JP6871307B2 - Liquid crystal display element - Google Patents

Description

The present invention relates to a liquid crystal composition and a liquid crystal display device using the same.

Liquid crystal display elements are used in various household electric appliances, industrial measuring instruments, automobile panels, mobile phones, smartphones, notebook PCs, tablet PCs, televisions, and the like, including watches and calculators. Typical liquid crystal display methods are TN (twisted nematic) type, STN (super twisted nematic) type, GH (guest host) type, IPS (inplane switching) type, and FFS (fringe field switching) type. , OCB (optically compensated birefringence) type, ECB (voltage controlled birefringence) type, VA (vertical orientation) type, CSH (color superhomeotropic) type, FLC (ferroelectric liquid crystal display) and the like. Examples of the drive method include static drive, multiplex drive, simple matrix method, and active matrix (AM) method driven by TFT (thin film transistor), TFD (thin film diode), and the like. In these display methods, for the IPS type, FFS type, ECB type, VA type, CSH type, etc., a liquid crystal composition (n-type liquid crystal composition) in which the dielectric anisotropy (Δε) shows a negative value is used. It is known to exhibit advantageous properties.

The mainstream display method using the n-type liquid crystal composition is typified by VA type, PSA (Polymer Standardized Alignment) type in which the orientation is controlled by polymerizing a polymerizable compound in the liquid crystal phase, or PSVA (Polymer Standarded Vertical Alignment) type. There are a vertical orientation method and a horizontal orientation method typified by IPS type and FFS type. The vertical orientation method is characterized by a wide viewing angle, high transmittance, high contrast, and fast response speed, and is mainly used for large display elements such as TVs and monitors. On the other hand, the horizontal orientation method is used in mobile devices such as smartphones and tablet PCs from the viewpoints of wide viewing angle, high transmittance, low power consumption, and optimality with touch panels, and is also used in LCD TVs. Is also progressing.

As a liquid crystal composition having a negative Δε, a liquid crystal composition using the following liquid crystal compounds (A) and (B) having a 2,3-difluorophenylene skeleton (see Patent Document 1) is disclosed.

This liquid crystal composition uses liquid crystal compounds (C) and (D) as liquid crystal compounds having substantially 0 Δε, but has a sufficiently low viscosity in a liquid crystal composition such as a liquid crystal television that requires a high-speed response. It has not been realized yet.

On the other hand, a liquid crystal composition using the liquid crystal compound (E) has already been disclosed, but a liquid crystal composition in which the above liquid crystal compound (D) is combined and has a small refractive index anisotropy (Δn) (see Patent Document 2). A liquid crystal composition (see Patent Document 3) to which a liquid crystal compound (F) is added in order to improve the response speed is introduced.

Further, a liquid crystal composition using the liquid crystal compound (G) and the liquid crystal compound (F) has already been disclosed (see Patent Document 4), but an even faster response speed has been required.

Further, the liquid crystal compound (I) having a large Δn and a large bending elastic constant (K ₃₃₎

A liquid crystal composition (see Patent Document 5) in which the above is combined has been disclosed, but a faster response speed and a higher voltage retention rate (VHR) have been required.

From the above, it has become necessary for any liquid crystal composition to achieve both a high response speed and a high VHR required for a liquid crystal display element at a higher level.

Patent Document 6 discloses that the response speed of a homeotropic liquid crystal cell is improved by using a liquid crystal material having a large index represented by (Equation 1). However, the disclosed liquid crystal materials did not exhibit sufficient performance.

(In the formula, K ₃₃ represents the elastic constant, Δn represents the refractive index anisotropy, and γ1 represents the rotational viscosity.)
Further, in Non-Patent Document 1, it is known that the response speed of the liquid crystal material is expressed by the following equation regardless of the driving method.

Here, τ _off is the response speed when the voltage is not applied from the voltage applied state, γ ₁ is the rotational viscosity of the liquid crystal material, d is the thickness of the liquid crystal layer, and k is the elastic constant. Therefore, it can be seen that the reduction _{of γ 1} and the increase of k are universally effective for reducing the response speed.

Next, the front contrast ratio (hereinafter, contrast) in the liquid crystal display device has a finite value (hereinafter, black brightness) rather than zero brightness in the black display, and therefore, in the white display determined by the effective transmittance of the liquid crystal panel. It is defined by the value obtained by dividing the brightness (hereinafter, white brightness) by the black brightness. Therefore, the contrast can be increased by setting the white brightness as large as possible and / or setting the black brightness as a small value. Generally, reducing the black brightness makes a greater contribution.

It is known that since the liquid crystal material is thermally moving, light scattering occurs and the black brightness is increased to reduce the contrast. The factor that increases the black brightness here is light leakage in the front direction (perpendicular direction with respect to the liquid crystal layer) of the liquid crystal display. This effect is generally greater in the horizontal orientation mode than in the vertical orientation mode.

In Patent Document 7 and Non-Patent Document 2, the following equation has been proposed with respect to light leakage caused by the liquid crystal layer, and has been confirmed experimentally.

Here, I in the formula is the light leakage of the liquid crystal layer (transmittance is observed when placed orthogonally polarizing plates) intensity, S _lc scattering index, [Delta] n is the refractive index anisotropy of the liquid crystal material, n _e the extraordinary refractive index, n _o is the ordinary refractive index, d is the thickness of the liquid crystal layer, K is means an average elastic constant _can be expressed as _{(K 11 + K 22 + K} 33) / 3. Note that K ₁₁ represents the elastic constant of spread, K ₂₂ represents the elastic constant of twist, and K ₃₃ represents the elastic constant of bending. Since these [Delta] n, n _e, n _o and d is substantially fixed in the panel design, the liquid crystal composition, [Delta] n, n _e, while satisfying n _o (required to a value of going to [Delta] n × d.) , K is required to be increased, and by achieving this, the black brightness of the liquid crystal display element can be lowered and the contrast can be improved.

From the above, in the liquid crystal composition, the nematic phase-isotropic liquid phase transition temperature ( _TNI ) is high, the solid phase-nematic phase transition temperature ( _TCN ) is low, and excellent low temperature storage stability is essential. Further, it is required that the rotational viscosity (γ ₁ ) is sufficiently small, the refractive anisotropy (Δn) is large, and the elastic constant (k or K) is large. It has been required to achieve both high response speed and high contrast.

Japanese Patent Application Laid-Open No. 8-104869 European Patent Application Publication No. 04744062 Japanese Patent Application Laid-Open No. 2006-037054 Japanese Patent Application Laid-Open No. 2001-354967 JP-A-2017-52960 JP 2006-301643 Patent No. 4682376

EKISHO Vol. 5 No. 3 p. 253 (63) 2001 EKISHO Vol. 13 No. 2 p. 119 (35) 2009

The problem to be solved by the present invention is to provide a liquid crystal composition having improved response speed and contrast ratio while satisfying the above-mentioned characteristics required for a liquid crystal composition, and also to provide a liquid crystal display element using the same. That is.

The present inventor has found that the above problems can be solved by examining various liquid crystal compounds and various chemical substances, selecting them, and adjusting their contents, and have completed the present invention. ..

The liquid crystal composition of the present invention satisfies various characteristics required for the liquid crystal composition, has improved response speed and contrast ratio, and has excellent display characteristics. In particular, excellent characteristics are exhibited by using a liquid crystal composition having a negative dielectric anisotropy (Δε). The liquid crystal display element of the present invention can provide a liquid crystal display element such as a VA type, an FFS type, or an IPS type. This liquid crystal display element is suitable for mobile phones, smartphones, notebook PCs, tablet PCs, in-vehicle LCDs, PIDs (Public Information Display), TVs, monitors, and the like.

Hereinafter, unless otherwise specified,% means mass%.

The composition of the present invention contains a compound represented by the formula (i), and is further selected from a group of compounds represented by the general formula (N-1d) and the general formula (N-1). Contains the above compounds.

^{(Wherein, R Nd11} and ^{R Nd12} each independently represents an alkyl group having 1 to 8 carbon atoms, one or non-adjacent two or more -CH ₂ in the alkyl group - is independently It may be replaced by -CH = CH-, -C≡C-, -O-, -CO-, -COO- or -OCO-.
n ^Nd11 represents 1, 2 or 3. )

^{(Wherein, R N11} and ^{R N12} are each independently an alkyl group having 1 to 8 carbon atoms, one or non-adjacent two or more -CH ₂ in the alkyl group - is independently It may be replaced by -CH = CH-, -C≡C-, -O-, -CO-, -COO- or -OCO-.
n ^N11 and n ^N12 independently represent 0, 1, 2 or 3, while n ^N11 + n ^N12 represent 1, 2 or 3, respectively.
A ^N11 and A ^N12 are independent of each other.
(A) 1,4-cyclohexylene group, (this is present in the group one -CH ₂ - - or nonadjacent two or more -CH ₂ may be replaced by -O-.)
(B) 1,4-phenylene group (one -CH = existing in this group or two or more -CH = not adjacent to each other may be replaced with -N =) and (c). Naphthalene-2,6-diyl group, 1,2,3,4-tetrahydronaphthalene-2,6-diyl group or decahydronaphthalene-2,6-diyl group (naphthalene-2,6-diyl group or 1,2) , 3,4-Tetrahydronaphthalene-2,6-Diyl Group, one -CH = or two or more non-adjacent -CH = may be replaced with -N =).
Represents a group selected from the group consisting of, and the above groups (a), groups (b) and groups (c) are independently alkyl groups (one −CH ₂ − or adjacent to each other present in this group). Two or more -CH _2- that are not present may be replaced by -O-), an alkenyl group (one -CH _2- that is present in this group, or two or more -CHs that are not adjacent to each other. _2- may be replaced with −O−), may be substituted with a cyano group, a fluorine atom or a chlorine atom.
Z ^N11 and ^{Z N12} are each independently 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−
If there are multiple A ^N11 and / or A ^N12 , they may be the same or different, ^{and if there are multiple Z N11} and / or Z ^N12 , they may be the same or different. However, the compound represented by the general formula (N-1d) is excluded. )
The lower limit of the preferable content of the compound represented by the formula (i) in the liquid crystal composition of the present application is 1%, 2%, 3%, 5%, 6%, which is preferable. The upper limit of the content is 15%, 13%, 12%, 10%, 8%, and 7%. A large content is preferable for improving the response speed and the contrast ratio, but it is not preferable to increase the content too much when the storage stability at a low temperature is important.

The compound represented by the general formula (N-1d) corresponds to a dielectrically negative compound (the sign of Δε is negative and its absolute value is larger than 2).

As the compound represented by the general formula (N-1d), only one kind may be used, or two or more kinds may be used in combination. It is also possible to use 3 types or a combination of 4 or more types.

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

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

^{(Wherein, R Nd11} and ^{R Nd12} each independently represents an alkyl group having 1 to 8 carbon atoms, one or non-adjacent two or more -CH ₂ in the alkyl group - is independently It may be replaced by -CH = CH-, -C≡C-, -O-, -CO-, -COO- or -OCO-.
n ^Nd11 represents 1, 2 or 3. )
As the compound represented by the general formula (N-1d), only one kind may be used, but two or more kinds may be used.

In the general formula (N-1d), ^RNd11 is an alkyl group having 1 to 8 carbon atoms, an alkoxy group having 1 to 8 carbon atoms, an alkenyl group having 2 to 8 carbon atoms, or an alkenyl having 2 to 8 carbon atoms. An oxy group is preferable, an alkyl group having 1 to 5 carbon atoms, an alkoxy group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms, or an alkenyloxy group having 2 to 5 carbon atoms is preferable. Alkyl groups having 1 to 5 carbon atoms or alkoxy groups having 2 to 5 carbon atoms are more preferable, alkyl groups having 2 to 5 carbon atoms or alkoxy groups having 2 to 3 carbon atoms are further preferable, and alkoxy groups having 3 carbon atoms are more preferable. A group (propenyl group) is particularly preferable. A linear alkyl group having 1 to 5 carbon atoms, a linear alkoxy group having 1 to 4 carbon atoms, and a linear alkenyl group having 2 to 5 carbon atoms are preferable. In order to stabilize the nematic phase, the total of carbon atoms and oxygen atoms, if present, is preferably 5 or less, and is preferably linear.

Particularly preferred are ethyl and propyl groups.

R ^Nd12 is preferably an alkyl group having 1 to 8 carbon atoms, an alkoxy group having 1 to 8 carbon atoms, an alkenyl group having 2 to 8 carbon atoms, or an alkenyloxy group having 2 to 8 carbon atoms, preferably having 2 to 8 carbon atoms. Alkyl groups 1 to 5, alkoxy groups having 1 to 5 carbon atoms, alkenyl groups having 2 to 5 carbon atoms or alkenyloxy groups having 2 to 5 carbon atoms are preferable, and alkyl groups having 1 to 5 carbon atoms or alkyl groups having 1 to 5 carbon atoms are preferable. An alkenyl group having 2 to 5 carbon atoms is more preferable, an alkyl group having 2 to 5 carbon atoms or an alkoxy group having 2 to 3 carbon atoms is further preferable, and an alkenyl group having 3 carbon atoms (propenyl group) is particularly preferable. .. A linear alkyl group having 1 to 5 carbon atoms, a linear alkoxy group having 1 to 4 carbon atoms, and a linear alkenyl group having 2 to 5 carbon atoms are preferable. In order to stabilize the nematic phase, the total of carbon atoms and oxygen atoms, if present, is preferably 5 or less, and is preferably linear.

Particularly preferred are methoxy and ethoxy groups.

n ^{Nd 11} is preferably 1 or 2, and preferably contains both a compound having ^{n Nd 11} of 1 and a compound having n ^{Nd 11 of 2.}

One or two compounds having n ^Nd11 of 1 can be used, but from the viewpoint of improving the lower limit temperature of the nematic phase, it is preferable to use two compounds, and when two compounds are used, ^RNd11 is used. It is preferable to use the same substituent.

One or two compounds having n ^Nd11 of 2 can be used, but from the viewpoint of improving the lower limit temperature of the nematic phase, it is preferable to use two compounds, and when two compounds are used, ^RNd12 is used. It is preferable to use the same substituent.

When both the compound having ^{n Nd11} of 1 and the compound having ^nNd11 being 2 are used, it is preferable to use more compounds having ^{nNd11 of 2.}

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

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

^{(Wherein, R N1101} and ^{R N1102} independently represents the same meaning as ^{R N11} and ^{R N12} in the general formula (N).)
^RN1101 is preferably an alkyl group having 1 to 5 carbon atoms or an alkenyl group having 2 to 5 carbon atoms, and preferably an ethyl group, a propyl group, a butyl group, a vinyl group or a 1-propenyl group. ^RN1102 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 preferably an ethoxy group, a propoxy group, or a butoxy group.

The compound represented by the general formula (N-1-10) can be used alone, or two or more compounds can be used in combination. The types of compounds that can be combined are not particularly limited, but they are appropriately combined and used according to the required performance such as solubility at low temperature, transition temperature, electrical reliability, and birefringence. The types of compounds used are, for example, one type, two types, three types, four types, and five or more types as one embodiment of the present invention.

It is preferable to set the content higher when the improvement of Δε is emphasized, the effect is higher when the content is set higher when the solubility at low temperature is emphasized, and the content is set _{when the TNI} is emphasized. The effect is high when is set high. Further, when improving the dripping marks and the seizure characteristics, it is preferable to set the content range in the middle.

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 composition of the present invention is 5%, 10%, 13% and 15%. It is 17% and 20%. The upper limit of the preferable content is 35%, 30%, 28%, 25%, 23%, 20%, and 18% with respect to the total amount of the composition of the present invention. %, 15%, 13%.

Further, the compound represented by the general formula (N-1-10) is a compound selected from the compound group represented by the formulas (N-1-10.1) to (N-1-10.21). It is preferably represented by the formulas (N-1-10.1) to (N-1-10.5), (N-1-10.20) and (N-1-10.21). It is preferably a compound, preferably of formula (N-1-10.1), formula (N-1-10.2), formula (N-1-10.20) and formula (N-1-10.21). The compound represented by the formula (N-1-10.1) and the compound represented by the formula (N-1-10.2) are preferable, and the compound represented by the formula (N-1-10.2) is preferable. Compounds are preferred.

