Grooved Isolation Column for Display Panel Cathode Segmentation
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Solution Overview
Problem
In display panels with a hole-in-display design, water vapor seeps into the display region through the cathode, leading to packaging failures due to electrochemical reactions between metals, which existing isolation columns fail to adequately prevent.
Innovation Solution
An isolation column with an insulation isolation portion having a recessed groove separates the cathode into discontinuous parts, electrically insulating them and preventing water vapor ingress, while an organic insulation layer provides stability and ease of formation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If an isolation column is disposed around the hole to separate the cathode, then water vapor seeping is cut off, but the display panel is at risk of packaging failure
Solution Approach 1:
The cathode is segmented into multiple separate cathode portions by the isolation column with groove structure. The groove divides the cathode into a first cathode portion and a second cathode portion, preventing continuous water vapor transmission path while maintaining isolation effectiveness.
Solution Approach 2:
The insulation layer is introduced as an intermediary substance filling the groove to provide electrical insulation between separated cathode portions. This intermediary prevents electrochemical reactions while allowing the isolation column to maintain its water vapor blocking function.
2Object-affected harmful factors
If the cathode is separated at the isolation column, then water vapor transmission path is cut off, but electrochemical reactions may occur between metals
Solution Approach 1:
The insulation layer acts as a mediator between the separated cathode portions, preventing direct metal-to-metal contact that would enable electrochemical reactions. The insulation material fills the groove to ensure electrical isolation while the isolation column structure blocks water vapor transmission.
Solution Approach 2:
The groove structure creates a local quality change in the isolation column, providing both mechanical isolation and electrical insulation at the critical interface between cathode portions. The groove geometry is optimized to simultaneously achieve water vapor blocking and electrical insulation.
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 solution effectively cuts off paths for water vapor and current transmission, preventing electrochemical reactions and enhancing packaging reliability by ensuring the cathode is separated and electrically insulated, thus reducing the risk of packaging failure.
Implementation Method 1
based on an insulation characteristic of the insulation isolation portion, the two separated parts of the first cathode portion that respectively extend on the first film layer and the first surface are electrically insulated from each other
Implementation Method 2
The groove is used as an isolation groove to separate two parts of the first cathode portion that respectively extend on the first film layer and the first surface. In this way, the first cathode portion forms a plurality of discontinuous parts. This effectively cuts off a path for water vapor seeping
Data Source
AI summary
A display panel comprises a hole, a transition region, and an image display region. A display layer of the display panel is located on a side of a substrate and includes a first cathode portion. The display panel further includes an isolation column located in the transition region, and a first film layer is in contact with the isolation column. The isolation column includes an insulation isolation portion. A part of a side wall of the insulation isolation portion is recessed toward an inside of the insulation isolation portion to form a groove. A first surface of a side of the insulation isolation portion is away from the substrate. The first cathode portion extending on the first film layer is separated at the groove from the first cathode portion extending on the first surface.