Electrostatic Protection Circuit Ground Wire Loop Design
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Solution Overview
Problem
Existing electrostatic protection circuits in display panels have limited paths for discharging static electricity, resulting in poor electrostatic discharging efficiency and potential damage to the display panel.
Innovation Solution
An electrostatic protection circuit with multiple ground wires forming loops with a printed circuit board, where each ground wire is in a different layer of the thin film transistor, and connected through via holes, increasing the number of discharge paths without adding complexity to the manufacturing process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a single ground wire is provided in the peripheral region to form a loop with the printed circuit board, then the structure is simple, but the electrostatic discharging capability is insufficient
Solution Approach 1:
The ground wire structure is segmented into multiple independent ground wires (first ground wire, second ground wire, third ground wire) located at different positions in the peripheral region. Each ground wire forms a separate loop with the printed circuit board, creating multiple parallel discharge paths that collectively enhance electrostatic discharging capability while maintaining reasonable structural complexity
Solution Approach 2:
The patent extends the ground wire arrangement from a single-plane configuration to a multi-dimensional layout by positioning ground wires at different locations around the peripheral region and connecting them to different ground pins on the printed circuit board. This spatial distribution creates multiple discharge paths that cover different areas, improving overall electrostatic protection
2Reliability
If multiple ground wires are added to increase discharge paths, then the electrostatic discharging capability improves, but the manufacturing complexity increases
Solution Approach 1:
Multiple ground wires are merged into a unified electrostatic protection system that shares common connection points with the printed circuit board. The ground wires are integrated with the existing peripheral region structure and connected through shared ground pins, allowing multiple discharge paths to be achieved without proportionally increasing manufacturing complexity
Solution Approach 2:
The ground wires serve multiple functions: they provide electrostatic discharge paths, form protective loops around the display region, and connect to the printed circuit board through standard ground pins. This multi-functionality allows the same structural elements to achieve multiple objectives, reducing the need for additional specialized components
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
Enhances the electrostatic discharging capacity by providing multiple paths for static electricity discharge, thereby improving the protection of the display panel from static electricity damage.
Implementation Method 1
The first ground wire forms a first loop with a printed circuit board provided within the peripheral region, and the first loop surrounds the display region; and the second ground wire forms a second loop with the printed circuit board, and the second loop surrounds the display region
Data Source
AI summary
An electrostatic protection circuit, an array substrate, a display panel and a display device are disclosed. The electrostatic protection circuit is located within a peripheral region of an array substrate and includes: a first ground wire provided in a same layer as a source electrode and a drain electrode of a thin film transistor located within a display region of the array substrate; and a second ground wire provided in a same layer as a gate electrode of the thin film transistor, wherein, the first ground wire forms a first loop with a printed circuit board provided within the peripheral region, the first loop surrounds the display region; the second ground wire forms a second loop with the printed circuit board, and the second loop surrounds the display region.