WO2007077872A1 - 液晶組成物および液晶表示素子 - Google Patents
液晶組成物および液晶表示素子 Download PDFInfo
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- WO2007077872A1 WO2007077872A1 PCT/JP2006/326054 JP2006326054W WO2007077872A1 WO 2007077872 A1 WO2007077872 A1 WO 2007077872A1 JP 2006326054 W JP2006326054 W JP 2006326054W WO 2007077872 A1 WO2007077872 A1 WO 2007077872A1
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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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- 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
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- 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
- C09K19/08—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
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- 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
- C09K19/42—Mixtures of liquid crystal compounds covered by two or more of the preceding groups C09K19/06 - C09K19/40
- 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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- 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
- C09K2019/121—Compounds containing phenylene-1,4-diyl (-Ph-)
- C09K2019/123—Ph-Ph-Ph
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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
- C09K19/3001—Cyclohexane rings
- C09K19/3003—Compounds containing at least two rings in which the different rings are directly linked (covalent bond)
- C09K2019/301—Cy-Cy-Ph
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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
- C09K19/3001—Cyclohexane rings
- C09K19/3003—Compounds containing at least two rings in which the different rings are directly linked (covalent bond)
- C09K2019/3016—Cy-Ph-Ph
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- C—CHEMISTRY; METALLURGY
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- C09K2323/00—Functional layers of liquid crystal optical display excluding electroactive liquid crystal layer characterised by chemical composition
Definitions
- Liquid crystal composition and liquid crystal display element Liquid crystal composition and liquid crystal display element
- the present invention relates to a liquid crystal composition and a liquid crystal display element. More specifically, the present invention relates to a liquid crystal composition suitable for a liquid crystal display element driven mainly by an AM (active matrix) method, and a liquid crystal display element containing the composition.
- AM active matrix
- a liquid crystal display element (in the present invention, a liquid crystal display element means a general term for a liquid crystal display panel and a liquid crystal display module) is an optical anisotropy and dielectric anisotropy of a liquid crystal composition.
- the operating modes of this liquid crystal display element include PC (phase change) mode, TN (twisted nematic) mode, STN (super twisted nematic) mode 1 to BTN (Bist aole twisted nematic) ) mode 1 to de, ECB (electrically controlled birerrmgence) mode 1 to de, ⁇ _CB (optically compensated bend) mode 1 to de, IPS (in-plane switching) mode 1 to de, VA (vertica 1 alignment) mode, such as Various modes are known.
- TN mode In the TN mode, STN mode, etc., a composition having a positive dielectric anisotropy is used.
- VA mode a composition having negative dielectric anisotropy is used.
- IPS mode a composition having positive or negative dielectric anisotropy is used.
- the ECB mode, IPS mode, VA mode, etc. in which a composition having a negative dielectric anisotropy is used, are the viewing angles that are disadvantages of conventional display modes such as TN mode and STN mode. It is known that the narrowness can be improved.
- liquid crystal compound means a compound having a liquid crystal phase such as a nematic phase or a smectic phase, and a compound having no liquid crystal phase but useful as a liquid crystal composition. It means the generic name. The content ratio of the component is calculated based on the total weight of the liquid crystal compound.
- the liquid crystal compound in this case is a compound represented by the following formula (A). The compound may be optically active.
- R and R are each independently hydrogen, alkyl, alkoxy, alkoxyalkyl, alkoxyalkoxy, acyloxy, acyloxyalkyl, alkoxycarbonyl, alkoxycarbonylalkyl, alkenyl, Alkenyloxy, nitroalkenyloxyalkyl, alkoxyalkenyl, alkynyl, alkynyloxy, cyanide_NCS, fluorine, or chlorine.
- the carbon number is 10 or less.
- arbitrary hydrogen may be replaced by fluorine or chlorine, and the total of the replaced fluorine and chlorine is 1 to 11:
- ring A is 1,4-cyclohexylene, 1,4-phenylene, pyran-1,2,5-diyl, 1,3-dioxane-2,5-dinole, pyridine 2, 5 Ginole, Pyrimidine 1,2,5 Ginole, Decahydronaphthalene 2,6 Ginole, 1, 2, 3, 4 Tetrahydronaphthalene 2,6 Ginole, or Naphthalene 1,2,6 Dil.
- any hydrogen may be replaced with fluorine or chlorine.
- Y is a single bond, — (CH 2) —, —COO—, —OCO—, —CH 2 O—, —OCH—, —C
- n 1, 2, 3, or 4.
- Patent Document 3 discloses a liquid crystal composition containing a compound having a terphenyl structure.