The compounds represented by the formulas (N-1-10.1), (N-1-10.2), (N-1-10.20) and (N-1-10.21) are used alone. Although it can be used in combination or in combination, the lower limit of the preferable content of these compounds alone or in combination with respect to the total amount of the composition of the present invention is 3% and 5%. , 8%, 10%, 13%, 15%. The upper limit of the preferable content is 35%, 30%, 28%, 25%, 23%, 20%, and 18% with respect to the total amount of the composition of the present invention. %.

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

^{(Wherein, R N1111} and ^{R N1112} independently represents the same meaning as ^{R N11} and ^{R N12} in the general formula (N).)
^RN1111 is preferably an alkyl group having 1 to 5 carbon atoms or an alkenyl group having 2 to 5 carbon atoms, and preferably an ethyl group, a propyl group, a butyl group, a vinyl group or a 1-propenyl group. ^RN1112 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 preferably an ethoxy group, a propoxy group or a butoxy group.

The compound represented by the general formula (N-1-11) can be used alone, or two or more compounds can be used in combination. The types of compounds that can be combined are not particularly limited, but they are appropriately combined and used according to the required performance such as solubility at low temperature, transition temperature, electrical reliability, and birefringence. The types of compounds used are, for example, one type, two types, three types, four types, and five or more types as one embodiment of the present invention.

When the improvement of Δε is emphasized, it is preferable to set the content high, when the solubility at low temperature is emphasized, the content is set low, and _{when the TNI} is emphasized, the content is high. The effect is high when is set high. Further, when improving the dripping marks and the seizure characteristics, it is preferable to set the content range in the middle.

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

Further, the compound represented by the general formula (N-1-11) is a compound selected from the compound group represented by the formulas (N-1-11.1) to (N-1-1.14). It is preferably represented by the formulas (N-1-11.2), (N-1-11.4), (N-1-1.11) and (N-1-1.14). It is preferably a compound.

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

Formula (N-1-10.1), Formula (N-1-10.2), Formula (N-1-11.2), Formula (N-1-11.4), Formula (N-1- It is preferable to use 3 to 6 kinds of compounds selected from the compounds represented by 11.11) and the compound represented by the formula (N-1-1.14), and the formula (N-1-10.1) and the formula (N-). It is preferable to use a combination of compounds represented by 1-11.2) and formula (N-1-11.4), and formula (N-1-10.1) and formula (N-1-10.2). ), The combination of the compounds represented by the formulas (N-1-11.2) and (N-1-11.4) is preferable, and the formulas (N-1-10.2) and the formula (N-N-1-10.2) are used. It is preferable to use a combination of compounds represented by 1-11.11) and the formula (N-11.11.14).

As the compound represented by the general formula (N-1), only one kind may be used, but two or more kinds may be used. The compound represented by the general formula (N-1) corresponds to a dielectrically negative compound (the sign of Δε is negative and its absolute value is larger than 2).
The compound represented by the general formula (N-1) is the following compound.

^{(Wherein, R N11} and ^{R N12} are each independently an alkyl group having 1 to 8 carbon atoms, one or non-adjacent two or more -CH ₂ in the alkyl group - is independently It may be replaced by -CH = CH-, -C≡C-, -O-, -CO-, -COO- or -OCO-.
n ^N11 and n ^N12 represent 0, 1, 2 or 3, while n ^N11 + n ^N12 represent 1, 2 or 3.
Independently A ^N11 and ^{A N12,} respectively (a) 1,4-cyclohexylene group (this is present in the group one -CH ₂ - or nonadjacent two or more -CH ₂ - is -O (May be replaced with −) and (b) 1,4-phenylene group (one -CH = existing in this group or two or more -CH = not adjacent to each other is replaced with -N =. May be done.)
(C) Naphthalene-2,6-diyl group, 1,2,3,4-tetrahydronaphthalene-2,6-diyl group or decahydronaphthalene-2,6-diyl group (naphthalene-2,6-diyl group or One -CH = existing in the 1,2,3,4-tetrahydronaphthalene-2,6-diyl group or two or more non-adjacent -CH = may be replaced with -N =. )
Represents a group selected from the group consisting of, and the above groups (a), groups (b) and groups (c) are independently alkyl groups (one −CH ₂ − or adjacent to each other present in this group). Two or more -CH _2- that are not present may be replaced by -O-), an alkenyl group (one -CH _2- that is present in this group, or two or more -CHs that are not adjacent to each other. _2- may be replaced with −O−), may be substituted with a cyano group, a fluorine atom or a chlorine atom.
Z ^N11 and ^{Z N12} are each independently a single _{bond, -CH 2 CH 2 -, -} (CH 2) 4 -, - OCH 2 -, - CH 2 O -, - COO -, - OCO -, - OCF 2 Represents −, −CF ₂ O−, −CH = NN = CH−, −CH = CH−, −CF = CF− or −C≡C−.
If there are multiple A ^N11 and / or A ^N12 , they may be the same or different, ^{and if there are multiple Z N11} and / or Z ^N12 , they may be the same or different. However, the compound represented by the general formula (N-1) excludes the compound represented by the general formula (N-1d). )
The compound represented by the general formula (N-1) is preferably a compound having a negative Δε and an absolute value of more than 3.

In the general formula (N-1), ^RN11 and ^RN12 are independently an alkyl group having 1 to 8 carbon atoms, an alkoxy group having 1 to 8 carbon atoms, an alkenyl group having 2 to 8 carbon atoms, or an alkenyl group having 2 to 8 carbon atoms. An alkenyloxy group having 2 to 8 carbon atoms is preferable, an alkyl group having 1 to 5 carbon atoms, an alkoxy group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms, or an alkenyl group having 2 to 5 carbon atoms. Alkoxyoxy groups are preferable, alkyl groups having 1 to 5 carbon atoms or alkoxy groups having 2 to 5 carbon atoms are more preferable, and alkyl groups having 2 to 5 carbon atoms or alkoxy groups having 2 to 3 carbon atoms are further preferable. Preferably, an alkenyl group (propenyl group) having 3 carbon atoms is particularly preferable.

When the ring structure to which it is bonded is a phenyl group (aromatic), a linear alkyl group having 1 to 5 carbon atoms, a linear alkoxy group having 1 to 4 carbon atoms, and carbon. An alkoxy group having 4 to 5 atoms is preferable, and when the ring structure to which the alkoxy group is bonded is a saturated ring structure such as cyclohexane, pyran, or dioxane, a linear alkyl group having 1 to 5 carbon atoms or a linear chain is used. Alkoxy groups having 1 to 4 carbon atoms and linear alkenyl groups having 2 to 5 carbon atoms are preferable. In order to stabilize the nematic phase, the total of carbon atoms and oxygen atoms, if present, is preferably 5 or less, and is preferably linear.

The alkenyl group is preferably selected from the groups represented by any of the formulas (R1) to (R5). (The black dots in each equation represent carbon atoms in the ring structure.)

Preferably, it is an alkyl group having 1 to 5 carbon atoms and an alkoxy group having 1 to 5 carbon atoms, such as a methyl group, an ethyl group, a propyl group, a methoxy group, an ethoxy group and a propoxy group.

A ^N11 and ^AN12 are preferably aromatic when it is required to increase Δn independently, and are preferably aliphatic in order to improve the response rate, and trans-1,4. -Cyclohexylene group, 1,4-phenylene group, 2-fluoro-1,4-phenylene group, 3-fluoro-1,4-phenylene group, 3,5-difluoro-1,4-phenylene group, 2, 3-Difluoro-1,4-phenylene group, 1,4-cyclohexenylene group, 1,4-bicyclo [2.2.2] octylene group, piperidine-1,4-diyl group, naphthalene-2,6- It is preferable to represent a diyl group, a decahydronaphthalene-2,6-diyl group or a 1,2,3,4-tetrahydronaphthalene-2,6-diyl group, and more preferably to represent the following structure.

A trans-1,4-cyclohexylene group, a 1,4-cyclohexenylene group or a 1,4-phenylene group is preferable, and a trans-1,4-cyclohexylene group or a 1,4-phenylene group is more preferable.

Z ^N11 and ^{Z N12} are each _{independently -CH 2 O -, - CF 2} O -, - CH 2 CH 2 -, - CF 2 CF 2 - or preferably a single bond, _-CH 2 O-, -CH ₂ CH _2- or single bond is more preferred, and -CH ₂ O- or single bond is particularly preferred.

n ^N11 + n ^N12 is preferably 1 or 2, n ^N11 is 1 and n ^N12 is 0, n ^N11 is 2 and n ^N12 is 0, n ^N11 is 1 and n ^N12 is 1. A certain combination, a combination in which n ^N11 is 2 and n ^N12 is 1, is preferable.

However, compounds represented by the general formula (N-1d) are excluded.

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

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

When a composition having a low viscosity and a high response rate is required, it is preferable that the above lower limit value is low and the upper limit value is low. Further, when a composition having a high Tni of the composition of the present invention and good temperature stability is required, it is preferable that the above lower limit value is low and the upper limit value is low. Further, when it is desired to increase the dielectric anisotropy in order to keep the drive voltage low, it is preferable that the above lower limit value is high and the upper limit value is high.

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

^{(Wherein, R N11} and ^{R N12} are as defined ^{R N11} and ^{R N12} in the general formula ^{(N-1), n Na11} represents 0 or ^{1, n NB11} is 1 or ^{2, n NC11} is ^Represents 0 or 1, n Ne11 represents 1 or 2, n ^Nf11 represents 1 or 2, n ^{Ng 11} represents 1 or 2, A ^{Ne 11} represents a trans-1,4-cyclohexylene group or 1,4. ^{-Represents a} phenylene group, A Ng11 represents a trans-1,4-cyclohexylene group, a 1,4-cyclohexenylene group or a 1,4-phenylene group, but at least one is a 1,4-cyclohexenylene group. ^{Z Ne 11} represents a single bond or ethylene, but at least one represents ethylene.)
More specifically, the compound represented by the general formula (N-1) may be a compound selected from the compound group represented by the general formulas (N-1-1) to (N-1-21). preferable.

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

^{(Wherein, R N111} and ^{R N112} each independently represents the same meaning as ^{R N11} and ^{R N12} in the general formula (N).)
^RN111 is preferably an alkyl group having 1 to 5 carbon atoms or an alkenyl group having 2 to 5 carbon atoms, and preferably a propyl group, a pentyl group or a vinyl group. ^RN112 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 preferably an ethoxy group or a butoxy group.

The compound represented by the general formula (N-1-1) can be used alone, or two or more compounds can be used in combination. The types of compounds that can be combined are not particularly limited, but they are appropriately combined and used according to the required performance such as solubility at low temperature, transition temperature, electrical reliability, and birefringence. The types of compounds used are, for example, one type, two types, three types, four types, and five or more types as one embodiment of the present invention.

When the improvement of Δε is emphasized, it is preferable to set the content high, when the solubility at low temperature is emphasized, the effect is high when the content is set high, and _{when the TNI} is emphasized, the content is set high. The effect is high when set to a small value. Further, when improving the dripping marks and the seizure characteristics, it is preferable to set the content range in the middle.

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 composition of the present invention is 5%, 10%, 13% and 15%. , 17%, 20%, 23%, 25%, 27%, 30%, 33%, 35%. The upper limit of the preferable content is 50%, 40%, 38%, 35%, 33%, 30%, and 28% with respect to the total amount of the composition of the present invention. %, 25%, 23%, 20%, 18%, 15%, 13%, 10%, 8%, 7%, 6 %, 5%, and 3%.

Further, the compound represented by the general formula (N-1-1) is a compound selected from the compound group represented by the formulas (N-1-1.1) to (N1-1.23). It is preferable that the compound is represented by the formulas (N-1-1.1) to (N-1-1.4), and the formulas (N-1-1.1) and the formula (N-1-1.4) are preferable. The compound represented by -1-1.3) is preferable.

The compounds represented by the formulas (N-1-1.1) to (N1-1.22) can be used alone or in combination, but the composition of the present invention can be used. The lower limit of the preferred content of these compounds alone or of these compounds relative to the total amount is 5%, 10%, 13%, 15%, 17%, 20%, 23%. , 25%, 27%, 30%, 33%, 35%. The upper limit of the preferable content is 50%, 40%, 38%, 35%, 33%, 30%, and 28% with respect to the total amount of the composition of the present invention. %, 25%, 23%, 20%, 18%, 15%, 13%, 10%, 8%, 7%, 6 %, 5%, and 3%.

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

^{(Wherein, R N121} and ^{R N122} each independently represents the same meaning as ^{R N11} and ^{R N12} in the general formula (N).)
^RN121 is preferably an alkyl group having 1 to 5 carbon atoms or an alkenyl group having 2 to 5 carbon atoms, preferably an ethyl group, a propyl group, a butyl group or a pentyl group. The ^RN122 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 a methyl group, a propyl group, a methoxy group, an ethoxy group or a propoxy group. preferable.

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

It is preferable to set a higher content in the case of emphasizing improved [Delta] [epsilon], to emphasize the solubility at low temperature highly effective when fewer to set the content, when importance is attached to T _NI content The effect is high if you set a large amount. Further, when improving the dripping marks and the seizure characteristics, it is preferable to set the content range in the middle.

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 composition of the present invention is 5%, 7%, 10% and 13%. 15%, 17%, 20%, 23%, 25%, 27%, 30%, 33%, 35%, 37%. It is 40% and 42%. The preferred upper limit of the content is 50%, 48%, 45%, 43%, 40%, 38%, 35% with respect to the total amount of the composition of the present invention. %, 33%, 30%, 28%, 25%, 23%, 20%, 18%, 15%, 13%, 10 %, 8%, 7%, 6%, 5%.

Further, the compound represented by the general formula (N-1-2) is a compound selected from the compound group represented by the formulas (N-1-2.1) to (N-1-2.22). It is preferable that there are formulas (N-1-2.3) to formulas (N-1-2.7), formulas (N1-2.10), formulas (N-1-2.11), and formulas. It is preferable that the compound is represented by (N-1-2.13) and the formula (N1-2.20), and when the improvement of Δε is emphasized, the formula (N-1-2.3) is used. is preferably a compound represented by the formula (N-1-2.7) _from when emphasizing improvements in _{T NI} formula (N-1-2.10), formula (N-1-2.11) And the compound represented by the formula (N-1-2.13) is preferable, and the compound represented by the formula (N-1-2.20) is used when the improvement of the response speed is emphasized. Is preferable.

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

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

^{(Wherein, R N131} and ^{R N132} each independently represents the same meaning as ^{R N11} and ^{R N12} in the general formula (N).)
^RN131 is preferably an alkyl group having 1 to 5 carbon atoms or an alkenyl group having 2 to 5 carbon atoms, preferably an ethyl group, a propyl group or a butyl group. ^RN132 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 preferably a 1-propenyl group, an ethoxy group, a propoxy group or a butoxy group. ..

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

When the improvement of Δε is emphasized, it is preferable to set the content high, when the solubility at low temperature is emphasized, the effect is high when the content is set high, and _{when the TNI} is emphasized, the content is set high. The effect is high when is set to a large extent. Further, when improving the dripping marks and the seizure characteristics, it is preferable to set the content range in the middle.

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 composition of the present invention is 5%, 10%, 13% and 15%. It is 17% and 20%. The upper limit of the preferable content is 35%, 30%, 28%, 25%, 23%, 20%, and 18% with respect to the total amount of the composition of the present invention. %, 15%, 13%.

Further, the compound represented by the general formula (N-1--3) is a compound selected from the compound group represented by the formulas (N-1-3.21) to (N-1-3.21). It is preferable that the compound is represented by the formulas (N-1-3.1) to (N-1-3.7) and (N-1-3.21), and is preferably the compound represented by the formula (N-1-3.21). -1-3.1), Eq. (N-1-3.2), Eq. (N-1-3.3), Eq. (N-1-3.4) and Eq. (N-1-3.6) ) Is preferable.

