Light-Emitting Substrate Insulation Layout Against Line Corrosion
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Solution Overview
Problem
The electrochemical corrosion between metal connection lines and common voltage lines in light-emitting substrates, caused by voltage differences, leads to potential short circuits and reduced light-emitting stability.
Innovation Solution
A light-emitting substrate design with specific voltage distribution and insulation layers to minimize electrochemical corrosion, including a first conductive layer with driving and common voltage lines, a second conductive layer with element wires, and insulation layers to protect against electrochemical reactions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If metal connection lines and common voltage lines are placed close together to reduce device area, then area is reduced, but electrochemical corrosion occurs due to voltage differences causing reliability to deteriorate
Solution Approach 1:
An insulation layer is introduced as an intermediary between the metal connection lines and common voltage lines. This insulation layer physically separates the two conductive elements that have voltage differences, preventing direct contact and the electrochemical corrosion that would otherwise occur, while still allowing the device to maintain a compact area.
Solution Approach 2:
The harmful electrochemical reaction pathway is extracted or removed from the system by introducing the insulation layer. This layer takes out the direct electrical and chemical interaction between the metal connection lines and common voltage lines, eliminating the corrosion mechanism while preserving the functional electrical connections.
2Reliability
If insulation layers are added to prevent electrochemical corrosion, then reliability is improved, but device complexity increases
Solution Approach 1:
A thin film insulation layer is used to protect against electrochemical corrosion. This thin film approach provides the necessary protection while minimizing the increase in device complexity and thickness, as the insulation layer is applied as a delicate coating rather than a bulky structural element.
Solution Approach 2:
The substrate structure becomes a composite material system combining the base substrate, metal connection lines, common voltage lines, and insulation layer. This composite structure integrates multiple materials with different properties (conductive metals and insulating material) to simultaneously achieve both electrical functionality and corrosion protection.
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.