CN105586056B - Liquid-crystal composition and its liquid crystal display device - Google Patents
Liquid-crystal composition and its liquid crystal display device Download PDFInfo
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- 125000004432 carbon atom Chemical group C* 0.000 claims description 22
- 125000000217 alkyl group Chemical group 0.000 claims description 10
- 125000003342 alkenyl group Chemical group 0.000 claims description 8
- 125000003545 alkoxy group Chemical group 0.000 claims description 8
- 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 3
- 101001053401 Arabidopsis thaliana Acid beta-fructofuranosidase 3, vacuolar Proteins 0.000 claims description 2
- 101001053395 Arabidopsis thaliana Acid beta-fructofuranosidase 4, vacuolar Proteins 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 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims 1
- 229910052799 carbon Inorganic materials 0.000 claims 1
- 230000003287 optical effect Effects 0.000 abstract description 15
- 230000014759 maintenance of location Effects 0.000 abstract description 2
- 238000012360 testing method Methods 0.000 description 31
- 0 C=C*C*C(C*1)COC1c(cc1)ccc1-c(cc1N)cc(N)c1N Chemical compound C=C*C*C(C*1)COC1c(cc1)ccc1-c(cc1N)cc(N)c1N 0.000 description 11
- 230000000052 comparative effect Effects 0.000 description 9
- 239000000758 substrate Substances 0.000 description 8
- 230000004044 response Effects 0.000 description 6
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- 229910052731 fluorine Inorganic materials 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000000034 method Methods 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
- KIKDECTVTVCNEL-UHFFFAOYSA-N CNC1COC(c(cc2)ccc2-c(cc2N)cc(N)c2N)OC1 Chemical compound CNC1COC(c(cc2)ccc2-c(cc2N)cc(N)c2N)OC1 KIKDECTVTVCNEL-UHFFFAOYSA-N 0.000 description 1
- IYSDLHXWSPHVFJ-UHFFFAOYSA-N C[IH]C1COC(c(cc2)ccc2-c(cc2N)cc(N)c2N)OC1 Chemical compound C[IH]C1COC(c(cc2)ccc2-c(cc2N)cc(N)c2N)OC1 IYSDLHXWSPHVFJ-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
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- 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
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Abstract
The present invention provides a kind of liquid-crystal composition and its liquid crystal display device.The liquid-crystal composition includes：Account for the compound of the formula I of the liquid-crystal composition gross weight 2 40%；Account for the compound of the formula II of the liquid-crystal composition gross weight 5 30%；Account for the compound of the general formula III of the liquid-crystal composition gross weight 15 55%；Account for the compound of the general formulae IV of the liquid-crystal composition gross weight 2 45%；Account for the compound of the formula V of the liquid-crystal composition gross weight 0 30%.The liquid-crystal composition of the present invention has at least one of the characteristics such as high resistivity, high voltage retention, suitable optical anisotropy, suitable dielectric anisotropy, good ultraviolet and high-temperature stability characteristic, suitable for liquid crystal display device.The present invention also provides the liquid crystal display device for including the liquid-crystal composition.
Description
Technical Field
The present invention relates to a liquid crystal composition and a liquid crystal display device thereof, and more particularly, to a liquid crystal composition having high resistivity and high voltage holding ratio and a liquid crystal display device thereof.
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), and VA (vertical alignment) according to a display mode of liquid crystal. 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.
Among the above operation modes, the ECB mode, the IPS mode, the VA mode, and the like are known as operation modes utilizing the vertical alignment of liquid crystal molecules, and particularly the IPS mode and the VA mode can improve the disadvantage of narrow viewing angle of the display modes such as the TN mode and the STN mode.
