TWI617651B - Dielectric positive liquid crystal composition - Google Patents

Abstract

The invention discloses a dielectric positive liquid crystal composition. The liquid crystal composition includes one or more components A composed of a liquid crystal compound represented by the general formula I, and one or more components composed of a liquid crystal compound represented by the general formula II. B, including component C composed of one or more liquid crystal compounds represented by general formula III, and further including one or more additive component D composed of compounds represented by general formula S-1. The present invention is exposed to high temperature and ultraviolet light radiation. Under the circumstances, it does not change itself, thereby improving the quality of liquid crystals. It is suitable for active matrix electro-optical elements and liquid crystal displays. It can be used in civilian and practical TFT-LCDs under harsh conditions. I, Ⅱ, III, S-1.

Description

Dielectric positive liquid crystal composition

The invention relates to the field of liquid crystal materials, in particular to a dielectric positive liquid crystal composition.

The liquid crystal display element is divided into the following modes according to the display mode: twisted nematic (TN) mode, super twisted nematic (STN) mode, coplanar mode (IPS), and vertical alignment (VA) mode. Regardless of the display mode, the liquid crystal composition is required to have the following characteristics:

(1) Chemical and physical properties are stable;

(2) Low viscosity;

(3) Have appropriate Δε;

(4) Appropriate ejection rate △ n;

(5) Good compatibility with other liquid crystal compounds.

With the maturity of TFT technology in the early 1990s, color liquid crystal flat panel displays developed rapidly. In less than 10 years, TFT-LCDs have rapidly grown into mainstream displays, which is inseparable from its advantages. Its advantages are mainly divided into 5 points:

First, the use characteristics are good. Low voltage applications, low driving voltage; flat, thin and light, saving a lot of raw materials and use space; low power consumption; display quality from the simplest monochrome character graphics to high resolution, high color fidelity, high brightness, High-contrast, high-response video monitors of various specifications; its display modes include direct-view type, projection type, perspective type and reflective type.

Second, environmental protection characteristics are good. TFT-LCD has no radiation, no flicker, and has no harm to users' health. Especially the emergence of TFT-LCD electronic books and periodicals will bring humans into the era of paperless office and paperless printing, which will trigger humanity to learn, spread and record civilization. Revolution.

3. Wide application range: It can be used normally in the temperature range from -20 ℃ to 50 ℃. The low-temperature operating temperature of TFT-LCD after temperature strengthening can reach minus 80 ℃. It can be used as a mobile terminal display, a desktop terminal display, or a large screen projection TV. It is a full-size video display terminal with excellent performance.

Fourth, the degree of automation of manufacturing technology is high.

5. TFT-LCD is easy to integrate and upgrade.

From the main characteristics of the above-mentioned liquid crystal flat panel displays, higher requirements are also placed on the quality characteristics of liquid crystal materials used in liquid crystal flat panel displays. The liquid crystal composition itself should have high charge retention, high resistivity, low ion concentration, and low Power consumption, low rotational viscosity.

As a liquid crystal material, it is necessary to have good chemical and thermal stability and stability to electric fields and electromagnetic radiation. As a liquid crystal material for thin-film transistor technology (TFT-LCD), in addition to the above stability, it should also have a wide nematic temperature range, suitable birefringence anisotropy, very high resistivity, Good UV resistance, high charge retention and low vapor pressure.

Regarding the application field of thin film transistor technology (TFT-LCD), although the market has been very large in recent years, the technology has gradually matured. At the same time, due to the continuous progress of liquid crystal material technology, people's requirements for display technology have also been continuously improved. Especially in terms of achieving fast response and reducing driving voltage to reduce power consumption.

Liquid crystal materials, as one of the important optoelectronic materials for liquid crystal displays, play an important role in improving the performance of liquid crystal displays. Any liquid crystal composition for display requires a wider liquid crystal temperature, higher stability, more suitable viscosity, and a faster response speed to an electric field. But so far, no single liquid crystal material has been used alone in a liquid crystal display, and the performance requirements can be met without developing a composition with other performance characteristics. Therefore, the continuous development of new liquid crystal materials with excellent performance is of great significance to the development of liquid crystal displays. During the use of liquid crystal, it will be continuously affected by light radiation and heat radiation. At the same time, it will inevitably be exposed to light and heat during the manufacturing process. Such contact will cause changes in the liquid crystal molecules in terms of impurities, which will affect The change in the anchoring ability of the liquid crystal further affects the display effect of the panel. Although the panel technology is advancing by leaps and bounds, OLED has outstanding advantages in this respect over LCD. Corresponding solutions have been shown through experiments that by improving their reliability, the liquid crystal material can be prevented from being adversely affected when exposed to different wavelength bands and high temperatures.

The technical problem to be solved by the present invention is to provide a dielectric positive liquid crystal composition, which does not change itself under the condition of high temperature and ultraviolet radiation, thereby improving the quality of liquid crystal, and is suitable for active matrix electro-optical elements and liquid crystal displays. , Can be used for civilian and practical TFT-LCD under severe conditions.

To solve the above technical problems, the technical solutions adopted by the present invention are:

A dielectric positive liquid crystal composition, the liquid crystal composition includes one or more component A composed of a liquid crystal compound represented by the general formula I, and one or more component B composed of a liquid crystal compound represented by the general formula II, Component C comprising one or more liquid crystal compounds represented by Formula III, and additive component D consisting of one or more compounds represented by Formula S-1, I, Ⅱ, III, S-1,

among them,

Cyclealkyl is selected from any of cyclopentyl, cyclobutyl, and cyclopropyl.

R _{1 is} selected from any one of the following groups ①, ②, ③, and ④.

①H, Cl, F, CN, OCN, OCF ₃ , CF ₃ , CHF ₂ , CH ₂ F, OCHF ₂ , SCN, NCS, SF ₅ .

②A straight-chain alkyl group having 1 to 15 carbon atoms, a straight-chain alkoxy group having 1 to 15 carbon atoms, a straight-chain alkenyl group having 2 to 15 carbon atoms, or a straight-chain alkenyl group having 2 to 15 carbon atoms Alkenyloxy.

③ One or more of -CH ₂ -in the above ② may be independently independently -CH = CH-, -C≡C-, -COO-, -OOC-, cyclobutane, cyclopentane, -O- or -S- is a group formed by substitution and after substitution in which the oxygen atoms are not directly connected.

④ At least one of the groups in which one or more H in the above-mentioned ② are each independently substituted by F and Cl.

R _{2 is} selected from H, a linear alkyl group having 1 to 10 carbon atoms, a linear alkoxy group having 1 to 10 carbon atoms, a linear alkenyl group having 2 to 10 carbon atoms, or a carbon atom having 3 to 10 carbon atoms. 8 linear alkenyloxy, in which any H may be substituted by F.

R _{3 is} selected from , , Any of a linear alkyl group having 1 to 10 carbon atoms, a linear alkoxy group having 1 to 10 carbon atoms, or a linear alkenyl group having 2 to 10 carbon atoms.

X ₁ , X ₂ , X ₃ , and X ₄ are each selected from H and F.

Y _{1 is} selected from F, a linear alkyl group having 1 to 6 carbon atoms, a linear alkoxy group, or a linear alkenyl group having 2 to 6 carbon atoms, wherein H is unsubstituted or Substituted by F or substituted by F.

Z _1, Z ₂ are independently selected from a single _{bond, -CH 2 -, - CH 2} -CH 2 -, - (CH 2) 3 -, - (CH 2) 4 -, - CH = CH -, - C≡C -, -COO-, -OOC-, -CF ₂ O-, -OCH _2- , -CH ₂ O-, -OCF _2- , -CF ₂ CH _2- , -CH ₂ CF _2- , -C ₂ F ₄ -or -CF = CF-.

Z ₃ is selected from a single _{bond, -CH 2 -, - CH 2} -CH 2 -, - (CH 2) 3 -, - (CH 2) 4 -, - CH = CH -, - C≡C -, - COO -, - OOC -, - OCH 2 -, - CH 2 O -, - any one CF- or _{-CF = - CF 2 CH 2 -} , - CH 2 CF 2 -, - C 2 F 4.

, , , Selected from single bond, , , , , , , , , , , , , Any one of the groups.

Any one selected from the following groups (a) and (b);

(A) trans-1,4-cyclohexylene, 1,4-cyclohexylene group, wherein one or more non-adjacent -CH ₂ - group is a substituted or unsubstituted -O- or -S- To replace.

(B) a 1,4-phenylene group in which one or two -CH- are substituted or unsubstituted by N, and one or two H are substituted or unsubstituted by F.

n represents 3, 4, 5, 6, 9, and 10.

a, b represent 0, 1, 2, 3, c represents 1 or 2, d represents 0, 1, 2, and a + b + c≤5.

The technical solution of the present invention is further improved in that: in the liquid crystal composition, the weight percentage content of component A is 1 to 50%, the weight percentage content of component B is 1 to 60%, and the weight percentage of component C is 100%. The content is 1 ~ 50%.

Preferably, in the liquid crystal composition, the weight percentage content of component A is 5 to 50%, the weight percentage content of component B is 10 to 60%, and the weight percentage content of component C is 5 to 50%. 50%.

Further preferably, in the liquid crystal composition, the weight percentage content of component A is 15 to 45%, the weight percentage content of component B is 20 to 60%, and the weight percentage content of component C is 15 ~ 35%.

The technical solution of the present invention is further improved in that the content of the additive component D in the liquid crystal composition is 100-3000 ppm.

Preferably, the content of the additive component D in the liquid crystal composition is 100-1000 ppm.

Further preferably, the content of component D in the liquid crystal composition is 100-500 ppm.

The best is 100 ~ 300ppm.

