Display Device Sealing Layer with Insulated Leader Lines
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Solution Overview
Problem
Organic EL display devices face reduced lifespan due to moisture and oxygen permeation, which degrades the organic EL elements, and existing sealing techniques do not effectively prevent crosstalk between leader lines.
Innovation Solution
A display device with a sealing layer covering both the display elements and leader lines in a first sealing region, where metal portions are electrically separated from the leader lines and disposed between them, enhancing the sealing property and preventing crosstalk.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a sealing film is formed to cover the organic EL elements, then the sealing property is improved, but the leader lines remain exposed and vulnerable to moisture and oxygen
Solution Approach 1:
The patent combines the sealing function with the leader line structure by forming the sealing film to continuously cover both the display elements and the leader lines. This merging of sealing coverage eliminates the need for separate sealing structures for leader lines, improving overall sealing property while maintaining structural simplicity.
2Reliability
If the sealing layer is extended to cover the leader lines, then the sealing property in the leader region is improved, but the risk of crosstalk between leader lines increases
Solution Approach 1:
The patent segments the electrical conductive layers within the sealing structure by introducing insulating layers between adjacent leader lines. This segmentation electrically isolates the leader lines from each other, preventing crosstalk while allowing the sealing film to continuously cover the leader lines for improved sealing property.
Solution Approach 2:
The patent introduces insulating layers as intermediary structures between the leader lines and the sealing film. These insulating layers act as mediators that maintain the sealing coverage while preventing direct electrical contact between adjacent leader lines, thus eliminating crosstalk.
3Reliability
If metal portions are added between leader lines for sealing, then the sealing property is improved, but the electrical separation and crosstalk prevention become more complex
Solution Approach 1:
The patent designs the insulating layers to serve multiple functions simultaneously: they provide electrical isolation between leader lines to prevent crosstalk, and they act as adhesion promoters for the sealing film to ensure proper sealing. This multi-functionality improves sealing property while avoiding additional complexity in electrical separation structures.
Data Source
AI summary
In a display device according to the present disclosure, leader lines are led out from a display region to a leader region adjacent to the display region. In the leader region, metal portions are disposed between adjacent two of the plurality of leader lines with gaps. The gaps are formed between each of the metal portions and each of the adjacent two of the plurality of leader lines. A sealing layer covers display elements in the display region and covers the leader lines in a first sealing region of the leader region adjacent to the display region. A part of the sealing layer fills the gaps and adheres to each of the metal portions in the first sealing region.