CN104513666B - A kind of liquid crystal media and application - Google Patents
A kind of liquid crystal media and application Download PDFInfo
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- CN104513666B CN104513666B CN201510013788.4A CN201510013788A CN104513666B CN 104513666 B CN104513666 B CN 104513666B CN 201510013788 A CN201510013788 A CN 201510013788A CN 104513666 B CN104513666 B CN 104513666B
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Abstract
The invention discloses a kind of negative dielectric anisotropy liquid crystal medium, the liquid crystal media is included：One or more weight percentages are the dielectric neutral compound shown in 15~55% formula I 1 and formula I 2, one or more contents dielectric negativity compound shown in 1~60% formula II, one or more contents are the dielectric negativity compound of 1~80% general formula III.The optical anisotropy of liquid crystal media of the present invention is in the range of 0.080~0.150, and with relatively low rotary viscosity, appropriate negative dielectric anisotropic and larger K values, available for the active matrix display element containing the liquid crystal media, such as ECB, FFS or IPS, the Active Matrix Display of MVA, PVA or HVA effect.
Description
Technical field
The present invention relates to liquid crystal material field, more particularly to a kind of liquid crystal media, the liquid crystal media is that negative dielectric is each
The liquid crystal media of anisotropy, the invention further relates to the liquid crystal media in active matrix display element, such as use ECB, FFS or IPS,
Application in the Active Matrix Display of MVA, PVA or HVA effect.
Background technology
Current TFT-LCD has been widely used for industrial circle and household consumption field, and tradition is almost instead of completely
CRT monitor market.According to the difference of liquid crystal display mode, liquid crystal display cells can be divided into twisted nematic (TN) mould
The various modes such as formula, super-twist nematic (STN) pattern, coplanar (IPS) pattern, vertical orientation (VA) pattern.
Current liquid crystal display cells are generally twisted nematic (TN) pattern, but it is present that contrast is low, angle of visibility is narrow
Shortcoming, and the display of vertical orientation (VA) pattern is obtained with its wide angle of visibility, high-contrast and without advantages such as friction matchings
To extensive use, and as common display patterns of the large scale TV with TFT-LCD, in addition, the contrast that VA patterns are shown is to liquid
The wavelength dependency degree of brilliant birefringence, the thickness of liquid crystal layer and incident light is smaller, therefore, VA patterns become it is now great before
The lcd technology of scape.
For the liquid crystal material used in the display mode of VA patterns etc., it is desirable to low voltage drive, quick response, wide temperature
Scope and good low-temperature stability.In other words, also require we develop negative dielectric anisotropic absolute value big, low-viscosity,
Big K33 values and the compound of high clearing point.
The content of the invention
The technical problem to be solved in the invention is to provide a kind of negative dielectric anisotropy liquid crystal medium, the liquid crystal media
Optical anisotropy is in the range of 0.080~0.150, and with low rotary viscosity, faster response time and appropriate
Negative dielectric anisotropic.
In order to solve the above technical problems, the technical solution used in the present invention is：
The invention provides a kind of liquid crystal media, it is characterised in that the liquid crystal media includes one or more formulas I 1
Dielectric neutral compound shown in shown dielectric neutral compound and one or more formulas I 2
With the dielectric negativity compound shown in one or more formulas II
Wherein,
H is expressed as cyclopenta or cyclobutyl；
R1-R5Represent independently of one another it is following 1.~3. in shown group any one：
1., carbon number is 1~7 straight chained alkyl,
2., 1. one or more-CH in shown group2- by-O- ,-CH=CH-CH3Or-CH=CH- replaces what is formed
Group,
3., 1. or 2. in shown group one or more-H by-F ,-Cl ,-CH=CH2Or-CH=CH-CH3Replace institute's shape
Into group；
Z1、Z2Singly-bound ,-CH are represented independently of one another2-、-CH2CH2-、-CH2O- or-OCH2- in any one；
In various-(O) may be the same or different, and represent that (bracket O represents not essential, works as nothing by singly-bound or-O- independently of one another
When be singly-bound)；
Any group in singly-bound or following groups is represented independently of one another：
N, m represent 0 or 1 independently of one another.
