Array Substrate Electro-Static Discharge Circuit Design
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Solution Overview
Problem
Conventional array substrates have a poor ability to resist electro-static damages, leading to short circuits and decreased product yield, especially during the cathode deposition process in organic electroluminescent display panel fabrication due to long electro-static discharge paths.
Innovation Solution
The array substrate incorporates a charge release signal line and power signal line disposed in parallel, with electro-static discharge units and short circuit ring units forming electro-static discharge circuits to quickly release static charges, ensuring timely discharge and reducing damage to adjacent lines.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional array substrate design is used, then device simplicity is maintained, but electro-static discharge ability is poor leading to short circuits
Solution Approach 1:
The electro-static discharge protection function is segmented into multiple independent units: electro-static discharge units connected to signal lines, short circuit ring units connected to power signal lines, and charge release signal lines. This segmentation allows each unit to independently handle discharge tasks, improving overall reliability without requiring a complete redesign of the substrate structure.
Solution Approach 2:
Charge release signal lines are introduced as intermediary elements that provide dedicated discharge paths between signal lines and power signal lines. These intermediaries enable controlled charge transfer without creating direct short circuits, thus protecting the substrate while maintaining functional integrity.
2Reliability
If long electro-static discharge paths are used, then discharge coverage is increased, but discharge time is extended causing more damage
Solution Approach 1:
The discharge path is segmented into multiple short sections through the introduction of charge release signal lines positioned between signal lines and power signal lines. This segmentation reduces the length of each discharge segment, enabling faster charge dissipation and reducing the time electro-static charges can cause damage to adjacent lines.
Solution Approach 2:
Charge release signal lines are pre-positioned in parallel with power signal lines before electro-static discharge occurs. This preliminary arrangement ensures that discharge paths are already established and optimized for speed, allowing immediate charge release when electro-static events occur during cathode deposition.
3Productivity
If electro-static discharge units are added to protect signal lines, then discharge efficiency is improved, but device complexity increases
Solution Approach 1:
The charge release signal lines serve multiple functions simultaneously: they act as discharge paths for electro-static protection, provide electrical connection between signal lines and power signal lines, and enable the short circuit ring units to function. This multi-functionality improves discharge efficiency without requiring separate dedicated structures for each function.
Solution Approach 2:
The electro-static discharge units and short circuit ring units are merged into a unified protection system where charge release signal lines serve both as discharge paths and as electrical interconnects. This merging reduces the need for separate protective structures, improving discharge efficiency while controlling the increase in device complexity.
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 configuration enhances the array substrate's resistance to electro-static damage, improving the efficiency and reliability of electro-static discharge, thereby increasing product yield and reducing display defects.
Implementation Method 1
two electro-static discharge units are disposed between the charge release signal line and the power signal line to form an electro-static discharge circuit
Data Source
AI summary
An array substrate, an electro-static discharge method thereof and a display device are disclosed. The array substrate includes: a plurality of data lines, a plurality of gate lines, a power signal line, a charge release signal line, a plurality of electro-static discharge units and at least one short circuit ring unit. The charge release signal line and the power signal line are disposed in parallel, two electro-static discharge units are disposed between them to form an electro-static discharge circuit, each gate line and/or each data line is connected with the charge release signal line by one electro-static discharge unit; the short circuit ring unit is connected between the charge release signal line and the power signal line.