Background technology
For liquid crystal display cells, PC (phase change, phase transformation), TN are divided into according to the display pattern of liquid crystal
(twist nematic, twisted-nematic), STN (super twisted nematic, super twisted nematic), ECB
(electrically controlled birefringence, electrically conerolled birefringence), OCB (optically compensated
It is bend, optical compensation curved), IPS (in-plane switching, coplanar transformation), VA (vertical alignment, hang down
Straight orientation) etc. type.PM (passive matrix, passive-matrix) types and AM (active are divided into according to the type of drive of element
Matrix, active-matrix) type.PM points are the static state type such as (static) and multichannel (multiplex).AM points are TFT (thin
Film transistor, thin film transistor (TFT)), the class such as MIM (metal insulator metal, metal-insulator-metal)
Type.TFT type has non-crystalline silicon (amorphous silicon) and polysilicon (polycrystal silicon).The latter according to
Manufacturing process is divided into high temperature modification and low form.Liquid crystal display cells according to the type of light source be divided into the reflection-type using natural light,
Infiltration type using backlight and the semi-transmission type using two kinds of light sources of natural light and backlight.
The general characteristic of the composition of table 1 and AM elements
NO. |
The general characteristic of composition |
The general characteristic of AM elements |
1 |
Nematic wide temperature range |
Workable wide temperature range |
2 |
Viscosity is small |
Response time is short |
3 |
Optical anisotropy is appropriate |
Contrast is big |
4 |
Positive or negative property dielectric constant anisotropy is big |
Critical voltage is low, and consumption electric power is small, and contrast is big |
5 |
Resistivity is big |
Voltage retention is big, and contrast is big |
6 |
To ultraviolet and thermostabilization |
Long lifespan |
Liquid crystal material is needed with appropriate high dielectric anisotropy, optical anisotropy and good low temperature intersolubility
And heat endurance.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 indications of composition is further illustrated according to commercially available liquid crystal display cells.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
Draw, 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 of compound is small.
The optical anisotropy of composition is associated with the contrast of element.In order that the contrast ratio of liquid crystal display cells
Maximize, can be by optical anisotropy (Δ n) and the thickness (d) of liquid crystal layer product value (Δ n*d) setting of liquid-crystal composition
It is designed for the mode of fixed value.Appropriate product value depends on the species of operating mode.Such as the appropriate value of the element of TN patterns
About 0.45 μm.During the situation, for the less element of thickness of liquid crystal layer, the preferably big combination of optical anisotropy
Thing.
Liquid crystal display cells containing the appropriate liquid-crystal composition of optical anisotropy can increase contrast.
The liquid crystal display cells of the big liquid-crystal composition of absolute value containing dielectric anisotropy can reduce basic voltage
Value, driving voltage is reduced, and can further reduce consumption of electric power.
Single liquid-crystal compounds is generally difficult to play its characteristic, and generally it is mixed with other plurality of liquid crystals compounds and is matched somebody with somebody
Composition is made.In available liquid crystal composition, preferably characteristic can be obtained, but the category combinations thing nematic phase temperature model
Enclose that not wide enough, clearing point is relatively low, viscosity is higher, optical anisotropy is not big enough, dielectric anisotropy is relatively low, ultraviolet and high temperature is steady
It is qualitative it is poor, voltage retention is low, to be mixed into have compared with large optical anisotropic, suitable dielectric anisotropy, better stability
And preferably the composition of contrast helps less, to directly result in the adverse consequences such as contrast is low, response speed is slow, such as
Liquid-crystal composition disclosed in CN101796162A, CN1475547A, in varying degrees with disadvantages mentioned above.
Therefore, it is necessary to which a kind of liquid-crystal composition, it has big optical anisotropy;High dielectric anisotropy;High
Clearing point;Low threshold voltage;It is higher at least one of the characteristic characteristic such as to display contrast.
The content of the invention
It is an object of the invention to provide it is a kind of with big dielectric anisotropy, it is high optical anisotropy, high limpid
The liquid-crystal composition of the characteristic such as point and low threshold voltage.
