TW201920629A - Alignment assistant, liquid crystal composition and liquid crystal display element - Google Patents

Abstract

Provided is an alignment assistant which is capable of ensuring storage stability if added into a liquid crystal composition, and which causes liquid crystal molecules to vertically align spontaneously even if a PI layer is omitted. Also provided are: a liquid crystal composition which exhibits excellent storage stability and which enables vertical alignment of liquid crystal molecules even if a PI layer is omitted; and a liquid crystal display element which uses this liquid crystal composition. An alignment assistant according to the present invention is arranged between two substrates together with liquid crystal molecules and causes the liquid crystal molecules to align spontaneously. This alignment assistant is characterized by containing a first compound which contains at least one first affinity group that has an affinity for the substrates and a second compound which contains at least one second affinity group that has an affinity for the substrates, while having a lower polarity than the first affinity group.

Description

Alignment aid, liquid crystal composition and liquid crystal display element

The invention relates to an alignment aid, a liquid crystal composition and a liquid crystal display element.

Previously, in a vertical alignment (VA) liquid crystal display, in order to cause vertical alignment of liquid crystal molecules when no voltage was applied, horizontal alignment of liquid crystal molecules was achieved when a voltage was applied, and an electrode was provided to function as an alignment layer. Polyimide (PI) layer. However, since a huge cost is required for forming a PI layer, a method for realizing alignment of liquid crystal molecules even if the PI layer is omitted is being studied in recent years.

For example, Patent Document 1 discloses a liquid crystal medium, which is characterized in that a mixture of polar compounds having negative dielectric anisotropy is used as a basis, and at least one spontaneous alignment additive is contained, and it is described that the liquid crystal medium can be preferably used. Theme in displays without alignment layers. Furthermore, in Patent Document 1, a specific compound having a hydroxyl group is used as a spontaneous alignment additive. [Prior Art Literature] [Patent Literature]

[Patent Document 1] Japanese Patent Publication No. 2014-524951

[Problems to be Solved by the Invention] However, according to research by the present inventors, it has been found that when the self-aligning additive described in Patent Document 1 is used, an alignment restricting force for making liquid crystal molecules vertically aligned is insufficient. In the case of a liquid crystal display element without a PI layer, an alignment unevenness caused by the liquid crystal molecules not showing a predetermined alignment state is generated at the end of the liquid crystal display element, which needs to be improved, and the liquid crystal containing the self-alignment additive is stored. Precipitation of crystals occurred during the composition, and there was room for improvement in terms of storage stability.

Therefore, an object of the present invention is to provide an alignment aid capable of ensuring the storage stability of a liquid crystal composition containing an alignment aid (self-alignment additive) and liquid crystal molecules, and allowing liquid crystal molecules to spontaneously align even if the PI layer is omitted. In addition, another object of the present invention is to provide a polymer sustained alignment (PSA) type and polymer sustained vertical alignment (PSVA) which are excellent in storage stability and can achieve a polymer sustained alignment (PSA) even if the PI layer is omitted. Type, VA type, and other liquid crystal display elements, and liquid crystal display elements using the liquid crystal composition. [Means for solving problems]

The present invention provides an alignment aid, which is arranged between two substrates together with liquid crystal molecules and spontaneously aligns the liquid crystal molecules. The alignment aid is characterized by containing: a first compound containing Said substrate has at least one first affinity group having an affinity; and a second compound comprising at least one second affinity group having an affinity with respect to said substrate and having a lower polarity than said first affinity group .

In addition, the present invention provides a liquid crystal composition containing the alignment aid and liquid crystal molecules of the present invention, and the dielectric constant anisotropy (Δε) is negative.

Furthermore, the present invention provides a liquid crystal display device including two substrates and a liquid crystal layer including the liquid crystal composition of the present invention provided between the two substrates. [Effect of the invention]

According to the present invention, it is possible to provide an alignment aid having excellent storage stability and capable of performing uniform vertical alignment of liquid crystal molecules even if the PI layer is omitted, a liquid crystal composition containing the alignment aid, and a liquid crystal display using the liquid crystal composition. element.

Hereinafter, the alignment aid, the liquid crystal composition, and the liquid crystal display element of the present invention will be described in detail based on preferred embodiments. (Alignment Auxiliary) The alignment aid of the present invention can be spontaneously aligned with the liquid crystal molecules by being disposed between the two substrates together with the liquid crystal molecules. This alignment aid contains: a first compound containing at least one first affinity group having an affinity with respect to the substrate; and a second compound containing an affinity with respect to the substrate and having a polarity greater than that of the first affinity group Low at least one second affinity group.

Each of the first compound and the second compound includes an affinity group having an affinity with respect to the substrate, and other portions (other structures) having an affinity with respect to the substrate that are lower than the affinity group. Therefore, when a liquid crystal composition containing an alignment aid and liquid crystal molecules is supplied between two substrates to form a liquid crystal layer, an affinity group can be adsorbed (adhered) to the substrate and other parts can be arranged away from the substrate (alignment). Both the first compound and the second compound. The presence of the first compound and the second compound arranged as described above allows the liquid crystal molecules to be held in a state of being aligned in the vertical direction in the liquid crystal layer.

Here, since the affinity group is adsorbed (adhered) to the substrate and has the function of fixing the first compound and the second compound to the substrate, it may also be referred to as an adsorption group (adhesive group), a PEG group, or a sink group (sinker group). ) Or anchoring base. According to such an alignment aid of the present invention, even if the PI layer is omitted, the liquid crystal molecules can be aligned (causing vertical alignment of the liquid crystal molecules when no voltage is applied, and achieving horizontal alignment of the liquid crystal molecules when voltage is applied). Therefore, both the first compound and the second compound can be preferably used to assist the spontaneous alignment of liquid crystal molecules in the liquid crystal layer.

The so-called first affinity group and the second affinity group have different polarities from each other. In particular, the polarity of the first affinity group is higher than that of the second affinity group. Therefore, when the liquid crystal composition is supplied onto the substrate, the first affinity group is adsorbed on the substrate earlier than the second affinity group. As a result, the first compound is fixed on the substrate more preferentially than the second compound.

On the other hand, the second compound is uniformly wetted and spread on the substrate and is fixed on the substrate. In this case, the second compound may be aligned (aligned) with the first compound fixed on the substrate as a reference (base point). According to the situation, the alignment aid of the present invention contains a first compound containing at least one first affinity group and a second compound containing a second affinity group, whereby a more precise alignment limiting force of the liquid crystal molecules can be exerted. (The effect of preventing uneven alignment).

In addition, since the first compound has a first affinity group having a higher polarity, if the amount contained in the liquid crystal composition is increased, it tends to be easily precipitated. The alignment aid of the present invention contains a second compound having a second affinity group having a relatively low polarity, thereby preventing or suppressing the precipitation of the first compound in the liquid crystal composition. This can ensure the storage stability of the liquid crystal composition (especially the stability during storage at low temperature). Furthermore, even if the amount of the first compound is reduced, the alignment aid of the present invention and the synergistic effect with the second compound can be used to exert a sufficient alignment limiting force of the liquid crystal molecules.

The ratio of the first compound to the second compound in the alignment aid is not particularly limited, but it is preferably about 1: 0.1 to 1:10 in terms of weight ratio, more preferably about 1: 0.5 to 1: 5. . By containing the first compound and the second compound in such a ratio, the alignment aid can surely exert two effects of an effect of improving the alignment limiting force of the liquid crystal molecules and an effect of ensuring the storage stability of the liquid crystal composition.

The specific amount of the first compound and the second compound to be used can be determined by the relationship with the amount of liquid crystal molecules when the liquid crystal composition is prepared. The amount of the first compound is preferably about 0.1% to 1.5% by weight, and more preferably about 0.3% to 1.3% by weight based on 100% by weight of the liquid crystal molecules. On the other hand, the amount of the second compound is also preferably about 0.1% to 1.5% by weight, more preferably about 0.3% to 1.3% by weight, relative to 100% by weight of the liquid crystal molecules. In addition, the total amount of the first compound and the second compound is preferably prepared as small as possible (with respect to 100% by weight of the liquid crystal molecules, within a range that can sufficiently exert the effect of improving the alignment limiting force of the liquid crystal molecules). It is preferably 1.4% by weight or less, more preferably about 0.5% to 1% by weight). This can further improve the storage stability of the liquid crystal composition.

The first affinity group and the second affinity group preferably each include a group selected from the following group and are designed so that the polarity of the second affinity group is lower than the polarity of the first affinity group. Substituents. [Chemical 1] (In the formula, the black dot indicates the bonding key)

If it is a substituent including a group selected from the group, the first affinity group and the second affinity can be easily designed so that the polarity of the second affinity group becomes lower than that of the first affinity group. Sex-based. The first affinity group preferably contains a group selected from the group represented by the following Chemical Formula 2, and more preferably is selected from the group represented by the following general formula (K1-1) to (K1-3) In the group. [Chemical 2]

[Chemical 3]

In the formulae (K1-1) to (K1-3), the black dot at the left end represents a bonding bond, W ^K2 represents a methine group, C-CH ₃ , CC ₂ H ₅ , a nitrogen atom or a silicon atom, and W ^K3 represents a carbon Atom, X ₁ to X ₅ each independently represent a hydrogen atom, -OH group or CH ₂ = C (CH ₃ ) COO-, at least one of X ₁ and X ₂ represents -OH group, X ₃ , X ₄ and At least one of X ₅ represents an -OH group, and Sp ₁ , Sp _2, and Sp ₃ each represent a single bond or a spacer.

Here, the spacer is preferably -CH = CH-, -CF = CF-, -C≡C-, -COO-, -OCO-, -OCOO-, -OOCO-, -CF ₂ O-,- OCF _2- , -CH = CHCOO-, -OCOCH = CH-, -CH ₂ -CH ₂ COO-, -OCOCH ₂ -CH _2- , -CH = C (CH ₃ ) COO-, -OCOC (CH ₃ ) = CH-, -CH ₂ -CH (CH ₃ ) COO-, -OCOCH (CH ₃ ) -CH _2- , -OCH ₂ CH ₂ O- or branched or straight-chain alkylene with 1 to 20 carbon atoms (Wherein one of the alkylene groups or two or more -CH ₂ -which are not adjacent to each other may be substituted with -O-, -COO-, or -OCO-).

Such a first affinity group has sufficiently high polarity, and therefore exhibits a higher affinity (adsorption force) with respect to the substrate. Sp ₁ , Sp ₂ and Sp _{3 are} particularly preferably a single bond or a methylene group, respectively. As a specific example of a 1st affinity group, the substituent shown by the following group is mentioned, for example.

[Chemical 4] (In the formula, the black dot indicates the bonding key)

In the group, when the chemical stability as an alignment aid is important, the first affinity groups are preferably K1-1, K1-2-1, K1-2-2, and K1-2-3. When the alignment of the liquid crystal molecules is important, the first affinity groups are preferably K1-2-1, K1-2-2, and K1-2-3. When the solubility in the liquid crystal composition is important, the first affinity group is preferably K1-2-4, K1-3-1, K1-3-2, K1-3-3, K1- 3-4 and K1-3-5. Furthermore, when these balances are valued, the first affinity groups are more preferably K1-2-1, K1-2-2, K1-2-3, K1-3-1, K1-3-2, K1-3-3 and K1-3-4.

On the other hand, the second affinity group preferably contains a group selected from the group represented by the following Chemical Formula 5, and more preferably is selected from the following general formula (K2-1) to general formula (K2-14) Represented by the group. [Chemical 5]

[Chemical 6]

In the formulae (K2-1) to (K2-14), the black dot at the left end represents a bonding bond, and any methylene group can independently pass through a linear or branched alkyl group or carbon atom having 1 to 5 carbon atoms. A linear or branched alkoxy group having 1 to 5 or a linear or branched perfluoroalkyl group having 1 to 5 carbon atoms. W ^{K 1} represents a methine group, C-CH ₃ , CC ₂ H ₅ Or nitrogen atom, X ^K1 and Y ^K1 each independently represent -CH _2- , an oxygen atom or a sulfur atom, and Z ^K1 represents an oxygen atom or a sulfur atom.

U ^K1 , V ^K1, and S ^K1 each independently represent a methine group or a nitrogen atom (wherein U ^K1 is a methine group, V ^K1 is a methine group, and S ^K1 is a nitrogen atom), and R ^K1 is a hydrogen atom , A straight or branched alkyl group having 1 to 5 carbon atoms, a straight or branched alkoxy group having 1 to 5 carbon atoms, or a straight or branched perfluoroalkyl group having 1 to 5 carbon atoms.

The second compound containing such a second affinity group is more easily wetted and spread on the substrate. In the group, when the chemical stability as an alignment aid is important, the second affinity group is preferably (K2-1), (K2-3), (K2-8), (K2-9) ) And (K2-13). When the alignment of the liquid crystal molecules is important, the second affinity groups are preferably (K2-1) and (K2-3). When the solubility in the liquid crystal composition is important, the second affinity group is preferably (K2-1), (K2-9), and (K2-13). Furthermore, when these balances are valued, the second affinity groups are more preferably (K2-1) and (K2-3).

Various combinations exist as the combination of the first affinity group and the second affinity group, but a combination of the first affinity group containing a hydroxyl group and the second affinity group containing an ether group or a carbonate group is preferred. By setting the first affinity group and the second affinity group to the combination, the polarity of the first affinity group can be sufficiently increased, and the polarity of the second affinity group can be sufficiently lower than that of the first affinity group. Base polarity. Therefore, the two effects of the effect of increasing the alignment restricting force of the liquid crystal molecules and the effect of ensuring the storage stability of the liquid crystal composition can be further enhanced.

The number of the first affinity group and the second affinity group may be one or more. By setting the number of the first affinity group and the second affinity group, the fixing force of the first compound and the second compound to the substrate can be adjusted.

The first compound and the second compound each preferably contain at least one polymerizable group. By polymerizing the polymerizable groups, the first compound and the second compound can be more firmly fixed to the substrate, and the holding force of the liquid crystal molecules can also be improved. As a result, peeling of the liquid crystal layer from the substrate can be prevented or suppressed.

In addition, the number of polymerizable groups may be one or plural. By having a plurality of polymerizable groups, the crosslinking density of the first compound and the second compound can be increased. Therefore, these can be further firmly fixed to the substrate, and the holding force of the liquid crystal molecules can be further improved.

Such a polymerizable group is selected from the group represented by the following general formula (P-1) to (P-13), for example. [Chemical 7] (In the formula, the black dot on the right side represents the bonding key)

Since these polymerizable groups have high reactivity, they can be sufficiently and reliably polymerized even with low energy (for example, light energy and thermal energy). Therefore, when the first compound and the second compound are polymerized, it is possible to prevent or suppress deterioration of the liquid crystal molecules due to adverse effects. Among these, the polymerizable group is preferably a group represented by Formula (P-1) to Formula (P-3), and more preferably a group represented by Formula (P-1) and Formula (P-3).

The first compound and the second compound preferably each include a mesogen. Thereby, the first affinity group and the second affinity group having higher polarity than the liquid crystal original group can be adsorbed on the substrate, and the liquid crystal original group having low polarity can be more surely arranged (aligned) away from the substrate. When the first compound and the second compound contain a mesogen group, the affinity of the first compound and the second compound with the liquid crystal molecules becomes higher. Therefore, the alignment restraining force of the liquid crystal molecules by the first compound and the second compound can be further improved.

In addition, the first affinity group, the second affinity group, and the polymerizable group may be directly bonded to the mesogen, respectively, or may be bonded via the same spacer as described above. The position of the mesogen group to which the polymerizable group is bonded is not particularly limited, but it is preferably a position close to the first affinity group or the second affinity group. Thereby, the first compound and the second compound can be polymerized and more firmly fixed to the substrate without adversely affecting the alignment of the liquid crystal molecules. Furthermore, the polymerizable group is preferably bonded to the side with respect to the mesogen.

The mesogen is represented by the following general formula (i), for example. [Chemical 8]

In formula (i), the black dots on the left and black dots on the right represent bonding bonds, and A ⁱ¹ represents a divalent 6-membered ring aromatic group, a divalent 6-membered ring heteroaromatic group, and a divalent 6-membered ring fat. Group or bivalent 6-membered ring heteroaliphatic group, the hydrogen atoms in these ring structures may be halogen atoms, straight or branched alkyl groups having 1 to 10 carbon atoms, and straight 1 to 10 carbon atoms. A chain or branched haloalkyl group, a linear or branched alkoxy group having 1 to 10 carbon atoms, or a P ⁱ¹ -Sp ⁱ¹ -substitution. Here, P ⁱ¹ represents a group selected from the general formula (P-1) to (P-13) a group represented by the general formula polymerizable group, Sp ⁱ¹ represents the same meaning as Z ^i1, Z ⁱ¹ represents a single bond, -CH = CH -, - CF = CF -, - C≡C -, -COO-, -OCO-, -OCOO-, -OOCO-, -CF ₂ O-, -OCF _2- , -CH = CHCOO-, -OCOCH = CH-, -CH ₂ -CH ₂ COO-, -OCOCH ₂ -CH _2- , -CH = C (CH ₃ ) COO-, -OCOC (CH ₃ ) = CH-, -CH ₂ -CH (CH ₃ ) COO-, -OCOCH (CH ₃ ) -CH ₂ -, -OCH ₂ CH ₂ O- or an alkylene group having 2 to 20 carbon atoms (wherein one of the alkylene groups or two or more non-adjacent -CH ₂ -can pass through -O-, -COO- or -OCO-), m ⁱ¹ represents 1 5 is the integer at least 2 m ^i1, A ⁱ¹ plurality may be identical or different from each other.

Preferably, Z ⁱ¹ in formula (i) represents a single bond, -CH = CH-, -C≡C-, -COO-, -OCO-, -OCOO-, -OOCO-, -CH = CHCOO-,- OCOCH = CH-, -CH ₂ -CH ₂ COO-, -OCOCH ₂ -CH _2- , -CH = C (CH ₃ ) COO-, -OCOC (CH ₃ ) = CH-, -CH ₂ -CH (CH ₃ ) COO-, -OCOCH (CH ₃ ) -CH _2- , -OCH ₂ CH ₂ O-, or a linear or branched alkylene group having 2 to 20 carbon atoms (one of the alkylene groups Or two or more -CH ₂ -which are not adjacent may be substituted with -O-).

More preferably, Z ⁱ¹ in formula (i) represents a single bond, -COO-, -OCO-, -CH = CHCOO-, -OCOCH = CH-, -CH ₂ -CH ₂ COO-, -OCOCH ₂ -CH ₂ -, -CH = C (CH ₃ ) COO-, -OCOC (CH ₃ ) = CH-, -CH ₂ -CH (CH ₃ ) COO-, -OCOCH (CH ₃ ) -CH _2- , -OCH ₂ CH ₂ O-, or a linear or branched alkylene group having 2 to 15 carbon atoms (wherein one of the alkylene groups or two or more non-adjacent -CH ₂ -may be substituted with -O-) .

Furthermore, it is ^preferable that Z ⁱ¹ in formula (i) represents a single bond, -CH ₂ -CH ₂ COO-, -OCOCH ₂ -CH _2- , -CH = C (CH ₃ ) COO-, -OCOC (CH ₃ ) = CH-, -CH ₂ -CH (CH ₃ ) COO-, -OCOCH (CH ₃ ) -CH _2- , -OCH ₂ CH ₂ O-, or an alkylene group having 2 carbon atoms (ethylene group (-CH ₂ CH _2- )) or a -O- substituted group (-CH ₂ O-, -OCH _2- ) or -CH ₂ -in an ethyl group, or a straight chain having 3 to 13 carbon atoms Shaped alkylene (wherein one or two or more of -CH ₂ -which are not adjacent to each other may be substituted with -O-).