The compounds represented by the formulas (N-1-3.1) to (N-1-3.4), the formula (N-1-3.6) and the formula (N-1-3.21) are independent. It can be used in the above or in combination, but it is a combination of the formulas (N-1-3.1) and (N-1-3.2) and the formula (N-1-3.3). ), Formula (N-1-3.4) and formula (N-1-3.6), 2 or 3 combinations are preferred. The lower limit of the preferred content of the composition alone or of these compounds relative to the total amount of the compositions of the present invention is 5%, 10%, 13%, 15%, 17%, 20. %. The upper limit of the preferable content is 35%, 30%, 28%, 25%, 23%, 20%, and 18% with respect to the total amount of the composition of the present invention. %, 15%, 13%.

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

^{(Wherein, R N141} and ^{R N142} each independently represents the same meaning as ^{R N11} and ^{R N12} in the general formula (N).)
Independently R ^N141 and ^{R N142} are each an alkyl group having 1 to 5 carbon atoms, preferably an alkenyl group or an alkoxy group having 1 to 4 carbon atoms carbon atoms 4-5, methyl group, propyl group, ethoxy Groups or butoxy groups are preferred.

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

When the improvement of Δε is emphasized, it is preferable to set the content high, when the solubility at low temperature is emphasized, the effect is high when the content is set high, and _{when the TNI} is emphasized, the content is set high. The effect is high when set to a small value. Further, when improving the dripping marks and the seizure characteristics, it is preferable to set the content range in the middle.

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 composition of the present invention is 3%, 5%, 7% and 10%. It is 13%, it is 15%, it is 17%, and it is 20%. The upper limit of the preferable content is 35%, 30%, 28%, 25%, 23%, 20%, and 18% with respect to the total amount of the composition of the present invention. %, 15%, 13%, 11%, 10%, 8%.

Further, the compound represented by the general formula (N-1--4) is a compound selected from the compound group represented by the formulas (N-1-4.1) to (N-1-4.14). It is preferable that the compound is represented by the formulas (N-1-4.1) to (N-1-4.4), and the compounds are preferably of the formulas (N-1-4.1) and (N-1-4.4). The compounds represented by -1-4.2) and the formula (N-1-4.4) are preferable.

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

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

^{(Wherein, R N151} and ^{R N152} each independently represents the same meaning as ^{R N11} and ^{R N12} in the general formula (N).)
^RN151 and ^RN152 are 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, preferably an ethyl group, a propyl group, or a butyl group. Is preferable.

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

It is preferable to set a higher content in the case of emphasizing improved [Delta] [epsilon], to emphasize the solubility at low temperature highly effective when fewer to set the content, when importance is attached to T _NI content The effect is high if you set a large amount. Further, when improving the dripping marks and the seizure characteristics, it is preferable to set the content range in the middle.

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 composition of the present invention is 5%, 8%, 10% and 13%. , 15%, 17%, and 20%. The preferred upper limit of the content is 35%, 33%, 30%, 28%, 25%, 23%, 20% with respect to the total amount of the composition of the present invention. %, 18%, 15%, 13%.

Further, the compound represented by the general formula (N-1-5) is a compound selected from the compound group represented by the formulas (N-1-5.1) to (N-1-5.6). It is preferable that the compound is represented by the formula (N-1-5.1), the formula (N-1-5.2) and the formula (N-1-5.4).

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

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

^{(Wherein, R N1121} and ^{R N1122} independently represents the same meaning as ^{R N11} and ^{R N12} in the general formula (N).)
^RN1121 is preferably an alkyl group having 1 to 5 carbon atoms or an alkenyl group having 2 to 5 carbon atoms, preferably an ethyl group, a propyl group or a butyl group. ^RN1122 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 preferably an ethoxy group, a propoxy group or a butoxy group.

The compound represented by the general formula (N-1-12) can be used alone, or two or more compounds can be used in combination. The types of compounds that can be combined are not particularly limited, but they are appropriately combined and used according to the required performance such as solubility at low temperature, transition temperature, electrical reliability, and birefringence. The types of compounds used are, for example, one type, two types, three types, four types, and five or more types as one embodiment of the present invention.

When the improvement of Δε is emphasized, it is preferable to set the content high, when the solubility at low temperature is emphasized, the effect is high when the content is set high, and _{when the TNI} is emphasized, the content is set high. The effect is high when is set to a large extent. Further, when improving the dripping marks and the seizure characteristics, it is preferable to set the content range in the middle.

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 composition of the present invention is 5%, 10%, 13% and 15%. It is 17% and 20%. The upper limit of the preferable content is 35%, 30%, 28%, 25%, 23%, 20%, and 18% with respect to the total amount of the composition of the present invention. %, 15%, 13%.

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

^{(Wherein, R N1131} and ^{R N1132} independently represents the same meaning as ^{R N11} and ^{R N12} in the general formula (N).)
^RN1131 is preferably an alkyl group having 1 to 5 carbon atoms or an alkenyl group having 2 to 5 carbon atoms, preferably an ethyl group, a propyl group or a butyl group. ^RN1132 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 preferably an ethoxy group, a propoxy group, or a butoxy group.

The compound represented by the general formula (N-1-13) can be used alone, or two or more compounds can be used in combination. The types of compounds that can be combined are not particularly limited, but they are appropriately combined and used according to the required performance such as solubility at low temperature, transition temperature, electrical reliability, and birefringence. The types of compounds used are, for example, one type, two types, three types, four types, and five or more types as one embodiment of the present invention.

When the improvement of Δε is emphasized, it is preferable to set the content high, when the solubility at low temperature is emphasized, the effect is high when the content is set high, and _{when the TNI} is emphasized, the content is set high. The effect is high when is set to a large extent. Further, when improving the dripping marks and the seizure characteristics, it is preferable to set the content range in the middle.

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 composition of the present invention is 5%, 10%, 13% and 15%. It is 17% and 20%. The upper limit of the preferable content is 35%, 30%, 28%, 25%, 23%, 20%, and 18% with respect to the total amount of the composition of the present invention. %, 15%, 13%.

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

^{(Wherein, R N1141} and ^{R N1142} independently represents the same meaning as ^{R N11} and ^{R N12} in the general formula (N).)
^RN1141 is preferably an alkyl group having 1 to 5 carbon atoms or an alkenyl group having 2 to 5 carbon atoms, preferably an ethyl group, a propyl group or a butyl group. ^RN1142 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 preferably an ethoxy group, a propoxy group or a butoxy group.

The compound represented by the general formula (N-1-14) can be used alone, or two or more compounds can be used in combination. The types of compounds that can be combined are not particularly limited, but they are appropriately combined and used according to the required performance such as solubility at low temperature, transition temperature, electrical reliability, and birefringence. The types of compounds used are, for example, one type, two types, three types, four types, and five or more types as one embodiment of the present invention.

When the improvement of Δε is emphasized, it is preferable to set the content high, when the solubility at low temperature is emphasized, the effect is high when the content is set high, and _{when the TNI} is emphasized, the content is set high. The effect is high when is set to a large extent. Further, when improving the dripping marks and the seizure characteristics, it is preferable to set the content range in the middle.

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 composition of the present invention is 5%, 10%, 13% and 15%. It is 17% and 20%. The upper limit of the preferable content is 35%, 30%, 28%, 25%, 23%, 20%, and 18% with respect to the total amount of the composition of the present invention. %, 15%, 13%.

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

^{(Wherein, R N1151} and ^{R N1152} independently represents the same meaning as ^{R N11} and ^{R N12} in the general formula (N).)
^RN1151 is preferably an alkyl group having 1 to 5 carbon atoms or an alkenyl group having 2 to 5 carbon atoms, preferably an ethyl group, a propyl group or a butyl group. ^RN1152 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 preferably an ethoxy group, a propoxy group, or a butoxy group.

The compound represented by the general formula (N-1-15) can be used alone, or two or more compounds can be used in combination. The types of compounds that can be combined are not particularly limited, but they are appropriately combined and used according to the required performance such as solubility at low temperature, transition temperature, electrical reliability, and birefringence. The types of compounds used are, for example, one type, two types, three types, four types, and five or more types as one embodiment of the present invention.

When the improvement of Δε is emphasized, it is preferable to set the content high, when the solubility at low temperature is emphasized, the effect is high when the content is set high, and _{when the TNI} is emphasized, the content is set high. The effect is high when is set to a large extent. Further, when improving the dripping marks and the seizure characteristics, it is preferable to set the content range in the middle.

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 composition of the present invention is 5%, 10%, 13% and 15%. It is 17% and 20%. The upper limit of the preferable content is 35%, 30%, 28%, 25%, 23%, 20%, and 18% with respect to the total amount of the composition of the present invention. %, 15%, 13%.

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

^{(Wherein, R N1161} and ^{R N1162} independently represents the same meaning as ^{R N11} and ^{R N12} in the general formula (N).)
^RN1161 is preferably an alkyl group having 1 to 5 carbon atoms or an alkenyl group having 2 to 5 carbon atoms, preferably an ethyl group, a propyl group or a butyl group. ^RN1162 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 preferably an ethoxy group, a propoxy group, or a butoxy group.

The compound represented by the general formula (N-1-16) can be used alone, or two or more compounds can be used in combination. The types of compounds that can be combined are not particularly limited, but they are appropriately combined and used according to the required performance such as solubility at low temperature, transition temperature, electrical reliability, and birefringence. The types of compounds used are, for example, one type, two types, three types, four types, and five or more types as one embodiment of the present invention.

When the improvement of Δε is emphasized, it is preferable to set the content high, when the solubility at low temperature is emphasized, the effect is high when the content is set high, and _{when the TNI} is emphasized, the content is set high. The effect is high when is set to a large extent. Further, when improving the dripping marks and the seizure characteristics, it is preferable to set the content range in the middle.

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 composition of the present invention is 5%, 10%, 13% and 15%. It is 17% and 20%. The upper limit of the preferable content is 35%, 30%, 28%, 25%, 23%, 20%, and 18% with respect to the total amount of the composition of the present invention. %, 15%, 13%.

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

^{(Wherein, R N1171} and ^{R N1172} independently represents the same meaning as ^{R N11} and ^{R N12} in the general formula (N).)
^RN1171 is preferably an alkyl group having 1 to 5 carbon atoms or an alkenyl group having 2 to 5 carbon atoms, preferably an ethyl group, a propyl group or a butyl group. ^RN1172 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 preferably an ethoxy group, a propoxy group or a butoxy group.

The compound represented by the general formula (N-1-17) can be used alone, or two or more compounds can be used in combination. The types of compounds that can be combined are not particularly limited, but they are appropriately combined and used according to the required performance such as solubility at low temperature, transition temperature, electrical reliability, and birefringence. The types of compounds used are, for example, one type, two types, three types, four types, and five or more types as one embodiment of the present invention.

When the improvement of Δε is emphasized, it is preferable to set the content high, when the solubility at low temperature is emphasized, the effect is high when the content is set high, and _{when the TNI} is emphasized, the content is set high. The effect is high when is set to a large extent. Further, when improving the dripping marks and the seizure characteristics, it is preferable to set the content range in the middle.

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 composition of the present invention is 5%, 10%, 13% and 15%. It is 17% and 20%. The upper limit of the preferable content is 35%, 30%, 28%, 25%, 23%, 20%, and 18% with respect to the total amount of the composition of the present invention. %, 15%, 13%.

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

^{(Wherein, R N1181} and ^{R N1182} independently represents the same meaning as ^{R N11} and ^{R N12} in the general formula (N).)
^RN1181 is preferably an alkyl group having 1 to 5 carbon atoms or an alkenyl group having 2 to 5 carbon atoms, preferably a methyl group, an ethyl group, a propyl group or a butyl group. ^RN1182 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 preferably an ethoxy group, a propoxy group or a butoxy group.

The compound represented by the general formula (N-1-18) can be used alone, or two or more compounds can be used in combination. The types of compounds that can be combined are not particularly limited, but they are appropriately combined and used according to the required performance such as solubility at low temperature, transition temperature, electrical reliability, and birefringence. The types of compounds used are, for example, one type, two types, three types, four types, and five or more types as one embodiment of the present invention.

When the improvement of Δε is emphasized, it is preferable to set the content high, when the solubility at low temperature is emphasized, the effect is high when the content is set high, and _{when the TNI} is emphasized, the content is set high. The effect is high when is set to a large extent. Further, when improving the dripping marks and the seizure characteristics, it is preferable to set the content range in the middle.

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 composition of the present invention is 5%, 10%, 13% and 15%. It is 17% and 20%. The upper limit of the preferable content is 35%, 30%, 28%, 25%, 23%, 20%, and 18% with respect to the total amount of the composition of the present invention. %, 15%, 13%.

Further, the compound represented by the general formula (N-1-18) is a compound selected from the compound group represented by the formulas (N-1-18.1) to (N-1-18.5). It is preferable that the compound is represented by the formulas (N-1-18.1) to (N-1-11.3), and the compounds are preferably represented by the formulas (N-1-18.2) and (N-1-11. The compound represented by -1-18.3) is preferable.

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

^{(Wherein, R N1201} and ^{R N1202} independently represents the same meaning as ^{R N11} and ^{R N12} in the general formula (N).)
^RN1201 and ^RN1202 are each independently preferably an alkyl group having 1 to 5 carbon atoms or an alkenyl group having 2 to 5 carbon atoms, preferably an ethyl group, a propyl group or a butyl group.

The compound represented by the general formula (N-1-20) can be used alone, or two or more compounds can be used in combination. The types of compounds that can be combined are not particularly limited, but they are appropriately combined and used according to the required performance such as solubility at low temperature, transition temperature, electrical reliability, and birefringence. The types of compounds used are, for example, one type, two types, three types, four types, and five or more types as one embodiment of the present invention.

When the improvement of Δε is emphasized, it is preferable to set the content high, when the solubility at low temperature is emphasized, the effect is high when the content is set high, and _{when the TNI} is emphasized, the content is set high. The effect is high when is set to a large extent. Further, when improving the dripping marks and the seizure characteristics, it is preferable to set the content range in the middle.

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 composition of the present invention is 5%, 10%, 13% and 15%. It is 17% and 20%. The upper limit of the preferable content is 35%, 30%, 28%, 25%, 23%, 20%, and 18% with respect to the total amount of the composition of the present invention. %, 15%, 13%.

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

^{(Wherein, R N1211} and ^{R N1212} independently represents the same meaning as ^{R N11} and ^{R N12} in the general formula (N).)
^RN1211 and ^RN1212 are each independently preferably an alkyl group having 1 to 5 carbon atoms or an alkenyl group having 2 to 5 carbon atoms, preferably an ethyl group, a propyl group or a butyl group.

The compound represented by the general formula (N-1-21) can be used alone, or two or more compounds can be used in combination. The types of compounds that can be combined are not particularly limited, but they are appropriately combined and used according to the required performance such as solubility at low temperature, transition temperature, electrical reliability, and birefringence. The types of compounds used are, for example, one type, two types, three types, four types, and five or more types as one embodiment of the present invention.

When the improvement of Δε is emphasized, it is preferable to set the content high, when the solubility at low temperature is emphasized, the effect is high when the content is set high, and _{when the TNI} is emphasized, the content is set high. The effect is high when is set to a large extent. Further, when improving the dripping marks and the seizure characteristics, it is preferable to set the content range in the middle.

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 composition of the present invention is 5%, 10%, 13% and 15%. It is 17% and 20%. The upper limit of the preferable content is 35%, 30%, 28%, 25%, 23%, 20%, and 18% with respect to the total amount of the composition of the present invention. %, 15%, 13%.

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

^{(Wherein, R N1221} and ^{R N1222} independently represents the same meaning as ^{R N11} and ^{R N12} in the general formula (N).)
^RN1221 and ^RN1222 are each independently preferably an alkyl group having 1 to 5 carbon atoms or an alkenyl group having 2 to 5 carbon atoms, preferably an ethyl group, a propyl group or a butyl group.

The compound represented by the general formula (N-1-22) can be used alone, or two or more compounds can be used in combination. The types of compounds that can be combined are not particularly limited, but they are appropriately combined and used according to the required performance such as solubility at low temperature, transition temperature, electrical reliability, and birefringence. The types of compounds used are, for example, one type, two types, three types, four types, and five or more types as one embodiment of the present invention.

