Liquid Crystal Composition for IPS Display Transmittance
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Solution Overview
Problem
Liquid crystal displays (LCDs) face challenges with narrow viewing angles, low transmittance, and high driving voltage, which affect their performance and energy efficiency, particularly in large-screen applications, due to limitations in optical anisotropy and dielectric properties of existing liquid crystal compositions.
Innovation Solution
A liquid crystal composition comprising specific compounds of general Formulas I, II, N, and M, which enhance optical anisotropy, dielectric anisotropy, and elastic constants, improving transmittance and display performance while reducing driving voltage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If conventional liquid crystal compositions are used in LCD, then the manufacturing cost is reduced, but the transmittance is low and viewing angle is narrow
Solution Approach 1:
The patent changes the chemical composition parameters of the liquid crystal material by incorporating specific compounds (cyclohexane derivatives, phenyl cyclopropane carboxylic acid derivatives, etc.) with defined molecular structures and ratios to achieve superior optical anisotropy and transmittance properties
Solution Approach 2:
The patent creates a composite liquid crystal composition by combining multiple different liquid crystal compounds in specific proportions, where each compound contributes different optical and electrical properties that collectively enhance overall performance
2Adaptability or versatility
If higher optical anisotropy is achieved to improve transmittance, then the viewing angle characteristics improve, but the molecular alignment control becomes more difficult
Solution Approach 1:
The patent achieves uniform molecular alignment across the liquid crystal layer by carefully selecting compounds with appropriate alkyl chain lengths and rigid core structures that promote consistent orientational order throughout the material
Solution Approach 2:
The patent adjusts the elastic constants and viscosity parameters of the liquid crystal composition by selecting specific compound ratios, making the material more responsive to alignment fields while maintaining high optical anisotropy
3Speed
If the response speed is increased to display fast moving pictures, then the dynamic picture quality improves, but the transmittance may be reduced
Solution Approach 1:
The patent optimizes the viscosity and elastic constant parameters of the liquid crystal composition by selecting specific compounds and ratios, achieving fast response speed while maintaining high transmittance through balanced molecular mobility and optical properties
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 effectively increases transmittance and display quality, providing energy-saving and environment-friendly characteristics for IPS liquid crystal display devices by optimizing the optical and dielectric properties.
Implementation Method 1
The liquid crystal composition has a higher optical anisotropy... the different alignments of liquid crystal molecules correspond to different optical anisotropies
Implementation Method 2
The smaller the angle between incident light and liquid crystal molecules, the smaller the birefringence
Implementation Method 3
The liquid crystal composition has a higher dielectric anisotropy... Both positive dielectric anisotropy (Δε) liquid crystal (p-LC) and negative dielectric anisotropy (Δε) liquid crystal (n-LC) can be used in the IPS mode
Data Source
AI summary
The present invention provides a liquid crystal composition comprising: at least one compound of general Formula I; at least one compound of general Formula II; at least one compound of general Formula M and at least one compound of general Formula N. The present invention also provides a liquid crystal display device comprising the liquid crystal composition. The liquid crystal composition provided in the present invention has a higher optical anisotropy, a higher clearing point, a higher dielectric anisotropy, a high transmittance and a larger average elastic constant. When the liquid crystal composition is used in the IPS liquid crystal display device, the transmittance of the display device can be effectively improved, so that the display device has a good display performance while also having good energy-saving and environment-friendly characteristics.