Silver Nanowire Electrode Structure for Stable Flexible Bending
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Solution Overview
Problem
Existing flexible display devices face issues with significant resistance value changes in the bending region, leading to poor touch performance and user experience due to high change rates exceeding 100% in the folding area.
Innovation Solution
An electrode structure with a silver nanowire electrode on a substrate, designed to maintain a resistance value change rate of less than 10% in the bent state, utilizing a bending radius of 2-4 mm, and incorporating a silver nanowire paste with specific sheet resistance and thickness, along with a polymer layer and isolation layer to stabilize the electrode.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a conventional transparent conductive electrode is used in flexible display devices, then the device can be folded or bent, but the resistance value in the bending region changes excessively (exceeding 100% change rate)
Solution Approach 1:
The patent changes the material parameters by replacing conventional transparent conductive electrodes with silver nanowire electrodes having specific diameter (30-100 nm), length (10-100 μm), and aspect ratio (100-5000). The nanowire network structure with controlled nanowire density and distribution maintains electrical conductivity while accommodating bending deformation, reducing resistance change rate to below 10%.
Solution Approach 2:
The patent uses composite material structure combining silver nanowires with polymer substrates and encapsulation layers. The silver nanowire network embedded in flexible polymer matrix creates a composite electrode that combines electrical conductivity, flexibility, and mechanical durability, solving both adaptability and reliability requirements.
2Volume of moving object
If the bending radius is reduced to achieve better flexibility, then the device can be folded more tightly, but the resistance change rate in the bending region increases
Solution Approach 1:
The patent optimizes nanowire physical parameters including diameter (30-100 nm), length (10-100 μm), and aspect ratio (100-5000) to create a network structure that maintains electrical connectivity under small bending radii (2-4 mm). The high aspect ratio and controlled density ensure sufficient conductive pathways remain intact during tight folding.
Solution Approach 2:
The patent creates a dynamic nanowire network structure that can adapt its configuration during bending. The flexible polymer substrate allows nanowires to reposition and maintain conductive pathways dynamically, enabling the electrode to function reliably across varying bending states from flat to tightly folded.
Data Source
AI summary
An electrode structure includes a substrate and a silver nanowire electrode disposed on the substrate. The electrode structure can be changed from an expanded state to a bent state with a bending radius of about 2-4 mm. The electrode structure includes a bending region and a first non-bending region and a second non-bending region respectively adjacent to the bending region in the bent state. The silver nanowire electrode has a change rate of a resistance value between the bent state and the expanded state of less than 10% in an electrode section of the bending region.