CN108239539A - The liquid-crystal composition and its display device of negative dielectric anisotropic - Google Patents
The liquid-crystal composition and its display device of negative dielectric anisotropic Download PDFInfo
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- CN108239539A CN108239539A CN201611203692.5A CN201611203692A CN108239539A CN 108239539 A CN108239539 A CN 108239539A CN 201611203692 A CN201611203692 A CN 201611203692A CN 108239539 A CN108239539 A CN 108239539A
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- 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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- C09K19/06—Non-steroidal liquid crystal compounds
- C09K19/08—Non-steroidal liquid crystal compounds containing at least two non-condensed rings
- C09K19/10—Non-steroidal liquid crystal compounds containing at least two non-condensed rings containing at least two benzene rings
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- C09K19/08—Non-steroidal liquid crystal compounds containing at least two non-condensed rings
- C09K19/30—Non-steroidal liquid crystal compounds containing at least two non-condensed rings containing saturated or unsaturated non-aromatic rings, e.g. cyclohexane rings
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- C09K19/30—Non-steroidal liquid crystal compounds containing at least two non-condensed rings containing saturated or unsaturated non-aromatic rings, e.g. cyclohexane rings
- C09K19/3001—Cyclohexane rings
- C09K19/3066—Cyclohexane rings in which the rings are linked by a chain containing carbon and oxygen atoms, e.g. esters or ethers
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- 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
- G02F1/137—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 characterised by the electro-optical or magneto-optical effect, e.g. field-induced phase transition, orientation effect, guest-host interaction or dynamic scattering
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- C09K19/06—Non-steroidal liquid crystal compounds
- C09K19/08—Non-steroidal liquid crystal compounds containing at least two non-condensed rings
- C09K19/10—Non-steroidal liquid crystal compounds containing at least two non-condensed rings containing at least two benzene rings
- C09K19/12—Non-steroidal liquid crystal compounds containing at least two non-condensed rings containing at least two benzene rings at least two benzene rings directly linked, e.g. biphenyls
- C09K2019/121—Compounds containing phenylene-1,4-diyl (-Ph-)
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- C09K19/06—Non-steroidal liquid crystal compounds
- C09K19/08—Non-steroidal liquid crystal compounds containing at least two non-condensed rings
- C09K19/30—Non-steroidal liquid crystal compounds containing at least two non-condensed rings containing saturated or unsaturated non-aromatic rings, e.g. cyclohexane rings
- C09K19/3001—Cyclohexane rings
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- C09K19/06—Non-steroidal liquid crystal compounds
- C09K19/08—Non-steroidal liquid crystal compounds containing at least two non-condensed rings
- C09K19/30—Non-steroidal liquid crystal compounds containing at least two non-condensed rings containing saturated or unsaturated non-aromatic rings, e.g. cyclohexane rings
- C09K19/3001—Cyclohexane rings
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- C09K2019/301—Cy-Cy-Ph
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- C09K19/08—Non-steroidal liquid crystal compounds containing at least two non-condensed rings
- C09K19/30—Non-steroidal liquid crystal compounds containing at least two non-condensed rings containing saturated or unsaturated non-aromatic rings, e.g. cyclohexane rings
- C09K19/3001—Cyclohexane rings
- C09K19/3003—Compounds containing at least two rings in which the different rings are directly linked (covalent bond)
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- C09K19/08—Non-steroidal liquid crystal compounds containing at least two non-condensed rings
- C09K19/30—Non-steroidal liquid crystal compounds containing at least two non-condensed rings containing saturated or unsaturated non-aromatic rings, e.g. cyclohexane rings
- C09K19/3001—Cyclohexane rings
- C09K19/3003—Compounds containing at least two rings in which the different rings are directly linked (covalent bond)
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- 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
- G02F1/137—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 characterised by the electro-optical or magneto-optical effect, e.g. field-induced phase transition, orientation effect, guest-host interaction or dynamic scattering
- G02F1/13712—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 characterised by the electro-optical or magneto-optical effect, e.g. field-induced phase transition, orientation effect, guest-host interaction or dynamic scattering the liquid crystal having negative dielectric anisotropy
Abstract
The invention discloses a kind of liquid-crystal composition of good, fast response time the negative dielectric anisotropic of low-temperature stability, the liquid-crystal composition includes：Account for the negative liquid crystal composition total weight 25 60% one or more of general formulas I 1 and or I 2 compound；Account for the compound of one or more of formulas II of the negative liquid crystal composition total weight 8 20%；Account for the compound of one or more of formulas III of the negative liquid crystal composition total weight 0 25%；Account for the compound of one or more of formulas IV of the negative liquid crystal composition total weight 10 60%；Account for the compound of one or more of formulas V of the negative liquid crystal composition total weight 20 50%.The invention also discloses the liquid crystal display devices of the liquid-crystal composition including the present invention.
