TWI743350B - Liquid crystal composition and liquid crystal display element - Google Patents

Abstract

The problem to be solved by the present invention is to provide an n-type liquid crystal composition that improves the viewing angle characteristics while satisfying the characteristics required for the so-called n-type liquid crystal composition in which the dielectric anisotropy (Δε) is negative, and provides Use its liquid crystal display element.

The present invention provides a liquid crystal composition with negative dielectric anisotropy. The total content of the compound represented by the general formula (i) is 3% or more relative to the total amount of the composition. The total content of the compounds shown in (ii) is 3% or more, relative to the total amount of the compound represented by the general formula (i), the compound represented by the general formula (ii), and the compound represented by the general formula (L), the general formula The total content of the compounds shown in (i) is 20% or more, and a liquid crystal display element using these is provided.

Description

Liquid crystal composition and liquid crystal display element

The present invention relates to a so-called n-type liquid crystal composition with negative dielectric anisotropy (Δε) and a liquid crystal display element using the n-type liquid crystal composition.

Liquid crystal display elements using a composition having a negative value of Δε are widely used in liquid crystal TVs and the like. In the composition used in these applications, extremely high characteristics have been required in recent years. Specifically, while responding to the high-speed response, low power consumption, long-term and short-term reliability, and wide liquid crystal phase temperature range corresponding to animation display, high brightness, improved viewing angle characteristics, and high resolution are required. Therefore, for liquid crystal compositions, the conventionally used liquid crystal compositions (Patent Documents 1, 2, and 3) are required to meet their required characteristics, and there is a demand for the optimization of the liquid crystal compound contained and the optimization of the content. In addition, it is required that display defects such as image sticking of the display element are not likely to occur, drip marks during manufacturing are not likely to occur, and stable discharge properties of the composition in the ODF process must also be met.

Prior art literature Patent literature

Patent Document 1 WO2016/017569 Publication

Patent Document 2 JP 2016-040368 A

Patent Document 3 JP 2016-033132 A

The problem to be solved by the present invention is to provide an n-type liquid crystal composition that improves the viewing angle characteristics while satisfying the characteristics required for the so-called n-type liquid crystal composition in which the dielectric anisotropy (Δε) is negative, and provides Use its liquid crystal display element.

The inventors reviewed various liquid crystal compounds and various chemical substances, and found that by selecting them and adjusting the content, the aforementioned problems can be solved, and finally the present invention was completed.

The present invention provides a liquid crystal composition with a negative dielectric constant anisotropy, which contains one or more compounds selected from the compound represented by the general formula (i), and the compound represented by the general formula (ii) One or more compounds selected from the compound, one or more compounds selected from the compound represented by the general formula (N-1d), and one or more compounds selected from the compound represented by the general formula (N-1) One or two or more compounds selected, one or two or more compounds selected from the compound represented by the general formula (L), relative to the total amount of the composition, the total of the compounds represented by the general formula (i) The content is 3% or more, relative to the total amount of the composition, the total content of the compound represented by general formula (ii) is 3% or more, relative to the compound represented by general formula (i) and the compound represented by general formula (ii) And the total amount of the compound represented by the general formula (L), the total content of the compound represented by the general formula (i) is 20% or more; and a liquid crystal display element using the same is provided.

(In the formula, R ⁱ¹ and R ⁱⁱ¹ each independently represent an alkyl group having 1 to 5 carbon atoms, R ⁱ² and R ⁱⁱ² each independently represent a methyl group or a methoxy group, R ^Nd11 , R ^Nd12 , R ^N11 , R ^N12 , R ^L1 and R ^L2 each independently represent an alkyl group having 1 to 8 carbon atoms, and one or two or more non-adjacent -CH ₂ -groups in the alkyl group can each independently be -CH=CH- , -C≡C-, -O-, -CO-, -COO- or -OCO- substituted, n ^Nd11 represents 1, 2 or 3, n ^N11 and n ^N12 represent 0, 1, 2 or 3, but n ^N11 +n ^N12 represents 1, 2 or 3, n ^L1 represents 0, 1, 2 or 3, A ^N11 , A ^N12 , A ^L1 , A ^L2 and A ^L3 each independently represent selected from including

(a) 1,4-cyclohexylene (1 -CH ₂ -or 2 or more unadjacent -CH ₂ -in this group can be substituted into -O-) and

(b) 1,4-Phenylene (1 -CH= or 2 or more unadjacent -CH= in this group can be substituted into -N=)

(c) Naphthalene-2,6-diyl, 1,2,3,4-tetrahydronaphthalene-2,6-diyl or decahydronaphthalene-2,6-diyl (naphthalene-2,6-diyl Or 1 -CH= in 1,2,3,4-tetrahydronaphthalene-2,6-diyl group or 2 or more non-adjacent -CH= groups that can be substituted into -N=) The above-mentioned group (a), group (b) and group (c) are each independently substituted by a cyano group, a fluorine atom or a chlorine atom, and Z ^N11 , Z ^N12 , Z ^L1 and Z ^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 A ^N11 , A ^N12 , A ^L1 , A ^L2 and/or A ^L3 are plural, they can be the same or the same Different, when Z ^N11 , Z ^N12 , Z ^L1 and/or Z ^L2 are plural, they can be the same or different, but the compound represented by general formula (N-1) does not include general formula (N-1d) The compounds shown, the compounds represented by the general formula (L) do not include the compounds represented by the general formula (i), the general formula (ii), the general formula (N-1d), and the general formula (N-1)).

The so-called n-type liquid crystal composition system in which Δε is negative in the present invention satisfies various characteristics required of the n-type liquid crystal composition, while improving viewing angle characteristics, and has excellent display characteristics. The liquid crystal display element of the present invention is suitable for display elements such as liquid crystal TVs and monitors.

The form of the invention

As mentioned above, the present invention relates to a specific n-type liquid crystal composition and a liquid crystal display element using the same. Hereinafter, first, the embodiment of the liquid crystal composition in the present invention will be described.

The composition of the present invention contains one or more compounds selected from the compound represented by the general formula (i), one or more compounds selected from the compound represented by the general formula (ii), One or more compounds selected from the compound represented by the general formula (N-1d), one or more compounds selected from the compound represented by the general formula (N-1), One or more compounds selected from the compound represented by the formula (L).

The compound represented by the general formula (i) corresponds to a dielectric neutral compound (Δε is -2 to 2).

The compound system represented by general formula (i) may use only 1 type, and may use 2 or more types. From the standpoint of ease of preparation, it is preferable to use only one type.

In the general formula (i), R ^{i1 is} preferably ethyl, propyl or pentyl, more preferably ethyl or propyl, and particularly preferably propyl. R ^{i2 is} preferably a methoxy group.

Relative to the total amount of the composition of the present invention, the lower limit of the preferable content of the compound represented by formula (i) is 3%, 5%, 7%, 9%, 10%, 12%, 13%. The upper limit of the preferred content is 30%, 27%, 25%, 23%, 20%, 19%, 18%, 17%.

As the compound represented by the general formula (i), the compound represented by the formula (i-1) to (i-4) is preferred, and the compound represented by the formula (i-4) is more preferred.

Relative to the total amount of the composition of the present invention, the lower limit of the preferred content of the compound represented by formula (i-4) is 3%, 5%, 7%, 9%, 10%, 12%, 13% . The upper limit of the preferred content is 30%, 27%, 25%, 23%, 20%, 19%, 18%, 17%.

The compound represented by the general formula (ii) corresponds to a dielectric neutral compound (Δε is -2 to 2).

The compound system represented by general formula (ii) may use only 1 type, and may use 2 or more types. From the standpoint of ease of preparation, it is preferable to use only one type.

In the general formula (ii), R ^{ii1 is} preferably ethyl, propyl or pentyl, more preferably ethyl or propyl, and particularly preferably propyl. R ^{ii2 is} preferably methyl.

The lower limit of the preferable content of the compound represented by formula (ii) is 2%, 3%, 5%, 7%, 9% relative to the total amount of the composition of the present invention. The upper limit of the preferred content is 25%, 23%, 20%, 18%, 16%, 14%.

As the compound represented by the general formula (ii), the compound represented by the formula (ii-1) to (ii-4) is preferred, and the compound represented by the formula (ii-3) is more preferred.

Relative to the total amount of the composition of the present invention, the lower limit of the preferred content of the compound represented by formula (ii-3) is 3%, 5%, 7%, 9%, 10%, 12%, 13% . The upper limit of the preferred content is 30%, 27%, 25%, 23%, 20%, 19%, 18%, 17%.

The compound represented by the general formula (i) and the compound represented by the general formula (ii) are preferably those in which the compound represented by the general formula (i) is frequently used, and preferably the compound represented by the general formula (i) with a content of more than 2% The compound shown.

The preferable lower limit of the total content of the compound represented by the general formula (i) and the compound represented by the general formula (ii) is 15%, 18%, 20%, 22%, and 24% relative to the total amount of the composition. The upper limit of the preferred content is 40%, 37%, 35%, 33%, 30%, 28%.

The preferable lower limit of the total content of the compound represented by the general formula (i-4) and the compound represented by the general formula (ii-3) is 15%, 18%, 20%, 22% relative to the total amount of the composition ,twenty four%. The upper limit of the preferred content is 40%, 37%, 35%, 33%, 30%, 28%.

The compound represented by the general formula (N-1d) corresponds to a compound having a negative dielectric (Δε has a negative sign, and its absolute value is greater than 2).

The compound system represented by general formula (N-1d) may use only 1 type, and may use 2 or more types.

In the general formula (N-1d), R ^{Nd11 is} preferably an alkyl group having 1 to 8 carbon atoms, an alkoxy group having 1 to 8 carbon atoms, an alkenyl group having 2 to 8 carbon atoms, or a carbon number of 2 to The alkenyloxy group of 8, more preferably an alkyl group having 1 to 5 carbon atoms, an alkoxy group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms, or an alkenyloxy group having 2 to 5 carbon atoms , Particularly preferably an alkyl group with 1 to 5 carbon atoms or an alkenyl group with 2 to 5 carbon atoms, and particularly preferably an alkyl group with 2 to 5 carbon atoms or an alkenyl group with 2 to 3 carbon atoms It is an alkenyl group having 3 carbon atoms (propenyl group). Preferably, it is a linear alkyl group having 1 to 5 carbon atoms, a linear alkoxy group having 1 to 4 carbon atoms, and a linear alkenyl group having 2 to 5 carbon atoms. In order to stabilize the nematic phase, the total of carbon atoms and oxygen atoms when present is preferably 5 or less, preferably linear.

Particularly preferred are ethyl and propyl.

R ^{Nd12 is} preferably an alkyl group with 1 to 8 carbon atoms, an alkoxy group with 1 to 8 carbon atoms, an alkenyl group with 2 to 8 carbon atoms, or an alkenyloxy group with 2 to 8 carbon atoms, more preferably An alkyl group with 1 to 5 carbon atoms, an alkoxy group with 1 to 5 carbon atoms, an alkenyl group with 2 to 5 carbon atoms, or an alkenyloxy group with 2 to 5 carbon atoms, with 1 to 5 carbon atoms being particularly preferred The alkyl group of 5 or the alkenyl group of 2 to 5 carbon atoms is more preferably the alkyl group of 2 to 5 carbon atoms or the alkenyl group of 2 to 3 carbon atoms, and the alkenyl group of carbon atoms is particularly preferable ( Allyl). Preferably, it is a linear alkyl group having 1 to 5 carbon atoms, a linear alkoxy group having 1 to 4 carbon atoms, and a linear alkenyl group having 2 to 5 carbon atoms. In order to stabilize the nematic phase, the total of carbon atoms and oxygen atoms when present is preferably 5 or less, preferably linear.

Particularly preferred are methoxy and ethoxy.

n ^{Nd11 is} preferably 1 or 2, and preferably contains both a ^{compound in which n Nd11} is 1 and a compound in which n ^Nd11 is 2.

One or two types of compounds with n ^Nd11 being 1 can be used, but from the viewpoint of improving the lower limit temperature of the nematic phase, it is preferable to use two types. When two types are used, it is preferable to make R ^Nd11 the same Substituents.

One type or two types of compounds with n ^Nd11 of 2 can be used, but from the viewpoint of improving the lower limit temperature of the nematic phase, it is preferable to use two types. When two types are used, it is preferable to make R ^Nd12 the same Substituents.

When using ^{a compound with n Nd11} as 1 and a compound with n ^Nd11 as 2, it is preferable to use more compounds with n ^Nd11 as 2.

The compound represented by general formula (N-1d) is preferably a compound represented by general formula (N-1-10) and a compound represented by general formula (N-1-11).

The compound represented by general formula (N-1-10) is the following compound.

(In the formula, R ^N1101 and R ^N1102 each independently represent the same definition as ^{R N11} and R ^N12 in the general formula (N)).

R ^{N1101 is} preferably an alkyl group having 1 to 5 carbon atoms or an alkenyl group having 2 to 5 carbon atoms, and more preferably an ethyl, propyl, butyl, vinyl, or 1-propenyl group. R ^{N1102 is} preferably an alkyl group with 1 to 5 carbon atoms, an alkenyl group with 4 to 5 carbon atoms, or an alkoxy group with 1 to 4 carbon atoms, more preferably ethoxy, propoxy or butoxy .

The compound represented by the general formula (N-1-10) may be used alone or in combination of two or more kinds of compounds. The types of compounds that can be combined are not particularly limited, but they are appropriately combined for use in accordance with the required properties such as solubility at low temperature, transition temperature, electrical reliability, and birefringence. The type of the compound used is, for example, 1 type, 2 types, 3 types, 4 types, 5 types or more in one embodiment of the present invention.

When the improvement of Δε is important, it is better to set the content higher. When the solubility at low temperature is important, the effect is high when the content is set higher. When the _{T NI is important, the effect is high when the content is set higher.} Furthermore, when improving dripping marks or afterimage characteristics, it is preferable to set the content range in the middle.