Preferably, A ⁱ¹ in formula (i) represents a divalent 6-membered ring aromatic group or a divalent 6-membered ring aliphatic group. Here, examples of the divalent 6-membered ring aromatic group or the divalent 6-membered ring aliphatic group include divalent unsubstituted 6-membered ring aromatic groups and divalent unsubstituted 6-membered cycloaliphatic groups or hydrogen atoms in these ring structures via halogen atoms, straight or branched alkyl groups having 1 to 10 carbon atoms, straight or branched halogenated alkyl groups having 1 to 10 carbon atoms, carbon atoms, a straight-chain or branched alkoxy group having 1 to 10 or P ⁱ¹ -Sp ⁱ¹ - substituted with group. Here, P ⁱ¹ represents a polymerizable group selected from the group represented by the general formulae (P-1) to (P-13), and Sp ⁱ¹ represents the same meaning as Z ⁱ¹ .

Among these, A ⁱ¹ in formula (i) is preferably a bivalent unsubstituted 6-membered ring aromatic group, a hydrogen atom in the ring structure via a halogen atom (especially a fluorine atom), and a carbon number of 1 to 10 linear or branched alkyl group, a linear or branched carbon atoms having 1 to 10 alkoxy or P ⁱ¹ -Sp ⁱ¹ - substituted with a divalent 6-membered ring aromatic group, a divalent non- Substituted 6-membered cycloaliphatic group, hydrogen atom in ring structure via halogen atom (especially fluorine atom), straight or branched alkyl group with 1 to 10 carbon atoms, straight chain with 1 to 10 carbon atoms Or branched alkoxy or P ⁱ¹ -Sp ⁱ¹ -substituted bivalent 6-membered cycloaliphatic group, more preferably a hydrogen atom in the ring structure may be a halogen atom (especially a fluorine atom), the alkyl group the alkoxy or P ⁱ¹ -Sp ⁱ¹ - substituted by 1,4-phenylene, 2,6-naphthyl or stretch 1,4-cyclohexyl.

In addition, m ^{i1 is} preferably an integer representing 2 to 5, and more preferably an integer representing 2 to 4. In addition, the mesogenic group represented by the general formula (i) may include any of trivalent and tetravalent branch structures, or any of trivalent and tetravalent, in the middle of the repeating unit-(A ⁱ¹ -Z ⁱ¹ )-. An aliphatic or aromatic ring structure. In this case, the first compound and the second compound each have a branched structure as a whole.

Furthermore, the first compound and the second compound preferably each include a terminal group opposite to the first affinity group or the second affinity group, which is bonded to the mesogen group. The first compound and the second compound including a terminal group are easily arranged (alignment) such that the affinity group is adsorbed on the substrate and the other parts than the affinity group are away from the substrate.

Examples of the terminal group include a straight-chain or branched alkyl group having 1 to 40 carbon atoms, and a straight-chain or branched halogenated alkyl group having 1 to 40 carbon atoms. -CH ₂ -can be substituted by -CH = CH-, -C≡C-, -O-, -NH-, -COO- or -OCO-, but -O- is discontinuous) or directly or via a spacer A polymerizable group bonded to a mesogen.

The polymerizable group and the spacer are the same as those described above. When each of the first compound and the second compound contains a polymerizable group as a terminal group, the crosslink density of the first compound and the second compound can be further increased, and the holding power of the liquid crystal molecules in the liquid crystal layer can be further improved.

Specific examples of the first compound include compounds represented by any one of the following formulae (PJ-I-1) to (PJ-I-45).

[Chemical 9]

[Chemical 10]

[Chemical 11]

[Chemical 12]

[Chemical 13]

[Chemical 14]

[Chemical 15]

[Chemical 16]

[Chemical 17]

On the other hand, as a specific example of a 2nd compound, the compound represented by any one of following formula (PJ-II-1)-(PJ-II-18) is mentioned, for example.

[Chemical 18]

[Chemical 19]

[Chemical 20]

[Chemical 21]

(Liquid Crystal Composition) The liquid crystal composition of the present invention contains an alignment aid (the first compound and the second compound) and liquid crystal molecules, and has a negative dielectric anisotropy (Δε). The liquid crystal molecule preferably contains a compound selected from the group represented by the following general formula (N-1) to general formula (N-3).

[Chemical 22]

In General Formula (N-1), General Formula (N-2), and General Formula (N-3), R ^N11 , R ^N12 , R ^N21 , R ^N22 , R ^N31, and R ^N32 each independently represent the number of carbon atoms 1 ~ 8 alkyl groups (wherein one of the alkyl groups or two or more non-adjacent -CH ₂ -are independently independently selected from -CH = CH-, -C≡C-, -O-, -CO-,- COO- or -OCO-).

A ^N11 , A ^N12 , A ^N21 , A ^N22 , A ^N31 and A ^N32 each independently represent a group selected from (a) 1,4-cyclohexyl (wherein one of the groups -CH ₂ -or not Two or more adjacent -CH ₂ -may be substituted with -O-), (b) 1,4-phenylene (wherein one of the groups -CH = or two or more adjacent -CH = may be substituted by -N =), (c) naphthalene-2,6-diyl, 1,2,3,4-tetrahydronaphthalene-2,6-diyl or decahydronaphthalene-2, 6-diyl (wherein one of the naphthalene-2,6-diyl or 1,2,3,4-tetrahydronaphthalene-2,6-diyl is -CH = or two or more adjacent -CH = may be substituted by -N =), and (d) a group in the group consisting of 1,4-cyclohexenyl, the group (a), the group (b), the group (c) The radical (d) may be independently substituted by a cyano group, a fluorine atom or a chlorine atom, respectively.

In addition, Z ^N11 , Z ^N12 , Z ^N21 , Z ^N22 , Z ^N31, and Z ^N32 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-, X ^N21 means A hydrogen atom or a fluorine atom, and T ^N31 represents -CH ₂ -or an oxygen atom.

n ^N11 , n ^N12 , n ^N21 , n ^N22 , n ^N31, and n ^N32 each independently represent an integer of 0 to 3, but n ^N11 + n ^N12 , n ^N21 + n ^N22, and n ^N31 + n ^N32 are each independently 1 , 2 or 3, when there are a plurality of A ^N11 to A ^N32 and Z ^N11 to Z ^N32 respectively, these may be the same as or different from each other.

The compound of any one of the general formula (N-1), the general formula (N-2), and the general formula (N-3) is preferably a compound in which Δε is negative and its absolute value is greater than 3.

In the general formula (N-1), the general formula (N-2), and the general formula (N-3), R ^N11 , R ^N12 , R ^N21 , R ^N22 , R ^N31, and R ^{N32 are} preferably each independently carbon. Alkyl group having 1 to 8 carbon atoms, alkoxy group having 1 to 8 carbon atoms, alkenyl group having 2 to 8 carbon atoms or alkenyl group having 2 to 8 carbon atoms, more preferably 1 to 5 carbon atoms Alkyl group, alkoxy group having 1 to 5 carbon atoms, alkenyl group having 2 to 5 carbon atoms, or alkenyl group having 2 to 5 carbon atoms, more preferably an alkyl group or carbon having 1 to 5 carbon atoms The alkenyl group having 2 to 5 carbon atoms is particularly preferably an alkyl group having 2 to 5 carbon atoms or an alkenyl group having 2 to 3 carbon atoms, and most preferably an alkenyl group (propenyl group) having 3 carbon atoms.

When R ^N11 , R ^N12 , R ^N21 , R ^N22 , R ^N31, and R ^N32 are bonded to each other as a phenyl (aromatic) ring structure, the number of linear carbon atoms is preferably 1 ~ 5 alkyl groups, linear alkoxy groups having 1 to 4 carbon atoms, and alkenyl groups having 4 to 5 carbon atoms, and the ring structures to which these are bonded are cyclohexane, pyran, and dioxane In the case of a saturated ring structure such as an alkane, a linear alkyl group having 1 to 5 carbon atoms, a linear alkoxy group having 1 to 4 carbon atoms, and a linear carbon number 2 are preferred. ~ 5 alkenyl. In order to stabilize the nematic phase, the total of carbon atoms and oxygen atoms when present is preferably 5 or less, and more preferably linear.

The alkenyl group is preferably selected from the group represented by any one of the formulae (R1) to (R5). [Chemical 23] (The black dots in each formula indicate the bond)

In order to increase Δn, A ^N11 , A ^N12 , A ^N21 , A ^N22 , A ^N31, and A ^{N32 are} preferably independently aromatic groups. In order to improve the response speed, A ^N11 , A ^N12 , A ^N21 , A ^N22 , A ^N31 and A ^{N32 are} preferably each independently an aliphatic group. The aromatic or aliphatic group preferably represents trans-1,4-cyclohexyl, 1,4-phenylene, 2-fluoro-1,4-phenylene, 3-fluoro-1, 4-phenylene, 3,5-difluoro-1,4-phenylene, 2,3-difluoro-1,4-phenylene, 1,4-cyclohexenyl, 1,4- Bicyclo [2.2.2] octyl, piperidine-1,4-diyl, naphthalene-2,6-diyl, decalin-2,6-diyl, or 1,2,3,4-tetrahydro The naphthalene-2,6-diyl group more preferably represents a structure of the following Chem. 24, and further preferably represents trans-1,4-cyclohexyl, 1,4-cyclohexenyl, or 1,4-cyclohexyl Phenyl.

[Chemical 24]

Z ^N11 , Z ^N12 , Z ^N21 , Z ^N22 , Z ^N31, and Z ^N32 preferably each independently represent -CH ₂ O-, -CF ₂ O-, -CH ₂ CH _2- , -CF ₂ CF ₂ -or A single bond, further preferably -CH ₂ O-, -CH ₂ CH ₂ -or a single bond, and particularly preferably -CH ₂ O- or a single bond. X ^{N21 is} preferably a fluorine atom. T ^{N 3 1 is} preferably an oxygen atom.

n ^N11 + n ^N12 , n ^N21 + n ^N22, and n ^N31 + n ^N32 are each preferably independently 1 or 2, more preferably a combination of n ^N11 is 1 and n ^N12 is 0, n ^N11 is 2 and n ^N12 A combination of 0, a combination of n ^N11 is 1 and n ^N12 is 1, a combination of n ^N11 is 2 and n ^N12 is 1, a combination of n ^N21 is 1 and n ^N22 is 0, a combination of n ^N21 is 2 and n ^N22 is 0 A combination of n ^N31 is 1 and n ^N32 is 0, a combination of n ^N31 is 2 and n ^N32 is 0.

The lower limit of the preferable content of the compound represented by the formula (N-1) with respect to the total amount of the liquid crystal composition is 1 mass% or more, 10 mass% or more, 20 mass% or more, 30 mass% or more, and 40 mass%. Above, 50% by mass, 55% by mass, 60% by mass, 65% by mass, 70% by mass, 75% by mass, 80% by mass. On the other hand, the upper limit of the preferred content is 95% by mass or less, 85% by mass or less, 75% by mass or less, 65% by mass or less, 55% by mass or less, 45% by mass or less, 35% by mass or less, 25 Mass% or less, 20 mass% or less.

The lower limit of the preferable content of the compound represented by the formula (N-2) with respect to the total amount of the liquid crystal composition is 1 mass% or more, 10 mass% or more, 20 mass% or more, 30 mass% or more, and 40 mass%. Above, 50% by mass, 55% by mass, 60% by mass, 65% by mass, 70% by mass, 75% by mass, 80% by mass. On the other hand, the upper limit of the preferred content is 95% by mass or less, 85% by mass or less, 75% by mass or less, 65% by mass or less, 55% by mass or less, 45% by mass or less, 35% by mass or less, 25 Mass% or less, 20 mass% or less.

The lower limit of the preferable content of the compound represented by formula (N-3) with respect to the total amount of the liquid crystal composition is 1% by mass or more, 10% by mass or more, 20% by mass or more, 30% by mass or more, and 40% by mass Above, 50% by mass, 55% by mass, 60% by mass, 65% by mass, 70% by mass, 75% by mass, 80% by mass. On the other hand, the upper limit of the preferred content is 95% by mass or less, 85% by mass or less, 75% by mass or less, 65% by mass or less, 55% by mass or less, 45% by mass or less, 35% by mass or less, 25 Mass% or less, 20 mass% or less.

In the case where a liquid crystal composition having a low viscosity and a fast response speed is required, the lower limit value and the upper limit value are preferably lower. Furthermore, when it is necessary to maintain a liquid crystal composition in which the nematic phase-isotropic liquid phase transition temperature (Tni) of the liquid crystal composition is high and the temperature stability is high, it is preferable that the lower limit value is low and the upper limit is high. The value is low. In addition, when it is desired to increase the dielectric constant anisotropy in order to keep the driving voltage low, it is preferable to increase the lower limit value and the upper limit value to be high.

As a compound represented by general formula (N-1), the compound group represented by the following general formula (N-1a)-general formula (N-1g) is mentioned.

[Chemical 25]

In the formulae (N-1a) to (N-1g), R ^N11 and R ^N12 represent the same meanings as R ^N11 and R ^N12 in the general formula (N-1), n ^Na11 represents 0 or 1, and n ^Nb11 represents 0 or 1, n ^Nc11 means 0 or 1, n ^Nd11 means 0 or 1, n ^Ne11 means 1 or 2, n ^Nf11 means 1 or 2, n ^Ng11 means 1 or 2, A ^{N e 11} means trans-1,4 -Cyclohexyl or 1,4-phenylene, A ^Ng11 represents trans-1,4-cyclohexyl, 1,4-cyclohexenyl or 1,4-phenylene, but at least one represents 1 , 4-cyclohexenyl, Z ^{N e 11} 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 a following compound. [Chemical 26] (In the formula, R ^{N1 1 1} and R ^{N1 1 2} each independently represent the same meaning as R ^N11 and R ^N12 in the general formula (N-1).)

R ^{N1 1 1 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 ^{N1 12 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, but two or more compounds may be used in combination. There are no particular restrictions on the types of compounds that can be combined, but they can be used in appropriate combinations in accordance with the required properties such as solubility at low temperature, transition temperature, electrical reliability, and birefringence. For example, as one embodiment, the type of the compound used is one, two, three, four, five or more.

In the case of attaching importance to the improvement of Δε, it is preferable to set the content slightly higher. In the case of attaching importance to the solubility at low temperature, if the content is set to be slightly larger, the effect is high. In the case of attaching importance to Tni, If the content is set slightly smaller, the effect is high. Furthermore, in the case where the dripping trace or afterimage characteristics are improved, it is preferable to set the range of the content to be intermediate.

The lower limit of the preferable content of the compound represented by the formula (N-1-1) with respect to the total amount of the liquid crystal composition is 5 mass% or more, 10 mass% or more, 13 mass% or more, 15 mass% or more, 17 More than mass%, more than 20 mass%, more than 23 mass%, more than 25 mass%, more than 27 mass%, more than 30 mass%, more than 33 mass%, and more than 35 mass%. On the other hand, the upper limit of the preferred content is 50% by mass or less, 40% by mass or less, 38% by mass or less, 35% by mass or less, 33% by mass or less, 30% by mass or less, 28% by mass or less, 25 Mass% or less, 23 mass% or less, 20 mass% or less, 18 mass% or less, 15 mass% or less, 13 mass% or less, 10 mass% or less, 8 mass% or less, 7 mass% or less, 6 mass% or less, 5 Mass% or less, 3 mass% or less.

Further, the compound represented by the general formula (N-1-1) is preferably a compound selected from the group of compounds represented by the formulae (N-1-1.1) to (N-1-1.22), and more preferably The compounds represented by the formulae (N-1-1.1) to (N-1-1.4) are more preferably compounds represented by the formulae (N-1-1.1) and (N-1-1.3).

[Chemical 27]

The compounds represented by the formulae (N-1-1.1) to (N-1-1.22) may be used alone or in combination. The lower limit of the preferable content of the compound (alone or in combination) represented by the formula (N-1-1.1) to the formula (N-1-1.22) with respect to the total amount of the liquid crystal composition is 5% by mass or more and 10% by mass % Or more, 13% or more, 15% or more, 17% or more, 20% or more, 23% or more, 25% or more, 27% or more, 30% or more, 33% or more, 35% or more %the above. On the other hand, the upper limit of the preferred content is 50% by mass or less, 40% by mass or less, 38% by mass or less, 35% by mass or less, 33% by mass or less, 30% by mass or less, 28% by mass or less, 25 Mass% or less, 23 mass% or less, 20 mass% or less, 18 mass% or less, 15 mass% or less, 13 mass% or less, 10 mass% or less, 8 mass% or less, 7 mass% or less, 6 mass% or less, 5 Mass% or less, 3 mass% or less.

The compound represented by General formula (N-1-2) is a following compound. [Chemical 28] (In the formula, R ^{N1 2 1} and R ^{N1 2 2} each independently have the same meaning as R ^N11 and R ^N12 in the general formula (N-1).)

R ^{N1 2 1 is} preferably an alkyl group having 1 to 5 carbon atoms or an alkenyl group having 2 to 5 carbon atoms, and more preferably ethyl, propyl, butyl, or pentyl. R ^{N1 22 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 methyl, propyl, methoxy, Ethoxy or propoxy.

The compound represented by the general formula (N-1-2) may be used alone, but two or more compounds may be used in combination. There are no particular restrictions on the types of compounds that can be combined, but they can be used in appropriate combinations in accordance with the required properties such as solubility at low temperature, transition temperature, electrical reliability, and birefringence. For example, as one embodiment, the type of the compound used is one, two, three, four, five or more.

In the case of attaching importance to the improvement of Δε, it is preferable to set the content slightly higher. In the case of attaching importance to solubility at low temperature, if the content is set to be slightly smaller, the effect is high. In the case of attaching importance to Tni, If you set the content slightly more, the effect is high. Furthermore, in the case where the dripping trace or afterimage characteristics are improved, it is preferable to set the range of the content to be intermediate.

The lower limit of the preferable content of the compound represented by the formula (N-1-2) with respect to the total amount of the liquid crystal composition is 5 mass% or more, 7 mass% or more, 10 mass% or more, 13 mass% or more, 15 Mass% or more, 17 mass% or more, 20 mass% or more, 23 mass% or more, 25 mass% or more, 27 mass% or more, 30 mass% or more, 33 mass% or more, 35 mass% or more, 37 mass% or more, 40 Above mass%, above 42 mass%. On the other hand, the upper limit of the preferred content is 50% by mass or less, 48% by mass or less, 45% by mass or less, 43% by mass or less, 40% by mass or less, 38% by mass or less, 35% by mass or less, 33 Mass% or less, 30 mass% or less, 28 mass% or less, 25 mass% or less, 23 mass% or less, 20 mass% or less, 18 mass% or less, 15 mass% or less, 13 mass% or less, 10 mass% or less, 8 Mass% or less, 7 mass% or less, 6 mass% or less, and 5 mass% or less.

Further, the compound represented by the general formula (N-1-2) is preferably a compound selected from the group of compounds represented by the formulae (N-1-2.1) to (N-1-2.22), and 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 -2.20). When the improvement of Δε is emphasized, compounds represented by the formulae (N-1-2.3) to (N-1-2.7) are preferred, and when the improvement of Tni is emphasized, the formula is preferably The compounds represented by (N-1-2.10), formula (N-1-2.11), and (N-1-2.13) are preferably formula (N-1-2.20) in the case where improvement of response speed is important. ).