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 performance indexes of the composition are further described based on commercially available liquid crystal display elements. 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 large dielectric anisotropy of the composition helps to make the device have a low threshold voltage. Therefore, a large dielectric anisotropy is preferable. The high resistivity of the composition is beneficial to enabling the element to have a large voltage holding ratio, a large contrast ratio, a low afterimage risk and a long service life. Therefore, a composition having a large specific resistance not only at room temperature but also at high temperature in the initial stage is preferable. Preferred are compositions having a large specific resistance not only at room temperature but also at high temperature after long-term use. The stability of the composition against ultraviolet rays and heat is related to the life of the liquid crystal display element. When the stability is high, the life of the element is long. Such characteristics are preferable for liquid crystal display elements used in liquid crystal projectors, liquid crystal televisions, and the like.
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 advantages of high resistivity, high voltage retention rate, good ultraviolet and high-temperature stability and the like cannot be considered while ensuring better characteristics, so that the problem of image sticking of a display is easily caused, and the service life of the display is shortened.
In order to further improve the above properties and the like, the liquid crystal composition must have properties, that is:
(1) the temperature range of nematic phase is wide;
(2) the viscosity is low;
(3) large optical anisotropy;
(4) absolute value of appropriate dielectric anisotropy;
(5) large electrical resistivity;
(6) higher voltage holding ratio.
The temperature range of the nematic phase is related to the temperature range in which the liquid crystal display device is used, and the liquid crystal display device containing the liquid crystal composition having a wide temperature range of the nematic phase as described in (1) can be used as a liquid crystal display device in a wide temperature range.
The liquid crystal display element containing the liquid crystal composition having a low viscosity as described in (2) can shorten the response time. When the response time of the liquid crystal display element is short, it is applicable to animation display. In addition, when the liquid crystal composition is injected into the cell of the liquid crystal display device, the injection time can be shortened, and the workability can be improved.
The liquid crystal display element containing the liquid crystal composition having an appropriate optical anisotropy as described in (3) can increase the contrast ratio.
The liquid crystal display element containing the liquid crystal composition having a large absolute value of dielectric anisotropy as described in (4) can reduce the base voltage value, reduce the driving voltage, and further reduce the power consumption.
The liquid crystal display element containing the liquid crystal composition having a large specific resistance as described in (5) can increase the voltage holding ratio (voltage main ratio) and can increase the contrast ratio (contrast ratio). Therefore, the liquid crystal composition is required to have a large resistivity value in the initial stage and a large resistivity value even after further long-term use.
The liquid crystal display element containing the liquid crystal composition with higher voltage holding ratio in the step (6) can reduce the risk of afterimage of the liquid crystal display element and prolong the service life of the liquid crystal display element.
Although a liquid crystal composition having a large value of the resistivity (ρ) is disclosed in the prior art, as in patent document CN103666485A, the prior art still has a problem that the balance of the performance required for a liquid crystal television, a tablet computer, and the like, such as low viscosity, high resistivity, suitable optical anisotropy, suitable dielectric anisotropy, high response speed, and low driving voltage cannot be achieved at the same time, and the indexes in all aspects cannot be satisfied at the same time.
Therefore, there is a need for a liquid crystal composition having a large optical anisotropy; large dielectric anisotropy; good ultraviolet and high temperature stability; higher resistivity and voltage holding ratio; at least one of characteristics such as an appropriate threshold voltage.
Disclosure of Invention
The invention aims to provide a liquid crystal composition with high resistivity and high voltage holding ratio, which has suitable optical anisotropy, suitable dielectric anisotropy, suitable clearing point, good ultraviolet and high temperature stability, higher resistivity, suitable threshold voltage and higher voltage holding ratio.
Another object of the present invention is to provide a liquid crystal display device, which comprises a composition having suitable optical anisotropy, suitable dielectric anisotropy, high stability to ultraviolet light and high temperature, and large resistivity, and thus has characteristics of high contrast, high voltage holding ratio, low risk of image sticking, and long service life.
