CN102732260B - Super-twisted nematic liquid crystal composition - Google Patents

Super-twisted nematic liquid crystal composition Download PDF

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CN102732260B
CN102732260B CN201210127433.4A CN201210127433A CN102732260B CN 102732260 B CN102732260 B CN 102732260B CN 201210127433 A CN201210127433 A CN 201210127433A CN 102732260 B CN102732260 B CN 102732260B
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crystal composition
liquid
liquid crystal
component
super
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CN102732260A (en
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陈海光
未欣
姜天孟
杭德余
王广涛
田会强
杨春艳
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Beijing Bayi Space LCD Technology Co Ltd
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Beijing Bayi Space LCD Technology Co Ltd
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Abstract

The invention provides a super-twisted nematic liquid crystal composition comprising the components of, by weight: (1) 1-70% of one or more compounds with a I-type structure; (2) 1-60% of one or more compounds with a II-type structure; and an optically active component which accounts for 0.03-1.00% of the total weight of the other components. The liquid crystal composition provided by the invention has excellent performances. Through the adjustment on the contents of the components, the obtained liquid crystal composition can be provided with different threshold voltages and deltan characteristics, and can be manufactured into a four-bottle system or a six-bottle system which is commonly used by customers and which can be conveniently used under different cell thicknesses and different driving voltages. The composition is characterized in that: under 64-way driving, the response is super fast, and is lower than 100ms.

