Light-Emitting Substrate Bridge Layout Against Electrochemical Corrosion
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Solution Overview
Problem
The existing light-emitting substrates face issues with electrochemical corrosion, particularly due to the exposure of the second conductive layer to water and oxygen, leading to potential short circuits and instability in light-emitting performance.
Innovation Solution
The light-emitting substrate design includes a base substrate with a first conductive layer having common voltage lines and connection lines, and a second conductive layer with bridge portions and connection parts, where the overlap of orthographic projections of these components on the base substrate creates an electric field direction that reduces electrochemical corrosion, and the use of insulating layers further protects against water and oxygen intrusion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the second conductive layer is exposed to the environment, then the light-emitting substrate can be manufactured with simpler structure, but electrochemical corrosion occurs due to water and oxygen intrusion
Solution Approach 1:
The patent applies insulating films (including waterproof and oxygen-blocking films) as protective thin films over the second conductive layer. These films form a barrier that prevents water and oxygen from reaching the conductive layer, thereby preventing electrochemical corrosion while maintaining a relatively simple overall structure.
Solution Approach 2:
The patent creates an inert environment by sealing the second conductive layer with insulating films that block water and oxygen. This effectively isolates the conductive layer from the corrosive environment, preventing electrochemical reactions without requiring complex protective structures.
2Reliability
If the second conductive layer is protected from water and oxygen, then electrochemical corrosion is reduced, but the structure becomes more complex with additional insulating layers
Solution Approach 1:
The patent uses thin film structures (insulating films, waterproof films, oxygen-blocking films) to provide protection. These thin films add minimal structural complexity while effectively preventing corrosion, as they can be deposited as thin layers rather than requiring thick protective barriers.
Solution Approach 2:
The patent employs composite protective structures combining multiple types of insulating films (waterproof film, oxygen-blocking film) with different functional properties. This composite approach provides comprehensive protection against both water and oxygen corrosion while maintaining reasonable structural complexity.
3Reliability
If insulating layers are added to protect conductive layers, then protection against water and oxygen is improved, but manufacturing process becomes more complex
Solution Approach 1:
The insulating protective layers are implemented as thin films that can be deposited using standard thin-film fabrication techniques. This approach maintains ease of manufacture by using established processing methods rather than requiring new complex manufacturing steps.
Solution Approach 2:
The patent uses composite insulating film structures that can be manufactured using sequential deposition processes. These composite protective layers integrate with existing manufacturing workflows, minimizing additional process complexity while providing comprehensive protection.
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 design effectively reduces electrochemical corrosion, enhancing the stability and reliability of the light-emitting substrate by minimizing the impact of water and oxygen on the conductive layers, thereby improving the overall light-emitting performance.
Implementation Method 1
an electric field is between the first bridge portion and the first connection line of which orthographic projections on the base substrate overlap; and a direction of the electric field points from the first conductive layer to the second conductive layer
Data Source
AI summary
A light-emitting substrate and a display apparatus, comprising: a base substrate; a first electrically conductive layer, located on the base substrate, the fit electrically conductive layer comprising multiple common voltage lines and multiple first connection lines spaced apart from each other, and the multiple common voltage lines extending along a first direction and being arranged along a second direction; a first insulating layer, located at a side of the first electrically conductive layer distant from the base substrate; and a second electrically conductive layer, located at a side of the first insulating layer distant from the base substrate. The second electrically conductive layer comprises multiple first bridge parts spaced apart from each other.