In order to achieve the above object, the present invention provides a liquid crystal composition comprising:
2-40% of one or more compounds of formula I based on the total weight of the liquid crystal composition
One or more compounds of the general formula II accounting for 5-30% of the total weight of the liquid crystal composition
15-55% of one or more compounds of formula III based on the total weight of the liquid crystal composition
One or more compounds of the general formula IV accounting for 2-45 percent of the total weight of the liquid crystal composition
And
0-30% of compound of general formula V in total weight of the liquid crystal composition
Wherein,
R1、R2、R3、R4、R5and R6The 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;
ring (C)And ringAre the same or different and each independently representsOr
Ring (C)Independently representOr
L1Is represented by-H or-CH3；
L2And L3The same or different, each independently represents-H or-F;
a is 0 or 1.
The liquid crystal composition of the present invention further comprises:
the compound of the general formula VI accounts for 1-25% of the total weight of the liquid crystal composition
Wherein,
R7and R8The 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;
ring (C)Ring (C)Ring (C)And ringAre the same or different and each independently representsOrWherein, the ringAnd ringIs not simultaneously
b and c are the same or different and each independently represents 0 or 1;
wherein, when b ═ c ═ 0, R7And R8Is not an alkenyl group.
In some embodiments of the present invention, it is preferred that the compound of formula I comprises 4 to 35% by weight of the total liquid crystal composition; the compound of the general formula II accounts for 5-20% of the total weight of the liquid crystal composition; the compound of the general formula III accounts for 30-50% of the total weight of the liquid crystal composition; the compound of the general formula IV accounts for 4-35% of the total weight of the liquid crystal composition; the compound of the general formula V accounts for 0-25% of the total weight of the liquid crystal composition; and the compound of the general formula VI accounts for 5-25% 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 4 to 35% by weight of the total liquid crystal composition; the compound of the general formula II accounts for 5-20% of the total weight of the liquid crystal composition; the compound of the general formula III accounts for 30-50% of the total weight of the liquid crystal composition; the compound of the general formula IV accounts for 4-35% of the total weight of the liquid crystal composition; the compound of the general formula V accounts for 0-20% of the total weight of the liquid crystal composition; and the compound of the general formula VI accounts for 5-20% of the total weight of the liquid crystal composition.
In some embodiments of the present invention, the compound of formula V comprises 1-20% by weight of the total liquid crystal composition; in some embodiments of the present invention, the compound of formula V comprises 1-15% by weight of the total liquid crystal composition.
In some embodiments of the invention, the compound of formula VI comprises 5 to 15 weight percent 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
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
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,
R5independently represents 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.
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
in some embodiments of the present invention, preferably, the compound of formula v is selected from one or more compounds in the group consisting of:
and
in some embodiments of the invention, it is preferred that the compound of formula vi is selected from one or more compounds of the group consisting of:
and
wherein,
R7and R8The same or different, each independently represents an alkyl group having 1 to 5 carbon atoms or an alkoxy group having 1 to 5 carbon atoms.
In some embodiments of the invention, the compound of formula VI-2 comprises 0-10% by weight of the total liquid crystal composition.
In some embodiments of the invention, the compound of formula VI-5 comprises 0-20% by weight of the total liquid crystal composition; in some embodiments of the invention, the compound of formula VI-5 comprises 5 to 15 weight percent of the total liquid crystal composition.
In some embodiments of the invention, the compound of formula VI-8 comprises 0-10% by weight of the total liquid crystal composition.
In some embodiments of the present invention, the compound of formula VI-10 is present in an amount of 0 to 10 weight percent based on the total weight of the liquid crystal composition.