Description
Technical field
The present invention relates to a kind of liquid-crystal composition, more particularly to a kind of liquid-crystal composition with negative dielectric anisotropic,
The negative liquid crystal composition has the big dielectric anisotropy of absolute value, wider nematic temperature range, good low temperature
The liquid-crystal composition of characteristics such as stability and higher clearing point, higher optical anisotropy and including the liquid crystal
The liquid crystal display device of composition.
Background technology
Liquid crystal display element is developed to and is set for home-use various electrical equipments, measure since clock, calculator
Standby, automobile panel, word processor, electronic notebook, printer, computer, television set etc..As representative liquid crystal display side
Formula, can enumerate TN (twisted-nematic) type, STN types (super twisted nematic) type, DS (dynamic light scattering) type, GH (host and guest) type,
IPS (plane conversion) type, OCB (optical compensation birefringence) type, ECB (voltage control birefringence) type, VA (vertical orientated) type,
CSH (colored super vertical) type or FLC (Ferroelectric liquid Crystals) type etc..In addition, the type of drive as liquid crystal display device, also may be used
To enumerate static drive, multiplexing driving, in a manner of simple matrix, by TFT (thin film transistor (TFT)), TFD (thin film diode) etc. come
Active matrix (AM) mode of driving.
In these display modes, IPS types, ECB types, VA types or CSH types etc. have to be showed using dielectric anisotropy Δ ε
Feature as the liquid-crystal composition of negative value.In these display modes, especially by the VA type display mode quilts of AM drivings
For requiring the display element of high-speed response and wide viewing angle (such as television set etc.) purposes.
Liquid crystal material is needed with appropriate high dielectric anisotropy, optical anisotropy and good low temperature intersolubility
And thermal stability.In addition, liquid crystal material should also have low viscosity and short response time, low threshold voltage and high contrast.Root
The each to performance indicator of composition is further illustrated according to commercially available liquid crystal display element.Nematic temperature range and element
Operating temperature range is associated.Nematic ceiling temperature is preferably more than or equal to 70 DEG C, and nematic lower limit temperature
Preferably less than it is equal to -10 DEG C.The viscosity of composition is associated with the response time of element.It is dynamic in order to show in the component
It draws, the response time of preferably element is short.Therefore, the viscosity of preferably composition is small, and group when preferably temperature is low
The viscosity for closing object is small.
The optical anisotropy of composition is associated with the contrast of element.In order to make the contrast of liquid crystal display element ratio
It maximizes, it can be by optical anisotropy (product value (Δ n*d) setting of Δ n) and the thickness (d) of liquid crystal layer of liquid-crystal composition
Mode for fixed value is designed.Appropriate product value depends on the type of operating mode.Such as the appropriate value of the element of TN patterns
About 0.45 μm.During the situation, for the smaller element of thickness of liquid crystal layer, the preferably big combination of optical anisotropy
Object.
The liquid crystal display element of the big liquid-crystal composition of absolute value containing dielectric anisotropy can reduce basic voltage
Value reduces driving voltage, and can further reduce consumption of electric power.
The liquid crystal display element of liquid-crystal composition containing lower threshold voltage can effectively reduce the power consumption of display, special
It is not in consumables, the similar portable electronic products such as mobile phone, tablet computer have longer cruise duration.
The small liquid-crystal composition of viscosity, can improve liquid crystal display element response speed.When the response speed of liquid crystal display element
When spending fast, it is applicable to animation and shows.In addition, when injecting liquid-crystal composition into the liquid crystal cell of liquid crystal display element, can shorten
Injection length can improve workability.
Prior art discloses with low-power consumption, the liquid-crystal composition of fast-response, such as patent document CN102858918A, but
Environmental issue (use of such as chlorine-containing compound), service life short (such as UV or thermal stability are poor), comparison exists in the prior art
It spends low (showing that screen whitens under such as daylight) and can not take into account each in the appropriate optics of the requirements such as LCD TV, tablet computer
Anisotropy, appropriate dielectric anisotropic, high voltage holding ratio, anti-UV be stable and the balancing performance problem of high-temperature stable, it is impossible to
Meet various aspects index simultaneously.
From the preparation angle of liquid crystal material, the properties of liquid crystal material check and balance influence, a certain performance
The promotion of index may make other performances change.Therefore, preparing all suitable liquid crystal material of various aspects of performance often needs
Want creative work.
Liquid crystal material is the important component of liquid crystal display, and global liquid crystal display has very big market at present
Demand is chiefly used in electric equipment products, but its life cycle is shorter.Shorter life cycle naturally occurring waste pollution etc. is asked
Topic, in the case where nowadays environmentally protective problem is increasingly subject to the attention of various circles of society, if can be controlled from source, i.e., in liquid crystal
The material of environment-friendly and green is selected in the modulated process of material, just can greatly reduce the ring paid during processing waste liquid crystal display
Border cost.Therefore, it is all suitable to prepare various aspects of performance, and economic, environmentally protective liquid crystal material is often with greater need for creative labor
It is dynamic.
