Liquid Crystal Display Pixel Electrode Voltage Segmentation
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Solution Overview
Problem
Liquid crystal display devices face challenges in achieving satisfactory lateral visibility without significant reduction in light transmittance, as existing technologies struggle to optimize the arrangement of pixel electrodes and voltage applications to control liquid crystal molecule orientations effectively.
Innovation Solution
The proposed solution involves a specific arrangement of pixel electrodes with different voltage applications in liquid crystal display devices, where high and low voltages are alternately applied to pixel electrodes in a grid pattern, with each pixel having distinct electrode structures that control the domain directions of liquid crystal molecules, ensuring optimal lateral visibility and transmittance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If light transmittance is reduced to improve lateral visibility, then lateral visibility is improved, but light transmittance deteriorates
Solution Approach 1:
The pixel electrode is divided into multiple regions (first through fourth regions) with different electrode structures, each controlling liquid crystal molecules in specific domain directions. This segmentation allows different parts of the pixel to control light in different orientations, improving lateral visibility without requiring overall transmittance reduction
Solution Approach 2:
Different regions of the pixel electrode are assigned different electrode structures (e.g., first electrode structure in first and fourth regions, second electrode structure in second and third regions) to create local variations in liquid crystal alignment. This local quality differentiation enables targeted control of light transmission in specific directions, achieving good lateral visibility while maintaining high transmittance
2Illumination intensity
If pixel electrodes are arranged with different voltage applications to control liquid crystal orientations, then lateral visibility is improved, but device complexity increases
Solution Approach 1:
The pixel electrode employs asymmetric electrode structures in different regions (first electrode structure versus second electrode structure) to create non-uniform electric field distributions. This asymmetry enables control of liquid crystal molecules in different domain directions, achieving improved lateral visibility through a systematic yet relatively simple electrode design
Solution Approach 2:
The electrode structures are arranged in a periodic pattern across the display panel, with alternating regions of first and second electrode structures. This periodic arrangement simplifies the overall design by repeating a manageable pattern rather than requiring unique structures for each pixel, reducing device complexity while maintaining performance
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 provides improved lateral visibility and maintains satisfactory transmittance by ensuring that the gamma value for each gray level is satisfied, reducing the color separation defects and maintaining uniform luminance across the display.
Implementation Method 1
Applying a voltage to the field generating electrodes may control orientations of the liquid crystal molecules of the liquid crystal layer
Implementation Method 2
liquid crystal molecules of each pixel have two domain directions
Data Source
AI summary
A liquid crystal display device includes a first row including first, second, and third first-color pixels; a second row including fourth, fifth, and sixth first-color pixels; and a third row including seventh, eighth, and ninth first-color pixels. The first, fourth, and seventh first-color pixels are aligned. The second, fifth, and eighth first-color pixels are aligned. The third, sixth, and ninth first-color pixels are aligned. The second first-color pixel is disposed between the first and third first-color pixels. Each pixel electrode of the first, third, fifth, seventh, and ninth first-color pixels may receive a high voltage for a gray level. Each pixel electrode of the second, fourth, sixth, and eighth first-color pixels may receive a low voltage for a gray level lower than the high voltage for a gray level. Liquid crystal molecules in each pixel have two domain directions.