CN108329929A - A kind of liquid-crystal composition and its application with extremely low negative dielectric anisotropic - Google Patents
A kind of liquid-crystal composition and its application with extremely low negative dielectric anisotropic Download PDFInfo
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- 239000004973 liquid crystal related substance Substances 0.000 title claims abstract description 95
- 239000000203 mixture Substances 0.000 title claims abstract description 72
- 150000001875 compounds Chemical class 0.000 claims abstract description 65
- RGOVYLWUIBMPGK-UHFFFAOYSA-N nonivamide Chemical compound CCCCCCCCC(=O)NCC1=CC=C(O)C(OC)=C1 RGOVYLWUIBMPGK-UHFFFAOYSA-N 0.000 claims abstract description 3
- 229910052731 fluorine Inorganic materials 0.000 claims description 18
- 125000001424 substituent group Chemical group 0.000 claims description 15
- 125000000217 alkyl group Chemical group 0.000 claims description 12
- 238000006467 substitution reaction Methods 0.000 claims description 12
- 125000003545 alkoxy group Chemical group 0.000 claims description 11
- 125000000843 phenylene group Chemical group C1(=C(C=CC=C1)*)* 0.000 claims description 8
- UHOVQNZJYSORNB-UHFFFAOYSA-N monobenzene Natural products C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 claims description 7
- 125000003342 alkenyl group Chemical group 0.000 claims description 6
- 125000003302 alkenyloxy group Chemical group 0.000 claims description 6
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 6
- 125000000113 cyclohexyl group Chemical group [H]C1([H])C([H])([H])C([H])([H])C([H])(*)C([H])([H])C1([H])[H] 0.000 claims description 6
- 229910052760 oxygen Inorganic materials 0.000 claims description 6
- 239000001301 oxygen Substances 0.000 claims description 6
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 claims description 6
- 125000000876 trifluoromethoxy group Chemical group FC(F)(F)O* 0.000 claims description 6
- 239000000126 substance Substances 0.000 claims description 3
- 230000004044 response Effects 0.000 abstract description 9
- 230000000694 effects Effects 0.000 description 9
- 239000010410 layer Substances 0.000 description 9
- 239000000758 substrate Substances 0.000 description 8
- 238000005516 engineering process Methods 0.000 description 6
- 239000007788 liquid Substances 0.000 description 5
- 239000011159 matrix material Substances 0.000 description 5
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 4
- 238000007796 conventional method Methods 0.000 description 4
- 239000011521 glass Substances 0.000 description 4
- 230000003287 optical effect Effects 0.000 description 4
- 238000006116 polymerization reaction Methods 0.000 description 4
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 3
- 230000005684 electric field Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000000178 monomer Substances 0.000 description 3
- 230000008707 rearrangement Effects 0.000 description 3
- 239000004065 semiconductor Substances 0.000 description 3
- 229910052710 silicon Inorganic materials 0.000 description 3
- 239000010703 silicon Substances 0.000 description 3
- 239000010409 thin film Substances 0.000 description 3
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 2
- HEDRZPFGACZZDS-UHFFFAOYSA-N Chloroform Chemical compound ClC(Cl)Cl HEDRZPFGACZZDS-UHFFFAOYSA-N 0.000 description 2
- UHYPYGJEEGLRJD-UHFFFAOYSA-N cadmium(2+);selenium(2-) Chemical compound [Se-2].[Cd+2] UHYPYGJEEGLRJD-UHFFFAOYSA-N 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 229910044991 metal oxide Inorganic materials 0.000 description 2
- 150000004706 metal oxides Chemical class 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 229910021420 polycrystalline silicon Inorganic materials 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 229920005591 polysilicon Polymers 0.000 description 2
- 239000000523 sample Substances 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
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- PXGOKWXKJXAPGV-UHFFFAOYSA-N Fluorine Chemical compound FF PXGOKWXKJXAPGV-UHFFFAOYSA-N 0.000 description 1
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- 239000004615 ingredient Substances 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910021421 monocrystalline silicon Inorganic materials 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- JMANVNJQNLATNU-UHFFFAOYSA-N oxalonitrile Chemical group N#CC#N JMANVNJQNLATNU-UHFFFAOYSA-N 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K19/00—Liquid crystal materials
- C09K19/04—Liquid crystal materials characterised by the chemical structure of the liquid crystal components, e.g. by a specific unit
- C09K19/42—Mixtures of liquid crystal compounds covered by two or more of the preceding groups C09K19/06 - C09K19/40
- C09K19/44—Mixtures of liquid crystal compounds covered by two or more of the preceding groups C09K19/06 - C09K19/40 containing compounds with benzene rings directly linked
Abstract
The invention discloses a kind of liquid-crystal compositions with extremely low negative dielectric anisotropic.The liquid-crystal composition contains the liquid-crystal compounds of general formula I, II, III, IV, V.The liquid-crystal composition has great dielectric anisotropy absolute value, higher clearing point, preferable stability and low temperature intersolubility, stronger anti-UV abilities, low viscosity, short response time and high VHR and resistivity, can be applied to the display patterns such as VA, MVA, PVA, FFS, PSVA, IPS, TFT.