Other purposes of the present invention are to provide a kind of liquid crystal display cells, and it is included with big dielectric anisotropy, height
The characteristic such as optical anisotropy, high clearing point and low threshold voltage liquid-crystal composition so that liquid crystal display cells
With high-contrast and superior power saving performance.
In order to realize foregoing invention purpose, of the invention provides a kind of liquid-crystal composition, and the liquid-crystal composition includes:
The compound of one or more formulas I is as the first component
The compound of one or more formulas II is as the second component
The compound of one or more general formula IIIs is as third component
And
The compound of one or more general formulae IVs is as the 4th component
Wherein,
R1R3、R4And R5It is identical or different, represent carbon number for 1-7 fluoro or not by the alkane of fluoro independently of one another
Base, carbon number are for 1-7 fluoro or not by the alkoxy of fluoro, or carbon number for 2-7 fluoro or not by the alkene of fluoro
Base;
R2Fluoro that expression-H, carbon number are 1-7 or the fluoro or not for being not 1-7 by the alkyl of fluoro, carbon number
By the alkoxy of fluoro, or carbon number for 2-7 fluoro or not by the alkenyl of fluoro;
Represent
OrIt is describedUpper one or more H can be substituted by F;
RingRingRingRingAnd ringIt is identical
Or it is different, represent independently of one anotherOr
RingRingRingAnd ringIt is identical or different, each solely
On the spot representOr
L1And L2It is identical or different, expression-H or-F independently of one another;
Z1And Z2It is identical or different, singly-bound ,-COO- ,-CH are represented independently of one another2CH2- or-CH2O-;
Z3And Z4It is identical or different, singly-bound ,-COO- or-CH are represented independently of one another2O-;
A represents 0,1 or 2, and when a is 2, ringCan be with identical, can also be different;
B, d and e are identical or different, each independent expression 0 or 1;
Wherein, as d=e=0, d=1 and e=0 or d=0 and e=1, ringAnd ringNo
It is simultaneously
In certain embodiments of the present invention, the compound of preferably described formula I accounts for the liquid-crystal composition gross weight
1-30%;The compound of the formula II accounts for the 15-55% of the liquid-crystal composition gross weight;The compound of the general formula III
Account for the 1-40% of the liquid-crystal composition gross weight;And the compound of the general formulae IV accounts for the liquid-crystal composition gross weight
10-50%.
In certain embodiments of the present invention, the compound of preferably described formula I accounts for the liquid-crystal composition gross weight
5-25%;The compound of the formula II accounts for the 20-50% of the liquid-crystal composition gross weight;The compound of the general formula III
Account for the 5-40% of the liquid-crystal composition gross weight;And the compound of the general formulae IV accounts for the liquid-crystal composition gross weight
10-35%.
In some embodiments of the present invention, it is preferable that the compound of the formula I is selected from and is made up of following compounds
Group in one or more of compounds:
And
In some embodiments of the present invention, it is preferable that the compound of the formula II is selected from by following compounds group
Into group in one or more of compounds:
And
Wherein,
R2Represent the carbon number fluoro for being 1-7 or be not 1-7 by the alkyl of fluoro, carbon number fluoro or not by fluorine
The alkoxy in generation.
In certain embodiments of the present invention, it is preferable that formula II -1 accounts for the 0- of the liquid-crystal composition gross weight
35%, preferably, in certain embodiments of the present invention, the formula II -1 accounts for the liquid-crystal composition gross weight
0-30%.
In certain embodiments of the present invention, it is preferable that the formula II -4 accounts for the liquid-crystal composition gross weight
0-15%.
In certain embodiments of the present invention, it is preferable that the formula II -5 accounts for the liquid-crystal composition gross weight
1-25%, preferably, in certain embodiments of the present invention, the formula II -5 accounts for the liquid-crystal composition gross weight
The 5-20% of amount.
In certain embodiments of the present invention, it is preferable that the formula II -6 accounts for the liquid-crystal composition gross weight
0-15%.
