Core-Shell Bonding Member for OLED Encapsulation
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Solution Overview
Problem
Current display apparatuses, particularly OLEDs, face challenges in effectively preventing moisture and oxygen infiltration, which can lead to reduced lifespan due to external factors, and existing encapsulation methods like multi-layer thin-film encapsulation are complex and less productive.
Innovation Solution
A display apparatus incorporating a core-shell structure bonding member with an oxide core and polymer shell, applied at the edges of the display unit, interposed between the substrate and a barrier film, which reacts with moisture and oxygen to form an inorganic oxide barrier, effectively preventing infiltration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multi-layer thin-film encapsulation is used, then moisture and oxygen infiltration prevention is improved, but device complexity and manufacturing complexity increase
Solution Approach 1:
The bonding member uses a composite material structure consisting of an inorganic oxide core and an organic polymer shell. The inorganic oxide core provides effective barrier properties against moisture and oxygen infiltration, while the organic polymer shell provides chemical bonding capability to the substrate. This composite structure achieves reliable encapsulation without requiring complex multi-layer thin-film structures.
2Reliability
If multi-layer thin-film encapsulation is used, then moisture and oxygen infiltration prevention is improved, but productivity decreases
Solution Approach 1:
The bonding member is segmented into two functional parts: an inorganic oxide core for barrier properties and an organic polymer shell for bonding. This segmentation allows each material to perform its specific function optimally, achieving effective encapsulation while simplifying the manufacturing process compared to multi-layer thin-film encapsulation, thereby improving productivity.
3Ease of manufacture
If a simple bonding member is used, then ease of manufacture is improved, but moisture and oxygen infiltration prevention deteriorates
Solution Approach 1:
The bonding member employs a composite material system with an inorganic oxide core providing barrier properties and an organic polymer shell providing bonding capability. This composite approach maintains manufacturing simplicity while achieving effective protection against moisture and oxygen infiltration, resolving the contradiction between ease of manufacture and reliability.
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 solution enhances the encapsulation of OLEDs by creating a stable barrier that prevents moisture and oxygen ingress, improving the lifespan of the display apparatus while simplifying the manufacturing process and increasing productivity compared to traditional methods.
Implementation Method 1
The oxide may react with moisture or oxygen, thereby forming an inorganic oxide.
Implementation Method 2
a shell including a polymer chemically bonded to the core
Data Source
AI summary
A display apparatus, including a substrate; a display unit on the substrate; a bonding member on the substrate and surrounding at least edges of the display unit; and a barrier film on the substrate, the bonding member interposed between the substrate and the barrier film, the bonding member including a core-shell structure, including a core including an oxide, and a shell including a polymer chemically bonded to the core.