Multi-Domain Liquid Crystal Alignment via Electric Field
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Solution Overview
Problem
Conventional Advanced Super Dimension Switch (ADS) multi-domain mode liquid crystal display technologies require multiple rubbing processes for multi-domain alignment, leading to complexity and decreased display quality due to light leakage during dark states.
Innovation Solution
A liquid crystal display panel with a multi-domain horizontally aligned liquid crystal layer formed using a polymerable liquid crystal mixture on an array substrate, where liquid crystal molecules are aligned by an electrical field, allowing for a single alignment process and improved display quality without light leakage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple rubbing processes are performed on different rubbing directions to achieve multi-domain alignment, then multi-domain alignment is achieved, but the process becomes complicated and processing quality deteriorates
Solution Approach 1:
The patent replaces the mechanical rubbing method with an electric field-based alignment method. Specifically, it uses a multi-domain electrode structure that generates different oriented electric fields in different regions to directly align liquid crystal molecules without mechanical contact, thereby eliminating the need for multiple rubbing processes and simplifying the alignment process while maintaining multi-domain alignment quality
Solution Approach 2:
The patent changes the alignment mechanism from mechanical rubbing to electric field control by modifying the electrode structure parameters. The multi-domain electrode structure with specific electrode patterns and orientations creates different electric field directions in different domains, enabling multi-domain alignment through electrical parameters rather than mechanical rubbing directions
2Reliability
If multiple rubbing processes are performed to achieve multi-domain alignment, then alignment is achieved, but light leakage occurs during dark state
Solution Approach 1:
By replacing mechanical rubbing with electric field-based alignment using the multi-domain electrode structure, the patent achieves more precise and uniform liquid crystal alignment. This electrical alignment method creates consistent domain boundaries and prevents the misalignment issues that cause light leakage in mechanically rubbed multi-domain structures
3Reliability
If conventional ADS multi-domain mode is used with rubbing method, then multi-domain alignment is achieved, but processing time increases
Solution Approach 1:
The patent replaces time-consuming mechanical rubbing processes with a rapid electric field-based alignment method. The multi-domain electrode structure enables simultaneous alignment of liquid crystal molecules in multiple domains through electrical fields, eliminating the sequential rubbing steps required by conventional methods and significantly reducing alignment processing time
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 simplifies the alignment process and enhances display quality by achieving multi-domain alignment with a single process, reducing light leakage during dark states and improving contrast and transmittance.
Implementation Method 1
curing the polymerable liquid crystal mixture with liquid crystal molecules being horizontally aligned in multi domains so as to form a multi-domain horizontally aligned liquid crystal layer
Implementation Method 2
applying a voltage on the array substrate so that liquid crystal molecules of the polymerable liquid crystal mixture are horizontally aligned in multi domains on the plane of the array substrate according to a domain direction of the electrode under an effect of an electrical field
Data Source
AI summary
A liquid crystal display panel and manufacture method thereof and a liquid crystal display device are provided. The liquid crystal display panel comprises an array substrate (1); a color filter substrate (2); and a liquid crystal cell (3) formed by assembling the array substrate (1) and the color filter substrate (2). The liquid crystal cell (3) is filled with liquid crystal. A multi-domain horizontally aligned liquid crystal layer (4) including a the polymerable liquid crystal mixture is provided on the array substrate (1), and liquid crystal molecules of the multi-domain horizontally aligned liquid crystal layer are horizontally aligned in multi domains on a plane of the array substrate (1) according to domain directions of electrodes on the array substrate (1). Since the multi-domain alignment is achieved by a single alignment process, the process is simple and the display quality can be improved by using this mix alignment technique.