CN104371741A - Liquid crystal composition and application thereof - Google Patents
Liquid crystal composition and application thereof Download PDFInfo
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- CN104371741A CN104371741A CN201310358494.6A CN201310358494A CN104371741A CN 104371741 A CN104371741 A CN 104371741A CN 201310358494 A CN201310358494 A CN 201310358494A CN 104371741 A CN104371741 A CN 104371741A
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Abstract
The invention provides a liquid crystal composition, which contains at least a compound selected in a general formula I as a first component; at least a compound selected in a general formula II as a second component; at least a compound selected in a general formula III as a third component; at least a compound selected in a general formula IV as a fourth component; at least a compound selected in a general formula V as a fifth component; and at least a compound selected from formulas VI-1, VI-2 and/or VI-3 as a sixth component. The liquid crystal composition has the characteristics of low viscosity, good low-temperature storage performance, large optical anisotropy and large dielectric anisotropy. The invention also provides a liquid crystal display device containing the liquid crystal composition. The liquid crystal display device can be used for an IPS mode, a VA mode, a PS-VA mode, a PALC mode, a FFS mode or an ECB mode.
Description
Technical field
The present invention relates to a kind of liquid-crystal composition, particularly a kind of have suitable optical anisotropy and dielectric anisotropy, the liquid-crystal composition of less viscosity, faster response speed and good low temperature storage stability and application in a liquid crystal display thereof.
Background technology
For liquid crystal display device, PC(phase change is divided into according to the display format of liquid crystal, phase transformation), TN(twist nematic, twisted-nematic), STN (super twisted nematic, supertwist to row), ECB(electrically controlled birefringence, electrically conerolled birefringence), OCB(optically compensatedbend, optical compensation curved), IPS(in-plane switching, coplanar transformation), VA(vertical alignment, vertical orientation) etc. type.Liquid crystal display device is divided into according to the type of light source and utilizes the reflection-type of natural light, utilizes the infiltration type of backlight and utilize the semi-transmission type of natural light and backlight two kinds of light sources.
Known in above-mentioned operating mode, ecb mode, IPS pattern, VA mode equations utilize the operating mode of the vertical orientation of liquid crystal molecule, and especially IPS pattern and VA pattern can improve the narrow and small shortcoming in the display format visual angle such as TN pattern, STN pattern.
Liquid crystal material needs to have suitably high dielectric anisotropic, optics anisotropic and good low temperature intersolubility and thermostability.In addition, liquid crystal material also should have low viscosity and short response time, low threshold voltage and high-contrast.The each to performance index of composition is further illustrated according to commercially available liquid crystal display device.Nematic temperature range is associated with the operating temperature range of element.Nematic ceiling temperature is preferably and is more than or equal to 70 DEG C, and nematic lower limit temperature is preferably and is less than or equal to-10 DEG C.The viscosity of composition was associated with the time of response of element.In order to show animation in the component, the time of response being preferably element is short.Therefore, the viscosity being preferably composition is little, and be more preferably temperature low time composition viscosity little.
The optical anisotropy of composition is associated with the contrast gradient of element.In order to make the contrast gradient of liquid crystal display device than maximizing, the optical anisotropy of liquid-crystal composition (Δ n) and the product value (Δ n*d) of the thickness (d) of liquid crystal layer can be set as that the mode of fixed value designs.Suitable product value depends on the kind of operating mode.Appropriate value as the element of TN pattern is about 0.45 μm.During this situation, for the element that thickness of liquid crystal layer is less, be preferably the composition that optical anisotropy is large.
The large dielectric anisotropy of composition contributes to making element have low critical voltage, little consumed power and large contrast gradient.Therefore, large dielectric anisotropy is preferably.The resistivity of composition contributes to greatly making element have large voltage retention and large contrast gradient.Therefore, be preferably and be not only at room temperature in the starting stage and at high temperature also there is the composition of larger resistivity.After being preferably long-time use not only at room temperature but also at high temperature also there is the composition of larger resistivity.Composition to ultraviolet and the stability of heat relevant with the life-span of liquid crystal display device.During aforementioned stable height, the life-span of this element is long.This kind of characteristic is for liquid crystal projection apparatus, and the liquid crystal display device used in LCD TV etc. is good.
