Negative dielectric anisotropy liquid crystal composition containing phenanthrene derivative

Abstract

The invention belongs to the technical field of liquid crystal materials, and particularly relates to a negative dielectric anisotropy liquid crystal composition containing a phenanthrene derivative and a liquid crystal display element or a liquid crystal display containing the liquid crystal composition. The liquid crystal composition comprises one or more compounds as shown in the formula I and one or more compounds as shown in the formula II, has the characteristics of high response speed and low driving voltage, and can reduce energy consumption. The liquid crystal composition provided by the invention is suitable for the display field with quick response and low power consumption.

Description

Technical Field

[0001] The present invention relates to the field of liquid crystal display technology, and more specifically to a liquid crystal composition with negative dielectric anisotropy containing a phenanthrene derivative and its application in the field of liquid crystal display. Background Art

[0002] Since the birth of liquid crystal materials, liquid crystal materials have been widely used in the display field and deeply integrated with people's lives. Televisions, computers, smart phones, and smart cars are all inseparable from liquid crystal display devices. Even medical equipment, billboards, price tags, etc. are all application fields of liquid crystal materials. In order to meet people's increasing requirements for display effects, the performance of liquid crystal display devices has been continuously improved, and with it comes increased power consumption. At present, the mainstream products of TVs are 65 inches, the mainstream products of computer monitors are 24 to 27 inches, and the mainstream products of laptops are 16 to 17 inches. The larger the size, the more backlight. In addition, in order to obtain high contrast and high resolution, a brighter backlight is also required, which requires more power to achieve.

[0003] With the rise of the gaming market, the requirements for display response time are getting faster and faster, especially with the industrialization of the mobile gaming market, which requires LCDs to have faster response times. The response of liquid crystal can be divided into two parts: Ton and Toff, where Ton represents the rotation time of the liquid crystal when it is powered on, and Toff represents the time it takes for the liquid crystal to rebound when it is not powered on. It can be seen that Ton can make the liquid crystal rotate faster by increasing the electric field strength; but Toff is the time it takes for the liquid crystal to rotate back after the electric field is removed, and is related to the viscosity γ1 of the liquid crystal and the elastic coefficient K of the liquid crystal itself. ii It is related to the anchoring force of the surface PI on the liquid crystal; therefore, how to improve the Toff of the liquid crystal is an important development direction for improving the response time of the liquid crystal. The Toff formula can be expressed as Toff∝γ1*d2 / K ii characterization, γ1 is the rotational viscosity of the liquid crystal, d is the liquid crystal cell gap, K ii is the elastic coefficient of the liquid crystal, K in IPS / FFS mode ii You can use K 11 Representation.

[0004] At present, the world is facing a global energy shortage, and the concept of carbon neutrality has penetrated into various industries. The requirements for energy consumption of display panels are getting higher and higher, especially with the introduction of the new energy consumption standard ES9.0 in 2022. More and more products are being developed with low power consumption as the direction. The ES9.0 energy standard is a performance-based standard. The specification requires the use of the ANSI / CTA-2037-C test method, and encourages the use of high-efficiency components (such as LEDs, films, power supplies) and energy efficiency features (such as low-voltage drives, local dimming, etc.) to promote more energy-saving product designs. As a field where electrical energy is widely used, it is imperative to reduce energy consumption in the display field. The most direct way to reduce energy consumption is to reduce the driving voltage of the display device. A decrease in driving voltage can directly reduce electrical energy consumption. Introduction to low driving voltage: The driving voltage of liquid crystal V∝|K ii / Δε|, where K 11 is the elastic coefficient of the liquid crystal, and Δε is the dielectric constant of the liquid crystal.

[0005] Therefore, developing a liquid crystal composition with fast response and low driving voltage is a technical problem that needs to be solved urgently. Summary of the invention

[0006] In order to solve one or more of the above technical defects, the present invention provides a negative dielectric anisotropy liquid crystal composition containing a phenanthrene derivative, which has the characteristics of fast response speed, low driving voltage, and can reduce energy consumption. The liquid crystal composition provided by the present invention is suitable for the display field of fast response and low power consumption.