- Patent Document 4 discloses a liquid crystal composition containing the first component of the present invention.
- Patent Documents 3 and 4 disclose only examples of liquid crystal compositions having a positive dielectric anisotropy, and liquid crystal compositions having a negative dielectric anisotropy are not studied at all.
- Patent Document 1 Patent No. 2811342
- Patent Document 2 Patent No. 1761492
- Patent Document 3 International Publication No. 2004/035710 Pamphlet
- Patent Document 4 International Publication No. 2005/007775 Pamphlet
- Patent Document 5 Japanese Patent Laid-Open No. 9 183974
- liquid crystal display elements in operation modes such as IPS mode and VA mode still have problems as display elements when compared with CRTs, and improvements in physical properties are desired.
- the display element operating in the above-described IPS mode or VA mode mainly includes a liquid crystal composition having negative dielectric anisotropy, but in order to further improve the above characteristics and the like.
- the liquid crystal composition preferably has the following characteristics (1) to (5).
- the temperature range of the nematic phase is related to the temperature range in which the liquid crystal display element is used.
- the liquid crystal display element containing a liquid crystal composition having a wide temperature range of the nematic phase as in (1) is a liquid crystal display element.
- the temperature range used as a display element can be widened.
- a liquid crystal display element containing a liquid crystal composition having a low viscosity as in (2) has a short response time. I can. When the response time of the liquid crystal display element is short, it can be suitably used for displaying moving images. In addition, when the liquid crystal composition is injected into the liquid crystal cell of the liquid crystal display element, the injection time can be shortened and workability can be improved.
- a liquid crystal display element containing a liquid crystal composition with appropriate optical anisotropy can have a high contrast ratio.
- a liquid crystal display element containing a liquid crystal composition having a large absolute value of dielectric anisotropy as in (4) can reduce the threshold voltage value, drive voltage, and power consumption.
- a liquid crystal display element containing a liquid crystal composition having a large specific resistance as in (5) can have a high voltage holding ratio and a high contrast ratio. Therefore, a liquid crystal composition having a large specific resistance value in the initial stage and a large specific resistance value even after being used for a long time is preferable.
- AM active matrix
- the present inventors have a first component that is a liquid crystalline compound having a terphenyl in which hydrogen is mono-substituted with fluorine, and a second component that is a specific liquid crystalline compound having 2,3 difluorophenylene.
- the liquid crystal composition containing a negative dielectric anisotropy has an appropriate optical anisotropy with a wide nematic phase temperature range, a low viscosity, and a large negative dielectric anisotropy.
- the present inventors have found that the value is large, and that the liquid crystal display element containing the composition has a large voltage holding ratio, and the present invention has been completed.
- [0021] a first component which is at least one compound selected from the group of compounds represented by the following formulas (11) to (13), and the following formulas (2-1) to A liquid crystal composition having negative dielectric anisotropy, comprising a second component which is at least one compound selected from the group of compounds represented by (2-3).
- a first component which is at least one compound selected from the group of compounds represented by the following formulas (11) to (13), and the following formulas (2-1) to A liquid crystal composition having negative dielectric anisotropy, comprising a second component which is at least one compound selected from the group of compounds represented by (2-3).
- R 1 is independently alkyl or alkenyl
- R 3 is independently Is alkyl
- R 2 , R 4 and R 5 are independently alkyl, alkenyl or alkoxy; Ring B is 1,4-cyclohexylene or 1,4_phenylene;
- Z 1 is independently a single bond, one (CH 3) —, —OCH—, or one CH 0. )
- the first component which is at least one compound selected from the group of compounds represented by the following formulas (1 1 1) to (1 1 3), the following formula (2-1 1) and formula Contains a second component that is at least one compound selected from the group of compounds represented by (2-2-1) and formula (2-2-2) A liquid crystal composition having negative dielectric anisotropy.
- R 1 is independently alkyl or alkenyl
- R 3 is independently alkyl
- R 2 and R 4 are independently alkyl, alkenyl, or alkoxy.
- the first component is at least one compound selected from the group of compounds represented by the above formulas (1 1 1) to (1 3), and the second component is the above At least one compound selected from the group of compounds represented by formula (2-1) and at least one compound selected from the group of compounds represented by formula (2-2) and formula (2-3) above.
- Item 2 The liquid crystal composition according to item [1], which is a mixture with two compounds.
- [0028] a first component that is at least one compound selected from the group of compounds represented by the following formulas (11) to (13), and the following formula (2-1-2), Liquid crystal having negative dielectric anisotropy, comprising a second component which is at least one compound selected from the group of compounds represented by formula (2-2-2) and formula (2-2-3) Composition.
