Display Panel Conductive Portion Segmentation for Peeling Prevention
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Solution Overview
Problem
Display panels face reliability issues due to peeling phenomena at the edges of conductive portions, which can lead to moisture penetration and corrosion, affecting the longevity and performance of the device.
Innovation Solution
The display panel design includes a conductive portion with defined openings and an organic layer extending to the edge of the base substrate, preventing the peeling phenomenon from progressing and enhancing the device's reliability by reducing the likelihood of moisture ingress and corrosion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the conductive portion extends to the edge of the base substrate to ensure electrical connection, then the electrical connectivity is improved, but the peeling phenomenon occurs at the edges leading to reduced reliability
Solution Approach 1:
The conductive portion is segmented by removing a portion of itself to form an opening, dividing the continuous conductive structure into separate regions. This segmentation prevents the peeling phenomenon from propagating across the entire conductive portion while maintaining electrical connectivity through the remaining conductive structures.
Solution Approach 2:
A portion of the conductive portion is extracted/removed to create an opening. This removed portion is specifically located at the edge area where peeling occurs, eliminating the vulnerable section while preserving the essential electrical connection functions through the remaining conductive structures.
2Reliability
If the conductive portion is made continuous to the edge for electrical connection, then the electrical connectivity is improved, but moisture penetration and corrosion risk increase
Solution Approach 1:
The conductive portion is divided by the opening into separate segments, creating a discontinuous structure at the edge. This segmentation interrupts the continuous path that moisture would follow, thereby reducing the risk of moisture penetration and corrosion while maintaining necessary electrical connections.
Solution Approach 2:
The vulnerable edge portion of the conductive structure is extracted to form the opening. This removal eliminates the direct exposure of the conductive material at the edge to environmental moisture, preventing corrosion while preserving electrical functionality through alternative conductive paths.
3Reliability
If the conductive portion is removed at the edge to prevent peeling, then the reliability is improved, but the electrical connection area is reduced
Solution Approach 1:
Instead of removing the entire edge conductive portion, only a specific section is removed to create an opening. This segmentation approach maintains the majority of the conductive area needed for electrical connection while eliminating only the vulnerable edge portion prone to peeling.
Solution Approach 2:
The conductive portion is modified locally at the edge area where peeling occurs, rather than reducing the overall conductive area uniformly. The opening is strategically positioned only where needed to prevent peeling, while other regions maintain full conductive coverage to ensure electrical connectivity.
Data Source
AI summary
A display panel includes a base substrate, pixels, signal lines, a power line, signal pads, power pads, and a conductive portion electrically connected to the power pads and extending from an area overlapping the power pads to an edge of the base substrate. An opening is defined in conductive portion by a removed portion thereof.