Organic-Inorganic Hybrid Composition for Optical Members
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Solution Overview
Problem
Liquid crystal display (LCD) optical sheets suffer from significant light loss and reliability issues due to high refractivity requirements and the use of sulfur compounds prone to yellowing, which affect the quality and longevity of the display.
Innovation Solution
An organic-inorganic hybrid composition with a core-shell inorganic particle structure, comprising a titanium and barium core and a zirconium, aluminum, and chromium shell, dispersed in a curable resin, is used to enhance the refractive index and luminance of optical members, reducing light loss and improving durability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If sulfur compounds are used to produce low cost optical sheets with high refractivity, then manufacturing cost is reduced and refractive index is improved, but product reliability deteriorates due to yellowing
Solution Approach 1:
The patent uses a composite inorganic particle system consisting of a titanium oxide core with a barium oxide shell, combined with zinc oxide particles. This composite structure achieves high refractivity through the titanium oxide core while the barium oxide shell and zinc oxide particles prevent yellowing, thus maintaining reliability without sacrificing cost-effectiveness.
Solution Approach 2:
The patent changes the chemical composition parameters of the inorganic particles by specifying titanium oxide (TiO2) with 40-70 wt%, barium oxide (BaO) with 10-30 wt%, and zinc oxide (ZnO) with 10-30 wt%. This parameter optimization achieves the desired balance between refractivity, anti-yellowing properties, and manufacturing cost.
2Loss of energy
If structural alteration of optical sheets is made to reduce light loss, then light transmission is improved, but manufacturing complexity increases
Solution Approach 1:
Instead of altering the structural configuration of optical sheets, the patent changes the material composition parameters by incorporating specific inorganic particles (titanium oxide, barium oxide, and zinc oxide) in optimized ratios. This achieves improved light transmission through enhanced refractivity without increasing structural complexity.
3Loss of energy
If high refractivity material is used to minimize light loss, then light transmission is improved, but manufacturing cost increases
Solution Approach 1:
The patent creates a cost-effective composite material system where titanium oxide provides high refractivity, barium oxide enhances the refractive index further, and zinc oxide prevents yellowing. This composite approach achieves superior optical performance without the prohibitive cost of single-material high-refractivity solutions.
Solution Approach 2:
The patent optimizes the weight ratio parameters of the inorganic components (TiO2: 40-70%, BaO: 10-30%, ZnO: 10-30%) to achieve the desired refractivity and anti-yellowing properties at a reasonable manufacturing cost, avoiding the need for expensive alternative materials.
4Productivity
If prism-mountains structure is used in light-collecting sheet, then light collection efficiency is improved, but structural stability deteriorates under external stress
Solution Approach 1:
The patent incorporates zinc oxide particles alongside the titanium oxide-core/barium oxide-shell structure. The zinc oxide particles enhance the overall structural stability and mechanical strength of the light-collecting sheet, preventing the collapse of prism-mountains under external stress while maintaining light collection efficiency.
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 hybrid composition significantly improves light transmittance and luminance while preventing yellowing, leading to enhanced display quality and reliability by minimizing light loss and maintaining optical performance under stress.
Implementation Method 1
inorganic particles dispersed in the curable resin... improve a liquid-phase refractive index, luminance and light transmittance
Implementation Method 2
produce optical sheets with material having a high refractivity
Implementation Method 3
preventing yellowing... shell containing at least one selected from zirconium, aluminum and chromium
Data Source
AI summary
Disclosed is an organic-inorganic hybrid composition. The organic-inorganic hybrid composition includes a curable resin and inorganic particles dispersed in the curable resin. The inorganic particle has a core-shell structure composed of a core containing titanium and barium, and a shell containing at least one selected from zirconium, aluminum and chromium. According to this organic-inorganic hybrid composition, a liquid-phase refractive index of the composition can be improved, and as a result, luminance and light transmittance can be improved in an optical member using the same.