- R 1 is independently alkyl or alkenyl
- R 3 is independently alkyl
- R 2 and R 4 are independently alkyl, alkenyl, or alkoxy.
- the first component is at least one compound selected from the group of compounds represented by the above formula (11), and the second component is the above formula (2-1 1 2), formula (2) — 2— 2) and formula (2— 2— Item 6.
- the first component is at least one compound selected from the group of compounds represented by the above formulas (11-11) to (11-3), and the second component is the above Item 6.
- the liquid crystal composition according to item [6] which is at least one compound selected from the group of compounds represented by formula (2_1_2) and formula (2_2_3).
- the first component is at least one compound selected from the group of compounds represented by the above formula (1 1 1), and the second component is the above formula (2-1 2) and formula Item 2.
- the content of the first component is 5 to 40% by weight and the content of the second component is 60 to 95% by weight based on the total weight of the liquid crystal compound.
- the liquid crystal composition according to any one of [1] to [9].
- the compound group represented by the following formula (3) contains a third component that is at least one compound selected from the group of forces [1]
- the liquid crystal composition according to any one of [9].
- R 6 is alkyl or alkenyl
- R 7 is alkyl, alkenyl or alkoxy
- Ring C and Ring D are independently 1,4-cyclohexylene, 1,4_phenylene, 2_fluor _1,4-phenylene, or 3-funoleo 1,4_ Bilen;
- P is 0 or 1.
- the third component is selected from the group of compounds represented by the following formulas (3-1) to (3-13): Item 12.
- R 6 is independently alkyl or alkenyl
- R 7 is independently alkyl, alkenyl or alkoxy.
- [0045] From a first component that is at least one compound selected from the group of compounds represented by the following formula (11), and a group of compounds represented by the following formula (2-1-11) A second mixture which is a mixture of at least one selected compound and at least one compound selected from the group of compounds represented by the following formula (2-2-1) and formula (2-2-2) A component, at least one compound selected from the group of compounds represented by the following formula (3-1), and at least one compound selected from the group of compounds represented by the following formula (3-4): A liquid crystal composition having negative dielectric anisotropy, comprising a third component which is a mixture of the above.
- R 1 and R 6 are independently alkyl or alkenyl
- R 3 is independently alkyl
- R 2 , R 4 and R 7 are independently alkyl, alkenyl, or alkoxy.
- liquid crystal compound component is at least one compound selected from the group of compounds represented by formula (11) according to item [1], and item [1]
- a second component which is at least one compound selected from the group of compounds represented by formula (2-1) to formula (2-3), and formula (3-1) to formula (12) according to item [12]
- a liquid crystal composition comprising only a third component which is at least one compound selected from the group of compounds represented by (3-13).
- [0048] [22]: a first component that is at least one compound selected from the group of compounds represented by the following formulas (1_1) to (1_3); ) And the second component which is at least one compound selected from the compound group represented by formula (2-2-3) and the compound group represented by formula (3-1) below
- R 1 and R 6 are independently alkyl or alkenyl; R 3 is independently alkyl;
- R 2 , R 4 and R 7 are independently alkyl, alkenyl, or alkoxy.
- the first component is at least one compound selected from the group of compounds represented by the above formula (11-1), and the second component is the above formula (2_1_2) and formula (2 _ 2_ 3) is at least one compound selected from the compound group represented by formula (3-1), and the third component is at least one compound selected from the compound group represented by formula (3-1) above The liquid crystal composition according to item [22].
- the content ratio of the first component is 5 to 30% by weight
- the content ratio of the second component is 50 to 90% by weight
- liquid crystal compound component is at least one compound selected from the group of compounds represented by the above formula (11), the above formula (2-1), and the formula ( Item 2.
- the liquid crystal composition according to item [1] which only has a second component that is at least one compound selected from the group of compounds represented by 2-2) and formula (2-3).
- a liquid crystal display element comprising the liquid crystal composition according to any one of items [1] to [27].
- the liquid crystal composition of the present invention has an appropriate optical anisotropy in which the temperature range of the nematic phase is widened, a large negative dielectric anisotropy and a large specific resistance. Further, the above composition is excellent in the balance of these characteristics.
- the liquid crystal composition of the present invention can lower the minimum temperature of the nematic phase, Optical anisotropy can be increased.
- the liquid crystal composition of the present invention can preferably have an optical anisotropy in the range of 0.08 to 0.15.
