CN111183205B - Liquid crystal composition and liquid crystal display element - Google Patents
Liquid crystal composition and liquid crystal display element Download PDFInfo
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- CN111183205B CN111183205B CN201880065166.8A CN201880065166A CN111183205B CN 111183205 B CN111183205 B CN 111183205B CN 201880065166 A CN201880065166 A CN 201880065166A CN 111183205 B CN111183205 B CN 111183205B
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- 239000004973 liquid crystal related substance Substances 0.000 title claims abstract description 312
- 239000000203 mixture Substances 0.000 title claims abstract description 230
- 150000001875 compounds Chemical class 0.000 claims abstract description 322
- 125000004432 carbon atom Chemical group C* 0.000 claims description 79
- 125000000217 alkyl group Chemical group 0.000 claims description 33
- 125000003545 alkoxy group Chemical group 0.000 claims description 29
- 125000003342 alkenyl group Chemical group 0.000 claims description 13
- 125000003302 alkenyloxy group Chemical group 0.000 claims description 9
- 229910052799 carbon Inorganic materials 0.000 claims description 9
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 6
- YJTKZCDBKVTVBY-UHFFFAOYSA-N 1,3-Diphenylbenzene Chemical group C1=CC=CC=C1C1=CC=CC(C=2C=CC=CC=2)=C1 YJTKZCDBKVTVBY-UHFFFAOYSA-N 0.000 claims description 4
- 239000011159 matrix material Substances 0.000 claims description 4
- 238000006467 substitution reaction Methods 0.000 claims description 2
- 238000002834 transmittance Methods 0.000 abstract description 15
- 230000004044 response Effects 0.000 abstract description 13
- RGOVYLWUIBMPGK-UHFFFAOYSA-N nonivamide Chemical compound CCCCCCCCC(=O)NCC1=CC=C(O)C(OC)=C1 RGOVYLWUIBMPGK-UHFFFAOYSA-N 0.000 abstract description 5
- 230000007547 defect Effects 0.000 abstract description 4
- 239000000126 substance Substances 0.000 description 31
- 239000000758 substrate Substances 0.000 description 29
- 125000001153 fluoro group Chemical group F* 0.000 description 15
- 229910052731 fluorine Inorganic materials 0.000 description 14
- 238000000034 method Methods 0.000 description 13
- 239000010408 film Substances 0.000 description 11
- 125000004435 hydrogen atom Chemical group [H]* 0.000 description 11
- 230000000052 comparative effect Effects 0.000 description 10
- 239000003963 antioxidant agent Substances 0.000 description 7
- 125000001309 chloro group Chemical group Cl* 0.000 description 7
- 230000000704 physical effect Effects 0.000 description 6
- 229910052801 chlorine Inorganic materials 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 229910052717 sulfur Inorganic materials 0.000 description 5
- -1 2, 3-difluorophenylene skeleton Chemical group 0.000 description 4
- 239000000654 additive Substances 0.000 description 4
- 125000002947 alkylene group Chemical group 0.000 description 4
- 125000005641 methacryl group Chemical group 0.000 description 4
- 230000000379 polymerizing effect Effects 0.000 description 4
- 239000010409 thin film Substances 0.000 description 4
- 125000001140 1,4-phenylene group Chemical group [H]C1=C([H])C([*:2])=C([H])C([H])=C1[*:1] 0.000 description 3
- 230000005684 electric field Effects 0.000 description 3
- 239000011521 glass Substances 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 125000004955 1,4-cyclohexylene group Chemical group [H]C1([H])C([H])([H])C([H])([*:1])C([H])([H])C([H])([H])C1([H])[*:2] 0.000 description 2
- 239000004642 Polyimide Substances 0.000 description 2
- 230000003078 antioxidant effect Effects 0.000 description 2
- 150000001721 carbon Chemical group 0.000 description 2
- 210000004027 cell Anatomy 0.000 description 2
- 239000006185 dispersion Substances 0.000 description 2
- 238000010894 electron beam technology Methods 0.000 description 2
- 125000006575 electron-withdrawing group Chemical group 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 239000005262 ferroelectric liquid crystals (FLCs) Substances 0.000 description 2
- 125000005843 halogen group Chemical group 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 239000004611 light stabiliser Substances 0.000 description 2
- 239000007791 liquid phase Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 2
- 229910052753 mercury Inorganic materials 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 230000007935 neutral effect Effects 0.000 description 2
- 150000002989 phenols Chemical class 0.000 description 2
- 229920002120 photoresistant polymer Polymers 0.000 description 2
- 239000000049 pigment Substances 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
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- 238000006116 polymerization reaction Methods 0.000 description 2
- 239000000565 sealant Substances 0.000 description 2
- 125000006850 spacer group Chemical group 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- 239000004986 Cholesteric liquid crystals (ChLC) Substances 0.000 description 1
- IAZDPXIOMUYVGZ-UHFFFAOYSA-N Dimethylsulphoxide Chemical compound CS(C)=O IAZDPXIOMUYVGZ-UHFFFAOYSA-N 0.000 description 1
- 239000004593 Epoxy Substances 0.000 description 1
- 239000004988 Nematic liquid crystal Substances 0.000 description 1
- 239000004990 Smectic liquid crystal Substances 0.000 description 1
- 239000006096 absorbing agent Substances 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 150000001412 amines Chemical class 0.000 description 1
- 125000003118 aryl group Chemical group 0.000 description 1
- XITRBUPOXXBIJN-UHFFFAOYSA-N bis(2,2,6,6-tetramethylpiperidin-4-yl) decanedioate Chemical compound C1C(C)(C)NC(C)(C)CC1OC(=O)CCCCCCCCC(=O)OC1CC(C)(C)NC(C)(C)C1 XITRBUPOXXBIJN-UHFFFAOYSA-N 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 238000004040 coloring Methods 0.000 description 1
- 210000002858 crystal cell Anatomy 0.000 description 1
- 125000004093 cyano group Chemical group *C#N 0.000 description 1
- 125000000596 cyclohexenyl group Chemical group C1(=CCCCC1)* 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000004043 dyeing Methods 0.000 description 1
- 238000004070 electrodeposition Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 230000001747 exhibiting effect Effects 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 229910052736 halogen Inorganic materials 0.000 description 1
- 150000002367 halogens Chemical class 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- AMGQUBHHOARCQH-UHFFFAOYSA-N indium;oxotin Chemical compound [In].[Sn]=O AMGQUBHHOARCQH-UHFFFAOYSA-N 0.000 description 1
- 230000001678 irradiating effect Effects 0.000 description 1
- 125000005647 linker group Chemical group 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 125000004430 oxygen atom Chemical group O* 0.000 description 1
- 238000000059 patterning Methods 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000007639 printing Methods 0.000 description 1
- 230000009257 reactivity Effects 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 238000004544 sputter deposition Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
- 229920001187 thermosetting polymer Polymers 0.000 description 1
- 125000005407 trans-1,4-cyclohexylene group Chemical group [H]C1([H])C([H])([H])[C@]([H])([*:2])C([H])([H])C([H])([H])[C@@]1([H])[*:1] 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 239000012780 transparent material Substances 0.000 description 1
- 125000000876 trifluoromethoxy group Chemical group FC(F)(F)O* 0.000 description 1
- 239000006097 ultraviolet radiation absorber Substances 0.000 description 1
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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
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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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- C09K19/06—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
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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
- C09K19/14—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
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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
- C09K19/30—Non-steroidal liquid crystal compounds containing at least two non-condensed rings containing saturated or unsaturated non-aromatic rings, e.g. cyclohexane rings
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- C09K19/44—Mixtures of liquid crystal compounds covered by two or more of the preceding groups C09K19/06 - C09K19/40 containing compounds with benzene rings directly linked
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- 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
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Abstract
The object of the present invention is to provide a liquid crystal composition having a negative Δε and T NI High, gamma 1 Small, delta n large, K 11 Is small. Provided is a liquid crystal display element corresponding to a high-definition VA type, PSA type, PSVA type or the like, which has a high response speed, a high VHR and a high transmittance and has no or little display defects by using the liquid crystal composition. The liquid crystal display element is suitable for liquid crystal televisions, smart phones, notebook computers, tablet computers, vehicle-mounted LCD, PID (public information display ) and the like. The liquid crystal composition of the present invention solves the above problems by a liquid crystal composition containing a compound represented by the general formula (S1), the general formula (S2) and the general formula (S3).
Description
Technical Field
The present invention relates to a liquid crystal composition and a liquid crystal display element using the same.
Background
Liquid crystal display elements are used for various household electrical appliances such as watches and calculators, industrial measurement equipment, automotive panels, mobile phones, smart phones, notebook computers, tablet computers, televisions, and the like. As a liquid crystal display method, a typical liquid crystal display method includes: TN (twisted nematic), STN (super twisted nematic), GH (guest-host), IPS (in-plane switching) and FFS (fringe field switching technique), OCB (optically compensated birefringence), ECB (electrically controlled birefringence), VA (vertical alignment), CSH (color supervertical) and FLC (ferroelectric liquid crystal) and the like. The driving method may be: static driving, multiplex driving, simple matrix method, active Matrix (AM) method driven by TFT (thin film transistor), TFD (thin film diode) or the like. Among these display modes, IPS type, FFS type, ECB type, VA type, CSH type, and the like have a characteristic of a liquid crystal composition exhibiting a negative value using dielectric anisotropy (Δ∈).
