Flexible Cover Window With Pattern Layer Impact Dispersion
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Solution Overview
Problem
Conventional flexible cover windows for displays, whether polymer-based or glass-based, face challenges in maintaining strength and folding properties while preventing image distortion and impact resistance, especially when subjected to repeated folding and pressure.
Innovation Solution
A flexible cover window with a pattern layer for impact dispersion formed on a glass substrate, which disperses impacts and maintains strength and folding properties by reducing effective thickness, using a combination of glass and resin materials with a buffer resin layer and functional coating for enhanced resilience and elasticity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the glass thickness is increased to satisfy strength property, then impact resistance is improved, but folding property deteriorates
Solution Approach 1:
The glass substrate is segmented into multiple regions with different thicknesses through the pattern layer, creating thick regions for strength and thin regions for flexibility. This segmentation allows the cover window to simultaneously achieve high impact resistance in flat areas and good folding properties in folding areas.
Solution Approach 2:
Different regions of the glass substrate are given different local qualities through variable thickness design. The flat portion maintains greater thickness for strength, while the folding portion has reduced thickness for flexibility, allowing each region to optimize its function.
2Ease of operation
If the glass thickness is decreased to satisfy folding property, then folding flexibility is improved, but strength property deteriorates
Solution Approach 1:
The glass substrate is segmented into multiple regions with different thicknesses through the pattern layer, creating thick regions for strength and thin regions for flexibility. This segmentation allows the cover window to simultaneously achieve high impact resistance in flat areas and good folding properties in folding areas.
Solution Approach 2:
Different regions of the glass substrate are given different local qualities through variable thickness design. The flat portion maintains greater thickness for strength, while the folding portion has reduced thickness for flexibility, allowing each region to optimize its function.
3Ease of operation
If polymer film is used for flexibility, then folding property is improved, but impact resistance and transmittance deteriorate
Solution Approach 1:
The invention uses a composite structure combining glass substrate with pattern layer and resin layers. This composite material approach leverages the high strength and optical properties of glass while incorporating flexible resin components to achieve both impact resistance and folding flexibility, overcoming the limitations of pure polymer films.
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 increases impact resistance and maintains the unique texture of tempered glass, improving both folding and strength properties while minimizing screen distortion and resolution reduction, and enhancing durability against pen-drop impacts.
Implementation Method 1
a pattern layer for impact dispersion formed on a glass substrate, which disperses impacts
Implementation Method 2
a buffer resin layer and functional coating for enhanced resilience and elasticity
Data Source
AI summary
The present disclosure provides a flexible cover window comprising at least one flat portion corresponding to flat areas of a flexible display and a folding portion corresponding to a folding area of the flexible display and formed to be connected to the at least one flat portion, wherein the flexible cover window is made from a glass substrate having a pattern layer for impact dispersion thereon, wherein the pattern layer for impact dispersion is formed on the flat portion and the folding portion, and the height of the pattern layer is less than half of the thickness of the glass substrate.