Photocurable Light Condensing Layer for Wider Display Brightness
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Solution Overview
Problem
Display panels face insufficient brightness, particularly at positive and deviating viewing angles, due to inefficient light condensation and scattering effects.
Innovation Solution
A photocurable composition comprising an acrylic resin, a photoinitiator, and a nano-particle composite with inorganic nano-particles modified by titanate or zirconate coupling agents, forming a light condensing layer with microstructures that enhance refractive index and even dispersion, reducing light scattering and improving light output.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If conventional materials are used for the light condensing layer, then the device complexity is low, but the display brightness is insufficient
Solution Approach 1:
The patent uses composite materials consisting of inorganic nanoparticles (such as TiO2, ZrO2, or SiO2) dispersed in an organic resin matrix to create the light condensing layer. This composite structure provides both the refractive index enhancement needed for brightness improvement and the structural properties required for light condensation, resolving the contradiction between brightness enhancement and device complexity
Solution Approach 2:
The patent changes the refractive index parameter of the light condensing layer by selecting specific inorganic nanoparticles with high refractive indices (TiO2: 2.5-2.7, ZrO2: 2.1-2.3) and controlling their concentration and size distribution. This parameter optimization enables effective light condensation and brightness enhancement without requiring complex device structures
2Illumination intensity
If the refractive index of the light condensing layer is increased to improve light condensation, then the display brightness improves, but the light scattering increases
Solution Approach 1:
The patent applies local quality by creating micro-scale refractive index variations within the light condensing layer through the dispersion of nanoparticles. The refractive index is locally enhanced at nanoparticle interfaces to condense light, while the overall layer maintains optical clarity. This localized approach allows light condensation without excessive bulk scattering
Solution Approach 2:
The patent utilizes spherical or near-spherical nanoparticle shapes (TiO2, ZrO2, SiO2) that provide smooth, curved interfaces for light interaction. These spherical structures minimize light scattering compared to irregular shapes, while still providing the refractive index contrast needed for light condensation and brightness enhancement
3Ease of manufacture
If inorganic nanoparticles are directly dispersed in the resin, then the manufacturing process is simple, but the nanoparticles aggregate and reduce effectiveness
Solution Approach 1:
The patent introduces surface treatment agents or coupling agents as intermediaries between the inorganic nanoparticles and the organic resin matrix. These intermediaries improve the compatibility and dispersion stability of nanoparticles, preventing aggregation while maintaining simple manufacturing processes. The surface treatment creates a transition layer that enhances interfacial adhesion and uniform distribution
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 enhances display brightness at positive and deviating viewing angles by converging oblique light towards perpendicular directions, increasing light output rate and reducing scattering, thus improving overall display brightness.
Implementation Method 1
the organic compound includes at least one of a titanate coupling agent and a zirconate coupling agent
Implementation Method 2
spatial steric resistance of the prepared nano-particle composite increases due to an inclusion of organic chain segments
Implementation Method 3
a refractive index of the light transmitting covering layer is less than a refractive index of the microstructure layer
Implementation Method 4
oblique light emitted by the display units of the display panel narrows after passing through the microstructure
Implementation Method 5
a photoinitiator
Data Source
AI summary
The present disclosure provides a photocurable composition, a light condensing layer, and a display device. The photocurable composition includes an acrylic resin, a photoinitiator, and a nanoparticle composite. Raw materials for preparing the nanoparticle composite include an inorganic nanoparticle, a surface of which is provided with active hydroxyl groups, and an organic compound including at least one of a titanate coupling agent and a zirconate coupling agent.