Invention content
The goal of the invention of the present invention is to provide a kind of liquid-crystal composition with negative dielectric anisotropic, the negative liquid crystal
Composition have the big dielectric anisotropy of absolute value, wider nematic temperature range, good low-temperature stability and compared with
The characteristics such as high clearing point, higher optical anisotropy, even if particularly negative liquid crystal composition of the present invention is low
Still there is faster response speed, therefore, the display device comprising liquid-crystal composition of the present invention is especially suitable for low under temperature
In warm working environment.
Another goal of the invention of the present invention is to provide a kind of the aobvious of liquid-crystal composition comprising the negative dielectric anisotropic
Show device.
In order to complete foregoing invention purpose, the present invention provides a kind of liquid-crystal composition, the liquid-crystal composition has negative
Dielectric anisotropy, it includes：
Account for the negative liquid crystal composition total weight 25-60% one or more of general formulas I -1 and or I -2 chemical combination
Object
Account for the compound of one or more of general formulas II of the negative liquid crystal composition total weight 8-20%
Account for the compound of one or more of general formula IIIs of the negative liquid crystal composition total weight 0-25%
Account for the compound of one or more of general formulae IVs of the negative liquid crystal composition total weight 10-60%
Account for the compound of one or more of general formulas V of the negative liquid crystal composition total weight 20-50%
Wherein,
R1、R2、R3、R4、R5、R6、R7、R8、R9And R10Identical or different, it is 1 to 12 to each independently represent carbon atom number
The alkyl or alkoxy of halogenated or not halogenated linear chain or branch chain, the halogenated or not halogenated alkenyl that carbon atom number is 2 to 12 or
Alkenyloxy group；
It is identical or different, it each independently represents It is describedOne or more of H atom can be replaced by F atom；
X expressions-CH2O-、-CH2CH2,-COO- ,-≡-or singly-bound；
N represents 0 or 1；
A represents 0,1 or 2, wherein, when a is 0, ringAsynchronously represent
When a is 2,2 ringsIt can be identical or different.
In some embodiments of the present invention, preferably described R1、R2、R3、R4、R5、R6、R7、R8、R9And R10It is identical or not
Together, the alkyl for the linear chain or branch chain that carbon atom number is 1-5 or alkoxy or alkene that carbon atom number is 2 to 5 are each independently represented
Base；The further preferred R1、R2、R3、R4、R5、R6、R7、R8、R9And R10It is identical or different, each independently represent carbon atom number
The alkyl or alkoxy or carbon atom number of linear chain or branch chain for 1-5 are 2 to 5 alkenyl；The R4Independently represent carbon atom
Alkyl of the number for the linear chain or branch chain of 1-5.
In some embodiments of the present invention, it is preferably describedPhase
It is same or different, it each independently representsIt is describedOne or more of H it is former
Son can be replaced by F atom, wherein, it is describedMiddle one or more H atom can be replaced it to replace position not phase by F atom
It is adjacent.
In some embodiments of the present invention, preferred formula I -1 and or I -2 compound account for the negative liquid crystal group
Close object total weight 25-45%；The compound of general formula II accounts for the negative liquid crystal composition total weight 8-15%；The chemical combination of general formula III
Object accounts for the negative liquid crystal composition total weight 0-20%；The compound of general formulae IV accounts for the negative liquid crystal composition total weight
10-50%；And the compound of general formula V accounts for the negative liquid crystal composition total weight 20-45%.
In some embodiments of the present invention, preferred formula I -1 and or I -2 compound account for the negative liquid crystal group
Close object total weight 25-45%；The compound of general formula II accounts for the negative liquid crystal composition total weight 8-15%；The chemical combination of general formula III
Object accounts for the negative liquid crystal composition total weight 0-15%；The compound of general formulae IV accounts for the negative liquid crystal composition total weight
10-45%；And the compound of general formula V accounts for the negative liquid crystal composition total weight 20-40%.
In some embodiments of the present invention, preferred formula I -1 and or I -2 compound account for the negative liquid crystal group
Close object total weight 29-45%；The compound of general formula II accounts for the negative liquid crystal composition total weight 8-15%；The chemical combination of general formula III
Object accounts for the negative liquid crystal composition total weight 1-15%；The compound of general formulae IV accounts for the negative liquid crystal composition total weight
14-45%；And the compound of general formula V accounts for the negative liquid crystal composition total weight 20-40%.