The technical scheme of the present invention is further improved in that the compound represented by the general formula I is specifically a compound represented by the following formula I-1 to formula I-3,

I-1,

I-2,

I-3,

among them,

R _{1 is} selected from any one of the following groups ①, ②, ③, and ④,

①H, Cl, F, CN, OCN, OCF 3, CF 3, CHF 2, CH 2 F, OCHF 2, SCN, NCS, SF 5,

②A straight-chain alkyl group having 1 to 15 carbon atoms, a straight-chain alkoxy group having 1 to 15 carbon atoms, a straight-chain alkenyl group having 2 to 15 carbon atoms, or a straight-chain alkenyl group having 2 to 15 carbon atoms Alkenyloxy,

③ One or more of -CH ₂ -in the above ② may be independently independently -CH = CH-, -C≡C-, -COO-, -OOC-, cyclobutane, cyclopentane, -O- or -S- is a group formed by substitution and in a form where the oxygen atoms are not directly connected after substitution,

④ At least one of the groups in which one or more H in the above-mentioned ② are each independently substituted by F and Cl.

X ₁ and X ₂ are each selected from H and F.

Z _1, Z ₂ are independently selected from a single _{bond, -CH 2 -, - CH 2} -CH 2 -, - (CH 2) 3 -, - (CH 2) 4 -, - CH = CH -, - C≡C -, -COO-, -OOC-, -CF ₂ O-, -OCH _2- , -CH ₂ O-, -OCF _2- , -CF ₂ CH _2- , -CH ₂ CF _2- , -C ₂ F ₄ -or -CF = CF-.

, , Selected from single bond, , , , , , , , , Any one of the groups.

n represents 3, 4, 5, 6, 9, and 10.

a, b respectively represent 0, 1, 2, 3, c represents 1 or 2, and a + b + c≤5.

The technical scheme of the present invention is further improved in that the compound represented by the general formula I is specifically a compound represented by the following formula I-1-a to formula I-3-t, I-1-a, I-1-b, I-1-c, I-1-d, I-1-e, I-1-f, I-1-g, I-1-h, I -1-i, I-1-j, I-1-k, I-1-l, I-1-m, I-1-n, I-1-o, I-1-p, I-1-q, I-1-r, I-1-s, I-1-t, I-2-a, I-2-b, I-2-c, I-2-d, I-2-e, I-2-f, I-2-g, I-2-h, I-2-i, I-2-j, I-2-k, I-2-l, I-2-m, I-2-n, I-2-o, I-2-p, I-2-q, I-2-r, I-2-s, I-2-t, I-3-a, I-3-b, I-3-c, I-3-d, I-3-e, I-3-f, I-3-g, I-3-h, I-3-i, I-3-j, I-3-k, I-3-l, I-3-m, I-3-n, I-3-o, I-3-p, I-3-q, I-3-r, I-3-s, I-3-t,

among them,

R _{1 is} selected from any one of the following groups ①, ②, ③, and ④.

①H, Cl, F, CN, OCN, OCF ₃ , CF ₃ , CHF ₂ , CH ₂ F, OCHF ₂ , SCN, NCS, SF ₅ .

②A straight-chain alkyl group having 1 to 15 carbon atoms, a straight-chain alkoxy group having 1 to 15 carbon atoms, a straight-chain alkenyl group having 2 to 15 carbon atoms, or a straight-chain alkenyl group having 2 to 15 carbon atoms Alkenyloxy.

③ One or more of -CH ₂ -in the above ② may be independently independently -CH = CH-, -C≡C-, -COO-, -OOC-, cyclobutane, cyclopentane, -O- or -S- is a group formed by substitution and after substitution in which the oxygen atoms are not directly connected.

④ at least one of the groups in which one or more H in the above ② are each independently substituted by F and Cl;

(F) represents either H or F;

(O) represents either O or -CH _2- .

Preferably, the compound represented by the general formula I is specifically a compound represented by the following formula I-1-a-1 ~ I-3-t-6 I-1-a-1, I-1-a-2, I-1-a-3, I-1-a-4, I-1-a-5, I-1-b-1, I-1-b-2, I-1-b-3, I-1-c-1, I-1-c-2, I-1-c-3, I-1-d-1, I-1-d-2, I-1-d-3, I-1-d-4, I-1-d-5, I-1-d-6, I-1-d-7, I-1-e-1, I-1-e-2, I-1-e-3, I-1-f-1, I-1-g-1, I-1-h-1, I-1-h-2, I-1-h-3, I-1-h-4, I-1-i-1, I-1-i-2, I-1-i-3, I-1-j-1, I-1-k-1, I-1-k-2, I-1-l-1, I-1-l-2, I-1-m-1, I-1-n-1, I-1-n-2, I-1-o-1, I-1-o-2, I-1-o-3, I-1-p-1, I-1-p-2, I-1-p-3, I-1-q-1, I-1-q-2, I-1-q-3, I-1-r-1, I-1-r-2, I-1-r-3, I-1-s-1, I-1s-2, I-1-s-3, I-1-t-1, I-1-t-2, I-1-t-3, I-2-a-1, I-2-a-2, I-2-a-3, I-2-a-4, I-2-a-5, I-2-b-1, I-2-b-2, I-2-b-3, I-2-b-4, I-2-b-5, I-2-b-6, I-2-c-1, I-2-c-2, I-2-c-3, I-2-d-1, I-2-d-2, I-2-d-3, I-2-d-4, I-2-d-5, I-2-d-6, I-2-d-7, I-2-e-1, I-2-e-2, I-2-e-3, I-2-f-1, I-2-g-1, I-2-h-1, I-2-h-2, I-2-h-3, I-2-h-4, I-2-i-1, I-2-i-2, I-2-i-3, I-2-j-1, I-2-k-1, I-2-k-2, I-2-l-1, I-2-l-2, I-2-m-1, I-2-n-1, I-2-n-2, I-2-o-1, I-2-o-2, I-2-o-3, I-2-p-1, I-2-p-2, I-2-p-3, I-2-q-1, I-2-q-2, I-2-q-3, I-2-r-1, I-2-r-2, I-2-r-3, I-2-s-1, I-2-s-2, I-2-s-3, I-2-t-1, I-2-t-2, I-2-t-3, I-3-a-1, I-3-a-2, I-3-a-3, I-3-a-4, I-3-a-5, I-3-b-1, I-3-b-2, I-3-b-3, I-3-b-4, I-3-b-5, I-3-b-6, I-3-c-1, I-3-c-2, I-3-c-3, I-3-d-1, I-3-d-2, I-3-d-3, I-3-d-4, I-3-d-5, I-3-d-6, I-3-d-7, I-3-e-1, I-3-e-2, I-3-e-3, I-3-f-1, I-3-g-1, I-3-h-1, I-3-h-2, I-3-h-3, I-3-h-4, I-3-i-1, I-3-i-2, I-3-i-3, I-3-j-1, I-3-k-1, I-3-k-2, I-3-l-1, I-3-l-2, I-3-m-1, I-3-n-1, I-3-n-2, I-3-o-1, I-3-o-2, I-3-o-3, I-3-p-1, I-3-p-2, I-3-p-3, I-3-q-1, I-3-q-2, I-3-q-3, I-3-r-1, I-3-r-2, I-3-r-3, I-3-s-1, I-3-s-2, I-3-s-3, I-3-t-1, I-3-t-2, I-3-t-3.

The technical scheme of the present invention is further improved in that the compound represented by the general formula III is specifically a compound represented by the following formula III-a to formula III-u, (Ⅲ-a), (Ⅲ-b), (Ⅲ-c), (Ⅲ-d), (Ⅲ-e), (Ⅲ-f), (Ⅲ-g), (Ⅲ-h), (Ⅲ-i), (Ⅲ-j), (Ⅲ-k), (Ⅲ-l), (Ⅲ-m), (Ⅲ-n), (Ⅲ-o), (Ⅲ-p), (Ⅲ-q), (Ⅲ-r), (Ⅲ-s), (Ⅲ-t), (Ⅲ-u),

among them,

R _{3 is} selected from , , Any one of a linear alkyl group having 1 to 10 carbon atoms, a linear alkoxy group having 1 to 10 carbon atoms or a linear alkenyl group having 2 to 10 carbon atoms;

Y _{1 is} selected from F, a linear alkyl group having 1 to 6 carbon atoms, a linear alkoxy group, or a linear alkenyl group having 2 to 6 carbon atoms, wherein H is unsubstituted or Replaced by F alone or by F;

(F) represents either H or F.

Preferably, the compound represented by the general formula III is specifically a compound represented by the following formula III-a-1 to formula III-m-1, Ⅲ-a-1, Ⅲ-a-2, Ⅲ-b-1, Ⅲ-c-1, Ⅲ-d-1, Ⅲ-e-1, Ⅲ-f-1, Ⅲ-g-1, Ⅲ-m-1,

among them,

R _{3 is} selected from , , Any of a linear alkyl group having 1 to 10 carbon atoms, a linear alkoxy group having 1 to 10 carbon atoms, or a linear alkenyl group having 2 to 10 carbon atoms.

The invention also discloses that the above-mentioned dielectric positive liquid crystal composition is applied to a liquid crystal display element and a liquid crystal display.

Due to the adoption of the above technical solution, the technical progress achieved by the present invention is:

The dielectric positive liquid crystal composition of the present invention has the characteristics of high charge retention, low power consumption, low rotational viscosity, and fast response time, and is suitable for active matrix electro-optical elements and liquid crystal displays, and especially twisted nematic ( TN), in-plane switching (IPS), or fringe field switching (FFS) type displays.

