Liquid Crystal Display Domain Pattern for High Resolution Visibility
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Solution Overview
Problem
High-resolution liquid crystal displays (LCDs) face challenges in maintaining visibility and transmittance due to reduced pixel area, requiring innovative designs to enhance image quality without compromising performance.
Innovation Solution
The design involves arranging pixels in a domain pattern on an insulating substrate, with specific domain orientations in rows and columns to improve transmittance and visibility, including configurations where pixels in alternating rows have different domain orientations to reduce the visibility of horizontal lines and enhance viewing angles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the resolution of LCDs is increased, then the image quality and detail are improved, but the pixel area is reduced which deteriorates visibility and transmittance
Solution Approach 1:
The display is divided into multiple domains with different orientations. Each domain occupies a portion of the pixel area and has a specific liquid crystal molecule orientation. By segmenting the pixel into multiple domains with different orientations, the patent maintains the overall pixel area while improving visibility through the combined effect of multiple oriented domains, thus resolving the contradiction between high resolution and visibility.
Solution Approach 2:
Different regions (domains) within the pixel are given different liquid crystal molecule orientations. Each domain has a specific orientation angle that is different from its neighboring domains. This local differentiation in quality (orientation) allows the pixel to maintain adequate transmittance and visibility even at reduced pixel areas in high-resolution displays.
2Productivity
If the pixel area is reduced to achieve higher resolution, then more pixels can be displayed in the same area, but the transmittance of each pixel deteriorates
Solution Approach 1:
Each pixel is segmented into multiple domains with different orientations. This segmentation allows the pixel to effectively utilize the available area by creating multiple oriented regions that collectively maintain higher transmittance than a single-domain pixel of the same size, thus compensating for the reduced pixel area in high-density displays.
Solution Approach 2:
The patent changes the orientation parameter of liquid crystal molecules in different domains within a pixel. By varying the orientation angle as a parameter across different domains, the system optimizes light transmission characteristics, maintaining adequate transmittance even when the overall pixel area is reduced to increase pixel density.
3Ease of manufacture
If a single domain orientation is used in all pixels, then the manufacturing process is simple, but horizontal lines become visible reducing image quality
Solution Approach 1:
The patent introduces asymmetry in domain orientations within pixels. Instead of using a uniform orientation, adjacent pixels or domains have different orientation angles. This asymmetric arrangement breaks the symmetry that causes horizontal line artifacts, eliminating the harmful visual effect while maintaining a relatively simple manufacturing process through established liquid crystal alignment techniques.
Solution Approach 2:
Rather than attempting to eliminate horizontal line visibility by using a single uniform orientation (the conventional approach), the patent inverts the problem by deliberately using multiple different orientations. This inversion of the conventional single-orientation approach eliminates the harmful horizontal line effect while keeping the manufacturing process simple.
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 transmittance and visibility of LCDs by minimizing the visibility of horizontal lines and increasing the viewing angle, even at higher resolutions, thereby maintaining image quality with reduced pixel area.
Implementation Method 1
voltages are applied to the field generating electrodes to generate an electric field in a liquid crystal layer. Accordingly, the alignment direction of liquid crystal molecules of the liquid crystal layer is determined
Implementation Method 2
polarization of incident light is controlled
Data Source
AI summary
A liquid crystal display is provided. A liquid crystal display comprising: an insulating substrate, a plurality of pixels disposed on the insulating substrate, and a display area in which the pixels are arranged in rows and columns, wherein four pixels arranged successively in a row direction form a domain pattern, and the domain pattern is repeated in the row direction and a column direction in the display area, wherein each pixel in first and second rows of the domain pattern has a first domain orientation, and each pixel in third and fourth rows of the domain pattern has a second domain orientation that is different from the first domain orientation.