Array Substrate Auxiliary Grounding Wire for Narrow Bezel ESD Protection
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Solution Overview
Problem
Display devices with narrow bezel designs face challenges in effectively preventing Electrostatic Discharge (ESD) due to the small width of the peripheral region, leading to high resistance and inadequate static electricity removal, which can affect the performance of internal components.
Innovation Solution
The array substrate incorporates a grounding wire in the peripheral region, accompanied by an auxiliary grounding wire, either in the source-drain metal layer or a transparent electrode layer, to reduce resistance and enhance ESD prevention, with the auxiliary wire being wider than the grounding wire and connected to it in parallel, and optionally includes an electrostatic ring for further protection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the peripheral region width is reduced to achieve narrow bezel design, then the appearance and display area are improved, but the grounding wire resistance increases and ESD prevention capability deteriorates
Solution Approach 1:
The grounding system is segmented into multiple parallel grounding wires instead of a single grounding wire. This segmentation allows the total grounding capacity to be distributed across multiple paths, reducing the resistance of each individual wire while maintaining overall ESD prevention capability. The multiple grounding wires are arranged in parallel within the peripheral region, enabling effective static electricity discharge even with reduced peripheral width.
Solution Approach 2:
Multiple grounding wires are merged in parallel to form a composite grounding system. By combining multiple grounding paths with lower individual resistance into a unified grounding network, the overall resistance is reduced while maintaining the narrow bezel design. The parallel configuration ensures that static electricity can be discharged through multiple simultaneous pathways.
2Area of stationary object
If the peripheral region width is reduced to achieve narrow bezel design, then the appearance is improved, but the grounding wire width is reduced and resistance increases
Solution Approach 1:
The grounding function is segmented across multiple wires instead of relying on a single wide wire. This allows each individual grounding wire to maintain sufficient width for low resistance while the collective arrangement fits within the reduced peripheral region. The segmentation enables optimization of both wire width and peripheral area utilization.
Solution Approach 2:
The grounding system transitions from a single-dimensional wide wire approach to a multi-dimensional parallel wire arrangement. By utilizing the vertical stacking and horizontal distribution of multiple thinner wires, the solution achieves equivalent or superior grounding performance within a smaller peripheral footprint, effectively adding dimensional complexity to solve the space-resistance trade-off.
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 effectively reduces the resistance for static electricity conduction, preventing ESD and ensuring better performance and reliability of the display device by providing a more efficient path for static discharge.
Implementation Method 1
a conductive layer structure, disposed over the gate insulating layer and including an auxiliary grounding wire located in the peripheral region. The auxiliary grounding wire is connected to the grounding wire.
Implementation Method 2
During the test and use of the display device, static electricity can cause many adverse effects (e.g., unstable display screen, display panel failure, etc.). Therefore, design to prevent ESD (Electrostatic Discharge) is important.
Data Source
AI summary
The present disclosure relates to an array substrate, a method for manufacturing the same, a display panel, and a display device. The array substrate includes: a gate metal layer, disposed on the substrate and the gate metal layer including a grounding wire located in the peripheral region; a gate insulating layer, at least covering the gate metal layer; and a conductive layer structure, disposed over the gate insulating layer and including an auxiliary grounding wire located in the peripheral region, wherein the auxiliary grounding wire is connected to the grounding wire. The present disclosure can prevent ESD more effectively.