Array Substrate Electrode Holes for Wide-Angle LCD Color Uniformity
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing ADS liquid crystal display panels suffer from color deviation and limited viewing angles due to the use of slit electrodes, which hinder vertical alignment and multi-domain characteristics.
Innovation Solution
The array substrate incorporates a second electrode with hollow holes in the shape of convex polygons, circles, or ellipses, creating a fringe electric field that drives liquid crystals in multiple directions, enhancing multi-domain characteristics and maintaining high light transmittance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If slit electrodes are used in ADS liquid crystal display panels, then the device complexity is reduced and manufacturing is simplified, but color deviation occurs and viewing angles are limited due to inability to achieve vertical alignment and multi-domain characteristics
Solution Approach 1:
The second electrode is segmented into multiple isolated island electrodes rather than a continuous slit electrode structure. Each island electrode is separated by insulating gaps, creating discrete regions that can generate independent fringe electric fields. This segmentation enables multi-domain characteristics while maintaining manufacturing simplicity through standard photolithography patterning processes.
Solution Approach 2:
The electrode structure transitions from uniform slit electrodes to localized island electrodes with varying sizes and positions. Each island electrode creates a localized fringe electric field region, enabling different liquid crystal alignment domains in different spatial locations. This local variation in electrode configuration achieves vertical alignment and multi-domain characteristics while avoiding color deviation.
2Device complexity
If slit electrodes are used in ADS liquid crystal display panels, then the structure is simplified, but vertical alignment and multi-domain characteristics cannot be achieved, limiting viewing angles
Solution Approach 1:
The second electrode is divided into multiple isolated island electrodes instead of continuous slits. Each island electrode acts as an independent source of fringe electric field, creating multiple alignment domains. This segmentation achieves vertical alignment and wide viewing angles while maintaining relatively simple device structure through conventional fabrication processes.
Solution Approach 2:
The electrode design transitions from two-dimensional continuous slit structures to zero-dimensional isolated island structures. This dimensional reduction creates discrete fringe electric field regions that can independently control liquid crystal alignment in different spatial zones, enabling multi-domain characteristics and enhanced viewing angle performance without significantly increasing structural complexity.
3Ease of manufacture
If conventional electrode structures are used, then manufacturing processes are simple, but color uniformity is poor due to phase misalignment effects
Solution Approach 1:
The second electrode is segmented into multiple isolated island electrodes with insulating gaps between them. This segmentation creates distinct fringe electric field regions that can be independently optimized for liquid crystal alignment. The insulating gaps prevent electrical interference between adjacent islands while maintaining simple manufacturing through standard photolithography processes, thereby achieving both color uniformity and manufacturing simplicity.
Solution Approach 2:
An insulating layer is introduced as an intermediary between adjacent island electrodes. This insulating gap structure prevents electrical field interference between neighboring islands while allowing each island to generate its own fringe electric field for liquid crystal alignment. The intermediary insulating structure enables color uniformity by eliminating phase misalignment effects while maintaining manufacturing simplicity through conventional deposition and 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 solution achieves improved color uniformity and higher light transmittance by enabling multi-domain operation, reducing phase misalignment effects and enhancing viewing angle performance.
Implementation Method 1
a fringe electric field can be generated between the slit electrode and the plate electrode; the liquid crystal in the liquid crystal layer is deflected under the drive of the fringe electric field
Data Source
Figure 1~2
Figure 3~4
Figure 5~6
AI summary
An array substrate and a liquid crystal display panel. The array substrate comprises a base substrate (101), a first electrode (1081), an insulating dielectric layer (107) and a second electrode (1082), which are sequentially stacked, wherein the second electrode (1082) is provided with at least one hollowed-out hole (300, 301), and the hollowed-out hole (300, 301) is of a convex polygonal shape, a circle shape or an elliptical shape, such that liquid crystals in a liquid crystal display panel can be driven to fall in multiple different directions, and represent a multi-domain characteristic.