JP5561437B1 - Liquid crystal composition and liquid crystal display device using the same - Google Patents

Abstract

A liquid crystal composition containing one or more compounds represented by the following general formula (i) and one or more compounds represented by the following general formula (ii) [Chemical Formula 1]

(In the formula, R ⁱ¹ , R ⁱ² and R ⁱⁱ¹ each independently represent an alkyl group having 1 to 8 carbon atoms, and one or two or more non-adjacent —CH 2 — in the alkyl group are each independent. May be substituted by —CH═CH—, —C≡C—, —O—, —CO—, —COO— or —OCO—, and m ⁱⁱ¹ represents 1 or 2, and X ^{i1 to} X ⁱ⁶ are each independently represent a hydrogen atom or a fluorine atom, at least one represents a fluorine atom, each X ⁱⁱ¹ and X ⁱⁱ² independently represent a hydrogen atom, a fluorine atom or a chlorine atom.

Description

  The present invention relates to a nematic liquid crystal composition having a positive dielectric anisotropy (Δε) useful as a liquid crystal display material, and a liquid crystal display device using the same.

  Liquid crystal display elements are used in various measuring instruments, automobile panels, word processors, electronic notebooks, printers, computers, televisions, watches, advertisement display boards, as well as watches and calculators. Typical liquid crystal display methods include TN (twisted nematic) type, STN (super twisted nematic) type, vertical alignment type using TFT (thin film transistor) and IPS (in-plane switching) type. Etc. The liquid crystal composition used in these liquid crystal display elements is stable against external stimuli such as moisture, air, heat, light, etc., and exhibits a liquid crystal phase in the widest possible temperature range centering on room temperature. And a low driving voltage is required. Further, the liquid crystal composition is composed of several to several tens of kinds of compounds in order to optimize the dielectric anisotropy (Δε) and / or the refractive index anisotropy (Δn) for each display element. Yes.

In a vertical alignment (VA) type display, a liquid crystal composition having a negative Δε is used, and in a horizontal alignment type display such as a TN type, STN type, or IPS (in-plane switching) type, a liquid crystal composition having a positive Δε. Is used. In addition, a driving method in which a liquid crystal composition having a positive Δε is vertically aligned when no voltage is applied and a horizontal electric field is applied for display has been reported, and the necessity of a liquid crystal composition having a positive Δε has further increased. Yes. On the other hand, low voltage driving, high-speed response, and a wide operating temperature range are required in all driving systems. That is, Δε is positive, the absolute value is large, the viscosity (η) is small, and a high nematic phase-isotropic liquid phase transition temperature (Tni) is required. In order to set Δn × d, which is the product of Δn and the cell gap (d), to a predetermined value, it is necessary to adjust Δn of the liquid crystal composition to an appropriate range according to the cell gap. In addition, when a liquid crystal display element is applied to a television or the like, since high-speed response is important, a liquid crystal composition having a low rotational viscosity (γ ₁ ) is required.

Examples of the structure of the liquid crystal composition aimed at high-speed response include, for example, a compound represented by the following formula (A-1) or the following formula (A-2) in which Δε is a positive liquid crystal compound, and Δε is neutral. A liquid crystal composition using a combination of compounds represented by the following formula (B), which is a liquid crystal compound, is disclosed. These liquid crystal compositions are characterized in that a liquid crystal compound having a positive Δε has a —CF ₂ O— structure, and a liquid crystal compound having a negative Δε has an alkenyl group. These characteristics are widely known in the field of this liquid crystal composition (see Patent Documents 1 to 4).

On the other hand, the use of liquid crystal display elements has been expanded, and there has been a significant change in the method of use and manufacturing method. In order to cope with these changes, it has become necessary to optimize characteristics other than the basic physical property values as conventionally known. That is, liquid crystal display elements using a liquid crystal composition are widely used, such as VA type and IPS type, and super large size display elements having a size of 50 type or more are put into practical use. It became so. As the substrate size has increased, the method of injecting the liquid crystal composition into the substrate has also changed, and the drop injection (ODF: One Drop Fill) method has become the main method of injection from the conventional vacuum injection method. However, the problem that the drop marks when the liquid crystal composition is dropped on the substrate causes the display quality to deteriorate has been brought to the surface. Furthermore, in the liquid crystal display element manufacturing process by the ODF method, it is necessary to drop an optimal amount of liquid crystal according to the size of the liquid crystal display element. When the drop amount deviation increases from the optimum value, the balance between the refractive index and the driving electric field of the liquid crystal display element designed in advance is lost, and display defects such as spots and poor contrast occur. In particular, small liquid crystal display elements frequently used in smartphones that have recently become popular are difficult to control the deviation from the optimal value within a certain range because the optimal liquid crystal dripping amount is small. Therefore, in order to maintain a high manufacturing yield of the liquid crystal display element, the liquid crystal composition is less affected by, for example, a sudden pressure change or impact in the dropping device that occurs when the liquid crystal is dropped, and is continuously stable over a long period of time. Therefore, it must be dripping.

As described above, in the liquid crystal composition used in the active matrix drive liquid crystal display element driven by the TFT element or the like, the conventional characteristics and performances required for the liquid crystal display element such as high-speed response performance are maintained, and importance is conventionally attached. In addition to the properties of high specific resistance, high voltage holding ratio, and stability against external stimuli such as light and heat, development in consideration of a method for manufacturing a liquid crystal display element has been demanded.

JP 2008-037918 A JP 2008-038018 A JP 2010-275390 A JP 2011-052120 A

  The problems to be solved by the present invention include a liquid crystal phase in a wide temperature range, low viscosity, good solubility at low temperatures, high specific resistance and high voltage holding ratio, and stability against heat and light. Provided is a liquid crystal composition having a positive Δε, which is capable of producing a liquid crystal display element having excellent display quality, which is less prone to display defects such as image sticking and dripping marks, and a liquid crystal composition using the liquid crystal composition. It is to provide a liquid crystal display device.

  The present inventors have studied various liquid crystal compounds and various chemical substances, and found that the above problems can be solved by combining specific liquid crystal compounds, and have completed the present invention. That is, the first aspect of the present invention is the following liquid crystal composition, and the second aspect of the present invention is the following liquid crystal element.

[1] A liquid crystal composition containing one or more compounds represented by the following general formula (i) and one or more compounds represented by the following general formula (ii).

(Wherein, R ⁱ¹ , R ⁱ² and R ⁱⁱ¹ each independently represents an alkyl group having 1 to 8 carbon atoms, and one or two or more non-adjacent —CH ₂ — in the alkyl group are each Independently may be substituted by —CH═CH—, —C≡C—, —O—, —CO—, —COO— or —OCO—, m ⁱⁱ¹ represents 1 or 2, and X ⁱ¹ to X ⁱ⁶ independently represents a hydrogen atom or a fluorine atom, but at least one represents a fluorine atom, and X ⁱⁱ¹ and X ⁱⁱ² each independently represent a hydrogen atom, a fluorine atom, or a chlorine atom.)

[2] The liquid crystal composition according to [1], wherein at least one of X ⁱⁱ¹ and X ⁱⁱ² in the general formula (ii) is a fluorine atom.
[3] The liquid crystal composition according to the above [1] or [2], which contains at least one compound in which R ⁱ¹ and R ⁱ² are different substituents as the compound represented by the general formula (i).
[4] The liquid crystal composition according to any one of [1] to [3], including a compound in which R ⁱⁱ¹ in the general formula (ii) is an ethyl group and a compound that is a propyl group.
[5] The liquid crystal composition according to any one of [1] to [4], including a compound represented by the following general formula (L).

(Wherein, R ^L1 and R ^L2 each independently represent an alkyl group having 1 to 8 carbon atoms, and one or two or more non-adjacent —CH ₂ — in the alkyl group are each independently May be substituted by —CH═CH—, —C≡C—, —O—, —CO—, —COO— or —OCO—,
OL represents 0, 1, 2 or 3;
B ^L1 , B ^L2 and B ^L3 each independently represent (a) a 1,4-cyclohexylene group (one —CH ₂ — present in this group or two or more —CH ₂ — not adjacent to each other). May be replaced by -O-) and (b) 1,4-phenylene group (one -CH = present in this group or two or more non-adjacent -CH = are -N May be replaced by =.)
Represents a group selected from the group consisting of: one or two or more hydrogen atoms in the above groups (a) and (b) are each independently substituted with a cyano group, a fluorine atom or a chlorine atom; Well,
L ^L1 and L ^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═N—N═CH—, —CH═CH—, —CF═CF— or —C≡C—,
When OL is 2 or 3 and a plurality of L ^L2 are present, they may be the same or different, and when OL is 2 or 3 and a plurality of B ^L3 is present, they are the same Or different. However, the compound represented by general formula (i) is excluded. )

[6] The liquid crystal composition according to any one of [1] to [5], including a compound represented by the following general formula (M).

(Wherein R ^M1 represents an alkyl group having 1 to 8 carbon atoms, and one or two or more non-adjacent —CH ₂ — in the alkyl group are each independently —CH═CH—, — Optionally substituted by C≡C—, —O—, —CO—, —COO— or —OCO—,
PM represents 0, 1, 2, 3 or 4;
C ^M1 and C ^M2 are each independently
(D) 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- or -S- And (e) a 1,4-phenylene group (one —CH═ present in this group or two or more —CH═ not adjacent to each other may be replaced by —N═).
A group selected from the group consisting of: wherein one or two or more hydrogen atoms in the group (d) and group (e) are each independently substituted with a cyano group, a fluorine atom or a chlorine atom; Well,
K ^M1 and K ^M2 are each independently a single bond, —CH ₂ CH ₂ —, — (CH ₂ ) ₄ —, —OCH ₂ —, —CH ₂ O—, —OCF ₂ —, —CF ₂ O—, -COO-, -OCO- or -C≡C-
When PM is 2, 3 or 4 and there are a plurality of K ^M1 , they may be the same or different, and when PM is 2, 3 or 4 and there are a plurality of C ^M2 They may be the same or different,
X ^M1 and X ^M3 each independently represent a hydrogen atom, a chlorine atom or a fluorine atom,
X ^M2 represents a hydrogen atom, a fluorine atom, a chlorine atom, a cyano group, a trifluoromethyl group, a fluoromethoxy group, a difluoromethoxy group, a trifluoromethoxy group, or a 2,2,2-trifluoroethyl group. However, the compound represented by general formula (ii) is excluded. )

[7] A liquid crystal display device using the liquid crystal composition according to any one of [1] to [6].
[8] A liquid crystal display element for IPS mode, OCB mode, ECB mode, VA mode, or FFS mode using the liquid crystal composition according to any one of [1] to [6].
[9] A liquid crystal display using the liquid crystal display element according to [7] or [8].

The liquid crystal composition having positive dielectric anisotropy of the present invention has a lower viscosity than before, has good solubility at low temperatures, and the specific resistance and voltage holding ratio are changed by heat and light. Is small. For this reason, the liquid crystal composition of the present invention has high practicality (applicability) to liquid crystal products, and an IPS type or FFS type liquid crystal display element using the liquid crystal composition can achieve a high-speed response. In addition, since the liquid crystal composition of the present invention can stably exhibit its performance even after the manufacturing process of the liquid crystal display element, display defects due to the manufacturing process are suppressed, and the liquid crystal display element can be manufactured with a high yield. So it is very useful.

It is sectional drawing of the liquid crystal display element of this invention. A substrate having 100 to 105 is referred to as a “back plane”, and a substrate having 200 to 205 is referred to as a “front plane”. It is a figure of the exposure process using the pattern for columnar spacer formation formed on a black matrix as a photomask pattern.

“%” In the following compositions means “% by mass” unless otherwise specified.

  The liquid crystal composition of the present invention contains one or more compounds represented by the following general formula (i) and one or more compounds represented by the following general formula (ii). Containing.

(In the formula, R ⁱ¹ , R ⁱ² and R ⁱⁱ¹ each independently represent an alkyl group having 1 to 8 carbon atoms, and one or two or more non-adjacent —CH 2 — in the alkyl group are each independent. May be substituted by —CH═CH—, —C≡C—, —O—, —CO—, —COO— or —OCO—, and m ⁱⁱ¹ represents 1 or 2, and X ^{i1 to} X ⁱ⁶ are each independently represent a hydrogen atom or a fluorine atom, at least one represents a fluorine atom, each X ⁱⁱ¹ and X ⁱⁱ² independently represent a hydrogen atom, a fluorine atom or a chlorine atom.)

<Compound represented by formula (i)>
In the general formula (i), R ⁱ¹ and R ⁱ² are each independently preferably an alkyl group having 1 to 8 carbon atoms or a linear alkenyl group having 2 to 8 carbon atoms, and 2 to 5 carbon atoms. Are preferably a straight-chain alkyl group or a straight-chain alkenyl group having 2 to 5 carbon atoms, and are preferably an ethyl group, a propyl group, a butyl group, a pentyl group or the following structure.

(In the formula, it shall be bonded to the ring structure at the right end.)
An alkenyl group is preferred when emphasizing improvement in response speed, and an alkyl group is preferred when emphasizing reliability such as voltage holding ratio when a liquid crystal composition is formed.
Moreover, it is preferable to contain at least one compound in which R ⁱ¹ and R ⁱ² are different substituents as the compound represented by the general formula (i).

In general formula (i), X ^{i1 to} X ⁱ⁶ each independently represents a hydrogen atom or a fluorine atom. The compound represented by the general formula (i) is preferably selected from the group represented by the general formula (IV).

(Expressed in the ^{formula, R 41} and ^{R 42} each independently represents an alkyl group having 1 to 5 carbon atoms, an alkoxy group or an alkenyl group having 2 to 5 carbon atoms of 1 to 5 carbon ^{atoms, X 41} and X ⁴² each independently represents a hydrogen atom or a fluorine atom.)

  Although there is no restriction | limiting in particular in the kind of compound which can be combined, It combines according to performance requested | required, such as solubility at low temperature, transition temperature, electrical reliability, birefringence. The kind of the compound used is, for example, one kind as one embodiment of the present invention. Or in another embodiment of the present invention, there are two types. Furthermore, in another embodiment of this invention, they are three types. Furthermore, in another embodiment of this invention, they are four types. Furthermore, in another embodiment of this invention, they are five types. Furthermore, in another embodiment of this invention, they are six or more types.

At least one of X ^{i1 to} X ⁱ⁶ in the general formula (i) is preferably a fluorine atom, and the compound represented by the general formula (IV) is represented by, for example, the general formula (IV-1). A compound selected from the group of compounds is preferred.

(In the formula, R ⁴³ and R ⁴⁴ each independently represents an alkyl group having 1 to 5 carbon atoms.)

  The content of the compound represented by the general formula (i) includes low-temperature solubility, transition temperature, electrical reliability, birefringence, process compatibility, dripping marks, image sticking, dielectric anisotropy, etc. It is necessary to adjust appropriately according to the required performance.

  The lower limit is preferably 1% with respect to the total mass of the liquid crystal composition of the present invention, preferably 2%, preferably 5%, preferably 8%, preferably 10%, and the upper limit is preferably 20%. , 18% is preferable, 15% is preferable, 13% is preferable, 8% is preferable, 5% is preferable, and when only one kind is used, the lower limit is preferably 1%, preferably 2%, the upper limit The value is preferably 10%, preferably 8%, preferably 5%, and when two or more types are used, the lower limit of the total content is preferably 5%, preferably 8%, preferably 10%. Preferably, the upper limit is preferably 20%, 18% is preferable, 15% is preferable, and 13% is preferable. Two types are preferably used when emphasizing the solubility of the liquid crystal composition, and two or three are used when the content is to be increased. Is preferably used. The content of the compound is, for example, 1 to 20% by mass in one embodiment with respect to the total mass of the liquid crystal composition of the present invention. Furthermore, in another embodiment of this invention, the said content is 2-10 mass%. Furthermore, in another embodiment of this invention, the said content is 2-8 mass%. Furthermore, in another embodiment of this invention, the said content is 2-5 mass%. Furthermore, in another embodiment of this invention, the said content is 8-20 mass%. Furthermore, in another embodiment of this invention, the said content is 10-18 mass%. Furthermore, in another embodiment of this invention, the said content is 10-15 mass%. Furthermore, in another embodiment of this invention, the said content is 10-13 mass%.

Furthermore, it is preferable that the compound represented by general formula (i) is a compound represented, for example by a formula (i-1) to a formula (i-9).

Although there is no restriction | limiting in particular in the kind of compound which can be combined, It is preferable to contain 1 type-3 types from these compounds. Moreover, since changing the side chain of the compound to be selected is also effective for solubility, for example, one type of the compound represented by formula (i-1) or (i-2), formula (i-4) or ( 1 type from the compound represented by i-5), 1 type from the compound represented by formula (i-6) or formula (i-7), represented by formula (i-8) or (i-9) It is preferable to select one compound from the compounds to be combined and combine them appropriately. Among these, it is preferable that the compound represented by Formula (i-1), Formula (i-4), and Formula (i-6) is included.
Moreover, when it contains only 1 type, it is preferable to select the compound represented by Formula (i-4), and when it contains 2 types, it is Formula (i-1) and (i-6). It is preferable to select a compound represented by formula (i-1), (i-4) and (i-6), and it is preferable to select a compound represented by formula (i-1).

  Furthermore, the compound represented by the general formula (IV-2) is preferably, for example, a compound represented by the formula (i-10) to the formula (i-17), and among them, the formula (i-11) It is preferable that it is a compound represented by these.

  Since the wide molecular weight distribution of the compound selected as the component of the liquid crystal composition is also effective for the solubility, for example, one type from the compound represented by formula (i-10) or (i-11), formula (i -12) or (i-13) one type from the compound represented by formula (i-14) or formula (i-15), one type from the compound represented by formula (i-16) or (i- It is preferable to select one compound from the compounds represented by 17) and combine them appropriately.

  In the liquid crystal composition of the present invention, the content of the compound represented by formula (i-13) is determined in consideration of solubility at low temperatures, transition temperature, electrical reliability, and the like. The total mass is preferably 3% by mass or more and 25% by mass or less, more preferably 5% by mass or more and 20% by mass or less, further preferably 5% by mass or more and 15% by mass or less, and more preferably 7% by mass or more and 10% by mass. % Or less is particularly preferable.

The composition of the present invention may contain only one of the compounds represented by the above formulas (i-1) to (i-9) or may contain two or more, but the required refraction. It is preferable to combine appropriately according to the rate anisotropy and the solubility at room temperature and below freezing point.
Care must be taken because the solubility is affected by the structure of the alkyl groups at both ends of the compound. A compound in which at least one is an ethyl group is preferable, and compounds represented by formulas (i-1) to (i-2) and formulas (i-4) to (i-7) are preferable. The compound selected from the compounds represented by formula (i-1) and formula (i-2) is preferably contained in an amount of 1% by mass to 15% by mass with respect to the total mass of the composition of the present invention. It is preferable to contain 10% by mass or more and 1% by mass of the compound selected from the compounds represented by formula (i-4) and formula (i-5) with respect to the total mass of the composition of the present invention. % To 15% by mass, preferably 3% to 10% by mass, and a compound selected from the compounds represented by formula (i-6) and formula (i-7), It is preferable to contain 1 to 15 mass% with respect to the total mass of the composition of this invention, It is preferable to contain 3 to 10 mass%, The compound represented by Formula (i-4) And a compound represented by formula (i-6) In that case, the total content thereof is preferably 5% by mass or more and 20% by mass or less based on the total mass of the composition of the present invention, and the compound represented by the formula (i-1) and the formula It is preferable that both of the compounds represented by (i-6) are included, and in that case, the total content thereof is preferably 5% by mass or more and 20% by mass or less with respect to the total mass of the composition of the present invention. , A compound represented by formula (i-1), a compound represented by formula (i-4), and a compound represented by formula (i-6) are preferably included. The content is preferably 10% by mass or more and 20% by mass or less with respect to the total mass of the composition of the present invention.

  Although there is no restriction | limiting in particular in the kind of compound which can be combined, It is preferable to contain 1 type-5 types from these compounds, It is more preferable to contain 1 type-4 types, It contains 1 type-3 types. It is particularly preferred. Further, since the wide molecular weight distribution of the compound to be selected is also effective for solubility, for example, one type of the compounds represented by formula (i-1) and formula (i-2), formula (i-4) and It is preferable to select one compound from the compounds represented by formula (i-5) and one compound from the compounds represented by formula (i-6) and formula (i-7), and to combine them appropriately.

  The content of the compound represented by the general formula (i) is preferably 3% by mass or more and 30% by mass or less, preferably 3% by mass or more and 25% by mass or less, and preferably 3% by mass or more with respect to the total amount of the composition. 20 mass% or less is more preferable.

<Compound represented by formula (ii)>
In the general formula (ii), R ⁱⁱ¹ is preferably an alkyl group having 1 to 8 carbon atoms or a linear alkenyl group having 1 to 8 carbon atoms, and a linear alkyl group having 2 to 5 carbon atoms or carbon. A straight-chain alkenyl group having 2 to 5 atoms is preferred, and an ethyl group, a propyl group, a butyl group, a pentyl group, or the following structure

(In the formula, it shall be bonded to the ring structure at the right end.)
Are preferable, and an ethyl group or a propyl group is preferable.
An alkenyl group is preferred when emphasizing improvement in response speed, and an alkyl group is preferred when emphasizing reliability such as voltage holding ratio when a liquid crystal composition is formed.
In the general formula (ii), m ⁱⁱ¹ is 1 or 2.
X ⁱⁱ¹ and X ⁱⁱ² are each independently a hydrogen atom, a fluorine atom or a chlorine atom, and it is preferable that at least one of X ⁱⁱ¹ and X ⁱⁱ² is a fluorine atom.
The compound represented by the general formula (ii) is preferably a compound represented by the following general formula.

^{(Wherein, R ii1} has the same meaning as ^{R ii1} in formula ^{(ii), X ii1} and ^{X ii2} are as defined ^{X ii1} in formula (ii).)

^{(Wherein, R ii1} has the same meaning as ^{R ii1} in formula ^{(ii), X ii1} and ^{X ii2} are as defined ^{X ii1} in formula (ii).)

  Examples of the compound represented by the general formula (ii-1) include the following compounds.

  Examples of the compound represented by the general formula (ii-2) include the following compounds.

Among the compounds, formulas (ii-1.9), (ii-1.10), (ii-1.17), (ii-1.18), (ii-2.1), (ii-2) .2), (ii-2.5), (ii-2.6), (ii-2.9) and (ii-2.10) are preferred, and the compounds represented by formula (ii-1.10) are preferred. ), (Ii-2.1), (ii-2.2), (ii-2.5) and (ii-2.6) are preferred.
In the composition of the present invention, the compound represented by the general formula (ii) may be used alone, but it is more preferable to use two or more compounds when importance is attached to compatibility with other compounds. It is preferable to use 2 or more types and 5 or less types of compounds represented by general formula (ii-1), and to use 2 or more types and 5 types or less of compounds represented by general formula (ii-2). It is also preferable to use a compound represented by the general formula (ii-1) and a compound represented by the general formula (ii-2) in combination.
The content of the compound represented by the general formula (ii) is preferably 1%, preferably 3%, preferably 5%, preferably 7% as a lower limit with respect to the total mass of the composition of the present invention. 9%, 10% is preferable, 12% is preferable, and the upper limit is preferably 25%, 20% is preferable, 18% is preferable, and 17% is preferable.

Although there is no restriction | limiting in particular in the kind of compound to combine, It is preferable to contain 1 type-4 types from these compounds, and it is more preferable to contain 1 type-3 types. In addition, the content of compounds having these structures must be adjusted with attention to solubility. When emphasizing the low-temperature stability of the liquid crystal composition (precipitation does not occur when the liquid crystal composition is cooled to a low temperature), it is preferable to use two or three kinds.
As a particularly preferable combination, it is preferable to combine a compound in which R ⁱⁱ¹ in the general formula (ii) is an ethyl group with a compound in which the propyl group is a compound. The compound represented by the formula (ii-2.5) and the formula (ii) The compound represented by -2.6) is preferably combined, and the compound represented by formula (ii-2.1) and the compound represented by formula (ii-2.6) are preferably combined. It is preferable to combine the compound represented by (ii-2.5), the compound represented by formula (ii-2.6), and the compound represented by formula (ii-2.2).
The content of the compound represented by the general formula (ii-2) is preferably 2% by mass or more and 40% by mass or less, and more preferably 3% by mass or more and 30% by mass or less with respect to the total mass of the composition of the present invention. 5 mass% or more and 25 mass% or less are more preferable, and 5 mass% or more and 20 mass% or less are more preferable.
The content of the compound is 1 to 25% by mass in one embodiment, 2 to 20% by mass in another embodiment, 4 to 18% by mass, 6 to 18% by mass, and 8 to 18 in still another embodiment. They are mass%, 10-18 mass%, and 12-18 mass%.

The liquid-crystal composition of this invention can also contain any 1 type, or 2 or more types among the compounds represented by general formula (L).
It is preferable to use a total of 4 or 5 types of the compound represented by the general formula (i) and the compound represented by the general formula (ii). When used in combination, a combination of compounds represented by the formulas (i-1), (i-6), (ii-2.5) and (ii-2.6) is preferred, and the formula (i- 4), a combination of compounds represented by (ii-2.2), (ii-2.5) and (ii-2.6) is preferred, and the compounds represented by formulas (i-1), (i-4), ( The combination of the compounds represented by i-6), (ii-2.1) and (ii-2.6) is preferred.
The content of the compound represented by the general formula (i) and the compound represented by the general formula (ii) is preferably 5% as a lower limit with respect to the total mass of the liquid crystal composition of the present invention, and 8% 10% is preferable, 12% is preferable, 14% is preferable, and the upper limit is preferably 40%, 35% is preferable, and 30% is preferable.