Single liquid crystalline cpd is difficult to play its characteristic usually, usually itself and other plurality of liquid crystals compound is mixed with composition.In available liquid crystal composition, preferably characteristic can be obtained, but this species compound optical anisotropy is large not, dielectric anisotropy is large not, help little to being mixed into the large composition of Δ n and Δ ε, thus be unfavorable for being used in the thick product of capsule, directly cause response speed fast not, liquid-crystal composition disclosed in CN101796162A, CN1475547A, has above-mentioned shortcoming in varying degrees.
Therefore, need a kind of liquid-crystal composition, it has high, the nematic lower limit temperature of nematic ceiling temperature low (namely transition temperature range is wide); Low viscosity; Large optical anisotropy; Large dielectric anisotropy; Good ultraviolet stability; At least one characteristic in the characteristics such as good low temperature storage stability.Other objects of the present invention are to provide a kind of liquid crystal display device, its be have that optical anisotropy is large, dielectric anisotropy is large, composition to characteristics such as ultraviolet stability are high, and makes liquid crystal display device time of response short, the characteristic such as irrigation crystal speed is fast, voltage retention is large, contrast gradient is large, the life-span is long.
Summary of the invention
The object of the present invention is to provide a kind of liquid-crystal composition, it possesses the characteristics such as wide nematic temperature range, low viscosity, large optical anisotropy, large dielectric anisotropy, good low temperature storage stability, the advantages such as the liquid crystal display device comprising this liquid-crystal composition has fast response time, clearing point is high, driving voltage is low, mutual solubility is good.
In order to complete foregoing invention object, the invention provides a kind of liquid-crystal composition, comprising:
At least one is selected from the compound shown in formula I as the first component
At least one is selected from the compound shown in general formula II as the second component
At least one is selected from the compound shown in general formula III as the 3rd component
At least one is selected from the compound shown in general formulae IV as the 4th component
At least one is selected from the compound shown in general formula V as the 5th component
At least one is selected from the compound of formula VI-1, VI-2 and/or VI-3 as the 6th component
Wherein,
R
1, R
2, R
3, R
4, R
5, R
6, R
7and R
8identical or different, represent the alkene oxygen base of the alkyl of 1-5 carbon atom, the alkoxyl group of a 1-5 carbon atom, the thiazolinyl of a 2-5 carbon atom or 2-5 carbon atom independently of one another;
R
9and R
10identical or different, represent the alkene oxygen base of the alkyl of 1-5 carbon atom, the thiazolinyl of a 2-5 carbon atom or 2-5 carbon atom independently of one another;
Ring
represent
or
M and n is identical or different, represents 0 or 1 independently of one another.
In some embodiments of the present invention, the compound of preferred described formula I accounts for the 1-30% of described liquid-crystal composition gross weight; The compound of described general formula II accounts for the 1-40% of described liquid-crystal composition gross weight; The compound of described general formula Ш accounts for the 1-30% of described liquid-crystal composition gross weight; The compound of described general formulae IV accounts for the 1-30% of described liquid-crystal composition gross weight; The compound of described general formula V accounts for-60% of described liquid-crystal composition gross weight; And the compound of described general formula VI-1, VI-2 and/or VI-3 accounts for-15% of described liquid-crystal composition gross weight.
In some embodiments of the present invention, particularly preferably the compound of described formula I accounts for the 5-20% of described liquid-crystal composition gross weight; The compound of described general formula II accounts for the 5-30% of described liquid-crystal composition gross weight; The compound of described general formula Ш accounts for the 5-25% of described liquid-crystal composition gross weight; The compound of described general formulae IV accounts for the 5-25% of described liquid-crystal composition gross weight; The compound of described general formula V accounts for the 15-50% of described liquid-crystal composition gross weight; And the compound of described general formula VI-1, VI-2 and/or VI-3 accounts for the 3-10% of described liquid-crystal composition gross weight.