- the liquid crystal composition of the present invention preferably has a dielectric constant anisotropy. 5. Can be in the range of 0 to 1.5.
- the liquid crystal display element of the present invention contains the above composition and has a high voltage holding ratio.
- liquid crystal display element contains a composition having the above characteristics
- a liquid crystal display element (hereinafter referred to as “AM element”) driven by an active matrix (AM) method having an operation mode such as a VA mode or an IPS mode. It can also be used conveniently.
- AM element liquid crystal display element driven by an active matrix (AM) method having an operation mode such as a VA mode or an IPS mode. It can also be used conveniently.
- the liquid crystal composition of the present invention includes a first component which is a liquid crystal compound having a terphenyl in which one or two hydrogens are replaced by fluorine, and a specific liquid crystal compound having 2,3-difluorophenylene And a second component, which is a liquid crystal compound having a specific structure, if necessary.
- the first component of the liquid crystal composition of the present invention includes at least one terphenyl having one or two hydrogens represented by the following formulas (1 1 1) to (1 3) replaced with fluorine. It is a liquid crystal compound.
- R 1 and R 2 are independently defined as follows.
- R 1 is independently alkyl or alkenyl
- R 2 is independently alkyl, alkenyl or alkoxy.
- alkyls having 1 to 20 carbon atoms are preferable: alkyls having! To 10 alkyls are more preferable methyl, ethyl, propyl, butyl, pentyl, hexyl, heptyl, Or octyl is more preferred, and ethyl, propyl, butyl, pentyl, or heptyl is particularly preferred.
- alkenyl having 2 to 20 carbon atoms is preferred, and alkenyl having 2 to 10 carbon atoms is more preferred.
- Bull, 1-propenyl, 2-propenyl, 1-butenyl, More preferred are 2 butenyl, 3 butenyl, 1 pentenyl, 2 pentenyl, 3 pentenyl, 4 _penteninole, 1 _hexeninore, 2 _hexeninore, 3 _hexeninore, 4 _hexeninole, or 5—hexenyl Gubure, 1_propenyl, 3-buter, or 3_pentur are particularly preferred.
- _CH CH— depends on the position of the double bond.
- R 1 or R 2 is 1_propenyl, 1-butyr, 1_pentur, 1_hexenyl, 3_pentenyl
- a trans configuration is preferred when the position number of the carbon where the double bond begins, such as 3-hexenyl, is odd.
- the cis configuration is preferred when R 1 or R 2 is an even number of carbons where the double bond begins, such as 2-butur, 2-pentur, 2-hexenyl, or 4-hexenyl.
- alkoxy having 1 to 20 carbon atoms is preferable.
- Methoxy, ethoxy, or butoxy with methoxy, ethoxy, propoxy, butoxy, pentyloxy, hexyloxy, or heptyloxy being more preferred, with 0 alkoxy being more preferred.
- the compounds represented by the above formulas (11) to (13) have a terphenyl structure in which one or two hydrogens are replaced by fluorine.
- the liquid crystal composition according to the present invention can increase the upper limit temperature of the nematic phase and increase the optical anisotropy.
- the liquid crystalline compounds represented by the above formulas (11) to (13) are higher in the upper limit temperature of the nematic phase than the general liquid crystalline compounds, and have a moderate viscosity.
- the anisotropy is large, the negative dielectric anisotropy is extremely small, and the specific resistance is large.
- the liquid crystal compound as the first component is a compound represented by the above formula
- the upper limit temperature of the nematic phase of the liquid crystal composition is further increased, and the optical anisotropy is increased. That can reduce the degree of rice occupancy.
- liquid crystalline compounds may be used alone or in combination as a first component.
- the second component of the liquid crystal composition of the present invention is at least one liquid crystal compound represented by the following formulas (2— :!) to (2-3).
- each of R 3 , R 4 , R 5 , ring B, and Z 1 is independently defined as follows.
- R 3 is independently alkyl or alkenyl.
- R 4 and R 5 are independently alkyl, alkenyl or alkoxy. Preferred embodiments of alkyl, alkenyl and alkoxy for R 3 , R 4 and R 5 are the same as those for R 1 and R 2 .
- Ring B is independently 1,4-cyclohexylene, or 1,4_phenylene.
- the configuration is preferably a trans configuration. .
- Z 1 is independently a single bond, one (CH 3) one, —OCH one, or one CHO 1.
- the compounds represented by the above formulas (2— :!) to (2-3) are characterized by having 1,4-cyclohexylene and 2,3-difluoro-1,4-phenylene. is there.
