TWI730163B - Liquid crystal element - Google Patents

Abstract

The main characteristics required for the next-generation displays include flexibility applicable to flexible displays, penetrability applicable to transmissive displays, and power saving. The present invention provides a liquid crystal element, which can ensure the above-mentioned characteristics, and can be applied not only to the forward mode type in which no voltage is applied and is in a penetrating state when no voltage is applied, but also can be applied to no voltage applied. When it is a penetrating state, when a voltage is applied, it is a reverse mode of non-penetrating state.

The present invention provides a liquid crystal element comprising a phase-separated liquid crystal layer containing a liquid crystal composition and an alignment polymer, a homogeneous alignment film, and electrodes, the liquid crystal composition exhibits positive dielectric anisotropy, and the alignment polymer is based on One or more of the polymerizable compounds with mesogenic groups represented by the general formula (i) are formed by ultraviolet curing, and the mesogenic groups in the above-mentioned aligning polymer are aligned into a homogeneous alignment film. The direction of the alignment control force.

Description

Liquid crystal element

The present invention relates to a liquid crystal element.

The polymer dispersed liquid crystal display device (PD-LCD) is a liquid crystal device method in which the liquid crystal and the polymer are separated from each other and a polymer network formed by the polymer is formed. Since PD-LCD is a display method that uses the contrast ratio between the transparent state and the white turbid state, it does not require an optical film such as a polarizing plate. Therefore, compared with TN, STN, IPS, or VA mode liquid crystal display elements that use polarizers, it has the advantage of realizing a clear display. Also, because the element is simple in structure, it is used in dimmer glass, etc. The use of shutters, clocks and other chain segment display uses. In addition, in order to realize high-precision display, it is also being explored in combination with actively driven display elements, and applied to projectors, reflective displays, etc. (Patent Documents 1, 2).

In recent years, liquid crystal display devices that have not been designed before, such as transmissive displays and flexible displays, have also been developed toward practical use.

[Prior Technical Literature] [Patent Literature]

Patent Document 1: Japanese Patent Application Publication No. 5-119302

Patent Document 2: Japanese Patent Application Publication No. 2006-308883

The main characteristics required for next-generation displays include flexibility applicable to flexible displays, penetrability applicable to transmissive displays, and power saving.

The present invention provides a liquid crystal element that can be applied to a polymer dispersed liquid crystal element, which can ensure the above-mentioned characteristics, and can be applied not only to a forward mode that is non-penetrating when no voltage is applied, and is in a penetrating state when voltage is applied The type can also be applied to the reverse mode type that is in the penetrating state when no voltage is applied and in the non-penetrating state when voltage is applied.

The inventors of the present invention combined a liquid crystal composition having positive dielectric anisotropy with various polymers and verified the performance of the PD-LCD to complete the present invention. That is, the present invention provides a liquid crystal element including a phase-separated liquid crystal layer containing a liquid crystal composition and an alignment polymer, a homogeneous alignment film, and electrodes, the liquid crystal composition exhibiting positive dielectric anisotropy, and the alignment polymer The material system is formed by curing one or two or more polymerizable compounds having mesogenic groups represented by general formula (i) with ultraviolet rays, and the mesogenic groups in the above-mentioned aligning polymer are aligned in a homogeneous alignment The direction of the alignment control force in the film.

(In the formula, P ⁱ¹ represents a polymerizable functional group; Sp ⁱ¹ represents a single bond or an alkylene group with 1 to 15 carbon atoms. One or two or more -CH ₂ -in the alkylene group may not be directly oxygen atom. The adjacent way is replaced by -O-, -CH=CH-, -CO-, -C≡C-, -OCO- or -COO-; R ⁱ¹ represents -Sp ⁱ¹ -P ⁱ¹ , hydrogen atom, fluorine atom, A cyano group, an alkyl group with 1 to 15 carbon atoms in which the hydrogen atom may be substituted by a halogen atom, an alkoxy group with 1 to 15 carbon atoms in which the hydrogen atom may be substituted by a halogen atom, and a hydrogen atom may also be substituted by a halogen atom The alkenyl group with 1 to 15 carbon atoms or the alkenyloxy group with 1 to 15 carbon atoms in which the hydrogen atom can be replaced by a halogen atom; A ⁱ¹ , A ⁱ² and A ⁱ³ are independently selected from, (a) inverse Formula-1,4-cyclohexylene (one methylene group or two or more non-adjacent methylene groups in the group can also be substituted by -O- or -S-), (b) Phenyl (1 -CH= or 2 or more non-adjacent -CH= in the group can also be substituted by a nitrogen atom), and (c) cyclohexenylene, bicyclic (2.2.2) A group in the group consisting of octyl, piperidinyl, naphthyl, decahydronaphthyl, and tetrahydronaphthyl; one of the above-mentioned groups (a), (b), and (c) Or two or more hydrogen atoms can also be independently replaced by fluorine atoms, chlorine atoms, alkyl groups with 1 to 8 carbon atoms, halogenated alkyl groups with 1 to 8 carbon atoms, and halogenated alkoxy groups with 1 to 8 carbon atoms. Groups, alkoxy groups with 1 to 8 carbon atoms, or -Sp ⁱ¹ -P ⁱ¹ substitution; when there are multiple A ⁱ³ , A ⁱ³ may be the same or different; Z ⁱ¹ and Z ⁱ² each independently represent a single Bond, -O-, -S-, -OCH ₂ -, -CH ₂ O-, -CO- _{, -C 2} H ₄ -, -COO-, -OCO-, _{-OCOOCH 2} -, -CH _{2 OCOO-} , -CO-NR ¹¹ -, -NR ¹¹ -CO-, -SCH ₂ -, -CH ₂ S-, -CH=CH-COO-, -OOC-CH=CH-, -COOC ₂ H ₄ -,- OCOC ₂ H ₄ -, -C ₂ H ₄ OCO-, -C ₂ H ₄ COO-, -OCOCH ₂ -, -CH ₂ COO-, -CH=CH-, -CF=CH-, -CH=CF- , -CF ₂ -, -CF ₂ O-, -OCF ₂ -, -CF ₂ CH ₂ -, -CH ₂ CF ₂ -, -CF ₂ CF ₂ -or -C≡C- (where R ⁱ¹ represents (Alkyl group with carbon 1~4), when there are multiple Z ⁱ² , they can be the same or different; when there are multiple -Sp ⁱ¹ -P ⁱ¹ , they can be the same or different)

By means of the present invention, it is possible to obtain devices that can be applied to new applications or driving methods while making full use of the advantages of the conventional PD-LCD.

For example, by combining the liquid crystal element of the present invention and a pair of polarizing plates arranged in a crossed Nichol configuration, the brightness of the transmitted light from the backlight can be adjusted. That is, it is possible to switch between black display and white display, and further, it is possible to perform tone display between these displays by adjusting the applied voltage. By combining the liquid crystal element of the present invention with an actively driven display element, or directly driving the liquid crystal element of the present invention, and used in a transparent or reflective display device, various displays can be displayed.

11‧‧‧First transparent substrate

12‧‧‧Second transparent substrate

2‧‧‧Electrode

3‧‧‧Homogeneous alignment film

4‧‧‧Liquid crystal molecules

5‧‧‧Orientation polymer

6‧‧‧Polarizer

7‧‧‧The direction of the alignment control force of the homogeneous alignment film

FIG. 1 is an example of the structure of the liquid crystal display element of the present invention, and is a diagram schematically showing a state where no voltage is applied.

Fig. 2 is a diagram schematically showing the state of voltage application in Fig. 1.

FIG. 3 is an example of the structure of the liquid crystal display element of the present invention, and is a diagram schematically showing a state where no voltage is applied.

FIG. 4 is a diagram schematically showing the state of applying voltage in FIG. 3.

Fig. 5 is a diagram showing Fig. 3 from a vertical direction with respect to the transparent substrate.

Fig. 6 is a diagram showing Fig. 4 from a vertical direction with respect to the transparent substrate.

(Liquid crystal composition)

The liquid crystal composition of the present invention can be constituted by arbitrarily combining the liquid crystal compound groups shown below. In the following, unless specifically limited, when only expressed as a composition, it refers to a liquid crystal composition.

The composition preferably contains one or more compounds represented by the general formula (J). These compounds are equivalent to compounds with positive dielectric properties (Δε greater than 2).

(In the formula, R ^J1 represents an alkyl group with 1 to 8 carbon atoms. One of the alkyl groups or two or more non-adjacent -CH ₂ -s may be independently replaced by -CH=CH-,- C≡C-, -O-, -CO-, -COO- or -OCO- substitution; n ^J1 represents 0, 1, 2, 3 or 4; A ^J1 , A ^J2 and A ^J3 each independently represent a choice ( a) 1,4- cyclohexylene (in the presence of a group -CH ₂ - adjacent to the two or more of -CH ₂ - may be replaced by -O-), (b) 1,4 -Phenylene (1 -CH= or 2 or more non-adjacent -CH= in the group can also be substituted by -N=), and (c) naphthalene-2,6-diyl, 1,2,3,4-Tetrahydronaphthalene-2,6-diyl or decahydronaphthalene-2,6-diyl (present in naphthalene-2,6-diyl or 1,2,3,4-tetrahydronaphthalene-2,6-diyl One of the hydronaphthalene-2,6-diyl groups -CH= or two or more non-adjacent -CH= groups can also be substituted by -N=), the above group (a), One or more hydrogen atoms in the group (b) and group (c) can also be independently replaced by a cyano group, a fluorine atom, a chlorine atom, a methyl group, a trifluoromethyl group, or a trifluoromethoxy group. Group substitution; Z ^J1 and Z ^J2 each independently represent 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 n ^J1 is 2, 3 or 4 and there are multiple A ^J2s , they can be the same or different, and n ^J1 is 2, 3 Or 4 and when there are multiple Z ^J1 , they may be the same or different; X ^J1 represents a hydrogen atom, a fluorine atom, a chlorine atom, a cyano group, a trifluoromethyl group, a fluoromethoxy group, a difluoromethoxy group , Trifluoromethoxy or 2,2,2-trifluoroethyl)

In the general formula (J), R ^{J1 is} preferably an alkyl group with 1 to 8 carbon atoms, an alkoxy group with 1 to 8 carbon atoms, an alkenyl group with 2 to 8 carbon atoms, or an alkenyl group with 2 to 8 carbon atoms. The alkenyloxy group is preferably an alkyl group with 1 to 5 carbon atoms, an alkoxy group with 1 to 5 carbon atoms, an alkenyl group with 2 to 5 carbon atoms, or an alkenyloxy group with 2 to 5 carbon atoms, and more It is preferably an alkyl group with 1 to 5 carbon atoms or an alkenyl group with 2 to 5 carbon atoms, more preferably an alkyl group with 2 to 5 carbon atoms or an alkenyl group with 2 to 3 carbon atoms, particularly preferably a carbon atom Number 3 alkenyl (propenyl).

When reliability is important, R ^{J1 is} preferably an alkyl group, and when viscosity reduction is important, it is preferably an alkenyl group.

烷等飽和環結構之情形時，較佳為直鏈狀之碳原子數1~5之烷基、直鏈狀之碳原子數1~4之烷氧基及直鏈狀之碳原子數2~5之烯基。為了使向列相穩定，較佳為碳原子及存在之情形時之氧原子的合計在5以下，較佳為直鏈狀。 In addition, when the ring structure to which it is bonded is a phenyl group (aromatic), it is preferably a linear alkyl group with 1 to 5 carbon atoms, and a linear alkyl group with 1 to 4 carbon atoms. The oxy group and the alkenyl group with 4~5 carbon atoms are bonded to the ring structure of cyclohexane, pyran and two

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

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

When it is required to increase Δn, A ^J1 , A ^J2 and A ^{J3 are} preferably independently aromatic. In order to improve the response speed, they are preferably aliphatic, and preferably represent trans-1,4- Cyclohexylene, 1,4-phenylene, 1,4-cyclohexenylene, 1,4-bicyclo(2.2.2) octylene, piperidine-1,4-diyl, naphthalene-2, 6-diyl, decahydronaphthalene-2,6-diyl or 1,2,3,4-tetrahydronaphthalene-2,6-diyl, which may be substituted by a fluorine atom, and more preferably represent the following structure,

It is more preferable to show the following structure.

Z ^J1 and Z ^J2 preferably each independently represent -CH ₂ O-, -OCH ₂ -, -CF ₂ O-, -CH ₂ CH ₂ -, -CF ₂ CF ₂ -or a single bond, more preferably- OCH ₂ -, -CF ₂ O-, -CH ₂ CH ₂ -or a single bond, particularly preferably -OCH ₂ -, -CF ₂ O- or a single bond.

X ^{J1 is} preferably a fluorine atom or a trifluoromethoxy group, and preferably a fluorine atom.

n ^{J1 is} preferably 0, 1, 2 or 3, preferably 0, 1 or 2. When the focus is on improving the situation of △ε, it is preferably 0 or 1, and when the situation of _{T NI is emphasized, it is more} Preferably, it is 1 or 2.

The types of compounds that can be combined are not particularly limited, and they can be used in combination according to the required properties such as solubility at low temperature, transition temperature, electrical reliability, and birefringence. Regarding the types of compounds used, for example, as an embodiment of the present invention, there are one type, two types, and three types. Furthermore, in another embodiment of this invention, there are 4 types, 5 types, 6 types, and 7 or more types.

In the composition, the content of the compound represented by the general formula (J) must be based on solubility at low temperature, transition temperature, electrical reliability, birefringence, process suitability, dripping traces, residual image, media Adjust the required performance such as electrical anisotropy as appropriate.

Relative to the total amount of the composition, the lower limit of the preferred content of the compound represented by the general formula (J) is 1%, 10%, 20%, 30%, 40%, 50%, 55%, 60% , 65%, 70%, 75%, 80%. With regard to the preferred upper limit of the content, for example, in one aspect of the present invention, it is 95%, 85%, 75%, 65%, 55%, 45%, 35%, 25% relative to the total amount of the composition. %.

When the viscosity of the composition is kept low and a composition with a fast response speed is required, it is preferable to make the above-mentioned lower limit value low and the upper limit value low. Furthermore, when the T _{NI of} the composition is kept high and a composition with good temperature stability is required, it is preferable to make the above-mentioned lower limit value low and the upper limit value low. Moreover, when it is desired to increase the dielectric anisotropy in order to keep the driving voltage low, it is preferable to make the above-mentioned lower limit value high and the upper limit value high.

When reliability is important, R ^{J1 is} preferably an alkyl group, and when viscosity reduction is important, it is preferably an alkenyl group.

The compound represented by general formula (J) is preferably a compound represented by general formula (M) and a compound represented by general formula (K).

The composition preferably contains one or more compounds represented by the general formula (M). Such compounds are equivalent to compounds with positive dielectric properties (Δε greater than 2).

(In the formula, R ^M1 represents an alkyl group with 1 to 8 carbon atoms. One of the alkyl groups or two or more non-adjacent -CH ₂ -s may be independently replaced by -CH=CH-,- C≡C-, -O-, -CO-, -COO- or -OCO- substitution; n ^M1 represents 0, 1, 2, 3 or 4; A ^M1 and A ^M2 each independently represent one of (a)1 , 4-cyclohexylene (in the presence of a group -CH ₂ - adjacent to the two or more of -CH ₂ - may be substituted with -O- or -S-), and (b) 1, 4-phenylene group (1 -CH= or 2 or more non-adjacent -CH= which may be substituted by -N= in the group), the above group (a) And one or more hydrogen atoms on group (b) can also be independently substituted by cyano, fluorine or chlorine atoms; Z ^M1 and Z ^M2 each independently represent 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-; where n ^M1 is 2, When there are 3 or 4 and there are multiple A ^M2 , they can be the same or different. When n ^M1 is 2, 3 or 4 and there are multiple Z ^M1 , they can 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, and a trifluoromethyl group. Oxy or 2,2,2-trifluoroethyl.

In the general formula (M), R ^{M1 is} preferably an alkyl group with 1 to 8 carbon atoms, an alkoxy group with 1 to 8 carbon atoms, an alkenyl group with 2 to 8 carbon atoms, or an alkenyl group with 2 to 8 carbon atoms. The alkenyloxy group is preferably an alkyl group with 1 to 5 carbon atoms, an alkoxy group with 1 to 5 carbon atoms, an alkenyl group with 2 to 5 carbon atoms, or an alkenyloxy group with 2 to 5 carbon atoms, and more It is preferably an alkyl group with 1 to 5 carbon atoms or an alkenyl group with 2 to 5 carbon atoms, more preferably an alkyl group with 2 to 5 carbon atoms or an alkenyl group with 2 to 3 carbon atoms, particularly preferably a carbon atom Number 3 alkenyl (propenyl).

When reliability is important, R ^{M1 is} preferably an alkyl group, and when viscosity reduction is important, it is preferably an alkenyl group.

烷等飽和環結構之情形時，較佳為直鏈狀之碳原子數1~5之烷基、直鏈狀之碳原子數1~4之烷氧基及直鏈狀之碳原子數2~5之烯基。為了使向列相穩定，較佳為碳原子及存在之情形時之氧原子的合計在5以下，較佳為直鏈狀。 In addition, when the ring structure to which it is bonded is a phenyl group (aromatic), it is preferably a linear alkyl group with 1 to 5 carbon atoms, and a linear alkyl group with 1 to 4 carbon atoms. The oxy group and the alkenyl group with 4~5 carbon atoms are bonded to the ring structure of cyclohexane, pyran and two

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

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

A ^M1 and A ^M2 are independent of each other. When it is required to increase Δn, they are preferably aromatic. In order to improve the response speed, they are preferably aliphatic, and preferably represent trans-1,4-cyclohexylene, 1,4-phenylene, 2-fluoro-1,4-phenylene, 3-fluoro-1,4-phenylene, 3,5-difluoro-1,4-phenylene, 2,3 -Difluoro-1,4-phenylene, 1,4-cyclohexenylene, 1,4-bicyclo(2.2.2) octyl, piperidine-1,4-diyl, naphthalene-2, 6-diyl, decahydronaphthalene-2,6-diyl or 1,2,3,4-tetrahydronaphthalene-2,6-diyl, more preferably represents the following structure,

It is more preferable to show the following structure.

