Anti-reflective Film with Fluorine Composite Low-refraction Layer
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current anti-reflective films for display devices face challenges in achieving low reflectance, high light transmittance, high scratch resistance, and excellent mechanical properties, particularly due to weak interlayer adhesion in multi-layered structures, which compromises scratch resistance and anti-pollution properties.
Innovation Solution
A photocurable coating composition incorporating two or more kinds of fluorine-containing compounds with photoreactive functional groups, along with inorganic fine particles and a photopolymerization initiator, is used to form a low refractive layer that enhances scratch resistance and anti-pollution properties while maintaining low reflectance and high light transmittance, and is combined with a hard coating layer to create an anti-reflective film.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If multiple layers are formed separately to achieve low reflectance, then light interference effect is improved, but interlayer adhesion deteriorates
Solution Approach 1:
The patent combines multiple functional layers (hard coating layer and low refractive index layer) into a single integrated coating layer. This merging approach eliminates the weak interlayer adhesion problem that occurs when layers are formed separately, while still achieving both scratch resistance and low reflectance through the dual-functionality of the unified coating structure containing both inorganic fine particles and fluorine-containing compounds
Solution Approach 2:
The patent uses composite materials by combining inorganic fine particles (for hardness and scratch resistance) with fluorine-containing compounds (for low refractive index and anti-pollution properties) within a single coating matrix. This composite approach allows simultaneous achievement of multiple functions—mechanical strength, optical performance, and chemical resistance—without requiring separate layers that would suffer from adhesion issues
2Strength
If inorganic fine particles are added to improve scratch resistance, then mechanical strength is improved, but light transmittance deteriorates
Solution Approach 1:
The patent employs hollow silica fine particles with a porous hollow structure. These particles provide scratch resistance through their inorganic nature and structural integrity, while their hollow interior creates light scattering effects that enhance anti-reflective performance. The porous structure allows the particles to maintain mechanical strength while having a lower density and different optical interaction compared to solid particles, helping to preserve light transmittance
Solution Approach 2:
The patent carefully controls the particle diameter of inorganic fine particles within the range of 0.01 to 10 micrometers, with preference for 0.1 to 1 micrometer. This parameter optimization ensures that particles are small enough to minimize light scattering losses (maintaining transmittance) while still providing effective scratch resistance. The specific size range balances mechanical reinforcement with optical transparency requirements
3Object-affected harmful factors
If fluorine-containing compounds are used to reduce reflectance, then optical performance is improved, but surface durability deteriorates
Solution Approach 1:
The patent creates a composite coating system where fluorine-containing compounds (providing low refractive index and anti-pollution properties) are combined with inorganic fine particles (providing mechanical strength and scratch resistance). The inorganic particles act as a durable scaffold that maintains surface integrity, while the fluorine compounds fill the matrix to provide optical performance. This composite structure ensures that neither component compromises the other's functionality
Solution Approach 2:
The patent applies different functional components in a distributed manner within the coating layer. Inorganic fine particles are dispersed to provide localized mechanical reinforcement at potential scratch sites, while fluorine-containing compounds are distributed throughout the matrix to provide uniform low refractive index and anti-pollution properties. This local quality differentiation allows each component to optimize its specific function without compromising overall coating durability
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 resulting anti-reflective film exhibits improved scratch resistance, anti-pollution properties, and enhanced screen sharpness, with a synergistic effect from the fluorine-containing compounds that reduces pollutant interaction and improves durability and transmittance.
Implementation Method 1
a photopolymerization initiator; a photocurable coating composition for forming a low refractive layer, comprising: a photopolymerizable compound; inorganic fine particles; two or more kinds of fluorine-containing compounds comprising photoreactive functional groups; and a photopolymerization initiator
Data Source
AI summary
The present invention relates to a photocurable coating composition including: a photopolymerizable compound; inorganic fine particles; two or more kinds of fluorine-containing compounds including photoreactive functional groups; and a photopolymerization initiator, a low refractive layer including the photocured product of the photocurable coating composition, and an anti-reflective film including the low refractive layer.