OLED Display Sealing Member with Laminated Metal Layers
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Solution Overview
Problem
Organic light emitting diode (OLED) displays face deterioration due to moisture and oxygen infiltration, requiring effective sealing to enhance display quality and lifespan, especially as they increase in size, while also needing a heat-radiating structure and cost-effective manufacturing.
Innovation Solution
An OLED display structure featuring a substrate with a display unit, a conductive contact layer, and a sealing member composed of laminated metal layers with an insulating adhesive layer, where the metal layers are electrically connected to the display unit through the conductive contact layer, providing multi-layered blocking structures for improved sealing and heat-radiation, and a simplified manufacturing process with reduced material and manufacturing costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a sealing structure is added to suppress moisture and oxygen infiltration, then display quality and lifespan are improved, but device complexity increases
Solution Approach 1:
The sealing member is constructed as a composite structure comprising multiple metal layers (first metal layer and second metal layer) laminated with an insulating adhesive layer therebetween. This composite material approach provides effective moisture and oxygen barrier properties while maintaining structural integrity, thereby improving display reliability without excessive complexity increase.
Solution Approach 2:
The sealing member serves multiple functions simultaneously: it acts as a moisture barrier, oxygen barrier, and electrical insulator. The insulating adhesive layer not only bonds the metal layers together but also provides electrical insulation between the first and second metal layers, eliminating the need for separate insulating components and reducing overall structural complexity.
2Reliability
If multiple metal layers are laminated with insulating adhesive layer, then sealing performance is improved, but manufacturing complexity increases
Solution Approach 1:
The sealing member is divided into distinct functional segments: the first metal layer for moisture and oxygen blocking, the insulating adhesive layer for bonding and electrical insulation, and the second metal layer for additional barrier protection. This segmentation allows each layer to be optimized independently while simplifying the overall manufacturing process through modular assembly.
Solution Approach 2:
By using composite materials with clearly defined interfaces and functions, the manufacturing process becomes more controllable. The insulating adhesive layer serves as both a bonding agent and an electrical insulator, reducing the number of separate manufacturing steps needed compared to using separate materials for each function.
3Reliability
If conductive contact layer is used to electrically connect metal layers to display unit, then electrical connectivity is improved, but device complexity increases
Solution Approach 1:
The conductive contact layer performs multiple functions: it provides electrical connection between the sealing member metal layers and the display unit, and it serves as a structural bonding interface. This multi-functionality reduces the need for additional separate connection components, thereby improving electrical connectivity without proportionally increasing 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 solution effectively suppresses moisture and oxygen infiltration, improving display quality and lifespan, achieving satisfactory heat-radiation, and simplifying the manufacturing process for large-size OLED displays while maintaining low costs.
Implementation Method 1
a sealing member composed of laminated metal layers with an insulating adhesive layer
Implementation Method 2
a light thin sealing structure having excellent heat-radiating effect is required
Implementation Method 3
the plurality of metal layers is electrically connected to the display unit through the conductive contact layer
Data Source
AI summary
An organic light emitting diode (OLED) display with improved display unit sealing performance is provided. The OLED display includes a substrate, a display unit formed over the substrate and including a plurality of pixels, a conductive contact layer disposed at a distance from the display unit around the display unit, and a sealing member facing the display unit and being fixed to the substrate by the conductive contact layer. The sealing member includes a plurality of metal layers laminated with an insulating adhesive layer formed therebetween, and the plurality of metal layers is electrically connected to the display unit through the conductive contact layer.