By adopting the above-described technical solution, the technological progress acquired by the present invention is：
The invention discloses a kind of negative dielectric anisotropy liquid crystal medium, the liquid crystal media excellent performance, optics is respectively to different
Property in the range of 0.080~0.150, it is and each to different with low rotary viscosity, faster response time, appropriate negative dielectric
Property, high clearing point and good Low-Temperature Reliability, be highly suitable for manufacturing the liquid crystal display cells of VA patterns, be particularly suitable for
Active matrix display element, such as using ECB, FFS or IPS, the Active Matrix Display of MVA, PVA or HVA effect.
Compound shown in the formula II that the present invention is provided, due to introducing(cyclobutyl) or(ring penta
Base) substituent, not only increase with intersolubility of the liquid-crystal compounds in liquid crystal media shown in the formula II of polarity negativity,
Improve its clearing point and K33 numerical value simultaneously；So that the liquid crystal media for including liquid-crystal compounds shown in formula II also has
There are very high clearing point, big dielectric anisotropy and big K33 values.Exactly because liquid-crystal compounds shown in formula II has this
Class advantage, it is following by the required liquid-crystal compounds as active matrix display element liquid crystal media.
The neutral compound of dielectric shown in the formula I 1 and formula I 2 that the present invention is provided, typically with less viscosity and
Good intersolubility.According to actual needs, appropriate formula I 1 can be added and the compound of formula I 2 is come to each of liquid crystal media
Item characteristic is adjusted.
Liquid crystal media provided by the present invention can also be comprising the dielectric negativity compound shown in one or more general formula IIIs
Wherein,
R6、R7Represent independently of one another it is following 1.~3. in shown group any one：
1., carbon number is 1~7 straight chained alkyl,
2., 1. one or more-CH in shown group2- by-O- ,-CH=CH-CH3Or-CH=CH- replaces what is formed
Group,
3., 1. or 2. in shown group one or more-H by-F ,-Cl ,-CH=CH2Or-CH=CH-CH3Replace institute's shape
Into group；
Z1、Z2Singly-bound ,-CH are represented independently of one another2-、-CH2CH2-、-CH2O- or-OCH2- in any one；
- (O) represent singly-bound or-O- (bracket O represents not essential, when without when be singly-bound)；
Any group in singly-bound or following groups is represented independently of one another：
Represent any group in singly-bound or following groups：
N, m and o represent 0 or 1 independently of one another.
The compound of dielectric negativity shown in the general formula III that the present invention is provided, end can for the compound of linear alkyl groups
Since reduce the pre-tilt angle of liquid crystal, to improve the black state of liquid crystal, improve contrast.
Preferably, the liquid crystal media includes the formula I 1 and the institute of formula I 2 weight/mass percentage composition for 15~55%
Dielectric neutral compound, the weight/mass percentage composition shown is the dielectric negativity compound and quality hundred shown in 1~60% formula II
It is the dielectric negativity compound shown in 1~80% general formula III to divide content.
As more preferably scheme, the liquid crystal media includes weight percentage 20%-48% formula I 1 and formula I 2
Dielectric negativity compound, weight percent shown in shown dielectric neutral compound, the formula II of weight percentage 1~55%
Dielectric negativity compound shown in the general formula III of content 2~70%.
The optical anisotropy of above liquid crystal media can be in the range of 0.080~0.150.
By selecting above-mentioned each compound, and its weight percentage is suitably adjusted, liquid crystal media can
To obtain different dielectric anisotropies, threshold voltage, clearing point and birefringent characteristic, it is easy to thick and different in different liquid crystal cells
Used under driving voltage, the scope of application is very wide.