In some embodiments of the present invention, the compound of preferably described general formula I -1 is selected from following compound composition
Group：
In some embodiments of the present invention, particularly preferably the compound of the general formula I -1 is selected from following compound group
Into group：
In some embodiments of the present invention, the compound of preferred formula I -1 accounts for the negative liquid crystal composition gross weight
Measure 0-30%, further preferably 10-30%；Further preferably 12-30%；Further preferably 15-30%；It is further excellent
It is selected as 15-30%.
In some embodiments of the present invention, the compound of preferably described general formula I -2 is selected from following compound composition
Group：
In some embodiments of the present invention, particularly preferably the compound of the general formula I -2 is selected from following compound group
Into group：
In some embodiments of the present invention, the compound of preferred formula I -2 accounts for the negative liquid crystal composition gross weight
Measure 0-30%；Further preferably 10-30%, further preferably 15-30%, further preferably 15-28%, it is further excellent
It is selected as 15-25%.
In some embodiments of the present invention, the compound of preferably described general formula III is selected from following compound composition
Group：
In some embodiments of the present invention, the compound of preferably described general formulae IV is selected from following compound composition
Group：
Wherein,
R7And R8It is identical or different, each independently represent the alkyl or alcoxyl of the linear chain or branch chain that carbon atom number is 1 to 12
Base, the alkenyl that carbon atom number is 2 to 12 or alkenyloxy group.
In some embodiments of the present invention, the compound of preferably described general formulae IV -1 is selected from following compound composition
Group：
In some embodiments of the present invention, the compound of preferably described general formulae IV -2 is selected from following compound composition
Group：
In some embodiments of the present invention, the compound of preferably described general formulae IV -3 is selected from following compound composition
Group：
In some embodiments of the present invention, the compound of preferably described general formulae IV -4 is selected from following compound composition
Group：
In some embodiments of the present invention, the compound of preferably described general formulae IV -5 is selected from following compound composition
Group：
In certain embodiments of the present invention, it is preferable that the compound of the general formula V is selected from by following compounds group
Into group in one or more of compounds：
Wherein,
R9And R10It is identical or different, each independently represent the alkane that alkyl, carbon atom number that carbon atom number is 1-5 are 1-5
The alkenyloxy group that the alkenyl or carbon atom number that oxygroup, carbon atom number are 2-5 are 2-5.
In certain embodiments of the present invention, it is preferable that the compound of the general formula V -1 is selected from by following compounds
One or more of compounds in the group of composition：
In some embodiments of the present invention, the compound of preferred formula V -1 accounts for the negative liquid crystal composition gross weight
Measure 20-45%, further preferably 25-42%.
In certain embodiments of the present invention, it is preferable that the compound of the general formula V -2 is selected from by following compounds
One or more of compounds in the group of composition：
In certain embodiments of the present invention, it is preferable that the compound of the general formula V -3 is selected from by following compounds
One or more of compounds in the group of composition：
In certain embodiments of the present invention, it is preferable that the compound of the general formula V -4 is selected from by following compounds
One or more of compounds in the group of composition：
In certain embodiments of the present invention, it is preferable that the compound of the general formula V -5 is selected from by following compounds
One or more of compounds in the group of composition：
In certain embodiments of the present invention, it is preferable that the compound of the general formula V -6 is selected from by following compounds
One or more of compounds in the group of composition：
In certain embodiments of the present invention, it is preferable that the compound of the general formula V -7 is selected from by following compounds
One or more of compounds in the group of composition：
In certain embodiments of the present invention, it is preferable that the compound of the general formula V -8 is selected from by following compounds
One or more of compounds in the group of composition：
In certain embodiments of the present invention, it is preferable that the compound of the general formula V -9 is selected from by following compounds
One or more of compounds in the group of composition：
In certain embodiments of the present invention, it is preferable that the compound of the general formula V -10 is selected from by following compounds
One or more of compounds in the group of composition：
In certain embodiments of the present invention, it is preferable that the compound of the general formula V -11 is selected from by following compounds
One or more of compounds in the group of composition：
In certain embodiments of the present invention, it is preferable that the compound of the general formula V -12 is selected from by following compounds
One or more of compounds in the group of composition：
Another aspect of the present invention provides a kind of liquid-crystal composition with negative dielectric anisotropic, also comprising this field skill
The known one or more additives with described in document of art personnel.
Refer to the stabilizer that can be for example added in mixture according to the present invention as follows.
Preferably, the stabilizer is selected from stabilizer as follows.
In embodiments of the invention, preferably described stabilizer accounts for the 0-5% of the liquid-crystal composition total weight；It is more excellent
Ground, the stabilizer account for the 0-1% of the liquid-crystal composition total weight；As particularly preferred scheme, the stabilizer accounts for described
The 0.01-0.1% of liquid-crystal composition total weight.
Another aspect of the invention, also provides a kind of liquid crystal display, and the liquid crystal display includes provided by the present invention
Liquid-crystal composition.
