Display Substrate Tip Structure for Static Discharge Protection
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Solution Overview
Problem
Electronic paper display devices face static electricity issues during the removal of protective films, leading to potential damage of pixels and white spot defects due to high static electricity generation.
Innovation Solution
A display substrate design featuring a tip structure in the same layer as the upper electrode of the storage capacitor, which induces and releases static electricity, preventing breakdown of the gate insulating layer and damage to the lower electrode, thereby maintaining normal pixel display.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a protective film is coated on the array substrate after manufacturing, then the substrate is protected during manufacturing, but extremely high static electricity is generated during removal of the protective film which may damage pixels and cause white spot defects
Solution Approach 1:
The patent introduces a tip structure as an intermediary element that provides a controlled path for static electricity discharge. The tip structure includes a first tip sub-structure connected to the upper electrode and a second tip sub-structure connected to the lower electrode, creating a safe discharge pathway that prevents uncontrolled static electricity from damaging the pixel electrodes and gate insulating layer.
Solution Approach 2:
The patent converts the harmful static electricity into a beneficial controlled discharge mechanism. By designing the tip structure with specific geometry (tips with small radius of curvature), the static electricity is channeled through a controlled path that prevents damage to critical components, effectively transforming the harmful electrostatic discharge into a safe release mechanism.
2Reliability
If the tip structure is added to channel static electricity, then static electricity damage is prevented, but the device structure becomes more complex
Solution Approach 1:
The patent merges the tip structure with the existing capacitor electrode structure. The first tip sub-structure is integrated with the upper electrode, and the second tip sub-structure is integrated with the lower electrode, both located in the same layer. This merging approach allows the static electricity protection function to be added without significantly increasing structural complexity, as the tip structures share the same layers and materials as the capacitor electrodes.
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
The designed tip structure effectively channels and releases static electricity, preventing damage to pixels and ensuring the integrity of the display during both manufacturing and operation.
Implementation Method 1
A display substrate design featuring a tip structure in the same layer as the upper electrode of the storage capacitor, which induces and releases static electricity, preventing breakdown of the gate insulating layer and damage to the lower electrode
Data Source
AI summary
Disclosed are a display substrate and a display device. The display substrate includes: a base substrate; a plurality of gate lines and a plurality of data lines on the base substrate that intersect to surround a plurality of pixels; at least one thin film transistor on the base substrate and located in each pixel, each thin film transistor including a gate electrode, a first electrode and a second electrode; a storage capacitor on the base substrate and located in each pixel, the storage capacitor including a first capacitor electrode and a second capacitor electrode that are disposed oppositely and located in the same layer, wherein the first capacitor electrode comprises at least an electrode body; and a tip structure, the tip structure and the first capacitor electrode being located in the same layer, and the tip structure including a first tip sub-structure and a second tip sub-structure.