The liquid crystal media provided by the present invention can also be comprising the dielectric neutralisation shown in one or more general formulae IVs
Compound；
Wherein,
R8And R9Represent independently of one another it is following 1.~3. in shown group any one：
1. the unbranched alkoxy that the straight chained alkyl or carbon number that carbon number is 1~7 are 1~7,
2., 1. one or more-CH in shown group2- by-O- ,-CH=CH-CH3Or-CH=CH- replaces what is formed
Group,
3., 1. or 2. in shown group one or more-H by-F ,-Cl ,-CH=CH2Or-CH=CH-CH3Replace institute's shape
Into group；
Z3Independently represent singly-bound ,-CH2-、-CH2CH2- ,-COO- or-CH2Any one in O-；
Any group in singly-bound or following groups is represented independently of one another：
The gross weight percentage composition of dielectric neutral compound shown in one or more general formulae IVs be preferably greater than 0% and
Less than or equal to 10%.
Liquid crystal media provided by the present invention can also include the polymerizable compound shown in one or more formulas V, institute
The gross weight percentage composition for stating the polymerizable compound shown in one or more formulas V is more than 0% less than or equal to 1%；
In the formula V
It is each independently selected from phenyl, the phenylene in methyl generation, dimethyl generation
At least one of phenylene of phenylene, the phenylene of fluoro and/or two fluoro；
N and m represent 1 or 2 independently of one another.
The optical anisotropy of above liquid crystal media can be in the range of 0.080~0.150.
Dielectric negativity compound described in above-mentioned liquid crystal media shown in one or more formulas II preferably is selected from a of formula II extremely
The one or more in dielectric negativity compound shown in II j
The dielectric that dielectric negativity compound shown in one or more general formula IIIs preferably is selected from shown in a of formula III to III m is born
One or more in property compound
II a to the j of formula II, III a into III m,
R5-R7Be respectively it is following 1.~3. in shown group any one：
1., carbon number is 1~7 straight chained alkyl,
2., 1. one or more-CH in shown group2- by-O- ,-CH=CH-CH3Or-CH=CH- replaces what is formed
Group,
3., 1. or 2. in shown group one or more-H by-F ,-Cl ,-CH=CH2Or-CH=CH-CH3Replace institute's shape
Into group；
- (O) represent singly-bound or-O- (bracket O represents not essential, when without when be singly-bound)；
Any group in singly-bound or following groups is represented independently of one another：
According to the liquid crystal media of the present invention, it can in addition contain extraly include following one kind that concentration of component is 0%~1%
Or several additives：Pleochroic dye, UV stabilizer, antioxidant, chiral are to dopant, polymerization initiators, particulate and nanoparticle
Son.
The invention also discloses above liquid crystal media in active matrix display element, ECB, FFS or IPS, MVA, PVA or
Application in the Active Matrix Display of HVA effects.
By using the dielectric negativity compound of the formula II in the present invention, in addition optimum organization and proportion optimizing, and separately
It is outer to mix to reach the performance ginseng required by display using other several or even ten several liquid-crystal compounds with feature
Number, with negative dielectric anisotropic absolute value is big, low-viscosity, big K33 values and the characteristics of high clearing point, so as to develop new
The VA patterns of excellent performance, which are shown, uses liquid crystal material.