The lower limit of the preferable content of the compound represented by formula (N-1-10) is 5%, 10%, 13%, 15%, 17%, 20% relative to the total amount of the composition of the present invention. Relative to the total amount of the composition of the present invention, the upper limit of the preferred content is 35%, 30%, 28%, 25%, 23%, 20%, 18%, 15%, 13%.

Furthermore, the compound represented by general formula (N-1-10) is preferably a compound selected from the group of compounds represented by formula (N-1-10.1) to formula (N-1-10.21), more preferably The compound represented by formula (N-1-10.1)~(N-1-10.5), formula (N-1-10.20) and formula (N-1-10.21), especially formula (N-1-10.1) , Formula (N-1-10.2), formula (N-1-10.20), and formula (N-1-10.21), particularly preferably formula (N-1-10.1) and formula (N-1 The compound represented by -10.2) is particularly preferably a compound represented by formula (N-1-10.1).

The compounds represented by formula (N-1-10.1), formula (N-1-10.2), formula (N-1-10.20) and formula (N-1-10.21) can also be used alone or in combination, but Relative to the total amount of the composition of the present invention, the lower limit of the preferred content of the compound alone or these compounds is 3%, 5%, 8%, 10%, 13%, 15%. Relative to the total amount of the composition of the present invention, the upper limit of the preferred content is 35%, 30%, 28%, 25%, 23%, 20%, 18%.

The compound represented by general formula (N-1-11) is the following compound.

(In the formula, R ^N1111 and R ^N1112 each independently represent the same definition as ^{R N11} and R ^N12 in the general formula (N)).

R ^{N1111 is} preferably an alkyl group having 1 to 5 carbon atoms or an alkenyl group having 2 to 5 carbon atoms, and more preferably an ethyl, propyl, butyl, vinyl, or 1-propenyl group. R ^{N1112 is} preferably an alkyl group with 1 to 5 carbon atoms, an alkenyl group with 4 to 5 carbon atoms, or an alkoxy group with 1 to 4 carbon atoms, more preferably ethoxy, propoxy or butoxy .

The compound represented by the general formula (N-1-11) may be used alone or in combination of two or more kinds of compounds. The types of compounds that can be combined are not particularly limited, but they are appropriately combined for use in accordance with the required properties such as solubility at low temperature, transition temperature, electrical reliability, and birefringence. The type of the compound used is, for example, 1 type, 2 types, 3 types, 4 types, 5 types or more in one embodiment of the present invention.

When the improvement of Δε is important, it is better to set the content higher. When the solubility at low temperature is important, the effect is high if the content is set lower. _{When the T NI} is important, the effect is high if the content is set higher. Furthermore, when improving dripping marks or afterimage characteristics, it is preferable to set the content range in the middle.

The lower limit of the preferable content of the compound represented by formula (N-1-11) is 5%, 10%, 13%, 15%, 17%, 20% relative to the total amount of the composition of the present invention. Relative to the total amount of the composition of the present invention, the upper limit of the preferred content is 35%, 30%, 28%, 25%, 23%, 20%, 18%, 15%, 13%.

Furthermore, the compound represented by general formula (N-1-11) is preferably a compound selected from the group of compounds represented by formula (N-1-11.1) to formula (N-1-11.15), more preferably The compounds represented by the formulas (N-1-11.1) to (N-1-11.15) are particularly preferably the compounds represented by the formula (N-1-11.2) and the formula (N-1-11.4).

The compounds represented by formula (N-1-11.2) and formula (N-1-11.4) can also be used alone or in combination, but relative to the total amount of the composition of the present invention, they can be used alone or in comparison with these compounds. The lower limit of the optimum content is 3%, 5%, 8%, 10%, 13%, 15%. Relative to the total amount of the composition of the present invention, the upper limit of the preferred content is 35%, 30%, 28%, 25%, 23%, 20%, 18%, 15%, 13%.

It is preferable to use 3 or 4 kinds of compounds represented by formula (N-1-10.1), formula (N-1-10.2), formula (N-1-11.2) and formula (N-1-11.4) The selected compound is more preferably a combination of compounds represented by formula (N-1-10.1), formula (N-1-11.2) and formula (N-1-11.4), and particularly preferably a combination of compounds represented by formula (N-1-10.1), formula (N-1-11.2) and formula (N-1-11.4) Combinations of compounds represented by 1-10.1), formula (N-1-10.2), formula (N-1-11.2) and formula (N-1-11.4).

The compound system represented by general formula (N-1) may use only 1 type, and may use 2 or more types. The compound represented by the general formula (N-1) corresponds to a compound having a negative dielectric (the sign of Δε is negative, and its absolute value is greater than 2).

The compound represented by the general formula (N-1) is preferably a compound in which Δε is negative and its absolute value is greater than 3.

In the general formula (N-1), R ^N11 and R ^N12 are each independently an alkyl group having 1 to 8 carbon atoms, an alkoxy group having 1 to 8 carbon atoms, and an alkenyl group having 2 to 8 carbon atoms. Or an alkenyl group with 2 to 8 carbon atoms, more preferably an alkyl group with 1 to 5 carbon atoms, an alkoxy group with 1 to 5 carbon atoms, an alkenyl group with 2 to 5 carbon atoms, or 2 carbon atoms ~5 alkenyloxy group, particularly preferably an alkyl group with 1 to 5 carbon atoms or an alkenyl group with 2 to 5 carbon atoms, more preferably an alkyl group with 2 to 5 carbon atoms or 2 to 3 carbon atoms The alkenyl group is particularly preferably an alkenyl group having 3 carbon atoms (propenyl group).

烷等等之飽和環結構 時，較佳為直鏈狀之碳原子數1~5的烷基、直鏈狀之碳原子數1~4的烷氧基及直鏈狀之碳原子數2~5的烯基。為了使向列相安定化，碳原子及存在時氧原子之合計較佳為5以下，較佳為直鏈狀。 In addition, when the bonded ring structure is a phenyl group (aromatic), it is preferably a linear alkyl group having 1 to 5 carbon atoms, and a linear alkoxy group having 1 to 4 carbon atoms. And alkenyl groups with 4 to 5 carbon atoms, when the bonded ring structure is cyclohexane, piperan and two

In the case of a saturated ring structure such as an alkane, it is preferably a straight-chain alkyl group with 1 to 5 carbon atoms, a straight-chain alkoxy group with 1 to 4 carbon atoms, and a straight-chain alkoxy group with 2 to 4 carbon atoms. 5 of alkenyl. In order to stabilize the nematic phase, the total of carbon atoms and oxygen atoms when present is preferably 5 or less, preferably linear.

As the alkenyl group, it is preferably selected from a group represented by any one of formula (R1) to formula (R5). (The black dots in each formula represent the carbon atoms in the ring structure).

Preferred are alkyl groups having 1 to 5 carbon atoms and alkoxy groups having 1 to 5 carbon atoms, and more preferred are methyl, ethyl, propyl, methoxy, ethoxy, and propoxy.

When it is required to increase Δn, A ^N11 and A ^N12 are each independently preferably aromatic. In order to improve the response speed, they are preferably aliphatic, and preferably represent trans-1,4-cyclohexylene and 1,4-phenylene Group, 2-fluoro-1,4-phenylene, 3-fluoro-1,4-phenylene, 3,5-difluoro-1,4-phenylene, 2,3-difluoro-1, 4-phenylene, 1,4-cyclohexenylene, 1,4-bicyclo[2.2.2]octyl, piperidine-1,4-diyl, naphthalene-2,6-diyl, ten Hydronaphthalene-2,6-diyl or 1,2,3,4-tetrahydronaphthalene-2,6-diyl, more preferably represents the following structure,

Particularly more preferred is trans 1,4-cyclohexylene, 1,4-cyclohexenylene or 1,4-phenylene, and particularly preferred is trans 1,4-cyclohexenylene or 1,4-phenylene .

Z ^N11 and Z ^N12 each independently preferably represent -CH ₂ O-, -CF ₂ O-, -CH ₂ CH ₂ -, -CF ₂ CF ₂ -or a single bond, more preferably -CH ₂ O-, -CH ₂ CH ₂ -or a single bond, particularly preferably -CH ₂ O- or a single bond.

n ^N11 + n ^{N12 is} preferably 1 or 2, more preferably a combination of n ^N11 is 1 and n ^N12 is 0, n ^N11 is 2 and n ^N12 is 0, n ^N11 is 1 and n ^N12 is 1 , N ^N11 is 2 and n ^N12 is a combination of 1.

However, the compound represented by the general formula (N-1d) is not included.

Relative to the total amount of the composition of the present invention, the lower limit of the preferred content of the compound represented by the general formula (N-1) is 1%, 10%, 20%, 30%, 40%, 50%, 55 %, 60%, 65%, 70%, 75%, 80%. The upper limit of the preferred content is 95%, 85%, 75%, 65%, 55%, 45%, 35%, 25%, 20%.

The lower limit of the total content of the compound represented by the general formula (N-1d) and the compound represented by the general formula (N-1) relative to the total amount of the composition of the present invention is 1%, 10%, 20%, 30%, 40%, 50%, 55%, 60%, 65%, 70%, 75%, 80%. The upper limit of the preferred content is 95%, 85%, 75%, 65%, 55%, 45%, 35%, 25%, 20%.

When the viscosity of the composition of the present invention is kept low and a composition with a fast response speed is required, it is preferable that the above-mentioned lower limit value is low and the upper limit value is low. Furthermore, when the Tni of the composition of the present invention is kept high and a composition with good temperature stability is required, it is preferable that the above-mentioned lower limit value is low and the upper limit value is low. In addition, when it is desired to increase the dielectric constant anisotropy in order to maintain a low driving voltage, it is preferable to increase the above-mentioned lower limit value and the upper limit value to be higher.

Examples of the compound represented by the general formula (N-1) include the group of compounds represented by the following general formulas (N-1a) to (N-1g).

(Wherein, R ^N11 and R ^N12 represents a general formula (N-1) is the same as the definitions and R ^N11 R ^N12, n ^Na11 represents 0 or ^1, n Nb11 represents 1 or ^2, n Nc11 represents 0 or 1, n ^Ne11 means 1 or 2, n ^Nf11 means 1 or 2, n ^Ng11 means 1 or 2, A ^Ne11 means trans 1,4-cyclohexylene or 1,4-phenylene, A ^Ng11 means trans 1,4-phenylene Cyclohexyl, 1,4-cyclohexenylene or 1,4-phenylene, but at least one represents 1,4-cyclohexenylene, Z ^Ne11 represents a single bond or ethylene, but at least one Represents ethylene).

More specifically, the compound represented by general formula (N-1) is preferably a compound selected from the group of compounds represented by general formulas (N-1-1) to (N-1-21).

The compound represented by general formula (N-1-1) is the following compound.

(In the formula, R ^N111 and R ^N112 each independently represent the same definition as ^{R N11} and R ^N12 in the general formula (N)).

R ^{N111 is} preferably an alkyl group having 1 to 5 carbon atoms or an alkenyl group having 2 to 5 carbon atoms, and more preferably a propyl group, a pentyl group or a vinyl group. R ^{N112 is} preferably 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 more preferably an ethoxy group or a butoxy group.

The compound represented by the general formula (N-1-1) may be used alone or in combination of two or more kinds of compounds. The types of compounds that can be combined are not particularly limited, but they are appropriately combined for use in accordance with the required properties such as solubility at low temperature, transition temperature, electrical reliability, and birefringence. The type of the compound used is, for example, 1 type, 2 types, 3 types, 4 types, 5 types or more in one embodiment of the present invention.

When the improvement of Δε is important, it is better to set the content higher. When the solubility at low temperature is important, the effect is high if the content is set more, and _{when the T NI} is important, the effect is high if the content is set less. Furthermore, when improving dripping marks or afterimage characteristics, it is preferable to set the content range in the middle.

Relative to the total amount of the composition of the present invention, the lower limit of the preferred content of the compound represented by formula (N-1-1) is 5%, 10%, 13%, 15%, 17%, 20%, 23%, 25%, 27%, 30%, 33%, 35%. Relative to the total amount of the composition of the present invention, the upper limit value of the preferred content is 50%, 40%, 38%, 35%, 33%, 30%, 28%, 25%, 23%, 20%, 18 %, 15%, 13%, 10%, 8%, 7%, 6%, 5%, 3%.

Furthermore, the compound represented by general formula (N-1-1) is preferably a compound selected from the group of compounds represented by formula (N-1-1.1) to formula (N-1-1.23), more preferably The compounds represented by formula (N-1-1.1) to (N-1-1.4) are particularly preferably compounds represented by formula (N-1-1.1) and formula (N-1-1.3).

The compounds represented by formulas (N-1-1.1)~(N-1-1.22) can also be used alone or in combination, but relative to the total amount of the composition of the present invention, alone or these compounds are preferred The lower limit of the content is 5%, 10%, 13%, 15%, 17%, 20%, 23%, 25%, 27%, 30%, 33%, 35%. Relative to the total amount of the composition of the present invention, the upper limit value of the preferred content is 50%, 40%, 38%, 35%, 33%, 30%, 28%, 25%, 23%, 20%, 18 %, 15%, 13%, 10%, 8%, 7%, 6%, 5%, 3%.

The compound represented by general formula (N-1-2) is the following compound.

(In the formula, R ^N121 and R ^N122 each independently represent the same definition as ^{R N11} and R ^N12 in the general formula (N)).

R ^{N121 is} preferably an alkyl group having 1 to 5 carbon atoms or an alkenyl group having 2 to 5 carbon atoms, and more preferably an ethyl group, a propyl group, a butyl group, or a pentyl group. R ^{N122 is} preferably 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, more preferably methyl, propyl, methoxy, ethyl Oxy or propoxy.