Z ^M1 and Z ^M2 is preferably each independently represent _{-CH 2 O -, - CF 2} O -, - CH 2 CH 2 -, - CF 2 CF 2 - or a single bond, more preferably -CF ₂ O-, -CH ₂ CH ₂ -or a single bond, particularly preferably -CF ₂ O- or a single bond.

n ^{M1 is} preferably 0, 1, 2 or 3, preferably 0, 1 or 2. When the focus is on improving the situation of △ε, it is preferably 0 or 1, and when the situation of _{T NI is emphasized, it is more} Preferably, it is 1 or 2.

The types of compounds that can be combined are not particularly limited, and they can be used in combination according to the required properties such as solubility at low temperature, transition temperature, electrical reliability, and birefringence. Regarding the types of compounds used, for example, as an embodiment of the present invention, there are one type, two types, and three types. Furthermore, in another embodiment of this invention, there are 4 types, 5 types, 6 types, and 7 or more types.

In the composition, the content of the compound represented by the general formula (M) must be based on solubility at low temperature, transition temperature, electrical reliability, birefringence, process suitability, dripping traces, residual image, media Adjust the required performance such as electrical anisotropy as appropriate.

Relative to the total amount of the composition, the lower limit of the preferred content of the compound represented by formula (M) is 1%, 10%, 20%, 30%, 40%, 50%, 55%, 60%, 65%, 70%, 75%, 80%. With regard to the preferred upper limit of the content, for example, in one aspect of the present invention, it is 95%, 85%, 75%, 65%, 55%, 45%, 35%, 25% relative to the total amount of the composition. %.

When the viscosity of the composition is kept low and a composition with a fast response speed is required, it is preferable to make the above-mentioned lower limit value low and the upper limit value low. Furthermore, when the T _{NI of} the composition is kept high and a composition with good temperature stability is required, it is preferable to make the above-mentioned lower limit value low and the upper limit value low. Moreover, when it is desired to increase the dielectric anisotropy in order to keep the driving voltage low, it is preferable to make the above-mentioned lower limit value high and the upper limit value high.

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

(In the formula, R ^M11 represents an alkyl group with 1 to 5 carbon atoms, an alkenyl group with 2 to 5 carbon atoms or an alkoxy group with 1 to 4 carbon atoms, and X ^M11 to X ^M15 each independently represent a hydrogen atom or Fluorine atom, Y ^M11 represents fluorine atom or OCF ₃ )

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

Relative to the total amount of the composition, the lower limit of the preferred content of the compound represented by formula (M-1) is 1%, 2%, 5%, 8%, 10%, 13%, 15%, 18 %, 20%, 22%, 25%, 30%. The preferred upper limit of the content is 30%, 28%, 25%, 23%, 20%, 18%, 15%, 13%, 10%, 8%, 5%.

When the viscosity of the composition is kept low and a composition with a fast response speed is required, it is preferable to make the above-mentioned lower limit value low and the upper limit value low. Furthermore, when the T _{NI of} the composition is kept high and a composition with good temperature stability is required, it is preferable to make the above-mentioned lower limit value low and the upper limit value low. Moreover, when it is desired to increase the dielectric anisotropy in order to keep the driving voltage low, it is preferable to make the above-mentioned lower limit value high and the upper limit value high.

Further, the compound represented by the general formula (M-1) is specifically preferably the compound represented by the formula (M-1.1) to the formula (M-1.4), preferably the formula (M-1.1) or the formula ( The compound represented by M-1.2) is more preferably a compound represented by formula (M-1.2). Moreover, it is also preferable to use the compound represented by formula (M-1.1) or formula (M-1.2) at the same time.

Relative to the total amount of the composition, the lower limit of the preferred content of the compound represented by formula (M-1.1) is 1%, 2%, 5%, and 6%. The preferred upper limit of the content is 15%, 13%, 10%, 8%, 5%.

Relative to the total amount of the composition, the lower limit of the preferable content of the compound represented by formula (M-1.2) is 1%, 2%, 5%, and 6%. The preferred upper limit of the content is 30%, 25%, 23%, 20%, 18%, 15%, 13%, 10%, 8%.

With respect to the total amount of the composition, the lower limit of the preferable total content of the compounds represented by formula (M-1.1) and formula (M-1.2) is 1%, 2%, 5%, and 6%. The preferred upper limit of the content is 30%, 25%, 23%, 20%, 18%, 15%, 13%, 10%, 8%.

Furthermore, the compound represented by general formula (M) is preferably a compound selected from the group of compounds represented by general formula (M-2), for example.

(In the formula, R ^M21 represents an alkyl group with 1 to 5 carbon atoms, an alkenyl group with 2 to 5 carbon atoms, or an alkoxy group with 1 to 4 carbon atoms. X ^M21 and X ^M22 each independently represent a hydrogen atom or Fluorine atom, Y ^M21 represents fluorine atom, chlorine atom or OCF ₃ )

Relative to the total amount of the composition, the lower limit of the preferred content of the compound represented by formula (M-1) is 1%, 2%, 5%, 8%, 10%, 13%, 15%, 18 %, 20%, 22%, 25%, 30%. The preferred upper limit of the content is 30%, 28%, 25%, 23%, 20%, 18%, 15%, 13%, 10%, 8%, 5%.

When the viscosity of the composition is kept low and a composition with a fast response speed is required, it is preferable to make the above-mentioned lower limit value low and the upper limit value low. Furthermore, when the T _{NI of} the composition is kept high and a composition that is difficult to produce afterimages is required, it is preferable to make the above-mentioned lower limit value low and the upper limit value low. Moreover, when it is desired to increase the dielectric anisotropy in order to keep the driving voltage low, it is preferable to make the above-mentioned lower limit value high and the upper limit value high.

Further, the compound represented by the general formula (M-2) is preferably the compound represented by the formula (M-2.1) to the formula (M-2.5), preferably the formula (M-2.3) or/and the formula (M- 2.5) The compound represented.

Relative to the total amount of the composition, the lower limit of the preferable content of the compound represented by formula (M-2.2) is 1%, 2%, 5%, and 6%. The preferred upper limit of the content is 15%, 13%, 10%, 8%, 5%.

Relative to the total amount of the composition, the lower limit of the preferred content of the compound represented by formula (M-2.3) is 1%, 2%, 5%, and 6%. The preferred upper limit of the content is 30%, 25%, 23%, 20%, 18%, 15%, 13%, 10%, 8%.

Relative to the total amount of the composition, the lower limit of the preferable content of the compound represented by formula (M-2.5) is 1%, 2%, 5%, and 6%. The preferred upper limit of the content is 30%, 25%, 23%, 20%, 18%, 15%, 13%, 10%, 8%.

Relative to the total amount of the composition, the lower limit of the total content of the compounds represented by formula (M-2.2), (M-2.3) and formula (M-2.5) is 1%, 2%, 5 %, 6%. The upper limit of the preferred content is 30%, 25%, 23%, 20%, 18%, 15%, 13%, 10%, 8%.

The content is preferably 1% or more relative to the total amount of the composition, more preferably 5% or more, more preferably 8% or more, more preferably 10% or more, more preferably 14% or more, particularly preferably 16% the above. In addition, considering solubility at low temperature, transition temperature, electrical reliability, etc., the maximum ratio is preferably 30% or less, more preferably 25% or less, more preferably 22% or less, and particularly preferably less than 20 %.

The compound represented by general formula (M) used in the composition is preferably a compound represented by general formula (M-3).

(In the formula, R ^M31 represents an alkyl group with 1 to 5 carbon atoms, an alkenyl group with 2 to 5 carbon atoms or an alkoxy group with 1 to 4 carbon atoms, and X ^M31 to X ^M36 each independently represent a hydrogen atom or Fluorine atom, Y ^M31 represents fluorine atom, chlorine atom or OCF ₃ )

Compounds that can be combined are not particularly limited. Considering solubility at low temperature, transition temperature, electrical reliability, birefringence, etc., it is preferable to combine one to two or more.

Regarding the content of the compound represented by the general formula (M-3), considering solubility at low temperature, transition temperature, electrical reliability, birefringence and other characteristics, there are upper and lower limits in each embodiment Limit.

Relative to the total amount of the composition, the lower limit of the preferred content of the compound represented by formula (M-3) is 1%, 2%, 4%, 5%, 8%, 10%, 13%, 15 %, 18%, 20%. The preferred upper limit of the content is 20%, 18%, 15%, 13%, 10%, 8%, 5%.

Further, the compound represented by the general formula (M-3) used in the composition is specifically preferably the compound represented by the formula (M-3.1) to the formula (M-3.8), and among them, the compound is preferably Contains the compound represented by formula (M-3.1) and/or formula (M-3.2).

Relative to the total amount of the composition, the lower limit of the preferred content of the compound represented by formula (M-3.1) is 1%, 2%, 4%, 5%, 8%, 10%, 13%, 15 %, 18%, 20%. The preferred upper limit of the content is 20%, 18%, 15%, 13%, 10%, 8%, 5%.

Relative to the total amount of the composition, the lower limit of the preferred content of the compound represented by formula (M-3.2) is 1%, 2%, 4%, 5%, 8%, 10%, 13%, 15 %, 18%, 20%. The preferred upper limit of the content is 20%, 18%, 15%, 13%, 10%, 8%, 5%.

Relative to the total amount of the composition, the lower limit of the total content of the compounds represented by formula (M-3.1) and formula (M-3.2) is 1%, 2%, 4%, 5%, 8 %, 10%, 13%, 15%, 18%, 20%. The preferred upper limit of the content is 20%, 18%, 15%, 13%, 10%, 8%, 5%.

Furthermore, the compound represented by general formula (M) is preferably a compound selected from the group represented by general formula (M-4).

(In the formula, R ^M41 represents an alkyl group with 1 to 5 carbon atoms, an alkenyl group with 2 to 5 carbon atoms or an alkoxy group with 1 to 4 carbon atoms, and X ^M41 to X ^M48 each independently represent a fluorine atom or Hydrogen atom, Y ^M41 represents fluorine atom, chlorine atom or OCF ₃ )

Compounds that can be combined are not particularly limited, and considering solubility at low temperature, transition temperature, electrical reliability, birefringence, etc., it is preferable to combine one, two, or three or more types.

Regarding the content of the compound represented by the general formula (M-4), considering the solubility at low temperature, transition temperature, electrical reliability, birefringence and other characteristics, each embodiment has its upper limit and lower limit Limit.

Relative to the total amount of the composition, the lower limit of the preferred content of the compound represented by formula (M-4) is 1%, 2%, 4%, 5%, 8%, 10%, 13%, 15 %, 18%, 20%. The preferred upper limit of the content is 30%, 28%, 25%, 23%, 20%, 18%, 15%, 13%, 10%, 8%, 5%.

When the composition is used for a liquid crystal display device with a small cell gap, it is more suitable that the content of the compound represented by the general formula (M-4) is large. When it is used for liquid crystal display devices with a small driving voltage, it is more suitable that the content of the compound represented by the general formula (M-4) is large. In addition, when used for liquid crystal display devices used in a low-temperature environment, it is more suitable that the content of the compound represented by the general formula (M-4) is small. In the case of a composition used for a liquid crystal display element with a fast response speed, it is more suitable that the content of the compound represented by the general formula (M-4) is small.

Further, the compound represented by the general formula (M-4) used in the composition is specifically preferably the compound represented by the formula (M-4.1) to the formula (M-4.4), and among them, preferably It contains the compound represented by formula (M-4.2) to formula (M-4.4), and more preferably contains the compound represented by formula (M-4.2).

Furthermore, the compound represented by general formula (M) is preferably a compound represented by general formula (M-5).

(In the formula, R ^M51 represents an alkyl group with 1 to 5 carbon atoms, an alkenyl group with 2 to 5 carbon atoms or an alkoxy group with 1 to 4 carbon atoms, and X ^M51 and X ^M52 each independently represent a hydrogen atom or Fluorine atom, Y ^M51 represents fluorine atom, chlorine atom or OCF ₃ )

The types of compounds that can be combined are not limited, and considering solubility at low temperature, transition temperature, electrical reliability, birefringence, etc., they are appropriately combined for use in each embodiment. For example, in one embodiment of the present invention, it is 1 type, in another embodiment, it is 2 types of combinations, in still another embodiment, it is 3 types, and in still another embodiment, it is 4 types The combination is 5 combinations in still another embodiment, and 6 or more combinations in still another embodiment.

Relative to the total amount of the composition, the lower limit of the preferred content of the compound represented by formula (M-5) is 1%, 2%, 5%, 8%, 10%, 13%, 15%, 18 %, 20%, 22%, 25%, 30%. The upper limit of the preferred content is 50%, 45%, 40%, 35%, 33%, 30%, 28%, 25%, 23%, 20%, 18%, 15%, 13%, 10 %, 8%, 5%.

When the viscosity of the composition is kept low and a composition with a fast response speed is required, it is preferable to make the above-mentioned lower limit value low and the upper limit value low. Furthermore, when the T _{NI of} the composition is kept high and a composition that is difficult to produce afterimages is required, it is preferable to make the above-mentioned lower limit value low and the upper limit value low. Moreover, when it is desired to increase the dielectric anisotropy in order to keep the driving voltage low, it is preferable to make the above-mentioned lower limit value high and the upper limit value high.

Further, the compound represented by the general formula (M-5) is preferably the compound represented by the formula (M-5.1) to the formula (M-5.4), preferably the formula (M-5.1) to the formula (M-5.4) The compound represented.

Relative to the total amount of the composition, the lower limit of the preferable content of the compound is 1%, 2%, 5%, 8%, 10%, 13%, 15%. The preferred upper limit of the content is 30%, 28%, 25%, 23%, 20%, 18%, 15%, 13%, 10%, 8%, 5%.

Further, the compound represented by the general formula (M-5) is preferably the compound represented by the formula (M-5.11) to the formula (M-5.17), preferably the formula (M-5.11), the formula (M-5.13) And the compound represented by formula (M-5.17).

Relative to the total amount of the composition, the lower limit of the preferable content of the compound is 1%, 2%, 5%, 8%, 10%, 13%, 15%. The preferred upper limit of the content is 30%, 28%, 25%, 23%, 20%, 18%, 15%, 13%, 10%, 8%, 5%.

Further, the compound represented by the general formula (M-5) is preferably the compound represented by the formula (M-5.21) to the formula (M-5.28), preferably the formula (M-5.21), the formula (M-5.22) , Compounds represented by formula (M-5.23) and formula (M-5.25).

Relative to the total amount of the composition, the lower limit of the preferable content of the compound is 1%, 2%, 5%, 8%, 10%, 13%, 15%, 18%, 20%, 22% , 25%, 30%. The upper limit of the preferred content is 40%, 35%, 33%, 30%, 28%, 25%, 23%, 20%, 18%, 15%, 13%, 10%, 8%, 5 %.

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

(In the formula, R ^M61 represents an alkyl group with 1 to 5 carbon atoms, an alkenyl group with 2 to 5 carbon atoms, or an alkoxy group with 1 to 4 carbon atoms, and X ^M61 to X ^M64 each independently represent a fluorine atom or Hydrogen atom, Y ^M61 represents fluorine atom, chlorine atom or OCF ₃ )

The types of compounds that can be combined are not limited, and considering solubility at low temperature, transition temperature, electrical reliability, birefringence, etc., they are appropriately combined in each embodiment.

Relative to the total amount of the composition, the lower limit of the preferred content of the compound represented by formula (M-6) is 1%, 2%, 4%, 5%, 8%, 10%, 13%, 15 %, 18%, 20%. The preferred upper limit of the content is 30%, 28%, 25%, 23%, 20%, 18%, 15%, 13%, 10%, 8%, 5%.

When the composition is used for a liquid crystal display device with a small driving voltage, it is suitable to have a larger content of the compound represented by the general formula (M-6). Moreover, in the case of a composition used for a liquid crystal display element with a fast response speed, it is suitable to make the content of the compound represented by general formula (M-6) small.

Further, the compound represented by the general formula (M-6) is specifically preferably the compound represented by the formula (M-6.1) to the formula (M-6.4), and among them, preferably contains the formula (M-6.2) And the compound represented by formula (M-6.4).

Relative to the total amount of the composition, the lower limit of the preferable content of the compound is 1%, 2%, 4%, 5%, 8%, 10%, 13%, 15%, 18%, 20% . The preferred upper limit of the content is 30%, 28%, 25%, 23%, 20%, 18%, 15%, 13%, 10%, 8%, 5%.

Furthermore, the compound represented by the general formula (M-6) is specifically preferably the compound represented by the formula (M-6.11) to the formula (M-6.14), and among them, the compound preferably contains the formula (M-6.12) And the compound represented by formula (M-6.14).

Relative to the total amount of the composition, the lower limit of the preferable content of the compound is 1%, 2%, 4%, 5%, 8%, 10%, 13%, 15%, 18%, 20% . The preferred upper limit of the content is 30%, 28%, 25%, 23%, 20%, 18%, 15%, 13%, 10%, 8%, 5%.

Furthermore, the compound represented by the general formula (M-6) is specifically preferably the compound represented by the formula (M-6.21) to the formula (M-6.24), and among them, the compound preferably contains the formula (M-6.21) , Compounds represented by formula (M-6.22) and formula (M-6.24).

Relative to the total amount of the composition, the lower limit of the preferable content of the compound is 1%, 2%, 4%, 5%, 8%, 10%, 13%, 15%, 18%, 20% . The preferred upper limit of the content is 30%, 28%, 25%, 23%, 20%, 18%, 15%, 13%, 10%, 8%, 5%.

Furthermore, the compound represented by general formula (M-6) is specifically preferably a compound represented by formula (M-6.31) to formula (M-6.34). Among them, it is preferable to contain the compound represented by formula (M-6.31) and formula (M-6.32).

Relative to the total amount of the composition, the lower limit of the preferable content of the compound is 1%, 2%, 4%, 5%, 8%, 10%, 13%, 15%, 18%, 20% . The preferred upper limit of the content is 30%, 28%, 25%, 23%, 20%, 18%, 15%, 13%, 10%, 8%, 5%.

Furthermore, the compound represented by the general formula (M-6) is specifically preferably the compound represented by the formula (M-6.41) to the formula (M-6.44), and among them, the compound preferably contains the formula (M-6.42) The compound represented.

Relative to the total amount of the composition, the lower limit of the preferable content of the compound is 1%, 2%, 4%, 5%, 8%, 10%, 13%, 15%, 18%, 20% . The preferred upper limit of the content is 30%, 28%, 25%, 23%, 20%, 18%, 15%, 13%, 10%, 8%, 5%.

