Display Substrate Anti-Static Resistor Layout for Peripheral ESD Dissipation
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Solution Overview
Problem
Display substrates, such as OLED and liquid crystal display substrates, are prone to damage from static electricity accumulation during manufacturing, which can be mitigated by incorporating anti-static components but require careful integration to prevent interference with existing circuitry and electrode structures.
Innovation Solution
The display substrate incorporates anti-static wires and resistors connected to ground bonding pads, with specific layering and via hole configurations to dissipate static electricity while maintaining electrical connectivity, and includes anti-static electrodes and capacitors to enhance static charge management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If anti-static wires and resistors are added to the display substrate, then static electricity protection is improved, but device complexity increases
Solution Approach 1:
The anti-static resistor is integrated within the same layer as the transistor active layer, nesting the anti-static function within the existing layer structure rather than adding separate layers. This reduces overall device complexity while maintaining static protection functionality.
Solution Approach 2:
The anti-static wire is configured to surround multiple display regions and connect to multiple ground bonding pads, making a single anti-static wire structure serve multiple protection functions across different regions of the display substrate.
2Ease of manufacture
If anti-static components are integrated at the same layer as transistor active layer, then manufacturing process is simplified, but risk of interference with circuitry increases
Solution Approach 1:
The anti-static resistor is positioned specifically in the non-display region rather than throughout the entire substrate, concentrating the anti-static function only where needed while leaving the display region circuitry unaffected. This localized approach prevents interference with functional circuitry.
Solution Approach 2:
The anti-static wire acts as an intermediary element that connects the anti-static resistor in the non-display region to the ground bonding pads, providing a dedicated path for static discharge that is electrically isolated from the signal paths in the display region.
3Reliability
If anti-static wire surrounds the entire display region, then static protection coverage is improved, but available area for display content is reduced
Solution Approach 1:
The anti-static wire is positioned exclusively in the non-display region surrounding the display area, providing comprehensive static protection while keeping the central display region fully available for visual content. The anti-static function is localized to the peripheral region.
Solution Approach 2:
The anti-static protection is arranged in a dimensional configuration where the wire forms a peripheral boundary structure, separating the protection function into the surrounding region while preserving the internal display area for its intended purpose.
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 dissipates static charges to the ground, reducing damage to the display substrate and enhancing protection against external static electricity, while maintaining the integrity of the display region's circuitry.
Implementation Method 1
a first terminal of the first anti-static resistor is electrically connected to a first end of the anti-static wire, and a second terminal of the first anti-static resistor is electrically connected to the first ground bonding pad
Implementation Method 2
an anti-static wire surrounding boundaries of the display region
Data Source
AI summary
The present disclosure provides a display substrate and a display device. The display substrate includes a base substrate, and a transistor, an anti-static wire, a first anti-static resistor and a first ground bonding pad on the base substrate, wherein a first terminal of the first anti-static resistor is electrically connected to a first end of the anti-static wire, a second terminal of the first anti-static resistor is electrically connected to the first ground bonding pad, and the first anti-static resistor is at a different layer from a layer at which the anti-static wire is located and a layer at which the first ground bonding pad is located, and is at a same layer as an active layer of the resistor.