Liquid Crystal Display Panel With Four Alignment Regions
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Solution Overview
Problem
Liquid crystal display panels with multiple alignment regions suffer from irregular alignment of liquid crystal molecules at borders, leading to dark lines and reduced transmittance, which deteriorate viewing angle characteristics and response performance.
Innovation Solution
The liquid crystal display panel is configured with four alignment regions providing different tilt azimuths, where the liquid crystal molecules are aligned at a twist angle of 45° or smaller, and linear slits are formed in the pixel electrodes between the pixel edge and the center line, stabilizing the tilt azimuths and reducing dark line generation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If one pixel is divided into multiple alignment regions to enhance viewing angle characteristics, then viewing angle characteristics are improved, but the number of regions with irregular alignment increases, leading to more dark lines and reduced transmittance
Solution Approach 1:
The patent applies local quality by providing different tilt azimuths to liquid crystal molecules in different alignment regions. Specifically, first and second alignment regions have first tilt azimuths while third and fourth alignment regions have second tilt azimuths, creating localized optical properties that enhance viewing angle characteristics without causing irregular alignment across the entire pixel.
Solution Approach 2:
The patent segments one pixel into four alignment regions (first, second, third, and fourth alignment regions) with different tilt azimuths. This segmentation allows each region to contribute to viewing angle characteristics while maintaining regular alignment through controlled electric field application, reducing the formation of dark lines.
2Adaptability or versatility
If the number of alignment regions is increased to enhance viewing angle characteristics, then viewing angle characteristics are improved, but the number of dark lines observed increases, deteriorating response performance
Solution Approach 1:
The patent provides different tilt azimuths locally in different alignment regions (first tilt azimuth in first and second regions, second tilt azimuth in third and fourth regions), which enhances viewing angle characteristics while maintaining regular alignment and response performance through controlled electric field distribution.
Solution Approach 2:
The patent utilizes electric fields generated by pixel electrodes to control and adjust the alignment of liquid crystal molecules in real-time. When voltage is applied, the electric fields regulate the tilt azimuths of liquid crystal molecules in each alignment region, ensuring regular alignment and reducing dark line formation, thereby improving response performance.
3Adaptability or versatility
If tilt azimuths are differentiated in multiple alignment regions to improve viewing angle, then viewing angle characteristics are enhanced, but irregular alignment occurs at borders, creating dark lines
Solution Approach 1:
The patent implements local quality by assigning different tilt azimuths to different alignment regions (first tilt azimuth for first and second regions, second tilt azimuth for third and fourth regions). This localized differentiation enhances viewing angle characteristics while maintaining alignment regularity through controlled electric field application that prevents irregular alignment at borders.
Solution Approach 2:
The patent changes the tilt azimuth parameter differently in different alignment regions to enhance viewing angle characteristics. By controlling the electric field parameters, the patent maintains regular alignment at the borders between regions with different tilt azimuths, preventing the formation of dark lines while preserving the benefits of differentiated alignment.
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 reduces the generation of dark lines and marks left by finger pressure, while enhancing transmittance and viewing angle characteristics, improving the overall performance of the liquid crystal display panel.
Implementation Method 1
the liquid crystal molecules being aligned in a direction substantially perpendicular to the first substrate and the second substrate and at a tilt in the respective tilt azimuth directions with no voltage applied to the liquid crystal layer, the liquid crystal molecules being to be more tilted in the respective tilt azimuth directions upon application of voltage to the liquid crystal layer
Data Source
AI summary
A liquid crystal display panel includes in the following order: a first substrate including pixel electrodes; a liquid crystal layer; and a second substrate including a counter electrode. The liquid crystal display panel includes pixels each including at least four alignment regions that provide different tilt azimuths to the liquid crystal molecules. The four alignment regions are arranged in a longitudinal direction of the pixels. The pixel electrodes are each provided with linear slits. The slits are formed in a region between one pixel edge of each pixel in the longitudinal direction and a center line of the pixel in the transverse direction in each alignment region. The liquid crystal molecules are aligned in a direction substantially perpendicular to the first substrate and the second substrate and at a tilt in the respective tilt azimuth directions with no voltage applied to the liquid crystal layer. The liquid crystal molecules are at a twist angle of substantially 45° or smaller. Upon application of voltage to the liquid crystal layer, the liquid crystal molecules are to be more tilted in the respective tilt azimuth directions and the tilt azimuth of each liquid crystal molecule is a given azimuth in each region in which the slits are formed.