Description
Technical field
The present invention relates to a kind of liquid-crystal composition, including it is a kind of simultaneously containing fluorine, cyanogen substituent group separate benzene nuclei compound and
It is applied, and liquid crystal material technical field is belonged to.
Background technology
LCD technology has been widely used for today's society needles of various sizes and shows.Small size shows such as calculator, hand
Machine, instrument etc.；Middle size shows such as computer monitor；Large scale shows such as TV.Liquid crystal display has high-resolution, high brightness
The advantages that being shown with panelized and it is light-weight, low energy consumption even Flexible Displays.Therefore, liquid crystal will continue to play the part of in information-technology age
Drill key player.
The liquid crystal display mode of early stage is that TN shows that people are combined using TN electrooptic effects and integrated circuit, are done
At liquid crystal display device (TN-LCD), bright prospects have been opened up for the application of liquid crystal.Since TN-LCD large-scale industrial productions
Slowly develop, STN-LCD and TFT-LCD technologies are gradually ripe, and display pattern type gradually increases, and occur having negative dielectric each
The liquid crystal media of anisotropy, such as ECB, DAP, VAN, MVA, ASV, PVA.
Current liquid crystal shows that typically TN types are shown, however this display extremely relies on contrast.In addition, many institutes of VA displays
It is known that there is wide viewing angle.The LC layers that VA is shown include the liquid crystal media being clipped between two transparent electrodes, and liquid crystal media has negative
Dielectric anisotropy.LC layers of molecule are arranged vertically with electrode surface under OFF state, have pre-tilt angle, electric when applying on the electrode
Pressure, LC molecular rearrangements are parallel with electrode surface.
OCB (optically compensated bend) displays are based on birefringence effect, and LC layers of bend alignment usually have
There is positive anisotropy.LC molecular rearrangements are perpendicular to electrode surface after applying voltage.In addition, OCB, which is shown, generally comprises one
A or multiple Birefringent optical retardation films prevent the light of flex layers under dark-state from penetrating.OCB is shown shows there is more wide viewing angle than TN
With the shorter response time.
IPS (in-plane switching) displays are also popular, and it includes the LC layers between two substrates, two electrode rows
It is listed on one of substrate, it is interlaced, it is in dressing structure.When applying voltage on electrode, LC interlayers generate in parallel
Electric field so that LC molecules rearrange.
Later, FFS (fringe-field switching) display be suggested, also on same substrate include two
A electrode is only with dressing structural arrangement there are one electrode, another electrode is unstructured with IPS display comparisons.It is a kind of strong
Fringing field therefore formed, electric field runs through layer structure adjacent to electrode edge, all very strong in horizontal and vertical direction branch.
The visual angle that IPS and FFS are shown is all very low to the dependence of contrast.
The arrangement of current VA display type LC molecules limits many fairly small fields in LC layers.It may in these fields
Rotation bit transition is will produce, is such as tilted.Compared with traditional VA is shown, shown with wider array of visual angle, no with the VA for tilting domain
Dependent on contrast and grayscale.Such VA shows the rearrangement that can be easier to realize molecule under ON state, therefore no longer needs
The friction for wanting liquid crystal cell can control the orientation of pre-tilt angle by the special designing to electrode.
