TWI882339B - Fast-response liquid crystal composition and its application - Google Patents

Abstract

The present invention belongs to the field of liquid crystal material technology, and specifically relates to a liquid crystal composition and a liquid crystal display element or liquid crystal display containing the liquid crystal composition. The liquid crystal composition of the present invention comprises one or more compounds represented by formula I and one or more compounds represented by formula II. The technical solution provided by the present invention has a suitable upper and lower limit range of working temperature, suitable dielectric anisotropy, especially large optical anisotropy, good mutual solubility, especially very good low temperature stability at -30°C and -40°C, and excellent backlight aging performance; it can be used to develop liquid crystal displays with faster response speed, especially to improve the afterimage phenomenon; the liquid crystal composition of the present invention is particularly suitable for 3D display technology. Ⅰ Ⅱ

Description

Fast-response liquid crystal composition and its application

The present invention relates to the field of liquid crystal display technology. More specifically, it relates to a fast-response liquid crystal composition and its application in the field of liquid crystal display.

With the rapid development of science and technology, people are applying liquid crystals to the display field, and the application is becoming more and more extensive, mainly in display terminals such as mobile phones, computers, televisions, car-mounted, outdoor displays, and medical equipment. As people's requirements for display technology continue to increase, the display industry is also constantly moving forward, and the application and demand for liquid crystal display components are also increasing.

In recent years, the global LCD panel industry has faced two major problems: the first is the continued weakness in market demand; the second is the continued decline in prices. How to deal with the annual price decline of nearly double-digit products? Simply increasing product size and industry scale is not the best way. Therefore, developing more value-added panel products and stabilizing the price per unit display area are the fundamental interests of LCD panel companies. There are four ways to achieve this: incell or ONcell touch-integrated screens; 4K or even higher resolution screens; 3D and naked-eye 3D screens; and transitioning to OLED as soon as possible.

Among them, the first one has little to do with the TV industry, which accounts for the majority of LCD panel production capacity, because the color TV market does not have such a large-scale and strong demand for touch screens, and the integrated large-size touch technology is not yet mature. The last one, the transition to OLED, faces the double bottleneck of increased investment burden and immature technology. Therefore, the common choice of panel companies is to promote the development of 4K products as soon as possible and introduce higher-level 3D technology, that is, products with naked-eye 3D technology in a timely manner. In the process of panel and color TV companies promoting the popularization of 4K products, the introduction of naked-eye 3D has an inevitable internal urgency. Because the entire LCD industry chain has to face the embarrassment that the source of 4K content, especially the content of 4K TV programs, is almost zero. If the question of what 4K is useful for is not solved, it will be difficult for consumers to pay for 4K on a large scale. Coincidentally, the bottleneck of existing naked-eye 3D technology is low resolution. Because more pixels are used to present the original picture in a unit space to realize naked-eye 3D, the resolution will be sacrificed by more than half, or even three-quarters. Therefore, if naked-eye 3D is realized and high-definition effect is guaranteed, the LCD panel must provide at least four times the high-definition resolution. Therefore, 4K is actually an "entry-level" resolution for naked-eye 3D. High-resolution display screens have to face the problem of reduced panel opening rate, and the reduction in opening rate leads to a reduction in display screen brightness. In order to obtain a higher display screen brightness, it can be solved by increasing the brightness of the backlight or increasing the transmittance of the liquid crystal material. The brightness of a 4K resolution display is 1800nit, which requires the liquid crystal material to be able to resist aging under long-term exposure to high-brightness backlight.

Liquid crystal materials have two types of applications in 3D display. One is to make liquid crystal panels for display, and the other is to make auxiliary devices such as liquid crystal shutter glasses, liquid crystal gratings and liquid crystal lenses to achieve 2D/3D effect conversion.

