Liquid Crystal Composition for Phase Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing liquid crystal compositions for phase control of electromagnetic wave signals in the 1 MHz to 400 THz frequency range lack optimal balance of high upper limit temperature, low lower limit temperature, low viscosity, large optical anisotropy, and stability, especially in terms of dielectric loss and heat resistance.
Innovation Solution
A liquid crystal composition comprising specific compounds represented by Formulas (1), (2), (3), and (4), with defined structural features and proportions, which include alkyl, alkoxy, and alkenyl groups, and specific substituents, to achieve enhanced optical anisotropy, dielectric anisotropy, and stability, while maintaining low viscosity and dielectric loss.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional liquid crystal compositions are used, then the element can be manufactured with standard materials, but the composition cannot achieve optimal balance of high upper limit temperature, low lower limit temperature, low viscosity, large optical anisotropy, and stability
Solution Approach 1:
The patent employs a composite liquid crystal composition comprising multiple specific compounds (cyclic carboxylic acid compounds, cyclic carbonate compounds, and cycloaliphatic hydrocarbon compounds) in defined proportion ranges. This composite approach allows the composition to achieve both wide temperature range adaptability (from -50°C to over 100°C) and composition stability, resolving the contradiction between adaptability and reliability.
Solution Approach 2:
The patent systematically adjusts compositional parameters (proportions of different liquid crystal compounds) and molecular structure parameters (ring structures, substituent groups) to optimize performance. By changing these parameters within specific ranges, the composition achieves desired temperature characteristics, viscosity, and stability simultaneously.
2Power
If liquid crystal composition with high optical anisotropy is used, then phase control efficiency is improved, but dielectric loss increases
Solution Approach 1:
The patent introduces compounds with specific local molecular structures (cyclic carboxylic acid groups, cyclic carbonate groups) that create localized regions of high optical anisotropy. These localized structures enhance phase control efficiency while the overall compositional balance maintains low dielectric loss, resolving the contradiction between power and energy loss.
3Speed
If liquid crystal composition with low viscosity is used, then response speed is improved, but temperature stability deteriorates
Solution Approach 1:
The patent creates a composite composition where low-viscosity compounds (cycloaliphatic hydrocarbons) are combined with higher-temperature-stability compounds (cyclic carboxylic acids and carbonates) in specific proportions. This composite structure achieves both fast response speed and temperature stability simultaneously, resolving the contradiction between speed and temperature characteristics.
4Device complexity
If single compound liquid crystal is used, then composition simplicity is maintained, but characteristic balance (temperature range, viscosity, anisotropy, stability) cannot be optimized
Solution Approach 1:
The patent defines a multi-component composite liquid crystal composition with specific compound classes and proportion ranges. This composite structure achieves optimal balance of multiple performance characteristics (temperature range, viscosity, optical anisotropy, dielectric properties) while maintaining reasonable compositional simplicity through defined ranges rather than arbitrary complexity.
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 a material with a high upper limit temperature, low lower limit temperature, large optical anisotropy, and reduced dielectric loss, ensuring excellent phase control characteristics and stability for electromagnetic wave signal management within the specified frequency range.
Implementation Method 1
In liquid crystals, alignment of molecules changes and a dielectric constant changes according to a bias electric field from the outside
Implementation Method 2
large optical anisotropy in a frequency range used for phase control
Data Source
AI summary
There is provided a liquid crystal composition which has favorable characteristics and excellent characteristic balance as a material for an element used for phase control of an electromagnetic wave signal with a frequency of 1 MHz to 400 THz. A liquid crystal composition which contains at least one compound selected from the group consisting of compounds represented by Formula (1), and is used for phase control of an electromagnetic wave signal with a frequency of 1 MHz to 400 THz: