OLED Display Panel Outer Electrode Blocking Portions
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Solution Overview
Problem
Existing OLED display panels are prone to water vapor erosion due to the formation of hollow channels between retaining walls, which compromises the reliability of the device.
Innovation Solution
Incorporating outer blocking portions at the edge regions of outer electrode lines, which break the edge lines and prevent the formation of hollow channels, ensuring that residual organic material does not communicate between retaining walls, thus eliminating water vapor erosion channels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If outer electrode lines are exposed in the gap region between retaining walls, then manufacturing simplicity is improved, but water vapor erosion reliability deteriorates due to hollow channel formation
Solution Approach 1:
The patent divides the continuous outer electrode line into segmented sections by introducing outer blocking portions at edge regions. This segmentation prevents the formation of continuous hollow channels that would allow water vapor erosion, while maintaining the exposed structure's manufacturing simplicity. The blocking portions create discrete segments that break the erosion pathway.
Solution Approach 2:
The outer blocking portion acts as an intermediary element introduced into the gap region between retaining walls. This intermediary structure prevents direct communication between the first and second retaining walls through the outer electrode line, blocking the water vapor erosion channel while allowing the electrode line to remain exposed for manufacturing purposes.
2Reliability
If outer blocking portions are added to break edge lines, then water vapor erosion reliability is improved, but device complexity increases
Solution Approach 1:
The patent applies the outer blocking portions only at specific edge regions of the outer electrode lines, rather than throughout the entire structure. This localized application maintains reliability by blocking erosion channels only where needed at the vulnerable edge regions, while minimizing the overall added complexity to the device structure.
Data Source
AI summary
An organic light-emitting diode (OLED) display panel and a display device are provided. An array substrate in the OLED display panel is provided with a first retaining wall surrounding a display region of the array substrate, and a second retaining wall surrounding the first retaining wall. Multiple outer electrode lines are exposed in a gap region between the first retaining wall and the second retaining wall on the array substrate. At least one of the multiple outer electrode lines is provided with at least one outer blocking portion at an edge region on at least one side of the outer electrode line, and the outer blocking portion breaks an edge line on the side of the outer electrode line in an extending direction of the outer electrode line and in contact with the outer electrode line.