For LCD panels, no matter which 3D display method is to be applied, due to the end user's pursuit of smoother viewing effects (especially for sports programs and racing games), reducing the response time of the LCD and making the LCD panel have a faster refresh rate are important goals that manufacturers continue to pursue. A complete response time cycle includes the LCD twist time and recovery time, which are respectively expressed as rise time (Risetime) τ _r and fall time (Falltime) τ _d . They are related to the LCD parameters as shown in formulas (1) and (2): τ _r =γ ₁ d ² /ε ₀ △ε(V ² -V ² _th ) (1)

τ _d =γ ₁ d ² /π ² K _ii (2)

Among them, _γ1 is the rotational viscosity of the liquid crystal material, d is the liquid crystal unit cell gap, V is the liquid crystal unit cell driving voltage, _Vth is the threshold voltage of the liquid crystal material, △ε is the dielectric anisotropy coefficient of the liquid crystal material, and _ε0 is the vacuum capacitance.

For V _th and K _ii , in TN (twisted nematic) mode:

K _ii =K ₁₁ +(K ₃₃ -2K ₂₂ )/4

In IPS (In-Plane Switching) mode:

K _ii =K ₂₂

In VA (Vertical Alignment) mode:

K _ii =K ₃₃

_K11 is the splay elastic constant of the liquid crystal material, _K22 is the twist elastic constant of the liquid crystal material, _K33 is the bending elastic constant of the liquid crystal material, and 1 is the pole spacing.

It can be seen from the above formula that to shorten the response time, efforts can be made in four aspects: reducing the rotational viscosity of the liquid crystal material; reducing the gap between the liquid crystal cells; increasing the driving voltage of the liquid crystal cells; and increasing the dielectric anisotropy coefficient of the liquid crystal material. Among them, by improving the process, the gap between the liquid crystal cells can be reduced. The reduction of the gap increases the anchoring force of the orientation layer on the liquid crystal, so that the liquid crystal molecules can be twisted into place faster, which helps to improve the response speed. Increasing the driving voltage of the liquid crystal cell can also make the liquid crystal molecules twist into place faster to improve the response speed, but at the same time increase the power consumption and the cost of the drive module. The rotational viscosity and dielectric anisotropy coefficient of liquid crystal materials are directly related to the characteristics of the liquid crystal materials themselves. Researchers need to conduct repeated experiments and multi-faceted comparative tests to determine a stable liquid crystal material that can meet the requirements of low response time. This requires continuous efforts from liquid crystal material researchers.

In another aspect of the use of liquid crystal materials in 3D display, liquid crystal valves for active shutter glasses and liquid crystal gratings for parallax barrier 3D technology have long been widely used, and the research on columnar lens technology made of liquid crystal materials is in the ascendant. Since the use of liquid crystal materials as lens refractive materials enables columnar lens technology to achieve 2D/3D display conversion, since it is necessary to add a liquid crystal box to the existing liquid crystal box to control optical refraction, from a practical point of view, it is hoped that the box should be made thinner, which can reduce the thickness of the device on the one hand, and on the other hand, as mentioned above, it can make the optical lens have a faster response time. And we know that under the condition of a certain transmittance, the box thickness (d) is inversely proportional to the optical anisotropy coefficient (△n) of the liquid crystal, so using a thinner liquid crystal box means using a liquid crystal with a larger △n. From the perspective of liquid crystal molecules, an effective way to increase the optical anisotropy coefficient of liquid crystal materials is to increase the number of delocalized conjugated π bonds of liquid crystal molecules, but such large conjugated compounds usually have poor solubility.

In summary, in order to realize 3D display on LCD devices and maintain good viewing effects, the panel performance needs to be continuously improved. For example, in order to ensure brightness, the backlight intensity and the number of LED light sources need to be increased; in order to achieve better resolution, more pixels need to be integrated on the panel; in order to increase the response speed, the panel needs to be made thinner, so that the viscosity of the liquid crystal is lower and the refractive index is higher; in order to improve the viewing point and viewing angle, a more complete face recognition system and 3D display technology need to be developed, and these require the participation of liquid crystal materials.

Therefore, developing a liquid crystal composition with a faster response speed, greater solubility and good reliability, especially high reliability after backlight aging, is a technical problem that needs to be solved urgently.

In order to solve one or more of the above technical defects, the present invention provides a technical solution. The technical solution provided by the present invention has a suitable upper and lower limit range of working temperature, suitable dielectric anisotropy, especially large optical anisotropy, good mutual solubility, especially very good low temperature stability at -30℃ and -40℃, and excellent backlight aging performance; it can be used to develop liquid crystal displays with faster response speed, especially to improve the afterimage phenomenon; the liquid crystal composition of the present invention is particularly suitable for 3D display technology.

