CN105567253A - Liquid crystal composition and liquid crystal display device - Google Patents
Liquid crystal composition and liquid crystal display device Download PDFInfo
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- CN105567253A CN105567253A CN201410557489.2A CN201410557489A CN105567253A CN 105567253 A CN105567253 A CN 105567253A CN 201410557489 A CN201410557489 A CN 201410557489A CN 105567253 A CN105567253 A CN 105567253A
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- 239000004973 liquid crystal related substance Substances 0.000 title claims abstract description 222
- 239000000203 mixture Substances 0.000 title claims abstract description 203
- 150000001875 compounds Chemical class 0.000 claims abstract description 293
- 125000004432 carbon atom Chemical group C* 0.000 claims description 30
- 125000000217 alkyl group Chemical group 0.000 claims description 13
- 125000003545 alkoxy group Chemical group 0.000 claims description 10
- 125000003342 alkenyl group Chemical group 0.000 claims description 8
- 125000003302 alkenyloxy group Chemical group 0.000 claims description 2
- LMBFAGIMSUYTBN-MPZNNTNKSA-N teixobactin Chemical compound C([C@H](C(=O)N[C@@H]([C@@H](C)CC)C(=O)N[C@@H](CO)C(=O)N[C@H](CCC(N)=O)C(=O)N[C@H]([C@@H](C)CC)C(=O)N[C@@H]([C@@H](C)CC)C(=O)N[C@@H](CO)C(=O)N[C@H]1C(N[C@@H](C)C(=O)N[C@@H](C[C@@H]2NC(=N)NC2)C(=O)N[C@H](C(=O)O[C@H]1C)[C@@H](C)CC)=O)NC)C1=CC=CC=C1 LMBFAGIMSUYTBN-MPZNNTNKSA-N 0.000 claims description 2
- DQXKOHDUMJLXKH-PHEQNACWSA-N (e)-n-[2-[2-[[(e)-oct-2-enoyl]amino]ethyldisulfanyl]ethyl]oct-2-enamide Chemical compound CCCCC\C=C\C(=O)NCCSSCCNC(=O)\C=C\CCCCC DQXKOHDUMJLXKH-PHEQNACWSA-N 0.000 claims 2
- 230000003287 optical effect Effects 0.000 abstract description 17
- 238000012360 testing method Methods 0.000 description 29
- 239000000758 substrate Substances 0.000 description 8
- 238000009472 formulation Methods 0.000 description 5
- 230000000052 comparative effect Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 0 C[*+]1C[C@](Cc2ccc(C)cc2)CC1 Chemical compound C[*+]1C[C@](Cc2ccc(C)cc2)CC1 0.000 description 2
- 229910021417 amorphous silicon Inorganic materials 0.000 description 2
- 125000001153 fluoro group Chemical group F* 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910021420 polycrystalline silicon Inorganic materials 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 125000005453 2,5-difluoro-1,4-phenylene group Chemical group [H]C1=C([*:1])C(F)=C([H])C([*:2])=C1F 0.000 description 1
- 125000005449 2-fluoro-1,4-phenylene group Chemical group [H]C1=C([*:2])C([H])=C(F)C([*:1])=C1[H] 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 125000000113 cyclohexyl group Chemical group [H]C1([H])C([H])([H])C([H])([H])C([H])(*)C([H])([H])C1([H])[H] 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 229920005591 polysilicon Polymers 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
Landscapes
- Liquid Crystal Substances (AREA)
Abstract
The invention provides a liquid crystal composition with high dielectric anisotropy and high clearing points. The liquid crystal composition comprises one or more compounds with the general formula I as a first component, one or more compounds with the general formula II as a second component, one or more compounds with the general formula III as a third component and one or more compounds with the general formula IV as a fourth component. The liquid crystal composition has at least one of relatively large dielectric anisotropy, relatively large optical anisotropy, the high clearing points, low threshold voltage and other characteristics, and is applicable to a liquid crystal display device. The invention further provides the liquid crystal display device comprising the liquid crystal composition.
Description
Technical Field
The present invention relates to a liquid crystal composition, and more particularly, to a liquid crystal composition having a large optical anisotropy, a large dielectric anisotropy, a suitable clearing point, and a low viscosity, and a liquid crystal display device including the same.
Background
Liquid crystal display devices are classified into types such as PC (phase change), TN (twisted nematic), STN (super twisted nematic), ECB (electrically controlled birefringence), OCB (optically compensated bend), IPS (in-plane switching), VA (vertical alignment), and the like according to a display mode of liquid crystal. The device is classified into a PM (passive matrix) type and an AM (active matrix) type according to a driving method of the device. PM is classified into static (static) and multiplex (multiplex) types. AM is classified into a TFT (thin film transistor), an MIM (metal insulator metal), and the like. The types of TFTs are amorphous silicon (amorphous silicon) and polycrystalline silicon (polysilicon). The latter is classified into a high temperature type and a low temperature type according to a manufacturing process. Liquid crystal display elements are classified into a reflection type using natural light, a transmission type using backlight, and a semi-transmission type using both light sources of natural light and backlight, depending on the type of light source.