The compound represented by the general formula (N-1-2) may be used alone or in combination of two or more kinds of compounds. The types of compounds that can be combined are not particularly limited, but they are appropriately combined for use in accordance with the required properties such as solubility at low temperature, transition temperature, electrical reliability, and birefringence. The type of the compound used is, for example, 1 type, 2 types, 3 types, 4 types, 5 types or more in one embodiment of the present invention.

When the improvement of Δε is important, it is better to set the content higher. When the solubility at low temperature is important, the effect is high if the content is set less, and _{when the T NI} is important, the effect is high if the content is set more. Furthermore, when improving dripping marks or afterimage characteristics, it is preferable to set the content range in the middle.

Relative to the total amount of the composition of the present invention, the lower limit of the preferred content of the compound represented by formula (N-1-2) is 5%, 7%, 10%, 13%, 15%, 17%, 20%, 23%, 25%, 27%, 30%, 33%, 35%, 37%, 40%, 42%. Relative to the total amount of the composition of the present invention, the upper limit value of the preferred content is 50%, 48%, 45%, 43%, 40%, 38%, 35%, 33%, 30%, 28%, 25 %, 23%, 20%, 18%, 15%, 13%, 10%, 8%, 7%, 6%, 5%.

Furthermore, the compound represented by general formula (N-1-2) is preferably a compound selected from the group of compounds represented by formula (N-1-2.1) to formula (N-1-2.22), more preferably Formula (N-1-2.3) to Formula (N-1-2.7), Formula (N-1-2.10), Formula (N-1-2.11), Formula (N-1-2.13) and Formula (N-1 The compound represented by -2.20) is preferably the compound represented by formula (N-1-2.3) to formula (N-1-2.7) when the improvement of Δε is important, and when the improvement of _{T NI is important, it is preferably} The compounds represented by formula (N-1-2.10), formula (N-1-2.11) and formula (N-1-2.13) are preferably those represented by formula (N-1-2.20) when the improvement of response speed is important The compound shown.

The compounds represented by formula (N-1-2.1) to formula (N-1-2.22) can also be used alone or in combination, but relative to the total amount of the composition of the present invention, the compounds can be used alone or in comparison with these compounds. The lower limit of the optimum content is 5%, 10%, 13%, 15%, 17%, 20%, 23%, 25%, 27%, 30%, 33%, 35%. Relative to the total amount of the composition of the present invention, the upper limit value of the preferred content is 50%, 40%, 38%, 35%, 33%, 30%, 28%, 25%, 23%, 20%, 18 %, 15%, 13%, 10%, 8%, 7%, 6%, 5%, 3%.

The compound represented by general formula (N-1-3) is the following compound.

(In the formula, R ^N131 and R ^N132 each independently represent the same definition as ^{R N11} and R ^N12 in the general formula (N)).

R ^{N131 is} preferably an alkyl group having 1 to 5 carbon atoms or an alkenyl group having 2 to 5 carbon atoms, and more preferably an ethyl group, a propyl group, or a butyl group. R ^{N132 is} preferably an alkyl group with 1 to 5 carbon atoms, an alkenyl group with 3 to 5 carbon atoms, or an alkoxy group with 1 to 4 carbon atoms, more preferably 1-propenyl, ethoxy, or propoxy基 or butoxy.

The compound represented by the general formula (N-1-3) may be used alone or in combination of two or more kinds of compounds. The types of compounds that can be combined are not particularly limited, but they are appropriately combined for use in accordance with the required properties such as solubility at low temperature, transition temperature, electrical reliability, and birefringence. The type of the compound used is, for example, 1 type, 2 types, 3 types, 4 types, 5 types or more in one embodiment of the present invention.

When the improvement of Δε is important, it is better to set the content higher. When the solubility at low temperature is important, the effect is high if the content is set more, and when the _{T NI is important, the effect is high if the content is set more.} Furthermore, when improving dripping marks or afterimage characteristics, it is preferable to set the content range in the middle.

The lower limit of the preferable content of the compound represented by formula (N-1-3) is 5%, 10%, 13%, 15%, 17%, 20% relative to the total amount of the composition of the present invention. Relative to the total amount of the composition of the present invention, the upper limit of the preferred content is 35%, 30%, 28%, 25%, 23%, 20%, 18%, 15%, 13%.

Furthermore, the compound represented by general formula (N-1-3) is preferably a compound selected from the group of compounds represented by formula (N-1-3.1) to formula (N-1-3.21), more preferably The compounds represented by formula (N-1-3.1)~(N-1-3.7) and formula (N-1-3.21), especially formula (N-1-3.1), formula (N-1-3.2) , Compounds represented by formula (N-1-3.3), formula (N-1-3.4) and formula (N-1-3.6).

The compounds represented by formula (N-1-3.1) ~ formula (N-1-3.4), formula (N-1-3.6) and formula (N-1-3.21) can also be used alone or in combination, but It is preferably a combination of formula (N-1-3.1) and formula (N-1-3.2), from formula (N-1-3.3), formula (N-1-3.4) and formula (N-1-3.6) A combination of 2 or 3 selected. Relative to the total amount of the composition of the present invention, the lower limit of the preferred content of the compound alone or these compounds is 5%, 10%, 13%, 15%, 17%, 20%. Relative to the total amount of the composition of the present invention, the upper limit of the preferred content is 35%, 30%, 28%, 25%, 23%, 20%, 18%, 15%, 13%.

The compound represented by general formula (N-1-4) is the following compound.

(In the formula, R ^N141 and R ^N142 each independently represent the same definition as ^{R N11} and R ^N12 in the general formula (N)).

R ^N141 and R ^N142 are each independently preferably 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 more preferably a methyl group or a propyl group. , Ethoxy or butoxy.

The compound represented by the general formula (N-1-4) may be used alone or in combination of two or more kinds of compounds. The types of compounds that can be combined are not particularly limited, but they are appropriately combined for use in accordance with the required properties such as solubility at low temperature, transition temperature, electrical reliability, and birefringence. The type of the compound used is, for example, 1 type, 2 types, 3 types, 4 types, 5 types or more in one embodiment of the present invention.

When the improvement of Δε is important, it is better to set the content higher. When the solubility at low temperature is important, the effect is high if the content is set more, and _{when the T NI} is important, the effect is high if the content is set less. Furthermore, when improving dripping marks or afterimage characteristics, it is preferable to set the content range in the middle.

Relative to the total amount of the composition of the present invention, the lower limit of the preferred content of the compound represented by formula (N-1-4) is 3%, 5%, 7%, 10%, 13%, 15%, 17%, 20%. Relative to the total amount of the composition of the present invention, the upper limit value of the preferred content is 35%, 30%, 28%, 25%, 23%, 20%, 18%, 15%, 13%, 11%, 10 %,8%.

Furthermore, the compound represented by general formula (N-1-4) is preferably a compound selected from the group of compounds represented by formula (N-1-4.1) to formula (N-1-4.14), more preferably The compounds represented by formulas (N-1-4.1)~(N-1-4.4) are particularly preferably formula (N-1-4.1), formula (N-1-4.2) and formula (N-1-4.4) The compound shown.

The compounds represented by formulas (N-1-4.1)~(N-1-4.14) can also be used alone or in combination, but relative to the total amount of the composition of the present invention, one or these compounds are preferred The lower limit of the content is 3%, 5%, 7%, 10%, 13%, 15%, 17%, 20%. Relative to the total amount of the composition of the present invention, the upper limit value of the preferred content is 35%, 30%, 28%, 25%, 23%, 20%, 18%, 15%, 13%, 11%, 10 %,8%.

The compound represented by general formula (N-1-5) is the following compound.

(In the formula, R ^N151 and R ^N152 each independently represent the same definition as ^{R N11} and R ^N12 in the general formula (N)).

R ^N151 and R ^N152 are each independently preferably 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 more preferably an ethyl group or a propyl group. Or butyl.

The compound represented by the general formula (N-1-5) may be used alone or in combination of two or more kinds of compounds. The types of compounds that can be combined are not particularly limited, but they are appropriately combined for use in accordance with the required properties such as solubility at low temperature, transition temperature, electrical reliability, and birefringence. The type of the compound used is, for example, 1 type, 2 types, 3 types, 4 types, 5 types or more in one embodiment of the present invention.

When the improvement of Δε is important, it is better to set the content higher. When the solubility at low temperature is important, the effect is high if the content is set less, and _{when the T NI} is important, the effect is high if the content is set more. Furthermore, when improving dripping marks or afterimage characteristics, it is preferable to set the content range in the middle.

Relative to the total amount of the composition of the present invention, the lower limit of the preferred content of the compound represented by formula (N-1-5) is 5%, 8%, 10%, 13%, 15%, 17%, 20%. Relative to the total amount of the composition of the present invention, the upper limit of the preferred content is 35%, 33%, 30%, 28%, 25%, 23%, 20%, 18%, 15%, 13%.

Furthermore, the compound represented by general formula (N-1-5) is preferably a compound selected from the group of compounds represented by formula (N-1-5.1) to formula (N-1-5.6), more preferably Compounds represented by formula (N-1-5.1), formula (N-1-5.2), and formula (N-1-5.4).

The compounds represented by formula (N-1-5.1), formula (N-1-5.2) and formula (N-1-5.4) can also be used alone or in combination, but relative to the total composition of the present invention The lower limit of the preferable content of the compound alone or these compounds is 5%, 8%, 10%, 13%, 15%, 17%, 20%. Relative to the total amount of the composition of the present invention, the upper limit of the preferred content is 35%, 33%, 30%, 28%, 25%, 23%, 20%, 18%, 15%, 13%.

The compound represented by general formula (N-1-12) is the following compound.

(In the formula, R ^N1121 and R ^N1122 each independently represent the same definition as ^{R N11} and R ^N12 in the general formula (N)).

R ^{N1121 is} preferably an alkyl group having 1 to 5 carbon atoms or an alkenyl group having 2 to 5 carbon atoms, and more preferably an ethyl group, a propyl group, or a butyl group. R ^{N1122 is} preferably an alkyl group with 1 to 5 carbon atoms, an alkenyl group with 4 to 5 carbon atoms, or an alkoxy group with 1 to 4 carbon atoms, more preferably ethoxy, propoxy or butoxy .

The compound represented by the general formula (N-1-12) may be used alone or in combination of two or more kinds of compounds. The types of compounds that can be combined are not particularly limited, but they are appropriately combined for use in accordance with the required properties such as solubility at low temperature, transition temperature, electrical reliability, and birefringence. The type of the compound used is, for example, 1 type, 2 types, 3 types, 4 types, 5 types or more in one embodiment of the present invention.

When the improvement of Δε is important, it is better to set the content higher. When the solubility at low temperature is important, the effect is high if the content is set more, and when the _{T NI is important, the effect is high if the content is set more.} Furthermore, when improving dripping marks or afterimage characteristics, it is preferable to set the content range in the middle.

The lower limit of the preferable content of the compound represented by formula (N-1-12) is 5%, 10%, 13%, 15%, 17%, 20% relative to the total amount of the composition of the present invention. Relative to the total amount of the composition of the present invention, the upper limit value of the preferred content is 35%, 30%, 28%, 25%, 23%, 20%, 18%, 15%, 13%.

The compound represented by general formula (N-1-13) is the following compound.

(In the formula, R ^N1131 and R ^N1132 each independently represent the same definition as ^{R N11} and R ^N12 in the general formula (N)).

R ^{N1131 is} preferably an alkyl group having 1 to 5 carbon atoms or an alkenyl group having 2 to 5 carbon atoms, and more preferably an ethyl group, a propyl group, or a butyl group. R ^{N1132 is} preferably an alkyl group with 1 to 5 carbon atoms, an alkenyl group with 4 to 5 carbon atoms, or an alkoxy group with 1 to 4 carbon atoms, more preferably ethoxy, propoxy or butoxy .

The compound represented by the general formula (N-1-13) may be used alone or in combination of two or more kinds of compounds. The types of compounds that can be combined are not particularly limited, but they are appropriately combined for use in accordance with the required properties such as solubility at low temperature, transition temperature, electrical reliability, and birefringence. The type of the compound used is, for example, 1 type, 2 types, 3 types, 4 types, 5 types or more in one embodiment of the present invention.

When the improvement of Δε is important, it is better to set the content higher. When the solubility at low temperature is important, the effect is high if the content is set more, and when the _{T NI is important, the effect is high if the content is set more.} Furthermore, when improving dripping marks or afterimage characteristics, it is preferable to set the content range in the middle.

The lower limit of the preferable content of the compound represented by formula (N-1-13) is 5%, 10%, 13%, 15%, 17%, 20% relative to the total amount of the composition of the present invention. Relative to the total amount of the composition of the present invention, the upper limit of the preferred content is 35%, 30%, 28%, 25%, 23%, 20%, 18%, 15%, 13%.

The compound represented by general formula (N-1-14) is the following compound.

^(Wherein, R N1141 and ^R N1142 each independently represents general formula (N) is the same as R and R defined ^{N11 N12).}

R ^{N1141 is} preferably an alkyl group having 1 to 5 carbon atoms or an alkenyl group having 2 to 5 carbon atoms, and more preferably an ethyl group, a propyl group, or a butyl group. R ^{N1142 is} preferably 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, more preferably ethoxy, propoxy or butoxy .

The compound represented by the general formula (N-1-14) may be used alone or in combination of two or more kinds of compounds. The types of compounds that can be combined are not particularly limited, but they are appropriately combined for use in accordance with the required properties such as solubility at low temperature, transition temperature, electrical reliability, and birefringence. The type of the compound used is, for example, 1 type, 2 types, 3 types, 4 types, 5 types or more in one embodiment of the present invention.

When the improvement of Δε is important, it is better to set the content higher. When the solubility at low temperature is important, the effect is high if the content is set more, and when the _{T NI is important, the effect is high if the content is set more.} Furthermore, when improving dripping marks or residual image characteristics, it is preferable to set the content range in the middle.

