Array Substrate Segmentation for VA Display Color Cast
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Solution Overview
Problem
In Vertical Alignment (VA) display modes, severe color cast phenomena occur due to varying refractive indices of liquid crystal molecules under different viewing angles, and existing Multi-domain Vertical Alignment (MVA) and Patterned Vertical Alignment (PVA) technologies face challenges in minimizing color shift without increasing the number of display domains.
Innovation Solution
The design of an array substrate with sub-pixels arranged in rows and columns, where each sub-pixel comprises two portions connected to different gate lines but share the same data line, allowing for the application of distinct data voltages to achieve different liquid crystal deflection angles and orientations, thereby enhancing multi-domain display and compensating for color cast.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If multiple display domains are designed to compensate color cast in MVA and PVA technologies, then color uniformity is improved, but device structure becomes more complex
Solution Approach 1:
Each sub-pixel is divided into two portions (first sub-pixel portion and second sub-pixel portion), with each portion having its own thin film transistor and pixel electrode. This segmentation allows independent voltage control of different portions, enabling multi-domain display and color cast compensation without requiring complex physical structures across the entire pixel array
Solution Approach 2:
Different portions of the same sub-pixel are assigned different liquid crystal deflection angles through independent voltage control. The first sub-pixel portion and second sub-pixel portion can have different data voltages applied, creating local variations in liquid crystal orientation that compensate for viewing angle-dependent color shifts
2Manufacturing precision
If dual-TFT technology is adopted with different TFT arrangement modes, then color cast compensation is improved, but manufacturing complexity increases
Solution Approach 1:
The sub-pixel is segmented into two portions, each with its own TFT (first thin film transistor and second thin film transistor). This allows independent control of liquid crystal deflection in different portions, achieving color cast compensation through electrical control rather than complex physical structures
Solution Approach 2:
Different data voltages are applied to the first and second pixel electrodes through the respective TFTs, changing the electrical parameters to control liquid crystal deflection angles. This enables dynamic adjustment of liquid crystal orientation to compensate for color cast without requiring complex TFT arrangement modes
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 approach enables improved color uniformity and display quality by allowing for different inversion manners and deflection angles within the same sub-pixel, effectively reducing color cast and enhancing the overall picture quality.
Implementation Method 1
allowing for the application of distinct data voltages to achieve different liquid crystal deflection angles and orientations
Data Source
AI summary
An array substrate, a display device and a driving method for a display device are provided. In the array substrate and the display device, one sub-pixel includes a first sub-pixel portion and a second sub-pixel portion adjacent to each other. The first sub-pixel portion and the second sub-pixel portion are connected to different gate lines and are electrically connected to the same data line, so that, in the case of progressive scanning, the first sub-pixel portion and the second sub-pixel portion are applied with different data voltages.