Protective Barrier Rib for OLED Sealant Intrusion
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Solution Overview
Problem
The organic electro luminescence display device is prone to deterioration in light emitting efficiency and picture quality due to sealant flow into the device, which contains moisture, oxygen, and impurities, damaging the organic light emitting layer.
Innovation Solution
The device incorporates a protective barrier rib with a wider line width than the standard barrier rib, along with dummy barrier ribs forming designated and right angles, to enclose and protect the organic electro luminescence array, preventing sealant intrusion during bonding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a standard barrier rib structure is used, then the device structure is simple, but sealant flows into the organic light emitting layer causing deterioration in light emitting efficiency and picture quality
Solution Approach 1:
The barrier rib structure is segmented into multiple functional parts: a standard barrier rib for basic separation, an extended barrier rib for enhanced sealing, and dummy barrier ribs at corners for additional protection. This segmentation allows each part to perform its specific function while collectively preventing sealant intrusion that would otherwise damage the organic light emitting layer.
Solution Approach 2:
The extended and dummy barrier ribs are formed in advance during the manufacturing process, creating a pre-established protective structure. This preliminary action ensures that when sealant is applied during bonding, it is already blocked by the extended barrier rib and dummy barrier ribs, preventing it from reaching the organic light emitting layer before damage can occur.
2Object-affected harmful factors
If the barrier rib line width is increased to prevent sealant flow, then sealant protection is improved, but the manufacturing precision requirements and device complexity increase
Solution Approach 1:
Instead of uniformly increasing the line width of the entire barrier rib structure, the invention segments the protective function across multiple ribs with different geometries. The extended barrier rib provides additional path length for sealant blockage, while dummy barrier ribs at corners provide localized protection where sealant is most likely to penetrate. This segmentation maintains reasonable manufacturing precision requirements while achieving superior sealant prevention.
Solution Approach 2:
The extended barrier rib extends in the direction perpendicular to the electrode, adding a dimensional element to the barrier structure. This extension creates an additional geometric dimension that sealant must navigate around, effectively blocking sealant intrusion without requiring excessive line width increases that would demand higher manufacturing precision.
3Object-affected harmful factors
If dummy barrier ribs are added at corner areas, then sealant flow into corners is prevented, but the device structure becomes more complex
Solution Approach 1:
Dummy barrier ribs are strategically placed only at corner areas where sealant intrusion is most likely to occur, rather than uniformly across the entire device. This local quality approach concentrates protective measures at critical vulnerability points, preventing corner sealant intrusion without adding unnecessary complexity to areas where protection is already sufficient.
Solution Approach 2:
The dummy barrier ribs act as intermediary protective elements positioned between the sealant and the organic light emitting layer at corner regions. These dummy ribs serve as a mediating barrier that intercepts sealant flow before it can reach sensitive areas, providing localized protection without requiring a complete redesign of the entire barrier structure.
Data Source
AI summary
There are disclosed an organic electro luminescence display device that is adaptive for preventing its light emitting efficiency and picture quality from being deteriorated, and a fabricating method thereof.An organic electro luminescence display device according to an embodiment of the present invention includes an organic electro luminescence array having first and second electrodes formed on a substrate with an organic light emitting layer therebetween, and a barrier rib in parallel to any one of the first and second electrodes; a protective barrier rib formed to be connected to each of the barrier ribs and to enclose the organic electro luminescence array; and at least one dummy barrier rib located at a corner area of the protective barrier rib and connected to the barrier rib and the protective barrier rib.