LCD Pixel Domain Dividers for Wide Viewing Angle
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Solution Overview
Problem
Liquid crystal display (LCD) devices suffer from a narrow viewing angle due to their anisotropic refractive index, resulting in distorted images when viewed from the side.
Innovation Solution
The LCD device incorporates a first and second substrate with a pixel area defined by a gate line, data line, sub-pixel electrodes, and a common electrode, featuring domain dividers that divide the pixel area into multiple domains, allowing for controlled liquid crystal alignment and improved optical characteristics, thereby increasing the viewing angle.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If liquid crystals are used in LCD devices, then the device can display images with adjustable light transmittance, but the viewing angle becomes narrow and images appear distorted when viewed from the side
Solution Approach 1:
The common electrode is divided into multiple separate electrode regions (first, second, third, and fourth electrode regions) arranged in quadrants. This segmentation creates distinct liquid crystal alignment domains, where each region controls the orientation of liquid crystals in its respective quadrant. By segmenting the electrode structure, the patent achieves wider viewing angles and reduced image distortion while maintaining the ability to adjust light transmittance for image display.
2Adaptability or versatility
If the liquid crystal layer is aligned in a uniform direction, then the device structure is simple, but the viewing angle is limited and optical characteristics are not optimized for lateral viewing
Solution Approach 1:
The common electrode is segmented into multiple discrete regions (first, second, third, and fourth electrode regions) positioned in different quadrants of the pixel area. Each region independently controls liquid crystal orientation in its respective quadrant. This segmented approach enables optimized optical characteristics for lateral viewing and wider viewing angles while maintaining a relatively simple overall electrode structure that can be manufactured using standard LCD fabrication processes.
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 viewing angle and quality of images displayed by compensating for optical characteristics across different domains, preventing scattering of liquid crystal alignment and ensuring high-quality image display.
Implementation Method 1
since the liquid crystals have an anisotropic refractive index, the light transmittance of the LCD device varies according to the alignment of the liquid crystals
Implementation Method 2
A liquid crystal display (LCD) device is a display apparatus, which uses liquid crystals that are in a mesomorphic phase between a liquid phase and a solid phase
Data Source
AI summary
Disclosed is a liquid crystal display device including a first substrate, a second substrate, and a liquid crystal layer interposed there between. The first substrate is provided with gate lines and data lines thereon. The gate lines and data lines cross with each other and are insulated from each other. Pixel electrodes are stacked on the gate lines and data lines. Each pixel electrode includes first and second sub-pixel electrodes spaced apart from each other and a connection electrode, which connects the first sub-pixel electrode to the second sub-pixel electrode. The second substrate is provided with a common electrode thereon. The common electrode includes a first domain divider formed on the center of the first sub-pixel electrode and a second domain divider formed on the center of the second sub-pixel electrode.