The dielectric positive liquid crystal composition provided by the present invention has excellent performance, can meet high reliability requirements, and has anti-oxidation stability, anti-ultraviolet stability, and high and low temperature stability. It also has a very low total response time, with lower voltage, high resistivity and voltage retention. By adjusting the content of each component, the nematic liquid crystal composition of the present invention can have different threshold voltages and birefringence characteristics, and can be made into various systems commonly used by customers, which is convenient for different liquid crystal cell thicknesses and different Use under driving voltage. And the liquid crystal mixture can still show a high resistivity after high temperature, and the liquid crystal mixture shows excellent high temperature and UV stability performance. At the same time, the liquid crystal mixture in the present invention also exhibits low viscosity, fast response time, appropriate optical anisotropy, and appropriate dielectric anisotropy, so it can have an optoelectronic display with active matrix addressing.

The dielectric positive liquid crystal composition of the present invention can be used in an active matrix display, preferably by a thin film transistor (TFT) matrix addressing, and is particularly suitable for manufacturing a fast response active matrix TN-TFT, IPS-TFT liquid crystal display. Elements and liquid crystal displays also fall within the protection scope of the present invention.

The invention discloses a dielectric positive liquid crystal composition, which is characterized in that: the liquid crystal composition includes one or more component A composed of a liquid crystal compound represented by the general formula I, and one or more components represented by the general formula II Component B composed of a liquid crystal compound includes component C composed of one or more liquid crystal compounds represented by the general formula III, and also includes additive component D composed of one or more compounds represented by the general formula S-1, I, Ⅱ, III, S-1,

among them,

Cyclealkyl is selected from any one of cyclopentyl, cyclobutyl, cyclopropyl,

R _{1 is} selected from any one of the following groups ①, ②, ③, and ④,

①H, Cl, F, CN, OCN, OCF 3, CF 3, CHF 2, CH 2 F, OCHF 2, SCN, NCS, SF 5,

②A straight-chain alkyl group having 1 to 15 carbon atoms, a straight-chain alkoxy group having 1 to 15 carbon atoms, a straight-chain alkenyl group having 2 to 15 carbon atoms, or a straight-chain alkenyl group having 2 to 15 carbon atoms Alkenyloxy,

③ One or more of -CH ₂ -in the above ② may be independently independently -CH = CH-, -C≡C-, -COO-, -OOC-, cyclobutane, cyclopentane, -O- or -S- is a group formed by substitution and in a form where the oxygen atoms are not directly connected after substitution,

④ at least one of the groups in which one or more H in the above ② are each independently substituted by F and Cl;

R _{2 is} selected from H, a linear alkyl group having 1 to 10 carbon atoms, a linear alkoxy group having 1 to 10 carbon atoms, a linear alkenyl group having 2 to 10 carbon atoms, or a carbon atom having 3 to 10 carbon atoms. 8 straight-chain alkenyloxy, in which any H may be substituted by F;

R _{3 is} selected from , , Any one of a linear alkyl group having 1 to 10 carbon atoms, a linear alkoxy group having 1 to 10 carbon atoms or a linear alkenyl group having 2 to 10 carbon atoms;

X ₁ , X ₂ , X ₃ , and X ₄ are each selected from any one of H and F;

Y _{1 is} selected from F, a linear alkyl group having 1 to 6 carbon atoms, a linear alkoxy group, or a linear alkenyl group having 2 to 6 carbon atoms, wherein H is unsubstituted or Replaced by F alone or by F;

Z _1, Z ₂ are independently selected from a single _{bond, -CH 2 -, - CH 2} -CH 2 -, - (CH 2) 3 -, - (CH 2) 4 -, - CH = CH -, - C≡C -, -COO-, -OOC-, -CF ₂ O-, -OCH _2- , -CH ₂ O-, -OCF _2- , -CF ₂ CH _2- , -CH ₂ CF _2- , -C ₂ F ₄ -or-CF = CF-;

Z ₃ is selected from a single _{bond, -CH 2 -, - CH 2} -CH 2 -, - (CH 2) 3 -, - (CH 2) 4 -, - CH = CH -, - C≡C -, - COO -, -OOC-, -OCH _2- , -CH ₂ O-, -CF ₂ CH _2- , -CH ₂ CF _2- , -C ₂ F _4- , or -CF = CF-;

, , , Selected from single bond, , , , , , , , , , , , , Any one of the groups;

Selected from any one of the following groups (a) and (b),

(A) a trans 1,4-cyclohexylene, 1,4-cyclohexenyl group in which one or more non-adjacent -CH ₂ -groups are substituted or unsubstituted by -O- or -S- Replace

(B) a 1,4-phenylene group in which one or two -CH- is substituted or unsubstituted by N, and one or two H is substituted or unsubstituted by F;

n represents 3, 4, 5, 6, 9, 10;

a, b represent 0, 1, 2, 3, c represents 1 or 2, d represents 0, 1, 2, and a + b + c≤5.

The invention also discloses that in the liquid crystal composition, the weight percentage content of component A is 1 to 50%, the weight percentage content of component B is 1 to 60%, and the weight percentage content of component C is 1 to 50. %.

The invention also discloses that the content of the component D in the liquid crystal composition is 100-3000 ppm.

The liquid crystal composition of the present invention can be produced by mixing two or more liquid crystal compounds by a general method, such as a method of mixing different components at a high temperature and dissolving each other, wherein the liquid crystal composition is dissolved in a solvent for the compound The mixture is neutralized and mixed, and then the solvent is distilled off under reduced pressure; or the liquid crystal composition of the present invention can be prepared according to a general preparation method.

The specific meanings and test conditions of the symbols in the present invention are as follows:

%: Content by weight;

℃: temperature unit, Celsius;

Cp: indicates the clear point (° C) of the liquid crystal.

S-N: The melting point (° C) of the crystalline state to the nematic of the liquid crystal.

△ n: optical anisotropy, no is the refractive index of ordinary light, ne is the refractive index of extraordinary light, and the test conditions are 589 nm and 25 ° C.

△ ε: dielectric anisotropy, △ ε = ε _∥ -ε _⊥ , where ε _∥ is a dielectric constant parallel to the molecular axis, ε _⊥ is a dielectric constant perpendicular to the molecular axis, and the test conditions are 25 ° C ; 1KHz; HP4284A; 4.0 micron TN left-handed box.

γ ₁ : Rotational viscosity [mPa · s], test condition is 25 ± 0.5 ° C.

ρ: resistivity [Ω · cm], the larger the resistivity value, the better the quality of the liquid crystal composition.

VHR: voltage retention rate [%], which can characterize the quality of the liquid crystal composition and its stability under high temperature and ultraviolet conditions. The larger the value of the voltage retention rate, the better the quality and stability of the liquid crystal composition.

※: It means it doesn't belong to A, B, C and D monomers.

Low temperature storage: The longer the low temperature storage time, the better the miscibility of mixed crystal materials;

The present invention will be further described below with reference to specific embodiments, but the following embodiments are examples of the present invention, and the present invention is not limited to the following embodiments. Without departing from the spirit or scope of the present invention, by adjusting the content of each component in the liquid crystal composition of the present invention, it is possible to modify or improve liquid crystals having different thresholds, clear points, and birefringence characteristics. Mixtures, which will be apparent to those skilled in the art. The methods are general methods unless otherwise specified. The materials are available from publicly available sources unless otherwise specified.

Each of the components used in the following examples can be synthesized by conventional methods, or obtained by commercial means. These synthesis techniques are general, and the obtained liquid crystal compounds have been tested to meet the standards of electronic compounds.

A liquid crystal composition was prepared according to the compounding ratio of each liquid crystal composition specified in the following examples. The preparation of the liquid crystal composition is performed according to a general method in the art, for example, heating, ultrasonic wave, suspension, etc. are used to prepare the liquid crystal composition according to a prescribed ratio.

The liquid crystal composition was prepared by taking the following liquid crystal compounds in the following percentages by weight, and the liquid crystal compositions given in the following examples were prepared and studied. The composition and performance parameter test results of each liquid crystal composition are shown below.

The liquid crystal monomer structure of the embodiment of the present application is represented by a code, and the method for representing the structure of the liquid crystal ring structure, the end group and the linking group is shown in the following table (a) and (b)

Table (1): Corresponding codes of ring structure         <TABLE border = "1" borderColor = "# 000000" width = "85%"> <TBODY> <tr> <td> Ring structure </ td> <td> Corresponding code </ td> </ tr> <tr > <td> <img wi = "81" he = "38" file = "IMG-2 / Draw / 02_image587.jpg" img-format = "jpg"> </ img> </ td> <td> H < / td> </ tr> <tr> <td> <img wi = "81" he = "38" file = "IMG-2 / Draw / 02_image589.jpg" img-format = "jpg"> </ img> </ td> <td> B </ td> </ tr> <tr> <td> <img wi = "81" he = "58" file = "IMG-2 / Draw / 02_image591.jpg" img-format = "jpg"> </ img> </ td> <td> B (3F) </ td> </ tr> <tr> <td> <img wi = "84" he = "61" file = "IMG -2 / Draw / 02_image593.jpg "img-format =" jpg "> </ img> </ td> <td> B (2F, 4F) </ td> </ tr> <tr> <td> <img wi = "84" he = "81" file = "IMG-2 / Draw / 02_image595.jpg" img-format = "jpg"> </ img> </ td> <td> B (3F, 4F, 5F) </ td> </ tr> <tr> <td> <img wi = "84" he = "38" file = "IMG-2 / Draw / 02_image597.jpg" img-format = "jpg"> </ img > </ td> <td> B (4F) </ td> </ tr> <tr> <td> <img wi = "81" he = "79" file = "IMG-2 / Draw / 02_image599.jpg "img-format =" jpg "> </ img> </ td> <td> B (3F, 5F) </ td> </ tr> <tr> <td> <img wi =" 81 "he =" 58 "file =" IMG-2 / Draw / 02_image601.jpg "img-format =" jpg "> </ img> </ td> <td> B (2F) </ td> </ tr> <tr> <td> <img wi = "81" he = "61" file = "IMG-2 / Draw / 02_image603.jpg" img-format = "jpg"> </ img > </ td> <td> B (2F, 3F) </ td> </ tr> <tr> <td> <img wi = "83" he = "43" file = "IMG-2 / Draw / 02_image605 .jpg "img-format =" jpg "> </ img> </ td> <td> H [3O] </ td> </ tr> <tr> <td> <img wi =" 83 "he =" 50 "file =" IMG-2 / Draw / 02_image607.jpg "img-format =" jpg "> </ img> </ td> <td> H [3O, 5O] </ td> </ tr> <tr > <td> <img wi = "139" he = "60" file = "IMG-2 / Draw / 02_image609.jpg" img-format = "jpg"> </ img> </ td> <td> Sa < / td> </ tr> <tr> <td> <img wi = "83" he = "70" file = "IMG-2 / Draw / 02_image611.jpg" img-format = "jpg"> </ img> </ td> <td> HTMP </ td> </ tr> </ TBODY> </ TABLE>