In some embodiments of the present invention, the compound of described formula I to be selected from the group be made up of following compound one or more compound:
In some embodiments of the present invention, the compound of described general formula II to be selected from the group be made up of following compound one or more compound:
In some embodiments of the present invention, the compound of described general formula Ш to be selected from the group be made up of following compound one or more compound:
In some embodiments of the present invention, the compound of described general formulae IV to be selected from the group be made up of following compound one or more compound:
In some embodiments of the present invention, the compound of described general formula V to be selected from the group be made up of following compound one or more compound:
Another aspect of the present invention provides a kind of liquid crystal display device, and this liquid crystal display device comprises liquid-crystal composition of the present invention.
In some embodiments, described liquid crystal display device may be used for IPS pattern, VA pattern, PS-VA pattern, PALC pattern, FFS mode or ecb mode.
Liquid-crystal composition of the present invention, it possesses the characteristics such as low viscosity, good low temperature property retention energy, large optical anisotropy, large dielectric anisotropy, the advantages such as the liquid crystal display device comprising this liquid-crystal composition has fast response time, clearing point is high, driving voltage is low, mutual solubility is good.
In the present invention except specified otherwise, all temperature related to are centigradetemperature, and all per-cent counts by weight percentage.
Embodiment
Below with reference to specific embodiments, the present invention is described.It should be noted that, the following examples are example of the present invention, are only used for the present invention is described, and are not used for limiting the present invention.When not departing from purport of the present invention or scope, other combination and the various improvement in design of the present invention can be carried out.
The liquid-crystal display that following embodiment adopts is negative liquid crystal display equipment, the thick d=4 of box
μm, is made up of parts such as polarizer (polaroid), electrode base boards.This display equipment is normal white mode, and when namely not having voltage difference to put between row and column electrode, viewer observes the pixel color of white.Polarizer axes up and down on substrate is 90 degrees to each other angle.Space between two substrates is full of optical liquid crystal material.
For ease of expressing, in following embodiment, the coded representation of unit structure listed by table 1 of liquid crystalline cpd:
The unit structure code of table 1 liquid crystalline cpd
For following structure:
Coded representation in this structure table 1: then can be expressed as 3CC1OWO2, and for example:
Then can be expressed as nCPTPOm, the n in code represents the C atomicity of left end alkyl, and such as n is " 3 ", namely represents that this alkyl is-C
3h
7; C in code represents cyclohexyl; O represention oxygen atom in code; P in code represents phenylene; M in code represents the C atomicity of right-hand member alkyl, and such as m is " 1 ", namely represents that the alkyl of right-hand member is-CH
3.
In following examples test event to write a Chinese character in simplified form code name as follows:
Specific refractory power and refractive anisotrop use Abbe refractometer under sodium lamp (589nm) light source, 20 DEG C test.Dielectric anisotropy, time of response, voltage tester all use 4 μm of testing cassetes.