In some embodiments of the present invention, it is preferred that the compound of formula VI-1 is selected from one or more compounds from the group consisting of:
and
in some embodiments of the present invention, it is preferred that the compound of formula vi-2 is selected from one or more compounds of the group consisting of:
and
in some embodiments of the present invention, it is preferred that the compound of formula VI-3 is selected from one or more compounds from the group consisting of:
and
in some embodiments of the present invention, it is preferred that the compound of formula VI-4 is selected from one or more compounds from the group consisting of:
and
in some embodiments of the present invention, it is preferred that the compound of formula VI-5 is selected from one or more compounds from the group consisting of:
and
in some embodiments of the present invention, it is preferred that the compound of formula VI-6 is selected from one or more compounds from the group consisting of:
and
in some embodiments of the present invention, it is preferred that the compound of formula VI-7 is selected from one or more compounds from the group consisting of:
and
in some embodiments of the present invention, it is preferred that the compound of formula VI-8 is selected from one or more compounds from the group consisting of:
and
in some embodiments of the present invention, it is preferred that the compound of formula vi-9 is selected from one or more compounds of the group consisting of:
and
in some embodiments of the present invention, it is preferred that the compound of formula VI-10 is selected from one or more compounds from 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.
According to the invention, through combination experiments on the compounds, and comparison with a control, the liquid crystal composition comprising the liquid crystal compound is determined to have the characteristics of proper optical anisotropy, proper dielectric anisotropy, high resistivity, higher voltage holding ratio, good ultraviolet radiation resistance and the like, and the liquid crystal composition is suitable for liquid crystal display devices.
In the present invention, the proportions are by weight and all temperatures are in degrees centigrade, unless otherwise specified.
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 1:
TABLE 1 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 1, 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 group", U in the code represents "2, 5-difluoro-1, 4-phenylene group", and F in the code represents "fluorine substituent".
The abbreviated codes of the test items in the following examples are as follows:
cp: clearing Point (nematic-isotropic phase transition temperature, degree C.)
Δ n: optical anisotropy (589nm, 25 ℃ C.)
Δ ε: dielectric anisotropy (1KHz, 25 ℃ C.)
ρ: resistivity of
Vth threshold voltage
VHR (initial): initial Voltage holding ratio (%)
Voltage holding ratio (%) after 20min of VHR (UV) UV lamp irradiation
Voltage holding ratio (%) (after incubation at 150 ℃ for 1h at VHR (high temperature)
Wherein the optical anisotropy is measured by an Abbe refractometer under a sodium lamp (589nm) light source at 25 ℃; the dielectric was tested using an LCR instrument, 25 ℃ and a 7 μmTN 90 ° twist format.
Specific resistance (. rho.; measured at 25 ℃ C.; Ω cm)
1.0ml of liquid crystal was injected into the cell, and a DC voltage of 10V was applied. The DC current of the cell 10 seconds after the voltage application was measured to calculate the resistivity.
The resistivity ρ is calculated by the following equation:
(resistivity) { (voltage) × (cell capacity) }/{ (free-flowing current) × (vacuum dielectric constant) }
VHR (initial) was measured using a TOYO6254 type liquid crystal physical property evaluation system; the testing temperature is 25 ℃, and the testing unit period is 166.7 ms;
VHR (UV) was measured using a TOYO6254 type liquid crystal physical property evaluation system; the cell was UV-cooled to room temperature under a UV lamp for 20min (365nm 5mW/cm2), the test temperature was 25 ℃ and the test unit period was 166.7ms,
VHR (high temperature): taking 1g of sample, placing the sample in a small glass bottle, opening the bottle, drying the bottle for 1h in an oven at the temperature of 150 ℃, cooling the bottle to room temperature, and testing the bottle by using a TOYO6254 type liquid crystal physical property evaluation system; the testing temperature is 25 ℃, and the testing unit period is 166.7 ms;
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 2, and the test data are shown in the following table:
TABLE 2 liquid crystal composition formulations and their test properties
Comparative example 2
The liquid crystal composition of comparative example 2, 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
Comparative example 3
The liquid crystal composition of comparative example 3, 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 4, and the test data are shown in the following table:
TABLE 4 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 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 2
The liquid crystal composition of example 2 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 3
The liquid crystal composition of example 3 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 4
The liquid crystal composition of example 4 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 5
The liquid crystal composition of example 5 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
Referring to comparative examples 1, 2 and 3, it can be seen from the above test data of examples 1, 2, 3, 4 and 5 that the liquid crystal composition provided by the present invention has suitable optical anisotropy, suitable dielectric anisotropy, suitable threshold voltage, higher resistivity and higher voltage holding ratio, and referring to comparative examples 1, 2 and 3, after the liquid crystal composition of examples 1, 2, 3, 4 and 5 is subjected to high temperature and UV, the VHR change rate is significantly lower than that of comparative examples 1, 2 and 3, so that the liquid crystal composition has good UV and high temperature stability, and the present invention has the advantages of greatly reducing the risk of image sticking of the liquid crystal display element, improving the service life of the liquid crystal display element, and being suitable for use in the liquid crystal display device.
