WO2017002701A1 - 液晶組成物およびそれを使用した液晶表示素子 - Google Patents

液晶組成物およびそれを使用した液晶表示素子 Download PDF

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WO2017002701A1
WO2017002701A1 PCT/JP2016/068663 JP2016068663W WO2017002701A1 WO 2017002701 A1 WO2017002701 A1 WO 2017002701A1 JP 2016068663 W JP2016068663 W JP 2016068663W WO 2017002701 A1 WO2017002701 A1 WO 2017002701A1
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liquid crystal
formula
general formula
present
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PCT/JP2016/068663
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French (fr)
Japanese (ja)
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士朗 谷口
晴己 大石
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Dic株式会社
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Priority to KR1020187003047A priority Critical patent/KR20180027531A/ko
Priority to JP2017526313A priority patent/JPWO2017002701A1/ja
Priority to CN201680044843.9A priority patent/CN107849455A/zh
Publication of WO2017002701A1 publication Critical patent/WO2017002701A1/ja

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    • C—CHEMISTRY; METALLURGY
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    • C09K19/00—Liquid crystal materials
    • C09K19/04—Liquid crystal materials characterised by the chemical structure of the liquid crystal components, e.g. by a specific unit
    • C09K19/06—Non-steroidal liquid crystal compounds
    • C09K19/08—Non-steroidal liquid crystal compounds containing at least two non-condensed rings
    • C09K19/10—Non-steroidal liquid crystal compounds containing at least two non-condensed rings containing at least two benzene rings
    • C09K19/12—Non-steroidal liquid crystal compounds containing at least two non-condensed rings containing at least two benzene rings at least two benzene rings directly linked, e.g. biphenyls
    • C—CHEMISTRY; METALLURGY
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    • C09K19/00—Liquid crystal materials
    • C09K19/04—Liquid crystal materials characterised by the chemical structure of the liquid crystal components, e.g. by a specific unit
    • C09K19/42—Mixtures of liquid crystal compounds covered by two or more of the preceding groups C09K19/06 - C09K19/40
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    • C09K19/00—Liquid crystal materials
    • C09K19/04—Liquid crystal materials characterised by the chemical structure of the liquid crystal components, e.g. by a specific unit
    • C09K19/06—Non-steroidal liquid crystal compounds
    • C09K19/08—Non-steroidal liquid crystal compounds containing at least two non-condensed rings
    • C09K19/10—Non-steroidal liquid crystal compounds containing at least two non-condensed rings containing at least two benzene rings
    • C09K19/14—Non-steroidal liquid crystal compounds containing at least two non-condensed rings containing at least two benzene rings linked by a carbon chain
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    • C09K19/00—Liquid crystal materials
    • C09K19/04—Liquid crystal materials characterised by the chemical structure of the liquid crystal components, e.g. by a specific unit
    • C09K19/06—Non-steroidal liquid crystal compounds
    • C09K19/08—Non-steroidal liquid crystal compounds containing at least two non-condensed rings
    • C09K19/10—Non-steroidal liquid crystal compounds containing at least two non-condensed rings containing at least two benzene rings
    • C09K19/14—Non-steroidal liquid crystal compounds containing at least two non-condensed rings containing at least two benzene rings linked by a carbon chain
    • C09K19/16—Non-steroidal liquid crystal compounds containing at least two non-condensed rings containing at least two benzene rings linked by a carbon chain the chain containing carbon-to-carbon double bonds, e.g. stilbenes
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    • C09K19/00—Liquid crystal materials
    • C09K19/04—Liquid crystal materials characterised by the chemical structure of the liquid crystal components, e.g. by a specific unit
    • C09K19/06—Non-steroidal liquid crystal compounds
    • C09K19/08—Non-steroidal liquid crystal compounds containing at least two non-condensed rings
    • C09K19/10—Non-steroidal liquid crystal compounds containing at least two non-condensed rings containing at least two benzene rings
    • C09K19/14—Non-steroidal liquid crystal compounds containing at least two non-condensed rings containing at least two benzene rings linked by a carbon chain
    • C09K19/18—Non-steroidal liquid crystal compounds containing at least two non-condensed rings containing at least two benzene rings linked by a carbon chain the chain containing carbon-to-carbon triple bonds, e.g. tolans
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    • C09K19/06—Non-steroidal liquid crystal compounds
    • C09K19/08—Non-steroidal liquid crystal compounds containing at least two non-condensed rings
    • C09K19/10—Non-steroidal liquid crystal compounds containing at least two non-condensed rings containing at least two benzene rings
    • C09K19/20—Non-steroidal liquid crystal compounds containing at least two non-condensed rings containing at least two benzene rings linked by a chain containing carbon and oxygen atoms as chain links, e.g. esters or ethers
    • C—CHEMISTRY; METALLURGY
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    • C09K19/00—Liquid crystal materials
    • C09K19/04—Liquid crystal materials characterised by the chemical structure of the liquid crystal components, e.g. by a specific unit
    • C09K19/06—Non-steroidal liquid crystal compounds
    • C09K19/08—Non-steroidal liquid crystal compounds containing at least two non-condensed rings
    • C09K19/10—Non-steroidal liquid crystal compounds containing at least two non-condensed rings containing at least two benzene rings
    • C09K19/24—Non-steroidal liquid crystal compounds containing at least two non-condensed rings containing at least two benzene rings linked by a chain containing nitrogen-to-nitrogen bonds
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
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    • C09K19/00—Liquid crystal materials
    • C09K19/04—Liquid crystal materials characterised by the chemical structure of the liquid crystal components, e.g. by a specific unit
    • C09K19/06—Non-steroidal liquid crystal compounds
    • C09K19/08—Non-steroidal liquid crystal compounds containing at least two non-condensed rings
    • C09K19/30—Non-steroidal liquid crystal compounds containing at least two non-condensed rings containing saturated or unsaturated non-aromatic rings, e.g. cyclohexane rings
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K19/00—Liquid crystal materials
    • C09K19/04—Liquid crystal materials characterised by the chemical structure of the liquid crystal components, e.g. by a specific unit
    • C09K19/06—Non-steroidal liquid crystal compounds
    • C09K19/32—Non-steroidal liquid crystal compounds containing condensed ring systems, i.e. fused, bridged or spiro ring systems
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K19/00—Liquid crystal materials
    • C09K19/04—Liquid crystal materials characterised by the chemical structure of the liquid crystal components, e.g. by a specific unit
    • C09K19/06—Non-steroidal liquid crystal compounds
    • C09K19/34—Non-steroidal liquid crystal compounds containing at least one heterocyclic ring
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1337—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers

Definitions

  • the present invention relates to a composition having a positive dielectric anisotropy ( ⁇ ) useful as a liquid crystal display material and a liquid crystal display device using the same.
  • Liquid crystal display elements are used in various measuring instruments, automobile panels, word processors, electronic notebooks, printers, computers, televisions, clocks, advertisement display boards, etc., including watches and calculators.
  • Typical liquid crystal display elements include TN (twisted nematic) type, STN (super twisted nematic) type, vertical alignment type using TFT (thin film transistor), and IPS (in-plane switching) type.
  • Etc. The liquid crystal composition used in these liquid crystal display elements is stable against external stimuli such as moisture, air, heat, light, etc., and exhibits a liquid crystal phase in the widest possible temperature range centering on room temperature. And a low driving voltage is required.
  • the liquid crystal composition is composed of several to tens of kinds of compounds in order to optimize the dielectric anisotropy ( ⁇ ) or the refractive index anisotropy ( ⁇ n) for each display element. Has been.
  • a liquid crystal composition having a negative ⁇ is used in a vertical alignment (VA) type display.
  • a horizontal alignment type display such as a TN type, STN type, or IPS (in-plane switching) type
  • a liquid crystal composition having a positive ⁇ is used in a horizontal alignment type display. Is used.
  • a driving method has been reported in which a liquid crystal composition having a positive ⁇ is vertically aligned when no voltage is applied and a horizontal electric field is applied to display the liquid crystal composition, and the necessity of a liquid crystal composition having a positive ⁇ is further increased. Yes.
  • low voltage driving, high-speed response, and a wide operating temperature range are required in all driving systems.
  • ⁇ is positive, the absolute value is large, the viscosity ( ⁇ ) is small, and a high nematic phase-isotropic liquid phase transition temperature (Tni) is required.
  • Tni nematic phase-isotropic liquid phase transition temperature
  • Examples of the structure of the liquid crystal composition aimed at high-speed response include, for example, a compound represented by the formula (A-1) or (A-2) in which ⁇ is a positive liquid crystal compound, and a liquid crystal compound in which ⁇ is neutral.
  • a liquid crystal composition using a combination of (B) is disclosed (Patent Documents 1 to 4).
  • liquid crystal display elements has expanded, and there has been a significant change in the method of use and manufacturing. In order to cope with these changes, it has become necessary to optimize characteristics other than the basic physical property values as conventionally known. That is, liquid crystal display elements using a liquid crystal composition are widely used, such as VA type and IPS type, and super large size display elements having a size of 50 type or more are practically used. Became. Along with the increase in substrate size, the method of injecting liquid crystal composition into the substrate has become the main method of injection from the conventional vacuum injection method to the drop injection (ODF: One Drop Fill) method. The problem that the drop marks when dropped causes the display quality to deteriorate is brought to the surface.
  • ODF Drop Fill
  • liquid crystal composition used for the active matrix drive liquid crystal display element driven by a TFT element or the like while maintaining the characteristics and performance required for a liquid crystal display element such as high-speed response performance, in addition to the characteristics of having a high specific resistance value or high voltage holding ratio, which are emphasized, and being stable against external stimuli such as light and heat, development in consideration of the manufacturing method of liquid crystal display elements has been required. ing.
  • liquid crystal compounds (B) having a neutral ⁇ used in the liquid crystal compositions described in the examples of Patent Documents 1 to 3 at least one end group (R 1 or R 2 ) has an alkyl group.
  • a liquid crystal composition having a certain level of low viscosity can be prepared, but it has not been able to provide a low-viscosity liquid crystal composition corresponding to the high-speed response trend required for liquid crystal displays. is the current situation.
  • liquid crystal compositions as important as high-speed response are required to be stable against external stimuli such as light and heat, and the liquid crystal state is stably maintained over a long period of time.
  • One of the indicators is low temperature stability.
  • ⁇ represented by the formulas (A-1) and (A-2) as in FIG. 3 is combined with a positive liquid crystal compound, the temperature range and low-temperature stability of the liquid crystal phase are impaired. Therefore, there is a demand for a liquid crystal composition excellent in the temperature range of the liquid crystal phase and the low temperature stability while maintaining high-speed response and ⁇ .
  • the combination of a neutral liquid crystal compound having alkenyl groups at both ends and a positive liquid crystal compound having a specific structure significantly improves the low temperature stability and the temperature range of the liquid crystal phase. And it was confirmed that a low-viscosity liquid crystal composition can be provided.
  • the problem to be solved by the present invention is a liquid crystal composition having a positive ⁇ , a liquid crystal phase having a wide temperature range, low viscosity, and good solubility at low temperatures. Is to provide. Furthermore, another problem to be solved by the present invention is to provide a liquid crystal composition having a liquid crystal phase in a wide temperature range, high specific resistance and voltage holding ratio, and stable to heat and light, By using this, an IPS or FFS type or TN type liquid crystal display element which has excellent transmittance and display quality and hardly causes display defects such as burn-in and dripping marks is provided with a high yield.
  • Another problem to be solved by the present invention is to provide a liquid crystal composition that improves the elastic constant K value related to high-speed response.
  • the present inventors have studied various liquid crystal compounds and various chemical substances, and found that the above problems can be solved by combining specific liquid crystal compounds, and have completed the present invention.
  • Liquid crystal composition containing a compound represented by general formula (i) and one or more selected from the group of compounds represented by general formula (ii) and general formula (iii), and the liquid crystal composition
  • a liquid crystal display device using the liquid crystal and a liquid crystal display device using the liquid crystal composition are provided.
  • the liquid crystal composition having positive dielectric anisotropy of the present invention can obtain a significantly low viscosity, has good solubility at low temperatures, and changes in specific resistance and voltage holding ratio due to heat and light. Very small.
  • the liquid crystal composition having positive dielectric anisotropy of the present invention is represented by the compound represented by the general formula (i), the general formula (ii), and the general formula (iii) contained in the liquid crystal composition.
  • a significantly low viscosity and a high elastic constant Kavg can be obtained, and the solubility at low temperatures is good.
  • the liquid crystal composition of the present invention has a lower viscosity and a synergistic effect of significantly improving low-temperature stability than a liquid crystal composition containing a compound having an alkenyl group on one side.
  • the liquid crystal composition having positive dielectric anisotropy of the present invention can obtain a significantly low viscosity, has good solubility at low temperatures, and changes in specific resistance and voltage holding ratio due to heat and light. Since it is extremely small, the practicality of the product is high, and an IPS type or FFS type liquid crystal display element using the product can achieve high-speed response.
  • the present invention can stably exhibit performance in the liquid crystal display element manufacturing process, display defects due to the process can be suppressed and manufacturing can be performed with a high yield, which is very useful.
  • the liquid crystal composition of the present invention preferably exhibits a liquid crystal phase at room temperature (25 ° C.), and more preferably exhibits a nematic phase.
  • the liquid crystal composition of the present invention contains a dielectrically nearly neutral compound ( ⁇ value is ⁇ 2 to 2) and a positive compound ( ⁇ value is larger than 2).
  • the dielectric anisotropy of the compound is a value extrapolated from the measured value of the dielectric anisotropy of a liquid crystal composition prepared by adding to a liquid crystal composition that is almost dielectrically neutral at 25 ° C.
  • content is described in% below, this means weight%.
  • the first of the present invention is the general formula (i):
  • R ia and R ib are each independently an alkenyl group having 2 to 8 carbon atoms
  • a i1 and B i1 are the following groups (a) and (b):
  • (B) 1,4-phenylene group one —CH ⁇ present in this group or two or more non-adjacent —CH ⁇ may be replaced by —N ⁇
  • Each of the above groups (b) may be independently substituted with a cyano group, a fluorine atom or a chlorine atom, m i1 is an integer of 0 to 3.
  • R ii1 represents an alkyl group having 1 to 8 carbon atoms or an alkenyl group having 2 to 10 carbon atoms, and one or two or more non-adjacent —CH in the group. 2 — each independently may be substituted by —C ⁇ C—, —O—, —CO—, —COO— or —OCO—, and one or two or more adjacent non-adjacent groups in the group
  • Each hydrogen atom may be independently substituted with a fluorine atom
  • K ii0 , K ii1 and K ii2 are each independently the following groups (a) and (b): (A) 1,4-cyclohexylene group (the one present in the group -CH 2 - or 2 nonadjacent or more -CH 2 - may be replaced by -O- or S- .)
  • B 1,4-phenylene group (one —CH ⁇ present in this group or two or more non-adjacent
  • n iik independently represents 0, 1, 2, 3 or 4, and when n iiik is 2 or more, K ii2 may be the same or different, and when n iiik is 2 or more, Z ii3 May be the same or different, X ii1 , X ii2 , X ii3 and X ii4 each independently represent a hydrogen atom or a fluorine atom, Y ii1 independently represents a compound represented by a fluorine atom, a cyano group, a trifluoromethyl group, a fluoromethoxy group, a difluoromethoxy group, a trifluoromethoxy group, or a 2,2,2-trifluoroethyl group, and a general formula (Iii):
  • R iii1 represents an alkyl group having 1 to 8 carbon atoms, and one or two or more non-adjacent —CH 2 — in the alkyl group are each independently —CH 2.
  • ⁇ CH—, —C ⁇ C—, —O—, —CO—, —COO— or OCO— may be substituted,
  • n iii1 represents 0, 1, 2, 3 or 4;
  • a iii1 and A iii2 are each independently (A) 1,4-cyclohexylene group (the one present in the group -CH 2 - or 2 nonadjacent or more -CH 2 - may be replaced by -O- or S- )
  • 1,4-phenylene group one —CH ⁇ present in this group or two or more non-adjacent —CH ⁇ may be replaced by —N ⁇ ).
  • Each of the groups (a) and (b) may be independently substituted with a cyano group, a fluorine atom or a chlorine atom
  • Z iii1 and Z iii2 are each independently a single bond, —CH 2 CH 2 —, — (CH 2 ) 4 —, —OCH 2 —, —CH 2 O—, —OCF 2 —, —CF 2 O— , -COO-, -OCO- or C ⁇ C- when n iii1 is 2, 3 or 4 and a plurality of A iii2 are present, they may be the same or different; n iii1 is 2, 3 or 4 and a plurality of Z iii1 is present If they are the same or different, X ii3 and X iii4 each independently represent a hydrogen atom, a chlorine atom or a fluorine atom, Y iii2 represents a hydrogen atom, a fluorine
  • the liquid crystal composition according to the present invention includes a compound represented by the general formula (i) and a compound represented by the general formula (ii) or the general formula (iii). Compared with a liquid crystal composition containing only a group compound, the viscosity is lower and the low-temperature stability is significantly improved. More specifically, as compared with a liquid crystal composition in which a plurality of compounds having one alkenyl group on one side are mixed, the present invention has low viscosity and excellent low-temperature stability, and can improve the elastic constant (particularly K33).
  • the liquid crystal composition of the present invention has a refractive index anisotropy ( ⁇ n) at 25 ° C. of 0.06 to 0.20, more preferably 0.07 to 0.18, and 0.08 to 0.16. Particularly preferred. More specifically, when it corresponds to a thin cell gap, it is preferably 0.11 to 0.14, and when it corresponds to a thick cell gap, it is preferably 0.08 to 0.11.
  • the liquid crystal composition of the present invention preferably has a dielectric anisotropy ( ⁇ ) at 25 ° C. of +1 to +15, more preferably +1.5 to +12, and further preferably +2 to +10.
  • the liquid crystal composition of the present invention has a nematic phase-isotropic liquid phase transition temperature (T ni ) of 60 ° C. to 120 ° C., more preferably 70 ° C. to 110 ° C., and particularly preferably 70 ° C. to 100 ° C.
