CN102732260A - Super-twisted nematic liquid crystal composition - Google Patents

Super-twisted nematic liquid crystal composition Download PDF

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CN102732260A
CN102732260A CN2012101274334A CN201210127433A CN102732260A CN 102732260 A CN102732260 A CN 102732260A CN 2012101274334 A CN2012101274334 A CN 2012101274334A CN 201210127433 A CN201210127433 A CN 201210127433A CN 102732260 A CN102732260 A CN 102732260A
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formula
liquid
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CN102732260B (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 compsn
Technical field
The invention belongs to the liquid crystal material field, specifically, the present invention provides a kind of super-twist nematic liquid-crystal compsn of quick response, and this liquid-crystal compsn is applicable to the stn liquid crystal display device.
Background technology
1888; Austria botanist Friedrich Reinitzer finds liquid crystal, and after this, the research and the application of liquid crystal develop rapidly; Especially W.Helfrich in 1971 and M.Schadt have found to make lcd technology be achieved after the twisted nematic liquid crystal field-effect together.After the TN-LCD technology forms large-scale industrial production; Development along with technique of display; Traditional T N-LCD technology has developed into STN-LCD and TFT-LCD technology, and its typical products is developed into OA, FA, PC, reached the TV image display by wrist-watch, computingmachine, instrument image display.Have characteristics such as voltage is low, reduce power consumption, long lifetime owing to LCD 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, promptly increases the information capacity of display, increases display area, improves contrast gradient and resolving power, quicker response 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, promptly 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 type twist angle is called supertwist (STN-LED) series product at 180 ℃～270 ℃ liquid crystal display device.The process method that realizes the supertwist angle is in the nematic liquid crystal prescription, to mix an amount of chiral liquid crystal.Make liquid crystal twist certain angle in advance, in box, twist certain angle through directed and the thick liquid crystal molecule that can guarantee of control enclosure.
STN-LCD is more than TN type sweep trace, can carry out the large vol demonstration that multichannel drives, and this just requires liquid crystal material viscosity very low; Nematic temperature range is wide; For keeping low WV, require material that big Δ ε is arranged; Very high photochemistry, heat, chemicalstability, comprise UV-light stability and big k 33/ k 11The stn liquid crystal material of prior art also exists high road to drive down, and response speed waits weak point more slowly.
Summary of the invention
To the weak point of prior art, the present invention provides a kind of super-twist nematic liquid-crystal compsn.
For realizing the object of the invention, concrete technical scheme is:
A kind of super-twist nematic liquid-crystal compsn, contain following components in weight percentage content:
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 said I compounds is suc as formula shown in the I:
Figure BDA0000157743870000021
R among the formula I 1Be C 2～C 10Thiazolinyl, R 2Be C 1～C 10Alkyl or alkoxyl group, or can be the F atom independently; X 1, X 2And X 3Be F atom or H atom independently; N is 0 or 1;
The general structure of said II compounds is suc as formula shown in the II:
Figure BDA0000157743870000022
In the formula, R 3Be C 1～C 10Alkyl or alkoxyl group; X 4, X 5Be F atom or H atom independently; Ring A is trans 1,4-cyclohexyl or 1,4-phenylene; Z is-CH 2-CH 2-,-COO-,-CF 2O-or singly-bound.
The structure of said opticity component is (an asterisk representative chiral atom):
Figure BDA0000157743870000023
Figure BDA0000157743870000031
Wherein, described liquid-crystal compsn, also contain following components in weight percentage content:
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, said III class formation structural general formula is shown in formula III:
Figure BDA0000157743870000032
In the 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 said IV class formation is suc as formula shown in the V:
R among the formula IV 6And R 7Be C independently 1～C 10Alkyl or alkoxyl group; X 8Be F atom or H atom independently;
The structural general formula of said V class formation is suc as formula shown in the V:
Figure BDA0000157743870000034
Among the formula V, R 8And R 9Be C independently 1～C 10Alkyl or alkoxyl group; Ring B and ring C are trans 1 independently, 4-cyclohexyl or 1,4-phenylene.
Preferably, described liquid-crystal compsn comprises following components in weight percentage content:
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 the said compound structure general formula 1, R 4, and R 5Be C independently 2～C 5Thiazolinyl or alkyl, R 2Be C 2～C 5Thiazolinyl or alkyl, or a kind of in methyl and the 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 the said compound structure general formula, ring B and ring C are trans 1 independently, and 4-cyclohexyl or 1,4-phenylene, n and m are 0 or 1 independently; Cyclohexyl among formula I, IV and the formula V is trans cyclohexyl.
The application of liquid-crystal compsn according to the invention in preparation stn liquid crystal display device.
The birefringent Δ n that liquid-crystal compsn of the present invention has is applicable in the stn liquid crystal display part between 0.110～0.180.
