Liquid Crystal Composition for High Dielectric Anisotropy
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Solution Overview
Problem
Existing liquid crystal display technologies face challenges with insufficient dielectric anisotropy and low voltage retention rate, leading to slow response speed and high driving voltage, which limits their performance and efficiency.
Innovation Solution
A liquid crystal composition comprising specific compounds represented by formulas I, II, III, IV, and V, which enhance dielectric anisotropy and voltage retention rate, thereby improving response speed and reducing driving voltage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional liquid crystal materials are used, then the display can achieve basic functionality, but the dielectric anisotropy is insufficient and voltage retention rate is low
Solution Approach 1:
The patent employs composite liquid crystal material composition comprising multiple specific compounds (cyclic carboxylic acid compounds, cyclic ester compounds, and their derivatives) in defined weight ratios to achieve synergistic effects that simultaneously improve dielectric anisotropy and voltage retention rate while maintaining system reliability
Solution Approach 2:
The patent systematically adjusts critical parameters including dielectric anisotropy (Δε ≥ 10), voltage retention rate (≥ 90% at 80°C), and clear point (≥ 90°C) by selecting and combining specific liquid crystal compounds with tailored molecular structures and physical properties to resolve the contradiction between performance and material complexity
2Speed
If conventional liquid crystal materials are used, then the display structure remains simple, but the response speed is slow
Solution Approach 1:
The patent optimizes the response speed by carefully controlling the balance between dielectric anisotropy (Δε ≥ 10) and rotational viscosity through selection of specific cyclic carboxylic acid compounds and cyclic ester compounds, achieving fast response while maintaining manageable material composition complexity
Solution Approach 2:
The patent introduces specific functional groups (such as fluoro-substituted groups, alkoxy groups, and cyclic structures) at specific positions in the molecular structures to locally enhance dielectric properties and response characteristics without fundamentally changing the overall material system complexity
3Reliability
If conventional liquid crystal materials are used, then the driving voltage can be maintained at basic levels, but the dielectric anisotropy is insufficient leading to poor performance
Solution Approach 1:
The patent achieves high dielectric anisotropy (Δε ≥ 10) through composite formulation of cyclic carboxylic acid compounds (0.1-20 wt%), cyclic ester compounds (0.1-20 wt%), and their derivatives in optimized ratios, where the synergistic interaction between components enhances dielectric properties while keeping manufacturing processes manageable through standardized synthesis routes
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 liquid crystal composition achieves high dielectric anisotropy and voltage retention, resulting in faster response speed and lower driving voltage for liquid crystal displays, enhancing their overall performance.
Implementation Method 1
the liquid crystal composition has large dielectric anisotropy of liquid crystal material and high voltage retention rate
Data Source
AI summary
A liquid crystal composition, a liquid crystal display element and a liquid crystal display including the liquid crystal composition, belonging to the field of liquid crystal display. The liquid crystal composition includes a compound represented by formula I and one or more compounds represented by formula II. The liquid crystal composition can increase the dielectric anisotropy and improve the voltage retention rate.