  • T ni nematic phase-isotropic liquid phase transition temperature
  • the liquid crystal composition of the present invention has a viscosity ( ⁇ ) at 25 ° C. of 5 to mPa ⁇ s, more preferably 18 mPa ⁇ s or less, and particularly preferably 15 mPa ⁇ s or less.
  • the liquid crystal composition of the present invention has a rotational viscosity ( ⁇ 1 ) at 25 ° C. of 20 to 120 mPa ⁇ s, more preferably 100 mPa ⁇ s or less, still more preferably 80 mPa ⁇ s or less, It is particularly preferably 60 mPa ⁇ s or less.
  • the Kaverage (also referred to as Kavg) according to the present invention is preferably 10 pN or more, more preferably in the range of 10 to 20, still more preferably in the range of 10 to 19, and in the range of 11 to 18 Is more preferably in the range of 11 to 17, and particularly preferably in the range of 12 to 16.
  • K11, K22, and K33 can be obtained from the applied voltage-capacitance curve characteristics of the cell in which the liquid crystal is sealed, and the Coverage can be calculated as an average value thereof.
  • the compound represented by the general formula (i) according to the present invention is preferably a dielectrically neutral compound ( ⁇ value is ⁇ 2 to 2).
  • R ia and R ib are each independently an alkenyl group having 2 to 8 carbon atoms, preferably linear or branched, and more preferably linear.
  • a straight-chain alkenyl group having 2 to 6 carbon atoms is more preferable, and a straight-chain alkenyl group having 2 to 3 carbon atoms is particularly preferable.
  • the more preferable alkenyl group according to the present invention is preferably selected from groups represented by any one of formula (R1) to formula (R5). (The black dots in each formula represent carbon atoms in the ring structure.)
  • examples of the alkenyl group are common and are appropriately selected from the above examples depending on the number of carbon atoms of each alkyl group.
  • R ia and R ib are each independently preferably formula (R1), formula (R2), or formula (R4), more preferably formula (R1), or formula (R2). .
  • the liquid crystal composition is a mixture of two or more compounds having an aralkenyl group on one side. Synergy is shown in the effect of the decrease in viscosity and the improvement of the elastic constant K33.
  • a i1 and B i1 are preferably each independently a group selected from the group consisting of a 1,4-cyclohexylene group and a 1,4-phenylene group. Then, it may be substituted with a fluorine atom.
  • R ib is more preferably a group selected from (R4) and (R5).
  • m i1 is preferably an integer from 0 to 2, more preferably m i1 is an integer of 0 or 1, particularly preferably m i1 is zero. That is, the compound represented by the formula (i) is preferably a 2- to 4-ring compound, more preferably a 2- to 3-ring compound, and particularly preferably a 2-ring compound.
  • the compound represented by the said general formula (i) is equipped with two cyclohexane rings in a molecule
  • the lower limit of the preferable content of the compound represented by the formula (i) with respect to the total amount of the liquid crystal composition of the present invention is 1%, 5%, 10%, 13%, 15%, 17%, 20%, 23%, 25%, 30%, 31%, 32%, 33%, 34%, 36%, 38% and 39%.
  • the upper limit value of the preferable content is 65%, 63%, 60%, 58%, 57%, and 55% with respect to the total amount of the liquid crystal composition of the present invention, 53%, 52%, 50%, 48%, 40%, 37%, 35%, 33%, 30%, 27%, 25%, 23%, 20%, 17%, 15%, 13%, 10%.
  • the compound represented by the general formula (i) is preferably the following general formula (ia).
  • R ia and R ib are each independently an alkenyl group having 2 to 5 carbon atoms
  • a i3 represents the following groups (a) and (b): (A) 1,4-cyclohexylene group (this is present in the group one -CH 2 - or non-adjacent two or more -CH 2 - may be replaced by -O-.) (B) 1,4-phenylene group (one —CH ⁇ present in this group or two or more non-adjacent —CH ⁇ may be replaced by —N ⁇ )
  • the group (a) and the group (b) may be each independently substituted with a cyano group, a fluorine atom or a chlorine atom, m i2 represents an integer of 0 to 1.
  • a i3 is preferably a 1,4-phenylene group, and in the general formula ( ia ), m i2 is particularly preferably 0.
  • the elastic constant can be improved and a low-viscosity liquid crystal composition can be realized.
  • the liquid crystal composition combined with the general formula (ii) or (iii) can realize high-speed response with low viscosity.
  • the lower limit of the preferable content of the compound represented by the general formula (ia) with respect to the total amount of the composition of the present invention is 1%, 2%, 3%, 5% Yes, 7%, 8%, 10%, 13%, 15%, 17%, 20%, 23%, 25%, 30% Yes, 31%, 32%, 33%. 34%, 36%, 38%, and 39%.
  • the upper limit of the preferable content is 65%, 63%, 60%, 58%, 57%, 55%, and 53% with respect to the total amount of the composition of the present invention. %, 52%, 50%, 48%, 40%, 37%, 35%, 33%, 30%, 27%, 25% %, 23%, 20%, 17%, 15%, 13%, 12%, and 10%.
  • the compound represented by the general formula (i) is preferably a compound selected from the group of compounds represented by the general formula (i-1).
  • R ia and R ib each independently represents an alkenyl group having 2 to 8 carbon atoms
  • R ia and R ib are preferably each independently a linear alkenyl group having 2 to 6 carbon atoms.
  • the lower limit of the preferable content of the compound represented by formula (i-1) with respect to the total amount of the liquid crystal composition of the present invention is 1%, 5%, 10%, 13% Yes, 15%, 17%, 20%, 23%, 25%, 30%, 31%, 32%, 33%. 34%, 36%, 38%, and 39%.
  • the upper limit value of the preferable content is 65%, 63%, 60%, 58%, 57%, and 55% with respect to the total amount of the liquid crystal composition of the present invention, 53%, 52%, 50%, 48%, 40%, 37%, 35%, 33%, 30%, 27%, 25%, 23%, 20%, 17%, 15%, 13%, 10%.
  • the compound represented by the general formula (i-1) is preferably a compound selected from the group of compounds represented by the formulas (i-1.1) to (i-1.15) From the compounds represented by formulas (i-1.1) to (i-1.5), formula (i-1.7), formula (i-1.8), and formula (i-1.14) More preferably, it is a compound selected from the group consisting of compounds represented by formula (i-1.1), formula (i-1.2) and formula (i-1.4). preferable.
  • the compounds represented by the formulas (i-1.1) and (i-1.4) are preferable because the response speed of the liquid crystal composition of the present invention is particularly improved. Further, when obtaining Tni higher than the response speed, it is expressed by the equation (i-1.2), the equation (i-1.3), the equation (i-1.7), and the equation (i-1.8). It is preferable to use the compound. In order to improve the solubility at a low temperature, it is represented by the formula (i-1.1), the formula (i-1.3), the formula (i-1.4) and the formula (i-1.5). Are preferred. Furthermore, the compounds represented by formula (i-1.1), formula (i-1.2) and formula (i-1.4) are preferable for improving the value of low viscosity and elastic constant K33.
  • the compound represented by the general formula (i) is the following compound represented by the general formula (i-2).
  • R ia and R ib each independently represents an alkenyl group having 2 to 8 carbon atoms
  • R ia and R ib are preferably each independently a linear alkenyl group having 2 to 5 carbon atoms.
  • the lower limit of the preferred content of the compound represented by formula (i-2) with respect to the total amount of the liquid crystal composition of the present invention is 1%, 5%, 10%, 13% Yes, 15%, 17%, 20%, 23%, 25%, 30%.
  • the upper limit of the preferable content is 60%, 55%, 50%, 45%, 40%, and 37% with respect to the total amount of the liquid crystal composition of the present invention. 35%, 33%, 30%, 27%, 25%, 23%, 20%, 17%, 15%, 13%, 10%.
  • the compound represented by general formula (i-2) is preferably a compound selected from the group of compounds represented by formula (i-2.1) to formula (i-2.8) More preferably, the compound is selected from the group consisting of compounds represented by (i-2.1), formula (i-2.2), formula (i-2.5), and formula (i-2.6). .
  • the compound represented by the general formula (i) is preferably a compound represented by the following general formula (i-3).
  • R ia and R ib each independently represents an alkenyl group having 2 to 8 carbon atoms
  • R ia and R ib are preferably each independently a linear alkenyl group having 2 to 5 carbon atoms.
  • the lower limit of the preferable content of the compound represented by the formula (i-3) with respect to the total amount of the liquid crystal composition of the present invention is 1%, 5%, 10%, 13% Yes, 15%, 17%, 20%, 23%, 25%, 30%.
  • the upper limit of the preferable content is 60%, 55%, 50%, 45%, 40%, and 37% with respect to the total amount of the liquid crystal composition of the present invention. 35%, 33%, 30%, 27%, 25%, 23%, 20%, 17%, 15%, 13%, 10%.
  • the compound represented by the general formula (i-3) is preferably a compound selected from the group of compounds represented by the formula (i-3.1) to the formula (i-3.3).
  • the compound represented by the general formula (i) is preferably a compound represented by the following general formula (i-4).
  • R ia and R ib each independently represents an alkenyl group having 2 to 8 carbon atoms
  • R ia and R ib are preferably each independently a linear alkenyl group having 2 to 5 carbon atoms.
  • the lower limit of the preferable content of the compound represented by formula (i-4) with respect to the total amount of the liquid crystal composition of the present invention is 1%, 5%, 10%, 13% Yes, 15%, 17%, 20%, 23%, 25%, 30%.
  • the upper limit of the preferable content is 60%, 55%, 50%, 45%, 40%, and 37% with respect to the total amount of the liquid crystal composition of the present invention. 35%, 33%, 30%, 27%, 25%, 23%, 20%, 17%, 15%, 13%, 10%.
  • the compound represented by general formula (i-4) is preferably a compound selected from the group of compounds represented by formula (i-4.1) to formula (i-4.2)
  • the compound represented by (i-4.1) is more preferable.
  • the compound represented by the general formula (i) is preferably a compound represented by the following general formula (i-5).
  • R ia and R ib each independently represents an alkenyl group having 2 to 8 carbon atoms
  • R ia and R ib are preferably each independently a linear alkenyl group having 2 to 5 carbon atoms.
  • the lower limit of the preferable content of the compound represented by the formula (i-5) with respect to the total amount of the liquid crystal composition of the present invention is 1%, 5%, 10%, 13% Yes, 15%, 17%, 20%, 23%, 25%, 30%.
  • the upper limit of the preferable content is 60%, 55%, 50%, 45%, 40%, and 37% with respect to the total amount of the liquid crystal composition of the present invention. 35%, 33%, 30%, 27%, 25%, 23%, 20%, 17%, 15%, 13%, 10%.
  • the compound represented by general formula (i-5) is preferably a compound selected from the group of compounds represented by formula (i-5.1) to formula (i-5.3).
  • the compound represented by the general formula (ii) according to the present invention is preferably a positive compound (the value of ⁇ is greater than 2).
  • R ii1 preferably represents an alkyl group having 1 to 8 carbon atoms or an alkenyl group having 2 to 8 carbon atoms.
  • K ii1 and K ii2 are each independently a 1,4-cyclohexylene group (one or two or more non-adjacent —CH 2 — in the group is substituted by —O—). Or a 1,4-phenylene group, and each hydrogen atom in the group may independently be substituted with a fluorine atom.
  • K ii0 represents a 1,4-cyclohexylene group (one or two or more non-adjacent —CH 2 — in the group may be substituted by —O—) or It preferably represents a 1,4-phenylene group.
  • Z ii1, Z ii2 or Z ii3 is a single bond, -OCH 2 -, - CH 2 O -, - OCF 2 -, - CF 2 O- or -CH 2 CH 2 CF 2 O—, and when n ik is 0, any one of Z ii1 and Z ii2 represents —OCH 2 — or —CH 2 O—, and when n ik is 1 or more , Z ii1 , Z ii2 and Z ii3 each represent —OCH 2 — or —CH 2 O—, and any one of Z ii1 , Z ii2 or Z ii3 is a single bond, —OCH 2 -, -CH 2 O- or -CH 2 CH 2 CF 2 O-, and any one of Z ii1 , Z i2 or Z ii3 represents -OCH 2 -or -CH 2 O-
  • n ik preferably represents 0, 1 or 2, and when n ik is 2 or more, K ii2 may be the same or different, and n ik is 0 or 1. It is more preferable to represent. From the viewpoint of dielectric constant and ⁇ n, it is preferable that three (or more) benzene rings are included.
  • Y ii1 represents a fluorine atom, a trifluoromethyl group, a fluoromethoxy group, a difluoromethoxy group, a trifluoromethoxy group, a 2,2,2-trifluoroethyl group, or 1 to 5 carbon atoms.
  • the lower limit of the preferable content of the compound represented by the general formula (ii) with respect to the total amount of the liquid crystal composition of the present invention is 1%, 2%, 4%, and 5%. 8%, 10%, 13%, 15%, 18%, and 20%.
  • the upper limit of the preferable content is 40%, 37%, 35%, 32%, 30%, 28%, 25%, 23%, 20% 18% 15% 13% 10% 10% 8% 5%
  • the compound represented by the general formula (ii) according to the present invention preferably has the following partial structure in its structure.
  • the black spot in the formula represents a carbon atom in the ring structure to which the partial structure is bonded.
  • the compound having the partial structure is preferably at least one selected from the group of compounds represented by general formulas (ii-1) to (ii-9).
  • the compound represented by the general formula (ii-1) is as follows.
  • X ii111 and X ii112 each independently represent a fluorine atom or a hydrogen atom
  • Y ii111 represents a fluorine atom
  • R ii111 represents an alkyl group having 1 to 5 carbon atoms
  • W ii111 and W ii112 each independently represent —CH 2 — or —O—.
  • X ii111 and X ii112 are preferably fluorine atoms.
  • the lower limit of the preferable content of the compound represented by the general formula (ii-1) with respect to the total amount of the liquid crystal composition of the present invention is 1%, 2%, 4%, 5% 8%, 10%, 13%, 15%, 18%, 20%.
  • the upper limit of the preferred content is 30%, 28%, 25%, 23%, 20%, 18%, 15%, 13%, 10% 8% and 5%.
  • the composition of the liquid crystal composition of the present invention keeps the viscosity low and the response speed is fast, it is preferable to lower the lower limit and lower the upper limit. Furthermore, when a composition that does not easily cause seizure is required, it is preferable to lower the lower limit and lower the upper limit. Further, when it is desired to increase the dielectric anisotropy in order to keep the driving voltage low, it is preferable to increase the upper limit value while increasing the lower limit value.
  • the compounds represented by the general formula (ii-1) used in the liquid crystal composition of the present invention are specifically represented by the formulas (ii-1.1) to (ii-1.12). Among them, it is preferable to contain a compound represented by formula (ii-1.5) to formula (ii-1.12).
  • the lower limit of the preferable content of these compounds with respect to the total amount of the liquid crystal composition of the present invention is 1%, 2%, 4%, 5%, 8%, 10% 13%, 15%, 18%, 20%.
  • the upper limit of the preferred content is 30%, 28%, 25%, 23%, 20%, 18%, 15%, 13%, 10% 8% and 5%.
  • the compound represented by the general formula (ii-2) is as follows.
  • X ii121 to X ii124 each independently represents a fluorine atom or a hydrogen atom
  • Y ii121 represents a fluorine atom, a chlorine atom or OCF 3
  • R ii121 represents an alkyl group having 1 to 5 carbon atoms
  • the lower limit of the preferable content of the compound represented by the general formula (ii-2) with respect to the total amount of the liquid crystal composition of the present invention is 1%, 2%, 4%, 5% 8%, 10%, 13%, 15%, 18%, 20%.
  • the upper limit of the preferred content is 30%, 28%, 25%, 23%, 20%, 18%, 15%, 13%, 10% 8% and 5%.
  • the composition of the liquid crystal composition of the present invention keeps the viscosity low and the response speed is fast, it is preferable to lower the lower limit and lower the upper limit. Furthermore, when a composition that does not easily cause seizure is required, it is preferable to lower the lower limit and lower the upper limit. Further, when it is desired to increase the dielectric anisotropy in order to keep the driving voltage low, it is preferable to increase the upper limit value while increasing the lower limit value.
  • the compounds represented by the general formula (ii-2) used in the liquid crystal composition of the present invention are specifically represented by the formulas (ii-2.1) to (ii-2.8).
  • the lower limit of the preferable content of these compounds with respect to the total amount of the liquid crystal composition of the present invention is 1%, 2%, 4%, 5%, 8%, 10% 13%, 15%, 18%, 20%.
  • the upper limit of the preferred content is 30%, 28%, 25%, 23%, 20%, 18%, 15%, 13%, 10% 8% and 5%.
  • the compound represented by the general formula (ii-3) is as follows.
  • X Ii131 and X Ii132 each independently represents a fluorine atom or a hydrogen atom
  • Y Ii131 fluorine atom a chlorine atom or OCF 3
  • R ii131 represents an alkyl group having 1 to 5 carbon atoms
  • carbon atoms Represents an alkenyl group having 2 to 5 atoms or an alkoxy group having 1 to 4 carbon atoms
  • W ii131 and W ii132 each independently represent —CH 2 — or O—.
  • the lower limit of the preferable content of the compound represented by the general formula (ii-3) with respect to the total amount of the liquid crystal composition of the present invention is 1%, 2%, 4%, 5% 8%, 10%, 13%, 15%, 18%, 20%.
  • the upper limit of the preferred content is 30%, 28%, 25%, 23%, 20%, 18%, 15%, 13%, 10% 8% and 5%.
  • the composition of the liquid crystal composition of the present invention keeps the viscosity low and the response speed is fast, it is preferable to lower the lower limit and lower the upper limit. Furthermore, when a composition that does not easily cause seizure is required, it is preferable to lower the lower limit and lower the upper limit. Further, when it is desired to increase the dielectric anisotropy in order to keep the driving voltage low, it is preferable to increase the upper limit value while increasing the lower limit value.
  • the compounds represented by the general formula (ii-3) used in the liquid crystal composition of the present invention are specifically represented by the formulas (ii-3.1) to (ii-3.12). Among them, it is preferable to contain a compound represented by formula (ii-3.5) to formula (ii-3.8).