The lower limit of the preferable content of the compound represented by formula (N-1-14) is 5%, 10%, 13%, 15%, 17%, 20% relative to the total amount of the composition of the present invention. Relative to the total amount of the composition of the present invention, the upper limit of the preferred content is 35%, 30%, 28%, 25%, 23%, 20%, 18%, 15%, 13%.

The compound represented by general formula (N-1-15) is the following compound.

(In the formula, R ^N1151 and R ^N1152 each independently represent the same definition as ^{R N11} and R ^N12 in the general formula (N)).

R ^{N1151 is} preferably an alkyl group having 1 to 5 carbon atoms or an alkenyl group having 2 to 5 carbon atoms, and more preferably an ethyl group, a propyl group, or a butyl group. R ^{N1152 is} preferably 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, more preferably ethoxy, propoxy or butoxy .

The compound represented by the general formula (N-1-15) may be used alone or in combination of two or more kinds of compounds. The types of compounds that can be combined are not particularly limited, but they are appropriately combined for use in accordance with the required properties such as solubility at low temperature, transition temperature, electrical reliability, and birefringence. The type of the compound used is, for example, 1 type, 2 types, 3 types, 4 types, 5 types or more in one embodiment of the present invention.

When the improvement of Δε is important, it is better to set the content higher. When the solubility at low temperature is important, the effect is high if the content is set more, and when the _{T NI is important, the effect is high if the content is set more.} Furthermore, when improving dripping marks or afterimage characteristics, it is preferable to set the content range in the middle.

The lower limit of the preferable content of the compound represented by formula (N-1-15) is 5%, 10%, 13%, 15%, 17%, 20% relative to the total amount of the composition of the present invention. Relative to the total amount of the composition of the present invention, the upper limit of the preferred content is 35%, 30%, 28%, 25%, 23%, 20%, 18%, 15%, 13%.

The compound represented by general formula (N-1-16) is the following compound.

(In the formula, R ^N1161 and R ^N1162 each independently represent the same definition as ^{R N11} and R ^N12 in the general formula (N)).

R ^{N1161 is} preferably an alkyl group having 1 to 5 carbon atoms or an alkenyl group having 2 to 5 carbon atoms, and more preferably an ethyl group, a propyl group, or a butyl group. R ^{N1162 is} preferably an alkyl group with 1 to 5 carbon atoms, an alkenyl group with 4 to 5 carbon atoms, or an alkoxy group with 1 to 4 carbon atoms, more preferably ethoxy, propoxy or butoxy .

The compound represented by the general formula (N-1-16) may be used alone or in combination of two or more kinds of compounds. The types of compounds that can be combined are not particularly limited, but they are appropriately combined for use in accordance with the required properties such as solubility at low temperature, transition temperature, electrical reliability, and birefringence. The types of compounds used are, for example, 1 type, 2 types, 3 types, 4 types, 5 types or more in one embodiment of the present invention.

When the improvement of Δε is important, it is better to set the content higher. When the solubility at low temperature is important, the effect is high if the content is set more, and when the _{T NI is important, the effect is high if the content is set more.} Furthermore, when improving dripping marks or afterimage characteristics, it is preferable to set the content range in the middle.

The lower limit of the preferable content of the compound represented by formula (N-1-16) is 5%, 10%, 13%, 15%, 17%, 20% relative to the total amount of the composition of the present invention. Relative to the total amount of the composition of the present invention, the upper limit of the preferred content is 35%, 30%, 28%, 25%, 23%, 20%, 18%, 15%, 13%.

The compound represented by general formula (N-1-17) is the following compound.

(In the formula, R ^N1171 and R ^N1172 each independently represent the same definition as ^{R N11} and R ^N12 in the general formula (N)).

R ^{N1171 is} preferably an alkyl group having 1 to 5 carbon atoms or an alkenyl group having 2 to 5 carbon atoms, and more preferably an ethyl group, a propyl group, or a butyl group. R ^{N1172 is} preferably 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, more preferably ethoxy, propoxy or butoxy .

The compound represented by the general formula (N-1-17) may be used alone or in combination of two or more kinds of compounds. The types of compounds that can be combined are not particularly limited, but they can be appropriately combined for use in accordance with the required properties such as solubility at low temperature, transition temperature, electrical reliability, and birefringence. The type of the compound used is, for example, 1 type, 2 types, 3 types, 4 types, 5 types or more in one embodiment of the present invention.

When the improvement of Δε is important, it is better to set the content higher. When the solubility at low temperature is important, the effect is high if the content is set more, and when the _{T NI is important, the effect is high if the content is set more.} Furthermore, when improving dripping marks or afterimage characteristics, it is preferable to set the content range in the middle.

The lower limit of the preferable content of the compound represented by formula (N-1-17) is 5%, 10%, 13%, 15%, 17%, 20% relative to the total amount of the composition of the present invention. Relative to the total amount of the composition of the present invention, the upper limit of the preferred content is 35%, 30%, 28%, 25%, 23%, 20%, 18%, 15%, 13%.

The compound represented by general formula (N-1-18) is the following compound.

(In the formula, R ^N1181 and R ^N1182 each independently represent the same definition as ^{R N11} and R ^N12 in the general formula (N)).

R ^{N1181 is} preferably an alkyl group having 1 to 5 carbon atoms or an alkenyl group having 2 to 5 carbon atoms, and more preferably a methyl group, an ethyl group, a propyl group, or a butyl group. R ^{N1182 is} preferably 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, more preferably ethoxy, propoxy or butoxy .

The compound represented by the general formula (N-1-18) may be used alone or in combination of two or more kinds of compounds. The types of compounds that can be combined are not particularly limited, but they are appropriately combined for use in accordance with the required properties such as solubility at low temperature, transition temperature, electrical reliability, and birefringence. The type of the compound used is, for example, 1 type, 2 types, 3 types, 4 types, 5 types or more in one embodiment of the present invention.

When the improvement of Δε is important, it is better to set the content higher. When the solubility at low temperature is important, the effect is high if the content is set more, and when the _{T NI is important, the effect is high if the content is set more.} Furthermore, when improving dripping marks or afterimage characteristics, it is preferable to set the content range in the middle.

The lower limit of the preferable content of the compound represented by formula (N-1-18) is 5%, 10%, 13%, 15%, 17%, 20% relative to the total amount of the composition of the present invention. Relative to the total amount of the composition of the present invention, the upper limit of the preferred content is 35%, 30%, 28%, 25%, 23%, 20%, 18%, 15%, 13%.

Furthermore, the compound represented by general formula (N-1-18) is preferably a compound selected from the group of compounds represented by formula (N-1-18.1) to formula (N-1-18.5), more preferably The compounds represented by formulas (N-1-18.1) to (N-1-11.3) are particularly preferably compounds represented by formulas (N-1-18.2) and (N-1-18.3).

The compound represented by general formula (N-1-20) is the following compound.

(Wherein, R ^N1201 and ^{N1202 of} R each independently represents general formula (N) is the same as R and R defined ^{N11 N12).}

R ^N1201 and R ^N1202 are each independently preferably an alkyl group having 1 to 5 carbon atoms or an alkenyl group having 2 to 5 carbon atoms, and more preferably an ethyl group, a propyl group, or a butyl group.

The compound represented by the general formula (N-1-20) may be used alone or in combination of two or more kinds of compounds. The types of compounds that can be combined are not particularly limited, but they are appropriately combined for use in accordance with the required properties such as solubility at low temperature, transition temperature, electrical reliability, and birefringence. The type of the compound used is, for example, 1 type, 2 types, 3 types, 4 types, 5 types or more in one embodiment of the present invention.

When the improvement of Δε is important, it is better to set the content higher. When the solubility at low temperature is important, the effect is high if the content is set more, and when the _{T NI is important, the effect is high if the content is set more.} Furthermore, when improving dripping marks or afterimage characteristics, it is preferable to set the content range in the middle.

The lower limit of the preferable content of the compound represented by formula (N-1-20) is 5%, 10%, 13%, 15%, 17%, 20% relative to the total amount of the composition of the present invention. Relative to the total amount of the composition of the present invention, the upper limit of the preferred content is 35%, 30%, 28%, 25%, 23%, 20%, 18%, 15%, 13%.

The compound represented by general formula (N-1-21) is the following compound.

(In the formula, R ^N1211 and R ^N1212 each independently represent the same definition as ^{R N11} and R ^N12 in the general formula (N)).

R ^N1211 and R ^N1212 are each independently preferably an alkyl group having 1 to 5 carbon atoms or an alkenyl group having 2 to 5 carbon atoms, and more preferably an ethyl group, a propyl group, or a butyl group.

The compound represented by the general formula (N-1-21) may be used alone or in combination of two or more kinds of compounds. The types of compounds that can be combined are not particularly limited, but they are appropriately combined for use in accordance with the required properties such as solubility at low temperature, transition temperature, electrical reliability, and birefringence. The type of the compound used is, for example, 1 type, 2 types, 3 types, 4 types, 5 types or more in one embodiment of the present invention.

When the improvement of Δε is important, it is better to set the content higher. When the solubility at low temperature is important, the effect is high if the content is set more, and when the _{T NI is important, the effect is high if the content is set more.} Furthermore, when improving dripping marks or afterimage characteristics, it is preferable to set the content range in the middle.

The lower limit of the preferable content of the compound represented by formula (N-1-21) is 5%, 10%, 13%, 15%, 17%, 20% relative to the total amount of the composition of the present invention. Relative to the total amount of the composition of the present invention, the upper limit of the preferred content is 35%, 30%, 28%, 25%, 23%, 20%, 18%, 15%, 13%.

The compound represented by general formula (N-1-22) is the following compound.

(In the formula, R ^N1221 and R ^N1222 each independently represent the same definition as ^{R N11} and R ^N12 in the general formula (N)).

R ^N1221 and R ^N1222 are each independently preferably an alkyl group having 1 to 5 carbon atoms or an alkenyl group having 2 to 5 carbon atoms, and more preferably an ethyl group, a propyl group, or a butyl group.

The compound represented by the general formula (N-1-22) may be used alone or in combination of two or more kinds of compounds. The types of compounds that can be combined are not particularly limited, but they are appropriately combined for use in accordance with the required properties such as solubility at low temperature, transition temperature, electrical reliability, and birefringence. The type of the compound used is, for example, 1 type, 2 types, 3 types, 4 types, 5 types or more in one embodiment of the present invention.

When the improvement of Δε is important, it is better to set the content higher. When the solubility at low temperature is important, the effect is high if the content is set more, and when the _{T NI is important, the effect is high if the content is set more.} Furthermore, when improving dripping marks or afterimage characteristics, it is preferable to set the content range in the middle.

Relative to the total amount of the composition of the present invention, the lower limit of the preferred content of the compound represented by formula (N-1-21) is 1%, 5%, 10%, 13%, 15%, 17%, 20%. Relative to the total amount of the composition of the present invention, the upper limit value of the preferred content is 35%, 30%, 28%, 25%, 23%, 20%, 18%, 15%, 13%, 10%, 5 %.

Furthermore, the compound represented by general formula (N-1-22) is preferably a compound selected from the group of compounds represented by formula (N-1-22.1) to formula (N-1-22.12), more preferably The compounds represented by formulas (N-1-22.1) to (N-1-22.5) are particularly preferably compounds represented by formulas (N-1-22.1) to (N-1-22.4).

The liquid crystal composition of the present invention preferably contains one type or two or more types of compounds represented by the general formula (L). The compound represented by the general formula (L) corresponds to a compound having a substantially neutral dielectric (the value of Δε is -2 to 2).

However, the compounds represented by general formula (i), general formula (ii), general formula (N-1d) and general formula (N-1) are not included.

The compound system represented by the general formula (L) may be used alone or in combination. The types of compounds that can be combined are not particularly limited, but they are appropriately combined for use in accordance with desired properties such as solubility at low temperatures, transition temperature, electrical reliability, and birefringence. The type of compound used is, for example, one type in one embodiment of the present invention. Or, in another embodiment of the present invention, there are 2 types, 3 types, 4 types, 5 types, 6 types, 7 types, 8 types, 9 types, 10 types or more.

In the composition of the present invention, the content of the compound represented by the general formula (L) must be based on solubility at low temperature, transition temperature, electrical reliability, birefringence, process suitability, dripping marks, residual image, dielectric The required performance such as constant anisotropy can be adjusted appropriately.

The compound represented by the general formula (L) is a so-called non-polar compound in which Δε is around 0. Therefore, the number of polar groups such as halogen atoms in the molecule is preferably 2 or less, more preferably 1 or less. In order to improve the solubility with other liquid crystal compounds, it is preferably 1. When focusing on the viscosity, it is more It is better not to be replaced.

Relative to the total amount of the composition of the present invention, the lower limit of the preferred content of the compound represented by the general formula (L) is 1%, 10%, 20%, 30%, 40%, 50%, 55%, 60%, 65%, 70%, 75%, 80%. The upper limit of the preferred content is 95%, 85%, 75%, 65%, 55%, 45%, 35%, 25%.

Relative to the total amount of the composition of the present invention, the comparison of the compounds represented by general formula (i), general formula (ii), general formula (N-1d), general formula (N-1) and general formula (L) The lower limit of the optimum content is 1%, 10%, 20%, 30%, 40%, 50%, 55%, 60%, 65%, 70%, 75%, 80%. The upper limit of the preferred content is 95%, 85%, 75%, 65%, 55%, 45%, 35%, 25%.

When the viscosity of the composition of the present invention is kept low and a composition with a fast response speed is required, it is preferable that the above-mentioned lower limit value is high and the upper limit value is high. Furthermore, when the Tni of the composition of the present invention is kept high and a composition with good temperature stability is required, it is preferable that the above-mentioned lower limit value is high and the upper limit value is high. In addition, when it is desired to increase the dielectric constant anisotropy in order to maintain a low driving voltage, it is preferable to lower the above-mentioned lower limit value and the upper limit value to be lower.

When reliability is important, both R ^L1 and R ^{L2 are} preferably alkyl groups. When importance is placed on reducing the volatility of the compound, an alkoxy group is preferable. When the reduction in viscosity is important, at least one of them is preferably an alkenyl group.

