CN113583684A - Liquid crystal composition and liquid crystal display device - Google Patents
Liquid crystal composition and liquid crystal display device Download PDFInfo
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- CN113583684A CN113583684A CN202111045495.6A CN202111045495A CN113583684A CN 113583684 A CN113583684 A CN 113583684A CN 202111045495 A CN202111045495 A CN 202111045495A CN 113583684 A CN113583684 A CN 113583684A
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- 239000004973 liquid crystal related substance Substances 0.000 title claims abstract description 152
- 239000000203 mixture Substances 0.000 title claims abstract description 125
- 150000001875 compounds Chemical class 0.000 claims abstract description 55
- 125000004432 carbon atom Chemical group C* 0.000 claims description 31
- 125000000217 alkyl group Chemical group 0.000 claims description 13
- 125000003545 alkoxy group Chemical group 0.000 claims description 9
- 125000003342 alkenyl group Chemical group 0.000 claims description 8
- 239000011159 matrix material Substances 0.000 claims description 8
- 239000000463 material Substances 0.000 abstract description 6
- 230000000875 corresponding effect Effects 0.000 description 40
- 238000009472 formulation Methods 0.000 description 38
- 230000000052 comparative effect Effects 0.000 description 21
- 238000012360 testing method Methods 0.000 description 17
- 239000000178 monomer Substances 0.000 description 5
- 229910001220 stainless steel Inorganic materials 0.000 description 4
- 239000010935 stainless steel Substances 0.000 description 4
- 206010047571 Visual impairment Diseases 0.000 description 3
- 150000001412 amines Chemical class 0.000 description 3
- 239000003963 antioxidant agent Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000004611 light stabiliser Substances 0.000 description 3
- 238000002834 transmittance Methods 0.000 description 3
- 230000005856 abnormality Effects 0.000 description 2
- 230000032683 aging Effects 0.000 description 2
- 230000003078 antioxidant effect Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 230000004044 response Effects 0.000 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 description 2
- 230000009471 action Effects 0.000 description 1
- 238000004873 anchoring Methods 0.000 description 1
- 208000003464 asthenopia Diseases 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 125000005647 linker group Chemical group 0.000 description 1
- 238000003760 magnetic stirring Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- -1 methyl compound Chemical group 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 238000004445 quantitative analysis Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 230000016776 visual perception Effects 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
Classifications
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K19/00—Liquid crystal materials
- C09K19/04—Liquid crystal materials characterised by the chemical structure of the liquid crystal components, e.g. by a specific unit
- C09K19/42—Mixtures of liquid crystal compounds covered by two or more of the preceding groups C09K19/06 - C09K19/40
- C09K19/44—Mixtures of liquid crystal compounds covered by two or more of the preceding groups C09K19/06 - C09K19/40 containing compounds with benzene rings directly linked
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
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- Physics & Mathematics (AREA)
- Crystallography & Structural Chemistry (AREA)
- Nonlinear Science (AREA)
- Engineering & Computer Science (AREA)
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Abstract
The invention belongs to the technical field of liquid crystal materials, and particularly relates to a liquid crystal composition and a liquid crystal display element or a liquid crystal display containing the same. The invention discloses a liquid crystal composition, which comprises one or more compounds shown as a formula I and one or more compounds shown as a formula II. The liquid crystal composition has strong alignment force, can effectively improve the stains of the liquid crystal display panel, and is mainly applied to the field of large-size 8K liquid crystal display.
Description
Technical Field
The invention relates to the technical field of liquid crystal display. And more particularly, to a liquid crystal composition and a liquid crystal display device including the same.
