V-Shaped Main Slit LCD Panel for Viewing Angle and Color Washout
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Solution Overview
Problem
Current wide viewing angle LCD panels suffer from light leakage and color washout due to the tilting of liquid crystal molecules along undesirable directions, which also reduce the display aperture ratio.
Innovation Solution
A polymer-stabilized alignment LCD panel with a V-shaped main slit between the first and second pixel electrodes, where the edges of these electrodes are parallel, and the liquid crystal molecules tilt along desired directions to prevent color washout and maintain a high aperture ratio.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a main slit is formed between the first pixel electrode and the second pixel electrode to create multi-domain alignment, then the viewing angle is improved, but the liquid crystal molecules tilt along directions of 90° and 270° causing color washout and color shift
Solution Approach 1:
The patent applies asymmetry by designing the main slit with a V-shape configuration where the tip points toward the second pixel electrode and the two branches have different orientations. This asymmetric geometry creates non-uniform electric field distribution that guides liquid crystal molecules to tilt along desired directions (45°, 135°, 225°, 315°) rather than the problematic 90° and 270° directions, thereby resolving the color washout issue while maintaining wide viewing angle performance
Solution Approach 2:
The patent implements local quality by making the edges of the first pixel electrode and second pixel electrode adjoining each branch substantially parallel, creating localized regions with different electric field characteristics. This local structural optimization ensures that liquid crystal molecules in different regions tilt along appropriate directions to achieve wide viewing angle while avoiding the harmful tilting directions that cause color shift
2Ease of manufacture
If a shading layer is added above the main slit to eliminate color washout and color shift, then the display quality is improved, but the display aperture ratio is reduced
Solution Approach 1:
The patent extracts and eliminates the need for the shading layer by incorporating the anti-color-washout function directly into the pixel electrode structure through the V-shaped main slit design. The asymmetric V-shape configuration inherently guides liquid crystal molecules away from the harmful tilting directions, achieving display quality improvement without requiring an additional shading layer that would reduce the aperture ratio
Solution Approach 2:
The patent merges the functions of the main slit (viewing angle enhancement) and the anti-color-washout structure into a single integrated V-shaped main slit design. By combining these functions into one structural element rather than using separate components (main slit + shading layer), the patent maintains high aperture ratio while achieving both wide viewing angle and color accuracy
3Ease of manufacture
If the pixel structure uses a conventional main slit configuration, then the manufacturing process is simple, but light leakage occurs due to disclination of liquid crystal molecules on the periphery of the alignment structure
Solution Approach 1:
The patent applies asymmetry through the V-shaped main slit configuration with the tip pointing toward the second pixel electrode. This asymmetric design creates a specific electric field distribution pattern that prevents disclination of liquid crystal molecules on the periphery of the alignment structure, eliminating light leakage while maintaining manufacturing simplicity through direct patterning 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
The V-shaped main slit structure ensures liquid crystal molecules tilt appropriately, enhancing the wide viewing angle display effect while maintaining a high aperture ratio and preventing color shift and light leakage.
Implementation Method 1
liquid crystal molecules in different regions to tilt along different directions, thereby achieving the effect of wide viewing angle
Implementation Method 2
an alignment manner of polymer-stabilized alignment (PSA) together with a pixel electrode having a plurality of micro slits to form multi-domain alignment
Implementation Method 3
the pixel structures 100 is electrically connected with the scan lines 102 and data lines 104, and the pixel structures 100 include a first active device 106, a second active device 108, a first pixel electrode 110, and a second pixel electrode 120
Data Source
AI summary
A liquid crystal display (LCD) panel including a first substrate, a plurality of scan lines, a plurality of data lines, a plurality of pixel structures, a second substrate, and a liquid crystal layer is provided. The scan lines, data lines, and pixel structures are disposed on the first substrate. The pixel structures are electrically connected to the corresponding scan lines and data lines. The liquid crystal layer is disposed between the first and the second substrates. Each pixel structure includes a first active device, a first pixel electrode electrically connected to the first active device, and a second pixel electrode. A V-shaped main slit formed between the first and the second pixel electrodes has a tip and two branches connected thereto. The tip of the V-shaped main slit directs towards the second pixel electrode. The edges of the first and the second pixel electrodes adjoining each branch are substantially parallel.