The number of halogen atoms present in the molecule is preferably 0, 1, 2, or 3, more preferably 0 or 1, and preferably 1 when compatibility with other liquid crystal molecules is important.

烷等之飽和環結構時，較佳為直鏈狀之碳原子數1~5的烷基、直鏈狀之碳原子數1~4的烷氧基及直鏈狀之碳原子數2~5的烯基。為了使向列相安定化，碳原子及存在時氧原子之合計較佳為5以下，較佳為直鏈狀。 R ^L1 and R ^L2 , when the ring structure to which they are bonded is a phenyl group (aromatic), preferably a linear alkyl group with 1 to 5 carbon atoms, and a linear chain with 1 to 4 carbon atoms The alkoxy group and the alkenyl group with 4 to 5 carbon atoms, when the bonded ring structure is cyclohexane, piperan and two

In the case of a saturated ring structure such as alkane, it is preferably a linear alkyl group with 1 to 5 carbon atoms, a linear chain alkoxy group with 1 to 4 carbon atoms, and a linear chain with 2 to 5 carbon atoms.的alkenyl. In order to stabilize the nematic phase, the total of carbon atoms and oxygen atoms when present is preferably 5 or less, preferably linear.

As the alkenyl group, it is preferably selected from a group represented by any one of formula (R1) to formula (R5). (The black dots in each formula represent the carbon atoms in the ring structure).

When attaching importance to response speed, n ^{L1 is} preferably 0, in order to improve the upper limit temperature of the nematic phase, it is preferably 2 or 3, and in order to achieve a balance of these, it is preferably 1. Moreover, in order to satisfy the characteristics required as a composition, it is preferable to combine compounds of different values.

When it is required to increase Δn, A ^L1 , A ^L2, and A ^{L3 are} preferably aromatic. In order to improve the response speed, they are preferably aliphatic, and each independently represents trans 1,4-cyclohexylene, 1, 4-phenylene, 2-fluoro-1,4-phenylene, 3-fluoro-1,4-phenylene, 3,5-difluoro-1,4-phenylene, 1,4-phenylene Cyclohexenyl, 1,4-bicyclo[2.2.2]octylene, piperidine-1,4-diyl, naphthalene-2,6-diyl, decalin-2,6-diyl or 1 ,2,3,4-Tetrahydronaphthalene-2,6-diyl, more preferably represents the following structure,

More preferred is trans 1,4-cyclohexylene or 1,4-phenylene.

When the response speed is important, Z ^L1 and Z ^{L2 are} preferably single bonds.

The number of halogen atoms in the molecule of the compound represented by the general formula (L) is preferably zero or one.

The compound represented by general formula (L) is preferably a compound selected from the group of compounds represented by general formulas (L-1) to (L-7).

The compound represented by general formula (L-1) is the following compound.

(In the formula, R ^L11 and R ^L12 each independently represent the same definition as ^{R L1} and R ^L2 in the general formula (L)).

R ^L11 and R ^{L12 are} preferably linear alkyl groups having 1 to 5 carbon atoms, linear alkoxy groups having 1 to 4 carbon atoms, and linear alkenyl groups having 2 to 5 carbon atoms. .

The compound represented by the general formula (L-1) may be used alone or in combination of two or more kinds of compounds. The types of compounds that can be combined are not particularly limited, but they are appropriately combined for use in accordance with the required properties such as solubility at low temperature, transition temperature, electrical reliability, and birefringence. The type of the compound used is, for example, 1 type, 2 types, 3 types, 4 types, 5 types or more in one embodiment of the present invention.

Relative to the total amount of the composition of the present invention, the lower limit of the preferred content is 1%, 2%, 3%, 5%, 7%, 10%. Relative to the total amount of the composition of the present invention, the upper limit of the preferred content is 40%, 35%, 33%, 30%, 25%.

When the viscosity of the composition of the present invention is kept low and a composition with a fast response speed is required, it is preferable that the above-mentioned lower limit value is high and the upper limit value is high. Furthermore, when the Tni of the composition of the present invention is kept high and a composition with good temperature stability is required, it is preferable that the above-mentioned lower limit value is a mean value and the upper limit value is a mean value. Moreover, when it is desired to increase the dielectric constant anisotropy in order to maintain a low driving voltage, it is preferable that the above-mentioned lower limit value is low and the upper limit value is low. In order to improve the viewing angle characteristics, it is not advisable to increase the upper limit.

The compound represented by general formula (L-1) is preferably a compound selected from the group of compounds represented by general formula (L-1-1).

(In the formula, R ^L12 represents the same definition as in the general formula (L-1)).

The compound represented by general formula (L-1-1) is preferably a compound selected from the group of compounds represented by formula (L-1-1.1) to formula (L-1-1.3), more preferably formula (L The compound represented by -1-1.2) or formula (L-1-1.3) is particularly preferably a compound represented by formula (L-1-1.3).

The lower limit of the preferable content of the compound represented by formula (L-1-1.3) is 1%, 2%, 3%, 5%, 7%, 10% relative to the total amount of the composition of the present invention. Relative to the total amount of the composition of the present invention, the upper limit of the preferred content is 20%, 15%, 13%, 10%, 8%, 7%, 6%, 5%, 3%.

The compound represented by general formula (L-1) is preferably a compound selected from the group of compounds represented by general formula (L-1-2).

(In the formula, R ^L12 represents the same definition as in the general formula (L-1)).

Relative to the total amount of the composition of the present invention, the lower limit of the preferred content of the compound represented by formula (L-1-2) is 1%, 5%, 10%, 15%, 17%, 20%, 23%, 25%, 27%, 30%, 35%. Relative to the total amount of the composition of the present invention, the upper limit of the preferred content is 60%, 55%, 50%, 45%, 42%, 40%, 38%, 35%, 33%, 30%.

Furthermore, the compound represented by general formula (L-1-2) is preferably a compound selected from the group of compounds represented by formula (L-1-2.1) to formula (L-1-2.4), preferably Compounds represented by formula (L-1-2.2) to formula (L-1-2.4). In particular, in order to improve the response speed of the composition of the present invention, the compound represented by the formula (L-1-2.2) is preferred. Furthermore, when a Tni higher than the response speed is required, it is preferable to use a compound represented by formula (L-1-2.3) or formula (L-1-2.4). In order to improve the solubility at low temperatures, the content of the compound represented by formula (L-1-2.3) and formula (L-1-2.4) should not be 30% or more.

Relative to the total amount of the composition of the present invention, the lower limit of the preferred content of the compound represented by formula (L-1-2.2) is 10%, 15%, 18%, 20%, 23%, 25%, 27%, 30%, 33%, 35%, 38%, 40%. Relative to the total amount of the composition of the present invention, the upper limit value of the preferred content is 60%, 55%, 50%, 45%, 43%, 40%, 38%, 35%, 32%, 30%, 27 %, 25%, 22%.

The lower limit of the total content of the compound represented by formula (L-1-1.3) and the compound represented by formula (L-1-2.2) is preferably 10%, 15% relative to the total amount of the composition of the present invention. %, 20%, 25%, 27%, 30%, 35%, 40%. Relative to the total amount of the composition of the present invention, the upper limit value of the preferred content is 60%, 55%, 50%, 45%, 43%, 40%, 38%, 35%, 32%, 30%, 27 %, 25%, 22%.

The compound represented by general formula (L-1) is preferably a compound selected from the group of compounds represented by general formula (L-1-3).

(In the formula, R ^L13 and R ^L14 each independently represent an alkyl group having 1 to 8 carbon atoms or an alkoxy group having 1 to 8 carbon atoms).

R ^L13 and R ^{L14 are} preferably linear alkyl groups having 1 to 5 carbon atoms, linear alkoxy groups having 1 to 4 carbon atoms, and linear alkenyl groups having 2 to 5 carbon atoms. .

Relative to the total amount of the composition of the present invention, the lower limit of the preferred content of the compound represented by formula (L-1-3) is 1%, 5%, 10%, 13%, 15%, 17%, 20%, 23%, 25%, 30%. Relative to the total amount of the composition of the present invention, the upper limit of the preferred content is 60%, 55%, 50%, 45%, 40%, 37%, 35%, 33%, 30%, 27%, 25 %, 23%, 20%, 17%, 15%, 13%, 10%.

Furthermore, the compound represented by general formula (L-1-3) is preferably a compound selected from the group of compounds represented by formula (L-1-3.1) to formula (L-1-3.12), more preferably A compound represented by formula (L-1-3.1), formula (L-1-3.3), or formula (L-1-3.4). In particular, in order to improve the response speed of the composition of the present invention, the compound represented by the formula (L-1-3.1) is preferred. In addition, when a Tni higher than the response speed is required, it is preferable to use the formula (L-1-3.3), formula (L-1-3.4), formula (L-1-3.11), and formula (L-1-3.12). ) The compound shown. In order to achieve good solubility at low temperatures, the total of the compounds represented by formula (L-1-3.3), formula (L-1-3.4), formula (L-1-3.11) and formula (L-1-3.12) The content should not be more than 20%.

Relative to the total amount of the composition of the present invention, the lower limit of the preferred content of the compound represented by formula (L-1-3.1) is 1%, 2%, 3%, 5%, 7%, 10%, 13%, 15%, 18%, 20%. Relative to the total amount of the composition of the present invention, the upper limit value of the preferred content is 20%, 17%, 15%, 13%, 10%, 8%, 7%, 6%.

The compound represented by general formula (L-1) is preferably a compound selected from the group of compounds represented by general formula (L-1-4) and/or (L-1-5).

(In the formula, R ^L15 and R ^L16 each independently represent an alkyl group having 1 to 8 carbon atoms or an alkoxy group having 1 to 8 carbon atoms).

R ^L15 and R ^{L16 are} preferably linear alkyl having 1 to 5 carbon atoms, linear alkoxy having 1 to 4 carbon atoms, and linear alkenyl having 2 to 5 carbon atoms .

Relative to the total amount of the composition of the present invention, the lower limit of the preferred content of the compound represented by formula (L-1-4) is 1%, 5%, 10%, 13%, 15%, 17%, 20%. Relative to the total amount of the composition of the present invention, the upper limit of the preferred content is 25%, 23%, 20%, 17%, 15%, 13%, 10%.

Relative to the total amount of the composition of the present invention, the lower limit of the preferred content of the compound represented by formula (L-1-5) is 1%, 5%, 10%, 13%, 15%, 17%, 20%. Relative to the total amount of the composition of the present invention, the upper limit of the preferred content is 25%, 23%, 20%, 17%, 15%, 13%, 10%.

Furthermore, the compounds represented by general formulas (L-1-4) and (L-1-5) are preferably a group of compounds represented by formula (L-1-4.1) to formula (L-1-5.3) The selected compound is more preferably a compound represented by formula (L-1-4.2) or formula (L-1-5.2).

Relative to the total amount of the composition of the present invention, the lower limit of the preferred content of the compound represented by formula (L-1-4.2) is 1%, 2%, 3%, 5%, 7%, 10%, 13%, 15%, 18%, 20%. Relative to the total amount of the composition of the present invention, the upper limit value of the preferred content is 20%, 17%, 15%, 13%, 10%, 8%, 7%, 6%.

Preferably, the combination consists of formula (L-1-1.3), formula (L-1-2.2), formula (L-1-3.1), formula (L-1-3.3), formula (L-1-3.4), Two or more compounds selected from the compounds represented by formula (L-1-3.11) and formula (L-1-3.12), more preferably a combination of formula (L-1-1.3), formula (L-1- 2.2), two or more compounds selected from the compounds represented by formula (L-1-3.1), formula (L-1-3.3), formula (L-1-3.4) and formula (L-1-4.2) , Relative to the total amount of the composition of the present invention, the lower limit of the total content of these compounds is preferably 1%, 2%, 3%, 5%, 7%, 10%, 13%, 15% , 18%, 20%, 23%, 25%, 27%, 30%, 33%, 35%, relative to the total amount of the composition of the present invention, the upper limit value is 80%, 70%, 60%, 50 %, 45%, 40%, 37%, 35%, 33%, 30%, 28%, 25%, 23%, 20%. When the reliability of the composition is important, it is preferable to combine two or more selected compounds represented by formula (L-1-3.1), formula (L-1-3.3) and formula (L-1-3.4)) When attaching importance to the response speed of the composition, it is preferable to combine two or more compounds selected from the compounds represented by formula (L-1-1.3) and formula (L-1-2.2).

The compound represented by general formula (L-1) is preferably a compound selected from the group of compounds represented by general formula (L-1-6).

(In the formula, R ^L17 and R ^L18 each independently represent a methyl group or a hydrogen atom).

Relative to the total amount of the composition of the present invention, the lower limit of the preferred content of the compound represented by formula (L-1-6) is 1%, 5%, 10%, 15%, 17%, 20%, 23%, 25%, 27%, 30%, 35%. Relative to the total amount of the composition of the present invention, the upper limit of the preferred content is 60%, 55%, 50%, 45%, 42%, 40%, 38%, 35%, 33%, 30%.

Furthermore, the compound represented by general formula (L-1-6) is preferably a compound selected from the group of compounds represented by formula (L-1-6.1) to formula (L-1-6.3).

The compound represented by general formula (L-2) is the following compound.

(Wherein, R ^L21 and R ^L22 each independently represents general formula (L) is the same as defined in R ^L1 and R ^L2).

R ^{L21 is} preferably an alkyl group having 1 to 5 carbon atoms or an alkenyl group having 2 to 5 carbon atoms, and R ^{L22 is} preferably 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 general formula (L-1) may be used alone or in combination of two or more kinds of compounds. The types of compounds that can be combined are not particularly limited, but they are appropriately combined for use in accordance with the required properties such as solubility at low temperature, transition temperature, electrical reliability, and birefringence. The type of the compound used is, for example, 1 type, 2 types, 3 types, 4 types, 5 types or more in one embodiment of the present invention.