MVA (multidomain vertical alignment) displays are to cause part by the electrode with protrusion
Inclined mode is shown.LC molecules are arranged in parallel with electrode surface in different directions different zones after applying voltage, prevent
Revolve bit transition.Although this arrangement improves display view angle, reduce light transmission.With the further development of MVA, only one
Protrusion is used in lateral electrode, and another lateral electrode has slit, is conducive to the transmission of light.Gap electrode is formed after applying voltage
Non-uniform electric field still can control switch state.The transmitance of light in order to further increase can increase separation slit and protrusion
Object, but the extension of response time can be caused.Bump during PVA is shown on electrode is wholly redundant, electrode by narrow slit structure,
Which increase contrasts, improve light transmission rate, but this technology is very difficult, and this display influences also more mechanical external force
It is sensitive.For many application fields such as display, TV screen, need the short response time, high contrast, display it is bright
Degree.
PSA shows that liquid crystal media includes liquid crystalline phase and low dose of polymerizable compound, quality accounting 0.2-0.4%.By liquid
After crystalline medium pours into display box, make polymerizable compound that polymerization crosslinking occur by UV polymerizations, and then by applying electricity on the electrode
Pressure is shown.The polymer monomer added is commonly referred to as activated monomer or " RM " (Reactive Mesogens).
PSA patterns are widely used in various traditional liquid crystal types and show.Such as：PS-VA(polymer
sustained vertically alignment),PS-OCB(optically compensated bend),PS-IPS(in-
Plane switching), PS-FFS (fringe-field switching), PS-TN (twisted nematic), in PSA-
The polymerization process of polymerizable compound occurs under power-up during VA and PSA-OCB is shown, shows to power up in PSA-IPS and send out
Raw polymerization process.PSA patterns can form pre-tilt angle, and PSA-OCB is shown, warp architecture is very stable to be not required to add offset voltage.
PSA-VA shows that pre-tilt angle has positive influence to the response time.
Liquid crystal applies the optical characteristics generation invertibity variation before and after voltage as dielectric.Liquid crystal display uses various each
The electrooptic effect of sample.Special liquid crystal media is needed for novel VA displays.As the liquid crystal media of negative dielectric anisotropic needs
With the VHR after high UV exposures.The LC phases shown for electric light need to meet a series of requirements.It the particularly important is for water
Point, the chemical stability of air and physical stability such as thermostabilization, counter infrared ray radiation, visible light and UV light region and direct current
Or AC field.Furtherly, the industrial applications of liquid crystalline phase need suitable temperature range and have low viscosity.
The MLC of ECB effects is shown.The liquid crystal media of low VHR cannot be used for projection type after being exposed with UV
Display mode.It, can be with shape such as with high resistivity while wide operation temperature, short response time, low threshold voltage
At various grayscale.VA, which is shown, to be shown with more wide viewing angle compared with ECB independent of contrast.
(MLC) is shown for matrix liquid crystal, with the separate control individual pixel of non-linear elements, such as transistor.
Here there are two types of types for activity matrix：1.MOS (metal-oxide semiconductor (MOS)) transistor, which is attached on silicon wafer, is used as substrate；2.
Thin film transistor (TFT) (TFT) attachment is used as substrate on a glass.The first situation, electrooptic effect are often dynamic scattering or guest
Main effect, monocrystalline silicon constrains the size of display as the use of baseplate material, or even will produce various portion in junction
The problem of dividing display.The second situation has more possibility, and electrooptic effect is usually TN effects, TFT include semi-conducting material such as
Cadmium selenide is polycrystalline or unformed silicon.The whole world is having made significant effort research latter technique at present.
TFT display matrixes are applied in glass substrate, and another glass substrate loads transparent electrode.TFT respective pixel electrodes
Size, very little do not have undesirable influence for image.This technology can extend to be shown for all compatible color images,
The splicing of middle red, green, blue filter can be realized in such a way that each filter element corresponds to switchable pixel.
Any type liquid-crystal compounds no so far disclosure satisfy that all demands.Generally need 2 to 25 kinds of monomers
Compound mixing preferably may be used as liquid crystalline phase for the mixture of 3 to 18 kinds of compounds.However ideal liquid crystalline phase can not lead to
It crosses this mode to be simply obtained, this is because liquid crystal material needs have significantly negative dielectric anisotropic and enough long-time
Stability.
About liquid crystal media and the application of liquid crystal display, especially by the driven with active matrix of various modes.Current tendency
It is shown in the active matrix including thin film transistor (TFT) or varistor.Such AMD uses various active electrical
Sub switch element.It is most widely to use triple-pole switch element, such as MOS (metal oxide silicium) either thin film transistor (TFT) or pressure
Quick resistance.Various semi-conducting materials, polysilicon, cadmium selenide are applied in TFT, especially polysilicon or unformed silicon.Compared to
Three pole electronic switch elements, two-photo pole switch matrix of elements such as MIM (metal-insulator-metal type) diode, cyclic annular diode or
Person's opposed diodes can also apply in AMD.