(Wherein, R ^L1 and R ^L2 each independently represent an alkyl group having 1 to 8 carbon atoms, and one or two or more non-adjacent —CH ₂ — in the alkyl group are each independently May be substituted by —CH═CH—, —C≡C—, —O—, —CO—, —COO— or —OCO—,
OL represents 0, 1, 2 or 3;
B ^L1 , B ^L2 and B ^L3 each independently represent (a) a 1,4-cyclohexylene group (one —CH ₂ — present in this group or two or more —CH ₂ — not adjacent to each other). May be replaced by -O-) and (b) 1,4-phenylene group (one -CH = present in this group or two or more non-adjacent -CH = are -N May be replaced by =.)
Represents a group selected from the group consisting of: one or two or more hydrogen atoms in the above groups (a) and (b) are each independently substituted with a cyano group, a fluorine atom or a chlorine atom; Well,
L ^L1 and L ^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═N—N═CH—, —CH═CH—, —CF═CF— or —C≡C—,
When OL is 2 or 3 and a plurality of L ^L2 are present, they may be the same or different, and when OL is 2 or 3 and a plurality of B ^L3 is present, they are the same Or different. However, the compound represented by general formula (i) is excluded. )
There are no particular restrictions on the types of compounds that can be combined, but they are used in appropriate combinations according to desired properties such as solubility at low temperatures, transition temperatures, electrical reliability, and birefringence. The kind of the compound used is, for example, one kind as one embodiment of the present invention. Or in another embodiment of the present invention, there are two types. In another embodiment of the present invention, there are three types. Furthermore, in another embodiment of this invention, they are four types. Furthermore, in another embodiment of this invention, they are five types. Furthermore, in another embodiment of the present invention, there are six types. Furthermore, in another embodiment of the present invention, there are seven types. Furthermore, in another embodiment of this invention, they are eight types. Furthermore, in another embodiment of the present invention, there are nine types. Furthermore, in another embodiment of this invention, it is ten or more types.

  In the liquid crystal 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 suitability, dripping marks, and burn-in. Therefore, it is necessary to appropriately adjust according to required performance such as dielectric anisotropy.

  The content of the compound with respect to the total mass of the liquid crystal composition of the present invention is, for example, 1 to 95% by mass in one embodiment of the present invention. Alternatively, in another embodiment of the present invention, the content is 10% to 95% by mass. In still another embodiment of the present invention, the content is 20% to 95% by mass. Furthermore, in another embodiment of this invention, the said content is 30-95 mass%. Furthermore, in another embodiment of this invention, the said content is 40-95 mass%. In still another embodiment of the present invention, the content is 50% to 95% by mass. In still another embodiment of the present invention, the content is 55% to 95% by mass. Furthermore, in another embodiment of this invention, the said content is 60-95 mass%. Furthermore, in another embodiment of this invention, the said content is 65-95 mass%. Furthermore, in another embodiment of this invention, the said content is 70-95 mass%. Furthermore, in another embodiment of this invention, the said content is 75-95 mass%. Furthermore, in another embodiment of this invention, the said content is 80-95 mass%.

  Furthermore, with respect to the total mass of the liquid crystal composition of the present invention, the content of the compound is, for example, 1 to 95% in one embodiment of the present invention. In still another embodiment of the present invention, the content is 1% to 85%. In still another embodiment of the present invention, the content is 1% to 75%. In still another embodiment of the present invention, the content is 1% to 65%. In still another embodiment of the present invention, the content is 1% to 55%. In still another embodiment of the present invention, the content is 1% to 45%. In still another embodiment of the present invention, the content is 1% to 35%. In still another embodiment of the present invention, the content is 1% to 25%.

  When the liquid crystal composition of the present invention has a low viscosity and a liquid crystal composition having a high response speed is required, the above lower limit value is preferably high and the upper limit value is preferably high. Furthermore, when the liquid crystal composition of the present invention maintains a high Tni and a liquid crystal composition with good temperature stability is required, the above lower limit value is preferably high and the upper limit value is high. Further, when it is desired to increase the dielectric anisotropy in order to keep the driving voltage low, it is preferable that the above lower limit value is lowered and the upper limit value is low.

R ^L1 and R ^L2 are a linear alkyl group having 1 to 5 carbon atoms or a linear alkyl group having 1 to 4 carbon atoms when the ring structure to which R ^L1 is bonded is a phenyl group (aromatic). (Or more) alkoxy groups and alkenyl groups having 4 to 5 carbon atoms are preferred, and when the ring structure to which they are bonded is a saturated ring structure such as cyclohexane, pyran and dioxane, a linear carbon atom An alkyl group having 1 to 5 carbon atoms, a linear alkoxy group having 1 to 4 (or more) carbon atoms, and a linear alkenyl group having 2 to 5 carbon atoms are preferable.

The compound represented by the general formula (L) preferably has no chlorine atom in the molecule when chemical stability of the liquid crystal composition is required.
The compound represented by general formula (L) is preferably, for example, a compound selected from the group of compounds represented by general formula (I).

^{(Wherein, R 11} and ^{R 12} are independently an alkyl group having 1 to 5 carbon atoms, an alkoxy group or an alkenyl group having 2 to 5 carbon atoms of 1 to 5 carbon ^{atoms, A 11} and A ¹² each independently represents a 1,4-cyclohexylene group, a 1,4-phenylene group, a 2-fluoro-1,4-phenylene group or a 3-fluoro-1,4-phenylene group.

  There are no particular restrictions on the types of compounds that can be combined, but they are used in appropriate combinations according to the required properties such as solubility at low temperatures, transition temperatures, electrical reliability, and birefringence. The kind of the compound used is, for example, one kind as one embodiment of the present invention. Or in another embodiment of the present invention, there are two types. In another embodiment of the present invention, there are three types. Furthermore, in another embodiment of this invention, they are four types. Furthermore, in another embodiment of this invention, they are five types. Furthermore, in another embodiment of this invention, they are six or more types.

  In the liquid crystal composition of the present invention, the content of the compound represented by the general formula (I) is low temperature solubility, transition temperature, electrical reliability, birefringence, process suitability, dripping marks, image sticking. Therefore, it is necessary to appropriately adjust according to required performance such as dielectric anisotropy.

  The content of the compound with respect to the total mass of the liquid crystal composition of the present invention is, for example, 3 to 75% by mass in one embodiment of the present invention. Alternatively, in another embodiment of the present invention, the content is 15% to 75% by mass. In still another embodiment of the present invention, the content is 18% to 75% by mass. Furthermore, in another embodiment of this invention, the said content is 20-75 mass%. Furthermore, in another embodiment of this invention, the said content is 29-75 mass%. Furthermore, in another embodiment of this invention, the said content is 35-75 mass%. Furthermore, in another embodiment of this invention, the said content is 42-75 mass%. Furthermore, in another embodiment of this invention, the said content is 47-75 mass%. In still another embodiment of the present invention, the content is 53% to 75% by mass. Furthermore, in another embodiment of this invention, the said content is 56-75 mass%. Furthermore, in another embodiment of this invention, the said content is 60-75 mass%. Furthermore, in another embodiment of this invention, the said content is 65-75 mass%.

  Furthermore, with respect to the total mass of the liquid crystal composition of the present invention, the content is, for example, 3 to 75% by mass in one embodiment of the present invention. In still another embodiment of the present invention, the content is 3% to 65% by mass. In still another embodiment of the present invention, the content is 3% to 55% by mass. In still another embodiment of the present invention, the content is 3% to 50% by mass. Furthermore, in another embodiment of this invention, the said content is 3-45 mass%. Furthermore, in another embodiment of this invention, the said content is 3-40 mass%. In still another embodiment of the present invention, the content is 3% to 35% by mass. Furthermore, in another embodiment of this invention, the said content is 3-30 mass%.

  When the liquid crystal composition of the present invention has a low viscosity and a liquid crystal composition having a high response speed is required, the above lower limit value is preferably high and the upper limit value is preferably high. Furthermore, when the liquid crystal composition of the present invention maintains a high Tni and a liquid crystal composition with good temperature stability is required, it is preferable that the above lower limit value is medium and the upper limit value is medium. Further, when it is desired to increase the dielectric anisotropy in order to keep the driving voltage low, it is preferable that the above lower limit value is lowered and the upper limit value is low.

  Furthermore, it is preferable that the compound represented by general formula (I) is a compound chosen from the compound group represented by general formula (I-1).

(Wherein R ¹¹ and R ¹² each independently represents an alkyl group having 1 to 5 carbon atoms, an alkoxy group having 1 to 5 carbon atoms, or an alkenyl group having 2 to 5 carbon atoms.)
There are no particular restrictions on the types of compounds that can be combined, but they are used in appropriate combinations according to the required properties such as solubility at low temperatures, transition temperatures, electrical reliability, and birefringence. The kind of the compound used is, for example, one kind as one embodiment of the present invention. Or in another embodiment of the present invention, there are two types. In another embodiment of the present invention, there are three types. Furthermore, in another embodiment of this invention, they are four types. Furthermore, in another embodiment of this invention, they are five or more types.

  In the liquid crystal composition of the present invention, the content of the compound represented by the general formula (I-1) is the solubility at a low temperature, the transition temperature, the electrical reliability, the birefringence, the process suitability, the dropping trace. Therefore, it is necessary to adjust appropriately according to required performance such as image sticking and dielectric anisotropy.

  For example, in one embodiment of the present invention, the content of the compound is 3 to 70% by mass with respect to the total mass of the liquid crystal composition of the present invention. Or in another embodiment of this invention, the said content is 15-70 mass%. In still another embodiment of the present invention, the content is 18% to 70% by mass. Furthermore, in another embodiment of this invention, the said content is 25-70 mass%. Furthermore, in another embodiment of this invention, the said content is 29-70 mass%. Furthermore, in another embodiment of this invention, the said content is 31-70 mass%. Furthermore, in another embodiment of this invention, the said content is 35-70 mass%. Furthermore, in another embodiment of this invention, the said content is 43-70 mass%. Furthermore, in another embodiment of this invention, the said content is 47-70 mass%. Furthermore, in another embodiment of this invention, the said content is 50-70 mass%. Furthermore, in another embodiment of this invention, the said content is 53-70 mass%. Furthermore, in another embodiment of this invention, the said content is 56-70 mass%.

  With respect to the total mass of the liquid crystal composition of the present invention, the content of the compound is, for example, 3 to 70% by mass in one embodiment of the present invention. In still another embodiment of the present invention, the content is 3% to 60% by mass. In still another embodiment of the present invention, the content is 3% to 50% by mass. Furthermore, in another embodiment of this invention, the said content is 3-45 mass%. Furthermore, in another embodiment of this invention, the said content is 3-40 mass%. In still another embodiment of the present invention, the content is 3% to 35% by mass. Furthermore, in another embodiment of this invention, the said content is 3-30 mass%. In still another embodiment of the present invention, the content is 3% to 26% by mass.

  When the liquid crystal composition of the present invention has a low viscosity and a liquid crystal composition having a high response speed is required, the above lower limit value is preferably high and the upper limit value is preferably high. Furthermore, when the liquid crystal composition of the present invention maintains a high Tni and a liquid crystal composition with good temperature stability is required, it is preferable that the above lower limit value is medium and the upper limit value is medium. Further, when it is desired to increase the dielectric anisotropy in order to keep the driving voltage low, it is preferable that the above lower limit value is lowered and the upper limit value is low.

  Furthermore, it is preferable that the compound represented by general formula (I-1) is a compound chosen from the compound group represented by general formula (I-1-1).

(In the formula, each R ¹² independently represents an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms, or an alkoxy group having 1 to 5 carbon atoms.)

  In the liquid crystal composition of the present invention, the content of the compound represented by the general formula (I-1-1) includes solubility at low temperatures, transition temperature, electrical reliability, birefringence, process suitability, It is necessary to adjust appropriately according to required performance such as dripping marks, image sticking, and dielectric anisotropy.

For example, in one embodiment of the present invention, the content of the compound is 2 to 60% by mass with respect to the total mass of the liquid crystal composition of the present invention. Or in another embodiment of this invention, the said content is 4-60 mass%. In still another embodiment of the present invention, the content is 7% to 60% by mass. Furthermore, in another embodiment of this invention, the said content is 11-60 mass%. Furthermore, in another embodiment of this invention, the said content is 13-60 mass%. Furthermore, in another embodiment of this invention, the said content is 15-60 mass%. Furthermore, in another embodiment of this invention, the said content is 17-60 mass%. Furthermore, in another embodiment of this invention, the said content is 20-60 mass%. Furthermore, in another embodiment of this invention, the said content is 25-60 mass%. Furthermore, in another embodiment of this invention, the said content is 30-60 mass%. Furthermore, in another embodiment of this invention, the said content is 32-60 mass%. Furthermore, in another embodiment of this invention, the said content is 35-60 mass%.

For example, in one embodiment of the present invention, the content of the compound is 2 to 60% by mass with respect to the total mass of the liquid crystal composition of the present invention. In still another embodiment of the present invention, the content is 2% to 50% by mass. Furthermore, in another embodiment of this invention, the said content is 2-40 mass%. In still another embodiment of the present invention, the content is 2% to 35% by mass. Furthermore, in another embodiment of this invention, the said content is 2-30 mass%. In still another embodiment of the present invention, the content is 2% to 25% by mass. Furthermore, in another embodiment of this invention, the said content is 2-20 mass%. Furthermore, in another embodiment of this invention, the said content is 2-15 mass%.

  Furthermore, the compound represented by the general formula (I-1-1) is preferably a compound selected from the group of compounds represented by the formula (1.1) to the formula (1.3). .2) or a compound represented by formula (1.3) is preferred, and a compound represented by formula (1.3) is particularly preferred.

  When the compound represented by formula (1.2) or formula (1.3) is used alone, the content of the compound represented by formula (1.2) is high. The content of the compound represented by the formula (1.3) has the effect of improvement, and the range shown below is preferable because a liquid crystal composition having high response speed and high electrical and optical reliability can be obtained.

  The compound represented by the formula (1.3) is preferably contained in an amount of 5% by mass or more and 35% by mass or less, and preferably 7% by mass or more and 25% by mass or less based on the total mass of the liquid crystal composition of the present invention. Is more preferable, and it is still more preferable to contain 8 to 20 mass%.

  Furthermore, it is preferable that the compound represented by general formula (I-1) is a compound chosen from the compound group represented by general formula (I-1-2).

(In the formula, each R ¹² independently represents an alkyl group having 1 to 5 carbon atoms, an alkoxy group having 1 to 5 carbon atoms, or an alkenyl group having 2 to 5 carbon atoms.)

  There are no particular restrictions on the types of compounds that can be combined, but they are used in appropriate combinations according to the required properties such as solubility at low temperatures, transition temperatures, electrical reliability, and birefringence. The kind of the compound used is, for example, one kind as one embodiment of the present invention. Or in another embodiment of the present invention, there are two types. In another embodiment of the present invention, there are three types.

  In the liquid crystal composition of the present invention, the content of the compound represented by the general formula (I-1-2) is low temperature solubility, transition temperature, electrical reliability, birefringence, process suitability, It is necessary to adjust appropriately according to required performance such as dripping marks, image sticking, and dielectric anisotropy.

The content of the compound is, for example, 7 to 60% by mass in one embodiment of the present invention with respect to the total mass of the liquid crystal composition of the present invention. Or in another embodiment of this invention, the said content is 15-60 mass%. In still another embodiment of the present invention, the content is 18% to 60% by mass. Furthermore, in another embodiment of this invention, the said content is 21-60 mass%. Furthermore, in another embodiment of this invention, the said content is 24-60 mass%. Furthermore, in another embodiment of this invention, the said content is 27-60 mass%. Furthermore, in another embodiment of this invention, the said content is 30-60 mass%. Furthermore, in another embodiment of this invention, the said content is 34-60 mass%. Furthermore, in another embodiment of this invention, the said content is 37-60 mass%. Furthermore, in another embodiment of this invention, the said content is 41-60 mass%. Furthermore, in another embodiment of this invention, the said content is 47-60 mass%. Furthermore, in another embodiment of this invention, the said content is 50-60 mass%.

  Furthermore, with respect to the total mass of the liquid crystal composition of the present invention, the content of the compound is, for example, 7 to 60% by mass in one embodiment of the present invention. In still another embodiment of the present invention, the content is 7% to 55% by mass. Furthermore, in another embodiment of this invention, the said content is 7-45 mass%. Furthermore, in another embodiment of this invention, the said content is 7-40 mass%. Furthermore, in another embodiment of this invention, the said content is 7-35 mass%. Furthermore, in another embodiment of this invention, the said content is 7-30 mass%. Furthermore, in another embodiment of this invention, the said content is 7-25 mass%. Furthermore, in another embodiment of this invention, the said content is 7-20 mass%.

  Furthermore, the compound represented by the general formula (I-1-2) is preferably a compound selected from the group of compounds represented by the formula (2.1) to the formula (2.4). .2) to the compound represented by formula (2.4). In particular, the compound represented by the formula (2.2) is preferable because the response speed of the liquid crystal composition of the present invention is particularly improved. Moreover, when calculating | requiring Tni higher than a response speed, it is preferable to use the compound represented by Formula (2.3) or Formula (2.4). The content of the compounds represented by formula (2.3) and formula (2.4) is not preferably 20% or more in order to improve the solubility at low temperatures.

  In the liquid crystal composition of the present invention, the content of the compound represented by the formula (2.2) is preferably 5% by mass or more and 55% by mass or less with respect to the total mass of the liquid crystal composition of the present invention. More preferable examples of the content include 10% by mass to 50% by mass, 14% by mass to 47% by mass, 17% by mass to 47% by mass, 19% by mass to 47% by mass, 22% by mass to 47% by mass. % Or less, 25 mass% or more and 47 mass% or less, 27 mass% or more and 47 mass% or less, 30 mass% or more and 47 mass% or less.

In the liquid crystal composition of the present invention, the content of the compound represented by the formula (2.3) is preferably 5% by mass to 55% by mass with respect to the total mass of the liquid crystal composition of the present invention. More preferably, it is 10 mass% and 45 mass% or less, More preferably, it is 10 mass% or more and 35 mass% or less, More preferably, it is 10 mass% or more and 30 mass% or less, 10 mass% or more and 25 mass% or less % Or less, more preferably 15% by mass or more and 25% by mass or less, and particularly preferably 17% by mass or more and 22% by mass or less.

In the liquid crystal composition of the present invention, the content of the compound represented by the formula (2.4) is preferably 1% by mass or more and 55% by mass or less with respect to the total mass of the liquid crystal composition of the present invention. 3% by mass to 45% by mass is more preferable, 3% by mass to 35% by mass is more preferable, 3% by mass to 25% by mass is more preferable, and 3% by mass to 15% by mass. % Is more preferably 5% by mass or more and 12% by mass or less, further preferably 5% by mass or more and 10% by mass or less, and 6% by mass or more and 8% by mass or less. Is particularly preferred.

  The liquid crystal composition of the present invention may further contain a compound represented by the formula (2.5) having a structure similar to that of the compound represented by the general formula (I-1-2).

  It is preferable to adjust the content of the compound represented by the formula (2.5) according to the required performance such as solubility at low temperature, transition temperature, electrical reliability, and birefringence. It is preferable to contain 11 mass% or more with respect to the total mass of the liquid crystal composition of the invention, more preferably 15 mass%, further preferably 23 mass%, and further preferably 26 mass% or more. The content is preferably 28% by mass or more.

  Furthermore, it is preferable that the compound represented by general formula (I) is a compound chosen from the compound group represented by general formula (I-2).

(In the formula, R ¹³ and R ¹⁴ each independently represents an alkyl group having 1 to 5 carbon atoms.)

  Although there is no restriction | limiting in particular in the kind of compound which can be combined, It combines according to performance requested | required, such as solubility at low temperature, transition temperature, electrical reliability, birefringence. The kind of the compound used is, for example, one kind as one embodiment of the present invention. Or in another embodiment of the present invention, there are two types. In another embodiment of the present invention, there are three types.

  In the liquid crystal composition of the present invention, the content of the compound represented by the general formula (I-2) is low temperature solubility, transition temperature, electrical reliability, birefringence index, process suitability, dropping trace. Therefore, it is necessary to adjust appropriately according to required performance such as image sticking and dielectric anisotropy.

For example, in one embodiment of the present invention, the content of the compound is 3 to 60% by mass with respect to the total mass of the liquid crystal composition of the present invention. Or in another embodiment of this invention, the said content is 4-60 mass%. Moreover, in another embodiment of this invention, the said content is 15-60 mass%. Furthermore, in another embodiment of this invention, the said content is 25-60 mass%. Furthermore, in another embodiment of this invention, the said content is 30-60 mass%. Furthermore, in another embodiment of this invention, the said content is 35-60 mass%. Furthermore, in another embodiment of this invention, the said content is 38-60 mass%. Furthermore, in another embodiment of this invention, the said content is 40-60 mass%. Furthermore, in another embodiment of this invention, the said content is 42-60 mass%. Furthermore, in another embodiment of this invention, the said content is 45-60 mass%. Furthermore, in another embodiment of this invention, the said content is 47-60 mass%. Furthermore, in another embodiment of this invention, the said content is 50-60 mass%.

  Furthermore, with respect to the total mass of the liquid crystal composition of the present invention, the content of the compound is, for example, 3 to 60% by mass in one embodiment of the present invention. In still another embodiment of the present invention, the content is 3% to 55% by mass. Furthermore, in another embodiment of this invention, the said content is 3-45 mass%. Furthermore, in another embodiment of this invention, the said content is 3-40 mass%. Furthermore, in another embodiment of this invention, the said content is 3-30 mass%. Furthermore, in another embodiment of this invention, the said content is 3-20 mass%. Furthermore, in another embodiment of this invention, the said content is 3-15 mass%. Furthermore, in another embodiment of this invention, the said content is 3-5 mass%.

Furthermore, it is preferable that the compound represented by general formula (I-2) is a compound chosen from the compound group represented by Formula (3.1) to Formula (3.4), and Formula (3.1). ), A compound represented by formula (3.3) or formula (3.4). In particular, the compound represented by the formula (3.2) is preferable because the response speed of the liquid crystal composition of the present invention is particularly improved. Moreover, when calculating | requiring Tni higher than a response speed, it is preferable to use the compound represented by Formula (3.3) or Formula (3.4). The content of the compounds represented by the formulas (3.3) and (3.4) is not preferably 20% or more in order to improve the solubility at low temperatures.

  Furthermore, it is preferable that the compound represented by general formula (I-2) is a compound chosen from the compound group represented by Formula (3.1) to Formula (3.4), and Formula (3.1). ), A compound represented by formula (3.3) and / or formula (3.4).

  In the liquid crystal composition of the present invention, the content of the compound represented by the formula (3.3) is preferably 2% by mass or more and 40% by mass or less with respect to the total mass of the liquid crystal composition of the present invention. More preferable content is, for example, 3% to 40% by mass, 4% to 40% by mass, 10% to 40% by mass, 12% to 40% by mass, 14% to 40% by mass. % By mass or less, 16% by mass to 40% by mass, 20% by mass to 40% by mass, 23% by mass to 40% by mass, 26% by mass to 40% by mass, 30% by mass to 40% by mass, 34 % By mass to 40% by mass, 37% by mass to 40% by mass, or 3% by mass to 4% by mass, 3% by mass to 10% by mass, 3% by mass to 12% by mass, 3% by mass or more 14 mass% or less, 3 mass% or more and 16 mass% or less, 3 mass% or more and 20 mass% or less, 3 mass% or more and 23 mass% or less, 3 mass% or more and 26 mass% or less, 3 mass% or more and 30 mass% or less, 3% by mass or more 34 The amount percent include 37 wt% or less 3 wt% or more.

  Furthermore, it is preferable that the compound represented by general formula (I) is a compound chosen from the compound group represented by general formula (I-3).

(In the formula, R ¹³ represents an alkyl group having 1 to 5 carbon atoms, and R ¹⁵ represents an alkoxy group having 1 to 4 carbon atoms.)

  Although there is no restriction | limiting in particular in the kind of compound which can be combined, It combines according to performance requested | required, such as solubility at low temperature, transition temperature, electrical reliability, birefringence. The kind of the compound used is, for example, one kind as one embodiment of the present invention. Or in another embodiment of the present invention, there are two types. In another embodiment of the present invention, there are three types.

  In the liquid crystal composition of the present invention, the content of the compound represented by the general formula (I-3) is the solubility at a low temperature, the transition temperature, the electrical reliability, the birefringence, the process suitability, the dropping trace. Therefore, it is necessary to adjust appropriately according to required performance such as image sticking and dielectric anisotropy.

For example, in one embodiment of the present invention, the content of the compound is 3% by mass with respect to the total mass of the liquid crystal composition of the present invention. Or in another embodiment of this invention, the said content is 4-60 mass%. Moreover, in another embodiment of this invention, the said content is 15-60 mass%. Furthermore, in another embodiment of this invention, the said content is 25-60 mass%. Furthermore, in another embodiment of this invention, the said content is 30-60 mass%. Furthermore, in another embodiment of this invention, the said content is 35-60 mass%. Furthermore, in another embodiment of this invention, the said content is 38-60 mass%. Furthermore, in another embodiment of this invention, the said content is 40-60 mass%. Furthermore, in another embodiment of this invention, the said content is 42-60 mass%. Furthermore, in another embodiment of this invention, the said content is 45-60 mass%. Furthermore, in another embodiment of this invention, the said content is 47-60 mass%. Furthermore, in another embodiment of this invention, the said content is 50-60 mass%.

  Furthermore, with respect to the total mass of the liquid crystal composition of the present invention, the content of the compound is, for example, 3 to 60% by mass in one form of the present invention. In still another embodiment of the present invention, the content is 3% to 55% by mass. Furthermore, in another embodiment of this invention, the said content is 3-45 mass%. Furthermore, in another embodiment of this invention, the said content is 3-40 mass%. Furthermore, in another embodiment of this invention, the said content is 3-30 mass%. Furthermore, in another embodiment of this invention, the said content is 3-20 mass%. Furthermore, in another embodiment of this invention, the said content is 3-15 mass%. Furthermore, in another embodiment of this invention, the said content is 3-5 mass%.

  When emphasizing solubility at low temperatures, the effect is high when the content is set to be large. On the other hand, when the response speed is important, the effect is high when the content is set low. Furthermore, when improving dripping marks and image sticking characteristics, it is preferable to set the content range in the middle.

  Furthermore, the compound represented by the general formula (I-3) is preferably a compound selected from the group of compounds represented by the formula (4.1) to the formula (4.3). It is preferable that it is a compound represented by this.