Table (II): Corresponding codes of end groups and linking groups         <TABLE border = "1" borderColor = "# 000000" width = "85%"> <TBODY> <tr> <td> End group and linking group </ td> <td> Corresponding code </ td> </ tr> <tr> <td> C <sub> n </ sub> H <sub> 2n + 1 </ sub>-</ td> <td> n </ td> </ tr> <tr> <td > C <sub> n </ sub> H <sub> 2n + 1 </ sub> O- </ td> <td> nO </ td> </ tr> <tr> <td> -OCF <sub> 3 </ sub> </ td> <td> OCF <sub> 3 </ sub> </ td> </ tr> <tr> <td> -CF <sub> 2 </ sub> O- </ td > <td> CF <sub> 2 </ sub> O </ td> </ tr> <tr> <td> -F </ td> <td> F </ td> </ tr> <tr> < td> -CN </ td> <td> CN </ td> </ tr> <tr> <td> -CH <sub> 2 </ sub> CH <sub> 2 </ sub>-</ td> <td> E </ td> </ tr> <tr> <td> -CH = CH- </ td> <td> V </ td> </ tr> <tr> <td> -C≡C- </ td> <td> W </ td> </ tr> <tr> <td> -COO- </ td> <td> COO </ td> </ tr> <tr> <td> -CH = CH-C <sub> n </ sub> H <sub> 2n + 1 </ sub> </ td> <td> Vn </ td> </ tr> <tr> <td> <img wi = "53 "he =" 36 "file =" IMG-2 / Draw / 02_image613.jpg "img-format =" jpg "> </ img> </ td> <td> H (5) </ td> </ tr> <tr> <td> <img wi = "51" he = "33" file = "IMG-2 / Draw / 02_image615.jpg" img-format = "jpg"> </ img> </ td> <td> H (4) </ td> </ tr> <tr> <td> <img wi = "48" he = "36" file = "IMG-2 / Draw / 02_image617.jpg" img-format = "jpg" > </ img> </ t d> <td> H (3) 1 </ td> </ tr> </ TBODY> </ TABLE>

For example:

H (5) HHV1

3B B (3F) B (3F, 5F) CF2OB (3F, 4F, 5F)

Example 1         <TABLE border = "1" borderColor = "# 000000" width = "85%"> <TBODY> <tr> <td> Category </ td> <td> LCD monomer code </ td> <td> Content ( %) </ Td> </ tr> <tr> <td> Ⅱ </ td> <td> 3HHV </ td> <td> 57 </ td> </ tr> <tr> <td> Ⅲ </ td> <td> 3HHB3 </ td> <td> 6 </ td> </ tr> <tr> <td> Ⅲ </ td> <td> 1BHHV </ td> <td> 7 </ td> < / tr> <tr> <td> ※ </ td> <td> 3HHCOOBH3 </ td> <td> 3 </ td> </ tr> <tr> <td> ※ </ td> <td> 3HHCOOBH4 < / td> <td> 3 </ td> </ tr> <tr> <td> Ⅲ </ td> <td> 3HBB (3F, 4F, 5F) </ td> <td> 3 </ td> < / tr> <tr> <td> Ⅲ </ td> <td> 3HH B (3F, 4F, 5F) </ td> <td> 3 </ td> </ tr> <tr> <td> Ⅰ < / td> <td> H (5) BB (3F, 5F) CF2OB (3F, 4F, 5F) </ td> <td> 8 </ td> </ tr> <tr> <td> ※ </ td > <td> 3HB (3F) BH3 </ td> <td> 5 </ td> </ tr> <tr> <td> ※ </ td> <td> 3HBBH3 </ td> <td> 5 </ td> </ tr> <tr> <td> S-1 </ td> <td> HTMPOOC10COOHTMP </ td> <td> 100ppm </ td> </ tr> <tr> <td> Δε [1KHz, 20 ℃]: 2.4 Δn [589nm, 20 ℃]: 0.079 Cp: 92 ℃ γ <sub> 1 </ sub>: 75.3mPa.s. </ td> </ tr> </ TBODY> </ TABLE>

Example 2         <TABLE border = "1" borderColor = "# 000000" width = "85%"> <TBODY> <tr> <td> Category </ td> <td> LCD monomer code </ td> <td> Content ( %) </ Td> </ tr> <tr> <td> Ⅱ </ td> <td> 3HHV </ td> <td> 28 </ td> </ tr> <tr> <td> Ⅲ </ td> <td> 3HBB (3F, 4F, 5F) </ td> <td> 15 </ td> </ tr> <tr> <td> Ⅲ </ td> <td> 2BB (2F) B3 </ td> <td> 10 </ td> </ tr> <tr> <td> Ⅲ </ td> <td> 3HHBB (3F, 4F) </ td> <td> 4 </ td> </ tr> <tr> <td> Ⅲ </ td> <td> 3HHBB (3F, 4F, 5F) </ td> <td> 4 </ td> </ tr> <tr> <td> Ⅰ </ td> < td> H (5) BB (3F) B (3F, 4F) CF2OB (3F, 4F, 5F) </ td> <td> 8 </ td> </ tr> <tr> <td> Ⅲ </ td > <td> 3HH B (3F, 4F, 5F) </ td> <td> 7 </ td> </ tr> <tr> <td> Ⅲ </ td> <td> 5HH B (3F, 4F, 5F) </ td> <td> 8 </ td> </ tr> <tr> <td> Ⅱ </ td> <td> 2HH3 </ td> <td> 8 </ td> </ tr> < tr> <td> Ⅰ </ td> <td> H (5) H [3O] BB (3F, 5F) CF2OB (3F, 4F, 5F) </ td> <td> 8 </ td> </ tr > <tr> <td> S-1 </ td> <td> HTMPOOC9COOHTMP </ td> <td> 1000ppm </ td> </ tr> <tr> <td> Δε [1KHz, 20 ℃]: 8.3 Δn [589nm, 20 ° C]: 0.115 Cp: 90 ° C γ <sub> 1 </ sub>: 80.6mPa.s. </ td> </ tr> </ TBODY> </ TABLE>

Example 3         <TABLE border = "1" borderColor = "# 000000" width = "85%"> <TBODY> <tr> <td> Category </ td> <td> LCD monomer code </ td> <td> Content ( %) </ Td> </ tr> <tr> <td> Ⅲ </ td> <td> 3HHB (4F) </ td> <td> 3.5 </ td> </ tr> <tr> <td> Ⅲ </ td> <td> 2HHB (4F, 5F) </ td> <td> 3.5 </ td> </ tr> <tr> <td> Ⅲ </ td> <td> 3HHB1 </ td> < td> 5 </ td> </ tr> <tr> <td> Ⅰ </ td> <td> H (5) HBB (3F, 5F) CF2OB (3F, 4F, 5F) </ td> <td> 3.5 </ td> </ tr> <tr> <td> Ⅲ </ td> <td> 1BHHV </ td> <td> 5.5 </ td> </ tr> <tr> <td> Ⅱ </ td > <td> 3HHV </ td> <td> 49 </ td> </ tr> <tr> <td> Ⅰ </ td> <td> H (5) BB (3F, 5F) CF2OB (3F, 4F , 5F) </ td> <td> 14.5 </ td> </ tr> <tr> <td> Ⅰ </ td> <td> H (5) BB (3F) B (3F, 4F) CF2OB (3F , 4F, 5F) </ td> <td> 8 </ td> </ tr> <tr> <td> Ⅲ </ td> <td> H (5) BBB (3F) B (3F, 4F, 5F ) </ td> <td> 2 </ td> </ tr> <tr> <td> Ⅲ </ td> <td> 3BBB (2F, 4F) </ td> <td> 5.5 </ td> < / tr> <tr> <td> S-1 </ td> <td> HTMPOOC6COOHTMP </ td> <td> 1500ppm </ td> </ tr> <tr> <td> Δε [1KHz, 20 ℃]: 7.2 Δn [589nm, 20 ℃]: 0.100 Cp: 71 ℃ γ <sub> 1 </ sub>: 61.5mPa.s. </ td> </ tr> </ TBODY> </ TABLE>