Background
With the progress of science and technology and the increasing demand, people pay more attention to the display effect of display terminal products, such as wider color gamut, high contrast, fast response speed, better quality and clear display pictures, and the like. The mainstream display terminal products in the market all adopt the TFT-LCD as the display panel, and the local image quality abnormality of the display terminal products is one of the common quality problems. Common image quality display abnormalities usually appear in the following forms:
afterimage (Image Stacking): when the TFT-LCD is electrified to display the same picture for a long time and then switches the picture to the next picture, the previous picture can remain in the next picture, the phenomenon is called afterimage, and the phenomenon becomes weaker and weaker along with the prolonging of the time and the switching of the picture and finally disappears. Different levels of afterimages affect the quality of the display image of the display to different degrees, and thus do not achieve the best visual perception.
Scintillation (Flicker): it is flicker of liquid crystal when the display panel is driven by applying power, i.e. the change of brightness with refresh frequency or driving frequency, and can also be regarded as the periodic change of liquid crystal transmittance, and is defined accurately as the difference of transmittance between positive frame and negative frame divided by the average transmittance. When the flicker is serious, the visual fatigue of human eyes can be caused.
Zara poor: zara is from japanese and generally refers to a slight light leakage phenomenon occurring in a display area of a liquid crystal panel in a dark state picture. Zara failures are an important indicator of panel yield.
Stain: when the lcd is turned on for a long time and displays the same image, black stains in the local surface and at the edge gradually appear, and actually, a serious light leakage phenomenon appears locally. The main causes of in-plane and edge stains include, for example, poor alignment between the PI material and the liquid crystal material due to impurities, ions, and the like.
As the size of the display product is increased, the resolution is increased, and the display quality of the display terminal is also a great challenge. The currently used liquid crystal composition with negative dielectric anisotropy can be successfully applied to the specifications of FHD, 4K and other panels with medium and large sizes, and the large-size 8K product with higher relative specification can face the quality problems of stains and the like caused by the long-time lighting of the display. Therefore, developing a high-quality liquid crystal material is a key to solve the problem of image quality of display terminals currently facing.
Disclosure of Invention
The technical scheme provided by the invention has the conventional performance of liquid crystal, has high clearing point, large refractive index, good intersolubility and good reliability, especially has strong alignment force, and can effectively improve the in-plane and edge stains of the display.
To achieve the above-mentioned advantageous effects, the present invention provides a liquid crystal composition comprising one or more compounds represented by formula I, one or more compounds represented by formula II,
wherein,
R1an alkenyl group having 2 to 10 carbon atoms;
R2represents an alkoxy group having 1 to 10 carbon atoms;
R3represents an alkyl group having 1 to 10 carbon atoms;
Z1represents a single bond or-CH2O-；
m represents 1 or 2; when m represents 2
May be the same or different;
n represents 0 or 1.
The second object of the present invention is to provide a liquid crystal display device, which is mainly applied to the field of large-sized 8K liquid crystal display.
The third purpose of the invention is to provide a liquid crystal display, which is mainly applied to the field of large-size 8K liquid crystal display.
Effects of the invention
The liquid crystal composition provided by the technical scheme of the invention has the advantages of high clearing point, large refractive index, good intersolubility, good reliability and particularly strong alignment force, can effectively improve the in-plane and edge stains of a display, and is mainly applied to the field of large-size 8K liquid crystal display.
Detailed Description
The invention provides a liquid crystal composition, which comprises one or more compounds shown as a formula I, one or more compounds shown as a formula II,
wherein,
R1an alkenyl group having 2 to 10 carbon atoms;
R2represents an alkoxy group having 1 to 10 carbon atoms;
R3represents an alkyl group having 1 to 10 carbon atoms;
Z1represents a single bond or-CH2O-；
m represents 1 or 2; when m represents 2
May be the same or different;
n represents 0 or 1.
The liquid crystal composition provided by the invention has the advantages that the terminal alkenyl of the compound shown in the formula I is combined with the compound shown in the formula II, the refractive index is higher, the alignment force is stronger, the in-plane and edge stain problems of a liquid crystal display can be effectively improved, and the response speed is higher.