[Chemical 29]

The compounds represented by the formulae (N-1-2.1) to (N-1-2.22) may be used alone or in combination. The lower limit of the preferable content of the compound (single or combined) represented by formula (N-1-2.1) to formula (N-1-2.22) with respect to the total amount of the liquid crystal composition is 5 mass% or more and 10 mass % Or more, 13% or more, 15% or more, 17% or more, 20% or more, 23% or more, 25% or more, 27% or more, 30% or more, 33% or more, 35% or more %the above. On the other hand, the upper limit of the preferred content is 50% by mass or less, 40% by mass or less, 38% by mass or less, 35% by mass or less, 33% by mass or less, 30% by mass or less, 28% by mass or less, 25 Mass% or less, 23 mass% or less, 20 mass% or less, 18 mass% or less, 15 mass% or less, 13 mass% or less, 10 mass% or less, 8 mass% or less, 7 mass% or less, 6 mass% or less, 5 Mass% or less, 3 mass% or less.

The compound represented by General formula (N-1-3) is a following compound. [Chemical 30] (In the formula, R ^{N1 3 1} and R ^{N1 3 2} each independently represent the same meaning as R ^N11 and R ^N12 in the general formula (N-1).)

R ^{N1 3 1 is} preferably an alkyl group having 1 to 5 carbon atoms or an alkenyl group having 2 to 5 carbon atoms, and more preferably ethyl, propyl or butyl. R ^{N1 32 is} preferably an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 3 to 5 carbon atoms or an alkoxy group having 1 to 4 carbon atoms, and more preferably 1-propenyl, ethoxy, or propyl Oxy or butoxy.

The compound represented by the general formula (N-1-3) may be used alone, but two or more compounds may be used in combination. There are no particular restrictions on the types of compounds that can be combined, but they can be used in appropriate combinations in accordance with the required properties such as solubility at low temperature, transition temperature, electrical reliability, and birefringence. For example, as one embodiment, the type of the compound used is one, two, three, four, five or more.

In the case of attaching importance to the improvement of Δε, it is preferable to set the content slightly higher. In the case of attaching importance to the solubility at low temperature, if the content is set to be slightly larger, the effect is high. In the case of attaching importance to Tni, If you set the content slightly more, the effect is high. Furthermore, in the case where the dripping trace or afterimage characteristics are improved, it is preferable to set the range of the content to be intermediate.

The lower limit of the preferable content of the compound represented by the formula (N-1-3) with respect to the total amount of the liquid crystal composition is 5 mass% or more, 10 mass% or more, 13 mass% or more, 15 mass% or more, 17 More than mass%, more than 20 mass%. On the other hand, the upper limit of the preferable content is 35 mass% or less, 30 mass% or less, 28 mass% or less, 25 mass% or less, 23 mass% or less, 20 mass% or less, 18 mass% or less, 15 Mass% or less, 13 mass% or less.

Furthermore, it is preferable that the compound represented by general formula (N-1-3) is a compound chosen from the compound group represented by Formula (N-1-3.1)-Formula (N-1-3.21), More preferably, The compounds represented by formulae (N-1-3.1) to (N-1-3.7) and (N-1-3.21) are further preferably formulae (N-1-3.1) and (N-1-3.2) ), A compound represented by formula (N-1-3.3), formula (N-1-3.4), and formula (N-1-3.6).

[Chemical 31]

The compounds represented by the formulae (N-1-3.1) to (N-1-3.4), (N-1-3.6), and (N-1-3.21) may be used alone or in combination. , But is preferably a combination of formula (N-1-3.1) and formula (N-1-3.2), selected from formula (N-1-3.3), formula (N-1-3.4), and formula (N-1 -3.6) two or three combinations.

Compounds represented by formulae (N-1-3.1) to (N-1-3.4), (N-1-3.6), and (N-1-3.21) with respect to the total amount of the liquid crystal composition (alone or The lower limit of the preferable content is 5 mass% or more, 10 mass% or more, 13 mass% or more, 15 mass% or more, 17 mass% or more, and 20 mass% or more. On the other hand, the upper limit of the preferable content is 35 mass% or less, 30 mass% or less, 28 mass% or less, 25 mass% or less, 23 mass% or less, 20 mass% or less, 18 mass% or less, 15 Mass% or less, 13 mass% or less.

The compound represented by General formula (N-1-4) is a following compound. [Chemical 32] (In the formula, R ^{N1 4 1} and R ^{N1 4 2} each independently represent the same meaning as R ^N11 and R ^N12 in the general formula (N-1).)

R ^{N1 4 1} and R ^{N1 4 2} are each preferably independently 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 Methyl, propyl, ethoxy or butoxy.

The compound represented by the general formula (N-1-4) may be used alone, but two or more compounds may be used in combination. There are no particular restrictions on the types of compounds that can be combined, but they can be used in appropriate combinations in accordance with the required properties such as solubility at low temperature, transition temperature, electrical reliability, and birefringence. For example, as one embodiment, the type of the compound used is one, two, three, four, five or more.

In the case of attaching importance to the improvement of Δε, it is preferable to set the content slightly higher. In the case of attaching importance to the solubility at low temperature, if the content is set to be slightly larger, the effect is high. In the case of attaching importance to Tni, If the content is set slightly smaller, the effect is high. Furthermore, in the case where the dripping trace or afterimage characteristics are improved, it is preferable to set the range of the content to be intermediate.

The lower limit of the preferable content of the compound represented by the formula (N-1-4) with respect to the total amount of the liquid crystal composition is 3% by mass or more, 5% by mass or more, 7% by mass or more, 10% by mass or more, 13 More than mass%, more than 15 mass%, more than 17 mass%, more than 20 mass%. On the other hand, the upper limit of the preferable content is 35 mass% or less, 30 mass% or less, 28 mass% or less, 25 mass% or less, 23 mass% or less, 20 mass% or less, 18 mass% or less, 15 Mass% or less, 13 mass% or less, 11 mass% or less, 10 mass% or less, and 8 mass% or less.

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), and more preferably The compounds represented by formulae (N-1-4.1) to (N-1-4.4) are further preferably formulae (N-1-4.1), (N-1-4.2), and (N-1-4.4) ).

[Chemical 33]

The compounds represented by the formulae (N-1-4.1) to (N-1-4.14) may be used alone or in combination. The lower limit of the preferable content of the compound (single or combined) represented by formula (N-1-4.1) to formula (N-1-4.14) with respect to the total amount of the liquid crystal composition is 3% by mass or more and 5% by mass % Or more, 7% or more, 10% or more, 13% or more, 15% or more, 17% or more, or 20% or more. On the other hand, the upper limit of the preferable content is 35 mass% or less, 30 mass% or less, 28 mass% or less, 25 mass% or less, 23 mass% or less, 20 mass% or less, 18 mass% or less, 15 Mass% or less, 13 mass% or less, 11 mass% or less, 10 mass% or less, and 8 mass% or less.

The compound represented by General formula (N-1-5) is a following compound. [Chem 34] (In the formula, R ^{N1 5 1} and R ^{N1 5 2} each independently have the same meaning as R ^N11 and R ^N12 in the general formula (N-1).)

R ^{N1 5 1} and R ^{N1 5 2} are each preferably independently 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 Ethyl, propyl or butyl.

The compound represented by the general formula (N-1-5) may be used alone, but two or more compounds may be used in combination. There are no particular restrictions on the types of compounds that can be combined, but they can be used in appropriate combinations in accordance with the required properties such as solubility at low temperature, transition temperature, electrical reliability, and birefringence. For example, as one embodiment, the type of the compound used is one, two, three, four, five or more.

In the case of attaching importance to the improvement of Δε, it is preferable to set the content slightly higher. In the case of attaching importance to solubility at low temperature, if the content is set slightly smaller, the effect is high. If you set the content slightly more, the effect is high. Furthermore, in the case where the dripping trace or afterimage characteristics are improved, it is preferable to set the range of the content to be intermediate.

The lower limit of the preferable content of the compound represented by the formula (N-1-5) with respect to the total amount of the liquid crystal composition is 5 mass% or more, 8 mass% or more, 10 mass% or more, 13 mass% or more, 15 More than mass%, more than 17 mass%, more than 20 mass%. On the other hand, the upper limit of the preferred content is 35% by mass or less, 33% by mass or less, 30% by mass or less, 28% by mass or less, 25% by mass or less, 23% by mass or less, 20% by mass or less, 18 Mass% or less, 15 mass% or less, 13 mass% or less.

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

[Chemical 35]

The compounds represented by the formula (N-1-5.1), the formula (N-1-5.2), and the formula (N-1-5.4) may be used alone or in combination. The lower limit of the preferable content of the compound (single or combined) represented by formula (N-1-5.1), formula (N-1-5.2), and formula (N-1-5.4) with respect to the total amount of the liquid crystal composition The values are 5 mass% or more, 8 mass% or more, 10 mass% or more, 13 mass% or more, 15 mass% or more, 17 mass% or more, and 20 mass% or more. On the other hand, the upper limit of the preferred content is 35% by mass or less, 33% by mass or less, 30% by mass or less, 28% by mass or less, 25% by mass or less, 23% by mass or less, 20% by mass or less, 18 Mass% or less, 15 mass% or less, 13 mass% or less.

The compound represented by the general formula (N-1-10) is the following compound. [Chemical 36] (In the formula, R ^{N1 10 1} and R ^{N1 10 2} each independently represent the same meaning as R ^N11 and R ^N12 in the general formula (N-1).)

R ^{N1 10 1 is} preferably an alkyl group having 1 to 5 carbon atoms or an alkenyl group having 2 to 5 carbon atoms, and more preferably ethyl, propyl, butyl, vinyl, or 1-propenyl. R ^{N1 102 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 ethoxy, propoxy or butoxy base.

The compound represented by the general formula (N-1-10) may be used alone, but two or more compounds may be used in combination. There are no particular restrictions on the types of compounds that can be combined, but they can be used in appropriate combinations in accordance with the required properties such as solubility at low temperature, transition temperature, electrical reliability, and birefringence. For example, as one embodiment of the present invention, the types of compounds used are one, two, three, four, five or more.

In the case of attaching importance to the improvement of Δε, it is preferable to set the content slightly higher. In the case of attaching importance to solubility at low temperature, if the content is set slightly higher, the effect is high. In the case of attaching importance to Tni, If you set the content slightly higher, the effect is higher. Furthermore, in the case where the dripping trace or afterimage characteristics are improved, it is preferable to set the range of the content to be intermediate.

The lower limit of the preferable content of the compound represented by the formula (N-1-10) with respect to the total amount of the liquid crystal composition is 5 mass% or more, 10 mass% or more, 13 mass% or more, 15 mass% or more, 17 More than mass%, more than 20 mass%. On the other hand, the upper limit of the preferable content is 35 mass% or less, 30 mass% or less, 28 mass% or less, 25 mass% or less, 23 mass% or less, 20 mass% or less, 18 mass% or less, 15 Mass% or less, 13 mass% or less.

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-1-10.14), and more preferably The compounds represented by the formulae (N-1-10.1) to (N-1-10.5) are further preferably the compounds represented by the formulae (N-1-10.1) and (N-1-10.2).

[Chemical 37]

The compounds represented by formula (N-1-10.1) and formula (N-1-10.2) may be used alone or in combination. The lower limit of the preferable content of the compound (alone or in combination) represented by the formula (N-1-10.1) and the formula (N-1-10.2) with respect to the total amount of the liquid crystal composition is 5% by mass or more and 10% by mass % Or more, 13% by mass or more, 15% by mass or more, 17% by mass or more, and 20% by mass or more. On the other hand, the upper limit of the preferable content is 35 mass% or less, 30 mass% or less, 28 mass% or less, 25 mass% or less, 23 mass% or less, 20 mass% or less, 18 mass% or less, 15 Mass% or less, 13 mass% or less.

The compound represented by General formula (N-1-11) is a following compound. [Chemical 38] ( ^Wherein R ^{N1 11 1} and R ^{N1 11 2} each independently have the same meaning as R ^N11 and R ^N12 in the general formula (N-1))

R ^{N1 11 1 is} preferably an alkyl group having 1 to 5 carbon atoms or an alkenyl group having 2 to 5 carbon atoms, and more preferably ethyl, propyl, butyl, vinyl, or 1-propenyl. R ^{N1 112 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 ethoxy, propoxy or butoxy base.

The compound represented by the general formula (N-1-11) may be used alone, but two or more compounds may be used in combination. There are no particular restrictions on the types of compounds that can be combined, but they can be used in appropriate combinations in accordance with the required properties such as solubility at low temperature, transition temperature, electrical reliability, and birefringence. For example, as one embodiment, the type of the compound used is one, two, three, four, five or more.

When the improvement of Δε is valued, the content is preferably set slightly higher. When the solubility at low temperature is valued, the content is set lower, the effect is high. When the value of Tni is valued, if If you set the content slightly higher, the effect is higher. Furthermore, in the case where the dripping trace or afterimage characteristics are improved, it is preferable to set the range of the content to be intermediate.

The lower limit of the preferable content of the compound represented by formula (N-1-11) with respect to the total amount of the liquid crystal composition is 5 mass% or more, 10 mass% or more, 13 mass% or more, 15 mass% or more, 17 More than mass%, more than 20 mass%. On the other hand, the upper limit of the preferable content is 35 mass% or less, 30 mass% or less, 28 mass% or less, 25 mass% or less, 23 mass% or less, 20 mass% or less, 18 mass% or less, 15 Mass% or less, 13 mass% or less.

Furthermore, it is preferable that the compound represented by general formula (N-1-11) is a compound chosen from the compound group represented by Formula (N-1-11.1)-Formula (N-1-11.14), More preferably, Compounds represented by formula (N-1-11.2) and formula (N-1-11.4).

[Chemical 39]

The compounds represented by formula (N-1-11.2) and formula (N-1-11.4) may be used alone or in combination. The lower limit of the preferable content of the compound (alone or in combination) represented by the formula (N-1-11.2) and the formula (N-1-11.4) with respect to the total amount of the liquid crystal composition is 5% by mass or more and 10% by mass % Or more, 13% by mass or more, 15% by mass or more, 17% by mass or more, and 20% by mass or more. On the other hand, the upper limit of the preferable content is 35 mass% or less, 30 mass% or less, 28 mass% or less, 25 mass% or less, 23 mass% or less, 20 mass% or less, 18 mass% or less, 15 Mass% or less, 13 mass% or less.

The compound represented by General formula (N-1-12) is a following compound. [Chemical 40] (In the formula, R ^{N1 12 1} and R ^{N1 12 2} each independently have the same meaning as R ^N11 and R ^N12 in the general formula (N-1).)

R ^{N1 12 1 is} preferably an alkyl group having 1 to 5 carbon atoms or an alkenyl group having 2 to 5 carbon atoms, and more preferably ethyl, propyl or butyl. R ^{N1 122 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 ethoxy, propoxy or butoxy base.

The compound represented by the general formula (N-1-12) may be used alone, but two or more compounds may be used in combination. There are no particular restrictions on the types of compounds that can be combined, but they can be used in appropriate combinations in accordance with the required properties such as solubility at low temperature, transition temperature, electrical reliability, and birefringence. For example, as one embodiment, the type of the compound used is one, two, three, four, five or more.

In the case of attaching importance to the improvement of Δε, it is preferable to set the content slightly higher. In the case of attaching importance to the solubility at low temperature, if the content is set to be slightly larger, the effect is high. In the case of attaching importance to Tni, If you set the content slightly more, the effect is high. Furthermore, in the case where the dripping trace or afterimage characteristics are improved, it is preferable to set the range of the content to be intermediate.

The lower limit of the preferable content of the compound represented by the formula (N-1-12) with respect to the total amount of the liquid crystal composition is 5 mass% or more, 10 mass% or more, 13 mass% or more, 15 mass% or more, 17 More than mass%, more than 20 mass%. On the other hand, the upper limit of the preferable content is 35 mass% or less, 30 mass% or less, 28 mass% or less, 25 mass% or less, 23 mass% or less, 20 mass% or less, 18 mass% or less, 15 Mass% or less, 13 mass% or less.

The compound represented by the general formula (N-1-13) is the following compound. [Chemical 41] (In the formula, R ^{N1 13 1} and R ^{N1 13 2} each independently have the same meaning as R ^N11 and R ^N12 in the general formula (N-1).)

R ^{N1 13 1 is} preferably an alkyl group having 1 to 5 carbon atoms or an alkenyl group having 2 to 5 carbon atoms, and more preferably ethyl, propyl or butyl. R ^{N1 132 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 ethoxy, propoxy, or butoxy base.

The compound represented by the general formula (N-1-13) may be used alone, but two or more compounds may be used in combination. There are no particular restrictions on the types of compounds that can be combined, but they can be used in appropriate combinations in accordance with the required properties such as solubility at low temperature, transition temperature, electrical reliability, and birefringence. For example, as one embodiment, the type of the compound used is one, two, three, four, five or more.

In the case of attaching importance to the improvement of Δε, it is preferable to set the content slightly higher. In the case of attaching importance to the solubility at low temperature, if the content is set to be slightly larger, the effect is high. In the case of attaching importance to Tni, If you set the content slightly more, the effect is high. Furthermore, in the case where the dripping trace or afterimage characteristics are improved, it is preferable to set the range of the content to be intermediate.

The lower limit of the preferable content of the compound represented by the formula (N-1-13) with respect to the total amount of the liquid crystal composition is 5 mass% or more, 10 mass% or more, 13 mass% or more, 15 mass% or more, 17 More than mass%, more than 20 mass%. On the other hand, the upper limit of the preferable content is 35 mass% or less, 30 mass% or less, 28 mass% or less, 25 mass% or less, 23 mass% or less, 20 mass% or less, 18 mass% or less, 15 Mass% or less, 13 mass% or less.

The compound represented by the general formula (N-1-14) is the following compound. [Chemical 42] (In the formula, R ^{N1 14 1} and R ^{N1 14 2} each independently represent the same meaning as R ^N11 and R ^N12 in the general formula (N-1).)

R ^{N1 14 1 is} preferably an alkyl group having 1 to 5 carbon atoms or an alkenyl group having 2 to 5 carbon atoms, and more preferably ethyl, propyl or butyl. R ^{N1 142 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 ethoxy, propoxy, or butoxy base.

The compound represented by the general formula (N-1-14) may be used alone, but two or more compounds may be used in combination. There are no particular restrictions on the types of compounds that can be combined, but they can be used in appropriate combinations in accordance with the required properties such as solubility at low temperature, transition temperature, electrical reliability, and birefringence. For example, as one embodiment of the present invention, the types of compounds used are one, two, three, four, five or more.

In the case of attaching importance to the improvement of Δε, it is preferable to set the content slightly higher. In the case of attaching importance to the solubility at low temperature, if the content is set to be slightly larger, the effect is high. In the case of attaching importance to Tni, If you set the content slightly more, the effect is high. Furthermore, in the case where the dripping trace or afterimage characteristics are improved, it is preferable to set the range of the content to be intermediate.

The lower limit of the preferable content of the compound represented by the formula (N-1-14) with respect to the total amount of the liquid crystal composition is 5 mass% or more, 10 mass% or more, 13 mass% or more, 15 mass% or more, 17 More than mass%, more than 20 mass%. On the other hand, the upper limit of the preferable content is 35 mass% or less, 30 mass% or less, 28 mass% or less, 25 mass% or less, 23 mass% or less, 20 mass% or less, 18 mass% or less, 15 Mass% or less, 13 mass% or less.

The compound represented by General formula (N-1-15) is a following compound. [Chemical 43] (In the formula, R ^{N1 15 1} and R ^{N1 15 2} each independently represent the same meaning as R ^N11 and R ^N12 in the general formula (N-1).)

R ^{N1 15 1 is} preferably an alkyl group having 1 to 5 carbon atoms or an alkenyl group having 2 to 5 carbon atoms, and more preferably ethyl, propyl or butyl. R ^{N1 152 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 ethoxy, propoxy or butoxy base.

The compound represented by the general formula (N-1-15) may be used alone, but two or more compounds may be used in combination. There are no particular restrictions on the types of compounds that can be combined, but they can be used in appropriate combinations in accordance with the required properties such as solubility at low temperature, transition temperature, electrical reliability, and birefringence. For example, as one embodiment, the type of the compound used is one, two, three, four, five or more.