Embodiment
The present invention is described in further details with reference to embodiment：
Involved number is weight percentage in following embodiments, temperature unit for DEG C, other symbols it is specific
Meaning and test condition are as follows：
S-N represents the crystalline state of liquid crystal to nematic fusing point (DEG C)；
C.p. the clearing point (DEG C) of liquid crystal, tester are represented：The micro- heat analysis of Mettler-Toledo-FP System
Instrument；
γ 1 is rotary viscosity (mPas), and test condition is：25℃、INSTEC:ALCT-IR1,18 microns of vertical cassettes；
K11For distortion elastic constant, K33For splay elastic constant, test condition is：25℃、INSTEC:ALCT-IR1、18
Micron vertical cassette；
△ ε represent dielectric anisotropy, △ ε=ε∥-ε⊥, wherein, ε∥For the dielectric constant parallel to molecular axis, ε⊥It is vertical
Directly in the dielectric constant of molecular axis, test condition：25℃、INSTEC:ALCT-IR1,18 microns of vertical cassettes；
Δ n represents optical anisotropy, △ n=no-ne, wherein, noFor the refractive index of ordinary light, neFor extraordinary ray
Refractive index, test condition：589nm、25±0.2℃；
The following examples 1~12 weigh liquid-crystal compounds in proportion respectively, are prepared into liquid crystal media.It is used various
Liquid crystal monomer can be synthesized by known method, or be obtained by commercial sources.
Preparing equipment and instrument used in liquid crystal media is：
(1) precise electronic balance (accuracy 0.1mg)
(2) stainless steel beaker：For weighing liquid crystal
(3) spoon：For adding monomer
(4) magnetic rotor：For stirring
(5) temperature control magnetic stirrer
The preparation method of liquid crystal media comprises the following steps：
(1) monomer used is put neatly in order；
(2) stainless steel beaker is placed on balance, contained monomer in stainless steel beaker with small spoon；
(3) successively by required weight addition monomer liquid crystal；
(4) adding the stainless steel beaker of honest material to be placed on heating and melting on magnetic agitation instrument；
(5) after mixture major part is melted in stainless steel beaker, a magnetic rotor is added into stainless steel beaker, will
Liquid crystal compound stirs, and is cooled to after room temperature and produces liquid crystal media.
The liquid crystal media of gained is filled between liquid crystal display two substrates and carries out performance test.The monomer of particular compound
Structure, consumption (weight percentage), the performance parameter test result of the liquid crystal media of gained are listed in table.1~12 pair of table
Answer embodiment 1~12.
The component proportion and its performance parameter of the liquid-crystal composition of the embodiment 1 of table 1
The component proportion and its performance parameter of the liquid-crystal composition of the embodiment 2 of table 2
The component proportion and its performance parameter of the liquid-crystal composition of the embodiment 3 of table 3
The component proportion and its performance parameter of the liquid-crystal composition of the embodiment 4 of table 4
The component proportion and its performance parameter of the liquid-crystal composition of the embodiment 5 of table 5
The component proportion and its performance parameter of the liquid-crystal composition of the embodiment 6 of table 6
The component proportion and its performance parameter of the liquid-crystal composition of the embodiment 7 of table 7
The component proportion and its performance parameter of the liquid-crystal composition of the embodiment 8 of table 8
The component proportion and its performance parameter of the liquid-crystal composition of the embodiment 9 of table 9
The component proportion and its performance parameter of the liquid-crystal composition of the embodiment 10 of table 10
The component proportion and its performance parameter of the liquid-crystal composition of the embodiment 11 of table 11
The component proportion and its performance parameter of the liquid-crystal composition of the embodiment 12 of table 12
From the performance parameter of the liquid-crystal composition shown in 1~embodiment of embodiment 12, liquid-crystal composition of the invention
With appropriate optical anisotropy, relatively low rotary viscosity, good low-temperature stability, larger K33 values, it is highly suitable for
The Active Matrix Display of active matrix display element, such as ECB, FFS or IPS, MVA effects；If in above-mentioned 12 embodiments institute
On the basis of the liquid-crystal composition shown, the polymerizable compound of formula V is added in addition, also the active square available for PVA or HVA effects
Battle array display.
Although (weight percent contains for the particular compound of the invention for only listing above-mentioned 12 embodiments and its proportioning consumption
Amount), and performance test has been carried out, but the liquid-crystal composition of the present invention can utilize this hair on the basis of above-described embodiment
The preferred liquid-crystal compounds of liquid-crystal compounds and formula I, II, III, IV representated by bright involved formula I, II, III, IV
Further expand and change, suitably adjusted by matching consumption to it, can reach the purpose of the present invention.
