Flexible OLED Composite Barrier Blocks Moisture Without Color Shift
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing OLED packaging technologies fail to effectively block water and oxygen, leading to device damage and a short lifespan, and exacerbate visual angle color shift phenomena in top-emitting AMOLED displays.
Innovation Solution
A flexible organic light emitting device structure incorporating a flexible array substrate, an organic light emitting device layer, an aluminum oxide layer, composite water and oxygen barrier layers comprising mica foil and polymer layers, and a polarizing layer with a touch electrode, which provides enhanced water and oxygen barrier properties without aggravating visual angle color shift.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If single-layer/multi-layer SiOx/SiNx film encapsulation is used, then the structure is simple and easy to manufacture, but the water blocking effect is not obvious and device lifespan is only several hundreds of hours
Solution Approach 1:
The patent employs a composite encapsulation structure consisting of multiple layers including SiOx, SiNx, and organic polymer layers. This multi-material composite approach creates synergistic effects where each layer contributes different protective properties, significantly enhancing the overall water and oxygen barrier performance compared to single-material encapsulation.
Solution Approach 2:
The encapsulation layer is divided into multiple discrete sub-layers (SiOx layer, SiNx layer, organic polymer layer) rather than using a single continuous layer. This segmentation allows each sub-layer to perform its specific barrier function optimally, creating a multi-hurdle defense against water and oxygen penetration.
2Reliability
If multi-layer organic/inorganic stacked packaging technology is used, then water and oxygen blocking performance is improved, but visual angle color shift phenomenon is aggravated and optical taste is reduced
Solution Approach 1:
The patent applies different material properties to different layers of the encapsulation structure. The SiOx and SiNx inorganic layers provide superior water and oxygen barrier properties, while the organic polymer layers are selected and configured to have optical properties that minimize color shift and maintain display quality. This local optimization of material properties resolves the contradiction between barrier performance and optical 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 proposed structure effectively blocks water and oxygen, improving device lifespan and preventing visual angle color shift, while maintaining high flexibility and optical performance.
Implementation Method 1
an aluminum oxide layer, formed on a side of the organic light emitting device layer away from the flexible array substrate
Implementation Method 2
at least one composite water and oxygen barrier layer, formed on a side of the aluminum oxide layer away from the organic light emitting device layer and including a mica foil and a polymer layer
Data Source
AI summary
The present disclosure provides a flexible organic light emitting device and a method of manufacturing the same. The flexible organic light emitting device includes: a flexible array substrate; an organic light emitting device layer, formed on a side of the flexible array substrate; an aluminum oxide layer, formed on a side of the organic light emitting device layer away from the flexible array substrate; at least one composite water and oxygen barrier layer, formed on a side of the aluminum oxide layer away from the organic light emitting device layer and including a mica foil and a polymer layer, the mica foil being provided on a side of the polymer layer toward the aluminum oxide layer; and a polarizing layer with a touch electrode, formed on a side of the composite water and oxygen barrier layer away from the aluminum oxide layer.