In the case of attaching importance to the improvement of Δε, it is preferable to set the content slightly higher. In the case of attaching importance to the solubility at low temperature, if the content is set to be slightly larger, the effect is high. In the case of attaching importance to Tni, If you set the content slightly more, the effect is high. Furthermore, in the case where the dripping trace or afterimage characteristics are improved, it is preferable to set the range of the content to be intermediate.

The lower limit of the preferable content of the compound represented by the formula (N-1-15) with respect to the total amount of the liquid crystal composition is 5 mass% or more, 10 mass% or more, 13 mass% or more, 15 mass% or more, 17 More than mass%, more than 20 mass%. On the other hand, the upper limit of the preferable content is 35 mass% or less, 30 mass% or less, 28 mass% or less, 25 mass% or less, 23 mass% or less, 20 mass% or less, 18 mass% or less, 15 Mass% or less, 13 mass% or less.

The compound represented by the general formula (N-1-16) is the following compound. [Chemical 44] (In the formula, R ^{N1 16 1} and R ^{N1 16 2} each independently represent the same meaning as R ^N11 and R ^N12 in the general formula (N-1).)

R ^{N1 16 1 is} preferably an alkyl group having 1 to 5 carbon atoms or an alkenyl group having 2 to 5 carbon atoms, and more preferably ethyl, propyl or butyl. R ^{N1 1 6 2 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 an ethoxy group, a propoxy group or Butoxy.

The compound represented by the general formula (N-1-16) may be used alone, but two or more compounds may be used in combination. There are no particular restrictions on the types of compounds that can be combined, but they can be used in appropriate combinations in accordance with the required properties such as solubility at low temperature, transition temperature, electrical reliability, and birefringence. For example, as one embodiment, the type of the compound used is one, two, three, four, five or more.

In the case of attaching importance to the improvement of Δε, it is preferable to set the content slightly higher. In the case of attaching importance to the solubility at low temperature, if the content is set to be slightly larger, the effect is high. In the case of attaching importance to Tni, If you set the content slightly more, the effect is high. Furthermore, in the case where the dripping trace or afterimage characteristics are improved, it is preferable to set the range of the content to be intermediate.

The lower limit of the preferable content of the compound represented by the formula (N-1-16) with respect to the total amount of the liquid crystal composition is 5 mass% or more, 10 mass% or more, 13 mass% or more, 15 mass% or more, 17 More than mass%, more than 20 mass%. On the other hand, the upper limit of the preferable content is 35 mass% or less, 30 mass% or less, 28 mass% or less, 25 mass% or less, 23 mass% or less, 20 mass% or less, 18 mass% or less, 15 Mass% or less, 13 mass% or less.

The compound represented by the general formula (N-1-17) is the following compound. [Chemical 45] (In the formula, R ^{N1 17 1} and R ^{N1 17 2} each independently represent the same meaning as R ^N11 and R ^N12 in the general formula (N-1).)

R ^{N1 17 1 is} preferably an alkyl group having 1 to 5 carbon atoms or an alkenyl group having 2 to 5 carbon atoms, and more preferably ethyl, propyl or butyl. R ^{N1 172 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 ethoxy, propoxy, or butoxy base.

The compound represented by the general formula (N-1-17) may be used alone, but two or more compounds may be used in combination. There are no particular restrictions on the types of compounds that can be combined, but they can be used in appropriate combinations in accordance with the required properties such as solubility at low temperature, transition temperature, electrical reliability, and birefringence. For example, as one embodiment, the type of the compound used is one, two, three, four, five or more.

In the case of attaching importance to the improvement of Δε, it is preferable to set the content slightly higher. In the case of attaching importance to the solubility at low temperature, if the content is set to be slightly larger, the effect is high. In the case of attaching importance to Tni, If you set the content slightly more, the effect is high. Furthermore, in the case where the dripping trace or afterimage characteristics are improved, it is preferable to set the range of the content to be intermediate.

The lower limit of the preferable content of the compound represented by the formula (N-1-17) with respect to the total amount of the liquid crystal composition is 5 mass% or more, 10 mass% or more, 13 mass% or more, 15 mass% or more, 17 More than mass%, more than 20 mass%. On the other hand, the upper limit of the preferable content is 35 mass% or less, 30 mass% or less, 28 mass% or less, 25 mass% or less, 23 mass% or less, 20 mass% or less, 18 mass% or less, 15 Mass% or less, 13 mass% or less.

The compound represented by General formula (N-1-18) is a following compound. [Chemical 46] (In the formula, R ^{N1 18 1} and R ^{N1 18 2} each independently have the same meaning as R ^N11 and R ^N12 in the general formula (N-1).)

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 methyl, ethyl, propyl or butyl. R ^{N1 182 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 ethoxy, propoxy, or butoxy base.

The compound represented by the general formula (N-1-18) may be used alone, but two or more compounds may be used in combination. There are no particular restrictions on the types of compounds that can be combined, but they can be used in appropriate combinations in accordance with the required properties such as solubility at low temperature, transition temperature, electrical reliability, and birefringence. For example, as one embodiment, the type of the compound used is one, two, three, four, five or more.

In the case of attaching importance to the improvement of Δε, it is preferable to set the content slightly higher. In the case of attaching importance to the solubility at low temperature, if the content is set to be slightly larger, the effect is high. If you set the content slightly more, the effect is high. Furthermore, in the case where the dripping trace or afterimage characteristics are improved, it is preferable to set the range of the content to be intermediate.

The lower limit of the preferable content of the compound represented by the formula (N-1-18) with respect to the total amount of the liquid crystal composition is 5 mass% or more, 10 mass% or more, 13 mass% or more, 15 mass% or more, 17 More than mass%, more than 20 mass%. On the other hand, the upper limit of the preferable content is 35 mass% or less, 30 mass% or less, 28 mass% or less, 25 mass% or less, 23 mass% or less, 20 mass% or less, 18 mass% or less, 15 Mass% or less, 13 mass% or less.

Furthermore, it is preferable that the compound represented by general formula (N-1-18) is a compound chosen from the compound group represented by Formula (N-1-18.1)-Formula (N-1-18.5), More preferably, The compounds represented by the formulae (N-1-18.1) to (N-1-18.3) are more preferably compounds represented by the formulae (N-1-18.2) and (N-1-18.3).

[Chemical 47]

The compound represented by the general formula (N-1-20) is the following compound. [Chemical 48] (In the formula, R ^{N1 20 1} and R ^{N1 20 2} each independently represent the same meaning as R ^N11 and R ^N12 in the general formula (N-1).)

R ^{N1 20 1} and R ^{N1 20 2} are each preferably independently an alkyl group having 1 to 5 carbon atoms or an alkenyl group having 2 to 5 carbon atoms, and more preferably ethyl, propyl or butyl.

The compound represented by the general formula (N-1-20) may be used alone, but two or more compounds may be used in combination. There are no particular restrictions on the types of compounds that can be combined, but they can be used in appropriate combinations in accordance with the required properties such as solubility at low temperature, transition temperature, electrical reliability, and birefringence. For example, as one embodiment, the type of the compound used is one, two, three, four, five or more.

In the case of attaching importance to the improvement of Δε, it is preferable to set the content slightly higher. In the case of attaching importance to the solubility at low temperature, if the content is set to be slightly larger, the effect is high. In the case of attaching importance to Tni, If you set the content slightly more, the effect is high. Furthermore, in the case where the dripping trace or afterimage characteristics are improved, it is preferable to set the range of the content to be intermediate.

The lower limit of the preferable content of the compound represented by the formula (N-1-20) with respect to the total amount of the liquid crystal composition is 5 mass% or more, 10 mass% or more, 13 mass% or more, 15 mass% or more, 17 More than mass%, more than 20 mass%. On the other hand, the upper limit of the preferable content is 35 mass% or less, 30 mass% or less, 28 mass% or less, 25 mass% or less, 23 mass% or less, 20 mass% or less, 18 mass% or less, 15 Mass% or less, 13 mass% or less.

The compound represented by general formula (N-1-21) is the following compound. [Chemical 49] (In the formula, R ^{N1 21 1} and R ^{N1 21 2} each independently represent the same meaning as R ^N11 and R ^N12 in the general formula (N-1).)

R ^{N1 21 1} and R ^{N1 21 2} are each 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, but two or more compounds may be used in combination. There are no particular restrictions on the types of compounds that can be combined, but they can be used in appropriate combinations in accordance with the required properties such as solubility at low temperature, transition temperature, electrical reliability, and birefringence. For example, as one embodiment, the type of the compound used is one, two, three, four, five or more.

In the case of attaching importance to the improvement of Δε, it is preferable to set the content slightly higher. In the case of attaching importance to the solubility at low temperature, if the content is set to be slightly larger, the effect is high. In the case of attaching importance to Tni, If you set the content slightly more, the effect is high. Furthermore, in the case where the dripping trace or afterimage characteristics are improved, it is preferable to set the range of the content to be intermediate.

The lower limit of the preferable content of the compound represented by the formula (N-1-21) with respect to the total amount of the liquid crystal composition is 5 mass% or more, 10 mass% or more, 13 mass% or more, 15 mass% or more, 17 More than mass%, more than 20 mass%. On the other hand, the upper limit of the preferable content is 35 mass% or less, 30 mass% or less, 28 mass% or less, 25 mass% or less, 23 mass% or less, 20 mass% or less, 18 mass% or less, 15 Mass% or less, 13 mass% or less.

The compound represented by the general formula (N-1-22) is the following compound. [Chemical 50] (In the formula, R ^{N1 22 1} and R ^{N1 22 2} each independently have the same meaning as R ^N11 and R ^N12 in the general formula (N-1).)

R ^{N1 22 1} and R ^{N1 22 2} are each 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, but two or more compounds may be used in combination. There are no particular restrictions on the types of compounds that can be combined, but they can be used in appropriate combinations in accordance with the required properties such as solubility at low temperature, transition temperature, electrical reliability, and birefringence. For example, as one embodiment, the type of the compound used is one, two, three, four, five or more.

In the case of attaching importance to the improvement of Δε, it is preferable to set the content slightly higher. In the case of attaching importance to the solubility at low temperature, if the content is set to be slightly larger, the effect is high. If you set the content slightly more, the effect is high. Furthermore, in the case where the dripping trace or afterimage characteristics are improved, it is preferable to set the range of the content to be intermediate.

The lower limit of the preferable content of the compound represented by the formula (N-1-21) with respect to the total amount of the liquid crystal composition is 1% by mass or more, 5% by mass or more, 10% by mass or more, 13% by mass or more, 15 More than mass%, more than 17 mass%, more than 20 mass%. On the other hand, the upper limit of the preferable content is 35 mass% or less, 30 mass% or less, 28 mass% or less, 25 mass% or less, 23 mass% or less, 20 mass% or less, 18 mass% or less, 15 Mass% or less, 13 mass% or less, 10 mass% or less, and 5 mass% or less.

Furthermore, it is preferable that the compound represented by general formula (N-1-22) is a compound chosen from the compound group represented by Formula (N-1-22.1)-Formula (N-1-22.12), More preferably, The compounds represented by the formulae (N-1-22.1) to (N-1-22.5) are further preferably the compounds represented by the formulae (N-1-22.1) to (N-1-22.4).

[Chemical 51]

The compound represented by general formula (N-3) is preferably a compound selected from the group of compounds represented by general formula (N-3-2). [Chemical 52] (In the formula, R ^{N 32 1} and R ^{N 32 2} each independently represent the same meaning as R ^N11 and R ^N12 in the general formula (N-3).)

R ^{N 32 1} and R ^{N 32 2} are each 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 or an pentyl group.

The compound represented by the general formula (N-3-2) may be used alone, but two or more compounds may be used in combination. There are no particular restrictions on the types of compounds that can be combined, but they can be used in appropriate combinations in accordance with the required properties such as solubility at low temperature, transition temperature, electrical reliability, and birefringence. For example, as one embodiment, the type of the compound used is one, two, three, four, five or more.

In the case of attaching importance to the improvement of Δε, it is preferable to set the content slightly higher. In the case of attaching importance to the solubility at low temperature, if the content is set to be slightly larger, the effect is high. In the case of attaching importance to Tni, If the content is set slightly smaller, the effect is high. Furthermore, in the case where the dripping trace or afterimage characteristics are improved, it is preferable to set the range of the content to be intermediate.

The lower limit of the preferable content of the compound represented by the formula (N-3-2) with respect to the total amount of the liquid crystal composition is 3% by mass or more, 5% by mass or more, 10% by mass or more, 13% by mass or more, 15 More than mass%, more than 17 mass%, more than 20 mass%, more than 23 mass%, more than 25 mass%, more than 27 mass%, more than 30 mass%, more than 33 mass%, and more than 35 mass%. On the other hand, the upper limit of the preferred content is 50% by mass or less, 40% by mass or less, 38% by mass or less, 35% by mass or less, 33% by mass or less, 30% by mass or less, 28% by mass or less, 25 Mass% or less, 23 mass% or less, 20 mass% or less, 18 mass% or less, 15 mass% or less, 13 mass% or less, 10 mass% or less, 8 mass% or less, 7 mass% or less, 6 mass% or less, 5 Mass% or less.

Furthermore, it is preferable that the compound represented by General formula (N-3-2) is a compound chosen from the compound group represented by Formula (N-3-2.1)-Formula (N-3-2.3). [Chem 53]

The liquid crystal molecule may include a compound represented by the following general formula (L). [Chemical 54]

In the formula (L), R ^L1 and R ^L2 each independently represent an alkyl group having 1 to 8 carbon atoms (wherein one of the alkyl groups or two or more non-adjacent -CH ₂ -are each independently selected from -CH = CH-, -C≡C-, -O-, -CO-, -COO-, or -OCO-)), n ^L1 represents 0, 1, 2 or 3.

A ^L1 , A ^L2 and A ^L3 each independently represent a group selected from (a) 1,4-cyclohexyl (wherein one of the groups -CH ₂ -or two or more -CH _{2 which are} not adjacent to each other) -May be substituted with -O-), (b) 1,4-phenylene (wherein one -CH = present in the group or two or more non-adjacent -CH = may be substituted with- N =), and (c) naphthalene-2,6-diyl, 1,2,3,4-tetrahydronaphthalene-2,6-diyl or decahydronaphthalene-2,6-diyl (wherein, One of the naphthalene-2,6-diyl or 1,2,3,4-tetrahydronaphthalene-2,6-diyl -CH = or two or more non-adjacent -CH = may be substituted as- The groups in the group consisting of N =), and the groups (a), (b), and (c) may be independently substituted with a cyano group, a fluorine atom, or a chlorine atom, respectively.

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 n ^{L 1} is 2 or 3 and there are multiple A ^{L 2} In the following, these may be the same as or different from each other. When n ^{L 1} is 2 or 3 and there are multiple Z ^{L 2} , these may be the same or different from each other. General formula (N-1), general formula ( N-2) and compounds represented by general formula (N-3) are excluded.

The compound represented by the general formula (L) corresponds to a compound having a substantially neutral dielectric property (the value of Δε is -2 to 2). The compounds represented by the general formula (L) may be used alone, but may be used in combination. There are no particular restrictions on the types of compounds that can be combined, but they can be used in appropriate combinations in accordance with desired properties such as solubility at low temperature, transition temperature, electrical reliability, and birefringence. For example, as one embodiment, one kind of compound is used. Or in another embodiment, there are two, three, four, five, six, seven, eight, nine, ten or more.

The amount of the compound represented by the general formula (L) contained in the liquid crystal composition needs to correspond to solubility at low temperature, transfer temperature, electrical reliability, birefringence, process suitability, traces of dripping, afterimage, and medium. The required performance such as the anisotropy of the electric constant is appropriately adjusted.

The lower limit of the preferable content of the compound represented by formula (L) with respect to the total amount of the liquid crystal composition is 1% by mass or more, 10% by mass or more, 20% by mass or more, 30% by mass or more, 40% by mass or more, 50% by mass, 55% by mass, 60% by mass, 65% by mass, 70% by mass, 75% by mass, 80% by mass. On the other hand, the upper limit of the preferred content is 95% by mass or less, 85% by mass or less, 75% by mass or less, 65% by mass or less, 55% by mass or less, 45% by mass or less, 35% by mass or less, 25 Mass% or less.

In the case where a liquid crystal composition that needs to keep the viscosity of the liquid crystal composition low and has a fast response speed, it is preferable that the lower limit value is high and the upper limit value is high. Furthermore, when a liquid crystal composition in which the Tni of the liquid crystal composition is required to be kept high and the temperature stability is good, it is preferable that the 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 keep the driving voltage low, it is preferable to lower the lower limit value and lower the upper limit value.

In the case of reliability, R ^L1 and R ^{L2 are} preferably both alkyl groups. In the case of reducing the volatility of compounds, R ^L1 and R ^{L2 are} preferably alkoxy groups. In the case of a decrease, at least one is preferably an alkenyl group. The number of halogen atoms present in the molecule is preferably zero, one, two, or three, more preferably zero or one, and in the case where compatibility with other liquid crystal molecules is important, one is preferred. .

When the ring structure to which R ^L1 and R ^{L2 are} bonded is phenyl (aromatic), a linear alkyl group having 1 to 5 carbon atoms and a linear carbon number 1 to 1 are preferred. The alkoxy group of 4 and the alkenyl group of 4 to 5 carbon atoms are preferably linear when the ring structure to which they are bonded is a saturated ring structure such as cyclohexane, pyran, and dioxane. Alkyl group having 1 to 5 carbon atoms, linear alkoxy group having 1 to 4 carbon atoms, and 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, and more preferably linear.

The alkenyl group is preferably selected from the group represented by any one of the formulae (R1) to (R5). [Chem 55] (The black dots in each formula indicate the bond)

When the response speed is important, n ^{L 1 is} preferably 0. In order to improve the upper limit temperature of the nematic phase, n ^{L 1 is} preferably 2 or 3. In order to achieve these balances, n ^{L 1 is} preferably 1. In addition, in order to satisfy the characteristics required as a liquid crystal composition, it is preferable to combine compounds having different values.

In the case where it is required to increase Δn, A ^L1 , A ^L2 and A ^{L3 are} preferably aromatic. In order to improve the response speed, A ^L1 , A ^L2 and A ^{L3 are} preferably aliphatic, and are preferably expressed independently. Trans-1,4-cyclohexyl, 1,4-phenylene, 2-fluoro-1,4-phenylene, 3-fluoro-1,4-phenylene, 3,5-difluoro- 1,4-phenylene, 1,4-cyclohexenyl, 1,4-bicyclo [2.2.2] octyl, piperidine-1,4-diyl, naphthalene-2,6-diyl , Decalin-2,6-diyl, or 1,2,3,4-tetrahydronaphthalene-2,6-diyl, more preferably a structure represented by the following formula 56, and even more preferably trans-1 , 4-cyclohexyl or 1,4-phenylene.

[Chemical 56]

When the response speed is important, Z ^{L 1} and Z ^{L 2 are} preferably single bonds. The compound represented by the general formula (L) preferably has zero or one halogen atom in the molecule. The compound represented by general formula (L) is preferably a compound selected from the group of compounds represented by general formula (L-1) to general formula (L-7).

The compound represented by general formula (L-1) is the following compound. [Chemical 57] (In the formula, R ^{L1 1} and R ^{L1 2} each independently represent the same meaning as R ^{L 1} and R ^{L 2} in the general formula (L).)

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

The compound represented by the general formula (L-1) may be used alone, but two or more compounds may be used in combination. There are no particular restrictions on the types of compounds that can be combined, but they can be used in appropriate combinations in accordance with the required properties such as solubility at low temperature, transition temperature, electrical reliability, and birefringence. For example, as one embodiment, the type of the compound used is one, two, three, four, five or more.

