Pixel Structure With Varied Liquid Crystal Alignment
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Solution Overview
Problem
Liquid crystal display (LCD) panels with plane electric field technology suffer from chromatic aberration and low side viewing angle-contrast, requiring additional compensation films that increase manufacturing costs.
Innovation Solution
A pixel structure with subpixels on a substrate where the alignment directions of liquid crystals in adjacent subpixels are varied, either in rows or columns, allowing for multi-domain or double-domain configurations that enhance viewing angle-contrast without additional compensation films, achieved through specific connections of gate and data lines and application of high voltages to pixel electrodes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a compensation film is added to improve viewing angle-contrast, then the viewing angle-contrast is improved, but the manufacturing cost increases
Solution Approach 1:
The patent applies different alignment directions to different regions (domains) within the liquid crystal display. By creating multiple domains with different alignment orientations in specific patterns, the display achieves improved viewing angle-contrast without requiring additional compensation films, thus resolving the contradiction between performance improvement and manufacturing cost increase
Solution Approach 2:
The liquid crystal display is divided into multiple domains with different alignment directions. This segmentation allows each domain to optimize for specific viewing angles, and the combined effect of multiple domains achieves wide viewing angle-contrast without needing external compensation films, thereby improving contrast while avoiding additional manufacturing complexity
2Ease of manufacture
If plane electric field technology is used, then the manufacturing process is simple and aperture ratio is high, but chromatic aberration and low side viewing angle-contrast occur
Solution Approach 1:
The patent introduces different alignment directions in different local domains while maintaining the overall plane electric field structure. This local variation in alignment quality allows the display to reduce chromatic aberration and improve viewing angle-contrast without fundamentally changing the simple plane electric field manufacturing process, thus resolving the contradiction between manufacturing simplicity and optical 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 improves viewing angle-contrast across multiple angles without increasing manufacturing costs, enabling high contrast in both vertical and transverse directions by varying the alignment directions of liquid crystals and applying voltages accordingly, thus reducing chromatic aberration.
Implementation Method 1
Alignment directions of liquid crystals at a region corresponding to the adjacent subpixels in an identical row are not completely identical to each other, and/or alignment directions of liquid crystals at a region corresponding to the adjacent subpixels in an identical column are not completely identical to each other
Implementation Method 2
applying high voltages to pixel electrodes of all the subpixels
Data Source
AI summary
The present disclosure provides a pixel structure, a driving method thereof, a display substrate and a display device. The pixel structure includes a plurality of subpixels arranged on a substrate. Alignment directions of liquid crystals at a region corresponding to the adjacent subpixels in an identical row are not completely identical to each other, and/or alignment directions of liquid crystals at a region corresponding to the adjacent subpixels in an identical column are not completely identical to each other.