TABLE 1 general characteristics of the compositions and AM elements
| NO. | General characteristics of the composition | General characteristics of AM elements |
| 1 | Wide temperature range of nematic phase | Wide temperature range |
| 2 | Low viscosity | Short response time |
| 3 | Appropriate optical anisotropy | High contrast |
| 4 | Large positive or negative dielectric constant anisotropy | Low critical voltage, low power consumption and high contrast |
| 5 | High resistivity | High voltage holding ratio and high contrast |
| 6 | UV and heat stabilization | Long service life |
Liquid crystal materials need to have suitably high dielectric anisotropy, optical anisotropy, and good low-temperature mutual solubility and thermal stability. In addition, the liquid crystal material should also have low viscosity and short response time, low threshold voltage and high contrast. The anisotropy of the composition is further described with reference to a commercially available liquid crystal display device. The temperature range of the nematic phase is associated with the operating temperature range of the element. The upper limit temperature of the nematic phase is preferably 70 ℃ or higher, and the lower limit temperature of the nematic phase is preferably-10 ℃ or lower. The viscosity of the composition correlates to the response time of the element. In order to display animation in the element, it is preferable that the response time of the element is short. Therefore, it is preferable that the viscosity of the composition is small, and it is more preferable that the viscosity of the composition is small at a low temperature.
The optical anisotropy of the composition correlates with the contrast of the element. In order to maximize the contrast ratio of the liquid crystal display element, the product value (Δ n × d) of the optical anisotropy (Δ n) of the liquid crystal composition and the thickness (d) of the liquid crystal layer may be designed to be a fixed value. The appropriate product value depends on the kind of operation mode. A suitable value for an element like TN mode is about 0.45 μm. In this case, a composition having a large optical anisotropy is preferable for an element having a small liquid crystal layer thickness.
The liquid crystal display element containing the liquid crystal composition having appropriate optical anisotropy can increase the contrast.
A liquid crystal display element containing a liquid crystal composition having a large absolute value of dielectric anisotropy can reduce the base voltage value, reduce the driving voltage, and further reduce the power consumption.
It is generally difficult for a single liquid crystal compound to exert its properties, and it is generally mixed with a plurality of other liquid crystal compounds to prepare a composition. In the existing liquid crystal composition, the better characteristics can be obtained, but the nematic phase temperature range of the composition is not wide enough, the clearing point is lower, the viscosity is higher, the optical anisotropy is not large enough, the dielectric anisotropy is lower, the ultraviolet and high temperature stability is poor, the voltage holding ratio is low, the composition which is mixed to have larger optical anisotropy, suitable dielectric anisotropy, better stability and better contrast is not greatly helped, and the adverse effects of low contrast, slow response speed and the like are directly caused, for example, the liquid crystal compositions disclosed in CN101796162A and CN1475547A have the defects to different degrees.
Therefore, there is a need for a liquid crystal composition having a large optical anisotropy; high dielectric anisotropy; high clearing points; a low threshold voltage; high display contrast, etc.
Disclosure of Invention
The invention aims to provide a liquid crystal composition having characteristics such as large dielectric anisotropy, high optical anisotropy, high clearing point and low threshold voltage.
Another object of the present invention is to provide a liquid crystal display element comprising a liquid crystal composition having characteristics of large dielectric anisotropy, high optical anisotropy, high clearing point, and low threshold voltage, which enables the liquid crystal display element to have high contrast and excellent power saving performance.
