TWI570222B - Liquid crystal composition and liquid crystal display element using the same - Google Patents

Description

Liquid crystal composition and liquid crystal display element using same

The present invention relates to a liquid crystal composition and a liquid crystal display element which are used as constituent members of a liquid crystal display device or the like.

The liquid crystal display element is used in various measuring apparatuses, such as a timepiece and a desktop type electronic computer, an automobile panel, a word processor, an electronic notebook, a printer, a computer, a television, a timepiece, an advertisement display board, etc. As a liquid crystal display method, among them, there are TN (twisted nematic) type, STN (super twisted nematic) type, VA (vertical alignment) type using TFT (thin film transistor), or IPS (in-plane switching). Type and so on. The liquid crystal composition used in these liquid crystal display elements is required to exhibit stability in terms of moisture, air, heat, light, etc., and to display a liquid crystal phase in a wide temperature range as wide as possible around a room temperature. Low viscosity and low drive voltage. Further, in order to optimize the dielectric anisotropy (Δε) or refractive index anisotropy (Δn) which are most suitable for each display element, the liquid crystal composition is composed of several kinds to several tens of kinds of compounds. Composition.

In the vertical alignment type display, a liquid crystal composition having a negative Δ ε is used, and it is widely used for a liquid crystal TV or the like. On the other hand, in all driving methods, low voltage driving, high speed response, and a wide operating temperature range are required. That is, it is required that Δε is positive and the absolute value is large, the viscosity (η) is small, and the high nematic phase-isotropic liquid phase transition temperature (T _ni ) is required. Further, from the setting of the product Δn × d of Δn and the cell gap (d), it is necessary to adjust the Δn of the liquid crystal composition to the cell gap to be adjusted to an appropriate range. Further, when a liquid crystal display element is applied to a television or the like, a liquid crystal composition having a small γ ₁ is required because of high speed responsiveness. Conventionally, in order to form a liquid crystal composition having a small γ ₁ , a compound having a dialkyl bicyclohexane skeleton is generally used (see Patent Document 1). However, although the bicyclohexane compound has a high effect of reducing γ ₁ , a compound having a high vapor pressure and a short alkyl chain length is particularly preferable. Further, since the T _{ni is} also low, the alkyl bicyclohexane compound is a compound having a total of side chain lengths of 7 or more in total, and the compound having a short side chain length is not sufficiently reviewed. For the truth.

On the other hand, the use of the liquid crystal display element has been expanded, and the use method and manufacturing method have also been largely changed. In order to cope with such changes, it is required to optimize the characteristics other than the basic physical property values. In other words, a liquid crystal display device using a liquid crystal composition is widely used such as a VA (Vertical Alignment) type or an IPS (In-Plane Switching) type, and a display element having an ultra-large size of 50 Å or more is also put into practical use. With the increase in the size of the substrate, the method of injecting the liquid crystal composition into the substrate is also the mainstream of the injection method from the conventional vacuum injection method to the ODF (One Drop Fill) method (see Patent Document 2), but the liquid crystal is used. When the composition is dropped onto the substrate, the problem that the drop marks cause a decrease in display quality is revealed. Furthermore, the pretilt angle of the liquid crystal material in the liquid crystal display element is generated for the purpose of high-speed responsiveness, and there is a development of a PS liquid crystal display element. (polymer stabilized, polymer stabilization), PSA liquid crystal display element (polymer sustained alignment) (refer to Patent Document 3), this problem becomes a bigger problem. That is, these display elements are characterized by the addition of a monomer to the liquid crystal composition to harden the monomer in the composition. The liquid crystal composition for the active matrix is specific for the necessity of maintaining a high voltage holding ratio, and the use is limited to a compound having an ester bond in the compound. The single-system acrylate used in the PSA liquid crystal display device is mainly used, and generally has an ester bond in the compound. Such a compound generally does not use a liquid crystal compound as a main matrix (see Patent Document 3). Such a foreign matter induces the occurrence of dripping marks, and deterioration of the yield of the liquid crystal display element due to poor display is a problem. Further, when an additive such as an antioxidant or a light absorber is added to the liquid crystal composition, there is a problem that the yield is deteriorated.

Here, the so-called dripping trace is defined as a phenomenon in which the trace of the liquid crystal composition is dropped when it is displayed in black. In the suppression of the dropping trace, there is disclosed a method of forming a polymer layer in a liquid crystal layer by polymerization of a polymerizable compound mixed in a liquid crystal composition, and suppressing a dripping trace caused by a relationship with an alignment control film. (Patent Document 4). However, in this method, there is a problem of burning of the display due to the polymerizable compound added to the liquid crystal, and the effect of suppressing the dripping trace is insufficient, and it is required to maintain the basic characteristics as a liquid crystal display element. Development of liquid crystal display elements that do not easily occur when burning or dropping traces.

[Previous Technical Literature] [Patent Literature]

[Patent Document 1] Japanese Patent Publication No. 2008-505235

[Patent Document 2] Japanese Laid-Open Patent Publication No. Hei 6-235925

[Patent Document 3] Japanese Laid-Open Patent Publication No. 2002-357830

[Patent Document 4] Japanese Patent Laid-Open Publication No. 2006-58755

An object of the present invention is to provide a characteristic of a liquid crystal display element and a cavitation of a display element without making dielectric constant anisotropy, viscosity, nematic phase upper limit temperature, low temperature nematic phase stability, γ ₁ or the like. The liquid crystal composition suitable for a liquid crystal display element and a liquid crystal display element using the same are those which are inferior in the characteristics of the liquid crystal display element which are stable in the production of the liquid crystal material in the ODF process.

In order to solve the above problems, the present inventors have reviewed the constitution of various liquid crystal compositions which are most suitable for the production of liquid crystal display elements by the dropping method, and found that liquid crystal display elements can be suppressed by using a specific liquid crystal compound at a specific mixing ratio. The occurrence of the dripping marks in the process, and the completion of the invention of the present invention was achieved.

The invention of the present invention provides a liquid crystal composition having a negative dielectric anisotropy, which comprises a compound represented by the formula (i) and a compound represented by (ii-b). And providing a liquid crystal display element using the liquid crystal composition.

The liquid crystal display device of the present invention is characterized in that it is excellent in high-speed responsiveness and has less occurrence of cauterization, and is less likely to cause dripping marks due to its production. Therefore, it is suitable for display elements such as liquid crystal TVs and monitors.

1‧‧‧Polar plate

2‧‧‧Substrate

3‧‧‧Transparent electrode or transparent electrode with active components

4‧‧‧Alignment film

5‧‧‧LCD

11‧‧‧ gate electrode

12‧‧‧Anodic Oxide Film

13‧‧‧ gate insulation

14‧‧‧Transparent electrode

15‧‧‧汲 electrode

16‧‧‧Ohm contact layer

17‧‧‧Semiconductor layer

18‧‧‧Protective film

19a‧‧‧Source electrode 1

19b‧‧‧Source electrode 2

100‧‧‧Substrate

101‧‧‧Protective layer

Fig. 1 is an example of the structure of a liquid crystal display element of the present invention.

Fig. 2 is a configuration example of an inverted staggered type thin film transistor.

[Formation of the Invention]

As described above, the process of the occurrence of the dropping trace is not known at the present time point, but there is a high possibility that the impurity in the liquid crystal compound is related to the interaction between the alignment film and the chromatographic phenomenon. Although the impurities in the liquid crystal compound are greatly affected by the process of the compound, the method for producing the compound is not necessarily the same, for example, even if the number of carbon atoms in the side chain is different. That is, since the liquid crystal compound is manufactured by a precise process, the cost thereof is high in the finished product, and the improvement in manufacturing efficiency is strongly demanded. Therefore, in order to use at least a cheap raw material, the number of carbon atoms in only the side chain is different, and the manufacturer is also highly efficient in the case of completely another raw material. Therefore, the process of the liquid crystal original is different for each original, and the process is the same, and the raw materials are mostly different, and as a result, different impurities are mixed in each of the originals. However, the traces of the drops are due to the extremes. The possibility of occurrence of trace amounts of impurities is limited only by the purification of the original body to suppress the occurrence of dripping marks.

On the other hand, the general method for producing a liquid crystal precursor has a tendency to be defined for each of the original bodies after the process is established. Even in the development of analytical techniques, it is not easy to understand exactly whether or not the impurities are mixed in. It is necessary to carry out the design of the composition by mixing the impurities determined by each of the originals. The inventors of the present invention reviewed the relationship between the impurities of the liquid crystal precursor and the traces of the dripping, and as a result, it has been empirically understood that even if it is contained in the composition, there are impurities which are less likely to occur in the dripping and impurities which are likely to occur. Therefore, in order to suppress the occurrence of dripping marks, it is important to use a specific compound in a specific mixing ratio, in particular, to know the presence of a composition in which dripping marks are not easily generated. The preferred embodiments described below are based on the foregoing points.

In the liquid crystal composition of the present invention, the compound represented by the formula (i) is contained as the first component, preferably from 24 to 50% by mass, more preferably from 25 to 45% by mass, even more preferably from 27 to 45. The mass %, more specifically, when the response speed is important, is preferably 27 to 50% by mass, and when the driving voltage is more important, it is preferably 24% by mass to 40% by mass.

The compound represented by the formula (ii-b), as the second component, preferably contains 5 to 30% by mass, more preferably 7 to 25% by mass, even more preferably 10 to 25% by mass, particularly preferably contains 12 to 25 mass%.

In addition, the liquid crystal composition of the present invention may contain one or two or more kinds of compounds represented by the general formula (L) as the third component. (wherein R ^L1 and R ^L2 each independently represent an alkyl group having 1 to 8 carbon atoms, and one of the alkyl groups or two or more non-adjacent-CH ₂ - groups may independently be -CH =CH-, -C≡C-, -O-, -CO-, -COO- or -OCO-substitution, OL means 0, 1, 2 or 3, B ^L1 , B ^L2 and B ^L3 are each independently represented Free (a) 1,4-cyclohexylene (one -CH ₂ - or two or more -CH ₂ - which are not adjacent in this group may be substituted into -O-) and (b) 1,4 a group in a group consisting of a phenyl group (one -CH= or a non-contiguous two or more -CH= can be substituted into -N=), the above group (a), The groups (b) are each independently substituted by a cyano group, a fluorine atom or a chlorine atom, and L ^L1 and L ^L2 each independently represent a single bond, -CH ₂ CH ₂ -, -(CH ₂ ) ₄ -, -OCH ₂ - , -CH ₂ O-, -COO-, -OCO-, -OCF ₂ -, -CF ₂ O-, -CH=NN=CH-, -CH=CH-, -CF=CF- or -C≡C - When OL is 2 or 3 and L ^L2 is plural, they may be the same or different. When OL is 2 or 3 and B ^L3 is plural, they may be the same or different, except (i ) a compound represented by the formula, a compound represented by the formula (ii-b), and a compound represented by the formula (X) described later ).

R ^L1 and R ^L2 are preferably a linear alkyl group having 1 to 5 carbon atoms and a linear carbon number of 1 to 4 when the ring to which the ring is bonded is a phenyl group (aromatic). (or more) alkoxy group and alkenyl group having 4 to 5 carbon atoms, wherein the ring to which the bond is bonded is cyclohexane, pyran and In the case of a saturated ring structure such as an alkane, a linear alkyl group having 1 to 5 carbon atoms, a linear alkoxy group having 1 to 4 (or more) carbon atoms, and a linear carbon are preferable. An alkenyl group having 2 to 5 atoms.

When the chemical stability of the liquid crystal composition is required, the compound represented by the formula (L) preferably has no chlorine atom in its molecule.

The lower limit of the dielectric anisotropy (??) of the compound represented by the formula (L) is -3 in one embodiment, and -2.5 in another embodiment. In another embodiment, it is -2, and in still another embodiment, it is -1.5. Further, in another embodiment, it is -1, and in another embodiment, it is -0.5. On the other hand, the upper limit of the dielectric anisotropy (??) of the compound represented by the formula (L) is 3 in one embodiment and 2.5 in another embodiment. In still another embodiment, it is 2, and in still another embodiment, it is 1.5. In another embodiment, it is 1, and in another embodiment, it is 0.5.

The kind of the compound which can be combined is not particularly limited, and it is suitably used in combination according to the desired properties such as solubility at low temperature, transfer temperature, electrical reliability, and birefringence. The type of the compound to be used is, for example, one type in one embodiment of the present invention. Alternatively, in another embodiment of the present invention, there are two types. Further, in still another embodiment of the present invention, there are three types. Furthermore, in still another embodiment of the present invention, there are four types. Furthermore, in the other embodiment of the present invention, there are five types. Furthermore, in another embodiment of the present invention, there are six types. Furthermore, in another embodiment of the present invention, there are seven types. Furthermore, in still another embodiment of the present invention, there are eight types. Furthermore, in another embodiment of the present invention, there are nine types. Furthermore, in another embodiment of the present invention, it is 10 or more types.

In the liquid crystal composition of the present invention, the content of the compound represented by the formula (L) must be in accordance with solubility at low temperature, transfer temperature, and electricity. The required properties such as reliability, birefringence, process suitability, dripping marks, cauterization, dielectric anisotropy or volatility are suitably adjusted.

The lower limit of the content of the liquid crystal composition of the present invention is, for example, 3% in one embodiment of the present invention. Alternatively, in another embodiment of the present invention, it is 5%. Further, in still another embodiment of the present invention, it is 10%. Furthermore, in still another embodiment of the present invention, it is 15%. Furthermore, in another embodiment of the present invention, it is 20%. Furthermore, in another embodiment of the present invention, it is 25%.

Further, the upper limit of the preferable content is, for example, 50% in another embodiment of the present invention with respect to the total amount of the liquid crystal composition of the present invention. Furthermore, in still another embodiment of the present invention, it is 45%. Furthermore, in still another embodiment of the present invention, it is 40%. Furthermore, in another embodiment of the present invention, it is 35%. Furthermore, in another embodiment of the present invention, it is 30%. Furthermore, in still another embodiment of the present invention, it is 25%.

The range of the preferable content is, for example, 3 to 25% in one embodiment of the present invention with respect to the total amount of the liquid crystal composition of the present invention. Alternatively, in another embodiment of the present invention, it is 5 to 30%. Further, in still another embodiment of the present invention, it is 10 to 35%. Furthermore, in still another embodiment of the present invention, it is 15 to 40%. Furthermore, in another embodiment of the present invention, it is 20 to 45%. Furthermore, in another embodiment of the present invention, it is 25 to 50%.

Further, the preferred content range is, for example, 50 to 35% in another embodiment of the present invention with respect to the total amount of the liquid crystal composition of the present invention. Furthermore, in still another embodiment of the present invention, 45~30%. Furthermore, in still another embodiment of the present invention, it is 40 to 25%. Furthermore, in another embodiment of the present invention, it is 35 to 20%. Furthermore, in another embodiment of the present invention, it is 30 to 15%. Furthermore, in another embodiment of the present invention, it is 25 to 10%.

When the viscosity of the liquid crystal composition of the present invention is kept low and a liquid crystal composition having a high response speed is required, it is preferable that the lower limit value is higher and the upper limit value is higher. In addition, when the liquid crystal composition of the liquid crystal composition of the present invention is kept high and a liquid crystal composition having good temperature stability is required, it is preferable that the lower limit value is higher and the upper limit value is higher. Further, in order to increase the dielectric anisotropy in order to maintain a low driving voltage, it is preferable to lower the above-described lower limit value and the upper limit value is lower.

Further, the compound represented by the formula (L) is preferably a compound selected from the group of compounds represented by the formula (I) to the formula (V). (wherein R ⁹¹ to R ^9a 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, but the general formula (I) In the formula, R ⁹¹ represents an alkyl group having 3 carbon atoms, and R ⁹² represents a compound of an alkyl group having 2 carbon atoms.

Containing a compound group represented by the general formula (I) to the general formula (V) When the selected compound is used, it preferably contains one to ten kinds, more preferably one to eight kinds, particularly preferably one to five kinds, and more preferably two or more kinds of compounds. It is preferably 5 to 40% by mass, more preferably 5 to 35% by mass, and particularly preferably 7 to 30% by mass.

R ⁹¹ to R ^9a 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 2 to 10 carbon atoms, more preferably 1 to 5 carbon atoms. An alkyl group, an alkenyl group having 2 to 5 carbon atoms or an alkoxy group having 2 to 5 carbon atoms, and the alkenyl group is preferably a formula (Alkenyl-1) to (Alkenyl-4) described below. (Formula, the structure in which the right end is bonded to the ring structure), when the liquid crystal composition of the present invention contains a reactive monomer, it is preferably represented by the formula (Alkenyl-2) and the formula (Alkenyl-4). The structure is more preferably a structure shown by the formula (Alkenyl-2).

Further, R ⁹¹ and R ⁹² may be the same or different, and preferably represent a different substituent.

Further, the compound represented by the formula (I) is preferably a compound selected from the group of compounds represented by the formula (Ia). (wherein R ¹³ and R ¹⁴ each independently represent an alkyl group having 1 to 5 carbon atoms, and a compound of R ¹³ and R ¹⁴ having a carbon number of 3 and 2 alkyl groups is excluded).

The types of compounds that can be combined are not particularly limited. The combination is performed in accordance with the required properties such as solubility at low temperature, transfer temperature, electrical reliability, and birefringence. The type of the compound to be used is, for example, one type in one embodiment of the present invention. Alternatively, in another embodiment of the present invention, there are two types. Further, in another embodiment of the present invention, it is three or more types.

