Array Substrate With Segmented Subpixel Electrodes For Multi-Domain Display
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Solution Overview
Problem
Vertical-aligned liquid crystal displays with 8-domain alignment require complex wiring structures, leading to a decreased aperture ratio due to the need for charge sharing between adjacent gate lines, which complicates the array substrate design.
Innovation Solution
The array substrate incorporates a pixel region with a first and second subpixel electrode, each connected to a thin film transistor, and storage capacitors with different capacitances to maintain voltages, allowing for multi-domain display without increasing the complexity of the wiring structure and maintaining the aperture ratio.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If charge sharing manner is used to realize 8-domain liquid crystal alignment, then multi-domain display is achieved, but wiring structure becomes complicated and aperture ratio decreases
Solution Approach 1:
The pixel electrode is divided into multiple subpixel electrodes (first subpixel electrode, second subpixel electrode, etc.) that are insulated from each other. Each subpixel electrode is controlled by an independent thin film transistor, allowing different voltage applications to different segments of the pixel to achieve multi-domain liquid crystal alignment without requiring complex gate line wiring.
Solution Approach 2:
The patent transitions from the conventional charge sharing method using adjacent gate lines to a method using multiple subpixel electrodes within the same pixel. This dimensional change in control architecture allows multi-domain display to be achieved through intra-pixel electrode segmentation rather than inter-pixel gate line coordination, simplifying the overall wiring structure.
2Adaptability or versatility
If charge sharing manner is used to realize 8-domain liquid crystal alignment, then multi-domain display is achieved, but aperture ratio of the pixel is decreased
Solution Approach 1:
The storage capacitor is integrated within the pixel region alongside the subpixel electrodes and thin film transistors. By merging the storage capacitor function into the pixel structure rather than requiring separate external wiring, the design maintains high aperture ratio while achieving multi-domain display capability through the subpixel electrode configuration.
3Device complexity
If multiple subpixel electrodes with different capacitance storage capacitors are used, then multi-domain display is achieved with simple structure, but manufacturing precision requirements increase
Solution Approach 1:
Different capacitance values are achieved by making the storage capacitors have different local characteristics (different areas or configurations) rather than requiring precise global control. The first storage capacitor has a different area than the second storage capacitor, creating different capacitance values through geometric differentiation rather than requiring precise material or dimensional control, thus reducing manufacturing precision requirements.
Data Source
AI summary
The present disclosure discloses an array substrate and a display device. A pixel electrode of the array substrate includes a first subpixel electrode and a second subpixel electrode, and a storage capacitor includes a first storage capacitor and a second storage capacitor, wherein the first storage capacitor is configured to maintain a voltage difference between the first subpixel electrode and the common electrode line, the second storage capacitor is configured to maintain a voltage difference between the second subpixel electrode and the common electrode line, and the first storage capacitor and the second storage capacitor have different capacitances.