Example 4         <TABLE border = "1" borderColor = "# 000000" width = "85%"> <TBODY> <tr> <td> Category </ td> <td> LCD monomer code </ td> <td> Content ( %) </ Td> </ tr> <tr> <td> Ⅱ </ td> <td> 3HHV </ td> <td> 16.5 </ td> </ tr> <tr> <td> ※ </ td> <td> 3HB (3F) BH3 </ td> <td> 6 </ td> </ tr> <tr> <td> ※ </ td> <td> 3HBBH3 </ td> <td> 4 < / td> </ tr> <tr> <td> Ⅲ </ td> <td> 3HHV1 </ td> <td> 4.5 </ td> </ tr> <tr> <td> Ⅲ </ td> < td> 3HHB (3F) B (3F, 4F, 5F) </ td> <td> 8.25 </ td> </ tr> <tr> <td> Ⅲ </ td> <td> 3HH B (3F, 4F , 5F) </ td> <td> 5.5 </ td> </ tr> <tr> <td> Ⅲ </ td> <td> 3HHBOCF3 </ td> <td> 6 </ td> </ tr> <tr> <td> Ⅲ </ td> <td> 5HHBOCF3 </ td> <td> 4.75 </ td> </ tr> <tr> <td> Ⅲ </ td> <td> 1BHHV </ td> <td> 6.25 </ td> </ tr> <tr> <td> Ⅰ </ td> <td> H (5) BB (3F) B (3F, 4F) CF2OB (3F, 4F, 5F) </ td> <td> 10 </ td> </ tr> <tr> <td> Ⅰ </ td> <td> H (5) BB (3F, 5F) CF2OB (3F, 4F, 5F) </ td> <td> 20 </ td> </ tr> <tr> <td> Ⅰ </ td> <td> H (5) H [3O] BB (3F, 5F) CF2OB (3F, 4F, 5F) </ td> <td> 8 </ td> </ tr> <tr> <td> Ⅲ </ td> <td> H (5) BBB (3F) B (3F, 4F, 5F) </ td> <td > 0.25 </ td> </ tr> <tr> <td> S-1 </ td> <td> HTMPOOC5COOHTMP </ td> <t d> 2000ppm </ td> </ tr> <tr> <td> Δε [1KHz, 20 ℃]: 12.1 Δn [589nm, 20 ℃]: 0.123 Cp: 109.8 ℃ γ <sub> 1 </ sub>: 93.6 mPa.s. </ td> </ tr> </ TBODY> </ TABLE>

Example 5         <TABLE border = "1" borderColor = "# 000000" width = "85%"> <TBODY> <tr> <td> Category </ td> <td> LCD monomer code </ td> <td> Content ( %) </ Td> </ tr> <tr> <td> Ⅱ </ td> <td> 3HHV </ td> <td> 28 </ td> </ tr> <tr> <td> Ⅱ </ td> <td> 3HHV1 </ td> <td> 4 </ td> </ tr> <tr> <td> Ⅰ </ td> <td> H (3) 1BB (3F) B (3F, 5F) CF2OB (3F, 4F, 5F) </ td> <td> 13 </ td> </ tr> <tr> <td> Ⅰ </ td> <td> H (5) H [3O] BB (3F, 5F) CF2OB (3F, 4F, 5F) </ td> <td> 8 </ td> </ tr> <tr> <td> Ⅰ </ td> <td> H (3) 1BB (3F, 5F) CF2OB (3F, 4F, 5F) </ td> <td> 18 </ td> </ tr> <tr> <td> Ⅲ </ td> <td> H (5) BBB (3F) B (3F, 4F, 5F) </ td> <td> 2 </ td> </ tr> <tr> <td> Ⅲ </ td> <td> H (3) 1BB (3F) B2 </ td> <td> 7 </ td> </ tr> <tr> <td> Ⅲ </ td> <td> H (5) HBB (3F) B (3F, 4F, 5F) </ td> <td> 2 </ td > </ tr> <tr> <td> Ⅱ </ td> <td> 2HH3 </ td> <td> 10 </ td> </ tr> <tr> <td> Ⅰ </ td> <td> H (5) HBB (3F, 5F) CF2OB (3F, 4F, 5F) </ td> <td> 8 </ td> </ tr> <tr> <td> S-1 </ td> <td> HTMPOOC3COOHTMP </ td> <td> 3000ppm </ td> </ tr> <tr> <td> Δε [1KHz, 20 ℃]: 11.6 Δn [589nm, 20 ℃]: 0.119 Cp: 68 ℃ γ <sub> 1 </ sub>: 41.5mPa.s. </ td> </ tr> </ TBODY> </ TABLE>

Comparative Example 1         <TABLE border = "1" borderColor = "# 000000" width = "85%"> <TBODY> <tr> <td> Category </ td> <td> LCD monomer code </ td> <td> Content ( %) </ Td> </ tr> <tr> <td> Ⅱ </ td> <td> 3HHV </ td> <td> 57 </ td> </ tr> <tr> <td> Ⅲ </ td> <td> 3HHB3 </ td> <td> 6 </ td> </ tr> <tr> <td> Ⅲ </ td> <td> 1BHHV </ td> <td> 7 </ td> < / tr> <tr> <td> ※ </ td> <td> 3HHCOOBH3 </ td> <td> 3 </ td> </ tr> <tr> <td> ※ </ td> <td> 3HHCOOBH4 < / td> <td> 3 </ td> </ tr> <tr> <td> Ⅲ </ td> <td> 3HBB (3F, 4F, 5F) </ td> <td> 3 </ td> < / tr> <tr> <td> Ⅲ </ td> <td> 3HH B (3F, 4F, 5F) </ td> <td> 3 </ td> </ tr> <tr> <td> Ⅰ < / td> <td> H (5) BB (3F, 5F) CF2OB (3F, 4F, 5F) </ td> <td> 8 </ td> </ tr> <tr> <td> ※ </ td > <td> 3HB (3F) BH3 </ td> <td> 5 </ td> </ tr> <tr> <td> ※ </ td> <td> 3HBBH3 </ td> <td> 5 </ td> </ tr> <tr> <td> Δε [1KHz, 20 ° C]: 2.3 Δn [589nm, 20 ° C]: 0.079 Cp: 91 ° C γ1: 75.5mPa.s. -</ td> </ tr> </ TBODY> </ TABLE>

Comparative Example 2         <TABLE border = "1" borderColor = "# 000000" width = "85%"> <TBODY> <tr> <td> Category </ td> <td> LCD monomer code </ td> <td> Content ( %) </ Td> </ tr> <tr> <td> Ⅱ </ td> <td> 3HHV </ td> <td> 28 </ td> </ tr> <tr> <td> Ⅲ </ td> <td> 3HBB (3F, 4F, 5F) </ td> <td> 15 </ td> </ tr> <tr> <td> Ⅲ </ td> <td> 2BB (2F) B3 </ td> <td> 10 </ td> </ tr> <tr> <td> Ⅲ </ td> <td> 3HHBB (3F, 4F) </ td> <td> 4 </ td> </ tr> <tr> <td> Ⅲ </ td> <td> 3HHBB (3F, 4F, 5F) </ td> <td> 4 </ td> </ tr> <tr> <td> Ⅰ </ td> < td> H (5) BB (3F) B (3F, 4F) CF2OB (3F, 4F, 5F) </ td> <td> 8 </ td> </ tr> <tr> <td> Ⅲ </ td > <td> 3HH B (3F, 4F, 5F) </ td> <td> 7 </ td> </ tr> <tr> <td> Ⅲ </ td> <td> 5HH B (3F, 4F, 5F) </ td> <td> 8 </ td> </ tr> <tr> <td> Ⅱ </ td> <td> 2HH3 </ td> <td> 8 </ td> </ tr> < tr> <td> Ⅰ </ td> <td> H (5) H [3O] BB (3F, 5F) CF2OB (3F, 4F, 5F) </ td> <td> 8 </ td> </ tr > <tr> <td> Δε [1KHz, 20 ℃]: 8.4 Δn [589nm, 20 ℃]: 0.115 Cp: 90 ℃ γ <sub> 1 </ sub>: 81.0mPa.s. </ td> </ tr> </ TBODY> </ TABLE>

Comparative Example 3         <TABLE border = "1" borderColor = "# 000000" width = "85%"> <TBODY> <tr> <td> Category </ td> <td> LCD monomer code </ td> <td> Content ( %) </ Td> </ tr> <tr> <td> Ⅲ </ td> <td> 3HHB (4F) </ td> <td> 3.5 </ td> </ tr> <tr> <td> Ⅲ </ td> <td> 2HHB (4F, 5F) </ td> <td> 3.5 </ td> </ tr> <tr> <td> Ⅲ </ td> <td> 3HHB1 </ td> < td> 5 </ td> </ tr> <tr> <td> Ⅰ </ td> <td> H (5) HBB (3F, 5F) CF2OB (3F, 4F, 5F) </ td> <td> 3.5 </ td> </ tr> <tr> <td> Ⅲ </ td> <td> 1BHHV </ td> <td> 5.5 </ td> </ tr> <tr> <td> Ⅱ </ td > <td> 3HHV </ td> <td> 49 </ td> </ tr> <tr> <td> Ⅰ </ td> <td> H (5) BB (3F, 5F) CF2OB (3F, 4F , 5F) </ td> <td> 14.5 </ td> </ tr> <tr> <td> Ⅰ </ td> <td> H (5) BB (3F) B (3F, 4F) CF2OB (3F , 4F, 5F) </ td> <td> 8 </ td> </ tr> <tr> <td> Ⅲ </ td> <td> H (5) BBB (3F) B (3F, 4F, 5F ) </ td> <td> 2 </ td> </ tr> <tr> <td> Ⅲ </ td> <td> 3BBB (2F, 4F) </ td> <td> 5.5 </ td> < / tr> <tr> <td> Δε [1KHz, 20 ℃]: 7.1 Δn [589nm, 20 ℃]: 0.100 Cp: 72 ℃ γ <sub> 1 </ sub>: 62.3 mPa.s. </ td> </ tr> </ TBODY> </ TABLE>