In the liquid crystal composition of the present invention, the content of the compound represented by the formula (Ia) must be in accordance with solubility at low temperature, transfer temperature, electrical reliability, birefringence, process suitability, dripping marks, cauterization, and intercalation. The required performance such as electrical anisotropy is suitably adjusted. The lower limit of the content of the liquid crystal composition of the present invention is, for example, 3% in one embodiment of the present invention. Alternatively, in another embodiment of the present invention, it is 4%. Further, in another embodiment of the present invention, it is 15%. Furthermore, in still another embodiment of the present invention, it is 25%. Furthermore, in still another embodiment of the present invention, it is 30%. Furthermore, it is 35% in another embodiment of the present invention. Furthermore, in another embodiment of the present invention, it is 38%. Furthermore, in still another embodiment of the present invention, it is 40%. Furthermore, in still another embodiment of the present invention, it is 42%. Furthermore, in another embodiment of the present invention, it is 45%. Furthermore, in still another embodiment of the present invention, it is 47%. Furthermore, in another embodiment of the present invention, it is 50%.

Further, the upper limit of the preferable content is, for example, 60% in one embodiment of the present invention with respect to the total amount of the liquid crystal composition of the present invention. Further, in another embodiment of the present invention, it is 55%. Furthermore, in still another embodiment of the present invention, it is 45%. Furthermore, in still another embodiment of the present invention, it is 40%. Furthermore, in another embodiment of the present invention In the state, it is 30%. Furthermore, in another embodiment of the present invention, it is 20%. Furthermore, in still another embodiment of the present invention, it is 15%.

The range of the preferable content is, for example, 3 to 15% in one embodiment of the present invention with respect to the total amount of the liquid crystal composition of the present invention. Alternatively, in another embodiment of the present invention, it is 4 to 20%. Further, in another embodiment of the present invention, it is 15 to 30%. Furthermore, in another embodiment of the present invention, it is 25 to 40%. Furthermore, in still another embodiment of the present invention, it is 30 to 45%. Furthermore, in another embodiment of the present invention, it is 35 to 55%. Furthermore, in another embodiment of the present invention, it is 38 to 55%. Furthermore, in still another embodiment of the present invention, it is 40 to 55%. Furthermore, in another embodiment of the present invention, it is 42 to 60%. Furthermore, in another embodiment of the present invention, it is 45 to 60%. Furthermore, in still another embodiment of the present invention, it is 47 to 60%. Furthermore, in still another embodiment of the present invention, it is 50 to 60%.

Further, the range of the preferable content is, for example, 60 to 30% in one embodiment of the present invention with respect to the total amount of the liquid crystal composition of the present invention. Further, in another embodiment of the present invention, it is 55 to 30%. Furthermore, in another embodiment of the present invention, it is 45 to 20%. Furthermore, in another embodiment of the present invention, it is 40 to 20%. Furthermore, in still another embodiment of the present invention, it is 30 to 20%. Furthermore, in another embodiment of the present invention, it is 20 to 15%. Furthermore, in another embodiment of the present invention, it is 15 to 10%.

The compound represented by the formula (I-a) is more preferably a compound described below.

Preferred are compounds represented by the formula (I-a-1) and the formula (I-a-2). When it is desired to produce a liquid crystal display element which has a high Tni and can be stably displayed even at a high temperature, the content of the compound represented by the formula (I-a-1) and the formula (I-a-2) is preferably slightly increased.

Further, the compound represented by the formula (I) is preferably a compound selected from the group of compounds represented by the formula (Ib). (wherein R ¹⁸ each independently represents an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms or an alkoxy group having 1 to 5 carbon atoms).

The kind of the compound which can be combined is not particularly limited, and is combined according to the required properties such as solubility at low temperature, transfer temperature, electrical reliability, and birefringence. The type of the compound to be used is, for example, one type in one embodiment of the present invention. Alternatively, in another embodiment of the present invention, there are two types. Further, in still another embodiment of the present invention, it is three or more types.

In the liquid crystal composition of the present invention, the content of the compound represented by the formula (Ib) must be in accordance with solubility at low temperature, transfer temperature, electrical reliability, birefringence, process suitability, dripping marks, cauterization, and intercalation. The required performance such as electrical anisotropy is suitably adjusted. The lower limit of the content of the liquid crystal composition of the present invention is, for example, 2% in one embodiment of the present invention. Alternatively, in another embodiment of the present invention, it is 4%. Moreover, in another embodiment of the present invention The state is 7%. Furthermore, in still another embodiment of the present invention, it is 11%. Furthermore, it is 13% in another embodiment of the present invention. Furthermore, in another embodiment of the present invention, it is 15%. Furthermore, in still another embodiment of the present invention, it is 17%. Furthermore, in still another embodiment of the present invention, it is 20%. Furthermore, in another embodiment of the present invention, it is 25%. Furthermore, in still another embodiment of the present invention, it is 30%. Furthermore, in another embodiment of the present invention, it is 32%. Furthermore, in still another embodiment of the present invention, it is 35%.

Further, the upper limit of the preferable content is, for example, 40% in another embodiment of the present invention with respect to the total amount of the liquid crystal composition of the present invention. Furthermore, in still another embodiment of the present invention, it is 35%. Furthermore, in still another embodiment of the present invention, it is 30%. Furthermore, in another embodiment of the present invention, it is 25%. Furthermore, in another embodiment of the present invention, it is 20%. Furthermore, in still another embodiment of the present invention, it is 15%.

The range of the preferable content is, for example, 2 to 15% in one embodiment of the present invention with respect to the total amount of the liquid crystal composition of the present invention. Alternatively, in another embodiment of the present invention, it is 4 to 15%. Further, in still another embodiment of the present invention, it is 7 to 15%. Furthermore, in still another embodiment of the present invention, it is 11 to 20%. Furthermore, in another embodiment of the present invention, it is 13 to 20%. Furthermore, in another embodiment of the present invention, it is 15 to 25%. Furthermore, in still another embodiment of the present invention, it is 17 to 25%. Furthermore, in still another embodiment of the present invention, it is 20 to 30%. Furthermore, in another embodiment of the present invention, it is 25 to 35%. Furthermore, in another embodiment of the present invention, it is 30 to 40%. Moreover, in the present invention In another embodiment, it is 32 to 40%. Furthermore, in still another embodiment of the present invention, it is 35 to 40%.

Further, the preferred content range is, for example, 40 to 35% in another embodiment of the present invention with respect to the total amount of the liquid crystal composition of the present invention. Furthermore, in still another embodiment of the present invention, it is 35 to 20%. Furthermore, in still another embodiment of the present invention, it is 30 to 15%. Furthermore, in another embodiment of the present invention, it is 25 to 10%. Furthermore, in another embodiment of the present invention, it is 20 to 15%. Furthermore, in still another embodiment of the present invention, it is 15 to 10%.

The compound represented by the formula (I-b) is more preferably a compound described below.

A compound represented by the formula (I-b-2) or the formula (I-b-3) is preferred, and a compound represented by the formula (I-b-3) is particularly preferred.

Further, the compound represented by the formula (I) is preferably a compound selected from the group of compounds represented by the formula (Ic). (wherein R ¹³ represents an alkyl group having 1 to 5 carbon atoms, and R ¹⁵ represents an alkoxy group having 1 to 4 carbon atoms).

The kind of the compound which can be combined is not particularly limited, and is combined according to the required properties such as solubility at low temperature, transfer temperature, electrical reliability, and birefringence. The type of the compound to be used is, for example, one type in one embodiment of the present invention. Alternatively, in another embodiment of the present invention, there are two types. Further, in still another embodiment of the present invention, it is three or more types.

In the liquid crystal composition of the present invention, the content of the compound represented by the formula (Ic) must be in accordance with solubility at low temperature, transfer temperature, electrical reliability, birefringence, process suitability, dripping marks, cauterization, and intercalation. The required performance such as electrical anisotropy is suitably adjusted. The lower limit of the content of the liquid crystal composition of the present invention is, for example, 2% in one embodiment of the present invention. Alternatively, in another embodiment of the present invention, it is 4%. Further, in still another embodiment of the present invention, it is 6%. Furthermore, in still another embodiment of the present invention, it is 10%. Furthermore, in another embodiment of the present invention, it is 15%.

Further, the upper limit of the preferable content is, for example, 40% in one embodiment of the present invention with respect to the total amount of the liquid crystal composition of the present invention. Further, in another embodiment of the present invention, it is 35%. Furthermore, in still another embodiment of the present invention, it is 30%. Furthermore, in still another embodiment of the present invention, it is 25%. Furthermore, in another embodiment of the present invention, it is 20%. Furthermore, in another embodiment of the present invention, it is 15%.

The range of the preferable content is, for example, 2 to 20% in one embodiment of the present invention with respect to the total amount of the liquid crystal composition of the present invention. Alternatively, in another embodiment of the present invention, it is 4 to 25%. Further, in still another embodiment of the present invention, it is 6 to 30%. Furthermore, in this issue In another embodiment of the invention, it is 10 to 35%. Furthermore, in another embodiment of the present invention, it is 15 to 40%.

Further, the range of the preferable content is, for example, 40 to 25% in one embodiment of the present invention with respect to the total amount of the liquid crystal composition of the present invention. Further, in another embodiment of the present invention, it is 35 to 20%. Furthermore, in another embodiment of the present invention, it is 30 to 15%. Furthermore, in still another embodiment of the present invention, it is 25 to 10%. Furthermore, in another embodiment of the present invention, it is 20 to 10%. Furthermore, in another embodiment of the present invention, it is 15 to 5%. When the solubility at a low temperature is emphasized, the effect is high if the content is set slightly, and conversely, when the response speed is emphasized, the effect is high if the content is set slightly. Further, in order to improve the dripping trace or the cauterization property, it is preferred to set the range of the content in the middle.

The compound represented by the formula (I-c) is more preferably a compound described below.

A compound represented by the formula (I-c-1), the formula (I-c-2) or the formula (I-c-3) is preferred.

The liquid crystal composition of the present invention may further contain a compound represented by the formula (I-d-1) having a structure similar to the compound represented by the formula (I).

It is preferred to adjust the content of the compound represented by the formula (Id-1) in accordance with the properties required for solubility at a low temperature, transfer temperature, electrical reliability, birefringence, etc., with respect to the total amount of the liquid crystal composition of the present invention. The amount of the compound is preferably 11% by mass or more and 32% by mass or less, more preferably 15% by mass or more and 32% by mass or less, and particularly preferably 23% by mass or more and 32% by mass or less, and more preferably It is contained in an amount of 26% by mass or more and 32% by mass or less, and particularly preferably 28% by mass or more and 32% by mass or less.

Further, the compound represented by the formula (I) is preferably a compound selected from the group of compounds represented by the formula (Ie). (wherein R ¹⁶ and R ¹⁷ each independently represent an alkenyl group having 2 to 5 carbon atoms).

The type of the compound which can be combined is not particularly limited, and it is preferably one type to three or more types in combination with properties required for solubility at low temperature, transfer temperature, electrical reliability, and birefringence. The content of the compound represented by the formula (Ie) is required to have properties such as solubility at low temperature, transfer temperature, electrical reliability, birefringence, process suitability, dropping trace, cauterization, dielectric anisotropy, and the like. With respect to the total amount of the liquid crystal composition of the present invention, it is preferably 5% by mass or more, more preferably 10% by mass, particularly preferably 15% by mass or more, particularly preferably 20% by mass or more, and particularly preferably It is 25% by mass or more, more preferably 30% by mass or more, more preferably 35% by mass or more, still more preferably 40% by mass or more, more preferably 45% by mass or more, still more preferably 50% by mass or more, particularly preferably 55 mass% or more. Further, the maximum ratio which can be contained is preferably 65 mass% or less, more preferably 60 mass%. The amount is preferably at most 58% by mass, and particularly preferably at most 56% by mass.

The range of the preferable content is preferably 5% by mass or more and 25% by mass or less, more preferably 10% by mass or more and 30% by mass or less, and particularly preferably 15% by mass based on the total amount of the liquid crystal composition of the present invention. % or more and 35 mass% or less, particularly preferably 20% by mass or more and 40% by mass or less, more preferably 25% by mass or more and 45% by mass or less, still more preferably 30% by mass or more and 45% by mass or less, and more preferably 35% by mass or more The mass% or more is 50% by mass or less, more preferably 40% by mass or more and 50% by mass or less, more preferably 45% by mass or more and 56% by mass or less, more preferably 50% by mass or more and 58% by mass or less, and more preferably 55% by mass. The above is 65 mass% or less.

Further, the compound represented by the formula (Ie) is preferably a compound selected from the group of compounds represented by the formula (Ie-1) to the formula (Ie-10), more preferably a formula (Ie-2) or a formula. (Ie-4) and a compound represented by the formula (Ie-7).

Further, the compound represented by the formula (II) is preferably a compound selected from the group of compounds represented by the formula (II-a). (wherein R ¹¹ represents an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms or an alkoxy group having 1 to 4 carbon atoms; and R ¹² represents an alkyl group having 1 to 5 carbon atoms; An alkenyl group having 4 to 5 carbon atoms or an alkoxy group having 1 to 4 carbon atoms).

The kind of the compound which can be combined is not particularly limited, and is combined according to the required properties such as solubility at low temperature, transfer temperature, electrical reliability, and birefringence. The type of the compound to be used is, for example, one type in one embodiment of the present invention. Alternatively, in another embodiment of the present invention, there are two types.

In the liquid crystal composition of the present invention, the content of the compound represented by the formula (II-a) must be in accordance with solubility at low temperature, transfer temperature, electrical reliability, birefringence, process suitability, dripping marks, cauterization. The required performance such as dielectric anisotropy is appropriately adjusted. The lower limit of the content of the liquid crystal composition of the present invention is, for example, 1% in one embodiment of the present invention. Alternatively, in another embodiment of the present invention, it is 5%. Further, in still another embodiment of the present invention, it is 7%. Furthermore, in still another embodiment of the present invention, it is 11%. Furthermore, it is 13% in another embodiment of the present invention. Furthermore, in another embodiment of the present invention, it is 15%. Furthermore, in still another embodiment of the present invention, it is 17%. Furthermore, in still another embodiment of the present invention, it is 20%. Furthermore, in another embodiment of the present invention, it is 25%. Furthermore, in still another embodiment of the present invention, it is 30%. Furthermore, in another embodiment of the present invention, it is 35%. Furthermore, in still another embodiment of the present invention, it is 40%.

Further, the upper limit of the preferable content is, for example, 50% in one embodiment of the present invention with respect to the total amount of the liquid crystal composition of the present invention. Alternatively, in another embodiment of the present invention, it is 40%. Furthermore, in still another embodiment of the present invention, it is 35%. Furthermore, in still another embodiment of the present invention, it is 30%. Furthermore, it is 20% in another embodiment of the present invention. Furthermore, in another embodiment of the present invention, it is 15%. Furthermore, in still another embodiment of the present invention, it is 10%. Furthermore, in still another embodiment of the present invention, it is 8%.

The range of the preferable content is, for example, 1 to 8% in one embodiment of the present invention with respect to the total amount of the liquid crystal composition of the present invention. Alternatively, in another embodiment of the present invention, it is 5 to 10%. Further, in another embodiment of the present invention, it is 7 to 15%. Furthermore, in another embodiment of the present invention, it is 11 to 20%. Furthermore, in still another embodiment of the present invention, it is 13 to 20%. Furthermore, in another embodiment of the present invention, it is 15 to 30%. Furthermore, in another embodiment of the present invention, it is 17 to 30%. Furthermore, in another embodiment of the present invention, it is 20 to 35%. Furthermore, in another embodiment of the present invention, it is 25 to 35%. Furthermore, in another embodiment of the present invention, it is 30 to 40%. Furthermore, in still another embodiment of the present invention, it is 35 to 50%. Furthermore, in another embodiment of the present invention, it is 40 to 50%.

Further, the range of the preferable content is, for example, 50 to 45% in one embodiment of the present invention with respect to the total amount of the liquid crystal composition of the present invention. Further, in another embodiment of the present invention, it is 40 to 35%. Furthermore, in another embodiment of the present invention, it is 35 to 25%. Furthermore, in still another embodiment of the present invention, it is 30 to 23%. Furthermore, in the present invention In one embodiment, it is 20 to 16%. Furthermore, in another embodiment of the present invention, it is 15 to 10%. Furthermore, in still another embodiment of the present invention, it is 10 to 7%. Furthermore, in still another embodiment of the present invention, it is 8 to 4%.

When the solubility at a low temperature is emphasized, the effect is high if the content is set slightly, and conversely, when the response speed is emphasized, the effect is high if the content is set slightly. Further, in order to improve the dripping trace or the cauterization property, it is preferred to set the range of the content in the middle.

The compound represented by the formula (II-a) is more preferably a compound described below.

Further, a compound represented by the formula (II-a-1), the formula (II-a-2), the formula (II-a-3) or the formula (II-a-6) is preferred.

Furthermore, the liquid crystal composition of the present invention may further contain a compound selected from the group consisting of compounds represented by the formula (II-b) having a structure similar to the compound represented by the formula (II). (wherein R ¹¹ represents an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms or an alkoxy group having 1 to 4 carbon atoms; and R ¹² represents an alkyl group having 1 to 5 carbon atoms; An alkenyl group having 4 to 5 carbon atoms or an alkoxy group having 1 to 4 carbon atoms).