The liquid crystal composition of the present invention is preferably a liquid crystal composition wherein the compound represented by the formula I is selected from the group consisting of compounds represented by the following formulae I-1 to I-3,
wherein,
R1an alkenyl group having 2 to 10 carbon atoms;
R2represents an alkoxy group having 1 to 10 carbon atoms.
The liquid crystal composition of the present invention is preferably such that the aforementioned compounds represented by the formulae I-1 to I-3 are selected from the group consisting of the following compounds represented by the formulae I-1 to I-3-2,
the compound represented by the formula II in the liquid crystal composition is selected from the group consisting of compounds represented by the following formulas II-1 to II-4,
the liquid crystal composition of the invention preferably further comprises one or more compounds shown in formula III,
wherein,
R4、R5each independently represents an alkyl group having 1 to 10 carbon atoms.
In the liquid crystal composition of the present invention, the compound represented by the formula iii preferably contains at least one terminal methyl compound.
In the liquid crystal composition of the present invention, it is preferable that the compound represented by the formula III at least comprises a compound represented by the formula III-1,
the liquid crystal composition of the invention preferably further comprises one or more compounds shown in formula IV,
wherein,
R6represents an alkyl group having 1 to 10 carbon atoms;
R7represents an alkoxy group having 1 to 10 carbon atoms.
In the liquid crystal composition of the present invention, preferably, the compound represented by the above formula IV is preferably selected from the group consisting of compounds represented by the following formulae IV-1 to IV-2,
the liquid crystal composition of the present invention preferably further comprises a compound represented by formula V,
wherein,
R8represents an alkyl group having 1 to 10 carbon atoms;
R9represents an alkyl group having 1 to 10 carbon atoms or an alkenyl group having 2 to 10 carbon atoms.
The liquid crystal composition of the invention preferably further comprises a compound shown as a formula VI,
the liquid crystal composition of the present invention preferably further comprises one or more compounds represented by formula VII,
wherein,
R10represents an alkyl group having 1 to 10 carbon atoms;
R11represents an alkoxy group having 1 to 10 carbon atoms;
e represents 2 or 3, when a plurality of
And, when present, may be the same or different.
The liquid crystal composition of the present invention is preferably such that the aforementioned compound represented by the formula VII is selected from the group consisting of compounds represented by the following formulae VII-1 to VII-4,
the liquid crystal composition of the present invention may preferably contain 0.01% to 0.1% of an antioxidant and a hindered amine light stabilizer.
Preferably, the antioxidant is one selected from the group consisting of antioxidants represented by the formulae K-1 to K-4:
wherein s represents an integer having 1 to 5 carbon atoms;
preferably, the hindered amine light stabilizer is one selected from hindered amine light stabilizers represented by formulas H-1 to H-2
Wherein s represents an integer of 1 to 5 carbon atoms.
The liquid crystal composition disclosed by the invention preferably comprises compounds shown as formulas I-1, I-2 and I-3, and the mass percentage of the compounds is 5% -60%; comprises compounds shown in formulas II-1, II-2, II-3 and II-4, and the mass percentage content is 1-8%; comprises a compound shown as a formula III, and the mass percentage content is 1-12%; comprises a compound shown in a formula IV, and the mass percentage content is 1-15%; comprises a compound shown as a formula V, and the mass percentage content is 18-60%; comprises a compound shown as a formula VI, and the mass percentage content is 1-10%; comprises a compound shown as a formula VII with the mass percentage of 1-10%.
Further preferably, the liquid crystal composition comprises compounds shown as formulas I-1, I-2 and I-3, and the mass percentage of the compounds is 40-50%; comprises compounds shown in formulas II-1, II-2, II-3 and II-4, and the mass percentage content is 1-5%; comprises a compound shown as a formula III, and the mass percentage content is 1-10%; comprises a compound shown in a formula IV, and the mass percentage content is 1-12%; comprises a compound shown as a formula V, and the mass percentage content is 23-50%; comprises a compound shown as a formula VI, and the mass percentage content is 1-8%; comprises a compound shown as a formula VII with the mass percentage of 1-6%.