  • the lower limit of the preferable content of these compounds with respect to the total amount of the liquid crystal composition of the present invention is 1%, 2%, 4%, 5%, 8%, 10% 13%, 15%, 18%, 20%.
  • the upper limit of the preferred content is 30%, 28%, 25%, 23%, 20%, 18%, 15%, 13%, 10% 8% and 5%.
  • the compound represented by the general formula (ii-4) is as follows.
  • X ii141 to X ii144 each independently represents a fluorine atom or a hydrogen atom
  • Y ii141 represents a fluorine atom, a chlorine atom or OCF 3
  • R ii141 represents an alkyl group having 1 to 5 carbon atoms
  • W ii141 and Wii142 each independently represent —CH 2 — or —O—.
  • X ii141 and W ii142 when at least one of W ii141 and W ii142 is —O—, it is preferable that X ii143 and X ii144 are fluorine atoms.
  • the lower limit of the preferable content of the compound represented by the general formula (ii-4) with respect to the total amount of the liquid crystal composition of the present invention is 1%, 2%, 4%, 5% 8%, 10%, 13%, 15%, 18%, 20%.
  • the upper limit of the preferred content is 30%, 28%, 25%, 23%, 20%, 18%, 15%, 13%, 10% 8% and 5%.
  • the composition of the liquid crystal composition of the present invention keeps the viscosity low and the response speed is fast, it is preferable to lower the lower limit and lower the upper limit. Furthermore, when a composition that does not easily cause seizure is required, it is preferable to lower the lower limit and lower the upper limit. Further, when it is desired to increase the dielectric anisotropy in order to keep the driving voltage low, it is preferable to increase the upper limit value while increasing the lower limit value.
  • the compounds represented by the general formula (ii-4) used in the liquid crystal composition of the present invention are specifically represented by the formulas (ii-4.1) to (ii-4.28). From the formulas (ii-4.1) to (ii-4.4), (ii-4.11) to (ii-4.18), (ii-4.21) It is preferable to contain a compound represented by (ii-4.28), and the compounds represented by formulas (ii-4.1) to (ii-4.4), (ii-4.11) to (ii-4.14) ), And (ii-4.25) to (ii-4.28) are more preferable.
  • the lower limit of the preferable content of these compounds with respect to the total amount of the liquid crystal composition of the present invention is 1%, 2%, 4%, 5%, 8%, 10% 13%, 15%, 18%, 20%.
  • the upper limit of the preferred content is 30%, 28%, 25%, 23%, 20%, 18%, 15%, 13%, 10% 8% and 5%.
  • the compound represented by the general formula (ii-5) is as follows.
  • X ii151 to X ii154 each independently represents a fluorine atom or a hydrogen atom
  • Y ii151 represents a fluorine atom, a chlorine atom or OCF 3
  • R ii151 represents an alkyl group having 1 to 5 carbon atoms
  • W ii151 and W ii152 each independently represent —CH 2 — or O—.
  • the lower limit of the preferable content of the compound represented by the general formula (ii-5) with respect to the total amount of the liquid crystal composition of the present invention is 1%, 2%, 4%, 5% 8%, 10%, 13%, 15%, 18%, 20%.
  • the upper limit of the preferred content is 30%, 28%, 25%, 23%, 20%, 18%, 15%, 13%, 10% 8% and 5%.
  • the composition of the liquid crystal composition of the present invention keeps the viscosity low and the response speed is fast, it is preferable to lower the lower limit and lower the upper limit. Furthermore, when a composition that does not easily cause seizure is required, it is preferable to lower the lower limit and lower the upper limit. Further, when it is desired to increase the dielectric anisotropy in order to keep the driving voltage low, it is preferable to increase the upper limit value while increasing the lower limit value.
  • the compounds represented by the general formula (ii-5) used in the liquid crystal composition of the present invention are specifically represented by the formulas (ii-5.1) to (ii-5.8). Among them, it is preferable to contain a compound represented by formula (ii-5.5) or formula (ii-5.8).
  • the lower limit of the preferable content of these compounds with respect to the total amount of the liquid crystal composition of the present invention is 1%, 2%, 4%, 5%, 8%, 10% 13%, 15%, 18%, 20%.
  • the upper limit of the preferred content is 30%, 28%, 25%, 23%, 20%, 18%, 15%, 13%, 10% 8% and 5%.
  • the compound represented by the general formula (ii-6) is as follows.
  • X ii161 and X ii162 each independently represent a fluorine atom or a hydrogen atom
  • Y ii161 represents a fluorine atom, a chlorine atom or OCF 3
  • R ii161 represents an alkyl group having 1 to 5 carbon atoms
  • carbon Represents an alkenyl group having 2 to 5 atoms or an alkoxy group having 1 to 4 carbon atoms
  • W ii161 and W ii162 each independently represent —CH 2 — or O—.
  • the lower limit of the preferable content of the compound represented by the general formula (ii-6) with respect to the total amount of the liquid crystal composition of the present invention is 1%, 2%, 4%, 5% 8%, 10%, 13%, 15%, 18%, 20%.
  • the upper limit of the preferred content is 30%, 28%, 25%, 23%, 20%, 18%, 15%, 13%, 10% 8% and 5%.
  • the composition of the liquid crystal composition of the present invention keeps the viscosity low and the response speed is fast, it is preferable to lower the lower limit and lower the upper limit. Furthermore, when a composition that does not easily cause seizure is required, it is preferable to lower the lower limit and lower the upper limit. Further, when it is desired to increase the dielectric anisotropy in order to keep the driving voltage low, it is preferable to increase the upper limit value while increasing the lower limit value.
  • the compounds represented by the general formula (ii-6) used in the liquid crystal composition of the present invention are specifically represented by the formulas (ii-6.1) to (ii-6.14).
  • the compounds represented by formula (ii-6.5) to formula (ii-6.8) and formula (ii-6.11) to formula (ii-6.14) are particularly preferable. It is preferable to contain.
  • the lower limit of the preferable content of these compounds with respect to the total amount of the liquid crystal composition of the present invention is 1%, 2%, 4%, 5%, 8%, 10% 13%, 15%, 18%, 20%.
  • the upper limit of the preferred content is 30%, 28%, 25%, 23%, 20%, 18%, 15%, 13%, 10% 8% and 5%.
  • the compound represented by the general formula (ii-7) is as follows.
  • X ii171 to X ii174 each independently represents a fluorine atom or a hydrogen atom
  • Y ii171 represents a fluorine atom, a chlorine atom or OCF 3
  • R ii171 represents an alkyl group having 1 to 5 carbon atoms
  • the lower limit of the preferable content of the compound represented by the general formula (ii-7) with respect to the total amount of the liquid crystal composition of the present invention is 1%, 2%, 4%, 5% 8%, 10%, 13%, 15%, 18%, 20%.
  • the upper limit of the preferred content is 30%, 28%, 25%, 23%, 20%, 18%, 15%, 13%, 10% 8% and 5%.
  • the composition of the liquid crystal composition of the present invention keeps the viscosity low and the response speed is fast, it is preferable to lower the lower limit and lower the upper limit. Furthermore, when a composition that does not easily cause seizure is required, it is preferable to lower the lower limit and lower the upper limit. Further, when it is desired to increase the dielectric anisotropy in order to keep the driving voltage low, it is preferable to increase the upper limit value while increasing the lower limit value.
  • the compounds represented by the general formula (ii-7) used in the liquid crystal composition of the present invention are specifically represented by the formulas (ii-7.1) to (ii-7.8). Among them, it is preferable to contain a compound represented by formula (ii-7.1) to formula (ii-7.4).
  • the lower limit of the preferable content of these compounds with respect to the total amount of the liquid crystal composition of the present invention is 1%, 2%, 4%, 5%, 8%, 10% 13%, 15%, 18%, 20%.
  • the upper limit of the preferred content is 30%, 28%, 25%, 23%, 20%, 18%, 15%, 13%, 10% 8% and 5%.
  • the compound represented by the general formula (ii-8) is as follows.
  • X ii181 to X ii184 each independently represents a fluorine atom or a hydrogen atom
  • Y ii181 represents a fluorine atom, a chlorine atom or OCF 3
  • R ii181 represents an alkyl group having 1 to 5 carbon atoms
  • W ii181 and W ii182 each independently represent —CH 2 — or —O—.
  • the dielectric anisotropy and the elastic constant K11 can be increased. It is preferable when importance is attached to solubility only one of W Ii181 and W Ii182 is -O-, and it when importance is attached to dielectric anisotropy both W Ii181 and W Ii182 is -O- preferably, in either case, either X Ii181 or X Ii182, or by replacing both X Ii181 and X Ii182 fluorine, it is possible to obtain a higher dielectric anisotropy and high solubility, both Is replaced with a fluorine atom, the effect of increasing the elastic constant K11 is somewhat diminished.
  • At least one of X ii183 and X ii184 is preferably a fluorine atom, and more preferably both are fluorine atoms. Even if both W ii181 and W ii182 are —CH 2 —, high dielectric anisotropy and high solubility can be obtained by substituting either or both of X ii181 and X ii182 with fluorine. However, in that case, the elastic constant K11 is significantly lower than that of the compound into which — ⁇ — is introduced.
  • This decrease in elastic constant may cause a decrease in threshold voltage in a TN display, a decrease in drive voltage in an IPS display and an FFS display, a decrease in transmittance, and a deterioration in response speed of return.
  • Ii181 and W ii182, and, X ii181 and X Ii182 is appropriately selected depending on the purpose.
  • Y ii181 is preferably a fluorine atom, —OCF 3 , —CF 3 , or a fluorinated alkyl group having 2 or more carbon atoms, and particularly preferably fluorine.
  • the lower limit of the preferable content of the compound represented by the general formula (ii-8) with respect to the total amount of the liquid crystal composition of the present invention is 1%, 2%, 3%, 4% 5%, 8%, 10%, 12%, 13%, 15%, 18%, 20%.
  • the upper limit of the preferred content is 30%, 28%, 25%, 23%, 20%, 18%, 15%, 13%, 10% 8% and 5%.
  • the composition of the liquid crystal composition of the present invention keeps the viscosity low and the response speed is fast, it is preferable to lower the lower limit and lower the upper limit. Furthermore, when a composition that does not easily cause seizure is required, it is preferable to lower the lower limit and lower the upper limit. Further, when it is desired to increase the dielectric anisotropy in order to keep the driving voltage low, it is preferable to increase the upper limit value while increasing the lower limit value.
  • the compounds represented by the general formula (ii-8) used in the liquid crystal composition of the present invention are specifically represented by the formulas (ii-8.1) to (ii-8.52).
  • compounds represented by formula (ii-8.21) to formula (ii-8.32) and formula (ii-8.41) to formula (ii-8.48) are particularly preferable. It is preferable to contain.
  • the lower limit of the preferable content of these compounds with respect to the total amount of the liquid crystal composition of the present invention is 1%, 2%, 4%, 5%, 8%, 10% 13%, 15%, 18%, 20%.
  • the upper limit of the preferred content is 30%, 28%, 25%, 23%, 20%, 18%, 15%, 13%, 10% 8% and 5%.
  • the compound represented by the general formula (ii-9) is as follows.
  • X ii191 to X ii196 each independently represents a fluorine atom or a hydrogen atom
  • Y ii191 represents a fluorine atom, a chlorine atom or OCF 3
  • R ii191 represents an alkyl group having 1 to 5 carbon atoms
  • X ii191 or X ii192 is preferably a hydrogen atom.
  • X ii193 or X ii194 is a fluorine atom.
  • X ii195 and X ii196 are preferably fluorine atoms.
  • Y ii191 is preferably a fluorine atom.
  • the lower limit of the preferable content of the compound represented by formula (ii-9) with respect to the total amount of the liquid crystal composition of the present invention is 1%, 2%, 4%, 5% 8%, 10%, 13%, 15%, 18%, 20%.
  • the upper limit of the preferred content is 30%, 28%, 25%, 23%, 20%, 18%, 15%, 13%, 10% 8% and 5%.
  • the composition of the liquid crystal composition of the present invention keeps the viscosity low and the response speed is fast, it is preferable to lower the lower limit and lower the upper limit. Furthermore, when a composition that does not easily cause seizure is required, it is preferable to lower the lower limit and lower the upper limit. Further, when it is desired to increase the dielectric anisotropy in order to keep the driving voltage low, it is preferable to increase the upper limit value while increasing the lower limit value.
  • the compounds represented by the general formula (ii-9) used in the liquid crystal composition of the present invention are specifically represented by the formulas (ii-9.1) to (ii-9.12).
  • the lower limit of the preferable content of these compounds with respect to the total amount of the liquid crystal composition of the present invention is 1%, 2%, 4%, 5%, 8%, 10% 13%, 15%, 18%, 20%.
  • the upper limit of the preferred content is 30%, 28%, 25%, 23%, 20%, 18%, 15%, 13%, 10% 8% and 5%.
  • the compound represented by the general formula (iii) according to the present invention is preferably a positive compound (the value of ⁇ is greater than 2).
  • R iii1 is preferably linear or branched, and more preferably linear.
  • R iii1 is preferably an alkyl group having 1 to 8 carbon atoms, an alkenyl group having 2 to 8 carbon atoms, or an alkoxy group having 1 to 8 carbon atoms, and an alkyl group having 1 to 6 carbon atoms.
  • An alkenyl group having 2 to 6 carbon atoms or an alkoxy group having 1 to 6 carbon atoms is more preferable.
  • n iii1 preferably represents 0, 1, 2, or 3, and n iii1 more preferably represents 0, 1, or 2.
  • n iii1 is an integer of 2 or more and there are a plurality of A iii2 , they may be the same or different, and n iii1 is an integer of 2 or more and there are a plurality of Z iii1 They may be the same or different.
  • a K1 and A K2 each independently preferably represent a 1,4-phenylene group, and the hydrogen atoms on the phenylene group are each independently substituted with a fluorine atom. May be. Thereby, (DELTA) n of the whole composition can be improved significantly.
  • Z K1 and Z K2 each independently represent a single bond, —OCH 2 —, —CH 2 O—, —OCF 2 —, —CF 2 O—, or C ⁇ C—. preferable.
  • XK1 and XK3 each independently represent a hydrogen atom or a fluorine atom.
  • Y K2 preferably represents a hydrogen atom, a fluorine atom, a trifluoromethyl group, a trifluoromethoxy group, or a 2,2,2-trifluoroethyl group.
  • the lower limit of the preferable content of the compound represented by the general formula (iii) with respect to the total amount of the liquid crystal composition of the present invention is 1%, 2%, 4%, 5% 8%, 10%, 13%, 15%, 18%, and 20%.
  • the upper limit of the preferable content is 40%, 37%, 35%, 32%, 30%, 28%, 25%, 23%, 20% 18% 15% 13% 10% 10% 8% 5%
  • the compound represented by general formula (iii) is preferably a compound selected from the group of compounds represented by general formula (iii-1), for example.
  • R iii11 represents an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms
  • X iii11 to X iii14 are each independently hydrogen.
  • Y iii11 represents a fluorine atom or OCF 3.
  • the type of the compound used is, for example, one type as one embodiment of the present invention, two types, and three or more types.
  • the lower limit of the preferable content of the compound represented by the formula (iii-1) with respect to the total amount of the liquid crystal composition of the present invention is 1%, 2%, 5%, 8% Yes, 10%, 13%, 15%, 18%, 20%, 22%, 25%, 30%.
  • the upper limit of the preferred content is 30%, 28%, 25%, 23%, 20%, 18%, 15%, 13%, 10% 8% and 5%.
  • the composition of the liquid crystal composition of the present invention keeps the viscosity low and the response speed is fast, it is preferable to lower the lower limit and lower the upper limit. Furthermore, when the composition of the liquid crystal composition of the present invention maintains a high Tni and has a good temperature stability, it is preferable to lower the lower limit and lower the upper limit. Further, when it is desired to increase the dielectric anisotropy in order to keep the driving voltage low, it is preferable to increase the upper limit value while increasing the lower limit value.
  • the compound represented by the general formula (iii-1) is specifically preferably a compound represented by the formula (iii-1.1) to the formula (iii-1.4).
  • a compound represented by iii-1.1) or formula (iii-1.2) is preferred, and a compound represented by formula (iii-1.2) is more preferred. It is also preferred to use the compounds represented by formula (iii-1.1) or formula (iii-1.2) at the same time.
  • the lower limit of the preferable content of these compounds with respect to the total amount of the liquid crystal composition of the present invention is 1%, 2%, 4%, 5%, 8%, 10% 13%, 15%, 18%, 20%.
  • the upper limit of the preferred content is 30%, 28%, 25%, 23%, 20%, 18%, 15%, 13%, 10% 8% and 5%.
  • the compound represented by general formula (iii) is preferably a compound selected from the group of compounds represented by general formula (iii-2), for example.
  • R iii21 represents an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms
  • X iii21 to X iii24 are each independently hydrogen.
  • Y iii21 represents a fluorine atom or OCF 3.
  • the type of the compound used is, for example, one type as one embodiment of the present invention, two types, and three or more types.
  • the lower limit of the preferable content of the compound represented by the formula (iii-2) with respect to the total amount of the liquid crystal composition of the present invention is 1%, 2%, 5%, 8% Yes, 10%, 13%, 15%, 18%, 20%, 22%, 25%, 30%.
  • the upper limit of the preferred content is 30%, 28%, 25%, 23%, 20%, 18%, 15%, 13%, 10% 8% and 5%.
  • the composition of the liquid crystal composition of the present invention keeps the viscosity low and the response speed is fast, it is preferable to lower the lower limit and lower the upper limit. Furthermore, when the composition of the liquid crystal composition of the present invention maintains a high Tni and has a good temperature stability, it is preferable to lower the lower limit and lower the upper limit. Further, when it is desired to increase the dielectric anisotropy in order to keep the driving voltage low, it is preferable to increase the upper limit value while increasing the lower limit value.
  • the compound represented by the general formula (iii-2) is specifically preferably a compound represented by the formula (iii-2.1) to the formula (iii-2.6).
