Display Apparatus Protection Conductive Layer Bonding
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional display apparatuses face issues with layers peeling off during manufacturing or usage, leading to potential damage and reduced performance.
Innovation Solution
The display apparatus incorporates a substrate with a first insulating layer, a protection conductive layer, and an encapsulation layer, where the protection layer includes lithium fluoride, enhancing bonding strength between the encapsulation and protection conductive layers to prevent detachment, and a capping layer with a protection layer to prevent direct contact between the capping and encapsulation layers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional encapsulation layers are used to protect the OLED, then protection from moisture and impurities is achieved, but layer detachment occurs during manufacturing or usage
Solution Approach 1:
A protection conductive layer is introduced as an intermediary between the encapsulation layer and the electrode power supply line. This intermediate layer prevents direct contact between the encapsulation layer and the electrode power supply line, thereby preventing layer detachment while maintaining the protective function against moisture and impurities.
Solution Approach 2:
The protection conductive layer is formed as a composite structure combining a lower protection conductive layer and an upper protection conductive layer with different materials and functions. The lower layer provides electrical connection and protection, while the upper layer provides additional protection and structural stability, preventing encapsulation layer detachment.
2Device complexity
If the encapsulation layer directly contacts the capping layer, then structural simplicity is maintained, but bonding strength is insufficient leading to detachment
Solution Approach 1:
The protection conductive layer serves as an intermediary between the encapsulation layer and the capping layer, providing enhanced bonding strength. This intermediate layer ensures strong adhesion between the encapsulation layer and the capping layer, preventing detachment while maintaining reasonable structural complexity.
Solution Approach 2:
The bonding strength is enhanced by changing the material parameters of the protection conductive layer. The layer is formed with specific materials having high adhesion properties, and its thickness is optimized to provide sufficient bonding strength between the encapsulation layer and the capping layer.
3Reliability
If the protection conductive layer extends over the electrode power supply line, then electrical connection is ensured, but manufacturing precision requirements increase
Solution Approach 1:
The protection conductive layer is designed to perform multiple functions: it provides electrical connection between the electrode power supply line and the opposite electrode, protects the electrode power supply line, and enhances bonding strength. This multi-functional design simplifies the overall structure and reduces manufacturing precision requirements compared to separate dedicated layers for each function.
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 effectively prevents or minimizes detachment of layers during manufacturing and usage, ensuring the structural integrity and performance of the display apparatus.
Implementation Method 1
A bonding strength between the encapsulation layer and the protection conductive layer may be higher than a bonding strength between the encapsulation layer and the capping layer
Data Source
AI summary
A display apparatus includes: a substrate having a display area and a peripheral area outside the display area; a first insulating layer over both the display area and the peripheral area; a first dam over the peripheral area and spaced apart from the first insulating layer; an electrode power supply line, at least a part of the electrode power supply line being located between the first insulating layer and the first dam; a protection conductive layer over the first insulating layer, the protection conductive layer extending over the electrode power supply line and electrically connected to the electrode power supply line; a pixel electrode over the first insulating layer in the display area; an opposite electrode over the pixel electrode; and a capping layer covering the opposite electrode and extending outside the opposite electrode such that an end of the capping layer is on the first insulating layer.