Too long for probe response time early period of liquid crystal, viscosity is also required to improve.This will be by the shadow of rotary viscosity γ 1
Value when sound, especially low temperature.The reduction of kinematic viscosity ν 20 can make vertical orientation edge arrange liquid crystal (such as ECB and
VAN is shown) there is the very short corresponding time.
Invention content
The present invention proposes a kind of liquid-crystal composition with extremely low negative dielectric anisotropic.The liquid-crystal composition has pole
The liquid-crystal composition of big dielectric anisotropy absolute value, higher clearing point, good low-temperature stability and anti-UV abilities.
The present invention provides a kind of liquid-crystal composition with extremely low negative dielectric anisotropic, which is characterized in that the liquid
Crystal composite includes：
Account at least one of liquid-crystal compounds group shown in the general formula I of the 1-50% of the liquid-crystal composition gross mass
Compound；
Account at least one in liquid-crystal compounds group shown in the general formula II of the 1-50% of the liquid-crystal composition gross mass
Kind compound；
Account at least one in liquid-crystal compounds group shown in the general formula III of the 1-30% of the liquid-crystal composition gross mass
Kind compound；
Wherein, R1、R2、R3、R4、R5、R6The separate substitution for choosing C1~C15 or unsubstituted linear chain or branched chain
The substitution of alkyl or alkoxy or C2~C15 or unsubstituted linear chain or branched chain alkenyl or alkenyloxy group；Wherein substituent group is selected from
F, Cl, Br, I, CN, OH ,-CH=CH-, C ≡ C-；
The separate expression cyclohexyl of ring A, B, C, D, E, F, G, phenylene, phenyl, oxygen-containing six ring group or containing taking
The phenylene of Dai Ji；Wherein substituent group is selected from F, Cl, Br, I, CN；
L1、L2、L3、L4、L5、L6The separate alkyl for representing F, CN, H, Cl, Br, I, C1-C3 or alkoxy, CF3、
Or CF3O；
M, n is separate indicates 0,1 or 2；
Z is selected from second diyl ,-C ≡ C- ,-CH=CH- ,-COO- ,-OCO- ,-OOC- ,-CF2O- or-CH2O-。
Preferably, the liquid-crystal composition also includes：Account for the general formulae IV institute of the 1-50% of the liquid-crystal composition gross mass
At least one of the liquid-crystal compounds group shown compound；
R7、R8The separate substitution for choosing C1~C15 or unsubstituted linear or branched alkyl group or alkoxy or
The substitution of C2~C15 or unsubstituted linear chain or branched chain alkenyl or alkenyloxy group；Wherein substituent group be selected from F, Cl, Br, I, CN,
OH ,-CH=CH-, C ≡ C-；
H, the separate expression cyclohexyl of I, J, K, phenylene, phenyl, oxygen-containing six ring group or the Asia containing substituent group
Phenyl；Wherein substituent group is selected from F, Cl, Br, I, CN；
L7、L8、L9、L10、L11、L12The separate alkyl for representing F, CN, H, Cl, Br, I, C1-C3 or alkoxy,
CF3Or CF3O。
Preferably, the liquid-crystal composition also includes：Account for V institute of general formula of the 1-50% of the liquid-crystal composition gross mass
At least one of the liquid-crystal compounds group shown compound；
Wherein, R9、R10The separate substitution for choosing C1~C15 or unsubstituted linear or branched alkyl group or alcoxyl
The substitution of base or C2~C15 or unsubstituted linear chain or branched chain alkenyl or alkenyloxy group；Wherein substituent group be selected from F, Cl, Br, I,
CN, OH ,-CH=CH-, C ≡ C-；
M, separate expression cyclohexyl, phenylene, phenyl, oxygen-containing six ring group or the sub- benzene containing substituent group of N, Q
Base；Wherein substituent group is selected from F, Cl, Br, I, CN；
L13、L14、L15、L16The separate alkyl for representing F, CN, H, Cl, Br, I, C1-C3 or alkoxy, CF3Or
CF3O；
P is separate to indicate 0,1 or 2；
Z is selected from second diyl ,-C ≡ C- ,-CH=CH- ,-COO- ,-OCO- ,-OOC- ,-CF2O- or-CH2O-。
Preferably, it is 1-30% to have the content accounting of compounds of formula I in a liquid crystal composition, is more preferably 5-
20%.Preferably, the content accounting of the compound with general formula II in a liquid crystal composition is 1-40%, is more preferably 5-
20%.
