Self-Repairing Anode Layer for Foldable OLED Display Panels
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Solution Overview
Problem
OLED displays suffer from anode brittleness, leading to cracking and reduced service life when bent or folded multiple times.
Innovation Solution
Incorporating a self-repairing layer on the anode, composed of materials like polydimethylsiloxane-4,4′-methylene phenyl isocyanate-4,4′-hexamethylenebiurea, which repairs mechanical damage and enhances bending performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the anode is made with conventional conductive materials, then electrical conductivity is achieved, but brittleness increases leading to cracking when bent or folded
Solution Approach 1:
The anode is constructed as a composite structure comprising a first conductive body layer, a self-repairing layer, and a second conductive body layer. The self-repairing layer contains polydimethylsiloxane-4,4′-methylene phenyl isocyanate-4,4′-hexamethylenebiurea that can autonomously repair mechanical cracks, while the conductive body layers maintain electrical conductivity. This composite design resolves the contradiction by combining materials with complementary properties to achieve both mechanical strength and reliability.
2Adaptability or versatility
If the OLED display is folded multiple times to enable wearable devices, then flexibility and adaptability are improved, but the anode cracks or breaks due to brittleness
Solution Approach 1:
The self-repairing layer incorporates polydimethylsiloxane-4,4′-methylene phenyl isocyanate-4,4′-hexamethylenebiurea that possesses self-repairing capability. When mechanical cracks occur during repeated folding, the self-repairing material autonomously repairs the damage without external intervention. This self-service mechanism allows the OLED display to maintain reliability and service life even when folded multiple times for wearable applications.
3Reliability
If a self-repairing layer is added to the anode, then reliability and service life are improved, but device complexity increases
Solution Approach 1:
The self-repairing layer is positioned specifically between the first and second conductive body layers of the anode, where mechanical stress and crack propagation are most critical. Rather than making the entire device complex, the self-repairing functionality is localized to the precise region needing protection. This local quality approach improves reliability while minimizing overall device complexity by applying the complex self-repairing material only where necessary.
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 self-repairing layer reduces the probability of anode cracking, improving reliability and extending the service life of OLED displays.
Implementation Method 1
By utilizing a self-repairing performance of the self-repairing layer, a mechanical performance damage of the anode can be repaired
Data Source
AI summary
The present application provides an OLED display panel and a display device. The OLED display panel includes a substrate and an anode disposed on the substrate, wherein the anode includes a first conductive body layer and a self-repairing layer, and the self-repairing layer is located on a side of the first conductive body layer close to the substrate.