Flexible OLED Encapsulation with Anti-Reflection Properties
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Summary
Problems
Current encapsulation structures for OLED displays are cumbersome, fragile, and lack mechanical flexibility due to glass encapsulation, and existing thin film encapsulation methods require complex manufacturing processes and additional layers to achieve both barrier and anti-reflection properties.
Innovation solutions
A thin film encapsulation structure comprising a linearly polarizing layer, an inorganic layer, and a liquid crystal polymer (LCP) layer, where the LCP layer is photo-aligned by a photo-aligned substance, providing both barrier and anti-reflection properties without the need for additional complex layers or processes.
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:
A thin film encapsulation structure comprising a linearly polarizing layer, an inorganic layer, and a liquid crystal polymer (LCP) layer, where the LCP layer is photo-aligned by a photo-aligned substance, providing both barrier and anti-reflection properties without the need for additional complex layers or processes.
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.