The lower limit of the preferable content of the compound represented by the formula (L-1) with respect to the total amount of the liquid crystal composition is 1 mass% or more, 2 mass% or more, 3 mass% or more, 5 mass% or more, and 7 mass%. Above, 10% by mass, 15% by mass, 20% by mass, 25% by mass, 30% by mass, 35% by mass, 40% by mass, 45% by mass, 50% by mass, 55% by mass the above. On the other hand, the upper limit of the preferred content is 95% by mass or less, 90% by mass or less, 85% by mass or less, 80% by mass or less, 75% by mass or less, 70% by mass or less, 65% by mass or less, 60 Mass% or less, 55 mass% or less, 50 mass% or less, 45 mass% or less, 40 mass% or less, 35 mass% or less, 30 mass% or less, 25 mass% or less.

In the case where a liquid crystal composition that needs to keep the viscosity of the liquid crystal composition low and has a fast response speed, it is preferable that the lower limit value is high and the upper limit value is high. Furthermore, when a liquid crystal composition in which the Tni of the liquid crystal composition is required to be kept high and the temperature stability is good, it is preferable that the lower limit value is moderate and the upper limit value is moderate. In addition, when it is desired to increase the dielectric constant anisotropy in order to keep the driving voltage low, the lower limit value and the upper limit value are preferably low.

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). [Chem 58] (Wherein R ^{L 1 2} represents the same meaning 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), and more preferably formula ( The compound represented by L-1-1.2) or formula (L-1-1.3) is particularly preferably a compound represented by formula (L-1-1.3).

[Chemical 59]

The lower limit of the preferable content of the compound represented by the formula (L-1-1.3) with respect to the total amount of the liquid crystal composition is 1% by mass or more, 2% by mass or more, 3% by mass or more, 5% by mass or more, 7 More than 10% by mass. On the other hand, the upper limit of the preferred content is 20% by mass or less, 15% by mass or less, 13% by mass or less, 10% by mass or less, 8% by mass or less, 7% by mass or less, 6% by mass or less, 5 Mass% or less, 3 mass% or less.

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). [Chemical 60] (Wherein R ^{L 1 2} represents the same meaning as in the general formula (L-1))

The lower limit of the preferable content of the compound represented by the formula (L-1-2) with respect to the total amount of the liquid crystal composition is 1% by mass or more, 5% by mass or more, 10% by mass or more, 15% by mass or more, 17 More than mass%, more than 20 mass%, more than 23 mass%, more than 25 mass%, more than 27 mass%, more than 30 mass%, and more than 35 mass%. On the other hand, the upper limit of the preferred content is 60% by mass or less, 55% by mass or less, 50% by mass or less, 45% by mass or less, 42% by mass or less, 40% by mass or less, 38% by mass or less, 35 Mass% or less, 33 mass% or less, 30 mass% or less.

Furthermore, it is preferable that the compound represented by general formula (L-1-2) is a compound chosen from the compound group represented by Formula (L-1-2.1)-Formula (L-1-2.4), More preferably, Compounds represented by formula (L-1-2.2) to formula (L-1-2.4). In particular, the compound represented by the formula (L-1-2.2) is particularly preferable because it improves the response speed of the liquid crystal composition. When Tni having a higher response speed is required, it is preferable to use a compound represented by the formula (L-1-2.3) or (L-1-2.4). In addition, in order to improve the solubility at a low temperature, the amount of the compound represented by the formula (L-1-2.3) and the formula (L-1-2.4) contained in the liquid crystal composition is insufficient to be 30% by mass or more. Good.

[Chem 61]

The lower limit of the preferable content of the compound represented by the formula (L-1-2.2) with respect to the total amount of the liquid crystal composition is 10% by mass or more, 15% by mass or more, 18% by mass or more, 20% by mass or more, 23 More than mass%, more than 25 mass%, more than 27 mass%, more than 30 mass%, more than 33 mass%, more than 35 mass%, more than 38 mass%, and more than 40 mass%. On the other hand, the upper limit of the preferred content is 60% by mass or less, 55% by mass or less, 50% by mass or less, 45% by mass or less, 43% by mass or less, 40% by mass or less, 38% by mass or less, 35 Mass% or less, 32 mass% or less, 30 mass% or less, 27 mass% or less, 25 mass% or less, and 22 mass% or less.

The lower limit of the preferable total content of the compound represented by formula (L-1-2.3) and the compound represented by formula (L-1-2.4) with respect to the total amount of the liquid crystal composition is 10% by mass or more, 15 More than mass%, more than 20% by mass, more than 25% by mass, more than 27% by mass, more than 30% by mass, more than 35% by mass, and more than 40% by mass. On the other hand, the upper limit of the preferred content is 60% by mass or less, 55% by mass or less, 50% by mass or less, 45% by mass or less, 43% by mass or less, 40% by mass or less, 38% by mass or less, 35 Mass% or less, 32 mass% or less, 30 mass% or less, 27 mass% or less, 25 mass% or less, and 22 mass% or less.

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). [Chem 62] (Wherein R ^{L 1 3} and R ^{L 1 4} each independently represent an alkyl group having 1 to 8 carbon atoms, an alkoxy group having 1 to 8 carbon atoms or an alkenyl group having 2 to 8 carbon atoms)

R ^{L 1 3} and R ^{L 1 4} are each preferably a linear alkyl group having 1 to 5 carbon atoms, a linear alkyl group having 1 to 4 carbon atoms, or a linear carbon. Alkenyl having 2 to 5 atoms.

The lower limit of the preferable content of the compound represented by the formula (L-1-3) with respect to the total amount of the liquid crystal composition is 1% by mass or more, 5% by mass or more, 10% by mass or more, 13% by mass or more, 15 More than mass%, more than 17 mass%, more than 20 mass%, more than 23 mass%, more than 25 mass%, and more than 30 mass%. On the other hand, the upper limit of the preferred content is 60% by mass or less, 55% by mass or less, 50% by mass or less, 45% by mass or less, 40% by mass or less, 37% by mass or less, 35% by mass or less, 33 Mass% or less, 30 mass% or less, 27 mass% or less, 25 mass% or less, 23 mass% or less, 20 mass% or less, 17 mass% or less, 15 mass% or less, 13 mass% or less, and 10 mass% or less.

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-1-3.13), and more preferably The compound represented by a formula (L-1-3.1), a formula (L-1-3.3), or a formula (L-1-3.4). In particular, the compound represented by the formula (L-1-3.1) is particularly preferable because it improves the response speed of the liquid crystal composition. In addition, when Tni having a higher response speed is required, it is preferable to use the formula (L-1-3.3), the formula (L-1-3.4), the formula (L-1-3.11), and the formula (L-1- 3.12). Furthermore, in order to improve the solubility at low temperature, the formula (L-1-3.3), the formula (L-1-3.4), the formula (L-1-3.11), and the formula (L- 1-3.12) It is not preferable that the total amount of the compound represented is 20% by mass or more.

[Chem 63]

The lower limit of the preferable content of the compound represented by the formula (L-1-3.1) with respect to the total amount of the liquid crystal composition is 1% by mass or more, 2% by mass or more, 3% by mass or more, 5% by mass or more, 7 More than mass%, more than 10% by mass, more than 13% by mass, more than 15% by mass, more than 18% by mass, and more than 20% by mass. On the other hand, the upper limit of the preferred content is 20% by mass or less, 17% by mass or less, 15% by mass or less, 13% by mass or less, 10% by mass or less, 8% by mass or less, 7% by mass or less, 6 Mass% or less.

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 general formula (L-1-5). [Chemical 64] (Wherein R ^{L 1 5} and R ^{L 1 6} each independently represent an alkyl group having 1 to 8 carbon atoms, an alkoxy group having 1 to 8 carbon atoms or an alkenyl group having 2 to 8 carbon atoms)

R ^{L 1 5} and R ^{L 1 6} are each preferably a linear alkyl group having 1 to 5 carbon atoms, a linear alkyl group having 1 to 4 carbon atoms, or a linear carbon. Alkenyl having 2 to 5 atoms.

The lower limit of the preferable content of the compound represented by the formula (L-1-4) with respect to the total amount of the liquid crystal composition is 1% by mass or more, 5% by mass or more, 10% by mass or more, 13% by mass or more, 15 More than mass%, more than 17 mass%, more than 20 mass%. On the other hand, the upper limit of the preferable content is 25% by mass or less, 23% by mass or less, 20% by mass or less, 17% by mass or less, 15% by mass or less, 13% by mass or less, and 10% by mass or less.

The lower limit of the preferable content of the compound represented by the formula (L-1-5) with respect to the total amount of the liquid crystal composition is 1% by mass or more, 5% by mass or more, 10% by mass or more, 13% by mass or more, 15 More than mass%, more than 17 mass%, more than 20 mass%. On the other hand, the upper limit of the preferable content is 25% by mass or less, 23% by mass or less, 20% by mass or less, 17% by mass or less, 15% by mass or less, 13% by mass or less, and 10% by mass or less.

Furthermore, it is preferable that the compound represented by general formula (L-1-4) and general formula (L-1-5) is selected from Formula (L-1-4.1)-Formula (L-1-4.3), and Formula ( The compound in the compound group represented by L-1-5.1) to formula (L-1-5.3) is more preferably a compound represented by formula (L-1-4.2) or formula (L-1-5.2).

[Chem 65]

The lower limit of the preferable content of the compound represented by the formula (L-1-4.2) with respect to the total amount of the liquid crystal composition is 1% by mass or more, 2% by mass or more, 3% by mass or more, 5% by mass or more, 7 More than mass%, more than 10% by mass, more than 13% by mass, more than 15% by mass, more than 18% by mass, and more than 20% by mass. On the other hand, the upper limit of the preferred content is 20% by mass or less, 17% by mass or less, 15% by mass or less, 13% by mass or less, 10% by mass or less, 8% by mass or less, 7% by mass or less, 6 Mass% or less.

Preferably, it is selected from the group consisting of formula (L-1-1.3), formula (L-1-2.2), formula (L-1-3.1), formula (L-1-3.3), and formula (L-1-3.4) And a combination of two or more compounds among the compounds represented by formula (L-1-3.11) and formula (L-1-3.12), more preferably selected from the group consisting of formula (L-1-1.3) and formula (L- 1-2.2), two or more of compounds represented by formula (L-1-3.1), formula (L-1-3.3), formula (L-1-3.4) and formula (L-1-4.2) Compound combination.

The lower limit of the preferable total content of these compounds with respect to the total amount of the liquid crystal composition is 1 mass% or more, 2 mass% or more, 3 mass% or more, 5 mass% or more, 7 mass% or more, and 10 mass% or more. 13% by mass or more, 15% by mass or more, 18% by mass or more, 20% by mass or more, 23% by mass or more, 25% by mass or more, 27% by mass or more, 30% by mass or more, 33% by mass or more, 35% by mass or more . On the other hand, the upper limit of the preferred total content is 80% by mass or less, 70% by mass or less, 60% by mass or less, 50% by mass or less, 45% by mass or less, 40% by mass or less, 37% by mass or less, 35 mass% or less, 33 mass% or less, 30 mass% or less, 28 mass% or less, 25 mass% or less, 23 mass% or less, and 20 mass% or less.

In the case where the reliability of the liquid crystal composition is important, it is preferable to select a compound selected from the group consisting of compounds represented by formula (L-1-3.1), (L-1-3.3), and (L-1-3.4) In a combination of two or more compounds, when the response speed of the liquid crystal composition is important, two compounds selected from the group consisting of compounds represented by formula (L-1-1.3) and formula (L-1-2.2) are preferred. The above compounds are combined.

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). [Chemical 66] (Wherein R ^{L 1 7} and R ^{L 1 8} each independently represent a methyl group or a hydrogen atom)

The lower limit of the preferable content of the compound represented by the formula (L-1-6) with respect to the total amount of the liquid crystal composition is 1% by mass or more, 5% by mass or more, 10% by mass or more, 15% by mass or more, 17 More than mass%, more than 20 mass%, more than 23 mass%, more than 25 mass%, more than 27 mass%, more than 30 mass%, and more than 35 mass%. On the other hand, the upper limit of the preferred content is 60% by mass or less, 55% by mass or less, 50% by mass or less, 45% by mass or less, 42% by mass or less, 40% by mass or less, 38% by mass or less, 35 Mass% or less, 33 mass% or less, 30 mass% or less.

Furthermore, it is preferable that the compound represented by general formula (L-1-6) is a compound chosen from the compound group represented by Formula (L-1-6.1)-Formula (L-1-6.3). [Chemical 67]

The compound represented by general formula (L-2) is the following compound. [Chemical 68] (In the formula, R ^{L2 1} and R ^{L2 2} each independently represent the same meaning as R ^{L 1} and R ^{L 2} in the general formula (L).)

R ^{L2 1 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 and 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-2) may be used alone, but two or more compounds may be used in combination. There are no particular restrictions on the types of compounds that can be combined, but they can be used in appropriate combinations in accordance with the required properties such as solubility at low temperature, transition temperature, electrical reliability, and birefringence. For example, as one embodiment, the type of the compound used is one, two, three, four, five or more.

When the solubility at a low temperature is valued, the effect is high if the content is set to be slightly larger, and when the content is set to be slightly lower, the effect is high. Furthermore, in the case where the dripping trace or afterimage characteristics are improved, it is preferable to set the range of the content to be intermediate.

The lower limit of the preferable content of the compound represented by the formula (L-2) with respect to the total amount of the liquid crystal composition is 1 mass% or more, 2 mass% or more, 3 mass% or more, 5 mass% or more, and 7 mass%. Above 10% by mass. On the other hand, the upper limit of the preferred content is 20% by mass or less, 15% by mass or less, 13% by mass or less, 10% by mass or less, 8% by mass or less, 7% by mass or less, 6% by mass or less, 5 Mass% or less, 3 mass% or less.

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), and more preferably formula (L-2.1) , Compounds represented by formula (L-2.3), formula (L-2.4) and formula (L-2.6).

[Chemical 69]

The compound represented by general formula (L-3) is the following compound. [Chem 70] (In the formula, R ^L31 and R ^L32 each independently represent the same meaning as R ^L1 and R ^L2 in the general formula (L).)

R ^{L 31} and R ^{L 32 are} preferably each independently 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, but two or more compounds may be used in combination. There are no particular restrictions on the types of compounds that can be combined, but they can be used in appropriate combinations in accordance with the required properties such as solubility at low temperature, transition temperature, electrical reliability, and birefringence. For example, as one embodiment, the type of the compound used is one, two, three, four, five or more.

The lower limit of the preferable content of the compound represented by the formula (L-3) with respect to the total amount of the liquid crystal composition is 1 mass% or more, 2 mass% or more, 3 mass% or more, 5 mass% or more, and 7 mass%. Above 10% by mass. On the other hand, the upper limit of the preferred content is 20% by mass or less, 15% by mass or less, 13% by mass or less, 10% by mass or less, 8% by mass or less, 7% by mass or less, 6% by mass or less, 5 Mass% or less, 3 mass% or less.

In the case where a high birefringence is obtained, the effect is high if the content is set to be slightly more, and in the case where high Tni is valued, the effect is high if the content is set to be less. Furthermore, in the case where the dripping trace or afterimage characteristics are improved, it is preferable to set the range of the content to be intermediate.

Furthermore, the compound represented by general formula (L-3) is preferably a compound selected from the group of compounds represented by formula (L-3.1) to formula (L-3.7), and more preferably formula (L-3.2) To a compound represented by formula (L-3.7).

[Chemical 71]

The compound represented by General formula (L-4) is a following compound. [Chemical 72] (In the formula, R ^{L4 1} and R ^{L4 2} each independently represent the same meaning as R ^{L 1} and R ^{L 2} in the general formula (L).)

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 or an alkenyl group having 4 to 5 carbon atoms or Alkoxy having 1 to 4 carbon atoms.

The compound represented by the general formula (L-4) may be used alone, but two or more compounds may be used in combination. There are no particular restrictions on the types of compounds that can be combined, but they can be used in appropriate combinations in accordance with the required properties such as solubility at low temperature, transition temperature, electrical reliability, and birefringence. For example, as one embodiment, the type of the compound used is one, two, three, four, five or more.

In the liquid crystal composition, the content of the compound represented by the general formula (L-4) needs to correspond to solubility at low temperature, transfer temperature, electrical reliability, birefringence, process suitability, traces of dripping, afterimage, and medium. The required performance such as the anisotropy of the electric constant is appropriately adjusted.

The lower limit of the preferable content of the compound represented by the formula (L-4) with respect to the total amount of the liquid crystal composition is 1 mass% or more, 2 mass% or more, 3 mass% or more, 5 mass% or more, and 7 mass%. Above, 10% by mass, 14% by mass, 16% by mass, 20% by mass, 23% by mass, 26% by mass, 30% by mass, 35% by mass, 40% by mass. On the other hand, the upper limit of the preferred content is 50% by mass or less, 40% by mass or less, 35% by mass or less, 30% by mass or less, 20% by mass or less, 15% by mass or less, 10% by mass or less, 5 Mass% or less.

The compound represented by general formula (L-4) is, for example, preferably a compound represented by formula (L-4.1) to formula (L-4.3). [Chemical 73]

Corresponding to the properties required for solubility at low temperature, transition temperature, electrical reliability, birefringence, etc., it may contain a compound represented by the formula (L-4.1), or it may contain a compound represented by the formula (L-4.2) The compound may include both the compound represented by the formula (L-4.1) and the compound represented by the formula (L-4.2), or may include all the compounds represented by the formula (L-4.1) to (L-4.3) .

The lower limit of the preferable content of the compound represented by the formula (L-4.1) or the formula (L-4.2) with respect to the total amount of the liquid crystal composition is 3% by mass or more, 5% by mass or more, 7% by mass or more, 9 Mass% or more, 11 mass% or more, 12 mass% or more, 13 mass% or more, 18 mass% or more, and 21 mass% or more. On the other hand, the upper limit of the preferred content is 45% by mass or less, 40% by mass or less, 35% by mass or less, 30% by mass or less, 25% by mass or less, 23% by mass or less, 20% by mass or less, 18 Mass% or less, 15 mass% or less, 13 mass% or less, 10 mass% or less, and 8 mass% or less.

When both of the compound represented by the formula (L-4.1) and the compound represented by the formula (L-4.2) are contained, the lower limit of the preferable content of the two compounds with respect to the total amount of the liquid crystal composition is 15 masses. % Or more, 19% by mass or more, 24% by mass or more, and 30% by mass or more. On the other hand, the upper limit of the preferred content is 45% by mass or less, 40% by mass or less, 35% by mass or less, 30% by mass or less, 25% by mass or less, 23% by mass or less, 20% by mass or less, 18 Mass% or less, 15 mass% or less, 13 mass% or less.

The compound represented by general formula (L-4) is, for example, a compound represented by formula (L-4.4) to formula (L-4.6), and more preferably a compound represented by formula (L-4.4). [Chemical 74]

Corresponding to the properties required for solubility at low temperature, transition temperature, electrical reliability, birefringence, etc., it may contain a compound represented by formula (L-4.4), and may also contain a compound represented by formula (L-4.5) The compound may contain both the compound represented by formula (L-4.4) and the compound represented by formula (L-4.5).

The lower limit of the preferable content of the compound represented by the formula (L-4.4) or the formula (L-4.5) with respect to the total amount of the liquid crystal composition is 3% by mass or more, 5% by mass or more, 7% by mass or more, 9 Mass% or more, 11 mass% or more, 12 mass% or more, 13 mass% or more, 18 mass% or more, and 21 mass% or more. On the other hand, the upper limit of the preferred content is 45% by mass or less, 40% by mass or less, 35% by mass or less, 30% by mass or less, 25% by mass or less, 23% by mass or less, 20% by mass or less, 18 Mass% or less, 15 mass% or less, 13 mass% or less, 10 mass% or less, and 8 mass% or less.