Description

A kind of super-twist nematic liquid-crystal composition
Technical field
The invention belongs to liquid crystal material field, specifically, the invention provides a kind of super-twist nematic liquid-crystal composition of quick response, this liquid-crystal composition is applicable to stn liquid crystal display device.
Background technology
1888, Austria botanist Friedrich Reinitzer finds liquid crystal, and after this, research and the application of liquid crystal develop rapidly, especially, after W.Helfrich in 1971 has found twisted nematic liquid crystal field-effect together with M.Schadt, lcd technology is achieved.After TN-LCD technology forms large-scale industrial production, development along with technique of display, traditional TN-LCD technology has developed into STN-LCD and TFT-LCD technology, and its typical products develops into OA, FA, PC and TV display screen by wrist-watch, computer, instrument display screen.Due to LCD, have the features such as voltage is low, reduce power consumption, long lifetime and developed rapidly, people wait in expectation and utilize lcd technology development TV and terminal indicating meter.Undoubtedly, this has researched and proposed a series of new requirements to LCD, increases the information capacity of display, increases display area, improves contrast gradient and resolving power, faster response speed etc.
Early 1980s, it is found that, traditional twisted nematic liquid crystal (TN) device, as long as the twist angle of its liquid crystal molecule is strengthened, can improve its drive characteristic.Through effort, people develop a series of liquid crystal display devices that surpassed 90 ℃ of TN twist angles successively, and this class twist angle is called supertwist (STN-LED) series product at the liquid crystal display device of 180 ℃～270 ℃.The processing method that realizes supertwist angle is in nematic liquid crystal formula, to mix appropriate chiral liquid crystal.Make liquid crystal distortion certain angle in advance, by directed and control enclosure is thick can guarantee liquid crystal molecule distortion certain angle in box.
STN-LCD is more than TN type sweep trace, can carry out the large capacity demonstration of multichannel driving, and this just requires liquid crystal material viscosity very low; Nematic temperature range is wide; For keeping low operating voltage, require material to have large Δ ε; Very high photochemistry, heat, chemical stability, comprise the stability of UV-light and large k 33/ k 11.The stn liquid crystal material of prior art also exists high road to drive the weak points such as lower response speed is slower.
Summary of the invention
For the deficiencies in the prior art part, the invention provides a kind of super-twist nematic liquid-crystal composition.
For realizing object of the present invention, concrete technical scheme is:
A liquid-crystal composition, the component that contains following weight percentage:
The compound of one or more I class formations of (1) 1～70%;
The compound of one or more II class formations of (2) 1～60%;
Account for 0.03～1.00% opticity component of other component gross weights;
Wherein, the general structure of described I compounds is suc as formula shown in I:
Figure BDA0000157743870000021
R in formula I 1for C 2～C 10thiazolinyl, R 2for C 1～C 10alkyl or alkoxyl group, or can be F atom independently; X 1, X 2and X 3be F atom or H atom independently; N is 0 or 1;
The general structure of described II compounds is suc as formula shown in II:
In formula, R 3for C 1～C 10alkyl or alkoxyl group; X 4, X 5be F atom or H atom independently; Ring A is trans Isosorbide-5-Nitrae-cyclohexyl or Isosorbide-5-Nitrae-phenylene; Z is-CH 2-CH 2-,-COO-,-CF 2o-or singly-bound.
The structure of described opticity component is (asterisk represents chiral atom):
Figure BDA0000157743870000023
Figure BDA0000157743870000031
Wherein, described liquid-crystal composition, also contains the component of following weight percentage:
The compound of one or more III class formations of (3) 4～40%;
The compound of one or more IV class formations of (4) 0～15%;
The compound of one or more V class formations of (5) 0～30%.
Wherein, the general structure of described III type of structured compound is as shown in formula III:
Figure BDA0000157743870000032
In formula III, R 4and R 5be C independently 2～C 10alkyl, thiazolinyl or alkoxyl group; X 6and X 7be F atom or H atom independently; M is 0 or 1;
The structural formula of compound of described IV class formation is suc as formula shown in V:
Figure BDA0000157743870000033
R in formula IV 6and R 7be C independently 1～C 10alkyl or alkoxyl group; X 8be F atom or H atom independently;
The general structure of the compound of described V class formation is suc as formula shown in V:
Figure BDA0000157743870000034
In formula V, R 8and R 9be C independently 1～C 10alkyl or alkoxyl group; Ring B and ring C are trans Isosorbide-5-Nitrae-cyclohexyl or Isosorbide-5-Nitrae-phenylene independently.
Preferably, described liquid-crystal composition comprises the component of following weight percentage:
The compound of one or more I class formations of (1) 20～70%;
The compound of one or more II class formations of (2) 5～50%;
The compound of one or more III class formations of (3) 4～35%;
The compound of one or more IV class formations of (4) 0～10%;
The compound of one or more V class formations of (5) 0～25%;
And the opticity component that accounts for other component gross weights 0.60～0.95%.
Wherein, the R in described compound structure general formula 1, R 4, and R 5be C independently 2～C 5thiazolinyl or alkyl, R 2for C 2～C 5thiazolinyl or alkyl, or a kind of in methyl and F atom, R 3, R 6, R 7, R 8and R 9be C independently 2～C 5alkyl; X 1～X 8be F atom or H atom independently; Z is-COO-or singly-bound.
Wherein, the ring A in described compound structure general formula, ring B and ring C are trans Isosorbide-5-Nitrae-cyclohexyl or Isosorbide-5-Nitrae-phenylene independently, and n and m are 0 or 1 independently; Cyclohexyl in formula I, IV and formula V is trans cyclohexyl.
The application of liquid-crystal composition of the present invention in preparing stn liquid crystal display device.
The birefringent Δ n that liquid-crystal composition of the present invention has, between 0.110～0.180, is applicable in stn liquid crystal display part.
Liquid-crystal composition of the present invention can adopt ordinary method preparation, the method preparation that for example various ingredients at high temperature can be mixed and dissolve each other; Or the component that wherein content is less is dissolved in the main ingredient that content is larger at higher temperature, or each component is dissolved respectively in organic solvent, after then solution being mixed, after removal solvent, obtain.Wherein, solvent for use can be the conventional organic solvents such as acetone, chloroform or methyl alcohol.
Beneficial effect of the present invention is:
Liquid-crystal composition excellent performance of the present invention.By the adjustment to each component concentration, the super-twist nematic liquid-crystal composition of gained can have different threshold voltages and Δ n characteristic.In addition, can make client common four bottles or six bottles system used, be convenient to use under thick at different boxes in different driving voltage.It is characterized by 64 roads and drive response ultrafast, be less than 100ms.
Embodiment
Following examples are used for illustrating the present invention, but are not used for limiting the scope of the invention.
Liquid crystal compound of the present invention adopts the preparation of ubiquitous method in industry-thermal solution retorting process.First with balance, weigh by weight percentage each liquid crystalline cpd, wherein weigh addition sequence without particular requirement, conventionally with liquid crystalline cpd fusing point order from high to low, weigh successively mixing, at 50-80 ℃, heated and stirred melts evenly each component, again after filtration, revolve steaming, finally encapsulate and obtain target sample.In addition, also the related method of available patent CN101502767A is carried out the preparation of even liquid crystal.
Except as otherwise noted, in context, per-cent is weight percentage, and all temperature are degree Celsius to provide.All optical datas are all measured at 20 ℃.
In embodiment, use following abbreviation:
Δ n is optical anisotropy, n ofor specific refractory power (589nm, 20 ℃);
V 90for threshold voltage, it is the character voltage (V, 20 ℃) when relative 90% contrast gradient;
V 10for saturation voltage, it is the character voltage (V, 20 ℃) when relative 10% contrast gradient;
Cp be liquid crystal compound clearing point (℃);
τ onfor until the time while connecting while reaching maximum countrast 90%, τ offuntil the time while cutting off while reaching maximum countrast 10%, τ is τ on+ τ off(time of response) (ms);
Duty is for driving way (being abbreviated as D), and Bias is that bias voltage is than (being abbreviated as B, B=D 1/2+ 1).
In embodiment, the abbreviation of monomer structure unit represents to list in table 1.
The abbreviation of table 1 structural unit
Figure BDA0000157743870000051
Figure BDA0000157743870000061
Embodiment 1
Get the liquid crystalline cpd of following weight percent and prepare liquid-crystal composition with method described in the present invention, the performance perameter of concrete proportioning and the liquid-crystal composition of gained as shown in Table 2.
The parts by weight of each component and performance perameter in table 2 liquid-crystal composition
Figure BDA0000157743870000062
Embodiment 2
Get the liquid crystalline cpd of following weight percent and prepare liquid-crystal composition with method described in the present invention, the performance perameter of concrete proportioning and the liquid-crystal composition of gained as shown in Table 3.
The parts by weight of each component and performance perameter in table 3 liquid-crystal composition
Figure BDA0000157743870000063
Figure BDA0000157743870000071
Embodiment 3
Get the liquid crystalline cpd of following weight percent and prepare liquid-crystal composition with method described in the present invention, the performance perameter of concrete proportioning and the liquid-crystal composition of gained as shown in Table 4.
The parts by weight of each component and performance perameter in table 4 liquid-crystal composition
Embodiment 4
Get the liquid crystalline cpd of following weight percent and prepare liquid-crystal composition with method described in the present invention, the performance perameter of concrete proportioning and the liquid-crystal composition of gained as shown in Table 5.
The parts by weight of each component and performance perameter in table 5 liquid-crystal composition
Figure BDA0000157743870000082
Embodiment 5
Get the liquid crystalline cpd of following weight percent and prepare liquid-crystal composition with method described in the present invention, the performance perameter of concrete proportioning and the liquid-crystal composition of gained as shown in Table 6.
The parts by weight of each component and performance perameter in table 6 liquid-crystal composition
Figure BDA0000157743870000083
Figure BDA0000157743870000091
Embodiment 6
Get the liquid crystalline cpd of following weight percent and prepare liquid-crystal composition with method described in the present invention, the performance perameter of concrete proportioning and the liquid-crystal composition of gained as shown in Table 7.
The parts by weight of each component and performance perameter in table 7 liquid-crystal composition
Figure BDA0000157743870000101
Although above the present invention is described in detail with a general description of the specific embodiments, on basis of the present invention, can make some modifications or improvements it, this will be apparent to those skilled in the art.Therefore, these modifications or improvements, all belong to the scope of protection of present invention without departing from theon the basis of the spirit of the present invention.