  The content of the compound represented by the formula (4.3) is preferably 2% by mass to 30% by mass with respect to the total mass of the liquid crystal composition of the present invention, and is preferably 4% by mass to 30% by mass. More preferably, it is 6 to 30% by mass, more preferably 8 to 30% by mass, and more preferably 10 to 30% by mass. Preferably, it is 12 mass% or more and 30 mass% or less, More preferably, it is 14 mass% or more and 30 mass% or less, It is more preferable that it is 16 mass% or more and 30 mass% or less, 18 mass% The content is more preferably 25% by mass or less, more preferably 20% by mass or more and 24% by mass or less, and particularly preferably 22% by mass or more and 23% by mass or less.

  Furthermore, it is preferable that the compound represented by general formula (I) is a compound chosen from the compound group represented by general formula (I-4).

(In the formula, R ¹¹ and R ¹² each independently represents an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 4 to 5 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms.)

Although there is no restriction | limiting in particular in the kind of compound which can be combined, It combines according to performance requested | required, such as solubility at low temperature, transition temperature, electrical reliability, birefringence. The kind of the compound used is, for example, one kind as one embodiment of the present invention. Or in another embodiment of the present invention, there are two types.

  In the liquid crystal composition of the present invention, the content of the compound represented by the general formula (I-4) is the solubility at a low temperature, the transition temperature, the electrical reliability, the birefringence, the process suitability, and the dropping trace. Therefore, it is necessary to adjust appropriately according to required performance such as image sticking and dielectric anisotropy.

For example, in one embodiment of the present invention, the content of the compound is 3 to 50% by mass with respect to the total mass of the liquid crystal composition of the present invention. Or in another embodiment of this invention, the said content is 5-50 mass%. In still another embodiment of the present invention, the content is 6% to 50% by mass. Furthermore, in another embodiment of this invention, the said content is 8-50 mass%. Furthermore, in another embodiment of this invention, the said content is 10-50 mass%. Furthermore, in another embodiment of this invention, the said content is 12-50 mass%. Furthermore, in another embodiment of this invention, the said content is 15-50 mass%. Furthermore, in another embodiment of this invention, the said content is 20-50 mass%. Furthermore, in another embodiment of this invention, the said content is 25-50 mass%. Furthermore, in another embodiment of this invention, the said content is 30-50 mass%. Furthermore, in another embodiment of this invention, the said content is 35-50 mass%. Furthermore, in another embodiment of this invention, the said content is 40-50 mass%.

  Furthermore, with respect to the total mass of the liquid crystal composition of the present invention, the content of the compound is, for example, 3 to 50% by mass in one embodiment of the present invention. In still another embodiment of the present invention, the content is 3% to 40% by mass. In still another embodiment of the present invention, the content is 3% to 35% by mass. Furthermore, in another embodiment of this invention, the said content is 3-30 mass%. Furthermore, in another embodiment of this invention, the said content is 3-20 mass%. Furthermore, in another embodiment of this invention, the said content is 3-15 mass%. Furthermore, in another embodiment of this invention, the said content is 3-10 mass%. Furthermore, in another embodiment of this invention, the said content is 3-5 mass%.

  When a high birefringence is obtained, the effect is high when the content is set to be large. On the other hand, when high Tni is emphasized, the effect is high when the content is set low. Furthermore, when improving dripping marks and image sticking characteristics, it is preferable to set the content range in the middle.

  Furthermore, the compound represented by General Formula (I-4) is preferably a compound selected from the group of compounds represented by Formula (5.1) to Formula (5.4), and Formula (5.2) ) To the compound represented by formula (5.4).

  The content of the compound represented by the formula (5.4) is preferably 2% by mass or more and 30% by mass or less with respect to the total mass of the liquid crystal composition of the present invention. More preferable content is, for example, 4% by mass to 30% by mass, 6% by mass to 30% by mass, 8% by mass to 30% by mass, 10% by mass to 30% by mass, 12% by mass to 30% by mass. % Or less, 14% to 30% by mass, 16% to 30% by mass, 18% to 30% by mass, 20% to 30% by mass, 22% to 30% by mass, 23% % To 30% by mass, 24% to 30% by mass, 25% to 30% by mass, 4% to 6% by mass, 4% to 8% by mass, 4% to 10% 4% or more, 14% or less, 4% or more, 16% or less, 4% or more, 18% or less, 4% or more, 20% or less, 4% or more, 4% or more, 22% by mass or more Hereinafter, 4 wt% to 23 wt% or less, 4% or more 24 wt% or less, 4% or more and 25 mass% or less, and the like.

  Furthermore, it is preferable that the compound represented by general formula (I) is a compound chosen from the compound group represented by general formula (I-5).

(In the formula, R ¹¹ and R ¹² each independently represents an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms.)

  Although there is no restriction | limiting in particular in the kind of compound which can be combined, It combines according to performance requested | required, such as solubility at low temperature, transition temperature, electrical reliability, birefringence. The kind of the compound used is, for example, one kind as one embodiment of the present invention. Or in another embodiment of the present invention, there are two types.

  In the liquid crystal composition of the present invention, the content of the compound represented by the general formula (I-5) is low temperature solubility, transition temperature, electrical reliability, birefringence index, process suitability, dropping trace. Therefore, it is necessary to adjust appropriately according to required performance such as image sticking and dielectric anisotropy.

The content of the compound with respect to the total mass of the liquid crystal composition of the present invention is, for example, 1 to 50% by mass in one embodiment of the present invention. Or in another embodiment of this invention, the said content is 5-50 mass%. In still another embodiment of the present invention, the content is 8% to 50% by mass. Furthermore, in another embodiment of this invention, the said content is 11-50 mass%. Furthermore, in another embodiment of this invention, the said content is 13-50 mass%. Furthermore, in another embodiment of this invention, the said content is 15-50 mass%. Furthermore, in another embodiment of this invention, the said content is 17-50 mass%. Furthermore, in another embodiment of this invention, the said content is 20-50 mass%. Furthermore, in another embodiment of this invention, the said content is 25-50 mass%. Furthermore, in another embodiment of this invention, the said content is 30-50 mass%. Furthermore, in another embodiment of this invention, the said content is 35-50 mass%. Furthermore, in another embodiment of this invention, the said content is 40-50 mass%.

  Furthermore, with respect to the total mass of the liquid crystal composition of the present invention, the content of the compound is, for example, 1 to 50% in one embodiment of the present invention. In still another embodiment of the present invention, the content is 1% to 40%. In still another embodiment of the present invention, the content is 1% to 35%. In still another embodiment of the present invention, the content is 1% to 30%. In still another embodiment of the present invention, the content is 1% to 20%. In still another embodiment of the present invention, the content is 1% to 15%. In still another embodiment of the present invention, the content is 1% to 10%. In still another embodiment of the present invention, the content is 1% to 5%.

  When emphasizing solubility at low temperatures, the effect is high when the content is set to be large. On the other hand, when the response speed is important, the effect is high when the content is set low. Furthermore, when improving dripping marks and image sticking characteristics, it is preferable to set the content range in the middle.

  Furthermore, the compound represented by General Formula (I-5) is preferably a compound selected from the group of compounds represented by Formula (6.1) to Formula (6.6), and is represented by Formula (6.3). ), A compound represented by formula (6.4) and formula (6.6).

  For example, the content of the compound represented by the formula (6.6) is preferably 2% by mass or more and 30% by mass or less, and preferably 4% by mass or more and 30% by mass with respect to the total mass of the liquid crystal composition of the present invention. % Or more, more preferably 5% by mass or more and 30% by mass or less, more preferably 6% by mass or more and 30% by mass or less, and more preferably 9% by mass or more and 30% by mass or less. Is more preferably 12% by mass or more and 30% by mass or less, more preferably 14% by mass or more and 30% by mass or less, and more preferably 16% by mass or more and 30% by mass or less. More preferably, it is 20 mass% or more and 25 mass% or less, More preferably, it is 20 mass% or more and 24 mass% or less, It is especially preferable that they are 22 mass% or more and 23 mass% or less.

  The liquid crystal composition of the present invention can further contain compounds represented by formula (6.7) to formula (6.9).

  Adjusting the content of the compounds represented by formula (6.7) to formula (6.9) according to required performance such as solubility at low temperature, transition temperature, electrical reliability, and birefringence. The compound is preferably contained in an amount of 2% by mass or more, more preferably 3% by mass or more, and further preferably 4% by mass or more, based on the total mass of the liquid crystal composition of the present invention. More preferably 5% by mass or more, and particularly preferably 7% by mass or more.

  Furthermore, it is preferable that the compound represented by general formula (I) is a compound chosen from the compound group represented by general formula (I-6).

(Expressed in the ^{formula, R 11} and ^{R 12} are independently an alkyl group having 1 to 5 carbon atoms, an alkenyl group or an alkoxy group having 1 to 4 carbon atoms carbon atoms 4 to ^{5, X 11} and X ¹² each independently represents a fluorine atom or a hydrogen atom, and either X ¹¹ or X ¹² is a fluorine atom.)

  The content of the compound represented by the general formula (I-6) is preferably 2% by mass to 30% by mass with respect to the total mass of the liquid crystal composition of the present invention, and is preferably 4% by mass to 30% by mass. It is more preferably 5% by mass or more and 30% by mass or less, more preferably 6% by mass or more and 30% by mass or less, and more preferably 9% by mass or more and 30% by mass or less. More preferably, it is 12 mass% or more and 30 mass% or less, More preferably, it is 14 mass% or more and 30 mass% or less, It is more preferable that it is 16 mass% or more and 30 mass% or less, 18 mass % To 25% by mass, more preferably 20% to 24% by mass, and particularly preferably 22% to 23% by mass.

  Furthermore, the compound represented by the general formula (I-6) is preferably a compound represented by the formula (7.1).

  Furthermore, it is preferable that the compound represented by general formula (I) is a compound chosen from the compound group represented by general formula (I-7).

(In the formula, R ¹¹ and R ¹² each independently represent an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms, and X ¹² represents Independently represents a fluorine atom or a chlorine atom.)

  The content of the compound represented by the general formula (I-7) is preferably 1% by mass to 30% by mass with respect to the total mass of the liquid crystal composition of the present invention, and is preferably 2% by mass to 30% by mass. Is more preferably 3% by mass or more and 30% by mass or less, more preferably 4% by mass or more and 30% by mass or less, and more preferably 6% by mass or more and 30% by mass or less. More preferably, it is 8% by mass or more and 30% by mass or less, more preferably 10% by mass or more and 30% by mass or less, more preferably 12% by mass or more and 30% by mass or less, and more preferably 15% by mass. % To 25% by mass, more preferably 18% to 24% by mass, and particularly preferably 21% to 22% by mass.

  Furthermore, the compound represented by the general formula (I-7) is preferably a compound represented by the formula (8.1).

  Furthermore, it is preferable that the compound represented by general formula (I) is a compound chosen from the compound group represented by general formula (I-8).

(In the formula, R ¹⁶ and R ¹⁷ each independently represents an alkenyl group having 2 to 5 carbon atoms.)

Although there is no restriction | limiting in particular in the kind of compound which can be combined, According to performance requested | required, such as solubility at low temperature, transition temperature, electrical reliability, birefringence, it is preferable to combine 1 type to 3 types. .
The content of the compound represented by the general formula (I-8) is solubility at low temperature, transition temperature, electrical reliability, birefringence, process compatibility, dripping marks, image sticking, dielectric anisotropy According to the required performance such as, it is preferably 5% by mass or more and 65% by mass or less, more preferably 10% by mass or more and 65% by mass or less, with respect to the total mass of the liquid crystal composition of the present invention. More preferably, they are 15 mass% or more and 65 mass% or less, More preferably, they are 20 mass% or more and 65 mass% or less, More preferably, they are 25 mass% or more and 65 mass% or less, 30 mass% or more and 65 mass% or less. More preferably, it is 35 mass% or less, More preferably, it is 35 mass% or more and 65 mass% or less, More preferably, it is 40 mass% or more and 65 mass% or less, It is 45 mass% or more and 60 mass% or less. Preparative more preferably, more preferably at most 50 mass% or more 58 wt%, particularly preferably not more than 55 wt% or more 56 wt%.

  Furthermore, the compound represented by the general formula (I-8) is preferably a compound selected from the group of compounds represented by the formula (9.1) to the formula (9.10), and represented by the formula (9.2). ), A compound represented by formula (9.4) and formula (9.7) is preferable.

  Furthermore, it is preferable that the compound represented by general formula (L) is a compound chosen, for example from the compound represented by general formula (II).

(R ²¹ and R ²² each independently represents an alkenyl group having 2 to 5 carbon atoms, an alkyl group having 1 to 5 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms, and A ² represents 1,4- cyclohexylene or 1,4-phenylene group, ^{Q 2} is a single _{bond, -COO -, - CH 2 -CH} 2 - or an _-CF 2 O-).

  Although there is no restriction | limiting in particular in the kind of compound which can be combined, It combines according to performance requested | required, such as solubility at low temperature, transition temperature, electrical reliability, birefringence. The kind of the compound used is, for example, one kind as one embodiment of the present invention. Or in another embodiment of the present invention, there are two types. Moreover, in another embodiment of this invention, they are three types. Furthermore, in another embodiment of this invention, they are four or more types.

  In the liquid crystal composition of the present invention, the content of the compound represented by the general formula (II) includes solubility at low temperature, transition temperature, electrical reliability, birefringence, process suitability, dripping marks, and burn-in. Therefore, it is necessary to appropriately adjust according to required performance such as dielectric anisotropy.

For example, in one embodiment of the present invention, the content of the compound is 3 to 50% by mass with respect to the total mass of the liquid crystal composition of the present invention. Or in another embodiment of this invention, the said content is 5-50 mass%. In still another embodiment of the present invention, the content is 7% to 50% by mass. Furthermore, in another embodiment of this invention, the said content is 10-50 mass%. Furthermore, in another embodiment of this invention, the said content is 14-50 mass%. Furthermore, in another embodiment of this invention, the said content is 16-50 mass%. Furthermore, in another embodiment of this invention, the said content is 20-50 mass%. Furthermore, in another embodiment of this invention, the said content is 23-50 mass%. Furthermore, in another embodiment of this invention, the said content is 26-50 mass%. Furthermore, in another embodiment of this invention, the said content is 30-50 mass%. Furthermore, in another embodiment of this invention, the said content is 35-50 mass%. Furthermore, in another embodiment of this invention, the said content is 40-50 mass%.

  Furthermore, with respect to the total mass of the liquid crystal composition of the present invention, the content of the compound is, for example, 3 to 50% by mass in one embodiment of the present invention. In still another embodiment of the present invention, the content is 3% to 40% by mass. In still another embodiment of the present invention, the content is 3% to 35% by mass. Furthermore, in another embodiment of this invention, the said content is 3-30 mass%. Furthermore, in another embodiment of this invention, the said content is 3-20 mass%. Furthermore, in another embodiment of this invention, the said content is 3-15 mass%. Furthermore, in another embodiment of this invention, the said content is 3-10 mass%. Furthermore, in another embodiment of this invention, the said content is 3-5 mass%.

  Furthermore, it is preferable that the compound represented by general formula (II) is a compound chosen from the compound group represented, for example by general formula (II-1).

(R ²¹ and R ²² each independently represents an alkenyl group having 2 to 5 carbon atoms, an alkyl group having 1 to 5 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms.)

  The content of the compound represented by the general formula (II-1) is preferably adjusted according to required performance such as solubility at low temperature, transition temperature, electrical reliability, birefringence and the like. The mass is preferably from 24% by mass to 24% by mass, more preferably from 8% by mass to 18% by mass, and still more preferably from 12% by mass to 14% by mass.

  Furthermore, it is preferable that the compound represented by general formula (II-1) is a compound represented, for example by Formula (10.1) and Formula (10.2).

  Furthermore, it is preferable that the compound represented by general formula (II) is a compound chosen from the compound group represented, for example by general formula (II-2).

(R ²³ represents an alkenyl group having 2 to 5 carbon atoms, and R ²⁴ represents an alkyl group having 1 to 5 carbon atoms or an alkoxy group having 1 to 4 carbon atoms.)

  Although there is no restriction | limiting in particular in the kind of compound which can be combined, It combines according to performance requested | required, such as solubility at low temperature, transition temperature, electrical reliability, birefringence. The kind of the compound used is, for example, one kind as one embodiment of the present invention. Or in another embodiment of the present invention, it is two or more types.

  In the liquid crystal composition of the present invention, the content of the compound represented by the general formula (II-2) is low temperature solubility, transition temperature, electrical reliability, birefringence index, process suitability, dropping trace. Therefore, it is necessary to adjust appropriately according to required performance such as image sticking and dielectric anisotropy.

For example, in one embodiment of the present invention, the content of the compound is 3 to 50% by mass with respect to the total mass of the liquid crystal composition of the present invention. Or in another embodiment of this invention, the said content is 5-50 mass%. In still another embodiment of the present invention, the content is 7% to 50% by mass. Furthermore, in another embodiment of this invention, the said content is 10-50 mass%. Furthermore, in another embodiment of this invention, the said content is 14-50 mass%. Furthermore, in another embodiment of this invention, the said content is 16-50 mass%. Furthermore, in another embodiment of this invention, the said content is 20-50 mass%. Furthermore, in another embodiment of this invention, the said content is 23-50 mass%. Furthermore, in another embodiment of this invention, the said content is 26-50 mass%. Furthermore, in another embodiment of this invention, the said content is 30-50 mass%. Furthermore, in another embodiment of this invention, the said content is 35-50 mass%. Furthermore, in another embodiment of this invention, the said content is 40-50 mass%.

  Furthermore, with respect to the total mass of the liquid crystal composition of the present invention, the content of the compound is, for example, 3 to 50% by mass in one embodiment of the present invention. In still another embodiment of the present invention, the content is 3% to 40% by mass. In still another embodiment of the present invention, the content is 3% to 35% by mass. Furthermore, in another embodiment of this invention, the said content is 3-30 mass%. Furthermore, in another embodiment of this invention, the said content is 3-20 mass%. Furthermore, in another embodiment of this invention, the said content is 3-15 mass%. Furthermore, in another embodiment of this invention, the said content is 3-10 mass%. Furthermore, in another embodiment of this invention, the said content is 3-5 mass%.

  Furthermore, the compound represented by the general formula (II-2) is preferably a compound represented by, for example, the formula (11.1) to the formula (11.3).

    Depending on the required performance such as solubility at low temperature, transition temperature, electrical reliability, birefringence and the like, even if the compound represented by formula (11.1) is contained, ) Or a compound represented by the formula (11.1) and a compound represented by the formula (11.2), or a compound represented by the formula ( All compounds represented by formula (11.1) to formula (11.3) may be included. The content of the compound represented by formula (11.1) or formula (11.2) is preferably 3% by mass or more and 40% by mass or less based on the total mass of the liquid crystal composition of the present invention. More preferably, it is more than 5 mass% and less than 35 mass%, It is more preferable that it is 5 mass% or more and 30 mass% or less, It is especially preferable that it is 5 mass% or more and 25 mass% or less. % Is most preferred. Moreover, among the most preferable ranges, for example, 7% by mass to 20% by mass, 7% by mass to 18% by mass, 7% by mass to 15% by mass, 7% by mass to 12% by mass, 7% by mass or more. 10 mass% or less is mentioned.

The content of the compound represented by the formula (11.2) is preferably 3% by mass or more and 40% by mass or less, and preferably 3% by mass or more and 35% by mass with respect to the total mass of the liquid crystal composition of the present invention. % Or less, more preferably 3% by mass or more and 30% by mass or less, further preferably 3% by mass or more and 25% by mass or less, and further preferably 3% by mass or more and 20% by mass or less. Is particularly preferable, and most preferably 3% by mass or more and 15% by mass or less. Among the most preferable ranges, for example, 3 mass% to 12 mass%, 3 mass% to 10 mass%, 3 mass% to 8 mass%, 3 mass% to 6 mass%, 6 mass% to 15 mass%. % Or less, 8 mass% or more and 15 mass% or less, 10 mass% or more and 15 mass% or less, 12 mass% or more and 15 mass% or less.

When both the compound represented by Formula (11.1) and the compound represented by Formula (11.2) are contained, the total mass of both compounds is with respect to the total mass of the liquid crystal composition of the present invention. It is preferably 13% by mass or more and 45% by mass or less, more preferably 19% by mass or more and 40% by mass or less, still more preferably 24% by mass or more and 35% by mass or less, and more preferably 30% by mass or more and 35% by mass or less. It is particularly preferable that the content is not more than mass%.

  Furthermore, it is preferable that the compound represented by general formula (II) is a compound chosen from the compound group represented, for example by general formula (II-3).

(R ²⁵ represents an alkyl group having 1 to 5 carbon atoms, and R ²⁴ represents an alkyl group having 1 to 5 carbon atoms or an alkoxy group having 1 to 4 carbon atoms.)

  Although there is no restriction | limiting in particular in the kind of compound which can be combined, According to performance requested | required, such as solubility at low temperature, transition temperature, electrical reliability, birefringence, it is 1 type-from among these compounds. It is preferable to contain three types.

  The content of the compound represented by the general formula (II-3) is solubility at low temperature, transition temperature, electrical reliability, birefringence, process compatibility, dripping marks, image sticking, dielectric anisotropy. It is necessary to adjust appropriately according to the required performance. As preferable content, the content of the said compound is 2-45 mass% with respect to the gross mass of the liquid-crystal composition of this invention, for example. As more preferable content, for example, 5-45 mass%, 8-45 mass%, 11-45 mass%, 14-45 mass%, 17-45 mass%, 20-45 mass%, 23-45 mass%, 26-45 mass%, 29-45 mass%, or 2-45 mass%, 2-40 mass%, 2-35 mass%, 2-30 mass%, 2-25 mass%, 2-20 mass%, 2 -15 mass%, 2-10 mass% is mentioned.

  Furthermore, the compound represented by the general formula (II-3) is preferably a compound represented by the formula (12.1) to the formula (12.3), 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 formula (12.1) is contained, the formula (12.2) Or a compound represented by formula (12.1) and a compound represented by formula (12.2).

The content of the compound represented by formula (12.1) or formula (12.2) is preferably 3% by mass or more and 40% by mass or less based on the total mass of the liquid crystal composition of the present invention. More preferably, they are 7 mass% or more and 40 mass% or less, More preferably, they are 7 mass% or more and 40 mass% or less, More preferably, they are 9 mass% or more and 40 mass% or less, 11 mass% or more and 40 mass% or less. % Is more preferably 12% by mass or more and 40% by mass or less, further preferably 13% by mass or more and 40% by mass or less, and 18% by mass or more and 30% by mass or less. Is more preferable, and it is particularly preferably 21% by mass or more and 25% by mass or less. Further, the content of the compound represented by the formula (12.2) is preferably 3% by mass or more and 40% by mass or less with respect to the total mass of the liquid crystal composition of the present invention, and 5% by mass or more and 40% by mass. % Is more preferably 8% by mass or more and 40% by mass or less, further preferably 10% by mass or more and 40% by mass or less, and more preferably 12% by mass or more and 40% by mass or less. Is more preferably 15% by mass or more and 40% by mass or less, further preferably 17% by mass or more and 30% by mass or less, and particularly preferably 19% by mass or more and 25% by mass or less. When both the compound represented by Formula (12.1) and the compound represented by Formula (12.2) are contained, the total mass of both compounds is with respect to the total mass of the liquid crystal composition of the present invention. It is preferably 15% by mass or more and 45% by mass or less, more preferably 19% by mass or more and 45% by mass or less, further preferably 24% by mass or more and 40% by mass or less, and 30% by mass or more and 35% by mass or less. It is particularly preferable that the content is not more than mass%.

  The content of the compound represented by the formula (12.3) is preferably 0.05% by mass or more and 2% by mass or less with respect to the total mass of the liquid crystal composition of the present invention, and 0.1% by mass. % To 1% by mass, more preferably 0.2% to 0.5% by mass. The compound represented by the formula (12.3) may be an optically active compound.

  Furthermore, it is preferable that the compound represented by general formula (II-3) is a compound chosen from the compound group represented, for example by general formula (II-3-1).

(R ²⁵ represents an alkyl group having 1 to 5 carbon atoms, and R ²⁶ represents an alkoxy group having 1 to 4 carbon atoms.)

  Although there is no restriction | limiting in particular in the kind of compound which can be combined, According to performance requested | required, such as solubility at low temperature, transition temperature, electrical reliability, birefringence, it is 1 type-from among these compounds. It is preferable to contain three types.

  The content of the compound represented by the general formula (II-3-1) is preferably adjusted according to required performance such as solubility at low temperature, transition temperature, electrical reliability, and birefringence. 1 mass% or more and 24 mass% or less are preferable, 4 mass% or more and 18 mass% or less are more preferable, and 8 mass% or more and 14 mass% or less are still more preferable.

  Further, the compound represented by the general formula (II-3-1) is preferably, for example, a compound represented by the formula (13.1) to the formula (13.4), in particular, the formula (13.3). It is preferable that it is a compound represented by this.

  Furthermore, it is preferable that the compound represented by general formula (II) is a compound chosen from the compound group represented, for example by general formula (II-4).

(R ²¹ and R ²² each independently represents an alkenyl group having 2 to 5 carbon atoms, an alkyl group having 1 to 5 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms.)

Of these compounds, only one kind or two or more kinds may be contained, but it is preferable to combine them appropriately according to the required performance. Although there is no restriction | limiting in particular in the kind of compound which can be combined, According to performance requested | required, such as solubility at low temperature, transition temperature, electrical reliability, birefringence, it is 1 type-from among these compounds. Two types are preferably contained, and one to three types are particularly preferably contained.

  The content of the compound represented by the general formula (II-4) is preferably 1% by mass to 15% by mass with respect to the total mass of the liquid crystal composition of the present invention, and is preferably 2% by mass to 15% by mass. Is more preferably 3% by mass or more and 15% by mass or less, more preferably 4% by mass or more and 12% by mass or less, and more preferably 5% by mass or more and 7% by mass or less. Particularly preferred.

  Further, the compound represented by the general formula (II-4) is preferably, for example, a compound represented by the formula (14.1) to the formula (14.5), and in particular, the formula (14.2) or It is preferable that it is a compound represented by Formula (14.5).

  Furthermore, it is preferable that the compound represented by general formula (L) is a compound chosen from the compound group represented by general formula (III).

(R ³¹ and R ³² each independently represent an alkenyl group having 2 to 5 carbon atoms, an alkyl group having 1 to 5 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms.)

