Liquid Crystal Composition for Fast 3D Display Response
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Liquid crystal displays face challenges in achieving high-speed response, reliability, and transmittance, particularly in 3D imaging applications, due to limitations in reducing cell gap and maintaining optimal physical properties of liquid crystal compositions.
Innovation Solution
A novel liquid crystal composition comprising specific compounds (Chemical Formulas 1, 2, 3, etc.) is developed, with precise weight ratios and structures, including neutral and polar liquid crystal compounds, and a reactive mesogen, to enhance response speed, stability, and transmittance, while forming a pretilt angle alignment layer through UV irradiation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the cell gap is reduced to achieve high-speed response, then the response speed is improved, but the reliability and transmittance deteriorate
Solution Approach 1:
The patent changes the physical and chemical parameters of the liquid crystal composition, including dielectric anisotropy, refractive anisotropy, and viscosity, to optimize performance. By adjusting these parameters, the composition achieves fast response speed while maintaining reliability and transmittance even at reduced cell gaps
Solution Approach 2:
The patent uses a composite liquid crystal composition comprising multiple compounds with specific functions: neutral liquid crystal compounds (Formulae 1-6), polar liquid crystal compounds (Formulae 7-12), and reactive mesogens (Formulae 13-18). This composite material approach allows simultaneous optimization of response speed, reliability, and transmittance
2Speed
If the cell gap is reduced to achieve high-speed response, then the response speed is improved, but the transmittance deteriorates
Solution Approach 1:
The patent optimizes the refractive anisotropy parameter (Δn) of the liquid crystal composition to achieve appropriate values that maintain high transmittance while enabling fast response speed at reduced cell gaps
3Use of energy by moving object
If negative dielectric anisotropy with high absolute value is used to achieve low voltage driving, then the driving voltage is reduced, but the response speed and viscosity control become difficult
Solution Approach 1:
The patent carefully balances the dielectric anisotropy parameter (Δε) by selecting specific liquid crystal compounds with appropriate negative dielectric anisotropy values. This optimization allows low voltage driving while maintaining fast response speed and controllable viscosity
Solution Approach 2:
The patent combines multiple liquid crystal compounds with different dielectric properties in a composite composition. This allows the overall composition to achieve the desired balance between low driving voltage and fast response speed through synergistic effects
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 improved response speed, reliability, and transmittance, minimizing afterimages and stains, and is suitable for high-speed 3D displays by controlling refractive anisotropy and dielectric properties within the liquid crystal layer.
Implementation Method 1
liquid crystal material having negative dielectric anisotropy (AO)
Implementation Method 2
refractive anisotropy (Δn) and a cell gap (d), the refractive anisotropy of a liquid crystal material must be adjusted
Implementation Method 3
forming a pretilt angle alignment layer through UV irradiation
Data Source
AI summary
A liquid crystal composition includes a first class including a first compound represented by Chemical Formula 1, wherein the first compound is 13 to 18 parts by weight based on 100 parts by weight of the total liquid crystal composition, and a second compound represented by Chemical Formula 2, wherein the second compound is 8 to 13 parts by weight based on 100 parts by weight of the total liquid crystal composition, a second class including a third compound represented by Chemical Formula 3. Chemical Formulas 1, 2, and 3 are represented by:andwherein R and R′ are, independently of each other, a hydrogen atom, or an unsubstituted or substituted C1 to C7 alkyl group.