When the solubility at low temperature is important, the effect is high if the content is set more, and on the contrary, when the content is set less, the effect is high if the response speed is important. Furthermore, when improving dripping marks or afterimage characteristics, it is preferable to set the content range in the middle.

The lower limit of the preferable content of the compound represented by formula (L-2) is 1%, 2%, 3%, 5%, 7%, 10% relative to the total amount of the composition of the present invention. Relative to the total amount of the composition of the present invention, the upper limit of the preferred content is 20%, 15%, 13%, 10%, 8%, 7%, 6%, 5%, 3%.

Furthermore, the compound represented by general formula (L-2) is preferably a compound selected from the group of compounds represented by formula (L-2.1) to formula (L-2.6), more preferably formula (L-2.1) , Compounds represented by formula (L-2.3), formula (L-2.4) and formula (L-2.6).

The compound represented by general formula (L-3) is the following compound.

(Wherein, R ^L31 and R ^L32 each independently represents general formula (L) is the same as defined in R ^L1 and R ^L2).

R ^L31 and R ^L32 are each independently preferably 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 general formula (L-3) may be used alone or in combination of two or more kinds of compounds. The types of compounds that can be combined are not particularly limited, but they are appropriately combined for use in accordance with the required properties such as solubility at low temperature, transition temperature, electrical reliability, and birefringence. The type of the compound used is, for example, 1 type, 2 types, 3 types, 4 types, 5 types or more in one embodiment of the present invention.

The lower limit of the preferable content of the compound represented by formula (L-3) is 1%, 2%, 3%, 5%, 7%, 10% relative to the total amount of the composition of the present invention. Relative to the total amount of the composition of the present invention, the upper limit of the preferred content is 20%, 15%, 13%, 10%, 8%, 7%, 6%, 5%, 3%.

When a high birefringence is obtained, the effect is high if the content is set more, and on the contrary, when the high Tni is emphasized, the effect is high if the content is set less. Furthermore, when improving dripping marks or afterimage characteristics, it is preferable to set the content range in the middle.

Furthermore, the compound represented by general formula (L-3) is preferably a compound selected from the group of compounds represented by formula (L-3.3) or formula (L-3.4).

The compound represented by general formula (L-4) is the following compound.

(Wherein, R ^L41 and R ^L42 each independently represents general formula (L) is the same as defined in R ^L1 and R ^L2).

R ^{L41 is} preferably an alkyl group having 1 to 5 carbon atoms or an alkenyl group having 2 to 5 carbon atoms, and R ^{L42 is} preferably an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 4 to 5 carbon atoms, or Alkoxy group having 1 to 4 carbon atoms).

The compound represented by the general formula (L-4) may be used alone or in combination of two or more kinds of compounds. The types of compounds that can be combined are not particularly limited, but they are appropriately combined and used according to the required properties such as solubility at low temperature, transition temperature, electrical reliability, and birefringence. The type of the compound used is, for example, 1 type, 2 types, 3 types, 4 types, 5 types or more in one embodiment of the present invention.

In the composition of the present invention, the content of the compound represented by the general formula (L-4) must be based on solubility at low temperature, transition temperature, electrical reliability, birefringence, process suitability, dripping marks, residual image, The required performance such as dielectric anisotropy can be adjusted appropriately.

Relative to the total amount of the composition of the present invention, the lower limit of the preferred content of the compound represented by formula (L-4) is 1%, 2%, 3%, 5%, 7%, 10%, 14% , 16%, 20%, 23%, 26%, 30%, 35%, 40%. Relative to the total amount of the composition of the present invention, the upper limit of the preferred content of the compound represented by formula (L-4) is 50%, 40%, 35%, 30%, 20%, 15%, 10% , 5%.

The compound represented by general formula (L-4) is preferably a compound represented by formula (L-4.1) to formula (L-4.3), for example.

According to the required performance of solubility at low temperature, transition temperature, electrical reliability, birefringence, etc., it may also contain the compound represented by formula (L-4.1) or the compound represented by formula (L-4.2) , May also contain both the compound represented by formula (L-4.1) and the compound represented by formula (L-4.2), and may also contain all the compounds represented by formula (L-4.1) to formula (L-4.3) . Relative to the total amount of the composition of the present invention, the lower limit of the preferred content of the compound represented by formula (L-4.1) or formula (L-4.2) is 3%, 5%, 7%, 9%, 11 %, 12%, 13%, 18%, 21%, the preferred upper limit value is 45%, 40%, 35%, 30%, 25%, 23%, 20%, 18%, 15%, 13% , 10%, 8%.

When both of the compound represented by formula (L-4.1) and the compound represented by formula (L-4.2) are contained, the lower limit of the preferable content of the two compounds is 15 relative to the total amount of the composition of the present invention %, 19%, 24%, 30%, the preferred upper limit value is 45%, 40%, 35%, 30%, 25%, 23%, 20%, 18%, 15%, 13%.

The compound represented by general formula (L-4) is preferably a compound represented by formula (L-4.4) to formula (L-4.6), and more preferably a compound represented by formula (L-4.4), for example.

According to the required performance of solubility at low temperature, transition temperature, electrical reliability, birefringence, etc., it may also contain the compound represented by the formula (L-4.4) or the compound represented by the formula (L-4.5) , May contain both the compound represented by formula (L-4.4) and the compound represented by formula (L-4.5).

Relative to the total amount of the composition of the present invention, the lower limit of the preferred content of the compound represented by formula (L-4.4) or formula (L-4.5) is 3%, 5%, 7%, 9%, 11 %, 12%, 13%, 18%, 21%. The preferred upper limit value is 45%, 40%, 35%, 30%, 25%, 23%, 20%, 18%, 15%, 13%, 10%, 8%.

When both of the compound represented by formula (L-4.4) and the compound represented by formula (L-4.5) are contained, the lower limit of the preferable content of the two compounds is 15 relative to the total amount of the composition of the present invention %, 19%, 24%, 30%, the preferred upper limit value is 45%, 40%, 35%, 30%, 25%, 23%, 20%, 18%, 15%, 13%.

The compound represented by general formula (L-4) is preferably a compound represented by formula (L-4.7) to formula (L-4.10), and particularly preferably a compound represented by formula (L-4.9).

The compound represented by general formula (L-5) is the following compound.

(Wherein, R ^L51 and R ^L52 each independently represents general formula (L) is the same as defined in R ^L1 and R ^L2).

R ^{L51 is} preferably an alkyl group having 1 to 5 carbon atoms or an alkenyl group having 2 to 5 carbon atoms, and R ^{L52 is} preferably 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 general formula (L-5) may be used alone or in combination of two or more kinds of compounds. The types of compounds that can be combined are not particularly limited, but they are appropriately combined for use in accordance with the required properties such as solubility at low temperature, transition temperature, electrical reliability, and birefringence. The type of the compound used is, for example, 1 type, 2 types, 3 types, 4 types, 5 types or more in one embodiment of the present invention.

In the composition of the present invention, the content of the compound represented by the general formula (L-5) must be based on solubility at low temperature, transition temperature, electrical reliability, birefringence, process suitability, dripping marks, residual image, The required performance such as dielectric anisotropy can be adjusted appropriately.

Relative to the total amount of the composition of the present invention, the lower limit of the preferred content of the compound represented by formula (L-5) is 1%, 2%, 3%, 5%, 7%, 10%, 14% , 16%, 20%, 23%, 26%, 30%, 35%, 40%. Relative to the total amount of the composition of the present invention, the upper limit of the preferred content of the compound represented by formula (L-5) is 50%, 40%, 35%, 30%, 20%, 15%, 10% , 5%.

The compound represented by general formula (L-5) is preferably a compound represented by formula (L-5.1) or formula (L-5.2), and particularly preferably a compound represented by formula (L-5.1).

Relative to the total amount of the composition of the present invention, the lower limit of the preferable content of these compounds is 1%, 2%, 3%, 5%, 7%. The upper limit of the preferred content of these compounds is 20%, 15%, 13%, 10%, 9%.

The compound represented by general formula (L-5) is preferably a compound represented by formula (L-5.3) or formula (L-5.4).

Relative to the total amount of the composition of the present invention, the lower limit of the preferable content of these compounds is 1%, 2%, 3%, 5%, 7%. The upper limit of the preferred content of these compounds is 20%, 15%, 13%, 10%, 9%.

The compound represented by general formula (L-5) is preferably a compound selected from the group of compounds represented by formula (L-5.5) to formula (L-5.7), and particularly preferably a compound represented by formula (L-5.7) Compound.

Relative to the total amount of the composition of the present invention, the lower limit of the preferable content of these compounds is 1%, 2%, 3%, 5%, 7%. The upper limit of the preferred content of these compounds is 20%, 15%, 13%, 10%, 9%.

The compound represented by general formula (L-6) is the following compound.

(In the formula, R ^L61 and R ^L62 each independently represent the same definition as ^{R L1} and R ^L2 in the general formula (L), ^{and X L61} and X ^L62 each independently represent a hydrogen atom or a fluorine atom).

R ^L61 and R ^L62 are each independently preferably an alkyl group having 1 to 5 carbon atoms or an alkenyl group having 2 to 5 carbon atoms, preferably one of X ^L61 and X ^L62 is a fluorine atom, and the other It is a hydrogen atom.

The compound represented by the general formula (L-6) may be used alone or in combination of two or more kinds of compounds. The types of compounds that can be combined are not particularly limited, but they are appropriately combined for use in accordance with the required properties such as solubility at low temperature, transition temperature, electrical reliability, and birefringence. The type of the compound used is, for example, 1 type, 2 types, 3 types, 4 types, 5 types or more in one embodiment of the present invention.

Relative to the total amount of the composition of the present invention, the lower limit of the preferred content of the compound represented by formula (L-6) is 1%, 2%, 3%, 5%, 7%, 10%, 14% , 16%, 20%, 23%, 26%, 30%, 35%, 40%. Relative to the total amount of the composition of the present invention, the upper limit of the preferred content of the compound represented by formula (L-6) is 50%, 40%, 35%, 30%, 20%, 15%, 10% , 5%. When the focus is on increasing △n, the content should be increased, and when the focus is on precipitation at low temperature, the content should be less.

The compound represented by general formula (L-6) is preferably a compound represented by formula (L-6.1) to formula (L-6.9).

The types of compounds that can be combined are not particularly limited, but it is preferable to contain one to three types of these compounds, and more preferably to contain one to four types. In addition, since the selected compound has a wide molecular weight distribution, it is also effective in solubility, so for example, it is preferable to select one type from the compound represented by the formula (L-6.1) or (L-6.2), and from the formula (L-6.4 One type is selected from the compound represented by) or (L-6.5), one type is selected from the compound represented by formula (L-6.6) or formula (L-6.7), and one type is selected from formula (L-6.8) or (L-6.9) One type of compound is selected from the compounds shown, and these are suitably combined. Among them, it is preferable to include compounds represented by formula (L-6.1), formula (L-6.3), formula (L-6.4), formula (L-6.6) and formula (L-6.9).

Furthermore, the compound represented by the general formula (L-6) is preferably, for example, the compound represented by the formula (L-6.10) to the formula (L-6.17), and among them, the compound represented by the formula (L-6.11) is preferred .

Relative to the total amount of the composition of the present invention, the lower limit of the preferable content of these compounds is 1%, 2%, 3%, 5%, 7%. The upper limit of the preferred content of these compounds is 20%, 15%, 13%, 10%, 9%.

The compound represented by general formula (L-7) is the following compound.

(Wherein, R ^L71 and R ^L72 each independently represents general formula (L) is the same as the definition of R ^L1 and R ^L2, A ^L71 and A ^L72 each independently represents general formula (L) and the A ^L2 A ^{L3 has the} same definition, but ^{the hydrogen atoms on A L71} and A ^L72 can be independently substituted by fluorine atoms. Z ^L71 represents the same definition ^{as Z L2} in the general formula (L), ^{and X L71} and X ^L72 are each independently Represents a fluorine atom or a hydrogen atom).

In the formula, R ^L71 and R ^L72 are each independently preferably 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, A ^L71 and A ^L72 Each independently is preferably 1,4-cyclohexylene or 1,4-phenylene, ^{the hydrogen atoms on A L71} and A ^L72 may be independently substituted by fluorine atoms, and Z ^{L71 is} preferably a single bond or COO- , More preferably a single bond, and X ^L71 and X ^{L72 are} preferably hydrogen atoms.

The types of compounds that can be combined are not particularly limited, but they are combined according to the required properties such as solubility at low temperature, transition temperature, electrical reliability, and birefringence. The types of compounds used are, for example, one type, two types, three types, and four types in one embodiment of the present invention.

In the composition of the present invention, the content of the compound represented by the general formula (L-7) must be based on solubility at low temperature, transition temperature, electrical reliability, birefringence, process suitability, dripping marks, residual image, The required performance such as dielectric anisotropy can be adjusted appropriately.

Relative to the total amount of the composition of the present invention, the lower limit of the preferred content of the compound represented by formula (L-7) is 1%, 2%, 3%, 5%, 7%, 10%, 14% , 16%, 20%. Relative to the total amount of the composition of the present invention, the upper limit of the preferred content of the compound represented by formula (L-7) is 30%, 25%, 23%, 20%, 18%, 15%, 10% , 5%.

When a high Tni embodiment is desired for the composition of the present invention, it is preferable to increase the content of the compound represented by formula (L-7), and when a low viscosity embodiment is desired, it is preferable to decrease the content.

Furthermore, the compound represented by general formula (L-7) is preferably a compound represented by formula (L-7.1) to formula (L-7.4), and more preferably a compound represented by formula (L-7.2).

Furthermore, the compound represented by general formula (L-7) is preferably a compound represented by formula (L-7.11) to formula (L-7.13), and more preferably a compound represented by formula (L-7.11).