The compound represented by the formula (II-b) is preferably 1% by mass or more and 6% by mass or less, more preferably 2% by mass or more and 7% by mass or less, based on the total amount of the liquid crystal composition of the present invention. It is preferably 3% by mass or more and 8% by mass or less, more preferably 4% by mass or more and 9% by mass or less, more preferably 6% by mass or more and 12% by mass or less, still more preferably 8% by mass or more and 15% by mass or less. More preferably, it is 10% by mass or more and 21% by mass or less, more preferably 12% by mass or more and 22% by mass or less, more preferably 15% by mass or more and 24% by mass or less, still more preferably 18% by mass or more and 25% by mass or less. It is 21% by mass or more and 30% by mass or less.

Further, the compound represented by the formula (II-b) is preferably a compound represented by the formula (II-b-1).

Furthermore, the compound represented by the formula (III) is preferably a compound selected from the group of compounds represented by the formula (III-a). (wherein R ¹¹ represents an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms or an alkoxy group having 1 to 4 carbon atoms; and R ¹² represents an alkyl group having 1 to 5 carbon atoms; An alkenyl group having 4 to 5 carbon atoms or an alkoxy group having 1 to 4 carbon atoms).

The kind of the compound which can be combined is not particularly limited, and is combined according to the required properties such as solubility at low temperature, transfer temperature, electrical reliability, and birefringence. The type of the compound to be used is, for example, one type in one embodiment of the present invention. Alternatively, in another embodiment of the present invention, there are two types.

In the liquid crystal composition of the present invention, the content of the compound represented by the formula (III-a) must be in accordance with solubility at low temperature, transfer temperature, electrical reliability, birefringence, process suitability, dripping marks, cauterization. The required performance such as dielectric anisotropy is appropriately adjusted. The lower limit of the content of the liquid crystal composition of the present invention is, for example, 3% in one embodiment of the present invention. Alternatively, in another embodiment of the present invention, it is 5%. Further, in still another embodiment of the present invention, it is 6%. Furthermore, in still another embodiment of the present invention, it is 8%. Furthermore, in another embodiment of the present invention, it is 10%. Furthermore, in another embodiment of the present invention, it is 12%. Furthermore, in still another embodiment of the present invention, it is 15%. Furthermore, in still another embodiment of the present invention, it is 20%. Furthermore, in another embodiment of the present invention, it is 25%. Furthermore, in another embodiment of the present invention, it is 30%.

Further, the upper limit of the preferable content is, for example, 50% in one embodiment of the present invention with respect to the total amount of the liquid crystal composition of the present invention. Further, in another embodiment of the present invention, it is 40%. Furthermore, in still another embodiment of the present invention, it is 35%. Furthermore, in still another embodiment of the present invention, it is 30%. Furthermore, in another embodiment of the present invention, it is 20%. Furthermore, in another embodiment of the present invention, it is 15%. Furthermore, in still another embodiment of the present invention, it is 10%. More, in this In still another embodiment of the invention, it is 5%.

The range of the preferable content is, for example, 3 to 15% in one embodiment of the present invention with respect to the total amount of the liquid crystal composition of the present invention. Alternatively, in another embodiment of the present invention, it is 5 to 15%. Further, in still another embodiment of the present invention, it is 6 to 15%. Furthermore, in still another embodiment of the present invention, it is 8 to 20%. Furthermore, in another embodiment of the present invention, it is 10 to 30%. Furthermore, in another embodiment of the present invention, it is 12 to 30%. Furthermore, in another embodiment of the present invention, it is 15 to 30%. Furthermore, in still another embodiment of the present invention, it is 20 to 35%. Furthermore, in another embodiment of the present invention, it is 25 to 40%. Furthermore, in another embodiment of the present invention, it is 30 to 50%.

Further, the range of the preferable content is, for example, 50 to 40% in one embodiment of the present invention with respect to the total amount of the liquid crystal composition of the present invention. Further, in another embodiment of the present invention, it is 40 to 30%. Furthermore, in another embodiment of the present invention, it is 35 to 25%. Furthermore, in still another embodiment of the present invention, it is 30 to 20%. Furthermore, in another embodiment of the present invention, it is 20 to 15%. Furthermore, in another embodiment of the present invention, it is 15 to 10%. Furthermore, in another embodiment of the present invention, it is 10 to 5%. Furthermore, in still another embodiment of the present invention, it is 5 to 3%.

When a high birefringence is obtained, the effect is high if the content is set slightly, and conversely, when the Tni is high, the effect is high if the content is set slightly. Further, in order to improve the dripping trace or the cauterization property, it is preferred to set the range of the content in the middle.

The compound represented by the formula (III-a) is more preferably a compound described below.

Preferred are compounds represented by formula (III-a-2), formula (III-a-3) or formula (III-a-4).

Further, a compound selected from the group consisting of compounds represented by the formula (III-b) having a structure similar to the compound represented by the formula (III) may be contained. (wherein R ¹¹ represents an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms or an alkoxy group having 1 to 4 carbon atoms; and R ¹² represents an alkyl group having 1 to 5 carbon atoms; An alkenyl group having 4 to 5 carbon atoms or an alkoxy group having 1 to 4 carbon atoms, and X ¹¹ and X ¹² each independently represent a fluorine atom or a hydrogen atom, and any of X ¹¹ or X ¹² is a fluorine atom. ).

The compound represented by the formula (III-b) is preferably 2% by mass or more, more preferably 4% by mass, even more preferably 5% by mass or more, based on the total amount of the liquid crystal composition of the present invention. The amount is preferably 6% by mass or more, more preferably 9% by mass or more, still more preferably 12% by mass or more, more preferably 14% by mass or more, still more preferably 16% by mass or more, still more preferably 18% by mass or more, and more preferably It is preferably 20% by mass or more, and particularly preferably 22% by mass or more. Also, the maximum can be included The ratio is preferably 30% by mass or less, more preferably 25% by mass or less, still more preferably 24% by mass or less, and particularly preferably 23% by mass or less.

The range of the preferable content is preferably 2% by mass or more and 23% by mass or less, more preferably 4% by mass or more and 23% by mass or less, and particularly preferably 5% by mass based on the total amount of the liquid crystal composition of the present invention. % or more and 23% by mass or less, particularly preferably 6% by mass or more and 24% by mass or less, more preferably 9% by mass or more and 25% by mass or less, still more preferably 12% by mass or more and 25% by mass or less, and still more preferably 14% by mass or less. The mass% or more is 25% by mass or less, more preferably 16% by mass or more and 25% by mass or less, more preferably 18% by mass or more and 30% by mass or less, more preferably 20% by mass or more and 30% by mass or less, and particularly preferably 22% by mass or less. The above 30% by mass or less.

Further, the compound represented by the formula (III-b) is preferably a compound represented by the formula (III-b-1).

Furthermore, the compound represented by the formula (IV) is preferably, for example, a compound selected from the group of compounds represented by the formula (IV-a). (R ²⁵ represents an alkyl group having 1 to 5 carbon atoms, and R ²⁴ represents an alkyl group having 1 to 5 carbon atoms).

The kind of the compound which can be combined is not particularly limited, and is combined according to the required properties such as solubility at low temperature, transfer temperature, electrical reliability, and birefringence. The type of the compound to be used is, for example, one type in one embodiment of the present invention. Alternatively, in another embodiment of the present invention, there are two types.

In the liquid crystal composition of the present invention, the content of the compound represented by the formula (IV-a) must be in accordance with solubility at low temperature, transfer temperature, electrical reliability, birefringence, process suitability, dripping marks, cauterization. The required performance such as dielectric anisotropy is appropriately adjusted. The lower limit of the content of the liquid crystal composition of the present invention is, for example, 3% in one embodiment of the present invention. Alternatively, in another embodiment of the present invention, it is 5%. Further, in still another embodiment of the present invention, it is 7%. Furthermore, in still another embodiment of the present invention, 10%. Furthermore, it is 14% in another embodiment of the present invention. Furthermore, in another embodiment of the present invention, it is 16%. Furthermore, in still another embodiment of the present invention, it is 20%. Furthermore, in still another embodiment of the present invention, it is 23%. Furthermore, in another embodiment of the present invention, it is 26%. Furthermore, in still another embodiment of the present invention, it is 30%.

Further, the upper limit of the preferable content is, for example, 50% in one embodiment of the present invention with respect to the total amount of the liquid crystal composition of the present invention. Further, in another embodiment of the present invention, it is 40%. Furthermore, in still another embodiment of the present invention, it is 35%. Furthermore, in still another embodiment of the present invention, it is 30%. Furthermore, it is 20% in another embodiment of the present invention. Furthermore, in another embodiment of the present invention, it is 15%. Furthermore, in still another embodiment of the present invention, it is 10%. Furthermore, in still another embodiment of the present invention, it is 5%.

The range of the preferable content is, for example, 3 to 15% in one embodiment of the present invention with respect to the total amount of the liquid crystal composition of the present invention. Alternatively, in another embodiment of the present invention, it is 5 to 15%. Further, in still another embodiment of the present invention, it is 7 to 15%. Furthermore, in this issue In another embodiment of the invention, it is 10 to 20%. Furthermore, in another embodiment of the present invention, it is 14 to 30%. Furthermore, in another embodiment of the present invention, it is 16 to 30%. Furthermore, in still another embodiment of the present invention, it is 20 to 30%. Furthermore, in still another embodiment of the present invention, it is 23 to 35%. Furthermore, in another embodiment of the present invention, it is 26 to 40%. Furthermore, in another embodiment of the present invention, it is 30 to 50%.

Further, the range of the preferable content is, for example, 50 to 40% in one embodiment of the present invention with respect to the total amount of the liquid crystal composition of the present invention. Further, in another embodiment of the present invention, it is 40 to 30%. Furthermore, in another embodiment of the present invention, it is 35 to 25%. Furthermore, in still another embodiment of the present invention, it is 30 to 20%. Furthermore, in another embodiment of the present invention, it is 20 to 15%. Furthermore, in another embodiment of the present invention, it is 15 to 10%. Furthermore, in another embodiment of the present invention, it is 10 to 5%. Furthermore, in still another embodiment of the present invention, it is 5 to 3%.

The compound represented by the formula (IV-a) is more preferably a compound described below.

A compound represented by the formula (IV-a-2) is preferred.

Further, the compound represented by the formula (IV) is preferably, for example, a compound selected from the group of compounds represented by the formula (IV-b). (R ²⁵ represents an alkyl group having 1 to 5 carbon atoms, and R ²⁶ represents an alkoxy group having 1 to 4 carbon atoms).

The type of the compound which can be combined is not particularly limited, and it is preferably one or three kinds of these compounds in accordance with the required properties such as solubility at low temperature, transfer temperature, electrical reliability, and birefringence. .

The content of the compound represented by the formula (IV-b) is preferably adjusted according to the required properties such as solubility at low temperature, transfer temperature, electrical reliability, and birefringence, and is preferably 1% by mass or more. It is more preferably 4% by mass or more, and particularly preferably 8% by mass or more. Further, the ratio which can be contained at the maximum is preferably 24% by mass or less, more preferably 18% by mass or less, and still more preferably 14% by mass or less.

The range of the preferable content is preferably 1% by mass or more and 14% by mass or less, more preferably 4% by mass or more and 18% by mass or less, and still more preferably 8% by mass or more and 24% by mass or less.

Further, the compound represented by the formula (IV-b) is, for example, preferably a compound represented by the formula (IV-b-1) to the formula (IV-b-4), of which the formula (IV-b is preferred) -3) The compound shown.

Further, the compound represented by the formula (IV) may, for example, be a compound selected from the group of compounds represented by the formula (IV-c). (R ²³ represents an alkenyl group having 2 to 5 carbon atoms, and R ²⁴ represents an alkyl group having 1 to 5 carbon atoms).

The kind of the compound which can be combined is not particularly limited, and is combined according to the required properties such as solubility at low temperature, transfer temperature, electrical reliability, and birefringence. The type of the compound to be used is, for example, one type in one embodiment of the present invention. Alternatively, in another embodiment of the present invention, it is two or more types.

In the liquid crystal composition of the present invention, the content of the compound represented by the formula (IV-c) must be in accordance with solubility at low temperature, transfer temperature, electrical reliability, birefringence, process suitability, dripping marks, cauterization. The required performance such as dielectric anisotropy is appropriately adjusted. The lower limit of the content of the liquid crystal composition of the present invention is, for example, 3% in one embodiment of the present invention. Alternatively, in another embodiment of the present invention, it is 5%. Further, in still another embodiment of the present invention, it is 7%. Furthermore, in still another embodiment of the present invention, it is 10%. Furthermore, it is 14% in another embodiment of the present invention. Furthermore, in another embodiment of the present invention, it is 16%. Furthermore, in still another embodiment of the present invention, it is 20%. Furthermore, in still another embodiment of the present invention, it is 23%. Furthermore, it is 26% in another embodiment of the present invention. Furthermore, in another embodiment of the present invention, it is 30%.

Further, the upper limit of the preferable content is, for example, 50% in one embodiment of the present invention with respect to the total amount of the liquid crystal composition of the present invention. Further, in another embodiment of the present invention, it is 40%. Furthermore, in still another embodiment of the present invention, it is 35%. Furthermore, in still another embodiment of the present invention, it is 30%. Furthermore, in another embodiment of the present invention, it is 20%. Furthermore, in another embodiment of the present invention, it is 15%. Furthermore, in still another embodiment of the present invention, it is 10%. More, in this In still another embodiment of the invention, it is 5%.

The range of the preferable content is, for example, 3 to 15% in one embodiment of the present invention with respect to the total amount of the liquid crystal composition of the present invention. Alternatively, in another embodiment of the present invention, it is 5 to 15%. Further, in still another embodiment of the present invention, it is 7 to 15%. Furthermore, in still another embodiment of the present invention, it is 10 to 20%. Furthermore, in another embodiment of the present invention, it is 14 to 30%. Furthermore, in another embodiment of the present invention, it is 16 to 30%. Furthermore, in another embodiment of the present invention, it is 20 to 30%. Furthermore, in still another embodiment of the present invention, it is 23 to 35%. Furthermore, in another embodiment of the present invention, it is 26 to 40%. Furthermore, in another embodiment of the present invention, it is 30 to 50%.

Further, the range of the preferable content is, for example, 50 to 40% in one embodiment of the present invention with respect to the total amount of the liquid crystal composition of the present invention. Further, in another embodiment of the present invention, it is 40 to 30%. Furthermore, in another embodiment of the present invention, it is 35 to 25%. Furthermore, in still another embodiment of the present invention, it is 30 to 20%. Furthermore, in another embodiment of the present invention, it is 20 to 15%. Furthermore, in another embodiment of the present invention, it is 15 to 10%. Furthermore, in another embodiment of the present invention, it is 10 to 5%. Furthermore, in still another embodiment of the present invention, it is 5 to 3%.

Further, the compound represented by the formula (IV-c) is preferably, for example, a compound represented by the formula (IV-c-1) to the formula (IV-c-3).

According to solubility at low temperature, transfer temperature, electrical reliability The desired properties of the birefringence or the like may contain a compound represented by the formula (IV-c-1) or a compound represented by the formula (IV-c-2), and may contain the formula (IV-c-1). Both the compound shown and the compound represented by the formula (IV-c-2) may be all of the compounds represented by the formula (IV-c-1) to the formula (IV-c-3). The content of the compound represented by the formula (IV-c-1) or the formula (IV-c-2) is preferably 3% by mass, more preferably 5 mass, based on the total amount of the liquid crystal composition of the present invention. % or more is more preferably 7% by mass or more, particularly preferably 9% by mass or more, more preferably 11% by mass or more, still more preferably 12% by mass or more, still more preferably 13% by mass or more, and still more preferably 18% by mass or more. The mass% or more is particularly preferably 21% by mass or more. Further, the ratio which can be contained at the maximum is preferably 40% by mass or less, more preferably 30% by mass or less, and particularly preferably 25% by mass or less.

Further, the content of the content is preferably 3% by mass or more and 25% by mass or less, more preferably 5% by mass or more and 25% by mass or less, still more preferably 7% by mass or more and 25% by mass or less, and particularly preferably 9% by mass or less. % or more and 25% by mass or less, more preferably 11% by mass or more and 25% by mass or less, still more preferably 12% by mass or more and 25% by mass or less, more preferably 13% by mass or more and 25% by mass or less, and still more preferably 18% by mass or less % or more is 30% by mass or less, and particularly preferably 21% by mass or more and 40% by mass or less.

Further, the content of the compound represented by the formula (IV-c-2) is preferably 3% by mass, more preferably 5% by mass or more, and particularly preferably 8 based on the total amount of the liquid crystal composition of the present invention. The mass% or more is particularly preferably 10% by mass or more, more preferably 12% by mass or more, still more preferably 15% by mass or more, still more preferably 17% by mass or more, and still more preferably 19% by mass or more. Further, the ratio which can be contained at the maximum is preferably 40% by mass or less, more preferably 30% by mass or less, and particularly preferably 25% by mass or less.

Further, the preferable content range is preferably 3% by mass or more and 25% by mass or less, more preferably 5% by mass or more and 25% by mass or less, still more preferably 8% by mass or more and 25% by mass or less, and particularly preferably 10% by mass or less. % or more and 25% by mass or less, more preferably 12% by mass or more and 25% by mass or less, still more preferably 15% by mass or more and 30% by mass or less, more preferably 17% by mass or more and 30% by mass or less, and still more preferably 19% by mass or less % or more and 40% by mass or less.

