Curved Conductive Wires in Flexible Display Panels
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Solution Overview
Problem
Flexible display panels face challenges in bending performance due to the aesthetic demands of being bent, which require enhanced stress buffering to prevent breakage and reduce the need for additional flexible printed circuit boards.
Innovation Solution
A flexible display panel design featuring a bent portion with a substrate layer group and a conductive wire group comprising curved conductive wires that cross to form closed regions, providing stress buffering and improved compact arrangement, thereby enhancing bending resistance and reducing the risk of breakage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If the edges of the flexible display panel are bent to improve aesthetics, then the aesthetic appearance is improved, but the bending performance and stress resistance deteriorate
Solution Approach 1:
The conductive wires are designed in curved shapes rather than straight lines, allowing them to flex and bend without breaking. The curved geometry enables the wires to accommodate the bent portion of the display panel while maintaining electrical connectivity, thus improving both aesthetics and bending performance simultaneously.
Solution Approach 2:
The conductive wire group is divided into multiple curved conductive wires that cross each other to form closed regions. This segmentation allows stress to be distributed across multiple wires and regions, preventing any single wire from bearing excessive stress during bending, thereby improving reliability while maintaining the bent aesthetic shape.
2Reliability
If additional flexible printed circuit board is provided to improve bending performance, then the stress resistance is improved, but the area of non-display regions increases
Solution Approach 1:
The conductive wire group is integrated directly into the bent portion of the display panel, merging the electrical connection function with the structural bending region. This eliminates the need for separate flexible printed circuit boards, maintaining stress resistance while reducing the area of non-display regions.
Solution Approach 2:
The conductive wires are arranged in a two-dimensional curved pattern forming closed regions within the bent portion, rather than extending outward in a third dimension as a separate circuit board would. This dimensional integration allows the electrical connections to be embedded within the bent area, reducing overall non-display region area while maintaining bending performance.
3Ease of manufacture
If straight conductive wires are used in the bent portion, then the manufacturing simplicity is improved, but the stress buffering capability and compact arrangement deteriorate
Solution Approach 1:
The conductive wires are designed with curved shapes instead of straight lines. This curvature allows the wires to naturally buffer stress during bending operations and enables more compact arrangement within the bent portion, improving stress buffering capability while remaining manufacturable through standard curved trace fabrication processes.
Solution Approach 2:
The conductive wires are pre-configured in curved shapes and arranged to form closed regions before the bending process occurs. This preliminary configuration ensures that the wires are already optimized for stress distribution and compact arrangement, eliminating the need for post-bending adjustments while maintaining manufacturing simplicity.
Data Source
AI summary
A flexible display panel and a display device are provided. The flexible display panel includes a bent portion. The bent portion includes a substrate layer group and a conductive wire group. The conductive wire group is located on the substrate layer group. The conductive wire group includes a plurality of conductive wires in a curved shape. At least two of the plurality of conductive wires cross and surround at least one closed region. The at least one closed region is provided at least corresponding to a bent region of the bent portion.