[ liquid Crystal display element or liquid Crystal display ]
The invention also relates to a liquid crystal display element or a liquid crystal display comprising any one of the liquid crystal compositions; the display element or display is an active matrix display element or display or a passive matrix display element or display.
The liquid crystal display element or liquid crystal display of the present invention is preferably an active matrix addressed liquid crystal display element or liquid crystal display.
Specific examples of the active matrix display element or display include an IPS-TFT, an FFS-TFT, a VA-TFT liquid crystal display element, and other TFT displays, and particularly, an IPS-TFT, FFS-TFT liquid crystal display element or liquid crystal display is suitably used.
The liquid crystal display element or the liquid crystal display of the invention comprises the liquid crystal composition disclosed by the invention. The liquid crystal display element or the liquid crystal display is mainly applied to the field of large-size 8K liquid crystal display, and the liquid crystal display element has good picture display quality.
Examples
In order to more clearly illustrate the invention, the invention is further described below in connection with preferred embodiments. It is to be understood by persons skilled in the art that the following detailed description is illustrative and not restrictive, and is not to be taken as limiting the scope of the invention.
In the invention, the preparation method is a conventional method if no special description is provided, the used raw materials can be obtained from a public commercial way if no special description is provided, the percentages refer to mass percentage, the temperature is centigrade (DEG C), and the specific meanings and test conditions of other symbols are as follows:
cp represents a liquid crystal clearing point (DEG C), and is measured by a DSC quantitative method;
Δ n represents optical anisotropy, and Δ n ═ ne-noWherein n isoRefractive index of ordinary light, neThe refractive index of the extraordinary ray is measured under the conditions of 25 +/-2 ℃ and 589nm, and the Abbe refractometer is used for testing;
Δ ε represents dielectric anisotropy, and Δ ε∥-ε⊥Wherein, epsilon∥Is a dielectric constant parallel to the molecular axis,. epsilon⊥Dielectric constant perpendicular to the molecular axis, at 25 + -0.5 deg.C, 20 μm antiparallel box, INSTEC: ALCT-IR1 test;
γ1expressed as rotational viscosity (mPas) at 25 + -0.5 deg.C, 20 micron antiparallel Box, INSTEC: ALCT-IR1 test;
K11is the splay elastic constant, K33For the flexural elastic constant, the test conditions were: 25 ℃ and INSTEC, ALCT-IR1 and 20 micron antiparallel case;
VHR represents the voltage holding ratio (%), and the test conditions are 60 + -1 deg.C, voltage + -5V, pulse width 10ms, and voltage holding time 166.7 ms. The testing equipment is a TOYO Model 6254 liquid crystal performance comprehensive tester;
the alignment force represents the energy at the interface of the liquid crystal mixture and the alignment layer that needs to be overcome to deflect the director of the liquid crystal molecules away from the easy-to-align axis. The alignment force was characterized by measuring the difference in the lowest brightness at different voltages before and after aging. The test conditions were room temperature and voltage at L127 gray scale. Test equipment CA 310.
Low-temperature observation conditions: pouring 1g of liquid crystal into a 5ml clean glass vial, sealing the vial, placing the vial into a low-temperature refrigerator at-20 ℃, and observing whether the liquid crystal is crystallized or not after 240 hours.
The preparation method of the liquid crystal composition comprises the following steps: weighing each liquid crystal monomer according to a certain proportion, putting the liquid crystal monomers into a stainless steel beaker, putting the stainless steel beaker filled with each liquid crystal monomer on a magnetic stirring instrument for heating and melting, adding a magnetic rotor into the stainless steel beaker after most of the liquid crystal monomers in the stainless steel beaker are melted, uniformly stirring the mixture, and cooling to room temperature to obtain the liquid crystal composition.