Furthermore, the compound represented by general formula (L-7) is a compound represented by formula (L-7.21) to formula (L-7.23). Preferably, it is a compound represented by formula (L-7.21).

Furthermore, the compound represented by the general formula (L-7) is preferably the compound represented by the formula (L-7.31) to the formula (L-7.34), more preferably the formula (L-7.31) or/and the formula (L-7.31) -7.32) The compound shown in.

Furthermore, the compound represented by the general formula (L-7) is preferably the compound represented by the formula (L-7.41) to the formula (L-7.44), more preferably the formula (L-7.41) or/and the formula (L-7.41) -7.42) The compound shown in.

Furthermore, the compound represented by general formula (L-7) is preferably a compound represented by formula (L-7.51) to formula (L-7.53).

The total of the compounds represented by general formula (i), general formula (ii), general formula (N-1d), general formula (N-1) and general formula (L) relative to the total amount of the composition of the present invention The lower limit of the preferred content is 80%, 85%, 88%, 90%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, 99%, 100%. The upper limit of the preferred content is 100%, 99%, 98%, 95%.

The conventional composition is a combination of the compound having a bicyclohexane skeleton represented by the formula (L-1-3.1) of the present case and the compound having a biphenyl skeleton represented by the formula (ii-3), but the composition of the present case Use compounds represented by general formulas (i) and (ii), and further use compounds represented by general formula (N-1d), general formula (N-1) and general formula (L), by containing specified amounts of The compounds represented by general formulas (i) and (ii) are further adjusted so-called neutral compounds (compounds represented by general formula (i), compounds represented by general formula (ii), and compounds represented by general formula (L) The content of the compound represented by the general formula (i) and (ii) in the compound) solves the problem of this case.

Compounds represented by general formulas (i) and (ii) in neutral compounds (compounds represented by general formula (i), compounds represented by general formula (ii), and compounds represented by general formula (L)) The lower limit of the total preferable content is 20%, 25%, 30%, 35%, 38%, 40%, 42%, 45%. The preferred upper limit values are 70%, 65%, 63%, 60%, 58%, 56%, 55%.

With respect to the total amount of the composition of the present invention, the lower limit of the total content of the compounds represented by general formula (i), general formula (ii) and general formula (L-4.4) is 8%, 10%, 13%, 15%, 20%. The upper limit of the preferred content is 50%, 45%, 43%, 40%, 38%, 35%. Neutral compounds (compounds represented by general formula (i), compounds represented by general formula (ii), and compounds represented by general formula (L)) in general formula (i), general formula (ii) and general formula The lower limit of the total preferable content of the compound represented by formula (L-4.4) is 20%, 25%, 30%, 35%, 38%, 40%, 42%, 45%. The preferred upper limit values are 70%, 65%, 63%, 60%, 58%, 56%, 55%.

In the composition of the present case, as a combination of neutral compounds, it is preferable to combine compounds represented by general formulas (i), (ii), (L-1), (L-4) and (L-5).

Neutral compounds (compounds represented by general formula (i), compounds represented by general formula (ii), and compounds represented by general formula (L)) 5) The lower limit of the total preferable content of the compounds shown is 20%, 25%, 30%, 35%, 38%, 40%, 42%, 45%. The preferred upper limit values are 70%, 65%, 63%, 60%, 58%, 56%, 55%.

With respect to the total amount of the composition of the present invention, the upper limit of the total preferable content of the compound having alkenyl groups is 30%, 25%, 20%, 15%, 13%, 10%, 8%, 5%, 3%, 2%, 1%, preferably not contained substantially. If a compound having an alkenyl group is contained, it is effective in improving the response speed, but from the viewpoint of reliability and wavelength dispersion of Δn, the content is preferably small.

With respect to the total amount of the composition of the present invention, the upper limit of the total preferable content of the compound represented by the general formula (N-1d) and the compound represented by the general formula (N-1) having an alkenyl group is 20%, 18%, 15%, 13%, 10%, 8%, 5%, 3%, 2%, 1%, and preferably not substantially contained. If a compound having an alkenyl group is contained, it is effective in improving the response speed, but from the viewpoint of reliability and wavelength dispersion of Δn, the content is preferably small.

The composition of the present invention preferably does not contain a compound having a structure in which oxygen atoms such as a peracid (-CO-OO-) structure are bonded to each other in the molecule.

When attaching importance to the reliability and long-term stability of the composition, relative to the total mass of the aforementioned composition, the content of the compound having a carbonyl group is preferably set to 5% or less, more preferably 3% or less, and particularly preferably 1% or less , It is best to not contain substantially.

When attaching importance to the stability of UV radiation, the content of the compound substituted with chlorine atoms relative to the total mass of the aforementioned composition is preferably set to 15% or less, more preferably 10% or less, particularly preferably 8% or less, especially It is preferably 5% or less, more preferably 3% or less, and particularly preferably not substantially contained.

It is preferable to increase the content of compounds whose intramolecular ring structures are all 6-membered rings. Relative to the total mass of the aforementioned composition, the content of compounds whose intramolecular ring structures are all 6-membered rings is preferably set to 80% or more. More preferably, it is set to 90% or more, particularly preferably 95% or more, and it is most preferable to substantially constitute the composition only with compounds whose intramolecular ring structures are all 6-membered rings.

In order to improve the dispersion and stability of the composition, it is preferable to increase the content of compounds whose side chains are alkyl groups and alkoxy groups, relative to the total mass of the aforementioned composition, the content of compounds whose side chains are alkyl groups and alkoxy groups It is preferably set to 85% or more, more preferably 87% or more, more preferably 90% or more, particularly preferably 93% or more, even more preferably 95% or more, particularly preferably 98% or more, The best setting is substantially 100%. The term "substantially 100%" means that it is 100% excluding the polymerizable compound, stabilizer, and additional impurities.

In order to suppress the degradation of the composition due to oxidation, it is preferable to reduce the content of the compound having a cyclohexenylene group as a ring structure, and the content of the compound having a cyclohexenylene group is preferable relative to the total mass of the aforementioned composition It is set to 10% or less, more preferably 8% or less, particularly preferably 5% or less, even more preferably 3% or less, and particularly preferably not substantially contained.

When attaching importance to the improvement of viscosity and the improvement of Tni, it is preferable to reduce the content of 2-methylbenzene-1,4-diyl compounds with hydrogen atoms in the molecule that can be substituted with halogens, relative to the total of the aforementioned compositions. Mass, the content of the aforementioned compound having 2-methylbenzene-1,4-diyl group in the molecule is preferably set to 10% or less, more preferably 8% or less, particularly preferably 5% or less, and more preferably It is set to 3% or less, and it is particularly preferable to not contain it substantially.

The so-called non-contained substance in this case means that it does not contain anything accidentally contained.

When the compound contained in the composition of the first embodiment of the present invention has an alkenyl group as a side chain, in the case where the aforementioned alkenyl group is bonded to cyclohexane, the number of carbon atoms of the alkenyl group is preferably 2~ 5. In the case where the aforementioned alkenyl group is bonded to benzene, the number of carbon atoms of the alkenyl group is preferably 4 to 5, and the unsaturated bond of the aforementioned alkenyl group is preferably not directly bonded to benzene.

_{The average elastic constant (K AVG} ) of the liquid crystal composition used in the present invention is preferably 10 to 25, and as its lower limit, it is preferably 10, preferably 10.5, preferably 11, and preferably 11.5, which is more Preferably it is 12, preferably 12.3, preferably 12.5, preferably 12.8, preferably 13, preferably 13.3, preferably 13.5, preferably 13.8, preferably 14, preferably 14.3, more Preferably it is 14.5, preferably 14.8, preferably 15, preferably 15.3, preferably 15.5, preferably 15.8, preferably 16, preferably 16.3, preferably 16.5, preferably 16.8, more Preferably it is 17, preferably 17.3, preferably 17.5, preferably 17.8, preferably 18, and as the upper limit thereof, it is preferably 25, preferably 24.5, preferably 24, preferably 23.5, Preferably it is 23, preferably 22.8, preferably 22.5, preferably 22.3, preferably 22, preferably 21.8, preferably 21.5, preferably 21.3, preferably 21, preferably 20.8, Preferably it is 20.5, preferably 20.3, preferably 20, preferably 19.8, preferably 19.5, preferably 19.3, preferably 19, preferably 18.8, preferably 18.5, preferably 18.3, Preferably it is 18, preferably 17.8, preferably 17.5, preferably 17.3, preferably 17. When emphasis is placed on reducing power consumption, it is effective to suppress the amount of light from the backlight, and it is preferable for the liquid crystal display element to increase the light transmittance. Therefore, it is preferable to set the value of _{K AVG lower.} When the improvement of response speed is important, it is better to set the value of _{K AVG higher.}

The composition of the present invention may contain a polymerizable compound in order to produce a liquid crystal display element such as a PS mode, a horizontal electric field type PSA mode, or a horizontal electric field type PSVA mode. Examples of polymerizable compounds that can be used include photopolymerizable monomers polymerized by energy rays such as light. Examples of the structure include biphenyl derivatives and terphenyl derivatives having six members. The ring is a polymerizable compound with a plurality of connected liquid crystal skeletons, etc. More specifically, it is preferably a difunctional monomer represented by the general formula (XX)

(In the formula, X ²⁰¹ and X ²⁰² each independently represent a hydrogen atom or a methyl group, and Sp ²⁰¹ and Sp ²⁰² each independently represent a single bond, an alkylene group with 1 to 8 carbon atoms, or -O-(CH ₂ ) _s -(In the formula, s represents an integer from 2 to 7, and the oxygen atom is bonded to the aromatic ring) is preferably, Z ²⁰¹ 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 bond, M ²⁰¹ represents 1,4-phenylene, trans 1,4-cyclohexylene or a single bond. All 1,4-phenylene groups in the formula can be replaced by fluorine atoms or carbon. It is substituted by an alkyl group having 1 to 3 and/or an alkoxy group having 1 to 2 carbons).

Preferably, X ²⁰¹ and X ^{202 both} represent a diacrylate derivative of a hydrogen atom, or a dimethacrylate derivative of which both have a methyl group. It is also preferred that one of them represents a hydrogen atom and the other Represents a compound of methyl. The polymerization rate of these compounds is the fastest for diacrylate derivatives, and the slowest for dimethacrylate derivatives. Asymmetric compounds are among them, and the preferred form can be used according to their use. Among PSA display devices, dimethacrylate derivatives are particularly preferred.

Sp ²⁰¹ and Sp ²⁰² each independently represent a single bond, an alkylene having 1 to 8 carbon atoms, or -O-(CH ₂ ) _s -. However, in PSA display elements, it is preferred that at least one is a single bond. It is preferably a compound in which both represent a single bond, or one of which is a single bond and the other represents an alkylene having 1 to 8 carbon atoms or -O-(CH ₂ ) _s -. In this case, it is preferably an alkyl group of 1 to 4, and s is preferably 1 to 4.

Z ^{201 is} preferably -OCH ₂ -, -CH ₂ O-, -COO-, -OCO-, -CF ₂ O-, -OCF ₂ -, -CH ₂ CH ₂ -, -CF ₂ CF ₂ -or single The bond is more preferably -COO-, -OCO- or a single bond, particularly preferably a single bond.

M ²⁰¹ represents a 1,4-phenylene group, trans 1,4-cyclohexylene group or a single bond in which any hydrogen atom can be replaced by a fluorine atom, preferably 1,4-phenylene group or a single bond. When C represents a ring structure other than a single bond, Z ^{201 is} also preferably a linking group other than a single bond. When M ²⁰¹ is a single bond, Z ^{201 is} preferably a single bond.

Based on these points, in the general formula (XX), ^{the ring structure between Sp 201} and Sp ²⁰² is specifically preferably the structure described below.

In the general formula (XX), M ²⁰¹ represents a single bond, and when the ring structure is formed by two rings, it preferably represents the following formula (XXa-1) to formula (XXa-7), more preferably represents the formula (XXa- 1) To formula (XXa-3), formula (XXa-6) to formula (XXa-7), particularly preferably expressing formula (XXa-1), formula (XXa-2) or formula (XXa-6).

(In the formula, both ends are bonded to Sp ²⁰¹ or Sp ²⁰² ).

The polymerizable compound containing such a skeleton is most suitable for PSA-type liquid crystal display elements due to the alignment control force after polymerization, and a good alignment state is obtained, so display unevenness is suppressed or does not occur at all.

Based on the above, as the polymerizable monomer, the general formula (XX-1) to the general formula (XX-4) are particularly preferred, and the general formula (XX-2) is most preferred.

(In the formula, benzene may be substituted with a fluorine atom, an alkyl group having 1 to 3 carbon atoms, and/or an alkoxy group having 1 to 2 ^{carbon atoms, and Sp 20} represents an alkylene group having 2 to 5 carbon atoms).

When a monomer is added to the composition of the present invention, the polymerization proceeds even when the polymerization initiator is not present, but in order to promote the polymerization, the polymerization initiator may be contained. Examples of the polymerization initiator include benzoin ethers, diphenyl ketones, acetophenones, benzyl ketals, phosphine oxides, and the like.

The composition in the present invention may further contain a compound represented by general formula (Q).

(In the formula, R ^Q represents a linear or branched alkyl group having 1 to 22 carbon atoms. One or two or more CH ₂ groups in the alkyl group are not directly adjacent to oxygen atoms. Replaced by -O-, -CH=CH-, -CO-, -OCO-, -COO-, -C≡C-, -CF ₂ O-, -OCF ₂ -, the hydrogen atom in ^{R Q can be 4} -Hydroxy-3,5-di-tertiary butylphenyl substituted, M ^Q represents trans 1,4-cyclohexylene, 1,4-phenylene or single bond, but trans 1,4-cyclohexylene One or two non-adjacent -CH ₂ -may be substituted by -O-).