Furthermore, the compound represented by general formula (M) is preferably a compound selected from the group of compounds represented by general formula (M-7).

(In the formula, X ^M71 to X ^M76 each independently represent a fluorine atom or a hydrogen atom, R ^M71 represents an alkyl group with 1 to 5 carbon atoms, an alkenyl group with 2 to 5 carbon atoms, or an alkane with 1 to 4 carbon atoms ^Oxy group, Y M71 represents fluorine atom or OCF ₃ )

The type of the compound that can be combined is not particularly limited, and it is preferable to contain one to two kinds from these compounds, more preferably to contain one to three kinds, and even more preferably to contain one to four kinds.

Regarding the content of the compound represented by the general formula (M-7), considering the characteristics of solubility at low temperature, transition temperature, electrical reliability, birefringence, etc., each embodiment has its upper limit and lower limit. value.

Relative to the total amount of the composition, the lower limit of the preferred content of the compound represented by formula (M-7) is 1%, 2%, 4%, 5%, 8%, 10%, 13%, 15 %, 18%, 20%. The preferred upper limit of the content is 30%, 28%, 25%, 23%, 20%, 18%, 15%, 13%, 10%, 8%, 5%.

When the composition is used for a liquid crystal display device with a small cell gap, it is suitable to have a larger content of the compound represented by the general formula (M-7). When it is used for liquid crystal display device applications with a small driving voltage, it is more suitable to make the content of the compound represented by general formula (M-7) larger. Moreover, when it is used for liquid crystal display devices used in a low-temperature environment, it is more suitable to make the content of the compound represented by general formula (M-7) small. In the case of a composition used for a liquid crystal display element with a fast response speed, it is suitable to make the content of the compound represented by the general formula (M-7) smaller.

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

Relative to the total amount of the composition, the lower limit of the preferable content of the compound is 1%, 2%, 4%, 5%, 8%, 10%, 13%, 15%, 18%, 20% . The preferred upper limit of the content is 30%, 28%, 25%, 23%, 20%, 18%, 15%, 13%, 10%, 8%, 5%.

Furthermore, the compound represented by the general formula (M-7) is preferably the compound represented by the formula (M-7.11) to the formula (M-7.14), preferably the formula (M-7.11) and the formula (M-7.12) The compound represented.

Relative to the total amount of the composition, the lower limit of the preferable content of the compound is 1%, 2%, 4%, 5%, 8%, 10%, 13%, 15%, 18%, 20% . The preferred upper limit of the content is 30%, 28%, 25%, 23%, 20%, 18%, 15%, 13%, 10%, 8%, 5%.

Further, the compound represented by the general formula (M-7) is preferably the compound represented by the formula (M-7.21) to the formula (M-7.24), preferably the formula (M-7.21) and the formula (M-7.22) The compound represented.

Relative to the total amount of the composition, the lower limit of the preferable content of the compound is 1%, 2%, 4%, 5%, 8%, 10%, 13%, 15%, 18%, 20% . The preferred upper limit of the content is 30%, 28%, 25%, 23%, 20%, 18%, 15%, 13%, 10%, 8%, 5%.

Furthermore, the compound represented by general formula (M) is preferably a compound represented by general formula (M-8).

，1,4-伸苯基上之氫原子亦可被氟原子取代) (In the formula, X ^M81 to X ^M84 each independently represent a fluorine atom or a hydrogen atom, Y ^M81 represents a fluorine atom, a chlorine atom or -OCF ₃ , and R ^M81 represents an alkyl group with 1 to 5 carbon atoms and 2 to carbon atoms. Alkenyl group 5 or alkoxy group having 1 to 4 carbon atoms, A ^M81 and A ^M82 each independently represent 1,4-cyclohexylene, 1,4-phenylene or

, The hydrogen atom on 1,4-phenylene can also be replaced by fluorine atom)

Relative to the total amount of the composition, the lower limit of the preferred content of the compound represented by the general formula (M-8) is 1%, 2%, 4%, 5%, 8%, 10%, 13%, 15%, 18%, 20%. The preferred upper limit of the content is 30%, 28%, 25%, 23%, 20%, 18%, 15%, 13%, 10%, 8%, 5%.

When the viscosity of the composition is kept low and a composition with a fast response speed is required, it is preferable to make the above-mentioned lower limit value low and the upper limit value low. Furthermore, when a composition that is difficult to produce afterimages is required, it is preferable to make the above-mentioned lower limit value low and the upper limit value low. Moreover, when it is desired to increase the dielectric anisotropy in order to keep the driving voltage low, it is preferable to make the above-mentioned lower limit value high and the upper limit value high.

Further, the compound represented by the general formula (M-8) used in the composition is specifically preferably the compound represented by the formula (M-8.1) to the formula (M-8.4), and among them, the compound is preferably Contains compounds represented by formula (M-8.1) and formula (M-8.2).

Relative to the total amount of the composition, the lower limit of the preferable content of the compound is 1%, 2%, 4%, 5%, 8%, 10%, 13%, 15%, 18%, 20% . The preferred upper limit of the content is 30%, 28%, 25%, 23%, 20%, 18%, 15%, 13%, 10%, 8%, 5%.

Further, the compound represented by the general formula (M-8) used in the composition is specifically preferably the compound represented by the formula (M-8.11) to the formula (M-8.14), and among them, the compound is preferably Contains the compound represented by formula (M-8.12).

Relative to the total amount of the composition, the lower limit of the preferable content of the compound is 1%, 2%, 4%, 5%, 8%, 10%, 13%, 15%, 18%, 20% . The preferred upper limit of the content is 30%, 28%, 25%, 23%, 20%, 18%, 15%, 13%, 10%, 8%, 5%.

Furthermore, the compound represented by the general formula (M-8) used in the composition is specifically preferably the compound represented by the formula (M-8.21) to the formula (M-8.24), and among them, the compound is preferably Contains the compound represented by formula (M-8.22).

Relative to the total amount of the composition, the lower limit of the preferable content of the compound is 1%, 2%, 4%, 5%, 8%, 10%, 13%, 15%, 18%, 20% . The preferred upper limit of the content is 30%, 28%, 25%, 23%, 20%, 18%, 15%, 13%, 10%, 8%, 5%.

Further, the compound represented by the general formula (M-8) used in the composition is specifically preferably the compound represented by the formula (M-8.31) to the formula (M-8.34), and among them, the compound is preferably Contains the compound represented by formula (M-8.32).

Relative to the total amount of the composition, the lower limit of the preferable content of the compound is 1%, 2%, 4%, 5%, 8%, 10%, 13%, 15%, 18%, 20% . The preferred upper limit of the content is 30%, 28%, 25%, 23%, 20%, 18%, 15%, 13%, 10%, 8%, 5%.

Further, the compound represented by the general formula (M-8) used in the composition is specifically preferably the compound represented by the formula (M-8.41) to the formula (M-8.44), and among them, the compound is preferably Contains the compound represented by formula (M-8.42).

Relative to the total amount of the composition, the lower limit of the preferable content of the compound is 1%, 2%, 4%, 5%, 8%, 10%, 13%, 15%, 18%, 20% . The preferred upper limit of the content is 30%, 28%, 25%, 23%, 20%, 18%, 15%, 13%, 10%, 8%, 5%.

Further, the compound represented by the general formula (M-8) used in the composition is specifically preferably the compound represented by the formula (M-8.51) to the formula (M-8.54), and among them, the compound is preferably Contains the compound represented by formula (M-8.52).

Relative to the total amount of the composition, the lower limit of the preferable content of the compound is 1%, 2%, 4%, 5%, 8%, 10%, 13%, 15%, 18%, 20% . The preferred upper limit of the content is 30%, 28%, 25%, 23%, 20%, 18%, 15%, 13%, 10%, 8%, 5%.

Furthermore, the compound represented by general formula (M) may have the following partial structure in its structure.

(The black dots in the formula indicate the carbon atoms in the ring structure bonded by the above partial structure)

The compound having the above partial structure is preferably a compound represented by the general formulas (M-10) to (M-18).

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

(In the formula, X ^M101 and X ^M102 each independently represent a fluorine atom or a hydrogen atom, Y ^M101 represents a fluorine atom, a chlorine atom or -OCF ₃ , and R ^M101 represents an alkyl group with 1 to 5 carbon atoms and 2 to carbon atoms. 5 alkenyl or alkoxy with 1 to 4 carbon atoms, W ^M101 and W ^M102 each independently represent -CH ₂ -or -O-)

Relative to the total amount of the composition, the lower limit of the preferred content of the compound represented by the general formula (M-10) is 1%, 2%, 4%, 5%, 8%, 10%, 13%, 15%, 18%, 20%. The preferred upper limit of the content is 30%, 28%, 25%, 23%, 20%, 18%, 15%, 13%, 10%, 8%, 5%.

When the viscosity of the composition is kept low and a composition with a fast response speed is required, it is preferable to make the above-mentioned lower limit value low and the upper limit value low. Furthermore, when a composition that is difficult to produce afterimages is required, it is preferable to make the above-mentioned lower limit value low and the upper limit value low. In addition, when it is desired to increase the dielectric anisotropy in order to keep the driving voltage low, it is preferable to make the above-mentioned lower limit value high and the upper limit value high.

Further, the compound represented by the general formula (M-10) used in the composition is specifically preferably the compound represented by the formula (M-10.1) to the formula (M-10.12), and among them, preferably Contains compounds represented by formula (M-10.5) to formula (M-10.12).

Relative to the total amount of the composition, the lower limit of the preferable content of the compound is 1%, 2%, 4%, 5%, 8%, 10%, 13%, 15%, 18%, 20% . The preferred upper limit of the content is 30%, 28%, 25%, 23%, 20%, 18%, 15%, 13%, 10%, 8%, 5%.

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

(In the formula, X ^M111 ~ X ^M114 each independently represent a fluorine atom or a hydrogen atom, Y ^M111 represents a fluorine atom, a chlorine atom or -OCF ₃ , and R ^M111 represents an alkyl group with 1 to 5 carbon atoms and 2 to carbon atoms. 5 alkenyl or alkoxy with 1 to 4 carbon atoms)

Relative to the total amount of the composition, the lower limit of the preferred content of the compound represented by the general formula (M-11) is 1%, 2%, 4%, 5%, 8%, 10%, 13%, 15%, 18%, 20%. The preferred upper limit of the content is 30%, 28%, 25%, 23%, 20%, 18%, 15%, 13%, 10%, 8%, 5%.

When the viscosity of the composition is kept low and a composition with a fast response speed is required, it is preferable to make the above-mentioned lower limit value low and the upper limit value low. Furthermore, when a composition that is difficult to produce afterimages is required, it is preferable to make the above-mentioned lower limit value low and the upper limit value low. In addition, when it is desired to increase the dielectric anisotropy in order to keep the driving voltage low, it is preferable to make the above-mentioned lower limit value high and the upper limit value high.

Further, the compound represented by the general formula (M-11) used in the composition is specifically preferably the compound represented by the formula (M-11.1) to the formula (M-11.8), and among them, the compound is preferably Contains compounds represented by formula (M-11.1) to formula (M-11.4).

Relative to the total amount of the composition, the lower limit of the preferable content of the compound is 1%, 2%, 4%, 5%, 8%, 10%, 13%, 15%, 18%, 20% . The preferred upper limit of the content is 30%, 28%, 25%, 23%, 20%, 18%, 15%, 13%, 10%, 8%, 5%.

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

(In the formula, X ^M121 and X ^M122 each independently represent a fluorine atom or a hydrogen atom, Y ^M121 represents a fluorine atom, a chlorine atom or -OCF ₃ , and R ^M121 represents an alkyl group with 1 to 5 carbon atoms and 2 to carbon atoms. Alkenyl group 5 or alkoxy group having 1 to 4 carbon atoms, W ^M121 and W ^M122 each independently represent -CH ₂ -or -O-)

Relative to the total amount of the composition, the lower limit of the preferred content of the compound represented by the general formula (M-12) is 1%, 2%, 4%, 5%, 8%, 10%, 13%, 15%, 18%, 20%. The preferred upper limit of the content is 30%, 28%, 25%, 23%, 20%, 18%, 15%, 13%, 10%, 8%, 5%.

When the viscosity of the composition is kept low and a composition with a fast response speed is required, it is preferable to make the above-mentioned lower limit value low and the upper limit value low. Furthermore, when a composition that is difficult to produce afterimages is required, it is preferable to make the above-mentioned lower limit value low and the upper limit value low. In addition, when it is desired to increase the dielectric anisotropy in order to keep the driving voltage low, it is preferable to make the above-mentioned lower limit value high and the upper limit value high.

Further, the compound represented by the general formula (M-12) used in the composition is specifically preferably the compound represented by the formula (M-12.1) to the formula (M-12.12), and among them, the compound is preferably Contains compounds represented by formula (M-12.5) to formula (M-12.8).

Relative to the total amount of the composition, the lower limit of the preferable content of the compound is 1%, 2%, 4%, 5%, 8%, 10%, 13%, 15%, 18%, 20% . The preferred upper limit of the content is 30%, 28%, 25%, 23%, 20%, 18%, 15%, 13%, 10%, 8%, 5%.

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

(In the formula, X ^M131 ~ X ^M134 each independently represent a fluorine atom or a hydrogen atom, Y ^M131 represents a fluorine atom, a chlorine atom or -OCF ₃ , and R ^M131 represents an alkyl group with 1 to 5 carbon atoms and 2 to carbon atoms. alkenyl or 5 carbon atoms of the alkoxy group having 1 to 4, W ^M131 W ^M132 and each independently represents -CH ₂ - or -O-)

Relative to the total amount of the composition, the lower limit of the preferred content of the compound represented by the general formula (M-13) is 1%, 2%, 4%, 5%, 8%, 10%, 13%, 15%, 18%, 20%. The upper limit of the better content is 30%, 28%, 25%, 23%, 20%, 18%, 15%, 13%, 10%, 8%, 5%.

When the viscosity of the composition is kept low and a composition with a fast response speed is required, it is preferable to make the above-mentioned lower limit value low and the upper limit value low. Furthermore, when a composition that is difficult to produce afterimages is required, it is preferable to make the above-mentioned lower limit value low and the upper limit value low. In addition, when it is desired to increase the dielectric anisotropy in order to keep the driving voltage low, it is preferable to make the above-mentioned lower limit value high and the upper limit value high.

Furthermore, the compound represented by the general formula (M-13) used in the composition is specifically preferably the compound represented by the formula (M-13.1) to the formula (M-13.28), and among them, the compound is preferably Contains compounds represented by formulas (M-13.1) to (M-13.4), (M-13.11) to (M-13.14), (M-13.25) to (M-13.28).

Relative to the total amount of the composition, the lower limit of the preferable content of the compound is 1%, 2%, 4%, 5%, 8%, 10%, 13%, 15%, 18%, 20% . The preferred upper limit of the content is 30%, 28%, 25%, 23%, 20%, 18%, 15%, 13%, 10%, 8%, 5%.

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

(In the formula, X ^M141 ~ X ^M144 each independently represent a fluorine atom or a hydrogen atom, Y ^M141 represents a fluorine atom, a chlorine atom or -OCF ₃ , and R ^M141 represents an alkyl group with 1 to 5 carbon atoms and 2 to carbon atoms. 5 alkenyl or alkoxy with 1 to 4 carbon atoms, W ^M141 and W ^M142 each independently represent -CH ₂ -or -O-)

Relative to the total amount of the composition, the lower limit of the preferred content of the compound represented by the general formula (M-14) is 1%, 2%, 4%, 5%, 8%, 10%, 13%, 15%, 18%, 20%. The preferred upper limit of the content is 30%, 28%, 25%, 23%, 20%, 18%, 15%, 13%, 10%, 8%, 5%.

When the viscosity of the composition is kept low and a composition with a fast response speed is required, it is preferable to make the above-mentioned lower limit value low and the upper limit value low. Furthermore, when a composition that is difficult to produce afterimages is required, it is preferable to make the above-mentioned lower limit value low and the upper limit value low. In addition, when it is desired to increase the dielectric anisotropy in order to keep the driving voltage low, it is preferable to make the above-mentioned lower limit value high and the upper limit value high.

Further, the compound represented by the general formula (M-14) used in the composition is specifically preferably the compound represented by the formula (M-14.1) to the formula (M-14.8), and among them, the compound is preferably Contains compounds represented by formula (M-14.5) and formula (M-14.8).

Relative to the total amount of the composition, the lower limit of the preferable content of the compound is 1%, 2%, 4%, 5%, 8%, 10%, 13%, 15%, 18%, 20% . The preferred upper limit of the content is 30%, 28%, 25%, 23%, 20%, 18%, 15%, 13%, 10%, 8%, 5%.

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

(In the formula, X ^M151 and X ^M152 each independently represent a fluorine atom or a hydrogen atom, Y ^M151 represents a fluorine atom, a chlorine atom or -OCF ₃ , and R ^M151 represents an alkyl group with 1 to 5 carbon atoms and 2 to carbon atoms. 5 alkenyl or alkoxy with 1 to 4 carbon atoms, W ^M151 and W ^M152 each independently represent -CH ₂ -or -O-)

Relative to the total amount of the composition, the lower limit of the preferred content of the compound represented by the general formula (M-15) is 1%, 2%, 4%, 5%, 8%, 10%, 13%, 15%, 18%, 20%. The preferred upper limit of the content is 30%, 28%, 25%, 23%, 20%, 18%, 15%, 13%, 10%, 8%, 5%.

When the viscosity of the composition is kept low and a composition with a fast response speed is required, it is preferable to make the above-mentioned lower limit value low and the upper limit value low. Furthermore, when a composition that is difficult to produce afterimages is required, it is preferable to make the above-mentioned lower limit value low and the upper limit value low. In addition, when it is desired to increase the dielectric anisotropy in order to keep the driving voltage low, it is preferable to make the above-mentioned lower limit value high and the upper limit value high.

Further, the compound represented by the general formula (M-15) used in the composition is specifically preferably the compound represented by the formula (M-15.1) to the formula (M-15.14), and among them, preferably Contains compounds represented by formula (M-15.5) to formula (M-15.8), formula (M-15.11) to formula (M-15.14).