When both the compound represented by the formula (IV-c-1) and the compound represented by the formula (IV-c-2) are contained, the total of the compounds of the two is relative to the total amount of the liquid crystal composition of the present invention. The amount is preferably 15% by mass or more, more preferably 19% by mass or more, particularly preferably 24% by mass or more, and particularly preferably 30% by mass or more. Further, the ratio which can be contained at the maximum is preferably 45% by mass or less, more preferably 40% by mass or less, and still more preferably 35% by mass or less.

Further, the preferred content range is preferably 15% by mass or more and 35% by mass or less, more preferably 19% by mass or more and 40% by mass or less, still more preferably 24% by mass or more and 40% by mass or less, and particularly preferably 30% by mass or less. The above is 45 mass% or less.

Furthermore, the compound represented by the formula (V) is preferably a compound selected from the group of compounds represented by the formula (Va). (R ³¹ represents an alkyl group having 1 to 5 carbon atoms, and R ³² represents an alkyl group having 1 to 5 carbon atoms or an alkoxy group having 1 to 4 carbon atoms).

The compound represented by the formula (V-a) is more preferably a compound described below.

Further, the compound represented by the formula (V) is preferably a compound selected from the group of compounds represented by the formula (Vb). (R ³³ represents an alkenyl group having 2 to 5 carbon atoms, and R ³² each independently represents an alkyl group having 1 to 5 carbon atoms or an alkoxy group having 1 to 4 carbon atoms).

The content is preferably adjusted in accordance with the required properties such as solubility at low temperature, transfer temperature, electrical reliability, and birefringence, and is preferably 4% by mass or more, more preferably 6% by mass or more, and particularly preferably 10% by mass. %the above. Further, the ratio which can be contained at the maximum is preferably 23% by mass or less, more preferably 18% by mass or less, and still more preferably 13% by mass or less.

Further, the content is preferably from 4% by mass to 13% by mass, more preferably from 6% by mass to 18% by mass, even more preferably from 10% by mass to 23% by mass.

The compound represented by the formula (V-b) is preferably, for example, a compound represented by the formula (V-b-1) or the formula (V-b-2).

Further, the compound represented by the formula (V) is preferably a compound selected from the group of compounds represented by the formula (Vc). (R ³¹ represents an alkyl group having 1 to 5 carbon atoms, and R ³⁴ represents an alkoxy group having 1 to 4 carbon atoms).

The content of the compound represented by the formula (Vc) is preferably adjusted according to the required properties such as solubility at low temperature, transfer temperature, electrical reliability, and birefringence, and more preferably 4% by mass or more. It is 6% by mass or more, and more preferably 10% by mass or more. Further, the ratio which can be contained at the maximum is preferably 23% by mass or less, more preferably 18% by mass or less, and still more preferably 13% by mass or less.

Further, the content is preferably from 4% by mass to 13% by mass, more preferably from 6% by mass to 18% by mass, even more preferably from 10% by mass to 23% by mass.

Further, the compound represented by the formula (Vc) is preferably, for example, a compound selected from the group consisting of the compounds represented by the formula (Vc-1) to the formula (Vc-3), particularly preferably the formula (Vc-3). The compound shown.

Further, the compound represented by the formula (L) is preferably, for example, a compound selected from the group of compounds represented by the formula (VI). (R ²¹ and R ²² each independently represent an alkenyl group having 2 to 5 carbon atoms or an alkyl group having 1 to 5 carbon atoms or an alkoxy group having 1 to 4 carbon atoms).

The content of the compound represented by the formula (VI) is preferably adjusted according to the required properties such as solubility at low temperature, transfer temperature, electrical reliability, and birefringence, and is preferably 4% by mass or more. It is 8% by mass or more, and particularly preferably 12% by mass or more. Also, the maximum ratio that can be contained is The amount is preferably 24% by mass or less, more preferably 18% by mass or less, and particularly preferably 14% by mass or less.

Further, the content is preferably from 4% by mass to 14% by mass, more preferably from 8% by mass to 18% by mass, even more preferably from 12% by mass to 24% by mass.

Furthermore, the compound represented by the formula (VI) is preferably a compound represented by the formula (VI-1) and the formula (VI-2), for example.

The content of the compound represented by the formula (VI) is preferably adjusted according to the required properties such as solubility at low temperature, transfer temperature, electrical reliability, and birefringence, and more preferably 4% by mass or more. It is 8 mass% or more, and more preferably 12 mass% or more. Further, the ratio which can be contained at the maximum is preferably 24% by mass or less, more preferably 18% by mass or less, and still more preferably 14% by mass or less.

Further, the content is preferably from 4% by mass to 14% by mass, more preferably from 8% by mass to 18% by mass, even more preferably from 12% by mass to 24% by mass.

Further, the compound represented by the formula (L) is preferably, for example, a compound selected from the group of compounds represented by the formula (VII). (R ²¹ and R ²² each independently represent an alkenyl group having 2 to 5 carbon atoms, an alkyl group having 1 to 5 carbon atoms or an alkoxy group having 1 to 4 carbon atoms).

May contain only 1 of these compounds, or 2 More than one type, but it is preferable to suitably combine according to the required performance. The type of the compound which can be combined is not particularly limited, and it is preferably one or two types of these compounds, which are required to have properties such as solubility at low temperature, transfer temperature, electrical reliability, and birefringence. It is particularly good to contain one to three species.

The content of the compound represented by the formula (VII) is preferably 1% by mass or more, more preferably 2% by mass or more, and particularly preferably 3% by mass or more, based on the total amount of the liquid crystal composition of the present invention. It is particularly preferably 4% by mass or more, and particularly preferably 5% by mass or more. Further, the ratio which can be contained at the maximum is preferably 15% by mass or less, more preferably 12% by mass or less, and still more preferably 7% by mass or less.

Further, the preferred range of the content is preferably 1% by mass or more and 7% by mass or less, more preferably 2% by mass or more and 7% by mass or less, still more preferably 3% by mass or more and 12% by mass or less, and particularly preferably 4% by mass or less. The above 12% by mass or less is particularly preferably 5% by mass or more and 15% by mass or less.

Further, the compound represented by the formula (VII) is, for example, preferably a compound represented by the formula (VII-1) to the formula (VII-5), particularly preferably a formula (VII-2) or/and a formula (VII-). 5) Compounds shown.

Furthermore, the compound represented by the formula (L) is preferably a compound selected from the group represented by the formula (VIII). (wherein R ⁵¹ and R ⁵² each independently represent an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms or an alkoxy group having 1 to 4 carbon atoms; and each of A ⁵¹ and A ⁵² Independently represents 1,4-cyclohexylene or 1,4-phenylene, Q ⁵ represents a single bond or -COO-, and X ⁵¹ and X ⁵² each independently represent a fluorine atom or a hydrogen atom. X ⁵¹ and X ^{52 are} different. When it is a fluorine atom).

The kind of the compound which can be combined is not particularly limited, and is combined according to the required properties such as solubility at low temperature, transfer temperature, electrical reliability, and birefringence. The type of the compound to be used is, for example, one type in one embodiment of the present invention. Alternatively, in another embodiment of the present invention, there are two types. Furthermore, in still another embodiment of the present invention, there are three types. Furthermore, in still another embodiment of the present invention, there are four types.

The lower limit of the content of the preferred content is, for example, 2% in one embodiment with respect to the total amount of the liquid crystal composition of the present invention. Furthermore, in another embodiment of the present invention, it is 4%. Furthermore, in still another embodiment of the present invention, it is 7%. Furthermore, in still another embodiment of the present invention, it is 10%. Furthermore, in another embodiment of the present invention, it is 12%. Furthermore, in still another embodiment of the present invention, it is 15%. Furthermore, in still another embodiment of the present invention, it is 17%. Furthermore, in another embodiment of the present invention, it is 18%. Moreover, in another embodiment of the present invention, 20%. Furthermore, in still another embodiment of the present invention, it is 22%.

Further, the upper limit of the preferable content is, for example, 40% in the total amount of the liquid crystal composition of the present invention in one embodiment of the present invention. Furthermore, in another embodiment of the present invention, it is 30%. Furthermore, in still another embodiment of the present invention, it is 25%. Furthermore, in still another embodiment of the present invention, it is 20%. Furthermore, in another embodiment of the present invention, it is 15%. Furthermore, in another embodiment of the present invention, it is 10%. Furthermore, in still another embodiment of the present invention, it is 5%. Furthermore, in still another embodiment of the present invention, it is 4%.

The range of the preferable content is, for example, 2 to 10% in one embodiment with respect to the total amount of the liquid crystal composition of the present invention. Furthermore, in another embodiment of the present invention, it is 4 to 10%. Furthermore, in still another embodiment of the present invention, it is 7 to 15%. Furthermore, in still another embodiment of the present invention, it is 10 to 20%. Furthermore, in another embodiment of the present invention, it is 12 to 20%. Furthermore, in another embodiment of the present invention, it is 15 to 25%. Furthermore, in still another embodiment of the present invention, it is 17 to 30%. Furthermore, in still another embodiment of the present invention, it is 18 to 30%. Furthermore, in another embodiment of the present invention, it is 20 to 30%. Furthermore, in another embodiment of the present invention, it is 22 to 40%.

Further, the range of the preferable content is, for example, 40 to 30% based on the total amount of the liquid crystal composition of the present invention in one embodiment of the present invention. Furthermore, in another embodiment of the present invention, it is 30 to 25%. Furthermore, in still another embodiment of the present invention, it is 25 to 20%. Furthermore, in still another embodiment of the present invention, it is 20 to 15%. Furthermore, in another embodiment of the present invention, it is 15 to 10%. Furthermore, another embodiment of the present invention In the form of application, it is 10 to 5%. Furthermore, in still another embodiment of the present invention, it is 5 to 4%. Furthermore, in still another embodiment of the present invention, it is 4 to 3%.

Furthermore, the compound represented by the formula (VIII) is preferably a compound represented by the formula (VIII-a). (wherein R ⁵¹ and R ⁵² each independently represent an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms or an alkoxy group having 1 to 4 carbon atoms).

The total amount of the liquid crystal composition of the present invention is preferably 1% by mass or more based on the compound represented by the formula (VIII-a), more preferably 2% by mass or more, and particularly preferably 3% by mass. More than or equal to %, particularly preferably 4% by mass or more. Further, the ratio which can be contained at the maximum is preferably 15% by mass or less, more preferably 10% by mass or less, and still more preferably 8% by mass or less.

In addition, the range of the content of the liquid crystal composition of the present invention is preferably 1% by mass or more and 8% by mass or less, more preferably 2% by mass or more and 10% by mass or less, based on the total amount of the liquid crystal composition of the present invention. In particular, it is preferably 3% by mass or more and 10% by mass or less, and particularly preferably 4% by mass or more and 15% by mass or less.

Furthermore, the compound represented by the formula (VIII-a) is preferably a compound represented by the formula (VIII-a-1) to the formula (VIII-a-4), more preferably a formula (VIII-a-2). The compound shown.

Further, the compound represented by the formula (VIII) is preferably a compound represented by the formula (VIII-b). (wherein R ⁵¹ and R ⁵² each independently represent an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms or an alkoxy group having 1 to 4 carbon atoms).

The kind of the compound which can be combined is not particularly limited, and is combined according to the required properties such as solubility at low temperature, transfer temperature, electrical reliability, and birefringence. The type of the compound to be used is, for example, one type in one embodiment of the present invention. Alternatively, in another embodiment of the present invention, there are two types. Furthermore, in another embodiment of the present invention, it is three or more types.

The total amount of the liquid crystal composition of the present invention is preferably 2% by mass or more of the compound represented by the formula (VIII-b), more preferably 4% by mass or more, and particularly preferably 7% by mass. More than or equal to 100% by mass. Further, the ratio which can be contained at the maximum is preferably 16% by mass or less, more preferably 13% by mass or less, and still more preferably 11% by mass or less.

The content of the preferable content is preferably 2% by mass or more and 11% by mass or less, more preferably 4% by mass or more and 13% by mass or less, more preferably 7% by mass or more and 16% by mass or less, and particularly preferably 8% by mass or less. % or more and 16% by mass or less.

Further, the compound represented by the formula (VIII-b) is preferably a compound represented by the formula (VIII-b-1) to the formula (VIII-b-3).

Furthermore, the compound represented by the formula (VIII) is preferably a compound represented by the formula (VIII-c). (wherein R ⁵¹ and R ⁵² each independently represent an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms or an alkoxy group having 1 to 4 carbon atoms; and each of X ⁵¹ and X ⁵² The fluorine atom or the hydrogen atom is independently represented. At least one of X ⁵¹ and X ⁵² is a fluorine atom, and at the same time, both are fluorine atoms).

Further, the compound represented by the formula (VIII-c) is preferably a compound represented by the formula (VIII-c-1). (wherein R ⁵¹ and R ⁵² each independently represent an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms or an alkoxy group having 1 to 4 carbon atoms).

The total amount of the liquid crystal composition of the present invention is preferably 1% by mass or more based on the compound represented by the formula (VIII-c-1), more preferably 2% by mass or more, and particularly preferably contained. It is more preferably 3 mass% or more, and particularly preferably 4 mass% or more. Further, the ratio which can be contained at the maximum is preferably 15% by mass or less, more preferably 10% by mass or less, and still more preferably 8% by mass or less.

In addition, the content of the preferable content is preferably 1% by mass or more and 8% by mass or less, more preferably 2% by mass or more and 10% by mass or less, and particularly preferably 3% by mass or more and 10% by mass or less, particularly preferably It is contained in an amount of 4% by mass or more and 15% by mass or less.

Furthermore, the compound represented by the formula (VIII-c-1) is preferably a formula The compound represented by the formula (VIII-c-1-1) to the formula (VIII-c-1-3) is more preferably a compound represented by the formula (VIII-c-1-1).

Further, the compound represented by the formula (VIII-c) is preferably a compound represented by the formula (VIII-c-2). (wherein R ⁵¹ and R ⁵² each independently represent an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms or an alkoxy group having 1 to 4 carbon atoms).

The total amount of the liquid crystal composition of the present invention is preferably 1% by mass or more based on the compound represented by the formula (VIII-c-2), more preferably 2% by mass or more, and particularly preferably contained. It is more preferably 3 mass% or more, and particularly preferably 4 mass% or more. Further, the ratio which can be contained at the maximum is preferably 15% by mass or less, more preferably 10% by mass or less, and still more preferably 8% by mass or less.

In addition, the content of the preferable content is preferably 1% by mass or more and 8% by mass or less, more preferably 2% by mass or more and 10% by mass or less, and particularly preferably 3% by mass or more and 10% by mass or less, particularly preferably It is contained in an amount of 4% by mass or more and 15% by mass or less.

Further, the compound represented by the formula (VIII-c-2) is a compound represented by the formula (VIII-c-2-1) to the formula (VIII-c-2-3). A compound represented by the formula (VIII-c-2-1) is preferred.

Further, the compound represented by the formula (VIII) is preferably a compound represented by the formula (VIII-d). (wherein R ⁵¹ and R ⁵² each independently represent an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms or an alkoxy group having 1 to 4 carbon atoms; and each of X ⁵¹ and X ⁵² Independently represents a fluorine atom or a hydrogen atom, and at the same time, both are fluorine atoms).

The kind of the compound which can be combined is not particularly limited, and is combined according to the required properties such as solubility at low temperature, transfer temperature, electrical reliability, and birefringence. The type of the compound to be used is, for example, one type in one embodiment of the present invention. Alternatively, in another embodiment of the present invention, it is two or more types.

The lower limit of the content of the preferred content is, for example, 2% in one embodiment with respect to the total amount of the liquid crystal composition of the present invention. Furthermore, in another embodiment of the present invention, it is 4%. Furthermore, in still another embodiment of the present invention, it is 7%. Furthermore, in still another embodiment of the present invention, it is 10%. Furthermore, in another embodiment of the present invention, it is 12%. Furthermore, in another embodiment of the present invention, it is 15%. Furthermore, in still another embodiment of the present invention, it is 17%. Furthermore, in the other embodiment of the present invention In the form of the application, it is 18%. Furthermore, in another embodiment of the present invention, it is 20%. Furthermore, in still another embodiment of the present invention, it is 22%.

Further, the upper limit of the preferable content is, for example, 40% in the total amount of the liquid crystal composition of the present invention in one embodiment of the present invention. Furthermore, in another embodiment of the present invention, it is 30%. Furthermore, in still another embodiment of the present invention, it is 25%. Furthermore, in still another embodiment of the present invention, it is 20%. Furthermore, it is 15% in another embodiment of the present invention. Furthermore, in another embodiment of the present invention, it is 10%. Furthermore, in still another embodiment of the present invention, it is 5%. Furthermore, in still another embodiment of the present invention, it is 4%.

Further, the range of the preferable content is, for example, 2 to 10% in one embodiment of the present invention with respect to the total amount of the liquid crystal composition of the present invention. Furthermore, in another embodiment of the present invention, it is 4% to 15%. Furthermore, in still another embodiment of the present invention, it is 7% to 20. Furthermore, in still another embodiment of the present invention, it is 10 to 20%. Furthermore, it is 12 to 25% in another embodiment of the present invention. Furthermore, in another embodiment of the present invention, it is 15 to 25%. Furthermore, in still another embodiment of the present invention, it is 17 to 30%. Furthermore, in still another embodiment of the present invention, it is 18 to 30%. Furthermore, it is 20 to 30% in another embodiment of the present invention. Furthermore, it is 22 to 40% in another embodiment of the present invention.