  • a compound represented by iii-2.5) or formula (iii-2.6) is preferred, and a compound represented by formula (iii-2.6) is more preferred. It is also preferred to use the compounds represented by formula (iii-2.5) or formula (iii-2.6) at the same time.
  • the lower limit of the preferable content of these compounds with respect to the total amount of the liquid crystal composition of the present invention is 1%, 2%, 4%, 5%, 8%, 10% 13%, 15%, 18%, 20%.
  • the upper limit of the preferred content is 30%, 28%, 25%, 23%, 20%, 18%, 15%, 13%, 10% 8% and 5%.
  • the compound represented by general formula (iii) is preferably a compound selected from the group of compounds represented by general formula (iii-3), for example.
  • R iii31 represents an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms
  • X iii31 to X iii36 each independently represents hydrogen An atom or a fluorine atom
  • Y iii31 represents a fluorine atom or OCF 3
  • the type of the compound used is, for example, one type as one embodiment of the present invention, two types, and three or more types.
  • the lower limit of the preferable content of the compound represented by the formula (iii-3) with respect to the total amount of the liquid crystal composition of the present invention is 1%, 2%, 5%, 8% Yes, 10%, 13%, 15%, 18%, 20%, 22%, 25%, 30%.
  • the upper limit of the preferred content is 30%, 28%, 25%, 23%, 20%, 18%, 15%, 13%, 10% 8% and 5%.
  • the composition of the liquid crystal composition of the present invention keeps the viscosity low and the response speed is fast, it is preferable to lower the lower limit and lower the upper limit. Furthermore, when the composition of the liquid crystal composition of the present invention maintains a high Tni and has a good temperature stability, it is preferable to lower the lower limit and lower the upper limit. Further, when it is desired to increase the dielectric anisotropy in order to keep the driving voltage low, it is preferable to increase the upper limit value while increasing the lower limit value.
  • the compound represented by the general formula (iii-3) is specifically preferably a compound represented by the formula (iii-3.1) to the formula (iii-3.4).
  • a compound represented by iii-3.1) or formula (iii-3.2) is more preferable. It is also preferred to use the compounds represented by formula (iii-3.1) and formula (iii-3.2) at the same time.
  • the lower limit of the preferable content of these compounds with respect to the total amount of the liquid crystal composition of the present invention is 1%, 2%, 4%, 5%, 8%, 10% 13%, 15%, 18%, 20%.
  • the upper limit of the preferred content is 30%, 28%, 25%, 23%, 20%, 18%, 15%, 13%, 10% 8% and 5%.
  • the compound represented by general formula (iii) is preferably a compound selected from the group of compounds represented by general formula (iii-4), for example.
  • R iii41 represents an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms
  • X iii41 to X iii46 are each independently hydrogen.
  • Y iii41 represents a fluorine atom or OCF 3
  • Z iii41 represents —OCH 2 —, —CH 2 O—, —OCF 2 — or CF 2 O—.
  • the lower limit of the preferable content of the compound represented by the formula (iii-4) with respect to the total amount of the liquid crystal composition of the present invention is 1%, 2%, 5%, 8% Yes, 9%, 10%, 13%, 15%, 18%, 20%, 22%, 25%, 30%.
  • the upper limit of the preferable content is 30%, 28%, 25%, 23%, 20%, 18%, 15%, 13%, 12% 8% and 5%.
  • the composition of the liquid crystal composition of the present invention keeps the viscosity low and the response speed is fast, it is preferable to lower the lower limit and lower the upper limit. Furthermore, when the composition of the liquid crystal composition of the present invention maintains a high Tni and has a good temperature stability, it is preferable to lower the lower limit and lower the upper limit. Further, when it is desired to increase the dielectric anisotropy in order to keep the driving voltage low, it is preferable to increase the upper limit value while increasing the lower limit value.
  • the compound represented by the general formula (iii-4) is specifically preferably a compound represented by the formula (iii-4.1) to the formula (iii-4.18).
  • the compounds represented by iii-4.1), formula (iii-4.2), formula (iii-4.11), and (iii-4.12) are more preferred. It is also preferred to use compounds represented by formula (iii-4.1), formula (iii-4.2), formula (iii-4.11), (iii-4.12) at the same time.
  • the lower limit of the preferable content of these compounds with respect to the total amount of the liquid crystal composition of the present invention is 1%, 2%, 4%, 5%, 8%, 9% 10%, 13%, 15%, 18%, and 20%.
  • the upper limit of the preferable content is 30%, 28%, 25%, 23%, 20%, 18%, 15%, 13%, 12% 8% and 5%.
  • the compound represented by the general formula (iii) is preferably a compound selected from the group of compounds represented by the general formula (iii-5), for example.
  • R iii51 represents an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms
  • X iii51 to X iii56 are each independently hydrogen.
  • An atom or a fluorine atom Y iii51 represents a fluorine atom or OCF 3
  • Z iii51 represents —OCH 2 —, —CH 2 O—, —OCF 2 — or CF 2 O—.
  • the type of the compound used is, for example, one type as one embodiment of the present invention, two types, and three or more types.
  • the lower limit of the preferable content of the compound represented by the formula (iii-5) with respect to the total amount of the liquid crystal composition of the present invention is 1%, 2%, 5%, 8% Yes, 10%, 13%, 15%, 18%, 20%, 22%, 25%, 30%.
  • the upper limit of the preferred content is 30%, 28%, 25%, 23%, 20%, 18%, 15%, 13%, 10% 8% and 5%.
  • the composition of the liquid crystal composition of the present invention keeps the viscosity low and the response speed is fast, it is preferable to lower the lower limit and lower the upper limit. Furthermore, when the composition of the liquid crystal composition of the present invention maintains a high Tni and has a good temperature stability, it is preferable to lower the lower limit and lower the upper limit. Further, when it is desired to increase the dielectric anisotropy in order to keep the driving voltage low, it is preferable to increase the upper limit value while increasing the lower limit value.
  • the compound represented by the general formula (iii-5) is specifically preferably a compound represented by the formula (iii-5.1) to the formula (iii-5.18).
  • Compounds represented by formulas (iii-5.11) to (iii-5.14) are preferred, and compounds represented by formula (iii-5.12) are more preferred.
  • the lower limit of the preferable content of these compounds with respect to the total amount of the liquid crystal composition of the present invention is 1%, 2%, 4%, 5%, 6%, 8% 10%, 13%, 15%, 18%, and 20%.
  • the upper limit of the preferred content is 30%, 28%, 25%, 23%, 20%, 18%, 15%, 13%, 10% 8% and 5%.
  • the compound represented by the general formula (iii) is preferably a compound selected from the group of compounds represented by the general formula (iii-6), for example.
  • R iii61 represents an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms
  • X iii61 to X iii68 are each independently hydrogen.
  • Y iii61 represents a fluorine atom or OCF 3
  • Z iii61 represents a single bond, —OCH 2 —, —CH 2 O—, —OCF 2 —, or CF 2 O—.
  • the lower limit of the preferable content of the compound represented by the formula (iii-6) with respect to the total amount of the liquid crystal composition of the present invention is 1%, 2%, 5%, 8% Yes, 10%, 13%, 15%, 18%, 20%, 22%, 25%, 30%.
  • the upper limit of the preferred content is 30%, 28%, 25%, 23%, 20%, 18%, 15%, 13%, 10% 8% and 5%.
  • the composition of the liquid crystal composition of the present invention keeps the viscosity low and the response speed is fast, it is preferable to lower the lower limit and lower the upper limit. Furthermore, when the composition of the liquid crystal composition of the present invention maintains a high Tni and has a good temperature stability, it is preferable to lower the lower limit and lower the upper limit. Further, when it is desired to increase the dielectric anisotropy in order to keep the driving voltage low, it is preferable to increase the upper limit value while increasing the lower limit value.
  • the compound represented by the general formula (iii-6) is specifically preferably a compound represented by the formula (iii-6.1) to the formula (iii-6.18).
  • Compounds represented by formulas (iii-6.15) to (iii-6.18) are preferred, and compounds represented by formula (iii-6.16) and formula (iii-6.17) are more preferred. It is also preferred to use the compounds represented by formula (iii-6.16) and formula (iii-6.17) at the same time.
  • the lower limit of the preferable content of these compounds with respect to the total amount of the liquid crystal composition of the present invention is 1%, 2%, 4%, 5%, 8%, 10% 13%, 15%, 18%, 20%.
  • the upper limit of the preferred content is 30%, 28%, 25%, 23%, 20%, 18%, 15%, 13%, 10% 8% and 5%.
  • the liquid crystal composition according to the present invention may contain one or more compounds represented by the general formula (L) as necessary.
  • the compound represented by the general formula (L) corresponds to a dielectrically neutral compound ( ⁇ value is ⁇ 2 to 5, preferably ⁇ 2 to 2).
  • R L1 and R L2 each independently represents an alkyl group having 1 to 8 carbon atoms, and one or two or more non-adjacent —CH 2 — in the alkyl group are each independently Optionally substituted by —CH ⁇ CH—, —C ⁇ C—, —O—, —CO—, —COO— or OCO—, OL represents 0, 1, 2 or 3;
  • B L1 , B L2 and B L3 each independently represent (a) a 1,4-cyclohexylene group (one —CH 2 — present in this group or two or more —CH 2 — not adjacent to each other).
  • the compound represented by general formula (L) may be used independently, it can also be used in combination.
  • the types of compounds that can be combined but they are used in appropriate combinations according to desired properties such as solubility at low temperatures, transition temperatures, electrical reliability, and birefringence.
  • the kind of the compound used is, for example, one kind as one embodiment of the present invention.
  • the content of the compound represented by the general formula (L) includes solubility at low temperature, transition temperature, electrical reliability, birefringence, process suitability, dripping marks, and burn-in. Therefore, it is necessary to appropriately adjust according to required performance such as dielectric anisotropy.
  • the lower limit of the preferable content of the compound represented by the formula (L) with respect to the total amount of the liquid crystal composition of the present invention is 1%, 10%, 20%, 30%, 40%, 50%, 55%, 60%, 65%, 70%, 75%, 80%.
  • the upper limit of the preferable content is 95%, 85%, 75%, 65%, 55%, 45%, 35%, and 25%.
  • the above lower limit value is preferably high and the upper limit value is preferably high. Furthermore, when a composition having a high temperature stability and a high temperature stability is required, the above lower limit value is preferably high and the upper limit value is high. Further, when it is desired to increase the dielectric anisotropy in order to keep the driving voltage low, it is preferable that the above lower limit value is lowered and the upper limit value is low.
  • both R L1 and R L2 are preferably alkyl groups, and when importance is placed on lowering viscosity, at least one is preferably an alkenyl group.
  • R L1 and R L2 are each a linear alkyl group having 1 to 5 carbon atoms or a linear carbon atom having 1 to 4 carbon atoms when the ring structure to which R L1 is bonded is a phenyl group (aromatic).
  • a phenyl group aromatic
  • a straight-chain C 1-5 carbon atom is preferred.
  • Alkyl groups, linear alkoxy groups having 1 to 4 carbon atoms and linear alkenyl groups having 2 to 5 carbon atoms are preferred.
  • the compound represented by the general formula (L) according to the present invention is selected from at least one or more compounds selected from the compound groups represented by the following general formula (L-1) to general formula (L-9). Is preferred.
  • the compound represented by the general formula (L) is preferably a compound selected from the group of compounds represented by the general formula (L-1).
  • R L11 and R L12 are each independently a linear alkyl group having 1 to 5 carbon atoms, a linear alkoxy group having 1 to 4 carbon atoms, and a linear carbon atom number
  • the kind of the compound used is, for example, one kind as one embodiment of the present invention, two kinds, three kinds, four kinds, and five kinds or more.
  • the lower limit of the preferable content is 1%, 2%, 3%, 5%, 7%, 10% with respect to the total amount of the liquid crystal composition of the present invention, 15%, 20%, 25%, 30%, 35%, 40%, 45%, 50%, 55%.
  • the upper limit of the preferable content is 95%, 90%, 85%, 80%, 75%, 70% with respect to the total amount of the liquid crystal composition of the present invention, 65%, 60%, 55%, 50%, 45%, 40%, 35%, 30%, 25%.
  • the above lower limit value is preferably high and the upper limit value is preferably high. Further, when a composition having a high Tni of the liquid crystal composition of the present invention and having good temperature stability is required, it is preferable that the above lower limit value is medium and the upper limit value is medium. Further, when it is desired to increase the dielectric anisotropy in order to keep the driving voltage low, it is preferable that the above lower limit value is lowered and the upper limit value is low.
  • the compound represented by the general formula (L-1) is preferably a compound selected from the group of compounds represented by the general formula (L-1-1).
  • the compound represented by the general formula (L-1-1) is a compound selected from the group of compounds represented by the formula (L-1-1.1) to the formula (L-1-1.3).
  • it is a compound represented by formula (L-1-1.2) or formula (L-1-1.3), and in particular, in formula (L-1-1.3) It is preferable that it is a compound represented.
  • the lower limit of the preferable content of the compound represented by the formula (L-1-1.3) with respect to the total amount of the liquid crystal composition of the present invention is 1%, 2%, 3% 5%, 7%, and 10%.
  • the upper limit of the preferable content is 20%, 15%, 13%, 10%, 8%, 7% with respect to the total amount of the liquid crystal composition of the present invention, 6%, 5%, 3%.
  • the compound represented by the general formula (L-1) is preferably a compound selected from the group of compounds represented by the general formula (L-1-2).
  • R L12 represents the same meaning as in general formula (L-1).
  • the lower limit of the preferable content of the compound represented by the formula (L-1-2) with respect to the total amount of the liquid crystal composition of the present invention is 1%, 5%, 10%, 15 %, 20%, and 30%.
  • the upper limit of the preferable content is 60%, 55%, 50%, 45%, 40%, 35% with respect to the total amount of the liquid crystal composition of the present invention, 33% and 30%.
  • the compound represented by the general formula (L-1-2) is a compound selected from the group of compounds represented by the formula (L-1-2.1) to the formula (L-1-2.4).
  • it is a compound represented by the formula (L-1-2.2) to the formula (L-1-2.4).
  • the compound represented by the formula (L-1-2.2) is preferable because the response speed of the liquid crystal composition of the invention is particularly improved.
  • Tni higher than the response speed
  • the content of the compounds represented by formula (L-1-2.3) and formula (L-1-2.4) is not preferably 30% or more in order to improve the solubility at low temperatures.
  • the lower limit of the preferable content of the compound represented by the formula (L-1-2.2) with respect to the total amount of the liquid crystal composition of the present invention is 10%, 15%, and 20%. 25%, 27%, 30%, 35%, and 40%.
  • the upper limit of the preferable content is 60%, 55%, 50%, 45%, 43%, and 40% with respect to the total amount of the liquid crystal composition of the present invention. 38%, 35%, 32%, 30%, 27%, 25%, 22%.
  • the preferred total content of the compound represented by the formula (L-1-1.3) and the compound represented by the formula (L-1-2.2) with respect to the total amount of the liquid crystal composition of the present invention The lower limit values are 10%, 15%, 20%, 25%, 27%, 30%, 35%, and 40%.
  • the upper limit of the preferable content is 60%, 55%, 50%, 45%, 43%, and 40% with respect to the total amount of the liquid crystal composition of the present invention. 38%, 35%, 32%, 30%, 27%, 25%, 22%.
  • the compound represented by the general formula (L-1) is preferably a compound selected from the group of compounds represented by the general formula (L-1-3).
  • R L11 and R L12 represent the same meaning as in general formula (L-1).
  • R L11 and R L12 represent the same meaning as in general formula (L-1).
  • required such as solubility at low temperature, transition temperature, electrical reliability, birefringence.
  • the content of the compound represented by the general formula (L-1-3) includes solubility at low temperature, transition temperature, electrical reliability, birefringence, process suitability, It is necessary to adjust appropriately according to required performance such as dripping marks, image sticking, and dielectric anisotropy.
  • the lower limit of the preferable content of the compound represented by the formula (L-1-3) with respect to the total amount of the liquid crystal composition of the present invention is 1%, 5%, 10%, 15 %, 20%, and 30%.
  • the upper limit of the preferable content is 60%, 55%, 50%, 45%, 40%, 35% with respect to the total amount of the liquid crystal composition of the present invention, 33% and 30%.
  • the compound represented by the general formula (L-1-3) is a compound selected from the group of compounds represented by the formula (L-1-3.1) to the formula (L-1-3.4).
  • it is a compound represented by formula (L-1-3.1), formula (L-1-3.3) or formula (L-1-3.4).
  • the compound represented by the formula (L-1-3.1) is preferable because the response speed of the liquid crystal composition of the invention is particularly improved.
  • it is preferable to use a compound represented by formula (L-1-3.3) or formula (L-1-3.4).
  • the content of the compounds represented by formula (L-1-3.3) and formula (L-1-3.4) is not preferably 20% or more in order to improve the solubility at low temperatures.
  • the lower limit of the preferable content of the compound represented by the formula (L-1-3.1) with respect to the total amount of the liquid crystal composition of the present invention is 1%, 2%, 3% 5%, 7%, and 10%.
  • the upper limit of the preferable content is 20%, 15%, 13%, 10%, 8%, 7% with respect to the total amount of the liquid crystal composition of the present invention, 6%, 5%, 3%.
  • the compound represented by the general formula (L) is preferably a compound selected from the group of compounds represented by the general formula (L-2).
  • R L21 represents an alkyl group having 1 to 5 carbon atoms or an alkenyl group having 2 to 5 carbon atoms
  • R L22 represents an alkyl group having 1 to 5 carbon atoms or an alkenyl group having 4 to 5 carbon atoms
  • the content of the compound represented by the general formula (L-2) is such that solubility at low temperature, transition temperature, electrical reliability, birefringence, process suitability, dropping trace Therefore, it is necessary to adjust appropriately according to required performance such as image sticking and dielectric anisotropy.
  • the lower limit of the preferable content of the compound represented by the formula (L-2) with respect to the total amount of the liquid crystal composition of the present invention is 1%, 2%, 3%, 5% Yes, 7%, 10%.