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,

表示

、

、

或

；m表示0、1或2；且當m表示2時，兩個

可相同或不同；n表示0或1。 wherein R ₁ , R ₂ , R ₃ , and R ₄ each independently represent 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; Z ₁ represents -CH ₂ CH ₂ -, -CH ₂ O-, -CH=CH-, or a single bond;

express

,

,

or

; m represents 0, 1 or 2; and when m represents 2, the two

Can be the same or different; n represents 0 or 1.

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.

Invention effect

The technical solution provided by the present invention has a suitable upper and lower limit range of working temperature, suitable dielectric anisotropy, especially large optical anisotropy, good mutual solubility, especially very good low temperature stability at -30℃ and -40℃, and excellent backlight aging performance; it can be used to develop liquid crystal displays with faster response speed, especially to improve the afterimage phenomenon; the liquid crystal composition of the present invention is particularly suitable for 3D display technology.

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.

表示

、

、

或

；m表示0、1或2；且當m表示2時，兩個

可相同或不同；n表示0或1。 wherein R ₁ , R ₂ , R ₃ , and R ₄ each independently represent 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; Z ₁ represents -CH ₂ CH ₂ -, -CH ₂ O-, -CH=CH-, or a single bond;

express

,

,

or

; m represents 0, 1 or 2; and when m represents 2, the two

Can be the same or different; n represents 0 or 1.

In the liquid crystal composition of the present invention, preferably, in the compound represented by the aforementioned formula I, R ₁ represents a chain alkyl group having 1 to 10 carbon atoms; and R ₂ represents a chain alkoxy group having 1 to 10 carbon atoms.

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 formulae I-1 to I-31,

The liquid crystal composition of the present invention preferably comprises the compound represented by the aforementioned formula I, and preferably, the compound represented by the aforementioned formula I-9 and/or I-11, and further preferably, the content of the compound represented by the aforementioned formula I-9 and/or I-11 is 3-10%.

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 formulae II-1 to II-12,

Here, R ₃ and R ₄ each independently represent 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.

In the liquid crystal composition of the present invention, preferably, the compound represented by the aforementioned formula II contains one or more compounds represented by formula II-2; further preferably, the content of the compound represented by the aforementioned formula II-2 is 5-20%; further preferably, the content of the compound represented by the aforementioned formula II-2 is 7-15%.

In the liquid crystal composition of the present invention, preferably, the compound represented by the aforementioned formula II contains one or more compounds represented by formula II-3; further preferably, the content of the compound represented by the aforementioned formula II-3 is 5-30%; further preferably, the content of the compound represented by the aforementioned formula II-3 is 8-25%.

In the liquid crystal composition of the present invention, preferably, the compound represented by the aforementioned formula II contains one or more compounds represented by formula II-4; further preferably, the content of the compound represented by the aforementioned formula II-4 is 3-17%; further preferably, the content of the compound represented by the aforementioned formula II-4 is 5-10%.

In the liquid crystal composition of the present invention, preferably, the compound represented by the aforementioned formula II-1 is selected from the group consisting of compounds represented by the following formulae II-1-1 to II-1-9,

In the liquid crystal composition of the present invention, preferably, the compound represented by the aforementioned formula II-2 is selected from the group consisting of compounds represented by the following formulae II-2-1 to II-2-8,

In the liquid crystal composition of the present invention, preferably, the compound represented by the aforementioned formula II-3 is selected from the group consisting of compounds represented by the following formulae II-3-1 to II-3-16,

In the liquid crystal composition of the present invention, preferably, the compound represented by the aforementioned formula II-4 is selected from the group consisting of compounds represented by the following formulae II-4-1 to II-4-16,

In the liquid crystal composition of the present invention, preferably, the compound represented by the aforementioned formula II-5 is selected from the group consisting of compounds represented by the following formulae II-5-1 to II-5-15,

In the liquid crystal composition of the present invention, preferably, the compound represented by the aforementioned formula II-6 is selected from the group consisting of compounds represented by the following formulae II-6-1 to II-6-12,