Among these, VA-type, PSA-type, and FFS-type display systems using AM driving are used in, for example, liquid crystal televisions, monitors, smartphones, and tablet computers, and further applications as outdoor display elements are being developed from the viewpoint of optimal viewing angle, transmittance, power consumption, and the like.
As a liquid crystal composition having negative Δ∈, a liquid crystal composition using the following liquid crystal compounds (a) and (B) having a 2, 3-difluorophenylene skeleton is disclosed (refer to patent document 1).
[ chemical 1]
The liquid crystal composition uses the liquid crystal compounds (C) and (D) as the liquid crystal compound having a Δ∈ of substantially 0, but the liquid crystal composition has not yet achieved sufficiently low viscosity for liquid crystal compositions requiring high-speed response such as liquid crystal televisions.
[ chemical 2]
On the other hand, there have been disclosed liquid crystal compositions using a liquid crystal compound (E), which introduce a liquid crystal composition having a small refractive index anisotropy Δn in combination with the above-mentioned liquid crystal compound (D) (refer to patent document 2) and a liquid crystal composition to which a liquid crystal compound (F) is added in order to improve the response speed (refer to patent document 3). However, it is known that: the liquid crystal compound having an alkenyl group such as the liquid crystal compound (F) causes a decrease in reliability of the liquid crystal display element, specifically, a decrease in Voltage Holding Ratio (VHR) is liable to occur.
[ chemical 3]
In addition, a liquid crystal composition using a liquid crystal compound (G) and a liquid crystal compound (F) has been disclosed (refer to patent document 4), but a faster response speed is required.
[ chemical 4]
However, in the present day of the development of high definition of liquid crystal display elements, further improvement of transmittance is regarded as an important point, and a liquid crystal composition for providing a liquid crystal display element satisfying the same is being demanded.
Prior art literature
Patent literature
Patent document 1: japanese patent laid-open No. 8-104869
Patent document 2: european patent application publication No. 0474062
Patent document 3: japanese patent laid-open No. 2006-037054
Patent document 4: japanese patent laid-open No. 2001-354967
Disclosure of Invention
Problems to be solved by the invention
The invention provides a liquid crystal composition capable of achieving a fast response speed, a high VHR and a high transmittance, and a liquid crystal display element of VA type, PSA type, PSVA type and the like using the same.
Means for solving the problems
As a result of intensive studies, the present inventors have found that the above problems can be solved by a liquid crystal composition comprising a combination of compounds having specific chemical structures, and have completed the present invention.
ADVANTAGEOUS EFFECTS OF INVENTION
The liquid crystal composition delta epsilon of the invention is negative and T NI High, gamma 1 Small, delta n large, K 11 Is small. A liquid crystal display element corresponding to a high definition VA type, PSA type, PSVA type or the like, which has a high response speed, a high VHR and a high transmittance and is free from or little in display failure by using the liquid crystal composition, can be provided. The liquid crystal display element is suitable for liquid crystal televisions, smart phones, notebook computers, tablet computers, vehicle-mounted LCD, PID (public information display ) and the like.
Drawings
Fig. 1 is a graph showing the effects of examples 1 to 3.
Detailed Description
The present invention is a liquid crystal composition containing 1 or 2 or more compounds represented by the general formula (S1), 1 or 2 or more compounds represented by the general formula (S2), and 1 or 2 or more compounds represented by the general formula (S3), wherein Δε is negative; further, the present invention is a liquid crystal display element using the above liquid crystal composition,
[ chemical 5]
(wherein R is S1 R is R S2 Each independently represents an alkyl group having 1 to 8 carbon atoms or an alkoxy group having 1 to 8 carbon atoms, R S3 R is R S5 Each independently represents 1 carbon atomAn alkyl group of up to 8, an alkoxy group of up to 1 to 8 carbon atoms, or an alkenyl group of up to 2 to 8 carbon atoms, or an alkenyloxy group of up to 2 to 8 carbon atoms, R S4 R is R S6 Each independently represents an alkyl group having 1 to 8 carbon atoms or an alkoxy group having 1 to 8 carbon atoms).
The content of the compound of the general formula (S1) in the liquid crystal composition of the present invention is preferably 10 mass%, more preferably 15 mass%, more preferably 20 mass%, more preferably 25 mass%, more preferably 30 mass%, more preferably 35 mass%, and is preferably 50 mass%, more preferably 45 mass%, more preferably 40 mass%, more preferably 35 mass%, more preferably 30 mass%, as the lower limit value.
The content of the compound of the general formula (S2) in the liquid crystal composition of the present invention is preferably 10 mass%, more preferably 12 mass%, still more preferably 14 mass%, still more preferably 15 mass%, still more preferably 20 mass%, still more preferably 25 mass%, and is preferably 40 mass%, more preferably 35 mass%, still more preferably 30 mass% as the lower limit value.
The content of the compound of the general formula (S3) in the liquid crystal composition of the present invention is preferably 10 mass%, more preferably 15 mass%, more preferably 17 mass%, more preferably 19 mass%, more preferably 20 mass%, more preferably 24 mass%, and is preferably 40 mass%, more preferably 35 mass%, more preferably 30 mass% as the lower limit value.
The compound represented by the general formula (S1) is preferably a compound represented by the formula (S1-1), the formula (S1-2) or the formula (S1-3).
[ chemical 6]
The liquid crystal composition of the present invention particularly preferably contains a compound represented by the formula (S1-1) as the compound represented by the general formula (S1).
The liquid crystal composition of the present invention preferably contains a compound represented by the formula (S1-2) as the compound represented by the general formula (S1).
The liquid crystal composition of the present invention preferably contains a compound represented by the formula (S1-3) as the compound represented by the general formula (S1).
The liquid crystal composition of the present invention particularly preferably contains a compound represented by the formula (S1-1) and a compound represented by the formula (S1-2) as the compound represented by the general formula (S1).
The liquid crystal composition of the present invention particularly preferably contains a compound represented by the formula (S1-1) and a compound represented by the formula (S1-3) as the compound represented by the general formula (S1).
The liquid crystal composition of the present invention may further contain a compound represented by the formula (S1-5) or the formula (S1-6).
[ chemical 7]
The compound represented by the general formula (S2) is preferably a compound represented by the formula (S2-1), the formula (S2-2), the formula (S2-3) or the formula (S2-4).
[ chemical 8]
The liquid crystal composition of the present invention particularly preferably contains a compound represented by the formula (S2-1) as the compound represented by the general formula (S2).
The liquid crystal composition of the present invention preferably contains a compound represented by the formula (S2-2) as the compound represented by the general formula (S2).
The liquid crystal composition of the present invention preferably contains a compound represented by the formula (S2-3) as the compound represented by the general formula (S2).
The liquid crystal composition of the present invention preferably contains a compound represented by the formula (S2-4) as the compound represented by the general formula (S2).
The liquid crystal composition of the present invention further preferably contains a compound represented by the formula (S2-1) and a compound represented by the formula (S2-2) as the compound represented by the general formula (S2).
The liquid crystal composition of the present invention preferably contains a compound represented by the formula (S2-1) and a compound represented by the formula (S2-3) as the compound represented by the general formula (S2).
The liquid crystal composition of the present invention preferably contains a compound represented by the formula (S2-1) and a compound represented by the formula (S2-4) as the compound represented by the general formula (S2).
The liquid crystal composition of the present invention preferably contains a compound represented by the formula (S2-3) and a compound represented by the formula (S2-4) as the compound represented by the general formula (S2).
The compound represented by the general formula (S3) is preferably a compound represented by the general formula (S3-1), the general formula (S3-2), the general formula (S3-3), or the general formula (S3-4).
[ chemical 9]
The liquid crystal composition of the present invention preferably contains a compound represented by the formula (S3-1) as the compound represented by the general formula (S3).
The liquid crystal composition of the present invention preferably contains a compound represented by the formula (S3-2) as the compound represented by the general formula (S3).
The liquid crystal composition of the present invention preferably contains a compound represented by the formula (S3-3) as the compound represented by the general formula (S3).
The liquid crystal composition of the present invention preferably contains a compound represented by the formula (S3-4) as the compound represented by the general formula (S3).
The liquid crystal composition of the present invention further preferably contains a compound represented by the formula (S3-1) and a compound represented by the formula (S3-2) as the compound represented by the general formula (S3).
The liquid crystal composition of the present invention preferably contains a compound represented by the formula (S3-1) and a compound represented by the formula (S3-3) as the compound represented by the general formula (S3).
The liquid crystal composition of the present invention preferably contains a compound represented by the formula (S3-2) and a compound represented by the formula (S3-3) as the compound represented by the general formula (S3).
The liquid crystal composition of the present invention preferably contains a compound represented by the formula (S3-2) and a compound represented by the formula (S3-4) as the compound represented by the general formula (S3).