Claims (10)
1. a kind of liquid crystal media, it is characterised in that the dielectric that the liquid crystal media is included shown in one or more formulas I 1 is neutral
In dielectric neutral compound shown in compound and one or more formulas I 2, the dielectric shown in one or more formulas I 1
Property compound and one or more formulas I 2 shown in the gross weight percentage composition of dielectric neutral compound be 15-55%,
The liquid crystal media is the dielectric negativity compound shown in 1-60% formula II also comprising weight percentage,
Wherein,
H is expressed as cyclopenta；
R1、R2、R5Following 1., 2. in shown group any one is represented independently of one another：
1., carbon number is 1-7 straight chained alkyl,
2., 1. one or more-CH in shown group2- by-O- ,-CH=CH-CH3Or-CH=CH- replaces formed group；
R3、R4One in the straight chained alkyl that the straight chained alkyl or carbon number that expression carbon number is 1-7 independently of one another are 1-7-
CH2- by-O- ,-CH=CH-CH3Or-CH=CH- replaces formed group；
Z1、Z2Singly-bound ,-CH are represented independently of one another2-、-CH2CH2-、-CH2O- or-OCH2- in any one；
In various-(O) be may be the same or different, and singly-bound or-O- are represented independently of one another；
Represent any group in singly-bound or following groups：
Any group in following groups：
2. liquid crystal media according to claim 1, it is characterised in that the liquid crystal media is also comprising one or more formulas
Dielectric negativity compound shown in III
Wherein,
R6、R7Represent independently of one another it is following 1. -3. in shown group any one：
1., carbon number is 1-7 straight chained alkyl,
2., 1. one or more-CH in shown group2- by-O- ,-CH=CH-CH3Or-CH=CH- replaces formed group,
3., 1. or 2. in shown group one or more-H by-F ,-Cl ,-CH=CH2Or-CH=CH-CH3What substitution was formed
Group；
Z1、Z2Singly-bound ,-CH are represented independently of one another2-、-CH2CH2-、-CH2O- or-OCH2- in any one；
- (O) represents singly-bound or-O-；
Any group in singly-bound or following groups is represented independently of one another：
Represent any group in singly-bound or following groups：
N, m and o represent 0 or 1 independently of one another.
3. liquid crystal media according to claim 2, it is characterised in that described liquid crystal media is included -- weight percentage
Dielectric negativity compound shown in 1-80% general formula III.
4. according to any liquid crystal media in claim 1-3, it is characterised in that the liquid crystal media is also comprising a kind of or many
Plant the dielectric neutral compound shown in formula IV；
Wherein,
R8And R9Represent independently of one another it is following 1. -3. in shown group any one：
1. the unbranched alkoxy that the straight chained alkyl or carbon number that carbon number is 1-7 are 1-7,
2., 1. one or more-CH in shown group2- by-O- ,-CH=CH-CH3Or-CH=CH- replaces formed group,
3., 1. or 2. in shown group one or more-H by-F ,-Cl ,-CH=CH2Or-CH=CH-CH3What substitution was formed
Group；
Z3Independently represent singly-bound ,-CH2-、-CH2CH2- ,-COO- or-CH2Any one in O-；
Any group in singly-bound or following groups is represented independently of one another：
5. liquid crystal media according to claim 4, it is characterised in that in the dielectric shown in one or more formula IV
Property compound gross weight percentage composition be more than 0% and less than or equal to 10%.
6. according to any liquid crystal media in claim 1-3 or 5, it is characterised in that the liquid crystal media is also comprising one kind
Or the polymerizable compound shown in a variety of formulas V, the gross weight of the polymerizable compound shown in one or more formulas V
Percentage composition is more than 0% and less than or equal to 1%；
In the formula V
Phenyl, the phenylene in methyl generation, the sub- benzene in dimethyl generation are represented independently of one another
At least one of phenylene of base, the phenylene of fluoro and/or two fluoro；
N and m represent 1 or 2 independently of one another.