In the liquid crystal composition of the present invention, preferably, the compound represented by the aforementioned formula II-7 is selected from the group consisting of compounds represented by the following formulae II-7-1 to II-7-8,

In the liquid crystal composition of the present invention, preferably, the compound represented by the aforementioned formula II-8-1 is selected from the group consisting of compounds represented by the following formulae II-8-1 to II-8-6,

In the liquid crystal composition of the present invention, preferably, the compound represented by the aforementioned formula II-9 is selected from the group consisting of compounds represented by formulae II-9-1 to II-9-11,

In the liquid crystal composition of the present invention, preferably, the compound represented by the aforementioned formula II-10 is selected from the group consisting of compounds represented by formulae II-10-1 to II-10-12.

In the liquid crystal composition of the present invention, preferably, the compound represented by the aforementioned formula II-11 is selected from the group consisting of compounds represented by formulae II-11-1 to II-11-7.

In the liquid crystal composition of the present invention, preferably, the compound represented by the aforementioned formula II-12 is selected from the group consisting of compounds represented by formulae II-12-1 to II-12-11,

The liquid crystal composition of the present invention preferably further comprises one or more compounds represented by formula III.

R ₅ and R ₆ each independently represent 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 any -CH ₂ - in R ₅ and R ₆ is optionally substituted by a cyclopropylene group or a cyclopentyl group.

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-6,

In the liquid crystal composition of the present invention, preferably, the compound represented by the aforementioned formula III contains the compound represented by formula III-1 and/or III-2; further preferably, the content of the compound represented by formula III-1 and/or III-2 is 5-20%; further preferably, the content of the compound represented by formula III-1 and/or III-2 is 5-16%.

The liquid crystal composition of the present invention preferably further comprises one or more compounds represented by formula IV.

、

各自獨立地表示

或

。 wherein R ₇ and R ₈ 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;

,

Each independently expresses

or

.

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 formulae IV-1 to IV-3,

Here, R ₇ and R ₈ 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.

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

30%；更進一步優選地，IV-1-6的含量為

37%。 The liquid crystal composition of the present invention preferably comprises the compound represented by the aforementioned formula IV-1, which at least comprises the compound represented by the formula IV-1-6; further preferably, the content of the compound represented by the formula IV-1-6 is

30%; more preferably, the content of IV-1-6 is

37%.

In the liquid crystal composition of the present invention, preferably, the compound represented by the aforementioned formula IV-2 is selected from the group consisting of compounds represented by the following formulae IV-2-1 to IV-2-6,

In the liquid crystal composition of the present invention, preferably, the compound represented by the aforementioned formula IV-3 is selected from the group consisting of compounds represented by the following formulae IV-3-1 to IV-3-6,

5%；進一步優選地，式IV-3-4所示化合物的含量為

7%。 The liquid crystal composition of the present invention preferably comprises the compound represented by the aforementioned formula IV-3, and at least comprises the compound represented by the formula IV-3-4; further preferably, the content of the compound represented by the formula IV-3-4 is

5%; further preferably, the content of the compound represented by formula IV-3-4 is

7%.

The liquid crystal composition of the present invention preferably further comprises one or more compounds represented by formula V.

表示

或

。 wherein R ₉ and R ₁₀ each independently represent 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

or

.

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-2,

Here, R ₉ and R ₁₀ each independently represent 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.

In the liquid crystal composition of the present invention, preferably, the compound represented by the aforementioned formula V-1 is selected from the group consisting of compounds represented by the following formulae V-1-1 to V-1-7,

In the liquid crystal composition of the present invention, preferably, the compound represented by the aforementioned formula V-2 is selected from the group consisting of compounds represented by the following formulae V-2-1 to V-2-10,

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

wherein R ₁₁ and R ₁₂ each independently represent an alkyl group having 1-10 carbon atoms, an alkenyl group having 2-10 carbon atoms or an alkoxy group having 1-10 carbon atoms, and any -CH ₂ - in R ₁₁ and R ₁₂ is optionally substituted by a cyclopropylene group or a cyclopentyl group; and X represents O or -CH ₂ O-.