In certain embodiments of the present invention, it is preferable that the formula II -9 accounts for the liquid-crystal composition gross weight
0-15%.
In certain embodiments of the present invention, it is preferable that the formula II -10 accounts for the liquid-crystal composition gross weight
0-15%.
In some embodiments of the present invention, it is preferable that the compound of the formula II -1 is selected from by following compounds
One or more compounds in the group of composition:
And
In some embodiments of the present invention, it is preferable that the compound of the formula II -2 is selected from by following compounds
One or more compounds in the group of composition:
And
In some embodiments of the present invention, it is preferable that the compound of the formula II -3 is selected from by following compounds
One or more compounds in the group of composition:
And
In some embodiments of the present invention, it is preferable that the compound of the formula II -4 is selected from by following compounds
One or more compounds in the group of composition:
And
In some embodiments of the present invention, it is preferable that the compound of the formula II -5 is selected from by following compounds
One or more compounds in the group of composition:
And
In some embodiments of the present invention, it is preferable that the compound of the formula II -6 is selected from by following compounds
One or more compounds in the group of composition:
And
In some embodiments of the present invention, it is preferable that the compound of the formula II -7 is selected from by following compounds
One or more compounds in the group of composition:
And
In some embodiments of the present invention, it is preferable that the compound of the formula II -8 is selected from by following compounds
One or more compounds in the group of composition:
And
In some embodiments of the present invention, it is preferable that the compound of the formula II -9 is selected from by following compounds
One or more compounds in the group of composition:
And
In some embodiments of the present invention, it is preferable that the compound of the formula II -10 is selected from by following compounds
One or more compounds in the group of composition:
And
In some embodiments of the present invention, it is preferable that the compound of the formula II -11 is selected from by following compounds
One or more compounds in the group of composition:
And
In some embodiments of the present invention, it is preferable that the compound of the general formula III is selected from by following compounds group
Into group in one or more of compounds:
And
Wherein,
R3Represent the carbon number fluoro for being 1-5 or be not 1-5 by the alkyl of fluoro, carbon number fluoro or not by fluorine
The alkoxy in generation, or carbon number is for 2-5 fluoro or not by the alkenyl of fluoro.
In some embodiments of the present invention, it is preferable that the compound of the general formula III -1 is selected from by following compounds
One or more of compounds in the group of composition:
And
In some embodiments of the present invention, it is preferable that the compound of the general formula III -2 is selected from by following compounds
One or more of compounds in the group of composition:
And
In some embodiments of the present invention, it is preferable that the compound of the general formula III -3 is selected from by following compounds
One or more of compounds in the group of composition:
And
In some embodiments of the present invention, it is preferable that the compound of the general formula III -4 is selected from by following compounds
One or more of compounds in the group of composition:
And
In some embodiments of the present invention, it is preferable that the compound of the general formula III -5 is selected from by following compounds
One or more of compounds in the group of composition:
And
In some embodiments of the present invention, it is preferable that the compound of the general formula III -6 is selected from by following compounds
One or more of compounds in the group of composition:
And
In some embodiments of the present invention, it is preferable that the compound of the general formula III -7 is selected from by following compounds
One or more of compounds in the group of composition:
And
In some embodiments of the present invention, it is preferable that the compound of the general formula III -8 is selected from by following compounds
One or more of compounds in the group of composition:
And
In some embodiments of the present invention, it is preferable that the compound of the general formula III -9 is selected from by following compounds
One or more of compounds in the group of composition:
And
In some embodiments of the present invention, it is preferable that the compound of the general formula III -10 is selected from by following compounds
One or more of compounds in the group of composition:
And
In some embodiments of the present invention, it is preferable that the compound of the general formula III -11 is selected from by following compounds
One or more of compounds in the group of composition:
And
In some embodiments of the present invention, it is preferable that the compound of the general formula III -12 is selected from by following compounds
One or more of compounds in the group of composition:
And
In some embodiments of the present invention, it is preferable that the compound of the general formula III -13 is selected from by following compounds
One or more of compounds in the group of composition:
And
In some embodiments of the present invention, it is preferable that the compound of the general formulae IV is selected from by following compounds group
Into group in one or more of compounds:
And
Wherein,
R4And R5It is identical or different, the alcoxyl that alkyl, carbon number that carbon number is 1-5 are 1-5 is represented independently of one another
The alkenyloxy group that the alkenyl or carbon number that base, carbon number are 2-5 are 2-5.