Further, the range of the preferable content is, for example, 40 to 30% in one embodiment of the present invention with respect to the total amount of the liquid crystal composition of the present invention. Furthermore, in another embodiment of the present invention, it is 30 to 25%. Furthermore, in another embodiment of the present invention, it is 25 to 20%. Furthermore, in still another embodiment of the present invention, it is 20 to 15%. Furthermore, in the present invention In another embodiment, it is 15 to 10%. Furthermore, in another embodiment of the present invention, it is 10 to 5%. Furthermore, in another embodiment of the present invention, it is 5 to 4%. Furthermore, in another embodiment of the present invention, it is 4 to 3%.

When it is desired that the liquid crystal composition of the present invention has a high Tni embodiment, it is preferred that the content of the compound represented by the formula (VIII-d) be slightly larger. When a low viscosity embodiment is desired, it is preferred to The content is slightly less.

Further, the compound represented by the formula (VIII-d) is preferably a compound represented by the formula (VIII-d-1). (wherein R ⁵¹ and R ⁵² each independently represent an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms or an alkoxy group having 1 to 4 carbon atoms).

Further, the compound represented by the formula (VIII-d-1) is preferably a compound represented by the formula (VIII-d-1-1) to the formula (VIII-d-1-4), more preferably a formula ( a compound represented by VIII-d-1-1) or / and formula (VIII-d-1-2).

Furthermore, the compound represented by the formula (VIII-d) is preferably a compound represented by the formula (VIII-d-2). (wherein R ⁵¹ and R ⁵² each independently represent an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms or an alkoxy group having 1 to 4 carbon atoms).

Further, the compound represented by the formula (VIII-d-2) is preferably a compound represented by the formula (VIII-d-2-1) to the formula (VIII-d-2-4), more preferably a formula ( a compound represented by VIII-d-2-1) or / and formula (VIII-d-2-2).

The liquid crystal composition of the present invention may further contain one or more kinds of compounds represented by the formula (IX-a). (wherein R ⁶¹ and R ⁶² each independently represent 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 type of the compound which can be combined is not particularly limited, and it is preferable to contain one to three kinds of these compounds in accordance with the required properties such as solubility at low temperature, transfer temperature, electrical reliability, and birefringence. It is more preferable to contain one type to four types, and particularly preferably one type to five types or more. Further, the ratio which can be contained at the maximum is preferably 35% by mass or less, more preferably 25% by mass or less, and still more preferably 15% by mass or less.

Further, the preferable content range is preferably 25% by mass or more and 35% by mass or less, more preferably 15% by mass or more and 25% by mass or less, and still more preferably 5% by mass or more and 15% by mass or less.

The compound represented by the formula (IX-a) can be suitably used, as specifically, the compounds listed below.

The liquid crystal composition of the present invention may further contain one or more types of compounds represented by the formula (IX-b). (wherein R ⁷¹ and R ⁷² each independently represent 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 4 to 10 carbon atoms) .

The type of the compound which can be combined is not particularly limited, and it is preferable to contain one to three kinds of these compounds in accordance with the required properties such as solubility at low temperature, transfer temperature, electrical reliability, and birefringence. It is more preferable to contain one type to four types, and particularly preferably one type to five types or more. Further, the ratio which can be contained at the maximum is preferably 35% by mass or less, more preferably 25% by mass or less, and still more preferably 15% by mass or less.

Furthermore, the preferred content is preferably in the range of 25% by mass or more. It is 35 mass% or less, more preferably 15 mass% or more and 25 mass% or less, and particularly preferably 5% by mass or more and 15% by mass or less.

The compound represented by the formula (IX-b) can be suitably used as the compound exemplified below.

The 1,4-cyclohexyl group in the present case is preferably a trans-1,4-cyclohexyl group.

The liquid crystal composition of the present invention preferably contains one or two or more types of compounds selected from the group represented by the general formula (X). (wherein R ^X1 and R ^X2 independently of each other 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; The presence of one methylene group or two or more methylene groups which are not adjacent may be substituted with -O- or -S-, and one or more hydrogen atoms present in the groups may be Substituting into a fluorine atom or a chlorine atom, u and v independently of each other represent 0, 1 or 2, and u+v is 2 or less, and M ^X1 , M ^X2 and M ^{X3 are} independently selected from (a) trans-1, 4-cyclohexylene (one methylene group present in this group or two or more methylene groups not adjacent to each other may be substituted with -O- or -S-), (b) 1,4-phenylene group a group in the group consisting of one -CH= or two or more non-contiguous -CH= can be substituted into -N=), the above-mentioned group (a) or group (b) Each of the hydrogen atoms contained in the hydrogen atom may be substituted by a cyano group, a fluorine atom, a trifluoromethyl group, a trifluoromethoxy group or a chlorine atom. When M ^X2 and/or M ^X3 are plural, they may be the same or different. , L ^X1 , L ^X2 and L ^X3 independently of each other represent a single bond, -COO-, -OCO-, -CH ₂ CH ₂ -, -(CH ₂ ) ₄ -, -OCH ₂ -, -CH ₂ O-, -OCF ₂ -, -CF ₂ O-, -CH=CH- or -C≡C-, when L ^X1 and / or L ^X3 are plural, they may be the same or different, X ^X1 and X ^X2 independently of each other represents a trifluoromethyl group, a trifluoromethoxy group or a fluorine atom, but any one represents a fluorine atom; except for the compound represented by the formula (ii-b).

R ^X1 and R ^X2 are preferably a linear alkyl group having 1 to 5 carbon atoms and a linear carbon number of 1 to 4 when the ring to which the ring is bonded is a phenyl group (aromatic). (or more) alkoxy group and alkenyl group having 4 to 5 carbon atoms, wherein the ring to which the bond is bonded is cyclohexane, pyran and In the case of a saturated ring structure such as an alkane, a linear alkyl group having 1 to 5 carbon atoms, a linear alkoxy group having 1 to 4 (or more) carbon atoms, and a linear carbon are preferable. An alkenyl group having 2 to 5 atoms.

When the improvement of the response speed of the display element is emphasized, the alkenyl group is preferred, and when reliability such as voltage holding ratio is emphasized, the alkyl group is preferred. The alkenyl group is preferably a formula (Alkenyl-1) to (Alkenyl-4) described below. (The formula in which the right end is bonded to the ring structure). When the liquid crystal composition of the present invention contains a reactive monomer, it is preferably represented by the formula (Alkenyl-2) and the formula (Alkenyl-4). The structure is more preferably a structure shown by the formula (Alkenyl-2).

When the chemical stability of the liquid crystal composition is required, the compound represented by the formula (X) preferably has no sulfur atom, nitrogen atom, ester group, cyano group or chlorine atom in its molecule.

The kind of the compound which can be combined is not particularly limited, and it is suitably used in combination according to the desired properties such as solubility at low temperature, transfer temperature, electrical reliability, and birefringence. The type of the compound to be used is, for example, one type in one embodiment of the present invention. Alternatively, in another embodiment of the present invention, there are two types. Further, in still another embodiment of the present invention, there are three types. Furthermore, in still another embodiment of the present invention, there are four types. Furthermore, in another embodiment of the present invention, there are five types. Furthermore, in another embodiment of the present invention, there are six types. Furthermore, in another embodiment of the present invention, there are seven types. Furthermore, in still another embodiment of the present invention, there are eight types. Furthermore, in another embodiment of the present invention, there are nine types. Furthermore, in another embodiment of the present invention, it is 10 or more types.

In the liquid crystal composition of the present invention, the content of the compound represented by the formula (X) must be in accordance with solubility at low temperature, transfer temperature, electrical reliability, birefringence, process suitability, dripping marks, cauterization, and intercalation. The required performance such as electrical anisotropy is suitably adjusted.

The lower limit of the content of the liquid crystal composition of the present invention is, for example, 5% in one embodiment of the present invention. Alternatively, in another embodiment of the present invention, it is 10%. Further, in still another embodiment of the present invention, it is 20%. Furthermore, in still another embodiment of the present invention, it is 30%. Furthermore, in another embodiment of the present invention, it is 40%. Furthermore, in another embodiment of the present invention, it is 50%. Furthermore, in still another embodiment of the present invention, it is 55%. Furthermore, in still another embodiment of the present invention, it is 60%. Furthermore, it is 65% in another embodiment of the present invention. Furthermore, in another embodiment of the present invention, it is 70%.

Further, the upper limit of the preferable content is, for example, 75% in another embodiment of the present invention with respect to the total amount of the liquid crystal composition of the present invention. Furthermore, in still another embodiment of the present invention, it is 65%. Furthermore, in still another embodiment of the present invention, it is 55%. Furthermore, in another embodiment of the present invention, it is 45%. Furthermore, in another embodiment of the present invention, it is 35%. Furthermore, in still another embodiment of the present invention, it is 25%.

The range of the preferable content is, for example, 5 to 25% in one embodiment of the present invention with respect to the total amount of the liquid crystal composition of the present invention. Alternatively, in another embodiment of the present invention, it is 10 to 35%. Further, in still another embodiment of the present invention, it is 20 to 45%. Furthermore, in this In still another embodiment of the invention, it is 30 to 55%. Furthermore, in another embodiment of the present invention, it is 40 to 65%. Furthermore, in another embodiment of the present invention, it is 50 to 75%. Furthermore, in still another embodiment of the present invention, it is 55 to 75%. Furthermore, in still another embodiment of the present invention, it is 60 to 75%. Furthermore, in another embodiment of the present invention, it is 65 to 75%. Furthermore, in another embodiment of the present invention, it is 70 to 75%.

Further, the range of the preferable content is, for example, 75 to 45% in another embodiment of the present invention with respect to the total amount of the liquid crystal composition of the present invention. Furthermore, in still another embodiment of the present invention, it is 65 to 50%. Furthermore, in still another embodiment of the present invention, it is 55 to 40%. Furthermore, in another embodiment of the present invention, it is 45 to 30%. Furthermore, in another embodiment of the present invention, it is 35 to 20%. Furthermore, in another embodiment of the present invention, it is 25 to 15%.

When the viscosity of the liquid crystal composition of the present invention is kept low and a liquid crystal composition having a high response speed is required, it is preferable that the lower limit value is higher and the upper limit value is higher. In addition, when the liquid crystal composition of the liquid crystal composition of the present invention is kept high and a liquid crystal composition having good temperature stability is required, it is preferable that the lower limit value is higher and the upper limit value is higher. Further, in order to increase the dielectric anisotropy in order to maintain a low driving voltage, it is preferable to lower the above-described lower limit value and the upper limit value is lower.

Further, the compound represented by the formula (X) is preferably a compound represented by the formula (XI). (Wherein, R ^X1 represents general formula (X) in ^{the X1} same meaning as R, M ^X1 represents formula (X) in the same meaning as M ^X1, R ^X2 represents general formula (X) wherein R ^{X2 has the} same meaning).

The lower limit of the preferable content in the case of containing the compound represented by the formula (XI) is, for example, 1% in one embodiment of the present invention with respect to the total amount of the liquid crystal composition of the present invention. Alternatively, in another embodiment of the present invention, it is 7%. Alternatively, in still another embodiment of the present invention, it is 10%. Further, in still another embodiment of the present invention, it is 11%. Further, in another embodiment of the present invention, it is 14%. Further, in another embodiment of the present invention, it is 20%. Furthermore, in still another embodiment of the present invention, it is 30%. Furthermore, in still another embodiment of the present invention, it is 40%. Furthermore, in another embodiment of the present invention, it is 50%.

Further, the upper limit of the preferable content is, for example, 55% in another embodiment of the present invention with respect to the total amount of the liquid crystal composition of the present invention. Furthermore, in still another embodiment of the present invention, it is 45%. Furthermore, in still another embodiment of the present invention, it is 35%. Furthermore, in another embodiment of the present invention, it is 30%. Furthermore, in another embodiment of the present invention, it is 25%. Furthermore, in still another embodiment of the present invention, it is 20%.

When the compound represented by the formula (XI) is contained, the preferred content is preferably in the range of 5 to 35% by mass, more preferably 7 to 25% by mass, still more preferably 11 to 21% by mass, particularly preferably Contains 13 to 16% by mass.

In the formula (XI), R ^X1 preferably represents an alkyl group having 1 to 8 carbon atoms or an alkenyl group having 2 to 8 carbon atoms, more preferably an alkyl group having 1 to 8 carbon atoms, and particularly preferably a carbon atom. The alkyl group having 3 to 5 is particularly preferably an alkyl group having 3 or 5 carbon atoms, preferably a straight chain, preferably a linear chain.

In the formula (XI), R ^X2 preferably represents an alkyl group having 1 to 8 carbon atoms, an alkenyl group having 2 to 8 carbon atoms, an alkoxy group having 1 to 8 carbon atoms or a carbon number of 2 to 8. The alkenyloxy group preferably represents an alkyl group having 1 to 8 carbon atoms or an alkoxy group having 1 to 8 carbon atoms, and particularly preferably an alkyl group having 3 to 5 carbon atoms or an alkoxy group having 2 to 4 carbon atoms. The group particularly preferably represents an alkyl group having 3 or 5 carbon atoms or an alkoxy group having 2 or 4 carbon atoms, and more preferably an alkoxy group having 2 or 4 carbon atoms, and is preferably a straight chain.

When the improvement of the response speed of the display element is emphasized, the alkenyl group is preferred, and when reliability such as voltage holding ratio is emphasized, the alkyl group is preferred.

The kind of the compound which can be combined is not particularly limited, and it is suitably used in combination according to the desired properties such as solubility at low temperature, transfer temperature, electrical reliability, and birefringence. The type of the compound to be used is, for example, one type in one embodiment of the present invention. Alternatively, in another embodiment of the present invention, there are two types. Further, in still another embodiment of the present invention, there are three types. Furthermore, in still another embodiment of the present invention, there are four types. Furthermore, in another embodiment of the present invention, it is five or more types.

The compound represented by the formula (XI) may be used alone or in combination of two or more. More preferably, three or more compounds are used. When two or more compounds represented by the formula (XI) are used, it is preferred that the combination R ^X1 represents an alkyl group having 3 to 5 carbon atoms and R ^X2 represents an alkoxy group having 2 to 4 carbon atoms. When a compound of the formula (XI) is used in combination with another compound represented by the formula (XI), R ^X1 represents an alkyl group having 3 to 5 carbon atoms and R ^X2 represents 2 to 2 carbon atoms. The content of the compound of the formula (XI) of the alkoxy group of 4 is preferably 50% by mass or more, more preferably 70% by mass or more, and particularly preferably 80% by mass or more based on the compound represented by the formula (XI). . The preferred range is preferably 50% by mass or more and 70% by mass or less, more preferably 70% by mass or more and 80% by mass or less, and still more preferably 80% by mass or more and 100% by mass or less.

In the formula (XI), M ^X1 represents 1,4-cyclohexylene, 1,4-phenylene or tetrahydropyran-2,5-diyl, when M ^X1 represents 1,4-phenylene One or more hydrogen atoms in the 1,4-phenylene group may be substituted with a fluorine atom, preferably a 1,4-cyclohexylene group or a 1,4-phenylene group, more specifically using the invention. In the display element and the liquid crystal display produced by the liquid crystal composition, when the response speed is emphasized, it is preferable to express 1,4-phenylene. When the operating temperature range is emphasized, a high operating temperature range is required (T _ni is high). Preferably, it represents a 1,4-cyclohexylene group, and when it represents a 1,4-phenylene group, one or more hydrogen atoms in the benzene ring may be substituted with fluorine, but it is preferably unsubstituted, 1 substituted. Or 2 substituted, more preferably unsubstituted. When 2 is substituted, it preferably represents 2,3-difluoro-1,4-phenylene.

The compound represented by the formula (XI) is specifically preferably the formula (XI-1) and/or the formula (XI-2) described below. (wherein R ^X11 , R ^X21 , R ^X12 and R ^X22 each independently represent an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms, an alkoxy group having 1 to 5 carbon atoms or carbon A compound selected from the group consisting of alkenyloxy groups having 2 to 5 atoms.

When R ^X21 , R ^X12 and R ^X22 are alkenyl groups, the number of carbon atoms is preferably from 4 to 5. R ^{X11 is} preferably an alkyl group or an alkenyl group, more preferably an alkyl group, and R ^X21 and R ^{X22 are} preferably an alkyl group or an alkoxy group. When the absolute value of Δ ε is increased, an alkoxy group or an oxy group is preferred. More preferably, it is an alkoxy group, and R ^{X12 is} preferably an alkyl group or an alkenyl group, more preferably an alkyl group.

The compound represented by the formula (XI) is specifically preferably a compound represented by the formula (XI-1-1) to the formula (XI-2-4) described below.

