Liquid Crystal Display Pixel Electrodes Overlapping Common Electrode Slits
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Solution Overview
Problem
In high-speed response mode liquid crystal display devices, unstable alignment of liquid crystal molecules can occur due to interactions between electric fields near adjacent pixel electrodes, leading to deterioration in display quality.
Innovation Solution
The liquid crystal display device employs a structure with first and second common electrodes having different potentials, and pixel electrodes with linear electrodes and connection portions that overlap slits between these electrodes, allowing for controlled rotation of liquid crystal molecules and improved alignment stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If pixel electrodes and common electrodes are disposed on different layers with a slit in the common electrode to enable high-speed response mode, then response speed and alignment stability are improved, but unstable alignment regions are created due to electric field interactions between adjacent pixel electrodes
Solution Approach 1:
The common electrode is segmented into multiple independent common electrodes (first common electrode and second common electrode) that are disposed at different potentials. This segmentation isolates the electric fields between adjacent pixel electrodes, preventing harmful interactions while maintaining the high-speed response characteristics of the slit structure.
Solution Approach 2:
Different regions of the display are assigned different common electrode potentials to create locally optimized electric field distributions. By applying different potentials to adjacent common electrodes, the invention creates distinct local environments that stabilize liquid crystal alignment in each region while maintaining overall high-speed response performance.
2Stability of the object's composition
If pixel electrodes and common electrodes are disposed on different layers with a slit in the common electrode, then alignment stability is improved, but display quality deteriorates due to unstable alignment regions
Solution Approach 1:
The common electrode is divided into multiple independently controllable segments (first common electrode and second common electrode) with different potentials. This segmentation allows precise control of electric fields in different display regions, eliminating unstable alignment areas that degrade display quality while preserving alignment stability.
Solution Approach 2:
The invention changes the potential parameter of adjacent common electrodes to different values, creating distinct electric field environments. This parameter variation eliminates the formation of unstable alignment regions by preventing harmful electric field interactions, thereby improving display quality while maintaining alignment stability.
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 enhances the response speed and stability of liquid crystal alignment, reducing the occurrence of unstable alignment regions and improving display quality by maintaining consistent rotational directions of liquid crystal molecules.
Implementation Method 1
the alignment of liquid crystal molecules in the liquid crystal layer is controlled by utilizing a lateral electric field produced between these electrodes
Implementation Method 2
the alignment of liquid crystal molecules is controlled by utilizing a fringe electric field produced between these electrodes
Data Source
AI summary
According to one embodiment, a liquid crystal display device includes scanning and video signal lines, pixel electrodes and first and second common electrodes. The pixel electrodes include first and second pixel electrodes with linear electrodes and connection portion. In the first pixel electrodes, the linear electrodes overlap the first common electrode, and the connection portion overlaps first slit between the first and second common electrodes. In the second pixel electrodes, the linear electrodes overlap the second common electrode, and the connection portion overlaps second slit between the second and first common electrodes. Different potentials are applied to the first and second common electrodes.