When both of the compound represented by the formula (L-4.4) and the compound represented by the formula (L-4.5) are contained, the lower limit of the preferable content of the two compounds with respect to the total amount of the liquid crystal composition is 15 masses. % Or more, 19% by mass or more, 24% by mass or more, and 30% by mass or more. On the other hand, the upper limit of the preferred content is 45% by mass or less, 40% by mass or less, 35% by mass or less, 30% by mass or less, 25% by mass or less, 23% by mass or less, 20% by mass or less, 18 Mass% or less, 15 mass% or less, 13 mass% or less.

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). [Chemical 75]

The compound represented by general formula (L-5) is the following compound. [Chemical 76] (In the formula, R ^{L5 1} and R ^{L5 2} each independently have the same meaning as R ^{L 1} and R ^{L 2} in the general formula (L).)

R ^{L5 1 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 and 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, but two or more compounds may be used in combination. There are no particular restrictions on the types of compounds that can be combined, but they can be used in appropriate combinations in accordance with the required properties such as solubility at low temperature, transition temperature, electrical reliability, and birefringence. For example, as one embodiment, the type of the compound used is one, two, three, four, five or more.

In the liquid crystal composition, the content of the compound represented by the general formula (L-5) needs to correspond to solubility at low temperature, transfer temperature, electrical reliability, birefringence, process adaptability, traces of dripping, afterimage, and medium. The required performance such as the anisotropy of the electric constant is appropriately adjusted.

The lower limit of the preferable content of the compound represented by the formula (L-5) with respect to the total amount of the liquid crystal composition is 1 mass% or more, 2 mass% or more, 3 mass% or more, 5 mass% or more, and 7 mass%. Above, 10% by mass, 14% by mass, 16% by mass, 20% by mass, 23% by mass, 26% by mass, 30% by mass, 35% by mass, 40% by mass. On the other hand, the upper limit of the preferred content is 50% by mass or less, 40% by mass or less, 35% by mass or less, 30% by mass or less, 20% by mass or less, 15% by mass or less, 10% by mass or less, 5 Mass% or less.

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). [Chemical 77]

The lower limit of the preferable content of these compounds with respect to the total amount of the liquid crystal composition is 1 mass% or more, 2 mass% or more, 3 mass% or more, 5 mass% or more, and 7 mass% or more. On the other hand, the upper limit of the preferable content is 20% by mass or less, 15% by mass or less, 13% by mass or less, 10% by mass or less, and 9% by mass or less.

The compound represented by general formula (L-5) is preferably a compound represented by formula (L-5.3) or formula (L-5.4). [Chem. 78]

The lower limit of the preferable content of these compounds with respect to the total amount of the liquid crystal composition is 1 mass% or more, 2 mass% or more, 3 mass% or more, 5 mass% or more, and 7 mass% or more. On the other hand, the upper limit of the preferable content is 20% by mass or less, 15% by mass or less, 13% by mass or less, 10% by mass or less, and 9% by mass or less.

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 represented by formula (L-5.7) compound of. [Chem. 79]

The lower limit of the preferable content of these compounds with respect to the total amount of the liquid crystal composition is 1 mass% or more, 2 mass% or more, 3 mass% or more, 5 mass% or more, and 7 mass% or more. On the other hand, the upper limit of the preferable content is 20% by mass or less, 15% by mass or less, 13% by mass or less, 10% by mass or less, and 9% by mass or less.

The compound represented by General formula (L-6) is a following compound. [Chemical 80] (In the formula, R ^{L6 1} and R ^{L6 2} each independently have the same meaning as R ^{L 1} and R ^{L 2} in the general formula (L), and X ^{L6 1} and X ^{L6 2} each independently represent a hydrogen atom or a fluorine atom. )

R ^{L6 1} and R ^{L6 2 are} preferably independently an alkyl group having 1 to 5 carbon atoms or an alkenyl group having 2 to 5 carbon atoms, and one of X ^{L6 1} and X ^{L6 2} is preferably fluorine. Atom, the other is a hydrogen atom.

The compound represented by the general formula (L-6) may be used alone, but two or more compounds may be used in combination. There are no particular restrictions on the types of compounds that can be combined, but they can be used in appropriate combinations in accordance with the required properties such as solubility at low temperature, transition temperature, electrical reliability, and birefringence. For example, as one embodiment, the type of the compound used is one, two, three, four, five or more.

The lower limit of the preferable content of the compound represented by the formula (L-6) with respect to the total amount of the liquid crystal composition is 1 mass% or more, 2 mass% or more, 3 mass% or more, 5 mass% or more, and 7 mass%. Above, 10% by mass, 14% by mass, 16% by mass, 20% by mass, 23% by mass, 26% by mass, 30% by mass, 35% by mass, 40% by mass. On the other hand, the upper limit of the preferred content is 50% by mass or less, 40% by mass or less, 35% by mass or less, 30% by mass or less, 20% by mass or less, 15% by mass or less, 10% by mass or less, 5 Mass% or less. When the emphasis is placed on increasing Δn, the content is preferably increased, and when the focus is on precipitation at a low temperature, the content is preferably small.

The compound represented by general formula (L-6) is preferably a compound represented by formula (L-6.1) to formula (L-6.9). [Chemical 81]

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

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

[Chem 82]

The lower limit of the preferable content of these compounds with respect to the total amount of the liquid crystal composition is 1 mass% or more, 2 mass% or more, 3 mass% or more, 5 mass% or more, and 7 mass% or more. On the other hand, the upper limit of the preferable content is 20% by mass or less, 15% by mass or less, 13% by mass or less, 10% by mass or less, and 9% by mass or less.

The compound represented by General formula (L-7) is a following compound. [Chemical 83] (In the formula, R ^{L7 1} and R ^{L7 2} each independently represent the same meaning as R ^{L 1} and R ^{L 2} in the general formula (L), and A ^{L7 1} and A ^{L7 2} each independently represent the same as the general formula (L A ^{L 2} and A ^{L 3 in) have the} same meaning, but the hydrogen atoms on A ^{L7 1} and A ^{L7 2} can be independently substituted by fluorine atoms, and Z ^{L7 1} represents the same as Z ^{L 2} in general formula (L). Meaning, X ^{L7 1} and X ^{L7 2} each independently represent a fluorine atom or a hydrogen atom)

In the formula, R ^{L7 1} and R ^{L7 2 are} preferably independently an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms or an alkoxy group having 1 to 4 carbon atoms, and A ^{L7 1} and A ^{L7 2 are} preferably independently 1,4-cyclohexyl or 1,4-phenylene, and the hydrogen atoms on A ^{L7 1} and A ^{L7 2} may be independently substituted by fluorine atoms, and Z ^{L7 1} It is preferably a single bond or COO-, more preferably a single bond, and X ^{L7 1} and X ^{L7 2 are} preferably a hydrogen atom.

The types of compounds that can be combined are not particularly limited, but are combined in accordance with the properties required for solubility at low temperature, transition temperature, electrical reliability, birefringence, and the like. For example, as one embodiment, the types of compounds used are one, two, three, and four.

The amount of the compound represented by the general formula (L-7) contained in the liquid crystal composition needs to correspond to solubility at low temperature, transfer temperature, electrical reliability, birefringence, process suitability, drop marks, and afterimages. , Dielectric anisotropy and other required properties to adjust appropriately.

The lower limit of the preferable content of the compound represented by the formula (L-7) with respect to the total amount of the liquid crystal composition is 1 mass% or more, 2 mass% or more, 3 mass% or more, 5 mass% or more, and 7 mass%. Above 10% by mass, above 14% by mass, above 16% by mass, above 20% by mass. On the other hand, the upper limit of the preferred content is 30% by mass or less, 25% by mass or less, 23% by mass or less, 20% by mass or less, 18% by mass or less, 15% by mass or less, 10% by mass or less, 5 Mass% or less.

When the liquid crystal composition is expected to have a high Tni, it is preferable to set the content of the compound represented by the formula (L-7) to be slightly more. When a liquid crystal composition having a low viscosity is desired, the content is preferably increased. Set to slightly less.

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). [Chemical 84]

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). [Chemical 85]

Furthermore, the compound represented by general formula (L-7) is preferably a compound represented by formula (L-7.21) to formula (L-7.23), and more preferably a compound represented by formula (L-7.21). [Chem. 86]

Furthermore, the compound represented by general formula (L-7) is preferably a compound represented by formula (L-7.31) to formula (L-7.34), and more preferably formula (L-7.31) or / and formula (L- 7.32). [Chemical 87]

Furthermore, the compound represented by general formula (L-7) is preferably a compound represented by formula (L-7.41) to formula (L-7.44), and more preferably formula (L-7.41) or / and formula (L- 7.42). [Chem 88]

Furthermore, the compound represented by general formula (L-7) is preferably a compound represented by formula (L-7.51) to formula (L-7.53). [Chem 89]

The liquid crystal composition of the present invention may further contain a polymerizable compound. Although various compounds can be mentioned as a polymerizable compound, Preferably it contains at least 1 sort (s) of the compound represented by following General formula (P). [Chemical 90]

In the formula (P), Z ^p1 represents a fluorine atom, a cyano group, a hydrogen atom, an alkyl group having 1 to 15 carbon atoms in which a hydrogen atom may be substituted with a halogen atom, and a carbon atom having 1 hydrogen atom in which a hydrogen atom may be substituted. to 15 alkoxy group, a hydrogen atom may be substituted with halogen atoms, carbon atoms and an alkenyl group having 1 to 15 hydrogen atoms may be substituted with a halogen atom carbon atoms or an alkenyl group having 1 to 15 -Sp ^P2 - R ^p2 .

R ^p1 and R ^p2 each represent any one of the following formulae (RI) to (R-IX). [Chemical 91] (In the formula, by bonding with Sp ^p1 or Sp ^p2 by *, R ² to R ⁶ each independently represent a hydrogen atom, an alkyl group having 1 to 5 carbon atoms, or an alkyl group having 1 to 5 carbon atoms. Halogenated alkyl, W represents a single bond, -O- or methylene, T represents a single bond or -COO-, p, t and q each independently represent 0, 1 or 2)

Sp ^p1 and Sp ^p2 each represent a spacer, and L ^p1 and L ^p2 each independently represent a single bond, -O-, -S-, -CH _2- , -OCH _2- , -CH ₂ O-, -CO-, -C ₂ H _4- , -COO-, -OCO-, -OCOOCH _2- , -CH ₂ OCOO-, -OCH ₂ CH ₂ O-, -CO-NR ^a- , -NR ^a -CO-, -SCH _2- , -CH ₂ S-, -CH = CR ^a -COO-, -CH = CR ^a -OCO-, -COO-CR ^a = CH-, -OCO-CR ^a = CH-, -COO-CR ^a = CH-COO-, -COO-CR ^a = CH-OCO-, -OCO-CR ^a = CH-COO-, -OCO-CR ^a = CH-OCO-,-(CH ₂ ) _z -C (= O ) -O-,-(CH ₂ ) _z -O- (C = O)-, -O- (C = O)-(CH ₂ ) _z -,-(C = O) -O- (CH ₂ ) _z- , -CH ₂ (CH ₃ ) CC (= O) -O-, -CH ₂ (CH ₃ ) CO- (C = O)-, -O- (C = O) -C (CH ₃ ) CH ₂ ,-(C = O) -OC (CH ₃ ) -CH ₂ , -CH = CH-, -CF = CF-, -CF = CH-, -CH = CF-, -CF _2- , -CF ₂ O-, -OCF _2- , -CF ₂ CH _2- , -CH ₂ CF _2- , -CF ₂ CF _2- , or -C≡C- (wherein, R ^a each independently represents a hydrogen atom or carbon An alkyl group having 1 to 4 atoms, and z represents an integer of 1 to 4).

M ^p2 represents 1,4-phenylene, 1,4-cyclohexyl, anthracene-2,6-diyl, phenanthrene-2,7-diyl, pyridine-2,5-diyl, pyrimidine-2, 5-diyl, naphthalene-2,6-diyl, indane-2,5-diyl, 1,2,3,4-tetrahydronaphthalene-2,6-diyl, 1,3-dioxane Alkane-2,5-diyl or single bond, M ^{p2 is} unsubstituted or can pass through an alkyl group having 1 to 12 carbon atoms, a halogenated alkyl group having 1 to 12 carbon atoms, and an alkoxy group having 1 to 12 carbon atoms Group, a halogenated alkoxy group having 1 to 12 carbon atoms, a halogen atom, a cyano group, a nitro group, or -R ^p1 .

M ^p1 represents any one of the following formulae (i-11) to (ix-11). [Chemical 92] (In the formula, it is bonded to Sp ^p1 by * and L ^p1 , L ^{p 2,} or Z ^p1 by **)

M ^p3 represents any one of the following formulae (i-13) to (ix-13). [Chemical 93] (In the formula, it is bonded to Z ^p1 by *, and L ^{p 2} by **)

m ^p2 to m ^p4 each independently represent 0, 1, 2 or 3, m ^p1 and m ^p5 each independently represent 1, 2 or 3, and when there are multiple Z ^p1 , these may be the same or different from each other In the case where there is a plurality of R ^p1 , these may be the same or different from each other. In the case where there is a plurality of R ^p2 , these may be the same or different from each other. In the case where there is a plurality of Sp ^p1 , the these may be the same or different from each other, in a case where there are a plurality of Sp ^p2, the plurality may be identical or different from each other, in a case where there are a plurality of L ^p1, the plurality may be identical or different from each other, present in the M ^p2 In a plurality of cases, these may be the same as or different from each other.

The liquid crystal composition contains a polymerizable compound in addition to the alignment aid (the first compound and the second compound), whereby the pretilt angle of the liquid crystal molecules can be preferably formed. The liquid crystal composition is preferably a compound that does not contain a structure in which oxygen atoms such as a peracid (-CO-OO-) structure are bonded to each other.

When the reliability and long-term stability of the liquid crystal composition are important, the content of the compound having a carbonyl group with respect to the total amount of the liquid crystal composition is preferably 5% by mass or less, and more preferably 3% by mass or less. Furthermore, it is more preferable that it is 1 mass% or less, and it is most preferable that it does not contain substantially.

When the stability of UV irradiation is important, the content of the compound substituted with a chlorine atom with respect to the total amount of the liquid crystal composition is preferably 15% by mass or less, more preferably 10% by mass or less, and further preferably The content is preferably 8% by mass or less, particularly preferably 5% by mass or less, particularly preferably 3% by mass or less, and most preferably not substantially contained.

It is preferable to increase the content of a compound having a six-membered ring structure in the molecule, and it is preferable to set the content of a compound having a six-membered ring structure to the total amount of the liquid crystal composition. 80% by mass or more, more preferably 90% by mass or more, still more preferably 95% by mass or more, and most preferably substantially 100% by mass.

In order to suppress the deterioration caused by oxidation of the liquid crystal composition, it is preferable to reduce the content of the compound having a cyclohexenyl group as a ring structure, and it is preferable to reduce the content of the compound having a cyclohexenyl group to the total amount of the liquid crystal composition. The content of the compound is 10% by mass or less, more preferably 8% by mass or less, still more preferably 5% by mass or less, particularly preferably 3% by mass or less, and most preferably not substantially contained.

When the improvement of viscosity and the improvement of Tni are emphasized, it is preferred that the content of the compound having a 2-methylbenzene-1,4-diyl group in which a hydrogen atom can be replaced with a halogen atom is reduced, and The content of the compound having 2-methylbenzene-1,4-diyl group in the molecule relative to the total amount of the liquid crystal composition is preferably 10% by mass or less, more preferably 8% by mass or less, and further preferably The content is preferably 5% by mass or less, particularly preferably 3% by mass or less, and most preferably not substantially contained.

As used herein, the term "liquid crystal composition does not substantially contain" compound X "means that" compound X "is contained in an amount that is not inadvertently (inevitably) contained in the liquid crystal composition.

The lower limit of the average elastic constant (K _AVG ) of the liquid crystal composition is preferably 10 or more, 10.5 or more, 11 or more, 11.5 or more, 12 or more, 12.3 or more, 12.5 or more, 12.8 or more, 13 or more, 13.3 or more, and 13.5 or more. , 13.8 or more, 14 or more, 14.3 or more, 14.5 or more, 14.8 or more, 15 or more, 15.3 or more, 15.5 or more, 15.8 or more, 16 or more, 16.3 or more, 16.5 or more, 16.8 or more, 17 or more, 17.3 or more, 17.5 or more, 17.8 Above, 18 and above.

On the other hand, the preferable upper limit of the average elastic constant (K _AVG ) of the liquid crystal composition is 25 or less, 24.5 or less, 24 or less, 23.5 or less, 23 or less, 22.8 or less, 22.5 or less, 22.3 or less, 22 or less, 21.8 Below, below 21.5, below 21.3, below 21, below 20.8, below 20.5, below 20.3, below 20, below 19.8, below 19.5, below 19.3, below 19, below 18.8, below 18.5, below 18.3, below 18, below 17.8, 17.5 or less, 17.3 or less, and 17 or less.

When the reduction of power consumption is important, it is effective to suppress the amount of light in the backlight. The liquid crystal display element preferably improves light transmittance. Therefore, it is preferable to set the value of K _AVG to be slightly lower. When the improvement of response speed is important, it is preferable to set the value of K _AVG slightly higher.

(Liquid crystal display element) The liquid crystal composition of the present invention can be applied to a liquid crystal display element. Hereinafter, examples of the liquid crystal display element of this embodiment will be described with reference to FIGS. 1 and 2 as appropriate.

FIG. 1 is a diagram schematically showing a configuration of a liquid crystal display element. In FIG. 1, for convenience of explanation, the constituent elements are separated and shown. As shown in FIG. 1, the liquid crystal display element 1 according to this embodiment includes a first substrate 2 and a second substrate 3 which are arranged to face each other, and a liquid crystal layer 4 provided between the first substrate 2 and the second substrate 3. The liquid crystal layer 4 includes the liquid crystal composition.

A pixel electrode layer 5 is formed on the first substrate 2 on a surface on the liquid crystal layer 4 side. A common electrode layer 6 is formed on the second substrate 3 on the liquid crystal layer 4 side. The first substrate 2 and the second substrate 3 can be held by a pair of polarizing plates 7 and 8. A color filter 9 may be further provided on the liquid crystal layer 4 side of the second substrate 3.

That is, a liquid crystal display element 1 according to an embodiment includes a first polarizing plate 7, a first substrate 2, a pixel electrode layer 5, a liquid crystal layer 4 including a liquid crystal composition, a common electrode layer 6, a color filter 9, and a first The two substrates 3 and the second polarizing plate 8 are sequentially laminated.

The first substrate 2 and the second substrate 3 are formed of a flexible material such as glass or plastic. At least one of the first substrate 2 and the second substrate 3 is formed of a transparent material, and the other is formed of a transparent material, or may be formed of an opaque material such as metal or silicon.

The first substrate 2 and the second substrate 3 are bonded to each other by a sealing material such as an epoxy-based thermosetting composition and a sealing material arranged in the peripheral region. In order to maintain the distance between the substrates, for example, glass particles may be arranged. , Granular spacers such as plastic particles, alumina particles, or resin-containing spacers formed by photolithography.

The first polarizing plate 7 and the second polarizing plate 8 can be adjusted in such a manner that the polarization axis of each polarizing plate is adjusted so that the viewing angle or contrast becomes good, and it is preferable to have each other in such a manner that these transmission axes operate in a normal blackening mode Parallel transmission axis. It is particularly preferable that either of the first polarizing plate 7 and the second polarizing plate 8 is arranged so as to have a transmission axis parallel to the alignment direction of the liquid crystal molecules when no voltage is applied.

