Flexible Display Panel Support Structure for Wiring Stress Relief
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Solution Overview
Problem
Existing display panels face issues with cracks and breakages in the wiring during the bonding process, particularly when the bottom of the display panel is curved, due to non-uniform stress distribution and inadequate support in the bending area.
Innovation Solution
A display panel design featuring a flexible display panel main body with a support layer that includes a plane support part and an end part with a transition surface, where the transition surface is curved, allowing smoother bending transitions and reducing stress concentration in the wiring areas.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of moving object
If the bottom of the display panel is curved to achieve full-screen display, then the bonding area can be bent to the back of the display panel, but cracks and breakages occur in the wiring during the bonding process
Solution Approach 1:
The support layer is designed with a curved transition surface that matches the curvature of the bending area. This curved structure provides continuous support along the bending path, preventing sudden stress changes that cause wiring cracks. The transition surface smoothly connects the plane support part to the bonding area, maintaining structural integrity during the bonding process.
Solution Approach 2:
The support layer has different structural characteristics in different regions: the plane support part provides flat support for the plane area, while the end part with curved transition surface provides specialized support for the bending area. This local differentiation ensures that each region receives the appropriate support type needed for its specific function, preventing wiring damage in the bending area while maintaining display quality in the plane area.
2Area of moving object
If the bonding process is performed on a curved bottom surface, then full-screen display can be achieved, but non-uniform stress distribution causes tearing between film layers
Solution Approach 1:
The curved transition surface of the support layer is designed to match the curvature of the bending area, creating uniform stress distribution across the bonded surfaces. This geometric matching ensures that the bonding process occurs under controlled, uniform stress conditions, preventing tearing between film layers while achieving the desired curved display configuration.
Solution Approach 2:
The support layer is pre-configured with the appropriate curvature and structural properties before the bonding process. This preliminary structural preparation cushions and distributes the stresses that will occur during bonding, preventing sudden stress concentration and film layer tearing. The support layer acts as a pre-engineered stress management system.
3Manufacturing precision
If the bending area is tightly constrained during bonding, then bonding precision can be improved, but excessive bending stress causes wiring breakages
Solution Approach 1:
The support layer provides localized support specifically in the bending area through the curved transition surface. This localized support structure allows for precise bonding control in the critical bending region while distributing stresses away from the wiring paths. The plane support part maintains precision for the plane area, while the end part protects the wiring during bonding.
Solution Approach 2:
The support layer acts as an intermediary structure between the bonding process and the wiring. It mediates the stresses generated during bonding, absorbing and distributing them in a controlled manner that protects the wiring from direct stress concentration. The curved transition surface serves as a stress-transfer medium that maintains bonding precision while preventing wiring damage.
Data Source
AI summary
The present application provides a display panel and a display device, and the display panel comprises a flexible display panel main body and a support layer. The support layer comprises a support part and a end part. The flexible display panel main body is configured to surround the transition surface of the end part and is arranged on the second surface of the plane support part, to reduce the stress during the bending process of the flexible display panel main body to avoid the concentration of wiring stress, thereby reducing the risks of breakages in the wirings inside the display panel.