In certain embodiments of the present invention, it is preferable that the compound of the general formulae IV -1 accounts for the liquid-crystal composition
The 1-30% of gross weight;As optimal technical scheme, the compound of the general formulae IV -1 accounts for the liquid-crystal composition gross weight
1-20%.
In certain embodiments of the present invention, it is preferable that the compound of the general formulae IV -5 accounts for the liquid-crystal composition
The 1-20% of gross weight;As optimal technical scheme, the compound of the general formulae IV -5 accounts for the liquid-crystal composition gross weight
1-10%.
In certain embodiments of the present invention, it is preferable that the compound of the general formulae IV -7 accounts for the liquid-crystal composition
The 0-25% of gross weight;As optimal technical scheme, the compound of the general formulae IV -7 accounts for the liquid-crystal composition gross weight
0-20%.
In certain embodiments of the present invention, it is preferable that the compound of the general formulae IV -8 accounts for the liquid-crystal composition
The 0-20% of gross weight;As optimal technical scheme, the compound of the general formulae IV -8 accounts for the liquid-crystal composition gross weight
0-15%.
In certain embodiments of the present invention, it is preferable that the compound of the general formulae IV -10 accounts for the liquid-crystal composition
The 1-20% of gross weight;As optimal technical scheme, the compound of the general formulae IV -10 accounts for the liquid-crystal composition gross weight
5-15%.
In some embodiments of the present invention, it is preferable that the compound of the general formulae IV -1 is selected from by following compounds
One or more of compounds in the group of composition:
And
In some embodiments of the present invention, it is preferable that the compound of the general formulae IV -2 is selected from by following compounds
One or more of compounds in the group of composition:
And
In some embodiments of the present invention, it is preferable that the compound of the general formulae IV -3 is selected from by following compounds
One or more of compounds in the group of composition:
And
In some embodiments of the present invention, it is preferable that the compound of the general formulae IV -4 is selected from by following compounds
One or more of compounds in the group of composition:
And
In some embodiments of the present invention, it is preferable that the compound of the general formulae IV -5 is selected from by following compounds
One or more of compounds in the group of composition:
And
In some embodiments of the present invention, it is preferable that the compound of the general formulae IV -6 is selected from by following compounds
One or more of compounds in the group of composition:
And
In some embodiments of the present invention, it is preferable that the compound of the general formulae IV -7 is selected from by following compounds
One or more of compounds in the group of composition:
And
In some embodiments of the present invention, it is preferable that the compound of the general formulae IV -8 is selected from by following compounds
One or more of compounds in the group of composition:
And
In some embodiments of the present invention, it is preferable that the compound of the general formulae IV -9 is selected from by following compounds
One or more of compounds in the group of composition:
And
In some embodiments of the present invention, it is preferable that the compound of the general formulae IV -10 is selected from by following compounds
One or more of compounds in the group of composition:
And
Another aspect of the present invention provides a kind of liquid crystal display device, and the liquid crystal display device includes the liquid of the present invention
Crystal composite.
The present invention passes through the comparison with compareing, it is determined that including above-mentioned liquid by being combined experiment to above-claimed cpd
The liquid-crystal composition of crystallization compound, have larger dielectric anisotropy, larger optical anisotropy, suitable clearing point with
And the characteristic such as low threshold voltage, liquid-crystal composition of the present invention is suitable for liquid crystal display device so that liquid crystal display
Element has the characteristic such as superior power saving performance and high contrast.
In the present invention unless otherwise specified, described ratio is weight ratio, and all temperature are degree celsius temperature, institute
The box thickness that the test for the response time data stated is selected is 7 μm.