[0007] In order to achieve the above-mentioned beneficial technical effects, the present invention provides a liquid crystal composition comprising one or more compounds of formula I and one or more compounds of formula II.

[0008]

[0009] wherein R1 and R2 each independently represent an alkyl group having 1 to 10 carbon atoms, an alkenyl group having 2 to 10 carbon atoms, an alkoxy group having 1 to 10 carbon atoms, or an alkenyloxy group having 2 to 10 carbon atoms;

[0010] R3 and R4 each independently represent an alkyl group having 1 to 10 carbon atoms, an alkenyl group having 2 to 10 carbon atoms, an alkoxy group having 1 to 10 carbon atoms, or an alkenyloxy group having 2 to 10 carbon atoms, and any -CH2- in R3 is optionally replaced by cyclopropylene, cyclopentyl, replace.

[0011] The second object of the present invention is to provide a liquid crystal display element / liquid crystal display, which is mainly an active matrix display mode.

[0012] Effects of the Invention

[0013] The technical solution provided by the present invention has the characteristics of high optical anisotropy, high dielectric anisotropy, and fast response speed, and its driving voltage is low, which can reduce energy consumption. The liquid crystal composition provided by the present invention is suitable for the field of VR display with fast response and low power consumption. The liquid crystal display element or liquid crystal display provided by the present invention has the characteristics of fast response speed and low power consumption. DETAILED DESCRIPTION

[0014] The present invention provides a liquid crystal composition, which comprises one or more compounds represented by formula I and one or more compounds represented by formula II.

[0015]

[0016] wherein R1 and R2 each independently represent an alkyl group having 1 to 10 carbon atoms, an alkenyl group having 2 to 10 carbon atoms, an alkoxy group having 1 to 10 carbon atoms, or an alkenyloxy group having 2 to 10 carbon atoms;

[0017] R3 and R4 each independently represent an alkyl group having 1 to 10 carbon atoms, an alkenyl group having 2 to 10 carbon atoms, an alkoxy group having 1 to 10 carbon atoms, or an alkenyloxy group having 2 to 10 carbon atoms, and any -CH2- in R3 is optionally replaced by cyclopropylene, cyclopentyl, Substitution; W represents O or S.

[0018] In the liquid crystal composition of the present invention, preferably, the compound represented by the aforementioned formula I is selected from the group consisting of compounds represented by the following formulas I-1 to I-40,

[0019]

[0020]

[0021] In the liquid crystal composition of the present invention, preferably, the mass content of the compound represented by the aforementioned formula I is 1-15%, and more preferably, the mass content of the compound represented by the aforementioned formula I is 4-12%.

[0022] In the liquid crystal composition of the present invention, preferably, in the compound represented by the aforementioned formula II, when R4 represents an alkenyloxy group having 2 to 10 carbon atoms, any -CH2- in R3 is not selected to be replace.

[0023] In the liquid crystal composition of the present invention, preferably, the compound represented by the aforementioned formula II is selected from the group consisting of compounds represented by the following formula II-1 to formula II-56,

[0024]

[0025]

[0026]

[0027] In the liquid crystal composition of the present invention, preferably, the mass content of the compound represented by the aforementioned formula II is 1-15%; further preferably, the mass content of the compound represented by the aforementioned formula II is 5-11%.

[0028] The liquid crystal composition of the present invention, preferably, further comprises one or more compounds represented by formula III,

[0029]

[0030] Here, R5 and R6 each independently represent an alkyl group having 1 to 10 carbon atoms or an alkenyl group having 2 to 10 carbon atoms.

[0031] In the liquid crystal composition of the present invention, preferably, the compound represented by the aforementioned formula III is selected from the group consisting of compounds represented by the following formulae III-1 to III-4,

[0032]

[0033] In the liquid crystal composition of the present invention, preferably, the mass content of the compound represented by the aforementioned formula III is 6-10%.