By using above-mentioned technical proposal, compared with prior art, the technique effect acquired by the present invention has：
Negative liquid crystal composition provided by the present invention has the big dielectric anisotropy of absolute value, wider nematic phase temperature
Spend range, the characteristics such as good low-temperature stability and higher clearing point, higher optical anisotropy, particularly this hair
Even if the bright negative liquid crystal composition still has faster response speed at low temperature, therefore, liquid crystal of the present invention is included
The display device of composition is especially suitable in low-temperature working environment.
The compound of Chinese style II of the present invention is combined with the compound of general formula I -1 and/or general formula I -2, can reach improvement packet
When compound and the low-temperature stability and low temperature of general formula I -1 and/or the compound liquid-crystal composition of general formula I -2 containing formula II respond
Between effect.
Unless otherwise specified, the ratio described in the present invention is weight ratio, and all temperature are degree celsius temperature.
Specific embodiment
Illustrate the present invention below with reference to specific embodiment.It should be noted that the following examples are the present invention
Example, be only used for illustrating the present invention, and be not limited to the present invention.In the case of without departing from present subject matter or range,
It can carry out other combinations and the various improvement in present inventive concept.
Liquid crystal display is that negative liquid crystal shows equipment, d=4 μm of box thickness, by inclined used by following embodiment
Shake device (polaroid), electrode base board etc. part form.The display equipment is normal white mode, i.e., no voltage difference is applied to row and column
When between electrode, observer observes the pixel color of white.Polarizer axes up and down on substrate are 90 degrees to each other angle.In two bases
Space between piece is full of optical liquid crystal material.
For ease of expressing, in following embodiment, the unit structure of liquid-crystal composition is represented with the code listed by table 1：
The group structure code of 1 liquid-crystal compounds of table
By taking the compound of following structural formula as an example：
The structural formula is represented such as the code listed by table 2, then can be expressed as：2PWP3,2 in code represent that left ends are-C2H5,
3 represent that right end is-C3H7；P in code represents 1,4- cyclohexylidenes；W represents bis- fluoro- 1,4- phenylenes of 2,3-.
In following embodiment test event to write a Chinese character in simplified form code name as follows：
Δn：Optical anisotropy (589nm, 25 DEG C)
Δε：Dielectric constant anisotropy (1KHz, 25 DEG C)
Cp clearing points (DEG C, nematic-isotropic phase transition temperature)
Wherein, optical anisotropy uses abbe's refractometer under sodium lamp (589nm) light source, 25 DEG C of tests obtain；It is situated between
Electrical testing box is VA6.0 types, and box is 6 μm thick.
Δ ε=ε ‖-ε ⊥, wherein, ε ‖ are the dielectric constant for being parallel to molecular axis, and ε ⊥ are normal for the dielectric perpendicular to molecular axis
Number, test condition：25 DEG C, 1KHz, testing cassete be VA6.0 types, box is 6 μm thick.
The test condition of low-temperature stability：7 μm of low temperature the storage box (cell) store -40 DEG C and -30 DEG C of low temperature, 5ml liquid crystal
Holding bottle (bottle) storage condition is -30 DEG C and -20 DEG C.
Response time is tested at 25 DEG C, 0 DEG C, -10 DEG C, -20 DEG C using DMS505 testers；Testing cassete is
VA4.0 testing cassetes, box are 4 μm, frequency 1000HZ, driving voltage V90 thick.
Used each ingredient below in an example can be synthesized or passed through by well known method
Commercial sources obtain.These synthetic technologys are conventional, and acquired each liquid-crystal compounds meets electrical type compound mark after tested
It is accurate.
According to the proportioning of liquid-crystal composition each as defined in following embodiment, liquid-crystal composition is prepared.The liquid-crystal composition
Preparation be to be carried out according to the conventional method of this field, such as take heating, ultrasonic wave, suspend mode mixed according to regulation ratio
It closes and is made.
Reference examples 1
The liquid-crystal composition of reference examples 1 is configured to by each compound and weight percent listed in table 2, is filled in liquid
It is tested for the property between crystal display two substrates, test data is as shown in the table：
2 liquid crystal combination composition formula of table and its test performance
Embodiment 1
The liquid-crystal composition of embodiment 1 is configured to by each compound and weight percent listed in table 3, is filled in liquid
It is tested for the property between crystal display two substrates, test data is as shown in the table：
3 liquid crystal combination composition formula of table and its test performance
Liquid-crystal composition described in comparative example 1 and embodiment 1 is poured into 4 μm of testing cassetes (cell) of test, observes comparative example 1
And partial crystallization situation of the liquid-crystal composition described in embodiment 1 in -40 DEG C and -20 DEG C, by liquid described in comparative example 1 and embodiment 1
Crystal composite is poured into storage bottle (bottle), observes liquid-crystal composition described in comparative example 1 and embodiment 1 at -30 DEG C and -20
DEG C when partial crystallization situation, test data is as shown in table 4：
Table 4
Liquid-crystal composition described in comparative example 1 and embodiment 1 is poured into 4 μm of testing cassetes of test, test comparison example 1 and implementation
Response time of the liquid-crystal composition described in example 1 at 25 DEG C, 0 DEG C, -10 DEG C and -20 DEG C, test data are as shown in table 5：
Table 5
Liquid-crystal composition described in embodiment 1 is can be seen that by each item data of comparative example 1 and comparative example 1 to have
The dielectric anisotropy that has absolute value big, higher clearing point, good low temperature storage performance and still have at low temperature compared with
Fast response speed.
