Array Substrate Second Common Electrode Line Resistance Uniformity
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Solution Overview
Problem
In liquid crystal display apparatuses, the coupling capacitance between gate and data lines affects the common electrode, leading to defects like afterimages and crosstalk due to poor resistance uniformity of longitudinal common electrodes, which are exacerbated by narrowing product frames and increased wiring resistance.
Innovation Solution
The addition of a second common electrode line in a perpendicular direction, formed in the same layer as the gate and first common electrode lines with the same conductive material, and directly connected to improve resistance uniformity without increasing manufacturing costs, while maintaining aperture ratio.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a second common electrode line is added in the longitudinal direction, then the uniformity of common electrode resistance is improved, but the device complexity increases
Solution Approach 1:
The patent merges the second common electrode line with the gate line structure, forming them in the same layer using the same conductive material. This integration approach improves common electrode resistance uniformity while avoiding significant increases in device complexity, as the merged structure shares fabrication processes and material layers.
Solution Approach 2:
The patent introduces a longitudinal common electrode line (second common electrode line) extending in the vertical direction, complementing the existing lateral common electrode line. This dimensional addition creates a grid-like network that improves resistance uniformity across the display panel without requiring complete structural redesign.
2Shape
If the frame is narrowed to improve product design, then the aesthetic and compactness are improved, but the wiring resistance increases and defects worsen
Solution Approach 1:
By adding the longitudinal second common electrode line that extends vertically through the display panel, the patent provides an additional current path dimension. This compensates for the increased wiring resistance caused by narrower frames, maintaining resistance uniformity despite reduced lateral spacing.
Solution Approach 2:
The patent segments the common electrode connection into multiple independent paths: lateral connection through the first common electrode line and longitudinal connection through the second common electrode line. This segmentation provides redundant current paths, reducing the impact of increased resistance from narrowed frames.
3Ease of manufacture
If the first and second common electrode lines are formed in the same layer with the same material, then manufacturing cost is reduced, but the manufacturing precision control becomes more difficult
Solution Approach 1:
The patent combines the formation of the first common electrode line and second common electrode line into a single fabrication step within the same layer, using the same conductive material. This merging approach reduces manufacturing cost by eliminating additional deposition processes while the orthogonal arrangement maintains resistance uniformity control.
Solution Approach 2:
By using the same conductive material and fabrication process for both common electrode lines, the patent ensures homogeneous electrical properties throughout the network. This homogeneity simplifies manufacturing control while maintaining consistent resistance characteristics across different directions.
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 enhances the uniformity of common electrode resistance, effectively reducing defects such as afterimages and crosstalk, even in narrower frames, by forming a network of common electrode lines.
Implementation Method 1
a second common electrode line extending in the second direction, and common electrodes in which the common electrodes at both sides of and adjacent to the second common electrode line are electrically connected to the second common electrode line
Data Source
AI summary
Embodiments of the disclosure provide an array substrate, a manufacturing method for an array substrate, a display panel, and a display apparatus. The array substrate according to one embodiment including a gate line extending in a first direction, a data line extending in a second direction different from the first direction, a first common electrode line extending in the first direction, a second common electrode line extending in the second direction, and common electrodes in which the common electrodes at both sides of and adjacent to the second common electrode line are electrically connected to the second common electrode line.