Liquid-crystal compsn of the present invention can adopt the ordinary method preparation, for example can various ingredients at high temperature be mixed and dissolved method preparation each other; Perhaps wherein the less component of content is dissolved under higher temperature in the bigger main ingredient of content, or each component is dissolved in organic solvent respectively, solution is mixed obtaining after solvent is removed in the back then.Wherein, solvent for use can be organic solvents commonly used such as acetone, chloroform or methyl alcohol.
Beneficial effect of the present invention is:
Liquid-crystal compsn excellent performance of the present invention.Through the adjustment to each component concentration, the super-twist nematic liquid-crystal compsn of gained can have different threshold voltages and Δ n characteristic.In addition, can make client usually used four bottles or six bottles system, be convenient to different boxes thick with the use down of different driving voltage.It is ultrafast to it is characterized by 64 tunnel driving responses, less than 100ms.
Embodiment
Following examples are used to explain the present invention, but are not used for limiting scope of the present invention.
Liquid crystal compound of the present invention adopts ubiquitous method in the industry-thermal solution retorting process preparation.At first with each liquid crystalline cpd of balance weighing by weight percentage; Wherein the weighing addition sequence does not have particular requirement; Usually mix with liquid crystalline cpd fusing point order from high to low weighing successively; Make each component fusion evenly 50-80 ℃ of following heated and stirred, through filtering, revolve steaming, encapsulation at last promptly gets target sample again.In addition, the related method of also available patent CN101502767A is carried out the preparation of even liquid crystal.
Except as otherwise noted, per-cent is weight percentage in the context, and all temperature are degree centigrade to provide.All optical datas are all measured down at 20 ℃.
Use following abbreviation among the embodiment:
Δ n is an optical anisotropy, n oBe specific refractory power (589nm, 20 ℃);
V 90Being threshold voltage, is the character voltage (V, 20 ℃) when relative 90% contrast gradient;
V 10Being saturation voltage, is the character voltage (V, 20 ℃) when relative 10% contrast gradient;
Cp be liquid crystal compound clearing point (℃);
τ OnTime during for connection when reaching maximum countrast 90%, τ OffTime when when reaching maximum countrast 10%, cutting off, 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).
Among the embodiment, the unitary abbreviation of monomer structure is represented to list in the 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 compsn with method described in the present invention, the performance perameter of the concrete proportioning and the liquid-crystal compsn of gained is by shown in the table 2.
The parts by weight of each component and performance perameter in table 2 liquid-crystal compsn
Figure BDA0000157743870000062
Embodiment 2
Get the liquid crystalline cpd of following weight percent and prepare liquid-crystal compsn with method described in the present invention, the performance perameter of the concrete proportioning and the liquid-crystal compsn of gained is by shown in the table 3.
The parts by weight of each component and performance perameter in table 3 liquid-crystal compsn
Figure BDA0000157743870000063
Embodiment 3
Get the liquid crystalline cpd of following weight percent and prepare liquid-crystal compsn with method described in the present invention, the performance perameter of the concrete proportioning and the liquid-crystal compsn of gained is by shown in the table 4.
The parts by weight of each component and performance perameter in table 4 liquid-crystal compsn
Figure BDA0000157743870000072
Figure BDA0000157743870000081
Embodiment 4
Get the liquid crystalline cpd of following weight percent and prepare liquid-crystal compsn with method described in the present invention, the performance perameter of the concrete proportioning and the liquid-crystal compsn of gained is by shown in the table 5.
The parts by weight of each component and performance perameter in table 5 liquid-crystal compsn
Figure BDA0000157743870000082
Embodiment 5
Get the liquid crystalline cpd of following weight percent and prepare liquid-crystal compsn with method described in the present invention, the performance perameter of the concrete proportioning and the liquid-crystal compsn of gained is by shown in the table 6.
The parts by weight of each component and performance perameter in table 6 liquid-crystal compsn
Figure BDA0000157743870000083
Figure BDA0000157743870000091
Embodiment 6
Get the liquid crystalline cpd of following weight percent and prepare liquid-crystal compsn with method described in the present invention, the performance perameter of the concrete proportioning and the liquid-crystal compsn of gained is by shown in the table 7.
The parts by weight of each component and performance perameter in table 7 liquid-crystal compsn
Figure BDA0000157743870000092
Figure BDA0000157743870000101
Though, the present invention has been done detailed description in the preceding text with general explanation and specific embodiments, on basis of the present invention, can to some modifications of do or improvement, this will be apparent to those skilled in the art.Therefore, these modifications or the improvement on the basis of not departing from spirit of the present invention, made all belong to the scope that requirement of the present invention is protected.