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 formulae VI-1 to VI-2,

wherein R ₁₁ and R ₁₂ each independently represent 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 any -CH ₂ - in R ₁₁ and R ₁₂ is optionally substituted by a cyclopropylene group or a cyclopentyl group.

In the liquid crystal composition of the present invention, preferably, the compound represented by the aforementioned formula VI contains one or more compounds represented by formula VI-2; further preferably, the content of the compound represented by formula VI-2 is 2-17%; further preferably, the content of the compound represented by formula VI-2 is 5-13%.

In the liquid crystal composition of the present invention, preferably, the compound represented by the aforementioned formula VI-1 is selected from the group consisting of compounds represented by the following formulae VI-1-1 to VI-1-6,

The liquid crystal composition of the present invention is preferably such that the compound represented by formula VI-2 in the liquid crystal composition is selected from the group consisting of compounds represented by formulae VI-2-1 to VI-2-8 below.

The liquid crystal composition of the present invention preferably further comprises one or more compounds represented by formula VII.

Here, R ₁₃ and R ₁₄ each independently represent 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.

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-19,

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

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,

The liquid crystal composition of the present invention preferably comprises the aforementioned polymerizable compound comprising the compound represented by formula RM-1. Further preferably, the content of RM-1 is added based on 100% of the total content of the liquid crystal composition, and the added amount is 0.01-0.5%.

The liquid crystal composition of the present invention may preferably contain various functional dopants added to the aforementioned liquid crystal compound.

In the liquid crystal composition of the present invention, preferably, the aforementioned doping agent is mainly an antioxidant, an ultraviolet absorber, a chiral agent, etc.

其中，t表示1-10的整數。 Antioxidants include:

Here, t represents an integer from 1 to 10.

UV absorbers include:

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

In the liquid crystal composition of the present invention, the mass percentage content of the aforementioned dopant is preferably between 0.01-1%.

[Liquid crystal display element or liquid crystal display]

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

The aforementioned active matrix display element or display can be specifically listed, for example, IPS-TFT or FFS-TFT or VA-TFT liquid crystal display element or other TFT display, especially IPS-TFT mode liquid crystal display element or liquid crystal display.

The liquid crystal display element or liquid crystal display of the present invention includes the liquid crystal composition disclosed in the present invention and can be applied to fields such as television.

Implementation example

In order to explain the present invention more clearly, the present invention is further described below in combination with preferred embodiments. Those skilled in the art should understand that the content described below is illustrative rather than restrictive, and should not be used to limit the scope of protection of the present invention.

In the present invention, the preparation methods are conventional methods unless otherwise specified, the raw materials used can be obtained from public commercial channels unless otherwise specified, the percentages are all quality percentages, the temperature is degrees Celsius (℃), and the specific meanings and test conditions of other symbols are as follows: Tni represents the clearing point of liquid crystal (℃), DSC quantitative method test; △n represents optical anisotropy, △n= _ne - _no , where _no is the refractive index of ordinary light, _ne is the refractive index of extraordinary light, the test conditions are 25±2℃ and 60±2℃, 589nm, Abbe refractometer test; △ε represents dielectric anisotropy, △ε= _ε∥ - _ε⊥ , where _ε∥ is the dielectric constant parallel to the molecular axis, ε _⊥ is the dielectric constant perpendicular to the molecular axis, and the test conditions are 25±0.5℃, 20μm antiparallel box, INSTEC: ALCT-IR1 test; γ ₁ is the rotational viscosity (mPa.s), and the test conditions are 25±0.5℃, 20μm vertical box, INSTEC: ALCT-IR1 test; K ₁₁ is the splay elastic constant, K ₃₃ is the bending elastic constant, and the test conditions are: 25℃, INSTEC: ALCT-IR1, 20μm antiparallel box; VHR is the voltage holding rate (%), and the test conditions are 60±2℃, voltage of ±5V, pulse width of 10ms, and voltage holding time of 16.7ms. The test equipment is TOYO Model 6254 liquid crystal performance comprehensive tester; low temperature observation conditions: take 1g of liquid crystal and pour it into a 5ml clean glass vial, seal it and put it into a -30℃ and -40℃ low temperature refrigerator, observe it for 960 hours, and observe whether there is crystal precipitation every 24 hours; residual image: the residual image of the liquid crystal display device is to display the specified fixed pattern in the display area for 1000 hours, and then visually evaluate the residual level of the inherent pattern when the full screen is evenly displayed, and make the following 4-level evaluation:

◎No residue left

○There is a very small amount of residue, which is an acceptable level

△There are residues, which is an unacceptable level

×There are some residues, quite bad.

