Array Substrate Electrostatic Discharge Circuit Segmentation
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Solution Overview
Problem
Existing array substrates for thin film transistor liquid crystal displays (TFT-LCDs) suffer from electrostatic discharge issues, leading to dielectric breakdown, short circuits, and threshold voltage shifts, which affect the quality of the displayed picture due to leakage currents when the electrostatic discharge circuit is turned off.
Innovation Solution
The array substrate design incorporates multiple groups of signal lines connected to common electrode sub-lines via electrostatic discharge circuits, with each common electrode sub-line connected to a common electrode line through additional discharge circuits, ensuring balanced charge distribution and minimizing leakage currents by providing multiple discharge paths and bidirectional electrostatic discharge devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an electrostatic discharge circuit is used to release static electricity, then the reliability of the TFT-LCD is improved, but leakage current is generated affecting picture quality
Solution Approach 1:
The common electrode line is divided into multiple common electrode sub-lines, and the electrostatic discharge circuit is segmented into multiple discharge paths. Each signal line group connects to a dedicated common electrode sub-line through separate discharge circuits, distributing the discharge current and reducing leakage current impact on picture quality while maintaining reliability.
2Object-affected harmful factors
If signal lines are connected to the common electrode line via electrostatic discharge circuits, then static electricity is released, but voltage fluctuations occur affecting display quality
Solution Approach 1:
The common electrode line is segmented into multiple sub-lines, each handling discharge from specific signal line groups. This segmentation isolates voltage fluctuations to individual sub-lines rather than affecting the entire common electrode line, maintaining voltage stability and display quality.
Solution Approach 2:
The electrostatic discharge circuits provide dynamic charge distribution, allowing static electricity to be released through multiple controllable paths. The bidirectional discharge capability enables adaptive charge balancing that responds to varying electrostatic conditions, stabilizing voltage levels during discharge operations.
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 disperses static electricity, preventing large leakage currents and voltage fluctuations, thereby maintaining the quality of the displayed picture by ensuring balanced charge distribution and reducing the impact of electrostatic discharge on the TFT-LCD.
Implementation Method 1
an electrostatic discharge circuit is usually used to release a high voltage static electricity produced during a manufacturing process or a working process
Implementation Method 2
bidirectional electrostatic discharge devices
Data Source
AI summary
The present disclosure provides an array substrate and a display apparatus. The array substrate comprises at least two groups of signal lines, a common electrode line and at least two common electrode sub-lines, at least one signal line of one group of the at least two groups of signal lines is connected to one common electrode sub-line of the at least two common electrode sub-lines via a first electrostatic discharge circuit, at least one signal line of another group of the at least two groups of signal lines is connected to another common electrode sub-line of the at least two common electrode sub-lines via a second electrostatic discharge circuit, each common electrode sub-line is respectively connected to the common electrode line via a third electrostatic discharge circuit.