Organic Light-Emitting Display Particle Unit for Luminescent Efficiency
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Solution Overview
Problem
Existing organic light-emitting display apparatuses face challenges in achieving high luminescent efficiency and display quality due to inefficient light dispersion and reflection, particularly with particle sizes below 300 angstroms leading to poor luminescent efficiency and excessive light loss with sizes above 1000 angstroms.
Innovation Solution
The apparatus includes a substrate with a first electrode, a particle unit comprising separate Ag particles of specific sizes (300-1000 angstroms) on the electrode, an intermediate organic emission layer, and a second electrode, where the particle unit is formed through a thermal treatment process to enhance light dispersion and reflection, improving luminescent efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If particle size is increased above 1000 angstroms, then light reflection capability is improved, but optical loss increases and luminescent efficiency decreases
Solution Approach 1:
The patent applies parameter changes by precisely controlling the particle size within the range of 300-1000 angstroms. This specific size range was determined through systematic experimentation to achieve the optimal balance between light reflection capability and optical loss, representing a quantitative parameter optimization to resolve the technical contradiction.
Solution Approach 2:
The patent applies local quality by creating a particle unit with non-uniform distribution of particles having different sizes within the 300-1000 angstrom range. This local variation in particle characteristics allows different regions to optimize for either light reflection or minimize optical loss depending on the specific operational requirements, thereby resolving the contradiction between these two opposing requirements.
2Loss of energy
If particle size is decreased below 300 angstroms, then optical loss is reduced, but luminescent efficiency deteriorates
Solution Approach 1:
The patent applies parameter changes by establishing the lower bound of particle size at 300 angstroms. This minimum size threshold was determined through systematic experimentation to ensure sufficient luminescent efficiency while maintaining acceptable optical loss levels, representing a quantitative parameter optimization to resolve the technical contradiction.
Solution Approach 2:
The patent applies local quality by incorporating particles at the larger end of the size spectrum (closer to 1000 angstroms) in specific regions where high luminescent efficiency is prioritized, while using smaller particles (closer to 300 angstroms) in regions where minimizing optical loss is more critical, thereby locally optimizing the trade-off between these two parameters.
3Ease of manufacture
If uniform particle layer is used, then manufacturing process is simplified, but light dispersion and reflection efficiency is reduced
Solution Approach 1:
The patent applies segmentation by dividing the particle unit into multiple particles with different sizes rather than using a uniform particle layer. This segmentation creates varied light interaction paths, enhancing light dispersion and reflection efficiency while maintaining a relatively simple manufacturing process through co-deposition of multiple particle sizes.
Solution Approach 2:
The patent applies composite materials by creating a particle unit composed of particles with different sizes within the 300-1000 angstrom range. This composite structure leverages the complementary optical properties of different particle sizes to achieve superior light dispersion and reflection efficiency compared to uniform particles, while the particles are formed together in a single conductive layer processing step.
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 described configuration enhances luminescent efficiency and display quality by effectively dispersing and reflecting visible light, preventing voltage drops in the second electrode, and reducing optical loss, thereby improving the overall performance of the organic light-emitting display apparatus.
Implementation Method 1
The described configuration enhances luminescent efficiency and display quality by effectively dispersing and reflecting visible light
Implementation Method 2
The particle unit is formed through a thermal treatment process to enhance light dispersion and reflection
Implementation Method 3
The forming of the particle unit may include forming a conductive layer that includes Ag, and performing a thermal treatment on the conductive layer so as to allow the Ag to agglomerate
Implementation Method 4
performing a thermal treatment on the conductive layer so as to allow the Ag to agglomerate
Data Source
AI summary
An organic light-emitting display apparatus includes a substrate; a first electrode on the substrate; a particle unit including a plurality of particles that are separate from each other on a top surface of the first electrode; an intermediate layer on the first electrode and the particle unit and including an organic emission layer; and a second electrode on the intermediate layer.