Comblike Electrode Alignment for Liquid Crystal Response Speed
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Solution Overview
Problem
High-speed transverse field mode liquid crystal display devices require further improvement in alignment stability to enhance response speed and maintain regular rotational directions of liquid crystal molecules.
Innovation Solution
The implementation of comblike electrodes with specific angled sides and tapered structures on the second electrode, positioned closer to the liquid crystal layer, helps in controlling the alignment of liquid crystal molecules by creating a high-speed transverse field mode that promotes faster response and improved alignment stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If a high-speed transverse field mode liquid crystal display device uses a pixel electrode and common electrode arranged in different layers with a slit, then response speed is improved and alignment stability is enhanced, but further improvement of alignment stability is still demanded
Solution Approach 1:
The patent applies local quality by creating different electrode configurations in different regions. The first electrode has a first region with a first width and a second region with a second width different from the first width. This varying width configuration creates different electric field distributions in different regions, which improves alignment stability while maintaining fast response speed.
Solution Approach 2:
The patent employs asymmetry by designing the first electrode with non-uniform width across different regions. The first width in the first region differs from the second width in the second region, creating an asymmetric electrode structure. This asymmetric design generates specific electric field patterns that enhance the alignment stability of liquid crystal molecules without sacrificing response speed.
2Reliability
If the electrode closer to the liquid crystal layer has a slit to rotate liquid crystal molecules in reverse directions, then alignment stability is improved, but device complexity increases
Solution Approach 1:
The patent applies segmentation by dividing the first electrode into distinct regions: a first region with a first width and a second region with a second width. This segmentation allows different portions of the electrode to perform different functions, creating controlled electric field variations that improve alignment stability while maintaining a relatively simple overall structure compared to more complex multi-electrode systems.
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 ensures regular rotational directions of liquid crystal molecules, increasing response speed and stability, even under external impacts, by balancing rotational directions and maintaining initial alignment states.
Implementation Method 1
a transverse field produced between these electrodes is used to control the alignment of the liquid crystal molecules in the liquid crystal layer
Implementation Method 2
a fringe field produced therebetween is used to control the liquid crystal molecules
Data Source
AI summary
According to one embodiment, a display device includes first and second substrates, and liquid crystal layer. The first substrate includes first and second electrodes. The second electrode includes comblike electrodes extending in parallel to a first direction and tapered toward tips thereof, and a connecting portion which connects the comblike electrodes. An initial alignment direction is parallel to the first direction or a direction orthogonal to the first direction. The comblike electrode includes a first part having sides each form a first angle with the first direction, and a second part having sides each form a second angle with the first direction, the second angle being greater than the first angle.