Embodiment 2
The liquid-crystal composition of embodiment 2 is configured to by each compound and weight percent listed in table 6, is filled in liquid
It is tested for the property between crystal display two substrates, test data is as shown in the table：
6 liquid crystal combination composition formula of table and its test performance
Liquid-crystal composition described in comparative example 1 and embodiment 2 is poured into 4 μm of testing cassetes (cell) of test, observes comparative example 1
And partial crystallization situation of the liquid-crystal composition described in embodiment 2 in -40 DEG C and -20 DEG C, by liquid described in comparative example 1 and embodiment 2
Crystal composite is poured into storage bottle (bottle), observes liquid-crystal composition described in comparative example 1 and embodiment 2 at -30 DEG C and -20
DEG C when partial crystallization situation, test data is as shown in table 7：
Table 7
Liquid-crystal composition described in comparative example 1 and embodiment 2 is poured into 4 μm of testing cassetes of test, test comparison example 1 and implementation
Response time of the liquid-crystal composition described in example 2 at 25 DEG C, 0 DEG C, -10 DEG C and -20 DEG C, test data are as shown in table 8：
Table 8
The liquid-crystal composition described in embodiment 2 is can be seen that by each item data of comparative example 2 and comparative example 1 to have
The dielectric anisotropy that has absolute value big, higher clearing point, good low temperature storage performance and still have at low temperature compared with
Fast response speed.
Embodiment 3
The liquid-crystal composition of embodiment 3 is configured to by each compound and weight percent listed in table 9, is filled in liquid
It is tested for the property between crystal display two substrates, test data is as shown in the table：
9 liquid crystal combination composition formula of table and its test performance
Liquid-crystal composition described in comparative example 1 and embodiment 3 is poured into 4 μm of testing cassetes (cell) of test, observes comparative example 1
And partial crystallization situation of the liquid-crystal composition described in embodiment 3 in -40 DEG C and -20 DEG C, by liquid described in comparative example 1 and embodiment 3
Crystal composite is poured into storage bottle (bottle), observes liquid-crystal composition described in comparative example 1 and embodiment 3 at -30 DEG C and -20
DEG C when partial crystallization situation, test data is as shown in table 10：
Table 10
Liquid-crystal composition described in comparative example 1 and embodiment 3 is poured into 4 μm of testing cassetes of test, test comparison example 1 and implementation
Response time of the liquid-crystal composition described in example 3 at 25 DEG C, 0 DEG C, -10 DEG C and -20 DEG C, test data are as shown in table 11：
Table 11
Liquid-crystal composition described in embodiment 3 is can be seen that by each item data of comparative example 3 and comparative example 1 to have
The dielectric anisotropy that has absolute value big, higher clearing point, good low temperature storage performance and still have at low temperature compared with
Fast response speed.
Embodiment 4
Each compound and weight percent as listed by table 12 are configured to the liquid-crystal composition of embodiment 4, are filled in liquid
It is tested for the property between crystal display two substrates, test data is as shown in the table：
12 liquid crystal combination composition formula of table and its test performance
Liquid-crystal composition described in comparative example 1 and embodiment 4 is poured into 4 μm of testing cassetes (cell) of test, observes comparative example 1
And partial crystallization situation of the liquid-crystal composition described in embodiment 4 in -40 DEG C and -20 DEG C, by liquid described in comparative example 1 and embodiment 4
Crystal composite is poured into storage bottle (bottle), observes liquid-crystal composition described in comparative example 1 and embodiment 4 at -30 DEG C and -20
DEG C when partial crystallization situation, test data is as shown in table 13：
Table 13
Liquid-crystal composition described in comparative example 1 and embodiment 4 is poured into 4 μm of testing cassetes of test, test comparison example 1 and implementation
Response time of the liquid-crystal composition described in example 4 at 25 DEG C, 0 DEG C, -10 DEG C and -20 DEG C, test data are as shown in table 14：
Table 14
The liquid-crystal composition described in embodiment 4 is can be seen that by each item data of comparative example 4 and comparative example 1 to have
The dielectric anisotropy that has absolute value big, higher clearing point, good low temperature storage performance and still have at low temperature compared with
Fast response speed.