  • the upper limit of the preferable content is 20%, 15%, 13%, 10%, 8%, 7% with respect to the total amount of the liquid crystal composition of the present invention, 6%, 5%, 3%.
  • the compound represented by the general formula (L-2) is preferably a compound selected from the group of compounds represented by the formulas (L-2.1) to (L-2.6).
  • a compound represented by formula (L-2.3), formula (L-2.4) and formula (L-2.6) is preferred.
  • the compound represented by the general formula (L) is preferably a compound selected from the group of compounds represented by the general formula (L-3).
  • R L31 and R L32 each independently represents an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 4 to 5 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms.
  • R L31 and R L32 each independently represents an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 4 to 5 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms.
  • the content of the compound represented by the general formula (L-3) includes solubility at low temperature, transition temperature, electrical reliability, birefringence, process suitability, dropping trace Therefore, it is necessary to adjust appropriately according to required performance such as image sticking and dielectric anisotropy.
  • the lower limit of the preferable content of the compound represented by the formula (L-3) with respect to the total amount of the liquid crystal composition of the present invention is 1%, 2%, 3%, 5% Yes, 7%, 10%.
  • the upper limit of the preferable content is 25%, 20%, 15%, 13%, 10%, 8% with respect to the total amount of the liquid crystal composition of the present invention, 7%, 6%, 5%, 3%.
  • the effect is high when the content is set to be large.
  • the effect is high when the content is set low.
  • the compound represented by the general formula (L-3) is preferably a compound selected from the group of compounds represented by the formulas (L-3.1) to (L-3.4).
  • a compound represented by the formula (L-3.4) from (L-3.2) is preferable.
  • the compound represented by the general formula (L) is preferably a compound selected from, for example, a compound group represented by the general formula (L-4).
  • R L41 represents an alkyl group having 1 to 5 carbon atoms or an alkenyl group having 2 to 5 carbon atoms
  • R L42 represents an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 4 to 5 carbon atoms, or a carbon atom.
  • the content of the compound represented by the general formula (L-4) includes solubility at low temperature, transition temperature, electrical reliability, birefringence, process suitability, dropping trace Therefore, it is necessary to adjust appropriately according to required performance such as image sticking and dielectric anisotropy.
  • the lower limit of the preferable content of the compound represented by the formula (L-4) with respect to the total amount of the liquid crystal composition of the present invention is 1%, 2%, 3%, 5% Yes, 7%, 10%, 14%, 16%, 20%, 23%, 26%, 30%, 35%, 40% is there.
  • the upper limit of the preferable content of the compound represented by the formula (L-4) with respect to the total amount of the liquid crystal composition of the present invention is 50%, 45%, 40%, 35% Yes, 30%, 20%, 15%, 10%, 5%.
  • the compound represented by the general formula (L-4) is preferably, for example, a compound represented by the formula (L-4.1) to the formula (L-4.3).
  • the formula (L -4.2) Even if it contains a compound represented by formula (L-4.1), it contains both a compound represented by formula (L-4.1) and a compound represented by formula (L-4.2). Or all of the compounds represented by formulas (L-4.1) to (L-4.3) may be included.
  • the lower limit of the preferable content of the compound represented by formula (L-4.1) or formula (L-4.2) with respect to the total amount of the liquid crystal composition of the present invention is 3%, and 5% 7%, 9%, 11%, 12%, 13%, 18%, and 21%.
  • Preferred upper limits are 45%, 40%, 35%, 30%, 25%, 23%, 20%, 18%, 15%, 13%.
  • the amount of both compounds relative to the total amount of the liquid crystal composition of the present invention is 15%, 19%, 24%, and 30%.
  • Preferred upper limits are 45%, 40%, 35%, 30%, 28%, 25%, 23%, 20%, 18%, 15% and 13%.
  • the compound represented by the general formula (L-4) is preferably a compound represented by the formula (L-4.4) to the formula (L-4.6), for example.
  • the formula (L -4.5) contains both the compound represented by formula (L-4.4) and the compound represented by formula (L-4.5). May be.
  • the lower limit of the preferable content of the compound represented by the formula (L-4.4) or the formula (L-4.5) with respect to the total amount of the liquid crystal composition of the present invention is 3%, and 5% 7%, 9%, 11%, 12%, 13%, 18%, and 21%.
  • Preferred upper limits are 45%, 40%, 35%, 30%, 25%, 23%, 20%, 18%, 15%, 13%.
  • the compound represented by the general formula (L-4) is preferably, for example, a compound represented by the formula (L-4.7) to the formula (L-4.10).
  • the compound represented by -4.9) is preferred.
  • the compound represented by the general formula (L) is preferably a compound selected from the group of compounds represented by the general formula (L-5).
  • R L51 represents an alkyl group having 1 to 5 carbon atoms or an alkenyl group having 2 to 5 carbon atoms
  • R L52 represents an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 4 to 5 carbon atoms, or a carbon atom.
  • the content of the compound represented by the general formula (L-5) is such that solubility at low temperature, transition temperature, electrical reliability, birefringence, process suitability, dropping trace Therefore, it is necessary to adjust appropriately according to required performance such as image sticking and dielectric anisotropy.
  • the lower limit of the preferable content of the compound represented by the formula (L-5) with respect to the total amount of the liquid crystal composition of the present invention is 1%, 2%, 3%, 5% Yes, 7%, 10%, 14%, 16%, 20%, 23%, 26%, 30%, 35%, 40% is there.
  • the upper limit of the preferable content of the compound represented by the formula (L-5) with respect to the total amount of the liquid crystal composition of the present invention is 50%, 40%, 35%, 30% Yes, 20%, 15%, 10%, 5%
  • the compound represented by the general formula (L-5) is, for example, the formula (L-5.1) or the formula (L A compound represented by -5.2) is preferred, and a compound represented by formula (L-5.1) is particularly preferred.
  • the lower limit of the preferable content of these compounds with respect to the total amount of the liquid crystal composition of the present invention is 1%, 2%, 3%, 5%, and 7%.
  • the upper limit of the preferable content of these compounds is 20%, 15%, 13%, 10%, 9%, and 8%.
  • the compound represented by the general formula (L-5) is preferably a compound represented by the formula (L-5.3) or the formula (L-5.4), for example.
  • the lower limit of the preferable content of these compounds with respect to the total amount of the liquid crystal composition of the present invention is 1%, 2%, 3%, 5%, and 7%.
  • the upper limit of preferable content of these compounds is 20%, 15%, 13%, 10%, 9%, and 6%.
  • the compound represented by general formula (L-5) is preferably a compound selected from the group of compounds represented by formula (L-5.5) to formula (L-5.7), In particular, the compound represented by the formula (L-5.7) is preferable.
  • the lower limit of the preferable content of these compounds with respect to the total amount of the liquid crystal composition of the present invention is 1%, 2%, 3%, 5%, and 7%.
  • the upper limit of the preferable content of these compounds is 20%, 15%, 13%, 10%, and 9%.
  • the compound represented by the general formula (L) is preferably selected from the group represented by the general formula (L-6).
  • R L61 and R L62 each independently represent an alkyl group having 1 to 5 carbon atoms or an alkenyl group having 2 to 5 carbon atoms
  • X L61 and X L62 each independently represent a hydrogen atom or fluorine Represents an atom.
  • the content of the compound represented by the general formula (L-6) includes solubility at low temperature, transition temperature, electrical reliability, birefringence, process suitability, dropping trace Therefore, it is necessary to adjust appropriately according to required performance such as image sticking and dielectric anisotropy.
  • the lower limit of the preferable content of the compound represented by the formula (L-6) with respect to the total amount of the liquid crystal composition of the present invention is 1%, 2%, 3%, 5% Yes, 7%, 10%, 14%, 16%, 20%, 23%, 26%, 30%, 35%, 40% is there.
  • the upper limit of the preferable content of the compound represented by the formula (L-6) with respect to the total amount of the liquid crystal composition of the present invention is 50%, 45%, 40%, 38% Yes, 35%, 32%, 30%, 28%, 25%, 20%, 15%, 10%, 5%.
  • the compound represented by the general formula (L-6) is preferably a compound represented by the formula (L-6.1) to the formula (L-6.9), for example.
  • the compound represented by the general formula (L-6) is preferably, for example, a compound represented by the formula (L-6.10) to the formula (L-6.25).
  • the lower limit of the preferable content of these compounds (formula (L-6.1) to formula (L-6.25)) with respect to the total amount of the liquid crystal composition of the present invention is 1%, 2% Yes, 3%, 5%, 7%, 10%, 12%.
  • the upper limit of preferable content of these compounds is 30%, 25%, 20%, 15%, 13%, 10%, and 9%.
  • the compound represented by the general formula (L) is preferably a compound selected from the group represented by the general formula (L-7).
  • R L71 and R L72 are each independently an alkyl group having 1 to 5 carbon atoms, an alkenyl group or an alkoxy group having 1 to 4 carbon atoms carbon atoms 2 to 5
  • a L71 and A L72 each independently represents a 1,4-cyclohexylene group or a 1,4-phenylene group, but the hydrogen atoms on A L71 and A L72 may each independently be substituted with a fluorine atom, and Q L71 Represents a single bond or COO-, and X L71 and X L72 each independently represents a fluorine atom or a hydrogen atom, except for the compound represented by formula (i).)
  • limiting in particular in the kind of compound which can be combined It combines according to performance requested
  • the kind of the compound used is, for example, one kind as one embodiment of the present invention, two kinds, three kinds, and four kinds.
  • the content of the compound represented by the general formula (L-7) includes solubility at low temperature, transition temperature, electrical reliability, birefringence, process suitability, dropping trace Therefore, it is necessary to adjust appropriately according to required performance such as image sticking and dielectric anisotropy.
  • the lower limit of the preferable content of the compound represented by the formula (L-7) with respect to the total amount of the liquid crystal composition of the present invention is 1%, 2%, 3%, 5% Yes, 7%, 10%, 14%, 16%, 20%.
  • the upper limit of the preferable content of the compound represented by the formula (L-7) with respect to the total amount of the liquid crystal composition of the present invention is 30%, 25%, 23%, 20% Yes, 18%, 15%, 10%, 5%.
  • liquid crystal composition of the present invention When a high Tni embodiment of the liquid crystal composition of the present invention is desired, it is preferable to increase the content of the compound represented by formula (L-7), and when a low viscosity embodiment is desired, It is preferable to reduce the amount.
  • the compound represented by the general formula (L-7) is preferably a compound represented by the formula (L-7.1) to the formula (L-7.4), and the formula (L-7. It is preferable that it is a compound represented by 2).
  • the compound represented by the general formula (L-7) is preferably a compound represented by the formula (L-7.11) to the formula (L-7.13). It is preferable that it is a compound represented by 11).
  • the compound represented by the general formula (L-7) is a compound represented by the formula (L-7.21) to the formula (L-7.23).
  • a compound represented by formula (L-7.21) is preferable.
  • the compound represented by the general formula (L-7) is preferably a compound represented by the formula (L-7.31) to the formula (L-7.34), and the formula (L-7. 31) or / and a compound represented by the formula (L-7.32).
  • the compound represented by the general formula (L-7) is preferably a compound represented by the formula (L-7.41) to the formula (L-7.44), and the formula (L-7. 41) or / and a compound represented by the formula (L-7.42).
  • the compound represented by the general formula (L-7) as the first component preferably contains at least one or more compounds represented by the following general formula (L-7-1). .
  • R L72 each independently represents an alkyl group having 1 to 10 carbon atoms, an alkenyl group having 2 to 10 carbon atoms, and 1 to 10 carbon atoms. And one group selected from the group consisting of alkoxy groups.
  • L-7-1 From the viewpoint of improving the light resistance, heat resistance or image sticking of the liquid crystal composition, it is preferable to include a compound represented by the general formula (L-7-1).
  • the compound represented by the general formula (1) is particularly preferably a compound represented by the formula (L-7.45) to the formula (L-7.49).
  • the compound represented by the general formula (L) is preferably selected from the group represented by the following general formula (L-8).
  • R L81 and R L82 each independently represent the same meaning as R L1 and R L2 in General Formula (L), and A L81 represents the same meaning or single bond as A L1 in General Formula (L)).
  • each hydrogen atom on A L81 may be independently substituted with a fluorine atom
  • X L81 to X L86 each independently represent a fluorine atom or a hydrogen atom.
  • R L81 and R L82 are each independently an alkyl group having 1 to 5 carbon atoms, an alkenyl group or an alkoxy group having 1 to 4 carbon atoms of 2 to 5 carbon atoms preferably, A L81 is 1, A 4-cyclohexylene group or a 1,4-phenylene group is preferable
  • the hydrogen atoms on A L71 and A L72 may be each independently substituted with a fluorine atom, and the same in the general formula (L-8)
  • the number of fluorine atoms in the ring structure is preferably 0 or 1, and the
  • the kind of the compound used is, for example, one kind as one embodiment of the present invention, two kinds, three kinds, and four kinds.
  • the content of the compound represented by the general formula (L-8) is such that solubility at low temperature, transition temperature, electrical reliability, birefringence, process compatibility, drop mark Therefore, it is necessary to adjust appropriately according to required performance such as image sticking and dielectric anisotropy.
  • the lower limit of the preferable content of the compound represented by the formula (L-8) with respect to the total amount of the liquid crystal composition of the present invention is 1%, 2%, 3%, 5% Yes, 7%, 10%, 14%, 16%, 20%.
  • the upper limit of the preferable content of the compound represented by the formula (L-8) with respect to the total amount of the liquid crystal composition of the present invention is 30%, 25%, 23%, 20% Yes, 18%, 15%, 10%, 5%.
  • liquid crystal composition of the present invention When a high Tni embodiment of the liquid crystal composition of the present invention is desired, it is preferable to increase the content of the compound represented by the formula (L-8), and when a low viscosity embodiment is desired, It is preferable to reduce the amount.
  • the compound represented by the general formula (L-8) is preferably a compound represented by the formula (L-8.1) to the formula (L-8.4), and the formula (L-8. 3), formula (L-8.5), formula (L-8.6), formula (L-8.13), formula (L-8.16) to formula (L-8.18), formula (L)
  • a compound represented by formula (L-8.28) to L-8.23) is more preferable.
  • the compound represented by the general formula (L) is preferably selected from the group represented by the following general formula (L-9).
  • R L91 and R L92 are each independently, represents an alkyl group, an alkenyl group or an alkoxy group having 1 to 4 carbon atoms of 2 to 5 carbon atoms having 1 to 5 carbon atoms.
  • the lower limit of the preferable content of the compound represented by the general formula (L-9) with respect to the total amount of the liquid crystal composition of the present invention is 1%, 2%, 4%, 5% 7%, 9%, 10%, 12%, 15%, and 17%.
  • the upper limit of the preferred content is 30%, 28%, 25%, 23%, 20%, 18%, 15%, 13%, 10% 8% and 5%.
  • the liquid crystal compound having an allyl ether group at the terminal has good characteristics as a component of the liquid crystal composition, but has a problem in reliability.
  • the compound represented by the general formula (L-9) has a remarkable reliability by difluorinating a specific position of the benzene ring having an allyl ether group without impairing the original excellent characteristics of the skeleton. Improve, further improve compatibility, reduce viscosity.
  • the dielectric anisotropy may have a slight positive dielectric anisotropy (5 or less) depending on the type of the side chain group. It is classified as.
  • a positive dielectric anisotropy can be imparted. is there.
  • the compound represented by the general formula (L-9) alone exhibits a liquid crystal phase in the range of 40 to 110 ° C., ⁇ n is about 0.26, the flow viscosity is as low as about 25 mPa ⁇ s, and the dielectric constant Anisotropy is about +4 to 5, and it has very good compatibility when used as a component of a liquid crystal composition.
  • the compound represented by the general formula (L-9) used in the liquid crystal composition of the present invention is specifically represented by the formula (L-9.1) to the formula (L-9.24).
  • the compounds represented by formula (L-9.5), formula (L-9.6), formula (L-9.13) and formula (L-9.14) are particularly preferable. It is preferable to contain.
  • the lower limit of the preferable content of these compounds with respect to the total amount of the liquid crystal composition of the present invention is 1%, 2%, 4%, 5%, 6%, 7% 8%, 9%, 10%, 13%, 15%, 18%, 20%.
  • the upper limit of the preferred content is 30%, 28%, 25%, 23%, 20%, 18%, 15%, 13%, 10% 8% and 5%.
  • the liquid crystal composition according to the present invention preferably contains one or more compounds represented by the general formula (J) as necessary. These compounds correspond to dielectrically positive compounds ( ⁇ is greater than 2).
  • R J1 represents an alkyl group having 1 to 8 carbon atoms, and one or two or more non-adjacent —CH 2 — in the alkyl group are each independently —CH ⁇ CH—, — Optionally substituted by C ⁇ C—, —O—, —CO—, —COO— or OCO—, n J1 represents 0, 1, 2, 3 or 4;
  • a J1 , A J2 and A J3 are each independently (A) 1,4-cyclohexylene group (this is present in the group one -CH 2 - or non-adjacent two or more -CH 2 - may be replaced by -O-.)
  • a group (a), a group (b) and a group (c) are each independently a cyano group, a fluorine atom, a chlorine atom, a methyl group, a trifluoromethyl group or a trifluoro group.
  • Z J1 and Z J2 are each independently a single bond, —CH 2 CH 2 —, — (CH 2 ) 4 —, —OCH 2 —, —CH 2 O—, —OCF 2 —, —CF 2 O—, Represents —COO—, —OCO— or C ⁇ C— when n J1 is 2, 3 or 4 and a plurality of A J2 are present, they may be the same or different; n J1 is 2, 3 or 4 and a plurality of Z J1 is present If they are 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, a trifluoromethoxy group or a 2,2,2-trifluoroethyl group, The compounds represented by (i), (ii), (iii)
  • R J1 represents an alkyl group having 1 to 8 carbon atoms, an alkoxy group having 1 to 8 carbon atoms, an alkenyl group having 2 to 8 carbon atoms, or alkenyloxy having 2 to 8 carbon atoms.
  • a group having 1 to 5 carbon atoms, an alkoxy group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms or an alkenyloxy group having 2 to 5 carbon atoms is preferable.
