OLED Display Middle Sealing Member for Moisture Barrier
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Solution Overview
Problem
The existing OLED displays face challenges in preventing moisture and oxygen penetration through the connection interface between the encapsulation member and the substrate, which can degrade the organic emission layer, and increasing the sealing region to prevent this penetration results in an unnecessary increase in non-display area.
Innovation Solution
The implementation of a middle sealing member with one side sealed to the substrate and the other side extended to enclose the edge of the encapsulation member, along with a getter positioned closer to the organic light emitting element than the sealants, maintains a vacuum state and effectively suppresses moisture and oxygen penetration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the sealing region is increased to prevent moisture and oxygen penetration through the connection interface, then the protection against moisture and oxygen is improved, but the non-display area is unnecessarily increased
Solution Approach 1:
The sealing member is extended in the vertical dimension to enclose the edge of the encapsulation member, creating a three-dimensional sealing structure. This vertical extension provides additional sealing path without increasing the horizontal sealing region width, thus preventing moisture and oxygen penetration while maintaining a compact display area.
Solution Approach 2:
The sealing member is positioned between the substrate and the encapsulation member, creating a nested sealing structure. The sealing member encloses the edge of the encapsulation member, forming a multi-layer protective configuration that enhances sealing effectiveness without requiring a larger overall sealing region.
2Ease of manufacture
If a traditional sealing structure is used, then the manufacturing process is simpler, but moisture and oxygen can still penetrate through the connection interface
Solution Approach 1:
The sealing structure is divided into multiple functional components: a sealing member with specific geometric features (including an enclosing portion), a substrate, and an encapsulation member. Each component performs a specific sealing function, and they are assembled together to create a comprehensive sealing system that is both effective and manufacturable.
Solution Approach 2:
The sealing member is formed with a flexible structure that includes an enclosing portion capable of wrapping around and sealing the edge of the encapsulation member. This flexible sealing approach allows for effective moisture and oxygen barrier while maintaining ease of assembly and manufacturing.
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 allows for effective suppression of moisture and oxygen penetration while maintaining a vacuum state, thereby enhancing the durability of the OLED display and reducing the non-display area, making the manufacturing process easier and more efficient.
Implementation Method 1
a getter at the one side of the middle sealing member and the encapsulation member... The getter may maintain a vacuum state of a space between the substrate and the encapsulation member
Implementation Method 2
a first sealant sealing and combining the one side of the middle sealing member and the substrate to each other; a second sealant sealing and combining the other side of the middle sealing member and the encapsulation member to each other
Data Source
AI summary
An exemplary embodiment described technology relates generally to an organic light emitting diode (OLED) display and a manufacturing method thereof. The organic light emitting diode (OLED) display according to an exemplary embodiment includes: a substrate; an encapsulation member; an organic light emitting element between the substrate and the encapsulation member; a middle sealing member including one side disposed between the substrate and the encapsulation member and another side extended from the one side to be bent and enclosing an edge of the encapsulation member; a first sealant sealing and combining the one side of the middle sealing member and the substrate to each other; a second sealant sealing and combining the other side of the middle sealing member and the encapsulation member to each other; and a getter at the one side of the middle sealing member and the encapsulation member.