Claims (8)

1. a super-twist nematic liquid-crystal compsn is characterized in that, contains following components in weight percentage content:
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 said I compounds is suc as formula shown in the I:
R among the formula I 1Be C 2～C 10Thiazolinyl, r 2Be C 1～C 10Alkyl or alkoxyl group, or F atom; X 1, X 2And X 3Be F atom or H atom independently; N is 0 or 1;
The general structure of said II compounds is suc as formula shown in the II:
Figure FDA0000157743860000012
In the formula, R 3Be C 1～C 10Alkyl or alkoxyl group; X 4, X 5Be F atom or H atom independently; Ring A is trans 1,4-cyclohexyl or 1,4-phenylene; Z is-CH 2-CH 2-,-COO-,-CF 2O-or singly-bound;
The structure of said opticity component is:
Figure FDA0000157743860000013
2. liquid-crystal compsn according to claim 1 is characterized in that, also contains following components in weight percentage content:
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, said III class formation structural general formula is shown in formula III:
Figure FDA0000157743860000021
In the 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 said IV class formation is suc as formula shown in the V:
Figure FDA0000157743860000022
R among the formula IV 6And R 7Be C independently 1～C 10Alkyl or alkoxyl group; X 8Be F atom or H atom independently;
The structural general formula of said V class formation is suc as formula shown in the V:
Figure FDA0000157743860000023
Among the formula V, R 8And R 9Be C independently 1～C 10Alkyl or alkoxyl group; Ring B and ring C are trans 1 independently, 4-cyclohexyl or 1,4-phenylene.
3. liquid-crystal compsn according to claim 1 and 2 is characterized in that, comprises following components in weight percentage content:
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%.
4. liquid-crystal compsn according to claim 1 and 2 is characterized in that, the R in the said compound structure general formula 1, R 4, and R 5Be C independently 2～C 5Thiazolinyl or alkyl, R 2Be C 2～C 5Thiazolinyl or alkyl, or a kind of in methyl and the 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.
5. liquid-crystal compsn according to claim 1 and 2 is characterized in that, the ring A in the said compound structure general formula, ring B and ring C are trans 1 independently, 4-cyclohexyl or 1,4-phenylene.
6. liquid-crystal compsn according to claim 1 and 2 is characterized in that, the cyclohexyl among the formula I of said compound structure general formula, IV and the formula V is trans cyclohexyl.
7. liquid-crystal compsn according to claim 1 and 2 is characterized in that, n and m are 0 or 1 independently in the said compound structure general formula.
8. the application of each said liquid-crystal compsn of claim 1～7 in preparation stn liquid crystal display device.
CN201210127433.4A 2012-04-26 2012-04-26 Super-twisted nematic liquid crystal composition Expired - Fee Related CN102732260B (en)

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CN108624335A (en) * 2017-03-15 2018-10-09 北京八亿时空液晶科技股份有限公司 A kind of liquid crystal material and its application
CN109423305A (en) * 2017-08-23 2019-03-05 Dic株式会社 The manufacturing method of liquid-crystal composition
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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CN108624335A (en) * 2017-03-15 2018-10-09 北京八亿时空液晶科技股份有限公司 A kind of liquid crystal material and its application
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