Flexible Display Panel Electrostatic Buffering via Integrated Capacitors
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Solution Overview
Problem
Flexible OLED display panels face damage from accumulated electrostatic charges during manufacturing, leading to erosion of film layers and signal transmission line damage, which affects yield rates and display quality.
Innovation Solution
Incorporating capacitors in the non-display region of the flexible display panel, where metal plates and gate electrodes are formed in the same layers and shapes, forming a capacitor to buffer electrostatic charges and prevent damage to metal wiring and film layers, without requiring additional processing steps.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional manufacturing processes are used for flexible OLED display panels, then production cost is reduced, but electrostatic charges accumulate during manufacturing causing erosion of film layers and signal transmission line damage
Solution Approach 1:
The patent combines the capacitor structure with existing gate electrode layers in the flexible display panel. Specifically, the first and second metal plates are integrated into the same layers as the first and second gate electrodes respectively, merging the electrostatic protection function with the existing transistor structure without adding separate capacitor components.
Solution Approach 2:
The metal plates in the non-display region serve dual purposes: they maintain the structural integrity of the gate electrode layers while simultaneously functioning as capacitor electrodes to buffer electrostatic charges. This multi-functional design protects signal transmission lines without requiring additional dedicated protection structures.
2Object-affected harmful factors
If capacitors are added to buffer electrostatic charges in the non-display region, then erosion of film layers is prevented, but manufacturing complexity increases
Solution Approach 1:
The capacitor electrodes (first and second metal plates) are formed in the same layers as the gate electrodes during the existing manufacturing process. This integration allows the capacitor structure to be created without adding separate fabrication steps, maintaining ease of manufacture while providing electrostatic protection.
Solution Approach 2:
The capacitor structure is built into the panel during the manufacturing process before the panel is put into service. The metal plates are positioned and formed in advance within the gate electrode layers, so that when electrostatic charges accumulate during operation, the protection mechanism is already in place and immediately effective.
3Reliability
If metal plates are positioned in the empty region of the non-display region, then electrostatic charges are buffered effectively, but device structure becomes more complex
Solution Approach 1:
The metal plates are positioned in the empty region of the non-display region but are integrated into the existing gate electrode layers. This merging approach allows effective electrostatic buffering in the optimal location without creating a separate structural arrangement, as the metal plates share the same layers and fabrication process as the gate 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
This solution effectively reduces damage from electrostatic charges, improves yield rates, and protects the display screen from damage during the manufacturing of flexible OLED panels, while maintaining cost-effectiveness by integrating the metal and gate electrodes within existing processes.
Implementation Method 1
a capacitor is formed between the first metal plate and the second metal plate
Implementation Method 2
the first metal plate and the second metal plate have a same thickness... a capacitor is formed between the first metal plate and the second metal plate
Data Source
AI summary
A flexible display panel includes a display region and a non-display region. Capacitors are added to an empty region of the non-display region. The capacitors have ability to buffer a release of electrostatic charges, thereby reducing damage to inner devices and metal wiring film layers caused by the electrostatic charges and protecting the metal wiring film layers from being damaged and destroyed by the electrostatic charges during manufacturing active thin-film transistors of the flexible display panel.