The liquid crystal monomer structure of the embodiment of the invention is represented by codes, and the code representation methods of the liquid crystal ring structure, the end group and the connecting group are shown in the following tables 1 and 2.
Corresponding code of the ring structure of Table 1
TABLE 2 corresponding codes for end groups and linking groups
Examples are:
The invention is illustrated below with the following specific examples:
examples
Example 1
The formulation and corresponding properties of the liquid crystal compositions are shown in table 3 below.
TABLE 3 formulation and corresponding Properties of the liquid crystal composition of example 1
Comparative example 1
The formulation and corresponding properties of the liquid crystal compositions are shown in table 4 below.
TABLE 4 formulation and corresponding Properties of the comparative example 1 liquid Crystal composition
Comparative example 2
The formulation and corresponding properties of the liquid crystal compositions are shown in table 5 below.
TABLE 5 formulation and corresponding Properties of the liquid crystal composition of comparative example 2
Comparative example 3
The formulation and corresponding properties of the liquid crystal compositions are shown in table 6 below.
TABLE 6 formulation and corresponding Properties of comparative example 3 liquid Crystal composition
Comparative example 4
The formulation and corresponding properties of the liquid crystal compositions are shown in table 7 below.
TABLE 7 formulation and corresponding Properties of comparative example 4 liquid Crystal composition
Comparative example 5
The formulation and corresponding properties of the liquid crystal compositions are shown in Table 8 below.
TABLE 8 formulation and corresponding Properties of comparative example 5 liquid Crystal composition
Comparative example 6
The formulation and corresponding properties of the liquid crystal compositions are shown in table 9 below.
TABLE 9 formulation and corresponding Properties of comparative example 6 liquid Crystal composition
Comparative example 7
The formulation and corresponding properties of the liquid crystal composition are shown in table 10 below.
TABLE 10 formulation and corresponding Properties of comparative example 7 liquid Crystal composition
Comparative example 8
The formulation and corresponding properties of the liquid crystal compositions are shown in Table 11 below.
TABLE 11 formulation and corresponding Properties of comparative example 8 liquid Crystal composition
Example 2
The formulation and corresponding properties of the liquid crystal compositions are shown in table 12 below.
TABLE 12 formulation and corresponding Properties of the liquid crystal composition of example 2
Example 3
The formulation and corresponding properties of the liquid crystal compositions are shown in Table 13 below.
TABLE 13 formulation and corresponding Properties of the liquid crystal composition of example 3
Example 4
The formulation and corresponding properties of the liquid crystal compositions are shown in Table 14 below.
TABLE 14 formulation and corresponding Properties of the liquid crystal composition of example 4
Example 5
The formulation and corresponding properties of the liquid crystal compositions are shown in Table 15 below.
TABLE 15 formulation and corresponding Properties of the liquid crystal composition of example 5
Example 6
The formulation of the liquid crystal composition and the corresponding properties are shown in Table 16 below.
TABLE 16 formulation and corresponding Properties of the liquid crystal composition of example 6
Example 7
The formulation and corresponding properties of the liquid crystal compositions are shown in Table 17 below.
TABLE 17 formulation and corresponding Properties of the liquid crystal composition of example 7
Example 8
The formulation and corresponding properties of the liquid crystal compositions are shown in Table 18 below.
TABLE 18 formulation and corresponding Properties of the liquid crystal composition of example 8
Example 9
The formulation and corresponding properties of the liquid crystal compositions are shown in Table 19 below.
TABLE 19 formulation and corresponding Properties of the liquid crystal composition of example 9
Example 10
The formulation and corresponding properties of the liquid crystal compositions are shown in Table 20 below.
TABLE 20 formulation and corresponding Properties of the liquid crystal composition of example 10
Example 11
The formulation and corresponding properties of the liquid crystal compositions are shown in Table 21 below.