Comparative Example 4         <TABLE border = "1" borderColor = "# 000000" width = "85%"> <TBODY> <tr> <td> Category </ td> <td> LCD monomer code </ td> <td> Content ( %) </ Td> </ tr> <tr> <td> Ⅱ </ td> <td> 3HHV </ td> <td> 16.5 </ td> </ tr> <tr> <td> ※ </ td> <td> 3HB (3F) BH3 </ td> <td> 6 </ td> </ tr> <tr> <td> ※ </ td> <td> 3HBBH3 </ td> <td> 4 < / td> </ tr> <tr> <td> Ⅲ </ td> <td> 3HHV1 </ td> <td> 4.5 </ td> </ tr> <tr> <td> Ⅲ </ td> < td> 3HHB (3F) B (3F, 4F, 5F) </ td> <td> 8.25 </ td> </ tr> <tr> <td> Ⅲ </ td> <td> 3HH B (3F, 4F , 5F) </ td> <td> 5.5 </ td> </ tr> <tr> <td> Ⅲ </ td> <td> 3HHBOCF3 </ td> <td> 6 </ td> </ tr> <tr> <td> Ⅲ </ td> <td> 5HHBOCF3 </ td> <td> 4.75 </ td> </ tr> <tr> <td> Ⅲ </ td> <td> 1BHHV </ td> <td> 6.25 </ td> </ tr> <tr> <td> Ⅰ </ td> <td> H (5) BB (3F) B (3F, 4F) CF2OB (3F, 4F, 5F) </ td> <td> 10 </ td> </ tr> <tr> <td> Ⅰ </ td> <td> H (5) BB (3F, 5F) CF2OB (3F, 4F, 5F) </ td> <td> 20 </ td> </ tr> <tr> <td> Ⅰ </ td> <td> H (5) H [3O] BB (3F, 5F) CF2OB (3F, 4F, 5F) </ td> <td> 8 </ td> </ tr> <tr> <td> Ⅲ </ td> <td> H (5) BBB (3F) B (3F, 4F, 5F) </ td> <td > 0.25 </ td> </ tr> <tr> <td> Δε [1KHz, 20 ℃]: 12.1 Δn [589nm, 2 0 ° C]: 0.123 Cp: 109.2 ° C γ <sub> 1 </ sub>: 94.6 mPa.s. </ td> </ tr> </ TBODY> </ TABLE>

Comparative Example 5         <TABLE border = "1" borderColor = "# 000000" width = "85%"> <TBODY> <tr> <td> Category </ td> <td> LCD monomer code </ td> <td> Content ( %) </ Td> </ tr> <tr> <td> Ⅱ </ td> <td> 3HHV </ td> <td> 28 </ td> </ tr> <tr> <td> Ⅱ </ td> <td> 3HHV1 </ td> <td> 4 </ td> </ tr> <tr> <td> Ⅰ </ td> <td> H (3) 1BB (3F) B (3F, 5F) CF2OB (3F, 4F, 5F) </ td> <td> 13 </ td> </ tr> <tr> <td> Ⅰ </ td> <td> H (5) H [3O] BB (3F, 5F) CF2OB (3F, 4F, 5F) </ td> <td> 8 </ td> </ tr> <tr> <td> Ⅰ </ td> <td> H (3) 1BB (3F, 5F) CF2OB (3F, 4F, 5F) </ td> <td> 18 </ td> </ tr> <tr> <td> Ⅲ </ td> <td> H (5) BBB (3F) B (3F, 4F, 5F) </ td> <td> 2 </ td> </ tr> <tr> <td> Ⅲ </ td> <td> H (3) 1BB (3F) B2 </ td> <td> 7 </ td> </ tr> <tr> <td> Ⅲ </ td> <td> H (5) HBB (3F) B (3F, 4F, 5F) </ td> <td> 2 </ td > </ tr> <tr> <td> Ⅱ </ td> <td> 2HH3 </ td> <td> 10 </ td> </ tr> <tr> <td> Ⅰ </ td> <td> H (5) HBB (3F, 5F) CF2OB (3F, 4F, 5F) </ td> <td> 8 </ td> </ tr> <tr> <td> Δε [1KHz, 20 ℃]: 11.5 Δn [589nm, 20 ° C]: 0.119 Cp: 68 ° C γ <sub> 1 </ sub>: 42.0mPa.s. </ td> </ tr> </ TBODY> </ TABLE>

Comparative Example 6         <TABLE border = "1" borderColor = "# 000000" width = "85%"> <TBODY> <tr> <td> Category </ td> <td> LCD monomer code </ td> <td> Content ( %) </ Td> </ tr> <tr> <td> Ⅱ </ td> <td> 3HHV </ td> <td> 57 </ td> </ tr> <tr> <td> Ⅲ </ td> <td> 3HHB3 </ td> <td> 6 </ td> </ tr> <tr> <td> Ⅲ </ td> <td> 1BHHV </ td> <td> 7 </ td> < / tr> <tr> <td> ※ </ td> <td> 3HHCOOBH3 </ td> <td> 3 </ td> </ tr> <tr> <td> ※ </ td> <td> 3HHCOOBH4 < / td> <td> 3 </ td> </ tr> <tr> <td> Ⅲ </ td> <td> 3HBB (3F, 4F, 5F) </ td> <td> 3 </ td> < / tr> <tr> <td> Ⅲ </ td> <td> 3HH B (3F, 4F, 5F) </ td> <td> 3 </ td> </ tr> <tr> <td> Ⅰ < / td> <td> H (5) BB (3F, 5F) CF2OB (3F, 4F, 5F) </ td> <td> 8 </ td> </ tr> <tr> <td> ※ </ td > <td> 3HB (3F) BH3 </ td> <td> 5 </ td> </ tr> <tr> <td> ※ </ td> <td> 3HBBH3 </ td> <td> 5 </ td> </ tr> <tr> <td> ※ </ td> <td> HTMPOOC8COOHTMP </ td> <td> 200ppm </ td> </ tr> <tr> <td> Δε [1KHz, 20 ℃] : 2.3 Δn [589nm, 20 ° C]: 0.079 Cp: 93 ° C γ <sub> 1 </ sub>: 79.4 mPa.s. </ td> </ tr> </ TBODY> </ TABLE>

Comparative Example 7         <TABLE border = "1" borderColor = "# 000000" width = "85%"> <TBODY> <tr> <td> Category </ td> <td> LCD monomer code </ td> <td> Content ( %) </ Td> </ tr> <tr> <td> Ⅲ </ td> <td> 3HHB (4F) </ td> <td> 3.5 </ td> </ tr> <tr> <td> Ⅲ </ td> <td> 2HHB (4F, 5F) </ td> <td> 3.5 </ td> </ tr> <tr> <td> Ⅲ </ td> <td> 3HHB1 </ td> < td> 5 </ td> </ tr> <tr> <td> Ⅰ </ td> <td> H (5) HBB (3F, 5F) CF2OB (3F, 4F, 5F) </ td> <td> 3.5 </ td> </ tr> <tr> <td> Ⅲ </ td> <td> 1BHHV </ td> <td> 5.5 </ td> </ tr> <tr> <td> Ⅱ </ td > <td> 3HHV </ td> <td> 49 </ td> </ tr> <tr> <td> Ⅰ </ td> <td> H (5) BB (3F, 5F) CF2OB (3F, 4F , 5F) </ td> <td> 14.5 </ td> </ tr> <tr> <td> Ⅰ </ td> <td> H (5) BB (3F) B (3F, 4F) CF2OB (3F , 4F, 5F) </ td> <td> 8 </ td> </ tr> <tr> <td> Ⅲ </ td> <td> H (5) BBB (3F) B (3F, 4F, 5F ) </ td> <td> 2 </ td> </ tr> <tr> <td> Ⅲ </ td> <td> 3BBB (2F, 4F) </ td> <td> 5.5 </ td> < / tr> <tr> <td> ※ </ td> <td> HTMPOOC8COOHTMP </ td> <td> 1500ppm </ td> </ tr> <tr> <td> Δε [1KHz, 20 ℃]: 7.2 Δn [589nm, 20 ° C]: 0.100 Cp: 71 ° C γ <sub> 1 </ sub>: 67.2mPa.s. </ td> </ tr> </ TBODY> </ TABLE>

Test results of basic performance parameters of Examples 1-5 and Comparative Examples 1-5         <TABLE border = "1" borderColor = "# 000000" width = "85%"> <TBODY> <tr> <td> Examples </ td> <td> Cp (℃) </ td> <td> Δn </ td> <td> △ ε </ td> <td> γ <sub> 1 </ sub> (mPa · s) </ td> </ tr> <tr> <td> 1 </ td> < td> 92 </ td> <td> 0.079 </ td> <td> 2.4 </ td> <td> 75.3 </ td> </ tr> <tr> <td> 2 </ td> <td> 90 </ td> <td> 0.115 </ td> <td> 8.3 </ td> <td> 80.6 </ td> </ tr> <tr> <td> 3 </ td> <td> 71 </ td > <td> 0.100 </ td> <td> 7.2 </ td> <td> 61.5 </ td> </ tr> <tr> <td> 4 </ td> <td> 110 </ td> <td > 0.123 </ td> <td> 12.1 </ td> <td> 93.6 </ td> </ tr> <tr> <td> 5 </ td> <td> 68 </ td> <td> 0.119 < / td> <td> 11.6 </ td> <td> 41.5 </ td> </ tr> <tr> <td> D1 </ td> <td> 91 </ td> <td> 0.079 </ td> <td> 2.3 </ td> <td> 75.5 </ td> </ tr> <tr> <td> D2 </ td> <td> 90 </ td> <td> 0.115 </ td> <td> 8.4 </ td> <td> 81.0 </ td> </ tr> <tr> <td> D3 </ td> <td> 72 </ td> <td> 0.100 </ td> <td> 7.1 </ td> <td> 62.3 </ td> </ tr> <tr> <td> D4 </ td> <td> 109 </ td> <td> 0.123 </ td> <td> 12.1 </ td> < td> 94.6 </ td> </ tr> <tr> <td> D5 </ td> <td> 68 </ td> <td> 0.119 </ td> <td> 11.5 </ td> <td> 42.0 </ td> </ tr> <tr> <td> D6 </ td> <td > 93 </ td> <td> 0.079 </ td> <td> 2.3 </ td> <td> 79.4 </ td> </ tr> <tr> <td> D7 </ td> <td> 71 < / td> <td> 0.100 </ td> <td> 7.2 </ td> <td> 67.2 </ td> </ tr> </ TBODY> </ TABLE>