Embodiment 5
The liquid-crystal composition of embodiment 5 is configured to by each compound and weight percent of table 15, is filled in liquid crystal
Show and be tested for the property between device two substrates, test data is as shown in the table：
15 liquid crystal combination composition formula of table and its test performance
Liquid-crystal composition described in comparative example 1 and embodiment 5 is poured into 4 μm of testing cassetes (cell) of test, observes comparative example 1
And partial crystallization situation of the liquid-crystal composition described in embodiment 5 in -40 DEG C and -20 DEG C, by liquid described in comparative example 1 and embodiment 5
Crystal composite is poured into storage bottle (bottle), observes liquid-crystal composition described in comparative example 1 and embodiment 5 at -30 DEG C and -20
DEG C when partial crystallization situation, test data is as shown in table 16：
Table 16
Liquid-crystal composition described in comparative example 1 and embodiment 5 is poured into 4 μm of testing cassetes of test, test comparison example 1 and implementation
Response time of the liquid-crystal composition described in example 4 at 25 DEG C, 0 DEG C, -10 DEG C and -20 DEG C, test data are as shown in table 17：
Table 17
The liquid-crystal composition described in embodiment 5 is can be seen that by each item data of comparative example 5 and comparative example 1 to have
The dielectric anisotropy that has absolute value big, higher clearing point, good low temperature storage performance and still have at low temperature compared with
Fast response speed.
Embodiment 6
The liquid-crystal composition of embodiment 6 is configured to by each compound and weight percent of table 18, is filled in liquid crystal
Show and be tested for the property between device two substrates, test data is as shown in the table：
18 liquid crystal combination composition formula of table and its test performance
Liquid-crystal composition described in comparative example 1 and embodiment 6 is poured into 4 μm of testing cassetes (cell) of test, observes comparative example 1
And partial crystallization situation of the liquid-crystal composition described in embodiment 6 in -40 DEG C and -20 DEG C, by liquid described in comparative example 1 and embodiment 6
Crystal composite is poured into storage bottle (bottle), observes liquid-crystal composition described in comparative example 1 and embodiment 6 at -30 DEG C and -20
DEG C when partial crystallization situation, test data is as shown in table 19：
Table 19
Liquid-crystal composition described in comparative example 1 and embodiment 6 is poured into 4 μm of testing cassetes of test, test comparison example 1 and implementation
Response time of the liquid-crystal composition described in example 6 at 25 DEG C, 0 DEG C, -10 DEG C and -20 DEG C, test data are as shown in table 20：
Table 20
Liquid-crystal composition described in embodiment 1 is can be seen that by each item data of comparative example 6 and comparative example 1 to have
The dielectric anisotropy that has absolute value big, higher clearing point, good low temperature storage performance and still have at low temperature compared with
Fast response speed.
Embodiment 7
The liquid-crystal composition of embodiment 7 is configured to by each compound and weight percent of table 21, is filled in liquid crystal
Show and be tested for the property between device two substrates, test data is as shown in the table：
21 liquid crystal combination composition formula of table and its test performance
Liquid-crystal composition described in comparative example 1 and embodiment 7 is poured into 4 μm of testing cassetes (cell) of test, observes comparative example 1
And partial crystallization situation of the liquid-crystal composition described in embodiment 7 in -40 DEG C and -20 DEG C, by liquid described in comparative example 1 and embodiment 7
Crystal composite is poured into storage bottle (bottle), observes liquid-crystal composition described in comparative example 1 and embodiment 7 at -30 DEG C and -20
DEG C when partial crystallization situation, test data is as shown in table 22：
Table 22
Liquid-crystal composition described in comparative example 1 and embodiment 7 is poured into 4 μm of testing cassetes of test, test comparison example 1 and implementation
Response time of the liquid-crystal composition described in example 7 at 25 DEG C, 0 DEG C, -10 DEG C and -20 DEG C, test data are as shown in table 23：
Table 23
Liquid-crystal composition described in embodiment 1 is can be seen that by each item data of comparative example 7 and comparative example 1 to have
The dielectric anisotropy that has absolute value big, higher clearing point, good low temperature storage performance and still have at low temperature compared with
Fast response speed.
