CN105602577B - Positive dielectric anisotropy liquid crystal composition and its liquid crystal display cells or liquid crystal display - Google Patents
Positive dielectric anisotropy liquid crystal composition and its liquid crystal display cells or liquid crystal display Download PDFInfo
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- CN105602577B CN105602577B CN201610060312.0A CN201610060312A CN105602577B CN 105602577 B CN105602577 B CN 105602577B CN 201610060312 A CN201610060312 A CN 201610060312A CN 105602577 B CN105602577 B CN 105602577B
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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
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
Abstract
The invention discloses a kind of positive dielectric anisotropy liquid crystal composition and the display element or display using the liquid-crystal composition, one or more formula I, formula II, general formula III compound are contained in liquid-crystal composition,
Description
Technical field
The invention belongs to liquid-crystal compounds, and in particular to a kind of positive dielectric anisotropy liquid crystal composition, and application should
The liquid crystal display cells or liquid crystal display of liquid-crystal composition.
Background technology
Display is the process for electric signal (data message) being changed into visible light (visual information), and the equipment for completing display is
Man-machine interface (Man-Machine Interface, MMI), flat-panel monitor (Flat Panel Display, FPD) is current
A class display device the most popular.Liquid crystal display (Liquid Crystal Display, LCD) is opened earliest in FPD
Issue, and the product being commercialized.At present, Thin Film Transistor-LCD (Thin Film Transistor Liquid
Crystal, TFT-LCD) have become LCD application in main product.
The very long phase of basic research of the development experience of TFT-LCD, is realizing big production, after commercialization, TFT-LCD
Product is so that its is frivolous, environmentally friendly, high-performance the advantages of, its size is done bigger and bigger, using more and more wider.The either mobile phone of small size
Screen or large-sized notebook computer (Notebook PC) or monitor (Monitor), and the LCD TV for maximizing
(LCDTV), it is found everywhere the application of TFT-LCD.The early stage TFT-LCD products of commercialization employ twisted-nematic (Twisted substantially
Nematic, TN) type display pattern, its greatest problem is not big enough visual angle.
The viewing angle problem of LCD is determined in itself by the operation principle of liquid crystal.Liquid crystal molecule formula is bar-shaped, different molecules
Arrangement mode correspond to different optics anisotropics.Incident light and liquid crystal molecule angle are smaller, and birefringence is just smaller；Otherwise
Birefringence is bigger.Deviate light and liquid crystal molecule sensing that display screen normal direction incides liquid crystal cell at different angles
The angle of arrow is different, thus results under different visual angles, and effective optical path difference Δ nd is different.And the optimal light path difference of liquid crystal cell is by vertical
What the straight normal direction in box was designed, for the light of oblique incidence, minimum transmittance increases with the increase of angle, and contrast is just
Can decline.When angle is sufficiently large, or even the phenomenon that contrast inversion occurs.
At present, it has been proposed that many kinds solve the method for viewing angle problem such as：Optics seldom plays (OCB), coplanar conversion
Pattern (IPS), fringe field switching mode (FFS) and multidomain homeoptropic pattern (MVA) etc..
They have respective advantage and disadvantage, the characteristics of MVA patterns have high-contrast and quick response, it require that one
Individual biaxial compensation film and two ellipsoidal polarizing plates, thus it is relatively costly.Ocb mode is difficult to keep stabilization control with alternating voltage
System, different to tri- kinds of monochromatic transmitances of R, G, B, in addition in the case of field-free, the molecule in liquid crystal cell is by parallel
Arranged in the direction of substrate, in order to realize bend alignment, need on box plus several seconds voltage carry out it is preset, then can be relatively low
Voltage under maintain this arrangement mode, this is to using making troubles, IPS patterns need only to linear polarizer without compensation
Film, simply its response speed is too slow, it is impossible to the picture of the quick motion of display.Because IPS patterns and FFS mode make simply simultaneously
And having a visual angle very wide, they are into can improve viewing angle characteristic and realize the most attractive method of large-area displays.