The content of the compound represented by the general formula (III) is 3% by mass or more and 25% by mass or less with respect to the total mass of the liquid crystal composition of the present invention in consideration of required solubility and birefringence. It is preferable to contain 6% by mass or more and 20% by mass or less, and more preferably 8% by mass or more and 15% by mass or less.

  Further, the compound represented by the general formula (III) is preferably, for example, a compound represented by the formula (15.1) to the formula (15.3), and particularly represented by the formula (15.3). It is preferable that it is a compound.

  Furthermore, it is preferable that the compound represented by general formula (III) is a compound chosen from the compound group represented by general formula (III-1).

(R ³³ represents an alkenyl group having 2 to 5 carbon atoms, and R ³² independently represents an alkyl group having 1 to 5 carbon atoms or an alkoxy group having 1 to 4 carbon atoms.)

  The compound represented by the general formula (III-1) preferably has its content adjusted according to required performance such as solubility at low temperature, transition temperature, electrical reliability, birefringence, 4 mass% or more and 23 mass% or less are preferable, and it is more preferable that they are 5 mass% or more and 18 mass% or less.

  The compound represented by the general formula (III-1) is preferably, for example, a compound represented by the formula (16.1) or the formula (16.2).

  Furthermore, it is preferable that the compound represented by general formula (III) is a compound chosen from the compound group represented by general formula (III-2).

(R ³¹ represents an alkyl group having 1 to 5 carbon atoms, and R ³⁴ represents an alkoxy group having 1 to 4 carbon atoms.)

  The content of the compound represented by the general formula (III-2) is preferably adjusted according to required performance such as solubility at low temperature, transition temperature, electrical reliability, birefringence and the like. The mass is preferably from 23% by mass to 23% by mass, more preferably from 6% by mass to 18% by mass, and still more preferably from 10% by mass to 13% by mass.

  Furthermore, the compound represented by the general formula (III-2) is preferably a compound selected from the group of compounds represented by, for example, the formula (17.1) to the formula (17.3). .3) is preferred.

  Furthermore, the compound represented by the general formula (L) is preferably a compound selected from the group represented by the general formula (V).

(In the formula, R ⁵¹ and R ⁵² each independently represent an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms, and A ⁵¹ and A ⁵² Each independently represents a 1,4-cyclohexylene group or a 1,4-phenylene group, Q ⁵ represents a single bond or —COO—, and X ⁵¹ and X ⁵² each independently represents a fluorine atom or a hydrogen atom. Represents.)

  Although there is no restriction | limiting in particular in the kind of compound which can be combined, It combines according to performance requested | required, such as solubility at low temperature, transition temperature, electrical reliability, birefringence. The kind of the compound used is, for example, one kind as one embodiment of the present invention. Or in another embodiment of the present invention, there are two types. Furthermore, in another embodiment of this invention, they are three types. Furthermore, in another embodiment of this invention, they are four types.

  The content of the compound is, for example, 2 to 40% by mass in one embodiment with respect to the total mass of the liquid crystal composition of the present invention. Furthermore, in another embodiment of this invention, the said content is 4-40 mass%. Furthermore, in another embodiment of this invention, the said content is 7-40 mass%. Furthermore, in another embodiment of this invention, the said content is 10-40 mass%. Furthermore, in another embodiment of this invention, the said content is 12-40 mass%. Furthermore, in another embodiment of this invention, the said content is 15-40 mass%. In still another embodiment of the present invention, the content is 17% to 40% by mass. Furthermore, in another embodiment of this invention, the said content is 18-40 mass%. Furthermore, in another embodiment of this invention, the said content is 20-40 mass%. Furthermore, in another embodiment of this invention, the said content is 22-40 mass%.

  For example, in one embodiment of the present invention, the content of the compound is 2 to 40% by mass with respect to the total mass of the liquid crystal composition of the present invention. Furthermore, in another embodiment of this invention, content of the said compound is 2-30 mass%. Furthermore, in another embodiment of this invention, content of the said compound is 2-25 mass%. Furthermore, in another embodiment of this invention, content of the said compound is 2-20 mass%. Furthermore, in another embodiment of this invention, content of the said compound is 2-15 mass%. Furthermore, in another embodiment of this invention, content of the said compound is 2-10 mass%. Furthermore, in another embodiment of this invention, content of the said compound is 2-5 mass%. Furthermore, in another embodiment of this invention, content of the said compound is 2-4 mass%.

  Furthermore, it is preferable that the compound represented by general formula (V) is a compound represented by general formula (V-1).

(In the formula, R ⁵¹ and R ⁵² each independently represents an alkyl group having 1 to 5 carbon atoms, an alkenyl having 2 to 5 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms, and X ⁵¹ and X ⁵² Each independently represents a fluorine atom or a hydrogen atom.)

  Furthermore, it is preferable that the compound represented by general formula (V-1) is a compound represented by general formula (V-1-1).

(In the formula, R ⁵¹ and R ⁵² each independently represents an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms.)

  The compound represented by the general formula (V-1-1) is preferably contained in an amount of 1% by mass to 15% by mass with respect to the total mass of the liquid crystal composition of the present invention. It is more preferable to contain, and it is further more preferable to contain 2 mass% or more and 10 mass% or less.

  Further, the compound represented by the general formula (V-1-1) is preferably a compound represented by the formula (20.1) to the formula (20.4), and is represented by the formula (20.2). It is preferable that it is a compound.

  Furthermore, it is preferable that the compound represented by general formula (V-1) is a compound represented by general formula (V-1-2).

(In the formula, R ⁵¹ and R ⁵² each independently represents an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms.)

  The compound represented by the general formula (V-1-2) is preferably contained in an amount of 1% by mass to 15% by mass with respect to the total mass of the liquid crystal composition of the present invention. More preferably, it is contained, more preferably 3% by mass or more and 10% by mass or less, and particularly preferably 4% by mass or more and 8% by mass or less.

  Further, the compound represented by the general formula (V-1-2) is preferably a compound represented by the formula (21.1) to the formula (21.3), represented by the formula (21.1). It is preferable that it is a compound.

  Furthermore, it is preferable that the compound represented by general formula (V-1) is a compound represented by general formula (V-1-3).

(In the formula, R ⁵¹ and R ⁵² each independently represents an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms.)

  The compound represented by formula (V-1-3) is preferably contained in an amount of 1% by mass or more, more preferably 2% by mass or more, based on the total mass of the liquid crystal composition of the present invention. The content is more preferably at least 4% by mass, particularly preferably at least 4% by mass. Moreover, as a ratio which can be contained at the maximum, 15 mass% or less is preferable, 10 mass% or less is more preferable, and 8 mass% or less is further more preferable.

  Furthermore, the compound represented by the general formula (V-1-3) is a compound represented by the formula (22.1) to the formula (22.3). It is preferable that it is a compound represented by Formula (22.1).

  Furthermore, it is preferable that the compound represented by general formula (V) is a compound represented by general formula (V-2).

(In the formula, R ⁵¹ and R ⁵² each independently represents an alkyl group having 1 to 5 carbon atoms, an alkenyl having 2 to 5 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms, and X ⁵¹ and X ⁵² Each independently represents a fluorine atom or a hydrogen atom.)

  Although there is no restriction | limiting in particular in the kind of compound which can be combined, It combines according to performance requested | required, such as solubility at low temperature, transition temperature, electrical reliability, birefringence. The kind of the compound used is, for example, one kind as one embodiment of the present invention. Or in another embodiment of the present invention, it is two or more types.

  The content of the compound is, for example, 2 to 40% by mass in one embodiment with respect to the total mass of the liquid crystal composition of the present invention. Furthermore, in another embodiment of this invention, content of the said compound is 4-40 mass%. Furthermore, in another embodiment of this invention, content of the said compound is 7-40 mass%. Furthermore, in another embodiment of this invention, content of the said compound is 10-40 mass%. Furthermore, in another embodiment of this invention, content of the said compound is 12-40 mass%. Furthermore, in another embodiment of this invention, content of the said compound is 15-40 mass%. Furthermore, in another embodiment of this invention, content of the said compound is 17-40 mass%. Furthermore, in another embodiment of this invention, content of the said compound is 18-40 mass%. Furthermore, in another embodiment of this invention, content of the said compound is 20-40 mass%. Furthermore, in another embodiment of this invention, content of the said compound is 22-40 mass%.

  For example, in one embodiment of the present invention, the content of the compound is 2 to 40% by mass with respect to the total mass of the liquid crystal composition of the present invention. Furthermore, in another embodiment of this invention, content of the said compound is 2-30 mass%. Furthermore, in another embodiment of this invention, content of the said compound is 2-25 mass%. Furthermore, in another embodiment of this invention, content of the said compound is 2-20 mass%. Furthermore, in another embodiment of this invention, content of the said compound is 2-15 mass%. Furthermore, in another embodiment of this invention, content of the said compound is 2-10 mass%. Furthermore, in another embodiment of this invention, content of the said compound is 2-5 mass%. Furthermore, in another embodiment of this invention, content of the said compound is 2-4 mass%.

  When an embodiment with high Tni is desired for the liquid crystal composition of the present invention, it is preferable to increase the content of the compound represented by formula (V-2), and when an embodiment with low viscosity is desired It is preferable to reduce the amount.

  Furthermore, it is preferable that the compound represented by general formula (V-2) is a compound represented by general formula (V-2-1).

(In the formula, R ⁵¹ and R ⁵² each independently represents an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms.)

  Furthermore, the compound represented by the general formula (V-2-1) is preferably a compound represented by the formula (23.1) to the formula (23.4), and the formula (23.1) or the formula The compound represented by (23.2) is preferable.

  Furthermore, it is preferable that the compound represented by general formula (V-2) is a compound represented by general formula (V-2-2).

(In the formula, R ⁵¹ and R ⁵² each independently represents an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms.)

  Furthermore, the compound represented by the general formula (V-2-2) is preferably a compound represented by the formula (24.1) to the formula (24.4), and the formula (24.1) or the formula A compound represented by (24.2) is preferable.

  Furthermore, it is preferable that the compound represented by general formula (V) is a compound represented by general formula (V-3).

(In the formula, R ⁵¹ and R ⁵² each independently represents an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms.)

  Although there is no restriction | limiting in particular in the kind of compound which can be combined, It combines according to performance requested | required, such as solubility at low temperature, transition temperature, electrical reliability, birefringence. The kind of the compound used is, for example, one kind as one embodiment of the present invention. Or in another embodiment of the present invention, there are two types. Furthermore, in another embodiment of this invention, they are three or more types.

  The compound represented by the general formula (V-3) is preferably contained in an amount of 2% by mass to 16% by mass with respect to the total mass of the liquid crystal composition of the present invention, and is preferably contained in an amount of 4% by mass to 16% by mass. More preferably, it is more preferably 7% by mass or more and 13% by mass or less, and particularly preferably 8% by mass or more and 11% by mass or less.

  Furthermore, the compound represented by the general formula (V-3) is preferably a compound represented by the formula (25.1) to the formula (25.3).

  The liquid crystal composition of the present invention may further contain one or more compounds represented by the general formula (VI).

(Wherein R ⁶¹ and R ⁶² each independently represent a linear alkyl group having 1 to 10 carbon atoms, a linear alkoxy group having 1 to 10 carbon atoms, or a linear alkenyl group having 2 to 10 carbon atoms). Represents.)

  Although there is no restriction | limiting in particular in the kind of compound which can be combined, According to performance requested | required, such as solubility at low temperature, transition temperature, electrical reliability, birefringence, it is 1 type-from among these compounds. It is preferable to contain 3 types, it is more preferable to contain 1 type-4 types, and it is especially preferable to contain 1 type-5 types or more. Moreover, as a ratio which can be contained at the maximum, 35 mass% or less is preferable, 25 mass% or less is more preferable, and 15 mass% or less is further more preferable.

  As the compound represented by the general formula (VI), specifically, the following compounds can be preferably used.

  The liquid crystal composition of the present invention can further contain one or more compounds represented by the general formula (VII).

(Wherein R ⁷¹ and R ⁷² each independently represent a linear alkyl group having 1 to 10 carbon atoms, a linear alkoxy group having 1 to 10 carbon atoms, or a linear alkenyl group having 4 to 10 carbon atoms). Represents.)

  Although there is no restriction | limiting in particular in the kind of compound which can be combined, According to performance requested | required, such as solubility at low temperature, transition temperature, electrical reliability, birefringence, it is 1 type-from among these compounds. It is preferable to contain 3 types, it is more preferable to contain 1 type-4 types, and it is especially preferable to contain 1 type-5 types or more. Moreover, as a ratio which can be contained at the maximum, 35 mass% or less is preferable, 25 mass% or less is more preferable, and 15 mass% or less is further more preferable.

  Specifically, as the compound represented by the general formula (VII), the following compounds can be preferably used.

  The liquid crystal composition of the present invention preferably contains any one or more of the compounds represented by formula (M).

(Wherein R ^M1 represents an alkyl group having 1 to 8 carbon atoms, and one or two or more non-adjacent —CH ₂ — in the alkyl group are each independently —CH═CH—, — Optionally substituted by C≡C—, —O—, —CO—, —COO— or —OCO—,
PM represents 0, 1, 2, 3 or 4;
C ^M1 and C ^M2 are each independently
(D) 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- or -S- And (e) a 1,4-phenylene group (one —CH═ present in this group or two or more —CH═ not adjacent to each other may be replaced by —N═).
Represents a group selected from the group consisting of the above-mentioned groups (d) and (e) each independently substituted with a cyano group, a fluorine atom or a chlorine atom,
K ^M1 and K ^M2 are each independently a single bond, —CH ₂ CH ₂ —, — (CH ₂ ) ₄ —, —OCH ₂ —, —CH ₂ O—, —OCF ₂ —, —CF ₂ O—, -COO-, -OCO- or -C≡C-
When PM is 2, 3 or 4 and there are a plurality of K ^M1 , they may be the same or different, and when PM is 2, 3 or 4 and there are a plurality of C ^M2 They may be the same or different,
X ^M1 and X ^M3 each independently represent a hydrogen atom, a chlorine atom or a fluorine atom,
X ^M2 represents a hydrogen atom, a fluorine atom, a chlorine atom, a cyano group, a trifluoromethyl group, a fluoromethoxy group, a difluoromethoxy group, a trifluoromethoxy group, or a 2,2,2-trifluoroethyl group. However, the compound represented by general formula (ii) is excluded. )

  Although there is no restriction | limiting in particular in the kind of compound which can be combined, It uses combining according to desired performance, such as solubility at low temperature, transition temperature, electrical reliability, birefringence. The kind of the compound used is, for example, one kind as one embodiment of the present invention. Or in another embodiment of the present invention, there are two types. Furthermore, in another embodiment of this invention, they are three types. Furthermore, in another embodiment of the present invention, there are four types. Furthermore, in another embodiment of this invention, they are five types. Furthermore, in another embodiment of the present invention, there are six types. Furthermore, in another embodiment of this invention, they are seven or more types.

  In the liquid crystal composition of the present invention, the content of the compound represented by the general formula (M) is low temperature solubility, transition temperature, electrical reliability, birefringence, process suitability, dripping marks, image sticking. Therefore, it is necessary to appropriately adjust according to required performance such as dielectric anisotropy.

  The content of the compound with respect to the total mass of the liquid crystal composition of the present invention is, for example, 1 to 95% by mass in one embodiment of the present invention. Further, for example, in another embodiment of the present invention, the content of the compound is 10% to 95% by mass. For example, in still another embodiment of the present invention, the content of the compound is 20% to 95% by mass. For example, in still another embodiment of the present invention, the content of the compound is 30% to 95% by mass. For example, in still another embodiment of the present invention, the content of the compound is 40% to 95% by mass. For example, in still another embodiment of the present invention, the content of the compound is 45% to 95% by mass. For example, in still another embodiment of the present invention, the content of the compound is 50% to 95% by mass. For example, in still another embodiment of the present invention, the content of the compound is 55% to 95% by mass. For example, in still another embodiment of the present invention, the content of the compound is 60% to 95% by mass. For example, in still another embodiment of the present invention, the content of the compound is 65% to 95% by mass. For example, in still another embodiment of the present invention, the content of the compound is 70% to 95% by mass. For example, in still another embodiment of the present invention, the content of the compound is 75% to 95% by mass. For example, in still another embodiment of the present invention, the content of the compound is 80% to 95% by mass.

  Moreover, content of the said compound is 1-95 mass% as one embodiment of this invention with respect to the gross mass of the liquid-crystal composition of this invention, for example. Furthermore, as another embodiment of this invention, content of the said compound is 1-85 mass%. In still another embodiment of the present invention, the content of the compound is 1% to 75% by mass. In still another embodiment of the present invention, the content of the compound is 1% to 65% by mass. In still another embodiment of the present invention, the content of the compound is 1% to 55% by mass. In still another embodiment of the present invention, the content of the compound is 1% to 45% by mass. In still another embodiment of the present invention, the content of the compound is 1% to 35% by mass. In still another embodiment of the present invention, the content of the compound is 1% to 25% by mass.

  When the liquid crystal composition of the present invention maintains a low viscosity and a liquid crystal composition having a high response speed is required, it is preferable to lower the lower limit and lower the upper limit. Furthermore, when the liquid crystal composition of the present invention maintains a high Tni and a liquid crystal composition with good temperature stability is required, it is preferable to lower the lower limit and lower the upper limit. Further, when it is desired to increase the dielectric anisotropy in order to keep the driving voltage low, it is preferable to increase the upper limit value while increasing the lower limit value.

R ^M1 is a linear alkyl group having 1 to 5 carbon atoms or a linear alkoxy group having 1 to 4 carbon atoms when the ring structure to which R ^M1 is bonded is a phenyl group (aromatic). And when the ring structure to which it is bonded is a saturated ring structure such as cyclohexane, pyran and dioxane, a linear alkyl group having 1 to 5 carbon atoms, A straight-chain alkoxy group having 1 to 4 carbon atoms and a straight-chain alkenyl group having 2 to 5 carbon atoms are preferred.

The compound represented by the general formula (M) preferably does not have a chlorine atom in the molecule when chemical stability of the liquid crystal composition is required. Further, the compound having a chlorine atom in the liquid crystal composition is preferably 5% or less, preferably 3% or less, preferably 1% or less, preferably 0.5% or less, It is preferable not to contain substantially. “Substantially not contained” means that only a compound containing a chlorine atom unintentionally enters the liquid crystal composition, such as a compound produced as an impurity during compound production.

  It is preferable that the compound represented by general formula (M) is a compound chosen from the compound group represented, for example by general formula (VIII).

(Wherein R ⁸ represents an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms, and X ⁸¹ to X ⁸⁵ are each independently hydrogen. represents an atom or a fluorine atom, ^{Y 8} represents a fluorine atom or -OCF _3.)

  Although there is no restriction | limiting in particular in the kind of compound which can be combined, It uses combining according to desired performance, such as solubility at low temperature, transition temperature, electrical reliability, birefringence. The kind of the compound used is, for example, one kind as one embodiment of the present invention. Or in another embodiment of the present invention, there are two types. Furthermore, in another embodiment of this invention, they are three or more types.

  In the liquid crystal composition of the present invention, the content of the compound represented by the general formula (VIII) is low temperature solubility, transition temperature, electrical reliability, birefringence, process suitability, dripping marks, image sticking. Therefore, it is necessary to appropriately adjust according to required performance such as dielectric anisotropy.

  For example, in one embodiment of the present invention, the content of the compound is 2 to 40% by mass with respect to the total mass of the liquid crystal composition of the present invention. Furthermore, for example, in another embodiment of the present invention, the content of the compound is 4% to 40% by mass. For example, in still another embodiment of the present invention, the content of the compound is 5% to 40% by mass. For example, in still another embodiment of the present invention, the content of the compound is 6% to 40% by mass. For example, in still another embodiment of the present invention, the content of the compound is 7% to 40% by mass. For example, in still another embodiment of the present invention, the content of the compound is 8% to 40% by mass. For example, in still another embodiment of the present invention, the content of the compound is 9% to 40% by mass. For example, in still another embodiment of the present invention, the content of the compound is 10% to 40% by mass. For example, in still another embodiment of the present invention, the content of the compound is 11% to 40% by mass. For example, in still another embodiment of the present invention, the content of the compound is 12% to 40% by mass. For example, in still another embodiment of the present invention, the content of the compound is 14% to 40% by mass. For example, in still another embodiment of the present invention, the content of the compound is 15% to 40% by mass. For example, in still another embodiment of the present invention, the content of the compound is 21% to 40% by mass. For example, in still another embodiment of the present invention, the content of the compound is 23% to 40% by mass.

  Moreover, content of the said compound is 2-40 mass% as one embodiment of this invention with respect to the gross mass of the liquid-crystal composition of this invention, for example. Furthermore, as another embodiment of this invention, content of the said compound is 2-30 mass%. In still another embodiment of the present invention, the content of the compound is 2% to 25% by mass. In still another embodiment of the present invention, the content of the compound is 2% to 21% by mass. In still another embodiment of the present invention, the content of the compound is 2% to 16% by mass. In still another embodiment of the present invention, the content of the compound is 2% to 12% by mass. In still another embodiment of the present invention, the content of the compound is 2% to 8% by mass. In still another embodiment of the present invention, the content of the compound is 2% to 5% by mass.

  When the liquid crystal composition of the present invention maintains a low viscosity and a liquid crystal composition having a high response speed is required, it is preferable to lower the lower limit and lower the upper limit. Furthermore, when the liquid crystal composition of the present invention maintains a high Tni and a liquid crystal composition with good temperature stability is required, it is preferable to lower the lower limit and lower the upper limit. Further, when it is desired to increase the dielectric anisotropy in order to keep the driving voltage low, it is preferable to increase the upper limit value while increasing the lower limit value.

Furthermore, it is preferable that the compound represented by general formula (VIII) is a compound represented by general formula (VIII-1).

(In the formula, R ⁸ represents an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms.)

Although there is no restriction | limiting in particular in the kind of compound which can be combined, It uses combining according to desired performance, such as solubility at low temperature, transition temperature, electrical reliability, birefringence. The kind of the compound used is, for example, one kind as one embodiment of the present invention. Or in another embodiment of the present invention, it is two or more types.

Further, the compound represented by the general formula (VIII-1) is specifically preferably a compound represented by the formula (26.1) to the formula (26.4), and the formula (26.1) Or the compound represented by Formula (26.2) is preferable, and the compound represented by Formula (26.2) is more preferable.

  The content of the compound represented by the formula (26.2) is based on the total mass of the liquid crystal composition of the present invention in consideration of solubility at low temperatures, transition temperature, electrical reliability, birefringence, and the like. On the other hand, it is preferably 2% by mass or more and 40% by mass or less, more preferably 3% by mass or more and 30% by mass or less, further preferably 3% by mass or more and 20% by mass or less, and particularly preferably 3% by mass or more and 15% by mass or less. preferable. Among the particularly preferable ranges, for example, 3% by mass or more and 12% by mass or less, 3% by mass or more and 10% by mass or less, 3% by mass or more and 8% by mass or less, and 3% by mass or more and 6% by mass or less can be given.

Furthermore, it is preferable that the compound represented by general formula (VIII) is a compound represented by general formula (VIII-2).

(In the formula, R ⁸ represents an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms.)

Although there is no restriction | limiting in particular in the kind of compound which can be combined, It uses combining according to desired performance, such as solubility at low temperature, transition temperature, electrical reliability, birefringence. The kind of the compound used is, for example, one kind as one embodiment of the present invention. Or in another embodiment of the present invention, there are two types. Or in another embodiment of this invention, they are three or more types.

The content of the compound represented by the general formula (VIII-2) is 2.5% by mass or more and 25% by mass or less in consideration of solubility at a low temperature, transition temperature, electrical reliability, birefringence, and the like. Preferably, it is 8 mass% or more and 25 mass% or less, More preferably, it is 10 mass% or less 20 mass% or less, More preferably, it is 12 mass% or more and 15 mass% or less.

Furthermore, the compound represented by the general formula (VIII-2) is preferably a compound represented by the formula (27.1) to the formula (27.4), and is represented by the formula (27.2). A compound is preferred.

Furthermore, it is preferable that the compound represented by general formula (VIII) is a compound represented by general formula (VIII-3).

(In the formula, R ⁸ represents an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms.)

Although there is no restriction | limiting in particular in the kind of compound which can be combined, It uses combining according to desired performance, such as solubility at low temperature, transition temperature, electrical reliability, birefringence. The kind of the compound used is, for example, one kind as one embodiment of the present invention. Or in another embodiment of the present invention, it is two or more types.

  Furthermore, the compound represented by the general formula (VIII-3) is specifically preferably a compound represented by the formula (26.11) to the formula (26.14), and the formula (26.11) Or the compound represented by Formula (26.12) is preferable, and the compound represented by Formula (26.12) is more preferable.

  Moreover, it is preferable that the compound represented by general formula (M) is a compound chosen from the compound group represented, for example by general formula (IX).

(Wherein R ⁹ represents an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms, and X ⁹¹ and X ⁹² are each independently hydrogen. An atom or a fluorine atom, Y ⁹ represents a fluorine atom, a chlorine atom or —OCF ₃ ; U ⁹ represents a single bond, —COO— or —CF ₂ O—.)

  Although there is no restriction | limiting in particular in the kind of compound which can be combined, It uses combining according to desired performance, such as solubility at low temperature, transition temperature, electrical reliability, birefringence. The kind of the compound used is, for example, one kind as one embodiment of the present invention. Or in another embodiment of the present invention, there are two types. Furthermore, in another embodiment of this invention, they are three types. Furthermore, in another embodiment of the present invention, there are four types. Furthermore, in another embodiment of this invention, they are five types. Furthermore, in another embodiment of this invention, they are six or more types.

  In the liquid crystal composition of the present invention, the content of the compound represented by the general formula (IX) is low temperature solubility, transition temperature, electrical reliability, birefringence index, process suitability, dripping marks, and burn-in. Therefore, it is necessary to appropriately adjust according to required performance such as dielectric anisotropy.

