OLED Thin Film Encapsulation Protrusions
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional OLED thin film encapsulation structures have a poor effect on increasing light due to their flat surface and fixed refractive index, which limits their optical performance.
Innovation Solution
The structure incorporates a substrate with alternating organic and inorganic layers, featuring spherical or semi-spherical protrusions arranged in a rectangular array, with corresponding grooves and protrusions on each layer to enhance light emission efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If conventional OLED thin film encapsulation structure uses flat organic film layers, then the structure is simple and easy to manufacture, but the light emission efficiency is poor
Solution Approach 1:
The patent applies spheroidality by forming spherical protrusions on the organic film layers. These spherical structures have curved surfaces that differ from the conventional flat surface, enabling better light extraction through reduced total internal reflection and improved light scattering, thereby enhancing light emission efficiency while maintaining manufacturing feasibility through standard deposition processes
Solution Approach 2:
The patent implements local quality by creating localized spherical protrusions at specific positions on the organic film layers rather than changing the entire structure. The protrusions are formed with controlled density, size, and distribution, allowing different regions of the device to have optimized optical properties while maintaining overall structural simplicity and ease of manufacture
2Adaptability or versatility
If conventional OLED thin film encapsulation structure uses fixed refractive index between 1.5 and 1.6, then the material selection is simple, but the optical effect is limited and light increasing effect is poor
Solution Approach 1:
The patent applies parameter changes by modifying the physical structure of the organic film layers through spherical protrusions, which changes the effective refractive index and optical path differences within the device. This structural parameter change enables better light extraction without requiring complex multi-layer refractive index matching designs, thus improving optical performance while avoiding excessive device complexity
Solution Approach 2:
The patent implements dimensionality change by transitioning from a two-dimensional flat film structure to a three-dimensional structure with spherical protrusions. This adds vertical dimensionality to the organic film layers, creating optical path differences and interference effects that enhance light emission, thereby improving adaptability in optical performance without significantly increasing device complexity
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
This design increases light brightness and efficiency by creating microstructures that improve light emission, overcoming the limitations of conventional technologies.
Implementation Method 1
a plurality of first protrusions disposed with intervals on the first organic layer and/or the second organic layer
Implementation Method 2
a refractive index is mostly fixed between 1.5 and 1.6. Therefore, an optical effect has a little effect
Data Source
AI summary
An OLED thin film encapsulation structure and a method of fabricating the same are provided. The OLED thin film encapsulation structure has: a substrate, a first organic layer disposed on the substrate; a first inorganic layer which is a hydrophobic layer; a second organic layer; a second inorganic layer which is disposed on the first inorganic layer and the second organic layer, and is a hydrophobic layer; and a plurality of first protrusions disposed with intervals on the first organic layer and/or the second organic layer.