Light-Emitting Substrate Voltage Layout Against Cu Corrosion
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Solution Overview
Problem
The electrochemical corrosion between the conductive layers in light-emitting substrates, particularly at overlapping regions with different voltage potentials, leads to reduced light-emitting stability and potential short circuits, which affects the performance and longevity of the substrate.
Innovation Solution
The light-emitting substrate design includes a specific arrangement of conductive layers and insulation layers to minimize electrochemical corrosion by ensuring that voltage differences across overlapping regions are managed to reduce exposure to water and oxygen, using Cu for low resistance and insulation to protect against corrosion, and employing a structured connection of light-emitting elements to stabilize the electrical connections.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conductive layers are arranged with overlapping regions to connect light-emitting elements, then electrical connection is achieved, but electrochemical corrosion occurs due to voltage differences
Solution Approach 1:
The patent applies equipotentiality by connecting multiple light-emitting elements to the same common voltage line, ensuring they operate at the same potential. This eliminates voltage differences between overlapping conductive layers, preventing electrochemical corrosion while maintaining electrical connection stability
Solution Approach 2:
The patent introduces a common voltage line as an intermediary conductive layer between driving voltage lines and light-emitting elements. This intermediary structure manages voltage distribution and prevents direct contact between conductive layers at different potentials, thereby eliminating corrosion conditions
2Reliability
If Cu material is used for conductive layers to reduce resistance, then electrical conductivity is improved, but susceptibility to electrochemical corrosion increases
Solution Approach 1:
By maintaining equipotential conditions through the common voltage line architecture, the patent eliminates the voltage differential that would otherwise cause electrochemical corrosion of Cu conductive layers, allowing Cu to be used for its excellent conductivity without corrosion penalties
Solution Approach 2:
The patent converts the potential harm of Cu corrosion into a benefit by designing the circuit architecture to eliminate corrosion conditions entirely, allowing the use of Cu's superior electrical conductivity properties without suffering from its corrosion vulnerability
3Power
If multiple element groups are connected to different driving voltage lines, then voltage distribution is optimized, but exposure to water and oxygen increases
Solution Approach 1:
The patent transitions from a planar arrangement to a multi-layer vertical structure, organizing conductive layers and light-emitting elements in three-dimensional space. This dimensional change allows optimized voltage distribution across layers while reducing the lateral exposure area to water and oxygen
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
The solution effectively reduces the impact of electrochemical corrosion, enhancing the light-emitting stability and longevity of the substrate by protecting the conductive layers and maintaining stable electrical connections, thereby improving the overall performance and reliability of the substrate.
Implementation Method 1
a plurality of light-emitting components arranged on one side, away from the substrate, of the first conductive layer, where each of the plurality of light-emitting components includes a plurality of light-emitting elements
Data Source
AI summary
Disclosed are a light-emitting substrate and a display device. The light-emitting substrate includes a substrate; a first conductive layer arranged on the substrate, the first conductive layer including a plurality of driving voltage lines arranged at intervals; and a plurality of light-emitting components arranged on one side, away from the substrate, of the first conductive layer, each of the light-emitting components including a plurality of light-emitting elements, the plurality of light-emitting elements being divided into a plurality of element groups, and in the same light-emitting component, at least two element groups being electrically connected to different driving voltage lines.