OLED Glass Composition for Optical Uniformity and Higher Yield
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Solution Overview
Problem
Existing OLED glass substrates suffer from high photoelastic coefficient, low Abbe number, low modulus of elasticity, non-uniform internal performance, high defect rate, and low product yield due to silicon and aluminum raw material inhomogeneity, leading to poor optical and mechanical performance.
Innovation Solution
An OLED glass composition comprising specific percentages of SiO2, Al2O3, B2O3, BaF2, SrO, BeF2, SnO2, La2O3, P2O5, AlF3, and AgNO3, with a manufacturing process involving sieving and stirring to ensure uniformity, reduces defects and improves optical and mechanical performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If silicon and aluminum raw materials are used for OLED glass, then the glass can be manufactured with basic performance requirements, but inhomogeneity and non-uniform particle sizes cause defects such as knots and stones, leading to high defect rate and low product yield
Solution Approach 1:
The patent applies preliminary action by sieving the silicon and aluminum raw materials before glass manufacturing. This pre-processing step removes large particles and ensures uniform particle size distribution, preventing the formation of knots and stones during glass production. The sieving operation is performed before mixing and melting, thereby eliminating potential defects at the source and increasing product yield.
2Reliability
If the glass internal structure is inhomogeneous or residual stress is large, then the photoelastic coefficient increases, but this affects the optical performance of the glass
Solution Approach 1:
The patent applies parameter changes by carefully controlling the chemical composition parameters of the glass melt. Specific ratios of silicon oxide, aluminum oxide, and other oxides are maintained to ensure homogeneous nucleation and crystal growth. This compositional control prevents residual stress formation and maintains low photoelastic coefficient, thereby improving optical performance reliability.
3Reliability
If environmentally unfriendly raw materials such as Pb and V are added to glass, then superior optical performance is achieved, but the glass cannot be used in large quantities due to environmental concerns
Solution Approach 1:
The patent applies the principle of replacing expensive and environmentally harmful materials with cheaper, eco-friendly alternatives. Traditional heavy metals like lead and vanadium are substituted with lighter, environmentally benign metal oxides such as barium fluoride, strontium oxide, and beryllium fluoride. These alternative materials provide comparable or superior optical properties without the environmental hazards, enabling large-scale production.
4Reliability
If multiple types of rare earth raw materials are used in glass, then optical performance is improved, but the glass becomes expensive and difficult to popularize
Solution Approach 1:
The patent applies local quality by using small amounts of specific rare earth oxides (lanthanum oxide, phosphorus pentoxide, aluminum fluoride, silver nitrate) as additives rather than relying on large quantities of multiple rare earth materials. These localized additions at optimized concentrations provide significant optical performance improvements while keeping the overall manufacturing cost manageable and enabling wider commercial application.
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 glass exhibits lower melting temperature, higher transmittance, reduced photoelastic coefficient, increased Abbe number, and higher Vickers hardness, with a 2-3% increase in product yield and improved mechanical strength.
Implementation Method 1
the glass exhibits lower melting temperature, higher transmittance, reduced photoelastic coefficient, increased Abbe number
Implementation Method 2
The glass of the present invention has a low melting point
Data Source
AI summary
An OLED glass with improved optical performance relates to the field of glass production and manufacturing, and is manufactured from the following raw materials in percentage by weight: 57-62% of SiO2, 20-24% of Al2O3, 0.5-2% of B2O3, 2-5% of BaF2, 8-11% of SrO, 0.5-1.5% of BeF2, 0.2-0.5% of SnO2, 0.3-1.0% of La2O3, 0.2-1.0% of P2O5, 0.2-0.8% of AlF3, and 0.1-0.3% of AgNO3. Silicon dioxide and aluminum oxide are sieved and stirred uniformly, mixed uniformly with the remaining raw materials, melted, thinned in a tin bath and formed, annealed, and cut, to obtain a product. The glass not only meets the performance of optical glass, but also has excellent mechanical performance and thermal performance, which has an improved application prospect in OLED glass and display industries.