Array Substrate Multi-Domain Pixel Arrangement for Viewing Angle
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Solution Overview
Problem
Traditional Fringe Field Switching (FFS) liquid crystal displays suffer from lower contrast ratio and chromatic aberration, especially at inclined viewing angles, due to their single-domain or double-domain structure pixel array configurations.
Innovation Solution
An array substrate with a unique pixel unit arrangement, where each first and third pixel unit has a single-domain inclining direction, and the second pixel unit has multiple domain inclining directions, with adjacent sides of the second pixel unit aligned with the single-domain directions of the first and third pixel units, respectively, and comb-like and plane-like electrodes are formed to align liquid crystal molecules without phase difference across viewing angles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a single-domain pixel structure is adopted, then light transmittance is improved, but contrast ratio deteriorates and chromatic aberration occurs at inclined viewing angles
Solution Approach 1:
The pixel electrode is divided into multiple regions with different inclining directions (first, second, third regions) to create multiple liquid crystal domains within a single pixel. This segmentation allows each region to maintain high transmittance while the combined effect improves contrast ratio and reduces chromatic aberration at inclined viewing angles.
Solution Approach 2:
Different regions of the pixel electrode are assigned different inclining directions to optimize local optical properties. The first region has a first inclining direction, the second region has a second inclining direction, and the third region has a third inclining direction, allowing each local area to contribute differently to the overall display performance.
2Reliability
If a double-domain pixel structure is adopted, then contrast ratio is improved, but viewing angle quality still deteriorates at inclined viewing angles
Solution Approach 1:
The pixel electrode is divided into three distinct regions with different inclining directions, extending the double-domain concept to a multi-domain structure. This creates first, second, and third liquid crystal domains that work together to maintain high contrast ratio while significantly improving viewing angle quality by distributing the optical response across multiple orientations.
Solution Approach 2:
The pixel electrode structure employs asymmetric region划分 with different inclining directions rather than simple symmetry. The first, second, and third regions have distinct orientations that are not merely mirror images, allowing optimized performance across multiple viewing angles through asymmetric light modulation.
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 improves the viewing angle and display quality by maintaining consistent transmittance and reducing chromatic aberration across different viewing angles, enhancing the contrast ratio and aperture ratio of the display device.
Implementation Method 1
forming a comb-like first electrode and a plane-like second electrode in each of the first to third pixel units, wherein the first electrode is inclinedly aligned for driving liquid crystal molecules to align according to a corresponding domain inclining direction
Data Source
AI summary
An array substrate has at least one array structure, the array structure having a first pixel unit, a second pixel unit and a third pixel unit arranged row-by-row; each of the first pixel unit and the third pixel unit has a single-domain inclining direction, and the second pixel unit has a plurality of domain inclining directions; the single-domain inclining direction of the first pixel unit is different from that of the third pixel unit; the domain inclining direction of the second pixel unit, at a side adjacent to the first pixel unit, is the same as the single-domain inclining direction of the third pixel unit, and the domain inclining direction of the second pixel unit, at a side adjacent to the third pixel unit, is the same as the single-domain inclining direction of the first pixel unit.