The general formula II includes at least one of liquid-crystal compounds group chemical combination shown in II B of II A of general formula and general formula
Object；
Specifically, compound shown in the compound of the general formula II structural formula chosen from the followings：
Preferably, the content accounting of the compound with general formulae IV in a liquid crystal composition is 1-20%, is more preferably 1-
10%.
The compound of the general formulae IV includes in liquid-crystal compounds group shown in general formulae IV A, general formulae IV B and general formulae IV C
At least one compound；
Specifically, compound shown in the compound of general formulae IV structural formula chosen from the followings：
More specifically, compound shown in the compound of general formulae IV structural formula chosen from the followings：
Preferably, the content accounting of the compound with general formula V in a liquid crystal composition is 1-40%, is more preferably 1-
20%.
The compound of the general formula V includes in liquid-crystal compounds group shown in V C of V A of general formula, V B of general formula and general formula
At least one compound；
Specifically, compound shown in the compound of the general formula V structural formula chosen from the followings：
Liquid-crystal composition provided by the invention has extremely low threshold voltage, great dielectric anisotropy absolute value good
Good stability and low temperature intersolubility, higher clearing point, wider nematic temperature range have the shorter response time,
High VHR and resistivity, UV resistance is good, is mainly used in the display patterns such as VA, MVA, PSA, IPS, FFS, TFT.
Liquid-crystal composition provided by the invention has nematic temperature range：-40-120℃.- 40 DEG C of low temperature, -30 DEG C, -
It is stored respectively 1 month or more at 20 DEG C, 0 DEG C.It is shown under high temperature normally, less than 10 DEG C of clearing point or less without display bad phenomenon.
Kinematic viscosity of the liquid-crystal composition provided by the invention at 20 DEG C uses rotary rotor viscosity meter, liquid crystal
ν 20≤70mPas of the kinematic viscosity of composition at 20 DEG C.
Liquid-crystal composition △ n provided by the invention are 0.07~0.17.
Rotary viscosity γs 1 of the liquid-crystal composition dielectric anisotropy △ ε provided by the invention at -3~-13,20 DEG C≤
150mPa·s。
Liquid-crystal composition provided by the invention has extremely low threshold voltage, in 1.0-2.5V.With before high UV and UV
VHR afterwards.
Liquid-crystal composition provided by the invention is prepared using conventional method, at a proper temperature by two or more
Compound mixes；Or each component is dissolved in organic solvent, such as acetone, chloroform, methanol, then pass through distillation
Method removes solvent.
Liquid-crystal composition provided by the invention also needs to add additive appropriate, such as anti ultraviolet agent, antistatic agent, antioxygen
Agent, antifoaming agent etc..
Specific implementation mode
Illustrate the present invention below in conjunction with specific embodiment.Example below is the example of the present invention, for explaining this hair
It is bright but do not limit the present invention.Without departing from present subject matter or range, other groups in present inventive concept can be carried out
It closes and various improvement.
For ease of expressing, in following embodiment, the unit structure of liquid-crystal compounds is indicated with the code listed by table 1：
The group structure code of 1 liquid-crystal compounds of table
Illustrate and explain the present invention below in conjunction with formulation examples, but do not limit the present invention, without departing from present subject matter or
In the case of range, other combinations and the various improvement in present inventive concept can be carried out.
Each ingredient employed in following embodiment can be obtained by conventional method.
The preparation of liquid-crystal composition is all made of conventional method acquisition in following embodiment.
Test obtains the various performance parameters of liquid-crystal composition in following embodiment by conventional method, liquid crystal display
Material includes the glass substrate of upper layer and lower layer load transparent electrode and is clipped in liquid crystal media therein.
Percentage in embodiment represents weight percent unless otherwise specified.
Cp (DEG C) represents clearing point.
△ n represent optical anisotropy at 20 DEG C, 589nm.
△ ε represent dielectric anisotropy at 25 DEG C.
γ 1 (mPas) represents rotary viscosity at 20 DEG C.