In order to achieve the above object, the present invention provides a liquid crystal composition comprising:
one or more compounds of the general formula I as a first component
One or more compounds of the general formula II as a second component
One or more compounds of the formula III as a third component
And
one or more compounds of the formula IV as a fourth component
Wherein,
R1R3、R4and R5The same or different, each independently represents a fluoro group having 1 to 7 carbon atoms or a non-fluoro groupA fluorinated alkyl group, a fluorinated or non-fluorinated alkoxy group having 1 to 7 carbon atoms, or a fluorinated or non-fluorinated alkenyl group having 2 to 7 carbon atoms;
R2represents-H, a fluorinated or non-fluorinated alkyl group having 1 to 7 carbon atoms, a fluorinated or non-fluorinated alkoxy group having 1 to 7 carbon atoms, or a fluorinated or non-fluorinated alkenyl group having 2 to 7 carbon atoms;
to representOrThe above-mentionedOne or more of H may be substituted by F;
ring (C)Ring (C)Ring (C)Ring (C)And ringAre the same or different and each independently representsOr
Ring (C)Ring (C)Ring (C)And ringAre the same or different and each independently representsOr
L1And L2The same or different, each independently represents-H or-F;
Z1and Z2The same or different, each independently represents a single bond, -COO-, -CH2CH2-or-CH2O-；
Z3And Z4The same or different, each independently represents a single bond, -COO-or-CH2O-；
a represents 0, 1 or 2, and when a is 2, the ringMay be the same or different;
b. d and e are the same or different and each independently represent 0 or 1;
wherein when d-e-0, d-1 and e-0 or d-0 and e-1, the ringAnd ringIs not simultaneously
In some embodiments of the present invention, it is preferred that the compound of formula I comprises 1-30% by weight of the total liquid crystal composition; the compound of the general formula II accounts for 15-55% of the total weight of the liquid crystal composition; the compound of the general formula III accounts for 1-40% of the total weight of the liquid crystal composition; and the compound of the general formula IV accounts for 10-50% of the total weight of the liquid crystal composition.
In some embodiments of the present invention, it is preferred that the compound of formula I comprises 5 to 25% by weight of the total liquid crystal composition; the compound of the general formula II accounts for 20-50% of the total weight of the liquid crystal composition; the compound of the general formula III accounts for 5-40% of the total weight of the liquid crystal composition; and the compound of the general formula IV accounts for 10-35% of the total weight of the liquid crystal composition.
In some embodiments of the present invention, preferably, the compound of formula i is selected from one or more compounds of the group consisting of:
and
in some embodiments of the present invention, preferably, the compound of formula ii is selected from one or more compounds of the group consisting of:
and
wherein,
R2represents a fluorinated or non-fluorinated alkyl group having 1 to 7 carbon atoms, or a fluorinated or non-fluorinated alkoxy group having 1 to 7 carbon atoms.
In some embodiments of the present invention, formula II-1 preferably comprises 0 to 35% by weight of the total liquid crystal composition, and in some embodiments of the present invention, formula II-1 preferably comprises 0 to 30% by weight of the total liquid crystal composition.
In some embodiments of the present invention, it is preferable that the general formula II-4 is 0 to 15% by weight based on the total weight of the liquid crystal composition.
In some embodiments of the present invention, the general formula II-5 preferably accounts for 1-25% of the total weight of the liquid crystal composition, and in some embodiments of the present invention, the general formula II-5 preferably accounts for 5-20% of the total weight of the liquid crystal composition.
In some embodiments of the present invention, it is preferable that the general formula II-6 is 0 to 15% by weight based on the total weight of the liquid crystal composition.
In some embodiments of the present invention, it is preferable that the general formula II-9 is 0 to 15% by weight based on the total weight of the liquid crystal composition.
In some embodiments of the present invention, it is preferable that the general formula II-10 is 0 to 15% by weight based on the total weight of the liquid crystal composition.
In some embodiments of the present invention, preferably, the compound of formula II-1 is one or more compounds selected from the group consisting of:
and
in some embodiments of the present invention, preferably, the compound of formula ii-2 is one or more compounds selected from the group consisting of:
and
in some embodiments of the present invention, preferably, the compound of formula II-3 is one or more compounds selected from the group consisting of:
and
in some embodiments of the present invention, preferably, the compound of formula II-4 is one or more compounds selected from the group consisting of:
and
in some embodiments of the present invention, preferably, the compound of formula II-5 is one or more compounds selected from the group consisting of:
and
in some embodiments of the present invention, preferably, the compound of formula II-6 is one or more compounds selected from the group consisting of:
and
in some embodiments of the present invention, preferably, the compound of formula ii-7 is selected from one or more compounds of the group consisting of:
and
in some embodiments of the present invention, preferably, the compound of formula II-8 is selected from one or more compounds of the group consisting of:
and
in some embodiments of the present invention, preferably, the compound of formula ii-9 is selected from one or more compounds of the group consisting of:
and
in some embodiments of the present invention, preferably, the compound of formula II-10 is selected from one or more compounds of the group consisting of:
and
in some embodiments of the present invention, preferably, the compound of formula II-11 is selected from one or more compounds of the group consisting of:
and
in some embodiments of the present invention, preferably, the compound of formula iii is selected from one or more compounds in the group consisting of:
and
wherein,
R3represents a fluorinated or non-fluorinated alkyl group having 1 to 5 carbon atoms, a fluorinated or non-fluorinated alkyl group having 1 to 5 carbon atomsAn alkoxy group which is not fluorinated, or a fluorinated or non-fluorinated alkenyl group having 2 to 5 carbon atoms.
