Flexible OLED Barrier Wall for Bending Area Moisture Protection
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Solution Overview
Problem
Current flexible OLED display panels face issues with water and oxygen intrusion when bending, leading to cracks and reduced lifespan due to inadequate moisture and oxygen blocking capabilities.
Innovation Solution
A flexible OLED display panel design featuring a flexible substrate, a display layer, a first inorganic layer, a barrier wall made of a composite high molecular polymer and water-absorbing nanoparticles, an organic layer, and a second inorganic layer, with the barrier wall positioned in the bending area to prevent moisture and oxygen intrusion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If flexible OLED display panels are bent, then flexibility and adaptability are improved, but cracks occur at bending areas resulting in water and oxygen intrusion
Solution Approach 1:
The patent uses a flexible substrate instead of traditional glass substrates to enable the OLED display panel to be bent without breaking. This flexible substrate maintains the structural integrity during bending operations, allowing the display to achieve flexibility while preventing cracks that would lead to water and oxygen intrusion.
Solution Approach 2:
The patent employs composite material structures including multiple layers such as the flexible substrate, organic light emitting layer, electron transport layer, and cathode. These composite structures are designed to work together to maintain reliability during bending, with each layer contributing to the overall flexibility and protection against environmental factors.
2Shape
If thin-film flexible display substrates are used to ensure bending performance, then flexibility is improved, but cracks occur in bending areas leading to water and oxygen intrusion
Solution Approach 1:
The flexible substrate acts as a thin film structure that enables bending performance while maintaining integrity. This thin film approach allows the display to achieve the desired shape flexibility without developing cracks that would permit harmful factors like water and oxygen to penetrate.
Solution Approach 2:
The patent uses thin-film materials that can be manufactured cost-effectively and provide sufficient protection for the intended application lifecycle. These thin films are designed to prevent water and oxygen intrusion during the service life of the display, offering a cost-effective solution for achieving bending performance.
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 barrier wall effectively blocks water and oxygen in the bending area, extending the lifespan of the flexible OLED display panel and preventing abnormal displays caused by cracks.
Implementation Method 1
a barrier wall disposed on the first inorganic layer and configured to prevent moisture and oxygen intrusion
Implementation Method 2
The barrier wall is made of a composite of high molecular polymer and water-absorbing nanoparticles
Data Source
AI summary
A flexible organic light emitting diode (OLED) display panel includes a flexible substrate, a display layer disposed on the flexible substrate, a first inorganic layer disposed on the display layer, a barrier wall disposed on the first inorganic layer and configured to prevent moisture and oxygen intrusion, an organic layer disposed on the barrier wall and the first inorganic layer, and a second inorganic layer disposed on the organic layer. The flexible OLED display panel is bendable at a preset bending area, and the barrier wall is disposed in the preset bending area and located outside an active area of the flexible OLED display panel.