Array Substrate With Segmented Electric Field Units For VA Display Color Shift
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Solution Overview
Problem
TFT-LCDs using vertical alignment mode suffer from color shift due to different transmittances at various viewing angles, which affects display quality.
Innovation Solution
An array substrate with pixel units comprising electric field unit groups having different electric field intensities, achieved by varying distances and inclination angles of pixel electrodes relative to common electrodes, ensuring distinct liquid crystal alignments and maximizing transmittance across different directions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If vertical alignment mode is used to achieve high contrast, then contrast ratio is improved, but color shift occurs due to different transmittances at different viewing angles
Solution Approach 1:
The pixel electrode is divided into multiple independent electric field units, each capable of independently controlling liquid crystal alignment in its region. This segmentation allows different parts of the same pixel to have different alignment characteristics, enabling high contrast while compensating for viewing angle effects through localized control
Solution Approach 2:
Different electric field units within the pixel are assigned different electrode configurations (different distances or inclination angles), creating local variations in electric field intensity. This local quality differentiation enables each region to optimize for specific viewing directions, collectively eliminating color shift while maintaining high contrast
2Device complexity
If a single electrode configuration is used in each pixel, then device complexity is reduced, but transmittance cannot be maximized across different viewing directions
Solution Approach 1:
The pixel electrode is segmented into multiple electric field units with different configurations optimized for different viewing angles. This segmentation enables multi-directional light transmittance optimization without requiring complex external optical components
Solution Approach 2:
The pixel electrode serves multiple functions simultaneously by incorporating different electric field unit configurations within the same pixel. Each configuration targets specific viewing directions, making the single pixel structure universally effective across multiple viewing angles
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 eliminates color shift by allowing liquid crystals to align differently in each pixel unit, ensuring consistent light transmittance across angles and enhancing display quality with improved brightness and reduced energy consumption.
Implementation Method 1
each of the pixel sub-units includes at least one electric field unit group; the electric field unit group includes a pixel electrode and a common electrode
Implementation Method 2
vertical alignment (VA) mode which adopts vertically aligned liquid crystal molecules
Data Source
AI summary
The present disclosure provides an array substrate, a liquid crystal module and a display device. The array substrate includes a plurality of pixel units. Each of the pixel units includes at least three pixel sub-units; each of the pixel sub-units includes at least one electric field unit group; the electric field unit group includes a pixel electrode and a common electrode; the first pixel sub-unit includes a first electric field unit group; the second pixel sub-unit includes a second electric field unit group corresponding to the first electric field unit group; the third pixel sub-unit includes a third electric field unit group corresponding to the first electric field unit group; the first electric field unit group, the second electric field unit group and the third electric field unit group have different electric field intensities.