  The content of the compound with respect to the total mass of the liquid crystal composition of the present invention is, for example, 3 to 70% by mass in one embodiment of the present invention. Furthermore, for example, in another embodiment of the present invention, the content of the compound is 5% to 70% by mass. For example, in still another embodiment of the present invention, the content of the compound is 8% to 70% by mass. For example, in still another embodiment of the present invention, the content of the compound is 10% to 70% by mass. For example, in still another embodiment of the present invention, the content of the compound is 12% to 70% by mass. For example, in still another embodiment of the present invention, the content of the compound is 15% to 70% by mass. For example, in still another embodiment of the present invention, the content of the compound is 17% to 70% by mass. For example, in still another embodiment of the present invention, the content of the compound is 20% to 70% by mass. For example, in still another embodiment of the present invention, the content of the compound is 24% to 70% by mass. For example, in still another embodiment of the present invention, the content of the compound is 28% to 70% by mass. For example, in still another embodiment of the present invention, the content of the compound is 30% to 70% by mass. For example, in still another embodiment of the present invention, the content of the compound is 34% to 70% by mass. For example, in still another embodiment of the present invention, the content of the compound is 39% to 70% by mass. For example, in still another embodiment of the present invention, the content of the compound is 40% to 70% by mass. For example, in still another embodiment of the present invention, the content of the compound is 42% to 70% by mass. For example, in still another embodiment of the present invention, the content of the compound is 45% to 70% by mass.

  Moreover, content of the said compound is 3-70 mass% as one embodiment of this invention with respect to the gross mass of the liquid-crystal composition of this invention, for example. Furthermore, as another embodiment of this invention, content of the said compound is 3-60 mass%. In still another embodiment of the present invention, the content of the compound is 3% to 55% by mass. In still another embodiment of the present invention, the content of the compound is 3% to 50% by mass. In still another embodiment of the present invention, the content of the compound is 3% to 45% by mass. In still another embodiment of the present invention, the content of the compound is 3% to 40% by mass. In still another embodiment of the present invention, the content of the compound is 3% to 35% by mass. In still another embodiment of the present invention, the content of the compound is 3% to 30% by mass. In still another embodiment of the present invention, the content is 25% by mass. In still another embodiment of the present invention, the content of the compound is 3% to 20% by mass. In still another embodiment of the present invention, the content of the compound is 3% to 15% by mass. In still another embodiment of the present invention, the content of the compound is 3% to 10% by mass.

  When the liquid crystal composition of the present invention maintains a low viscosity and a liquid crystal composition having a high response speed is required, it is preferable to lower the lower limit and lower the upper limit. Furthermore, when the liquid crystal composition of the present invention requires a high Tni and a liquid crystal composition that does not easily cause burn-in, it is preferable to lower the lower limit and lower the upper limit. Further, when it is desired to increase the dielectric anisotropy in order to keep the driving voltage low, it is preferable to increase the upper limit value while increasing the lower limit value.

  Furthermore, it is preferable that the compound represented by general formula (IX) is a compound represented by general formula (IX-1).

(Wherein R ⁹ represents an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms or an alkoxy group having 1 to 4 carbon atoms, X ⁹² represents a hydrogen atom or a fluorine atom, Y ⁹ represents a fluorine atom or —OCF _3. )

Although there is no restriction | limiting in particular in the kind of compound which can be combined, It uses combining according to desired performance, such as solubility at low temperature, transition temperature, electrical reliability, birefringence. The kind of the compound used is, for example, one kind as one embodiment of the present invention. Or in another embodiment of the present invention, there are two types. Furthermore, in another embodiment of this invention, they are three types. Furthermore, in another embodiment of this invention, they are four or more types.

  Furthermore, it is preferable that the compound represented by general formula (IX-1) is a compound represented by general formula (IX-1-1).

(In the formula, R ⁹ represents an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms.)

  Although there is no restriction | limiting in particular in the kind of compound which can be combined, It uses combining according to desired performance, such as solubility at low temperature, transition temperature, electrical reliability, birefringence. The kind of the compound used is, for example, one kind as one embodiment of the present invention. Or in another embodiment of the present invention, there are two types. Furthermore, in another embodiment of this invention, they are three or more types.

  The content of the compound represented by the general formula (IX-1-1) is preferably an upper limit value depending on the embodiment in consideration of solubility at low temperature, transition temperature, electrical reliability, birefringence and the like. There is a lower limit.

For example, the content of the compound with respect to the total mass of the liquid crystal composition of the present invention is 1 to 40% by mass in one embodiment, 2 to 40% by mass in another embodiment, and 4 in another embodiment. -40% by weight, in yet another embodiment 10-40% by weight, in yet another embodiment 14-40% by weight, in yet another embodiment 16-40% by weight, and still another embodiment. Then, it is 21-40 mass%.

  Further, for example, the content of the compound is 1 to 40% by mass in one embodiment, 1 to 35% by mass in another embodiment, and yet another implementation with respect to the total mass of the liquid crystal composition of the present invention. 1-30% by weight in a form, 1-25% by weight in yet another embodiment, 1-10% by weight in yet another embodiment, 1-7% by weight in yet another embodiment, or still another In the embodiment, the content is 1 to 5% by mass.

  Further, the compound represented by the general formula (IX-1-1) is preferably a compound represented by the formula (28.1) to the formula (28.5), and the formula (28.3) or the formula A compound represented by (28.5) is preferable.

  In the liquid crystal composition of the present invention, the content of the compound represented by the formula (28.3) is determined in consideration of solubility at a low temperature, transition temperature, electrical reliability, and the like. It is preferable that they are 1 mass% or more and 30 mass% or less with respect to the total mass of. More preferable examples of the content are 2% by mass or more and 20% by mass or less, 2% by mass or more and 15% by mass or less, 2% by mass or more and 12% by mass or less, 2% by mass or more and 9% by mass or less, 2% by mass or more and 5% by mass. % By mass or less, or 4% by mass to 20% by mass, 6% by mass to 20% by mass, 8% by mass to 20% by mass, 10% by mass to 20% by mass, 15% by mass to 20% by mass .

  In the liquid crystal composition of the present invention, the content of the compound represented by the formula (28.5) is determined in consideration of solubility at low temperatures, transition temperature, electrical reliability, and the like. The total mass is preferably 3% by mass or more and 25% by mass or less, more preferably 3% by mass or more and 20% by mass or less, further preferably 3% by mass or more and 15% by mass or less, and more preferably 3% by mass or more and 10% by mass or less. % Or less is particularly preferable.

  Furthermore, the compound represented by General Formula (IX-1) is preferably a compound represented by General Formula (IX-1-2).

(In the formula, R ⁹ represents an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms.)

  Although there is no restriction | limiting in the kind of compound which can be combined, It is preferable to combine 1 type to 3 types in consideration of solubility at low temperature, transition temperature, electrical reliability, birefringence, etc. It is more preferable to combine the types.

  The content of the compound represented by the general formula (IX-1-2) is based on the total mass of the liquid crystal composition of the present invention in consideration of solubility at a low temperature, transition temperature, electrical reliability, and the like. It is preferably 1% by mass or more and 30% by mass or less, more preferably 5% by mass or more and 30% by mass or less, further preferably 8% by mass or more and 30% by mass or less, and further preferably 10% by mass or more and 25% by mass or less. 14 mass% or more and 22 mass% or less are more preferable, and 16 mass% or more and 20 mass% or less are especially preferable.

  Further, the compound represented by the general formula (IX-1-2) is preferably a compound represented by the formula (29.1) to the formula (29.4), and the formula (29.2) or the formula The compound represented by (29.4) is preferable.

  Furthermore, the compound represented by General Formula (IX) is preferably a compound represented by General Formula (IX-2).

(Wherein R ⁹ represents an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms, and X ⁹¹ and X ⁹² are each independently hydrogen. represents an atom or a fluorine atom, ^{Y 9} represents a fluorine atom, a chlorine atom or -OCF _3.)

  Although there is no restriction | limiting in the kind of compound which can be combined, Considering solubility at low temperature, transition temperature, electrical reliability, birefringence, etc., it uses combining suitably for every embodiment. For example, one embodiment of the present invention has one type, another embodiment has two types, yet another embodiment has three types, yet another embodiment has four types, and yet another embodiment has five types, In still another embodiment, six or more types are combined.

  Furthermore, the compound represented by General Formula (IX-2) is preferably a compound represented by General Formula (IX-2-1).

(In the formula, R ⁹ represents an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms.)

  Although there is no restriction | limiting in the kind of compound which can be combined, It is preferable to combine 1 type to 3 types in consideration of solubility at low temperature, transition temperature, electrical reliability, birefringence, etc.

  The content of the compound represented by the general formula (IX-2-1) is preferably an upper limit for each embodiment in consideration of properties such as solubility at low temperatures, transition temperature, electrical reliability, and birefringence. There is a value and a lower limit.

For example, in one embodiment of the present invention, the content of the compound is 1 to 40% by mass with respect to the total mass of the liquid crystal composition of the present invention. In another embodiment, the content of the compound is 2 to 40% by mass. In still another embodiment, the content of the compound is 4 to 40% by mass. In still another embodiment, the content of the compound is 10 to 10%. 40% by weight, in yet another embodiment the content of the compound is 14-40% by weight, in yet another embodiment the content of the compound is 16-40% by weight, and in yet another embodiment the content is The content of the compound is 21 to 40% by mass.

In addition, for example, in one embodiment of the present invention, the content of the compound is 1 to 40% by mass, and in another embodiment, the content of the compound is 1 to 35% by mass, and further to the total mass. In another embodiment, the content of the compound is 1 to 30% by mass. In still another embodiment, the content of the compound is 1 to 25% by mass. In still another embodiment, the content of the compound is 1 to 30% by mass. In still another embodiment, the content of the compound is 1 to 20% by mass, and in still another embodiment, the content of the compound is 1 to 10% by mass, and in still another embodiment, The content of the compound is 1 to 7% by mass, and in still another embodiment, the content of the compound is 1 to 5% by mass.

  Further, the compound represented by the general formula (IX-2-1) is preferably a compound represented by the formula (30.1) to the formula (30.4), from the formula (30.1) to the formula A compound represented by (30.2) is preferable.

  Furthermore, it is preferable that the compound represented by general formula (IX-2) is a compound represented by general formula (IX-2-2).

(In the formula, R ⁹ represents an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms.)

  Although there is no restriction | limiting in the kind of compound which can be combined, It is preferable to combine 1 type to 3 types in consideration of solubility at low temperature, transition temperature, electrical reliability, birefringence, etc. It is more preferable to combine the types.

  The content of the compound represented by the general formula (IX-2-2) is an upper limit for each embodiment in consideration of properties such as solubility at low temperatures, transition temperature, electrical reliability, and birefringence. There is a lower limit. For example, in one embodiment of the present invention, the content of the compound is 1 to 40% by mass relative to the total mass of the liquid crystal composition of the present invention, and in another embodiment, the content of the compound is 2 to 40% by mass. %, In still another embodiment the content of the compound is 4-40% by weight, in yet another embodiment the content of the compound is 10-40% by weight, and in yet another embodiment the content of the compound The amount is 14 to 40% by mass, and in still another embodiment, the content of the compound is 16 to 40% by mass, and in still another embodiment, the content of the compound is 21 to 40% by mass.

In addition, for example, in one embodiment of the present invention, the content of the compound is 1 to 40% by mass, and in another embodiment, the content of the compound is 1 to 35% by mass, and further to the total mass. In another embodiment, the content of the compound is 1 to 30% by mass. In still another embodiment, the content of the compound is 1 to 25% by mass. In still another embodiment, the content of the compound is 1 to 30% by mass. In still another embodiment, the content of the compound is 1 to 15% by mass. In still another embodiment, the content of the compound is 1 to 12% by mass. In still another embodiment, the content of the compound is 1 to 15% by mass. The content of the compound is 1 to 8% by mass, and in still another embodiment, the content of the compound is 1 to 4% by mass.

  Further, the compound represented by the general formula (IX-2-2) is preferably a compound represented by the formula (31.1) to the formula (31.4), and the formula (31.2) to the formula A compound represented by (31.4) is more preferred, and a compound represented by formula (31.2) is even more preferred.

In the liquid crystal composition of the present invention, the content of the compound represented by the formula (31.2) is preferably 1% by mass or more and 35% by mass or less based on the total mass of the liquid crystal composition of the present invention. It is more preferably 2% by mass or less and 25% by mass or less, further preferably 3% by mass or more and 20% by mass or less, particularly preferably 3% by mass or more and 15% by mass or less, and 3% by mass or more and 10% by mass or less. % Is most preferred. Among the most preferable ranges, for example, 3% by mass to 8% by mass, 3% by mass to 6% by mass, 3% by mass to 4% by mass, 4% by mass to 10% by mass, 6% by mass to 10% by mass. Hereinafter, 8 mass% or more and 10 mass% or less are mentioned.

In the liquid crystal composition of the present invention, the content of the compound represented by the formula (31.4) is preferably 1% by mass or more and 35% by mass or less with respect to the total mass of the liquid crystal composition of the present invention. It is more preferably 1% by mass or less and 25% by mass or less, more preferably 1% by mass or more and 15% by mass or less, more preferably 2% by mass or more and 10% by mass or less, and more preferably 3% by mass or more and 8% by mass. % Or less, more preferably 3% by mass or more and 6% by mass or less, and particularly preferably 3% by mass or more and 5% by mass or less.

  Furthermore, the compound represented by the general formula (IX-2) is preferably a compound represented by the general formula (IX-2-3).

(In the formula, R ⁹ represents an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms.)

  Although there is no restriction | limiting in the kind of compound which can be combined, It is preferable to combine 1 type or 2 types in consideration of solubility at low temperature, transition temperature, electrical reliability, birefringence and the like.

  The content of the compound represented by the general formula (IX-2-3) is based on the total mass of the liquid crystal composition of the present invention in consideration of solubility at a low temperature, transition temperature, electrical reliability, and the like. It is preferably 1% by mass to 30% by mass, more preferably 3% by mass to 20% by mass, further preferably 6% by mass to 15% by mass, and further preferably 8% by mass to 10% by mass. .

  Furthermore, the compound represented by the general formula (IX-2-3) is preferably a compound represented by the formula (32.1) to the formula (32.4), and the formula (32.2) and / or Or it is preferable that it is a compound represented by Formula (32.4).

  Furthermore, the compound represented by General Formula (IX-2) is preferably a compound represented by General Formula (IX-2-4).

(In the formula, R ⁹ represents an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms.)

  The content of the compound represented by the general formula (IX-2-4) is based on the total mass of the liquid crystal composition of the present invention in consideration of solubility at a low temperature, transition temperature, electrical reliability, and the like. It is preferably 1% by mass to 30% by mass, more preferably 3% by mass to 20% by mass, further preferably 6% by mass to 15% by mass, and particularly preferably 8% by mass to 10% by mass. .

  Further, the compound represented by the general formula (IX-2-4) is preferably a compound represented by the formula (33.1) to the formula (33.6), and the formula (33.1) and / or Or it is preferable that it is a compound represented by Formula (33.3).

  Furthermore, the compound represented by General Formula (IX-2) is preferably a compound represented by General Formula (IX-2-5).

(In the formula, R ⁹ represents an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms.)

  Although there is no restriction | limiting in the kind of compound which can be combined, Considering solubility at low temperature, transition temperature, electrical reliability, birefringence, etc., it uses combining suitably for every embodiment. For example, one embodiment of the present invention has one type, another embodiment has two types, yet another embodiment has three types, and yet another embodiment has four or more types.

  The content of the compound represented by the general formula (IX-2-5) is an upper limit for each embodiment in consideration of properties such as solubility at low temperatures, transition temperature, electrical reliability, and birefringence. There is a lower limit. For example, in one embodiment of the present invention, the content of the compound is 4 to 45% by mass with respect to the total mass of the liquid crystal composition of the present invention, and in another embodiment, the content of the compound is 8 to 45% by mass. %, In yet another embodiment the content of the compound is 12-45% by weight, in yet another embodiment the content of the compound is 21-45% by weight, and in yet another embodiment the content of the compound The amount is 30 to 45% by mass, and in still another embodiment, the content of the compound is 31 to 45% by mass, and in still another embodiment, the content of the compound is 34 to 45% by mass. In addition, for example, in one embodiment of the present invention, the content of the compound is 4 to 45% by mass in another embodiment of the present invention, and in another embodiment, the content of the compound is 4 to 40% by mass. In an embodiment of the present invention, the content of the compound is 4 to 35% by mass. In still another embodiment, the content of the compound is 4 to 32% by mass. In still another embodiment, the content of the compound is 4 to 4% by mass. In still another embodiment, the content of the compound is 4 to 13% by mass. In still another embodiment, the content of the compound is 4 to 9% by mass. In still another embodiment, the content of the compound is 4 to 13% by mass. The content of the compound is 4 to 8% by mass, and in still another embodiment, the content of the compound is 4 to 5% by mass.

  When the liquid crystal composition of the present invention maintains a low viscosity and a liquid crystal composition having a high response speed is required, it is preferable to lower the lower limit and lower the upper limit. Furthermore, when the liquid crystal composition of the present invention requires a high Tni and a liquid crystal composition that does not easily cause burn-in, it is preferable to lower the lower limit and lower the upper limit. Further, when it is desired to increase the dielectric anisotropy in order to keep the driving voltage low, it is preferable to increase the upper limit value while increasing the lower limit value.

  Furthermore, the compound represented by the general formula (IX-2-5) is preferably a compound represented by the formula (34.1) to the formula (34.5), and the formula (34.1), the formula A compound represented by (34.2), formula (34.3) and / or formula (34.5) is preferable.

  Furthermore, the compound represented by the general formula (IX) is preferably a compound represented by the general formula (IX-3).

(In the formula, R ⁹ represents an alkyl group having 1 to 5 carbon atoms or an alkenyl group having 2 to 5 carbon atoms, X ⁹¹ and X ⁹² each independently represent a hydrogen atom or a fluorine atom, and Y ⁹ represents Represents a fluorine atom, a chlorine atom or —OCF ₃ )

  Furthermore, it is preferable that the compound represented by general formula (IX-3) is a compound represented by general formula (IX-3-1).

(In the formula, R ⁹ represents an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms.)

  Although there is no restriction | limiting in the kind of compound which can be combined, It is preferable to combine 1 type or 2 types in consideration of solubility at low temperature, transition temperature, electrical reliability, birefringence and the like.

  The content of the compound represented by the general formula (IX-3-1) is based on the total mass of the liquid crystal composition of the present invention in consideration of solubility at a low temperature, transition temperature, electrical reliability, and the like. It is preferably 3% by mass or more and 30% by mass or less, more preferably 7% by mass or more and 30% by mass or less, further preferably 13% by mass or more and 20% by mass or less, and particularly preferably 15% by mass or more and 18% by mass or less. .

  Furthermore, the compound represented by the general formula (IX-3-1) is preferably a compound represented by the formula (35.1) to the formula (35.4), and the formula (35.1) and / or Or it is preferable that it is a compound represented by Formula (35.2).

  Furthermore, it is preferable that the compound represented by general formula (M) is a compound represented by general formula (X).

(In the formula, X ¹⁰¹ to X ¹⁰⁴ each independently represents a fluorine atom or a hydrogen atom, Y ¹⁰ represents a fluorine atom, a chlorine atom or —OCF ₃ , and Q ¹⁰ represents a single bond or —CF ₂ O—. , R ¹⁰ represents an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms, and A ¹⁰¹ and A ¹⁰² are each independently 1, 4 -Cyclohexylene group, 1,4-phenylene group, or

However, the hydrogen atom on the 1,4-phenylene group may be substituted with a fluorine atom. )

  Although there is no restriction | limiting in particular in the compound which can be combined, It combines suitably for every embodiment in consideration of solubility at low temperature, transition temperature, electrical reliability, birefringence, etc. For example, in one embodiment of the present invention, there is one. In another embodiment of the present invention, there are two types. In still another embodiment, there are three types. In still another embodiment, there are four types. In still another embodiment, there are five or more types.

  The content of the compound represented by the general formula (X) has an upper limit value and a lower limit value for each embodiment in consideration of properties such as solubility at low temperatures, transition temperature, electrical reliability, and birefringence. is there. For example, in one embodiment of the present invention, the content of the compound is 2 to 45% by mass with respect to the total mass of the liquid crystal composition of the present invention, and in another embodiment, the content of the compound is 3 to 45% by mass. %, In yet another embodiment the content of the compound is 6-45% by weight, in yet another embodiment the content of the compound is 8-45% by weight, and in yet another embodiment the content of the compound The amount is 9 to 45% by mass, and in still another embodiment, the content of the compound is 11 to 45% by mass, and in still another embodiment, the content of the compound is 12 to 45% by mass. In still another embodiment, the content of the compound is 18% to 45% by mass. In still another embodiment, the content of the compound is 19% to 45% by mass. In still another embodiment, the content of the compound is 23% to 45% by mass. In still another embodiment, the content of the compound is 25% to 45% by mass. Further, for example, in one embodiment of the present invention, the content of the compound is 2 to 45% by mass in another embodiment of the present invention, and in another embodiment, the content of the compound is 2 to 35% by mass. In another embodiment, the content of the compound is 2 to 30% by mass. In still another embodiment, the content of the compound is 2 to 25% by mass. In still another embodiment, the content of the compound is 2 to 2% by mass. In still another embodiment, the content of the compound is 2 to 13% by mass. In still another embodiment, the content of the compound is 2 to 9% by mass. In still another embodiment, the content of the compound is 2 to 13% by mass. The content of the compound is 2 to 6% by mass, and in still another embodiment, the content of the compound is 2 to 3% by mass.

  When the liquid crystal composition of the present invention maintains a low viscosity and a liquid crystal composition having a high response speed is required, it is preferable to lower the lower limit and lower the upper limit. Furthermore, when a liquid crystal composition that does not easily cause burn-in is required, it is preferable to lower the lower limit value and lower the upper limit value. Further, when it is desired to increase the dielectric anisotropy in order to keep the driving voltage low, it is preferable to increase the upper limit value while increasing the lower limit value.

  The compound represented by the general formula (X) used in the liquid crystal composition of the present invention is preferably a compound represented by the general formula (X-1).

(In the formula, X ¹⁰¹ to X ¹⁰³ each independently represent a fluorine atom or a hydrogen atom, and R ¹⁰ represents an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms, or 1 to 1 carbon atoms. 4 represents an alkoxy group, except for the compound represented by formula (i).

  Although there is no restriction | limiting in particular in the compound which can be combined, It combines suitably for every embodiment in consideration of solubility at low temperature, transition temperature, electrical reliability, birefringence, etc. For example, in one embodiment of the present invention, there is one. In another embodiment of the present invention, there are two types. In still another embodiment, there are three types. In still another embodiment, there are four types. In still another embodiment, there are five or more types.

  The content of the compound represented by the general formula (X-1) is an upper limit and a lower limit for each embodiment in consideration of properties such as solubility at low temperatures, transition temperature, electrical reliability, and birefringence. There is a value. For example, in one embodiment of the present invention, the content of the compound is 2 to 40% by mass relative to the total mass of the liquid crystal composition of the present invention, and in another embodiment, the content of the compound is 3 to 40% by mass. %, In yet another embodiment the content of the compound is 5-40% by weight, in yet another embodiment the content of the compound is 6-40% by weight, and in yet another embodiment the content of the compound The amount is 7-40% by mass, and in yet another embodiment the content of the compound is 8-40% by mass, and in yet another embodiment the content of the compound is 9-40% by mass. In still another embodiment, the content of the compound is 13% to 40% by mass. In still another embodiment, the content of the compound is 18% to 40% by mass. In still another embodiment, the content of the compound is 23% to 40% by mass.

  In addition, for example, in one embodiment of the present invention, the content of the compound is 2 to 40% by mass, and in another embodiment, the content of the compound is 2 to 30% by mass, and further to the total mass. In an embodiment of the present invention, the content of the compound is 2 to 25% by mass. In still another embodiment, the content of the compound is 2 to 20% by mass. In still another embodiment, the content of the compound is 2 to 2% by mass. 15% by weight, in yet another embodiment the content of the compound is 2-10% by weight, in yet another embodiment the content of the compound is 2-6% by weight, and in yet another embodiment the content is The content of the compound is 2 to 4% by mass.

  Furthermore, it is preferable that the compound represented by general formula (X-1) used for the liquid-crystal composition of this invention is a compound represented by general formula (X-1-1).

(In the formula, R ¹⁰ represents an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms.)

  Although there is no restriction | limiting in particular in the compound which can be combined, It combines suitably for every embodiment in consideration of solubility at low temperature, transition temperature, electrical reliability, birefringence, etc. For example, in one embodiment of the present invention, there is one. In another embodiment of the present invention, there are two types. In still another embodiment, there are three types. In still another embodiment, there are four or more types.

  The content of the compound represented by the general formula (X-1-1) is an upper limit for each embodiment in consideration of properties such as solubility at low temperatures, transition temperature, electrical reliability, and birefringence. There is a lower limit. For example, in one embodiment of the present invention, the content of the compound is 3 to 30% by mass with respect to the total mass of the liquid crystal composition of the present invention, and in another embodiment, the content of the compound is 4 to 30%. In still another embodiment, the content of the compound is 6 to 30% by mass. In still another embodiment, the content of the compound is 9 to 30% by mass. In still another embodiment, the content of the compound is The content is 12-30% by mass, and in still another embodiment, the content of the compound is 15-30% by mass, and in still another embodiment, the content of the compound is 18-30% by mass. In still another embodiment, the content of the compound is 21% to 30% by mass.

  In addition, for example, in one embodiment of the present invention, the content of the compound is 3 to 30% by mass with respect to the total mass, and in another embodiment, the content of the compound is 3 to 20% by mass. In another embodiment, the content of the compound is 3 to 13% by mass. In still another embodiment, the content of the compound is 3 to 10% by mass. In still another embodiment, the content of the compound is 3 to 3% by mass. 7% by mass.

  Furthermore, the compound represented by the general formula (X-1-1) used in the liquid crystal composition of the present invention is specifically a compound represented by the formula (36.1) to the formula (36.4). Among them, it is preferable to contain a compound represented by formula (36.1) and / or formula (36.2).

Furthermore, it is preferable that the compound represented by general formula (X-1) used for the liquid-crystal composition of this invention is a compound represented by general formula (X-1-2).

(In the formula, R ¹⁰ represents an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms.)

