Display Panel Multi-Domain Alignment via Segmented Electrodes
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Solution Overview
Problem
Existing thin film transistor liquid crystal displays (TFT-LCDs) face challenges in achieving wide viewing angles while maintaining a high aperture ratio, as increasing the alignment domains on the vertical plane requires additional transistors, which reduces the pixel aperture ratio.
Innovation Solution
A display panel design featuring a first pixel electrode with insulated voltage parts on a color filter substrate, allowing for multiple voltage applications across sub-pixels without adding additional transistors, enabling liquid crystal molecules to deflect at various angles on a vertical plane without reducing the aperture ratio.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If additional TFTs (sub-TFT and sharing-TFT) are added to apply different voltages to partitions of the pixel electrode, then the alignment domains increase from four to eight, but the pixel aperture ratio is reduced
Solution Approach 1:
The pixel electrode is segmented into multiple independent voltage parts (first voltage part and second voltage part) that can be controlled separately. This segmentation allows different voltage parts to apply different voltages to deflect liquid crystal molecules in different directions, achieving multiple alignment domains without adding additional TFTs, thus resolving the contradiction between increasing alignment domains and maintaining aperture ratio
Solution Approach 2:
The invention transitions from controlling alignment domains only on the horizontal plane to controlling them on both horizontal and vertical planes. By applying different voltages to different voltage parts of the pixel electrode, the liquid crystal molecules can be deflected in multiple directions including vertical angles, effectively increasing alignment domains from four to eight or more without requiring additional transistors
2Adaptability or versatility
If the pixel electrode is divided into two independent areas with different voltages to increase alignment domains, then viewing angles are improved, but additional TFTs are required which reduces aperture ratio
Solution Approach 1:
The pixel electrode is designed to serve multiple functions: it acts as both a single electrode for basic voltage application and as a multi-part electrode for differential voltage control. By making different parts of the same pixel electrode independently controllable, the system achieves multi-domain alignment and wide viewing angles without requiring separate dedicated control transistors for each domain, thus maintaining high aperture ratio while improving viewing angles
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 design enhances the display's viewing angles by increasing alignment domains without compromising the aperture ratio, resulting in improved display performance with high resolution, contrast, brightness, and wide viewing angles.
Implementation Method 1
orient liquid crystal molecules toward multiple directions on a vertical plane
Implementation Method 2
applying different voltages thereon, four alignment domains will increase to be eight alignment domains
Data Source
AI summary
A display panel and a display device are provided. The display panel includes an array substrate, a color filter substrate disposed opposite to the array substrate, and a liquid crystal layer disposed between the color filter substrate and the array substrate. Through applying voltages at different partitions on a side of a color filter substrate, liquid crystal molecules have different deflection angles at different voltage parts, which can arrange the liquid crystal molecules in multiple directions on a vertical plane, ensuring high aperture ratio, and improving display viewing angles of the display device while increasing alignment domains.