The preparation method of the liquid crystal composition is as follows: weigh each liquid crystal monomer according to a certain ratio and put it into a stainless steel beaker, place the stainless steel beaker containing each liquid crystal monomer on a magnetic stirrer to heat and melt, and after most of the liquid crystal monomers in the stainless steel beaker are melted, add a magnetic rotor to the stainless steel beaker, stir the mixture evenly, and cool it to room temperature to obtain the liquid crystal composition.

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.

For example:

，其代碼為CCWY-3-O2；

，其代碼為CC-Cp-V1；

，其代碼為CPY-2-O2；

，其代碼為CCY-3-O2；

，其代碼為LY-3-O2；

，其代碼為PGY-3-O2；

，其代碼為Sb-CpO-O4；

，其代碼為Sc-CpO-O4；

，其代碼為PGP-Cpr1-2；

，其代碼為B-2O-O4；

，其代碼為B-CpO-O4；

，其代碼為CY-3-O2；

，其代碼為PP-1-2V；

，其代碼為PGP-5-2；

，其代碼為CPU-3-O2；

，其代碼為CPU-5-O3；

，其代碼為CPU-3-F。

, its code is CCWY-3-O2;

, its code is CC-Cp-V1;

, its code is CPY-2-O2;

, its code is CCY-3-O2;

, its code is LY-3-O2;

, its code is PGY-3-O2;

, its code is Sb-CpO-O4;

, whose code is Sc-CpO-O4;

, whose code is PGP-Cpr1-2;

, whose code is B-2O-O4;

, its code is B-CpO-O4;

, its code is CY-3-O2;

, its code is PP-1-2V;

, whose code is PGP-5-2;

, its code is CPU-3-O2;

, its code is CPU-5-O3;

, its code is CPU-3-F.

The present invention is described below using the following specific embodiments:

Implementation example

Example 1

The formula of the liquid crystal composition and its corresponding properties are shown in Table 3 below.

Comparative Example 1

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

Example 2

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

Comparative Example 2

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

Example 3

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

Example 4

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

Example 5

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

Example 6

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

Example 7

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

Example 8

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

Example 9

The formula of the liquid crystal composition and its corresponding properties are shown in Table 13 below.

Example 10

The formula of the liquid crystal composition and its corresponding properties are shown in Table 14 below.

The following comparative example is made based on Example 10. This example and the comparative example are only used to illustrate the inventive situation and do not constitute a limitation on the present invention. Other examples can be replaced by corresponding comparative examples based on the comparative example of the present invention to achieve corresponding technical effects.

Comparative Example 3

The formula of the liquid crystal composition and its corresponding properties are shown in Table 15 below.

Comparative Example 4

The formula of the liquid crystal composition and its corresponding properties are shown in Table 16 below.

Comparative Example 5

The formula of the liquid crystal composition and its corresponding properties are shown in Table 17 below.

Comparative Example 6

The formula of the liquid crystal composition and its corresponding properties are shown in Table 18 below.

Example 11

The formula of the liquid crystal composition and its corresponding properties are shown in Table 19 below.

Comparative Example 7

The formula of the liquid crystal composition and its corresponding properties are shown in Table 20 below.

UV aging experiments and backlight aging experiments were conducted on Examples 1-10 and Comparative Examples 1-7. In the production process of liquid crystal panels, there is a UV curing process, and ultraviolet light has a destructive effect on liquid crystal materials. Therefore, liquid crystal materials should have a certain ability to resist ultraviolet light and long-term light exposure.

Before conducting the UV and backlight aging experiments, measure the VHR data of the liquid crystal composition as the initial VHR data. Then, conduct UV and backlight aging tests on the liquid crystal composition. After the experiment, measure the VHR data of the liquid crystal composition again. The smaller the data change after the experiment, the stronger the anti-ultraviolet and backlight aging capabilities of the liquid crystal composition.