- the liquid crystal compound as the second component has such a structure, the dielectric anisotropy can be negatively increased in the liquid crystal composition according to the present invention.
- the liquid crystalline compound represented by the above formula (2-1) is not necessarily high in the upper limit temperature of the nematic phase as compared with a general liquid crystalline compound, but the viscosity is moderate to It is relatively large, has a medium optical anisotropy, has a medium to relatively large negative dielectric anisotropy, and has a large specific resistance.
- the liquid crystalline compound represented by the above formula (2-2) has a moderate to high upper limit temperature of the nematic phase and a large viscosity compared to a general liquid crystalline compound, Optical anisotropy is moderate to large, negative dielectric anisotropy is large, and specific resistance is large There is a feature.
- the liquid crystalline compound represented by the above formula (2-3) has a moderate upper limit temperature of the nematic phase and a large viscosity as compared with a general liquid crystalline compound. It is characterized by a medium to large optical anisotropy, a large negative dielectric anisotropy, and a large specific resistance.
- the compounds represented by the above formula (2-11-1), formula (2-2-1), and formula (2-2-2) are preferable. 1) 1) and a compound represented by the formula (2-2-1) are more preferable.
- the second component is the above compound, the dielectric anisotropy of the liquid crystal composition can be increased negatively, and the viscosity of the liquid crystal composition can be decreased.
- the first component is a compound represented by the above formula (11), and the second component is the above formula (2).
- _1_1), formula (2_2_1), and at least one compound selected from the group of compounds represented by formula (2_2_2), increase the dielectric anisotropy of the liquid crystal composition negatively
- the compounds represented by the above formula (2_1_2), formula (2_2-2), and formula (2-2-3) are liquid crystal compositions. This is preferable in that the dielectric anisotropy can be negatively increased and the viscosity of the liquid crystal composition can be reduced.
- the first component is a compound represented by the above formula (11), and the second component is the above formula (2).
- the dielectric anisotropy of the liquid crystal composition is negatively increased. It is preferable for decreasing the viscosity and lowering the lower limit temperature.
- the second component is represented by the formulas (2-1 2) and (2-2-3), it is preferable for lowering the minimum temperature and further reducing the viscosity.
- the first component is a compound represented by the above formula (1-1)
- the second component is at least one compound represented by the above formulas (2-1 2) and (2-2-3). In some cases, it is preferable to reduce the viscosity of the liquid crystal composition.
- R 4 in the above formula is preferably alkoxy.
- Examples of the compounds represented by these formulas (2_1) to (2_3) include the following formula (2_1_3), formula (2_2_4), formula (2_2_5), and formula (2_2_6).
- the dielectric of the liquid crystal composition The force S can be increased by increasing the negative anisotropy.
- liquid crystalline compounds may be used alone or in combination as the second component.
- the second component is at least one compound selected from the group of compounds represented by the above formula (2-1), and a compound represented by the above formulas (2-2) and (2-3).
- the dielectric anisotropy of the liquid crystal composition can be negatively increased, and the above-described formula (2—
- the upper limit temperature of the nematic phase can be changed by changing the content ratios of 1), formulas (2-2), and formulas (2-3).
- the optical anisotropy of the liquid crystal composition can be changed by changing the content ratio of the second component with respect to the total weight of the liquid crystal compound.
- the liquid crystal composition of the present invention further contains a third component, which is at least one liquid crystal compound represented by the following formula (3), as necessary.
- R 6 is alkyl or alkenyl
- R 7 is alkyl, alkenyl, or alkoxy. Preferred embodiments of these alkyl, alkenyl, and alkoxy are the same as those of R 1 and R 2 in the compounds represented by the formulas (11) to (13) of the first component.
- Ring C and Ring D are independently 1, 4-cyclohexylene, 1,4_phenylene, 2_fluor 1,4-phenylene, or 3-funoleone. —Fuenylene. P is 0 or 1.
- the viscosity of the liquid crystal composition according to the present invention can be reduced. Further, by changing the content ratio of the third component with respect to the total weight of the liquid crystal compound, the upper limit temperature of the nematic phase can be changed, and the optical anisotropy can be changed.
- R 6 and R 7 are the same as in the case of the compound represented by the above (3).
- the liquid crystalline compounds represented by the above formulas (3 ::!) To (3-3) are not so high in the upper limit temperature of the nematic phase as compared with general liquid crystalline compounds.
- the optical anisotropy is small to large with low viscosity, and the specific resistance pile with extremely small negative dielectric anisotropy is large.
- the liquid crystalline compounds represented by the above formulas (3-4) and (3-5) are higher in the upper limit temperature of the nematic phase and lower in viscosity than the general liquid crystalline compounds.