More preferably, it is a compound represented by the formula (XI-1-1) to the formula (XI-1-4), the formula (XI-2-1), and the formula (XI-2-2), and more preferably the formula (XI- 1-1), a compound represented by the formula (XI-1-3), the formula (XI-2-1), and the formula (XI-2-2), particularly preferably a formula (XI-1-1), a formula ( XI-1-3) and the compound represented by the formula (XI-2-1), if stated more specifically, when the value of the refractive index anisotropy Δn required for the liquid crystal composition of the present invention is relatively low ( Preferably, the compound represented by the formula (XI-1-1) and the formula (XI-1-3) is preferably less than about 0.100 when the value of the refractive index anisotropy Δn required is relatively high (about 0.100). In the above), the compound represented by the formula (XI-2-1) is the most preferable. When the compound represented by the formula (XI) has an alkenyl group, it is specifically preferably a formula (XI-1-10) to a formula (XI-2-11) described below. (wherein R ^X22 represents a compound selected from the group represented by R ^X22 in the formula (XI-2)).

Further, the compound represented by the formula (X) is preferably a compound represented by the formula (XII). (Wherein, R ^X1 represents general formula (X) in ^{the X1} same meaning as R, M ^X2 represents the formula (X) in the same meaning as M ^X2, R ^X2 represents general formula (X) wherein R ^{X2 has the} same meaning).

The lower limit of the preferred content when the compound represented by the formula (XII) is contained, relative to the total amount of the liquid crystal composition of the present invention, As in one embodiment of the present invention, it is 1%. Alternatively, in another embodiment of the present invention, it is 5%. Alternatively, in still another embodiment of the present invention, it is 10%. Further, in still another embodiment of the present invention, it is 11%. Further, in another embodiment of the present invention, it is 14%. Further, in another embodiment of the present invention, it is 20%. Furthermore, in still another embodiment of the present invention, it is 30%. Furthermore, in still another embodiment of the present invention, it is 40%.

Further, the upper limit of the preferable content is, for example, 55% in another embodiment of the present invention with respect to the total amount of the liquid crystal composition of the present invention. Furthermore, in still another embodiment of the present invention, it is 45%. Furthermore, in still another embodiment of the present invention, it is 35%. Furthermore, in another embodiment of the present invention, it is 30%. Furthermore, in another embodiment of the present invention, it is 25%. Furthermore, in still another embodiment of the present invention, it is 20%. Furthermore, in still another embodiment of the present invention, it is 15%.

Further, the range of the preferable content is, for example, 1 to 15% in one embodiment of the present invention with respect to the total amount of the liquid crystal composition of the present invention. Alternatively, in another embodiment of the present invention, it is 5 to 20%. Alternatively, in another embodiment of the present invention, it is 10 to 25%. Further, in still another embodiment of the present invention, it is 11 to 25%. Further, in another embodiment of the present invention, it is 14 to 30%. Further, in another embodiment of the present invention, it is 20 to 35%. Furthermore, in another embodiment of the present invention, it is 30 to 45%. Furthermore, in still another embodiment of the present invention, 40 to 55%.

Further, the upper limit of the preferable content is, for example, 55 to 45% in another embodiment of the present invention with respect to the total amount of the liquid crystal composition of the present invention. Furthermore, in still another embodiment of the present invention, 45~35%. Furthermore, in still another embodiment of the present invention, it is 35 to 25%. Furthermore, in another embodiment of the present invention, it is 30 to 20%. Furthermore, in another embodiment of the present invention, it is 25 to 15%. Furthermore, in another embodiment of the present invention, it is 20 to 10%. Furthermore, in still another embodiment of the present invention, it is 15 to 10%.

In the formula (XII), R ^{X1 is} preferably an alkyl group having 1 to 8 carbon atoms, an alkenyl group having 2 to 8 carbon atoms, an alkoxy group having 1 to 8 carbon atoms or 2 to 8 carbon atoms. More preferably, it is an alkyl group having 1 to 8 carbon atoms or an alkenyl group having 2 to 8 carbon atoms, an alkyl group having 1 to 8 carbon atoms, and particularly preferably a carbon number of 2 to 5. The alkyl group is particularly preferably an alkyl group having 3 to 5 carbon atoms, and is preferably a straight chain.

In the formula (XII), R ^X2 preferably represents an alkyl group having 1 to 8 carbon atoms, an alkenyl group having 2 to 8 carbon atoms, an alkoxy group having 1 to 8 carbon atoms or a carbon number of 2 to 8 More preferably, it is an alkyl group having 1 to 8 carbon atoms or an alkoxy group having 1 to 8 carbon atoms, and particularly preferably an alkyl group having 1 to 5 carbon atoms or 1 to 4 carbon atoms. The alkoxy group is more preferably an alkoxy group having 1 to 4 carbon atoms, particularly preferably an alkoxy group having 2 or 3 carbon atoms, and is preferably a straight chain.

When the improvement of the response speed of the display element is emphasized, the alkenyl group is preferred, and when reliability such as voltage holding ratio is emphasized, the alkyl group is preferred.

The compound represented by the formula (XII) is more preferably a compound represented by the formula (XII-1) or the formula (XII-2). (Wherein, R ^X1 represents general formula (X) in the same meaning as R ^X1, R ^X2 represents general formula (X) in the same meaning as R ^X2).

The compound represented by the formula (XII-1) is specifically preferably the formula (XII-1-1) to (XII-1-6) described below. The compound shown is more preferably a compound represented by the formula (XII-1-1) to the formula (XII-1-4), and more preferably a compound of the formula (XII-1-1) to (XII-1-3). The compound shown is particularly preferably a compound represented by the formula (XII-1-1) and the formula (XII-1-3).

When the compound represented by the formula (XII-1) has an alkenyl group, specifically, the formula (XII-1-10) to (XII-1-13) described below is preferred. (wherein R ^X2 represents a compound represented by the same meaning as R ^X2 in the formula (X)).

The compound represented by the formula (XII-2) is specifically preferably the formula (XII-2-1) to (XII-2-6) described below. The compound shown is more preferably a compound represented by the formula (XII-2-1) to the formula (XII-2-4), and particularly preferably a formula (XII-2-1) to a formula (XII-2-3). The compound shown is particularly preferably a compound represented by the formula (XII-2-1) and the formula (XII-2-3).

When the compound represented by the formula (XII-2) has an alkenyl group, specifically, the formula (XII-2-10) to (XII-2-13) described below is preferred. (wherein R ^X2 represents a compound represented by the same meaning as R ^X2 in the formula (X)).

The kind of the compound which can be combined is not particularly limited, and it is suitably used in combination according to the desired properties such as solubility at low temperature, transfer temperature, electrical reliability, and birefringence. The type of the compound to be used is, for example, one type in one embodiment of the present invention. Alternatively, in another embodiment of the present invention, there are two types. Further, in still another embodiment of the present invention, there are three types. Furthermore, in still another embodiment of the present invention, there are four types. Furthermore, in another embodiment of the present invention, there are five types. Furthermore, in another embodiment of the present invention, there are six types. Furthermore, in another embodiment of the present invention, there are seven types. Furthermore, in still another embodiment of the present invention, there are eight types. Furthermore, in another embodiment of the present invention, there are nine types. Furthermore, in another embodiment of the present invention, it is 10 or more types.

When four or more compounds represented by the formula (XII) are used, it is preferred to use a compound represented by the formula (XII-2-1) to the formula (XII-2-4) in combination, and the formula (XII-2-1) The content of the compound represented by the formula (XII-2-4) is preferably 50% by mass or more, more preferably 70% by mass, based on the compound represented by the formula (XII). The above is particularly preferably 80% by mass or more.

The range of the preferable content is preferably 50% by mass or more and 70% by mass or less, more preferably 70% by mass or more and 80% by mass or less, and particularly preferably 80% by mass or more and 100% by mass or less.

When three kinds of compounds represented by the formula (XII) are used, it is preferred to use a compound represented by the formula (XII-2-1) to the formula (XII-2-3) in combination, and the formula (XII-2-1) The content of the compound represented by the formula (XII-2-3) is preferably 50% by mass or more, more preferably 70% by mass or more, and still more preferably 80% by mass or more based on the compound represented by the formula (XII).

The range of the preferable content is preferably 50% by mass or more and 70% by mass or less, more preferably 70% by mass or more and 80% by mass or less, and particularly preferably 80% by mass or more and 100% by mass or less.

When two kinds of compounds represented by the formula (XII) are used, it is preferred to use a compound represented by the formula (XII-2-1) to the formula (XII-2-2) in combination, and the formula (XII-2-1) The content of the compound represented by the formula (XII-2-2) is preferably 50% by mass or more, more preferably 70% by mass or more, and still more preferably 80% by mass or more based on the compound represented by the formula (XII).

The range of the preferable content is preferably 50% by mass or more and 70% by mass or less, more preferably 70% by mass or more and 80% by mass or less, and particularly preferably 80% by mass or more and 100% by mass or less.

Further, the compound represented by the formula (X) is preferably a compound represented by the formula (XIII). (wherein R ^X1 represents the same meaning as R ^X1 in the formula (X), M ^X31 represents the same meaning as M ^X1 in the formula (X), and R ^X2 represents R in the formula (X) ^{X2 has the} same meaning, W represents 0 or 1, X ³¹ ~ X ³⁶ represents a hydrogen atom or a fluorine atom, a combination of X ³¹ and X ³² , a combination of X ³³ and X ³⁴ , and at least 1 combination of X ³⁵ and X ³⁶ The combination of the groups is a fluorine atom).

The kind of the compound which can be combined is not particularly limited, and it is suitably used in combination according to the desired properties such as solubility at low temperature, transfer temperature, electrical reliability, and birefringence. The type of the compound to be used is, for example, one type in one embodiment of the present invention. Alternatively, in another embodiment of the present invention, there are two types. Further, in still another embodiment of the present invention, there are three types. Furthermore, in still another embodiment of the present invention, there are four types. Furthermore, in another embodiment of the present invention, it is five or more types.

The lower limit of the preferable content in the case of containing the compound represented by the formula (XIII), when the lower limit is present, is, for example, in one embodiment of the present invention, relative to the total amount of the liquid crystal composition of the present invention. 1%. Alternatively, in another embodiment of the present invention, it is 3%. Alternatively, in still another embodiment of the present invention, it is 5%. Further, in still another embodiment of the present invention, it is 8%. Further, in another embodiment of the present invention, it is 10%. Further, in another embodiment of the present invention, it is 12%. Furthermore, in still another embodiment of the present invention, it is 15%. On the other hand, the embodiment in which the lower limit value does not exist is 0%.

Further, the upper limit of the preferable content is, for example, 35% based on the total amount of the liquid crystal composition of the present invention, for example, in another embodiment of the present invention. Furthermore, in still another embodiment of the present invention, it is 30%. Furthermore, in still another embodiment of the present invention, it is 28%. Furthermore, in this In another embodiment of the invention, it is 27%. Furthermore, in another embodiment of the present invention, it is 25%.

The range of the preferable content is, for example, 1 to 25% in one embodiment of the present invention with respect to the total amount of the liquid crystal composition of the present invention. Alternatively, in another embodiment of the present invention, it is 3 to 27%. Alternatively, in another embodiment of the present invention, it is 5 to 27%. Further, in still another embodiment of the present invention, it is 8 to 28%. Further, in another embodiment of the present invention, it is 10 to 30%. Further, in another embodiment of the present invention, it is 12 to 30%. Furthermore, in another embodiment of the present invention, it is 15 to 30%.

Further, the preferred content range is, for example, 35 to 25% in another embodiment of the present invention with respect to the total amount of the liquid crystal composition of the present invention. Furthermore, in another embodiment of the present invention, it is 30 to 20%. Furthermore, in still another embodiment of the present invention, it is 28 to 18%. Furthermore, in another embodiment of the present invention, it is 27 to 15%. Furthermore, in another embodiment of the present invention, it is 25 to 10%.

When the compound represented by the formula (XIII) is contained, it is preferably contained in an amount of from 0 to 30% by mass, more preferably from 0 to 25% by mass.

In the formula (XIII), R ^X1 and R ^X2 each independently represent an alkyl group having 1 to 8 carbon atoms, an alkenyl group having 2 to 8 carbon atoms, an alkoxy group having 1 to 8 carbon atoms or a carbon number. The alkenyloxy group of 2 to 8 preferably represents an alkyl group having 1 to 8 carbon atoms or an alkenyl group having 2 to 8 carbon atoms, more preferably an alkyl group having 1 to 8 carbon atoms, and particularly preferably a carbon number. The alkyl group of 2 to 5 is particularly preferably an alkyl group having 3 to 5 carbon atoms, and the number of carbon atoms of R ¹ and R ² is preferably different from each other, and is preferably linear.

In the formula (XIII), it is preferred that X ³¹ to X ³⁶ each independently represent a hydrogen atom or a fluorine atom, more preferably 2 to 5 represent a fluorine atom, and particularly preferably 2 to 4 represent a fluorine atom, and particularly preferably a fluorine atom. It is 2 to 3 to represent a fluorine atom, and more preferably 2 to represent a fluorine atom.

In this case, when the number of fluorine atoms is two, it is preferred that any two of X ³³ to X ³⁶ represent a fluorine atom, and more preferably, a combination of X ³³ and X ³⁴ represents a fluorine atom, or X ³⁵ and X ³⁶ The combination represents a fluorine atom, and particularly preferably a combination of X ³³ and X ³⁴ represents a fluorine atom. When the number of fluorine atoms is three or more, it is preferred that at least a combination of X ³³ and X ³⁴ represents a fluorine atom, or at least a combination of X ³⁵ and X ³⁶ represents a fluorine atom, more preferably at least a combination of X ³³ and X ³⁴ . All represent fluorine atoms.

In the formula (XIII), M ^X31 preferably represents a 1,4-cyclohexylene group, a 1,4-phenylene group or a tetrahydropyran-2,5-diyl group, which is produced by using the liquid crystal composition. In the display element and the liquid crystal display, when the response speed is emphasized, it is preferably a 1,4-phenylene group or a tetrahydropyran-2,5-diyl group, and more preferably a 1,4-phenylene group. When the driving voltage is emphasized, it preferably represents a 1,4-phenylene group or a tetrahydropyran-2,5-diyl group, more preferably a tetrahydropyran-2,5-diyl group. When the temperature range is re-operated, that is, when a high operating temperature range is required, it preferably represents 1,4-cyclohexylene or tetrahydropyran-2,5-diyl, more preferably 1,4-cyclohexylene. When 1,4-phenylene is represented, one or more hydrogen atoms in the benzene ring may be substituted with a fluorine atom, but is preferably unsubstituted, substituted with 1 or substituted, and when substituted with 2, preferably 2 , 3-difluorobenzene-1,4-diyl.

In the general formula (XIII), W represents 0 or 1. When the response speed is emphasized, it is preferably 0. When the operating temperature range is emphasized, that is, when a high operating temperature range is required, 1 is preferably expressed.

The compound represented by the formula (XIII) is preferably the formula (XIII-1) to (XIII-43) described below.

(Wherein, R ^X1 represents general formula (X) in the same meaning as R ^X1, R ^X2 represents general formula (X) in the same meaning as R ^X2) compound represented by the general formula is preferably (XIII a compound represented by -1) to (XIII-10), (XIII-12), (XIII-20), (XIII-22), (XIII-40) and (XIII-42), more preferably a formula ( Compounds represented by XIII-1), (XIII-2), (XIII-10), (XIII-12), (XIII-20), (XIII-22), (XIII-40) and (XIII-42) More preferably, it is a compound represented by the formula (XIII-1) and (XIII-2), and more preferably a compound represented by the formula (XIII-1).

The compound represented by the formula (XIII-1) is specifically preferably a compound represented by the formula (XIII-1-1) to the formula (XIII-1-16).

Among the above compounds, a compound represented by the formula (XIII-1-1) to the formula (XIII-1-6) is preferred, and more preferably a formula (XIII-1-1) or a formula. The compound represented by the formula (XIII-1-2) and the formula (XIII-1-4) is preferably a compound represented by the formula (XIII-1-2) and the formula (XIII-1-4).

R ^X1 and R ^X2 in the formula (XIII) each independently represent an alkyl group having 1 to 8 carbon atoms, an alkenyl group having 2 to 8 carbon atoms, an alkoxy group having 1 to 8 carbon atoms or a carbon number. The alkenyloxy group having 2 to 8 is preferably an alkyl group having 1 to 8 carbon atoms or an alkenyl group having 2 to 8 carbon atoms, more preferably an alkyl group having 2 to 5 carbon atoms or 2 to 5 carbon atoms. The alkenyl group is particularly preferably an alkyl group having 2 to 5 carbon atoms, preferably a straight chain. When both R ^X1 and R ^X2 are alkyl groups, the number of carbon atoms is preferably different.

More specifically, a compound wherein R ^X1 represents a propyl group and R ^X2 represents an ethyl group or a compound wherein R ^X1 represents a butyl group and R ^X2 represents an ethyl group is preferred.

The liquid crystal composition of the present invention can use a nematic phase ‧ isotropic liquid phase transition temperature (T _NI ) in a wide range, but is preferably 60 to 120 ° C, more preferably 70 to 100 ° C, and particularly preferably 70 ° 90 ° C.

The liquid crystal composition of the present invention must have a compound of the formula (i) and the formula (ii-b), and in a more preferred embodiment, a compound of the formula (L) to the formula (X) may be contained. In this case, the content is preferably the content described below.

When the compound represented by the formula (i), the formula (ii-b) and the formula (L) is contained, the total content of these compounds is preferably from 45% by mass to 80% by mass, more preferably from 50 to 75% by mass, It is preferably 48 to 73% by mass, particularly preferably 50% by mass to 72% by mass, and most preferably 50 to 68% by mass.