When the improvement of Δε is emphasized, it is preferable to set the content high, when the solubility at low temperature is emphasized, the effect is high when the content is set high, and _{when the TNI} is emphasized, the content is set high. The effect is high when is set to a large extent. Further, when improving the dripping marks and the seizure characteristics, it is preferable to set the content range in the middle.

The lower limit of the preferable content of the compound represented by the formula (N-2-1) with respect to the total amount of the composition of the present invention is 1%, 5%, 10% and 13%. , 15%, 17%, and 20%. The upper limit of the preferable content is 35%, 30%, 28%, 25%, 23%, 20%, and 18% with respect to the total amount of the composition of the present invention. %, 15%, 13%, 10%, 5%.

Further, the compound represented by the general formula (N-1-22) is a compound selected from the compound group represented by the formulas (N-1-22.1) to (N-1-2.12.2). It is preferable that the compound is represented by the formulas (N-1-22.1) to (N-1-22.5), and the compounds are preferably represented by the formulas (N-1-22.1) to (N-). The compound represented by 1-22.4) is preferable.

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

However, the compounds represented by the general formula (i), the general formula (N-1d) and the general formula (N-1) are excluded.

The compound represented by the general formula (L) may be used alone or in combination. The types of compounds that can be combined are not particularly limited, but they are appropriately combined and used according to desired performance such as solubility at low temperature, transition temperature, electrical reliability, and birefringence. The type of compound used is, for example, one type as one embodiment of the present invention. Alternatively, in another embodiment of the present invention, there are two types, three types, four types, five types, six types, seven types, eight types, nine types, and ten. More than a kind.

In the composition of the present invention, the content of the compound represented by the general formula (L) includes solubility at low temperature, transition temperature, electrical reliability, birefringence, process compatibility, dripping marks, seizure, and the like. It is necessary to make appropriate adjustments according to the required performance such as dielectric anisotropy.

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

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

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

When a composition having a low viscosity and a high response rate is required, it is preferable that the above lower limit value is high and the upper limit value is high. Further, when a composition having a high Tni of the composition of the present invention and good temperature stability is required, it is preferable that the above lower limit value is high and the upper limit value is high. Further, when it is desired to increase the dielectric anisotropy in order to keep the drive voltage low, it is preferable that the above lower limit value is low and the upper limit value is low.

When reliability is important, ^{both RL1} and ^RL2 are preferably alkyl groups, and when reducing the volatility of the compound is important, they are preferably alkoxy groups, and reduction of viscosity is important. It is preferable that at least one of them is an alkenyl group.

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

^RL1 and ^RL2 are linear alkyl groups having 1 to 5 carbon atoms and linear carbon atoms 1 to 4 when the ring structure to which they are bonded is a phenyl group (aromatic). The alkoxy group and the alkenyl group having 4 to 5 carbon atoms are preferable, and when the ring structure to which the alkoxy group is bonded is a saturated ring structure such as cyclohexane, pyran and dioxane, the linear carbon atom number is 1 to 5. Alkyl groups, linear alkoxy groups having 1 to 4 carbon atoms and linear alkenyl groups having 2 to 5 carbon atoms are preferable. In order to stabilize the nematic phase, the total of carbon atoms and oxygen atoms, if present, is preferably 5 or less, and is preferably linear.

The alkenyl group is preferably selected from the groups represented by any of the formulas (R1) to (R5). (The black dots in each equation represent carbon atoms in the ring structure.)

n ^L1 is preferably 0 when the response speed is important, 2 or 3 is preferable for improving the upper limit temperature of the nematic phase, and 1 is preferable for balancing these. Further, in order to satisfy the properties required for the composition, it is preferable to combine compounds having different values.

Preferably A ^L1, A ^L2, and A ^L3 if it is required to increase the Δn is aromatic, preferably to improve the response speed is an aliphatic, independently trans - 1,4-Cyclohexylene group, 1,4-phenylene group, 2-fluoro-1,4-phenylene group, 3-fluoro-1,4-phenylene group, 3,5-difluoro-1,4-phenylene group , 1,4-Cyclohexenylene group, 1,4-bicyclo [2.2.2] octylene group, piperidine-1,4-diyl group, naphthalene-2,6-diyl group, decahydronaphthalene-2,6 It preferably represents a −diyl group or 1,2,3,4-tetrahydronaphthalene-2,6-diyl group, more preferably the following structure.

It is more preferable to represent a trans-1,4-cyclohexylene group or a 1,4-phenylene group.

Z ^L1 and Z ^L2 are preferably single-bonded when the response speed is important.

The compound represented by the general formula (L) preferably has 0 or 1 halogen atoms in the molecule.

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

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

^{(Wherein, R L11} and ^{R L12} are each independently the same meaning as ^{R L1} and ^{R L2} in Formula (L).)
^RL11 and ^RL12 are preferably a linear alkyl group having 1 to 5 carbon atoms, a linear alkoxy group having 1 to 4 carbon atoms, and a linear alkenyl group having 2 to 5 carbon atoms. ..

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

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

When a composition having a low viscosity and a high response rate is required, it is preferable that the above lower limit value is high and the upper limit value is high. Further, when a composition having a high Tni of the composition of the present invention and good temperature stability is required, it is preferable that the above lower limit value is moderate and the upper limit value is moderate. Further, when it is desired to increase the dielectric anisotropy in order to keep the drive voltage low, it is preferable that the above lower limit value is low and the upper limit value is low. It is not preferable to increase the upper limit value in order to improve the viewing angle characteristics.

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

(In the formula, ^RL12 has the same meaning as in the general formula (L-1).)
The compound represented by the general formula (L-1-1) is a compound selected from the compound group represented by the formulas (L-1-1.1) to (L-1-1.3). Is preferable, and the compound is preferably represented by the formula (L-1-1.2) or the formula (L-1-1.3), and in particular, the compound is represented by the formula (L-1-1.3). It is preferably a compound.

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 composition of the present invention is 1%, 2% and 3%. It is 5%, 7%, and 10%. The upper limit of the preferable content is 20%, 15%, 13%, 10%, 8%, 7%, and 6% with respect to the total amount of the composition of the present invention. %, 5%, and 3%.

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

(In the formula, ^RL12 has 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 composition of the present invention is 1%, 5%, 10% and 15%. , 17%, 20%, 23%, 25%, 27%, 30%, 35%. The preferred upper limit of the content is 60%, 55%, 50%, 45%, 42%, 40%, 38, based on the total amount of the composition of the present invention. %, 35%, 33%, 30%.

Further, the compound represented by the general formula (L-1-2) is a compound selected from the compound group represented by the formulas (L-1-2.1) to (L-1-2.4). It is preferable that the compound is represented by the formulas (L-1-2.2) to (L-1-2.4). In particular, the compound represented by the formula (L-1-2.2) is preferable because it particularly improves the response rate of the composition of the present invention. Further, when obtaining Tni higher than the response speed, it is preferable to use a compound represented by the formula (L-1-2.3) or the formula (L-1-2.4). The content of the compounds represented by the formulas (L-1-2.3) and (L-1-2.4) is not preferably 30% or more in order to improve the solubility at a low temperature.

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 composition of the present invention is 10%, 15%, and 18%. 20%, 23%, 25%, 27%, 30%, 33%, 35%, 38%, 40%. The preferred upper limit of the content is 60%, 55%, 50%, 45%, 43%, 40%, 38, based on the total amount of the composition of the present invention. %, 35%, 32%, 30%, 27%, 25%, 22%.

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

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

(In the formula, ^RL13 and ^RL14 independently represent an alkyl group having 1 to 8 carbon atoms or an alkoxy group having 1 to 8 carbon atoms.)
^RL13 and ^RL14 are preferably a linear alkyl group having 1 to 5 carbon atoms, a linear alkoxy group having 1 to 4 carbon atoms, and a linear alkenyl group having 2 to 5 carbon atoms. ..

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 composition of the present invention is 1%, 5%, 10% and 13%. , 15%, 17%, 20%, 23%, 25%, and 30%. The preferred upper limit of the content is 60%, 55%, 50%, 45%, 40%, 37%, 35% with respect to the total amount of the composition of the present invention. %, 33%, 30%, 27%, 25%, 23%, 20%, 17%, 15%, 13%, 10 %.
Further, the compound represented by the general formula (L-1--3) is a compound selected from the compound group represented by the formulas (L-1-3.1) to (L-1-3.12). It is preferable that the compound is represented by the formula (L-1-3.1), the formula (L-1-3.3) or the formula (L-1-3.4). In particular, the compound represented by the formula (L-1-3.1) is preferable because it particularly improves the response rate of the composition of the present invention. Further, when obtaining Tni higher than the response speed, the formula (L-1-3.3), the formula (L-1-3.4), the formula (L-1-3.11) and the formula (L-) are obtained. It is preferable to use the compound represented by 1-3.12). Total of compounds represented by formula (L-1-3.3), formula (L-1-3.4), formula (L-1-3.11) and formula (L-1-3.12). The content of is not preferably 20% or more in order to improve the solubility at low temperature.

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 composition of the present invention is 1%, 2% and 3%. 5%, 7%, 10%, 13%, 15%, 18%, 20%. The preferred upper limit of the content is 20%, 17%, 15%, 13%, 10%, 8%, and 7% with respect to the total amount of the composition of the present invention. % And 6%.

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

(In the formula, ^RL15 and ^RL16 independently represent an alkyl group having 1 to 8 carbon atoms or an alkoxy group having 1 to 8 carbon atoms.)
^RL15 and ^RL16 are preferably a linear alkyl group having 1 to 5 carbon atoms, a linear alkoxy group having 1 to 4 carbon atoms, and a linear alkenyl group having 2 to 5 carbon atoms. ..

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 composition of the present invention is 1%, 5%, 10% and 13%. , 15%, 17%, and 20%. The preferred upper limit of the content is 25%, 23%, 20%, 17%, 15%, 13%, and 10% with respect to the total amount of the composition of the present invention. %.

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 composition of the present invention is 1%, 5%, 10% and 13%. , 15%, 17%, and 20%. The preferred upper limit of the content is 25%, 23%, 20%, 17%, 15%, 13%, and 10% with respect to the total amount of the composition of the present invention. %.

Further, the compounds represented by the general formulas (L-1-4) and (L-1-5) are represented by the formulas (L-1-5.3) from the formulas (L-1-4.1). It is preferable that the compound is selected from the above-mentioned compound group, and the compound represented by the formula (L-1-4.2) or the formula (L-1-5.2) is preferable.

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 composition of the present invention is 1%, 2% and 3%. 5%, 7%, 10%, 13%, 15%, 18%, 20%. The preferred upper limit of the content is 20%, 17%, 15%, 13%, 10%, 8%, and 7% with respect to the total amount of the composition of the present invention. % And 6%.

Equation (L-1-1.3), Equation (L-1-2.2), Equation (L-1-3.1), Equation (L-1-3.3), Equation (L-1- It is preferable to combine two or more compounds selected from the compounds represented by 3.4), the formula (L-1-3.11) and the formula (L-1-3.12), and the formula (L-1). -1.3), formula (L-1-2.2), formula (L-1-3.1), formula (L-1-3.3), formula (L-1-3.4) and It is preferable to combine two or more compounds selected from the compounds represented by the formula (L-1-4.2), and the lower limit of the preferable content of the total content of these compounds is the composition of the present invention. 1%, 2%, 3%, 5%, 7%, 10%, 13%, 15%, 18%, etc. , 20%, 23%, 25%, 27%, 30%, 33%, 35%, and the upper limit is relative to the total amount of the composition of the present invention. , 80%, 70%, 60%, 50%, 45%, 40%, 37%, 35%, 33%, 30%. , 28%, 25%, 23%, 20%. When the reliability of the composition is emphasized, the compounds represented by the formulas (L-1-3.1), (L-1-3.3) and (L-1-3.4)) are used. It is preferable to combine two or more compounds selected from the above, and when the response speed of the composition is important, it is represented by the formulas (L-1-1.3) and (L-1-2.2). It is preferable to combine two or more compounds selected from the above compounds.
The compound represented by the general formula (L-1) is preferably a compound selected from the compound group represented by the general formula (L-1-6).

(In the formula, ^RL17 and ^RL18 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 composition of the present invention is 1%, 5%, 10% and 15%. , 17%, 20%, 23%, 25%, 27%, 30%, 35%. The preferred upper limit of the content is 60%, 55%, 50%, 45%, 42%, 40%, 38, based on the total amount of the composition of the present invention. %, 35%, 33%, 30%.

Further, the compound represented by the general formula (L-1-6) is a compound selected from the compound group represented by the formulas (L-1-6.1) to (L-1-6.3). It is preferable to have.

To ensure a balance between response speed and reliability, the compounds represented by the general formula (L-1) are (L-1-1), (L-1-2) and / or (L-1-). Is preferable, and (L-1-2) and / or (L-1--3) are particularly preferable.

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

^{(Wherein, R L21} and ^{R L22} are each independently the same meaning as ^{R L1} and ^{R L2} in Formula (L).)
^RL21 is preferably an alkyl group having 1 to 5 carbon atoms or an alkenyl group having 2 to 5 carbon atoms, and ^RL22 is an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 4 to 5 carbon atoms or a carbon atom. Alkoxy groups of numbers 1 to 4 are preferable.

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

When the solubility at low temperature is emphasized, the effect is high when the content is set high, and conversely, when the response speed is emphasized, the effect is high when the content is set low. Further, when improving the dripping marks and the seizure characteristics, it is preferable to set the content range in the middle.

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

Further, the compound represented by the general formula (L-2) is preferably a compound selected from the compound group represented by the formulas (L-2.1) to (L-2.6), preferably the formula. It is preferable that the compound is selected from the compound group represented by (L-2.1), formula (L-2.3), formula (L-2.4) and formula (L-2.6). It is preferable that the compound is selected from the compound group represented by the formula (L-2.3) and the formula (L-2.4).

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

^{(Wherein, R L31} and ^{R L32} are each independently the same meaning as ^{R L1} and ^{R L2} in Formula (L).)
^RL31 and ^RL32 are preferably alkyl groups having 1 to 5 carbon atoms, alkenyl groups having 4 to 5 carbon atoms, or alkoxy groups having 1 to 4 carbon atoms, respectively.

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

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

When obtaining a high birefringence, setting a large content is highly effective, and conversely, when emphasizing a high Tni, setting a low content is highly effective. Further, when improving the dripping marks and the seizure characteristics, it is preferable to set the content range in the middle.

Further, the compound represented by the general formula (L-3) is preferably a compound selected from the compound group represented by the formulas (L-3.1) to (L-3.6), preferably the formula. It is preferable that the compound is selected from the compound group represented by (L-3.1), formula (L-3.3), formula (L-3.5) or formula (L-3.6). It is preferably a compound represented by the formula (L-3.1).

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

^{(Wherein, R L41} and ^{R L42} are each independently the same meaning as ^{R L1} and ^{R L2} in Formula (L).)
^RL41 is preferably an alkyl group having 1 to 5 carbon atoms or an alkenyl group having 2 to 5 carbon atoms, and ^RL42 is an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 4 to 5 carbon atoms or a carbon atom. Alkoxy groups of numbers 1 to 4 are preferable. )
The compound represented by the general formula (L-4) can be used alone, or two or more compounds can be used in combination. The types of compounds that can be combined are not particularly limited, but they are appropriately combined and used according to the required performance such as solubility at low temperature, transition temperature, electrical reliability, and birefringence. The types of compounds used are, for example, one type, two types, three types, four types, and five or more types as one embodiment of the present invention.

In the composition of the present invention, the content of the compound represented by the general formula (L-4) includes solubility at low temperature, transition temperature, electrical reliability, birefringence, process compatibility, dropping marks, and the like. It is necessary to make appropriate adjustments according to the required performance such as seizure and dielectric anisotropy.

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

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

Depending on the required performance such as solubility at low temperature, transition temperature, electrical reliability, birefringence, etc., even if the compound represented by the formula (L-4.1) is contained, the formula (L) is contained. Even if it contains the compound represented by 4.2), it contains both the compound represented by the formula (L-4.1) and the compound represented by the formula (L-4.2). It may contain all the compounds represented by the formulas (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 composition of the present invention is 3%, which is 5%. Yes, 7%, 9%, 11%, 12%, 13%, 18%, 21%, and preferred upper limits are 45, 40%. , 35%, 30%, 25%, 23%, 20%, 18%, 15%, 13%, 10%, 8%. ..

