Liquid Crystal Display Common Electrode Sub-Electrodes
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Solution Overview
Problem
Current liquid crystal display devices face challenges in achieving high-definition pixel display due to limitations in processing technology for line and space (L/S) of pixel and common electrodes, making it difficult to create desired fine shapes, which affects display quality.
Innovation Solution
The configuration of a liquid crystal display device with a first substrate including scanning lines, signal lines, pixel electrodes, and a common electrode with sub-electrodes that alternate in width and orientation, allowing for precise overlap and alignment to enhance transmittance and brightness, overcoming the limitations of traditional manufacturing techniques.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If pixel electrodes and common electrodes with fine shapes are created to improve display quality, then display quality and definition are improved, but manufacturing precision deteriorates due to limitations in processing technology for line and space (L/S)
Solution Approach 1:
The common electrode is divided into multiple sub-electrodes (first common electrode and second common electrode) with different orientations. Each sub-electrode has a specific orientation (first orientation or second orientation) that alternates in width, creating a segmented structure that achieves fine shape control without requiring extremely precise single-step manufacturing
Solution Approach 2:
Different regions of the common electrode have different local properties - the first common electrode has a first orientation while the second common electrode has a second orientation. This local differentiation allows each region to contribute differently to liquid crystal alignment, achieving overall high definition through localized optimization rather than uniform fine manufacturing throughout
2Reliability
If alternating width sub-electrodes with different orientations are used, then liquid crystal molecule alignment is stabilized and transmittance is improved, but device complexity increases
Solution Approach 1:
The common electrode is segmented into first and second common electrodes with alternating widths and different orientations. This segmentation creates multiple alignment domains that work together to stabilize liquid crystal molecules, with each segment contributing to overall alignment stability through its specific orientation and width pattern
Solution Approach 2:
The patent introduces orientation as an additional dimension of control beyond just electrode width. By varying both width and orientation across different sub-electrodes, the system achieves stable liquid crystal alignment through multi-dimensional parameter control rather than relying solely on single-dimensional fine patterning
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 display quality by stabilizing liquid crystal molecule alignment, reducing low transmittance areas, and preventing color mixing, resulting in higher brightness and accuracy in high-definition displays.
Implementation Method 1
a liquid crystal layer disposed between the substrates
Implementation Method 2
pixel electrodes and common electrodes having fine shapes are required
Data Source
AI summary
According to one embodiment, a liquid crystal display device includes first and second substrates and a liquid crystal layer. The first substrate includes scanning line extending in a first direction, signal line extending in a second direction, pixel electrodes including and a common electrode. The common electrode includes sub-electrodes extending in the first or second direction. Each of the sub-electrodes includes a first portion having a width greater than the scanning or signal line, and a second portion having a width less than the first portion but greater than the scanning or signal line. The first and second portions are alternately arranged along a direction in which the sub-electrodes extend.