In some embodiments of the present invention, preferably, the compound of formula iii-1 is selected from one or more compounds in the group consisting of:
and
in some embodiments of the present invention, preferably, the compound of formula iii-2 is selected from one or more compounds of the group consisting of:
and
in some embodiments of the present invention, preferably, the compound of formula iii-3 is selected from one or more compounds of the group consisting of:
and
in some embodiments of the present invention, preferably, the compound of formula iii-4 is selected from one or more compounds of the group consisting of:
and
in some embodiments of the invention, preferably, the compound of formula iii-5 is selected from one or more compounds in the group consisting of:
and
in some embodiments of the invention, preferably, the compound of formula iii-6 is selected from one or more compounds in the group consisting of:
and
in some embodiments of the invention, preferably, the compound of formula iii-7 is selected from one or more compounds in the group consisting of:
and
in some embodiments of the invention, preferably, the compound of formula iii-8 is selected from one or more compounds in the group consisting of:
and
in some embodiments of the invention, preferably, the compound of formula iii-9 is selected from one or more compounds in the group consisting of:
and
in some embodiments of the invention, preferably, the compound of formula iii-10 is selected from one or more compounds in the group consisting of:
and
in some embodiments of the invention, preferably, the compound of formula iii-11 is selected from one or more compounds in the group consisting of:
and
in some embodiments of the invention, preferably, the compound of formula iii-12 is selected from one or more compounds in the group consisting of:
and
in some embodiments of the invention, preferably, the compound of formula iii-13 is selected from one or more compounds in the group consisting of:
and
in some embodiments of the present invention, preferably, the compound of formula iv is selected from one or more compounds of the group consisting of:
and
wherein,
R4and R5The same or different, each independently represents an alkyl group having 1 to 5 carbon atoms, an alkoxy group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms or an alkenyloxy group having 2 to 5 carbon atoms.
In some embodiments of the present invention, preferably, the compound of formula IV-1 comprises 1 to 30% by weight of the total liquid crystal composition; as a preferable technical scheme, the compound of the general formula IV-1 accounts for 1-20% of the total weight of the liquid crystal composition.
In some embodiments of the present invention, preferably, the compound of formula IV-5 comprises 1-20% of the total weight of the liquid crystal composition; as a preferable technical scheme, the compound of the general formula IV-5 accounts for 1-10% of the total weight of the liquid crystal composition.
In some embodiments of the present invention, preferably, the compound of formula IV-7 comprises 0 to 25% by weight of the total liquid crystal composition; as a preferable technical scheme, the compound of the general formula IV-7 accounts for 0-20% of the total weight of the liquid crystal composition.
In some embodiments of the present invention, preferably, the compound of formula IV-8 comprises 0-20% by weight of the total liquid crystal composition; as a preferable technical scheme, the compound of the general formula IV-8 accounts for 0-15% of the total weight of the liquid crystal composition.
In some embodiments of the present invention, preferably, the compound of formula IV-10 comprises 1-20% of the total weight of the liquid crystal composition; as a preferable technical scheme, the compound of the general formula IV-10 accounts for 5-15% of the total weight of the liquid crystal composition.
In some embodiments of the present invention, preferably, the compound of formula IV-1 is selected from one or more compounds of the group consisting of:
and
in some embodiments of the present invention, preferably, the compound of formula IV-2 is selected from one or more compounds of the group consisting of:
and
in some embodiments of the present invention, preferably, the compound of formula IV-3 is selected from one or more compounds of the group consisting of:
and
in some embodiments of the present invention, preferably, the compound of formula IV-4 is selected from one or more compounds of the group consisting of:
and
in some embodiments of the present invention, preferably, the compound of formula IV-5 is selected from one or more compounds of the group consisting of:
and
in some embodiments of the present invention, preferably, the compound of formula IV-6 is selected from one or more compounds of the group consisting of:
and
in some embodiments of the present invention, preferably, the compound of formula IV-7 is selected from one or more compounds of the group consisting of:
and
in some embodiments of the present invention, preferably, the compound of formula IV-8 is selected from one or more compounds of the group consisting of:
and
in some embodiments of the present invention, preferably, the compound of formula IV-9 is selected from one or more compounds of the group consisting of:
and
in some embodiments of the present invention, preferably, the compound of formula IV-10 is selected from one or more compounds of the group consisting of:
and
another aspect of the present invention provides a liquid crystal display device comprising the liquid crystal composition of the present invention.
The liquid crystal composition comprising the liquid crystal compound is determined to have the characteristics of large dielectric anisotropy, large optical anisotropy, proper clearing point, low threshold voltage and the like by performing a combination experiment on the compounds and comparing with a control.
In the present invention, unless otherwise specified, the proportions are weight ratios, all temperatures are in degrees centigrade, and the thickness of the box selected for the response time data test is 7 μm.