The liquid crystal composition of the present invention more preferably contains a compound represented by the formula (S3-1), a compound represented by the formula (S3-2), and a compound represented by the formula (S3-3) as the compound represented by the general formula (S3).
The liquid crystal composition of the present invention more preferably contains a compound represented by the formula (S3-1), a compound represented by the formula (S3-2), and a compound represented by the formula (S3-4) as the compound represented by the general formula (S3).
The liquid crystal composition of the present invention particularly preferably contains a compound represented by the formula (S3-1), a compound represented by the formula (S3-2), a compound represented by the formula (S3-3), and a compound represented by the formula (S3-4) as the compound represented by the general formula (S3).
The liquid crystal composition of the present invention may further contain 1 or 2 or more compounds selected from the group of compounds represented by the general formulae (N-02) and (N-04),
[ chemical 10]
(wherein R is 21 R is R 22 Each independently 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 an alkenyloxy group having 2 to 8 carbon atoms, 1 of which groups is not adjacent to or above 2-CH 2 Can be independently and individually substituted by-CH=CH-, -C≡C-, -O-, -CO-, -COO-or-OCO-substitution, Z is Z 1 Respectively and independently represent a single bond, -CH 2 CH 2 -、-OCH 2 -、-CH 2 O-, -COO-, -OCO-, or-C.ident.C-, m each independently represents 1 or 2).
The compounds represented by the general formulae (N-02) and (N-04) have negative dielectric anisotropy (. DELTA.. Epsilon.) and their absolute values show values greater than 2. Here, Δε is the following value: a value extrapolated from a measured value of dielectric anisotropy of a composition obtained by adding the compound to a composition that is substantially dielectric neutral at 25 ℃.
R 21 Preferably an alkyl group having 1 to 8 carbon atoms, more preferably an alkyl group having 1 to 5 carbon atoms, and still more preferably an alkyl group having 1 to 4 carbon atoms. Wherein Z is 1 When the compound represents a single bond or other than a single bond, R 21 Preferably an alkyl group having 1 to 3 carbon atoms.
R 22 Preferably an alkyl group having 1 to 8 carbon atoms or an alkoxy group having 1 to 8 carbon atoms, more preferably an alkyl group having 1 to 5 carbon atoms or an alkoxy group having 1 to 4 carbon atoms, and still more preferably an alkoxy group having 1 to 4 carbon atoms.
At R 21 R is R 22 In the case of an alkenyl group, a group represented by any one of the formulae (R1) to (R5) (the black dot in the formulae represents a carbon atom in the ring structure) is preferable, and the formula (R1) or the formula (R2) is preferable. In detail, when low rotational viscosity (γ1) is important, formula (R1) is preferable, and when high (T Ni ) Or a high elastic constant (K33), the formula (R2) is preferable.
[ chemical 11]
Z 1 Respectively and independently represent a single bond, -CH 2 CH 2 -、-OCH 2 -、-CH 2 O-、-COO-、-OCO-、-OCF 2 -、-CF 2 O-, -CH=CH-, -CF=CF-, or-C≡C-, preferably a single bond, -CH 2 CH 2 -、-OCH 2 -、-CH 2 O-, more preferably a single bond, -CH 2 CH 2 -or-CH 2 O-。
In the general formula (N-02), Z is preferable 1 Is a single bond, m is 1, R 21 Is alkyl of 2 to 4 carbon atoms, R 22 A compound which is an alkoxy group having 1 to 4 carbon atoms.
In the general formula (N-04), Z is preferable 1 is-CH 2 CH 2 -、R 21 Is alkyl of 1 to 4 carbon atoms, R 22 A compound which is an alkoxy group having 1 to 4 carbon atoms.
The fluorine atom of the compounds represented by the general formulae (N-02) and (N-04) may be substituted with a chlorine atom which is also a halogen group. Among them, the content of the compound substituted with a chlorine atom is preferably as small as possible, and more preferably not.
The hydrogen atoms of the rings of the compounds represented by the general formulae (N-02) and (N-04) may be further substituted with fluorine atoms or chlorine atoms. Among them, the content of the compound substituted with a chlorine atom is preferably as small as possible, and more preferably not.
The compound represented by the general formula (N-02) and (N-04) is preferably a compound having a negative Δε and an absolute value of more than 3.
The compound represented by the general formula (N-02) preferably contains 1 or 2 or more compounds selected from the group consisting of the compounds represented by the general formula (N-02-1), the general formula (N-02-2), and the general formula (N-02-3),
[ chemical 12]
(R 21 R is R 22 Each independently 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 an alkenyloxy group having 2 to 8 carbon atoms, 1 of which groups is not adjacent to or above 2-CH 2 -may each be independently substituted by-ch=ch-, -c≡c-, -O-, -CO-, -COO-, or-OCO-.
R 21 Each independently is preferably an alkyl group having 1 to 4 carbon atoms, R 22 Alkoxy groups having 1 to 4 carbon atoms are preferable.
The liquid crystal composition of the present invention preferably further comprises a compound represented by the general formula (N-02-3).
As the compound represented by the general formula (N-04), 1 or 2 or more compounds represented by the general formula (N-04-1) may be contained,
[ chemical 13]
(R 21 R is R 22 Each independently 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 an alkenyloxy group having 2 to 8 carbon atoms, 1 of which groups is not adjacent to or above 2-CH 2 -may each be independently substituted by-ch=ch-, -c≡c-, -O-, -CO-, -COO-, or-OCO-.
R in the formula (N-04-1) 21 Preferably an alkyl group having 1 to 4 carbon atoms, R 23 Alkoxy groups having 1 to 4 carbon atoms are preferable.
The liquid crystal composition of the present invention particularly preferably contains a compound represented by the general formula (N-04-1).
The preferable lower limit of the content of the compound represented by the general formula (N-02) is 0%, 1%, 5% and 10% relative to the total amount of the liquid crystal composition of the present invention, and the upper limit is 10% and 5% relative to the total amount of the liquid crystal composition of the present invention.
The preferable lower limit value of the content of the compound represented by the general formula (N-04) is 0%, 1%, 5% and 10% relative to the total amount of the liquid crystal composition of the present invention, and the upper limit value is 30%, 25%, 20%, 15%, 10% and 5% relative to the total amount of the liquid crystal composition of the present invention.
The liquid crystal composition of the present invention may further contain 1 or 2 or more compounds represented by the general formula (N-06).
[ chemical 14]
(wherein R is 21 R is R 22 The same meaning as described above is indicated. )
The liquid crystal composition of the present invention preferably does not contain the compound represented by the formula (N-06).
The liquid crystal composition of the present invention preferably does not contain a cyclohexene ring-containing compound.
The liquid crystal composition of the present invention contains 1 or 2 or more compounds selected from the group of compounds represented by the general formulae (NU-02) to (NU-07) as compounds having a Δε of substantially 0,
[ 15]
(wherein R is NU21 、R NU22 、R NU31 、R NU32 、R NU41 、R NU42 、R NU51 、R NU52 、R NU61 、R NU62 、R NU71 R is R NU72 Each independently 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 an alkenyloxy group having 2 to 8 carbon atoms, 1 of which groups is not adjacent to or above 2-CH 2 -may each be independently substituted by-ch=ch-, -c≡c-, -O-, -CO-, -COO-, or-OCO-.
R NU21 、R NU22 、R NU31 、R NU32 、R NU41 、R NU42 、R NU51 、R NU52 、R NU61 、R NU62 、R NU71 R is R NU72 Each independently is preferably an alkyl group having 1 to 5 carbon atoms or an alkoxy group having 1 to 4 carbon atoms.
The liquid crystal composition of the present invention preferably contains a compound represented by the general formula (NU-05) and the general formula (NU-02).
The liquid crystal composition of the present invention preferably contains a compound represented by the general formula (NU-05) and a compound represented by the general formula (NU-03).
The liquid crystal composition of the present invention preferably contains a compound represented by the general formula (NU-05) and the general formula (NU-04).
The liquid crystal composition of the present invention preferably contains a compound represented by the general formula (NU-05) and the general formula (NU-06).
The liquid crystal composition of the present invention preferably contains a compound represented by the general formula (NU-06) and the general formula (NU-07).
The liquid crystal composition of the present invention preferably contains a compound represented by the general formula (NU-02), the general formula (NU-03) and the general formula (NU-04).
The liquid crystal composition of the present invention preferably contains a compound represented by the general formula (NU-03), the general formula (NU-04) and the general formula (NU-05).
The liquid crystal composition of the present invention preferably contains a compound represented by the general formula (NU-03), the general formula (NU-04) and the general formula (NU-06).
The liquid crystal composition of the present invention preferably contains a compound represented by the general formula (NU-03), the general formula (NU-05) and the general formula (NU-06).
The liquid crystal composition of the present invention preferably contains 1 or 2 or more compounds selected from the group of compounds represented by the general formula (NU-02), the general formula (NU-03) and the general formula (NU-05).
The content of the compound represented by the general formula (NU-02) is preferably 0 to 30% by mass, more preferably 1 to 25% by mass, and still more preferably 1 to 20% by mass.
