Flexible Protective Cover with Anti-Scattering Protrusions
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Solution Overview
Problem
Flexible display devices face challenges in achieving high impact resistance and preventing glass fragmentation, which can cause user and device safety issues due to their susceptibility to external impacts and bending requirements.
Innovation Solution
A protective cover with a cover substrate, an anti-scattering coating layer featuring protrusions, and an adhesive layer, where the substrate and coating layer are designed to be flexible with a curvature radius of 10 mm or less, and the protrusions enhance impact resistance and prevent glass scattering by dispersing stress and improving adhesion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the cover substrate is made thinner to improve flexibility, then the flexibility increases, but the impact resistance decreases
Solution Approach 1:
The patent applies composite materials by combining the cover substrate with an anti-scattering coating layer and an adhesive layer featuring protrusions. This multi-layer composite structure enhances impact resistance while maintaining the thinness and flexibility of the cover substrate, resolving the contradiction between thinness and strength.
Solution Approach 2:
The anti-scattering coating layer with protrusions acts as a cushioning layer that absorbs and disperses impact energy before it reaches the cover substrate. This beforehand cushioning prevents glass fragmentation while maintaining substrate thinness for flexibility.
2Strength
If the cover substrate is made thicker to improve impact resistance, then the impact resistance increases, but the flexibility decreases
Solution Approach 1:
Instead of increasing substrate thickness, the patent uses a composite structure with multiple functional layers. The anti-scattering coating layer and adhesive layer with protrusions provide the necessary impact resistance while keeping the cover substrate thin and flexible.
Solution Approach 2:
The patent transitions from a single-dimensional solution (thicker substrate) to a multi-dimensional solution by adding vertical layers with protrusions. This dimensional change allows impact resistance to be achieved through layer interaction rather than increased thickness, preserving flexibility.
3Duration of action of stationary object
If the anti-scattering coating layer is made smoother to improve transmittance, then the transmittance increases, but the adhesion and impact resistance decrease
Solution Approach 1:
The patent applies local quality by creating protrusions only in the adhesive layer rather than making the entire anti-scattering coating layer rough. This localized structural change maintains high transmittance while providing enhanced adhesion and impact resistance at specific contact points.
Solution Approach 2:
The adhesive layer is segmented into multiple protrusions that independently contact the anti-scattering coating layer. This segmentation allows each protrusion to contribute to adhesion and impact resistance while maintaining overall optical transparency of the layer.
Data Source
AI summary
A protective cover includes a cover substrate, an anti-scattering coating layer on the cover substrate, and an adhesive layer on the anti-scattering coating layer, wherein the anti-scattering coating layer has a plurality of protrusions, wherein the cover substrate has a thickness of 10 μm to 150 μm, and wherein the cover substrate and the anti-scattering coating layer are configured to be folded with a curvature radius of 10 mm or less.