- the optical anisotropy is moderate to large, the negative dielectric anisotropy is extremely small, and the specific resistance is large.
- the liquid crystalline compounds represented by the above formulas (3-6) to (3-9) are not so high in the upper limit temperature of the nematic phase as compared with general liquid crystalline compounds.
- the optical anisotropy is small and the viscosity is medium to large, the negative dielectric anisotropy is small, and the specific resistance is large.
- the liquid crystalline compounds represented by the above formulas (3-10) to (3-13) are higher in the maximum temperature of the nematic phase than the general liquid crystalline compounds. It is moderate, optical anisotropy is medium to large, negative dielectric anisotropy is small to medium, and has a large specific resistance.
- the compounds represented by the above formulas (3— :!) to (3-5) are preferable because the minimum temperature of the nematic phase of the liquid crystal composition can be lowered and the viscosity can be further reduced.
- the compounds represented by the above formulas (3-6) to (3-13) lower the minimum temperature of the nematic phase of the liquid crystal composition and negatively increase the dielectric anisotropy. It is preferable because the viscosity can be reduced.
- the compounds represented by the above formulas (3-1) and (3-4) are preferable because the viscosity can be further reduced.
- liquid crystalline compounds may be used alone or in combination as a third component.
- the second component is represented by at least one compound selected from the group of compounds represented by the above formula (2-1-1 1), the above formula (2_2_1), and the formula (2_2_2)
- the viscosity can be further reduced.
- the upper limit temperature of the nematic phase can be changed by changing the content ratio of the third component with respect to the total weight of the liquid crystal compound.
- the second component is at least one compound selected from the group of compounds represented by the above formula (2_1_2) and formula (2_2_3), and the third component is When at least one compound selected from the group of compounds represented by the above formula (3-1) is used, the viscosity can be reduced.
- the first component is at least one compound selected from the group of compounds represented by the formula (11), and the second component is the formula (2-1 2) and the formula (2—
- the third component is at least one compound selected from the compound group represented by the above formula (31) Can negatively increase the dielectric anisotropy of the liquid crystal composition, decrease the viscosity, and decrease the minimum temperature.
- the upper limit temperature of the nematic phase can be changed by changing the content ratio of the third component with respect to the total weight of the liquid crystal compound.
- liquid crystal composition of the present invention combines the first component and the second component (hereinafter also referred to as "liquid crystal composition (1)").
- the dielectric anisotropy of the composition can be increased negatively, and the viscosity can be decreased.
- the liquid crystal composition of Example 6 of Patent Document 5 contains a liquid crystal compound in which hydrogen bonded to the carbon at the 4-position with respect to the carbon having a bonding group in the terminal ring is replaced by halogen. In addition, it contains a liquid crystalline compound with a total of four cyclohexylene and phenylene rings. Thus, in the terminal ring, a liquid crystal composition having an electron withdrawing group such as halogen or cyan at the 4-position with respect to carbon having a bonding group is included.
- the liquid crystal composition has a dielectric anisotropy. It tends to be positive or not negative, and the viscosity tends to increase.
- liquid crystal compounds having a total of four cyclohexylene and phenylene rings tend to increase the minimum temperature and viscosity of the nematic phase of the liquid crystal composition.
- the viscosity can be reduced when the composition does not contain a liquid crystal compound having a total power of cyclohexylene ring and phenylene ring as the liquid crystal compound.
- the terminal ring does not contain a liquid crystalline compound having an electron-withdrawing group such as a halogen in the 4-position carbon based on the carbon having a bonding group
- the dielectric constant is particularly large. Anisotropy can be increased negatively and viscosity can be decreased.
- the content ratio of the first component and the second component of the liquid crystal composition (1) according to the present invention is not particularly limited, but is based on the total weight of the liquid crystal compound in the liquid crystal composition (1).
- the content ratio of the first component is preferably 5 to 40% by weight and the content ratio of the second component is preferably 60 to 95% by weight,
- the content ratio of the second component is more preferably 70 to 90% by weight.
- the temperature range of the nematic phase of the liquid crystal composition is widened, the dielectric anisotropy is set to an appropriate range, and the specific resistance is increased. Can increase the power S.
- the lower limit temperature of the nematic phase of the liquid crystal composition can be lowered.
- the content ratio of the first component and the second component is in the above range, the content ratio of each compound of the first component is 10% by weight or less per compound, the content ratio of each compound of the second component is 15% per compound.
- the minimum temperature of the nematic phase of the liquid crystal composition can be easily adjusted to _20 ° C or less.
