Segmented Vertical Trunk Pixel Electrode for LCD Color Shift Reduction
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Solution Overview
Problem
Existing vertical alignment (VA) LCD panels experience significant color shift and reduced display quality when showing skin-tone colors due to the alignment of liquid crystal molecules in the cross-shaped trunk structure.
Innovation Solution
A pixel electrode with a cross-shaped trunk and branches, where the vertical trunk is composed of spaced sub-trunks parallel to the horizontal trunk, improving the inclination direction of liquid crystal molecules to reduce color shift and enhance display quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If a cross-shaped trunk structure is used in the pixel electrode, then the liquid crystal molecules align vertically to improve response time, but the proportion of the cross-shaped trunk increases and causes serious color shift when displaying skin-tone colors
Solution Approach 1:
The vertical trunk is divided into multiple sub-trunks that are spaced apart from each other. This segmentation reduces the continuous vertical alignment area, thereby decreasing the proportion of the cross-shaped trunk structure while maintaining the vertical alignment effect for response time performance. The segmented sub-trunks allow liquid crystal molecules to align vertically without creating excessive color shift in skin-tone display regions.
2Measurement precision
If the resolution of VA type LCD panels is improved, then display quality increases, but the proportion of the cross-shaped trunk increases causing color shift and reducing display quality
Solution Approach 1:
By dividing the vertical trunk into multiple spaced sub-trunks, the design allows for higher resolution displays without increasing the harmful proportion of the cross-shaped trunk. The segmented structure reduces the continuous vertical alignment area that causes color shift, enabling high resolution while maintaining accurate color reproduction in skin-tone regions.
Solution Approach 2:
The sub-trunks are strategically positioned and spaced to create different alignment characteristics in different regions. This local variation in alignment structure allows the pixel electrode to maintain vertical alignment for response time while reducing color shift in specific display regions, achieving both high resolution and accurate color representation.
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
The proposed pixel electrode structure effectively minimizes color shift and improves display quality by aligning liquid crystal molecules in a manner that reduces differences in viewing angles and front views, particularly when displaying skin-tone colors.
Implementation Method 1
control a deflection of liquid crystal molecules of the liquid crystal layer by applying voltage to a pixel electrode of the TFT array substrate and a common electrode of the CF substrate
Data Source
AI summary
A pixel electrode is provided. A plurality of sub-trunks of a vertical trunk of the pixel electrode are spaced apart from each other. Each of the sub-trunks is parallel to a horizontal trunk. Therefore, liquid crystal molecules on each sub-trunk is basically inclined in a horizontal direction. If the pixel electrode with the above structure is applied to a liquid crystal display panel, a color shift generated by the liquid crystal display panel when displaying skin-tone colors can be improved, and quality of the display can be improved. A liquid crystal display panel having the pixel electrode is also provided.