[0034] The liquid crystal composition of the present invention, preferably, further comprises one or more compounds represented by formula IV,

[0035]

[0036] Here, R7 and R8 each independently represent an alkyl group having 1 to 10 carbon atoms, an alkoxy group having 1 to 10 carbon atoms, or an alkenyl group having 2 to 10 carbon atoms.

[0037] In the liquid crystal composition of the present invention, preferably, the compound represented by the aforementioned formula IV is selected from the group consisting of compounds represented by the following formulas IV-1 to IV-12,

[0038]

[0039] In the liquid crystal composition of the present invention, preferably, the mass content of the compound represented by the aforementioned formula IV is 15-40%; further preferably, the mass content of the compound represented by the aforementioned formula IV is 20-35%.

[0040] The liquid crystal composition of the present invention, preferably, further comprises one or more compounds represented by formula V,

[0041]

[0042] Among them, R9, R 10 Each independently represents an alkyl group having 1 to 10 carbon atoms, an alkenyl group having 2 to 10 carbon atoms, or an alkoxy group having 1 to 10 carbon atoms.

[0043] In the liquid crystal composition of the present invention, preferably, the compound represented by the aforementioned formula V is selected from the group consisting of compounds represented by the following formulas V-1 to V-16,

[0044]

[0045] In the liquid crystal composition of the present invention, preferably, the mass content of the compound represented by the aforementioned formula V is 5-20%; further preferably, the mass content of the compound represented by the aforementioned formula V is 7-19%.

[0046] The liquid crystal composition of the present invention, preferably, further comprises one or more compounds represented by formula VI,

[0047]

[0048] Among them, R 11 , R 12 Each independently represents an alkyl group having 1 to 10 carbon atoms, an alkenyl group having 2 to 10 carbon atoms, or an alkoxy group having 1 to 10 carbon atoms.

[0049] In the liquid crystal composition of the present invention, preferably, the compound represented by the aforementioned formula VI is selected from the group consisting of compounds represented by the following formulas VI-1 to VI-12,

[0050]

[0051]

[0052] In the liquid crystal composition of the present invention, preferably, the mass content of the compound represented by the above formula VI is 5-10%.

[0053] The liquid crystal composition of the present invention, preferably, further comprises one or more compounds represented by formula VII,

[0054]

[0055] Among them, R 13 , R 14 Each independently represents an alkyl group having 1 to 10 carbon atoms, an alkenyl group having 2 to 10 carbon atoms, or an alkoxy group having 1 to 10 carbon atoms;

[0056] express

[0057] In the liquid crystal composition of the present invention, preferably, the compound represented by the aforementioned formula VII is selected from the group consisting of compounds represented by the following formulae VII-1 to VII-42,

[0058]

[0059]

[0060]

[0061] In the liquid crystal composition of the present invention, preferably, the mass content of the compound represented by the aforementioned formula VII is 1-10%; further preferably, the mass content of the compound represented by the aforementioned formula VII is 3-8%.

[0062] The liquid crystal composition of the present invention, preferably, further comprises one or more compounds represented by formula VIII,

[0063]

[0064] Among them, R 15 , R 16 Each independently represents an alkyl group having 1 to 10 carbon atoms, an alkenyl group having 2 to 10 carbon atoms, or an alkoxy group having 1 to 10 carbon atoms, and R 15 , R 16 Any -CH2- in is optionally substituted by cyclopropylene or cyclopentylene; X represents O or S.

[0065] In the liquid crystal composition of the present invention, preferably, the compound represented by the aforementioned formula VIII is selected from the group consisting of compounds represented by the following formulas VIII-1 to VIII-12,

[0066]

[0067] In the liquid crystal composition of the present invention, preferably, the mass content of the compound represented by the aforementioned formula VIII is 1-10%; further preferably, the mass content of the compound represented by formula VIII is 2-7%.

