TFT Display Plate Storage Electrode Line Gate Load Reduction
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Solution Overview
Problem
Conventional liquid crystal displays (LCDs) face challenges with increased load on gate lines due to storage capacitors, leading to signal delay, and require large black matrices to prevent light leakage, which decreases the aperture ratio and luminance.
Innovation Solution
The implementation of a TFT display plate with a separate storage electrode line and a floating bar to form a storage capacitor, reducing the load on gate lines and minimizing the area of the black matrix, thereby enhancing the aperture ratio and preventing light leakage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a storage capacitor is connected to a previous gate line according to the conventional previous gate scheme, then the storage capacitor can store data voltage, but the load on the gate line increases causing signal delay
Solution Approach 1:
The invention segments the gate line function by introducing a separate storage electrode line that is electrically isolated from the gate line. The storage capacitor is formed between the pixel electrode and the storage electrode, with the storage electrode connected to the storage electrode line. This segmentation allows the gate line to focus on signal transmission while the storage electrode line handles storage capacitor connections, thereby reducing the load on the gate line and preventing signal delay.
2Object-affected harmful factors
If a black matrix with large area is formed on the common electrode display plate to prevent light leakage around data lines, then light leakage is prevented, but the aperture ratio decreases leading to degraded luminance
Solution Approach 1:
The invention addresses light leakage by extending the black matrix in the row direction (along the gate line) rather than only in the column direction (around data lines). This dimensional change allows the black matrix to effectively block light leakage paths while occupying less area, thereby preventing light leakage without significantly reducing the aperture ratio and maintaining luminance.
Data Source
AI summary
A thin film transistor (“TFT”) display plate, capable of reducing a load on a gate line, increasing an aperture ratio and preventing light leakage, includes an insulating substrate, a gate line formed on the insulating substrate, a storage electrode line spaced apart from the gate line and formed on an insulating substrate, a data line insulated from the gate line and the storage electrode line and intersecting the gate line, a pixel electrode formed for each pixel defined by the gate line and the data line, a thin film transistor (“TFT”) connected to the gate line and the data line to apply a voltage to the pixel electrode, and a storage electrode formed on the same layer as the data line and connected to the storage electrode line to form one terminal of a storage capacitor along with the pixel electrode as the other terminal of the storage capacitor.