LCD Pixel Structure with Multi-Voltage Electrodes for Wide Viewing Angles
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Solution Overview
Problem
Current liquid crystal display technologies face challenges in achieving wide viewing angles due to complex processing procedures and low production yield, particularly with twisted nematic and multi-domain vertical alignment displays, which result in narrow viewing angles, increased production costs, and reduced backlight transmission.
Innovation Solution
The proposed solution involves a pixel structure with a color filter substrate and an active device array substrate, where the first and second electrode patterns are connected to different voltage input terminals, allowing for different voltages to be applied, and the liquid crystal capacitance, storage capacitance, and gate-drain capacitance are adjusted to enhance viewing angles without the need for additional alignment protrusions or slits.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If twisted nematic liquid crystal display with wide viewing film is used, then viewing characteristics are improved, but device complexity and production cost increase
Solution Approach 1:
The pixel electrode is divided into multiple independent electrode patterns (first electrode pattern, second electrode pattern, third electrode pattern) with different shapes and orientations. Each electrode pattern segment controls liquid crystal molecules in different regions to achieve multi-directional light transmission and wide viewing angle without requiring complex wide viewing films.
2Adaptability or versatility
If multi-domain vertical alignment display with protrusions or slits is used, then viewing angle is widened, but manufacturing complexity increases and production yield decreases
Solution Approach 1:
The invention uses dynamically controllable electrode patterns with different shapes (circular, rectangular, triangular) that can be electrically configured to create different alignment directions. This dynamic approach replaces static protrusions or slits, simplifying manufacturing while achieving wide viewing angle through electrical control of liquid crystal orientation.
3Adaptability or versatility
If protrusions or slits are added for alignment, then viewing angle is improved, but backlight transmission rate decreases and light leakage occurs
Solution Approach 1:
The electrode patterns are designed with specific local geometries (circular patterns for radial alignment, rectangular patterns for directional alignment) that create appropriate liquid crystal orientation in each region. This localized pattern design achieves wide viewing angle without physical protrusions or slits, maintaining high backlight transmission and preventing light leakage.
4Ease of manufacture
If conventional single electrode pattern is used, then manufacturing is simple, but viewing angle is narrow
Solution Approach 1:
Multiple electrode patterns with different shapes and orientations are merged within a single pixel structure, all controlled by voltage signals. This combination achieves wide viewing angle characteristics of multi-domain designs while maintaining the manufacturing simplicity of conventional single-layer electrode structures through integrated 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 approach increases the viewing angle of liquid crystal displays, improves production yield, and reduces costs by simplifying the manufacturing process and allowing for better design flexibility, while maintaining high display quality.
Implementation Method 1
The liquid crystal layer is disposed between the pixel structure of the active device array substrate and the pixel structure of the color filter substrate
Implementation Method 2
the first electrode pattern is electrically connected to a first voltage input terminal. The second electrode pattern is electrically connected to a second voltage input terminal. In particular, the input voltage of the second voltage input terminal is different from the input voltage of the first voltage input terminal
Data Source
AI summary
Pixel structures of a color filter substrate, an active device array substrate and a liquid crystal display panel are provided. The pixel structure of the color filter substrate includes a first and second electrode patterns electrically connected to different voltage input terminals. The pixel structure of the active device array substrate includes a first and second pixel electrodes, a first and second gate-drain capacitances and a first and second storage capacitances. The areas of the first and the second pixel electrodes are different, the first and the second gate-drain capacitances are different, and the first and the second storage capacitances are different. In addition, the pixel structure of the liquid crystal display panel includes the pixel structure of the color filter substrate the pixel structure, the active device array substrate and a liquid crystal layer therebetween.