Relative to the total amount of the composition, the lower limit of the preferable content of the compound is 1%, 2%, 4%, 5%, 8%, 10%, 13%, 15%, 18%, 20% . The preferred upper limit of the content is 30%, 28%, 25%, 23%, 20%, 18%, 15%, 13%, 10%, 8%, 5%.

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

(In the formula, X ^M161 ~ X ^M164 each independently represent a fluorine atom or a hydrogen atom, Y ^M161 represents a fluorine atom, a chlorine atom or -OCF ₃ , and R ^M161 represents an alkyl group with 1 to 5 carbon atoms and 2 to carbon atoms. 5 alkenyl or alkoxy with 1 to 4 carbon atoms)

Relative to the total amount of the composition, the lower limit of the preferred content of the compound represented by the general formula (M-16) is 1%, 2%, 4%, 5%, 8%, 10%, 13%, 15%, 18%, 20%. The upper limit of the better content is 30%, 28%, 25%, 23%, 20%, 18%, 15%, 13%, 10%, 8%, 5%.

When the viscosity of the composition is kept low and a composition with a fast response speed is required, it is preferable to make the above-mentioned lower limit value low and the upper limit value low. Furthermore, when a composition that is difficult to produce afterimages is required, it is preferable to make the above-mentioned lower limit value low and the upper limit value low. In addition, when it is desired to increase the dielectric anisotropy in order to keep the driving voltage low, it is preferable to make the above-mentioned lower limit value high and the upper limit value high.

Further, the compound represented by the general formula (M-16) used in the composition is specifically preferably the compound represented by the formula (M-16.1) to the formula (M-16.8), and among them, the compound is preferably Contains compounds represented by formula (M-16.1) to formula (M-16.4).

Relative to the total amount of the composition, the lower limit of the preferable content of the compound is 1%, 2%, 4%, 5%, 8%, 10%, 13%, 15%, 18%, 20% . The preferred upper limit of the content is 30%, 28%, 25%, 23%, 20%, 18%, 15%, 13%, 10%, 8%, 5%.

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

(In the formula, X ^M171 ~ X ^M174 each independently represent a fluorine atom or a hydrogen atom, Y ^M171 represents a fluorine atom, a chlorine atom or -OCF ₃ , and R ^M171 represents an alkyl group with 1 to 5 carbon atoms and 2 to carbon atoms. 5 alkenyl or alkoxy with 1 to 4 carbon atoms, W ^M171 and W ^M172 each independently represent -CH ₂ -or -O-)

Relative to the total amount of the composition, the lower limit of the preferred content of the compound represented by the general formula (M-17) is 1%, 2%, 4%, 5%, 8%, 10%, 13%, 15%, 18%, 20%. The preferred upper limit of the content is 30%, 28%, 25%, 23%, 20%, 18%, 15%, 13%, 10%, 8%, 5%.

When the viscosity of the composition is kept low and a composition with a fast response speed is required, it is preferable to make the above-mentioned lower limit value low and the upper limit value low. Furthermore, when a composition that is difficult to produce afterimages is required, it is preferable to make the above-mentioned lower limit value low and the upper limit value low. In addition, when it is desired to increase the dielectric anisotropy in order to keep the driving voltage low, it is preferable to make the above-mentioned lower limit value high and the upper limit value high.

Further, the compound represented by the general formula (M-17) used in the composition is specifically preferably the compound represented by the formula (M-17.1) to the formula (M-17.52), and among them, the compound is preferably It contains compounds represented by formula (M-17.9) to formula (M-17.12), formula (M-17.21) to formula (M-17.28), and formula (M-17.45) to formula (M-17.48).

Relative to the total amount of the composition, the lower limit of the preferable content of the compound is 1%, 2%, 4%, 5%, 8%, 10%, 13%, 15%, 18%, 20% . The preferred upper limit of the content is 30%, 28%, 25%, 23%, 20%, 18%, 15%, 13%, 10%, 8%, 5%.

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

(In the formula, X ^M181 ~ X ^M186 each independently represent a fluorine atom or a hydrogen atom, Y ^M181 represents a fluorine atom, a chlorine atom or -OCF ₃ , and R ^M181 represents an alkyl group with 1 to 5 carbon atoms and 2 to carbon atoms. 5 alkenyl or alkoxy with 1 to 4 carbon atoms)

Relative to the total amount of the composition, the lower limit of the preferred content of the compound represented by the general formula (M-18) is 1%, 2%, 4%, 5%, 8%, 10%, 13%, 15%, 18%, 20%. The upper limit of the better content is 30%, 28%, 25%, 23%, 20%, 18%, 15%, 13%, 10%, 8%, 5%.

When the viscosity of the composition is kept low and a composition with a fast response speed is required, it is preferable to make the above-mentioned lower limit value low and the upper limit value low. Furthermore, when a composition that is difficult to produce afterimages is required, it is preferable to make the above-mentioned lower limit value low and the upper limit value low. In addition, when it is desired to increase the dielectric anisotropy in order to keep the driving voltage low, it is preferable to make the above-mentioned lower limit value high and the upper limit value high.

Further, the compound represented by the general formula (M-18) used in the composition is specifically preferably the compound represented by the formula (M-18.1) to the formula (M-18.12), and among them, preferably Contains compounds represented by formula (M-18.5) to formula (M-18.8).

Relative to the total amount of the composition, the lower limit of the preferable content of the compound is 1%, 2%, 4%, 5%, 8%, 10%, 13%, 15%, 18%, 20% . The preferred upper limit of the content is 30%, 28%, 25%, 23%, 20%, 18%, 15%, 13%, 10%, 8%, 5%.

Furthermore, the compound represented by general formula (M) is preferably, for example, a compound selected from the group represented by general formula (M-19).

(In the formula, R ^M191 represents an alkyl group with 1 to 5 carbon atoms, an alkenyl group with 2 to 5 carbon atoms, or an alkoxy group with 1 to 4 carbon atoms, and Z ^M191 represents a single bond, -CH ₂ CH _2- , -(CH ₂ ) ₄ -, -OCH ₂ -, -CH ₂ O-, -COO-, -OCO- or -C≡C-, X ^M191 to X ^M195 each independently represent a hydrogen atom or a fluorine atom)

Furthermore, the compound represented by general formula (M-19) is specifically preferably a compound represented by formula (M-19.1) to formula (M-19.4), and more preferably a compound represented by formula (M-19.2) . Moreover, it is also preferable to use two or more of the compounds represented by formula (M-19.1) to formula (M-19.4) at the same time.

Furthermore, the compound represented by general formula (M) is preferably, for example, a compound selected from the group represented by general formula (M-20).

(In the formula, R ^M201 represents an alkyl group with 1 to 6 carbon atoms, an alkenyl group with 2 to 6 carbon atoms, or an alkoxy group with 1 to 5 carbon atoms, and X ^M201 to X ^M203 each independently represent a hydrogen atom or Fluorine atom)

Furthermore, the compound represented by general formula (M-20) is specifically preferably a compound represented by formula (M-20.1) to formula (M-20.3). In addition, it is also preferable to use two or more of the compounds represented by formula (M-20.1) to formula (M-20.3) at the same time.

The composition preferably contains one or more compounds represented by the general formula (K). These compounds correspond to compounds with positive dielectric properties (Δε greater than 2).

(In the formula, R ^K1 represents an alkyl group with 1 to 8 carbon atoms, and one or two or more non-adjacent -CH ₂ -s in the alkyl group may be independently replaced by -CH=CH-,- C≡C-, -O-, -CO-, -COO- or -OCO- substitution; n ^K1 represents 0, 1, 2, 3, or 4; A ^K1 and A ^K2 each independently represent a choice from (a)1 , 4-cyclohexylene (in the presence of a group -CH ₂ - adjacent to the two or more of -CH ₂ - may be substituted with -O- or -S-), and (b) 1, 4-phenylene group (1 -CH= or 2 or more non-adjacent -CH= which may be substituted by -N= in the group), the above group (a) And one or more hydrogen atoms on the group (b) may be independently substituted by a cyano group, a fluorine atom or a chlorine atom; Z ^K1 and Z ^K2 each independently represent 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 n ^K1 is 2, When there are 3 or 4 and there are multiple A ^K2s , they can be the same or different. When n ^K1 is 2, 3 or 4 and there are multiple Z ^K1s , they can be the same or different; X ^K1 And X ^K3 each independently represent a hydrogen atom, a chlorine atom or a fluorine atom; X ^K2 represents a hydrogen atom, a fluorine atom, a chlorine atom, a cyano group, a trifluoromethyl group, a fluoromethoxy group, a difluoromethoxy group, and a trifluoromethyl group. Oxy or 2,2,2-trifluoroethyl)

In the general formula (K), R ^{K1 is} preferably an alkyl group with 1 to 8 carbon atoms, an alkoxy group with 1 to 8 carbon atoms, an alkenyl group with 2 to 8 carbon atoms, or an alkenyl group with 2 to 8 carbon atoms. The alkenyloxy group is preferably an alkyl group with 1 to 5 carbon atoms, an alkoxy group with 1 to 5 carbon atoms, an alkenyl group with 2 to 5 carbon atoms, or an alkenyloxy group with 2 to 5 carbon atoms, and more It is preferably an alkyl group with 1 to 5 carbon atoms or an alkenyl group with 2 to 5 carbon atoms, more preferably an alkyl group with 2 to 5 carbon atoms or an alkenyl group with 2 to 3 carbon atoms, particularly preferably a carbon atom Number 3 alkenyl (propenyl).

When reliability is important, R ^{K1 is} preferably an alkyl group, and when viscosity reduction is important, it is preferably an alkenyl group.

烷等飽和環結構之情形時，較佳為直鏈狀之碳原子數1~5之烷基、直鏈狀之碳原子數1~4之烷氧基及直鏈狀之碳原子數2~5之烯基。為了使向列相穩定，較佳為碳原子及存在之情形時之氧原子的合計在5以下，較佳為直鏈狀。 In addition, when the ring structure to which it is bonded is a phenyl group (aromatic), it is preferably a linear alkyl group with 1 to 5 carbon atoms, and a linear alkyl group with 1 to 4 carbon atoms. The oxy group and the alkenyl group with 4~5 carbon atoms are bonded to the ring structure of cyclohexane, pyran and two

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

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

A ^K1 and A ^K2 are independent. When it is required to increase Δn, it is preferably aromatic. In order to improve the response speed, it is preferably aliphatic, preferably representing trans-1,4-cyclohexylene, 1,4-phenylene, 2-fluoro-1,4-phenylene, 3-fluoro-1,4-phenylene, 3,5-difluoro-1,4-phenylene, 2,3 -Difluoro-1,4-phenylene, 1,4-cyclohexenylene, 1,4-bicyclo(2.2.2) octyl, piperidine-1,4-diyl, naphthalene-2, 6-diyl, decahydronaphthalene-2,6-diyl or 1,2,3,4-tetrahydronaphthalene-2,6-diyl, more preferably represents the following structure,

It is more preferable to show the following structure.

Z ^K1 and Z ^K2 each independently represent -CH ₂ O-, -CF ₂ O-, -CH ₂ CH ₂ -, -CF ₂ CF ₂ -or a single bond, more preferably -CF ₂ O-, -CH ₂ CH ₂ -or a single bond, particularly preferably -CF ₂ O- or a single bond.

n ^{K1 is} preferably 0, 1, 2 or 3, preferably 0, 1 or 2. When the focus is on improving the situation of △ε, it is preferably 0 or 1, and when the situation of _{T NI is emphasized, it is more} Preferably, it is 1 or 2.

The types of compounds that can be combined are not particularly limited, and they can be used in combination according to the required properties such as solubility at low temperature, transition temperature, electrical reliability, and birefringence. Regarding the types of compounds used, for example, as an embodiment of the present invention, there are one type, two types, and three types. Furthermore, in another embodiment of this invention, there are 4 types, 5 types, 6 types, and 7 or more types.

In the composition, the content of the compound represented by the general formula (K) must be based on solubility at low temperature, transition temperature, electrical reliability, birefringence, process suitability, dripping traces, residual image, media Adjust the required performance such as electrical anisotropy as appropriate.

Relative to the total amount of the composition, the lower limit of the preferred content of the compound represented by formula (K) is 1%, 10%, 20%, 30%, 40%, 50%, 55%, 60%, 65%, 70%, 75%, 80%. With regard to the preferred upper limit of the content, for example, in one aspect of the present invention, it is 95%, 85%, 75%, 65%, 55%, 45%, 35%, 25% relative to the total amount of the composition. %.

When the viscosity of the composition is kept low and a composition with a fast response speed is required, it is preferable to make the above-mentioned lower limit value low and the upper limit value low. Furthermore, when the T _{NI of} the composition is kept high and a composition with good temperature stability is required, it is preferable to make the above-mentioned lower limit value low and the upper limit value low. Moreover, when it is desired to increase the dielectric anisotropy in order to keep the driving voltage low, it is preferable to make the above-mentioned lower limit value high and the upper limit value high.

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

(In the formula, R ^K11 represents an alkyl group with 1 to 5 carbon atoms, an alkenyl group with 2 to 5 carbon atoms or an alkoxy group with 1 to 4 carbon atoms, and X ^K11 ~X ^K14 each independently represent a hydrogen atom or Fluorine atom, Y ^K11 represents fluorine atom or OCF ₃ )

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

Relative to the total amount of the composition, the lower limit of the preferred content of the compound represented by formula (K-1) is 1%, 2%, 5%, 8%, 10%, 13%, 15%, 18 %, 20%, 22%, 25%, 30%. The preferred upper limit of the content is 30%, 28%, 25%, 23%, 20%, 18%, 15%, 13%, 10%, 8%, 5%.

When the viscosity of the composition is kept low and a composition with a fast response speed is required, it is preferable to make the above-mentioned lower limit value low and the upper limit value low. Furthermore, when the T _{NI of} the composition is kept high and a composition with good temperature stability is required, it is preferable to make the above-mentioned lower limit value low and the upper limit value low. Moreover, when it is desired to increase the dielectric anisotropy in order to keep the driving voltage low, it is preferable to make the above-mentioned lower limit value high and the upper limit value high.

Furthermore, the compound represented by the general formula (K-1) is specifically preferably the compound represented by the formula (K-1.1) to the formula (K-1.4), preferably the formula (K-1.1) or the formula ( The compound represented by K-1.2) is more preferably a compound represented by formula (K-1.2). Moreover, it is also preferable to use the compound represented by formula (K-1.1) or formula (K-1.2) at the same time.

Relative to the total amount of the composition, the lower limit of the preferable content of the compound is 1%, 2%, 4%, 5%, 8%, 10%, 13%, 15%, 18%, 20% . The preferred upper limit of the content is 30%, 28%, 25%, 23%, 20%, 18%, 15%, 13%, 10%, 8%, 5%.

The compound represented by general formula (K) is preferably a compound selected from the group of compounds represented by general formula (K-2), for example.

(In the formula, R ^K21 represents an alkyl group with 1 to 5 carbon atoms, an alkenyl group with 2 to 5 carbon atoms or an alkoxy group with 1 to 4 carbon atoms, and X ^K21 ~X ^K24 each independently represent a hydrogen atom or Fluorine atom, Y ^K21 represents fluorine atom or OCF ₃ )

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

Relative to the total amount of the composition, the lower limit of the preferred content of the compound represented by formula (K-2) is 1%, 2%, 5%, 8%, 10%, 13%, 15%, 18 %, 20%, 22%, 25%, 30%. The preferred upper limit of the content is 30%, 28%, 25%, 23%, 20%, 18%, 15%, 13%, 10%, 8%, 5%.

When the viscosity of the composition is kept low and a composition with a fast response speed is required, it is preferable to make the above-mentioned lower limit value low and the upper limit value low. Furthermore, when the T _{NI of} the composition is kept high and a composition with good temperature stability is required, it is preferable to make the above-mentioned lower limit value low and the upper limit value low. Moreover, when it is desired to increase the dielectric anisotropy in order to keep the driving voltage low, it is preferable to make the above-mentioned lower limit value high and the upper limit value high.

Further, the compound represented by the general formula (K-2) is specifically preferably the compound represented by the formula (K-2.1) to the formula (K-2.6), preferably the formula (K-2.5) or the formula ( The compound represented by K-2.6) is more preferably the compound represented by formula (K-2.6). Moreover, it is also preferable to use the compound represented by formula (K-2.5) or formula (K-2.6) at the same time.

Relative to the total amount of the composition, the lower limit of the preferable content of the compound is 1%, 2%, 4%, 5%, 8%, 10%, 13%, 15%, 18%, 20% . The upper limit of the preferable content is 30%, 28%, 25%, 23%, 20%, 18%, 15%, 13%, 10%, 8%, 5%.

The compound represented by general formula (K) is preferably a compound selected from the group of compounds represented by general formula (K-3), for example.

(In the formula, R ^K31 represents an alkyl group with 1 to 5 carbon atoms, an alkenyl group with 2 to 5 carbon atoms or an alkoxy group with 1 to 4 carbon atoms, and X ^K31 ~X ^K36 each independently represent a hydrogen atom or Fluorine atom, Y ^K31 represents fluorine atom or OCF ₃ )

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

Relative to the total amount of the composition, the lower limit of the preferred content of the compound represented by formula (K-3) is 1%, 2%, 5%, 8%, 10%, 13%, 15%, 18 %, 20%, 22%, 25%, 30%. The preferred upper limit of the content is 30%, 28%, 25%, 23%, 20%, 18%, 15%, 13%, 10%, 8%, 5%.

When the viscosity of the composition is kept low and a composition with a fast response speed is required, it is preferable to make the above-mentioned lower limit value low and the upper limit value low. Furthermore, when the T _{NI of} the composition is kept high and a composition with good temperature stability is required, it is preferable to make the above-mentioned lower limit value low and the upper limit value low. Moreover, when it is desired to increase the dielectric anisotropy in order to keep the driving voltage low, it is preferable to make the above-mentioned lower limit value high and the upper limit value high.

Furthermore, the compound represented by the general formula (K-3) is specifically preferably the compound represented by the formula (K-3.1) to the formula (K-3.4), and more preferably the formula (K-3.1) or the formula ( The compound represented by K-3.2). Moreover, it is also preferable to use the compound represented by formula (K-3.1) and formula (K-3.2) at the same time.