The content of the compound represented by the general formula (NU-03) is preferably 0 to 20% by mass, more preferably 1 to 20% by mass, and still more preferably 1 to 15% by mass.
The content of the compound represented by the general formula (NU-04) is preferably 0 to 20% by mass, more preferably 1 to 15% by mass, and still more preferably 1 to 10% by mass.
The content of the compound represented by the general formula (NU-05) is preferably 0 to 30% by mass, more preferably 1 to 25% by mass, and still more preferably 2 to 20% by mass.
The content of the compound represented by the general formula (NU-06) is preferably 0 to 20% by mass, more preferably 0 to 15% by mass, and still more preferably 1 to 10% by mass.
The content of the compound represented by the general formula (NU-07) is preferably 0 to 20% by mass, more preferably 0 to 15% by mass, and still more preferably 1 to 10% by mass.
The liquid crystal composition of the present invention particularly preferably contains a compound represented by the general formula (NU-05).
The liquid crystal composition of the present invention particularly preferably contains a compound represented by the general formula (NU-05) selected from the group of compounds represented by the formulas (NU-05-1) to (NU-05-10).
[ 16]
The liquid crystal composition of the present invention preferably contains a compound represented by the formula (NU-05-1).
The liquid crystal composition of the present invention preferably contains a compound represented by the formula (NU-05-2).
The liquid crystal composition of the present invention preferably contains a compound represented by the formula (NU-05-3).
The liquid crystal composition of the present invention preferably contains a compound represented by the formula (NU-05-6).
The liquid crystal composition of the present invention preferably contains a compound represented by the formula (NU-05-9).
The liquid crystal composition of the present invention preferably contains a compound represented by the formula (NU-05-10).
The liquid crystal composition of the present invention preferably contains a compound represented by the formula (NU-05-1) and a compound represented by the formula (NU-05-2).
The liquid crystal composition of the present invention preferably contains a compound represented by the formula (NU-05-2) and a compound represented by the formula (NU-05-3).
The liquid crystal composition of the present invention preferably contains a compound represented by the formula (NU-05-5) and a compound represented by the formula (NU-05-6).
The liquid crystal composition of the present invention preferably contains a compound represented by the formula (NU-05-6) and a compound represented by the formula (NU-05-9).
The liquid crystal composition of the present invention preferably contains a compound represented by the formula (NU-05-1), a compound represented by the formula (NU-05-2) and a compound represented by the formula (NU-05-3).
The liquid crystal composition of the present invention preferably contains a compound represented by the formula (NU-05-1), a compound represented by the formula (NU-05-2) and a compound represented by the formula (NU-05-6).
The liquid crystal composition of the present invention preferably contains a compound represented by the formula (NU-05-2), a compound represented by the formula (NU-05-3) and a compound represented by the formula (NU-05-6).
The liquid crystal composition of the present invention preferably contains a compound represented by the formula (NU-05-1), a compound represented by the formula (NU-05-6) and a compound represented by the formula (NU-05-9).
The liquid crystal composition of the present invention preferably contains a compound represented by the formula (NU-05-2), a compound represented by the formula (NU-05-6) and a compound represented by the formula (NU-05-9).
The liquid crystal composition of the present invention particularly preferably contains a compound represented by the general formula (NU-03) selected from the group of compounds represented by the formulas (NU-03-1) to (NU-03-2).
[ chemical 17]
The liquid crystal composition of the present invention preferably contains a compound represented by the formula (NU-03-1).
The liquid crystal composition of the present invention preferably contains a compound represented by the formula (NU-03-2).
The liquid crystal composition of the present invention preferably contains a compound represented by the formula (NU-03-1) and a compound represented by the formula (NU-03-2).
The liquid crystal composition of the present invention particularly preferably contains a compound represented by the general formula (NU-02) as a compound selected from the group of compounds represented by the formulas (NU-02-1) to (NU-02-2).
[ chemical 18]
The liquid crystal composition of the present invention particularly preferably contains a compound represented by the formula (NU-02-1).
The liquid crystal composition of the present invention is a liquid crystal composition having negative delta epsilon, and contains a compound having negative delta epsilon and an absolute value of 3 or more. The compounds having negative Δε and an absolute value of 3 or more have electron-withdrawing groups such as 2 or more halogen atoms and cyano groups in the short axis direction of the molecule, and particularly have electron-withdrawing groups on adjacent carbon atoms in the same aromatic ring. The compounds having negative Δε and an absolute value of 3 or more are often compounds having structures represented by formulas (NS-1) to (NS-4) in the molecule.
In the liquid crystal composition of the present invention, the lower limit value of the total content of the compounds represented by the general formulae (S2) and (S3) in the total amount of the compounds having a negative Δ∈ and an absolute value of 3 or more is preferably 90 mass%, preferably 92 mass%, preferably 94 mass%, preferably 96 mass%, preferably 98 mass%, preferably 99 mass%, preferably substantially 100 mass% excluding additives such as antioxidants and polymerizable compounds, and the upper limit value is preferably substantially 100 mass% excluding additives such as antioxidants and polymerizable compounds.
In the liquid crystal composition of the present invention, the lower limit value of the total content of the compounds represented by the general formulae (S2) and (S3) in the total amount of the compounds having the structures represented by the formulae (NS-1) to (NS-4) in the molecule is preferably 90% by mass, more preferably 92% by mass, still more preferably 94% by mass, still more preferably 96% by mass, still more preferably 98% by mass, still more preferably 99% by mass, and still more preferably substantially 100% by mass excluding additives such as antioxidants and polymerizable compounds, and the upper limit value is preferably substantially 100% by mass excluding additives such as antioxidants and polymerizable compounds.
[ chemical 19]
(wherein, at the same time, other structures are combined.)
The liquid crystal composition of the present invention contains the compound represented by the general formula (S1), the compound represented by the general formula (S2), and the compound represented by the general formula (S3), and preferably further contains 1 or 2 or more compounds selected from the group of compounds represented by the general formulae (NU-02) to (NU-07), and the total upper limit of the content thereof is preferably 100 mass%, 99 mass%, 98 mass%, 97 mass%, 96 mass%, 95 mass%, 94 mass%, 93 mass%, 92 mass%, 91 mass%, 90 mass%, and the total lower limit of the content thereof is preferably 80 mass%, 82 mass%, 84 mass%, 86 mass%, 88 mass%, 90 mass%, 92 mass%, 94 mass%, 96 mass%, 98 mass%, 99 mass%, 100 mass% with respect to the entire liquid crystal composition.
The liquid crystal composition of the invention is the following liquid crystal composition, namely: the composition comprises 10 to 50 mass% of a compound represented by the general formula (S1), 14 to 34 mass% of a compound represented by the general formula (S2), 19 to 39 mass% of a compound represented by the general formula (S3), 3 to 30 mass% of a compound represented by the general formula (NU-05), 1 to 20 mass% of a compound represented by the general formula (NU-03-1), and 0 to 20 mass% of a compound represented by the general formula (NU-03-2), wherein the total of the components is 85 to 100 mass% and the dielectric anisotropy (delta epsilon) is negative.
The liquid crystal composition of the invention is the following liquid crystal composition, namely: the composition comprises 10 to 50 mass% of a compound represented by the general formula (S1), 14 to 34 mass% of a compound represented by the general formula (S2), 19 to 39 mass% of a compound represented by the general formula (S3), 3 to 30 mass% of a compound represented by the general formula (NU-05), 1 to 20 mass% of a compound represented by the general formula (NU-03-1), and 0 to 20 mass% of a compound represented by the general formula (NU-03-2), wherein the total of the components is 90 to 100 mass% and the dielectric anisotropy (delta epsilon) is negative.
The liquid crystal composition of the invention is the following liquid crystal composition, namely: the composition comprises 10 to 50 mass% of a compound represented by the general formula (S1), 14 to 34 mass% of a compound represented by the general formula (S2), 19 to 39 mass% of a compound represented by the general formula (S3), 3 to 30 mass% of a compound represented by the general formula (NU-05), 1 to 20 mass% of a compound represented by the general formula (NU-03-1), 0 to 20 mass% of a compound represented by the general formula (NU-03-2), 1 to 25 mass% of a compound represented by the general formula (NU-02-1), and the total of the components is 85 to 100 mass% and the dielectric anisotropy (Deltaε) is negative.
The liquid crystal composition of the invention is the following liquid crystal composition, namely: the composition comprises 10 to 50 mass% of a compound represented by the general formula (S1), 14 to 34 mass% of a compound represented by the general formula (S2), 19 to 39 mass% of a compound represented by the general formula (S3), 3 to 30 mass% of a compound represented by the general formula (NU-05), 1 to 20 mass% of a compound represented by the general formula (NU-03-1), 0 to 20 mass% of a compound represented by the general formula (NU-03-2), 1 to 25 mass% of a compound represented by the general formula (NU-02-1), and the total of the components is 90 to 100 mass% and the dielectric anisotropy (Deltaε) is negative.
The liquid crystal composition of the present invention may contain 1 or 2 or more polymerizable compounds.