When the compound represented by the formula (i), the formula (ii-b) and the formula (X) is contained, the total content of these compounds is preferably from 40 to 80% by mass, more preferably from 45 to 75% by mass, particularly preferably It is 47% by mass to 72% by mass, particularly preferably 50 to 70% by mass, and most preferably 53 to 68% by mass.

When the compound represented by the formula (i), the formula (ii-b) and the formula (XIII) is contained, the total content of these compounds is preferably from 30 to 65% by mass, more preferably from 32 to 65% by mass, It is preferably 35 to 65 mass%, particularly preferably 37 to 63 mass%, and most preferably 40 to 60 mass%.

When the compound represented by the formula (i), the formula (ii-b), the formula (L) and the formula (X) is contained, the total content of these compounds is preferably from 60 to 95% by mass, more preferably from 63 to 90% by mass, particularly preferably 65 to 87% by mass, particularly preferably 68 to 85% by mass.

When the compound represented by the formula (i), the formula (ii-b), the formula (L) and the formula (XIII) is contained, the total content of the compounds is preferably from 50 to 90% by mass, more preferably from 55 to 85% by mass, particularly preferably 58 to 80% by mass, particularly preferably 60 to 78% by mass, most preferably 62 to 75% by mass.

When the compound represented by the formula (i), the formula (ii-b), the formula (X) and the formula (XIII) is contained, the total content of the compounds is preferably from 30 to 90% by mass, more preferably from 35 to 5%. 88% by mass, particularly preferably 40 to 85% by mass, particularly preferably 42 to 80% by mass, most preferably 45 to 78% by mass.

When all of the compounds represented by the formula (i), the formula (ii-b), the formula (L), the formula (X) and the formula (XIII) are contained, the total content of the compounds is preferably from 70 to 95. The mass% is more preferably 75 to 95% by mass.

In each of the compounds constituting the liquid crystal composition of the present invention, the compound having two or more fluorine atoms in one molecule, specifically, the formula (ii-b), the formula (X), and two or more fluorine atoms The proportion of the compound represented by the formula (XIII) is preferably from 40 to 90% by mass, more preferably from 45 to 85% by mass, even more preferably from 50 to 80% by mass, based on the liquid crystal composition. , when the response speed is emphasized, it is preferably 50% by mass to 60% by mass. When the driving voltage is emphasized, it is preferably 60 to 80% by mass.

The compound used in the invention of the present invention preferably does not have a chlorine atom in its molecule when the chemical stability of the liquid crystal composition is required. Further, the compound having a chlorine atom in the liquid crystal composition is preferably 5% or less, more preferably 3% or less, still more preferably 1% or less, still more preferably 0.5% or less, and is preferably substantially not contained. The term "substantially not contained" means a compound which is not formed as an impurity in the production of a compound, and a compound containing only a chlorine atom is mixed into the liquid crystal composition.

The compound used in the invention of the present invention does not have a peracid (-CO-OO-) structure in the molecule. Moreover, when importance is attached to the reliability and long-term stability of the liquid crystal composition, it is preferred not to use a compound having a cyano group or a carbonyl group. Further, when importance is attached to the stability of UV irradiation, it is preferred not to use a compound substituted with a chlorine atom. It is also preferred that only the intramolecular ring structure is a 6-membered ring compound.

The dielectric anisotropy Δε value of the liquid crystal composition of the present invention is preferably -2.0 to -6.0, more preferably -2.5 to -5.0, particularly preferably -2.5 to -4.0 at 25 ° C, if more In detail, when the response speed is important, it is preferably -2.5 to -3.4, and when the driving voltage is important, it is preferably -3.4 to -4.0.

The refractive index anisotropy Δn of the liquid crystal composition of the present invention is preferably from 0.08 to 0.13, more preferably from 0.09 to 0.12 at 25 °C. More detailed, when it corresponds to a thin cell gap, it is preferably 0.10 to 0.12, and when it corresponds to a thick cell gap, it is preferably 0.08 to 0.10.

The rotational viscosity (γ ₁ ) of the liquid crystal composition of the present invention is preferably 150 or less, more preferably 130 or less, and particularly preferably 120 or less.

In the liquid crystal composition of the present invention, Z of a function of rotational viscosity and refractive index anisotropy preferably represents a specific value. (wherein γ ₁ represents a rotational viscosity, and Δn represents a refractive index anisotropy).

Z is preferably 13,000 or less, more preferably 12,000 or less, and particularly preferably 11,000 or less.

The liquid crystal composition of the present invention, when used in an active matrix display device, must have a specific resistance of 10 ¹² (Ω··m) or more, preferably 10 ¹³ (Ω·m), more preferably 10 ¹⁴ (Ω·m). )the above.

The liquid crystal composition of the present invention may contain, in addition to the above-mentioned compounds, a normal nematic liquid crystal, a smectic liquid crystal, a cholesteric liquid crystal, an antioxidant, an ultraviolet absorber, a polymerizable monomer, or the like, depending on the application.

The polymerizable monomer is preferably a difunctional monomer represented by the formula (P). (wherein, X ⁷ and X ⁸ each independently represent a hydrogen atom or a methyl group, and Sp ¹ and Sp ² each independently represent a single bond, an alkylene group having 1 to 8 carbon atoms or -O-(CH ₂ ) _s - (wherein s represents an integer from 2 to 7, the oxygen atom is bonded to the aromatic ring), and Z ² represents -OCH ₂ -, -CH ₂ O-, -COO-, -OCO-, -CF ₂ O- , -OCF ₂ -, -CH ₂ CH ₂ -, -CF ₂ CF ₂ -, -CH=CH-COO-, -CH=CH-OCO-, -COO-CH=CH-, -OCO-CH=CH -, -COO-CH ₂ CH ₂ -, -OCO-CH ₂ CH ₂ -, -CH ₂ CH ₂ -COO-, -CH ₂ CH ₂ -OCO-, -COO-CH ₂ -, -OCO-CH ₂ -, -CH ₂ -COO-, -CH ₂ -OCO-, -CY ¹ =CY ² - (wherein Y ¹ and Y ² each independently represent a fluorine atom or a hydrogen atom), -C≡C- or a single The bond, B, represents a 1,4-phenylene group, a trans-1,4-cyclohexylene group or a single bond, and all of the 1,4-phenylene groups in the formula may be substituted by a fluorine atom.

It is preferred that any of X ⁷ and X ⁸ represents a diacrylate derivative of a hydrogen atom, and a dimethacrylate derivative each having a methyl group, and it is also preferred that one of them represents a hydrogen atom, and the other One represents a compound of a methyl group. The polymerization rate of these compounds is the fastest in the diacrylate derivative, the dimethacrylate derivative is slow, and the asymmetric compound is in the middle thereof, and the preferred aspect can be used according to the use thereof. Among the PSA display elements, dimethacrylate derivatives are particularly preferred.

Sp ¹ and Sp ² each independently represent a single bond, an alkylene group having 1 to 8 carbon atoms or -O-(CH ₂ ) _s -, but in the PSA display element, at least one is preferably a single bond. Preferred are all compounds which represent a single bond, or one of which is a single bond and the other represents an alkylene group having 1 to 8 carbon atoms or -O-(CH ₂ ) _s -. In this case, an alkyl group of 1 to 4 is preferable, and s is preferably 1 to 4.

Z ^{1 is} preferably -OCH ₂ -, -CH ₂ O-, -COO-, -OCO-, -CF ₂ O-, -OCF ₂ -, -CH ₂ CH ₂ -, -CF ₂ CF ₂ - or The key is more preferably -COO-, -OCO- or a single bond, and particularly preferably a single bond.

B represents a 1,4-phenylene group, a trans-1,4-cyclohexylene group or a single bond in which an arbitrary hydrogen atom may be substituted by a fluorine atom, and is preferably a 1,4-phenylene group or a single bond. When C represents a ring structure other than a single bond, Z ^{2 is} also preferably a linking group other than a single bond, and when C is a single bond, Z ^{1 is} preferably a single bond.

Based on these points, in the general formula (P), the ring structure between Sp ¹ and Sp ² is specifically preferably the structure described below.

In the general formula (P), when C represents a single bond and the ring structure is formed by two rings, it preferably represents the following formula (Pa-1) to formula (Pa-5), and more preferably represents the formula (Pa-1). To the formula (Pa-3), the special expression (Pa-1), (wherein the two ends are bonded to Sp ¹ or Sp ² ).

The polymerizable compound containing these skeletons is most suitable for a PSA type liquid crystal display element because of the alignment control force after polymerization, and a good alignment state is obtained. Therefore, display unevenness is suppressed or does not occur at all.

From the above, as the polymerizable monomer, it is particularly preferred to be a formula (Pa-1-1) to a formula (Pa-1-4), and among them, the most preferable formula (Pa-1-2), (wherein, Sp ² represents an alkylene group having 2 to 5 carbon atoms).

When a monomer is added to the liquid crystal composition of the present invention, polymerization is carried out even when the polymerization initiator is not present, but a polymerization initiator may be contained in order to promote polymerization. Examples of the polymerization initiator include benzoin ethers, diphenylketones, acetophenones, benzyl ketals, and mercaptophosphine oxides. Moreover, in order to improve storage stability, a stabilizer may be added. Examples of the stabilizer that can be used include hydroquinones, hydroquinone monoalkyl ethers, tert-butylcatechols, pyrogallols, thiophenes, nitro compounds, and β-naphthylamines. Classes, β-naphthols, nitroso compounds, and the like.

The liquid crystal composition in the present invention may further contain a compound represented by the formula (Q). (wherein R ^Q represents a linear alkyl group or a branched alkyl group having 1 to 22 carbon atoms, and one or two or more CH ₂ groups in the alkyl group are not directly adjacent to each other in an oxygen atom; Substituted by -O-, -CH=CH-, -CO-, -OCO-, -COO-, -C≡C-, -CF ₂ O-, -OCF ₂ -, M ^Q represents trans-1,4 - a cyclohexyl group, a 1,4-phenylene group or a single bond).

R ^Q represents a linear alkyl group or a branched alkyl group having 1 to 22 carbon atoms, and one or more of the CH ₂ groups in the alkyl group may be -O- in such a manner that the oxygen atoms are not directly adjacent to each other. , -CH=CH-, -CO-, -OCO-, -COO-, -C≡C-, -CF ₂ O-, -OCF ₂ -, preferably a linear alkane having from 1 to 10 carbon atoms a linear alkyl group, a linear alkoxy group, a linear CH ₂ group substituted with -OCO- or -COO-, a branched alkyl group, a branched alkoxy group, and a CH ₂ group substituted with -OCO a branched alkyl group of -OR-COO-, more preferably a linear alkyl group having 1 to 20 carbon atoms, a linear alkyl group in which 1 CH ₂ group is substituted with -OCO- or -COO-, a branched alkyl group The base, the branched alkoxy group, and one CH ₂ group are substituted with a branched alkyl group of -OCO- or -COO-. M ^Q represents a trans-1,4-cyclohexylene group, a 1,4-phenylene group or a single bond, preferably a trans-1,4-cyclohexylene group or a 1,4-phenylene group.

More specifically, the compound represented by the formula (Q) is preferably a compound represented by the following formula (Q-a) to formula (Q-d).

In the formula, R ^{Q1 is} preferably a linear alkyl group or a branched alkyl group having 1 to 10 carbon atoms, and R ^{Q2 is} preferably a linear alkyl group or a branched alkyl group having 1 to 20 carbon atoms, and R ^Q3 is more preferred. Preferred is a linear alkyl group having 1 to 8 carbon atoms, a branched alkyl group, a linear alkoxy group or a branched alkoxy group, and L ^{Q is} preferably a linear alkyl group or a branch having 1 to 8 carbon atoms. Chain alkyl. Among the compounds represented by the formula (Qa) to the formula (Qd), a compound represented by the formula (Qc) and the formula (Qd) is more preferred. In the liquid crystal composition of the present invention, it is preferred to contain one or two kinds of compounds represented by the formula (Q), more preferably one to five, and the content thereof is preferably from 0.001 to 1% by mass. More preferably, it is 0.001 to 0.1% by mass, and particularly preferably 0.001 to 0.05% by mass.

The liquid crystal composition containing a polymerizable compound of the present invention is suitable for a liquid crystal display element, and is particularly suitable for a liquid crystal display element for active matrix driving, and can be used for liquid crystal display for PSA mode, PSVA mode, VA mode, IPS mode or ECB mode. element.

The liquid crystal composition containing a polymerizable compound of the present invention is capable of polymerizing a polymerizable compound contained therein by ultraviolet irradiation to impart a liquid crystal alignment ability, and is used for liquid crystal which controls the amount of light transmitted by the birefringence of the liquid crystal composition. Display component. For liquid crystal display elements, suitable for AM-LCD (active matrix liquid crystal display elements), TN (nematic liquid crystal display elements), STN-LCD (super twisted nematic liquid crystal display elements), OCB-LCD and IPS-LCD (surface) The internal switching liquid crystal display element) is particularly suitable for an AM-LCD, and can be used for a transmissive or reflective type liquid crystal display element.

The two substrates of the liquid crystal cell used in the liquid crystal display element can be made of a transparent material such as glass or plastic, one of which is soft. An opaque material such as enamel can also be used for the film. The transparent substrate having a transparent electrode layer can be obtained, for example, by sputtering indium tin oxide (ITO) on a transparent substrate such as a glass plate.

The substrates are opposed to each other such that the transparent electrode layer is inside. In this case, the interval between the substrates can also be adjusted via the spacer. In this case, it is preferred to adjust so that the thickness of the obtained light control layer is 1 to 100 μm. It is more preferably 1.5 to 10 μm. When a polarizing plate is used, it is preferable to adjust the product of the refractive index anisotropy Δn of the liquid crystal and the cell thickness d in such a manner that the contrast is maximized. Further, when there are two polarizing plates, the polarizing axes of the respective polarizing plates can be adjusted, and the viewing angle or contrast can be adjusted in a good manner. Further, in order to increase the viewing angle, a retardation film can also be used. Examples of the spacer include glass particles, plastic particles, alumina particles, and a photoresist. Then, a sealant such as an epoxy thermosetting composition is screen-printed on the substrate in the form of a liquid crystal injection port, and the substrates are bonded to each other and heated to thermally cure the sealant.

In the method of sandwiching a liquid crystal composition containing a polymerizable compound between two substrates, a general vacuum injection method, an ODF method, or the like can be used, and in the vacuum injection method, although there is no dripping trace, there is a problem that it remains after the injection. In the invention of the present invention, it is more suitable for manufacturing a display element using the ODF method.

As a method of polymerizing the polymerizable compound, in order to obtain a good alignment property of the liquid crystal, it is preferred to have a moderate polymerization rate. Therefore, it is preferred to polymerize by direct or alternately or alternately irradiating active energy rays such as ultraviolet rays or electron beams. The method. When using ultraviolet light, a polarized light source or a non-polarized light source can be used. Moreover, it is sandwiched between two substrates When the polymerization is carried out in the state of the liquid crystal composition of the polymerizable compound, at least the substrate on the irradiation surface side must have appropriate transparency to the active energy ray. Further, it is also possible to use a mask to modulate only a specific portion after light irradiation, and to change the alignment state of the unpolymerized portion by changing conditions such as an electric field, a magnetic field, or a temperature, and then irradiate the active energy ray so that the active energy ray is irradiated. The means of aggregation. In particular, in the case of ultraviolet light exposure, it is preferred to perform ultraviolet exposure while applying an alternating electric field to the liquid crystal composition containing the polymerizable compound. The applied alternating electric field is preferably an alternating current having a frequency of 10 Hz to 10 kHz, more preferably a frequency of 60 Hz to 10 kHz, and the voltage is selected depending on the desired pretilt angle of the liquid crystal display element. That is, the pretilt angle of the liquid crystal display element can be controlled by the applied voltage. In the liquid crystal display device of the transverse electric field type MVA mode, it is preferable to control the pretilt angle from 80 to 89.9 degrees from the viewpoint of alignment stability and contrast.

The temperature at the time of irradiation is preferably within a temperature range in which the liquid crystal state of the liquid crystal composition of the present invention is maintained. Preferably, the polymerization is carried out at a temperature close to room temperature, i.e., typically at a temperature of from 15 to 35 °C. As the lamp for generating ultraviolet rays, a metal halide lamp, a high pressure mercury lamp, an ultrahigh pressure mercury lamp, or the like can be used. Further, as the wavelength of the ultraviolet ray to be irradiated, it is preferred to irradiate the ultraviolet ray which is not in the wavelength range of the absorption wavelength range of the liquid crystal composition, and it is preferred to use the ultraviolet ray to cut off the ultraviolet ray as needed. The intensity of the ultraviolet ray to be irradiated is preferably from 0.1 mW/cm ² to 100 W/cm ² , more preferably from 2 mW/cm ² to 50 W/cm ² . The energy of the ultraviolet ray to be irradiated can be suitably adjusted, and is preferably from 10 mJ/cm ² to 500 J/cm ² , more preferably from 100 mJ/cm ² to 200 J/cm ² . When the ultraviolet ray is irradiated, the intensity can also be changed. The time for irradiating the ultraviolet rays is appropriately selected depending on the intensity of the ultraviolet rays to be irradiated, and is preferably from 10 seconds to 3600 seconds, more preferably from 10 seconds to 600 seconds.