[0068] The liquid crystal composition of the present invention, preferably, further comprises one or more compounds represented by formula IX,

[0069]

[0070] Among them, R 17 , R 18 Each independently represents an alkyl group having 1 to 10 carbon atoms, an alkenyl group having 2 to 10 carbon atoms, an alkoxy group having 1 to 10 carbon atoms, or an alkenyloxy group having 2 to 10 carbon atoms;

[0071] express

[0072] In the liquid crystal composition of the present invention, preferably, the compound represented by the aforementioned formula IX is selected from the group consisting of compounds represented by the following formulas IX-1 to IX-17,

[0073]

[0074] In the liquid crystal composition of the present invention, preferably, the mass content of the compound represented by the aforementioned formula IX is 1-5%.

[0075] The liquid crystal composition of the present invention, preferably, further comprises one or more compounds represented by formula X,

[0076]

[0077] Among them, R 19 , R 20 Each independently represents an alkyl group having 1 to 10 carbon atoms, an alkenyl group having 2 to 10 carbon atoms, or an alkoxy group having 1 to 10 carbon atoms.

[0078] In the liquid crystal composition of the present invention, preferably, the compound represented by the aforementioned formula X is selected from the group consisting of compounds represented by the following formulas X-1 to X-19,

[0079]

[0080] In the liquid crystal composition of the present invention, preferably, the mass content of the compound represented by the aforementioned formula X is 1-10%; further preferably, the mass content of the compound represented by the aforementioned formula X is 3-8%.

[0081] The liquid crystal composition of the present invention, preferably, further comprises one or more compounds represented by formula XI,

[0082]

[0083] Among them, R 21 , R 22 Each independently represents an alkyl group having 1 to 10 carbon atoms, an alkenyl group having 2 to 10 carbon atoms, or an alkoxy group having 1 to 10 carbon atoms.

[0084] In the liquid crystal composition of the present invention, preferably, the compound represented by the aforementioned formula XI is selected from the group consisting of compounds represented by the following formulas XI-1 to XI-24,

[0085]

[0086]

[0087] In the liquid crystal composition of the present invention, preferably, the mass content of the compound represented by the aforementioned formula XI is 5-25%; further preferably, the mass content of the compound represented by the aforementioned formula XI is 9-20%.

[0088] The liquid crystal composition of the present invention preferably has an optical anisotropy of 0.140 to 0.150.

[0089] The liquid crystal composition of the present invention, preferably, further comprises one or more polymerizable compounds.

[0090] In the liquid crystal composition of the present invention, preferably, the polymerizable compound is selected from the group consisting of compounds represented by the following formulae RM-1 to RM-8:

[0091]

[0092] In the liquid crystal composition of the present invention, preferably, the aforementioned polymerizable compound comprises a compound represented by formula RM-1. Further preferably, RM-1 is added on the basis of 100% of the total mass content of the liquid crystal composition, and the added amount is 0.01-0.5%.

[0093] In the liquid crystal composition of the present invention, preferably, dopants with various functions may be added to the aforementioned liquid crystal compound.

[0094] In the liquid crystal composition of the present invention, preferably, the aforementioned dopant is mainly an antioxidant, an ultraviolet absorber, a chiral agent, and the like.

[0095] Antioxidants include,

[0096]

[0097] Here, t represents an integer from 1 to 10.

[0098] Examples of the ultraviolet absorber include:

[0099]

[0100] Preferred chiral agents (levorotatory or dextrorotatory) include, for example:

[0101]

[0102] In the liquid crystal composition of the present invention, preferably, the mass content of the aforementioned dopant is added on the basis of 100% of the total mass content of the liquid crystal composition, and the added amount is preferably between 0.01-1%.

[0103] [Liquid crystal display element or liquid crystal display]

[0104] The present invention also relates to a liquid crystal display element or a liquid crystal display comprising any one of the above liquid crystal compositions; the display element or the display is an active matrix display element or the display.

[0105] The aforementioned active matrix display element or display can specifically include, for example, IPS-TFT or FFS-TFT or VA-TFT liquid crystal display elements or other TFT displays, and is particularly suitable for VA-TFT mode liquid crystal display elements or liquid crystal displays.

[0106] The liquid crystal display element or liquid crystal display of the present invention comprises the liquid crystal composition disclosed in the present invention and can be applied to the fields of television, notebook computer, mobile phone, etc.