Embodiment 8
The liquid-crystal composition of embodiment 8 is configured to by each compound and weight percent of table 24, is filled in liquid crystal
Show and be tested for the property between device two substrates, test data is as shown in the table：
24 liquid crystal combination composition formula of table and its test performance
Liquid-crystal composition described in comparative example 1 and embodiment 8 is poured into 4 μm of testing cassetes (cell) of test, observes comparative example 1
And partial crystallization situation of the liquid-crystal composition described in embodiment 8 in -40 DEG C and -20 DEG C, by liquid described in comparative example 1 and embodiment 8
Crystal composite is poured into storage bottle (bottle), observes liquid-crystal composition described in comparative example 1 and embodiment 8 at -30 DEG C and -20
DEG C when partial crystallization situation, test data is as shown in Table 25：
Table 25
Liquid-crystal composition described in comparative example 1 and embodiment 8 is poured into 4 μm of testing cassetes of test, test comparison example 1 and implementation
Response time of the liquid-crystal composition described in example 8 at 25 DEG C, 0 DEG C, -10 DEG C and -20 DEG C, test data are as shown in table 26：
Table 26
Liquid-crystal composition tool described in embodiment 1 is can be seen that by comparing each item data of embodiment 8 and comparative example 1
The dielectric anisotropy that has absolute value big, higher clearing point, good low temperature storage performance and still have at low temperature compared with
Fast response speed.
From more than comparative example and embodiment can be seen that the present invention negative liquid crystal composition have with absolute value greatly
Dielectric anisotropy, wider nematic temperature range, good low-temperature stability and higher clearing point, higher light
The characteristics such as anisotropy are learned, even if particularly negative liquid crystal composition of the present invention still has faster response speed at low temperature
Degree, therefore, the display device comprising liquid-crystal composition of the present invention is especially suitable in low-temperature working environment.
The technical concepts and features of embodiment of above only to illustrate the invention, its object is to allow be familiar with technique
People understands the content of present invention and is implemented, and it is not intended to limit the scope of the present invention, all real according to spirit of the invention
The equivalent change or modification that matter is done should all cover within the scope of the present invention.
Claims (9)
1. a kind of liquid-crystal composition with negative dielectric anisotropic, which is characterized in that the liquid-crystal composition includes：
Account for the negative liquid crystal composition total weight 25-60% one or more of general formulas I -1 and or I -2 compound
Account for the compound of the formula II of the negative liquid crystal composition total weight 8-20%
Account for the compound of one or more of general formula IIIs of the negative liquid crystal composition total weight 0-25%
Account for the compound of one or more of general formulae IVs of the negative liquid crystal composition total weight 10-60%
And
Account for the compound of one or more of general formulas V of the negative liquid crystal composition total weight 20-50%
Wherein,
R1、R2、R3、R4、R5、R6、R7、R8、R9And R10It is identical or different, each independently represent carbon atom number be 1 to 12 it is halogenated
Or halogenated or not halogenated alkenyl or alkene oxygen of the alkyl or alkoxy, carbon atom number of not halogenated linear chain or branch chain for 2 to 12
Base；
X expressions-CH2O-、-CH2CH2,-COO- ,-≡-or singly-bound；
N represents 0 or 1；
It is identical or different, it each independently represents It is describedOne or more of H atom can be replaced by F atom；
A represents 0,1 or 2, wherein, when a is 0, ringAsynchronously representA is 2
When, 2 ringsIt can be identical or different.
2. the liquid-crystal composition of negative dielectric anisotropic according to claim 1, which is characterized in that the general formula I -1
Compound is selected from the group of following compound composition：
3. the liquid-crystal composition of negative dielectric anisotropic according to claim 1, which is characterized in that the general formula I -2
Compound is selected from the group of following compound composition：
4. the liquid-crystal composition of negative dielectric anisotropic according to claim 1, which is characterized in that the change of the general formula III
Close the group that object is selected from following compound composition：
5. the liquid-crystal composition of negative dielectric anisotropic according to claim 1, which is characterized in that the change of the general formulae IV
Close the group that object is selected from following compound composition：
Wherein,
R7And R8It is identical or different, each independently represent carbon atom number be 1 to 12 linear chain or branch chain alkyl or alkoxy,
Alkenyl or the alkenyloxy group that carbon atom number is 2 to 12.
6. the liquid-crystal composition of negative dielectric anisotropic according to claim 1, which is characterized in that the change of the general formula V
Close object one or more of compounds in the group being made of following compounds：
Wherein,
R9And R10It is identical or different, each independently represent alkoxy that alkyl, carbon atom number that carbon atom number is 1-5 are 1-5,
The alkenyloxy group that the alkenyl or carbon atom number that carbon atom number is 2-5 are 2-5.
7. a kind of liquid-crystal composition with negative dielectric anisotropic includes liquid crystal group according to any one of claims 1 to 6
Close object, which is characterized in that the liquid-crystal composition also includes one or more additives.
8. a kind of liquid crystal display, which is characterized in that including liquid-crystal composition according to any one of claims 1 to 6.
9. a kind of liquid crystal display, which is characterized in that including the liquid-crystal composition described in claim 7.
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| CN113621385A (en) * | 2021-08-10 | 2021-11-09 | 重庆汉朗精工科技有限公司 | Wide-temperature-range fast-response negative liquid crystal composition and application thereof |
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