The liquid crystal composition of the present invention may contain 1 or 2 or more polymerizable compounds represented by the general formula (RM),
[ chemical 20]
(wherein R is 101 To R 112 Respectively and independently represent P 13 -S 13 -, a hydrogen atom, a fluorine atom, an alkyl group having 1 to 18 carbon atoms or an alkoxy group, the hydrogen atom in the group being optionally substituted by a fluorine atom, n RM Represents 0 or 1, P 11 、P 12 P 13 Each independently represents a group selected from the group consisting of the formulae (Re-1) to (Re-9), S 11 、S 12 S and S 13 Each independently represents a single bond or an alkylene group having 1 to 15 carbon atoms, 1-CH in the alkylene group 2 -or non-contiguous more than 2-CH 2 -can be substituted by-O-, -OCO-or-COO-in such a way that the oxygen atoms are not directly adjacent, in the presence of a plurality of P' s 13 S and S 13 In the case of (2), may be the same or different,
[ chemical 21]
(wherein R is 11 、R 12 、R 13 、R 14 R is R 15 Each independently represents any one of an alkyl group having 1 to 5 carbon atoms, a fluorine atom or a hydrogen atom, m r5 、m r7 、n r5 N is as follows r7 Each independently represents 0, 1, or 2)).
The liquid crystal composition containing the polymerizable compound represented by the general formula (RM) is suitable for the production of PSA-type or PSVA-type liquid crystal display elements. It is also suitable for the case of manufacturing NPS type or PI-less type liquid crystal display elements.
In the general formula (RM), R 101 、R 102 、R 103 、R 104 、R 105 、R 106 、R 107 R is R 108 Respectively and independently represent P 13 -S 13 Any one of an alkyl group having 1 to 18 carbon atoms which may be substituted with a fluorine atom, an alkoxy group having 1 to 18 carbon atoms which may be substituted with a fluorine atom, a fluorine atom or a hydrogen atom, and in the case of an alkyl group and an alkoxy group, the number of carbon atoms is preferably 1 to 16, more preferably 1 to 10, still more preferably 1 to 4, particularly preferably 1. The alkyl group and the alkoxy group may be linear or branched, and are preferably linear.
In the general formula (RM), R 101 、R 102 、R 103 、R 104 、R 105 、R 106 、R 107 R is R 108 Preferably represents P 13 -S 13 -, an alkoxy group having 1 to 3 carbon atoms which may be substituted with a fluorine atom, a fluorine atom or a hydrogen atom, more preferably represents P 13 -S 13 -any one of an alkoxy group having 1 to 3 carbon atoms, a fluorine atom or a hydrogen atom. The alkoxy group preferably has 1 to 3 carbon atoms, more preferably 1 to 2 carbon atoms, and particularly preferably 1 carbon atom.
In the general formula (RM), P 11 、P 12 P 13 Preferably, the compound is represented by the formula (Re-1), the formula (Re-2), the formula (Re-3) or the formula (Re-4), more preferably by the formula (Re-1), still more preferably by the formula (acryl group) or the formula (methacryl group), and particularly preferably by the formula (methacryl group).
In the general formula (RM), P 11 、P 12 P 13 All of the groups may be the same polymerizable group or may be different polymerizable groups. Preferably P 11 P 12 At least one of (C) is of the formula (Re-1), more preferably an acryl or methacryl group, still more preferably a methacryl group, particularly preferably P 11 P 12 Is a methacryloyl group.
In the above formula (RM), S 11 、S 12 S and S 13 Each independently is preferably a single bond or an alkylene group having 1 to 5 carbon atoms, and particularly preferably a single bond. At S 11 、S 12 S and S 13 In the case of a single bond, the amount of the polymerizable compound remaining after ultraviolet irradiation is sufficiently small, and display failure due to a change in pretilt angle becomes difficult to occur, and display failure of a PSA-type or PSVA-type liquid crystal display element does not occur or becomes extremely small. At S 11 、S 12 S and S 13 In the case of 1 to 3 carbon atoms, the liquid crystal display element is suitable for NPS type liquid crystal display elements.
The lower limit of the content of the polymerizable compound represented by the general formula (RM) in the liquid crystal composition of the present invention is preferably 0.01 mass%, preferably 0.02 mass%, preferably 0.03 mass%, preferably 0.04 mass%, preferably 0.05 mass%, preferably 0.06 mass%, preferably 0.07 mass%, preferably 0.08 mass%, preferably 0.09 mass%, preferably 0.1 mass%, preferably 0.12 mass%, preferably 0.15 mass%, preferably 0.17 mass%, preferably 0.2 mass%, preferably 0.22 mass%, preferably 0.25 mass%, preferably 0.27 mass%, preferably 0.3 mass%, preferably 0.32 mass%, preferably 0.35 mass%, preferably 0.37 mass%, preferably 0.4 mass%, preferably 0.42 mass%, preferably 0.45 mass%, preferably 0.5 mass%, preferably 0.55 mass%. The upper limit of the content of the polymerizable compound represented by the general formula (RM) in the liquid crystal composition of the present invention is preferably 5% by mass, preferably 4.5% by mass, preferably 4% by mass, preferably 3.5% by mass, preferably 3% by mass, preferably 2.5% by mass, preferably 2% by mass, preferably 1.5% by mass, preferably 1% by mass, preferably 0.95% by mass, preferably 0.9% by mass, preferably 0.85% by mass, preferably 0.8% by mass, preferably 0.75% by mass, preferably 0.7% by mass, preferably 0.65% by mass, preferably 0.6% by mass, preferably 0.55% by mass, preferably 0.5% by mass, preferably 0.45% by mass, preferably 0.4% by mass.
Further specifically, the content is preferably 0.2 to 0.6 mass% when a sufficient pretilt angle or a small residual amount of the polymerizable compound or a high Voltage Holding Ratio (VHR) is obtained, and the content is preferably 0.01 to 0.4 mass% when suppression of precipitation at low temperature is important. In particular, in the case where a rapid response speed is obtained, the content thereof is preferably increased to 2 mass%.
In the case of containing a plurality of polymerizable compounds represented by the general formula (RM), the content of each is preferably 0.01 to 0.4% by mass. Therefore, in order to solve all of these problems, it is particularly preferable to adjust the polymerizable compound represented by the general formula (RM) to a range of 0.1 to 0.6 mass%.
The polymerizable compound represented by the general formula (RM) according to the present invention is preferably a compound represented by the general formulae (RM-1) to (RM-10),
[ chemical 22]
[ chemical 23]
[ chemical 24]
In PSA-type liquid crystal display elements using these, the residual amount of polymerizable compound is small, the pretilt angle is sufficiently set, and there are no or very few defects such as alignment defects and display defects due to changes in pretilt angle.
The liquid crystal composition of the present invention contains 1 or 2 or more compounds having a terphenyl structure or a tetrabenzene structure and having a dielectric anisotropy Δεof greater than +2, that is, compounds having positive dielectric anisotropy. The Δε of the compound was the following value: a value extrapolated from a measured value of dielectric anisotropy of a composition obtained by adding the compound to a composition that is substantially dielectric neutral at 25 ℃. The compound can be used in combination with desired properties such as solubility at low temperature, transfer temperature, electrical reliability, refractive index anisotropy, and the like, and in particular, the reactivity of the polymerizable compound in the liquid crystal composition containing the polymerizable compound can be accelerated.
The lower limit of the preferable content of the compound having a terphenyl structure or a tetrabiphenyl structure and having a dielectric constant anisotropy Δεof more than +2 relative to the total amount of the liquid crystal composition of the present invention is 0.1%, 0.5%, 1%, 1.5%, 2%, 2.5%, 3%, 4%, 5%, 10%. The upper limit of the preferable content relative to the total amount of the liquid crystal composition of the present invention is, for example, 20%, 15%, 10%, 9%, 8%, 7%, 6%, 5%, 4%, 3% in one embodiment of the present invention.
As the compound having a terphenyl structure or a tetrabiphenyl structure and having a dielectric constant anisotropy of more than +2 which can be used in the liquid crystal composition of the present invention, for example, the compound represented by the formulae (M-8.51) to (M-8.54), the compound represented by the formulae (M-7.1) to (M-7.4), the compound represented by the formulae (M-7.11) to (M-7.14), and the compound represented by the formulae (M-7.21) to (M-7.24) are preferably contained.
[ chemical 25]
[ chemical 26]
[ chemical 27]
[ chemical 28]
To increase T of liquid crystal composition Ni The liquid crystal composition according to the present invention may contain the following compounds: compounds of formula (L-7.1) to formula (L-7.4), formula (L-7.11) to formula (L-7.13), formula (L-7.21) to formula (L-7.23), formula (L-7.31) to formula (L-7.34), formula (L-7.41) to formula (L-7.44), and formula (L-7.51) to formula (L-7.53) have a 4-ring dielectric constant of substantially zero (approximately in the range of-2 to +2).