Claims (12)
1. A liquid crystal composition, comprising:
2-40% of a compound of formula I based on the total weight of the liquid crystal composition
5-30% of a compound of formula II based on the total weight of the liquid crystal composition
15-55% of a compound of formula III based on the total weight of the liquid crystal composition
2-45% by weight of the total weight of the liquid crystal composition of a compound of formula IV selected from one or more compounds of the group consisting of:
and
and
0-30% of compound of general formula V in total weight of the liquid crystal composition
Wherein,
R1、R2、R3、R4and R6The 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; r5Represents 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 group having 2 to 5 carbon atomsOr an alkenyl group which is not fluorinated;
L1is represented by-H or-CH3。
2. The liquid crystal composition of claim 1, further comprising:
the compound of the general formula VI accounts for 1-25% of the total weight of the liquid crystal composition
Wherein,
R7and R8The 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;
ring (C)Ring (C)Ring (C)And ringAre the same or different and each independently representsWherein, the ringAnd ringIs not simultaneously
b and c are the same or different and each independently represents 0 or 1;
wherein, when b ═ c ═ 0, R7And R8Is not an alkenyl group.
3. The liquid crystal composition of claim 2, wherein the compound of formula i comprises 4-35% by weight of the total liquid crystal composition; the compound of the general formula II accounts for 5-20% of the total weight of the liquid crystal composition; the compound of the general formula III accounts for 30-50% of the total weight of the liquid crystal composition; the compound of the general formula IV accounts for 4-35% of the total weight of the liquid crystal composition; the compound of the general formula V accounts for 0-25% of the total weight of the liquid crystal composition; and the compound of the general formula VI accounts for 5-25% of the total weight of the liquid crystal composition.
4. 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:
and
5. 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:
and
6. 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:
and
7. the liquid crystal composition of claim 1, wherein the compound of formula iv-1 is selected from one or more compounds of the group consisting of:
and
the compound of the general formula IV-2 is selected from one or more compounds of the group consisting of:
and
the compound of the general formula IV-3 is selected from one or more compounds of the group consisting of:
and
the compound of formula IV-4 is selected from one or more compounds of the group consisting of:
and
the compound of formula IV-5 is selected from one or more compounds of the group consisting of:
and
the compound of formula IV-6 is selected from one or more compounds of the group consisting of:
and
the compound of formula IV-7 is selected from one or more compounds of the group consisting of:
and
the compound of formula IV-8 is selected from one or more compounds of the group consisting of:
and
the compound of formula IV-9 is selected from one or more compounds of the group consisting of:
and
the compound of formula IV-10 is selected from one or more compounds of the group consisting of:
and
8. the liquid crystal composition of claim 1, wherein the compound of formula v is selected from one or more compounds of the group consisting of:
and
9. the liquid crystal composition of claim 2, wherein the compound of formula vi is selected from one or more compounds of the group consisting of:
and
wherein,
R7and R8The same or different, each independently represents an alkyl group having 1 to 5 carbon atoms or an alkoxy group having 1 to 5 carbon atoms.
