Fan-out Wire Arrangement Reducing Coupling Capacitance
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Solution Overview
Problem
Existing fan-out wire arrangements in display panels suffer from excessive coupling capacitance due to small wire pitches, leading to instability and the formation of weak lines caused by resistance differences and etching rate variations.
Innovation Solution
Incorporating a dummy insulation wire at each first fan-out wire and strategically placing second fan-out wires between adjacent first fan-out wires, ensuring they are distributed side by side, with the same length and number, to reduce coupling capacitance and improve stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If fan-out wires have small wire pitches to reduce area, then area is reduced, but coupling capacitance increases causing lower stability
Solution Approach 1:
The patent introduces second fan-out wires as intermediary elements between adjacent first fan-out wires. This segmentation divides the direct coupling path into multiple segments, reducing the coupling capacitance between adjacent signal wires while maintaining the compact layout. The second fan-out wires act as isolation elements that break the direct capacitive coupling between first fan-out wires.
Solution Approach 2:
The second fan-out wires serve as intermediary elements between the first fan-out wires. These intermediary wires reduce the direct coupling capacitance between adjacent first fan-out wires by introducing additional isolation layers. The dummy insulation wires also function as intermediaries to further reduce coupling effects.
2Manufacturing precision
If dummy insulation wire is added to each first fan-out wire to maintain etching rate, then etching uniformity is improved, but device complexity increases
Solution Approach 1:
The dummy insulation wires serve multiple functions: they maintain etching uniformity by providing consistent surrounding environment for pattern etching, and they also contribute to reducing coupling capacitance between adjacent fan-out wires. This multi-functionality justifies the additional structural elements without proportionally increasing complexity.
Solution Approach 2:
The patent changes the physical parameters of the fan-out wire structure by introducing dummy insulation wires with specific dimensional parameters. The length and positioning of these dummy wires are optimized to achieve both etching uniformity and reduced coupling capacitance, transforming the structure to meet multiple performance requirements.
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 significantly reduces coupling capacitance, mitigating weak lines and enhancing the overall stability of the display panel by increasing the interval between dummy insulation wires and distributing load evenly.
Implementation Method 1
an etchant usually remains between fan-out wires to form coupling capacitance and cause lower stability of a display panel
Data Source
AI summary
Embodiments of the present application provide a fan-out wire arrangement and a display device. The fan-out wire arrangement includes a plurality of first fan-out wires and a plurality of second fan-out wires, a dummy insulation wire is disposed at each first fan-out wire, a preset quantity of second fan-out wires are disposed between every two adjacent first fan-out wires, and the plurality of first fan-out wires and the plurality of second fan-out wires are distributed side by side, so that coupling capacitance generated between adjacent fan-out wires is reduced, thereby improving the stability of a display panel.