Each composition adopted below in an example, all can according to " organic synthesis ", and " organic reaction ", " comprehensive organic synthesis " etc. well known to a person skilled in the art that method is synthesized, or are obtained by commercial sources.These synthetic technologys are conventional, and each liquid crystalline cpd that obtains meets electrical type compound standard after tested.Comparative example 1
Be the component of the liquid-crystal composition of comparative example 1 and the weight percentage of each component listed by table 2, be filled in by this liquid-crystal composition between liquid-crystal display two substrates and carry out performance test, test data is as shown in the table:
The formula of table 2 liquid-crystal composition and test performance thereof
| Component codes | Weight percentage | Performance parameter test result |
| 5CP3 | 13 | Δn[589nm,25℃]=0.090 |
| 2CPWO2 | 12 | Cp[℃]=75.0 |
| 3CWO4 | 10 | Δε[1KHZ,25℃]=-3.0 |
| 5CWO4 | 15.5 | η[mPa.s,20℃]=28 |
| 3CCWO2 | 10 | |
| 5CCWO2 | 10.5 | |
| 5CC3 | 10 | |
| 5CCO1 | 4.5 | |
| 2CCW1 | 4.5 | |
| 3CCW1 | 10 | |
| Add up to | 100 |
Embodiment 1
Be the component of the liquid-crystal composition of embodiment 1 and the weight percentage of each component listed by table 3, be filled in by this liquid-crystal composition between liquid-crystal display two substrates and carry out performance test, test data is as shown in the table:
The formula of table 3 liquid-crystal composition and test performance thereof
| Component codes | Weight percentage | Performance parameter test result |
| 2CPWO2 | 8 | Δn[589nm,25℃]=0.0895 |
| 3CPWO2 | 8 | Cp[℃]=80 |
| 3C1OWO2 | 11 | Δε[1KHZ,25℃]=-3.1 |
| 2CC1OWO2 | 13 | η[mPa.s,20℃]=20 |
| 3CC1OWO2 | 13 | |
| 3CC2 | 24 | |
| 4CC3 | 8 | |
| 3CCO1 | 5 | |
| 3CCP1 | 4 | |
| 3PP1 | 6 | |
| Add up to | 100 |
Comparative example 2
Be the component of the liquid-crystal composition of comparative example 2 and the weight percentage of each component listed by table 4, be filled in by this liquid-crystal composition between liquid-crystal display two substrates and carry out performance test, test data is as shown in the table:
The formula of table 4 liquid-crystal composition and test performance thereof
| Component codes | Weight percentage | Performance parameter test result |
| 5CP3 | 13 | Δn[589nm,25℃]=0.0907 |
| 2CPWO2 | 16 | Cp[℃]=76.7 |
| 3C2WO2 | 9 | Δε[1KHZ,25℃]=-2.97 |
| 3C2WO1 | 9 | η[mPa.s,20℃]=24 |
| 3CC2WO1 | 16 | |
| 3CC2WO2 | 16 | |
| 3CC2 | 6 | |
| 5CC3 | 10 | |
| 5CCO1 | 5 | |
| Add up to | 100 |
Embodiment 2
Be the component of the liquid-crystal composition of embodiment 2 and the weight percentage of each component listed by table 5, be filled in by this liquid-crystal composition between liquid-crystal display two substrates and carry out performance test, test data is as shown in the table:
The formula of table 5 liquid-crystal composition and test performance thereof
| Component codes | Weight percentage | Performance parameter test result |
| 2CPWO2 | 8 | Δn[589nm,25℃]=0.0898 |
| 3CPWO2 | 8 | Cp[℃]=80 |
| 3C1OWO2 | 11 | Δε[1KHZ,25℃]=-3.04 |
| 2CC1OWO2 | 12 | η[mPa.s,20℃]=19 |
| 3CC1OWO2 | 12 | |
| 3CC2 | 24 | |
| 4CC3 | 8 | |
| 5CCO1 | 7 | |
| 3CCP3 | 2 | |
| 5PP1 | 8 | |
| Add up to | 100 |
Comparative example 3
Be the component of the liquid-crystal composition of comparative example 3 and the weight percentage of each component listed by table 6, be filled in by this liquid-crystal composition between liquid-crystal display two substrates and carry out performance test, test data is as shown in the table:
The formula of table 6 liquid-crystal composition and test performance thereof
| Component codes | Weight percentage | Performance parameter test result |
| 2CPWO2 | 7 | Δn[589nm,25℃]=0.0896 |
| 3CPWO2 | 7 | Cp[℃]=77.8 |
| 3C1OWO2 | 13 | Δε[1KHZ,25℃]=-3.09 |
| 2CC1OWO2 | 12 | η[mPa.s,20℃]=20 |
| 3CC1OWO2 | 12 | |
| 3CC2 | 24 | |
| 4CC3 | 8 | |
| 5CC3 | 5 | |
| 3CCP1 | 4 | |
| 5PPO1 | 5 | |
| 3PP1 | 3 | |
| Add up to | 100 |
Embodiment 3
Be the component of the liquid-crystal composition of embodiment 3 and the weight percentage of each component listed by table 7, be filled in by this liquid-crystal composition between liquid-crystal display two substrates and carry out performance test, test data is as shown in the table:
The formula of table 7 liquid-crystal composition and test performance thereof