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

The compound represented by the general formula (L-4) is preferably a compound represented by the formulas (L-4.4) to (L-4.6), for example, preferably the compound represented by the formula (L-4.4). ) Is preferable.

Depending on the required performance such as solubility at low temperature, transition temperature, electrical reliability, birefringence, etc., even if the compound represented by the formula (L-4.4) is contained, the formula (L) Even if it contains the compound represented by −4.5), it contains both the compound represented by the formula (L-4.4) and the compound represented by the formula (L-4.5). You may be.

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 composition of the present invention is 3%, which is 5%. Yes, 7%, 9%, 11%, 12%, 13%, 18%, 21%. Preferred upper limits are 45, 40%, 35%, 30%, 25%, 23%, 20%, 18%, 15%, 13 %, 10%, 8%.

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

The compound represented by the general formula (L-4) is preferably a compound represented by the formulas (L-4.7) to (L-4.10), and in particular, the compound represented by the formula (L-4. The compound represented by 9) is preferable.

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

^{(Wherein, R L51} and ^{R L52} are each independently the same meaning as ^{R L1} and ^{R L2} in Formula (L).)
^RL51 is preferably an alkyl group having 1 to 5 carbon atoms or an alkenyl group having 2 to 5 carbon atoms, and ^RL52 is an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 4 to 5 carbon atoms or a carbon atom. Alkoxy groups of numbers 1 to 4 are preferable.

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

In the composition of the present invention, the content of the compound represented by the general formula (L-5) includes solubility at low temperature, transition temperature, electrical reliability, birefringence, process compatibility, dropping marks, and the like. It is necessary to make appropriate adjustments according to the required performance such as seizure and dielectric anisotropy.

The lower limit of the preferable content of the compound represented by the formula (L-5) with respect to the total amount of the composition of the present invention is 1%, 2%, 3% and 5%. , 7%, 10%, 14%, 16%, 20%, 23%, 26%, 30%, 35%, 40%. .. The upper limit of the preferable content of the compound represented by the formula (L-5) with respect to the total amount of the composition of the present invention is 50%, 40%, 35%, and 30%. , 20%, 15%, 10%, 5% The compound represented by the general formula (L-5) is the formula (L-5.1) or the formula (L-5.2). ) Is preferable, and a compound represented by the formula (L-5.1) is particularly preferable.

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

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

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

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

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

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

^{(Wherein, R L61} and ^{R L62} each independently represent the same meaning as ^{R L1} and ^{R L2} in Formula ^{(L), X L61} and ^{X L62} each independently represents a hydrogen atom or a fluorine atom. )
^{Each of RL61} and ^RL62 is preferably an alkyl group having 1 to 5 carbon atoms or an alkenyl group having 2 to 5 carbon atoms, and ^{one of XL61 and XL62} is a fluorine atom and the other is a hydrogen atom. Is preferable.

The compound represented by the general formula (L-6) can be used alone, or two or more compounds can be used in combination. The types of compounds that can be combined are not particularly limited, but they are appropriately combined and used according to the required performance such as solubility at low temperature, transition temperature, electrical reliability, and birefringence. The types of compounds used are, for example, one type, two types, three types, four types, and five or more types as one embodiment of the present invention.

The lower limit of the preferable content of the compound represented by the formula (L-6) with respect to the total amount of the composition of the present invention is 1%, 2%, 3% and 5%. , 7%, 10%, 14%, 16%, 20%, 23%, 26%, 30%, 35%, 40%. .. The upper limit of the preferable content of the compound represented by the formula (L-6) with respect to the total amount of the composition of the present invention is 50%, 40%, 35%, and 30%. , 20%, 15%, 10%, 5%. When the emphasis is on increasing Δn, it is preferable to increase the content, and when the emphasis is on precipitation at a low temperature, the content is preferably small.

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

The types of compounds that can be combined are not particularly limited, but it is preferable to contain 1 to 3 types of these compounds, and even more preferably 1 to 4 types. Further, since the wide molecular weight distribution of the selected compound is also effective for solubility, for example, one kind from the compounds represented by the formula (L-6.1) or (L-6.2), the formula (L-). One type from the compound represented by 6.4) or (L-6.5), one type from the compound represented by the formula (L-6.6) or the formula (L-6.7), one type from the compound represented by the formula (L-6.7), the formula (L). It is preferable to select one kind of compound from the compounds represented by −6.8) or (L-6.9) and combine these appropriately. Among them, it is represented by the formula (L-6.1), the formula (L-6.3), the formula (L-6.4), the formula (L-6.6) and the formula (L-6.9). It preferably contains a compound.

Further, the compound represented by the general formula (L-6) is preferably a compound represented by the formulas (L-6.10) to (L-6.17), for example, and among them, the compound represented by the formula (L-6.17) is preferable. It is preferably a compound represented by L-6.11).

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

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

^{(Wherein, R L71} and ^{R L72} each independently represent the same meaning as ^{R L1} and ^{R L2} in Formula ^{(L), A L71} and ^{A L72} is ^{A L2} and in the general formula (L) independently Although it has the same meaning as ^{A L3 , the hydrogen atoms on A L71} and A ^L72 may be independently substituted with fluorine atoms, and Z ^L71 has the same meaning as ^{Z L2} in the general formula (L). X ^L71 and ^{XL 72} independently represent a fluorine atom or a hydrogen atom.)
In the formula, ^RL71 and ^RL72 are preferably alkyl groups having 1 to 5 carbon atoms, alkenyl groups having 2 to 5 carbon atoms, or alkoxy groups having 1 to 4 carbon atoms, respectively, and ^{AL71 and AL72.} Are each independently preferably a 1,4-cyclohexylene group or a 1,4-phenylene group ^{, the hydrogen atoms on AL71} and ^AL72 may be independently substituted with fluorine atoms, and Z L71 is ^simply. Bonds or COO− are preferred, single bonds are preferred, and ^{XL71 and XL72} are preferably hydrogen atoms.

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

In the composition of the present invention, the content of the compound represented by the general formula (L-7) includes solubility at low temperature, transition temperature, electrical reliability, birefringence, process compatibility, dropping marks, and the like. It is necessary to make appropriate adjustments according to the required performance such as seizure and dielectric anisotropy.

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

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

Further, the compound represented by the general formula (L-7) is preferably a compound represented by the formulas (L-7.1) to (L-7.4), and the compound represented by the formula (L-7. It is preferably a compound represented by 2).

Further, the compound represented by the general formula (L-7) is preferably a compound represented by the formulas (L-7.11) to (L-7.13), and the compound represented by the formula (L-7. It is preferably a compound represented by 11).

Further, the compound represented by the general formula (L-7) is a compound represented by the formulas (L-7.21) to (L-7.23). It is preferably a compound represented by the formula (L-7.21).

Further, the compound represented by the general formula (L-7) is preferably a compound represented by the formulas (L-7.31) to (L-7.34), and the compound represented by the formula (L-7. It is preferably a compound represented by 31) or / and the formula (L-7.32).

Further, the compound represented by the general formula (L-7) is preferably a compound represented by the formulas (L-7.41) to (L-7.44), and the compound represented by the formula (L-7. It is preferably a compound represented by 41) or / and the formula (L-7.42).

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

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

The lower limit of the total preferable content of the compound represented by the general formula (i) in the neutral compound (the compound represented by the general formula (i) and the compound represented by the general formula (L)) is 2. %, 4%, 6%, 8%, 10%, 12%, 14%, 16%. Preferred upper limits are 30%, 25%, 20%, 18%, 16%, 14% and 12%.

The lower limit of the total preferable content of the compounds represented by the general formula (i) and the general formula (L) with respect to the total amount of the composition of the present invention is 5%, 10%, and 15%. It is 20% and 25%. The preferred upper limit of the content is 70%, 60%, 55%, 50%, 45% and 40%.

When the response speed is important, it is preferable to include a compound having an alkenyl group. The upper limit of the total preferable content of the compound having an alkenyl group with respect to the total amount of the composition of the present invention is 95%, 90%, 85%, 80%, and 75%. Yes, 70%, 65%, 60%, 55%, 50%, 45%, 40%, 35%, 30%, 25% Yes, 20%, 15%, 10%, 5%.

When reliability is important, it is preferable to reduce the number of compounds having an alkenyl group. The upper limit of the total preferable content of the compound containing an alkenyl group with respect to the total amount of the composition of the present invention is 30%, 25%, 20%, 15%, and 13%. It is preferably 10%, 8%, 5%, 3%, 2%, 1%, and substantially no content.

Liquid crystal compositions for liquid crystal display devices are required to be designed with appropriate physical characteristics as basic performance. Examples include nematic phase-isotropic liquid phase transition temperature (T _ni ), modulus anisotropy (Δn), modulus anisotropy (Δε), rotational viscosity (γ ₁ ) and various elastic constants (expansion elasticity). Constant: K ₁₁ , torsional elastic constant: K ₂₂ , bending elastic constant: K ₃₃ , their average value _Kave. ).
In order to show a low γ ₁ , it is preferable to contain a compound represented by the general formula (L-1), and the general formula (L-1-1), the general formula (L-1-2) and / or the general formula. It preferably contains a compound represented by the formula (L-1-3).
The compound represented by the general formula (L-1-1) is a compound selected from the compound group represented by the formulas (L-1-1.1) to (L-1-1.3). Is preferable, and the compound is preferably represented by the formula (L-1-1.2) or the formula (L-1-1.3), and in particular, the compound is represented by the formula (L-1-1.3). It is preferably a compound.
The compound represented by the general formula (L-1-2) is a compound selected from the compound group represented by the formulas (L-1-2.1) to (L-1-2.4). Is preferable, and it is preferable that the compound is represented by the formulas (L-1-2.2) to (L-1-2.4). In particular, the compound represented by the formula (L-1-2.2) is preferable because it particularly improves the response rate of the composition of the present invention.
The compound represented by the general formula (L-1--3) is a compound selected from the compound group represented by the formulas (L-1-3.1) to (L-1-3.12). Is preferable, and the compound represented by the formula (L-1-3.1), the formula (L-1-3.3) or the formula (L-1-3.4) is preferable. In particular, the compound represented by the formula (L-1-3.1) is preferable because it particularly improves the response rate of the composition of the present invention.
In order to design a liquid crystal composition showing an appropriate Δn, it is preferable to contain an appropriate amount of a compound showing a large Δn in addition to the compound represented by the general formula (L-1) showing a small Δn. As the dielectrically neutral compound exhibiting a large Δn, it is preferable to contain a compound represented by the general formula (L-3) and / or the general formula (L-5).
The compound represented by the general formula (L-3) is preferably a compound selected from the compound group represented by the formulas (L-3.1) to (L-3.6), preferably the compound represented by the formula (L-3). It is preferably a compound selected from the compound group represented by the formula (-3.1), the formula (L-3.3), the formula (L-3.5) or the formula (L-3.6), and the formula (L. It is preferably a compound represented by L-3.1).
The compound represented by the general formula (L-5) is preferably a compound represented by the formula (L-5.1) or the formula (L-5.2), and in particular, the compound represented by the formula (L-5. It is preferably a compound represented by 1).
In order to design a liquid crystal composition showing an appropriate Δε, it is preferable to contain an appropriate amount of a compound showing a large Δε in addition to the compound represented by the general formula (L-1) showing a small Δn. As the compound showing a large Δε, it is preferable to contain a compound represented by the general formula (N-1d) and / or the general formula (N-1), and the general formula (N-1-10) and the general formula (N-1) are used. -1-11), general formula (N-1-1), general formula (N-1-2), general formula (N-1-3), general formula (N-1--4), general formula (N -1-5), it is preferable to contain a compound represented by the general formula (N-1-18) and / or the general formula (N-1-22).
The compound represented by the general formula (N-1-10) is a compound selected from the compound group represented by the formulas (N-1-10.21) to (N-1-10.21). Is preferable, and the compounds represented by the formulas (N-1-10.1) to (N-1-10.5) formulas (N-110.20) and formulas (N-1-10.21). It is preferably represented by the formula (N-1-10.1), the formula (N-1-10.2), the formula (N-1-10.20) and the formula (N-1-10.21). The compound represented by the above is preferable, the compound represented by the formula (N-1-10.1) and the formula (N-1-10.2) is preferable, and the compound represented by the formula (N-1-10.2) is preferable. Is preferable.
The compound represented by the general formula (N1-1-11) is a compound selected from the compound group represented by the formulas (N-1-11.1) to (N-1-1.14). Is preferable, and the compounds represented by the formulas (N-1-11.2), (N-1-11.4), (N-1-1.11) and (N-1-1.14) are preferable. Is preferable.
The compound represented by the general formula (N-1-1) is a compound selected from the compound group represented by the formulas (N1-1.1) to (N1-1.23). Is preferable, and the compounds represented by the formulas (N-1-1.1) to (N-1-1.4) are preferable, and the formulas (N-1-1.1) and the formula (N-1) are preferable. The compound represented by −1.3) is preferable.
The compound represented by the general formula (N-1-2) is a compound selected from the compound group represented by the formula (N-1-2.22) from the formula (N-1-2.1). Is preferable, from the formula (N-1-2.3) to the formula (N-1-2.7), the formula (N1-2.10), the formula (N-1-2.11), the formula (N). The compound represented by -1-2.13) and the formula (N-1-2.20) is preferable, and the compound represented by the formula (N-1-2.4) is preferable.
The compound represented by the general formula (N-1--3) is a compound selected from the compound group represented by the formulas (N-1-3.21) to (N-1-3.21). Is preferable, and it is preferable that the compound is represented by the formulas (N-1-3.1) to (N-1-3.7) and the formula (N-1-3.21), and the compound is preferably the formula (N-1). -3.1), Eq. (N-1-3.2), Eq. (N-1-3.3), Eq. (N-1-3.4) and Eq. (N-1-3.6) The compound represented is preferred.
The compound represented by the general formula (N-1--4) is a compound selected from the compound group represented by the formulas (N-1-4.1) to (N-1-4.14). Is preferable, and the compounds represented by the formulas (N-1-4.1) to (N-1-4.4) are preferable, and the formulas (N-1-4.1) and the formula (N-1) are preferable. The compounds represented by -4.2) and the formula (N-1-4.4) are preferable.
The compound represented by the general formula (N-1-5) is a compound selected from the compound group represented by the formulas (N-1-5.1) to (N-1-5.6). Is preferable, and compounds represented by the formulas (N-1-5.1), the formula (N-1-5.2) and the formula (N-1-5.4) are preferable.
The compound represented by the general formula (N-1-18) is a compound selected from the compound group represented by the formulas (N-1-18.1) to (N-1-18.5). Is preferable, and the compounds represented by the formulas (N-1-18.1) to (N-1-11.3) are preferable, and the formulas (N-1-18.2) and the formula (N-1) are preferable. The compound represented by -18.3) is preferable.
The compound represented by the general formula (N-1-22) is a compound selected from the compound group represented by the formulas (N-1-22.1) to (N-1-2.12.). Is preferable, and compounds represented by the formulas (N-1-22.1) to (N-1-22.5) are preferable, and the compounds represented by the formulas (N-1-22.1) to (N-1-2.5) are preferable. The compound represented by 22.4) is preferable.
When increasing Δn, compounds represented by the general formula (N-1-3), the general formula (N-1-4), the general formula (N-1-5) and the general formula (N-1-18). It is preferable to contain one kind or two or more kinds of compounds selected from the group, and it is particularly preferable to contain two or more kinds.
It preferably contains two or more compounds selected from the compound group represented by the general formula (N-1-3), the general formula (N-1-4) and the general formula (N-1-18). It is preferable to contain two or more compounds selected from the compound group represented by the general formula (N-1-3) and the general formula (N-1-4), and the general formula (N-1-3) is used. It is preferable to contain two or more kinds of the represented compounds.