  • An alkyl group having 1 to 5 carbon atoms or an alkenyl group having 2 to 5 carbon atoms is more preferable, an alkyl group having 2 to 5 carbon atoms or an alkenyl group having 2 to 3 carbon atoms is more preferable, and an alkenyl group having 3 carbon atoms. (Propenyl group) is particularly preferred.
  • R J1 is preferably an alkyl group when emphasizing reliability, and is preferably an alkenyl group when emphasizing a decrease in viscosity.
  • the ring structure to which it is bonded is a phenyl group (aromatic)
  • An alkenyl group having 4 to 5 atoms is preferable
  • the ring structure to which the alkenyl group is bonded is a saturated ring structure such as cyclohexane, pyran and dioxane
  • a linear alkoxy group having 1 to 4 carbon atoms and a straight chain alkenyl group having 2 to 5 carbon atoms are preferred.
  • the total number of carbon atoms and oxygen atoms, if present is preferably 5 or less, and is preferably linear.
  • the alkenyl group is preferably selected from groups represented by any of the formulas (R1) to (R5). (The black dot in each formula represents the carbon atom in the ring structure to which the alkenyl group is bonded.)
  • a J1 , A J2 and A J3 are each preferably aromatic when it is required to independently increase ⁇ n, and preferably aliphatic to improve the response speed.
  • Z J1 and Z J2 each independently preferably represent —CH 2 O—, —OCH 2 —, —CF 2 O—, —CH 2 CH 2 —, —CF 2 CF 2 — or a single bond, OCH 2 —, —CF 2 O—, —CH 2 CH 2 — or a single bond is more preferred, and —OCH 2 —, —CF 2 O— or a single bond is particularly preferred.
  • X J1 is preferably a fluorine atom or a trifluoromethoxy group, and more preferably a fluorine atom.
  • n J1 is preferably 0, 1, 2 or 3, preferably 0, 1 or 2, preferably 0 or 1 when emphasizing the improvement of ⁇ , and preferably 1 or 2 when emphasizing Tni. .
  • the types of compounds that can be combined are used in combination according to desired properties such as solubility at low temperatures, transition temperatures, electrical reliability, and birefringence.
  • desired properties such as solubility at low temperatures, transition temperatures, electrical reliability, and birefringence.
  • the content of the compound represented by the general formula (J) includes solubility at low temperature, transition temperature, electrical reliability, birefringence, process suitability, dripping marks, and burn-in. Therefore, it is necessary to appropriately adjust according to required performance such as dielectric anisotropy.
  • the lower limit of the preferable content of the compound represented by the general formula (J) with respect to the total amount of the liquid crystal composition of the present invention is 1%, 10%, 20%, 30%. , 40%, 50%, 55%, 60%, 65%, 70%, 75%, and 80%.
  • the upper limit of the preferable content is, for example, 95%, 85%, 75%, 65%, and 55% with respect to the total amount of the liquid crystal composition of the present invention. 45%, 35%, 25%.
  • the composition of the liquid crystal composition of the present invention keeps the viscosity low and the response speed is fast, it is preferable to lower the lower limit and lower the upper limit. Furthermore, when the composition of the liquid crystal composition of the present invention maintains a high Tni and has a good temperature stability, it is preferable to lower the lower limit and lower the upper limit. Further, when it is desired to increase the dielectric anisotropy in order to keep the driving voltage low, it is preferable to increase the upper limit value while increasing the lower limit value.
  • R J1 is preferably an alkyl group when emphasizing reliability, and is preferably an alkenyl group when emphasizing a decrease in viscosity.
  • the compound represented by the general formula (J) is preferably a compound represented by the general formula (M).
  • the liquid crystal composition of the present invention preferably contains one or more compounds represented by formula (M). These compounds correspond to dielectrically positive compounds ( ⁇ is greater than 2).
  • R M1 represents an alkyl group having 1 to 8 carbon atoms, and one or two or more non-adjacent —CH 2 — in the alkyl group are each independently —CH ⁇ CH—, — Optionally substituted by C ⁇ C—, —O—, —CO—, —COO— or OCO—, PM represents 0, 1, 2, 3 or 4;
  • C M1 and C M2 are each independently (D) 1,4-cyclohexylene group (the one present in the group -CH 2 - or 2 nonadjacent or more -CH 2 - may be replaced by -O- or S- )
  • 1,4-phenylene group one —CH ⁇ present in the group or two or more —CH ⁇ not adjacent to each other may be replaced by —N ⁇ ).
  • a hydrogen atom on the group (d) and the group (e) may be independently substituted with a cyano group, a fluorine atom or a chlorine atom
  • K M1 and K M2 are each independently a single bond, —CH 2 CH 2 —, — (CH 2 ) 4 —, —OCH 2 —, —CH 2 O—, —OCF 2 —, —CF 2 O—, Represents —COO—, —OCO— or C ⁇ C—
  • K 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
  • limiting in particular in the kind of compound which can be combined It uses combining according to desired performance, such as solubility at low temperature, transition temperature, electrical reliability, birefringence.
  • desired performance such as solubility at low temperature, transition temperature, electrical reliability, birefringence.
  • the content of the compound represented by the general formula (M) is low temperature solubility, transition temperature, electrical reliability, birefringence, process suitability, dripping marks, image sticking. Therefore, it is necessary to appropriately adjust according to required performance such as dielectric anisotropy.
  • the lower limit of the preferable content of the compound represented by the formula (M) with respect to the total amount of the liquid crystal composition of the present invention is 1%, 10%, 20%, 30%, 40%, 50%, 55%, 60%, 65%, 70%, 75%, 80%.
  • the upper limit of the preferable content is, for example, 95%, 85%, 75%, 65%, and 55% with respect to the total amount of the liquid crystal composition of the present invention. 45%, 35%, 25%.
  • the composition of the liquid crystal composition of the present invention keeps the viscosity low and the response speed is fast, it is preferable to lower the lower limit and lower the upper limit. Furthermore, when the composition of the liquid crystal composition of the present invention maintains a high Tni and has a good temperature stability, it is preferable to lower the lower limit and lower the upper limit. Further, when it is desired to increase the dielectric anisotropy in order to keep the driving voltage low, it is preferable to increase the upper limit value while increasing the lower limit value.
  • R M1 is preferably an alkyl group when emphasizing reliability, and is preferably an alkenyl group when emphasizing a decrease in viscosity.
  • R M1 represents a linear alkyl group having 1 to 5 carbon atoms or a linear alkoxy group having 1 to 4 carbon atoms when the ring structure to which R M1 is bonded is a phenyl group (aromatic).
  • an alkenyl group having 4 to 5 carbon atoms and when the ring structure to which the alkenyl group is bonded is a saturated ring structure such as cyclohexane, pyran and dioxane, a linear alkyl group having 1 to 5 carbon atoms, A straight-chain alkoxy group having 1 to 4 carbon atoms and a straight-chain alkenyl group having 2 to 5 carbon atoms are preferred.
  • the compound represented by the general formula (M) preferably has no chlorine atom in the molecule when the chemical stability of the composition is required. Further, the compound having a chlorine atom in the liquid crystal composition is preferably 5% or less, preferably 3% or less, preferably 1% or less, preferably 0.5% or less, It is preferable not to contain substantially. “Substantially not contained” means that only a compound containing a chlorine atom unintentionally enters the composition, such as a compound produced as an impurity during the production of the compound.
  • the compound represented by the general formula (M) is preferably, for example, a compound selected from the group of compounds represented by the general formula (M-1).
  • R M11 represents an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms
  • X M11 to X M15 each independently represents hydrogen.
  • An atom or a fluorine atom is represented, and Y M11 represents a fluorine atom or OCF 3.
  • the type of the compound used is, for example, one type as one embodiment of the present invention, two types, and three or more types.
  • the lower limit of the preferable content of the compound represented by the formula (M-1) with respect to the total amount of the liquid crystal composition of the present invention is 1%, 2%, 5%, 8% Yes, 10%, 13%, 15%, 18%, 20%, 22%, 25%, 30%.
  • the upper limit of the preferred content is 30%, 28%, 25%, 23%, 20%, 18%, 15%, 13%, 10% 8% and 5%.
  • the composition of the liquid crystal composition of the present invention keeps the viscosity low and the response speed is fast, it is preferable to lower the lower limit and lower the upper limit. Furthermore, when the composition of the liquid crystal composition of the present invention maintains a high Tni and has a good temperature stability, it is preferable to lower the lower limit and lower the upper limit. Further, when it is desired to increase the dielectric anisotropy in order to keep the driving voltage low, it is preferable to increase the upper limit value while increasing the lower limit value.
  • the compound represented by the general formula (M-1) is specifically preferably a compound represented by the formula (M-1.1) to the formula (M-1.4).
  • a compound represented by M-1.1) or formula (M-1.2) is preferred, and a compound represented by formula (M-1.2) is more preferred. It is also preferred to use the compounds represented by formula (M-1.1) or formula (M-1.2) at the same time.
  • the lower limit of the preferable content of the compound represented by the formula (M-1.1) with respect to the total amount of the liquid crystal composition of the present invention is 1%, 2%, 5%, 6 %.
  • the upper limit of the preferable content is 15%, 13%, 10%, 8%, and 5%.
  • the lower limit of the preferable content of the compound represented by the formula (M-1.2) with respect to the total amount of the liquid crystal composition of the present invention is 1%, 2%, 5%, 6 %.
  • the upper limit of the preferable content is 30%, 25%, 23%, 20%, 18%, 15%, 13%, 10%, 8% It is.
  • the lower limit of the preferable total content of the compounds represented by formula (M-1.1) and formula (M-1.2) with respect to the total amount of the liquid crystal composition of the present invention is 1%, 2%, 5% and 6%.
  • the upper limit of the preferable content is 30%, 25%, 23%, 20%, 18%, 15%, 13%, 10%, 8% It is.
  • the compound represented by the general formula (M) is preferably a compound selected from the group of compounds represented by the general formula (M-2), for example.
  • R M21 represents an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms
  • X M21 and X M22 each independently represent hydrogen
  • An atom or a fluorine atom is represented
  • Y M21 represents a fluorine atom, a chlorine atom, or OCF 3.
  • the lower limit of the preferable content of the compound represented by the formula (M-1) with respect to the total amount of the liquid crystal composition of the present invention is 1%, 2%, 5%, 8% Yes, 10%, 13%, 15%, 18%, 20%, 22%, 25%, 30%.
  • the upper limit of the preferred content is 30%, 28%, 25%, 23%, 20%, 18%, 15%, 13%, 10% 8% and 5%.
  • the composition of the liquid crystal composition of the present invention keeps the viscosity low and the response speed is fast, it is preferable to lower the lower limit and lower the upper limit. Furthermore, when the composition of the liquid crystal composition of the present invention is required to maintain a high Tni and hardly burn-in, it is preferable to lower the lower limit and lower the upper limit. Further, when it is desired to increase the dielectric anisotropy in order to keep the driving voltage low, it is preferable to increase the upper limit value while increasing the lower limit value.
  • the compound represented by the general formula (M-2) is preferably a compound represented by the formula (M-2.1) to the formula (M-2.5).
  • a compound represented by 3) or / and formula (M-2.5) is preferred.
  • the lower limit of the preferable content of the compound represented by the formula (M-2.2) with respect to the total amount of the liquid crystal composition of the present invention is 1%, 2%, 5%, %.
  • the upper limit of the preferable content is 15%, 13%, 10%, 8%, and 5%.
  • the lower limit of the preferable content of the compound represented by the formula (M-2.3) with respect to the total amount of the liquid crystal composition of the present invention is 1%, 2%, 5%, 6 %.
  • the upper limit of the preferable content is 30%, 25%, 23%, 20%, 18%, 15%, 13%, 10%, 8% It is.
  • the lower limit of the preferable content of the compound represented by the formula (M-2.5) with respect to the total amount of the liquid crystal composition of the present invention is 1%, 2%, 5%, 6 %.
  • the upper limit of the preferable content is 30%, 25%, 23%, 20%, 18%, 15%, 13%, 10%, 8% It is.
  • the lower limit of the preferable total content of the compounds represented by formulas (M-2.2), (M-2.3) and formula (M-2.5) with respect to the total amount of the liquid crystal composition of the present invention The values are 1%, 2%, 5% and 6%.
  • the upper limit of the preferable content is 30%, 25%, 23%, 20%, 18%, 15%, 13%, 10%, 8% It is.
  • the content is preferably 1% or more, more preferably 5% or more, further preferably 8% or more, further preferably 10% or more, and more preferably 14% or more with respect to the total amount of the liquid crystal composition of the present invention. 16% or more is particularly preferable.
  • the maximum ratio is preferably limited to 30% or less, more preferably 25% or less, more preferably 22% or less, and more preferably 20%. Less than is particularly preferred.
  • the compound represented by the general formula (M) used in the liquid crystal composition of the present invention is preferably a compound represented by the general formula (M-3).
  • R M31 represents an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms
  • X M31 to X M36 are each independently hydrogen.
  • An atom or a fluorine atom is represented, and Y M31 represents a fluorine atom, a chlorine atom or OCF 3.
  • Y M31 represents a fluorine atom, a chlorine atom or OCF 3.
  • the content of the compound represented by the general formula (M-3) is an upper limit and a lower limit for each embodiment in consideration of properties such as solubility at low temperature, transition temperature, electrical reliability, and birefringence. There is a value.
  • the lower limit of the preferable content of the compound represented by the formula (M-3) with respect to the total amount of the liquid crystal composition of the present invention is 1%, 2%, 4%, 5% Yes, 8%, 10%, 13%, 15%, 18%, 20%.
  • the upper limit of the preferable content is 20%, 18%, 15%, 13%, 10%, 8%, and 5%.
  • the compound represented by the general formula (M-3) used in the liquid crystal composition of the present invention is specifically represented by the formula (M-3.1) to the formula (M-3.4).
  • the lower limit of the preferable content of the compound represented by the formula (M-3.1) with respect to the total amount of the liquid crystal composition of the present invention is 1%, 2%, 4%, 5% %, 8%, 10%, 13%, 15%, 18%, and 20%.
  • the upper limit of the preferable content is 20%, 18%, 15%, 13%, 10%, 8%, and 5%.
  • the lower limit of the preferable content of the compound represented by the formula (M-3.2) with respect to the total amount of the liquid crystal composition of the present invention is 1%, 2%, 4%, 5% %, 8%, 10%, 13%, 15%, 18%, and 20%.
  • the upper limit of the preferable content is 20%, 18%, 15%, 13%, 10%, 8%, and 5%.
  • the lower limit value of the total content of the compounds represented by formula (M-3.1) and formula (M-3.2) with respect to the total amount of the liquid crystal composition of the present invention is 1%, 2%, 4%, 5%, 8%, 10%, 13%, 15%, 18%, 20%.
  • the upper limit of the preferable content is 20%, 18%, 15%, 13%, 10%, 8%, and 5%.
  • the compound represented by the general formula (M) is preferably a compound selected from the group represented by the general formula (M-4).
  • R M41 represents an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms
  • X M41 to X M48 are each independently fluorine.
  • Y M41 represents a fluorine atom, a chlorine atom or OCF 3.
  • the content of the compound represented by the general formula (M-4) is an upper limit and a lower limit for each embodiment in consideration of properties such as solubility at low temperatures, transition temperature, electrical reliability, and birefringence. There is a value.
  • the lower limit of the preferable content of the compound represented by the formula (M-4) with respect to the total amount of the liquid crystal composition of the present invention is 1%, 2%, 4%, 5% Yes, 8%, 10%, 13%, 15%, 18%, 20%.
  • the upper limit of the preferred content is 30%, 28%, 25%, 23%, 20%, 18%, 15%, 13%, 10% 8% and 5%.
  • the liquid crystal composition of the present invention When used for a liquid crystal display device having a small cell gap, it is suitable to increase the content of the compound represented by the general formula (M-4). When used for a liquid crystal display element having a low driving voltage, it is suitable to increase the content of the compound represented by the general formula (M-4). Further, when used for a liquid crystal display element used in a low temperature environment, it is suitable to reduce the content of the compound represented by the general formula (M-4). In the case of a liquid crystal composition used for a liquid crystal display device having a high response speed, it is suitable to reduce the content of the compound represented by the general formula (M-4).
  • the compound represented by the general formula (M-4) used in the liquid crystal composition of the present invention is specifically represented by the formula (M-4.1) to the formula (M-4.4).
  • the compound represented by the general formula (M) is preferably a compound represented by the general formula (M-5).
  • R M51 represents an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms
  • X M51 and X M52 are each independently hydrogen. represents an atom or a fluorine atom
  • Y M51 represents a fluorine atom, a chlorine atom or OCF 3.
  • the lower limit of the preferable content of the compound represented by the formula (M-5) with respect to the total amount of the liquid crystal composition of the present invention is 1%, 2%, 5%, 8% Yes, 10%, 13%, 15%, 18%, 20%, 22%, 25%, 30%.
  • the upper limit of the preferable content is 50%, 45%, 40%, 35%, 33%, 30%, 28%, 25%, 23% 20%, 18%, 15%, 13%, 10%, 8%, 5%.
  • the composition of the liquid crystal composition of the present invention keeps the viscosity low and the response speed is fast, it is preferable to lower the lower limit and lower the upper limit. Furthermore, when the composition of the liquid crystal composition of the present invention is required to maintain a high Tni and hardly burn-in, it is preferable to lower the lower limit and lower the upper limit. Further, when it is desired to increase the dielectric anisotropy in order to keep the driving voltage low, it is preferable to increase the upper limit value while increasing the lower limit value.
  • the compound represented by the general formula (M-5) is preferably a compound represented by the formula (M-5.1) to the formula (M-5.4), and the formula (M-5.
  • a compound represented by formula (M-5.4) is preferable.
  • the lower limit of the preferable content of these compounds with respect to the total amount of the liquid crystal composition of the present invention is 1%, 2%, 5%, 8%, 10%, 13% And 15%.
  • the upper limit of the preferred content is 30%, 28%, 25%, 23%, 20%, 18%, 15%, 13%, 10% 8% and 5%.