| Component codes | Weight percentage | Performance parameter test result |
| 2CPWO2 | 7 | Δn[589nm,25℃]=0.0891 |
| 3CPWO2 | 7 | Cp[℃]=77.0 |
| 3C1OWO2 | 12 | Δε[1KHZ,25℃]=-3.10 |
| 2CC1OWO2 | 12 | η[mPa.s,20℃]=19.5 |
| 3CC1OWO2 | 12 | |
| 3CC2 | 24 | |
| 4CC3 | 9 | |
| 3CCO3 | 5 | |
| 3CCP1 | 4 | |
| 5PPO1 | 5 | |
| 3PP1 | 3 | |
| Add up to | 100 |
Embodiment 4
It is the liquid-crystal composition of comparative example 1, comparative example 2, comparative example 3, embodiment 1, embodiment 2 and embodiment 3 listed by table 8, under-20 DEG C of conditions, test described liquid-crystal composition and described liquid-crystal composition is poured into the low temperature property retention energy in liquid crystal cell, wherein, the low temperature property retention of liquid-crystal composition can use LTS
1represent, the low temperature property retention of liquid crystal cell can use LTS
2represent, test data is as shown in the table:
The low temperature property retention energy of table 8 liquid-crystal composition
| LTS 1 | LTS 2 | |
| Comparative example 1 | Clarification in 10 days, crystallization in 11 days | Clarification in 30 days |
| Embodiment 1 | Clarification in 14 days | Clarification in 30 days |
| Comparative example 2 | Clarification in 12 days, crystallization in 13 days | Clarification in 30 days |
| Embodiment 2 | Clarification in 14 days | Clarification in 30 days |
| Comparative example 3 | Clarification in 3 days, crystallization in 4 days | Clarification in 10 days, crystallization in 11 days |
| Embodiment 3 | Clarification in 7 days, crystallization in 8 days | Clarification in 30 days |
Claims (10)
1. a liquid-crystal composition, comprises:
At least one is selected from the compound shown in formula I as the first component
At least one is selected from the compound shown in general formula II as the second component
At least one is selected from the compound shown in general formula III as the 3rd component
At least one is selected from the compound shown in general formulae IV as the 4th component
At least one is selected from the compound shown in general formula V as the 5th component
At least one is selected from the compound of formula VI-1, VI-2 and/or VI-3 as the 6th component
Wherein,
R
1, R
2, R
3, R
4, R
5, R
6, R
7and R
8identical or different, represent the alkene oxygen base of the alkyl of 1-5 carbon atom, the alkoxyl group of a 1-5 carbon atom, the thiazolinyl of a 2-5 carbon atom or 2-5 carbon atom independently of one another;
R
9and R
10identical or different, represent the alkene oxygen base of the alkyl of 1-5 carbon atom, the thiazolinyl of a 2-5 carbon atom or 2-5 carbon atom independently of one another;
M and n is identical or different, represents 0 or 1 independently of one another;
Further, the percentage composition proportioning of this liquid-crystal composition is: the compound of described formula I accounts for the 1-30% of described liquid-crystal composition gross weight; The compound of described general formula II accounts for the 1-40% of described liquid-crystal composition gross weight; The compound of described general formula Ш accounts for the 1-30% of described liquid-crystal composition gross weight; The compound of described general formulae IV accounts for the 1-30% of described liquid-crystal composition gross weight; The compound of described general formula V accounts for the 1-60% of described liquid-crystal composition gross weight; And the compound of described formula VI-1, VI-2 and/or VI-3 accounts for the 1-15% of described liquid-crystal composition gross weight.
2. liquid-crystal composition according to claim 1, is characterized in that, the compound of described formula I accounts for the 5-20% of described liquid-crystal composition gross weight; The compound of described general formula II accounts for the 5-30% of described liquid-crystal composition gross weight; The compound of described general formula Ш accounts for the 5-25% of described liquid-crystal composition gross weight; The compound of described general formulae IV accounts for the 5-25% of described liquid-crystal composition gross weight; The compound of described general formula V accounts for the 15-50% of described liquid-crystal composition gross weight; And the compound of described formula VI-1, VI-2 and/or VI-3 accounts for the 3-10% of described liquid-crystal composition gross weight.