Upper limit of the total preferable content of the compound represented by the general formula (N-1d) and the compound represented by the general formula (N-1) having an alkenyl group with respect to the total amount of the composition of the present invention. The values are 20%, 18%, 15%, 13%, 10%, 8%, 5%, 3%, 2%, 1%. It is preferable that the substance is not substantially contained.

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

When the reliability and long-term stability of the composition are emphasized, the content of the compound having a carbonyl group is preferably 5% or less, more preferably 3% or less, based on the total mass of the composition. It is preferably 1% or less, and most preferably not substantially contained.

When the stability by UV irradiation is emphasized, the content of the compound substituted with chlorine atoms is preferably 15% or less, preferably 10% or less, and 8%, based on the total mass of the composition. % Or less, more preferably 5% or less, more preferably 3% or less, and even more preferably substantially no content.

It is preferable to increase the content of the compound having all 6-membered ring structures in the molecule, and the content of the compound having all 6-membered ring structures in the molecule is 80 with respect to the total mass of the composition. % Or more, more preferably 90% or more, further preferably 95% or more, and the composition is composed only of a compound in which substantially all the ring structures in the molecule are 6-membered rings. It is most preferable to do so.

In order to improve the tilt stability of the composition, it is preferable to increase the content of the compound whose side chain is an alkyl group and an alkoxy group, and the content of the compound whose side chain is an alkyl group and an alkoxy group is described above. It is preferably 85% or more, preferably 87% or more, preferably 90% or more, preferably 93% or more, and 95% or more with respect to the total mass of the composition. Is preferable, 98% or more is preferable, and substantially 100% is more preferable. Substantially 100% means 100% excluding polymerizable compounds, stabilizers and additional impurities.

In order to suppress deterioration of the composition due to oxidation, it is preferable to reduce the content of the compound having a cyclohexenylene group as a ring structure, and the content of the compound having a cyclohexenylene group is added to the total mass of the composition. On the other hand, it is preferably 10% or less, preferably 8% or less, more preferably 5% or less, preferably 3% or less, and further preferably substantially not contained.

When the improvement of viscosity and the improvement of Tni are emphasized, the content of the compound having a 2-methylbenzene-1,4-diyl group in which the hydrogen atom may be substituted with halogen may be reduced. Preferably, the content of the compound having a 2-methylbenzene-1,4-diyl group in the molecule is preferably 10% or less, preferably 8% or less, based on the total mass of the composition. It is more preferably 5% or less, more preferably 3% or less, and further preferably substantially not contained.

In the present application, substantially not contained means that it is not contained except for an unintentionally contained substance.

When the compound contained in the composition of the first embodiment of the present invention has an alkenyl group as a side chain, and the alkenyl group is bonded to cyclohexane, the number of carbon atoms of the alkenyl group is 2 to 5. When the alkenyl group is bonded to benzene, the number of carbon atoms of the alkenyl group is preferably 4 to 5, and the unsaturated bond of the alkenyl group and benzene are directly bonded. It is preferable that there is no such thing.

_{The average elastic constant (KAVG} ) of the liquid crystal composition used in the present invention is preferably 10 to 25, but the lower limit thereof is preferably 10 is preferable, 10.5 is preferable, 11 is preferable, and 11.5 is preferable. , 12 is preferred, 12.3 is preferred, 12.5 is preferred, 12.8 is preferred, 13 is preferred, 13.3 is preferred, 13.5 is preferred, 13.8 is preferred, 14 is preferred, 14 .3 is preferred, 14.5 is preferred, 14.8 is preferred, 15 is preferred, 15.3 is preferred, 15.5 is preferred, 15.8 is preferred, 16 is preferred, 16.3 is preferred, 16 .5 is preferable, 16.8 is preferable, 17, is preferable, 17.3 is preferable, 17.5 is preferable, 17.8 is preferable, 18 is preferable, and 25 is preferable and 24.5 is preferable as the upper limit value thereof. Is preferable, 24 is preferable, 23.5 is preferable, 23 is preferable, 22.8 is preferable, 22.5 is preferable, 22.3 is preferable, 22 is preferable, 21.8 is preferable, and 21.5 is preferable. , 21.3 is preferable, 21 is preferable, 20.8 is preferable, 20.5 is preferable, 20.3 is preferable, 20 is preferable, 19.8 is preferable, 19.5 is preferable, and 19.3 is preferable. , 19 is preferred, 18.8 is preferred, 18.5 is preferred, 18.3 is preferred, 18 is preferred, 17.8 is preferred, 17.5 is preferred, 17.3 is preferred, and 17 is preferred. When emphasizing power reduction, it is effective to suppress the amount of light of the backlight, it is preferred that the liquid crystal display device to improve the light transmittance, it To achieve this the set lower value of K _AVG preferable. When the improvement of the response speed and the contrast is emphasized, it is preferable to set the value of _{KAVG to a high value.}

In the composition of the present invention, one kind or two or more kinds of polymerizations are made in order to produce a liquid crystal display element such as a vertically oriented PSA mode, a vertically oriented PSVA mode, a transverse electric field type PSA mode or a transverse electric field type PSVA mode. It can contain a sex compound.

The liquid crystal composition of the present invention has the general formula (II).

^{(Wherein, R 201, R 202, R} 203, R 204, R 205, R 206, R 207, R 208, R 209 and ^{R 210} each ^{independently,} P 21 ^{-S 21} -, fluorine atom Represents any of an alkyl group having 1 to 18 carbon atoms which may be substituted, an alkoxy group having 1 to 18 carbon atoms which may be substituted by a fluorine atom, a fluorine atom or a hydrogen atom.
P ²¹ are each independently formula from the formula (R-1) (R- 9)

(In the formula, R ¹¹ , R ¹² , R ¹³ , R ¹⁴ and R ¹⁵ independently represent either an alkyl group having 1 to 5 carbon atoms, a fluorine atom or a hydrogen atom, and m ^r5 , m. ^r7 , n ^r5 and n ^r7 each independently represent a polymerizable group selected from 0, 1, or 2).
S ²¹ represents a single bond or an alkylene group having 1 to 15 carbon atoms, and one or more -CH _2- in the alkylene group is -O-,-so that oxygen atoms are not directly adjacent to each other. May be replaced with OCO- or -COO-,
n ²¹ represents 0, 1 or 2,
A ²¹ is
(A) 1,4-cyclohexylene group (this is present in the group one -CH ₂ - or nonadjacent two or more -CH ₂ - may be replaced by -O-.)
(B) 1,4-phenylene group (one -CH = existing in this group or two or more -CH = not adjacent to each other may be replaced with -N =) and (c). Naphthalene-2,6-diyl group, 1,2,3,4-tetrahydronaphthalene-2,6-diyl group or decahydronaphthalene-2,6-diyl group (naphthalene-2,6-diyl group or 1,2) , 3,4-Tetrahydronaphthalene-2,6-Diyl Group, one -CH = or two or more non-adjacent -CH = may be replaced with -N =).
Represents a group selected from the group consisting of, and the above groups (a), groups (b) and groups (c) are independently alkyl groups having 1 to 12 carbon atoms and 1 to 12 carbon atoms, respectively. It may be substituted with an alkoxy group, a halogen, a cyano group, a nitro group or P ²¹ −S ^{21 −.
It has at least one P 21} −S ²¹ − in one molecule of the above general formula (II), and has
L ²¹ represents a single _{bond, -OCH 2 -, - CH 2} O -, - C 2 H 4 -, - OC 2 H 4 O -, - COO -, - OCO -, - CH = CR a -COO -, - CH = CR ^a- OCO-, -COO-CR ^a = CH- ^{, -OCO-CR a} = CH-,-(CH ₂ ) _z- COO-,-(CH ₂ ) _z- OCO-, -OCO- ( CH ₂ ) _z- , -COO- (CH ₂ ) _z- , -CH = CH-, -CF ₂ O-, -OCF _2- or -C ≡ C- (In the formula, ^Ra is independently hydrogen. It represents an atom or an alkyl group having 1 to 3 carbon atoms, and in the above formula, z independently represents an integer of 1 to 4).
When a ^{plurality of P 21} , S ²¹ , and A ²¹ exist, they may be the same or different from each other. ) Is preferable.

In the above general formula (II), it is preferable to have ^{1 or 2 or more P 21} −S ²¹ − in one molecule of the compound represented by the general formula (II), ^{and 4 or less P 21} −S ²¹ −. ^{The number of P 21} −S ²¹ − present in one molecule of the general formula (II) is preferably 1 or more and 4 or less, more preferably 1 or more and 3 or less, and the general formula (II). ^{The number of P 21} − S ²¹ − in the molecule of the compound represented by is particularly preferably 2 or 3.

That is, the compound represented by the general formula (II) ^{has a structure in which at least two benzene rings and, if necessary, ring A 21} are linked, and P ²¹ −S ²¹ − in these plurality of benzene rings and ring A ^21. The compound represented by the general formula (II) exerts an action / effect as a polymerizable compound because it has at least one of.

In the above general formula (II), one or more selected from the group consisting of ^{R 201} , R ²⁰² , R ²⁰³ , R ²⁰⁴ , R ²⁰⁵ , R ²⁰⁶ , R ²⁰⁷ , R ²⁰⁸ , R ²⁰⁹ and R ^210. If it ^{is, R 201, R 202, R} 204, R 207, R 209 or one or two or more either ^{R 210} is ^{P 21 -S} 21 - - but ^P 21 ^{-S 21} is preferably , R ²⁰¹ and R ²¹⁰ are more preferably P ²¹ −S ^{21 −.}

In the above general formula (II), ^{it is preferable that R 201} and R ²¹⁰ are independently P ²¹ −S ²¹ −, and in this case, R ²⁰¹ and R ²¹⁰ are the same P ²¹ −S ²¹ −. even different ^P 21 ^{-S 21} - may be.

In the general formula ^{(II), R 201, R} 202, R 203, R 204, R 205, R 206, R 207, R 208, R 209 and ^{R 210} each ^{independently,} P 21 ^{-S 21} - , An alkyl group having 1 to 18 carbon atoms which may be substituted with a fluorine atom, an alkoxy group having 1 to 18 carbon atoms which may be substituted with a fluorine atom, a fluorine atom or a hydrogen atom. In the case, the preferred number of carbon atoms of the alkyl group and the alkoxy group is 1 to 16, more preferably 1 to 10, still more preferably 1 to 8, still more preferably 1 to 6, and further. It is more preferably 1 to 4, and particularly preferably 1 to 3. Further, the alkyl group and the alkoxy group may be linear or branched, but linear is particularly preferable.

In the above general formula (II), R ²⁰² , R ²⁰³ , R ²⁰⁴ , R ²⁰⁵ , R ²⁰⁶ , R ²⁰⁷ , R ²⁰⁸ and R ²⁰⁹ are independently ^{derived from P 21} − S ²¹ − and 1 carbon atom. 3 alkyl group, preferably a fluorine atom or a hydrogen atom, P ^{21 -S} 21 ^-, more preferably a fluorine atom or a hydrogen atom, more preferably a fluorine atom or a hydrogen atom.

P ²¹ is preferably of the formula (R-1), more preferably an acrylic group or a methacrylic group, and even more preferably a methacrylic group.

S ²¹ is preferably a single bond or an alkylene group having 1 to 3 carbon atoms, and more preferably a single bond.

In the above general formula (II), n ²¹ is preferably 0 or 1.

In the above general formula (II), A ²¹ is preferably a 1,4-phenylene group or a naphthalene-2,6-diyl group, and more preferably a 1,4-phenylene group.

In the general formula ^{(II), L 21} represents a single _{bond, -OCH 2 -, - CH 2} O -, - C 2 H 4 -, - COO -, - OCO -, - CH = CH-COO -, - CH = CH-OCO -, - COO-CH = CH -, - OCO-CH = CH -, - C 2 H 4 -COO -, - C 2 H 4 -OCO -, - OCO-C 2 H 4 -, _{-COO-C 2 H 4 -,} - CH = CH -, - CF 2 O -, - OCF 2 - or -C≡C- is preferred.

The total content of the polymerizable compound represented by the general formula (II) is 0.01 to 5% by mass, but the lower limit of the content is preferably 0.02% by mass, preferably 0.03% by mass. 0.04% by mass is preferable, 0.05% by mass is preferable, 0.06% by mass is preferable, 0.07% by mass is preferable, 0.08% by mass is preferable, 0.09% by mass is preferable, and 0. 1% by mass is preferable, 0.15% by mass is preferable, 0.2% by mass is preferable, 0.25% by mass is preferable, 0.3% by mass is preferable, 0.35% by mass is preferable, and 0.4% by mass is preferable. % Is preferable, 0.5% by mass is preferable, 0.55% by mass is preferable, and the upper limit of the content is preferably 4.5% by mass, preferably 4% by mass, preferably 3.5% by mass, and 3% by mass. % Is preferable, 2.5% by mass is preferable, 2% by mass is preferable, 1.5% by mass is preferable, 1% by mass is preferable, 0.95% by mass is preferable, 0.9% by mass is preferable, and 0. 85% by mass is preferable, 0.8% by mass is preferable, 0.75% by mass is preferable, 0.7% by mass is preferable, 0.65% by mass is preferable, 0.6% by mass is preferable, and 0.55% by mass is preferable. % Is preferable.

The compound represented by the general formula (II) according to the present invention is preferably a polymerizable compound represented by the general formula (IV).

In the general formula (IV), R ⁷ and R ⁸ independently represent any of the above formulas (R-1) to (R-9), and X ¹ to X ⁸ are independent of each other. Then, it represents a trifluoromethyl group, a fluorine atom, a hydrogen atom, or an alkoxy group having 1 to 5 carbon atoms.

In the above general formula (IV), ^{it is preferable that R 7} and R ⁸ are independently methacrylic groups or acrylic groups, respectively.

The compound represented by the general formula (IV) is more preferably one kind or two or more kinds selected from the group consisting of the formulas (IV-11) to (IV-19), and more preferably the formula (IV-). 11), formula (IV-16), and formula (IV-17) are particularly preferable.

The compound represented by the general formula (II) according to the present invention is preferably, for example, a compound represented by the general formula (XX-1) to the general formula (XX-21), and the compound represented by the general formula (XX-1) is preferable. From the formula (XX-7), the formula (XX-14) to the formula (XX-29) are more preferable.

From the formula (XX-1) to the general formula (XX-29), Sp ^xx is an alkylene group having 1 to 8 carbon atoms or −O− (CH ₂ ) _s − (in the formula, s is an integer from 1 to 7). It represents an oxygen atom that is bound to a ring.)

From formula (XX-1) to general formula (XX-29), the hydrogen atom in the 1,4-phenylene group is further added to -F, -Cl, -CF ₃ , -CH ₃ or formula (R-1). May be replaced by any of the formulas (R-15).

Further, as the compound represented by the general formula (II), for example, a polymerizable compound represented by the formulas (M1) to (M18) is preferable.

In addition, polymerizable compounds of formulas (M19) to (M34) are also preferable.

The hydrogen atoms in the 1,4-phenylene group and the naphthalene group in the formulas (M19) to (M34) may be further substituted with _{-F, -Cl, -CF 3} , and -CH _3.

Further, as the compound represented by the general formula (II), a polymerizable compound represented by the formulas (M35) to (M65) is also preferable.

In the polymerizable compound-containing liquid crystal composition according to the present invention, the content of the polymerizable compound represented by the formulas (M1) to (M65) with respect to the entire liquid crystal composition is 0.01 to 5% by mass. The lower limit of the content is preferably 0.02% by mass, preferably 0.03% by mass, preferably 0.04% by mass, preferably 0.05% by mass, preferably 0.06% by mass, and 0.07% by mass. Is preferable, 0.08% by mass is preferable, 0.09% by mass is preferable, 0.1% by mass is preferable, 0.15% by mass is preferable, 0.2% by mass is preferable, and 0.25% by mass is preferable. , 0.3% by mass, preferably 0.35% by mass, preferably 0.4% by mass, preferably 0.5% by mass, preferably 0.55% by mass, and the upper limit of the content is 4.5% by mass. % Is preferable, 4% by mass is preferable, 3.5% by mass is preferable, 3% by mass is preferable, 2.5% by mass is preferable, 2% by mass is preferable, 1.5% by mass is preferable, and 1% by mass is preferable. Preferably, 0.95% by mass is preferable, 0.9% by mass is preferable, 0.85% by mass is preferable, 0.8% by mass is preferable, 0.75% by mass is preferable, and 0.7% by mass is preferable. 0.65% by mass is preferable, 0.6% by mass is preferable, and 0.55% by mass is preferable.

