Siloxane-Epoxy Hard Coating for Flexible Window Durability
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Flexible display devices require a window that offers excellent abrasion resistance, chemical resistance, and optical quality while maintaining durability and mechanical properties to protect the display panel during folding and bending operations.
Innovation Solution
A window comprising a protective film member with a base film, a lower antistatic layer, an optical layer with a lower refractive index, an upper antistatic layer, an anti-fingerprint layer, and a hard coating layer made of a siloxane-epoxy-based compound, which includes a glass substrate and additional layers for enhanced protection and optical properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a flexible window structure is used to enable folding and bending operations, then adaptability is improved, but mechanical strength deteriorates
Solution Approach 1:
The window employs a composite structure consisting of a flexible substrate layer combined with multiple functional layers including a siloxane-epoxy-based hard coating layer. This composite material system provides both the flexibility needed for folding/bending operations and the mechanical strength required for durability, resolving the contradiction between adaptability and strength.
2Reliability
If a hard coating layer is applied to improve abrasion resistance, then durability is improved, but flexibility deteriorates
Solution Approach 1:
The patent utilizes siloxane-epoxy-based compounds with specifically controlled molecular weight and crosslinking density to achieve the desired balance. By adjusting the parameters of the hard coating material (molecular weight, crosslinking agent ratio, coating thickness), the coating provides sufficient abrasion resistance while maintaining the underlying flexibility of the window structure.
3Reliability
If multiple functional layers are added to enhance optical quality and durability, then reliability is improved, but device complexity increases
Solution Approach 1:
The siloxane-epoxy-based hard coating layer serves multiple functions simultaneously: it provides abrasion resistance, chemical resistance, antistatic properties, and optical quality enhancement. By consolidating multiple protective functions into a single integrated layer rather than using separate layers for each function, the patent reduces overall structural complexity while maintaining comprehensive protection and high reliability.
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 window provides superior abrasion resistance, chemical resistance, and optical quality, ensuring the durability and display quality of flexible display devices even when folded or bent, with reduced reflectance and excellent antistatic performance.
Implementation Method 1
an optical layer disposed between the base film and the lower antistatic layer and having a lower refractive index than a refractive index of the base film
Implementation Method 2
a hard coating layer disposed between the base film and the anti-fingerprint layer and consisting of a siloxane-epoxy-based compound
Implementation Method 3
a lower antistatic layer disposed below the base film, an upper antistatic layer disposed above the base film
Data Source
AI summary
A window includes at least one protective film member including a base film, a lower antistatic layer disposed below the base film, an optical layer disposed between the base film and the lower antistatic layer and having a lower refractive index than a refractive index of the base film, an upper antistatic layer disposed above the base film, an anti-fingerprint layer disposed above the base film, and a hard coating layer disposed between the base film and the anti-fingerprint layer and consisting of a siloxane-epoxy-based compound, thereby exhibiting both excellent mechanical properties and excellent optical properties.