TABLE 21 formulation and corresponding Properties of the liquid crystal composition of example 11
TABLE 22 alignment force, Low temperature conditions and reliability test data for examples 1-11 and comparative examples 1-8
The alignment force represents the energy at the interface of the liquid crystal composition and the alignment layer that needs to be overcome to deflect the director of the liquid crystal molecules from the easy-alignment axis direction. Under the action of the outside, when the alignment force is strong, the orientation of the liquid crystal director on the surface is always fixed, so that the brightness is not changed; when the alignment force is weak, the director of the liquid crystal molecules at the interface deviates from the easy-to-align axis of anchoring, that is, the liquid crystal molecules at the surface rotate for a certain angle, so that the brightness is changed.
The liquid crystal compositions in the examples and the comparative examples were respectively poured into a test cell to be tested under room temperature, L127 gray scale, and DC bias voltage of + -0.3V; the test equipment is CA 310. Initially, testing the brightness under different direct current bias voltages under the L127 gray scale, and marking the brightness at the lowest point as Lv 1; after aging for 1h by using 10V alternating current, the brightness is tested again under the L127 gray scale, the brightness of the lowest point is marked as Lv2, the strength of the alignment force can be represented by DeltaTr, and the DeltaTr is (Lv2-Lv1)/Lv1 × 100%. The smaller Δ Tr indicates the better alignment force of the liquid crystal.
The liquid crystal compositions of examples and comparative examples were poured into 5ml clean glass vials with 1g of liquid crystal, sealed and placed in a-20 ℃ low temperature refrigerator, and after standing for 240 hours, the liquid crystal was observed for crystal precipitation.
Voltage Holding Ratio (VHR) represents a Voltage Holding Ratio (%) of liquid crystal molecules of the liquid crystal composition after sensing an applied external Voltage, and the liquid crystal compositions of examples and comparative examples were respectively poured into test cells under test conditions of 60 ℃, a Voltage of ± 5V, a pulse width of 10ms, and a Voltage Holding time of 166.7 ms; the testing equipment is a TOYO Model 6254 liquid crystal performance comprehensive tester; the higher the VHR test value is, the better the voltage holding capability of the liquid crystal is, and after the liquid crystal material is applied to the liquid crystal display panel, the smaller the voltage fluctuation of the liquid crystal material on a single pixel of the TFT is, the better the display image quality is.
From the results of the experimental data shown in Table 22, it is clear that example 1, which contains both the compound of formula I and the compound of formula II, has a higher aligning force (smaller. DELTA.Tr) and also has better crystallization and VHR performance than the comparative example, which has a similar composition but does not contain the compound of formula I or the compound of formula II. The combined structure containing the compound shown in the formula I and the compound shown in the formula II can realize high clearing point, large refractive index and good intersolubility, particularly has stronger alignment force, can effectively improve the in-plane and edge stains of a display, and is particularly suitable for the field of large-size liquid crystal display.
It should be understood that the above-mentioned embodiments of the present invention are only examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention, and it will be obvious to those skilled in the art that other variations or modifications may be made on the basis of the above description, and all embodiments may not be exhaustive, and all obvious variations or modifications may be included within the scope of the present invention.
Claims (9)
1. A liquid crystal composition comprising one or more compounds of formula I, one or more compounds of formula II,
wherein,
R1an alkenyl group having 2 to 10 carbon atoms;
R2represents an alkoxy group having 1 to 10 carbon atoms;
R3represents an alkyl group having 1 to 10 carbon atoms;
Z1represents a single bond or-CH2O-；
m represents 1 or 2; two being consecutive when m represents 2
May be the same or different;
n represents 0 or 1.
2. The liquid crystal composition of claim 1, wherein the compound of formula I in the liquid crystal composition is selected from the group consisting of compounds of formulae I-1 to I-3,
wherein,
R1an alkenyl group having 2 to 10 carbon atoms;
R2represents an alkoxy group having 1 to 10 carbon atoms.