When the monomer is added to the composition of the present invention, the polymerization proceeds even in the absence of the polymerization initiator, but the polymerization initiator may be contained in order to promote the polymerization. Examples of the polymerization initiator include benzoin ethers, benzophenones, acetophenones, benzyl ketals, acylphosphine oxides and the like.

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

(Wherein, R ^Q represents a straight-chain alkyl group or branched alkyl group having from 1 22 carbon atoms, one or two or more CH ₂ groups in the alkyl group, so that the oxygen atoms are not directly adjacent a, -O -, - CH = CH -, - CO -, - OCO -, - COO -, - C≡C -, - CF 2 O -, - OCF 2 - may be substituted with, in ^{R Q} hydrogen atoms, 4-hydroxy-3,5-di -t- butyl phenyl group may be substituted by, ^{M Q} is trans-1,4-cyclohexylene group, 1,4-phenylene group or a single bond However, one or two non-adjacent -CH _2- in the trans-1,4-cyclohexylene group may be substituted with -O-.)
^RQ represents a linear alkyl group or a branched chain alkyl group having 1 to 22 carbon atoms, and one or more CH ₂ groups in the alkyl group are −O so that oxygen atoms are not directly adjacent to each other. −, −CH = CH−, −CO−, −OCO−, −COO−, −C≡C−, −CF ₂ O−, −OCF ₂₋ may be substituted, but the number of carbon atoms is 1 to 10. Linear alkyl group, linear alkoxy group, linear alkyl group in which one CH ₂ group is substituted with -OCO- or -COO-, branched chain alkyl group, branched alkoxy group, one CH ₂ group is -OCO- Alternatively, a branched chain alkyl group substituted with -COO- is preferable, a linear alkyl group having 1 to 20 carbon atoms, and a linear alkyl group in which one CH ₂ group is substituted with -OCO- or -COO-, or branched. A chain alkyl group, a branched alkoxy group, _{and a branched chain alkyl group in which one CH 2} group is substituted with -OCO- or -COO- are further preferable. ^MQ represents a trans-1,4-cyclohexylene group, a 1,4-phenylene group or a single bond, with a trans-1,4-cyclohexylene group or a 1,4-phenylene group being preferred.

More specifically, the compound represented by the general formula (Q) is preferably a compound represented by the following general formulas (Qa) to (Qe).

Wherein, R ^Q1 is preferably a linear alkyl group or branched alkyl group having 1 to 10 carbon atoms, R ^Q2 is preferably a linear alkyl group or branched alkyl group having 1 to 20 carbon atoms, R ^Q3 is linear alkyl group having a carbon number of 1 to 8, branched chain alkyl group, preferably a linear alkoxy group or a branched chain alkoxy group, L ^Q is preferably a linear alkylene group or branched alkylene group having 1 to 8 carbon atoms .. Among the compounds represented by the general formulas (Q-a) to the general formula (Q-e), the compounds represented by the general formulas (Q-a), the general formula (Q-c) and the general formula (Q-e). Is more preferable.

Formulas (Q-11) to (Q-15) are particularly preferable as specific compounds represented by the general formula (Q).

The composition of the present invention preferably contains one or two compounds represented by the general formula (Q), more preferably one to five, and the lower limit of the preferable content is 0.0001%, 0.0002%, 0.0005%, 0.001%, 0.002%, 0.005%, 0.01%, 0 .015%, 0.02%, 0.05%, 0.75%, 0.01%, and the upper limit of the preferred content is 1%, 1%. , 0.9%, 0.8%, 0.7%, 0.6%, 0.5%, 0.4%, 0.3%, 0.25%, 0.2%, 0.19%, 0.18%, 0.17%, 0.16%, 0.15%.

The liquid crystal composition of the present invention may also contain at least one compound represented by the general formula (I-1).

In the general formula (I-1), ^RHS independently represents a hydrogen atom or an alkyl group having 1 to 10 carbon atoms, but a hydrogen atom is particularly preferable. In the case of an alkyl group, the number of carbon atoms is preferably 1 to 8, preferably 1 to 5, preferably 1 to 3, and preferably 1 carbon atom. More preferred. When ^{there are a plurality of RHS} , they may be the same or different.

M ^HS represents an alkyl group having 1 to 15 carbon atoms when n ^HS represents 1, and represents an alkylene group having 1 to 15 carbon atoms when ^{n HS} represents an integer of 2 to 6, and is present in ^{M HS.} One or more −CH ₂ −s are −O−, −CH = CH−, −C≡C−, −CO−, −OCO−, −COO−, trans-1,4-cyclohexylene groups, 1 , 4-Phenylene group, Naphthalene-2,6-Diyl group may be substituted, but considering the viscosity given to the liquid crystal composition and its own volatility, ^MHS is an alkyl group having 2 to 10 carbon atoms or an alkyl group. An alkylene group is preferable, an alkyl group or alkylene group having 2 to 8 carbon atoms is preferable, an alkyl group or alkylene group having 4 to 8 carbon atoms is preferable, and an alkyl group or alkylene group having 6 or 8 carbon atoms is preferable. The ^MHS may be linear or branched.

n ^HS represents an integer from 1 to 6, preferably 2 to 4.

When n ^HS represents 1, the compound represented by the general formula (I-1) is a compound represented by the general formula (I-11), the general formula (I-12) or the general formula (I-13). Is preferable.

(In the formula, ^RH11 independently represents a hydrogen atom or an alkyl group having 1 to 10 carbon atoms, and M represents an alkylene group having 1 to 13 carbon atoms.)

^{(Wherein, R H12} and ^{R 112} each independently represents a hydrogen atom or an alkyl group having 1 to 10 carbon atoms.)

^{(Wherein, R H13} and ^{R 113} each independently represents a hydrogen atom or an alkyl group having 1 to 30 carbon atoms.)

When n ^HS represents 2, the compound represented by the general formula (I-1) is preferably a compound represented by the general formula (I-2).

(In the formula, ^RH1 and ^RH2 each independently represent a hydrogen atom or an alkyl group having 1 to 10 carbon atoms, and M represents an alkylene group having 1 to 15 carbon atoms, which are present in M. One or more -CH _2- is -O-, -CH = CH-, -C≡C-, -CO-, -OCO-, -COO-, trans-1,4-cyclohexylene group, 1, It may be substituted with a 4-phenylene group or a naphthalene-2,6-diyl group.)
In the general formula (I-2), ^RH1 and ^RH2 are particularly preferably hydrogen atoms. In the case of an alkyl group, the number of carbon atoms is preferably 1 to 8, preferably 1 to 5, preferably 1 to 3, and preferably 1 carbon atom. More preferred.
In the general formula (I-2), M represents an alkylene group having 1 to 15 carbon atoms, but considering the viscosity given to the liquid crystal composition and its own volatility, M represents an alkylene group having 2 to 10 carbon atoms. Preferably, an alkylene having 4 to 8 carbon atoms is preferable, and an alkylene having 6 or 8 carbon atoms is preferable.
Specific examples thereof include compounds represented by the general formula (I-24), the general formula (I-26) and the general formula (I-28). The ^{R H1} and ^{R H2} in these formulas are as previously described.

More specifically, the compounds represented by the general formula (I-24H), the general formula (I-26H) and the general formula (I-28H) can be mentioned, and the bis represented by the general formula (I-28H) can be mentioned. (2,2,6,6,-Tetramethyl-4-piperidyl) Sebacate is the most appropriate.

When ^nHS represents an integer of 3 to 6, the compound represented by the general formula (I-1) is preferably a compound represented by the general formula (I-3). Since the compound represented by the general formula (I-3) has a high effective amine concentration, it is a compound that acts more effectively. Further, among the compounds represented by the general formula (I-1), those having a small molecular weight are often adsorbed on the alignment film in the liquid crystal display element and induce display unevenness. Since the compound represented by 3) has a large molecular weight, it is possible to prevent the induction of display unevenness.

(In the formula, ^RH3 , ^RH4 and ^RH5 each independently represent a hydrogen atom or an alkyl group having 1 to 10 carbon atoms. N ^H1 and n ^H2 independently represent 0 or 1, respectively. ^H3 represents an integer from 1 to 4. n When ^H3 is 2, 3 or 4, and ^{there are a plurality of RH5} , they may be the same or different.)
In the general formula (I-3), ^RH3 , ^RH4 and ^RH5 are particularly preferably hydrogen atoms. In the case of an alkyl group, the number of carbon atoms is preferably 1 to 8, preferably 1 to 5, preferably 1 to 3, and preferably 1 carbon atom. More preferred.

Specifically, compounds represented by the general formula (I-31), the general formula (I-32) and the general formula (I-33) are preferable. ^{R H3, R H4} and ^{R H5} in these formulas are as previously described.

More specifically, compounds represented by the formulas (I-31H), formula (I-31C), formula (I-32H) and formula (I-33H) are preferable.

In the liquid crystal composition, the compound represented by the general formula (I-1) is preferably contained in the composition as a lower limit value of 0.01% or more, preferably 0.02% or more, and is 0. It is preferably contained in an amount of .03% or more, preferably 0.05% or more, preferably 0.07% or more, preferably 0.1% or more, and 0.15% or more. It is preferable to contain 0.2% or more, preferably 0.25% or more, preferably 0.3% or more, preferably 0.5% or more, and 1%. It is preferable to contain the above. Further, as an upper limit value, it is preferably contained in an amount of 5% or less, preferably 3% or less, preferably 1% or less, preferably 0.5% or less, and 0.45% or less. It is preferably contained in an amount of 0.4% or less, preferably 0.35% or less, preferably 0.3% or less, preferably 0.25% or less, and 0. It is preferably contained in an amount of 2% or less, preferably 0.15% or less, preferably 0.1% or less, preferably 0.07% or less, and preferably 0.05% or less. Is preferable, and the content is preferably 0.03% or less.

More specifically, it is preferably contained in an amount of 0.01 to 5% by mass, preferably 0.01 to 0.3% by mass, and even more preferably 0.02 to 0.3% by mass. It is particularly preferably 0.05 to 0.25% by mass. More specifically, when the suppression of precipitation at low temperature is emphasized, the content thereof is preferably 0.01 to 0.1% by mass.

Further, the liquid crystal composition of the present invention may further contain an antioxidant and / or a light stabilizer. More specifically, the compounds represented by the following (III-1) to (III-38) are preferable.

(In the formula, n represents an integer from 0 to 20.)
The composition of the present invention is a compound represented by the general formula (Q), a compound represented by the general formula (I-1), and an antioxidant represented by the general formulas (III-1) to (III-38). A compound selected from an agent and / or a light stabilizer can be contained in combination. In the liquid crystal composition, the content of these additives is preferably 0.01% or more, preferably 0.02% or more, and 0.03% or more as the lower limit value in the composition. It is preferably contained in an amount of 0.05% or more, preferably 0.07% or more, preferably 0.1% or more, preferably 0.15% or more, and 0. .2% or more is preferable, 0.25% or more is preferably contained, 0.3% or more is preferably contained, 0.5% or more is preferably contained, and 1% or more is contained. preferable. Further, as an upper limit value, it is preferably contained in an amount of 5% or less, preferably 3% or less, preferably 1% or less, preferably 0.5% or less, and 0.45% or less. It is preferably contained in an amount of 0.4% or less, preferably 0.35% or less, preferably 0.3% or less, preferably 0.25% or less, and 0. It is preferably contained in an amount of 2% or less, preferably 0.15% or less, preferably 0.1% or less, preferably 0.07% or less, and preferably 0.05% or less. Is preferable, and the content is preferably 0.03% or less.

More specifically, it is preferably contained in an amount of 0.01 to 5% by mass, preferably 0.01 to 0.3% by mass, and even more preferably 0.02 to 0.3% by mass. It is particularly preferably 0.05 to 0.25% by mass. More specifically, when the suppression of precipitation at low temperature is emphasized, the content thereof is preferably 0.01 to 0.1% by mass.
Generally, various parameters calculated from the physical property values of the liquid crystal composition are used as a method for expressing the characteristics of the liquid crystal display element. _{They include γ 1} / K ₃₃ or γ ₁ / K _ave , which governs the response speed, _{K 11} / K ₃₃ , which governs the steepness of the electro-optical effect, and parameters that govern the drive voltage. There are | K ₃₃ / Δε | or | K _ave / Δε | and K _ave which strongly controls the contrast. The liquid crystal composition of the present invention has both high-speed response, low drive voltage, good low-temperature storage stability, high transmittance and high contrast. In this specification, _Kave is defined as the average value of K ₁₁ and K _{33.
Therefore, γ 1} / K _33, which is a parameter that controls the response speed of the vertically oriented liquid crystal display element, is 10. 0 mPa · s · pN ^-1 or less is preferable, 9.8 mPa · s · pN ^-1 or less is preferable, 9.5 mPa · s · pN ^-1 or less is preferable, 9.2 mPa · s · pN ^-1 or less is preferable. preferably 9.0mPa · s · ^{pN -1} or less, preferably 8.8mPa · s · ^{pN -1} or less, preferably 8.6mPa · s · ^{pN -1} or less, 8.4mPa · s · ^{pN -1} or less Preferably, it is preferably 8.2 mPa · s · pN ^-1 or less, preferably 8.0 mPa · s · pN ^-1 or less, preferably 7.8 mPa · s · pN ^-1 or less, and 7.6 mPa · s · pN ^-1. The following is preferable, 7.4 mPa · s · pN ^-1 or less is preferable, 7.2 mPa · s · pN ^-1 or less is preferable, 7.0 mPa · s · pN ^-1 or less is preferable, and 6.8 mPa · s · pN ^-1 or less is preferable, and 6.6 mPa · s · pN ^-1 or less is particularly preferable.
_{The parameter γ 1} / K _ave that controls the response speed of the horizontally oriented liquid crystal display element is 10. 0 mPa · s · pN ^-1 or less is preferable, 9.8 mPa · s · pN ^-1 or less is preferable, 9.5 mPa · s · pN ^-1 or less is preferable, 9.2 mPa · s · pN ^-1 or less is preferable. preferably 9.0mPa · s · ^{pN -1} or less, preferably 8.8mPa · s · ^{pN -1} or less, preferably 8.6mPa · s · ^{pN -1} or less, 8.4mPa · s · ^{pN -1} or less Preferably, it is preferably 8.2 mPa · s · pN ^-1 or less, preferably 8.0 mPa · s · pN ^-1 or less, preferably 7.8 mPa · s · pN ^-1 or less, and 7.6 mPa · s · pN ^-1. The following is preferable, 7.4 mPa · s · pN ^-1 or less is preferable, 7.2 mPa · s · pN ^-1 or less is preferable, 7.0 mPa · s · pN ^-1 or less is preferable, and 6.8 mPa · s · pN ^-1 or less is preferable, and 6.6 mPa · s · pN ^-1 or less is particularly preferable.
_{In the vertically oriented liquid crystal display element, K 11} / K _33, which is a parameter governing the steepness of the electro-optical effect, is preferably 1.30 or less, preferably 1.25 or less, preferably 1.20 or less, and 1.18 or less. Preferably, 1.15 or less is preferable, 1.12 or less is preferable, 1.10 or less is preferable, 1.08 or less is preferable, 1.06 or less is preferable, 1.04 or less is preferable, and 1.02 or less is preferable. , 1.00 or less is particularly preferable.
_{The parameter | K 33} / Δε | that governs the drive voltage of the vertically oriented liquid crystal display element is preferably 6.0 pN or less, preferably 5.9 pN or less, preferably 5.8 pN or less, and preferably 5.7 pN or less. 6. 6pN or less is preferable, 5.5pN or less is preferable, 5.4pN or less is preferable, 5.3pN or less is preferable, 5.2pN or less is preferable, 5.1pN or less is preferable, 5.0pN or less is preferable, and 4. 9 pN or less is preferable, and 4.8 pN or less is particularly preferable.
Is a parameter governing the driving voltage of the horizontal alignment liquid crystal display element _{| K ave} / _{Δε |} is preferably equal 6.0PN, less preferably 5.9PN, less preferably 5.8PN, less preferably 5.7pN, 5 6. 6 pN or less is preferable, 5.5 pN or less is preferable, 5.4 pN or less is preferable, 5.3 pN or less is preferable, 5.2 pN or less is preferable, 5.1 pN or less is preferable, 5.0 pN or less is preferable, and 4. 9 pN or less is preferable, and 4.8 pN or less is particularly preferable.
_{K ave} is preferably at least 10.0pN a parameter governing the contrast of a liquid crystal display device,
10.5pN or more is preferable, 11.0pN or more is preferable, 11.5pN or more is preferable, 12.0pN or more is preferable, 12.5pN or more is preferable, 13.0pN or more is preferable, 13.0pN or more is preferable, and 14 .0 pN or more is preferable, 14.2 pN or more is preferable, 14.4 pN or more is preferable, 14.6 pN or more is preferable, 14.8 pN or more is preferable, 15.0 pN or more is preferable, 15.2 pN or more is preferable, and 15. 4pN or more is preferable, 15.6pN or more is preferable, 15.8pN or more is preferable, 16.0pN or more is preferable, 16.2pN or more is preferable, 16.4pN or more is preferable, 16.6pN or more is preferable, and 16.8pN is preferable. The above is preferable, 17.0 pN or more is preferable, 17.2 pN or more is preferable, 17.4 pN or more is preferable, 17.6 pN or more is preferable, 17.8 pN or more is preferable, and 18.0 pN or more is particularly preferable.
In particular, in the case of a horizontally oriented liquid crystal display element which is disadvantageous to contrast, 16.0 pN or more is preferable, 16.2 pN or more is preferable, 16.4 pN or more is preferable, 16.6 pN or more is preferable, 16.8 pN or more is preferable, and 17. 0 pN or more is preferable, 17.2 pN or more is preferable, 17.4 pN or more is preferable, 17.6 pN or more is preferable, 17.8 pN or more is preferable, and 18.0 pN or more is particularly preferable.