IPS patterns can use positivity liquid crystal or negative liquid crystal, because light transmittance saturation voltage is with the increasing of the absolute value of Δ ε
Reduce greatly, so the light transmittance saturation voltage of positivity liquid crystal is lower than negative liquid crystal, and response speed is faster, but it is negative
Property liquid crystal it is more quite a lot of than the light transmittance of positivity liquid crystal, mainly due to the rotation under the electric field of positive and negative liquid crystal it is different caused by.
Be entrained in one or more negative liquid crystal monomer in the IPS liquid crystal of positive dielectric anisotropic by liquid-crystal composition, order
People has surprisingly found that, by this kind of doping pattern, can increase ε ∥ and the ε ⊥ of liquid crystal in the case where maintaining Δ ε constant, its
Middle Δ ε=ε ∥-ε ⊥, Δ ε is dielectric anisotropy, and ε ∥ are that, parallel to the dielectric constant on molecular axis direction, ε ⊥ are vertical
In the dielectric constant on molecular axis direction, the liquid crystal of Δ ε ＞ 0 is positivity liquid crystal, and the liquid crystal of Δ ε ＜ 0 is negative liquid crystal.
Transmitance formula according to IPS patterns, transmittance (transmitance) ∝ Δs ε/ε ⊥.(∝ represents inverse proportion
Relation).By the way that by the IPS liquid crystal of the above-mentioned negative liquid crystal monomer positive dielectric anisotropy of doping, the liquid crystal group for obtaining can be made
Compound is keeping the quick response low driving voltage of positivity IPS liquid crystal, clearing point higher, relatively low rotary viscosity, suitable
While the advantages of optical anisotropy and suitable dielectric anisotropic, the transmitance of liquid crystal display is also greatly enhanced.
The content of the invention
The technical problems to be solved by the invention there is provided a kind of positive dielectric anisotropy liquid crystal composition, and use
The liquid crystal display cells or liquid crystal display of the liquid-crystal composition.The liquid-crystal composition for obtaining is keeping the quick sound of positivity liquid crystal
Should, low driving voltage, clearing point higher, relatively low rotary viscosity, suitable optical anisotropy and suitable dielectric it is each
While the advantages of item opposite sex, the transmitance of liquid crystal display is also greatly enhanced.
In order to solve the above technical problems, the technical solution adopted in the present invention is：
Positive dielectric anisotropy liquid crystal composition, it is characterised in that：The liquid-crystal composition includes one or more formula I
Shown compound group into the first component, comprising compound group shown in one or more formula II into the second component, comprising one
Kind or compound group shown in various general formula IIIs into the 3rd component,
Wherein,
R1、R11、R2It is respectively selected from the one of which of the straight chained alkyl that carbon number is 1~5, any of which is discontinuous-
CH2- can be replaced by-O-,
R3、R4The one of which of the straight-chain alkenyl that carbon number is 2~6 is respectively selected from,
L1、L2H or F is respectively selected from, and wherein at least one represents F.
Technical solution of the present invention further improvement is that：In the liquid-crystal composition, the quality percentage of the first component contains
It is 1~45% to measure, and the weight/mass percentage composition of the second component is 10~55%, and the weight/mass percentage composition of the 3rd component is 1~45%.
Technical solution of the present invention further improvement is that：Compound shown in the formula I is specially shown in formula I 1~I 5
Compound,
Compound shown in the formula II is specially the compound shown in formula II 1~II 2,
Compound shown in the general formula III is specially the compound shown in formula III 1~III 2,
Wherein,
R11Selected from the one of which of the straight chained alkyl that carbon number is 1~5, the discontinuous-CH of any of which2- can be by-O-
Substitution,
R2Selected from the one of which of the straight chained alkyl that carbon number is 1~5, the discontinuous-CH of any of which2- can be by-O-
Substitution,
R4Selected from the one of which of the straight-chain alkenyl that carbon number is 2~6.
