Auxiliary Encapsulation Layer for OLED Panel Moisture Blocking
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Solution Overview
Problem
Current thin film encapsulation methods for organic light-emitting display panels are insufficient in blocking water and oxygen, particularly at bending and boundary regions where the inorganic layer is prone to cracking or peeling, leading to channels for intrusion into the organic light-emitting device.
Innovation Solution
An auxiliary encapsulation layer is applied on the outer surface of the inorganic layer, specifically covering bending and boundary regions to block water and oxygen channels, enhancing the encapsulation film's ability to prevent moisture and gas intrusion even if the inorganic layer cracks or peels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a thin film encapsulation method with laminated inorganic and organic layers is used, then the organic light-emitting device is protected from water and oxygen intrusion, but the inorganic layer cracks or peels in bending and boundary regions, forming channels for water and oxygen intrusion
Solution Approach 1:
The patent applies an auxiliary encapsulation layer on the outer surface of the inorganic layer, specifically covering bending and boundary regions, before cracks or peeling can occur. This preventive measure blocks water and oxygen channels that would form due to inorganic layer cracking, thus cushioning against the anticipated failure mode and maintaining encapsulation reliability.
2Reliability
If the inorganic layer is made thicker to improve barrier properties, then water and oxygen blocking ability is enhanced, but the inorganic layer becomes more prone to cracking in bending regions
Solution Approach 1:
The patent segments the encapsulation function into multiple components: the inorganic layer provides the primary barrier against water and oxygen, while the auxiliary encapsulation layer specifically protects the bending and boundary regions where cracks would form. This segmentation allows each layer to optimize its thickness and properties without compromising the other, maintaining both barrier performance and flexibility.
Solution Approach 2:
The patent adds a spatial dimension to the encapsulation structure by applying the auxiliary encapsulation layer specifically at the outer surface of the inorganic layer in bending and boundary regions. This targeted dimensional approach provides enhanced protection exactly where needed without requiring uniform thickening of the entire inorganic layer, thus preserving flexibility while improving barrier properties at critical locations.
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 auxiliary encapsulation layer effectively reinforces the encapsulation film's barrier properties, ensuring the longevity of the organic light-emitting device by blocking water and oxygen molecules, thereby maintaining the device's performance and reliability.
Implementation Method 1
an auxiliary encapsulation layer encapsulating the organic light-emitting device... blocking water and oxygen channels
Data Source
AI summary
The present invention discloses an organic light-emitting display panel, a manufacturing method thereof, and an encapsulation film thereof. In this invention, an auxiliary encapsulation layer is disposed on an outer side of an inorganic layer, and the auxiliary encapsulation layer at least covers a bending region of the inorganic layer and a boundary region of the inorganic layer. Even if the inorganic layer cracks or peels in the bending region and the boundary region, a channel of water and oxygen generated at a cracked place or a peeling place is blocked by the auxiliary encapsulation layer, thereby ensuring an ability of the encapsulation film to block water and oxygen into an organic light-emitting device.