From the viewpoint of preventing light leakage, the color filter 9 preferably forms a black matrix, and preferably forms a black matrix (not shown) in a portion corresponding to the thin film transistor.

The black matrix can be set together with the color filter on the substrate opposite to the array substrate, or it can be set on the array substrate side with the color filter, or the black matrix can be set on the array substrate to separate the color filters. Set on another substrate. In addition, the black matrix may be provided separately from the color filter, but the transmittance may be reduced by repeating various colors of the color filter.

FIG. 2 is an enlarged plan view of an area surrounded by an I line as a part of the pixel electrode layer 5 formed on the first substrate 2 in FIG. 1. As shown in FIG. 2, in the pixel electrode layer 5 including a thin film transistor formed on the surface of the first substrate 2, a plurality of gate buses 11 for supplying a scanning signal and a plurality of data buses for supplying a display signal. 12 intersect each other and are arranged in a matrix. In addition, only a pair of gate buses 11, a gate bus 11, and a pair of data buses 12 and 12 are shown in FIG. 2.

A unit pixel of the liquid crystal display element is formed by using an area surrounded by the plurality of gate buses 11 and the plurality of data buses 12, and a pixel electrode 13 is formed in the unit pixel. The pixel electrode 13 has a so-called fish-bone structure including two stems orthogonal to each other to form a cross shape, and a plurality of branches extending from each stem.

A Cs electrode 14 is provided between the pair of gate buses 11 and the gate buses 11 in parallel with the gate buses 11. Further, a thin film transistor including a source electrode 15 and a drain electrode 16 is provided near the intersection where the gate bus 11 and the data bus 12 cross each other. A contact hole 17 is provided in the drain electrode 16.

The gate bus 11 and the data bus 12 are preferably formed of a metal film, more preferably Al, Cu, Au, Ag, Cr, Ta, Ti, Mo, W, Ni, or an alloy thereof, and further preferably Mo , Al or an alloy thereof.

In order to improve the transmittance, the pixel electrode 13 is preferably a transparent electrode. Transparent electrodes can be used for oxide semiconductors (ZnO, InGaZnO, SiGe, GaAs, Indium Zinc Oxide (IZO), Indium Tin Oxide (ITO), SnO, TiO, AZTO (AlZnSnO), etc.) It is formed by sputtering or the like. At this time, the film thickness of the transparent electrode may be 10 nm to 200 nm. In addition, in order to reduce the resistance, a transparent electrode can be formed as a polycrystalline ITO film by sintering an amorphous ITO film.

The liquid crystal display element of this embodiment can form wirings by sputtering metal materials such as Al or its alloy on the first substrate 2 and the second substrate 3 to form the pixel electrode layer 5 and the common electrode layer 6, respectively. The color filter 9 can be produced by, for example, a pigment dispersion method, a printing method, an electrodeposition method, or a dyeing method.

If a method for producing a color filter using the pigment dispersion method is described as an example, a hardening coloring composition for a color filter is applied to the transparent substrate, patterned, and heated by heating. Or light irradiation to harden it. This step is performed separately for three colors of red, green, and blue, whereby a pixel portion for a color filter can be manufactured. The color filter 9 may be provided on a substrate side including a TFT or the like.

The first substrate 2 and the second substrate 3 are opposed to each other such that the pixel electrode layer 5 and the common electrode layer 6 are inside, respectively. However, the interval between the first substrate 2 and the second substrate 3 may be adjusted through a spacer at this time. At this time, it is preferable to adjust so that the thickness of the liquid crystal layer 4 becomes 1 micrometer-100 micrometers, for example.

When the polarizing plate 7 and the polarizing plate 8 are used, it is preferable to adjust the product of the refractive index anisotropy Δn of the liquid crystal layer 4 and the thickness of the liquid crystal layer 4 so that the contrast becomes maximum. In addition, when there are two polarizing plates 7 and 8, the polarizing axis of each polarizing plate may be adjusted to adjust the viewing angle or the contrast so as to be good. Further, a retardation film for widening the viewing angle may be used. Thereafter, a sealant such as an epoxy-based thermosetting composition is screen-printed on the substrate in the form of a liquid crystal injection port, and the substrates are bonded to each other, and the sealant is thermally cured by heating.

The method of holding the composition between two substrates 2 and 3 can use a common vacuum injection method or an ODF (One Drop Fill) method. However, no drop marks are generated in the vacuum injection method. However, the problem of leaving traces of implantation can be more suitably used in a display element manufactured using the ODF method in this embodiment.

In the manufacturing process of the liquid crystal display element of the ODF method, an epoxy-based photothermal and hardening sealant is used to draw a closed-loop bank shape using a dispenser on the substrate of either the bottom plate or the front plate, and dripped into it under degassing. After adding a predetermined amount of the composition, the front plate and the rear plate are joined, whereby a liquid crystal display element can be manufactured.

In this embodiment, the ODF method can suppress the generation of drip marks when a liquid crystal composition is dripped on a substrate. The term “dropping mark” is defined as a phenomenon in which a drop of a liquid crystal composition is whitish and floats when black display is performed.

In addition, in the manufacturing process of the liquid crystal display element using the ODF method, an optimal liquid crystal injection amount is required to be dropped according to the size of the liquid crystal display element. However, the liquid crystal composition of this embodiment is generated when the liquid crystal is dropped, for example. The rapid pressure change or impact in the dropping device is small, and the liquid crystal can be continuously and continuously dropped for a long period of time. Therefore, the yield of the liquid crystal display element can also be kept high.

In particular, the optimal amount of liquid crystal to be injected is small among the small-sized liquid crystal display elements that are widely used in recent smartphones. Therefore, it is difficult to control the deviation from the optimal value within a certain range. However, by using the liquid crystal of this embodiment, The composition can also realize a stable liquid crystal material discharge amount in a small liquid crystal display element.

In the case where the first compound and the second compound each contain a polymerizable group and the liquid crystal composition contains a polymerizable compound, as a method of polymerizing these compounds, in order to obtain good alignment performance of the liquid crystal molecules, it is desirable to be moderate. The polymerization rate is preferably a method in which polymerization is performed by singly or in combination or sequentially irradiating active energy rays such as ultraviolet rays or electron beams. In the case of using ultraviolet light, a polarized light source or a non-polarized light source may be used.

When the liquid crystal composition is polymerized while being sandwiched between two substrates, at least the substrate on the irradiation surface side must provide appropriate transparency with respect to the active energy ray. In addition, it is also possible to use a method in which only a specific portion is polymerized by using a mask during light irradiation, and conditions such as an electric field, a magnetic field, or a temperature are changed, thereby changing the alignment state of the non-polymerized portion and further irradiating the activity. Energy lines to converge.

In particular, when performing ultraviolet exposure, it is preferable to apply an AC electric field to the liquid crystal composition and perform ultraviolet exposure. The applied AC electric field is preferably an AC having a frequency of 10 Hz to 10 kHz, more preferably a frequency of 60 Hz to 10 kHz, and the voltage is selected depending on a desired pretilt angle of the liquid crystal display element. That is, the pretilt angle of the liquid crystal display element can be controlled by the applied voltage. In a liquid crystal display element of a transverse electric field type multi-domain vertical alignment (MVA) mode, from the viewpoint of alignment stability and contrast, it is preferable to control the pretilt angle to 80 to 89.9 degrees.

The temperature during irradiation is preferably within a temperature range in which the liquid crystal state of the liquid crystal composition can be maintained. The liquid crystal composition is preferably polymerized at a temperature close to room temperature, that is, typically at a temperature of 15 ° C to 35 ° C. As a lamp which generates ultraviolet rays, a metal halide lamp, a high-pressure mercury lamp, an ultra-high-pressure mercury lamp, or the like can be used. In addition, as the wavelength of the ultraviolet rays to be irradiated, ultraviolet rays in a wavelength region other than an absorption wavelength region of the liquid crystal composition are preferably irradiated, and ultraviolet rays are preferably cut off as necessary.

The intensity of the irradiated ultraviolet rays is preferably 0.1 mW / cm ² to 100 W / cm ² , and more preferably 2 mW / cm ² to 50 W / cm ² . The energy of the irradiated ultraviolet rays can be adjusted as appropriate, but it is preferably 10 mJ / cm ² to 500 J / cm ² , and more preferably 100 mJ / cm ² to 200 J / cm ² . It is also possible to change the intensity when irradiated with ultraviolet rays. The time for irradiating ultraviolet rays can be appropriately selected depending on the intensity of the ultraviolet rays to be irradiated, but it is preferably 10 seconds to 3600 seconds, and more preferably 10 seconds to 600 seconds.

In the liquid crystal composition of the present invention, since the alignment aids (the first compound and the second compound) do not hinder the polymerization reaction of the polymerizable compound, the polymerizable compounds are preferably polymerized with each other, and unreacted polymerizability can be suppressed. The compound remains in the liquid crystal composition.

For example, when a compound represented by the general formula (P) is used as a polymerizable compound, the obtained liquid crystal display element 1 includes two substrates 2, a substrate 3, and two substrates 2 and 3 provided on the substrate 3. A liquid crystal layer 4 including a polymer of a first compound, a second compound, and a compound represented by general formula (P) in between. In this case, it is considered that the polymer of the first compound, the second compound, and the compound represented by the general formula (P) is biased toward the substrate 2 and the substrate 3 side that are present in the liquid crystal layer 4. When a polymerizable compound is not used, the liquid crystal layer 4 includes a polymer of the first compound and the second compound.

The liquid crystal display element 1 may be a liquid crystal display element for active matrix driving. The liquid crystal display element 1 may be a PSA type, a PSVA type, a VA type, an In-Plane Switching (IPS) type, a Fringe Field Switching (FFS) type, or an electrically controlled birefringence (ECB) ) Type liquid crystal display element, preferably a PSA type liquid crystal display element.

In the liquid crystal display element of this embodiment, a liquid crystal composition containing an alignment aid (a first compound and a second compound) is used. Therefore, it is not necessary to provide polyimide on the liquid crystal layer 4 side of the first substrate 2 and the second substrate 3. An alignment film such as an alignment film. In other words, the liquid crystal display element of this embodiment may have a configuration in which at least one of the two substrates does not have an alignment film such as a polyimide alignment film.

The alignment aid, the liquid crystal composition, and the liquid crystal display element of the present invention have been described based on the illustrated embodiments, but the present invention is not limited to this, and each configuration may be replaced with an arbitrary configuration having the same function. Add another arbitrary structure. [Example]

Hereinafter, examples of the present invention will be described, but the present invention is not limited to the following examples. The characteristics measured in the examples are as follows. T _ni : nematic phase-isotropic liquid phase transition temperature (° C) Δn: refractive index anisotropy at 20 ° C η: viscosity (mPa · s) at 20 ° C γ 1: rotational viscosity at 20 ° C ( mPa · s) Δε: dielectric constant anisotropy K _{33 at} 20 ° C: elastic constant K ₃₃ (pN) at 20 ° C

1. Preparation of Liquid Crystal Mixture The following abbreviations are used for the description of the compounds. <Ring Structure> [化 94]

<Side chain structure> [Table 1] (Where n in the table is a natural number)

＜ Connection structure ＞ [Table 2] (Where n in the table is a natural number)

(Liquid crystal mixture LC-1) First, a mixture HLC-1 with a formulation shown in Table 3 below was prepared. A liquid crystal mixture LC-1 was obtained by adding 0.3% by weight of the following polymerizable compound (R-1-0) to 100% by weight of this mixture HLC-1, and dissolving it by heating. [table 3]

[Chem 95]

(Liquid crystal mixture LC-2 to liquid crystal mixture LC-8) First, a mixture HLC-2 to a mixture HLC-8 with the formulation shown in Table 4 below was prepared. The liquid crystal mixture LC-2 to liquid crystal was obtained by adding 0.3% by weight of the polymerizable compound (R-1-0) to 100% by weight of each of these mixtures HLC-2 to HLC-8, and dissolving them by heating. Mixture LC-8. [Table 4]

(Liquid crystal mixture LC-9 to liquid crystal mixture LC-16) To 100% by weight of each of the mixtures HLC-1 to HLC-8, 0.3% by weight of the polymerizable compound (R-1-0) and 0.5% by weight of The following polymerizable compound (R-1-1) was dissolved by heating to obtain a liquid crystal mixture LC-9 to a liquid crystal mixture LC-16.

[Chem 96]

2. Preparation of liquid crystal composition (Example 1) 0.3% by weight of the compound (PJ-I-1) as the first compound and 0.3% by weight as the second compound based on 100% by weight of the liquid crystal mixture LC-1. Compound (PJ-II-1) to prepare a liquid crystal composition.

(Example 2) 0.5% by weight of the compound (PJ-I-1) and 0.5% by weight of the compound (PJ-II-1) were added to 100% by weight of the liquid crystal mixture LC-1 to prepare a liquid crystal composition. (Example 3) 0.5% by weight of the compound (PJ-I-1) and 1.0% by weight of the compound (PJ-II-1) were added to 100% by weight of the liquid crystal mixture LC-1 to prepare a liquid crystal composition.

(Examples 4 to 6) Preparation was performed in the same manner as in Examples 1 to 3 except that the first compound was changed from compound (PJ-I-1) to compound (PJ-I-2). Liquid crystal composition. (Example 7 to Example 9) Preparation was carried out in the same manner as in Example 1 to Example 3 except that the first compound was changed from compound (PJ-I-1) to compound (PJ-I-3). Liquid crystal composition.

(Examples 10 to 12) Preparation was performed in the same manner as in Examples 1 to 3 except that the first compound was changed from compound (PJ-I-1) to compound (PJ-I-4). Liquid crystal composition.

(Examples 13 to 15) Preparation was performed in the same manner as in Examples 1 to 3 except that the first compound was changed from compound (PJ-I-1) to compound (PJ-I-5). Liquid crystal composition. (Examples 16 to 18) A second compound was prepared in the same manner as in Examples 7 to 9 except that the second compound was changed from compound (PJ-II-1) to compound (PJ-II-2). Liquid crystal composition.

(Examples 19 to 21) A second compound was prepared in the same manner as in Examples 7 to 9 except that the second compound was changed from compound (PJ-II-1) to compound (PJ-II-3). Liquid crystal composition. (Examples 22 to 24) A second compound was prepared in the same manner as in Examples 7 to 9 except that the second compound was changed from the compound (PJ-II-1) to the compound (PJ-II-4). Liquid crystal composition.

(Example 25 to Example 27) A second compound was prepared in the same manner as in Example 4 to Example 6 except that the second compound was changed from compound (PJ-II-1) to compound (PJ-II-2). Liquid crystal composition. (Examples 28 to 30) A second compound was prepared in the same manner as in Examples 4 to 6 except that the second compound was changed from compound (PJ-II-1) to compound (PJ-II-3). Liquid crystal composition.

(Examples 31 to 33) A second compound was prepared in the same manner as in Examples 4 to 6 except that the second compound was changed from compound (PJ-II-1) to compound (PJ-II-4). Liquid crystal composition. (Example 34 to Example 43) A liquid crystal composition was prepared in the same manner as in Example 23 except that the liquid crystal mixture LC-1 was changed to the liquid crystal mixture LC-2 to the liquid crystal mixture LC-8.

Comparative Example 1 A liquid crystal composition was prepared in the same manner as in Example 1 except that the compound (PJ-I-1) and the compound (PJ-II-1) were not used. (Comparative Example 2 to Comparative Example 4) Preparation was performed in the same manner as in Example 1 except that 1.0% by weight of the following compounds Ref-1 to Compound Ref-3 were added to 100% by weight of the liquid crystal mixture LC-1. Liquid crystal composition.

[Chem 97]

(Comparative Example 5 to Comparative Example 13) In addition to 100% by weight of the liquid crystal mixture LC-1, 1.0% by weight of the compound (PJ-I-1) to the compound (PJ-I-5) and the compound (PJ- II-1) to compound (PJ-II-4), the same procedures as in Example 1 were performed to prepare a liquid crystal composition. (Comparative Example 14 to Comparative Example 20) Except that the compound (PJ-I-3) was added in an amount of 1.0% by weight based on 100% by weight of each of the liquid crystal mixture LC-1 to liquid crystal mixture LC-8. 1 was performed in the same manner to prepare a liquid crystal composition.

3. Evaluation The following evaluation tests were performed on each liquid crystal composition of Examples and Comparative Examples.

3-1. Evaluation test of low-temperature stability A membrane filter (manufactured by Agilent Technologies, PTFE 13 mm-0.2 μm) was used to filter the liquid crystal composition, and the liquid crystal composition was allowed to stand under vacuum and reduced pressure for 15 minutes for dissolution. Removal of air. It was washed with acetone and weighed 0.5 g in a sufficiently dried small glass bottle, and left to stand in a low temperature environment of -25 ° C for 14 days. Thereafter, the presence or absence of precipitation was visually observed, and judged by the following four stages.

A: Precipitation cannot be confirmed even after standing for 14 days. B: Precipitation was confirmed after standing for 7 days. C: Precipitation was confirmed after standing for 3 days. D: Precipitation was confirmed after standing for 1 day.

3-2. Evaluation Test of Vertical Alignment 1 First, a first substrate (common electrode substrate) having a transparent common electrode layer but no alignment film, and a pixel having a transparent pixel electrode driven by an active element are prepared. An electrode layer but a second substrate (pixel electrode substrate) without an alignment film. Next, a sealing material is arranged along the outer periphery of the first substrate, and a liquid crystal composition is dropped on the first substrate and inside the sealing material. After that, the second substrate is arranged to face the first substrate via the sealing material, and the liquid crystal composition is sandwiched between the first substrate and the second substrate. In this state, the sealing material was hardened under the conditions of normal pressure, 110 ° C., and 2 hours. Thus, a liquid crystal cell having a cell gap of 3.2 μm was obtained. The polarization unevenness at this time was used to observe the misalignment such as the vertical alignment and the drop marks, and the evaluation was performed in the following four steps.

A: Uniform vertical alignment is also included in the entire surface including the end portion, etc. B: There are few alignment defects, but it is an allowable level C: It also includes end portions, etc., and it has an unacceptable level with many alignment defects D: Alignment Bad bad

3-3. Evaluation Test of Vertical Alignment 2 First, a first substrate (filter substrate) having a color filter layer but no alignment film, and a substrate including a transparent pixel electrode driven by an active element were prepared. A second substrate (pixel electrode substrate) having a pixel electrode layer but without an alignment film. Next, a sealing material is arranged along the outer periphery of the first substrate, and a liquid crystal composition is dropped on the first substrate and inside the sealing material. After that, the second substrate is arranged to face the first substrate via the sealing material, and the liquid crystal composition is sandwiched between the first substrate and the second substrate. In this state, the sealing material was hardened under the conditions of normal pressure, 110 ° C., and 2 hours. Thus, a liquid crystal cell having a cell gap of 3.2 μm was obtained. The polarization unevenness at this time was used to observe the misalignment such as the vertical alignment and the drop marks, and the evaluation was performed in the following four steps.

A: Uniform vertical alignment is also included in the entire surface including the end portion, etc. B: There are few alignment defects, but it is an allowable level C: It also includes end portions, etc., and it has an unacceptable level with many alignment defects D: Alignment Bad bad

3-4. Evaluation Test of Vertical Alignment 3 First, a first substrate (electrode filter substrate) is prepared that includes both a patterned transparent common electrode layer portion and a color filter layer portion and does not have an alignment film. A second substrate (pixel electrode substrate) having a transparent pixel electrode portion and a pixel electrode layer driven by an active element, and a portion of a color filter layer portion but without an alignment film. Next, a sealing material is arranged along the outer periphery of the first substrate, and a liquid crystal composition is dropped on the first substrate and inside the sealing material. After that, the second substrate is arranged to face the first substrate via the sealing material, and the liquid crystal composition is sandwiched between the first substrate and the second substrate. In this state, the sealing material was hardened under the conditions of normal pressure, 110 ° C., and 2 hours to obtain a liquid crystal cell having a cell gap of 3.5 μm. The polarization unevenness at this time was used to observe the misalignment such as the vertical alignment and the drop marks, and the evaluation was performed in the following four steps.