Claims (2)

1. a super-twist nematic liquid-crystal composition, is characterized in that, the component of following weight part, consists of:
Account for the S811 of other component gross weights 0.80%
Or, by the component of following weight part, formed:
Figure FDA0000403746930000012
Figure FDA0000403746930000021
Account for the S811 of other component gross weights 0.80%
Or, by the component of following weight part, formed:
Account for the S2011 of other component gross weights 0.80%;
In described monomer expression formula, G represents
Figure FDA0000403746930000023
p represents g (F) represents
Figure FDA0000403746930000025
g (2F) represents p (F) represents
Figure FDA0000403746930000027
p (2F) represents p (2,6-2F) represent p (3,5-2F) represent
Figure FDA00004037469300000210
2. the application of liquid-crystal composition in preparing stn liquid crystal display device described in claim 1.
CN201210127433.4A 2012-04-26 2012-04-26 Super-twisted nematic liquid crystal composition Expired - Fee Related CN102732260B (en)

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CN108624335B (en) * 2017-03-15 2020-12-18 北京八亿时空液晶科技股份有限公司 Liquid crystal material and application thereof
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CN111694191A (en) * 2019-03-11 2020-09-22 咸阳彩虹光电科技有限公司 Liquid crystal display and liquid crystal display system

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JP2007197731A (en) * 2007-03-12 2007-08-09 Merck Patent Gmbh Stabilized liquid crystal material and liquid crystal element using the same
JP2008144167A (en) * 2006-12-05 2008-06-26 Merck Patent Gmbh Liquid crystal medium and liquid crystal display
CN101372619A (en) * 2008-10-17 2009-02-25 江苏和成化学材料有限公司 STN liquid crystal composition
CN101407718A (en) * 2007-10-12 2009-04-15 北京八亿时空液晶材料科技有限公司 Nematic liquid crystal composition
US7635505B2 (en) * 2004-06-18 2009-12-22 Merck Patent Gmbh Liquid Crystalline Medium
CN101608120A (en) * 2008-07-08 2009-12-23 北京八亿时空液晶材料科技有限公司 A kind of nematic liquid crystal composition
CN102433131A (en) * 2011-09-23 2012-05-02 北京八亿时空液晶科技股份有限公司 Liquid crystal composition suitable for 3D glasses

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US7635505B2 (en) * 2004-06-18 2009-12-22 Merck Patent Gmbh Liquid Crystalline Medium
JP2008144167A (en) * 2006-12-05 2008-06-26 Merck Patent Gmbh Liquid crystal medium and liquid crystal display
JP2007197731A (en) * 2007-03-12 2007-08-09 Merck Patent Gmbh Stabilized liquid crystal material and liquid crystal element using the same
CN101407718A (en) * 2007-10-12 2009-04-15 北京八亿时空液晶材料科技有限公司 Nematic liquid crystal composition
CN101608120A (en) * 2008-07-08 2009-12-23 北京八亿时空液晶材料科技有限公司 A kind of nematic liquid crystal composition
CN101372619A (en) * 2008-10-17 2009-02-25 江苏和成化学材料有限公司 STN liquid crystal composition
CN102433131A (en) * 2011-09-23 2012-05-02 北京八亿时空液晶科技股份有限公司 Liquid crystal composition suitable for 3D glasses

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