The composition containing the polymerizable compound of the present invention is imparted with a liquid crystal orientation ability by polymerizing the polymerizable compound contained therein by irradiation with ultraviolet rays, and the amount of transmitted light is controlled by utilizing the birefringence of the composition. Used for liquid crystal display elements.

The liquid crystal display element using the composition of the present invention is useful for achieving both high-speed response and suppression of display defects, and is particularly useful for a liquid crystal display element for driving an active matrix, and is used in VA mode, PSVA mode, and PSA. It can be applied to a liquid crystal display element for mode, IPS mode, FFS mode or ECB mode.

Further, in the manufacturing process of the liquid crystal display element by the ODF method, it is necessary to drop the optimum liquid crystal injection amount according to the size of the liquid crystal display element, but the liquid crystal composition of the present invention is, for example, dropped when the liquid crystal is dropped. The yield of the liquid crystal display element can be kept high because the liquid crystal can be stably dropped over a long period of time with little influence on a sudden pressure change or impact in the device. In particular, the small liquid crystal display element often used in smartphones, which has become popular recently, is difficult to control the deviation from the optimum value within a certain range because the optimum liquid crystal injection amount is small. By using an object, a stable liquid crystal material discharge amount can be realized even in a small liquid crystal display element.

The present invention will be described in more detail with reference to Examples below, but the present invention is not limited to these Examples. In addition, "%" in the compositions of the following Examples and Comparative Examples means "mass%".

In the examples, the measured characteristics are as follows.

T _ni : Nematic phase-isotropic liquid phase transition temperature (° C)
Δn: Refractive index anisotropy at 293K Δε: Dielectric anisotropy at _{293K γ 1} : Rotational viscosity at 293K (mPa · s)
K ₁₁ : Elastic constant of spread at 293K (pN)
K ₂₂ : Twist elastic constant (pN) at 293K
K ₃₃ : Elastic modulus of bending at 293K (pN)
K _ave. : Average elastic constant (pN) at 293K
In the examples, the following abbreviations are used for the description of the compound.
(Ring structure)

(Side chain structure)

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

(However, n in the table is a natural number.)
(Criteria)
When evaluating the characteristics of a horizontally oriented liquid crystal display element, each of the prepared liquid crystal compositions is injected by a vacuum injection method into a cell with a comb-toothed ITO coated with a polyimide alignment film that induces homogeneous orientation. Then, an in-plane switching (IPS) liquid crystal display element was obtained. The electro-optical characteristics of these obtained IPS liquid crystal display elements were measured, and the drive voltage, response speed, transmittance, contrast, and the like were evaluated. The results were judged in three stages: "○: no problem level", "Δ: slightly insufficient and unacceptable level", and "×: unacceptable level". When evaluating a liquid crystal composition having a Δn of less than 0.105, a cell having a cell gap of 2.8 μm is used, and when evaluating a liquid crystal composition having a Δn of 0.105 or more, a cell having a cell gap of 2.6 μm is used. did.

When evaluating the characteristics of a vertically oriented liquid crystal display element, the prepared liquid crystal compositions are injected into a cell with ITO coated with a polyimide alignment film that induces homeotropic orientation by a vacuum injection method, thereby vertically orienting (VA). ) A liquid crystal display element was obtained. The electro-optical characteristics of these obtained VA liquid crystal display elements were measured, and the drive voltage, response speed, transmittance, contrast, and the like were evaluated. The results were judged in three stages: "○: no problem level", "Δ: slightly insufficient and unacceptable level", and "×: unacceptable level". When evaluating a liquid crystal composition having a Δn of less than 0.105, a cell having a cell gap of 3.3 μm is used, and when evaluating a liquid crystal composition having a Δn of 0.105 or more, a cell having a cell gap of 3.0 μm is used. did.

When evaluating a liquid crystal display element that regulates the orientation of liquid crystal molecules by adding a polymerizable compound to a liquid crystal composition and photopolymerizing it, as typified by polymer-stabilized vertical orientation (PSVA), the injected liquid crystal display element On the other hand, in the case of a VA liquid crystal display element, the liquid crystal display element is exposed to about 10 J with a UV lamp having an intensity of about ^{100 mW / cm-2 (365 nm) while applying a rectangular wave of 10 V and 100 Hz, and further, the voltage is further increased.} A polymer-stabilized vertical orientation (PSVA) liquid crystal display element was obtained by exposing to about 100 J in a state where the above was cut off. In the case of an IPS or FFS liquid crystal display element, a polymer-stabilized horizontal alignment (PS-IPS or PS-FFS) liquid crystal display element was obtained by exposing about 100 J as it was without applying a voltage. The electro-optical characteristics of these obtained liquid crystal display elements were measured, and the drive voltage, response speed, transmittance, contrast, and the like were evaluated. The results were judged in three stages: "○: no problem level", "Δ: slightly insufficient and unacceptable level", and "×: unacceptable level".
(Comparative Example 1 and Example 1)
A liquid crystal composition of LC-A as a comparative example and LC-1 as an example was prepared, and its physical characteristics were measured. The composition of the liquid crystal composition and the results of its physical property values are shown below.

LC-1 (Example 1) and LC-A (Comparative Example 1) is a parameter governing the response speed gamma ₁ / _{K ave.} Is a sufficiently small parameter that governs the drive voltage | _Kave. It was found that the liquid crystal composition had a sufficiently low / Δε |. On the other hand, it was found that Δn of LC-A was significantly smaller than that of LC-1.

Next, when a horizontally oriented liquid crystal display element and a vertically oriented liquid crystal display element were obtained using these liquid crystal compositions, it was confirmed that all of these liquid crystal display elements exhibited high-speed response and low drive voltage. However, the display element produced by using LC-A has a lower transmittance than the liquid crystal display element produced by using LC-1, and a remarkable decrease in contrast is observed accordingly.

From the above, it was found that the liquid crystal composition of the present invention is an excellent liquid crystal composition capable of achieving both high-speed response, low drive voltage, high transmittance, and high contrast.
(Comparative Example 2 and Example 2)
A liquid crystal composition of LC-B as a comparative example and LC-2 as an example was prepared, and its physical characteristics were measured. The composition of the liquid crystal composition and the results of its physical property values are shown below.

LC-2 (Example 2) and LC-B (Comparative Example 2) are parameters that govern the drive voltage | _Kave. It was found that the liquid crystal composition had a sufficiently low / Δε |. On the other hand, LC-B is a parameter governing drive voltage, response speed and contrast as compared with LC-2 _. It is small, γ ₁ / _{K ave} is a parameter governing the response _speed. Was found to be larger.

Next, when a horizontally oriented liquid crystal display element and a vertically oriented liquid crystal display element were obtained using these liquid crystal compositions, it was confirmed that all of these liquid crystal display elements exhibited a low drive voltage. However, it was found that the liquid crystal display element produced by using LC-B has a slower response speed and lower contrast than the liquid crystal display element produced by using LC-2.

From the above, it was found that the liquid crystal composition of the present invention is an excellent liquid crystal composition capable of achieving both high-speed response, low drive voltage, high transmittance, and high contrast.
(Examples 3, 4 and 5)
As an example, liquid crystal compositions of LC-3, LC-4 and LC-5 were prepared, and their physical property values were measured. The composition of the liquid crystal composition and the results of its physical property values are shown below.

From the above, it was found that the liquid crystal composition of the present invention is an excellent liquid crystal composition capable of achieving both high-speed response, low drive voltage, high transmittance, and high contrast in the liquid crystal display element.
(Examples 6, 7 and 8)
As an example, liquid crystal compositions of LC-6, LC-7 and LC-8 were prepared, and their physical characteristics were measured. The composition of the liquid crystal composition and the results of its physical property values are shown below.

From the above, it was found that the liquid crystal composition of the present invention is an excellent liquid crystal composition capable of achieving both high-speed response, low drive voltage, high transmittance, and high contrast in the liquid crystal display element.
(Examples 9 to 40)
To the prepared liquid crystal compositions LC-1 to LC8, the polymerizable compounds represented by XX-2, XX-5, XX-15 and M65 were added as polymerizable compounds, and the polymerizable compound-containing liquid crystal composition MLC was added. -1 to MLC-32 (Examples 9 to 40) were prepared.

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

A horizontally oriented liquid crystal display element and a vertically oriented liquid crystal display element were obtained using these polymerizable compound-containing liquid crystal compositions, and then UV treatment was performed to obtain a polymer-stabilized liquid crystal display element. It was confirmed that all of these polymer-stabilized liquid crystal display elements exhibited the same or better characteristics as the liquid crystal display elements produced in Examples 1 to 8.

From the above, it was found that the liquid crystal composition of the present invention is an excellent liquid crystal composition capable of achieving both high-speed response, low drive voltage, high transmittance, and high contrast even in a polymer liquid crystal display element.

Claims (3)

Equation (i)

Contains the compound represented by
Further general formula (N-1)

^(Wherein, independently ^{R N11} and ^{R N12} are each represents a linear alkyl group having 1 to 8 carbon atoms, one in the alkyl group or non-adjacent two or more -CH ₂ - is They may be independently substituted by −CH = CH−, −C≡C−, −O−, −CO−, −COO− or −OCO−, respectively.
n ^N11 and n ^N12 independently represent 0, 1, 2 or 3, while n ^N11 + n ^N12 represent 1, 2 or 3, respectively.
A ^N11 and A ^N12 are independent of each other.
(A) 1,4-cyclohexylene group, (this is present in the group one -CH ₂ - - or nonadjacent two or more -CH ₂ may be replaced by -O-.)
(B) 1,4-phenylene group (one -CH = existing in this group or two or more -CH = not adjacent to each other may be replaced with -N =) and (c). Naphthalene-2,6-diyl group, 1,2,3,4-tetrahydronaphthalene-2,6-diyl group or decahydronaphthalene-2,6-diyl group (naphthalene-2,6-diyl group or 1,2) , 3,4-Tetrahydronaphthalene-2,6-Diyl Group, one -CH = or two or more non-adjacent -CH = may be replaced with -N =).
Represents a group selected from the group consisting of, and the above groups (a), groups (b) and groups (c) are independently alkyl groups (one −CH ₂ − or adjacent to each other present in this group). Two or more -CH _2- that are not present may be replaced by -O-), an alkenyl group (one -CH _2- that is present in this group, or two or more -CHs that are not adjacent to each other. _2- may be replaced with −O−), may be substituted with a cyano group, a fluorine atom or a chlorine atom.
Z ^N11 and ^{Z N12} are each independently a single _{bond, -CH 2 CH 2 -, -} (CH 2) 4 -, -COO -, - OCO -, - OCF 2 -, - CF 2 O -, - CH = NN = CH-, -CH = CH-, -CF = CF- or -C≡C-
If there are multiple A ^N11 and / or A ^N12 , they may be the same or different, ^{and if there are multiple Z N11} and / or Z ^N12 , they may be the same or different. You may . ) As a compound
General formula (N-1-3)

^{(Wherein, R N131} and ^{R N132} each independently represents the same meaning as ^{R N11} and ^{R N12} in the general formula (N-1).)
Containing compound represented by,
General formula (N-1a)

^{(Wherein, R N11} and ^{R N12} are as defined ^{R N11} and ^{R N12} in the general formula ^{(N-1), n Na11} represents 0 or 1.)
Contains the compound represented by, and
It contains one or more of the compounds represented by the formulas (N-1-1.1), (N-1-2.4) and (N-1-2.7) as essential components.

As the compound represented by the general formula (N-1-3), a compound represented by the formula (N-1-3.1) and / or the formula (N-1-3.2) is contained as an essential component. And

As the compound represented by the general formula (N-1a), a compound represented by the formula (N-1-4.2) and / or the formula (N-1-5.2) is contained as an essential component.

Further equation (L-1-3.3)

Compound represented by,
Furthermore, the general formula (L)

(Wherein, independently each R ^L1 and R ^L2, an alkyl group having 1 to 8 carbon atoms, one or non-adjacent two or more -CH 2 in the alkyl group _- is independently It may be replaced by -CH = CH-, -C≡C-, -O-, -CO-, -COO- or -OCO-.
A ^{L1, A L2,} and ^{A L3} are each independently
(A) 1,4-cyclohexylene group, (this is present in the group one -CH ₂ - - or nonadjacent two or more -CH ₂ may be replaced by -O-.)
(B) A 1,4-phenylene group (one -CH = existing in this group or two or more -CH = not adjacent to each other may be replaced with -N =) and.
(C) Naphthalene-2,6-diyl group, 1,2,3,4-tetrahydronaphthalene-2,6-diyl group or decahydronaphthalene-2,6-diyl group (naphthalene-2,6-diyl group or One -CH = existing in the 1,2,3,4-tetrahydronaphthalene-2,6-diyl group or two or more non-adjacent -CH = may be replaced with -N =. )
Represents a group selected from the group consisting of, and the above groups (a), groups (b) and groups (c) are independently alkyl groups (one −CH ₂ − or adjacent to each other present in this group). Two or more -CH _2- that are not present may be replaced by -O-), an alkenyl group (one -CH _2- that is present in this group, or two or more -CHs that are not adjacent to each other. _2- may be replaced with −O−), may be substituted with a cyano group, a fluorine atom or a chlorine atom.
Z ^L1 and ^{Z L2} are each independently 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−
n ^L1 represents 0, 1, 2 or 3,
When ^{there are a plurality of A L2s} , they may be the same or different, and ^{when there are a plurality of Z L2s} , they may be the same or different, but in the formula (B31). The compounds represented and the compounds represented by the formula (L-1-3.3) are excluded. ) Is contained in one or more kinds, and as the compound represented by the general formula (L), the formula (L-1-1.3) and the formula (L-1-2.2) are used. And a liquid crystal composition containing at least one of the compounds represented by the formula (L-1-3.1) as an essential component (however, the liquid crystal composition containing the compound represented by the formula (B31) is excluded. ).

The liquid crystal composition according to claim 1, further containing a polymerizable compound selected from the following.

A liquid crystal display device using the liquid crystal composition according to claim 1 or 2.