Foldable Display Window with Recessed Cover and Protruding Adhesive
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Solution Overview
Problem
Current foldable display devices face challenges in achieving both high impact resistance and flexibility, particularly in their windows, which need to protect the display module from external scratches while allowing easy folding and unfolding.
Innovation Solution
The window design incorporates a first cover layer with recessed portions and a second cover layer with protrusions, providing even force distribution and enhanced flexibility, along with a third cover layer for additional mechanical strength, ensuring stability and ease of folding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a thick and rigid window structure is used, then impact resistance is improved, but flexibility and ease of folding are worsened
Solution Approach 1:
The window is divided into multiple layers (first cover layer, second cover layer, third cover layer) with different thicknesses and properties. The first cover layer has greater thickness for impact resistance, while the second and third cover layers have lesser thickness to enable flexibility and easy folding, resolving the contradiction between strength and adaptability.
Solution Approach 2:
Different regions of the window have different thicknesses and material properties. The first cover layer has greater thickness in specific areas to provide localized impact resistance where needed, while other regions maintain lesser thickness to preserve overall flexibility and folding capability.
2Strength
If a thick and rigid window structure is used, then mechanical strength is improved, but ease of folding is worsened
Solution Approach 1:
The window structure is segmented into multiple layers with differentiated thicknesses. The first cover layer provides mechanical strength with greater thickness, while the second and third cover layers facilitate ease of folding with lesser thickness, allowing the window to be both strong and easy to fold.
Solution Approach 2:
The window uses a composite structure combining multiple cover layers with different material properties and thicknesses. This composite design integrates the mechanical strength of thicker regions with the flexibility of thinner regions, enabling both protection and ease of folding.
3Reliability
If protective layers are added to enhance impact resistance, then reliability is improved, but device complexity is worsened
Solution Approach 1:
The protective window is segmented into three distinct cover layers, each serving specific protective functions. This segmentation improves reliability by distributing protection across multiple layers while maintaining manageable structural complexity through clear functional differentiation.
Solution Approach 2:
The window employs a composite structure of three cover layers with different thicknesses and properties, enhancing overall protection capability and reliability while organizing the complexity into a structured, multi-layered design that is manageable in manufacturing and assembly.
Data Source
AI summary
A window includes a first cover layer, a second cover layer, and a first adhesive part. The first cover layer includes a first non-folding area, a folding area, and a second non-folding area that are arranged in a first direction, and a plurality of first recessed portions recessed from a top surface of the folding area and extended in a second direction intersecting the first direction. The second cover layer is disposed on the first cover layer. The first adhesive part is disposed between the first cover layer and the second cover layer, and includes protrusions disposed in the plurality of first recessed portions of the first cover layer.