Array Substrate Multi-Angle Viewing via Transistor Charging
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Solution Overview
Problem
Existing liquid crystal display devices have a limited viewing angle due to uniform deflection angles of liquid crystal molecules in each pixel unit, restricting the range from which a normally displayed image can be observed.
Innovation Solution
The array substrate incorporates pixel units with a first and second sub-pixel electrode, each connected to a thin film transistor with varying charging abilities, allowing for different deflection angles of liquid crystal molecules by adjusting the width-to-length ratio and carrier mobility of the transistors, thereby enhancing the viewing angle.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If each pixel unit uses the same structure with uniform charging ability, then the manufacturing process is simple and consistent, but the viewing angle is limited due to single deflection angle of liquid crystal molecules
Solution Approach 1:
Each pixel unit is segmented into multiple sub-pixel electrodes (first, second, third, fourth sub-pixel electrodes) with different charging abilities. This segmentation allows different regions of the same pixel to drive liquid crystal molecules to different deflection angles, thereby expanding the viewing angle without requiring fundamentally different pixel structures
Solution Approach 2:
Different sub-pixel electrodes within the same pixel unit are assigned different charging abilities through varying transistor parameters (width-to-length ratios). This creates local quality differences where each sub-region has optimized characteristics for specific viewing directions, enabling multi-angle display performance while maintaining overall structural consistency
2Adaptability or versatility
If multiple sub-pixel electrodes with different charging abilities are introduced in each pixel unit, then the viewing angle is enhanced through multiple deflection angles, but the device structure and manufacturing complexity increase
Solution Approach 1:
The invention achieves different charging abilities by changing the electrical parameters of transistors - specifically the width-to-length ratios of their channels. This parameter-based differentiation allows multiple sub-pixel electrodes with distinct charging characteristics to be manufactured using the same fabrication process, avoiding the need for complex multi-step manufacturing while achieving the desired functional diversity
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 configuration increases the viewing angle of the liquid crystal display device by enabling liquid crystal molecules to deflect at multiple angles, allowing a normal image to be observed from various directions without deteriorating the display effect.
Implementation Method 1
by electric fields formed between the pixel electrodes and the common electrodes, deflection of liquid crystal molecules in liquid crystal regions corresponding to the pixel units are controlled
Implementation Method 2
deflection of liquid crystal molecules in liquid crystal regions corresponding to the pixel units are controlled so as to achieve a liquid crystal display function
Data Source
AI summary
An array substrate, a manufacturing method therefor, and a display device are provided. The array substrate comprises multiple pixel units, where at least one of the pixel units comprises a first subpixel electrode and a second subpixel electrode, the first subpixel electrode is electrically connected to a first charging thin-film transistor, and the second subpixel electrode is electrically connected to a second charging thin-film transistor. In same one pixel unit, the charging capacity of the second charging thin-film transistor is greater than the charging capacity of the first charging thin-film transistor.