Encapsulating Substrate Metal Coating for OLED Heat and Rigidity
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Solution Overview
Problem
Organic light-emitting display devices face challenges in achieving high heat radiation efficiency while preventing damage from external impacts without increasing overall thickness, as materials with high thermal conductivity often lack rigidity.
Innovation Solution
An organic light-emitting display device with a metal coating layer containing dispersed metal particles on the outer surface of an encapsulating substrate, combined with a capping layer, enhances the rigidity of the encapsulating substrate while maintaining high thermal conductivity and minimizing thickness increase.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If an encapsulating substrate made of material with high thermal conductivity (e.g., aluminum) is used, then heat radiation efficiency is improved, but rigidity decreases making the light-emitting element vulnerable to external impact
Solution Approach 1:
The patent uses a composite structure consisting of an encapsulating substrate with high thermal conductivity material and a metal coating layer with high rigidity. This composite design allows the substrate to efficiently conduct heat while the metal coating layer provides mechanical strength and resistance to external impacts, thereby resolving the contradiction between heat radiation efficiency and rigidity.
2Strength
If the thickness of the encapsulating substrate is increased to prevent damage from external impact, then rigidity is improved, but the overall thickness of the display device increases
Solution Approach 1:
The patent employs a thin metal coating layer deposited on the encapsulating substrate surface. This thin film structure provides the necessary rigidity and impact resistance without requiring significant thickness increase, thus maintaining the overall thin profile of the display device while improving mechanical strength.
3Strength
If additional layers are added to reinforce rigidity on the encapsulating substrate, then resistance to external impact is improved, but device complexity and thickness increase
Solution Approach 1:
The metal coating layer serves multiple functions simultaneously: it provides mechanical reinforcement against external impacts, maintains the thermal conductivity of the encapsulating substrate, and can be applied as a single integrated layer rather than multiple separate reinforcement layers. This multi-functional approach reduces overall device complexity while achieving the desired rigidity.
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 configuration improves heat radiation efficiency, prevents damage from external impacts, and simplifies the manufacturing process by reducing surface roughness and allowing for easier substrate alignment, thereby enhancing the reliability and efficiency of the display device.
Implementation Method 1
The encapsulating substrate may include aluminum... rapidly emit heat generated in the light-emitting element and/or the driving circuit to the outside
Data Source
AI summary
An organic light-emitting display device including an encapsulating layer covering a light-emitting element and an encapsulating substrate on the encapsulating layer is provided. The organic light-emitting display device may include metal particles which are dispersed on an outer surface of the encapsulating substrate having a high thermal conductivity, so that damage of the light-emitting element due to external impact may be prevented. And, the organic light-emitting display device may include a capping layer covering the metal particles, so that the surface roughness due to the metal particles may be reduced.