Curved Display Pixel Electrode Texture Reduction
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Solution Overview
Problem
Liquid crystal display devices, particularly in the vertical alignment mode, face challenges in achieving improved transmittance and aperture ratio, especially in curved display devices where texture issues arise, affecting visibility and immersion.
Innovation Solution
The display device incorporates a pixel electrode design with horizontal and vertical stem electrodes, branch electrodes, and alignment layers, including photopolymerizable materials, on substrates with a predetermined radius of curvature, optimizing the arrangement of liquid crystal molecules for enhanced transmittance and aperture ratio while reducing texture.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a curved display device is implemented to maximize immersion, then visibility and immersion are improved, but texture issues arise affecting transmittance and aperture ratio
Solution Approach 1:
The patent applies different electrode configurations to different regions of the pixel electrode. The stem electrode and branch electrodes create localized electric field distributions that are optimized for curved surfaces, allowing each region to contribute to both immersion and transmittance performance
Solution Approach 2:
The patent transitions from conventional flat electrode designs to three-dimensional curved electrode structures that extend in multiple directions (stem electrodes perpendicular to the substrate, branch electrodes extending horizontally). This dimensional change allows the electrodes to effectively control liquid crystal molecules on curved surfaces while maintaining optical performance
2Adaptability or versatility
If a curved display device is implemented to maximize immersion, then visibility and immersion are improved, but texture issues arise affecting aperture ratio
Solution Approach 1:
The pixel electrode is segmented into multiple functional components: a stem electrode extending vertically from the substrate and multiple branch electrodes extending horizontally from the stem. This segmentation allows each component to perform its specific function in controlling liquid crystal orientation, enabling effective curved display performance with reduced texture while maintaining aperture ratio
Solution Approach 2:
The electrode structure utilizes three-dimensional spatial arrangement with stem electrodes extending in the vertical dimension and branch electrodes extending in horizontal dimensions. This multi-dimensional configuration optimizes electric field distribution on curved surfaces, reducing texture effects while preserving aperture ratio
3Manufacturing precision
If photopolymerizable materials are used in alignment layers, then liquid crystal molecule alignment is improved, but manufacturing complexity increases
Solution Approach 1:
The patent utilizes photopolymerizable materials that change their physical and chemical parameters upon light irradiation. The alignment layers undergo photopolymerization to fix liquid crystal molecule orientations, achieving precise alignment control through controlled chemical parameter changes rather than complex mechanical alignment 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 effectively improves transmittance and aperture ratio, maintaining performance comparable to flat devices and reducing texture in curved displays, thereby enhancing visibility and immersion.
Implementation Method 1
At least one of the first alignment layer, the second alignment layer, and the liquid crystal layer may include a photopolymerizable material.
Data Source
AI summary
A display device may include a first substrate, a second substrate opposite the first substrate, a liquid crystal layer between the first substrate and the second substrate, and a pixel electrode disposed on the first substrate and including a plurality of subpixel electrodes. The subpixel electrode may include a horizontal stem electrode, a plurality of vertical stem electrodes, and a plurality of branch electrodes extending from at least one of the horizontal stem electrode and the vertical stem electrodes.