Tiled Display Conductive Wire Layout for Bend Stress Relief
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Solution Overview
Problem
In large-sized electronic devices, such as public information displays, the bending of conductive wires to minimize gaps between adjoining displays can lead to damage, reducing the reliability and qualification rate of the device.
Innovation Solution
The electronic device incorporates a flexible substrate with a conductive wire that features a metal portion with a plurality of openings and specific extending and joint portions, ensuring a balanced distribution of stress during bending.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If conductive wires are bent to minimize gaps between adjoining displays, then the display quality is improved, but the conductive wires may be damaged
Solution Approach 1:
The conductive wire is divided into multiple segments with extending portions and joint portions. The extending portions can flexibly deform during bending, while the joint portions connect these segments. This segmentation allows the wire to accommodate bending stresses without fracturing, resolving the contradiction between display quality (requiring bending) and wire reliability.
Solution Approach 2:
The patent changes the physical parameters of the conductive wire by introducing openings in the metal portion and designing specific width ratios between extending and joint portions. These parameter changes enable the wire to have controlled flexibility and stress distribution, allowing it to withstand bending while maintaining electrical conductivity and structural integrity.
2Illumination intensity
If conductive wires are bent to minimize gaps between adjoining displays, then the display quality is improved, but the qualification rate is reduced
Solution Approach 1:
By segmenting the conductive wire into multiple portions with specific structural features (extending portions, joint portions, and openings), the design prevents wire fracture during bending. This significantly reduces failure rates and improves the qualification rate while maintaining the ability to minimize display gaps through bending.
Solution Approach 2:
The patent specifies that the width ratio between extending portions and joint portions should be between 0.8 and 1.2. This precise parameter control ensures optimal stress distribution during bending, preventing wire damage and thereby improving the qualification rate while achieving the desired display quality.
3Strength
If the metal portion has a specific width ratio between extending and joint portions, then the stress distribution is improved, but the manufacturing precision requirement increases
Solution Approach 1:
The patent defines a specific parameter range (0.8-1.2) for the width ratio between extending and joint portions. This range is carefully selected to ensure adequate stress distribution while accommodating normal manufacturing tolerances. The relatively wide acceptable range (0.4 difference) balances manufacturing feasibility with mechanical performance.
Solution Approach 2:
The conductive wire comprises a metal portion with openings, creating a composite structure that combines the strength of metal with the flexibility provided by the openings. This composite design inherently distributes stress more evenly, reducing the sensitivity to precise width ratios and making manufacturing more feasible while maintaining strength.
Data Source
AI summary
An electronic device includes a conductive wire having a metal portion with openings. The openings include a first opening and a second opening arranged along a first direction, and the metal portion includes the first to fourth extending portions and the first to fourth joint portions. The first opening is surrounded by the first extending portion, the second extending portion, the first joint portion, and the second joint portion. The second opening is surrounded by the third extending portion, the fourth extending portion, the third joint portion, and the fourth joint portion. Along the first direction, a ratio of a first width sum of widths of the first extending portion, the second extending portion, the third extending portion, and the fourth extending portion to a second width sum of widths of the first joint portion and the third joint portion is in a range from 0.8 to 1.2.