[ chemical 29]
[ chemical 30]
[ 31]
[ chemical 32]
[ 33]
[ chemical 34]
In addition to the above-mentioned compounds, the liquid crystal composition of the present invention may contain a usual nematic liquid crystal, smectic liquid crystal, cholesteric liquid crystal, antioxidant, ultraviolet absorber, light stabilizer, infrared absorber, or the like.
Examples of the antioxidants include hindered phenols (hindered phenols) represented by the general formulae (H-1) to (H-4).
[ 35]
In the general formulae (H-1) to (H-3), R H1 Each independently represents an alkyl group having 1 to 10 carbon atoms, an alkoxy group having 1 to 10 carbon atoms, an alkenyl group having 2 to 10 carbon atoms or an alkenyloxy group having 2 to 10 carbon atoms, 1-CH being present in the groups 2 -or non-contiguous more than 2-CH 2 Each independently substituted by-O-or-S-and, in addition, 1 or more than 2 hydrogen atoms present in the radical may each independently be substituted by fluorine or chlorine atoms. More specifically, an alkyl group having 2 to 7 carbon atoms, an alkoxy group having 2 to 7 carbon atoms, an alkenyl group having 2 to 7 carbon atoms, or an alkenyloxy group having 2 to 7 carbon atoms is preferable, and an alkyl group having 3 to 7 carbon atoms or an alkenyl group having 2 to 7 carbon atoms is more preferable.
In the general formula (H-4), M H4 Represents a single bond or an alkylene group having 1 to 10 carbon atoms, a 1, 4-phenylene group (any hydrogen atom in the group may be substituted with a fluorine atom), or a trans-1, 4-cyclohexylene group.
In the general formulae (H-1) to (H-4), 1 or non-adjacent 2 or more-ch=groups in the 1, 4-phenylene groups may be substituted with-n=groups. In addition, the hydrogen atoms in the 1, 4-phenylene group may be each independently substituted with a fluorine atom or a chlorine atom.
General formula (H-2)1 or non-contiguous more than 2-CH in 1, 4-cyclohexylene group in the general formula (H-4) 2 -may be substituted by-O-or-S-. In addition, the hydrogen atoms in the 1, 4-cyclohexylene group may be each independently substituted with a fluorine atom or a chlorine atom.
More specifically, for example, the formulae (H-11) to (H-15) can be cited.
[ 36]
When the liquid crystal composition of the present invention contains an antioxidant, the lower limit of the content thereof is 5 mass ppm, preferably 10 mass ppm, preferably 20 mass ppm, preferably 50 mass ppm, and the upper limit of the content thereof is 2000 mass ppm, preferably 1000 mass ppm, preferably 500 mass ppm, preferably 100 mass ppm.
When the liquid crystal composition of the present invention contains a light stabilizer, a hindered amine-based Tinuvin770 (manufactured by BASF) or LA-57 (manufactured by ADEKA) may be used, and the lower limit of the content thereof is preferably 50 mass ppm or more, preferably 100 mass ppm or more, preferably 200 mass ppm or more, and the upper limit of the content thereof is 2000 mass ppm, preferably 1000 mass ppm, preferably 500 mass ppm.
Nematic phase-isotropic liquid phase transition temperature (T) of the liquid crystal composition of the present invention NI ) From 60℃to 120℃and more preferably from 70℃to 110℃and particularly preferably from 70℃to 85 ℃. In the case of liquid crystal television applications, T NI Preferably 70 to 80 ℃, T in the case of mobile applications NI Preferably 75 to 90 ℃, T in the case of vehicle-mounted use, PID (public information display ), etc NI Preferably from 90 to 110 ℃.
The liquid crystal composition of the present invention has a refractive index anisotropy (Δn) at 20 ℃ of 0.080 to 0.140, more preferably 0.090 to 0.130, particularly preferably 0.100 to 0.120.
The liquid crystal composition of the present invention has a rotational viscosity (. Gamma.) at 20 ℃ 1 ) 50 to 160 mPas, preferably 55 to 160 mPas, preferably 60 to 160 mPas, preferably 80 to 150 mPas, preferably90 to 140 mPas, preferably 90 to 130 mPas, preferably 90 to 120 mPas.
The liquid crystal composition of the present invention has a dielectric anisotropy (. DELTA.. Epsilon.) of from-1.5 to-4.0, preferably from-1.5 to-3.5, more preferably from-1.7 to-3.2, more preferably from-1.7 to-3.0, more preferably from-1.7 to-2.7, and particularly preferably from-1.7 to-2.5 at 20 ℃.
The liquid crystal display element using the liquid crystal composition of the present invention is useful particularly for an active matrix driving liquid crystal display element, and can be suitably used for a liquid crystal display element such as VA, FFS, IPS, PSA, PSVA, PS-IPS or PS-FFS, NPS, PI-less.
The liquid crystal display element of the present invention preferably includes a 1 st substrate and a 2 nd substrate which are disposed to face each other, a common electrode provided on the 1 st substrate or the 2 nd substrate, a pixel electrode provided on the 1 st substrate or the 2 nd substrate and having a thin film transistor, and a liquid crystal layer provided between the 1 st substrate and the 2 nd substrate and containing a liquid crystal composition. Optionally, an alignment film for controlling the alignment direction of the liquid crystal molecules may be provided on the opposite surface side of at least one of the 1 st substrate and the 2 nd substrate so as to be in contact with the liquid crystal layer. As the alignment film, a vertical alignment film, a horizontal alignment film, or the like may be appropriately selected in accordance with the driving mode of the liquid crystal display element, and a known alignment film such as a rubbing alignment film (for example, polyimide) or a photo alignment film (for example, decomposed polyimide) may be used. Further, a color filter may be provided on the 1 st substrate or the 2 nd substrate, and a color filter may be provided on the pixel electrode or the common electrode.
As the 2-sheet substrate used for the liquid crystal cell of the liquid crystal display element according to the present invention, glass or a transparent material having flexibility such as plastic may be used, and one of them may be an opaque material such as silicon. The transparent substrate having the transparent electrode layer can be obtained by, for example, sputtering Indium Tin Oxide (ITO) on a transparent substrate such as a glass plate.
The color filter can be produced by, for example, pigment dispersion, printing, electrodeposition, dyeing, or the like. In the case of describing a method of producing a color filter by a pigment dispersion method as an example, the curable coloring composition for a color filter is applied to the transparent substrate, subjected to patterning treatment, and then cured by heating or light irradiation. By performing this step for each of the 3 colors of red, green, and blue, a pixel portion for a color filter can be manufactured. In addition, pixel electrodes including active elements such as TFTs, thin film diodes, and metal-insulator-metal resistor elements may be provided on the substrate.
The 1 st substrate and the 2 nd substrate are preferably opposed to each other with the common electrode and the pixel electrode layer inside.
The spacing between the 1 st substrate and the 2 nd substrate can be adjusted by the spacers. In this case, the thickness of the obtained light control layer is preferably adjusted so that the thickness is 1 to 100. Mu.m. More preferably 1.5 to 10. Mu.m, when a polarizing plate is used, the product of the refractive index anisotropy Deltan of the liquid crystal and the cell thickness d is preferably adjusted so that the contrast ratio becomes maximum. In addition, when two polarizing plates are provided, the polarizing axis of each polarizing plate can be adjusted so that the viewing angle and contrast are good. Further, a retardation film for expanding the viewing angle may be used. Examples of the spacer include: glass particles, plastic particles, alumina particles, photoresist (photoresist) materials, and the like. Then, a sealant such as an epoxy thermosetting composition is screen-printed on the substrates in a shape provided with a liquid crystal injection port, and the substrates are bonded to each other, and the sealant is thermally cured by heating.
As a method for sandwiching the liquid crystal composition between 2 substrates, a general vacuum injection method, an ODF method, or the like can be used.
In order to form the alignment state of the liquid crystal display element of the present invention, the liquid crystal display element can be produced by using a liquid crystal composition containing a polymerizable compound in a liquid crystal composition and polymerizing the polymerizable compound in the liquid crystal composition.
The method for polymerizing the polymerizable compound contained in the liquid crystal composition of the present invention is preferably the following method: in order to obtain good alignment performance of the liquid crystal layer, it is desirable to polymerize at a proper polymerization rate, and therefore, the liquid crystal layer is polymerized by irradiation of active energy rays such as ultraviolet rays or electron beams singly or in combination or sequentially. In the case of using ultraviolet rays, a polarized light source may be used, and a non-polarized light source may also be used. In addition, in the case of polymerization in a state where the liquid crystal composition is sandwiched between 2 substrates, at least the substrate on the irradiation surface side must have appropriate transparency to active energy rays. In addition, the following means may be used: after polymerizing only a specific portion using a mask at the time of light irradiation, conditions such as an electric field, a magnetic field, or a temperature are changed, whereby the orientation state of the unpolymerized portion is changed, and further an active energy ray is irradiated to polymerize. In particular, when ultraviolet exposure is performed, it is preferable to perform ultraviolet exposure while applying an alternating electric field to the liquid crystal composition. The applied alternating electric field is preferably alternating current with a frequency of 10Hz to 10kHz, more preferably with a frequency of 60Hz to 10kHz, the voltage being selected depending on the desired pretilt angle of the liquid crystal display element. That is, the pretilt angle of the liquid crystal display element can be controlled by the applied voltage. In the case of a PSVA type liquid crystal display element, the pretilt angle is preferably controlled to 80 to 89.9 degrees from the viewpoints of alignment stability and contrast.
