Composite Display Cover With Direct-Bonded Polymer Film for Folding Displays
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Solution Overview
Problem
Existing display technologies for flexible devices, such as folding devices, face challenges in providing thin, durable, and damage-resistant display covers that can accommodate various orientations and configurations.
Innovation Solution
A composite display cover is developed comprising an ultra-thin glass layer with a polymer film applied directly to the glass, a hard coat applied to the polymer film, and attached to a display via an adhesive layer, without an additional adhesive layer between the polymer film and glass, enhancing scratch and abrasion resistance, and incorporating nanoparticles for increased durability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If conventional display protection technologies with additional adhesive layers are used, then the display cover can be assembled, but scratch and abrasion resistance is reduced due to soft adhesive layers being prone to damage
Solution Approach 1:
The patent removes the intermediate adhesive layer between the polymer film and glass layer, eliminating the weak link in the structure. The polymer film is applied directly to the glass layer without adhesive, preventing scratch and abrasion damage that would occur at the adhesive interface.
Solution Approach 2:
The patent creates a composite structure consisting of glass layer, polymer film, and hard coat layer. This multi-material composite provides enhanced scratch and abrasion resistance by combining the properties of each material, with the hard coat providing additional protection against damage.
2Strength
If the display cover structure is made more durable with multiple layers, then damage resistance improves, but the overall thickness increases
Solution Approach 1:
The patent employs an ultra-thin glass layer combined with thin polymer film and hard coat layers. This thin-film composite structure provides enhanced damage resistance while maintaining a sleek, thin profile suitable for modern flexible devices.
Solution Approach 2:
The composite structure combines multiple thin layers (glass, polymer, hard coat) that collectively provide superior damage resistance. Each layer is optimized for its specific function while keeping individual thicknesses minimal, achieving high protection without excessive overall thickness.
3Adaptability or versatility
If a flexible display cover is used to accommodate folding configurations, then adaptability improves, but structural durability may be compromised
Solution Approach 1:
The patent uses a flexible composite structure comprising ultra-thin glass layer, polymer film, and hard coat that can bend and fold without compromising integrity. This flexible design enables the display cover to adapt to various folding configurations while maintaining structural durability through the reinforced composite layers.
Solution Approach 2:
The composite material structure provides both flexibility for folding and durability for protection. The combination of glass, polymer, and hard coat creates a resilient structure that can withstand the mechanical stresses of folding while maintaining its protective function.
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 composite display cover provides improved protection and durability, allowing flexible structures to support various orientations while reducing mechanical stress on the display, thus offering enhanced resistance to damage.
Implementation Method 1
a polymer film applied directly to the glass layer without a separate adhesive
Implementation Method 2
a hard coat applied to the polymer film opposite the glass layer, wherein the hard coat includes a base material impregnated with nanoparticles
Data Source
AI summary
Implementations for composite display cover are described and provide improved protection and durability to device displays as compared with conventional display protection technologies. The described composite display cover, for instance, utilizes an ultra-thin glass layer with a polymer film applied directly to the glass layer and a hard coat applied to the polymer film. The polymer film, for instance, is applied to the glass layer without an adhesive. Further, the composite display cover can be attached to a display, such as via an adhesive layer that adheres the glass layer to a surface of the display.