Vo (V) represents 20 DEG C of lower threshold voltages.
Embodiment E1：
The formula composition and parameter of 2 embodiment E1 of table
Embodiment E2：
The formula composition and parameter of 3 embodiment E2 of table
Embodiment E3：
The formula composition and parameter of 4 embodiment E3 of table
Embodiment E4：
The formula composition and parameter of 5 embodiment E4 of table
Embodiment E5：
The formula composition and parameter of 6 embodiment E5 of table
Embodiment E6：
The formula composition and parameter of 7 embodiment E6 of table
Embodiment E7：
The formula composition and parameter of 8 embodiment E7 of table
Embodiment E8：
The formula composition and parameter of 9 embodiment E8 of table
Embodiment E9：
The formula composition and parameter of 10 embodiment E9 of table
Embodiment E10：
The formula composition and parameter of 11 embodiment E10 of table
Embodiment E11：
The formula composition and parameter of 12 embodiment E11 of table
Embodiment E12：
The formula composition and parameter of 13 embodiment E12 of table
Embodiment E13：
The formula composition and parameter of 14 embodiment E13 of table
Embodiment E14：
The formula composition and parameter of 15 embodiment E14 of table
Embodiment E15：
The formula composition and parameter of 16 embodiment E15 of table
Embodiment E16：
The formula composition and parameter of 17 embodiment E16 of table
Embodiment E17：
The formula composition and parameter of 18 embodiment E17 of table
Embodiment E18：
The formula composition and parameter of 19 embodiment E18 of table
Embodiment E19：
The formula composition and parameter of 20 embodiment E19 of table
Embodiment E20：
The formula composition and parameter of 21 embodiment E20 of table
With reference to above example, liquid-crystal composition proposed by the invention has larger dielectric anisotropy absolute value,
Higher clearing point, optical anisotropy appropriate is wider to list temperature range, can be used for VA, MVA, PVA, PSVA,
The display patterns such as IPS, FFS, TFT.
The present invention relates to a kind of liquid crystal medias, have negative dielectric anisotropy, clearing point ＞ 70 based on polar compound
℃。
Present invention can assure that display there can be the short response time at high or extremely low temperature, improve simultaneously
Stability does not especially have image sticking phenomenon by prolonged operation.
Above example only for protrusion illustrate the features of the present invention, be not intended to limit the present invention the scope of application, without departing from
It is modified or improved to what the present invention made on the basis of spirit of that invention, belongs to the scope of protection of the invention.
Claims (10)
1. a kind of liquid-crystal composition with extremely low negative dielectric anisotropic, which is characterized in that the liquid-crystal composition includes：
Account at least one of liquid-crystal compounds group chemical combination shown in the general formula I of the 1-50% of the liquid-crystal composition gross mass
Object；
At least one of liquid-crystal compounds group shown in the general formula II of the 1-50% of the liquid-crystal composition gross mass is accounted for change
Close object；
At least one of liquid-crystal compounds group shown in the general formula III of the 1-30% of the liquid-crystal composition gross mass is accounted for change
Close object；
Wherein, R1、R2、R3、R4、R5、R6The separate substitution for choosing C1~C15 or unsubstituted linear or branched alkyl group
Or substitution or unsubstituted linear chain or branched chain alkenyl or the alkenyloxy group of alkoxy or C2~C15；Wherein substituent group be selected from F,
Cl, Br, I, CN, OH ,-CH=CH-, C ≡ C-；
The separate expression cyclohexyl of ring A, B, C, D, E, F, G, phenylene, phenyl, oxygen-containing six ring group contain substituent group
Phenylene；Wherein substituent group is selected from F, Cl, Br, I, CN；
L1、L2、L3、L4、L5、L6The separate alkyl for representing F, CN, H, Cl, Br, I, C1-C3 or alkoxy, CF3Or
CF3O；
M, n is separate indicates 0,1 or 2；
Z is selected from second diyl ,-C ≡ C- ,-CH=CH- ,-COO- ,-OCO- ,-OOC- ,-CF2O- or-CH2O-。
2. the composition according to claim 1 with negative dielectric anisotropic, which is characterized in that the liquid-crystal composition
Also include：Account at least one of liquid-crystal compounds group shown in the general formulae IV of the 1-50% of the liquid-crystal composition gross mass
Compound；
R7、R8The separate substitution for choosing C1~C15 or unsubstituted linear or branched alkyl group or alkoxy or C2~
