Flexible Display Conductive Structure With Stress-Releasing Layer
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Solution Overview
Problem
Flexible OLED displays suffer from increased wire resistance and broken conductive structures due to frequent bending, leading to degraded display quality.
Innovation Solution
A display panel design incorporating a stress releasing layer with a Young's modulus lower than the conductive structure, where the orthographic projection of the conductive structure overlaps the stress releasing layer, dispersing stress and preventing fractures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the display panel is made flexible to enable bending, then adaptability and versatility are improved, but the conductive structure becomes prone to fracture and wire resistance increases
Solution Approach 1:
The patent employs flexible thin film structures for the conductive layers and introduces a stress-releasing layer to accommodate bending deformations. The conductive structure uses multiple thin conductive layers (first conductive layer, second conductive layer) that can flex without fracturing, while the stress-releasing layer absorbs mechanical stress during bending operations.
Solution Approach 2:
The patent creates a composite structure by combining the conductive structure with a stress-releasing layer having different mechanical properties. The stress-releasing layer is positioned between the conductive structure and the substrate, forming a composite system where each layer contributes its specific properties: the conductive layers provide electrical functionality while the stress-releasing layer provides mechanical compliance during bending.
2Strength
If the conductive structure is made more rigid to prevent fracture, then strength is improved, but the ability to withstand bending stress is reduced
Solution Approach 1:
The patent segments the conductive structure into multiple conductive layers (first conductive layer, second conductive layer) separated by a stress-releasing layer. This segmentation allows each layer to be thinner and more flexible individually, while collectively providing the necessary electrical conductivity and mechanical flexibility for bending applications.
Solution Approach 2:
The stress-releasing layer acts as an intermediary between the conductive structure and the substrate. It mediates the mechanical stress during bending, absorbing and distributing forces to protect the conductive layers from fracture while allowing the overall structure to maintain its electrical functionality.
3Adaptability or versatility
If frequent bending occurs, then adaptability is improved, but wire resistance increases and fractures occur
Solution Approach 1:
The patent uses flexible thin film conductive structures that can undergo repeated bending cycles without significant degradation. The thin film nature allows the conductive layers to flex elastically, maintaining electrical connectivity even after frequent bending operations.
Solution Approach 2:
The stress-releasing layer serves as a mediator that protects the conductive structure from mechanical damage during frequent bending. It absorbs and distributes the mechanical stresses, preventing wire resistance increases and fractures that would otherwise occur with repeated bending cycles.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The design effectively reduces the risk of conductive structure fractures by distributing stress across the stress releasing layer, maintaining display quality and extending the lifespan of flexible OLED displays.
Implementation Method 1
a first stress releasing layer disposed on the substrate and corresponding to the bending region
Data Source
AI summary
Provided is a display panel having a bending region, the display panel including a substrate, a stress releasing layer, and a conductive structure. A first stress releasing layer is disposed on the substrate, and corresponding to the bending region. The conductive structure is disposed on the substrate, and a Young's modulus of the conductive structure is greater than a Young's modulus of the first stress releasing layer.