The temperature at which the active energy rays such as ultraviolet rays and electron beams are irradiated for polymerizing the polymerizable compound contained in the liquid crystal composition of the present invention is not particularly limited. For example, when the liquid crystal composition of the present invention is applied to a liquid crystal display element having a substrate with an alignment film, it is preferable that the liquid crystal composition is maintained in a liquid crystal state within a temperature range. It is preferably polymerized at a temperature close to room temperature, i.e., typically 15 to 35 ℃.
On the other hand, for example, when the liquid crystal composition of the present invention is applied to a liquid crystal display element having a substrate without an alignment film, the temperature range may be wider than the above-described temperature range when the composition is applied to the liquid crystal display element having a substrate with an alignment film.
As the lamp for generating ultraviolet rays, a metal halogen lamp, a high-pressure mercury lamp, an ultra-high-pressure mercury lamp, or the like can be used. The wavelength of the irradiated ultraviolet light is preferably ultraviolet light in a wavelength region other than the absorption wavelength region of the liquid crystal composition, and if necessary, the ultraviolet light is preferably filtered off. Intensity of irradiated ultraviolet raysThe degree of rotation is preferably 0.1mW/cm 2 ～100W/cm 2 More preferably 2mW/cm 2 ～50W/cm 2 . The energy of the irradiated ultraviolet rays can be suitably adjusted, and is preferably 10mJ/cm 2 To 500J/cm 2 More preferably 100mJ/cm 2 ～200J/cm 2 . When ultraviolet rays are irradiated, the intensity may be changed. The time for irradiating ultraviolet rays may be appropriately selected depending on the intensity of the irradiated ultraviolet rays, and is preferably 10 seconds to 3600 seconds, more preferably 10 seconds to 600 seconds.
Examples
The present invention will be further described in detail with reference to the following examples, but the present invention is not limited to these examples. In the following examples and comparative examples, the term "%" means "% by mass". The following codes are used for the description of the compounds in the examples.
(side chain)
-n -C n H 2n+1 Straight-chain alkyl of carbon number n
n- C n H 2n+1 Linear alkyl of carbon number n
-On -OC n H 2n+1 Straight-chain alkoxy of carbon number n
nO- C n H 2n+1 Linear alkoxy of O-carbon number n
-V -CH＝CH 2
V- CH 2 ＝CH-
-V1 -CH＝CH-CH 3
1V- CH 3 -CH＝CH-
-F -F
-OCF3 -OCF 3
(linking group)
-CF2O- -CF 2 -O-
-OCF2- -O-CF 2 -
-1O- -CH 2 -O-
-O1- -O-CH 2 -
-2- -CH 2 -CH 2 -
-COO- -COO-
-OCO- -OCO-
-single bond
(Ring structure)
[ 37]
In the examples, the measured characteristics are as follows.
T NI : nematic phase-isotropic liquid phase transition temperature (. Degree. C.)
An: refractive index anisotropy at 20 DEG C
Δε: dielectric constant anisotropy at 20 DEG C
γ 1 : rotational viscosity at 20 ℃ (mPa. S)
K 11 : elastic constant K at 20 DEG C 11 (pN)
K 33 : elastic constant K at 20 DEG C 33 (pN)
RT: response speed (msec) when voltage is applied
VHR: voltage holding ratio at 70℃at 1V, 0.6Hz (%)
T: transmittance (%) when voltage is applied.
(results of preparation and evaluation of liquid Crystal composition)
Liquid crystal compositions of example 1 (LC-1), example 2 (LC-2), example 3 (LC-3) and comparative example 1 (LC-A) were prepared, and physical properties were measured. The composition ratios and physical property values of these liquid crystal compositions are shown in table 1.
TABLE 1
These liquid crystal compositions are described as K 11 K is as follows 33 The composition ratio was adjusted so that the physical properties were similar to each other.
Delta epsilon of example 1 (LC-1) is negative and T NI High, gamma 1 Small, delta n large, K 11 Is small. Due to gamma associated with response speed 1 /K 33 The value of (2) is smaller, thus implying a faster response speed. And (3) confirming: the FFS type and VA type liquid crystal display devices obtained using the liquid crystal composition of example 1 have a fast response speed, a high VHR and a high transmittance. In addition, it was confirmed that: these liquid crystal display elements have no display failure. That is, it is confirmed that: the liquid crystal composition of example 1 (LC-1) and a liquid crystal display element using the same solve the problems of the present invention. The cell thickness (d) of the liquid crystal display element is determined so that the value of retardation (Δnd) becomes 360.
A PSA-type liquid crystal display element was produced by preparing a polymerizable compound-containing liquid crystal composition obtained by mixing 99.7% of the liquid crystal composition of example 1 (LC-1) and 0.3% of the polymerizable compound (RM-1). The present invention was found to solve the problems of the present invention by showing the same physical properties. Further, the liquid crystal composition containing the polymerizable compound obtained by replacing the polymerizable compound (RM-1) with the polymerizable compound (RM-2), the polymerizable compound (RM-4), or the polymerizable compound (RM-5) also exhibits excellent effects in the same manner.
Delta epsilon of example 2 (LC-2) is negative and T NI High, gamma 1 Small, delta n large, K 11 Is small. And (3) confirming: the VA-mode liquid-crystal display device obtained using the liquid-crystal composition of example 2 has a fast response speed, a high VHR and a high transmittance. In addition, it was confirmed that: these liquid crystal display elements have no display failure. That is, it is confirmed that: the liquid crystal composition of example 2 (LC-2) and a liquid crystal display element using the same solve the problems of the present invention.
A PSA type liquid crystal display element was produced by preparing a polymerizable compound-containing liquid crystal composition obtained by mixing 99.6% of the liquid crystal composition of example 2 (LC-2) and 0.4% of the polymerizable compound (RM-2). It was confirmed that the problems of the present invention are also solved. Further, the liquid crystal composition containing the polymerizable compound obtained by replacing the polymerizable compound (RM-2) with the polymerizable compound (RM-1), the polymerizable compound (RM-4), or the polymerizable compound (RM-5) also exhibits excellent effects in the same manner.
Delta epsilon of example 3 (LC-3) is negative, T NI High, gamma 1 Small, delta n large, K 11 Is small. And (3) confirming: the VA-mode liquid-crystal display device obtained using the liquid-crystal composition of example 3 has a fast response speed, a high VHR and a high transmittance. In addition, it was confirmed that: these liquid crystal display elements have no display failure. That is, it is confirmed that: the liquid crystal composition of example 3 (LC-3) and a liquid crystal display element using the same solve the problems of the present invention.
A PSA-type liquid crystal display element was produced by preparing a polymerizable compound-containing liquid crystal composition obtained by mixing 99.75% of the liquid crystal composition of example 3 (LC-3) and 0.25% of the polymerizable compound (RM-4). It was confirmed that the problems of the present invention are also solved. Further, the liquid crystal composition containing the polymerizable compound obtained by replacing the polymerizable compound (RM-4) with the polymerizable compound (RM-1), the polymerizable compound (RM-2), or the polymerizable compound (RM-5) also exhibits excellent effects in the same manner.
A PSA-type liquid crystal display element was produced by preparing a liquid crystal composition containing a polymerizable compound obtained by mixing 99.72% of the liquid crystal composition of example 3 (LC-3) and 0.28% of the polymerizable compound (RM-12). It was confirmed that the problems of the present invention are also solved.
A PSA-type liquid crystal display element was produced by preparing a liquid crystal composition containing a polymerizable compound obtained by mixing 99.72% of the liquid crystal composition of example 3 (LC-3) and 0.28% of the polymerizable compound (RM-14). It was confirmed that the problems of the present invention are also solved.
A PSA-type liquid crystal display element was produced by preparing a liquid crystal composition containing a polymerizable compound obtained by mixing 99.72% of the liquid crystal composition of example 3 (LC-3) and 0.28% of the polymerizable compound (RM-15). It was confirmed that the problems of the present invention are also solved.
On the other hand, comparative example 1 (LC-A) is se:Sub>A liquid crystal composition containing 3-Cy-1O-Ph5-O2, K 11 Large. And (3) confirming: FFS type and VA type liquid crystal display elements obtained using the liquid crystal composition of comparative example 1 were low in VHR and transmittance, and display failure occurred. That is, it is confirmed that: the liquid crystal composition of comparative example 1 (LC-se:Sub>A) and the liquid crystal display element using the same cannot solve the problems of the present invention.
Further, se:Sub>A liquid crystal composition was prepared by replacing 3-Cy-1O-Ph5-O2 of comparative example 1 (LC-A) with 3-Cy-Cy-1O-Ph5-O2, and as se:Sub>A result, it was confirmed that the VA type liquid crystal display element had low VHR and low transmittance, and display failure occurred. That is, it is confirmed that: the liquid crystal composition containing 3-Cy-Cy-1O-Ph5-O2 and the liquid crystal display element using the same cannot solve the problems of the present invention.