Detailed Description
The invention will be illustrated below with reference to specific embodiments. It should be noted that the following examples are illustrative of the present invention, and are not intended to limit the present invention. Other combinations and various modifications within the spirit or scope of the present invention may be made without departing from the spirit or scope of the present invention.
For convenience of expression, in the following examples, the group structure of the liquid crystal composition is represented by the code listed in Table 2:
TABLE 2 radical structural code of liquid crystal compounds
Compounds of the following formula are exemplified:
the structural formula is represented by the code listed in Table 2, and can be expressed as: nCGUF, wherein n in the code represents the number of carbon atoms of the left alkyl group, for example, n is "2", that is, the alkyl group is-C2H5(ii) a C in the code represents "cyclohexane group",g in the code represents "2-fluoro-1, 4-phenylene", U in the code represents "2, 5-difluoro-1, 4-phenylene", and F in the code represents a "fluoro substituent".
The abbreviated codes of the test items in the following examples are as follows:
wherein the optical anisotropy is measured by an Abbe refractometer under a sodium lamp (589nm) light source at 25 ℃; the dielectric test cell was of the type TN90, the cell thickness being 7 μm.
V10 test conditions: c/1KHZ, JTSB 7.0.
The components used in the following examples can be synthesized by a known method or obtained commercially. These synthesis techniques are conventional, and the resulting liquid crystal compounds were tested to meet the standards for electronic compounds.
Liquid crystal compositions were prepared according to the compounding ratios of the liquid crystal compositions specified in the following examples. The liquid crystal composition is prepared according to the conventional method in the field, such as heating, ultrasonic wave, suspension and the like, and is mixed according to the specified proportion.
Liquid crystal compositions given in the following examples were prepared and studied. The composition of each liquid crystal composition and the results of the performance parameter test thereof are shown below.
Comparative example 1
The liquid crystal composition of comparative example 1, which was filled between two substrates of a liquid crystal display and subjected to a performance test, was prepared with each compound and weight percentage as listed in table 3, and the test data are shown in the following table:
TABLE 3 liquid crystal composition formula and its test performance
Example 1
The liquid crystal composition of example 1 was prepared according to the compounds and weight percentages listed in table 4, and filled between two substrates of a liquid crystal display for performance testing, and the test data are shown in the following table:
TABLE 4 liquid crystal composition formula and its test performance
Example 2
The liquid crystal composition of example 2 was prepared according to the compounds and weight percentages listed in table 5, and filled between two substrates of a liquid crystal display for performance testing, and the test data are shown in the following table:
TABLE 5 liquid crystal composition formulations and their test properties
Example 3
The liquid crystal composition of example 3 was prepared according to the compounds and weight percentages listed in table 6, and filled between two substrates of a liquid crystal display for performance testing, and the test data are shown in the following table:
TABLE 6 liquid crystal composition formula and its test performance
Example 4
The liquid crystal composition of example 4 was prepared according to the compounds and weight percentages listed in table 7, and filled between two substrates of a liquid crystal display for performance testing, and the test data are shown in the following table:
TABLE 7 liquid crystal composition formulations and their test properties
Example 5
The liquid crystal composition of example 5 was prepared according to the compounds and weight percentages listed in table 8, and filled between two substrates of a liquid crystal display for performance testing, and the test data are shown in the following table:
TABLE 8 liquid crystal composition formulations and their test properties
Example 6
The liquid crystal composition of example 6 was prepared according to the compounds and weight percentages listed in table 9, and filled between two substrates of a liquid crystal display for performance testing, and the test data are shown in the following table:
TABLE 9 liquid crystal composition formulations and their test properties
Example 7
The liquid crystal composition of example 6 was prepared according to the compounds and weight percentages listed in table 10, and filled between two substrates of a liquid crystal display for performance testing, and the test data are shown in the following table:
TABLE 10 liquid crystal composition formulations and their test properties
Referring to comparative example 1, as can be seen from the above test data of examples 1, 2, 3, 4, 5, 6 and 7, the liquid crystal composition provided by the present invention has a large dielectric anisotropy, a large optical anisotropy, a high clearing point, and a low threshold voltage, and is suitable for use in a liquid crystal display device. Compared with the comparative example 1, the liquid crystal composition provided by the invention has better optical anisotropy and dielectric anisotropy, can meet the appropriate clearing point required by a plurality of liquid crystal displays, and can meet the requirements of high contrast and excellent power saving performance of the liquid crystal displays.
