2,3,4-Trisubstituted Benzene Liquid Crystal Composition
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current liquid crystal compounds for TFT-LCDs face challenges in achieving low viscosity, quick response times, high light transmittance, and stability to heat and light, while also requiring suitable birefringence anisotropy, electrical resistivity, and ultraviolet resistance, which are not adequately addressed by existing materials.
Innovation Solution
A liquid crystal composition comprising compounds of specific formulas I, II, and II-B, which provide a combination of low viscosity, moderate dielectric and optical anisotropy, and high stability, suitable for IPS display mode, with adjustable solubility and clearing point, enhancing light transmittance and response speed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If liquid crystal compounds are used to achieve low viscosity for quick response, then response time is improved, but stability to heat and light may deteriorate
Solution Approach 1:
The patent uses composite liquid crystal compositions combining multiple compounds (formula I, II, and II-B) to achieve both low viscosity for quick response and high stability to heat and light. The composite approach allows synergistic effects where different components contribute different properties, resolving the contradiction between speed and reliability.
Solution Approach 2:
The patent systematically changes molecular structure parameters (substituents on benzene rings, chain lengths, branching) to optimize both viscosity and stability. By adjusting these chemical parameters, the compound achieves low viscosity for fast response while maintaining high thermal and photostability through specific structural features like 2,3,4-trisubstituted benzene cores.
2Loss of energy
If liquid crystal compounds are used to achieve high light transmittance for energy saving, then energy consumption is reduced, but viscosity control becomes more difficult
Solution Approach 1:
The patent uses parameter changes in molecular structure (substituent types, positions, and sizes) to simultaneously control viscosity and optimize light transmittance. The 2,3,4-trisubstituted benzene structure with specific substituents (R1, R2, R3 groups) allows precise tuning of both properties without excessive complexity.
Solution Approach 2:
The patent applies local quality by placing specific functional groups at specific positions on the benzene ring (2,3,4-trisubstituted pattern). This localized structural design allows different regions of the molecule to contribute differently: some groups optimize light transmittance while others control viscosity, achieving both goals simultaneously.
3Manufacturing precision
If liquid crystal compounds are used to achieve suitable birefringence anisotropy for display performance, then display quality is improved, but electrical resistivity may be compromised
Solution Approach 1:
The patent combines multiple liquid crystal compounds with different inherent properties to achieve the desired balance. The composite composition allows one component to provide high birefringence anisotropy for display quality while another component provides high electrical resistivity, with the combination achieving both requirements simultaneously.
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 achieves a wider nematic phase temperature range, high electrical resistivity, and excellent light transmittance, reducing energy consumption and extending device lifespan by optimizing viscosity and anisotropy, making it suitable for advanced display technologies.
Implementation Method 1
Liquid crystals also form a 'viscosity' due to the intermolecular force. Small changes of liquid crystal molecules may result in obvious changes in the conventional parameter performance of the liquid crystal
Implementation Method 2
liquid crystals also form a 'viscosity' due to the intermolecular force
Implementation Method 3
a suitable birefringence anisotropy
Data Source
AI summary
Provided is a liquid crystal compound containing 2,3,4-trisubstituted benzene, a liquid crystal composition thereof, and a liquid crystal display element or a liquid crystal display comprising the liquid crystal compound or the liquid crystal composition, wherein the liquid crystal composition has a lower viscosity, can achieve a quick response, and further has a moderate dielectric anisotropy Δε, a moderate optical anisotropy Δn, and high stability to heat and light. The liquid crystal display element or liquid crystal display comprising the liquid crystal composition has the properties of a wider nematic phase temperature range, an appropriate birefringence anisotropy, a very high electrical resistivity, a good ultraviolet resistant property, a high charge retention rate, a low vapor pressure etc., and particularly, the liquid crystal compound or the liquid crystal composition has the advantage of a high light transmittance.