Test results of trust performance parameters of Examples 1-5         <TABLE border = "1" borderColor = "# 000000" width = "85%"> <TBODY> <tr> <td> Production Lot Number </ td> <td> Conditions </ td> <td> VHR (%, 5V, 16.61ms, 20 ℃) </ td> <td> VHR (%, 1V, 166.7m, 60 ℃) </ td> <td> ρ × 10 <sup> 13 </ sup> (Ω • cm) </ td> </ tr> <tr> <td> 1 </ td> <td> Initial </ td> <td> 99.81 </ td> <td> 98.63 </ td> <td> 54.2 </ td > </ tr> <tr> <td> UV </ td> <td> 99.8 </ td> <td> 98.59 </ td> <td> 52.3 </ td> </ tr> <tr> <td> High temperature </ td> <td> 99.8 </ td> <td> 98.63 </ td> <td> 33.8 </ td> </ tr> <tr> <td> 2 </ td> <td> Initial </ td> <td> 99.61 </ td> <td> 97.45 </ td> <td> 18.3 </ td> </ tr> <tr> <td> UV </ td> <td> 99.59 </ td> < td> 97.4 </ td> <td> 17.6 </ td> </ tr> <tr> <td> High temperature </ td> <td> 99.6 </ td> <td> 97.46 </ td> <td> 12.5 </ td> </ tr> <tr> <td> 3 </ td> <td> Initial </ td> <td> 99.63 </ td> <td> 97.45 </ td> <td> 19.3 </ td > </ tr> <tr> <td> UV </ td> <td> 99.62 </ td> <td> 97.41 </ td> <td> 18.6 </ td> </ tr> <tr> <td> High temperature </ td> <td> 99.64 </ td> <td> 97.46 </ td> <td> 13.5 </ td> </ tr> <tr> <td> 4 </ td> <td> Initial </ td> <td> 99.48 </ td> <td> 95.63 </ td> <td> 5.6 </ td> </ tr> <tr> <td> Outside </ td> <td> 99.44 </ td> <td> 95.59 </ td> <td> 5.2 </ td> </ tr> <tr> <td> High temperature </ td> <td> 99.46 </ td> <td> 95.63 </ td> <td> 4.5 </ td> </ tr> <tr> <td> 5 </ td> <td> Initial </ td> <td> 99.46 </ td> < td> 95.63 </ td> <td> 7.2 </ td> </ tr> <tr> <td> UV </ td> <td> 99.42 </ td> <td> 95.59 </ td> <td> 6.3 </ td> </ tr> <tr> <td> High temperature </ td> <td> 99.44 </ td> <td> 95.63 </ td> <td> 4.3 </ td> </ tr> </ TBODY > </ TABLE>

Test results of trust performance parameters of Comparative Examples 1-7         <TABLE border = "1" borderColor = "# 000000" width = "85%"> <TBODY> <tr> <td> Production Lot Number </ td> <td> Conditions </ td> <td> VHR (%, 5V, 16.61ms, 20 ℃) </ td> <td> VHR (%, 1V, 166.7ms, 60 ℃) </ td> <td> ρ × 10 <sup> 13 </ sup> </ td> < / tr> <tr> <td> (Ω • cm) </ td> </ tr> <tr> <td> D1 </ td> <td> Initial </ td> <td> 99.5 </ td> < td> 98.12 </ td> <td> 44.2 </ td> </ tr> <tr> <td> UV </ td> <td> 99.28 </ td> <td> 98.01 </ td> <td> 36.6 </ td> </ tr> <tr> <td> High temperature </ td> <td> 99.12 </ td> <td> 97.82 </ td> <td> 24.5 </ td> </ tr> <tr> <td> D2 </ td> <td> Initial </ td> <td> 99.37 </ td> <td> 97.34 </ td> <td> 13.2 </ td> </ tr> <tr> <td> UV </ td> <td> 99.23 </ td> <td> 97.02 </ td> <td> 9.2 </ td> </ tr> <tr> <td> High temperature </ td> <td> 99.13 </ td> <td> 97.13 </ td> <td> 3.4 </ td> </ tr> <tr> <td> D3 </ td> <td> Initial </ td> <td> 99.32 </ td> < td> 97.04 </ td> <td> 12.7 </ td> </ tr> <tr> <td> UV </ td> <td> 99.15 </ td> <td> 97 </ td> <td> 10.7 </ td> </ tr> <tr> <td> High temperature </ td> <td> 99.02 </ td> <td> 96.89 </ td> <td> 3.5 </ td> </ tr> <tr> <td> D4 </ td> <td> Initial </ td> <td> 99.25 </ td> <td> 95.43 </ td> <td> 3 </ td> </ tr> <tr> <td> UV </ td> <td> 99.08 </ td> <td> 95.23 </ td> <td> 1.3 </ td> </ tr> <tr> <td > High temperature </ td> <td> 99.02 </ td> <td> 95.11 </ td> <td> 0.2 </ td> </ tr> <tr> <td> D5 </ td> <td> Initial < / td> <td> 99.18 </ td> <td> 95.36 </ td> <td> 3.5 </ td> </ tr> <tr> <td> UV </ td> <td> 99.02 </ td> <td> 95.12 </ td> <td> 1.4 </ td> </ tr> <tr> <td> High temperature </ td> <td> 98.94 </ td> <td> 95.01 </ td> <td> 0.1 </ td> </ tr> <tr> <td> D6 </ td> <td> Initial </ td> <td> 99.6 </ td> <td> 98.25 </ td> <td> 46.7 </ td> </ tr> <tr> <td> UV </ td> <td> 99.32 </ td> <td> 98.12 </ td> <td> 39.6 </ td> </ tr> <tr> <td > High temperature </ td> <td> 99.29 </ td> <td> 97.9 </ td> <td> 27.5 </ td> </ tr> <tr> <td> D7 </ td> <td> Initial < / td> <td> 99.46 </ td> <td> 97.23 </ td> <td> 13.7 </ td> </ tr> <tr> <td> UV </ td> <td> 99.22 </ td> <td> 97.11 </ td> <td> 11.8 </ td> </ tr> <tr> <td> High temperature </ td> <td> 99.15 </ td> <td> 97.02 </ td> <td> 4.5 </ td> </ tr> </ TBODY> </ TABLE>

Low temperature storage results of Examples 1-5 and Comparative Examples 1-7         <TABLE border = "1" borderColor = "# 000000" width = "85%"> <TBODY> <tr> <td> </ td> <td> Low temperature storage (days) </ td> </ tr> < tr> <td> -20 ℃ </ td> <td> -30 ℃ </ td> <td> -40 ℃ </ td> <td> -50 ℃ </ td> </ tr> <tr> < td> 1 </ td> <td> 30 </ td> <td> 30 </ td> <td> 25 </ td> <td> 16 </ td> </ tr> <tr> <td> 2 </ td> <td> 30 </ td> <td> 30 </ td> <td> 30 </ td> <td> 30 </ td> </ tr> <tr> <td> 3 </ td > <td> 30 </ td> <td> 30 </ td> <td> 30 </ td> <td> 30 </ td> </ tr> <tr> <td> 4 </ td> <td > 30 </ td> <td> 30 </ td> <td> 30 </ td> <td> 30 </ td> </ tr> <tr> <td> 5 </ td> <td> 30 < / td> <td> 30 </ td> <td> 30 </ td> <td> 30 </ td> </ tr> <tr> <td> D1 </ td> <td> 25 </ td> <td> 18 </ td> <td> 13 </ td> <td> 2 </ td> </ tr> <tr> <td> D2 </ td> <td> 22 </ td> <td> 17 </ td> <td> 12 </ td> <td> 10 </ td> </ tr> <tr> <td> D3 </ td> <td> 23 </ td> <td> 18 </ td> <td> 11 </ td> <td> 8 </ td> </ tr> <tr> <td> D4 </ td> <td> 21 </ td> <td> 16 </ td> < td> 13 </ td> <td> 9 </ td> </ tr> <tr> <td> D5 </ td> <td> 24 </ td> <td> 15 </ td> <td> 12 </ td> <td> 7 </ td> </ tr> <tr> <td> D6 </ td> <td> 30 </ td> <td> 25 </ td> <td> 14 </ td > <td> 11 </ td> </ tr> <tr> <td> D7 </ td> <td> 25 </ td> <td> 20 </ td> <td> 13 </ td> <td> 10 </ td> </ tr> </ TBODY> </ TABLE>

By comparing Example 1 and Comparative Example 1, Example 2 and Comparative Example 2, Example 3 and Comparative Example 3, Example 4 and Comparative Example 4, and Example 5 and Comparative Example 5, it can be seen that The resistivity and VHR of the mixture referred to in this patent are greatly improved, especially the light and heat resistance is significantly improved. Comparing the reliability test data of Example 1 and Comparative Example 6, it can be seen that the mixed crystal combination represented by Example 1 The resistivity and VHR of the material under initial, ultraviolet, and high temperature conditions are better than those of Comparative Example 6, indicating that the mixture referred to in this patent has better reliability; comparison of low-temperature storage results of Example 3 and Comparative Example 7 can be seen. The mixed crystal composition represented by Example 3 can survive at -50 ° C for 30 days, while the mixed crystal composition represented by Comparative Example 7 can survive only at -20 ° C for 25 days, indicating that the low temperature miscibility of the mixture referred to in this patent is more it is good.

