Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Liquid crystalline compound with negative dielectric anisotropy, liquid crystal composition, and liquid crystal display device

一种液晶化合物、液晶组成物的技术，应用在液晶材料、有机化学、非线性光学等方向，能够解决负值不够大、黏度小、不足以降低液晶显示元件驱动电压等问题

Inactive Publication Date: 2011-04-13
JNC CORP +1
View PDF5 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] (3) Low viscosity
However, although compound (a) has a negative Δε, there are cases where the negative value is not large enough, or the driving voltage of liquid crystal display elements such as VA mode and IPS mode is not sufficiently reduced.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Liquid crystalline compound with negative dielectric anisotropy, liquid crystal composition, and liquid crystal display device
  • Liquid crystalline compound with negative dielectric anisotropy, liquid crystal composition, and liquid crystal display device
  • Liquid crystalline compound with negative dielectric anisotropy, liquid crystal composition, and liquid crystal display device

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0151]The liquid crystal composition of the present invention can be generally prepared by known methods, for example, a method of dissolving desired components at high temperature. In addition, additives well-known to those skilled in the art can be added according to the application to prepare, for example, the liquid crystal composition (f) of the present invention containing an optically active compound described later, and the liquid crystal composition for GH mode to which a dichroic dye is added. In general, additives are well known to those skilled in the art, and are described in detail in literature and the like.

[0152] The liquid crystal composition (f) of the present invention is obtained by further including at least one optically active compound in the above-mentioned liquid crystal composition of the present invention.

[0153] A known chiral dopant can be added to the optically active compound. The chiral dopant has the effect of adjusting the twist angle re...

example

[0159] The following examples illustrate the present invention in more detail, but the present invention is not limited by these examples. In addition, unless otherwise specified, "%" means "wt%".

[0160] The obtained compound is borrowed 1 The nuclear magnetic resonance spectrum obtained by the H-NMR analysis, the gas chromatogram obtained by the gas chromatography (GC) analysis, etc. are identified, so the analysis method will be described first.

[0161] 1 H-NMR analysis

[0162] The measurement device was DRX-500 (manufactured by Bruker BIOSPIN). When measuring, dissolve the samples produced in Examples etc. in CDCl 3 In a deuterated solvent that can dissolve the sample, etc., it is carried out at room temperature, 500 MHz, and the cumulative number of times is 24. Tetramethylsilane (TMS) was used as a reference substance for the zero point of the chemical shift δ value.

[0163] GC analysis

[0164] The measurement device was a GC-14B gas chromatograph manufacture...

example 1

[0203] Example 1: 5-[4-(4-ethoxy-2,3-difluorophenoxymethyl)-cyclohexyl]-2-propane

[0204] Synthesis of Tetrahydropyran (Compound No.9)

[0205]

[0206] first step

[0207] In a nitrogen atmosphere reactor, 200 ml of THF was added to 41.2 g of methyltriphenylphosphonium bromide, cooled to -20°C, and 12.9 g of t-BuOK was added and stirred for 1 hour. A solution of 15.0 g of 1,4-dioxaspiro[4.5]decan-8-one in 200 ml of THF was added dropwise to the reaction solution, and stirred at -20°C for 1 hour. The reaction mixture was warmed up to room temperature, 200ml of water was added and extracted 3 times with 300ml of toluene. The obtained organic layer was washed with water, dried over anhydrous magnesium sulfate, and the solution was concentrated to about 200 ml under reduced pressure. The concentrated solution was poured into 1000 ml of n-hexane, and the precipitated solid was separated and removed by filtration. The resulting solution was distilled off the solvent under re...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
superconducting critical temperatureaaaaaaaaaa
superconducting critical temperatureaaaaaaaaaa
temperatureaaaaaaaaaa
Login to View More

Abstract

Disclosed is a liquid crystalline compound having excellent characteristics such as large negative dielectric anisotropy. A liquid crystal composition using the compound and a liquid crystal display device are also disclosed. A compound containing 1) a tetrahydropyran ring, 2) -CH2O- or -OCH2-, and 3) a group represented by formula (A) exhibits such an excellent characteristic that the value of dielectric anisotropy increases in the negative direction. By using a compound having such a characteristic, there can be obtained an excellent liquid crystal composition and an excellent liquid crystal display device.

Description

technical field [0001] The invention relates to a novel liquid crystal compound and liquid crystal composition. More specifically, it is a liquid crystal compound having a negative dielectric constant anisotropy (Δε), a liquid crystal composition containing the liquid crystal compound, and a liquid crystal display device (LCD) containing the liquid crystal composition. Background technique [0002] According to its display mode, LCD can be divided into: Dynamic Scattering (DS), Twisted Nematic (TN), Guest Host (GH), Super Twisted Nematic (STN) ), In-Plane Switching (IPS), Vertical Alignment (Vertical Alignment, VA), Optically Compensated Bend (Optically Compensated Bend, OCB) and other modes. Although the preferred properties of the liquid crystal composition contained in these LCDs also vary with different display modes, the preferred properties are as follows regardless of the display mode. [0003] (1) Relatively stable to external environmental factors such as moisture...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): C07D309/06C09K19/12C09K19/14C09K19/16C09K19/18C09K19/20C09K19/30C09K19/32C09K19/34C09K19/54G02F1/13
CPCC09K2019/3422C09K19/3402C07D309/06C07D309/10C09K2019/0407C09K2323/00
Inventor 益川解文
Owner JNC CORP
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com