3. liquid-crystal composition according to claim 2, is characterized in that, the compound of described formula I to be selected from the group be made up of following compound one or more compound:
4. liquid-crystal composition according to claim 2, is characterized in that, the compound of described general formula II to be selected from the group be made up of following compound one or more compound:
5. liquid-crystal composition according to claim 2, is characterized in that, the compound of described general formula Ш to be selected from the group be made up of following compound one or more compound:
6. liquid-crystal composition according to claim 2, is characterized in that, the compound of described general formulae IV to be selected from the group be made up of following compound one or more compound:
7. liquid-crystal composition according to claim 2, is characterized in that, the compound of described general formula V to be selected from the group be made up of following compound one or more compound:
8. the liquid-crystal composition according to any one of claim 1-7, is characterized in that, described liquid-crystal composition comprises:
Account for the compound Ш-1 of described liquid-crystal composition gross weight 8%;
Account for the compound Ш-2 of described liquid-crystal composition gross weight 8%;
Account for the chemical compounds I-5 of described liquid-crystal composition gross weight 11%;
Account for the compound ii-4 of described liquid-crystal composition gross weight 13%;
Account for the compound ii-5 of described liquid-crystal composition gross weight 13%;
Account for the compound V-2 of described liquid-crystal composition gross weight 24%;
Account for the compound V-3 of described liquid-crystal composition gross weight 8%;
Account for the compound VI-1 of described liquid-crystal composition gross weight 5%;
Account for the compounds Ⅳ-7 of described liquid-crystal composition gross weight 4%; And
Account for the compounds Ⅳ-11 of described liquid-crystal composition gross weight 6%,
Or described liquid-crystal composition comprises:
Account for the compound Ш-1 of described liquid-crystal composition gross weight 8%;
Account for the compound Ш-2 of described liquid-crystal composition gross weight 8%;
Account for the chemical compounds I-5 of described liquid-crystal composition gross weight 11%;
Account for the compound ii-4 of described liquid-crystal composition gross weight 12%;
Account for the compound ii-5 of described liquid-crystal composition gross weight 12%;
Account for the compound V-2 of described liquid-crystal composition gross weight 24%;
Account for the compound V-3 of described liquid-crystal composition gross weight 8%;
Account for the compound VI-3 of described liquid-crystal composition gross weight 7%;
Account for the compounds Ⅳ-8 of described liquid-crystal composition gross weight 2%; And
Account for the compounds Ⅳ-13 of described liquid-crystal composition gross weight 8%,
Or described liquid-crystal composition comprises:
Account for the compound Ш-1 of described liquid-crystal composition gross weight 7%;
Account for the compound Ш-2 of described liquid-crystal composition gross weight 7%;
Account for the chemical compounds I-5 of described liquid-crystal composition gross weight 12%;
Account for the compound ii-4 of described liquid-crystal composition gross weight 12%;
Account for the compound ii-5 of described liquid-crystal composition gross weight 12%;
Account for the compound V-2 of described liquid-crystal composition gross weight 24%;
Account for the compound V-3 of described liquid-crystal composition gross weight 9%;
Account for the compound VI-2 of described liquid-crystal composition gross weight 5%;
Account for the compounds Ⅳ-7 of described liquid-crystal composition gross weight 4%;
Account for the compounds Ⅳ-14 of described liquid-crystal composition gross weight 5%; And
Account for the compounds Ⅳ-11 of described liquid-crystal composition gross weight 3%.
9. a liquid crystal display device, comprises the liquid-crystal composition according to any one of claim 1-8.
10. liquid crystal display device as claimed in claim 9, it is characterized in that, described liquid crystal display device may be used for IPS pattern, VA pattern, PS-VA pattern, PALC pattern, FFS mode or ecb mode.
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