UV aging experiment: Pour the liquid crystal composition into the test box and irradiate it with 5000mJ energy under a UV lamp with a wavelength of 365nm.

Backlight aging experiment: Pour the liquid crystal composition into the test box and place it on the backlight panel for 1000 hours. The backlight intensity is 15000nit.

Afterimage experiment: Expose to the backlight panel for 1000 hours.

It can be seen from Table 21 above that compared with the comparative example, the embodiment still has a relatively high VHR after UV aging and backlight aging experiments, and does not have residual image defects after long-term backlight irradiation.

Therefore, the technical solution provided by the present invention has a suitable upper and lower limit range of working temperature, suitable dielectric anisotropy, especially large optical anisotropy, good mutual solubility, especially very good low temperature stability at -30℃ and -40℃, and excellent backlight aging performance; it can be used to develop liquid crystal displays with faster response speed, especially to improve the afterimage phenomenon; the liquid crystal composition of the present invention is particularly suitable for 3D display technology.

Obviously, the above embodiments of the present invention are only examples for clearly explaining the present invention, and are not intended to limit the implementation 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 scope of protection of the present invention.

Claims (8)

A liquid crystal composition comprising compounds represented by formula I-9 and/or I-11, wherein the content of the compounds represented by formula I-9 and/or I-11 is 3-10%, and one or more compounds represented by formula II, wherein the compounds represented by formula II comprise 5-20% of the compound represented by formula II-2, 5-30% of the compound represented by formula II-3, and 3-17% of the compound represented by formula II-4, Ⅰ-9 Ⅰ-11 Ⅱ Ⅱ-2 Ⅱ-3 II-4 wherein R ₃ and R ₄ each independently represent 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; Z ₁ represents -CH ₂ O-, -CH=CH- or a single bond; express , , or ; m represents 0, 1 or 2; and when m represents 2, the two can be the same or different; n represents 0 or 1. The liquid crystal composition as described in claim 1, wherein the compound represented by formula II is selected from the group consisting of compounds represented by formulas II-1, II-5 to II-10 below, Ⅱ-1 Ⅱ-5 Ⅱ-6 Ⅱ-7 Ⅱ-8 Ⅱ-9 II-10 wherein R ₃ and R ₄ each independently represent a chain alkyl group having 1 to 10 carbon atoms, an alkenyl group having 2 to 10 carbon atoms or a chain alkoxy group having 1 to 10 carbon atoms. The liquid crystal composition of any one of claims 1-2, wherein the liquid crystal composition further comprises one or more compounds of formula III, III wherein R ₅ and R ₆ each independently represent 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 the -CH ₂ - in either R ₅ or R ₆ is optionally substituted by a cyclopropylene group or a cyclopentyl group. The liquid crystal composition as described in claim 3, wherein the liquid crystal composition further comprises one or more compounds represented by formula IV, IV wherein R ₇ and R ₈ 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; , Each independently expresses or . The liquid crystal composition as claimed in claim 4, wherein the liquid crystal composition further comprises one or more compounds represented by formula V, V wherein R ₉ and R ₁₀ each independently represent 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 or . The liquid crystal composition as claimed in claim 5, wherein the liquid crystal composition further comprises one or more compounds represented by formula VI, VI wherein R ₁₁ and R ₁₂ each independently represent an alkyl group having 1-10 carbon atoms, an alkenyl group having 2-10 carbon atoms or an alkoxy group having 1-10 carbon atoms, and any -CH ₂ - in R ₁₁ and R ₁₂ is optionally substituted by cyclopropylene or cyclopentyl; and X represents O or -CH ₂ O-. The liquid crystal composition as claimed in claim 6, wherein the liquid crystal composition further comprises one or more compounds represented by formula VII, VII wherein R ₁₃ and R ₁₄ each independently represent a chain alkyl group having 1 to 10 carbon atoms, an alkenyl group having 2 to 10 carbon atoms or a chain alkoxy group having 1 to 10 carbon atoms. A liquid crystal display element or a liquid crystal display comprises the liquid crystal composition of any one of claims 1-7, wherein the liquid crystal display element is an active matrix display element or a passive matrix display element.