Although the present invention only enumerates the specific substances and proportion mass percentages of the above five embodiments, and tests the performance of the composed liquid crystal composition, the liquid crystal composition of the present invention can be used on the basis of the above embodiments. Further development and modification of the compounds represented by the general formulae I, II, and III, and the preferred compounds of the general formulae I, II, and III, can achieve the object of the present invention.

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Claims (8)

A dielectric positive liquid crystal composition, wherein the liquid crystal composition includes one or more component A composed of a liquid crystal compound represented by Formula I, one or more component B composed of a liquid crystal compound represented by Formula II Component C consisting of one or more liquid crystal compounds represented by general formula III, and further comprising one or more additive component D consisting of compounds represented by general formula S-1, I, Ⅱ, III, S-1, wherein, Cyclealkyl is selected from cyclopentyl, cyclobutyl, cyclopropyl any of one selected from the following ①, ②, ③, in any of the groups R ₁ ④ shown in one kind, ①H, Cl, F, CN, OCN, OCF ₃ , CF ₃ , CHF ₂ , CH ₂ F, OCHF ₂ , SCN, NCS, SF ₅ , ② Linear alkyl groups with 1 to 15 carbon atoms, and 1 to 15 carbon atoms A linear alkoxy group, a linear alkenyl group having 2 to 15 carbon atoms, or a linear alkenyl group having 2 to 15 carbon atoms, ③ one or more of -CH ₂ in the above ② may be independent of each other Is replaced by -CH = CH-, -C≡C-, -COO-, -OOC-, cyclobutane, cyclopentane, -O- or -S- and replaced in a form where the oxygen atoms are not directly connected. The formed group is at least one of the groups formed by one or more of H in the above-mentioned ② each being independently replaced by F and Cl; R _{2 is} selected from the group consisting of H, a linear alkane having 1 to 10 carbon atoms Group, a linear alkoxy group having 1 to 10 carbon atoms, a linear alkenyl group having 2 to 10 carbon atoms, or a linear alkenyl group having 3 to 8 carbon atoms, in which any H may be substituted by F; R _is selected from , , Any of a linear alkyl group having 1 to 10 carbon atoms, a linear alkoxy group having 1 to 10 carbon atoms, or a linear alkenyl group having 2 to 10 carbon atoms; X ₁ , X ₂ , X ₃ , and X ₄ are each selected from any one of H and F; Y _{1 is} selected from F, a straight-chain alkyl group having 1 to 6 carbon atoms, a straight-chain alkoxy group, or a carbon group having 2 to 6 carbon atoms Any of the straight-chain alkenyl groups, wherein H is unsubstituted or mono-substituted by F or poly-substituted by F; Z ₁ and Z ₂ are each selected from a single bond, -CH _2- , -CH ₂ -CH _2- ,-(CH ₂ ) ₃ -,-(CH ₂ ) _4- , -CH = CH-, -C≡C-, -COO-, -OOC-, -CF ₂ O-, -OCH _2- , -CH ₂ O-, -OCF _2- , -CF ₂ CH _2- , -CH ₂ CF _2- , -C ₂ F _4- , or -CF = CF-; Z _{3 is} selected from a single bond, -CH ₂ -, -CH ₂ -CH ₂ -,-(CH ₂ ) ₃ -,-(CH ₂ ) _4- , -CH = CH-, -C≡C-, -COO-, -OOC-, -OCH _2- Any one of -CH ₂ O-, -CF ₂ CH _2- , -CH ₂ CF _2- , -C ₂ F _4- , or -CF = CF-; , , , Selected from single bond, , , , , , , , , , , , , Any one of the groups; It is selected from any one of the following groups (a) and (b), (a) a trans 1,4-cyclohexylene group, and a 1,4-cyclohexenyl group, one or more of which are different The ortho-CH ₂ -group may be substituted or unsubstituted by -O- or -S-; (b) a 1,4-phenylene group in which one or two -CH- groups are substituted or unsubstituted by N, One or two H may be substituted or unsubstituted by F; n represents 3, 4, 5, 6, 9, 10; a, b represents 0, 1, 2, 3, c represents 1 or 2, and d represents 0, 1, 2 and a + b + c≤5. The dielectric positive liquid crystal composition according to item 1 of the scope of patent application, wherein, in the liquid crystal composition, the weight percentage content of component A is 1 to 50%, and the weight percentage content of component B is 1 ~ 60%, the weight percentage content of component C is 1 ~ 50%. The dielectric positive liquid crystal composition according to item 2 of the patent application scope, wherein the content of the additive component D in the liquid crystal composition is 100-3000 ppm. The dielectric positive liquid crystal composition according to any one of claims 1 to 3, wherein the compound represented by the general formula I is specifically a compound represented by the following formula I-1 to formula I-3 , (I-1), (I-2), (I-3), wherein R _{1 is} selected from any one of the following groups ①, ②, ③, ④, ① H, Cl, F, CN, OCN, OCF ₃ , CF ₃ , CHF ₂ , CH ₂ F, OCHF ₂ , SCN, NCS, SF ₅ ② Linear alkyl group having 1 to 15 carbon atoms, linear alkoxy group having 1 to 15 carbon atoms, and straight chain having 2 to 15 carbon atoms Alkenyl or linear alkenyloxy having 2 to 15 carbon atoms, ③ one or more of -CH ₂ -in the above ② may be independently independently -CH = CH-, -C≡C-, -COO- , -OOC-, cyclobutane, cyclopentane, -O- or -S- are substituted and replaced in a form where the oxygen atoms are not directly connected, ④ one or more of H in the above ② are independent of each other At least one of the groups formed by being substituted with F and Cl; X ₁ and X ₂ are each selected from any one of H and F; Z ₁ and Z ₂ are each selected from a single bond, -CH _2- , -CH ₂ -CH ₂ -,-(CH ₂ ) ₃ -,-(CH ₂ ) _4- , -CH = CH-, -C≡C-, -COO-, -OOC-, -CF ₂ O-, -OCH _2- , -CH ₂ O-, -OCF _2- , -CF ₂ CH _2- , -CH ₂ CF _2- , -C ₂ F _4- , or -CF = CF-; , , Selected from single bond, , , , , , , , , Any one of the groups; n represents 3, 4, 5, 6, 9, 10; a, b represents 0, 1, 2, 3, c represents 1 or 2, and a + b + c≤5. The dielectric positive liquid crystal composition according to item 4 of the scope of patent application, wherein the compound represented by the general formula I is specifically a compound represented by the following formula I-1-a ~ I-3-t: (I-1-a), (I-1-b), (I-1-c), (I-1-d), (I-1-e), (I-1-f), (I-1-g), (I-1-h), (I -1-i), (I-1-j), (I-1-k), (I-1-l), (I-1-m), (I-1-n), (I-1-o), (I-1-p), (I-1-q), (I-1-r), (I-1-s), (I-1-t), (I-2-a), (I-2-b), (I-2-c), (I-2-d), (I-2-e), (I-2-f), (I-2-g), (I-2-h), (I-2-i), (I-2-j), (I-2-k), (I-2-l), (I-2-m), (I-2-n), (I-2-o), (I-2-p), (I-2-q), (I-2-r), (I-2-s), (I-2-t), (I-3-a), (I-3-b), (I-3-c), (I-3-d), (I-3-e), (I-3-f), (I-3-g), (I-3-h), (I-3-i), (I-3-j), (I-3-k), (I-3-l), (I-3-m), (I-3-n), (I-3-o), (I-3-p), (I-3-q), (I-3-r), (I-3-s), (I-3-t). Among them, R _{1 is} selected from any one of the following groups ①, ②, ③, ④: ①H, Cl, F, CN, OCN, OCF ₃ , CF ₃ , CHF ₂ , CH ₂ F, OCHF ₂ , SCN , NCS, SF ₅ ② Linear alkyl with 1 to 15 carbon atoms, linear alkoxy with 1 to 15 carbon atoms, linear alkenyl or carbon with 2 to 15 carbon atoms A straight alkenyloxy group of 2 to 15, ③ one or more of -CH ₂ -in the above ② may be independently independently -CH = CH-, -C≡C-, -COO-, -OOC-, ring A group formed by substitution of butane, cyclopentane, -O-, or -S- and the form in which the oxygen atoms are not directly connected after replacement, ④ one or more H in the above ② are each independently replaced by F, Cl At least one of the formed groups; (F) represents any one of H or F; (O) represents any one of O or -CH _2- . The dielectric positive liquid crystal composition according to any one of claims 1 to 3, wherein the compound represented by the general formula II is specifically a compound represented by the following formula II-a to formula II-b , Ⅱ-a, II-b. The dielectric positive liquid crystal composition according to any one of claims 1 to 3, wherein the compound represented by the general formula III is specifically represented by the following formulae III-a to III-u Compound: (Ⅲ-a), (Ⅲ-b), (Ⅲ-c), (Ⅲ-d), (Ⅲ-e), (Ⅲ-f), (Ⅲ-g), (Ⅲ-h), (Ⅲ-i), (Ⅲ-j), (Ⅲ-k), (Ⅲ-l), (Ⅲ-m), (Ⅲ-n), (Ⅲ-o), (Ⅲ-p), (Ⅲ-q), (Ⅲ-r), (Ⅲ-s), (Ⅲ-t), (III-u), wherein R _{3 is} selected from , , Any one of a linear alkyl group having 1 to 10 carbon atoms, a linear alkoxy group having 1 to 10 carbon atoms or a linear alkenyl group having 2 to 10 carbon atoms; Y _{1 is} selected from F Any one of a straight-chain alkyl group, a straight-chain alkoxy group having 1 to 6 carbon atoms, or a straight-chain alkenyl group having 2 to 6 carbon atoms, wherein H is unsubstituted or mono-substituted by F Substituted by F; (F) represents either H or F. The dielectric positive liquid crystal composition according to any one of claims 1 to 3, which is applied to a liquid crystal display element and a liquid crystal display.