Claims (11)
1. A liquid crystal composition comprising:
one or more compounds of the general formula I as a first component
One or more compounds of the general formula II as a second component
One or more compounds of the formula III as a third component
One or more compounds of the formula IV as a fourth component
Wherein,
R1、R3、R4and R5The same or different, each independently represents a fluorinated or non-fluorinated alkyl group having 1 to 7 carbon atoms, a fluorinated or non-fluorinated alkoxy group having 1 to 7 carbon atoms, or a fluorinated or non-fluorinated alkenyl group having 2 to 7 carbon atoms;
R2represents-H, a fluorinated or non-fluorinated alkyl group having 1 to 7 carbon atoms, a fluorinated or non-fluorinated alkoxy group having 1 to 7 carbon atoms, or a fluorinated or non-fluorinated alkenyl group having 2 to 7 carbon atoms;
to represent The above-mentionedOne or more of H may be substituted by F;
ring (C)Ring (C)Ring (C)Ring (C)And ringAre the same or different and each independently representsOr
Ring (C)Ring (C)Ring (C)And ringAre the same or different and each independently represents
L1And L2The same or different, each independently represents-H or-F;
Z1and Z2The same or different, each independently represents a single bond, -COO-, -CH2CH2-or-CH2O-；
Z3And Z4The same or different, each independently represents a single bond, -COO-or-CH2O-；
a represents 0, 1 or 2, and when a is 2, the ringMay be the same or different;
b. d and e are the same or different and each independently represent 0 or 1;
wherein when d-e-0, d-1 and e-0 or d-0 and e-1, the ringAnd ringIs not simultaneously
2. The liquid crystal composition of claim 1, wherein the compound of formula i is selected from one or more compounds of the group consisting of:
3. the liquid crystal composition of claim 1, wherein the compound of formula ii is selected from one or more compounds of the group consisting of:
wherein,
R2represents a fluorinated or non-fluorinated alkyl group having 1 to 7 carbon atoms, or a fluorinated or non-fluorinated alkoxy group having 1 to 7 carbon atoms.
4. The liquid crystal composition of claim 3, wherein the compound of formula II-1 is selected from one or more compounds selected from the group consisting of:
the compound of the general formula II-2 is one or more compounds selected from the group consisting of:
the compound of the general formula II-3 is one or more compounds selected from the group consisting of:
the compound of the general formula II-4 is one or more compounds selected from the group consisting of:
the compound of the general formula II-5 is one or more compounds selected from the group consisting of:
the compound of the general formula II-6 is one or more compounds selected from the group consisting of:
the compound of the general formula II-7 is one or more compounds selected from the group consisting of:
the compound of the general formula II-8 is one or more compounds selected from the group consisting of:
the compound of the general formula II-9 is one or more compounds selected from the group consisting of:
the compound of the general formula II-10 is one or more compounds selected from the group consisting of:
the compound of the general formula II-11 is one or more compounds selected from the group consisting of:
5. the liquid crystal composition of claim 1, wherein the compound of formula iii is selected from one or more compounds of the group consisting of:
wherein,
R3represents a fluorinated or non-fluorinated alkyl group having 1 to 5 carbon atoms, a fluorinated or non-fluorinated alkoxy group having 1 to 5 carbon atoms, or a fluorinated or non-fluorinated alkenyl group having 2 to 5 carbon atoms.
6. Liquid crystal composition according to claim 5, characterized in that the compound of formula III-1 is selected from one or more compounds from the group consisting of:
the compound of formula III-2 is selected from one or more compounds from the group consisting of:
the compound of formula III-3 is selected from one or more compounds from the group consisting of:
the compound of formula III-4 is selected from one or more compounds from the group consisting of:
the compound of formula III-5 is selected from one or more compounds from the group consisting of:
the compound of formula III-6 is selected from one or more compounds from the group consisting of:
the compound of formula III-7 is selected from one or more compounds from the group consisting of:
the compound of formula III-8 is selected from one or more compounds from the group consisting of:
the compound of formula III-9 is selected from one or more compounds from the group consisting of:
the compounds of formula III-10 are selected from one or more compounds from the group consisting of:
the compounds of the general formula III-11 are selected from one or more compounds from the group consisting of:
the compounds of the general formulae III-12 are selected from one or more compounds from the group consisting of:
the compounds of the general formulae III-13 are selected from one or more compounds from the group consisting of:
7. the liquid crystal composition of claim 1, wherein the compound of formula iv is selected from one or more compounds of the group consisting of:
wherein,
R4and R5The same or different, each independently represents an alkyl group having 1 to 5 carbon atoms, an alkoxy group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms or an alkenyloxy group having 2 to 5 carbon atoms.