The liquid crystal display device of the present invention has a first substrate having a common electrode made of a transparent conductive material, and includes a pixel electrode formed by controlling a transparent conductive material, as described in FIG. a second substrate of a thin film transistor of a pixel electrode provided on each pixel, a liquid crystal composition sandwiched between the first substrate and the second substrate; and no voltage application of liquid crystal molecules in the liquid crystal composition The alignment is a liquid crystal display element which is slightly perpendicular to the substrate, and is characterized in that the liquid crystal composition of the present invention is used as the liquid crystal composition.

The occurrence of the drop marks is greatly affected by the injected liquid crystal material, and the influence of the display elements cannot be avoided. In particular, a color filter, a thin film transistor, or the like formed in a liquid crystal display element has only a thin alignment film, a transparent electrode, and the like which are separated from the liquid crystal composition, so that the occurrence of dripping marks is affected by the combination.

In particular, when the thin film transistor is of an inverted staggered type, the area thereof tends to increase in order to form the gate electrode with the tantalum electrode. The ruthenium electrode is formed of a metal material such as copper, aluminum, chromium, titanium, molybdenum or tantalum, and is generally in the form of a passivation treatment. However, the protective film is generally thin, and the alignment film is also thin. Since the possibility of not blocking the ionic substance is high, the occurrence of dripping marks due to the interaction of the metal material and the liquid crystal composition cannot be avoided.

In the invention of the present invention, as described in FIG. 2, it is applicable to a liquid crystal display element in which a thin film transistor is an inverted stagger type, and it is preferable to use an aluminum wiring.

A liquid crystal display element using the liquid crystal composition of the present invention, It can be used for both high-speed response and display failure suppression, and is particularly useful for active matrix drive liquid crystal display elements, and is applicable to VA mode, PSVA mode, PSA mode, IPS mode, or ECB mode.

[Examples]

The invention is further illustrated by the following examples, but the invention is not limited by the examples. In addition, "%" in the composition of the following examples and comparative examples means "mass%".

In the examples, the measured characteristics are as follows.

T _NI : nematic phase-isotropic liquid phase transfer temperature (°C)

△n: refractive index anisotropy at 20 ° C

△ ε: dielectric anisotropy at 20 ° C

η: viscosity at 20 ° C (mPa ‧ s)

γ ₁ : rotational viscosity at 20 ° C (mPa ‧ s)

VHR: Voltage holding ratio at 70 ° C at a frequency of 60 Hz and a voltage of 5 V (%)

VHR after the heat resistance test: The VHR measurement TGE (Test-Element-Group) in which the liquid crystal composition was injected was held in a thermostat at 120 ° C for 30 minutes, and then measured under the same conditions as the above VHR measurement method.

Burning:

The cauterization evaluation of the liquid crystal display element is performed by displaying the predetermined fixed pattern for 1200 hours in the display area, and when the full-screen uniform display is performed, the degree of the residual image of the fixed pattern is visually recognized by the following four levels.

◎ no afterimage (very good degree)

○ There are very few afterimages, but they are also tolerable (good level)

△ There is an afterimage, the degree that cannot be tolerated (degree of failure)

× There are afterimages, quite bad (degree of difference)

Drop the trace:

The evaluation of the dripping marks of the liquid crystal display device was carried out by visual evaluation of the dropping marks which were visually observed in the case of full black display, and was evaluated by the following four levels.

◎ no afterimage (very good degree)

○ There are very few afterimages, but they are also tolerable (good level)

△ There is an afterimage, the degree that cannot be tolerated (degree of failure)

× There are afterimages, quite bad (degree of difference)

Process suitability:

The process suitability is based on the ODF process. Using a fixed-volume metering pump, the liquid crystal is dropped at 25 pL per time for 100,000 times. The following four levels are used to evaluate the following "0 to 200 times, 201 to 400 times, 401 to 600". The change in the amount of liquid crystal dropped by 200 times each time, ‧ ‧ ‧ 990 801 ~ 100,000 times

◎The change is extremely small (the liquid crystal display element can be stably manufactured. Very good degree)

○ There is a slight change, but it is also tolerable (good level)

△ There is a change, the degree that cannot be tolerated (the yield is deteriorated due to unevenness. The degree of failure)

×Changes, quite bad (liquid crystal leakage or vacuum bubbles occur) (degree of difference)

Solubility at low temperatures:

The solubility evaluation at low temperature was carried out by weighing 0.5 g of the liquid crystal composition in a 1 mL vial after modulating the liquid crystal composition, and in the temperature-controlled test tank, the following was regarded as one cycle "-25 ° C ( 1 hour hold) → temperature rise (0.1 ° C / min) → 0 ° C (1 hour hold) → temperature rise (0.1 ° C / min) → 25 ° C (1 hour hold) → temperature drop (-0.1 ° C / min) → 0 °C (1 hour hold) → temperature drop (-0.1 ° C / min) → -25 ° C", the temperature change was continuously continued, and the occurrence of precipitates from the liquid crystal composition was visually observed, and the following four grades were evaluated.

◎ No precipitate was observed for 672 hours or longer. (very good level)

○ No precipitate was observed for 336 hours or more. (good level)

△ The precipitate was observed within 168 hours. (degree of bad)

× precipitate was observed within 84 hours. (degree of difference)

Further, in the examples, the description of the compounds uses the following abbreviations.

(side chain structure and joint structure)

-n -C _n H _2n+1 a linear alkyl group having a carbon number n

N- C _n H _2n+1 - a linear alkyl group having a carbon number n

-On -OC _n H _2n+1 linear alkoxy group of carbon number n

nO- C _n H _2n+1 O- linear alkoxy group of carbon number n

-V -CH=CH ₂

V- CH ₂ =CH-

-V1 -CH=CH-CH ₃

1V- CH ₃ -CH=CH-

-2V -CH ₂ -CH ₂ -CH=CH ₃

V2-CH ₃ =CH-CH ₂ -CH ₂ -

-2V1 -CH ₂ -CH ₂ -CH=CH-CH ₃

1V2-CH ₃ -CH=CH-CH ₂ -CH ₂ -

(ring structure)

(Comparative Example 1 and Examples 1 to 3)

A liquid crystal composition (LC1 to 4) having the composition shown below was prepared, and the physical property value thereof was measured. The results are shown in the table below.

The VA liquid crystal display element shown in Fig. 1 was produced using the respective liquid crystal compositions. This liquid crystal display element has an inversely staggered thin film transistor as an active element. The injection of the liquid crystal composition was carried out by a dropping method to evaluate the cauterization, the dropping trace, the process suitability, and the solubility at a low temperature.

Further, the symbol on the left side of the content is the abbreviation of the above compound.

Comparing the liquid crystal compositions LC-2 to 4 of Examples 1 to 3 with the liquid crystal composition LC-1 of Comparative Example 1 containing no compound of the formula (i), it was found that the viscosity η and the rotational viscosity γ1 were low. Panel evaluation performance, process suitability, and solubility at low temperatures are excellent.

(Examples 4 to 7)

A liquid crystal composition (LC-5 to 8) having the composition shown below was prepared, and the physical property value thereof was measured. Also, by the liquid crystal display element, Evaluation of burning, dripping marks, process suitability, and solubility at low temperatures. The results are shown below.

In the liquid crystal compositions LC-5 to 8 of Examples 4 to 7, the liquid crystal composition LC-6 of Example 5 was added in an amount of 4% by mass based on the compound of the formula (i), which was slightly inferior, but was excellent. result.

(Comparative Example 2 and Examples 8 to 10)

A liquid crystal composition (LC-9 to 12) having the composition shown below was prepared, and the physical property value thereof was measured. Further, the liquid crystal display element was used to evaluate the cauterization, the dropping trace, the process suitability, and the solubility at low temperatures. The results are shown below.

The liquid crystal compositions LC-9, 10, and 12 of Examples 8 to 10 were compared with the liquid crystal composition LC-11 of Comparative Example 2 containing no compound of the formula (ii-b), and the viscosity η and the rotational viscosity γ1 were observed. Low, excellent in various panel evaluation performance, process suitability, and solubility at low temperatures.

(Examples 11 to 14)

A liquid crystal composition (LC-13 to 16) having the composition shown below was prepared, and the physical property value thereof was measured. Further, the liquid crystal display element was used to evaluate the cauterization, the dropping trace, the process suitability, and the solubility at low temperatures. The results are shown below.

Good results were obtained in the liquid crystal compositions LC-13 to 16 of Examples 11 to 14.

(Examples 15 to 18)

A liquid crystal composition (LC-17 to 20) having the composition shown below was prepared, and the physical property value thereof was measured. Further, the liquid crystal display element was used to evaluate the cauterization, the dropping trace, the process suitability, and the solubility at low temperatures. The results are shown below.

Good results were obtained in the liquid crystal compositions LC-17 to 20 of Examples 15 to 18.

(Examples 19 to 22)

A liquid crystal composition (LC-21 to 24) having the composition shown below was prepared, and the physical property value thereof was measured. Moreover, by the liquid crystal display element, The evaluation of cauterization, dripping marks, process suitability, and solubility at low temperatures was performed. The results are shown below.

In the liquid crystal compositions LC-21 to 24 of Examples 19 to 22, Get good results.

(Examples 23 to 26)

A liquid crystal composition (LC-25 to 28) having the composition shown below was prepared, and the physical property value thereof was measured. Further, the liquid crystal display element was used to evaluate the cauterization, the dropping trace, the process suitability, and the solubility at low temperatures. The results are shown below.

Good results were obtained in the liquid crystal compositions LC-25 to 28 of Examples 23 to 26.

(Example 27)

Modulation of a liquid crystal composition having the composition shown below (LC-27), the physical property value was measured. Further, the liquid crystal display element was used to evaluate the cauterization, the dropping trace, the process suitability, and the solubility at low temperatures. The results are shown below.

Various panel evaluation results, process suitability, and solubility evaluation showed good results.

(Embodiment 28)

To 99.85% of the nematic liquid crystal composition LC-33 shown in Example 27, 0.15% of the polymerizable compound shown below was added. It was uniformly dissolved to prepare a polymerizable liquid crystal composition CLC-A. The physical properties of CLC-A and the physical properties of the nematic liquid crystal composition shown in Example 27 were hardly different. CLC-A was injected into the ITO-attached cell of the polyimine alignment film in which the horizontal alignment was induced by a vacuum injection method at a cell gap of 3.5 μm. While applying a rectangular wave having a frequency of 1 kHz to the unit cell, ultraviolet rays were irradiated onto the liquid crystal cell by a high-pressure mercury lamp by a filter that cuts off ultraviolet rays of 320 nm or less. The irradiation intensity of the surface of the unit cell was adjusted to 10 mW/cm ² , and the mixture was irradiated for 600 seconds to obtain a vertically-aligned liquid crystal display element in which the polymerizable compound in the polymerizable liquid crystal composition was polymerized. Since the polymerization of the polymerizable compound, it was confirmed that the alignment control force was generated for the liquid crystal compound.

Claims (13)

A liquid crystal composition having a negative dielectric anisotropy, comprising a compound represented by the formula (i) and a compound represented by the formula (ii-b), The liquid crystal composition of claim 1, which contains 24 to 50% by mass of the compound represented by the formula (i). The liquid crystal composition of the first aspect of the patent application, which further comprises one or more types of compounds represented by the formula (L). (wherein R ^L1 and R ^L2 each independently represent an alkyl group having 1 to 8 carbon atoms, and one of the alkyl groups or two or more non-adjacent-CH ₂ - groups may independently be -CH =CH-, -C≡C-, -O-, -CO-, -COO- or -OCO-substitution, OL means 0, 1, 2 or 3, B ^L1 , B ^L2 and B ^L3 are each independently represented a radical in the group consisting of (a) 1,4-cyclohexylene, and (b) 1,4-phenylene, wherein the above-mentioned groups (a) and (b) are each independently cyano And a fluorine atom or a chlorine atom is substituted, and L ^L1 and L ^L2 each independently represent a single bond, -CH ₂ CH ₂ -, -(CH ₂ ) ₄ -, -OCH ₂ -, -CH ₂ O-, -COO-, -OCO-, -OCF ₂ -, -CF ₂ O-, -CH=NN=CH-, -CH=CH-, -CF=CF- or -C≡C-, when OL is 2 or 3 and L ^L2 When the complex number is present, they may be the same or different. When OL is 2 or 3 and B ^L3 is plural, they may be the same or different, but the compound of formula (i), formula (ii-b) ) the compound shown, except for the compound represented by the following formula (X), (wherein R ^X1 and R ^X2 independently of each other 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; The presence of one methylene group or two or more methylene groups which are not adjacent may be substituted with -O- or -S, and one or more hydrogen atoms present in the groups may be substituted a fluorine atom or a chlorine atom, u and v each independently represent 0, 1 or 2, and u+v is 2 or less, and M ^X1 , M ^X2 and M ^{X3 are} independently selected from (a) trans-1, 4 a group in the group consisting of (b) 1,4-phenylene, and each of the hydrogen atoms contained in the above-mentioned group (a) or group (b) may be a cyano group or a fluorine atom. Trifluoromethyl, trifluoromethoxy or chlorine atom substitution, when M ^X2 and / or M ^X3 are plural, they may be the same or different, L ^X1 , L ^X2 and L ^X3 independently of each other represent a single bond , -COO-, -OCO-, -CH ₂ CH ₂ -, -(CH ₂ ) ₄ -, -OCH ₂ -, -CH ₂ O-, -OCF ₂ -, -CF ₂ O-, -CH=CH - or -C≡C-, when L ^X1 and / or the presence of a plurality of lines L ^X3, their may be the same or different, X ^X1 and X ^X2 each independently represents a trifluoromethyl group, a trifluoromethoxy Or fluorine atom, but any one of a fluorine atom; provided that, except for the compound represented by the formula (ii-b)). A liquid crystal composition according to claim 3, wherein the compound represented by the formula (L) is a compound represented by the formula (IC) or the formula (II-a), (wherein R ¹³ represents an alkyl group having 1 to 5 carbon atoms, and R ¹⁵ represents an alkoxy group having 1 to 4 carbon atoms) (wherein R ¹¹ represents an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms or an alkoxy group having 1 to 4 carbon atoms; and R ¹² represents an alkyl group having 1 to 5 carbon atoms; An alkenyl group having 4 to 5 carbon atoms or an alkoxy group having 1 to 4 carbon atoms). The liquid crystal composition of the first aspect of the invention, which further comprises one or more types of compounds represented by the formula (X). (wherein R ^X1 and R ^X2 independently of each other 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; The presence of one methylene group or two or more methylene groups which are not adjacent may be substituted with -O- or -S-, and one or more hydrogen atoms present in the groups may be Substituting into a fluorine atom or a chlorine atom, u and v independently of each other represent 0, 1 or 2, and u+v is 2 or less, and M ^X1 , M ^X2 and M ^{X3 are} independently selected from (a) trans-1, a group in the group consisting of 4-cyclohexyl group, (b) 1,4-phenylene group, and each of the hydrogen atoms contained in the above-mentioned group (a) or group (b) may be a cyano group or a fluorine atom. , trifluoromethyl, trifluoromethoxy or chlorine atom substitution, when M ^X2 and / or M ^X3 are plural, they may be the same or different, L ^X1 , L ^X2 and L ^X3 independently of each other Bond, -COO-, -OCO-, -CH ₂ CH ₂ -, -(CH ₂ ) ₄ -, -OCH ₂ -, -CH ₂ O-, -OCF ₂ -, -CF ₂ O-, -CH= CH- or -C≡C-, when L ^X1 and/or L ^X3 are plural, they may be the same or different, and X ^X1 and X ^X2 independently of each other represent trifluoromethyl, trifluoromethoxy a group or a fluorine atom, but any one of them represents a fluorine atom; except for the compound represented by the formula (ii-b). The liquid crystal composition according to claim 5, wherein the compound represented by the formula (X) is a compound represented by the formula (XI-1), the formula (XII-1) or the formula (XIII). (wherein R ^X11 and R ^X21 each independently represent an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms, an alkoxy group having 1 to 5 carbon atoms or a carbon number of 2 to 5; Alkenyloxy), (Wherein, R ^X1 represents general formula (X) in the same meaning as R ^X1, R ^X2 represents general formula (X) in the same meaning as R ^X2), (wherein R ^X1 represents the same meaning as R ^X1 in the formula (X), M ^X31 represents the same meaning as M ^X1 in the formula (X), and R ^X2 represents R in the formula (X) ^{X2 has the} same meaning, W represents 0 or 1, and X ³¹ ~ X ³⁶ represents a hydrogen atom or a fluorine atom, but at least a combination of X ³¹ and X ³² , a combination of X ³³ and X ³⁴ , and a combination of X ³⁵ and X ³⁶ The combination of 1 group is a fluorine atom). The liquid crystal composition of claim 6, wherein the compound represented by the formula (XII-1) contains the compound represented by the formula (ii-a), The liquid crystal composition of claim 7, wherein the total of the compounds represented by the formula (ii-a) and the formula (ii-b) is 5 to 30% by mass. The liquid crystal composition of claim 1, which comprises the formula (i), the formula (ii-a), the formula (ii-b), the formula (Ic), the formula (II-a), and the formula (II) The compound represented by the formula XI-1), the formula (XII-1) or the formula (XIII) is contained in an amount of from 95% by mass to 100% by mass. The liquid crystal composition of claim 1, which contains a reactive monomer. A liquid crystal display element using the liquid crystal composition as in the first aspect of the patent application. A liquid crystal display element using the liquid crystal composition of claim 10 of the patent application. A liquid crystal display using a liquid crystal display element as in claim 11 or 12.