Display Substrate Redundant Line for Static Discharge
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Solution Overview
Problem
Existing display technologies face challenges in effectively managing static electricity during the manufacturing process of display substrates, which can lead to breakdowns in the active layers of thin film transistors and affect the display performance.
Innovation Solution
The introduction of a redundant line electrically connected to the second electrodes of storage capacitors in the display substrate provides a mesh structure for discharging static electricity, preventing it from reaching the display area and reducing the risk of active layer breakdown.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a redundant line is added to discharge static electricity, then the reliability of the display substrate is improved, but the device complexity increases
Solution Approach 1:
The redundant line serves as an intermediary conductor that provides a dedicated discharge path for static electricity. By introducing this intermediate conductive structure between the storage capacitor and the common electrode, static electricity is channeled away from sensitive components without requiring fundamental changes to the display substrate architecture.
Solution Approach 2:
The redundant line performs multiple functions: it serves as both a structural component of the display substrate and a static electricity discharge path. The same conductive layer that forms part of the electrode structure also functions as the discharge pathway, eliminating the need for completely separate protective components.
2Reliability
If the second electrode of storage capacitor is extended to transition area, then static electricity discharge capability is improved, but the manufacturing precision requirements increase
Solution Approach 1:
The second electrode of the storage capacitor is pre-designed to extend into the transition area during the manufacturing process. This preliminary positioning ensures that the discharge path is already in place before the display substrate is assembled, allowing static electricity to be discharged through the planned route without requiring post-manufacturing adjustments.
Solution Approach 2:
By extending the second electrode into the transition area and connecting it to the redundant line, the patent creates an equipotential region that safely channels static electricity. The extended electrode structure ensures that potential differences are distributed along a controlled path, reducing the risk of sudden discharge damage while maintaining manufacturability.
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 solution effectively discharges static electricity through the redundant line and storage capacitor mesh structure, enhancing the reliability and performance of the display substrate by preventing static-induced damage to the thin film transistors.
Implementation Method 1
at least part of second electrodes of storage capacitors extend from the display area to the transition area and are electrically connected with the redundant line
Data Source
AI summary
The present disclosure provides a display substrate and a display device: The display substrate has a display area, an edge area arranged on at least one side of the display area, and a transition area arranged between the display area and the edge area, the display substrate includes: a base substrate, a plurality of sub-pixels and a redundant line located on the base substrate, the plurality of sub-pixel being arranged in an array in the display area, the redundant line extending along a column direction of the sub-pixels and passing through the transition area; each sub-pixel includes: a pixel driving circuit; the pixel driving circuit includes a storage capacitor; at least a part of second electrodes of storage capacitors extend from the display area to the transition area and are electrically connected with the redundant line.