  • the compound represented by the general formula (M-5) is preferably a compound represented by the formula (M-5.11) to the formula (M-5.17), and the formula (M-5. 11), a compound represented by formula (M-5.13) and formula (M-5.17) is preferable.
  • the lower limit of the preferable content of these compounds with respect to the total amount of the liquid crystal composition of the present invention is 1%, 2%, 5%, 8%, 10%, 13% And 15%.
  • the upper limit of the preferred content is 30%, 28%, 25%, 23%, 20%, 18%, 15%, 13%, 10% 8% and 5%.
  • the compound represented by the general formula (M-5) is preferably a compound represented by the formula (M-5.21) to the formula (M-5.28), and the formula (M-5. 21), a compound represented by formula (M-5.22), formula (M-5.23) and formula (M-5.25).
  • the lower limit of the preferable content of these compounds with respect to the total amount of the liquid crystal composition of the present invention is 1%, 2%, 5%, 8%, 10%, 13% 15%, 18%, 20%, 22%, 25%, 30%.
  • the upper limit of the preferable content is 40%, 35%, 33%, 30%, 28%, 25%, 23%, 20%, 18% 15% 13% 10% 8% 5%
  • the compound represented by the general formula (M) is preferably a compound represented by the general formula (M-6).
  • R M61 represents an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms
  • X M61 to X M64 each independently represents fluorine.
  • Y M61 represents a fluorine atom, a chlorine atom or OCF 3.
  • the lower limit of the preferable content of the compound represented by the formula (M-6) with respect to the total amount of the liquid crystal composition of the present invention is 1%, 2%, 4%, 5% Yes, 8%, 10%, 13%, 15%, 18%, 20%.
  • the upper limit of the preferred content is 30%, 28%, 25%, 23%, 20%, 18%, 15%, 13%, 10% 8% and 5%.
  • the liquid crystal composition of the present invention When used for a liquid crystal display device having a low driving voltage, it is suitable to increase the content of the compound represented by the general formula (M-6). In the case of a liquid crystal composition used for a liquid crystal display device having a high response speed, it is suitable to reduce the content of the compound represented by the general formula (M-6).
  • the compound represented by the general formula (M-6) is specifically preferably a compound represented by the formula (M-6.1) to the formula (M-6.4). It is preferable to contain a compound represented by M-6.2) and formula (M-6.4).
  • the lower limit of the preferable content of these compounds with respect to the total amount of the liquid crystal composition of the present invention is 1%, 2%, 4%, 5%, 8%, 10% 13%, 15%, 18%, 20%.
  • the upper limit of the preferred content is 30%, 28%, 25%, 23%, 20%, 18%, 15%, 13%, 10% 8% and 5%.
  • the compound represented by the general formula (M-6) is specifically preferably a compound represented by the formula (M-6.11) to the formula (M-6.14). It is preferable to contain a compound represented by M-6.12) and formula (M-6.14).
  • the lower limit of the preferable content of these compounds with respect to the total amount of the liquid crystal composition of the present invention is 1%, 2%, 4%, 5%, 8%, 10% 13%, 15%, 18%, 20%.
  • the upper limit of the preferred content is 30%, 28%, 25%, 23%, 20%, 18%, 15%, 13%, 10% 8% and 5%.
  • the compound represented by the general formula (M-6) is specifically preferably a compound represented by the formula (M-6.21) to the formula (M-6.24). It is preferable to contain a compound represented by M-6.21), formula (M-6.22) and formula (M-6.24).
  • the lower limit of the preferable content of these compounds with respect to the total amount of the liquid crystal composition of the present invention is 1%, 2%, 4%, 5%, 8%, 10% 13%, 15%, 18%, 20%.
  • the upper limit of the preferred content is 30%, 28%, 25%, 23%, 20%, 18%, 15%, 13%, 10% 8% and 5%.
  • the compound represented by the general formula (M-6) is specifically preferably a compound represented by the formula (M-6.31) to the formula (M-6.34). Among them, it is preferable to contain a compound represented by formula (M-6.31) or formula (M-6.32).
  • the lower limit of the preferable content of these compounds with respect to the total amount of the liquid crystal composition of the present invention is 1%, 2%, 4%, 5%, 8%, 10% 13%, 15%, 18%, 20%.
  • the upper limit of the preferred content is 30%, 28%, 25%, 23%, 20%, 18%, 15%, 13%, 10% 8% and 5%.
  • the compound represented by the general formula (M-6) is specifically preferably a compound represented by the formula (M-6.41) to the formula (M-6.44). It is preferable to contain a compound represented by M-6.42).
  • the lower limit of the preferable content of these compounds with respect to the total amount of the liquid crystal composition of the present invention is 1%, 2%, 4%, 5%, 8%, 10% 13%, 15%, 18%, 20%.
  • the upper limit of the preferred content is 30%, 28%, 25%, 23%, 20%, 18%, 15%, 13%, 10% 8% and 5%.
  • the compound represented by the general formula (M) is preferably a compound selected from the group of compounds represented by the general formula (M-7).
  • X M71 to X M76 each independently represents a fluorine atom or a hydrogen atom, and R M71 represents an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms, or 1 to 4 represents an alkoxy group, and Y M71 represents a fluorine atom or OCF 3.
  • R M71 represents an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms, or 1 to 4 represents an alkoxy group
  • Y M71 represents a fluorine atom or OCF 3.
  • the content of the compound represented by the general formula (M-7) is an upper limit and a lower limit for each embodiment in consideration of properties such as solubility at low temperatures, transition temperature, electrical reliability, and birefringence. There is a value.
  • the lower limit of the preferable content of the compound represented by the formula (M-7) with respect to the total amount of the liquid crystal composition of the present invention is 1%, 2%, 4%, 5% Yes, 8%, 10%, 13%, 15%, 18%, 20%.
  • the upper limit of the preferred content is 30%, 28%, 25%, 23%, 20%, 18%, 15%, 13%, 10% 8% and 5%.
  • the liquid crystal composition of the present invention When used for a liquid crystal display device having a small cell gap, it is suitable to increase the content of the compound represented by the general formula (M-7). When used for a liquid crystal display element with a low driving voltage, it is suitable to increase the content of the compound represented by the general formula (M-7). In addition, when used for a liquid crystal display element used in a low temperature environment, it is suitable to reduce the content of the compound represented by the general formula (M-7). In the case of a liquid crystal composition used for a liquid crystal display device having a high response speed, it is suitable to reduce the content of the compound represented by the general formula (M-7).
  • the compound represented by the general formula (M-7) is preferably a compound represented by the formula (M-7.1) to the formula (M-7.4), and the formula (M-7. It is preferable that it is a compound represented by 2).
  • the lower limit of the preferable content of these compounds with respect to the total amount of the liquid crystal composition of the present invention is 1%, 2%, 4%, 5%, 8%, 10% 13%, 15%, 18%, 20%.
  • the upper limit of the preferred content is 30%, 28%, 25%, 23%, 20%, 18%, 15%, 13%, 10% 8% and 5%.
  • the compound represented by the general formula (M-7) is preferably a compound represented by the formula (M-7.11) to the formula (M-7.14), and the formula (M-7. 11) and a compound represented by the formula (M-7.12) are preferable.
  • the lower limit of the preferable content of these compounds with respect to the total amount of the liquid crystal composition of the present invention is 1%, 2%, 4%, 5%, 8%, 10% 13%, 15%, 18%, 20%.
  • the upper limit of the preferred content is 30%, 28%, 25%, 23%, 20%, 18%, 15%, 13%, 10% 8% and 5%.
  • the compound represented by the general formula (M-7) is preferably a compound represented by the formula (M-7.21) to the formula (M-7.24). 21) and a compound represented by the formula (M-7.22) are preferable.
  • the lower limit of the preferable content of these compounds with respect to the total amount of the liquid crystal composition of the present invention is 1%, 2%, 4%, 5%, 8%, 10% 13%, 15%, 18%, 20%.
  • the upper limit of the preferred content is 30%, 28%, 25%, 23%, 20%, 18%, 15%, 13%, 10% 8% and 5%.
  • the compound represented by the general formula (M) is preferably a compound represented by the general formula (M-8).
  • 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
  • R M81 represents an alkyl group having 1 to 5 carbon atoms
  • a M81 and A M82 each independently represents a 1,4-cyclohexylene group, a 1,4-phenylene group, or
  • the hydrogen atom on the 1,4-phenylene group may be substituted with a fluorine atom.
  • the lower limit of the preferable content of the compound represented by formula (M-8) with respect to the total amount of the liquid crystal composition of the present invention is 1%, 2%, 4%, 5% 8%, 10%, 13%, 15%, 18%, 20%.
  • the upper limit of the preferred content is 30%, 28%, 25%, 23%, 20%, 18%, 15%, 13%, 10% 8% and 5%.
  • the composition of the liquid crystal composition of the present invention keeps the viscosity low and the response speed is fast, it is preferable to lower the lower limit and lower the upper limit. Furthermore, when a composition that does not easily cause seizure is required, it is preferable to lower the lower limit and lower the upper limit. Further, when it is desired to increase the dielectric anisotropy in order to keep the driving voltage low, it is preferable to increase the upper limit value while increasing the lower limit value.
  • the compound represented by the general formula (M-8) used in the liquid crystal composition of the present invention is specifically represented by the formula (M-8.1) to the formula (M-8.4).
  • the lower limit of the preferable content of these compounds with respect to the total amount of the liquid crystal composition of the present invention is 1%, 2%, 4%, 5%, 8%, 10% 13%, 15%, 18%, 20%.
  • the upper limit of the preferred content is 30%, 28%, 25%, 23%, 20%, 18%, 15%, 13%, 10% 8% and 5%.
  • the compound represented by formula (M-8) used in the liquid crystal composition of the present invention is specifically represented by formula (M-8.11) to formula (M-8.14).
  • the lower limit of the preferable content of these compounds with respect to the total amount of the liquid crystal composition of the present invention is 1%, 2%, 4%, 5%, 8%, 10% 13%, 15%, 18%, 20%.
  • the upper limit of the preferred content is 30%, 28%, 25%, 23%, 20%, 18%, 15%, 13%, 10% 8% and 5%.
  • the compound represented by the general formula (M-8) used in the liquid crystal composition of the present invention is specifically represented by the formula (M-8.21) to the formula (M-8.24). It is preferable to contain a compound represented by the formula (M-8.22).
  • the lower limit of the preferable content of these compounds with respect to the total amount of the liquid crystal composition of the present invention is 1%, 2%, 4%, 5%, 8%, 10% 13%, 15%, 18%, 20%.
  • the upper limit of the preferred content is 30%, 28%, 25%, 23%, 20%, 18%, 15%, 13%, 10% 8% and 5%.
  • the compound represented by formula (M-8) used in the liquid crystal composition of the present invention is specifically represented by formula (M-8.31) to formula (M-8.34). Among them, it is preferable to contain a compound represented by the formula (M-8.32).
  • the lower limit of the preferable content of these compounds with respect to the total amount of the liquid crystal composition of the present invention is 1%, 2%, 4%, 5%, 8%, 10% 13%, 15%, 18%, 20%.
  • the upper limit of the preferred content is 30%, 28%, 25%, 23%, 20%, 18%, 15%, 13%, 10% 8% and 5%.
  • the compound represented by the general formula (M-8) used in the liquid crystal composition of the present invention is specifically represented by the formula (M-8.41) to the formula (M-8.44). It is preferable to contain a compound represented by the formula (M-8.42).
  • the lower limit of the preferable content of these compounds with respect to the total amount of the liquid crystal composition of the present invention is 1%, 2%, 4%, 5%, 8%, 10% 13%, 15%, 18%, 20%.
  • the upper limit of the preferred content is 30%, 28%, 25%, 23%, 20%, 18%, 15%, 13%, 10% 8% and 5%.
  • the compound represented by the general formula (M-8) used in the liquid crystal composition of the present invention is specifically represented by the formula (M-8.51) to the formula (M-8.54). It is preferable to contain a compound represented by the formula (M-8.52).
  • the lower limit of the preferable content of these compounds with respect to the total amount of the liquid crystal composition of the present invention is 1%, 2%, 4%, 5%, 8%, 10% 13%, 15%, 18%, 20%.
  • the upper limit of the preferred content is 30%, 28%, 25%, 23%, 20%, 18%, 15%, 13%, 10% 8% and 5%.
  • the lower limit of the preferable total content of the compounds represented by general formula (i), general formula (ii) and general formula (iii) with respect to the total amount of the liquid crystal composition of the present invention is 70%. 75%, 78%, 80%, 88%, 90%, 93%, 94%, 95%, 96%, 97%, 98% %, 99%, and 100%.
  • the upper limit of the preferable content is 100%, 99%, 98%, 95%, 90%.
  • the preferred total content of the compounds represented by general formula (i), general formula (ii) or general formula (iii), general formula (L) and (J) with respect to the total amount of the liquid crystal composition of the present invention Lower limit of 80%, 85%, 88%, 90%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, 99%, 100%.
  • the upper limit of the preferable content is 100%, 99%, 98%, and 95%.
  • the liquid crystal composition of the present invention preferably does not contain a compound having a structure in which oxygen atoms such as a peracid (—CO—OO—) structure are bonded in the molecule.
  • the content of the compound having a carbonyl group is preferably 5% or less, and preferably 3% or less with respect to the total mass of the liquid crystal composition. More preferably, it is more preferably 1% or less, and most preferably not substantially contained.
  • the content of the compound substituted with chlorine atoms is preferably 15% or less, preferably 10% or less, based on the total mass of the liquid crystal composition, It is preferably 8% or less, more preferably 5% or less, further preferably 3% or less, and still more preferably substantially not contained.
  • the content of a compound in which all the ring structures in the molecule are 6-membered rings is based on the total mass of the liquid crystal composition. It is preferably 80% or more, more preferably 90% or more, still more preferably 95% or more, and the liquid crystal composition is composed only of a compound in which all of the ring structures in the molecule are substantially 6-membered rings. Is most preferable.
  • the content of the compound having a cyclohexenylene group as a ring structure it is preferable to reduce the content of the compound having a cyclohexenylene group to the total amount of the liquid crystal composition. It is preferably 10% or less, more preferably 8% or less, more preferably 5% or less, more preferably 3% or less, and still more preferably substantially not contained with respect to the mass. .
  • the content of a compound having a 2-methylbenzene-1,4-diyl group in the molecule, in which a hydrogen atom may be substituted with a halogen may be reduced.
  • the content of the compound having a 2-methylbenzene-1,4-diyl group in the molecule is preferably 10% or less, more preferably 8% or less with respect to the total mass of the liquid crystal composition. It is preferably 5% or less, more preferably 3% or less, and still more preferably substantially not contained.
  • substantially not contained in the present application means that it is not contained except for an unintentionally contained product.
  • the alkenyl group when the compound contained in the liquid crystal 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 alkenyl group has 2 to 2 carbon atoms.
  • the alkenyl group when the alkenyl group is bonded to benzene, the alkenyl group preferably has 4 to 5 carbon atoms, and the unsaturated bond of the alkenyl group and benzene are directly bonded. Preferably not.
  • the liquid crystal composition of the present invention may contain a polymerizable compound in order to produce a liquid crystal display element such as a PS mode, a transverse electric field type PSA mode, or a transverse electric field type PSVA mode.
  • a polymerizable compound such as a PS mode, a transverse electric field type PSA mode, or a transverse electric field type PSVA mode.
  • the polymerizable compound that can be used include a photopolymerizable monomer that undergoes polymerization by energy rays such as light.
  • the structure has, for example, a liquid crystal skeleton in which a plurality of six-membered rings such as biphenyl derivatives and terphenyl derivatives are connected. Examples thereof include a polymerizable compound. More specifically, the general formula (XX)
  • X 201 and X 202 each independently represent a hydrogen atom or a methyl group
  • Sp 201 and Sp 202 each independently represent a single bond, an alkylene group having 1 to 8 carbon atoms or O— (CH 2 ) s —
  • Z 201 represents —OCH 2 —, —CH 2 O—, —COO—, —OCO—, —CF 2 O—, —OCF 2 —, —CH 2 CH 2 —, —CF 2 CF 2 —, —CH ⁇ CH—COO—, —CH ⁇ CH—OCO—, —COO—CH ⁇ CH—, —OCO—CH ⁇ CH—, —COO—CH 2 CH 2 —, —OCO—CH 2 CH 2 —, —CH 2 CH 2 —COO—, —CH 2 CH 2 —OCO—, —COO—CH 2 CH 2 —, —OCO—CH 2 CH 2 —, —CH 2 CH 2 —COO
  • X 201 and X 202 are each preferably a diacrylate derivative that represents a hydrogen atom, or a dimethacrylate derivative that has a methyl group, and a compound in which one represents a hydrogen atom and the other represents a methyl group.
  • diacrylate derivatives are the fastest, dimethacrylate derivatives are slow, asymmetric compounds are in the middle, and a preferred embodiment can be used depending on the application.
  • a dimethacrylate derivative is particularly preferable.
  • Sp 201 and Sp 202 each independently represent a single bond, an alkylene group having 1 to 8 carbon atoms or O— (CH 2 ) s —, but at least one of them may be a single bond in a PSA display element.
  • a compound in which both represent a single bond or an embodiment in which one represents a single bond and the other represents an alkylene group having 1 to 8 carbon atoms or O— (CH 2 ) s — is preferable.
  • 1 to 4 alkyl groups are preferable, and s is preferably 1 to 4.
  • Z 201 represents —OCH 2 —, —CH 2 O—, —COO—, —OCO—, —CF 2 O—, —OCF 2 —, —CH 2 CH 2 —, —CF 2 CF 2 — or a single bond.
  • —COO—, —OCO— or a single bond is more preferred, and a single bond is particularly preferred.
  • M 201 represents a 1,4-phenylene group, a trans-1,4-cyclohexylene group or a single bond in which any hydrogen atom may be substituted by a fluorine atom, but the 1,4-phenylene group or the single bond is preferable.
  • C represents a ring structure other than a single bond
  • Z 201 is preferably a linking group other than a single bond.
  • M 201 is a single bond
  • Z 201 is preferably a single bond.
  • the ring structure between Sp 201 and Sp 202 is specifically preferably the structure described below.