Relative to the total amount of the composition, the lower limit of the preferable content of the compound is 1%, 2%, 4%, 5%, 8%, 10%, 13%, 15%, 18%, 20% . The preferred upper limit of the content is 30%, 28%, 25%, 23%, 20%, 18%, 15%, 13%, 10%, 8%, 5%.

The compound represented by general formula (K) is preferably a compound selected from the group of compounds represented by general formula (K-4), for example.

(In the formula, R ^K41 represents an alkyl group with 1 to 5 carbon atoms, an alkenyl group with 2 to 5 carbon atoms or an alkoxy group with 1 to 4 carbon atoms, and X ^K41 ~X ^K46 each independently represent a hydrogen atom or Fluorine atom, Y ^K41 represents fluorine atom or OCF ₃ , Z ^K41 represents -OCH ₂ -, -CH ₂ O-, -OCF ₂ -or -CF ₂ O-)

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

Relative to the total amount of the composition, the lower limit of the preferred content of the compound represented by formula (K-4) is 1%, 2%, 5%, 8%, 10%, 13%, 15%, 18 %, 20%, 22%, 25%, 30%. The preferred upper limit of the content is 30%, 28%, 25%, 23%, 20%, 18%, 15%, 13%, 10%, 8%, 5%.

When the viscosity of the composition is kept low and a composition with a fast response speed is required, it is preferable to make the above-mentioned lower limit value low and the upper limit value low. Furthermore, when the T _{NI of} the composition is kept high and a composition with good temperature stability is required, it is preferable to make the above-mentioned lower limit value low and the upper limit value low. Moreover, when it is desired to increase the dielectric anisotropy in order to keep the driving voltage low, it is preferable to make the above-mentioned lower limit value high and the upper limit value high.

Furthermore, the compound represented by the general formula (K-4) is specifically preferably the compound represented by the formula (K-4.1) to the formula (K-4.18), and more preferably the formula (K-4.1) and the formula ( K-4.2), compounds represented by formulas (K-4.11) and (K-4.12). Moreover, it is also preferable to use the compounds represented by formula (K-4.1), formula (K-4.2), formula (K-4.11), and (K-4.12) at the same time.

Relative to the total amount of the composition, the lower limit of the preferable content of the compound is 1%, 2%, 4%, 5%, 8%, 10%, 13%, 15%, 18%, 20% . The preferred upper limit of the content is 30%, 28%, 25%, 23%, 20%, 18%, 15%, 13%, 10%, 8%, 5%.

The compound represented by general formula (K) is preferably a compound selected from the group of compounds represented by general formula (K-5), for example.

(In the formula, R ^K51 represents an alkyl group with 1 to 5 carbon atoms, an alkenyl group with 2 to 5 carbon atoms or an alkoxy group with 1 to 4 carbon atoms, and X ^K51 ~X ^K56 each independently represent a hydrogen atom or Fluorine atom, Y ^K51 represents fluorine atom or OCF ₃ , Z ^K51 represents -OCH ₂ -, -CH ₂ O-, -OCF ₂ -or -CF ₂ O-)

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

Relative to the total amount of the composition, the lower limit of the preferred content of the compound represented by formula (K-5) is 1%, 2%, 5%, 8%, 10%, 13%, 15%, 18 %, 20%, 22%, 25%, 30%. The preferred upper limit of the content is 30%, 28%, 25%, 23%, 20%, 18%, 15%, 13%, 10%, 8%, 5%.

When the viscosity of the composition is kept low and a composition with a fast response speed is required, it is preferable to make the above-mentioned lower limit value low and the upper limit value low. Furthermore, when the T _{NI of} the composition is kept high and a composition with good temperature stability is required, it is preferable to make the above-mentioned lower limit value low and the upper limit value low. Moreover, when it is desired to increase the dielectric anisotropy in order to keep the driving voltage low, it is preferable to make the above-mentioned lower limit value high and the upper limit value high.

Furthermore, the compound represented by the general formula (K-5) is specifically preferably the compound represented by the formula (K-5.1) to the formula (K-5.18), and more preferably the compound represented by the formula (K-5.11) to the formula ( The compound represented by K-5.14) is more preferably a compound represented by formula (K-5.12).

Relative to the total amount of the composition, the lower limit of the preferable content of the compound is 1%, 2%, 4%, 5%, 8%, 10%, 13%, 15%, 18%, 20% . The preferred upper limit of the content is 30%, 28%, 25%, 23%, 20%, 18%, 15%, 13%, 10%, 8%, 5%.

The compound represented by general formula (K) is preferably a compound selected from the group of compounds represented by general formula (K-6), for example.

(In the formula, R ^K61 represents an alkyl group with 1 to 5 carbon atoms, an alkenyl group with 2 to 5 carbon atoms or an alkoxy group with 1 to 4 carbon atoms, and X ^K61 ~ X ^K68 each independently represent a hydrogen atom or Fluorine atom, Y ^K61 represents fluorine atom or OCF ₃ , Z ^K61 represents -OCH ₂ -, -CH ₂ O-, -OCF ₂ -or -CF ₂ O-)

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

Relative to the total amount of the composition, the lower limit of the preferred content of the compound represented by formula (K-6) is 1%, 2%, 5%, 8%, 10%, 13%, 15%, 18 %, 20%, 22%, 25%, 30%. The preferred upper limit of the content is 30%, 28%, 25%, 23%, 20%, 18%, 15%, 13%, 10%, 8%, 5%.

When the viscosity of the composition is kept low and a composition with a fast response speed is required, it is preferable to make the above-mentioned lower limit value low and the upper limit value low. Furthermore, when the T _{NI of} the composition is kept high and a composition with good temperature stability is required, it is preferable to make the above-mentioned lower limit value low and the upper limit value low. Moreover, when it is desired to increase the dielectric anisotropy in order to keep the driving voltage low, it is preferable to make the above-mentioned lower limit value high and the upper limit value high.

Further, the compound represented by the general formula (K-6) is specifically preferably the compound represented by the formula (K-6.1) to the formula (K-6.18), and more preferably the formula (K-6.15) to the formula ( The compound represented by K-6.18) is more preferably a compound represented by formula (K-6.16) and formula (K-6.17). In addition, it is also preferable to use the compound represented by the formula (K-6.16) and the formula (K-6.17) at the same time.

Relative to the total amount of the composition, the lower limit of the preferable content of the compound is 1%, 2%, 4%, 5%, 8%, 10%, 13%, 15%, 18%, 20% . The preferred upper limit of the content is 30%, 28%, 25%, 23%, 20%, 18%, 15%, 13%, 10%, 8%, 5%.

The liquid crystal composition preferably contains one or more compounds represented by the general formula (L). The compound represented by the general formula (L) corresponds to a compound whose dielectric property is approximately neutral (Δε value is -2~2).

(In the formula, R ^L1 and R ^L2 each independently represent an alkyl group with 1 to 8 carbon atoms, and one or two or more non-adjacent -CH ₂ -s in the alkyl group may be each independently- CH=CH-, -C≡C-, -O-, -CO-, -COO- or -OCO- substitution; n ^L1 represents 0, 1, 2 or 3; A ^L1 , A ^L2 and A ^L3 are independently selected from the group consisting represents (a) 1,4- cyclohexylene (in the presence of a group -CH ₂ - or two or more of the adjacent -CH ₂ - may be replaced by -O-), (b ) 1,4-phenylene (1 -CH= or 2 or more non-adjacent -CH= in the group can also be substituted by -N=), and (c) naphthalene-2,6 -Diyl, 1,2,3,4-tetrahydronaphthalene-2,6-diyl or decahydronaphthalene-2,6-diyl (exist in naphthalene-2,6-diyl or 1,2,3 ,4-Tetrahydronaphthalene-2,6-diyl in 1 -CH= or 2 or more non-adjacent -CH= can also be replaced by -N=)

In the group consisting of groups, one or more of the hydrogen atoms in the above-mentioned groups (a), group (b) and group (c) can also be independently replaced by cyano, fluorine or chlorine. Atom substitution; Z ^L1 and Z ^L2 each independently represent a single bond, -CH ₂ CH ₂ -, -(CH ₂ ) ₄ -, -OCH ₂ -, -CH ₂ O-, -COO-, -OCO-,- OCF ₂ -, -CF ₂ O-, -CH=NN=CH-, -CH=CH-, -CF=CF- or -C≡C-; where n ^L1 is 2 or 3 and there are multiple A ^L2 In the case, they may be the same or different. When n ^L1 is 2 or 3 and there are multiple Z ^L2s , they may be the same or different; however, they do not include the compound represented by the general formula (J))

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

In the composition, the content of the compound represented by the general formula (L) must be based on solubility at low temperature, transition temperature, electrical reliability, birefringence, process suitability, dripping traces, residual image, media Adjust the required performance such as electrical anisotropy as appropriate.

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

When the viscosity of the composition is kept low and a composition with a fast response speed is required, it is preferable that the above-mentioned lower limit value is high and the upper limit value is high. _{Furthermore, when the T NI} of the composition of the present invention is kept high and a composition with good temperature stability is required, it is preferable that the above-mentioned lower limit is high and the upper limit is high. Moreover, when it is desired to increase the dielectric anisotropy in order to keep the driving voltage low, it is preferable that the above-mentioned lower limit value is low and the upper limit value is low.

When reliability is important, it is preferable that R ^L1 and R ^L2 are both alkyl groups. When it is important to reduce the volatility of the compound, it is preferably an alkoxy group. When it is important to reduce viscosity, Preferably, at least one of them is an alkenyl group.

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

烷等飽和環 結構之情形時，較佳為直鏈狀之碳原子數1~5之烷基、直鏈狀之碳原子數1~4之烷氧基及直鏈狀之碳原子數2~5之烯基。為了使向列相穩定，較佳為碳原子及存在之情形時之氧原子的合計在5以下，較佳為直鏈狀。 Regarding R ^L1 and R ^L2 , when the ring structure to which they are bonded is a phenyl group (aromatic), it is preferably a straight-chain alkyl group with 1 to 5 carbon atoms, and a straight-chain carbon number The alkoxy group of 1~4 and the alkenyl group of 4~5 carbon atoms are bonded to the ring structure of cyclohexane, piperan and two

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

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

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

Regarding A ^L1 , A ^L2 and A ^L3 , when it is required to increase Δn, they are preferably aromatic. In order to improve the response speed, they are preferably aliphatic, and each independently represents trans-1, 4 -Cyclohexyl, 1,4-phenylene, 2-fluoro-1,4-phenylene, 3-fluoro-1,4-phenylene, 3,5-difluoro-1,4-phenylene Base, 1,4-cyclohexenyl, 1,4-bicyclo[2.2.2] octyl, piperidine-1,4-diyl, naphthalene-2,6-diyl, decalin-2 ,6-diyl or 1,2,3,4-tetrahydronaphthalene-2,6-diyl, more preferably represents the following structure,

More preferably, it represents trans-1,4-cyclohexylene or 1,4-phenylene.

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

The compound represented by the general formula (L) preferably has 0 halogen atoms in the molecule or the compound represented by the general formula (L) is preferably selected from the group consisting of the general formulas (L-1)~(L-9) The compound in the indicated compound group.

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

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

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

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

The preferred lower limit of the content is 1%, 2%, 3%, 5%, 7%, 10%, 15%, 20%, 25%, 30%, 35% relative to the total amount of the composition , 40%, 45%, 50%, 55%. The preferred upper limit of the content is 95%, 90%, 85%, 80%, 75%, 70%, 65%, 60%, 55%, 50%, 45% relative to the total amount of the composition. , 40%, 35%, 30%, 25%.

When the viscosity of the composition is kept low and a composition with a fast response speed is required, it is preferable that the above-mentioned lower limit value is high and the upper limit value is high. Furthermore, when the T _{NI of} the composition is kept high and a composition with good temperature stability is required, it is preferable that the above-mentioned lower limit value is medium and the upper limit value is medium. Moreover, when it is desired to increase the dielectric anisotropy in order to keep the driving voltage low, it is preferable that the above-mentioned lower limit value is low and the upper limit value is low.

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

(In the formula, R ^L12 means the same meaning as in the general formula (L-1))

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

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

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

(In the formula, R ^L12 means the same meaning as in the general formula (L-1))

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

Furthermore, the compound represented by the general formula (L-1-2) is preferably a compound selected from the group of compounds represented by the formula (L-1-2.1) to the formula (L-1-2.4), preferably (L-1-2.2) to the compound represented by the formula (L-1-2.4). In particular, in order to improve the response speed of the composition, the compound represented by the formula (L-1-2.2) is particularly preferred. _{In addition, when a higher T NI} is required than the response speed, it is preferable to use the compound represented by the formula (L-1-2.3) or the formula (L-1-2.4). In order to make the solubility at low temperature good, it is not preferable to set the content of the compound represented by formula (L-1-2.3) and formula (L-1-2.4) to 30% or more.

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

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

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

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

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

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

Further, the compound represented by the general formula (L-1-3) is preferably a compound selected from the group of compounds represented by the formula (L-1-3.1) to the formula (L-1-3.12), preferably (L-1-3.1), a compound represented by formula (L-1-3.3) or formula (L-1-3.4). In particular, in order to improve the response speed of the composition, the compound represented by the formula (L-1-3.1) is particularly preferred. _{Moreover, when a higher T NI} is required than the response speed, it is better to use the formula (L-1-3.3), formula (L-1-3.4), formula (L-1-3.11) and formula (L -1-3.12) The compound represented. In order to make the solubility at low temperature good, the total of the compounds represented by formula (L-1-3.3), formula (L-1-3.4), formula (L-1-3.11) and formula (L-1-3.12) A content of 20% or more is not preferable.

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

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

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

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

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

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

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

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

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

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

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

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

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

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

(In the formula, R ^L21 and R ^L22 independently represent the same meaning as ^{R L1} and R ^L2 in the general formula (L))

R ^{L21 is} preferably an alkyl group with 1 to 5 carbon atoms or an alkenyl group with 2 to 5 carbon atoms, and R ^{L22 is} preferably an alkyl group with 1 to 5 carbon atoms, an alkenyl group with 4 to 5 carbon atoms or Alkoxy with 1 to 4 carbon atoms.

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

In the case where the solubility at low temperature is important, the effect is high if the content is set to be large, and on the contrary, when the content is set to be small when the response speed is important, the effect is high. Furthermore, in the case of improving dripping traces or afterimage characteristics, it is preferable to set the range of the content to the middle.

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

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

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

(In the formula, R ^L31 and R ^L32 respectively independently represent the same meaning as ^{R L1} and R ^L2 in the general formula (L))

Preferably, R ^L31 and R ^L32 are each independently an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 4 to 5 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms.

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

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

In the case of obtaining high birefringence, if the content is set to be large, the effect is high. Conversely, in _{the case where high T NI} is emphasized, if the content is set to be small, the effect is high. Furthermore, in the case of improving dripping traces or afterimage characteristics, it is preferable to set the range of the content to the middle.

Further, the compound represented by the general formula (L-3) is preferably a compound selected from the group of compounds represented by the formula (L-3.1) to the formula (L-3.4), and is preferably a compound represented by the formula (L-3.2) to The compound represented by formula (L-3.7).

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

(In the formula, R ^L41 and R ^L42 independently represent the same meaning as ^{R L1} and R ^L2 in the general formula (L))

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

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

In the composition, the content of the compound represented by the general formula (L-4) must be based on solubility at low temperature, transition temperature, electrical reliability, birefringence, process suitability, dripping traces, and afterimages , Dielectric anisotropy and other required performance to adjust appropriately.

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

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

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

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

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

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

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

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

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

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

(In the formula, R ^L51 and R ^L52 independently represent the same meaning as ^{R L1} and R ^L2 in the general formula (L))

R ^{L51 is} preferably an alkyl group with 1 to 5 carbon atoms or an alkenyl group with 2 to 5 carbon atoms, and R ^{L52 is} preferably an alkyl group with 1 to 5 carbon atoms, an alkenyl group with 4 to 5 carbon atoms or Alkoxy with 1 to 4 carbon atoms.

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

In the composition, the content of the compound represented by the general formula (L-5) must be based on solubility at low temperature, transition temperature, electrical reliability, birefringence, process suitability, dripping traces, and residual image , Dielectric anisotropy and other required performance to adjust appropriately.

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

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

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

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

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

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

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

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

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

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

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

Relative to the total amount of the composition, the lower limit of the preferred content of the compound represented by formula (L-6) is 1%, 2%, 3%, 5%, 7%, 10%, 14%, 16 %, 20%, 23%, 26%, 30%, 35%, 40%. Relative to the total amount of the composition, the upper limit of the preferred content of the compound represented by formula (L-6) is 50%, 40%, 35%, 30%, 20%, 15%, 10%, 5 %. When the emphasis is on making Δn larger, it is better to make the content more, and when the emphasis is on precipitation at low temperature, it is better to make the content less.

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

There are no particular restrictions on the types of compounds that can be combined, and it is preferable to contain one to three types from these compounds, and more preferably to contain one to four types. In addition, the selected compound has a wide molecular weight distribution and is also effective for solubility. Therefore, for example, selecting one of the compounds represented by formula (L-6.1) or (L-6.2), selecting formula ( L-6.4) or one of the compounds represented by (L-6.5), select one of the compounds represented by formula (L-6.6) or formula (L-6.7), select one of the compounds represented by formula (L-6.8) One of the compounds represented by) or (L-6.9) is preferably combined appropriately. Among them, it is preferable to contain compounds represented by formula (L-6.1), formula (L-6.3), formula (L-6.4), formula (L-6.6), and formula (L-6.9).

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

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

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

(In the formula, R ^L71 and R ^L72 independently represent the same meaning as ^{R L1} and R ^L2 in general formula (L), ^{and A L71} and A ^{L72 independently represent the same meaning as A L2} and A in general formula (L). ^{L3 has the} same meaning, but ^{the hydrogen atoms on A L71} and A ^L72 can also be independently replaced by fluorine atoms. Z ^L71 has the same meaning as ^{Z L2} in the general formula (L), ^{and X L71} and X ^L72 each independently represent Fluorine atom or hydrogen atom)

In the formula, R ^L71 and R ^{L72 are} preferably each independently an alkyl group with 1 to 5 carbon atoms, an alkenyl group with 2 to 5 carbon atoms, or an alkoxy group with 1 to 4 carbon atoms, A ^L71 and A ^{L72 is} preferably independently 1,4-cyclohexylene or 1,4-phenylene ^{. The hydrogen atoms on A L71} and A ^L72 may be independently substituted by fluorine atoms. Z ^{L71 is} preferably a single bond. Or COO-, preferably a single bond, and X ^L71 and X ^{L72 are} preferably hydrogen atoms.