The substitution of C15 or unsubstituted linear chain or branched chain alkenyl or alkenyloxy group；Wherein substituent group is selected from F, Cl, Br, I, CN, OH ,-CH
=CH-, C ≡ C-；
H, separate expression cyclohexyl, phenylene, phenyl, oxygen-containing six ring group or the sub- benzene containing substituent group of I, J, K
Base；Wherein substituent group is selected from F, Cl, Br, I, CN；
L7、L8、L9、L10、L11、L12The separate alkyl for representing F, CN, H, Cl, Br, I, C1-C3 or alkoxy, CF3Or
CF3O。
3. the composition according to claim 1 or 2 with negative dielectric anisotropic, which is characterized in that the liquid crystal group
Closing object also includes：It accounts in liquid-crystal compounds group shown in the general formula V of the 1-50% of the liquid-crystal composition gross mass at least
A kind of compound；
Wherein, R9、R10The separate substitution for choosing C1~C15 or unsubstituted linear or branched alkyl group or alkoxy,
Or substitution or unsubstituted linear chain or branched chain alkenyl or the alkenyloxy group of C2~C15；Wherein substituent group be selected from F, Cl, Br, I, CN,
OH ,-CH=CH-, C ≡ C-；
M, the separate expression cyclohexyl of N, Q, phenylene, phenyl, oxygen-containing six ring group or the phenylene containing substituent group；
Wherein substituent group is selected from F, Cl, Br, I, CN；
L13、L14、L15、L16The separate alkyl for representing F, CN, H, Cl, Br, I, C1-C3 or alkoxy, CF3Or CF3O；
P is separate to indicate 0,1 or 2；
Z is selected from second diyl ,-C ≡ C- ,-CH=CH- ,-COO- ,-OCO- ,-OOC- ,-CF2O- or-CH2O-。
4. the composition according to claim 1 with negative dielectric anisotropic, which is characterized in that the change of the general formula I
Close compound shown in object structural formula chosen from the followings：
5. the composition according to claim 1 with negative dielectric anisotropic, which is characterized in that the general formula II includes
At least one of liquid-crystal compounds group compound shown in II B of II A of general formula and general formula；
Specifically, compound shown in the compound of the general formula II structural formula chosen from the followings：
6. the composition according to claim 1 with negative dielectric anisotropic, which is characterized in that the change of the general formula III
It includes at least one of liquid-crystal compounds group compound shown in general formula III A, general formula III B and general formula III C to close object；
Specifically, compound shown in the compound of general formula III structural formula chosen from the followings：
7. the composition according to claim 1 with negative dielectric anisotropic, which is characterized in that the change of the general formulae IV
It includes at least one of liquid-crystal compounds group compound shown in general formulae IV A, general formulae IV B and general formulae IV C to close object；
Specifically, compound shown in the compound of general formulae IV structural formula chosen from the followings：
8. the composition according to claim 1 with negative dielectric anisotropic, which is characterized in that the change of the general formula V
It includes at least one of liquid-crystal compounds group compound shown in V C of V A of general formula, V B of general formula and general formula to close object；
Specifically, compound shown in the compound of the general formula V structural formula chosen from the followings：
9. a kind of liquid crystal display device, which is characterized in that include it is according to any one of claims 1 to 6 have it is extremely low
Negative dielectric anisotropy liquid crystal composition.
10. a kind of liquid-crystal composition as claimed in claim 7 is in VA, MVA, PVA, FFS, PSVA, IPS or TFT display pattern
Liquid crystal display element field application.
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| CN111073662A (en) * | 2018-10-22 | 2020-04-28 | 达兴材料股份有限公司 | Liquid crystal composition and liquid crystal display device using same |
| CN111607412A (en) * | 2020-06-11 | 2020-09-01 | 烟台显华化工科技有限公司 | High-gradient fast-response negative dielectric anisotropy liquid crystal composition and application thereof |
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| CN111607412A (en) * | 2020-06-11 | 2020-09-01 | 烟台显华化工科技有限公司 | High-gradient fast-response negative dielectric anisotropy liquid crystal composition and application thereof |
| CN111607412B (en) * | 2020-06-11 | 2023-04-07 | 烟台显华化工科技有限公司 | High-gradient fast-response negative dielectric anisotropy liquid crystal composition and application thereof |
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