[0107] Example

[0108] In order to explain the present invention more clearly, the present invention is further described below in conjunction with preferred embodiments. It should be understood by those skilled in the art that the following specific description is illustrative rather than restrictive, and should not be used to limit the scope of protection of the present invention.

[0109] In the present invention, the preparation methods are conventional methods unless otherwise specified, the raw materials used are all available from public commercial channels unless otherwise specified, the percentages are all mass percentages, the temperatures are in degrees Celsius (°C), and the specific meanings of other symbols and test conditions are as follows:

[0110] Tni represents the clearing point of liquid crystal (℃), measured by DSC quantitative method;

[0111] Δn represents optical anisotropy, Δn = n e -n o , where n o is the refractive index of ordinary light, n e It is the refractive index of extraordinary light, tested under two conditions: 25±2℃ and 60±2℃, 589nm, and Abbe refractometer.

[0112] Δε represents dielectric anisotropy, Δε=ε ∥ -ε ⊥ , where ε ∥ is the dielectric constant parallel to the molecular axis, ε ⊥ is the dielectric constant perpendicular to the molecular axis, the test conditions are 25±0.5℃, 20 μm antiparallel box, INSTEC:ALCT-IR1 test;

[0113] γ1 represents rotational viscosity (mPa·s), the test conditions are 25±0.5℃, 20 μm vertical box, INSTEC: ALCT-IR1 test;

[0114] K 11 is the splay elastic constant, K33 is the bending elastic constant, the test conditions are: 25 °C, INSTEC:ALCT-IR1, 20 μm antiparallel box;

[0115] VHR stands for voltage holding ratio (%), and the test conditions are 60±2°C, voltage ±5V, pulse width 10ms, and voltage holding time 16.7ms. The test equipment is TOYO Model 6254 LCD performance comprehensive tester.

[0116] The preparation method of the liquid crystal composition is as follows: each liquid crystal monomer is weighed according to a certain ratio and put into a stainless steel beaker, and the stainless steel beaker containing each liquid crystal monomer is placed on a magnetic stirring instrument to heat and melt. After most of the liquid crystal monomers in the stainless steel beaker are melted, a magnetic rotor is added to the stainless steel beaker, and the mixture is stirred evenly. After cooling to room temperature, the liquid crystal composition is obtained.

[0117] The liquid crystal monomer structure of the embodiment of the present invention is represented by a code, and the code representation method of the liquid crystal ring structure, end group, and connecting group is shown in Table 1 and Table 2 below.

[0118] Table 1 Corresponding codes of ring structure

[0119]

[0120]

[0121] Table 2 Corresponding codes of terminal groups and linking groups

[0122]

[0123]

[0124] Example:

[0125] Its code is CC-Cp-V1;

[0126] Its code is CPY-2-O2; Its code is CCY-3-O2; Its code is LY-3-O2;

[0127] Its code is Sb-CpO-O4; Its code is Sc-CpO-O4; Its code is CY-3-O2;

[0128] Its code is PP-1-2V; Its code is PGP-5-2; the following specific embodiments are used to illustrate the present invention:

[0129] Example

[0130] Example 1

[0131] Table 3 Formulation of the liquid crystal composition of Example 1

[0132] Liquid crystal monomer code content(%) CC-3-V 20 Ph-2O-O4 4 Ph-2O-O3 4 Sc-3O-OV 4 Sc-4O-OV 5 PP-1-2V1 8 CPY-3-O2 7 CCY-3-O2 12 PY-3-O2 10 PGiY-3-O2 4 Sc-CpO-O2 5 PGP-2-2V 3 PPY-5-O2 3 CY-3-O2 7 CC-3-V1 4

[0133] Example 2

[0134] The formula of the liquid crystal composition and the corresponding properties are shown in Table 4 below.

[0135] Table 4 Formulation of the liquid crystal composition of Example 2

[0136]

[0137]

[0138] Example 3

[0139] The formula of the liquid crystal composition and the corresponding properties are shown in Table 5 below.

