Pixel Electrode Slit Design for LCD Viewing Angle
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Solution Overview
Problem
Conventional MVA mode liquid crystal display panels suffer from poor display quality due to asymmetric arrangement of liquid crystal molecules, resulting in discrepant brightness across pixels when displaying the same gray-level image, which limits their viewing angle and overall performance.
Innovation Solution
A pixel structure with a pixel electrode divided into alignment domains, where each domain contains a majority of first alignment slits of equal length and at least one second alignment slit longer than the first, allowing for symmetric and controlled tilt directions of liquid crystal molecules, ensuring uniform brightness across each pixel.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If alignment slits are symmetrically arranged in conventional MVA mode, then the viewing angle is improved, but the liquid crystal molecules are arranged asymmetrically causing discrepant brightness across pixels
Solution Approach 1:
The patent applies asymmetry by making the second alignment slit longer than the first alignment slit within each alignment domain. This asymmetric design within domains compensates for the overall symmetric arrangement, enabling symmetric liquid crystal molecule arrangement across pixels while maintaining wide viewing angle. The different lengths create different tilt directions that achieve symmetry at the pixel level.
2Adaptability or versatility
If alignment protrusions and alignment slits are used to control liquid crystal tilt directions, then the viewing angle is increased, but the liquid crystal molecules become asymmetrically arranged resulting in poor display quality
Solution Approach 1:
The patent applies local quality by creating different alignment slit lengths (first and second alignment slits with different lengths) within specific alignment domains. This local variation in slit length controls the tilt directions of liquid crystal molecules in different regions, enabling symmetric arrangement across pixels and improving display quality while maintaining wide viewing angle through the overall multi-domain structure.
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
The proposed pixel structure effectively controls the tilt directions of liquid crystal molecules, achieving uniform brightness across pixels and enhancing display quality while maintaining a wide viewing angle.
Implementation Method 1
the alignment structure 30 controls the liquid crystal molecules in different domains to tilt in different directions
Data Source
AI summary
A pixel structure including an active device and a pixel electrode is provided. The pixel electrode is electrically connected with the active device and has a plurality of alignment domains. Each of the alignment domains of the pixel electrode has one group of alignment slits parallel with one another, wherein each group of the alignment slits includes a plurality of first alignment slits with a first length and the first alignment slits are majority of each group of the alignment slits. At least one group of the alignment slits includes at least a second alignment slit with a second length longer than the first length of the first alignment slits.