Self-Repairing OLED Package Structure for Crack Sealing
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Solution Overview
Problem
Organic light emitting devices (OLEDs) are sensitive to moisture and oxygen, leading to degradation, and traditional packaging methods lack effective self-repair mechanisms to maintain long-term light-emitting performance.
Innovation Solution
A package structure incorporating an inorganic layer, a self-repairing functional layer with a self-repairing material, and a heating layer that allows the self-repairing material to penetrate and repair cracks in the inorganic layer, improving the packaging effect and device quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If traditional inorganic and organic thin film packaging layers are used to block moisture and oxygen, then the blocking capability is improved, but the reliability deteriorates due to lack of self-repair mechanism for cracks
Solution Approach 1:
The self-repairing functional layer is pre-installed between the inorganic packaging layers before any cracks occur. This layer contains materials that will automatically activate and repair cracks when they form, providing a preliminary protective mechanism that enhances reliability without affecting the moisture and oxygen blocking capability of the inorganic layers.
Solution Approach 2:
The self-repairing functional layer acts as an intermediary between the inorganic packaging layers. When cracks occur in the inorganic layers, this intermediate layer provides a self-repairing mechanism that seals the cracks, thereby maintaining the integrity and reliability of the overall packaging structure while preserving the harmful factor blocking capability.
2Reliability
If self-repairing functional layer with heating is added to repair cracks, then the reliability is improved, but the device complexity increases
Solution Approach 1:
The packaging structure incorporates a self-repairing functional layer that can automatically repair cracks in the inorganic packaging layers without requiring external intervention. The layer contains materials that activate upon heating to seal cracks, enabling the device to self-diagnose and self-repair packaging damage, thereby improving reliability while adding minimal structural complexity.
Solution Approach 2:
The self-repairing functional layer utilizes changes in material parameters (such as viscosity and flow properties) in response to temperature changes. When heated, the materials in this layer change their physical state to flow into and seal cracks, then return to their original state upon cooling, providing a simple yet effective repair mechanism that does not significantly increase device complexity.
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 self-repairing package structure effectively repairs cracks in the inorganic layer, enhancing the packaging efficiency and the overall quality and performance of organic light emitting display apparatuses by preventing moisture and oxygen erosion.
Implementation Method 1
the self-repairing material to penetrate and repair cracks in the inorganic layer
Implementation Method 2
a heating layer formed on the self-repairing function layer or heating the self-repairing functional layer
Data Source
AI summary
The present disclosure relates to the field of display technology, and discloses a package structure and an organic light emitting display apparatus. The package structure includes a self-repairing functional layer and a heating layer for heating the self-repairing functional layer. A forming material of the self-repairing functional layer at least includes: a self-repairing material.