Display Panel Trace Segmentation for Bending Stress Reduction
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Solution Overview
Problem
Display panel bending areas with metal traces are prone to stress and breakage under bending stress, leading to reduced product yield due to stress concentration and failure of the bending area.
Innovation Solution
The display panel incorporates a bending area with edge openings and hole arrays, including primary and secondary holes arranged to reduce stress concentration and enhance bendability, forming arc-like structures that distribute stress evenly and prevent trace breakage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If metal traces are used to connect signal traces in the bending area, then electrical connectivity is achieved, but the traces are subject to stress strain and may break under bending stress
Solution Approach 1:
The trace structure is segmented by forming multiple openings (first hole array and second hole array) along the bending direction. These openings divide the continuous trace into multiple segments, allowing each segment to deform independently during bending, thereby reducing stress concentration and preventing trace breakage while maintaining electrical connectivity
Solution Approach 2:
The openings are strategically positioned at specific locations where stress concentration is most likely to occur during bending. The first hole array is positioned at the first end and the second hole array at the second end of the trace, creating local flexibility zones that accommodate bending stress without compromising the overall structural integrity or electrical function
2Adaptability or versatility
If the bending area is made flexible to enable full screen with arrow bezel, then display border is minimized, but stress concentration occurs and reduces product yield
Solution Approach 1:
The trace is divided into multiple segments through openings, enabling the bending area to achieve the required flexibility for full screen display with arrow bezel while distributing bending stress across multiple segments, thereby preventing catastrophic failure and improving product yield
Solution Approach 2:
The openings that create potential weak points in the trace structure are strategically designed to convert the harmful stress concentration into beneficial stress distribution. The openings allow controlled deformation at specific locations, transforming the potential failure points into flexibility zones that enable the desired bending behavior while maintaining overall reliability
Data Source
AI summary
The invention provides a display panel and a display device. The display panel includes a bending area which includes at least one trace, with openings formed on an edge of one side of the trace. A first hole array and a second hole array are located on the trace. The second hole array is located at a configuring side of the first hole array. The configuring side is a side adjacent to the openings. The first hole array includes a plurality of primary holes. The second hole array includes a plurality of secondary holes. The positions of the primary holes correspond to the positions of openings, and the positions of secondary holes corresponds to a connecting position where two adjacent first openings connect. The display panel and display device of the invention can avoid trace breaking and improve product yield.