Fluorosurfactant Polymerizable Composition for Liquid Crystal Displays
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing polymerizable compositions for liquid crystal displays suffer from issues such as crystal precipitation, storage stability, and uneven film formation due to surfactant offset, leading to poor display quality and appearance.
Innovation Solution
A polymerizable composition comprising a specific fluorosurfactant and a polymerizable compound with a specific structure, characterized by a pentaerythritol or dipentaerythritol skeleton, which ensures excellent solubility, storage stability, and surface leveling properties, reducing surfactant offset and film unevenness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If polymerizable liquid crystal compounds with reverse or weak wavelength dispersion are added to polymerizable compositions, then the viewing angle of liquid crystal displays is improved, but crystals are precipitated and storage stability becomes insufficient
Solution Approach 1:
The patent modifies the molecular structure of polymerizable liquid crystal compounds by introducing specific mesogenic groups and spacer structures, changing physical and chemical parameters to achieve reverse or weak wavelength dispersion while preventing crystal precipitation and maintaining storage stability
Solution Approach 2:
The patent creates composite polymerizable compositions by combining polymerizable liquid crystal compounds with specific surfactants and polymerizable monomers, forming a stable composite system that prevents crystal precipitation while maintaining the desired optical properties for improved viewing angle
2Manufacturing precision
If specific surfactants are added to polymerizable liquid crystal compound compositions to solve coating unevenness, then coating uniformity is improved, but surfactant offset occurs on substrates causing poor appearance
Solution Approach 1:
The patent introduces a specifically structured surfactant as an intermediary substance that mediates between the polymerizable liquid crystal compound and the substrate, providing coating uniformity while preventing offset through its unique molecular structure comprising hydrophilic and hydrophobic regions
Solution Approach 2:
The patent optimizes the surfactant's molecular parameters including hydrocarbon chain length, aromatic ring structure, and polar group configuration to achieve the right balance between coating uniformity and offset prevention
3Productivity
If polymerizable compositions are applied to substrates and polymerized, then optical components are produced, but unevenness easily occurs leading to deteriorated display quality
Solution Approach 1:
The patent performs preliminary actions by pre-mixing polymerizable liquid crystal compounds with specific surfactants and polymerizable monomers to create a stable composition that prevents unevenness during the subsequent polymerization process, ensuring uniform film formation while maintaining production efficiency
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 composition provides stable and uniform polymer films with improved surface leveling and reduced surfactant offset, enhancing the quality and productivity of liquid crystal display components.
Implementation Method 1
a polymerizable composition comprising: a polymerizable compound having one polymerizable group or two or more polymerizable groups and satisfying formula (I)
Implementation Method 2
When the polymerizable composition provided is polymerized to produce a film-shaped polymerized product
Data Source
AI summary
The present invention provides a polymerizable composition containing a specific polymerizable compound and a fluorosurfactant having, in its molecule, a pentaerythritol skeleton or a dipentaerythritol skeleton. The invention also provides an optically anisotropic body, a retardation film, an antireflective film, and a liquid crystal display device that are produced using the polymerizable composition of the present invention. The present invention is useful because, when an optically anisotropic body is produced by photo-polymerization of the polymerizable composition, three features including the leveling properties of the surface of the optically anisotropic body, offset onto the substrate, and liquid crystal alignment can be improved simultaneously.