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

In the composition, the content of the compound represented by the general formula (L-7) must be based on solubility at low temperature, transition temperature, electrical reliability, birefringence, process suitability, dripping traces, and afterimages , Dielectric anisotropy and other required performance to adjust appropriately.

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

When the composition has a high T _NI embodiment, it is preferable to increase the content of the compound represented by formula (L-7), and when the low viscosity embodiment is more ideal, it is preferable To make the content less.

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

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

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

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

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

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

The compound represented by general formula (L-8) is the following compound.

(Wherein, R ^L81 and R ^L82 each independently represents general formula (R) in the same meaning of L ^L1 and R ^L2, A ^L81 represents the general formula (L) is of the same meaning as A ^L1, or a single bond, A ^L81 The above hydrogen atoms can also be independently replaced by fluorine atoms, X ^L81 ~ X ^L86 each independently represent a fluorine atom or a hydrogen atom)

Wherein, R ^L81 and R ^L82 are each independently preferably carbon atoms of an alkyl group having 1 to 5 carbon atoms or an alkenyl group of 2 to 5 carbon atoms, an alkoxy group of 1 to 4, A ^L81 preferred It is 1,4-cyclohexylene or 1,4-phenylene ^{. The hydrogen atoms on A L71} and A ^L72 can also be independently replaced by fluorine atoms. In the same ring structure in the general formula (L-8), The number of fluorine atoms is preferably 0 or 1, and the number of fluorine atoms in the molecule is preferably 0 or 1.

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

In the composition, the content of the compound represented by the general formula (L-8) must be based on solubility at low temperature, transition temperature, electrical reliability, birefringence, process suitability, dripping traces, and afterimages , Dielectric anisotropy and other required performance to adjust appropriately.

Relative to the total amount of the composition, the lower limit of the preferred content of the compound represented by formula (L-8) is 1%, 2%, 3%, 5%, 7%, 10%, 14%, 16 %, 20%. Relative to the total amount of the composition, the upper limit of the preferred content of the compound represented by formula (L-8) is 30%, 25%, 23%, 20%, 18%, 15%, 10%, 5 %.

When the composition is ideal for a high T _NI embodiment, it is better to make the content of the compound represented by formula (L-8) larger, and when a low viscosity embodiment is ideal, the content is Less is better.

Further, the compound represented by the general formula (L-8) is preferably the compound represented by the formula (L-8.1) to the formula (L-8.4), more preferably the formula (L-8.3) and the formula (L-8.5) , Compounds represented by formula (L-8.6), formula (L-8.13), formula (L-8.16) to formula (L-8.18), and formula (L-8.23) to formula (L-8.28).

The compound represented by general formula (L-9) is the following compound.

(Wherein, R ^L91 and R ^L92 each independently represents general formula (R) L in the same meaning as ^L1 and R ^L2)

Preferably, R ^L91 and R ^L92 is each independently an alkyl group having a carbon number of 1 to 5, carbon atoms, an alkenyl group, or a 4 to 5 carbon atoms, an alkoxy group having 1 to 4 of the.

The compound represented by the general formula (L-9) may be used alone or in combination of two or more compounds. The types of compounds that can be combined are not particularly limited, and they can be combined appropriately according to the required properties such as solubility at low temperature, transition temperature, electrical reliability, and birefringence. Regarding the kind of compound used, for example, as an embodiment of the present invention, there are one kind, two kinds, three kinds, four kinds, and five or more kinds.

Relative to the total amount of the composition, the lower limit of the preferred content of the compound represented by formula (L-9) is 1%, 2%, 3%, 5%, 7%, 10%. The preferred upper limit of the content is 20%, 15%, 13%, 10%, 8%, 7%, 6%, 5%, 3% relative to the total amount of the composition.

In the case of obtaining high birefringence, if the content is set to be large, the effect is high. Conversely, in _{the case where high T NI} is emphasized, if the content is set to be small, the effect is high. Furthermore, in the case of improving dripping traces or afterimage characteristics, it is preferable to set the range of the content to the middle.

Furthermore, the compound represented by general formula (L-9) is preferably a compound selected from the group of compounds represented by formula (L-9.1) to formula (L-9.4).

Relative to the total amount of the composition, the lower limit of the total content of the compounds represented by general formula (i), general formula (L) and (J) is 80%, 85%, 88%, 90% , 92%, 93%, 94%, 95%, 96%, 97%, 98%, 99%, 100%. The preferred upper limit of the content is 100%, 99%, 98%, 95%. Among them, from the viewpoint of obtaining a composition having a large absolute value of Δε, it is preferable that any one of the compounds represented by the general formula (J) is 0%.

Relative to the total amount of the composition, the total of the compounds represented by general formula (i), general formula (L-1) to (L-7), and general formula (M-1) to (M-9) is compared The lower limit of the optimum content is 80%, 85%, 88%, 90%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, 99%, 100%. The preferred upper limit of the content is 100%, 99%, 98%, 95%.

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

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

When attaching importance to the stability of UV irradiation, relative to the total mass of the above composition, the content of the compound substituted with chlorine atoms is preferably 15% or less, more preferably 10% or less, and more preferably 8 % Or less, more preferably 5% or less, more preferably 3% or less, and still more preferably substantially no content.

It is preferable to increase the content of compounds in which all the ring structures in the molecule are 6-membered rings. Relative to the total mass of the above composition, it is preferable to set the content of compounds in which all the ring structures in the molecule are all 6-membered rings to be 80% or more , More preferably 90% or more, still more preferably 95% or more, and most preferably only a compound in which all the intramolecular ring structures are 6-membered rings constitute the composition.

In order to suppress the deterioration of the composition due to oxidation, it is preferable to reduce the content of the compound having a cyclohexenylene group as a ring structure, and relative to the total mass of the above composition, it is preferable to reduce the content of the compound having a cyclohexenylene group It is 10% or less, preferably 8% or less, more preferably 5% or less, preferably 3% or less, and still more preferably substantially no content.

When focusing on improving the viscosity and improving the T _NI , it is better to reduce the content of the following compounds, namely: 2-methylbenzene-1,4-bis which has hydrogen atoms in the molecule and can be substituted into halogens Based on the total mass of the above composition, it is preferable to set the content of the compound having a 2-toluene-1,4-diyl group in the molecule to 10% or less, preferably 8% or less, more preferably 5% or less, preferably 3% or less, and still more preferably substantially no content.

In this case, the term "substantially not contained" means that it does not contain anything other than what is not intentionally contained.

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

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

(Polymerizable compound with mesogen)

The polymerizable compound with mesogen of the present invention is represented by the following general formula (i)

Said.

In the general formula (i), P ⁱ¹ represents a polymerizable functional group, and specific examples of the polymerizable functional group include groups represented by the following formulas (P-1) to (P-15).

Among them, P ^{i1 is} preferably (P-1), (P-2) or (P-3).

Sp ^{i1 is} preferably a single bond or one or two or more non-adjacent -CH ₂ -alkylene groups with 1 to 15 carbons which can also be substituted by -O-, more preferably a single bond or 1 to carbons 10 of the alkylene group.

R ⁱ¹ preferably represents -Sp ⁱ¹ -P ⁱ¹ , a hydrogen atom, an alkyl group having 1 to 8 carbon atoms in which the hydrogen atom may be substituted by a halogen atom, and a carbon atom number of 1 to 8 in which the hydrogen atom may be substituted by a halogen atom的alkoxy。 From the viewpoint that the polymerizable compound can easily form a polymer network, R ⁱ¹ preferably represents -Sp ⁱ¹ -P ⁱ¹ , and more preferably represents the same as the other -Sp ⁱ¹ -P ^{i1 in the general formula (i)}的基。 The base.

A ⁱ¹ , A ⁱ² and A ⁱ³ are each independently selected from, (a) trans-1,4-cyclohexylene, (b) phenylene (the hydrogen atoms contained in this group are independently unsubstituted , Or the hydrogen atom may be replaced by fluorine atom, chlorine atom, alkyl group with 1 to 8 carbon atoms, halogenated alkyl group with 1 to 8 carbon atoms, halogenated alkoxy group with 1 to 8 carbon atoms, 1~8 alkoxy or -Sp ⁱ¹ -P ⁱ¹ substitution), and (c) a group consisting of cyclohexenyl, naphthyl, decahydronaphthyl and tetrahydronaphthyl, more preferably Represents selected from (b) phenylene (the hydrogen atoms contained in this group are independently unsubstituted, or the hydrogen atoms contained in these groups can also be replaced by fluorine atoms, chlorine atoms, and carbon atoms of 1-8 Alkyl substituted), and (c) naphthyl groups, more preferably hydrogen atoms are independently unsubstituted or the hydrogen atoms contained in these groups may also be fluorine atoms, chlorine atoms, A phenylene substituted with an alkyl group with 1 to 8 carbon atoms.

From the viewpoint of forming a stable mesogen, it is preferable that Z ⁱ¹ and Z ⁱ² each independently represent a single bond, -O-, -OCH ₂ -, -CH ₂ O-, -CO-, -C ₂ H ₄ -, -COO-, -OCO-, -OCOOCH ₂ -, -CH ₂ OCOO-, -CO-, -CH=CH-COO-, -OOC-CH=CH-, -COOC ₂ H ₄ -,- OCOC ₂ H ₄ -, -C ₂ H ₄ OCO-, -C ₂ H ₄ COO-, -OCOCH ₂ -, -CH ₂ COO-, -CH=CH-, -CF=CH-, -CH=CF- , -CF ₂ -, -CF ₂ O-, -OCF ₂ -, -CF ₂ CH ₂ -, -CH ₂ CF ₂ -or -CF ₂ CF ₂ -, more preferably represents a single bond, -O-,- OCH ₂ -, -CH ₂ O-, -CO-, -C ₂ H ₄ -, -COO-, -OCO-, -OCOOCH ₂ -, -CH ₂ OCOO-, -CO-, -COOC ₂ H _4- , -OCOC ₂ H ₄ -, -C ₂ H ₄ OCO-, -C ₂ H ₄ COO-, -OCOCH ₂ -or -CH ₂ COO-, and more preferably represents a single bond, -OCH ₂ -, -CH ₂ O-, -C ₂ H ₄ -, -COO- or -OCO-.

From the viewpoint of having appropriate polymerization reactivity, the compound represented by the general formula (i) preferably contains two or more and four or less -Sp ^i1- P ⁱ¹ groups.

The polymerizable compound represented by the general formula (i) has a mesogen group. Since the polymerizable compound of the present invention contains a mesogenic group, when added to a liquid crystal composition, it exhibits good liquid crystal alignment. Among them, the compound represented by the general formula (i) may not independently exhibit liquid crystal alignment.

Here, the mesogen is a structural unit represented by ^{A i1} -Z ⁱ¹ -(A ⁱ² -Z ⁱ² )n ⁱ -A ^{i3 in the general formula (i).}

As the mesogenic group, from the viewpoint of easily expressing liquid crystallinity, it is preferably a skeleton formed by directly bonding two or more ring structures, more preferably a group containing a bisphenol skeleton or a triphenyl skeleton, and still more preferably It is a bisphenol skeleton.

Specifically, the polymerizable compound represented by the general formula (i) is preferably a compound represented by the following general formulas (i-1) to (i-7).

P ⁱ¹¹ -Sp ⁱ¹¹ -A ⁱ¹¹ -A ⁱ¹² -COO-A ⁱ¹³ -Sp ⁱ¹² -P ⁱ¹² (i-1)

P ⁱ²¹ -Sp ⁱ²¹ -A ⁱ²¹ -A ⁱ²² -OCO-A ⁱ²³ -Sp ⁱ²² -P ⁱ²² (i-2)

P ⁱ³¹ -Sp ⁱ³¹ -A ⁱ³¹ -A ⁱ³² -CH=CHCOO-A ⁱ³³ -Sp ⁱ³² -P ⁱ³² (i-3)

P ⁱ⁴¹ -Sp ⁱ⁴¹ -A ⁱ⁴¹ -A ⁱ⁴² -OCOCH=CH-A ⁱ⁴³ -Sp ⁱ⁴² -P ⁱ⁴² (i-4)

^{P i51 -Sp i51 -A i51 -A i52} -CH 2 CH 2 COO-A i53 -Sp i52 -P i52 (i-5)

P ⁱ⁶¹ -Sp ⁱ⁶¹ -A ⁱ⁶¹ -A ⁱ⁶² -OCOCH ₂ CH ₂ -A ⁱ⁶³ -Sp ⁱ⁶² -P ⁱ⁶² (i-6)

P ⁱ⁷¹ -Sp ⁱ⁷¹ -A ⁱ⁷¹ -A ⁱ⁷² -Sp ⁱ⁷² -P ⁱ⁷² (i-7)

^{(Wherein, P i11, P i12, P} i21, P i22, P i31, P i32, P i41, P i42, P i51, P i52, P i61, P i62, P i71 and ^P i72 each independently represent The base represented by (P-1), (P-2) or (P-3) above, Sp ⁱ¹¹ , Sp ⁱ¹² , Sp ⁱ²¹ , Sp ⁱ²² , Sp ⁱ³¹ , Sp ⁱ³² , Sp ⁱ⁴¹ , Sp ⁱ⁴² , Sp ⁱ⁵¹ , Sp ⁱ⁵² , Sp ⁱ⁶¹ , Sp ⁱ⁶² , Sp ⁱ⁷¹ and Sp ⁱ⁷² each independently represent a single bond or one or more than two non-adjacent -CH ₂ -which can also be substituted by -O- with a carbon number of 1 to 15 ^{alkyl, A i11, A i12, A} i13, A i21, A i22, A i23, A i31, A i32, A i33, A i41, A i42, A i43, A i51, A i52, A i53, A i61 , A ⁱ⁶² , A ⁱ⁶³ , A ⁱ⁷¹ and A ⁱ⁷² are each independently selected from (a) trans-1,4-cyclohexylene, (b) phenylene (the hydrogen atoms contained in this group are independently of each other Unsubstituted, or the hydrogen atom may be fluorine atom, chlorine atom, C1-C8 alkyl group, C1-C8 halogenated alkyl group, C1-C8 halogenated alkoxy group, Alkoxy with 1 to 8 carbon atoms or -Sp ⁱ¹ -P ⁱ¹ substitution), and (c) the group consisting of cyclohexenyl, naphthyl, decahydronaphthyl and tetrahydronaphthyl)

The polymerizable compound represented by the general formula (i) is one that is activated by polymerization by irradiating ultraviolet rays. Thereby, the polymerizable compounds represented by the general formula (i) are polymerized with each other to form a polymer. As the polymerization method, radical polymerization, anionic polymerization, cationic polymerization, etc. can be used, and the polymerization is preferably carried out by radical polymerization, more preferably radical polymerization by photo-Friesian rearrangement, and initiation by photopolymerization. Free radical polymerization of agents.

As the radical polymerization initiator, a thermal polymerization initiator or a photopolymerization initiator can be used, and a photopolymerization initiator is preferred.

(Composite liquid crystal composition)

The phase-separated liquid crystal layer of the present invention can be formed using a composite liquid crystal composition containing the above-mentioned liquid crystal composition and a polymerizable compound represented by the general formula (i).

The composite liquid crystal composition is preferably composed of a stable liquid crystal phase at least in a specific temperature range, and is preferably a liquid crystal phase at room temperature.

From the viewpoint of obtaining high-speed response of the obtained liquid crystal element, it is preferable that the lower limit of the content of the polymerizable compound represented by the general formula (i) in 100% by mass of the composite liquid crystal composition is 2% by mass or more , More preferably 4% by mass or more, still more preferably 6% by mass or more, and particularly preferably 8% by mass or more. From the viewpoint of lowering the driving voltage of the obtained liquid crystal element, the upper limit value is preferably 20 % By mass or less, more preferably 18% by mass or less, still more preferably 16% by mass or less, particularly preferably 14% by mass or less.

The composite liquid crystal composition may contain other arbitrary components without hindering the purpose of the present invention.

As the above-mentioned optional component, for example, a radical polymerization initiator, a chain polymerizable compound represented by the general formula (ii) described later, and the like can be cited.

(Phase separation liquid crystal layer)

In a state where the composite liquid crystal composition exhibits a liquid crystal phase, by polymerizing the polymerizable compound in the composite liquid crystal composition, a phase-separated liquid crystal layer can be formed. At this time, it is preferable to gradually phase separate the liquid crystal composition and the polymer by the progress of the polymerization reaction. In the phase-separated liquid crystal layer obtained in this way, the polymer forms a dense polymer network in the phase, and can exert a high alignment control force on the liquid crystal molecules in the phase.

Regarding the reaction rate during the polymerization, in the ultraviolet polymerization, it is only necessary to appropriately adjust it according to the type and content of the functional group of the polymerizable compound or the photoinitiator, and the exposure intensity of ultraviolet rays. From the viewpoint of obtaining a sufficient reaction rate, the exposure intensity of ultraviolet rays is preferably at least 2 mW/cm ² or more.

If the content of the polymerizable compound in the composite liquid crystal composition increases, phase separation may occur in the composition. In this case, it is preferable to adopt a temperature condition where the composite liquid crystal composition becomes a homogeneous phase at least at the beginning of the polymerization.

The ultraviolet curing of the polymerizable compound in the composite liquid crystal composition is preferably carried out in a state where the composite liquid crystal composition is sandwiched by the hollow element described later. Thereby, the liquid crystal element can be produced efficiently.

(Orientation polymer)

The polymer in the phase-separated liquid crystal layer contains mesogen groups derived from the polymerizable compound represented by the general formula (i). Here, the mesogen group contained in the alignment polymer has a certain alignment. In this specification, polymers containing mesogen groups in such an alignment state are referred to as alignment polymers.

The degree of alignment of the above mesogen group is not particularly limited, but it is preferably a degree to which the aligning polymer exhibits a certain degree of refractive index anisotropy.

The alignment polymer in the liquid crystal element of the present invention is obtained by curing the above-mentioned composite liquid crystal composition under the alignment control force of a homogeneous alignment film. Therefore, in the liquid crystal element of the present invention, the liquid crystal molecules and the mesogen group in the aligning polymer are homogeneously aligned in the same direction.