The content of the compound represented by the general formula (X-1-2) is based on the total mass of the liquid crystal composition of the present invention in consideration of solubility at a low temperature, transition temperature, electrical reliability, and the like. It is preferably 1% by mass or more and 20% by mass or less, more preferably 2% by mass or more and 16% by mass or less, further preferably 2% by mass or more and 12% by mass or less, and further preferably 2% by mass or more and 10% by mass or less. .

Furthermore, the compound represented by the general formula (X-1-2) used in the liquid crystal composition of the present invention is specifically a compound represented by the formula (37.1) to the formula (37.4). In particular, it is preferable to contain a compound represented by the formula (37.2).

In the liquid crystal composition of the present invention, the content of the compound represented by the formula (37.2) is determined in consideration of solubility at a low temperature, transition temperature, electrical reliability, and the like. The total mass is preferably 1% by mass or more and 20% by mass or less, more preferably 2% by mass or more and 15% by mass or less, further preferably 2% by mass or more and 10% by mass or less, and 2% by mass or more and 6% by mass or less. % Or less is particularly preferable.

Furthermore, it is preferable that the compound represented by general formula (X-1) used for the liquid-crystal composition of this invention is a compound represented by general formula (X-1-3).

(In the formula, R ¹⁰ represents an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms.)

There are no particular limitations on the compounds that can be combined, but it is preferable to combine one or more of them in consideration of solubility at low temperatures, transition temperature, electrical reliability, birefringence, and the like.

The content of the compound represented by the general formula (X-1-3) is preferably 1% by mass or more, more preferably 2% by mass or more, based on the total mass of the liquid crystal composition of the present invention. The mass% or more is more preferable. In consideration of solubility at low temperatures, transition temperature, electrical reliability, etc., the maximum ratio is preferably 20% by mass or less, more preferably 16% by mass or less, and even more preferably 12% by mass or less. 10 mass% or less is especially preferable.

Furthermore, the compound represented by the general formula (X-1-3) used in the liquid crystal composition of the present invention is specifically a compound represented by the formula (38.1) to the formula (38.4). In particular, it is preferable to contain a compound represented by the formula (38.2).

In the liquid crystal composition of the present invention, the content of the compound represented by the formula (38.2) is preferably 1% by mass or more and 35% by mass or less based on the total mass of the liquid crystal composition of the present invention. It is more preferably 2% by mass or less and 25% by mass or less, more preferably 3% by mass or more and 20% by mass or less, more preferably 3% by mass or more and 15% by mass or less, and more preferably 3% by mass or more and 10% by mass. % Or less, more preferably 3% by mass or more and 8% by mass or less, and particularly preferably 4% by mass or more and 5% by mass or less.

  It is preferable that the compound represented by general formula (X) used for the liquid-crystal composition of this invention is a compound represented by general formula (X-2).

(Wherein X ¹⁰² to X ¹⁰³ each independently represent a fluorine atom or a hydrogen atom, Y ¹⁰ represents a fluorine atom, a chlorine atom, or —OCF ₃ , R ¹⁰ represents an alkyl group having 1 to 5 carbon atoms, Represents an alkenyl group having 2 to 5 carbon atoms or an alkoxy group having 1 to 4 carbon atoms.)

  There are no particular limitations on the compounds that can be combined, but it is preferable to combine one or more of them in consideration of solubility at low temperatures, transition temperature, electrical reliability, birefringence, and the like.

  Furthermore, the compound represented by General Formula (X-2) used in the liquid crystal composition of the present invention is preferably a compound represented by General Formula (X-2-1).

(In the formula, R ¹⁰ represents an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms.)

  There are no particular limitations on the compounds that can be combined, but it is preferable to combine one or more types in consideration of solubility at low temperatures, transition temperature, electrical reliability, birefringence, etc. It is more preferable to combine more than one type.

  The content of the compound represented by the general formula (X-2-1) is based on the total mass of the liquid crystal composition of the present invention in consideration of solubility at a low temperature, transition temperature, electrical reliability, and the like. 3 mass% or more and 20 mass% or less is preferable, 6 mass% or more and 16 mass% or less is more preferable, 9 mass% or more and 12 mass% or less is more preferable, and 9 mass% or more and 10 mass% or less is especially preferable. .

  Furthermore, the compound represented by the general formula (X-2-1) used in the liquid crystal composition of the present invention is specifically a compound represented by the formula (39.1) to the formula (39.4). In particular, it is preferable to contain a compound represented by the formula (39.2).

In the liquid crystal composition of the present invention, the content of the compound represented by the formula (39.2) is preferably 1% by mass or more and 35% by mass or less with respect to the total mass of the liquid crystal composition of the present invention. It is more preferably 2% by mass or less and 25% by mass or less, more preferably 3% by mass or more and 20% by mass or less, more preferably 3% by mass or more and 15% by mass or less, and more preferably 3% by mass or more and 10% by mass. % Or more, more preferably 4% by mass or more and 8% by mass or less, and particularly preferably 4% by mass or more and 6% by mass or less.

  Furthermore, it is preferable that the compound represented by general formula (X-2) used for the liquid-crystal composition of this invention is a compound represented by general formula (X-2-2).

(In the formula, R ¹⁰ represents an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms.)

There are no particular limitations on the compounds that can be combined, but it is preferable to combine one or more of them in consideration of solubility at low temperatures, transition temperature, electrical reliability, birefringence, and the like.
The content of the compound represented by the general formula (X-2-2) is based on the total mass of the liquid crystal composition of the present invention in consideration of solubility at a low temperature, transition temperature, electrical reliability, and the like. 3 mass% or more and 20 mass% or less is preferable, 6 mass% or more and 16 mass% or less is more preferable, 9 mass% or more and 12 mass% or less is more preferable, and 9 mass% or more and 10 mass% or less is especially preferable. .

  Furthermore, the compound represented by the general formula (X-2-2) used in the liquid crystal composition of the present invention is specifically a compound represented by the formula (40.1) to the formula (40.4). In particular, it is preferable to contain a compound represented by the formula (40.2).

  Furthermore, it is preferable that the compound represented by general formula (X) is a compound represented by general formula (X-4).

(In the formula, X ¹⁰² represents a fluorine atom or a hydrogen atom, and R ¹⁰ represents an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms. )

  There are no particular limitations on the compounds that can be combined, but it is preferable to combine one or more types in consideration of solubility at low temperatures, transition temperature, electrical reliability, birefringence, etc. It is more preferable to combine more than one type.

  Furthermore, it is preferable that the compound represented by general formula (X-4) used for the liquid-crystal composition of this invention is a compound represented by general formula (X-4-1).

(In the formula, R ¹⁰ represents an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms.)

  There are no particular limitations on the compounds that can be combined, but it is preferable to combine one or more types in consideration of solubility at low temperatures, transition temperature, electrical reliability, birefringence, etc. It is more preferable to combine more than one type.

  The content of the compound represented by the general formula (X-4-1) is based on the total mass of the liquid crystal composition of the present invention in consideration of solubility at a low temperature, transition temperature, electrical reliability, and the like. It is preferably 2% by mass or more and 20% by mass or less, more preferably 5% by mass or more and 17% by mass or less, further preferably 10% by mass or more and 15% by mass or less, and particularly preferably 10% by mass or more and 13% by mass or less. .

  Furthermore, the compound represented by the general formula (X-4-1) used in the liquid crystal composition of the present invention is specifically a compound represented by the formula (42.1) to the formula (42.4). In particular, it is preferable to contain a compound represented by the formula (42.2).

Furthermore, it is preferable that the compound represented by general formula (X) used for the liquid-crystal composition of this invention is a compound represented by general formula (X-4-2).

(In the formula, R ¹⁰ represents an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms.)

There are no particular limitations on the compounds that can be combined, but it is preferable to combine one or more types in consideration of solubility at low temperatures, transition temperature, electrical reliability, birefringence, etc. It is more preferable to combine more than one type.

  The content of the compound represented by the general formula (X-4-2) is based on the total mass of the liquid crystal composition of the present invention in consideration of solubility at a low temperature, transition temperature, electrical reliability, and the like. It is preferably 2% by mass or more and 20% by mass or less, more preferably 5% by mass or more and 17% by mass or less, further preferably 10% by mass or more and 15% by mass or less, and particularly preferably 10% by mass or more and 13% by mass or less. .

Furthermore, the compound represented by the general formula (X-4-2) used in the liquid crystal composition of the present invention is specifically a compound represented by the formula (42.11) to the formula (42.14). In particular, it is more preferable to contain a compound represented by the formula (42.13) or the formula (42.14).

Furthermore, it is preferable that the compound represented by general formula (X) used for the liquid-crystal composition of this invention is a compound represented by general formula (X-4-3).

(In the formula, R ¹⁰ represents an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms.)

There are no particular limitations on the compounds that can be combined, but it is preferable to combine one or more types in consideration of solubility at low temperatures, transition temperature, electrical reliability, birefringence, etc. It is more preferable to combine more than one type.

The content of the compound represented by the general formula (X-4-3) is based on the total mass of the liquid crystal composition of the present invention in consideration of solubility at a low temperature, transition temperature, electrical reliability, and the like. It is preferably 2% by mass or more and 20% by mass or less, more preferably 5% by mass or more and 17% by mass or less, further preferably 10% by mass or more and 15% by mass or less, and particularly preferably 10% by mass or more and 13% by mass or less. .

Furthermore, the compound represented by general formula (X-4-3) used in the liquid crystal composition of the present invention is specifically a compound represented by formula (42.21) to formula (42.24). In particular, it is more preferable to contain a compound represented by the formula (42.22).

  Furthermore, it is preferable that the compound represented by general formula (X) is a compound represented by general formula (X-5).

(In the formula, X ¹⁰² represents a fluorine atom or a hydrogen atom, and R ¹⁰ represents an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms. )

  There are no particular limitations on the compounds that can be combined, but it is preferable to combine one or more types in consideration of solubility at low temperatures, transition temperature, electrical reliability, birefringence, etc. It is more preferable to combine more than one type.

  Furthermore, the compound represented by General Formula (X-5) used in the liquid crystal composition of the present invention is preferably a compound represented by General Formula (X-5-1).

(In the formula, R ¹⁰ represents an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms.)

  There are no particular limitations on the compounds that can be combined, but it is preferable to combine one or more types in consideration of solubility at low temperatures, transition temperature, electrical reliability, birefringence, etc. It is more preferable to combine more than one type.

  Furthermore, the compounds represented by the general formula (X-5-1) used in the liquid crystal composition of the present invention are specifically compounds represented by the formulas (43.1) to (43.4). In particular, it is preferable to contain a compound represented by the formula (43.2).

  The compound represented by the general formula (X) used in the liquid crystal composition of the present invention is preferably a compound represented by the general formula (X-6).

(In the formula, R ¹⁰ represents an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms.)

  There are no particular limitations on the compounds that can be combined, but it is preferable to combine one or more of them in consideration of solubility at low temperatures, transition temperature, electrical reliability, birefringence, and the like.

  The content of the compound represented by the general formula (X-6) is an upper limit and a lower limit for each embodiment in consideration of properties such as solubility at low temperature, transition temperature, electrical reliability, and birefringence. There is a value. For example, in one embodiment of the present invention, the content of the compound is 4 to 30% by mass with respect to the total mass of the liquid crystal composition of the present invention, 5 to 30% by mass in another embodiment, and yet another implementation. 6-30% by weight in a form, 8-30% by weight in yet another embodiment, 9-30% by weight in yet another embodiment, 11-30% by weight in yet another embodiment, and yet another In the embodiment, the content is 14 to 30% by mass. In still another embodiment, the content is 18 to 30% by mass.

  Also, for example, in one embodiment of the present invention, the content of the compound is 1 to 30% by mass, in another embodiment 1 to 20% by mass, and further to the total mass of the liquid crystal composition of the present invention. In another embodiment 1-13 wt%, in yet another embodiment 1-10 wt%, in yet another embodiment 1-7 wt%, and in yet another embodiment 1-3 wt%. is there.

  Furthermore, the compound represented by the general formula (X-6) used in the liquid crystal composition of the present invention is specifically a compound represented by the formula (44.1) to the formula (44.4). Among them, it is preferable to contain a compound represented by formula (44.1) and / or formula (44.2).

  Moreover, you may make the liquid crystal compound of this invention contain the compound represented by general formula (X-7) which is a compound similar to the compound represented by general formula (X).

(In the formula, R ¹⁰ represents an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms.)

  There are no particular limitations on the compounds that can be combined, but it is preferable to combine one or more of them in consideration of solubility at low temperatures, transition temperature, electrical reliability, birefringence, and the like.

The content of the compound represented by the general formula (X-7) is an upper limit and a lower limit for each embodiment in consideration of properties such as solubility at low temperature, transition temperature, electrical reliability, and birefringence. There is a value.

For example, in one embodiment of the present invention, the content of the compound is 4 to 30% by mass with respect to the total mass of the liquid crystal composition of the present invention, and in another embodiment, the content of the compound is 5 to 30%. In still another embodiment, the content of the compound is 6 to 30% by mass. In still another embodiment, the content of the compound is 8 to 30% by mass. In still another embodiment, the content of the compound is 5% by mass. The content is 9-30% by mass, and in still another embodiment, the content of the compound is 11-30% by mass, and in still another embodiment, the content of the compound is 14-30% by mass. In still another embodiment, the content of the compound is 18% to 30% by mass.

In addition, for example, in one embodiment of the present invention, the content of the compound is 4 to 30% by mass in another embodiment of the present invention, and in another embodiment, the content of the compound is 4 to 20% by mass. In an embodiment of the present invention, the content of the compound is 4 to 13% by mass. In still another embodiment, the content of the compound is 4 to 10% by mass. In still another embodiment, the content of the compound is 4 to 4% by mass. 7% by weight, and in yet another embodiment 3% by weight.

Furthermore, the compound represented by the general formula (X-7) used in the liquid crystal composition of the present invention is specifically a compound represented by the formula (44.11) to the formula (44.14). In particular, it is more preferable to contain a compound represented by the formula (44.13).

  Furthermore, the compound represented by the general formula (X) is preferably a compound selected from the group represented by the general formula (XI).

(Wherein X ¹¹¹ to X ¹¹⁷ each independently represents a fluorine atom or a hydrogen atom, at least one of X ¹¹¹ to X ¹¹⁷ represents a fluorine atom, R ¹¹ represents an alkyl group having 1 to 5 carbon atoms, an alkenyl group or an alkoxy group having 1 to 4 carbon atoms 2 to 5 carbon ^{atoms, Y 11} represents a fluorine atom or -OCF _3.)

  There are no particular limitations on the compounds that can be combined, but it is preferable to combine one to three or more in consideration of solubility at low temperatures, transition temperature, electrical reliability, birefringence, and the like.

  The content of the compound represented by the general formula (XI) has an upper limit value and a lower limit value for each embodiment in consideration of properties such as solubility at low temperature, transition temperature, electrical reliability, and birefringence. is there. For example, in one embodiment of the present invention, the content of the compound is 2 to 30% by mass with respect to the total mass of the liquid crystal composition of the present invention, and in another embodiment, the content of the compound is 4 to 30%. In still another embodiment, the content of the compound is 5 to 30% by mass. In still another embodiment, the content of the compound is 7 to 30% by mass. In still another embodiment, the content of the compound is 5% by mass. The content is 9-30% by mass, and in still another embodiment, the content of the compound is 10-30% by mass, and in still another embodiment, the content of the compound is 12-30% by mass. In still another embodiment, the content of the compound is 13% to 30% by mass. In still another embodiment, the content of the compound is 15% to 30% by mass. In still another embodiment, the content of the compound is 18% to 30% by mass.

  In addition, for example, in one embodiment of the present invention, the content of the compound is 2 to 30% by mass, and in another embodiment, the content of the compound is 2 to 25% by mass, and is different from the total mass. In an embodiment of the present invention, the content of the compound is 2 to 20% by mass. In still another embodiment, the content of the compound is 2 to 15% by mass. In still another embodiment, the content of the compound is 2 to 2% by mass. In still another embodiment, the content of the compound is 2 to 5% by mass.

  When the liquid crystal composition of the present invention is used for a liquid crystal display device having a small cell gap, it is suitable to increase the content of the compound represented by the general formula (XI). When used for a liquid crystal display element with a low driving voltage, it is suitable to increase the content of the compound represented by the general formula (XI). Further, when used for a liquid crystal display element used in a low temperature environment, it is suitable to reduce the content of the compound represented by the general formula (XI). In the case of a liquid crystal composition used for a liquid crystal display device having a high response speed, it is suitable to reduce the content of the compound represented by the general formula (XI).

  Furthermore, it is preferable that the compound represented by general formula (XI) used for the liquid-crystal composition of this invention is a compound represented by general formula (XI-1).

(In the formula, R ¹¹ represents an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms.)

  Although there is no restriction | limiting in particular in the compound which can be combined, In consideration of solubility at low temperature, transition temperature, electrical reliability, birefringence, etc., it combines suitably for every embodiment. For example, in one embodiment of the present invention, one type is combined, in another embodiment, two types, and in another embodiment, three or more types are combined.

The content of the compound represented by the general formula (XI-1) is 1 with respect to the total mass of the liquid crystal composition of the present invention in consideration of solubility at a low temperature, transition temperature, electrical reliability, and the like. It is preferably from 20% by mass to 20% by mass, more preferably from 3% by mass to 20% by mass, further preferably from 4% by mass to 20% by mass, further preferably from 6% by mass to 15% by mass, A mass% or more and 12 mass% or less is particularly preferable.

Furthermore, the compound represented by the general formula (XI-1) used in the liquid crystal composition of the present invention is specifically a compound represented by the formula (45.1) to the formula (45.4). Among them, it is preferable to contain a compound represented by formula (45.2) to formula (45.4), and it is more preferable to contain a compound represented by formula (45.2).

  In the liquid crystal composition of the present invention, the content of the compound represented by formula (45.4) is determined in consideration of solubility at low temperatures, transition temperature, electrical reliability, and the like. The total mass is preferably 1% by mass or more and 25% by mass or less, more preferably 3% by mass or more and 20% by mass or less, further preferably 3% by mass or more and 15% by mass or less, and more preferably 3% by mass or more and 10% by mass. % Or less is particularly preferable.

  Furthermore, the compound represented by General Formula (XI) used in the liquid crystal composition of the present invention is preferably a compound represented by General Formula (XI-2).

(Wherein R ¹¹⁰ represents an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms.)

Although there is no restriction | limiting in particular in the compound which can be combined, In consideration of solubility at low temperature, transition temperature, electrical reliability, birefringence, etc., it combines suitably for every embodiment. For example, in one embodiment of the present invention, one type is combined, in another embodiment, two types, and in another embodiment, three or more types are combined.

  The content of the compound represented by the general formula (XI-2) is 1 with respect to the total mass of the liquid crystal composition of the present invention in consideration of solubility at a low temperature, transition temperature, electrical reliability, and the like. It is preferably from 20% by mass to 20% by mass, more preferably from 3% by mass to 20% by mass, further preferably from 4% by mass to 20% by mass, further preferably from 6% by mass to 15% by mass, A mass% or more and 12 mass% or less is particularly preferable.

  Furthermore, the compound represented by General Formula (XI-2) used in the liquid crystal composition of the present invention is specifically a compound represented by Formula (45.11) to Formula (45.14). Among them, it is preferable to contain a compound represented by formula (45.12) to formula (45.14), and it is more preferable to contain a compound represented by formula (45.12).

  Furthermore, the compound represented by the general formula (X) is preferably a compound selected from the group represented by the general formula (XII).

(Wherein X ¹²¹ to X ¹²⁶ each independently represent a fluorine atom or a hydrogen atom, and R ¹²⁰ represents an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms, or 1 to 1 carbon atoms. 4 represents an alkoxy group, and Y ¹² represents a fluorine atom or —OCF _3. )

  There are no particular limitations on the compounds that can be combined, but it is preferable to combine one to three or more in consideration of solubility at low temperatures, transition temperature, electrical reliability, birefringence, and the like. It is more preferable to combine more than one type.

  Furthermore, it is preferable that the compound represented by general formula (XII) used for the liquid-crystal composition of this invention is a compound represented by general formula (XII-1).

(Wherein R ¹²⁰ represents an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms.)

  There are no particular limitations on the compounds that can be combined, but it is preferable to combine one or more types in consideration of solubility at low temperatures, transition temperature, electrical reliability, birefringence, etc. It is more preferable to combine more than one type.

  The content of the compound represented by the general formula (XII-1) is 1 with respect to the total mass of the liquid crystal composition of the present invention in consideration of solubility at a low temperature, transition temperature, electrical reliability, and the like. It is preferably from 15% by weight to 15% by weight, more preferably from 2% by weight to 10% by weight, further preferably from 3% by weight to 8% by weight, and particularly preferably from 4% by weight to 6% by weight.

  Furthermore, the compound represented by the general formula (XII-1) used in the liquid crystal composition of the present invention is specifically a compound represented by the formula (46.1) to the formula (46.4). Among them, it is preferable to contain a compound represented by formula (46.2) to formula (46.4).

  Furthermore, it is preferable that the compound represented by general formula (XII) is a compound represented by general formula (XII-2).

(Wherein R ¹²⁰ represents an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms.)

  There are no particular limitations on the compounds that can be combined, but it is preferable to combine one or more types in consideration of solubility at low temperatures, transition temperature, electrical reliability, birefringence, etc. It is more preferable to combine more than one type.

  The content of the compound represented by the general formula (XII-2) is 1 with respect to the total mass of the liquid crystal composition of the present invention in consideration of solubility at a low temperature, transition temperature, electrical reliability, and the like. It is preferably from 20% by mass to 20% by mass, more preferably from 3% by mass to 20% by mass, further preferably from 4% by mass to 17% by mass, further preferably from 6% by mass to 15% by mass, A mass% or more and 13 mass% or less is particularly preferable.

  Furthermore, the compound represented by the general formula (XII-2) used in the liquid crystal composition of the present invention is specifically a compound represented by the formula (47.1) to the formula (47.4). Among them, it is preferable to contain a compound represented by formula (47.2) to formula (47.4).

  Furthermore, it is preferable that the compound represented by general formula (M) is a compound chosen from the compound group represented by general formula (XIII).

(In the formula, X ¹³¹ to X ¹³⁵ each independently represent a fluorine atom or a hydrogen atom, and R ¹³ represents an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms, or 1 to 1 carbon atoms. 4 represents an alkoxy group, and Y ¹³ represents a fluorine atom or —OCF ₃ except for the compound represented by the general formula (ii).

  Although there is no restriction | limiting in particular in the kind of compound which can be combined, It is preferable to contain 1 type-2 types from these compounds, It is more preferable to contain 1 type-3 types, It contains 1 type-4 types. More preferably.

  The content of the compound represented by the general formula (XIII) has an upper limit value and a lower limit value for each embodiment in consideration of properties such as solubility at low temperature, transition temperature, electrical reliability, and birefringence. is there.

For example, in one embodiment of the present invention, the content of the compound is 2 to 30% by mass with respect to the total mass of the liquid crystal composition of the present invention, and in another embodiment, the content of the compound is 4 to 30%. In still another embodiment, the content of the compound is 5 to 30% by mass. In still another embodiment, the content of the compound is 7 to 30% by mass. In still another embodiment, the content of the compound is 5% by mass. The content is 9-30% by mass, and in still another embodiment, the content of the compound is 11-30% by mass, and in still another embodiment, the content of the compound is 13-30% by mass. In still another embodiment, the content of the compound is 14% to 30% by mass. In still another embodiment, the content of the compound is 16% to 30% by mass. In still another embodiment, the content of the compound is 20% to 30% by mass.

  In addition, for example, in one embodiment of the present invention, the content of the compound is 2 to 30% by mass, and in another embodiment, the content of the compound is 2 to 25% by mass, and is different from the total mass. In an embodiment of the present invention, the content of the compound is 2 to 20% by mass. In still another embodiment, the content of the compound is 2 to 15% by mass. In still another embodiment, the content of the compound is 2 to 2% by mass. In still another embodiment, the content of the compound is 2 to 5% by mass.

  When the liquid crystal composition of the present invention is used for a liquid crystal display device having a small cell gap, it is suitable to increase the content of the compound represented by the general formula (XIII). When used for a liquid crystal display element having a low driving voltage, it is suitable to increase the content of the compound represented by the general formula (XIII). In addition, when used for a liquid crystal display element used in a low temperature environment, it is suitable to reduce the content of the compound represented by the general formula (XIII). In the case of a liquid crystal composition used for a liquid crystal display device having a high response speed, it is suitable to reduce the content of the compound represented by the general formula (XIII).

  Furthermore, the compound represented by General Formula (XIII) is preferably a compound represented by General Formula (XIII-1).

(In the formula, R ¹³ represents an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms.)

  The compound represented by the general formula (XIII-1) is preferably contained in an amount of 1% by mass to 25% by mass with respect to the total mass of the liquid crystal composition of the present invention, and preferably 3% by mass or more and 25% by mass or less. Is more preferable, 5 to 20% by mass is further preferable, and 10 to 15% by mass is particularly preferable.

  Furthermore, the compound represented by the general formula (XIII-1) is preferably a compound represented by the formula (48.1) to the formula (48.4), and is represented by the formula (48.2). A compound is preferred.

  Furthermore, it is preferable that the compound represented by general formula (M) is a compound chosen from the compound group represented by general formula (XIV).

(Wherein R ¹⁴ represents an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms, and X ¹⁴¹ to X ¹⁴⁴ are each independently fluorine. Y ¹⁴ represents an atom or a hydrogen atom, Y ¹⁴ represents a fluorine atom, a chlorine atom or —OCF ₃ , Q ¹⁴ represents a single bond, —COO— or —CF ₂ O—, and m ¹⁴ is 0 or 1. And the compound represented by the general formula (i) is excluded.)

  Although there is no restriction | limiting in the kind of compound which can be combined, It combines suitably for every embodiment in consideration of solubility at low temperature, transition temperature, electrical reliability, birefringence, etc. For example, in one embodiment of the present invention, there is one. Furthermore, in another embodiment of this invention, they are two types. Or in another embodiment of this invention, they are three types. In still another embodiment of the present invention, there are four types. Or in another embodiment of this invention, they are five types. Or in another embodiment of this invention, they are six or more types.

  The content of the compound represented by the general formula (XIV) has an upper limit value and a lower limit value for each embodiment in consideration of properties such as solubility at low temperature, transition temperature, electrical reliability, and birefringence. is there.