[0140] Table 5 Formulation of the liquid crystal composition of Example 3

[0141] Liquid crystal monomer code content(%) CC-3-V 20 Ph-2O-O4 2 Ph-2O-O2 2 Sc-CpX3O-O2 5 Sc-CpX3O-O4 4 PP-1-2V1 8 CPY-3-O2 7 CCY-3-O2 12 PY-3-O2 10 PGiY-3-O2 4 Sc-CpO-O2 5 PGP-2-2V 3 PPY-5-O2 3 PY-1-O2 7 CCP-V-1 4 CC-3-V1 4

[0142] Example 4

[0143] The formula of the liquid crystal composition and the corresponding properties are shown in Table 6 below.

[0144] Table 6 Formulation of the liquid crystal composition of Example 4

[0145]

[0146]

[0147] Example 5

[0148] The formula of the liquid crystal composition and the corresponding properties are shown in Table 7 below.

[0149] Table 7 Formulation of the liquid crystal composition of Example 5

[0150] Liquid crystal monomer code content(%) CC-3-V 30 Ph-2O-O4 4 Ph-2O-O3 4 Ph-2O-O2 4 Sc-4O-OV 5 PP-1-2V1 9 CPY-3-O2 10 CPY-2-O2 7 PY-3-O2 9 PGiY-3-O2 3 S-CpO-O4 5 PGP-2-2V 8 PPY-5-O2 2

[0151] Example 6

[0152] The formula of the liquid crystal composition and the corresponding properties are shown in Table 8 below.

[0153] Table 8 Formulation of the liquid crystal composition of Example 6

[0154]

[0155]

[0156] Example 7

[0157] The formula of the liquid crystal composition and the corresponding properties are shown in Table 9 below.

[0158] Table 9 Formulation of the liquid crystal composition of Example 7

[0159] Liquid crystal monomer code content(%) CC-3-V 24 Ph-2O-O4 6 Sc-CpX3O-O2 5 Sc-CpX3O-O4 4 PP-1-2V1 6 CPY-3-O2 7 CCY-3-O2 12 PY-3-O2 8 PGiY-3-O2 4 Sc-CpO-O2 5 PGP-3-2 3 PPY-5-O2 1 PY-1-O2 7 CCY-2-O2 4 PPY-3-O2 2 Sc-CpO-O4 2

[0160] Comparative Example 1

[0161] The formula of the liquid crystal composition and the corresponding properties are shown in Table 10 below.

[0162] Table 10 Formulation of liquid crystal composition of comparative example 1

[0163]

[0164]

[0165] Comparative Example 2

[0166] The formula of the liquid crystal composition and the corresponding properties are shown in Table 11 below.

[0167] Table 11 Formulation of liquid crystal composition of comparative example 2

[0168] Liquid crystal monomer code content(%) CC-3-V 22 Sc-CpX3O-O2 4 Sc-CpX3O-O4 4 PP-1-2V1 9 CPY-4-O2 8 CPY-2-O2 8 PY-3-O2 8 PGiY-3-O2 5 Sc-CpO-O4 4 PGP-2-2V 4 PPY-5-O2 2 CPY-3-O2 2 CY-3-O2 7 CC-3-V1 5 CCY-3-O2 8

[0169] Comparative Example 3

[0170] The formula of the liquid crystal composition and the corresponding properties are shown in Table 12 below.

[0171] Table 12 Formulation of liquid crystal composition of comparative example 3

[0172]

[0173]

[0174] The performance parameters of Examples 1-7 are shown in Table 13 below, and the performance parameters of Comparative Examples 1-3 are shown in Table 14 below.