Preferably, the compound shown in the formula I is specially the compound shown in 1-1~I 5-5 of formula I,
Compound shown in the formula II is specially the compound shown in 1-1~II 2-5 of formula II,
Compound shown in the general formula III is specially the compound shown in 1-1~III 2-2 of formula III,
Technical solution of the present invention further improvement is that：The liquid-crystal composition also includes compound group shown in general formulae IV
Into the 4th component, in the liquid-crystal composition weight/mass percentage composition of the 4th component be 0~15%,
Wherein,
R5Selected from the straight chained alkyl that carbon number is 1~5, the one of which of the straight-chain alkenyl that carbon number is 2~5,
R6Selected from the one of which of the straight chained alkyl that carbon number is 1~5.
Technical solution of the present invention further improvement is that：Compound shown in the general formulae IV is specially the institute of formula IV 1~IV 8
The compound for showing,
Wherein,
R51Selected from the one of which of the straight chained alkyl that carbon number is 1~5,
R6Selected from the one of which of the straight chained alkyl that carbon number is 1~5.
Preferably, the compound shown in the general formulae IV is specially the compound shown in 1-1~IV 8-5 of formula IV,
The liquid-crystal composition also comprising compound group shown in formula V into the 5th component, in the liquid-crystal composition,
The weight/mass percentage composition of the 5th component is 0~10%,
Wherein,
R7Selected from the straight chained alkyl that carbon number is 1~5, the one of which of the straight-chain alkenyl that carbon number is 2~5,
R8Selected from the one of which of the straight chained alkyl that carbon number is 1~5.
Technical solution of the present invention further improvement is that：Compound shown in the formula V is specially formula V 1~V 5
Shown compound,
Wherein,
R71Selected from the one of which of the straight chained alkyl that carbon number is 1~5,
R8Selected from the one of which of the straight chained alkyl that carbon number is 1~5.
Preferably, the compound shown in the formula V is specially the compound shown in 1-1~V 5-2 of formula V,
Technical solution of the present invention further improvement is that：The liquid-crystal composition also includes compound group shown in formula VI
Into the 6th component, in the liquid-crystal composition weight/mass percentage composition of the 6th component be 0~45%.
Wherein,
R9Selected from the one of which of the straight chained alkyl that carbon number is 1~5, and R9In a CH2Can by cyclopenta,
Cyclobutyl, cyclopropyl are substituted；
Represent independently of one another： One of which；
A represents 1,2.
Preferably, the compound shown in the formula VI is specially the compound shown in formula VI 1~VI 3,
R9 selected from the straight chained alkyl that carbon number is 1~5 one of which, and a CH2 in R9 can by cyclopenta,
Cyclobutyl, cyclopropyl are substituted.
It is further preferred that the compound shown in the formula VI is specially the compound shown in 1-1~VI 3-5 of formula VI,
Technical solution of the present invention further improvement is that：In the liquid-crystal composition, the quality percentage of the first component contains
It is 5~10% to measure, and the weight/mass percentage composition of the second component is 30~50%, and the weight/mass percentage composition of the 3rd component is 5~15%,
The weight/mass percentage composition of the 4th component is 5~15%, and the weight/mass percentage composition of the 5th component is 5~10%, the matter of the 6th component
Amount percentage composition is 20~40%.
The invention also discloses liquid crystal display cells or liquid crystal containing above-mentioned positive dielectric anisotropy liquid crystal composition
Display, the liquid crystal display cells or liquid crystal display are active matrix display element or display, passive matrix display unit
Part or display.
Liquid-crystal composition disclosed by the invention is quick response, low driving voltage with positivity IPS liquid crystal, higher clear
The advantages of bright spot, relatively low rotary viscosity, suitable optical anisotropy and suitable dielectric anisotropic, also greatly carry
The transmitance of liquid crystal display high.