8. The liquid crystal composition of claim 7, wherein the compound of formula iv-1 is selected from one or more compounds of the group consisting of:
the compound of the general formula IV-2 is selected from one or more compounds of the group consisting of:
the compound of the general formula IV-3 is selected from one or more compounds of the group consisting of:
the compound of formula IV-4 is selected from one or more compounds of the group consisting of:
the compound of formula IV-5 is selected from one or more compounds of the group consisting of:
the compound of formula IV-6 is selected from one or more compounds of the group consisting of:
the compound of formula IV-7 is selected from one or more compounds of the group consisting of:
the compound of formula IV-8 is selected from one or more compounds of the group consisting of:
the compound of formula IV-9 is selected from one or more compounds of the group consisting of:
the compound of formula IV-10 is selected from one or more compounds of the group consisting of:
9. liquid crystal composition according to any one of claims 1 to 8, characterized in that the compound of formula I represents 1 to 30% of the total weight of the liquid crystal composition; the compound of the general formula II accounts for 15-55% of the total weight of the liquid crystal composition; the compound of the general formula III accounts for 1-40% of the total weight of the liquid crystal composition; and the compound of the general formula IV accounts for 10-50% of the total weight of the liquid crystal composition.
10. The liquid crystal composition of claim 9, wherein the liquid crystal composition comprises:
the compound I-2 accounts for 8 percent of the total weight of the liquid crystal composition;
compound I-4 accounting for 8 percent of the total weight of the liquid crystal composition;
13% by weight of compound III-5-2 based on the total weight of the liquid crystal composition;
compound III-10-2 accounting for 4 percent of the total weight of the liquid crystal composition;
compound III-10-1 accounting for 3 percent of the total weight of the liquid crystal composition;
compound III-10-3 accounting for 3 percent of the total weight of the liquid crystal composition;
compound II-5-2 accounting for 20% of the total weight of the liquid crystal composition;
compound II-1-2 accounting for 12 percent of the total weight of the liquid crystal composition;
compound II-1-1 accounting for 12 percent of the total weight of the liquid crystal composition;
a compound IV-1-12 accounting for 5.5 percent of the total weight of the liquid crystal composition;
a compound IV-10-3 accounting for 7.5 percent of the total weight of the liquid crystal composition; and
a compound IV-5-5 accounting for 4 percent of the total weight of the liquid crystal composition,
alternatively, the liquid crystal composition comprises:
compound I-2 accounting for 2% of the total weight of the liquid crystal composition;
compound I-1 accounting for 6 percent of the total weight of the liquid crystal composition;
compound III-5-2 accounting for 8 percent of the total weight of the liquid crystal composition;
compound II-1-2 accounting for 16 percent of the total weight of the liquid crystal composition;
compound II-5-2 accounting for 19 percent of the total weight of the liquid crystal composition;
compound II-1-1 accounting for 14 percent of the total weight of the liquid crystal composition;
a compound IV-10-3 accounting for 6.5 percent of the total weight of the liquid crystal composition;
a compound IV-7-1 accounting for 10 percent of the total weight of the liquid crystal composition;
a compound IV-7-2 accounting for 10 percent of the total weight of the liquid crystal composition;
a compound IV-5-5 accounting for 3 percent of the total weight of the liquid crystal composition;
a compound IV-8-1 accounting for 3.5 percent of the total weight of the liquid crystal composition; and
a compound IV-1-12 accounting for 2 percent of the total weight of the liquid crystal composition,
alternatively, the liquid crystal composition comprises:
the compound I-2 accounts for 8 percent of the total weight of the liquid crystal composition;
compound I-4 accounting for 8 percent of the total weight of the liquid crystal composition;
13% by weight of compound III-5-2 based on the total weight of the liquid crystal composition;
compound III-10-2 accounting for 4 percent of the total weight of the liquid crystal composition;
compound III-10-1 accounting for 3 percent of the total weight of the liquid crystal composition;
compound III-10-3 accounting for 3 percent of the total weight of the liquid crystal composition;
compound II-1-2 accounting for 12 percent of the total weight of the liquid crystal composition;
compound II-5-2 accounting for 15 percent of the total weight of the liquid crystal composition;
compound II-9-2 accounting for 5 percent of the total weight of the liquid crystal composition;
compound II-1-1 accounting for 12 percent of the total weight of the liquid crystal composition;
a compound IV-1-12 accounting for 5.5 percent of the total weight of the liquid crystal composition;
a compound IV-10-3 accounting for 4% of the total weight of the liquid crystal composition;
a compound IV-10-5 accounting for 3.5 percent of the total weight of the liquid crystal composition; and
a compound IV-5-5 accounting for 4 percent of the total weight of the liquid crystal composition,
alternatively, the liquid crystal composition comprises:
compound I-2 accounting for 4 percent of the total weight of the liquid crystal composition;
compound I-3 accounting for 4 percent of the total weight of the liquid crystal composition;
compound III-5-2 accounting for 8 percent of the total weight of the liquid crystal composition;