Liquid crystal compositions of example 4 (LC-4), example 5 (LC-5), example 6 (LC-6) and comparative example 2 (LC-B) were prepared, and physical properties were measured. The composition ratios and physical property values of these liquid crystal compositions are shown in table 2.
TABLE 2
And (3) confirming: the problems of the present invention are solved by setting Δεof examples 4 (LC-4), 5 (LC-5) and 6 (LC-6) to be negative. On the other hand, confirm: the VHR of comparative example 2 (LC-B) was 76%, and the problem could not be solved.
A PSA-type liquid crystal display element was produced by preparing a polymerizable compound-containing liquid crystal composition obtained by mixing 99.6% of the liquid crystal composition of example 4 (LC-4) and 0.4% of the polymerizable compound (RM-1). It was confirmed that the problems of the present invention are also solved.
A PSA type liquid crystal display element was produced by preparing a polymerizable compound-containing liquid crystal composition obtained by mixing 99.6% of the liquid crystal composition of example 4 (LC-4) and 0.4% of the polymerizable compound (RM-2). It was confirmed that the problems of the present invention are also solved.
A PSA-type liquid crystal display element was produced by preparing a polymerizable compound-containing liquid crystal composition obtained by mixing 99.6% of the liquid crystal composition of example 4 (LC-4) and 0.4% of the polymerizable compound (RM-3). It was confirmed that the problems of the present invention are also solved.
A PSA-type liquid crystal display element was produced by preparing a liquid crystal composition containing a polymerizable compound obtained by mixing 99.6% of the liquid crystal composition of example 4 (LC-4) and 0.4% of the polymerizable compound (RM-4). It was confirmed that the problems of the present invention are also solved.
A PSA type liquid crystal display element was produced by preparing a polymerizable compound-containing liquid crystal composition obtained by mixing 99.6% of the liquid crystal composition of example 4 (LC-4) and 0.4% of the polymerizable compound (RM-5). It was confirmed that the problems of the present invention are also solved.
In example 5 (LC-5), the same experiment as in example 4 was also performed, and it was confirmed that the problem of the present invention was solved.
In example 6 (LC-6), the same experiment as in example 4 was also performed, and it was confirmed that the problem of the present invention was solved.
A liquid crystal composition containing a polymerizable compound was prepared by mixing 99.65% of the liquid crystal composition of example 6 (LC-6) and 0.35% of the polymerizable compound (RM-11), and a PSA-type liquid crystal display element was produced. It was confirmed that the problems of the present invention are also solved.
A PSA type liquid crystal display element was produced by preparing a polymerizable compound-containing liquid crystal composition obtained by mixing 99.65% of the liquid crystal composition of example 6 (LC-6) and 0.35% of the polymerizable compound (RM-12). It was confirmed that the problems of the present invention are also solved.
A PSA type liquid crystal display element was produced by preparing a polymerizable compound-containing liquid crystal composition obtained by mixing 99.65% of the liquid crystal composition of example 6 (LC-6) and 0.35% of the polymerizable compound (RM-14). It was confirmed that the problems of the present invention are also solved.
A liquid crystal composition containing a polymerizable compound was prepared by mixing 99.65% of the liquid crystal composition of example 6 (LC-6) and 0.35% of the polymerizable compound (RM-15), and a PSA-type liquid crystal display element was produced. It was confirmed that the problems of the present invention are also solved.
Comparative example 2 (LC-B) was a liquid crystal composition containing 3-Cy-Cy-1O-Ph5-O2, and it was confirmed that: FFS type and VA type liquid crystal display elements produced using the same have low VHR and low transmittance, and display failure occurs. That is, it is confirmed that: the liquid crystal composition of comparative example 2 (LC-B) and the liquid crystal display element using the same cannot solve the problems of the present invention.
Symbol description
1. Transmittance of liquid crystal display element using liquid crystal composition of (LC-1)
2. Transmittance of liquid crystal display element using liquid crystal composition of (LC-2)
3. Transmittance of liquid crystal display element using liquid crystal composition of (LC-3)
Claims (13)
1. A liquid crystal composition comprising 1 or 2 or more compounds represented by the general formula (S1), 1 or 2 or more compounds represented by the general formula (S2), 1 or 2 or more compounds represented by the general formula (S3), 10 to 50 mass% of the compound represented by the general formula (S1), 14 to 34 mass% of the compound represented by the general formula (S2), 19 to 39 mass% of the compound represented by the general formula (S3), 3 to 30 mass% of the compound represented by the general formula (NU-05), 1 to 20 mass% of the compound represented by the general formula (NU-03-1), 0 to 20 mass% of the compound represented by the general formula (NU-03-2), 1 to 25 mass% of the compound represented by the general formula (NU-02-1), the total mass of these components being 85 to 100 mass% and the anisotropy delta is negative epsilon,
Wherein R is S1 R is R S2 Each independently represents an alkyl group having 1 to 8 carbon atoms or an alkoxy group having 1 to 8 carbon atoms, R S3 R is R S5 Each independently represents an alkyl group having 1 to 8 carbon atoms, an alkoxy group having 1 to 8 carbon atoms or an alkenyl group having 2 to 8 carbon atoms, R S4 R is R S6 Each independently represents an alkyl group having 1 to 8 carbon atoms or an alkoxy group having 1 to 8 carbon atoms,
wherein R is NU51 、R NU52 Independently represent an alkyl group having 1 to 8 carbon atoms and a carbon atomAlkoxy of 1 to 8, alkenyl of 2 to 8 carbon atoms, alkenyloxy of 2 to 8 carbon atoms, 1 of the groups or non-contiguous 2 or more-CH 2 Can be independently and individually substituted by-CH=CH-, -C≡C-, -O-, -CO-, -COO-or-OCO-substitution,
2. the liquid crystal composition according to claim 1, wherein the total content of the compounds represented by the general formulae (S2) and (S3) in the total amount of the compounds having the structures represented by the formulae (NS-1) to (NS-4) in the molecule in the liquid crystal composition is 90% by mass or more,
wherein the other structures are combined at the same point.
3. The liquid crystal composition according to claim 1 or 2, which contains 1 or 2 or more compounds selected from the group of compounds represented by the general formulae (NU-02) to (NU-04), the general formulae (NU-06) and (NU-07),
Wherein R is NU21 、R NU22 、R NU31 、R NU32 、R NU41 、R NU42 、R NU61 、R NU62 、R NU71 R is R NU72 Independently represent alkyl group having 1 to 8 carbon atoms, alkoxy group having 1 to 8 carbon atoms, or compound having 2 to 8 carbon atoms8 alkenyl groups, alkenyloxy groups having 2 to 8 carbon atoms, 1 of the groups being non-contiguous with more than 2-CH 2 -may each be independently substituted by-ch=ch-, -c≡c-, -O-, -CO-, -COO-, or-OCO-.
4. The liquid crystal composition according to claim 3, wherein the total content of the compounds represented by the general formulae (S1), (S2), (S3), (NU-02), (NU-03), (NU-04), (NU-05), (NU-06) and (NU-07) in the liquid crystal composition is 95 to 100% by mass based on the entire liquid crystal composition.
5. The liquid crystal composition according to claim 3, wherein the total content of the compounds represented by the general formulae (S1), (S2), (S3), (NU-02), (NU-03), (NU-05), (NU-06) and (NU-07) in the liquid crystal composition is 85 to 100% by mass based on the whole liquid crystal composition.
6. The liquid crystal composition according to claim 1 or 2, which contains 1 or 2 or more compounds having a terphenyl structure or a tetrabenzoyl structure and having a dielectric constant anisotropy Δεof greater than +2.
7. The liquid crystal composition according to claim 1 or 2, which contains 1 or 2 or more compounds represented by the formulae (NU-05-1) to (NU-05-10) as the compound represented by the general formula (NU-05),
8. the liquid crystal composition according to claim 1 or 2, wherein the compound represented by the general formula (S1) is a compound represented by the formula (S1-1), the formula (S1-2) or the formula (S1-3),
9. the liquid crystal composition according to claim 1, which has refractive index anisotropy Δn in the range of 0.100 to 0.120.
10. The liquid crystal composition according to claim 1, which has a dielectric constant anisotropy Δεranging from-1.7 to-2.5.
11. A liquid crystal display element using the liquid crystal composition according to any one of claims 1 to 9.
12. A liquid crystal display element for active matrix driving using the liquid crystal composition according to any one of claims 1 to 9.
13. A VA-type, IPS-type, FFS-type, PSA-type or PSVA-type liquid crystal display element using the liquid crystal composition according to any one of claims 1 to 9.
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| Publication number | Publication date |
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| CN111183205A (en) | 2020-05-19 |
| WO2019102859A1 (en) | 2019-05-31 |
| TWI786218B (en) | 2022-12-11 |
| JP6525227B1 (en) | 2019-06-05 |
| TW201925432A (en) | 2019-07-01 |
| JPWO2019102859A1 (en) | 2019-12-12 |
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