[0175] Table 13 Performance parameters of Examples 1-7

[0176] Example 1 Example 2 Example 3 Example 4 Example 5 Example 6 Example 7 T 75.3 75.8 75.1 74.7 74.8 81.9 78 Δn 0.1452 0.1455 0.1486 0.1478 0.1523 0.1428 0.1501 no 1.4931 1.4911 1.4961 1.4964 1.4969 1.4922 1.495 Δε -4.62 -4.59 -4.41 -3.5 -3.4 -3.9 -5.16 e⊥ 9.1 9.19 9.17 7.61 7.64 8.14 10.09 <![CDATA[γ1]]> 93.6 92.7 89.1 71.5 70.7 77.7 93.8 cost 3989 3820 4854 3543 3936 3850 4741 <![CDATA[K 11 ]]> 16.4 16.1 15.7 16 15.7 17.5 16.5 <![CDATA[K 33 ]]> 14.4 14.3 14.2 12.9 12.8 15 13.9

[0177] Table 14 Performance parameters of comparative examples 1-3

[0178] Comparative Example 1 Comparative Example 2 Comparative Example 3 T 76.2 76.1 79.3 Δn 0.1308 0.1377 0.1408 no 1.4918 1.4927 1.4932 Δε -3.43 -3.57 -3.79 e⊥ 7.31 8.03 7.74 <![CDATA[γ1]]> 104.2 94.4 102.1 cost 3843 4519 3525 <![CDATA[K 11 ]]> 15.2 16.2 17.4 <![CDATA[K 33 ]]> 14.3 14 15.5

[0179] The driving voltage and response speed related performance of Examples 1-6 and Comparative Examples 1-3 are compared. The comparison between Examples 1-3 and Comparative Examples 1-3 is shown in Table 15 below, and the comparison between Examples 4-6 and Comparative Examples 1-3 is shown in Table 16 below.

[0180] Table 15 Comparison of driving voltage and response speed between Example 1-3 and Comparative Example 1-3

[0181]

[0182]

[0183] Driving voltage comparison: The driving voltage of the liquid crystals in Example 1, Example 2, and Example 3 is too high; Liquid crystal response time comparison: The rotational viscosity γ1 of the three liquid crystals in Example 1, Example 2, and Example 3 is too high. 11 , γ1 / K of the comparison ratio 11 Obviously higher than the liquid crystal in the embodiment; comparison of response time of box thickness: under the same delay amount Δnd, the three liquid crystals of Example 1, Example 2 and Example 3 need to adapt to a higher box thickness, and the response time is slower than the liquid crystal in the embodiment; comparison of response time after comprehensive consideration of liquid crystal and box thickness: the response time of the three liquid crystals of Example 1, Example 2 and Example 3 is obviously slower than the liquid crystal composition liquid crystal of the present invention, and the two monomer combinations of the present invention are not added to Example 1, so the response time is slower; in summary: the liquid crystal of the present invention has a lower driving voltage and a faster response time, which can meet the market's low power consumption requirements and faster response time requirements at the same time.

[0184] Table 16 Comparison of driving voltage and response speed between Examples 4-6 and Comparative Examples 1-3

[0185]

[0186] When the driving voltage is the same for Example 4-6 and Comparative Example 1-3: the γ1 of the liquid crystal in Comparative Example 1-3 is larger, and the response time is significantly slower than that of Example 4-6 in the liquid crystal of the present invention, and the refractive index of the liquid crystal in Example 4-6 is significantly greater than that of the liquid crystal in Comparative Example 1-3. It can be seen that the liquid crystal in Example 4-6 can adapt to a lower cell gap and achieve a faster response time; after comprehensive consideration of the liquid crystal and the cell thickness, the response time of the liquid crystal in Example 4-6 is significantly faster than that of the comparative example liquid crystal; in summary, under the same driving voltage, the liquid crystal of the present invention has an obvious response time advantage and can be widely used in high refresh display fields such as e-sports display.

[0187] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not limitations on the implementation methods of the present invention. For ordinary technicians in the relevant field, other different forms of changes or modifications can be made based on the above description. It is impossible to list all the implementation methods here. All obvious changes or modifications derived from the technical solution of the present invention are still within the protection scope of the present invention.