7. according to any liquid crystal media in claim 1-3 or 5, it is characterised in that the optics of described liquid crystal media it is each to
The opposite sex is in the range of 0.080~0.150.
8. according to any liquid crystal media in claim 2-3 or 5, it is characterised in that shown in one or more formulas II
Dielectric negativity compound be the one or more in the dielectric negativity compound shown in the f of formula II to the j of formula II
II a into the j of formula II,
R5Represent following 1., 2. in shown group any one：
1., carbon number is 1-7 straight chained alkyl,
2., 1. one or more-CH in shown group2- by-O- ,-CH=CH-CH3Or-CH=CH- replaces formed group,
- (O) represents singly-bound or-O-；
Any group in following groups is represented independently of one another：
Dielectric negativity compound shown in one or more general formula IIIs is the dielectric negativity chemical combination shown in formula III a to IIIm
One or more in thing
The IIIa into IIIm,
R5-R7Represent independently of one another it is following 1. -3. in shown group any one：
1., carbon number is 1-7 straight chained alkyl,
2., 1. one or more-CH in shown group2- by-O- ,-CH=CH-CH3Or-CH=CH- replaces formed group,
3., 1. or 2. in shown group one or more-H by-F ,-Cl ,-CH=CH2Or-CH=CH-CH3What substitution was formed
Group；
- (O) represents singly-bound or-O-；
Any group in singly-bound or following groups is represented independently of one another：
9. according to any liquid crystal media in claim 1-3 or 5, it is characterised in that the liquid crystal media additionally comprise with
Lower one or more of additives：Pleochroic dye, UV stabilizer, antioxidant, chiral to dopant, polymerization initiators, particulate and
Nano-particle, the additive component concentration is between 0%-1%.
10. any liquid crystal media is in active matrix display element, ECB, FFS or IPS, MVA, PVA in claim 1 to 9
Or the application in the Active Matrix Display of HVA effects.
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| CN201410530772.6A CN104263383A (en) | 2014-10-10 | 2014-10-10 | Liquid crystal medium and application |
| CN2014105307726 | 2014-10-10 | ||
| CN2014107511756 | 2014-12-10 | ||
| CN201410751175 | 2014-12-10 | ||
| CN201510013788.4A CN104513666B (en) | 2014-10-10 | 2015-01-12 | A kind of liquid crystal media and application |
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| CN108239547B (en) * | 2016-12-23 | 2022-02-01 | 江苏和成显示科技有限公司 | Liquid crystal composition with negative dielectric anisotropy and display device thereof |
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| CN107603640B (en) * | 2017-09-28 | 2023-10-31 | 江苏和成显示科技有限公司 | Liquid crystal composition and liquid crystal display device thereof |
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| CN109575939A (en) * | 2017-09-28 | 2019-04-05 | 江苏和成显示科技有限公司 | Liquid-crystal composition and its liquid crystal display device |
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| WO2009100204A1 (en) * | 2008-02-08 | 2009-08-13 | Vvi Bright, Inc. | Liquid crystals comprising cyclopentane groups |
| CN103030534B (en) * | 2012-11-23 | 2015-02-04 | 石家庄诚志永华显示材料有限公司 | Negative liquid crystal compound containing 2,3-difluorophenyl group, and preparation method and application thereof |
| CN103074073B (en) * | 2012-12-20 | 2015-03-11 | 石家庄诚志永华显示材料有限公司 | Negative dielectric anisotropic liquid crystal mixture |
| CN103254907B (en) * | 2013-04-23 | 2016-01-20 | 石家庄诚志永华显示材料有限公司 | Negative dielectric anisotropy liquid crystal composition |
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