compound II-1-2 accounting for 16 percent of the total weight of the liquid crystal composition;
compound II-5-2 accounting for 9 percent of the total weight of the liquid crystal composition;
compound II-9-2 accounting for 10 percent of the total weight of the liquid crystal composition;
compound II-1-1 accounting for 14 percent of the total weight of the liquid crystal composition;
a compound IV-10-3 accounting for 3% of the total weight of the liquid crystal composition;
a compound IV-10-1 accounting for 3.5 percent of the total weight of the liquid crystal composition;
a compound IV-7-1 accounting for 10 percent of the total weight of the liquid crystal composition;
a compound IV-7-2 accounting for 10 percent of the total weight of the liquid crystal composition;
a compound IV-5-5 accounting for 3 percent of the total weight of the liquid crystal composition;
a compound IV-8-1 accounting for 3.5 percent of the total weight of the liquid crystal composition; and
a compound IV-1-12 accounting for 2 percent of the total weight of the liquid crystal composition,
alternatively, the liquid crystal composition comprises:
the compound I-2 accounts for 8 percent of the total weight of the liquid crystal composition;
the compound I-3 accounts for 8 percent of the total weight of the liquid crystal composition;
13% by weight of compound III-5-2 based on the total weight of the liquid crystal composition;
compound III-10-2 accounting for 4 percent of the total weight of the liquid crystal composition;
compound III-10-1 accounting for 3 percent of the total weight of the liquid crystal composition;
compound III-10-3 accounting for 3 percent of the total weight of the liquid crystal composition;
compound II-1-2 accounting for 6 percent of the total weight of the liquid crystal composition;
compound II-6-1 accounting for 5 percent of the total weight of the liquid crystal composition;
compound II-5-2 accounting for 15 percent of the total weight of the liquid crystal composition;
compound II-9-2 accounting for 5 percent of the total weight of the liquid crystal composition;
compound II-1-1 accounting for 12 percent of the total weight of the liquid crystal composition;
a compound IV-1-12 accounting for 6.5 percent of the total weight of the liquid crystal composition;
a compound IV-10-3 accounting for 4% of the total weight of the liquid crystal composition;
a compound IV-10-5 accounting for 3.5 percent of the total weight of the liquid crystal composition; and
a compound IV-5-5 accounting for 4 percent of the total weight of the liquid crystal composition,
alternatively, the liquid crystal composition comprises:
3% of compound I-2 by weight of the total liquid crystal composition;
compound I-1 accounting for 5 percent of the total weight of the liquid crystal composition;
compound III-5-2 accounting for 8 percent of the total weight of the liquid crystal composition;
compound II-1-2 accounting for 16 percent of the total weight of the liquid crystal composition;
compound II-5-2 accounting for 9 percent of the total weight of the liquid crystal composition;
compound II-9-2 accounting for 5 percent of the total weight of the liquid crystal composition;
compound II-4-1 accounting for 5 percent of the total weight of the liquid crystal composition;
compound II-10-1 accounting for 4 percent of the total weight of the liquid crystal composition;
compound II-1-1 accounting for 10 percent of the total weight of the liquid crystal composition;
a compound IV-10-3 accounting for 6.5 percent of the total weight of the liquid crystal composition;
a compound IV-7-1 accounting for 7 percent of the total weight of the liquid crystal composition;
a compound IV-7-2 accounting for 8 percent of the total weight of the liquid crystal composition;
a compound IV-5-5 accounting for 3 percent of the total weight of the liquid crystal composition;
a compound IV-8-1 accounting for 8.5 percent of the total weight of the liquid crystal composition; and
a compound IV-1-12 accounting for 2 percent of the total weight of the liquid crystal composition,
alternatively, the liquid crystal composition comprises:
the compound I-2 accounts for 8 percent of the total weight of the liquid crystal composition;
compound I-4 accounting for 8 percent of the total weight of the liquid crystal composition;
compound III-5-2 accounting for 10 percent of the total weight of the liquid crystal composition;
7.5 percent of compound III-5-4 based on the total weight of the liquid crystal composition;
compound III-10-2 accounting for 8 percent of the total weight of the liquid crystal composition;
7% of compound III-10-1 by weight of the total liquid crystal composition;
7% of compound III-10-3 by weight of the total liquid crystal composition;
compound II-5-2 accounting for 15 percent of the total weight of the liquid crystal composition;
compound II-9-2 accounting for 5 percent of the total weight of the liquid crystal composition;
a compound IV-1-12 accounting for 13 percent of the total weight of the liquid crystal composition;
a compound IV-10-3 accounting for 4% of the total weight of the liquid crystal composition;
a compound IV-10-5 accounting for 3.5 percent of the total weight of the liquid crystal composition; and
and (3) a compound IV-5-5 accounting for 4% of the total weight of the liquid crystal composition.
11. A liquid crystal display device comprising the liquid crystal composition of any one of claims 1 to 10.
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| TWI694139B (en) * | 2017-12-21 | 2020-05-21 | 大陸商江蘇和成顯示科技有限公司 | Liquid crystal compound, liquid crystal composition and photoelectric display device |
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