Liquid Crystal Display Panel with Segmented Alignment Layers
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Solution Overview
Problem
Existing in-plane electric field driving type liquid crystal display devices suffer from color shift issues due to different optical properties observed from various angles, limiting their viewing angle and display effectiveness.
Innovation Solution
A liquid crystal display panel design featuring multiple regions with distinct alignment and polarization directions for the alignment layers and organic film layers on substrates, ensuring that the alignment directions of liquid crystal molecules and electrode orientations compensate each other, reducing color shift and enhancing viewing angles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the liquid crystal display device uses in-plane electric field driving type with stripe-shaped electrodes arranged in the same direction, then the viewing angle is increased, but color shift occurs when viewed from different angles
Solution Approach 1:
The liquid crystal display panel is divided into multiple regions (first region, second region, third region, etc.) where each region has stripe-shaped electrodes with different arrangement directions. This segmentation allows each region to display colors correctly from different viewing angles, thereby resolving the color shift issue while maintaining wide viewing angle capability.
Solution Approach 2:
Different regions of the display panel are assigned different electrode arrangement directions tailored to their specific viewing requirements. For example, the first region has electrodes arranged in a first direction, the second region has electrodes arranged in a second direction perpendicular to the first, and the third region has electrodes arranged in a third direction. This local customization of electrode orientation ensures color uniformity across different viewing angles for each region while maintaining the overall wide viewing angle advantage.
2Ease of manufacture
If all stripe-shaped electrodes are arranged in the same direction to simplify manufacturing, then manufacturing complexity is reduced, but color shift and display uniformity deteriorate
Solution Approach 1:
The display panel is segmented into multiple regions with different electrode arrangement directions. Each region can be manufactured using standardized processes, but the segmentation allows different orientation patterns to be implemented across the panel, resolving the conflict between manufacturing simplicity and display uniformity.
Solution Approach 2:
Different regions are assigned different electrode arrangement directions (first direction, second direction perpendicular to first, third direction, etc.) to optimize local display uniformity. This approach maintains reasonable manufacturing complexity while significantly improving overall display quality by addressing color shift issues in different regions.
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
The proposed design significantly improves display uniformity and reduces color shift when viewed from different angles by compensating optical properties across regions, resulting in consistent visual effects.
Implementation Method 1
Because the liquid crystal molecules have optical anisotropy, they have different optical properties observed from different angles.
Implementation Method 2
The first organic film layer has a first polarization direction and is disposed on the first substrate, the first polarization direction in each of the n regions is different. The second organic film layer has a second polarization direction and is disposed on the second substrate, the second polarization direction in each of the n regions is different.
Data Source
AI summary
A liquid crystal display panel includes a first substrate and a second substrate arranged opposite to the first substrate, a liquid crystal layer disposed between the first substrate and the second substrate, a first alignment layer, a second alignment layer, a first organic film layer, and a second organic film layer. The display panel includes a plurality of regions arranged in an array, and n regions form a region group, n being an integer and n≥3. The first alignment layer has a first alignment direction and is disposed on the first substrate, and the first alignment direction in each of the n regions is different. The second alignment layer has a second alignment direction and is disposed on the second substrate, the second alignment direction in each of the n regions is different, and the second alignment direction is same as the first alignment direction in a same region.