Liquid Crystal Display Orientation Layers for Uniform Transmissivity
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Solution Overview
Problem
Existing liquid crystal display devices, such as IPS and FFS modes, suffer from transmissivity dispersion and reduced liquid crystal efficiency across different areas of the pixel, leading to uneven brightness and viewing angle limitations.
Innovation Solution
A liquid crystal display device is designed with orientation layers on both substrates, where liquid crystals are twisted by 90° above the electrodes and 180° between them, optimizing the electric field orientation to enhance liquid crystal driving efficiency across all pixel areas.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If IPS mode or FFS mode is used to overcome narrow viewing angle, then viewing angle is improved, but transmissivity dispersion and reduced liquid crystal efficiency occur across different areas of the pixel
Solution Approach 1:
The patent applies different orientation directions to different regions of the pixel. Specifically, the orientation layer is configured to provide a first orientation direction in a first region and a second orientation direction in a second region, allowing each region to be optimized for its specific function while maintaining overall performance uniformity.
Solution Approach 2:
The pixel is divided into multiple regions with different orientation characteristics. The orientation layer is segmented into regions with different orientation directions (first orientation direction and second orientation direction), enabling localized optimization of liquid crystal alignment to achieve uniform efficiency across the entire pixel area.
2Ease of operation
If transverse electric field is generated between common electrode and pixel electrode, then liquid crystal molecules can be rotated, but transmissivity dispersion occurs in areas above and between electrodes
Solution Approach 1:
The patent implements local quality optimization by configuring the orientation layer to provide different orientation directions in different regions. The first orientation direction in the first region and the second orientation direction in the second region create localized optimization of liquid crystal alignment, ensuring uniform transmissivity and brightness across the entire pixel area while maintaining effective liquid crystal control through the transverse electric field.
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 achieves maximum liquid crystal efficiency and improved transmissivity and brightness uniformity, enhancing the overall picture quality by combining the efficiency of TN and IPS modes.
Implementation Method 1
liquid crystals are twisted by 90° above the electrodes and 180° between them, optimizing the electric field orientation to enhance liquid crystal driving efficiency
Implementation Method 2
A fringe field formed between the counter electrode and the pixel electrode operates the liquid crystal molecules
Implementation Method 3
two electrodes are formed on a single substrate so that a transverse electric field formed between the two electrodes can control the liquid crystal director
Data Source
AI summary
A liquid crystal display and a method for fabricating the same are disclosed, which can yield maximum liquid crystal efficiency from all areas within the pixels by orienting the liquid crystals in a manner that the liquid crystals are twisted by 90° in an area above the electrodes and twisted by 180° in an area in-between the electrodes. The liquid crystal display device includes, a pixel electrode insulated from a counter electrode having a plurality of slits on a first substrate, a second substrate facing into and adhered to the first substrate and having a liquid crystal layer formed therebetween, and an orientation layer formed on each inner surface of the first substrate and the second substrate, wherein one orientation layer is oriented to be twisted by 90° from above the pixel electrode and the other orientation layer is oriented to be twisted by 180° from above the slit.