Flexible OLED Barrier Layer for Moisture Protection
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Solution Overview
Problem
Flexible organic light-emitting display devices are prone to damage and degradation due to penetration of external air and moisture, which affects their performance and durability.
Innovation Solution
Incorporating a barrier layer on the sealing substrate of the organic light-emitting display device, which can be made of inorganic thin films, organic thin films, or composite thin films, to prevent the ingress of air and moisture, thereby enhancing the device's protection and reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If flexible organic light-emitting display devices are used to achieve various shapes and portability, then adaptability and ease of operation are improved, but penetration of external air and moisture increases causing damage and degradation
Solution Approach 1:
The patent applies composite materials by forming a multi-layer barrier structure comprising an inorganic barrier layer (such as aluminum oxide or silicon oxide) and an organic barrier layer (such as polyimide or acrylic). This composite structure combines the advantages of inorganic materials (excellent barrier properties against moisture and oxygen) with organic materials (flexibility and adhesion), thereby achieving both flexibility and reliable protection against air and moisture penetration.
2Reliability
If barrier layers are added to prevent air and moisture penetration, then reliability and durability are improved, but device complexity increases
Solution Approach 1:
The patent employs flexible shells and thin films by using thin-film barrier layers deposited on the sealing substrate. These thin films provide effective barrier protection against air and moisture while maintaining the flexibility and轻薄 characteristics of the display device. The barrier layers are formed as thin coatings rather than thick rigid structures, thus minimizing increase in device complexity and thickness.
3Object-affected harmful factors
If multiple barrier layers are formed on the sealing substrate, then penetration resistance is improved, but manufacturing complexity increases
Solution Approach 1:
The patent applies parameter changes by controlling the thickness, material composition, and layer configuration of the barrier layers to optimize both protection performance and manufacturability. By adjusting parameters such as layer thickness (e.g., tens to hundreds of nanometers) and material properties, the patent achieves effective barrier protection while maintaining compatibility with existing manufacturing processes like sputtering, atomic layer deposition, or spin coating.
Data Source
AI summary
An organic light-emitting display device is provided. The organic light-emitting display device includes a substrate; a display unit on the substrate; and a sealing substrate on the display unit. The sealing substrate includes a first surface facing the display unit and a second surface opposite to the first surface. A first barrier layer is on the first surface or the second surface of the sealing substrate. Thus, the organic light-emitting display device may easily reduce or prevent penetration of external air and moisture.