OLED Encapsulation with Anti-Reflection for Flexible Displays
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Summary
Problems
OLED displays face challenges with reflection of ambient light at the metallic anode layer, reducing contrast and readability, and require effective encapsulation to protect against moisture and oxygen, which existing solutions fail to address adequately in terms of thickness, complexity, and production efficiency.
Innovation solutions
An encapsulation structure comprising a linearly polarizing layer, an inorganic layer, and a photo-aligned liquid crystal polymer (LCP) layer, where the LCP layer is aligned by a photo-aligned substance, providing both barrier and anti-reflection properties, and potentially additional inorganic and organic layers for enhanced protection.
TRIZ Analysis
Specific contradictions:
General conflict description:
Principle concept:
If glass encapsulation is used, then barrier properties against oxygen and moisture are improved, but mechanical flexibility and weight are worsened
Why choose this principle:
The patent replaces rigid glass encapsulation with flexible thin film encapsulation consisting of multiple organic and inorganic layers. This thin film structure provides sufficient barrier properties against oxygen and moisture while dramatically reducing weight and enabling mechanical flexibility, allowing the OLED display to be bent or folded without damage.
Principle concept:
If glass encapsulation is used, then barrier properties against oxygen and moisture are improved, but mechanical flexibility and weight are worsened
Why choose this principle:
The encapsulation structure employs a composite barrier stack comprising alternating organic layers (such as PVA, PMMA, or PI) and inorganic layers (such as SiOx, SiNx, or AlOx). This composite structure combines the advantages of both material types: inorganic layers provide excellent barrier properties, while organic layers provide flexibility and stress relief, achieving both protection and flexibility simultaneously.
Application Domain
Data Source
AI summary:
An encapsulation structure comprising a linearly polarizing layer, an inorganic layer, and a photo-aligned liquid crystal polymer (LCP) layer, where the LCP layer is aligned by a photo-aligned substance, providing both barrier and anti-reflection properties, and potentially additional inorganic and organic layers for enhanced protection.
Abstract
The invention relates to encapsulation structures for OLED displays, wherein the structure provides sufficient barrier properties against oxygen and moisture as well as anti-reflection properties. The structure includes a layer comprising a photo-aligned substance which in a synergistic manner controls both barrier and anti-reflection properties.