Composite OLED Wire Structure for Fold-Fracture Resistance
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Solution Overview
Problem
OLED devices face issues with wire fracture during folding, leading to impaired functionality due to stress concentration and reduced bending life, which existing methods like drilling holes for fixation fail to adequately address.
Innovation Solution
The wire is divided into three parts, with single wires at both ends and a composite wire in the middle, enhancing ductility by distributing stress evenly and providing backup pathways in case of fractures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the wire is made as a single continuous structure, then electrical connectivity is maintained, but the wire becomes prone to fracture during folding due to stress concentration
Solution Approach 1:
The wire is divided into multiple sub-wires within the bending region, creating a segmented structure that distributes mechanical stress across multiple independent conductive paths. This segmentation prevents stress concentration at single points, allowing the wire to withstand repeated folding without fracture while maintaining electrical connectivity through parallel sub-paths.
2Reliability
If the wire width is increased to improve electrical conductivity, then current carrying capacity increases, but ductility decreases making the wire more susceptible to cracking during bending
Solution Approach 1:
The wire structure is segmented into multiple thinner sub-wires within the bending region instead of using a single wide conductor. This segmentation maintains adequate electrical conductivity through parallel conductive paths while significantly improving ductility, as thinner individual sub-wires can bend more easily without cracking.
Solution Approach 2:
The wire design incorporates thin-film sub-wires in the bending region that provide flexibility and adaptability during folding operations. These thin-film structures maintain electrical functionality while being inherently more ductile and resistant to fracture during repeated bending cycles.
Data Source
Figure 1~2
Figure 3~4
AI summary
A wire and a method of manufacturing the same are provided. The wire for use in an organic light emitting diode device comprises three parts, a first part (11) and a third part (13) are located at both ends of the wire respectively and each of the first part (11) and the third part (13) is a single wire, a second part (12) is located between the first part (11) and the third part (13), and the second part (12) is a composite wire , wherein the composite wire comprises at least two wires. By dividing a middle part of one wire into multiple wires, the purpose of changing a wire width of a single wire is achieved, ductility of the wire can be enhanced, thereby avoiding the occurrence of the problem that the device cannot normally work caused by wire fracture during folding, and improving the using efficiency of the device.