  • general formula (XX-1) to general formula (XX-4) are particularly preferable, and among them, general formula (XX-2) is most preferable.
  • Sp 20 represents an alkylene group having 2 to 5 carbon atoms.
  • an appropriate polymerization rate is desirable. Therefore, active energy rays such as ultraviolet rays or electron beams are used singly or in combination or in sequence. A method of polymerizing by irradiating is preferable. When ultraviolet rays are used, a polarized light source or a non-polarized light source may be used.
  • the orientation state of the unpolymerized part is changed by changing conditions such as an electric field, a magnetic field, or temperature, and further irradiation with active energy rays is performed. Then, it is possible to use a means for polymerization.
  • ultraviolet exposure it is preferable to perform ultraviolet exposure while applying an alternating electric field to the polymerizable compound-containing composition.
  • the alternating electric field to be applied is preferably an alternating current having a frequency of 10 Hz to 10 kHz, more preferably a frequency of 60 Hz to 10 kHz, and the voltage is selected depending on a desired pretilt angle of the liquid crystal display element.
  • the temperature during the irradiation is preferably within a temperature range in which the liquid crystal state of the liquid crystal composition of the present invention is maintained. Polymerization is preferably performed at a temperature close to room temperature, that is, typically at a temperature of 15 to 35 ° C.
  • a lamp for generating ultraviolet rays a metal halide lamp, a high-pressure mercury lamp, an ultra-high pressure mercury lamp, or the like can be used.
  • a wavelength of the ultraviolet-rays to irradiate it is preferable to irradiate the ultraviolet-ray of the wavelength range which is not the absorption wavelength range of a liquid crystal composition, and it is preferable to cut and use an ultraviolet-ray as needed.
  • Intensity of ultraviolet irradiation is preferably from 0.1mW / cm 2 ⁇ 100W / cm 2, 2mW / cm 2 ⁇ 50W / cm 2 is more preferable.
  • the amount of energy of ultraviolet rays to be irradiated can be adjusted as appropriate, but is preferably 10 mJ / cm 2 to 500 J / cm 2, and more preferably 100 mJ / cm 2 to 200 J / cm 2 .
  • the intensity may be changed.
  • the time for irradiating with ultraviolet rays is appropriately selected depending on the intensity of the irradiated ultraviolet rays, but is preferably from 10 seconds to 3600 seconds, and more preferably from 10 seconds to 600 seconds.
  • the polymerization proceeds even when no polymerization initiator is present, but may contain a polymerization initiator in order to promote the polymerization.
  • the polymerization initiator include benzoin ethers, benzophenones, acetophenones, benzyl ketals, acylphosphine oxides, and the like.
  • the liquid crystal composition in the present invention can further contain a compound represented by the general formula (Q).
  • R Q represents a straight-chain alkyl group or a branched-chain alkyl group having 1 to 22 carbon atoms, and one or two or more CH 2 groups in the alkyl group are —O—so that oxygen atoms are not directly adjacent to each other.
  • Linear alkyl group, linear alkoxy group, linear alkyl group in which one CH 2 group is substituted with —OCO— or COO—, branched alkyl group, branched alkoxy group, one CH 2 group is —OCO— or A branched alkyl group substituted by COO- is preferred, a linear alkyl group having 1 to 20 carbon atoms, a linear alkyl group in which one CH 2 group is substituted by -OCO- or COO-, a branched alkyl group A branched alkoxy group, one CH A branched alkyl group in which two groups are substituted with —OCO— or COO— is more preferable.
  • MQ represents a trans-1,4-cyclohexylene group, a 1,4-phenylene group
  • the compound represented by the general formula (Q) is preferably a compound represented by the following general formula (Qa) to general formula (Qd).
  • R Q1 is preferably a linear or branched alkyl group having 1 to 10 carbon atoms
  • R Q2 is preferably a linear or branched alkyl group having 1 to 20 carbon atoms
  • R Q3 is A linear alkyl group having 1 to 8 carbon atoms, a branched alkyl group, a linear alkoxy group or a branched alkoxy group is preferable
  • L Q is preferably a linear alkylene group or a branched alkylene group having 1 to 8 carbon atoms.
  • compounds represented by general formula (Qa) to general formula (Qd) compounds represented by general formula (Qc) and general formula (Qd) are more preferable.
  • the compound represented by formula (Q) preferably contains one or two compounds, more preferably contains 1 to 5 compounds, and the content is 0.001. To 1%, 0.001 to 0.1% is more preferable, and 0.001 to 0.05% is particularly preferable.
  • the liquid crystal composition containing the polymerizable compound of the present invention is provided with a liquid crystal alignment ability by polymerization of the polymerizable compound contained therein by ultraviolet irradiation, and the amount of transmitted light can be increased by utilizing the birefringence of the composition. Used for controlling liquid crystal display elements.
  • the liquid crystal display device using the liquid crystal composition of the present invention is useful for achieving both high-speed response and suppression of display failure, and is particularly useful for a liquid crystal display device for active matrix driving, including VA mode, PSVA mode, It can be applied to a liquid crystal display element for PSA mode, IPS mode, FFS mode or ECB mode.
  • AM-LCD active matrix liquid crystal display element
  • TN nematic liquid crystal display element
  • STN-LCD super twisted nematic liquid crystal display element
  • OCB-LCD OCB-LCD
  • IPS-LCD in-plane switching liquid crystal display
  • FFS-LSD far field switching liquid crystal display element
  • the liquid crystal display element includes a first substrate and a second substrate disposed opposite to each other, and a book filled between the first substrate and the second substrate.
  • a liquid crystal layer containing the liquid crystal composition of the invention includes a common electrode on the first substrate; a plurality of gate bus lines and data bus lines arranged in a matrix; the gate bus lines and the data bus lines;
  • a thin film transistor provided at an intersection, an electrode layer driven by the thin film transistor and having a pixel electrode for each pixel that forms an electric field substantially parallel to the substrate, the liquid crystal layer, and the first substrate
  • a liquid crystal display element having an alignment film layer for inducing homogeneous alignment formed between the second substrate and the second substrate.
  • the liquid crystal display element according to the present invention includes a first polarizing plate, a first substrate, a common electrode, an insulating layer, an electrode layer including the thin film transistor, a (first) alignment film, A configuration in which a liquid crystal layer containing a liquid crystal composition, a (second) alignment film, a color filter, a second substrate, and a second polarizing plate are sequentially laminated is preferable.
  • the liquid crystal composition having positive dielectric anisotropy of the present invention can obtain a significantly low viscosity and a high elastic constant Kavg, has good solubility at low temperatures, and has a specific resistance and a voltage holding ratio of Since the change caused by light is extremely small, the practicality of the product is high, and liquid crystal display elements such as IPS type and FFS type using this can achieve high-speed response.
  • the two substrates of the liquid crystal cell used for the liquid crystal display element can be made of a transparent material having flexibility such as glass or plastic, and one of them can be an opaque material such as silicon.
  • a transparent substrate having a transparent electrode layer can be obtained, for example, by sputtering indium tin oxide (ITO) on a transparent substrate such as a glass plate.
  • the color filter provided on the first substrate and the second substrate can be prepared by, for example, a pigment dispersion method, a printing method, an electrodeposition method, or a dyeing method.
  • a method for producing a color filter by the pigment dispersion method will be described as an example.
  • a curable coloring composition for a color filter is applied onto the transparent substrate, subjected to patterning treatment, and cured by heating or light irradiation. By performing this process for each of the three colors red, green, and blue, a pixel portion for a color filter can be created.
  • a pixel electrode provided with an active element such as a TFT, a thin film diode, or a metal insulator metal specific resistance element may be provided on the substrate.
  • the substrate is opposed so that the transparent electrode layer is on the inside.
  • the thickness of the obtained light control layer is 1 to 100 ⁇ m. More preferably, the thickness is 1.5 to 10 ⁇ m.
  • the polarizing plate it is preferable to adjust the product of the refractive index anisotropy ⁇ n of the liquid crystal and the cell thickness d so that the contrast is maximized.
  • the polarizing axis of each polarizing plate can be adjusted so that the viewing angle and contrast are good.
  • a retardation film for widening the viewing angle can also be used.
  • the spacer examples include columnar spacers made of glass particles, plastic particles, alumina particles, a photoresist material, and the like. Thereafter, a sealant such as an epoxy thermosetting composition is screen-printed on the substrates with a liquid crystal inlet provided, the substrates are bonded together, and heated to thermally cure the sealant.
  • a sealant such as an epoxy thermosetting composition is screen-printed on the substrates with a liquid crystal inlet provided, the substrates are bonded together, and heated to thermally cure the sealant.
  • a normal vacuum injection method or an ODF method can be used as a method for sandwiching the polymerizable compound-containing composition between two substrates.
  • it can be suitably used for a display element manufactured using the ODF method.
  • a sealant such as epoxy photothermal curing is drawn on a backplane or frontplane substrate using a dispenser in a closed-loop bank shape, and then removed.
  • a liquid crystal display element can be manufactured by bonding a front plane and a back plane after dropping a predetermined amount of the liquid crystal composition in the air.
  • the liquid crystal composition of the present invention can be preferably used because the liquid crystal composition can be stably dropped in the ODF process.
  • the measured characteristics are as follows.
  • T NI / ° C . Nematic phase-isotropic liquid phase transition temperature (° C.) ⁇ n: Refractive index anisotropy at 298K ⁇ : Dielectric anisotropy at 298K ⁇ / mPa ⁇ s: Viscosity at 293K (mPa ⁇ s) ⁇ 1 / mPa ⁇ s: Rotational viscosity at 298K (mPa ⁇ s) Vth: Voltage at which the transmittance changes by 10% when liquid crystal is sealed in a TN cell having a thickness of 6 microns and voltage is applied to a 298K crossed Nicol polarizing plate. K11, K22, K33: Elastic constants at 298K.
  • Kaverage means their average value.
  • the measurement device EC-1 manufactured by Toyo Technica
  • liquid crystal was sealed in a horizontal alignment cell with a cell gap of 30 ⁇ m, and the capacitance (C) change obtained by applying 30 ⁇ 0 volts (V). This was calculated by fitting the curve (CV curve).
  • K22 was calculated by using the following equation (1) by obtaining the threshold voltage (Vc) by fitting the same liquid crystal in a 20 ⁇ m TN cell and fitting a CV curve obtained by applying a voltage in the same manner.
  • ⁇ 0 represents the dielectric constant of vacuum.
  • VHR Voltage holding ratio (%) at 333 K under conditions of frequency 60 Hz and applied voltage 5 V
  • VHR TEG (test element group) for encapsulating liquid crystal composition sample in a thermostatic chamber at 130 ° C. For 1 hour and then measured under the same conditions as in the VHR measurement method described above.
  • Burn-in The burn-in evaluation of the liquid crystal display element is performed until the afterimage of the fixed pattern reaches an unacceptable afterimage level when displaying the predetermined fixed pattern in the display area for an arbitrary test time and then displaying the entire screen uniformly.
  • the test time was measured. 1) The test time referred to here indicates the display time of the fixed pattern, and the longer this time is, the more the afterimage is suppressed and the higher the performance. 2)
  • the unacceptable afterimage level is a level at which an afterimage that is rejected in the shipment acceptance / rejection determination is observed.
  • Sample A 1000 hours
  • Sample B 500 hours
  • Sample C 200 hours
  • Sample D 100 hours Performance is A>B>C> D.
  • Drop marks The evaluation of the drop marks of the liquid crystal display device was performed by visual observation of the drop marks that appeared white when the entire surface was displayed in black by the following five-step evaluation.
  • Process suitability is determined by dropping a liquid crystal 50pL at a time, "0 to 100 times, 101 to 200 times, 201 to 300 times, " 100 times at a time using a constant volume metering pump in the ODF process. The mass of the liquid crystal for each 100 drops was measured and evaluated by the number of drops at which the mass variation reached a size that could not be adapted to the ODF process.
  • Low temperature storage For storage stability evaluation at low temperature, after preparing the liquid crystal composition, 0.5 g of the liquid crystal composition was weighed into a 1 mL sample bottle and stored in a temperature controlled test bath at ⁇ 25 ° C. for 240 hours. The occurrence of precipitates from the liquid crystal composition was observed and the test time when the precipitates were observed was measured. It can be said that the longer the test time until precipitation occurs, the better the storage stability at low temperatures.
  • Solubility at low temperature In order to evaluate the solubility at a low temperature, after preparing the liquid crystal composition, 1 g of the liquid crystal composition was weighed in a 2 mL sample bottle, and the following operation state “ ⁇ 20 ° C. (1 hour) in a temperature-controlled test tank. Hold) ⁇ Temperature rise (0.1 ° C / min) ⁇ 0 ° C (1 hour hold) ⁇ Temperature rise (0.1 ° C / min) ⁇ 20 ° C (1 hour hold) ⁇ Temperature drop (-0.1 ° C) / Min) ⁇ 0 ° C. (hold for 1 hour) ⁇ temperature drop ( ⁇ 0.1 ° C./min) ⁇ 20° C.
  • Volatility / contamination of production equipment Evaluation of the volatility of the liquid crystal material was performed by observing the operating state of the vacuum stirring and defoaming mixer using a stroboscope and visually observing the foaming of the liquid crystal material. Specifically, 0.8 kg of a liquid crystal composition is put into a special container of a 2.0 L vacuum stirring and defoaming mixer, and vacuum stirring is performed at a revolution speed of 15 S-1 and a rotation speed of 7.5 S-1 under 4 kPa degassing. The defoaming mixer was operated and the time until foaming started was measured.
  • the liquid crystal composition of Example 1 has comparable ⁇ and ⁇ 1 compared to Comparative Example 1, but has a higher nematic transition temperature (TNI) and ⁇ n.
  • the liquid crystal composition of Example 2 has the same nematic transition temperature (TNI), ⁇ , ⁇ n as those of Comparative Example 1, but it can be seen that ⁇ 1 is greatly improved. It can also be seen that the same effect can be obtained in Examples 3 to 5 in which the constitution of the component (i) or the component (ii) of the present invention is changed. Since the liquid crystal compositions described in these examples have a small ⁇ 1, they are suitable for IPS, FFS mode, etc. that place importance on transmittance.
  • Liquid crystal compositions having the following compositions (Comparative Examples 2, 3 and Examples 6 to 10) were prepared, and their physical properties were measured. The results are shown in Table 2 below.
  • Comparative Example 2 is a liquid crystal compound containing a compound having an alkenyl group only on one side instead of the compound of general formula (i).
  • Example 6 is a liquid crystal composition containing a compound of the general formula (i) instead of a compound having an alkenyl group on one side. Comparing the two, it can be seen that the liquid crystal composition of Example 6 is greatly improved in ⁇ 1 although Tni is lowered. Therefore, Comparative Example 3 was prepared based on Comparative Example 2 and adjusted so that the nematic transition temperature was about the same as Example 6. Compared to Comparative Example 3, Example 6 has a lower ⁇ 1 and the K33 is increased.
  • Example 7 in which some compounds were substituted based on Example 6 has further improved ⁇ 1 and higher K11 and K22.
  • Examples 8-10 have ⁇ 1 comparable or slightly improved as in Comparative Example 3, with higher ⁇ n and higher elastic constant Kavg. Since the liquid crystal compositions of these examples have a relatively high ⁇ and transition temperature and a high Kavg, they are particularly suitable as components for high-contrast IPS / FFS displays for mobile use. It is known that the response speed of the liquid crystal composition is improved when K33 is increased.
  • Table 3 shows the measurement results of optical characteristics in Comparative Example 3, Example 6, and Example 7 in the FFS mode cell.
  • an FFS substrate with a transparent IZO comb electrode (line width: 3 ⁇ m, electrode spacing: 4 ⁇ m) and insulating layer (SiN x ) of 500 ⁇ m was used, and an alignment film (SE-5811, manufactured by Nissan Chemical Industries) was applied and rubbed. In addition, it was used by being bonded to a counter substrate so that the cell gap was 3.5 microns. The alignment film was rubbed in the direction of 5 ° with respect to the longitudinal direction of the transparent comb electrode.
  • the meaning of each item in the table is as follows.
  • V100 Applied voltage that maximizes the transmittance.
  • TON Liquid crystal response time until the transmittance reaches 90% when V100 is applied from the 0V state.
  • TOFF Liquid crystal response time until the transmittance reaches 10% when the voltage is turned off from the V100 state.
  • Example 6 has improved response time. Further, it can be seen that in Example 7 in which the configuration of the component (ii) is changed, the response time is further increased.
  • Liquid crystal compositions (Examples 11 to 14) having the following compositions were prepared, and their physical properties were measured. The results are shown in Table 4 below.
  • liquid crystal compositions of these examples have relatively high ⁇ n and low ⁇ 1, they are suitable as constituent members for high-speed response narrow gap liquid crystal display elements.
  • these liquid crystal compositions have a transition temperature suitable for indoor displays and have a relatively high ⁇ , the width between the comb electrodes can be widened in the IPS mode and the FFS mode. It is suitable as a structural member of an indoor display with excellent rate.
  • Liquid crystal compositions (Examples 15 to 18) having the following compositions were prepared, and their physical properties were measured. The results are shown in Table 5 below.
  • liquid crystal compositions of these examples have a high ⁇ n and an extremely low ⁇ 1, they are very suitable as a component for a narrow gap liquid crystal display device for high-speed response.
  • these liquid crystal compositions have a transition temperature suitable for indoor displays and can improve the transmittance in the IPS mode and the FFS mode with a small ⁇ , so that a high-speed response indoor display with excellent transmittance is achieved. It is suitable as a constituent member.
  • Liquid crystal compositions (Examples 19 to 22) having the following compositions were prepared, and their physical properties were measured. The results are shown in Table 6 below.
  • liquid crystal compositions of these examples have a very wide liquid crystal temperature range and low ⁇ 1, they are suitable as components for outdoor displays and in-vehicle displays.
  • the liquid crystal composition according to the present invention is widely applicable in the fields of liquid crystal display elements and liquid crystal displays.

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JP2014062186A (ja) * 2012-09-21 2014-04-10 Dic Corp ネマチック液晶組成物
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