10. The liquid crystal composition according to claim 9, wherein the compound of formula vi-1 is one or more compounds selected from the group consisting of:
and
the compound of formula VI-2 is selected from one or more compounds from the group consisting of:
and
the compound of formula VI-3 is selected from one or more compounds from the group consisting of:
and
the compound of formula VI-4 is selected from one or more compounds from the group consisting of:
and
the compound of formula VI-5 is selected from one or more compounds from the group consisting of:
and
the compound of formula VI-6 is selected from one or more compounds from the group consisting of:
and
the compound of formula VI-7 is selected from one or more compounds from the group consisting of:
and
the compound of formula VI-8 is selected from one or more compounds from the group consisting of:
and
the compound of formula VI-9 is selected from one or more compounds from the group consisting of:
and
the compound of formula VI-10 is selected from one or more compounds from the group consisting of:
and
11. liquid crystal composition according to any one of claims 1 to 10, characterized in that it comprises:
a compound IV-9-2 accounting for 3 percent of the total weight of the liquid crystal composition;
compound III-1 in an amount of 45% by weight based on the total weight of the liquid crystal composition;
a compound IV-3-7 accounting for 1 percent of the total weight of the liquid crystal composition;
compound II-6 accounting for 10 percent of the total weight of the liquid crystal composition;
compound II-7 accounting for 6 percent of the total weight of the liquid crystal composition;
compound I-2 accounting for 5 percent of the total weight of the liquid crystal composition;
compound I-3 accounting for 5 percent of the total weight of the liquid crystal composition;
compound I-4 accounting for 6 percent of the total weight of the liquid crystal composition;
6 percent of compound V-2 in the total weight of the liquid crystal composition;
6 percent of compound V-4 in percentage by total weight of the liquid crystal composition; and
a compound VI-5-1 accounting for 7 percent of the total weight of the liquid crystal composition,
alternatively, the liquid crystal composition comprises:
a compound IV-6-2 accounting for 18 percent of the total weight of the liquid crystal composition;
a compound IV-6-4 accounting for 9 percent of the total weight of the liquid crystal composition;
a compound IV-9-2 accounting for 3 percent of the total weight of the liquid crystal composition;
3% of compound I-2 by weight of the total liquid crystal composition;
compound I-3 accounting for 4 percent of the total weight of the liquid crystal composition;
39% by weight of compound III-1 based on the total weight of the liquid crystal composition;
11 percent of compound II-6 in the total weight of the liquid crystal composition;
a compound V-2 accounting for 4 percent of the total weight of the liquid crystal composition;
a compound VI-5-1 accounting for 3 percent of the total weight of the liquid crystal composition;
a compound VI-5-3 accounting for 4 percent of the total weight of the liquid crystal composition; and
a compound VI-7-1 accounting for 2 percent of the total weight of the liquid crystal composition,
alternatively, the liquid crystal composition comprises:
a compound VI-6-1 accounting for 2 percent of the total weight of the liquid crystal composition;
a compound VI-10-3 accounting for 3 percent of the total weight of the liquid crystal composition;
a compound IV-6-2 accounting for 18 percent of the total weight of the liquid crystal composition;
6-4 of a compound IV-6-4 accounting for 6 percent of the total weight of the liquid crystal composition;
compound I-2 accounting for 2% 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;
a compound IV-9-1 accounting for 3 percent of the total weight of the liquid crystal composition;
a compound IV-9-2 accounting for 3 percent of the total weight of the liquid crystal composition;
a compound IV-9-3 accounting for 2% of the total weight of the liquid crystal composition;
37% by weight of compound III-1, based on the total weight of the liquid crystal composition;
compound II-6 accounting for 16 percent of the total weight of the liquid crystal composition; and
a compound V-2 accounting for 4 percent of the total weight of the liquid crystal composition,
alternatively, the liquid crystal composition comprises:
