Partition Wall Blocking Portion for OLED Encapsulation
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Solution Overview
Problem
The existing encapsulating technologies for organic light-emitting display substrates are inadequate in preventing water and oxygen ingress, leading to reduced service life of the devices.
Innovation Solution
An organic light-emitting display substrate with a partition pattern layer comprising a wall portion and a blocking portion, where the blocking portion's projection area is larger than the wall portion's, effectively disconnecting the organic evaporation layer and preventing water and oxygen entry, combined with a manufacturing method that forms this structure to enhance encapsulation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If thin film encapsulation technology is used to encapsulate the organic light-emitting device, then the device structure is formed, but water and oxygen can still enter through the opening area causing device failure
Solution Approach 1:
The partition wall divides the opening area into multiple separated regions, preventing continuous water and oxygen pathways. The partition wall includes a wall portion and a blocking portion that segments the opening area, so that even if water or oxygen enters through one region, it cannot propagate continuously to the organic light-emitting device.
Solution Approach 2:
The partition wall acts as an intermediary barrier structure between the opening area and the organic light-emitting device. It includes a wall portion extending from the base substrate and a blocking portion that blocks the passage of water and oxygen, serving as a mediator that prevents harmful substances from reaching the device while allowing the opening area to maintain its structural function.
2Reliability
If a partition wall is added to block water and oxygen, then encapsulating performance improves, but the device structure becomes more complex
Solution Approach 1:
The partition wall is integrated with the base substrate and the opening area structure, merging multiple functions into a single component. The partition wall serves both as a structural element defining the opening area and as a protective barrier against water and oxygen, reducing the need for additional separate encapsulation components.
Solution Approach 2:
The partition wall performs multiple functions simultaneously: it defines the opening area boundary, provides structural support, and acts as a barrier against water and oxygen ingress. The wall portion provides structural division while the blocking portion provides protective function, making the partition wall a multi-functional component that reduces overall device complexity.
Data Source
AI summary
Provided is an organic light-emitting display substrate and a manufacturing method thereof, and an organic light-emitting display device. The organic light-emitting display substrate includes a display area and an opening area located at the display area. The display area includes: a base substrate; a partition pattern layer located on one side of the base substrate and including a partition wall around the opening area, the partition wall including a wall portion and a blocking portion located on one side of the wall portion away from the base substrate, an orthographic projection of the blocking portion on the base substrate covering and having an area greater than that of the wall portion on the base substrate; and an organic evaporation layer located on one side of the partition pattern layer away from the base substrate, the organic evaporation layer is discontinuous by being blocked by the partition wall.