TFT Array Substrate Common Electrode Resistance Reduction
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Solution Overview
Problem
Existing liquid crystal display (LCD) technologies face challenges in reducing the resistance of common electrodes and preventing electric field interference between pixel electrodes, which affects the storage capacity and overall performance of the display panel.
Innovation Solution
The implementation of a TFT array substrate with a second common electrode and resistance reduction portions, made of transparent conductive materials, which are electrically connected to the first common electrodes and pixel electrodes, reducing resistance and enhancing storage capacity while minimizing electric field interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a single common electrode is used, then the structure is simple, but the resistance is high and electric field interference occurs
Solution Approach 1:
The common electrode is divided into multiple segments (first common electrode and second common electrode) that are spatially separated and independently controlled. This segmentation reduces the resistance of each electrode segment while maintaining the overall common electrode function, and allows for reduced electric field interference between adjacent pixel electrodes through strategic positioning of the segmented electrodes.
Solution Approach 2:
A bridge electrode is introduced as an intermediary element to electrically connect the first common electrode and the second common electrode. This bridge electrode serves as a mediator that enables current flow between the segmented common electrodes while maintaining their spatial separation, thus achieving both low resistance and reduced electric field interference.
2Reliability
If the common electrode resistance is reduced by increasing electrode area, then resistance decreases, but the device area increases
Solution Approach 1:
The bridge electrode is positioned specifically in the gap region between the first and second common electrodes, concentrating the electrical connection function in a localized area. This allows the common electrodes to maintain low resistance through the bridge connection without requiring an increase in the overall display panel area, as the connection is achieved locally rather than by expanding electrode areas.
Solution Approach 2:
The bridge electrode extends in a direction that bridges the gap between the first and second common electrodes, utilizing the spatial dimension between them to create an electrical connection. This dimensional approach allows for resistance reduction through extended conduction paths without increasing the planar area of the display panel.
Data Source
AI summary
A thin film transistor (TFT) array substrate includes a plurality of data lines, at least one first common electrode, and at least one resistance reduction structure. The resistance reduction structure is connected to the first common electrodes and located corresponding to one of the data lines.