Flexible Display Window with High and Low Refractive Layers
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Solution Overview
Problem
Flexible display devices require a window that maintains optical properties and mechanical durability while allowing for folding or bending without compromising the display quality and durability.
Innovation Solution
A window structure comprising a base layer, a high refractive layer with inorganic particles and a base resin, and a low refractive layer made of fluorine-containing silsesquioxane-based resin, which includes a perfluoroalkyl group and is designed to provide enhanced optical properties and mechanical durability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional window structure is used, then the manufacturing process is simple, but the optical properties and mechanical durability are insufficient
Solution Approach 1:
The patent employs a multi-layer composite structure consisting of a base layer, high refractive index layer, and low refractive index layer. Each layer is composed of specific materials with distinct properties: the base layer provides structural support, the high refractive index layer contains inorganic particles for enhanced optical properties and durability, and the low refractive index layer reduces reflectance. This composite approach resolves the contradiction by achieving superior mechanical durability and optical properties through material composition rather than simplifying the overall structure.
Solution Approach 2:
The patent applies local quality by assigning different functional properties to different layers of the window structure. The base layer provides mechanical strength, the high refractive index layer (with refractive index 1.55-1.65) provides optical enhancement and durability, and the low refractive index layer (with refractive index 1.40-1.45) provides anti-reflective properties. This differentiation of local qualities allows each layer to optimize its specific function while contributing to overall reliability without requiring the entire structure to be complex.
2Reliability
If the window structure is optimized for optical properties, then display quality improves, but mechanical durability may be compromised
Solution Approach 1:
The patent uses composite materials to simultaneously achieve optimal optical properties and mechanical durability. The high refractive index layer contains inorganic particles dispersed in a resin matrix, creating a composite that provides both enhanced optical properties (refractive index 1.55-1.65) and mechanical strength. The low refractive index layer uses fluorine-containing silsesquioxane-based resin that provides both anti-reflective properties (refractive index 1.40-1.45) and structural integrity. This composite approach resolves the contradiction by integrating multiple material properties within each layer.
Solution Approach 2:
The patent resolves the contradiction between optical properties and mechanical durability by applying local quality principles to each layer. The base layer is optimized for mechanical strength, the high refractive index layer is optimized for optical enhancement while maintaining structural integrity through its composite composition, and the low refractive index layer is optimized for anti-reflective properties while contributing to overall durability. Each layer's local optimization ensures that optical performance enhancement does not compromise mechanical durability.
3Reliability
If a single-layer window is used, then the structure is simple, but both optical properties and mechanical durability are limited
Solution Approach 1:
The patent applies segmentation by dividing the window into three distinct functional layers: a base layer for structural support, a high refractive index layer for optical enhancement, and a low refractive index layer for anti-reflective properties. This segmentation allows each layer to be optimized for its specific function while working together as an integrated system. The clear functional division achieves superior optical properties without requiring excessive structural complexity.
Solution Approach 2:
The patent achieves multi-functionality within a compact three-layer structure. The base layer serves both structural and bonding functions, the high refractive index layer provides both optical enhancement and mechanical durability through its composite composition, and the low refractive index layer provides anti-reflective properties while contributing to overall structural integrity. This multi-functional design resolves the contradiction by achieving diverse functions (structural support, optical enhancement, anti-reflection) within a relatively simple three-layer configuration rather than requiring numerous separate components.
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 window achieves increased optical clarity, reduced reflectance, and improved mechanical durability, ensuring the display device's reliability and performance during folding or bending operations.
Implementation Method 1
a high refractive layer disposed on the base layer and comprising inorganic particles and a base resin
Implementation Method 2
a low refractive layer disposed on the high refractive layer and comprising a fluorine-containing silsesquoxane-based resin
Data Source
AI summary
A window includes a base layer, a high refractive layer disposed on the base layer, and a low refractive layer disposed on the high refractive layer. The high refractive layer includes inorganic particles and a base resin, and the low refractive layer includes a fluorine-containing silsesquioxane-based resin.