Liquid-crystal composition disclosed by the invention, the different proportion of each composition can show slightly discrepant performance, such as be situated between
Electrical anisotropy Δ ε, optical anisotropy Δ n, the nematic phase of liquid crystal are converted into stabilization under the transition temperature of liquid point CP, low temperature
Property all can difference, can apply to different types of display device, but it is identical the characteristics of be its rotary viscosity γ1Compared with
It is low.It is applied to liquid crystal display device, it is possible to achieve quick response.
Liquid crystal media provided by the present invention, it can in addition contain comprising concentration of component between 0.01%-0.5% with next
Plant or several additives：UV stabilizer, antioxidant, chiral are to dopant, polymerization initiators.
Liquid-crystal composition of the invention is particularly suitable for liquid crystal display, especially the display of active array addressing and
The liquid crystal display of TN, IPS, FFS type.
Specific embodiment
With reference to specific embodiment, the present invention is further elaborated, but the present invention is not limited to following examples.Institute
State method and be conventional method unless otherwise instructed.The raw material can be obtained from open commercial sources unless otherwise instructed.Institute
State percentage unless otherwise instructed, be mass percent.
In following embodiments, CP represents clearing point, is directly determined using the micro- thermal analyzers of WRX-1S, sets heating rate
It is 3 DEG C/min.Δ n represents optical anisotropy (589nm, 20 DEG C), Δ ε represent dielectric anisotropy (25 DEG C, 1KHz,
HP4284A, 5.2 microns of left-handed boxes of TN), γ1Rotary viscosity (mpas) when representing 20 DEG C, VHR (%) represents electric charge conservation rate
(5V, 60Hz, 20 DEG C), ρ (× 1013Ω cm) represent resistivity (20 DEG C), the tester and resistance of voltage retention VHR (%)
Rate ρ (× 1013Ω cm) it is TOYO06254 and TOYO6517 type liquid crystal evaluation of physical property system (20 DEG C of test temperature, time
16ms, testing cassete is 7.0 microns).
Liquid crystal monomer structure in the embodiment of the present invention represents with code, liquid crystal ring structure, end group, the code of linking group
Method for expressing see the table below (one), table (two).
Table (one)：The corresponding code of ring structure
Table (two)：End group and the corresponding code for linking group
| End group with link group | Correspondence code |
| CnH2n+1- | n |
| CnH2n+1O- | nO |
| -OCF3 | OCF3 |
| -CF2O- | Q |
| -F | F |
| -CH2=CH2- | V |
For example：It is expressed as 3CCV1,
Be expressed as 3BB (3F) B (3F, 5F) QB (3F,
5F)F。
Comparative example
Embodiment 1
Embodiment 2
Embodiment 3
Embodiment 4
Be can be seen that by above reference examples and embodiment 1, embodiment 2, embodiment 3, embodiment 4：Liquid crystal group of the invention
Compound significantly improves the transmitance of liquid crystal, while having clearing point higher, relatively low rotary viscosity γ1, suitable optics
Anisotropic and suitable dielectric anisotropic.It is particularly suitable for quick response, TN, FFS, IPS pattern of high transmittance
Use liquid crystal material.
