Metal Nanoparticle Light-Scattering Substrate for OLED Thermal Resistance
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional light-scattering films for display devices are thick and have low thermal resistance, making it difficult to achieve a uniformly bright screen and maintain performance during subsequent processing steps, such as forming thin-film transistors.
Innovation Solution
A light-scattering substrate with a layer of metal nanoparticles formed by agglomeration on a substrate, which exhibits surface plasmon phenomenon, allowing for thinning and improved thermal resistance without the need for a film or sheet, and is integrated into an organic light-emitting display device structure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional plastic light-scattering film is used, then light-scattering characteristics are achieved, but thermal resistance deteriorates during subsequent TFT formation processes
Solution Approach 1:
The patent changes the material composition parameter from conventional plastic to a composite system comprising a base film with light-scattering particles and an overlying inorganic protective film. This parameter change enables the structure to withstand high-temperature TFT formation processes while maintaining light-scattering functionality, thereby improving thermal resistance and preventing thermal degradation.
2Length of moving object
If light-scattering particles are inserted into a polymer film, then light-scattering characteristics are achieved, but the film thickness must be 5-10 μm making it difficult to thin
Solution Approach 1:
The patent employs a composite material structure consisting of a base film containing light-scattering particles and an additional inorganic protective film layer. This composite approach allows the light-scattering particles to be concentrated in a thinner region while the inorganic film provides structural support and protection, enabling overall thickness reduction while maintaining effective light-scattering characteristics.
3Length of moving object
If the light-scattering film is made thin, then device thickness is reduced, but thermal resistance deteriorates and characteristics worsen under high temperature exposure
Solution Approach 1:
The patent introduces an inorganic protective film as an additional layer parameter in the structure. This parameter addition allows the base film to be made thinner for reduced device thickness while the inorganic film compensates for thermal resistance, creating a multi-layer structure where each layer performs its specific function optimally.
4Illumination intensity
If a thick light-scattering film is used, then thermal resistance is maintained, but the display device cannot achieve uniform brightness and high luminance
Solution Approach 1:
The patent uses a composite material structure where light-scattering particles are concentrated in a thin base film region to achieve uniform brightness and high luminance, while an inorganic protective film layer is added to maintain thermal resistance. This composite approach allows functional separation: the base film optimizes optical performance while the inorganic film ensures thermal stability.
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 substrate achieves uniform brightness and high luminance while maintaining thermal resistance, enabling efficient manufacturing and performance in display devices.
Implementation Method 1
a light-scattering layer composed of a plurality of metal nanoparticles which are attached to at least a surface of a substrate, wherein the metal nanoparticles are formed by agglomeration of a metal on the substrate and show a surface plasmon phenomenon
Implementation Method 2
forming a light-scattering layer composed of metal nanoparticles by annealing the metal thin film to agglomerate a metal of the metal thin film into the metal nanoparticles
Data Source
AI summary
A light-scattering substrate which can be thinned and has improved thermal resistance, a method of manufacturing the same, an organic light-emitting display device including the same, and a method of manufacturing the organic light-emitting display device are disclosed. The light-scattering substrate includes a light-scattering layer composed of a plurality of metal nanoparticles which are attached to at least a surface of a substrate. The metal nanoparticles are formed by agglomeration of a metal on the substrate, and show a surface plasmon phenomenon.