Liquid Crystal Display Composition for Fast Response and UV Stability
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Solution Overview
Problem
Current liquid crystal displays face challenges in achieving low rotational viscosity and stability, which affect their response speed and reliability, particularly under varying conditions such as temperature and light exposure.
Innovation Solution
A liquid crystal display composition incorporating a specific liquid crystal compound represented by Formula 1 and a liquid crystal stabilizing agent, which includes compounds represented by Formulae A-1 to A-28, is used to improve rotational viscosity and stability, with the liquid crystal compound contributing to low viscosity and the stabilizing agent controlling reactions caused by UV rays or heat.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If conventional liquid crystal compositions are used, then the display can operate, but the rotational viscosity is high which limits response speed
Solution Approach 1:
The patent modifies the molecular structure of liquid crystal compounds by introducing specific chemical groups and configurations (as shown in Formula 1 and related formulas) to change physical parameters such as rotational viscosity. This structural parameter change enables lower rotational viscosity while maintaining other necessary properties for display operation.
Solution Approach 2:
The patent creates a composite liquid crystal composition by combining multiple liquid crystal compounds with different molecular structures and properties. This composite approach allows the mixture to achieve optimal balance between rotational viscosity, dielectric anisotropy, and refractive index that cannot be achieved with single compounds alone.
2Speed
If liquid crystal composition is optimized for low rotational viscosity, then response speed improves, but stability under UV and heat exposure deteriorates
Solution Approach 1:
The patent introduces stabilizer compounds as intermediary substances that mediate between the liquid crystal molecules and harmful external factors (UV rays and heat). These stabilizers absorb or neutralize the harmful effects while allowing the liquid crystal composition to maintain its low rotational viscosity and fast response characteristics.
Solution Approach 2:
The patent incorporates stabilizer compounds in advance into the liquid crystal composition to provide preemptive protection against UV degradation and heat-induced reactions. This beforehand cushioning prevents damage before it occurs, ensuring long-term reliability without compromising the speed-enhancing low viscosity properties.
3Speed
If liquid crystal compounds are modified to reduce viscosity, then response speed increases, but voltage holding ratio stability decreases
Solution Approach 1:
The patent carefully adjusts multiple physical and chemical parameters of the liquid crystal composition simultaneously, including viscosity, dielectric anisotropy, and elastic constants, to achieve an optimal balance. By coordinating changes in these parameters through specific molecular结构设计, the patent maintains voltage holding ratio stability while enabling fast response through reduced viscosity.
Solution Approach 2:
The patent uses composite liquid crystal compositions where different compounds contribute different properties: some compounds provide low rotational viscosity for fast response, while others maintain dielectric and elastic properties necessary for stable voltage holding ratio. The synergistic combination achieves both speed and stability.
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 proposed solution enhances the response speed and reliability of the liquid crystal display by maintaining a stable voltage holding ratio and reducing afterimages, while ensuring equivalent dielectric and refractive anisotropy properties, thus improving overall display quality.
Implementation Method 1
The liquid crystal display applies a voltage to the field generating electrodes to generate an electric field on the liquid crystal layer
Implementation Method 2
controls transmittance of light passing through the liquid crystal layer
Implementation Method 3
the stabilizing agent controlling reactions caused by UV rays or heat
Implementation Method 4
the stabilizing agent controlling reactions caused by UV rays or heat
Data Source
AI summary
A liquid crystal display including a first substrate, a second substrate overlapping with the first substrate, and a liquid crystal layer provided between the first substrate and the second substrate, wherein the liquid crystal layer includes a liquid crystal compound represented by Formula 1 and a liquid crystal stabilizing agent:wherein A, B, n1, n2, R, R′, Z1, and Z2 are the same as described in the specification.