection of a second connection portion on the display substrate partially overlaps with an orthographic projection of a first connection portion on the display substrate is a bridge sub-region. A curvature radius of the display substrate is greater than or equal to 4.5 mm in a bridge sub-region that is in a curved region of the display substrate.