Flexible Display Window With Nano Pattern Recesses
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Solution Overview
Problem
Existing flexible display devices face challenges in achieving both improved optical characteristics and impact resistance while maintaining folding characteristics, leading to limitations in user convenience and device reliability.
Innovation Solution
A window design featuring a base layer with recessed portions and nano pattern layers, including protrusion patterns, which enhance optical characteristics by reducing reflections and provide impact resistance through a combination of soft and hard materials, ensuring both flexibility and durability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a rigid window structure is used to ensure impact resistance, then durability is improved, but folding characteristics deteriorate
Solution Approach 1:
The window is divided into multiple regions: a folding region with reduced thickness and different material composition to enable bending, and non-folding regions with full thickness for protection. This segmentation allows the window to fold at specific locations while maintaining overall structural integrity and impact resistance in protected areas.
Solution Approach 2:
Different regions of the window have different material properties and thicknesses. The folding region uses softer, more flexible materials with reduced thickness to accommodate bending, while non-folding regions use harder, more impact-resistant materials with full thickness. This local differentiation resolves the contradiction between flexibility and durability.
2Adaptability or versatility
If a soft material is used to ensure folding characteristics, then flexibility is improved, but impact resistance deteriorates
Solution Approach 1:
The window structure segments protective functions from folding functions. Soft, flexible materials are confined to the folding region to enable bending, while hard, impact-resistant materials are placed in non-folding regions to provide protection. This spatial separation allows each material to perform its optimal function without compromising the other.
Solution Approach 2:
The window uses composite material structures combining soft flexible layers (for folding) and hard protective layers (for impact resistance). The multi-layer composite design allows the folding region to bend while the protective regions maintain rigidity, resolving the contradiction between flexibility and durability.
3Ease of manufacture
If a flat surface is used to ensure manufacturing simplicity, then ease of manufacture is improved, but optical characteristics deteriorate due to reflections
Solution Approach 1:
The window incorporates curved or spherical surface features (such as rounded edges and curved transitions between regions) that reduce light reflection compared to sharp edges. These curved surfaces scatter reflected light and improve optical characteristics while adding minimal manufacturing complexity, as the curvatures can be achieved through standard forming processes.
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 solution effectively improves optical characteristics by minimizing reflections and enhances impact resistance, thereby increasing the reliability and user convenience of flexible display devices by ensuring both flexibility and durability.
Implementation Method 1
a first nano pattern layer disposed in the at least one first recessed portion, and including first protrusion patterns
Data Source
AI summary
A window includes a base layer including a first non-folding region; a second non-folding region; a folding region disposed between the first non-folding region and the second non-folding region in a first direction; and at least one first recessed portion overlapping the folding region and extending in a second direction intersecting the first direction, a first nano pattern layer disposed in the at least one first recessed portion, and including first protrusion patterns; and a first soft portion disposed on the first nano pattern layer.