Low-Resistance Common Electrode Network for Display Voltage Stability
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Solution Overview
Problem
Dual-gate thin film transistor liquid crystal displays suffer from voltage fluctuations due to high resistance in the common electrode, leading to display issues like flashing.
Innovation Solution
The array substrate design includes a third common electrode above the base, a second common electrode in the same layer as the gate lines, and a first common electrode in the same layer as the source/drain metal, with electrical connections between them to reduce resistance and prevent voltage fluctuations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a common electrode is used in dual-gate thin film transistor liquid crystal display, then the display device achieves low cost and competitive advantage, but the common electrode has large resistance causing voltage fluctuation and display quality degradation
Solution Approach 1:
The common electrode is divided into three separate common electrodes (first, second, and third common electrodes) located at different positions and layers. This segmentation allows each electrode to contribute to reducing overall resistance while maintaining the cost-effective dual-gate structure, thereby improving voltage stability without increasing manufacturing complexity
2Device complexity
If the common electrode layout is simplified to reduce manufacturing complexity, then production cost decreases, but the common electrode resistance increases causing signal interference and voltage fluctuation
Solution Approach 1:
The three common electrodes are positioned at different spatial locations and layers within the display structure. By utilizing the third dimension (depth/layers), the design reduces resistance and signal interference without increasing planar complexity, thus maintaining manufacturing simplicity while improving electrical performance
Data Source
AI summary
The present application provides an array substrate and a manufacturing method thereof, and a display device, to solve the problem in the prior art that the resistance of the common electrode is large due to an improper layout of the common electrode so that the common electrode is easily affected by other signals to cause voltage fluctuation and thus the quality of the display is influenced. In the array substrate and the manufacturing method thereof, and the display device provided in the present application, since the first common electrode is provided in the source/drain metal layer and the second and third common electrodes are further formed, connection of the first, second and third common electrodes effectively enables a low-resistance common electrode, which is not easily influenced by other signals to cause voltage fluctuation, therefore, the quality of the display can be improved.