- liquid crystal composition (2) a combination of the third component in addition to the first component and the second component is also preferable (hereinafter also referred to as “liquid crystal composition (2)”).
- liquid crystal composition (2) a combination of the third component in addition to the first component and the second component is also preferable.
- the content ratios of the first component, the second component, and the third component of the liquid crystal composition (2) according to the present invention are not particularly limited, but the first component is based on the total weight of the liquid crystal compound. It is preferable that the content of the component is in the range of 5 to 30% by weight, the content of the second component is in the range of 50 to 90% by weight, and the content of the third component is in the range of 5 to 40% by weight. More preferably, the content of one component is in the range of 10 to 25% by weight, the content of the second component is in the range of 60 to 80% by weight, and the content of the third component is in the range of 10 to 30% by weight.
- the minimum temperature of the nematic phase of the liquid crystal composition can be lowered.
- the content ratio of the first component, the second component, and the third component is in the above range, the content ratio of each compound of the first component is 10% by weight or less per one compound, and the content ratio of each compound of the second component is 1
- the minimum temperature of the nematic phase of the liquid crystal composition is set to ⁇ 20 ° C. Easy to adjust below.
- the liquid crystal composition (2) when the content ratios of the first component, the second component, and the third component are in the above range, and the liquid crystal compound contains no components other than the above components, the liquid crystal composition
- the temperature range of the nematic phase of the composition can be expanded, the optical anisotropy can be set within an appropriate range, the dielectric anisotropy can be set within an appropriate range, the viscosity can be further reduced, and the specific resistance can be further increased.
- liquid crystal composition according to the present invention in addition to the first component, the second component, and the liquid crystal compound as the third component added as necessary, for example, for the purpose of further adjusting the characteristics of the liquid crystal composition.
- other liquid crystal compounds are added and used.
- a liquid crystal compound other than the liquid crystal compound as the first component, the second component, and the third component added as necessary is added. Sometimes it is used without.
- the dielectric anisotropy of the liquid crystal composition is negatively increased, resulting in an optical difference. Increase the directionality and lower the minimum temperature.
- liquid crystal composition of the present invention when the liquid crystalline compound is composed of only the first component, the second component, and the third component, the dielectric anisotropy of the liquid crystal composition is negatively increased. However, the viscosity is reduced and the minimum temperature is lowered.
- the liquid crystal composition according to the present invention may further contain additives such as an optically active compound, a dye, an antifoaming agent, an ultraviolet absorber, and an antioxidant.
- additives such as an optically active compound, a dye, an antifoaming agent, an ultraviolet absorber, and an antioxidant.
- the liquid crystal composition can be applied to a liquid crystal display device that displays in a GH (Guest host) mode.
- GH Guest host
- an antifoaming agent is added to the liquid crystal composition according to the present invention, foaming during transportation of the liquid crystal composition or production of a liquid crystal display element from the liquid crystal composition can be suppressed.
- the liquid crystal composition according to the present invention When an ultraviolet absorber or an antioxidant is added to the liquid crystal composition according to the present invention, it is possible to prevent deterioration of the liquid crystal composition or a liquid crystal display device containing the liquid crystal composition. It becomes.
- the antioxidant can suppress a decrease in specific resistance when the liquid crystal composition is heated.
- Examples of the ultraviolet absorber include benzophenone ultraviolet absorbers, benzoate ultraviolet absorbers, and triazole ultraviolet absorbers.
- a specific example of the benzophenone-based ultraviolet absorber is 2-hydroxy-4 octoxybenzophenone.
- a specific example of the benzoate-based UV absorber is 2,4 tert-butyl phenenoyl 3,5-di-tert butyl -4-hydroxybenzoate.
- triazole-based UV absorbers 2- (2 hydroxy-5 methylphenyl) benzotriazole, 2- [2 hydroxy-1- (3-, 4, 5, 6 tetrahydroxyphthalimidomethyl) 5 methylphenyl] benzo Triazole, and 2- (3-tert-butyl-1,2-hydroxy-1,5-methylphenyl) -15-clobenzobenzotriazole.
- antioxidants examples include phenol-based antioxidants and organic sulfur-based antioxidants.