R ^Q represents a linear or branched alkyl group having 1 to 22 carbon atoms. One or more CH ₂ groups in the alkyl group are not directly adjacent to oxygen atoms, and may be -O- , -CH=CH-, -CO-, -OCO-, -COO-, -C≡C-, -CF ₂ O-, -OCF ₂ -substituted, preferably linear alkane with 1 to 10 carbon atoms Group, linear alkoxy group, 1 CH ₂ group is substituted into -OCO- or -COO- linear alkyl group, branched chain alkyl group, branched alkoxy group, 1 CH ₂ group is substituted into -OCO -Or -COO- branched chain alkyl group, more preferably straight chain alkyl group with 1 to 20 carbon atoms, 1 CH ₂ group substituted with -OCO- or -COO- straight chain alkyl group, branched chain alkane The group, branched alkoxy group, and one CH ₂ group are substituted with -OCO- or -COO- branched alkyl. M ^Q represents trans 1,4-cyclohexylene, 1,4-phenylene or a single bond, preferably trans 1,4-cyclohexylene or 1,4-phenylene.

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

In the formula, R ^{Q1 is} preferably a linear or branched alkyl group with 1 to 10 carbon atoms, R ^{Q2 is} preferably a linear or branched alkyl group with 1 to 20 carbon atoms, and R ^Q3 is more Preferably, it is a linear alkyl group having 1 to 8 carbon atoms, a branched chain alkyl group, a linear alkoxy group or a branched alkoxy group, and L ^{Q is} preferably a linear extended alkyl group having 1 to 8 carbon atoms or a branched alkyl group. Alkylene. Among the compounds represented by general formula (Qa) to general formula (Qd), compounds represented by general formula (Qc) and general formula (Qd) are more preferred.

In the composition of the present invention, it is preferable to contain one or two kinds of compounds represented by the general formula (Q), more preferably one to five kinds, and the content is preferably 0.001 to 1%, more preferably It is 0.001 to 0.1%, particularly preferably 0.001 to 0.05%.

In addition, as the antioxidant or light stabilizer that can be used in the present invention, specifically, the compounds shown in (III-1) to (III-38) below are preferred.

(In the formula, n represents an integer from 0 to 20).

The composition of the present invention preferably contains one or more compounds represented by general formula (Q) or compounds selected from general formulas (III-1) to (III-38), more preferably To contain 1 to 5 types, the content is preferably 0.001 to 1%, more preferably 0.001 to 0.1%, particularly preferably 0.001 to 0.05%.

In general, various parameters calculated from the physical property values of the liquid crystal composition are used as a method of expressing the characteristics of the liquid crystal display element. _{Among them, there are γ 1} /K ₃₃ , which controls the response speed, _{K 11} /K ₃₃ , which controls the steepness of the photoelectric effect, _{and | K 33} /△ε |, which controls the driving voltage. The liquid crystal composition of the present invention combines high-speed response, low driving voltage, good low-temperature storage, wide viewing angle, and high transmittance. _{Therefore, the parameter γ 1} /K ₃₃ that governs the response speed is preferably 10.0mPa‧s‧pN ^-1 or less, more preferably 9.8mPa‧s‧pN ^-1 or less, and particularly preferably 9.5mPa‧s‧pN ^-1 the following, in particular better to 9.2mPa‧s‧pN ^-1 or less, and particularly preferably 9.0mPa‧s‧pN ^-1 or less. _{K 11} /K _{33, which} governs the steepness of the photoelectric effect, is preferably 1.20 or less, more preferably 1.15 or less, particularly preferably 1.10 or less, particularly preferably 1.07 or less, particularly preferably 1.05 or less, particularly preferably 1.03 the following. The parameter governing the driving voltage | K ₃₃ /Δε | is preferably 6.0 pN or less, more preferably 5.7 pN or less, particularly preferably 5.5 pN or less, even more preferably 5.3 pN or less, particularly preferably 5.1 pN or less.

The polymerizable compound-containing composition of the present invention can be irradiated with ultraviolet rays to polymerize the polymerizable compound contained therein to impart liquid crystal alignment ability, and is used for liquid crystal displays that use the birefringence of the composition to control the amount of light transmitted. element.

The liquid crystal display element using the composition of the present invention is useful for both high-speed response and suppression of display failures, and is particularly useful for liquid crystal display elements for active matrix driving. It can be used in VA mode, PSVA mode, PSA mode, IPS mode, or ECB mode. Use liquid crystal display elements.

In addition, in the liquid crystal display element manufacturing process of the ODF method, the most suitable liquid crystal injection amount must be dropped according to the size of the liquid crystal display element. The pressure change or impact on the impact is small, and the liquid crystal can be dripped stably for a long time, so the high yield of the liquid crystal display element can also be maintained. In particular, small-sized liquid crystal display elements that are frequently used in smartphones that are popular recently. Since the most suitable liquid crystal injection amount is small, it is difficult to control the deviation from the most suitable value within a certain range. However, by using this case The invented liquid crystal composition can realize a stable discharge amount of liquid crystal material even in a small liquid crystal display element.

[Example]

The following examples are given to describe the present invention in more detail, but the present invention is not limited by these 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 transition temperature (℃)

△n: Refractive index anisotropy at 293K

△ε: Dielectric constant anisotropy at 293K

γ ₁ : Rotational viscosity at 293K (mPa‧s)

K ₁₁ : The elastic constant of expansion at 293K (pN)

K ₃₃ : The elastic constant of bending at 293K (pN)

In the description of the compounds in the examples, the following abbreviations are used.

<Ring structure>

<Side chain structure>

(However, n in the table is a natural number).

<Link structure>

(However, n in the table is a natural number).

<Examples 1~6>

As an example, LC-1 (Example 1), LC-2 (Example 2), LC-3 (Example 3), LC-4 (Example 4), LC-5 (Example 5) and The liquid crystal composition of LC-6 (Example 6) was measured for its physical properties. The results of the constitution of the liquid crystal composition and its physical properties are shown below.

It can be seen that LC-1 (Example 1), LC-2 (Example 2), LC-3 (Example 3), LC-4 (Example 4), LC-5 (Example 5) and LC-6 (Example 5) Example 6) The parameter γ ₁ /K _{33 that governs the response speed is sufficiently small, the parameter K 11} /K ₃₃ that governs the steepness of the photoelectric effect is sufficiently small, and the parameter that governs the drive voltage | K ₃₃ /△ ε | Substantially low liquid crystal composition. In addition, it can be seen that the wavelength dispersion of Δn is also sufficiently small.

Then, by the vacuum injection method, these liquid crystal compositions were respectively injected into the unit cell with ITO attached with a cell gap of 3.0 μm and coated with a polyimide alignment film that induces vertical alignment to obtain vertical alignment ( VA) Liquid crystal display element. It is confirmed that these VA liquid crystal display elements display high-speed response, low driving voltage, good low-temperature storage, wide viewing angle, and high transmittance.

From the above, it can be seen that the liquid crystal composition system of the present invention can completely combine high-speed response, low driving voltage, good low-temperature storage properties, wide viewing angle, and high transmittance.

<Comparative Examples 1~7>

As comparative examples, LC-A (Comparative Example 1), LC-B (Comparative Example 2), LC-C (Comparative Example 3), LC-D (Comparative Example 4), LC-E (Comparative Example 5), The liquid crystal compositions of LC-F (Comparative Example 6) and LC-G (Comparative Example 7) were measured for their physical properties. The structure and physical properties of the liquid crystal composition are shown below.

Compared with the examples, it can be seen that LC-A (Comparative Example 1), LC-B (Comparative Example 2), LC-C (Comparative Example 3), LC-D (Comparative Example 4), LC-E (Comparative Example 5) ), LC-F (Comparative Example 6) and LC-G (Comparative Example 7) are the parameters γ ₁ /K _{33 that govern the response speed, K 11} /K ₃₃ that govern the steepness of the photoelectric effect, and the drive voltage that governs One of the parameters of | K ₃₃ /△ε | or the wavelength dispersion of △n or their complex number is poor.

Then, by the vacuum injection method, these liquid crystal compositions were respectively injected into the unit cell with ITO attached with a cell gap of 3.0 μm and coated with a polyimide alignment film that induces vertical alignment to obtain vertical alignment ( VA) Liquid crystal display element. The results of the evaluation of the electro-optical characteristics of the vertical alignment (VA) liquid crystal display element obtained are shown below. In the following table, ○ means that the liquid crystal display element obtained in the example shows the same or higher performance, and × means that the liquid crystal display element obtained in the example is compared with the liquid crystal display element, and it is confirmed to be significantly inferior.

Compared with the display elements made in the examples, it is confirmed that these VA liquid crystal display elements have poor response speed, driving voltage, low-temperature storage, viewing angle, and transmittance, or a combination of them.

<Example 7~Example 24>

For the prepared liquid crystal compositions LC-1 to LC6, polymerizable compounds shown in XX-2, XX-2-F and XX-2-O1 are added as polymerizable compounds to prepare MLC containing polymerizable compounds. -1~MLC-18 (Examples 7~24).

The structure of the obtained polymerizable compound-containing liquid crystal composition is shown below.

By the vacuum injection method, these polymerizable compound-containing liquid crystal compositions were respectively injected into the unit cell with 3.0 μm cell gap and coated with ITO-attached polyimide alignment film that induces vertical alignment to obtain Vertical alignment (VA) liquid crystal display element. With respect to the obtained VA liquid crystal display element, while applying a rectangular wave of 10V and 100Hz, 10J exposure was performed with a high-pressure mercury lamp with an intensity of ^{100mW/cm -2 (365nm).} Furthermore, the polymer stabilized vertical alignment (PSVA) liquid crystal display device was obtained by 100J exposure under the state of cutting off the voltage. It was confirmed that these PSVA liquid crystal display elements exhibited the same or higher characteristics as the vertical alignment (VA) liquid crystal display elements made in Examples 1 to 6.

From the above, it can be seen that even in PSVA display devices, the liquid crystal composition of the present invention is an excellent liquid crystal composition that can fully take into account high-speed response, low driving voltage, good low-temperature storage, wide viewing angle, and high transmittance. .

Claims (4)

A liquid crystal composition with negative dielectric anisotropy, which contains one or more compounds selected from the compound represented by the general formula (i), and the compound selected from the compound represented by the general formula (ii) 1 or 2 or more compounds, 1 or 2 or more compounds selected from the compound represented by the general formula (N-1d), 1 selected from the compound represented by the general formula (N-1) One or two or more compounds, one or two or more compounds selected from the dielectric neutral compound represented by the general formula (L), relative to the total amount of the composition, the compound represented by the general formula (i) The total content of the compound is 3% or more, relative to the total amount of the composition, the total content of the compound represented by the general formula (ii) is 3% or more, relative to the compound represented by the general formula (i) and the compound represented by the general formula (ii) The total amount of the compound and the compound represented by the general formula (L), the total content of the compound represented by the general formula (i) is 20% or more;

(In the formula, R ⁱ¹ and R ⁱⁱ¹ each independently represent an alkyl group having 1 to 5 carbon atoms, R ⁱ² and R ⁱⁱ² each independently represent a methyl group or a methoxy group, R ^Nd11 , R ^Nd12 , R ^N11 , R ^N12 , R ^L1 and R ^L2 each independently represent an alkyl group having 1 to 8 carbon atoms, and one or two or more non-adjacent -CH ₂ -groups in the alkyl group can each independently be -CH=CH- , -C≡C-, -O-, -CO-, -COO- or -OCO- substituted, n ^Nd11 represents 1, 2 or 3, n ^N11 and n ^N12 represent 0, 1, 2 or 3, but n ^N11 +n ^N12 represents 1, 2 or 3, n ^L1 represents 0, 1, 2 or 3, A ^N11 , A ^N12 , A ^L1 , A ^L2 and A ^L3 each independently represent selected from (a) 1,4-extension Cyclohexyl (1 -CH ₂ -existing in this group or 2 or more unadjacent -CH ₂ -can be substituted into -O-) and (b) 1,4-phenylene (this group exists 1 -CH= or 2 or more non-adjacent -CH= can be substituted into -N=) (c) naphthalene-2,6-diyl, 1,2,3,4-tetrahydronaphthalene-2 ,6-diyl or decahydronaphthalene-2,6-diyl (1 of naphthalene-2,6-diyl or 1,2,3,4-tetrahydronaphthalene-2,6-diyl- CH= or two or more non-adjacent -CH= groups that can be substituted into -N=), the above-mentioned groups (a), group (b) and group (c) can each independently be cyano , Fluorine atom or chlorine atom substitution, Z ^N11 , Z ^N12 , Z ^L1 and Z ^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 A ^N11 When, A ^N12 , A ^L1 , A ^L2 and/or A ^L3 are plural, they can be the same or different. When Z ^N11 , Z ^N12 , Z ^L1 and/or Z ^L2 are plural, they can be the same Or different, but the compound represented by the general formula (N-1) does not include the compound represented by the general formula (N-1d), and the compound represented by the general formula (L) does not include the general formula (i), the general formula ( ii) Compounds represented by general formula (N-1d) and general formula (N-1)). For example, the liquid crystal composition with negative dielectric anisotropy of claim 1, which further contains a polymerizable compound represented by the general formula (XX),

(In the formula, X ²⁰¹ and X ²⁰² each independently represent a hydrogen atom or a methyl group, and Sp ²⁰¹ and Sp ²⁰² each independently represent a single bond, an alkylene group with 1 to 8 carbon atoms, or -O-(CH ₂ ) _s -(In the formula, s represents an integer from 2 to 7, and the oxygen atom is bonded to the aromatic ring), Z ²⁰¹ 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 single Bond, M ²⁰¹ represents 1,4-phenylene, trans 1,4-cyclohexylene or single bond. All 1,4-phenylene groups in the formula can be replaced by fluorine atoms and carbon number 1~ 3 and/or substituted by an alkoxy group having 1 to 2 carbons). A liquid crystal display element using the composition of claim 1 or 2. A VA type liquid crystal display element which uses the liquid crystal composition of claim 1 or 2.