The alignment polymer may be a single polymer composed of only one type of monomer unit derived from the polymerizable compound represented by the general formula (i), or may contain two or more types derived from the general formula (i) ) Is a copolymer of a monomer unit of a polymerizable compound. Furthermore, the aligning polymer may be one containing a monomer unit derived from a polymerizable compound other than the polymerizable compound represented by the general formula (i). When the aligning polymer contains a monomer unit derived from a polymerizable compound other than the polymerizable compound represented by the general formula (i), from the viewpoint of expressing high refractive index anisotropy, the source The content of the monomer unit derived from the polymerizable compound represented by the general formula (i) is preferably 30% by weight or more, more preferably 40% by weight or more, still more preferably 50% by weight or more, particularly preferably 60% by weight %the above.

(Chain polymer compound)

The above-mentioned aligning polymer is preferably a polymer obtained by curing a polymerizable compound represented by the general formula (i) and one or two or more chain polymerizable compounds represented by the following general formula (ii) with ultraviolet rays. Polymers and/or polymer mixtures.

(In the formula, P ⁱⁱ¹ represents a polymerizable functional group, R ⁱⁱ¹ represents a single bond or an alkylene group with 1 to 9 carbon atoms. One or two or more -CH ₂ -in the alkylene group may also be free of oxygen atoms. Directly adjacent methods are independently substituted by -O-, -CO-, -COO- or -OCO-, and one or two or more hydrogen atoms present in the alkylene group can also be independently replaced by fluorine atoms. Substitution, R ⁱⁱ² and R ⁱⁱ³ each independently represent a hydrogen atom or an alkyl group with 1 to 21 carbon atoms, and one or two or more of -CH ₂ -in the alkyl group may also be in a manner that the oxygen atoms are not directly adjacent to each other. Independently substituted by -O-, -CO-, -COO- or -OCO-, one or more of the hydrogen atoms present in the alkyl group may also be independently replaced by P ⁱⁱ² , fluorine atom, and carbon atom number Substitution of 1~8 alkyl group and C1~8 halogenated alkyl group, when there are multiple P ⁱⁱ¹ , they can be the same or different respectively)

The above-mentioned copolymer contains both a monomer unit derived from a polymerizable compound represented by the general formula (i) and a monomer unit derived from a chain polymerizable compound. From the viewpoint of reducing the driving voltage of the obtained liquid crystal element, the alignment polymer preferably contains the above-mentioned copolymer.

The copolymer and/or polymer mixture can be easily obtained by curing the polymerizable composition containing the chain polymerizable compound with ultraviolet rays. From this viewpoint, the polymerizable composition preferably contains a chain polymerizable compound. In addition, by using the polymerizable compound represented by the general formula (i) and the chain polymerizable compound in combination, the polymerization reaction rate of the polymerizable composition can be increased. Furthermore, the above-mentioned polymerizable composition may contain a chain polymerizable compound other than the chain polymerizable compound represented by general formula (ii).

In the general formula (ii), P ⁱⁱ¹ represents a polymerizable functional group, and as a specific example, the same groups as the ^{above P i1 can be cited.} Among them, P ^{ii1 is} preferably (P-1), (P-2) or (P-3).

R ^{ii1 is} preferably an alkylene group having 1 to 6 carbon atoms, more preferably an alkylene group having 1 to 3 carbon atoms.

R ⁱⁱ² and R ^{ii3 are} preferably each independently a hydrogen atom or one or more non-adjacent -CH ₂ -may be substituted by -O-, one or more hydrogen atoms may also be independently is the number of P ⁱⁱ² substituted alkyl group having 1 to 21 carbon atoms, the more preferably one or two or more of the hydrogen atoms each independently may be substituted with P ⁱⁱ² the carbon atoms of the alkyl group having 3 to 16, and still more preferably One or two or more hydrogen atoms may be independently ^{substituted by P ii2} for an alkyl group having 5 to 11 carbon atoms, and particularly preferably an alkyl group having 5 to 11 carbon atoms.

Regarding the total number of carbon atoms contained in each of R ⁱⁱ¹ , R ⁱⁱ² and R ⁱⁱ³ , it is preferably 3 to 30, more preferably 4 to 28, still more preferably 5 to 26, and still more preferably 6 to 24, Particularly preferred is 7-22.

In addition, the above-mentioned aligning polymer is preferably obtained by UV curing the polymerizable compound represented by the general formula (i) and one or more of the chain polymerizable compounds represented by the following general formula (iii) The copolymer and/or polymer mixture.

(In the formula, P ⁱⁱⁱ¹ and P ⁱⁱⁱ² each independently represent (P-1), (P-2) or (P-3), R ⁱⁱⁱ¹ represents an alkylene group with 1 to 6 ^{carbon atoms, and R iii2} represents a carbon atom An alkylene group of 1 to 4, R ⁱⁱⁱ³ represents a hydrogen atom or an alkyl group of 1 to 3 carbon atoms, n ⁱⁱⁱ¹ represents an integer of 1 to 15)

In the general formula (iii), n ⁱⁱ¹¹ preferably represents an integer from 2 to 12, more preferably represents an integer from 3 to 10, and even more preferably represents an integer from 4 to 8. In the present invention, when the polymerizable compound represented by the general formula (iii) is used, a polymerizable compound in which n ⁱⁱ¹¹ in the general formula (iii) represents an integer of 16 or more may also be used in combination. In this case, it is preferable to ^{adjust the average value of all n ii11} of these compounds to the range of 3-10 to use.

(Liquid crystal element)

The liquid crystal element of the present invention includes a phase-separated liquid crystal layer, a homogeneous alignment film, and electrodes.

The specific embodiment of the liquid crystal element of the present invention is not particularly limited as long as it has the above-mentioned requirements. For example, it may be formed in a hollow structure composed of at least two transparent substrates with electrodes and a homogeneous alignment film. The element holds a phase-separated liquid crystal layer.

The liquid crystal element of the present invention is one that maintains the homogeneous alignment of the phase-separated liquid crystal layer in a non-power state. Therefore, it can be used as a so-called element that can be driven in the reverse mode. That is, the liquid crystal element can be in a transmissive state when no voltage is applied, and can be in a non-transmissive state when a voltage is applied.

In the liquid crystal element of the present invention, the alignment of the liquid crystal molecules is not only controlled by the homogeneous alignment film, but also by the tight polymer network composed of the alignment polymer. Therefore, the liquid crystal element of the present invention is difficult to cause alignment disorder caused by external stress, and has high stress resistance. Since the liquid crystal element of the present invention is unlikely to cause display failure even under an environment where bending stress is applied, it can be formed to be flexible. Therefore, the liquid crystal element of the present invention may also have a partial surface of the element surface.

(Homogeneous alignment film)

The homogeneous alignment film only needs to have the function of inducing a homogeneous alignment by directly contacting the composite liquid crystal composition or the phase-separated liquid crystal layer. As such an alignment film, a known one may be used. Generally, a pair of homogeneous alignment films are arranged to pinch the liquid crystal phase. In a hollow element, a homogeneous alignment film is usually arranged on the surface of each of a pair of substrates facing each other.

As said alignment film, a polyimide alignment film, a photo-alignment film, etc. are mentioned, for example. As a method of forming an alignment film, for example, in the case of a polyimide alignment film, the following method can be cited, that is, the polyimide resin composition is coated on a transparent substrate and thermally cured at a temperature of 180°C or higher , Further use cotton cloth or rayon cloth for rubbing treatment. In addition, polymer films such as polyimide films that have not been rubbed can also be used.

(Electrode)

Regarding the electrodes, in the liquid crystal element of the present invention, they are arranged in such a way that the electric field of the liquid crystal molecules in the phase-separated liquid crystal layer can be aligned and controlled. The intensity of the electric field is controlled by the degree of voltage applied to the electrode.

The shape of the electrode is not particularly limited, and the conductive portion may have a stripe shape or a mesh shape, or a random mesh shape. The electrode is preferably a so-called fishbone structure.

(Transparent substrate)

As the material of the above-mentioned transparent substrate, glass, plastic, etc. can be used. From the viewpoint of applying the liquid crystal element of the present invention to a flexible display, the transparent substrate is preferably flexible.

(Example of manufacturing liquid crystal element)

From the viewpoint of productivity, the liquid crystal element of the present invention is preferably produced by a polymerizable liquid crystal element in which a composite liquid crystal composition is sandwiched between a hollow element. In the polymerizable liquid crystal element, the liquid crystal compound or the polymerizable compound with mesogen group in the composite liquid crystal composition is in a homogeneous alignment state under the influence of the alignment control force of the homogeneous alignment film. In this alignment state, the polymerizable compound in the composite liquid crystal composition is cured by ultraviolet rays using the above-mentioned method to form a phase-separated liquid crystal layer from the composite liquid crystal composition, thereby obtaining a liquid crystal element.

Regarding the method of sandwiching the composite liquid crystal composition in the hollow element, a normal method can be used, and a vacuum injection method, an ODF method, or the like can also be used. In the polymerizable liquid crystal element manufacturing step of the ODF method, the following method can be used to manufacture the polymerizable liquid crystal element, namely: use a dispenser to heat the epoxy system and use a curing sealant on the back plane or front plane of the hollow element. A closed ring-shaped embankment is drawn on the substrate on either side, a specific amount of the composite liquid crystal composition is dropped into it under degassing, and then the front plane and the back plane are joined. The composite liquid crystal composition used in the present invention has high phase stability and is difficult to volatilize, so it can be preferably used in the ODF step.

Hereinafter, the preferred embodiments of the liquid crystal element of the present invention will be described using the drawings, but the present invention is not limited by them.

(Vertical electric field type)

The vertical electric field type liquid crystal element is a liquid crystal element in which electrodes are arranged to generate an electric field perpendicular to the homogeneous alignment film. In a vertical electric field type liquid crystal element, electrodes are usually provided on both sides of two transparent substrates sandwiching a phase-separated liquid crystal layer. Regarding the vertical electric field type liquid crystal element, as the driving mode, for example, a driving mode such as TN, STN, ECB, VA, VA-TN, OCB, etc. can be adopted.

FIG. 1 is a diagram schematically showing the structure of a vertical electric field type liquid crystal element when no voltage is applied. Hereinafter, referring to FIG. 1, the vertical electric field type liquid crystal element of the present invention will be described.

The structure of the vertical electric field type liquid crystal element of the present invention is as described in FIG. 1, and is the following liquid crystal element, namely: having a first substrate 11 and a second substrate 12, and being sandwiched between the first substrate 11 and the second substrate 11 The phase-separated liquid crystal layer between the substrates 12, the first substrate 11 and the second substrate 12 are respectively provided with a transparent electrode (layer) 2 composed of a transparent conductive material, the liquid crystal molecules in the phase-separated liquid crystal layer when no voltage is applied The alignment is approximately parallel to the homogeneous alignment film 3. The phase-separated liquid crystal layer is composed of liquid crystal molecules 4 and alignment polymers 5 contained in the liquid crystal composition. In addition, in FIG. 1, although the alignment polymer 5 is shown in the form of a large number of polymerizable compounds fixed for convenience of explanation, in fact, it forms a polymer in which the polymerizable compounds are complicatedly connected to each other. network. Furthermore, a pair of homogeneous alignment films 3 are formed on the surface of the transparent electrode (layer) 2 so as to directly contact the phase-separated liquid crystal layer.

That is, the vertical electric field type liquid crystal element of the present invention has a first substrate 11, an electrode 2, a homogeneous alignment film 3, a phase-separated liquid crystal layer containing liquid crystal molecules 4 and an alignment polymer 5, a homogeneous alignment film 3, The structure of the electrode 2 and the second substrate 12.

Fig. 2 is a diagram schematically showing the structure of a vertical electric field type element when a voltage is applied.

By applying a voltage to the electrodes, the vertical electric field type liquid crystal element will transition from the state of FIG. 1 to the state of FIG. 2. At this time, the liquid crystal molecules 4 are aligned in a direction perpendicular to the homogeneous alignment film due to the generation of the vertical electric field. The vertical electric field type liquid crystal element shown in FIG. 2 is formed into a vertical electric field type liquid crystal element due to the different alignment directions of the liquid crystal molecules 4 and the alignment polymer 5 in the phase-separated liquid crystal layer, and light scattering occurs at the interface of each component. Become an opaque state.

In this way, the vertical electric field type liquid crystal element of the present invention changes the light penetration state due to the presence or absence of applied voltage, so it can be used as a liquid crystal dimming element used in a device that requires a dimming function, or a display for image display The liquid crystal display element used in. In particular, since the vertical electric field type liquid crystal element of the present invention can be driven in the reverse mode, it is particularly suitable for applications that require power saving performance, or transmittance during power failure or without power supply.

The vertical electric field type liquid crystal dimming element of the present invention is preferably used in building materials, dimming glass, smart windows corresponding to cars, or dimming units in OLED displays. The vertical electric field type liquid crystal display element of the present invention can be used for the same purposes as the conventional polymer dispersion type liquid crystal display element, and in particular can be preferably used for transmissive displays, flexible displays, and the like.

(Horizontal electric field type)

The lateral electric field type liquid crystal element is a liquid crystal element in which electrodes are arranged to generate an electric field in parallel with the homogeneous alignment film. In a vertical electric field type liquid crystal element, an electrode is usually provided on one of two transparent substrates sandwiching a phase-separated liquid crystal layer. Regarding the lateral electric field type liquid crystal element, as the driving mode, for example, a driving mode such as IPS or FFS can be adopted. As shown in Fig. 5 described later, in the transverse electric field type liquid crystal element, when no voltage is applied, the alignment direction of the liquid crystal molecules or the direction of the alignment control force in the homogeneous alignment film is at a certain angle to the extending direction (length direction) of the electrode . From the standpoint of obtaining a good display comparison, the lower limit of this angle is preferably 30 degrees or more, more preferably 40 degrees or more, still more preferably 50 degrees or more, particularly preferably 60 degrees or more, and the upper limit is more The best is less than 90.

FIG. 3 is a diagram schematically showing the structure of a lateral electric field type liquid crystal element when no voltage is applied. Hereinafter, referring to FIG. 3, the transverse electric field type liquid crystal element of the present invention will be described.

The structure of the transverse electric field type liquid crystal element of the present invention is as described in FIG. 3, which is a liquid crystal element having a first substrate 11 and a second substrate 12, and sandwiched between the first substrate 11 and the second substrate. The phase-separated liquid crystal layer between the substrates 12, the first substrate 11 and the second substrate 12 are respectively provided with a transparent electrode (layer) 2 composed of a transparent conductive material, the liquid crystal molecules in the phase-separated liquid crystal layer when no voltage is applied The alignment is approximately parallel to the homogeneous alignment film 3. The phase-separated liquid crystal layer is composed of liquid crystal molecules 4 and alignment polymers 5 contained in the liquid crystal composition. Furthermore, in FIG. 3, although the alignment polymer 5 is shown in the form of a large number of polymerizable compounds fixed for the convenience of description, in fact, it forms a polymer in which the polymerizable compounds are complicatedly connected to each other. network. Furthermore, a pair of homogeneous alignment films 3 are formed on the surface of the transparent electrode (layer) 2 so as to be in direct contact with the phase-separated liquid crystal layer. Furthermore, a polarizing plate 6 is arranged on the outer side of the substrate 11 and the substrate 12 constituting each of the liquid crystal elements.

That is, the transverse electric field type liquid crystal element of the present invention is a layered liquid crystal layer including a polarizing plate 6, a first substrate 11, an electrode 2, a homogeneous alignment film 3, a phase-separated liquid crystal layer containing liquid crystal molecules 4 and an alignment polymer 5, and a homogeneous The configuration of the alignment film 3, the electrode 2, the second substrate 12, and the polarizing plate 6.

FIG. 4 is a diagram schematically showing the structure of a transverse electric field type element when a voltage is applied.

By applying a voltage to the electrodes, the lateral electric field type liquid crystal element will transition from the state of FIG. 3 to the state of FIG. 4. Here, in order to make the alignment migration of the liquid crystal molecules 4 clear, Fig. 5 and Fig. 6 are shown in a direction perpendicular to the surface of the homogeneous alignment film. Figs. 3 and 4 are shown. At this time, due to the generation of the transverse electric field, the alignment of the liquid crystal molecules 4 shifts from a state parallel to the direction of the alignment control force of the homogeneous alignment film (Figure 5) to a non-parallel state with respect to the direction of the alignment control force of the homogeneous alignment film Status (Figure 6). As described above, the phase of the polarized light incident through the polarizing plate 6 can be changed by the transition of the alignment state of the liquid crystal molecules 4.

In this way, the transverse electric field type liquid crystal element of the present invention changes the phase of the polarized light by the presence or absence of applied voltage, so by combining the element, a polarizing plate, and a retardation plate (not shown), etc., it can be used as a The liquid crystal display element of the display for image display. At this time, the transverse electric field type liquid crystal element of the present invention can be driven in either the forward mode or the reverse mode by the arrangement of the polarizing plate or the phase difference plate.

The lateral electric field type liquid crystal display element of the present invention can be used for the same purposes as the conventional polymer dispersion type liquid crystal display element, and in particular can also be preferably used for transmissive displays, flexible displays, and the like.

(Other electric field type)

In the liquid crystal element of the present invention, other electric field types that are not clearly classified into any of the above-mentioned vertical electric field type and lateral electric field type may also be used. As such an electric field type, the fringe electric field used in the FFS drive mode, etc. can be cited.

[Example]

Examples are listed below to illustrate the present invention in more detail, but the present invention is not limited to these examples. In addition, the "%" in the composition of the following examples and comparative examples means "mass %".

The detailed description of each evaluation characteristic in each Example and Comparative Example is as follows.

T _ni : Nematic phase-isotropic liquid phase transition temperature (℃)

△n: Refractive index anisotropy at 298K

△ε: Dielectric anisotropy at 298K

T ₀ : The light transmittance [%] when the applied voltage is zero, indicating the size of the scattering, the smaller the value, the greater the scattering.