Claims (5)
1. positive dielectric anisotropy liquid crystal composition, it is characterised in that：The liquid-crystal composition includes one or more institute of formula I
Show compound group into the first component, comprising compound group shown in one or more formula II into the second component, comprising one kind
Or compound group shown in various general formula IIIs into the 3rd component, the weight/mass percentage composition of the first component is 5~10%, the second component
Weight/mass percentage composition be 30~50%, the weight/mass percentage composition of the 3rd component is 5~15%, and the liquid-crystal composition is also included
Compound group shown in general formulae IV into the 4th component, in the liquid-crystal composition weight/mass percentage composition of the 4th component be 5~
15%, the liquid-crystal composition also comprising compound group shown in formula V into the 5th component, the 5th in the liquid-crystal composition
The weight/mass percentage composition of component be 5~10%, the liquid-crystal composition also comprising compound group shown in formula VI into the 6th group
Part, the weight/mass percentage composition of the 6th component is 20~40% in the liquid-crystal composition,
Wherein,
R1、R11、R2It is respectively selected from the one of which of the straight chained alkyl that carbon number is 1~5, the discontinuous-CH of any of which2- can
By-O- substitutions,
R3、R4The one of which of the straight-chain alkenyl that carbon number is 2~6 is respectively selected from,
R5Selected from the straight chained alkyl that carbon number is 1~5, the one of which of the straight-chain alkenyl that carbon number is 2~5,
R6Selected from the one of which of the straight chained alkyl that carbon number is 1~5,
R7Selected from the straight chained alkyl that carbon number is 1~5, the one of which of the straight-chain alkenyl that carbon number is 2~5,
R8Selected from the one of which of the straight chained alkyl that carbon number is 1~5,
R9Selected from cyclopenta；
Represent independently of one another：
One of which；
A represents 1,2,
L1、L2H or F is respectively selected from, and wherein at least one represents F.
2. positive dielectric anisotropy liquid crystal composition according to claim 1, it is characterised in that：Shownization of the formula I
Compound is specially the compound shown in formula I 1~I 5,
Compound shown in the formula II is specially the compound shown in formula II 1~II 2,
Compound shown in the general formula III is specially the compound shown in formula III 1~III 2,
Wherein,
R11Selected from the one of which of the straight chained alkyl that carbon number is 1~5, the discontinuous-CH of any of which2- can be taken by-O-
Generation,
R2Selected from the one of which of the straight chained alkyl that carbon number is 1~5, the discontinuous-CH of any of which2- can be replaced by-O-,
R4Selected from the one of which of the straight-chain alkenyl that carbon number is 2~6.
3. positive dielectric anisotropy liquid crystal composition according to claim 1, it is characterised in that：General formulae IV shownization
Compound is specially the compound shown in formula IV 1~IV 8,
Wherein,
R51Selected from the one of which of the straight chained alkyl that carbon number is 1~5,
One of which of the R6 selected from the straight chained alkyl that carbon number is 1~5.
4. positive dielectric anisotropy liquid crystal composition according to claim 1, it is characterised in that：Shown in the formula V
Compound is specially the compound shown in formula V 1~V 5,
Wherein,
R71Selected from the one of which of the straight chained alkyl that carbon number is 1~5,
R8Selected from the one of which of the straight chained alkyl that carbon number is 1~5.
5. liquid crystal display cells comprising the positive dielectric anisotropy liquid crystal composition any one of Claims 1 to 4 or
Liquid crystal display, it is characterised in that：The liquid crystal display cells or liquid crystal display be active matrix display element or display,
Passive matrix display element or display.
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| CN110577834B (en) * | 2018-06-08 | 2022-10-14 | 石家庄诚志永华显示材料有限公司 | Liquid crystal composition, liquid crystal display element and liquid crystal display |
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| DE69705625T2 (en) * | 1996-08-26 | 2002-05-29 | Chisso Corp | FLUOROVINYL DERIVATIVE COMPOUND, LIQUID CRYSTAL COMPOSITION AND LIQUID CRYSTAL DISPLAY DEVICE |
| JP4091987B2 (en) * | 1996-11-28 | 2008-05-28 | チッソ株式会社 | Chlorobenzene derivative, liquid crystal composition, and liquid crystal display device |
| JP4161663B2 (en) * | 2002-09-27 | 2008-10-08 | チッソ株式会社 | Liquid crystalline compounds, liquid crystal compositions and liquid crystal display devices having difluoromethyl and trifluoromethyl groups on the benzene ring |
| GB201301786D0 (en) * | 2012-02-15 | 2013-03-20 | Merck Patent Gmbh | Liquid-crystalline medium |
| CN102898272B (en) * | 2012-10-13 | 2015-10-07 | 江苏和成显示科技股份有限公司 | Containing six hydrogen indenes class novel liquid crystals and composition thereof and application in a liquid crystal display |
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