Claims

1. A liquid crystal composition with negative dielectric anisotropy containing a phenanthrene derivative, characterized in that: The liquid crystal composition comprises one or more compounds represented by formula I and one or more compounds represented by formula II. in, R1 and R2 each independently represent an alkyl group having 1 to 10 carbon atoms, an alkenyl group having 2 to 10 carbon atoms, an alkoxy group having 1 to 10 carbon atoms, or an alkenyloxy group having 2 to 10 carbon atoms; R3 and R4 each independently represent an alkyl group having 1 to 10 carbon atoms, an alkenyl group having 2 to 10 carbon atoms, an alkoxy group having 1 to 10 carbon atoms, or an alkenyloxy group having 2 to 10 carbon atoms, and any -CH2- in R3 is optionally replaced by cyclopropylene, cyclopentyl, replace; W represents O or S.

2. The liquid crystal composition according to claim 1, characterized in that: The liquid crystal composition further comprises one or more compounds represented by formula III, in, R5 and R6 each independently represent an alkyl group having 1 to 10 carbon atoms or an alkenyl group having 2 to 10 carbon atoms.

3. The liquid crystal composition according to claim 1, characterized in that: The liquid crystal composition further comprises one or more compounds represented by formula IV, in, R7 and R8 each independently represent an alkyl group having 1 to 10 carbon atoms, an alkoxy group having 1 to 10 carbon atoms, or an alkenyl group having 2 to 10 carbon atoms.

4. The liquid crystal composition according to claim 1, characterized in that: The liquid crystal composition further comprises one or more compounds represented by formula V, in, R9, R 10 Each independently represents an alkyl group having 1 to 10 carbon atoms, an alkenyl group having 2 to 10 carbon atoms, or an alkoxy group having 1 to 10 carbon atoms.

5. The liquid crystal composition according to claim 1, characterized in that: The liquid crystal composition further comprises one or more compounds represented by formula VI, in, R 11 , R 12 Each independently represents an alkyl group having 1 to 10 carbon atoms, an alkenyl group having 2 to 10 carbon atoms, or an alkoxy group having 1 to 10 carbon atoms.

6. The liquid crystal composition according to claim 1, characterized in that: The liquid crystal composition further comprises one or more compounds represented by formula VII, in, R 13 , R 14 Each independently represents an alkyl group having 1 to 10 carbon atoms, an alkenyl group having 2 to 10 carbon atoms, or an alkoxy group having 1 to 10 carbon atoms; express 7. The liquid crystal composition according to claim 1, characterized in that: The liquid crystal composition further comprises one or more compounds represented by formula VIII, in, R 15 , R 16 Each independently represents an alkyl group having 1 to 10 carbon atoms, an alkenyl group having 2 to 10 carbon atoms, or an alkoxy group having 1 to 10 carbon atoms, and R 15 , R 16 Any -CH2- in is optionally substituted by cyclopropylene or cyclopentylene; X represents O or S.

8. The liquid crystal composition according to claim 1, characterized in that: The liquid crystal composition further comprises one or more compounds represented by formula IX, in, R 17 , R 18 Each independently represents an alkyl group having 1 to 10 carbon atoms, an alkenyl group having 2 to 10 carbon atoms, an alkoxy group having 1 to 10 carbon atoms, or an alkenyloxy group having 2 to 10 carbon atoms; express 9. The liquid crystal composition according to claim 1, characterized in that: The liquid crystal composition further comprises one or more compounds represented by formula X, in, R 19 , R 20 Each independently represents an alkyl group having 1 to 10 carbon atoms, an alkenyl group having 2 to 10 carbon atoms, or an alkoxy group having 1 to 10 carbon atoms.

10. The liquid crystal composition according to claim 1, characterized in that: The liquid crystal composition further comprises one or more compounds represented by formula XI, in, R 21 , R 22 Each independently represents an alkyl group having 1 to 10 carbon atoms, an alkenyl group having 2 to 10 carbon atoms, or an alkoxy group having 1 to 10 carbon atoms; m represents 0 or 1.

11. A liquid crystal display element or a liquid crystal display, characterized in that: The liquid crystal display device comprises the liquid crystal composition according to any one of claims 1 to 10, wherein the liquid crystal display device is an active matrix display device or a passive matrix display device.

Images