T ₁₀₀ : The light transmittance when the light transmittance becomes almost unchanged as the applied voltage increases [%]

V ₁₀ : When T _{0 is} set to 0% and T _{100 is} set to 100%, the applied voltage when the light transmittance becomes 10% [V]

V ₉₀ : Same as above, the applied voltage when the light transmittance becomes 90% [V]

Contrast ratio: T ₀ /T ₁₀₀ , or T ₁₀₀ /T ₀

In addition, the content of each component of the polymerizable compound in Table 1 is a value relative to the total amount of polymerizable monomers (100% by mass in total). In addition, the content of each component of each liquid crystal compound in the liquid crystal composition in Table 2 is a value relative to the total liquid crystal composition (100% by mass in total).

The chemical structure of each polymerizable compound in Table 1 is shown below.

Furthermore, the chain compound (B2) in the table was prepared and used in the following manner, namely: formed as a mixture of the compound represented by the above general formula (B2-1) and the compound represented by the general formula (B2-2) , And the average value ^{of n 2} in the formula of the entire mixture becomes 7.

[Example 1]

The content (mass %) of each component of the polymerizable compound is 9.8 parts by mass of the total polymerizable monomer as the value shown in the column of Example 1 of Table 1, and benzalkonium as a polymerization initiator 0.2 parts by mass of benzil dimethylketal, and 90 parts by mass of the following liquid crystal composition "LC-1" whose content (% by mass) of each component of the liquid crystal compound is the value shown in Table 2 was mixed to prepare a composite liquid crystal Composition.

(LC-1)

The characteristics of this liquid crystal composition (LC-1) are as follows.

Transition temperature (N-I): 72.7℃

Refractive index anisotropy△n: 0.168

Dielectric anisotropy △ε: 8.2

Prepare the following glass unit, namely: the unit thickness is 10μm, the ITO electrode is formed on the surface of the individual liquid crystal layer side of a group of two substrates, and the rubbed alignment film is arranged anti-parallel. A vacuum injection method is used to inject the prepared composite liquid crystal composition into the cell, and the injection port is sealed.

At this time, the alignment state in the cell was confirmed. As a result, the liquid crystal composition was aligned in the rubbing treatment direction of the alignment film.

Next, in order to polymerize the polymerizable monomer while maintaining the cell at 25±1°C, ultraviolet rays were irradiated at an irradiation amount of 10mW/cm for 60 seconds to form a phase-separated liquid crystal layer from the composite liquid crystal composition. Polymer dispersion type liquid crystal element. The amount of ultraviolet radiation was measured using UNIMETER UIT-101 with UVD-365PD light receiver manufactured by Ushio Electric Co., Ltd. The obtained liquid crystal element maintained transparency.

Next, the voltage-transmittance characteristics of the obtained liquid crystal element were measured. In the measurement of voltage-transmittance characteristics, use a device equipped with a light projector on one side of the unit and a light receiver on the other side, and set the condition that no polarizing plate is used above and below the unit. The measurement is carried out by the following method, namely: applying a rectangular wave between the electrodes of the cell, increasing the voltage step by step in the interval from 0V to saturation of the transmittance change, and recording the transmittance detected by the light receiver.

Measure the transmittance T ₀ and T ₁₀₀ by the above method, and obtain V ₉₀ . Table 2 shows T ₀ , T ₁₀₀ , contrast T ₀ /T ₁₀₀ , and V ₉₀ at this time.

[Examples 2~4]

It was prepared in the same manner as in Example 1, except that the content (mass%) of each component forming the polymerizable compound was 9.8 parts by mass of the total polymerizable monomers shown in each of Examples 2 to 4 in Table 1. The composite liquid crystal composition was used to measure the voltage-transmittance characteristics of the obtained liquid crystal element.

[Example 5]

The content (mass%) of each component of the mixed polymerizable compound is 14.7 parts by mass of the total polymerizable monomers as shown in the column of Example 5 of Table 1, and IRGACURE 651 manufactured by BASF as a polymerization initiator (Benzyl dimethyl ketal) 0.3 parts by mass and 85 parts by mass of the liquid crystal composition (LC-1) used in Example 1. Hereinafter, a composite liquid crystal composition was prepared in the same manner as in Example 1, and the voltage-transmittance characteristics of the obtained liquid crystal cell were measured.

[Example 6]

Except that 90 parts by mass of the following liquid crystal composition "LC-2" was used instead of the liquid crystal composition "LC-1" in Example 1, a composite liquid crystal composition was prepared in the same manner as in Example 1, and the obtained composite liquid crystal composition was measured. The voltage-transmittance characteristics of liquid crystal elements.

(LC-2)

The characteristics of this liquid crystal composition (LC-2) are as follows.

Transition temperature (N-I): 80.1℃

Refractive index anisotropy △n: 0.194

Dielectric anisotropy △ε: 16.4

[Example 7]

Except that 90 parts by mass of the following liquid crystal composition "LC-3" was used instead of the liquid crystal composition "LC-1" in Example 1, a composite liquid crystal composition was prepared in the same manner as in Example 1, and the resultant was measured. The voltage-transmittance characteristics of liquid crystal elements.

(LC-3)

The characteristics of this liquid crystal composition (LC-3) are as follows.

Transition temperature (N-I): 82.6℃

Refractive index anisotropy △n: 0.201

Dielectric anisotropy △ε: 7.2

[Comparative Example 1]

As shown in Table 1, the following compound was used to replace the liquid crystal polymerizable compound (A1) in Example 1, that is, as the chain polymerizable compound (B2) "A-400" (manufactured by Shinnakamura Chemical Co., Ltd., poly Ethylene glycol diacrylate) 14.7 parts by mass, chain polymerizable compound (B1) 9.8 parts by mass, benzyl dimethyl ketal as a polymerization initiator 0.5 parts by mass, and the content of each component of the liquid crystal compound ( Mass %) is 75 parts by mass of the following liquid crystal composition "LC-1" having the values shown in Table 2. Hereinafter, a composite liquid crystal composition was prepared by the same method as in Example 1 to produce a liquid crystal element. The obtained liquid crystal cell was opaque.

According to Table 2, the liquid crystal elements obtained in Examples 1 to 7 showed a transparent state when the electric field was zero, and showed a light scattering state when the voltage was increased and the transmittance change was saturated. The contrast T ₀ /T ₁₀₀ shows that the larger the value, the more obvious the contrast between transparency and scattering. The contrast ratio T ₀ /T ₁₀₀ of each liquid crystal element was 7 or more, and the driving voltage V ₉₀ was 50 V or less, and practical electro-optical characteristics were obtained. On the other hand, as shown in Comparative Example 1, unless a liquid crystal polymerizable compound is used to produce a liquid crystal element, T ₀ cannot be measured when the electric field is zero.

[Example 8]

The content (mass %) of each component of the mixed polymerizable compound is 2.94 parts by mass of the total polymerizable monomers of the values shown in Example 8 of Table 1, and IRGACURE 651 (benz 0.06 parts by mass of dimethyl ketal) and 97 parts by mass of the liquid crystal composition (LC-1) used in Example 1 to prepare a composite liquid crystal composition.

Prepare the following glass cell, that is, the cell thickness is 3.3μm, the IPS mode comb-shaped electrode of ITO is formed on the liquid crystal layer side of one of the two substrates, and the rubbing treatment of the alignment film is antiparallel The ground is arranged in a direction substantially parallel to the electrode line of the comb-shaped electrode. The prepared composite liquid crystal composition is injected into the cell by a vacuum injection method, and the injection port is sealed. At this time, the alignment state in the cell was confirmed. As a result, the liquid crystal composition was aligned in the rubbing treatment direction of the alignment film.

Next, in order to polymerize the polymerizable monomer while maintaining the cell at 25±1°C, ^{ultraviolet rays were irradiated at an irradiation amount of 10 mW/cm 2} for 60 seconds to form a phase-separated liquid crystal layer from the composite liquid crystal composition. Fabrication of polymer dispersion type liquid crystal element. The amount of ultraviolet radiation was measured using UNIMETER UIT-101 with UVD-365PD light receiver manufactured by Ushio Electric Co., Ltd.

Next, the voltage-transmittance characteristics of the obtained liquid crystal element were measured. In the measurement of voltage-transmittance characteristics, use a device with a light emitter on one side of the cell and a light receiver on the other side, and a polarizing plate is arranged on the top and bottom of the cell so that the polarization directions are perpendicular to each other, and the electrodes of the cell The darkest way to measure the field of view when the voltage is zero is to adjust the rotation angle of the polarizing plate and the unit in the orthogonal arrangement. The measurement was carried out by the following method, that is, applying a rectangular wave between the electrodes of the cell, increasing the voltage step by step in the interval from 0V to saturation of the transmittance change, and recording the transmittance detected by the light receiver.

Measure the transmittance T ₀ and T ₁₀₀ by the above method, and obtain V ₉₀ . Table 3 shows T ₀ , T ₁₀₀ , contrast T ₀ /T ₁₀₀ , and V ₉₀ at this time.

According to Table 3, a liquid crystal polymerizable compound is combined with a liquid crystal composition having a Δn of 0.14 or more and a positive value of Δε of 6 or more to prepare a composite liquid crystal composition, which is injected into the antiparallel alignment treatment and has When making a liquid crystal cell with an IPS comb-shaped electrode cell, if the liquid crystal cell is clamped and measured by a polarizing plate arranged orthogonally, the liquid crystal cell shows a dark state when the electric field is zero, and when the voltage rises and the transmittance change is saturated Shows the status. The contrast T ₀ /T ₁₀₀ shows that the larger the value, the more obvious the contrast between transparency and scattering. In particular, by forming the polymerizable monomer into a mixture of a liquid crystal polymerizable compound and a chain polymerizable compound, and the ratio of the liquid crystal composition in the composite liquid crystal composition is greater than 80% by mass, the contrast ratio T ₁₀₀ /T can be obtained Practical electro-optical characteristics with ₀ being 20 or more and driving voltage V _{90 being 50V or less.}

Claims (5)

A polymer dispersion type liquid crystal element, comprising: a phase-separated liquid crystal layer formed by using a composite liquid crystal composition containing a liquid crystal composition and an alignment polymer, a homogeneous alignment film, and electrodes, as the liquid crystal composition, display positive Electrical anisotropy, the above-mentioned aligning polymer contains: one or two or more types of polymerizable compounds having a mesogenic group represented by the general formula (i), and one or more types of the following general formulae (ii) The chain-like polymerizable compound represented by the composite liquid crystal composition, and the composite liquid crystal composition contains the polymerizable compound represented by the general formula (i) at a ratio of 2 to 20% by mass. It is formed by ultraviolet curing, and the mesogen in the above-mentioned aligning polymer is aligned in the direction of the alignment control force in the homogeneous alignment film,

(In the formula, P ⁱ¹ represents a polymerizable functional group selected from the following (P-1), (P-2), and (P-3),

Sp ⁱ¹ represents a single bond or an alkylene group with 1 to 15 carbon atoms. One or more of -CH ₂ -in the alkylene group can also be -O-, -CH= in a way that oxygen atoms are not directly adjacent to each other. CH-, -CO-, -C≡C-, -OCO- or -COO- substituted; R ⁱ¹ represents -Sp ⁱ¹ -P ⁱ¹ , hydrogen atom, fluorine atom, cyano group, hydrogen atom can also be substituted by halogen atom An alkyl group with 1 to 15 carbon atoms, an alkoxy group with 1 to 15 carbon atoms in which the hydrogen atom may be substituted by a halogen atom, an alkenyl group with 1 to 15 carbon atoms or hydrogen in which the hydrogen atom may be substituted by a halogen atom Alkenyloxy groups with 1 to 15 carbon atoms whose atoms may be substituted by halogen atoms; A ⁱ¹ , A ⁱ² and A ⁱ³ each independently represent a group selected from (a) trans-1,4-cyclohexylene (present in the One methylene group in the group or two or more non-adjacent methylene groups can also be substituted by -O- or -S-), (b) phenylene (one -CH in the group) = Or 2 or more non-adjacent -CH= can also be substituted by a nitrogen atom), and (c) cyclohexenyl, bicyclo(2.2.2) octyl, piperidinyl, naphthyl, decahydro The group consisting of naphthyl and tetrahydronaphthyl; one or more of the hydrogen atoms in the above-mentioned groups (a), group (b) and group (c) may also be independently Fluorine atom, chlorine atom, C1-C8 alkyl group, C1-C8 halogenated alkyl group, C1-C8 halogenated alkoxy group, C1-C8 alkoxy group or -Sp ⁱ¹ -P ⁱ¹ substitution; Z ⁱ¹ and Z ⁱ² each independently represent a single bond, -O-, -S-, -OCH ₂ -, -CH ₂ O-, -CO-, -C ₂ H ₄ -, -COO-, -OCO-, -OCOOCH ₂ -, -CH ₂ OCOO-, -CO-NR ¹¹ -, -NR ¹¹ -CO-, -SCH ₂ -, -CH ₂ S-, -CH=CH-COO -, -OOC-CH=CH-, -COOC ₂ H ₄ -, -OCOC ₂ H ₄ -, -C ₂ H ₄ OCO-, -C ₂ H ₄ COO-, -OCOCH ₂ -, -CH ₂ COO- , -CH=CH-, -CF=CH-, -CH=CF-, -CF ₂ -, -CF ₂ O-, -OCF ₂ -, -CF ₂ CH ₂ -, -CH ₂ CF ₂ -,- CF ₂ CF ₂ -or -C≡C- (where R ¹¹ represents an alkyl group with 1 to 4 carbon atoms); n ⁱ is 0 or 1; when there are multiple -Sp ⁱ¹ -P ⁱ¹ , respectively Can be the same or different),

(In the formula, P ⁱⁱ¹ represents a polymerizable functional group selected from the following (P-1), (P-2), and (P-3),

R ⁱⁱ¹ represents a single bond or an alkylene group having 1 to 9 carbon atoms. One or more of -CH ₂ -in the alkylene group may also be independently -O- in such a manner that the oxygen atoms are not directly adjacent to each other. , -CO-, -COO- or -OCO- substitution, one or more of the hydrogen atoms in the alkylene group may be independently substituted by fluorine atoms; R ⁱⁱ² and R ⁱⁱ³ each independently represent hydrogen Atom or an alkyl group with 1 to 21 carbon atoms, one or two or more of -CH ₂ -in the alkyl group may also be independently substituted by -O-, -CO-,-in such a way that oxygen atoms are not directly adjacent to each other. Replaced by COO- or -OCO-, one or more of the hydrogen atoms in the alkyl group can also be independently replaced by P ⁱⁱ¹ , fluorine atoms, alkyl groups with 1 to 8 carbon atoms, and 1 to carbon atoms. The halogenated alkyl substitution of 8; when there are multiple P ⁱⁱ¹ , they may be the same or different). For example, the polymer dispersion type liquid crystal element of the first item of the scope of patent application, wherein the liquid crystal composition contains one or two or more compounds showing positive dielectric anisotropy, and the compound is a compound represented by general formula (J) ,

(In the formula, R ^J1 represents an alkyl group with 1 to 8 carbon atoms. One of the alkyl groups or two or more non-adjacent -CH ₂ -s may be independently replaced by -CH=CH-,- C≡C-, -O-, -CO-, -COO- or -OCO- substitution; n ^J1 represents 0, 1, 2, 3 or 4; X ^J1 represents hydrogen atom, fluorine atom, chlorine atom, cyano group, Trifluoromethyl, fluoromethoxy, difluoromethoxy, trifluoromethoxy or 2,2,2-trifluoroethyl; Z ^J1 and Z ^J2 each independently represent 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-; for n ^J1 When 2, 3, or 4 and there are multiple A ^J2 , they can be the same or different. When n ^J1 is 2, 3 or 4 and there are multiple Z ^J1 , they can be the same or different; A ^J1 , A ^J2 and A ^J3 each independently represent a group selected from (a) 1,4-cyclohexylene (1 -CH ₂ -existing in the group or 2 or more non-adjacent -CH _2- Can also be substituted by -O-), (b) 1,4-phenylene (1 -CH= or 2 or more non-adjacent -CH= in the group can also be substituted by -N= ), and (c) naphthalene-2,6-diyl, 1,2,3,4-tetrahydronaphthalene-2,6-diyl or decahydronaphthalene-2,6-diyl (present in naphthalene-2 One of ,6-diyl or 1,2,3,4-tetrahydronaphthalene-2,6-diyl -CH= or two or more non-adjacent -CH= can also be substituted by -N= )). For example, the polymer dispersed liquid crystal element of the first item in the scope of patent application, wherein the liquid crystal composition contains one or two or more compounds represented by the general formula (L),

(In the formula, R ^L1 and R ^L2 each independently represent an alkyl group with 1 to 8 carbon atoms, and one or two or more non-adjacent -CH ₂ -s in the alkyl group may be each independently- CH=CH-, -C≡C-, -O-, -CO-, -COO- or -OCO- substitution; n ^L1 represents 0, 1, 2 or 3; A ^L1 , A ^L2 and A ^L3 are independently selected from the group consisting represents (a) 1,4- cyclohexylene (in the presence of a group -CH ₂ - or two or more of the adjacent -CH ₂ - may be replaced by -O-), (b ) 1,4-phenylene (1 -CH= or 2 or more non-adjacent -CH= in the group can also be substituted by -N=), and (c) naphthalene-2,6 -Diyl, 1,2,3,4-tetrahydronaphthalene-2,6-diyl or decahydronaphthalene-2,6-diyl (exist in naphthalene-2,6-diyl or 1,2,3 ,4-Tetrahydronaphthalene-2,6-diyl group consisting of one -CH= or two or more non-adjacent -CH= groups which may also be substituted by -N=), the above-mentioned groups (a), one or two or more hydrogen atoms in the groups of group (b) and group (c) may be independently substituted by cyano, fluorine or chlorine atoms; Z ^L1 and Z ^L2 are each independently Ground represents a single bond, -CH ₂ CH ₂ -, -(CH ₂ ) ₄ -, -OCH ₂ -, -CH ₂ O-, -COO-, -OCO-, -OCF ₂ -, -CF ₂ O-, -CH=NN=CH-, -CH=CH-, -CF=CF- or -C≡C-; when n ^L1 is 2 or 3 and there are multiple A ^L2s , they can be the same or different , When n ^L1 is 2 or 3 and there are multiple Z ^L2s , they may be the same or different). For example, the polymer-dispersed liquid crystal element of any one of items 1 to 3 in the scope of the patent application includes a transparent substrate with a homogeneous alignment film and electrodes, and the transparent substrate has flexibility. A liquid crystal dimming device, which uses the polymer dispersed liquid crystal element of the 4th patent application range.

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