Scanning Exposure Alignment for LCD Domain Division
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Liquid crystal display devices in MVA and PVA modes face challenges with slow response speed and increased alignment treatment processes for domain division, which complicates production and affects viewing angle and contrast ratio.
Innovation Solution
A production method involving scanning exposure of alignment films over multiple pixel regions in antiparallel directions to stabilize and efficiently form multiple domains within a pixel region, reducing the number of alignment treatments required.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If domain division techniques are used to widen viewing angle, then viewing angle is improved, but response speed deteriorates
Solution Approach 1:
The patent applies different alignment directions to different regions (domains) within a pixel. Specifically, it creates multiple domains with alignment directions differing by 180 degrees or more, where each domain has locally optimized alignment characteristics. This local differentiation enables wide viewing angle while the overall structure maintains fast response through selective alignment treatment.
2Manufacturing precision
If multiple alignment treatment processes are performed for domain division, then domain division precision is improved, but manufacturing complexity increases
Solution Approach 1:
The patent merges multiple alignment treatment processes into a single integrated process. By using a single alignment treatment step that simultaneously creates multiple domains with different alignment directions through specific exposure patterns or treatment methods, it achieves precise domain division without increasing manufacturing process complexity.
Solution Approach 2:
The patent performs preliminary alignment treatment on the alignment film before liquid crystal injection. This preliminary action creates the desired domain structure and alignment directions in advance, so that when liquid crystal is injected, the domains are already formed with precise alignment, eliminating the need for subsequent alignment adjustments or multiple treatment steps.
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 method enhances the response speed and viewing angle of liquid crystal display devices while minimizing the complexity and cost of alignment treatments, allowing for stable and efficient production of devices with multiple domains.
Implementation Method 1
as a method of the alignment treatment for providing the liquid crystal molecules with the pretilt angle, rubbing method, SiOx oblique deposition method, and photo-alignment method may be mentioned
Data Source
AI summary
A production method for making a liquid crystal display device includes subjecting a first alignment film and/or a second alignment film to scanning exposure continuously over a plurality of pixel regions; the scanning exposure including, in an inside of each of a plurality of pixel regions, a first scanning exposure for aligning liquid crystal molecules in a first alignment direction and a second scanning exposure for aligning liquid crystal molecules in a second alignment direction. The second alignment direction may be parallel and opposed to the first alignment direction. In the exposures, a light beam may be made incident from a oblique direction to a normal line on the substrate surface.