a compound IV-9-2 accounting for 3 percent of the total weight of the liquid crystal composition;
compound III-1 in an amount of 45% by weight based on the total weight of the liquid crystal composition;
a compound IV-3-7 accounting for 1 percent of the total weight of the liquid crystal composition;
compound II-6 accounting for 5 percent of the total weight of the liquid crystal composition;
compound II-7 accounting for 9 percent of the total weight of the liquid crystal composition;
a compound VI-4-6 accounting for 2 percent of the total weight of the liquid crystal composition;
a compound VI-8-1 accounting for 2 percent of the total weight of the liquid crystal composition;
compound I-2 accounting for 4 percent of the total weight of the liquid crystal composition;
compound I-3 accounting for 6 percent of the total weight of the liquid crystal composition;
compound I-4 accounting for 6 percent of the total weight of the liquid crystal composition;
a compound V-2 accounting for 5 percent of the total weight of the liquid crystal composition;
6 percent of compound V-4 in percentage by total weight of the liquid crystal composition; and
a compound VI-5-1 accounting for 6 percent of the total weight of the liquid crystal composition,
alternatively, the liquid crystal composition comprises:
a compound IV-6-2 accounting for 13 percent of the total weight of the liquid crystal composition;
a compound IV-6-4 accounting for 9 percent of the total weight of the liquid crystal composition;
a compound IV-9-2 accounting for 3 percent of the total weight of the liquid crystal composition;
compound I-2 accounting for 2% of the total weight of the liquid crystal composition;
compound I-3 accounting for 5 percent of the total weight of the liquid crystal composition;
37% by weight of compound III-1, based on the total weight of the liquid crystal composition;
11 percent of compound II-6 in the total weight of the liquid crystal composition;
a compound VI-5-1 accounting for 3 percent of the total weight of the liquid crystal composition;
a compound VI-5-3 accounting for 4 percent of the total weight of the liquid crystal composition;
a compound VI-7-1 accounting for 2 percent of the total weight of the liquid crystal composition;
a compound IV-5-2 accounting for 3 percent of the total weight of the liquid crystal composition;
a compound IV-7-1 accounting for 2 percent of the total weight of the liquid crystal composition;
a compound IV-10-2 accounting for 4% of the total weight of the liquid crystal composition; and
and the compound VI-2-2 accounts for 2 percent of the total weight of the liquid crystal composition.
12. A liquid crystal display device comprising the liquid crystal composition of any one of claims 1 to 11.
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1137116C (en) * | 1996-10-22 | 2004-02-04 | 智索公司 | Dioxane derivatives, liquid crystal compositions containing them, and liquid crystal display devices using them |
| CN102666785B (en) * | 2009-09-24 | 2014-03-12 | 捷恩智株式会社 | Liquid-crystal composition and liquid-crystal display element |
| TW201422790A (en) * | 2012-12-04 | 2014-06-16 | Jnc Corp | Liquid crystal composition and use thereof, liquid crystal display element |
| CN103937508A (en) * | 2014-04-28 | 2014-07-23 | 北京八亿时空液晶科技股份有限公司 | Liquid crystal composition with stable threshold voltage and application thereof |
| CN104610982A (en) * | 2013-11-05 | 2015-05-13 | 江苏和成显示科技股份有限公司 | Liquid crystal composition and display device thereof |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3511846B2 (en) * | 1996-10-22 | 2004-03-29 | チッソ株式会社 | Liquid crystal composition and liquid crystal display device |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1137116C (en) * | 1996-10-22 | 2004-02-04 | 智索公司 | Dioxane derivatives, liquid crystal compositions containing them, and liquid crystal display devices using them |
| CN102666785B (en) * | 2009-09-24 | 2014-03-12 | 捷恩智株式会社 | Liquid-crystal composition and liquid-crystal display element |
| TW201422790A (en) * | 2012-12-04 | 2014-06-16 | Jnc Corp | Liquid crystal composition and use thereof, liquid crystal display element |
| CN104610982A (en) * | 2013-11-05 | 2015-05-13 | 江苏和成显示科技股份有限公司 | Liquid crystal composition and display device thereof |
| CN103937508A (en) * | 2014-04-28 | 2014-07-23 | 北京八亿时空液晶科技股份有限公司 | Liquid crystal composition with stable threshold voltage and application thereof |
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