A: It also includes vertical alignment uniformly on the entire surface including the borders and end portions of the pattern substrate. B: It has few alignment defects but is tolerable. C: It also includes end portions and many alignment defects, which is unacceptable. Level D: Poor alignment is pretty bad

3-5. Evaluation test of formation of pretilt angle A rectangular AC wave of 10 V and 100 Hz was applied to the liquid crystal cell used in the "3-2. Evaluation Test of Vertical Alignment 1" and irradiated with a high-pressure mercury lamp for 200 seconds. The irradiance at 365 nm is 100 m / cm ² of UV light. Then, for the stability of the white display, a rectangular AC wave of 10 V and 100 Hz was applied, and a physical external force was applied to the unit. The observation was performed in the state of orthogonal Nicols, and evaluation was performed in the following four stages.

A: Uniform vertical alignment is also included in the entire surface including the end portion, etc. B: There are few alignment defects, but it is an allowable level C: It also includes end portions, etc., and it has an unacceptable level with many alignment defects D: Alignment Bad bad

3-6. Evaluation Test of Residual Monomer Amount The unit used in the "3-5. Evaluation Test of Pretilt Angle Formation" was further irradiated with UV light from Toshiba Lighting & Technology Co., Ltd. for 60 minutes. Light lamp (irradiance at 313 nm is 1.7 mW / cm ² ), the residual amount of the polymerizable compound (R1-1-0) after irradiation is quantified by HPLC, and the residual monomer amount is determined. Evaluation was performed based on the remaining amount of the monomer in the following four stages.

A: Less than 300 ppm B: More than 300 ppm and less than 500 ppm C: More than 500 ppm and less than 1500 ppm D: More than 1500 ppm

3-7. Evaluation test of response characteristics For the unit with a cell gap of 3.2 μm used in the "3-5. Evaluation Test of Pretilt Angle Formation", Toshiba Lighting & Technology Co., Ltd. was irradiated for 60 minutes. Manufactured UV fluorescent lamp (1.7 mW / cm ^{2 at} 313 nm). The response speed was measured for the unit thus obtained. The response speed was measured at 25 ° C using a DMS703 from AUTRONIC-MELCHERS to measure Voff at 6 V. The response characteristics were evaluated in the following four steps.

A: less than 5 ms B: more than 5 ms and less than 15 ms C: more than 15 ms and less than 25 ms D: more than 25 ms

[table 5] [TABLE 6] [TABLE 7] [TABLE 8] [TABLE 9] [TABLE 10]

As described above, it is understood that the alignment aid and the liquid crystal composition of the present invention have excellent alignment restraining force of liquid crystal molecules and high storage stability. In addition, it can be seen that the liquid crystal display element of the present invention has excellent response characteristics. In addition, in the same manner as in Examples 1 to 40 and Comparative Examples 1 to 20, various alignment aids were added to the liquid crystal mixture LC-9 to the liquid crystal mixture LC-16 and dissolved by heating to obtain a liquid crystal composition. The vertical alignment of these liquid crystal compositions was evaluated in the same manner as described above. As a result, it was confirmed that the alignment was better in the examples than in the comparative examples.

1‧‧‧LCD display element

2‧‧‧ the first substrate

3‧‧‧second substrate

4‧‧‧ LCD layer

5‧‧‧ pixel electrode layer

6‧‧‧Common electrode layer

7, 8‧‧‧ polarizing plate

9‧‧‧ color filter

11‧‧‧Gate bus

12‧‧‧Data Bus

13‧‧‧pixel electrode

14‧‧‧Cz electrode

15‧‧‧Source electrode

16‧‧‧ Drain electrode

17‧‧‧ contact hole

I‧‧‧ part of the pixel electrode layer

FIG. 1 is a view schematically showing an embodiment of a liquid crystal display element. FIG. 2 is an enlarged plan view of an area surrounded by an I line in FIG. 1.

Claims (21)

An alignment aid is characterized in that it is arranged between two substrates together with liquid crystal molecules and spontaneously aligns the liquid crystal molecules. The alignment aid contains: a first compound containing At least one first affinity group having an affinity; and a second compound including at least one second affinity group having an affinity with respect to the substrate and having a lower polarity than the first affinity group. The alignment aid according to item 1 of the scope of patent application, wherein each of the first compound and the second compound contains at least one polymerizable group. The alignment aid according to item 2 of the scope of patent application, wherein the polymerizable group is selected from the group represented by the following general formula (P-1) to (P-13): In the formula, a black dot at the right end represents a bonding bond. The alignment aid according to any one of claims 1 to 3, wherein the first affinity group and the second affinity group each include a group selected from the following groups: In the formula, a black dot indicates a bonding bond. The alignment aid according to item 4 of the scope of patent application, wherein the first affinity group is selected from the group represented by the following general formula (K1-1) to (K1-3): In the formula, the black dot at the left end represents a bonding bond, W ^K2 represents a methine group, C-CH ₃ , CC ₂ H ₅ , a nitrogen atom, or a silicon atom, W ^K3 represents a carbon atom, and X ₁ to X ₅ each independently represent hydrogen Atom, -OH group or CH ₂ = C (CH ₃ ) COO-, at least one of X ₁ and X ₂ represents -OH group, and at least one of X ₃ , X ₄ and X ₅ represents -OH group, Sp ₁ , Sp ₂ and Sp ₃ each represent a single bond or a spacer; the second affinity group is selected from the group represented by the following general formula (K2-1) to (K2-14): In the formula, the black dot on the left end represents a bonding bond, and any methylene group can independently pass through a linear or branched alkyl group having 1 to 5 carbon atoms, and a linear or branched alkoxy group having 1 to 5 carbon atoms. Or a linear or branched perfluoroalkyl group having 1 to 5 carbon atoms, W ^{K 1} represents a methine group, C-CH ₃ , CC ₂ H _5, or a nitrogen atom, and X ^K1 and Y ^K1 are each independently Represents -CH _2- , an oxygen atom or a sulfur atom, Z ^K1 represents an oxygen atom or a sulfur atom, U ^K1 , V ^K1 and S ^K1 each independently represent a methine or nitrogen atom, wherein U ^K1 is a methine or V Except for the combination of ^K1 being a methine group and S ^K1 being a nitrogen atom, R ^K1 represents a hydrogen atom, a linear or branched alkyl group having 1 to 5 carbon atoms, and a linear or branched alkoxy group having 1 to 5 carbon atoms. Or a linear or branched perfluoroalkyl group having 1 to 5 carbon atoms. The alignment aid according to item 4 or item 5 of the patent application scope, wherein the first affinity group includes a hydroxyl group and the second affinity group includes an ether group or a carbonate group. The alignment aid according to any one of items 2 to 6 of the scope of the patent application, wherein the first compound and the second compound each include a mesogen, the first affinity group, the second compound The affinity group and the polymerizable group are each bonded to the mesogen group directly or via a spacer. The alignment aid according to item 7 of the scope of patent application, wherein the first compound and the second compound each include a first affinity group or a second affinity group bonded to the mesogen group. The terminal group on the opposite side of the affinity group. The alignment aid according to item 8 of the scope of the patent application, wherein the terminal group is a linear or branched alkyl group having 1 to 40 carbon atoms, and a linear or branched halide alkyl group having 1 to 40 carbon atoms. Is represented by a polymerizable group bonded to the mesogenic group directly or via a spacer, wherein -CH ₂ -in an alkyl group or a halogenated alkyl group may be -CH = CH-, -C≡C -, -O-, -NH-, -COO- or -OCO- are substituted, but -O- is not continuous. The alignment aid according to any one of claims 5, 7 to 9, in which the spacer is -CH = CH-, -CF = CF-, -C≡C-, -COO-, -OCO-, -OCOO-, -OOCO-, -CF ₂ O-, -OCF _2- , -CH = CHCOO-, -OCOCH = CH-, -CH ₂ -CH ₂ COO-, -OCOCH ₂ -CH _2- , -CH = C (CH ₃ ) COO-, -OCOC (CH ₃ ) = CH-, -CH ₂ -CH (CH ₃ ) COO-, -OCOCH (CH ₃ ) -CH _2- , -OCH ₂ CH ₂ O- or a linear or branched alkylene group having 1 to 20 carbon atoms, in which one or two or more adjacent -CH ₂ -alkylene groups may pass through -O-, -COO- or -OCO- substitution. The alignment aid according to any one of claims 7 to 10 in the scope of patent application, wherein the mesogen of the liquid crystal is represented by the following general formula (i): In the formula, the black dot at the left end and the black dot at the right end represent bonding bonds, and A ⁱ¹ represents a divalent 6-membered ring aromatic group, a divalent 6-membered ring heteroaromatic group, a divalent 6-membered ring aliphatic group, or A bivalent 6-membered ring heteroaliphatic group, the hydrogen atoms in these ring structures may pass through a halogen atom, a straight or branched alkyl group having 1 to 10 carbon atoms, or a straight or branched chain having 1 to 10 carbon atoms. Halogenated alkyl group, linear or branched alkoxy group having 1 to 10 carbon atoms, or P ⁱ¹ -Sp ⁱ¹ -substitution. Here, P ⁱ¹ represents a group selected from the general formula (P-1) to the general formula ( P-13) a group represented by the polymerizable group, Sp ⁱ¹ represents the same meaning as Z ^i1, Z ⁱ¹ represents a single bond, -CH = CH -, - CF = CF -, - C≡C -, - COO-, -OCO-, -OCOO-, -OOCO-, -CF ₂ O-, -OCF _2- , -CH = CHCOO-, -OCOCH = CH-, -CH ₂ -CH ₂ COO-, -OCOCH ₂ -CH _2- , -CH = C (CH ₃ ) COO-, -OCOC (CH ₃ ) = CH-, -CH ₂ -CH (CH ₃ ) COO-, -OCOCH (CH ₃ ) -CH ₂ -,- OCH ₂ CH ₂ O- or an alkylene group having 2 to 20 carbon atoms, in which one or two or more adjacent -CH ₂ -groups of the alkylene group may pass through -O-, -COO-, or -OCO - substituted, m ⁱ¹ represents an integer of 1 to 5 , In the case where m ⁱ¹ is 2 or more, a plurality of A ⁱ¹ may be identical or different from each other. A liquid crystal composition comprising the alignment aid as described in any one of claims 1 to 11 and a liquid crystal molecule, and has a negative dielectric constant anisotropy (Δε). The liquid crystal composition according to item 12 of the scope of patent application, wherein the liquid crystal molecules include a compound selected from the group represented by the following general formula (N-1) to (N-3): In the formula, R ^N11 , R ^N12 , R ^N21 , R ^N22 , R ^N31, and R ^N32 each independently represent an alkyl group having 1 to 8 carbon atoms, in which one of the alkyl groups or two or more non-adjacent- CH ₂ -can be independently replaced by -CH = CH-, -C≡C-, -O-, -CO-, -COO-, or -OCO-, A ^N11 , A ^N12 , A ^N21 , A ^N22 , A ^N31 And A ^N32 each independently represent a group selected from the group consisting of the following groups (a), (b), (c) and (d): (a) 1,4-cyclohexyl, Among them, one —CH ₂ — or two or more —CH ₂ — that are present in the group may be substituted with —O—, (b) 1,4-phenylene, wherein One of the groups -CH = or two or more -CH = which are not adjacent may be substituted by -N =, (c) naphthalene-2,6-diyl, 1,2,3,4-tetrahydronaphthalene -2,6-diyl or decalin-2,6-diyl, which is present in naphthalene-2,6-diyl or 1,2,3,4-tetrahydronaphthalene-2,6-diyl One of -CH = or two or more -CH = which are not adjacent may be substituted by -N =, and (d) 1,4-cyclohexenyl, the groups (a), (b) , Radical (c) and radical (d) are independently independently Atom or a chlorine ^{atom, Z N11, Z N12, Z} N21, Z N22, Z N31 and Z ^N32 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- X ^N21 represents a hydrogen atom or a fluorine atom, T ^N31 represents -CH ₂ -or an oxygen atom, n ^N11 , n ^N12 , n ^N21 , n ^N22 , n ^N31, and n ^N32 each independently represent an integer of 0 to 3, and n ^N11 + n ^N12 , n ^N21 + n ^N22, and n ^N31 + n ^N32 are independently 1, 2, or 3, and when there are multiple A ^N11 to A ^N32 and Z ^N11 to Z ^N32 , these may be mutually The same or different. The liquid crystal composition according to claim 12 or claim 13, wherein the liquid crystal molecules include a compound represented by the following general formula (L): In the formula, R ^L1 and R ^L2 each independently represent an alkyl group having 1 to 8 carbon atoms, and one of the alkyl groups or two or more -CH ₂ -which are not adjacent to each other can be independently selected from -CH = CH- , -C≡C-, -O-, -CO-, -COO-, or -OCO-, n ^L1 represents 0, 1, 2 or 3, and A ^L1 , A ^L2, and A ^L3 are independently selected from the group consisting of Said radicals in the group consisting of radicals (a), (b) and (c): (a) 1,4-cyclohexyl, wherein one of the radicals -CH ₂ -or Non-adjacent two or more -CH ₂ -may be substituted with -O-, (b) 1,4-phenylene, wherein one of the groups -CH = or two or more non-adjacent -CH = may be substituted by -N =, and (c) naphthalene-2,6-diyl, 1,2,3,4-tetrahydronaphthalene-2,6-diyl, or decahydronaphthalene-2, 6-diyl, one of which is present in naphthalene-2,6-diyl or 1,2,3,4-tetrahydronaphthalene-2,6-diyl -CH = or two or more adjacent -CH = may be substituted by -N =, the groups (a), (b), and (c) may be independently substituted by a cyano group, a fluorine atom, or a chlorine atom, and Z ^L1 and Z ^L2 are each independently 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 n ^{L 1} is 2 or 3 and there are multiple A ^{L 2} , these may be the same as or different from each other, where n ^{L 1} is 2 or 3 and Z ^{L 2} is multiple In the case of these, these may be the same as or different from each other, except for compounds represented by the general formula (N-1), the general formula (N-2), and the general formula (N-3). The liquid crystal composition according to any one of claims 12 to 14 of the scope of patent application, further comprising a polymerizable compound. The liquid crystal composition according to item 15 of the scope of patent application, wherein the polymerizable compound includes at least one kind of a compound represented by the following general formula (P): In the formula, Z ^p1 represents a fluorine atom, a cyano group, a hydrogen atom, a hydrogen atom having 1 to 15 carbon atoms, and a hydrogen atom may be substituted with a halogen atom having 1 to 15 carbon atoms. An alkoxy group, an alkenyl group having 1 to 15 carbon atoms whose hydrogen atom may be substituted with a halogen atom, an alkenyl group having 1 to 15 carbon atoms whose hydrogen atom may be substituted with a halogen atom, or -Sp ^p2 -R ^p2 , R ^p1 and R ^p2 each represent any one of the following formulae (RI) to (R-IX): In the formula, by bonding with Sp ^p1 or Sp ^p2 by *, R ² to R ⁶ each independently represent a hydrogen atom, an alkyl group having 1 to 5 carbon atoms, or a halogenation of 1 to 5 carbon atoms. Alkyl, W represents a single bond, -O- or methylene, T represents a single bond or -COO-, p, t and q each independently represent 0, 1 or 2, Sp ^p1 and Sp ^p2 each represent a spacer, L ^p1 and L ^p2 each independently represent a single bond, -O-, -S-, -CH _2- , -OCH _2- , -CH ₂ O-, -CO-, -C ₂ H _4- , -COO- , -OCO-, -OCOOCH _2- , -CH ₂ OCOO-, -OCH ₂ CH ₂ O-, -CO-NR ^a- , -NR ^a -CO-, -SCH _2- , -CH ₂ S-,- CH = CR ^a -COO-, -CH = CR ^a -OCO-, -COO-CR ^a = CH-, -OCO-CR ^a = CH-, -COO-CR ^a = CH-COO-, -COO-CR ^a = CH-OCO-, -OCO-CR ^a = CH-COO-, -OCO-CR ^a = CH-OCO-,-(CH ₂ ) _z -C (= O) -O-,-(CH ₂ ) _z -O- (C = O)-, -O- (C = O)-(CH ₂ ) _z -,-(C = O) -O- (CH ₂ ) _z- , -CH ₂ (CH ₃ ) CC (= O) -O-, -CH ₂ (CH ₃ ) CO- (C = O)-, -O- (C = O) -C (CH ₃ ) CH ₂ ,-(C = O) -OC (CH ₃ ) -CH ₂ , -CH = CH-, -CF = CF-, -CF = CH-, -CH = CF-, -CF _2- , -CF ₂ O-, -OCF _2- , -CF _{2 CH 2 -, - CH 2} CF 2 -, - CF 2 CF 2 - or -C≡C-, wherein In the formula, R ^a each independently represent a hydrogen atom or an alkyl group of 1 to 4, z represents an integer of 1 to 4, M ^p2 represents 1,4-phenylene, 1,4-cyclohexylene, anthracene -2,6-diyl, phenanthrene-2,7-diyl, pyridine-2,5-diyl, pyrimidine-2,5-diyl, naphthalene-2,6-diyl, indane-2, 5-diyl, 1,2,3,4-tetrahydronaphthalene-2,6-diyl, 1,3-dioxane-2,5-diyl or single bond, M ^{p2 is} unsubstituted or can be Alkyl group having 1 to 12 carbon atoms, halogenated alkyl group having 1 to 12 carbon atoms, alkoxy group having 1 to 12 carbon atoms, halogenated alkoxy group having 1 to 12 carbon atoms, halogen atom, cyano group, Nitro or -R ^p1 substitution, and M ^p1 represents any one of the following formulae (i-11) to (ix-11): In the formula, Sp ^{p1 is} bonded with *, and L ^p1 , L ^{p 2,} or Z ^{p1 is} bonded with **. M ^p3 represents the following formulae (i-13) to (ix-13) Either: In the formula, Z ^{p1 is} bonded with *, and L ^{p 2 is} bonded with **. M ^p2 to m ^p4 each independently represent 0, 1, 2, or 3, and m ^p1 and m ^p5 are each independent. represents 1, 2 or 3, in the case where there are a plurality of Z ^p1, the plurality may be identical or different from each other, in a case where a plurality of R ^p1, the plurality may be identical or different from each other, are present in multiple R ^p2 In the case of each, these may be the same as or different from each other. In the case of multiple Sp ^p1 , these may be the same or different from each other. In the case of multiple Sp ^p2 , these may be the same or different. Different, when there are multiple L ^p1 , these may be the same or different from each other, and when there are multiple M ^p2 , these may be the same or different from each other. A liquid crystal display element, comprising: two substrates; and a liquid crystal layer provided between the two substrates and including the liquid crystal composition according to any one of claims 12 to 16 in the scope of patent application. . The liquid crystal display element according to claim 17 in the application scope, wherein the liquid crystal layer includes a polymer of the first compound and the second compound. The liquid crystal display element according to item 17 or item 18 of the scope of patent application, which is used for active matrix driving. The liquid crystal display device according to any one of claims 17 to 19 of the scope of application for a patent, which is a polymer stable alignment type, a polymer stable vertical alignment type, a vertical alignment type, a coplanar switching type, and a fringe field switching type Or electronically controlled birefringence type. The liquid crystal display element according to any one of claims 17 to 20 in the scope of patent application, wherein at least one of the two substrates does not have an alignment film.