For example, in one embodiment of the present invention, the content of the compound is 3 to 40% by mass relative to the total mass of the liquid crystal composition of the present invention, and in another embodiment, the content of the compound is 7 to 40%. In still another embodiment, the content of the compound is 8 to 40% by mass. In still another embodiment, the content of the compound is 11 to 40% by mass. In still another embodiment, the content of the compound is The content is 12 to 40% by mass, and in still another embodiment, the content of the compound is 16 to 40% by mass, and in still another embodiment, the content of the compound is 18 to 40% by mass. In still another embodiment, the content of the compound is 19% to 40% by mass. In still another embodiment, the content of the compound is 22% to 40% by mass. In still another embodiment, the content of the compound is 25% to 40% by mass.

In addition, for example, in one embodiment of the present invention, the content of the compound is 3 to 40% by mass in another embodiment of the present invention, and in another embodiment, the content of the compound is 3 to 35% by mass. In another embodiment, the content of the compound is 3 to 30% by mass. In still another embodiment, the content of the compound is 3 to 25% by mass. In still another embodiment, the content of the compound is 3 to 3% by mass. In still another embodiment, the content of the compound is 3 to 15% by mass.

  When the liquid crystal composition of the present invention is used for a liquid crystal display element having a low driving voltage, it is suitable to increase the content of the compound represented by the general formula (XIV). In the case of a liquid crystal composition used for a liquid crystal display device having a high response speed, it is suitable to reduce the content of the compound represented by the general formula (XIV).

  Furthermore, the compound represented by General Formula (XIV) is preferably a compound represented by General Formula (XIV-1).

(In the formula, R ¹⁴ represents an alkyl group having 1 to 7 carbon atoms, an alkenyl group having 2 to 7 carbon atoms, or an alkoxy group having 1 to 7 carbon atoms, and Y ¹⁴ represents a fluorine atom, a chlorine atom, or —OCF ₃ )

  Although there is no restriction | limiting in the kind of compound which can be combined, It is preferable to combine 1 type to 3 types in consideration of solubility at low temperature, transition temperature, electrical reliability, birefringence, etc.

  Furthermore, it is preferable that the compound represented by general formula (XIV-1) is a compound represented by general formula (XIV-1-1).

(In the formula, R ¹⁴ represents an alkyl group having 1 to 7 carbon atoms, an alkenyl group having 2 to 7 carbon atoms, or an alkoxy group having 1 to 7 carbon atoms.)

  The content of the compound represented by the general formula (XIV-1) is preferably 2% by mass or more and more preferably 3% by mass or more with respect to the total mass of the liquid crystal composition of the present invention. In consideration of solubility at low temperatures, transition temperature, electrical reliability, etc., the maximum ratio is preferably limited to 30% by mass or less, more preferably 27% by mass or less, and more preferably 24% by mass or less. , Less than 21% by mass is particularly preferable.

  Further, the compound represented by the general formula (XIV-1-1) is specifically preferably a compound represented by the formula (51.1) to the formula (51.4). It is more preferable to contain the compound represented by this.

  Moreover, it is preferable that the compound represented by general formula (XIV) is a compound represented by general formula (XIV-1-2).

(In the formula, R ¹⁴ represents an alkyl group having 1 to 7 carbon atoms, an alkenyl group having 2 to 7 carbon atoms, or an alkoxy group having 1 to 7 carbon atoms.)

  The content of the compound represented by the general formula (XIV-1-2) is based on the total mass of the liquid crystal composition of the present invention in consideration of solubility at a low temperature, transition temperature, electrical reliability, and the like. It is preferably 1% by mass to 15% by mass, more preferably 3% by mass to 13% by mass, further preferably 5% by mass to 11% by mass, and particularly preferably 7% by mass to 9% by mass. .

  Further, the compound represented by the general formula (XIV-1-2) is specifically preferably a compound represented by the formula (52.1) to the formula (52.4), among which the formula (52. It is preferable to contain the compound represented by 4).

  Furthermore, the compound represented by General Formula (XIV) is preferably a compound represented by General Formula (XIV-2).

(Wherein R ¹⁴ represents an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms, and X ¹⁴¹ to X ¹⁴⁴ are each independently fluorine. Represents an atom or a hydrogen atom, and Y ¹⁴ represents a fluorine atom, a chlorine atom or —OCF ₃ , except for the compound represented by formula (i).

  Although there is no restriction | limiting in the kind of compound which can be combined, It combines suitably for every embodiment in consideration of solubility at low temperature, transition temperature, electrical reliability, birefringence, etc. For example, in one embodiment of the present invention, there is one. Furthermore, in another embodiment of this invention, they are two types. Or in another embodiment of this invention, they are three types. In still another embodiment of the present invention, there are four types. Or in another embodiment of this invention, they are five or more types.

  The content of the compound represented by the general formula (XIV-2) is an upper limit and a lower limit for each embodiment in consideration of properties such as solubility at low temperatures, transition temperature, electrical reliability, and birefringence. There is a value.

For example, in one embodiment of the present invention, the content of the compound is 3 to 40% by mass relative to the total mass of the liquid crystal composition of the present invention, and in another embodiment, the content of the compound is 7 to 40%. In still another embodiment, the content of the compound is 8 to 40% by mass. In still another embodiment, the content of the compound is 10 to 40% by mass. In still another embodiment, the content of the compound is 10% by mass. The content is 11 to 40% by mass, and in still another embodiment, the content of the compound is 12 to 40% by mass, and in still another embodiment, the content of the compound is 18 to 40% by mass. In still another embodiment, the content of the compound is 19% to 40% by mass. In still another embodiment, the content of the compound is 21% to 40% by mass. In still another embodiment, the content of the compound is 22% to 40% by mass.

  In addition, for example, in one embodiment of the present invention, the content of the compound is 3 to 40% by mass in another embodiment of the present invention, and in another embodiment, the content of the compound is 3 to 35% by mass. In an embodiment of the present invention, the content of the compound is 3 to 25% by mass. In still another embodiment, the content of the compound is 3 to 20% by mass. In still another embodiment, the content of the compound is 3 to 3% by mass. In still another embodiment, the content of the compound is 3 to 10% by mass.

  When the liquid crystal composition of the present invention is used for a liquid crystal display device having a low driving voltage, it is suitable to increase the content of the compound represented by the general formula (XIV-2). In the case of a liquid crystal composition used for a liquid crystal display element having a high response speed, it is suitable to reduce the content of the compound represented by the general formula (XIV-2).

  Furthermore, it is preferable that the compound represented by general formula (XIV-2) is a compound represented by general formula (XIV-2-1).

(In the formula, R ¹⁴ represents an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms.)

  The content of the compound represented by the general formula (XIV-2-1) is based on the total mass of the liquid crystal composition of the present invention in consideration of solubility at a low temperature, transition temperature, electrical reliability, and the like. It is preferably 1% by mass to 15% by mass, more preferably 3% by mass to 13% by mass, further preferably 5% by mass to 11% by mass, and particularly preferably 7% by mass to 9% by mass. .

  Furthermore, the compound represented by the general formula (XIV-2-1) is specifically preferably a compound represented by the formula (53.1) to the formula (53.4), among which the formula (53. It is preferable to contain the compound represented by 4).

  Furthermore, the compound represented by General Formula (XIV-2) is preferably a compound represented by General Formula (XIV-2-2).

(In the formula, R ¹⁴ represents an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms.)

  The content of the compound represented by the general formula (XIV-2-2) is based on the total mass of the liquid crystal composition of the present invention in consideration of solubility at a low temperature, transition temperature, electrical reliability, and the like. 3 mass% or more and 20 mass% or less is preferable, 6 mass% or more and 17 mass% or less is more preferable, 9 mass% or more and 15 mass% or less is more preferable, and 12 mass% or more and 14 mass% or less is especially preferable. .

  Further, the compound represented by the general formula (XIV-2-2) is specifically preferably a compound represented by the formula (54.1) to the formula (54.4), among which the formula (54. It is preferable to contain the compound represented by 2) and / or Formula (54.4).

  In the liquid crystal composition of the present invention, the content of the compound represented by the formula (54.2) is preferably 5% by mass or more and 35% by mass or less based on the total mass of the liquid crystal composition of the present invention. More preferably, it is 5 mass% or less and 25 mass% or less, More preferably, it is 5 mass% or more and 22 mass% or less, More preferably, it is 8 mass% or more and 20 mass% or less.

  Furthermore, it is preferable that the compound represented by general formula (XIV-2) is a compound represented by general formula (XIV-2-3).

(In the formula, R ¹⁴ represents an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms.)

  The content of the compound represented by the general formula (XIV-2-3) is based on the total mass of the liquid crystal composition of the present invention in consideration of solubility at a low temperature, transition temperature, electrical reliability, and the like. It is preferably 5% by mass or more and 30% by mass or less, more preferably 9% by mass or more and 27% by mass or less, further preferably 12% by mass or more and 24% by mass or less, and particularly preferably 12% by mass or more and 20% by mass or less. .

  Further, the compound represented by the general formula (XIV-2-3) is specifically preferably a compound represented by the formula (55.1) to the formula (55.4), among which the formula (55. It is preferable to contain the compound represented by 2) and / or Formula (55.4).

  Furthermore, the compound represented by General Formula (XIV-2) is preferably a compound represented by General Formula (XIV-2-4).

(In the formula, R ¹⁴ represents an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms.)

  Although there is no restriction | limiting in the kind of compound which can be combined, It combines suitably for every embodiment in consideration of solubility at low temperature, transition temperature, electrical reliability, birefringence, etc. For example, in one embodiment of the present invention, there is one. Furthermore, in another embodiment of this invention, they are two types. Or in another embodiment of this invention, they are three or more types.

  The content of the compound represented by the general formula (XIV-2-4) is an upper limit for each embodiment in consideration of properties such as solubility at low temperatures, transition temperature, electrical reliability, and birefringence. There is a lower limit.

For example, in one embodiment of the present invention, the content of the compound is 2 to 35% by mass with respect to the total mass of the liquid crystal composition of the present invention, and in another embodiment, the content of the compound is 5 to 35%. In still another embodiment, the content of the compound is 7% to 35% by mass.

  Further, for example, in one embodiment of the present invention, the content of the compound is 2 to 35% by mass, and in another embodiment, the content of the compound is 2 to 30% by mass, and further to the total mass. In an embodiment of the present invention, the content of the compound is 2 to 25% by mass. In still another embodiment, the content of the compound is 2 to 20% by mass. In still another embodiment, the content of the compound is 2 to 2% by mass. In still another embodiment, the content of the compound is 2 to 10% by mass.

  When the liquid crystal composition of the present invention is used for a liquid crystal display element having a low driving voltage, it is suitable to increase the content of the compound represented by the general formula (XIV-2-4). In the case of a liquid crystal composition used for a liquid crystal display device having a high response speed, it is suitable to reduce the content of the compound represented by the general formula (XIV-2-4).

  Furthermore, the compound represented by the general formula (XIV-2-4) is specifically preferably a compound represented by the formula (56.1) to the formula (56.4), among which the formula (56. It is preferable to contain the compound represented by 1), Formula (56.2) or Formula (56.4).

  Furthermore, it is preferable that the compound represented by general formula (XIV-2) is a compound represented by general formula (XIV-2-5).

(In the formula, R ¹⁴⁰ represents an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms.)

The content of the compound represented by the general formula (XIV-2-5) is based on the total mass of the liquid crystal composition of the present invention in consideration of solubility at a low temperature, transition temperature, electrical reliability, and the like. 5 mass% or more and 25 mass% or less is preferable, 10 mass% or more and 22 mass% or less is more preferable, 13 mass% or more and 18 mass% or less are more preferable, and 13 mass% or more and 15 mass% or less are especially preferable. .

Furthermore, the compound represented by the general formula (XIV-2-5) is specifically a compound represented by the formula (57.1) to the formula (57.4). Among these, it is preferable to contain a compound represented by the formula (57.1).

  Furthermore, the compound represented by General Formula (XIV-2) is preferably a compound represented by General Formula (XIV-2-6).

(In the formula, R ¹⁴⁰ represents an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms.)

The content of the compound represented by the general formula (XIV-2-6) is based on the total mass of the liquid crystal composition of the present invention in consideration of solubility at a low temperature, transition temperature, electrical reliability, and the like. It is preferably 5% by mass or more and 25% by mass or less, more preferably 10% by mass or more and 22% by mass or less, further preferably 15% by mass or more and 20% by mass or less, and particularly preferably 15% by mass or more and 17% by mass or less. .

Furthermore, the compound represented by the general formula (XIV-2-6) is specifically preferably a compound represented by the formula (58.1) to the formula (58.4), among which the formula (58. It is preferable to contain the compound represented by 2).

The liquid crystal composition of the present invention preferably does not contain a compound having a structure in which oxygen atoms such as a peracid (—CO—OO—) structure are bonded in the molecule.
When importance is attached to the reliability and long-term stability of the liquid crystal composition, the content of the compound having a carbonyl group is preferably 5% by mass or less, preferably 3% by mass or less, and 1% by mass or less. Preferably, it is preferable not to contain substantially.
When importance is attached to stability by UV irradiation, the content of the compound substituted with chlorine atoms is preferably 15% by mass or less, preferably 10% by mass or less, and preferably 5% by mass or less. Preferably, it does not contain substantially.
It is preferable to increase the content of a compound whose ring structure in the molecule is a 6-membered ring, and the content of the compound whose ring structure in the molecule is a 6-membered ring is preferably 80% by mass or more, It is preferably 90% by mass or more, more preferably 95% by mass or more, and it is preferable that the liquid crystal composition is composed only of a compound having substantially all 6-membered ring structures in the molecule.
In order to suppress deterioration due to oxidation of the liquid crystal composition, 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 10% by mass or less. The content is preferably 5% by mass or less, and is preferably substantially not contained.
When importance is attached to the improvement of viscosity and the improvement of Tni, it is preferable to reduce the content of the compound having a 2-methylbenzene-1,4-diyl group in which hydrogen atoms may be substituted with halogens in the molecule. In addition, the content of the compound having a 2-methylbenzene-1,4-diyl group in which hydrogen atoms may be substituted with halogen in the molecule is preferably 10% by mass or less, and 5% by mass or less. Is preferable, and it is preferable not to contain substantially.
In the compounds described in the present application, when an alkenyl group is substituted as a side chain, when the alkenyl group is bonded to cyclohexane, the alkenyl group preferably has 2 to 5 carbon atoms, and the alkenyl group is bonded to benzene. In this case, the alkenyl group preferably has 4 to 5 carbon atoms, and the unsaturated bond of the alkenyl group and benzene are preferably not directly bonded.

  The liquid crystal composition of the present invention may contain a polymerizable compound in order to produce a liquid crystal display element such as a PS mode, a lateral electric field type PSA mode, or a lateral electric field type PSVA mode. Examples of the polymerizable compound that can be used include a photopolymerizable monomer that undergoes polymerization by energy rays such as light. The structure has a liquid crystal skeleton in which a plurality of six-membered rings such as biphenyl derivatives and terphenyl derivatives are connected. Examples thereof include a polymerizable compound. More specifically, the general formula (XX)

(Wherein, X ²⁰¹ and X ²⁰² each independently represent a hydrogen atom or a methyl group,
Sp ²⁰¹ and Sp ²⁰² are each independently a single bond, an alkylene group having 1 to 8 carbon atoms, or —O— (CH ₂ ) _s — (wherein _s represents an integer of 2 to 7, Represents an aromatic ring).
Z ²⁰¹ represents —OCH ₂ —, —CH ₂ O—, —COO—, —OCO—, —CF ₂ O—, —OCF ₂ —, —CH ₂ CH ₂ —, —CF ₂ CF ₂ —, —CH═. CH—COO—, —CH═CH—OCO—, —COO—CH═CH—, —OCO—CH═CH—, —COO—CH ₂ CH ₂ —, —OCO—CH ₂ CH ₂ —, —CH ₂ CH ₂ —COO—, —CH ₂ CH ₂ —OCO—, —COO—CH ₂ —, —OCO—CH ₂ —, —CH ₂ —COO—, —CH ₂ —OCO—, —CY ¹ ═CY ² — (Wherein Y ¹ and Y ² each independently represents a fluorine atom or a hydrogen atom), —C≡C— or a single bond;
M ²⁰¹ represents a 1,4-phenylene group, a trans-1,4-cyclohexylene group or a single bond, and all 1,4-phenylene groups in the formula have an arbitrary hydrogen atom substituted by a fluorine atom. Also good. ) Is preferred.

X ²⁰¹ and X ²⁰² are each preferably a diacrylate derivative that represents a hydrogen atom, or a dimethacrylate derivative that has a methyl group, and a compound in which one represents a hydrogen atom and the other represents a methyl group. As for the polymerization rate of these compounds, diacrylate derivatives are the fastest, dimethacrylate derivatives are slow, asymmetric compounds are in the middle, and a preferred embodiment can be used depending on the application. In the PSA display element, a dimethacrylate derivative is particularly preferable.

Sp ²⁰¹ and Sp ²⁰² each independently represent a single bond, an alkylene group having 1 to 8 carbon atoms, or —O— (CH ₂ ) _s —, but in the PSA display element, at least one is a single bond. A compound in which both represent a single bond or one represents a single bond and the other represents an alkylene group having 1 to 8 carbon atoms or —O— (CH ₂ ) _s — is preferable. In this case, the alkyl group of 1-4 is preferable, and 1-4 is preferable for s.

Z ²⁰¹ represents —OCH ₂ —, —CH ₂ O—, —COO—, —OCO—, —CF ₂ O—, —OCF ₂ —, —CH ₂ CH ₂ —, —CF ₂ CF ₂ — or a single bond. Are preferred, —COO—, —OCO— or a single bond is more preferred, and a single bond is particularly preferred.

M ²⁰¹ represents a 1,4-phenylene group, a trans-1,4-cyclohexylene group or a single bond in which any hydrogen atom may be substituted by a fluorine atom, but the 1,4-phenylene group or the single bond is preferable. When C represents a ring structure other than a single bond, Z ²⁰¹ is preferably a linking group other than a single bond. When M ²⁰¹ is a single bond, Z ²⁰¹ is preferably a single bond.

From these points, in general formula (XX), the ring structure between Sp ²⁰¹ and Sp ²⁰² is specifically preferably the structure described below.

In the general formula (XX), when M ²⁰¹ represents a single bond and the ring structure is formed of two rings, it is preferable to represent the following formulas (XXa-1) to (XXa-5), It is more preferable to represent the formula (XXa-3) from (XXa-1), and it is particularly preferable to represent the formula (XXa-1).

(In the formula, both ends shall be bonded to Sp ²⁰¹ or Sp ^202. )

  The polymerizable compounds containing these skeletons are optimal for PSA-type liquid crystal display elements because of the alignment regulating power after polymerization, and a good alignment state can be obtained, so that display unevenness is suppressed or does not occur at all.

  From the above, as the polymerizable monomer, general formula (XX-1) to general formula (XX-4) are particularly preferable, and among them, general formula (XX-2) is most preferable.

(In the formula, Sp ²⁰ represents an alkylene group having 2 to 5 carbon atoms.)

  In the case of adding a monomer to the liquid crystal composition of the present invention, the polymerization proceeds even when no polymerization initiator is present, but may contain a polymerization initiator in order to accelerate the polymerization. Examples of the polymerization initiator include benzoin ethers, benzophenones, acetophenones, benzyl ketals, acylphosphine oxides, and the like.

  The liquid crystal composition in the 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 replaced by, ^{M Q} is trans -1,4-cyclohexylene group, 1,4-phenylene group or a single bond is represented.)

R ^Q represents a linear alkyl group having 1 to 22 carbon atoms or a branched alkyl group, and one or two or more CH ₂ groups in the alkyl group are —O—so that the oxygen atom is not directly adjacent to each other. -, - CH = CH -, - CO -, - OCO -, - COO -, - C≡C -, - CF 2 O -, - OCF 2 - may be substituted with, but 1 to 10 carbon atoms Linear alkyl group, linear alkoxy group, linear alkyl group in which one CH ₂ group is substituted by —OCO— or —COO—, branched alkyl group, branched alkoxy group, one CH ₂ group is —OCO— Or a branched alkyl group substituted with —COO—, a linear alkyl group having 1 to 20 carbon atoms, a 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 more preferably a branched alkyl group substituted with —OCO— or —COO—. ^MQ represents a trans-1,4-cyclohexylene group, a 1,4-phenylene group or a single bond, and a trans-1,4-cyclohexylene group or a 1,4-phenylene group is preferable.

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

In the formula, R ^Q1 is preferably a linear or branched alkyl group having 1 to 10 carbon atoms, R ^Q2 is preferably a linear or branched alkyl group having 1 to 20 carbon atoms, and R ^Q3 is A straight-chain alkyl group having 1 to 8 carbon atoms, a branched-chain alkyl group, a straight-chain alkoxy group or a branched-chain alkoxy group is preferred, and L ^Q is preferably a straight-chain alkylene group or branched-chain alkylene group having 1 to 8 carbon atoms. . Of the compounds represented by general formula (Qa) to general formula (Qd), compounds represented by general formula (Qc) and general formula (Qd) are more preferable.

  In the liquid crystal composition of the present invention, the compound represented by formula (Q) preferably contains one or two compounds, more preferably contains 1 to 5 compounds, and the content is 0.001. Is preferably 1 to 1% by mass, more preferably 0.001 to 0.1% by mass, and particularly preferably 0.001 to 0.05% by mass.

<Liquid crystal display element>
The liquid crystal composition containing the polymerizable compound of the present invention is provided with liquid crystal alignment ability by polymerizing the polymerizable compound contained therein by ultraviolet irradiation, and transmits light through the birefringence of the liquid crystal composition. It is used in a liquid crystal display element that controls As liquid crystal display elements, AM-LCD (active matrix liquid crystal display element), TN (nematic liquid crystal display element), STN-LCD (super twisted nematic liquid crystal display element), OCB-LCD and IPS-LCD (in-plane switching liquid crystal display element) However, it is particularly useful for AM-LCDs, and can be used for transmissive or reflective liquid crystal display elements.

  The two substrates of the liquid crystal cell used in the liquid crystal display element can be made of a transparent material having flexibility such as glass or plastic, and one of them can be an opaque material such as silicon. A transparent substrate having a transparent electrode layer can be obtained, for example, by sputtering indium tin oxide (ITO) on a transparent substrate such as a glass plate.

  The color filter can be prepared by, for example, a pigment dispersion method, a printing method, an electrodeposition method, or a dyeing method. A method for producing a color filter by a pigment dispersion method will be described as an example. A curable coloring composition for a color filter is applied on the transparent substrate, subjected to patterning treatment, and cured by heating or light irradiation. By performing this process for each of the three colors red, green, and blue, a pixel portion for a color filter can be created. In addition, a pixel electrode provided with an active element such as a TFT, a thin film diode, or a metal insulator metal specific resistance element may be provided on the substrate.

  The said board | substrate is made to oppose so that a transparent electrode layer may become an inner side. In that case, you may adjust the space | interval of a board | substrate through a spacer. At this time, it is preferable to adjust so that the thickness of the light control layer obtained may be set to 1-100 micrometers. More preferably, the thickness is 1.5 to 10 μm. When a polarizing plate is used, it is preferable to adjust the product of the refractive index anisotropy Δn of the liquid crystal and the cell thickness d so that the contrast is maximized. In addition, when there are two polarizing plates, the polarizing axis of each polarizing plate can be adjusted so that the viewing angle and contrast are good. Furthermore, a retardation film for widening the viewing angle can also be used. Examples of the spacer include columnar spacers made of glass particles, plastic particles, alumina particles, a photoresist material, and the like. Thereafter, a sealant such as an epoxy thermosetting composition is screen-printed on the substrates with a liquid crystal inlet provided, the substrates are bonded together, and heated to thermally cure the sealant.

  As a method of sandwiching the polymerizable compound-containing liquid crystal composition between the two substrates, a normal vacuum injection method or an ODF method can be used. However, in the vacuum injection method, there is a problem that an injection mark remains instead of a drop mark. In this invention, it can use more suitably for the display element manufactured using ODF method. In the ODF liquid crystal display device manufacturing process, a sealant such as epoxy photothermal curing is drawn on a backplane or frontplane substrate using a dispenser in a closed-loop bank shape, and then removed. A liquid crystal display element can be manufactured by bonding a front plane and a back plane after dropping a predetermined amount of the liquid crystal composition in the air. The liquid crystal composition of the present invention can be preferably used because the liquid crystal composition can be stably dropped in the ODF process.

  As a method for polymerizing a polymerizable compound, an appropriate polymerization rate is desirable in order to obtain good alignment performance of liquid crystals. Therefore, active energy rays such as ultraviolet rays or electron beams are irradiated singly or in combination or sequentially. The method of polymerizing by is preferred. When ultraviolet rays are used, a polarized light source or a non-polarized light source may be used. In addition, when the polymerization is performed in a state where the polymerizable compound-containing liquid crystal composition is sandwiched between two substrates, at least the substrate on the irradiation surface side must be given appropriate transparency to the active energy rays. I must. Moreover, after polymerizing only a specific part using a mask during light irradiation, the orientation state of the unpolymerized part is changed by changing conditions such as an electric field, a magnetic field, or temperature, and further irradiation with active energy rays is performed. Then, it is possible to use a means for polymerization. In particular, when ultraviolet exposure is performed, it is preferable to perform ultraviolet exposure while applying an alternating electric field to the polymerizable compound-containing liquid crystal composition. The alternating electric field to be applied is preferably an alternating current having a frequency of 10 Hz to 10 kHz, more preferably a frequency of 60 Hz to 10 kHz, and the voltage is selected depending on a desired pretilt angle of the liquid crystal display element. That is, the pretilt angle of the liquid crystal display element can be controlled by the applied voltage. In a horizontal electric field type MVA mode liquid crystal display element, the pretilt angle is preferably controlled from 80 degrees to 89.9 degrees from the viewpoint of alignment stability and contrast.