3. The liquid crystal composition of any one of claims 1 or 2, further comprising one or more compounds of formula III,
wherein,
R4、R5each independently represents an alkyl group having 1 to 10 carbon atoms.
4. The liquid crystal composition of claim 3, further comprising one or more compounds of formula IV,
wherein,
R6represents an alkyl group having 1 to 10 carbon atoms;
R7represents an alkoxy group having 1 to 10 carbon atoms.
5. The liquid crystal composition of claim 4, further comprising one or more compounds of formula V,
wherein,
R8represents an alkyl group having 1 to 10 carbon atoms;
R9represents an alkyl group having 1 to 10 carbon atoms or an alkenyl group having 2 to 10 carbon atoms.
6. The liquid crystal composition of claim 5, further comprising a compound of formula VI,
7. the liquid crystal composition of claim 6, further comprising one or more compounds of formula VII,
wherein,
R10represents an alkyl group having 1 to 10 carbon atoms;
R11represents an alkoxy group having 1 to 10 carbon atoms;
e represents 2 or 3, and a plurality of
May be the same or different.
8. A liquid crystal display element comprising the liquid crystal composition according to any one of claims 1 to 7, wherein the liquid crystal display element is an active matrix display element or a passive matrix display element.
9. A liquid crystal display comprising the liquid crystal composition according to any one of claims 1 to 7, wherein the liquid crystal display is an active matrix display or a passive matrix display.
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| US20170210991A1 (en) * | 2016-01-25 | 2017-07-27 | Jnc Corporation | Compound having a difluorocyclohexane ring, liquid crystal composition and liquid crystal display device |
| CN109880639A (en) * | 2019-03-29 | 2019-06-14 | 石家庄诚志永华显示材料有限公司 | Liquid-crystal composition, liquid crystal display element, liquid crystal display |
| CN111117658A (en) * | 2018-10-30 | 2020-05-08 | 江苏和成显示科技有限公司 | Liquid crystal composition and display device thereof |
| CN111117659A (en) * | 2018-10-30 | 2020-05-08 | 江苏和成显示科技有限公司 | Liquid crystal composition and display device thereof |
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| TWI638035B (en) * | 2012-09-24 | 2018-10-11 | 捷恩智股份有限公司 | Liquid crystal display element, and liquid crystal composition and use thereof |
| EP3061802B1 (en) * | 2013-10-25 | 2019-09-25 | JNC Corporation | Liquid crystal composition and liquid crystal display device |
| JP6476693B2 (en) * | 2014-02-26 | 2019-03-06 | Jnc株式会社 | Liquid crystal composition and liquid crystal display element |
| EP3730590A1 (en) * | 2014-03-10 | 2020-10-28 | Merck Patent GmbH | Liquid crystal media with homeotropic alignment |
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2021
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| JPH1059918A (en) * | 1996-08-22 | 1998-03-03 | Dainippon Ink & Chem Inc | Asymmetric azine |
| CN106281357A (en) * | 2015-05-21 | 2017-01-04 | 默克专利股份有限公司 | Liquid crystal media and the liquid crystal display comprising it |
| US20170210991A1 (en) * | 2016-01-25 | 2017-07-27 | Jnc Corporation | Compound having a difluorocyclohexane ring, liquid crystal composition and liquid crystal display device |
| CN111117658A (en) * | 2018-10-30 | 2020-05-08 | 江苏和成显示科技有限公司 | Liquid crystal composition and display device thereof |
| CN111117659A (en) * | 2018-10-30 | 2020-05-08 | 江苏和成显示科技有限公司 | Liquid crystal composition and display device thereof |
| CN109880639A (en) * | 2019-03-29 | 2019-06-14 | 石家庄诚志永华显示材料有限公司 | Liquid-crystal composition, liquid crystal display element, liquid crystal display |
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| TWI813031B (en) | 2023-08-21 |
| TW202311500A (en) | 2023-03-16 |
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