The temperature during irradiation is preferably within a temperature range in which the liquid crystal state of the liquid crystal composition of the present invention is maintained. Polymerization is preferably performed at a temperature close to room temperature, that is, typically at a temperature of 15 to 35 ° C. As a lamp for generating ultraviolet rays, a metal halide lamp, a high-pressure mercury lamp, an ultra-high pressure mercury lamp, or the like can be used. Moreover, as a wavelength of the ultraviolet-rays to irradiate, it is preferable to irradiate the ultraviolet-ray of the wavelength range which is not the absorption wavelength range of a liquid crystal composition, and it is preferable to cut and use an ultraviolet-ray as needed. Intensity of ultraviolet irradiation is ^preferably from ^{0.1mW / cm 2 ~100W / cm 2} , 2mW / cm 2 ~50W / cm 2 is more preferable. The amount of energy of ultraviolet rays to be irradiated can be adjusted as appropriate, but is preferably 10 mJ / cm ² to 500 J / cm ^{2, and} more preferably 100 mJ / cm ² to 200 J / cm ² . When irradiating with ultraviolet rays, the intensity may be changed. The time for irradiating with ultraviolet rays is appropriately selected depending on the intensity of the irradiated ultraviolet rays, but is preferably from 10 seconds to 3600 seconds, and more preferably from 10 seconds to 600 seconds.

  The liquid crystal display device using the liquid crystal composition of the present invention is useful for achieving both high-speed response and suppression of display failure, and is particularly useful for a liquid crystal display device for active matrix driving, including VA mode, PSVA mode, It can be applied to a liquid crystal display element for PSA mode, IPS (in-plane switching) mode, FFS (fringe field switching) mode or ECB mode.

Hereinafter, preferred embodiments of a liquid crystal display device according to the present invention will be described in detail with reference to the drawings.
FIG. 1 is a cross-sectional view showing a liquid crystal display element including two substrates facing each other, a sealing material provided between the substrates, and liquid crystal sealed in a sealing region surrounded by the sealing material. It is.
Specifically, the TFT layer 102 and the pixel electrode 103 are provided on the first substrate 100, the backplane on which the passivation film 104 and the first alignment film 105 are provided, and the black matrix on the second substrate 200. 202, a color filter 203, a planarization film (overcoat layer) 201, and a transparent electrode 204 are provided, and a second alignment film 205 is provided thereon, provided between the front plane facing the back plane and the substrate. A sealing material 301 and a liquid crystal layer 303 sealed in a sealing region surrounded by the sealing material, and protrusions (columnar spacers) 302 and 304 are provided on a substrate surface in contact with the sealing material 301. The specific aspect of a liquid crystal display element is shown.

  The first substrate or the second substrate is not particularly limited as long as it is substantially transparent, and glass, ceramics, plastics, or the like can be used. Examples of plastic substrates include cellulose derivatives such as cellulose, triacetyl cellulose, diacetyl cellulose, polycycloolefin derivatives, polyesters such as polyethylene terephthalate and polyethylene naphthalate, polypropylene, and polyethylene. Polyolefin, polycarbonate, polyvinyl alcohol, polyvinyl chloride, polyvinylidene chloride, polyamide, polyimide, polyimide amide, polystyrene, polyacrylate, polymethyl methacrylate, polyethersulfone, polyarylate, and glass fiber-epoxy resin Inorganic-organic composite materials such as glass fiber and acrylic resin can be used.

  When a plastic substrate is used, it is preferable to provide a barrier film. The function of the barrier film is to reduce the moisture permeability of the plastic substrate and to improve the reliability of the electrical characteristics of the liquid crystal display element. The barrier film is not particularly limited as long as it has high transparency and low water vapor permeability. Generally, vapor deposition, sputtering, chemical vapor deposition method (CVD method) using an inorganic material such as silicon oxide is used. ) Is used.

In the present invention, the same material or different materials may be used as the first substrate or the second substrate, and there is no particular limitation. Use of a glass substrate is preferable because a liquid crystal display element having excellent heat resistance and dimensional stability can be produced. In addition, a plastic substrate is preferable because it is suitable for a manufacturing method using a roll-to-roll method and is suitable for weight reduction or flexibility. For the purpose of imparting flatness and heat resistance, good results can be obtained by combining a plastic substrate and a glass substrate.
In the embodiments described later, a substrate is used as the material of the first substrate 100 or the second substrate 200.

  In the backplane, the TFT layer 102 and the pixel electrode 103 are provided on the first substrate 100. These are manufactured by a normal array process. A backplane is obtained by providing a passivation film 104 and a first alignment film 105 thereon.

  A passivation film 104 (also referred to as an inorganic protective film) is a film for protecting the TFT layer. Usually, a nitride film (SiNx), an oxide film (SiOx), or the like is formed by a chemical vapor deposition (CVD) technique or the like.

  The first alignment film 105 is a film having a function of aligning liquid crystals, and a polymer material such as polyimide is usually used in many cases. As the coating solution, an alignment agent solution composed of a polymer material and a solvent is used. Since the alignment film may hinder the adhesive force with the sealing material, a pattern is applied in the sealing region. For the application, a printing method such as a flexographic printing method or a droplet discharge method such as an ink jet is used. The applied alignment agent solution is crosslinked and cured by baking after the solvent is evaporated by temporary drying. Thereafter, an alignment process is performed to provide an alignment function.

  The alignment treatment is usually performed by a rubbing method. The polymer film formed as described above is rubbed in one direction using a rubbing cloth made of fibers such as rayon, thereby producing liquid crystal alignment ability.

  Moreover, the photo-alignment method may be used. The photo-alignment method is a method of generating alignment ability by irradiating polarized light on an alignment film containing an organic material having photosensitivity, and does not cause the generation of scratches or dust on the substrate due to the rubbing method. Examples of the organic material in the photo-alignment method include a material containing a dichroic dye. Dichroic dyes include molecular orientation induction or isomerization reaction (eg, azobenzene group), dimerization reaction (eg, cinnamoyl group), photocrosslinking reaction (eg, benzophenone group) due to Weigert effect resulting from photodichroism. Alternatively, those having a group (hereinafter abbreviated as a photo-alignment group) that causes a photoreaction that causes liquid crystal alignment ability, such as a photolysis reaction (eg, polyimide group), can be used. After the solvent is evaporated by temporary drying, the applied alignment agent solution is irradiated with light having an arbitrary deflection (polarized light), whereby an alignment film having alignment ability in an arbitrary direction can be obtained.

  One front plane is provided with a black matrix 202, a color filter 203, a planarization film 201, a transparent electrode 204, and a second alignment film 205 on a second substrate 200.

  The black matrix 202 is produced by, for example, a pigment dispersion method. Specifically, a color resin solution in which a black colorant is uniformly dispersed for forming a black matrix is applied on the second substrate 200 provided with the barrier film 201 to form a colored layer. Subsequently, the colored layer is baked and cured. A photoresist is applied on this and prebaked. After exposing the photoresist through a mask pattern, development is performed to pattern the colored layer. Thereafter, the photoresist layer is peeled off and the colored layer is baked to complete the black matrix 202.

  Alternatively, a photoresist type pigment dispersion may be used. In this case, a photoresist-type pigment dispersion is applied, pre-baked, exposed through a mask pattern, and then developed to pattern the colored layer. Thereafter, the photoresist layer is peeled off and the colored layer is baked to complete the black matrix 202.

  The color filter 203 is formed by a pigment dispersion method, an electrodeposition method, a printing method, a staining method, or the like. Taking the pigment dispersion method as an example, a color resin liquid in which a pigment (for example, red) is uniformly dispersed is applied onto the second substrate 200, and after baking and curing, a photoresist is applied thereon and prebaked. After the photoresist is exposed through a mask pattern, development is performed and patterning is performed. Thereafter, the photoresist layer is peeled off and baked again to complete the (red) color filter 203 (203a). There is no particular limitation on the color order to be created. Similarly, the green color filter 203 (203b) and the blue color filter 203 (203c) are formed.

  The transparent electrode 204 is provided on the color filter 203 (if necessary, an overcoat layer (201) is provided on the color filter 203 for surface flattening). The transparent electrode 204 preferably has a high transmittance, and preferably has a low electrical resistance. The transparent electrode 204 is formed by sputtering an oxide film such as ITO.

  In addition, a passivation film may be provided on the transparent electrode 204 for the purpose of protecting the transparent electrode 204.

  The second alignment film 205 is the same as the first alignment film 105 described above.

  Although specific embodiments of the backplane and the front plane used in the present invention have been described above, the present invention is not limited to the specific embodiments, and changes in the embodiments according to the desired liquid crystal display element are possible. Is free.

  The shape of the columnar spacer is not particularly limited, and the horizontal cross section can be various shapes such as a circle, a polygon such as a quadrangle, etc. A polygonal shape is particularly preferable. The protrusion shape is preferably a truncated cone or a truncated pyramid.

  The material of the columnar spacer is not particularly limited as long as it is a sealing material, an organic solvent used for the sealing material, or a material that does not dissolve in liquid crystal. preferable. On the other hand, the protrusion can be provided on the surface of the first substrate in contact with the sealing material by a photolithography method or a droplet discharge method. For these reasons, it is preferable to use a photocurable resin suitable for a photolithography method or a droplet discharge method.

  As an example, a case where the columnar spacer is obtained by a photolithography method will be described. FIG. 2 is a diagram of an exposure process using a columnar spacer forming pattern formed on a black matrix as a photomask pattern.

  On the transparent electrode 204 of the front plane, a resin solution for forming columnar spacers (not containing a colorant) is applied. Subsequently, the resin layer 402 is baked and cured. A photoresist is applied on this and prebaked. After exposing the photoresist through the mask pattern 401, development is performed to pattern the resin layer. Thereafter, the photoresist layer is peeled off, and the resin layer is baked to complete columnar spacers (302, 0304 in FIG. 1).

  The formation position of the columnar spacer can be determined at a desired position by a mask pattern. Therefore, both the inside of the sealing region of the liquid crystal display element and the outside of the sealing region (sealing material application portion) can be created at the same time. The columnar spacer is preferably formed so as to be positioned on the black matrix so that the quality of the sealing region does not deteriorate. Such columnar spacers produced by photolithography are sometimes referred to as column spacers or photospacers.

  As the material of the spacer, a negative water-soluble resin such as PVA-stilbazo photosensitive resin, a mixture of a polyfunctional acrylic monomer, an acrylic acid copolymer, a triazole initiator, or the like is used. Alternatively, there is a method using a color resin in which a colorant is dispersed in a polyimide resin. In the present invention, there is no particular limitation, and a spacer can be obtained from a known material in accordance with the compatibility with the liquid crystal or the sealing material to be used.

  Thus, after providing a columnar spacer on the surface to be a sealing region on the front plane, a seal material (301 in FIG. 1) is applied to the surface of the back plane that contacts the seal material.

  The material of the sealing material is not particularly limited, and a curable resin composition obtained by adding a polymerization initiator to an epoxy or acrylic photocurable, thermosetting, or photothermal combination curable resin is used. In order to control moisture permeability, elastic modulus, viscosity, etc., fillers made of inorganic or organic substances may be added. The shape of these fillers is not particularly limited, and includes a spherical shape, a fiber shape, and an amorphous shape. Furthermore, in order to control the cell gap satisfactorily, a spherical or fibrous gap material having a monodisperse diameter is mixed, or in order to further strengthen the adhesive force with the substrate, a fibrous substance that is easily entangled with the protrusions on the substrate is used. You may mix. The diameter of the fibrous material used at this time is desirably about 1/5 to 1/10 or less of the cell gap, and the length of the fibrous material is desirably shorter than the seal coating width.

  The material of the fibrous substance is not particularly limited as long as a predetermined shape can be obtained, and synthetic fibers such as cellulose, polyamide and polyester, and inorganic materials such as glass and carbon can be appropriately selected.

  As a method for applying the sealing material, there are a printing method and a dispensing method, but a dispensing method with a small amount of the sealing material used is desirable. The application position of the sealing material is usually on the black matrix so as not to adversely affect the sealing area. In order to form a liquid crystal dropping region in the next step (so that the liquid crystal does not leak), the sealing material application shape is a closed loop shape.

  Liquid crystal is dropped onto the closed loop shape (sealing region) of the front plane to which the sealing material is applied. Usually a dispenser is used. Since the amount of liquid crystal to be dropped coincides with the volume of the liquid crystal cell, the amount is basically the same as the volume obtained by multiplying the height of the column spacer and the seal application area. However, in order to optimize liquid crystal leakage and display characteristics in the cell bonding process, the amount of liquid crystal to be dropped may be adjusted as appropriate, or the liquid crystal dropping position may be dispersed.

  Next, a back plane is bonded to the front plane on which the sealing material is applied and liquid crystal is dropped. Specifically, the front plane and the back plane are adsorbed on a stage having a mechanism for adsorbing a substrate such as an electrostatic chuck, and the second alignment film on the front plane and the first alignment film on the back plane face each other. In the meantime, it is arranged at a position (distance) where the sealing material does not contact the other substrate. In this state, the system is depressurized. After decompression is completed, the positions of both substrates are adjusted while confirming the bonding position between the front plane and the back plane (alignment operation). When the adjustment of the bonding position is completed, the substrate is brought close to a position where the sealing material on the front plane and the back plane are in contact with each other. In this state, the system is filled with an inert gas, and the pressure is gradually returned to normal pressure while releasing the reduced pressure. At this time, the front plane and the back plane are bonded together by atmospheric pressure, and a cell gap is formed at the height of the columnar spacer. In this state, the sealing material is irradiated with ultraviolet rays to cure the sealing material, thereby forming a liquid crystal cell. Thereafter, a heating step is added in some cases to promote curing of the sealing material. A heating process is often added to enhance the adhesive strength of the sealing material and improve the reliability of electrical characteristics.

  EXAMPLES The present invention will be described in further detail with reference to examples below, but the present invention is not limited to these examples. Further, “%” in the compositions of the following Examples and Comparative Examples means “% by mass”.

In the examples, the measured characteristics are as follows.
Tni: Nematic phase-isotropic liquid phase transition temperature (° C.)
Δn: Refractive index anisotropy at 295K (also known as birefringence)
Δε: Dielectric anisotropy at 295K η: Viscosity at 295K (mPa · s)
γ1: rotational viscosity at 295 K (mPa · s)
VHR: Voltage holding ratio (%) at 313K under conditions of frequency 60Hz and applied voltage 5V

<Evaluation of burn-in>
The burn-in evaluation of the liquid crystal display element is based on the following four-step evaluation of the afterimage level of the fixed pattern when the predetermined fixed pattern is displayed in the display area for 1440 hours and then the entire screen is displayed uniformly. went.

◎ No afterimage ○ Very little afterimage but acceptable level △ With afterimage unacceptable level × Afterimage fairly bad

<Evaluation of volatility (manufacturing equipment contamination)>
Evaluation of the volatility of the liquid crystal material was performed by observing the operating state of the vacuum stirring and defoaming mixer with a stroboscope and visually observing foaming of the liquid crystal material. Specifically, put 0.8kg of the liquid crystal composition in a dedicated container vacuum agitation defoaming mixer having a volume 2.0L, under degassing of 4 kPa, the revolution speed ^{15S -1,} vacuum stirring at rotation speed 7.5S ^-1 The defoaming mixer was operated, and the following four-step evaluation was performed according to the time until foaming started.

A: It took 3 minutes or more to foam. The possibility of equipment contamination due to volatilization is low.
○: It was 1 minute or more and less than 3 minutes until foaming. There is concern about minor equipment contamination due to volatilization.
(Triangle | delta): It was 30 seconds or more and less than 1 minute until it foamed. Equipment contamination due to volatilization occurs.
X: Within 30 seconds until foaming. There is concern about serious equipment contamination due to volatilization.

<Evaluation of process suitability>
The process suitability is that the liquid crystal is dropped by 40 pL at a time using a constant volume metering pump 100000 times in the ODF process, and the following “0 to 200 times, 201 to 400 times, 401 to 600 times, ..., 99801 to 100,000 times ”, the change in the amount of liquid crystal dropped 200 times each was evaluated in the following four stages.

A: Change is extremely small (a liquid crystal display element can be manufactured stably)
○: Acceptable level even though there is a slight change △: Unacceptable level with change (Yield deteriorated due to the occurrence of spots)
×: There is a change and it is quite inferior (liquid crystal leakage and vacuum bubbles are generated)

<Evaluation of solubility at low temperature>
For the evaluation of solubility at low temperature, after preparing the liquid crystal composition, 0.5 g of the liquid crystal composition was weighed in a 1 mL sample bottle, and the following was performed in a temperature-controlled test tank for one cycle “−20 ° C. ( 1 hour hold) → temperature rise (0.2 ° C./min)→0° C. (1 hour hold) → temperature rise (0.2 ° C./min)→20° C. (1 hour hold) → temperature drop (−0. 2 ° C./min)→0° C. (1 hour hold) → Cooling temperature (−0.2 ° C./min)→−20° C. ”, and visually generate precipitates from the liquid crystal composition The following four-level evaluation was performed.

A: No precipitate was observed for 600 hours or more.
A: No precipitate was observed for 300 hours or more.
Δ: Precipitates were observed within 150 hours.
X: Precipitates were observed within 75 hours.

( Reference Example 1)
The following composition was prepared. Table 1 shows the physical property values of the composition of Reference Example 1.

(Comparative Example 1)
The composition shown below which does not contain the compound represented by the said general formula (i) was prepared. The physical property values of the composition of Comparative Example 1 are shown in Table 2.

Although the composition of Comparative Example 1 that does not contain the compound represented by the general formula (i) increases Tni as compared with the composition of Reference Example 1 that contains the compound represented by the general formula (i). , Δn and Δε decreased, and η increased.

(Comparative Example 2)
The composition shown below which does not contain the compound represented by the said general formula (ii) was prepared. Table 3 shows the physical property values of the composition of Comparative Example 2.

The composition of Comparative Example 2 that does not contain the compound represented by General Formula (ii) is substantially the same as that of Reference Example 1 that contains the compound represented by General Formula (ii). Although a value of about was shown and Tni increased, Δn and Δε decreased.

( Reference Example 2)
The following composition was prepared. Table 4 shows the physical property values of the composition of Reference Example 2.

( Reference Example 3)
The following composition was prepared. Table 5 shows the physical property values of the composition of Reference Example 3.

( Reference Example 4)
The following composition was prepared. Table 6 shows the physical property values of the composition of Reference Example 4.

(Example 1 )
The following composition was prepared. Table 7 shows the physical property values of the composition of Example 1 .

(Example 2 )
The following composition was prepared. The physical property values of the composition of Example 2 are shown in Table 8.

(Example 3 )
The following composition was prepared. Table 9 shows the physical property values of the composition of Example 3 .

(Example 4 )
The following composition was prepared. Table 10 shows the physical property values of the composition of Example 4 .

(Example 5 )
The following composition was prepared. Table 11 shows the physical property values of the composition of Example 5 .

(Example 6 )
The following composition was prepared. Table 12 shows the physical property values of the composition of Example 6 .

The configurations and combinations thereof in the embodiments described above are examples, and additions, omissions, substitutions, and other modifications can be made without departing from the spirit of the present invention. Further, the present invention is not limited by each embodiment, and is limited only by the scope of the claims.
Table 13 shows the initial VHR, VHR after heating (150 ° C., 1 hour), burn-in evaluation, evaluation of volatility, evaluation of process suitability, and evaluation of solubility at low temperatures of the liquid crystal compositions described in each Example. To do.

  It has a liquid crystal phase in a wide temperature range, low viscosity, good solubility at low temperatures, high specific resistance and voltage holding ratio, stable to heat and light, and displays such as burn-in and dripping marks It is possible to provide a liquid crystal composition having a positive Δε and capable of producing a liquid crystal display element that is less likely to be defective and excellent in display quality with a high yield, and a liquid crystal display element using the liquid crystal composition.

100 first substrate 102 TFT layer 103 pixel electrode 104 passivation film 105 first alignment film 200 second substrate 201 planarization film (overcoat layer)
202 Black matrix 203 Color filter 204 Transparent electrode 205 Second alignment film 301 Seal material 302 Projection (columnar spacer)
303 Liquid crystal layer 304 Protrusion (columnar spacer)
401 mask pattern 402 resin layer L light

Claims (9)

One or more compounds represented by the following general formula (i) are contained, two or more compounds represented by the following general formula (ii) are contained, and represented by the following general formula (ii) As the compound, at least one compound represented by the following general formula (ii-2) and a compound represented by the following general formula (ii), m ⁱⁱ¹ in the formula represents 1, and X ⁱⁱ¹ represents hydrogen. Containing at least one compound that represents an atom and X ⁱⁱ² represents a fluorine atom,
Furthermore, the compound represented by the following general formula (I-1-1),
A compound represented by the following general formula (I-1-2):
A compound represented by the following general formula (II-2) and one or more compounds selected from the group of compounds represented by the following general formula (III), and a compound represented by the following general formula (X-4), A liquid crystal composition containing a compound represented by the following general formula (XI-1) and one or more compounds selected from the compound group represented by the following general formula (VIII-1).
(In the formula, R ⁱ¹ , R ⁱ² and R ⁱⁱ¹ each independently represent an alkyl group having 1 to 8 carbon atoms, and one or two or more non-adjacent —CH 2 — in the alkyl group are each independent. May be substituted by —CH═CH—, —C≡C—, —O—, —CO—, —COO— or —OCO—, and m ⁱⁱ¹ represents 1 or 2, and X ^{i1 to} X ^{i3, X i5} and ^{X i6} represents a hydrogen atom ^{independently, X i4} represents a fluorine ^atom, each ^{X ii1} and ^{X ii2} independently represent a hydrogen atom, a fluorine atom or a chlorine atom.)
(In the formula, R ⁱⁱ¹ represents the same meaning as R ⁱⁱ¹ in the general formula (ii), and X ⁱⁱ¹ and X ⁱⁱ² represent a fluorine atom.)
(In the formula, each R ¹² independently represents an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms, or an alkoxy group having 1 to 5 carbon atoms.)
(R ²³ represents an alkenyl group having 2 to 5 carbon atoms, and R ²⁴ represents an alkyl group having 1 to 5 carbon atoms or an alkoxy group having 1 to 4 carbon atoms.)
(R ³¹ and R ³² each independently represent an alkenyl group having 2 to 5 carbon atoms, an alkyl group having 1 to 5 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms.)
(In the formula, X ¹⁰² represents a fluorine atom or a hydrogen atom, and R ¹⁰ represents an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms. )
(In the formula, R ¹¹ represents an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms.)
(In the formula, R ⁸ represents an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms.) 3 or more types of the compound represented by the general formula (ii) are contained, and in the compound represented by the general formula (ii), m ⁱⁱ¹ represents 1, X ⁱⁱ¹ represents a hydrogen atom, and X ⁱⁱ² The liquid crystal composition according to claim 1, which contains two or more compounds each of which represents a fluorine atom . The liquid crystal composition according to claim 1, comprising at least one compound in which R ⁱ¹ and R ⁱ² are different substituents as the compound represented by the general formula (i). The liquid crystal composition according to claim 1, comprising a compound in which R ⁱⁱ¹ in the general formula (ii) is an ethyl group and a compound that is a propyl group. The liquid crystal composition according to claim 1, comprising a compound represented by the following general formula (L).
(Wherein, R ^L1 and R ^L2 each independently represent an alkyl group having 1 to 8 carbon atoms, and one or two or more non-adjacent —CH ₂ — in the alkyl group are each independently May be substituted by —CH═CH—, —C≡C—, —O—, —CO—, —COO— or —OCO—,
OL represents 0, 1, 2 or 3;
B ^L1 , B ^L2 and B ^L3 are each independently (a) a 1,4-cyclohexylene group (one —CH ₂ — present in this group or two or more —CH ₂ — not adjacent to each other). May be replaced with -O-) and (b) a 1,4-phenylene group (one -CH = present in this group or two or more non-adjacent -CH = are -N May be replaced by =.)
Represents a group selected from the group consisting of: one or two or more hydrogen atoms in the above groups (a) and (b) are each independently substituted with a cyano group, a fluorine atom or a chlorine atom; L ^L1 and L ^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 = N-N = CH -, - CH = CH -, - represents CF = CF- or -C≡C-,
When OL is 2 or 3 and a plurality of L ^L2 are present, they may be the same or different, and when OL is 2 or 3 and a plurality of B ^L3 is present, they are the same Or different. However, the compound represented by general formula (i), the compound represented by general formula (I-1-1), the compound represented by general formula (I-1-2), and general formula (II-2) And the compound represented by the general formula (III) are excluded. ) The composition of Claim 1 containing the compound represented by the following general formula (M).
(Wherein R ^M1 represents an alkyl group having 1 to 8 carbon atoms, and one or two or more non-adjacent —CH ₂ — in the alkyl group are each independently —CH═CH—, — Optionally substituted by C≡C—, —O—, —CO—, —COO— or —OCO—,
PM represents 0, 1, 2, 3 or 4;
C ^M1 and C ^M2 are each independently
(D) 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- or -S- And (e) a 1,4-phenylene group (one —CH═ present in this group or two or more —CH═ not adjacent to each other may be replaced by —N═).
A group selected from the group consisting of: wherein one or two or more hydrogen atoms in the group (d) and group (e) are each independently substituted with a cyano group, a fluorine atom or a chlorine atom; Well,
K ^M1 and K ^M2 are each independently a single bond, —CH ₂ CH ₂ —, — (CH ₂ ) ₄ —, —OCH ₂ —, —CH ₂ O—, —OCF ₂ —, —CF ₂ O—, -COO-, -OCO- or -C≡C-
When PM is 2, 3 or 4 and there are a plurality of K ^M1 , they may be the same or different, and when PM is 2, 3 or 4 and there are a plurality of C ^M2 They may be the same or different,
X ^M1 and X ^M3 each independently represent a hydrogen atom, a chlorine atom or a fluorine atom,
X ^M2 represents a hydrogen atom, a fluorine atom, a chlorine atom, a cyano group, a trifluoromethyl group, a fluoromethoxy group, a difluoromethoxy group, a trifluoromethoxy group, or a 2,2,2-trifluoroethyl group. However, the compound represented by the general formula (ii), the compound represented by the general formula (X-4), the compound represented by the general formula (XI-1), and the general formula (VIII-1) Excluding compounds. )  A liquid crystal display device using the composition according to claim 1.  A liquid crystal display element for IPS mode, OCB mode, ECB mode, VA mode, or FFS mode using the composition according to claim 1.  A liquid crystal display using the liquid crystal display element according to claim 7.