- phenolic antioxidants include 3,5-di-tert_butyl_4-hydroxytoluene, 2, 6_di-tert-butyl_4_propylphenol, 2, 6_di-tert- Butinole _4 _Pentylphenol, 2, 6 _Di tert-Butyl _4_Heptylphenol, 2, 2 '-Methylenebis (6 _tert-Butyl-4 _Methylphenol), 4, 4' -Butylidenebis (6 _tert _Butyl) _ 3 _Methylphenol), 2, 6 _Di-tert-butyl _4 _ (2-Otadecyloxycarbonyl) ethylphenol, and pentaerythritol tetrakis [3-(3,5 _di-tert-butyl _4-hydroxy Phenyl) propionate].
- organic sulfur antioxidant examples include dilauryl-3,3'-thiopropionate, dimyristinole-1,3'-thiopropionate, distearyl-1,3'-thiopropio , Pentaerythritol tetrakis (3 lauryl thiopropionate), and 2 mercap Tobenzimidazole.
- the above-mentioned additives typified by ultraviolet absorbers, antioxidants and the like can be used in amounts that do not impair the object of the present invention and can achieve the object of adding the additive.
- the addition ratio is usually in the range of 100 ppm to 1000000 ppm, preferably in the range of 100 to 10 ppm, based on the total weight of the liquid crystal compound.
- the amount is preferably in the range of 1000 to 10000 ppm.
- the ratio of addition is determined based on the total weight of the liquid crystal compound (based on this amount, usually in the range of 10 ppm to 500 ppm, preferably in the range of 30 to 300 ppm). More preferably, the amount is in the range of 40 to 200 ppm.
- the liquid crystal composition according to the present invention includes a synthesis raw material, a by-product, a reaction solvent, a synthesis catalyst, and the like mixed in a synthesis process of each compound constituting the liquid crystal composition, a preparation process of the liquid crystal composition, and the like. Sometimes it contains impurities.
- each component compound when each component compound is a liquid, the respective compounds are mixed and shaken. It can be prepared by mixing and making each other liquid by heating and then shaking.
- the liquid crystal composition according to the present invention can be prepared by other known methods.
- the liquid crystal composition according to the present invention usually has an optical anisotropy in the range of 0.08-0.20.
- the optical anisotropy can be in the range of 0.10 to 0.15 by appropriately adjusting the composition and the like.
- the temperature range of the nematic phase of the liquid crystal composition can be widened to reduce the viscosity.
- the dielectric anisotropy is usually in the range of _6.5 to 12.0, preferably in the range of -5.0 to 12.5. It is possible to obtain a liquid crystal composition having a dielectric anisotropy, more preferably a dielectric anisotropy in the range of ⁇ 4.5 to 3.0.
- the dielectric anisotropy is in the above numerical range, it can be suitably used as a liquid crystal display device displayed in IPS mode and VA mode.
- the liquid crystal composition according to the present invention usually has both the optical anisotropy in the numerical range and the dielectric anisotropy in the numerical range.
- the optical anisotropy ( ⁇ ) of the liquid crystal composition and the cell gap of the liquid crystal display element (d) is designed to be a constant value.
- this value (A n 'd) is preferably in the range of 0.30 to 0.35 zm.
- the cell gap (d) is usually 3 to 6 ⁇ m
- the optical anisotropy of the liquid crystal composition is, for example, in the range of 0.05 to 0.11 in order to maximize the contrast ratio. It is preferable.
- Cell gap of 4 / im or more in VA mode (In this case, it may not be preferable for the response speed of the liquid crystal display device to slow down.
- a liquid crystal display element with a cell gap (d) smaller than 4 / im is used, and the optical anisotropy of the liquid crystal composition used for these is higher than the normal optical anisotropy range. For example, it is in the range of 0.10 to 0.15, and this also applies to IPS mode.
- the liquid crystal composition according to the present invention can be used for a liquid crystal display element.
- the liquid crystal display device according to the present invention may be driven by either AM mode or passive matrix (PM) mode, and may be PC mode, TN mode, STN mode, OCB mode, VA mode, IPS mode, etc. It may be displayed in the operation mode of deviation.
- the liquid crystal display elements driven by these AM and PM systems can be applied to any liquid crystal display such as a reflective type, a transmissive type and a transflective type.
- the liquid crystal composition according to the present invention includes a DS (dynamic scattering) mode element using a liquid crystal composition to which a conductive agent is added, and an N CAP (nematic curvilinear) manufactured by microencapsulating a liquid crystal composition. It can also be used for aligned phase (PD) devices and PD (polymer dispersed) devices in which three-dimensional network molecules are formed in a liquid crystal composition, for example, PN (polymer network) devices.
- PD aligned phase
- PN polymer network
- the liquid crystal composition according to the present invention has the characteristics as described above, it has a negative dielectric constant. It can be suitably used for AM mode liquid crystal display elements that display in a display mode that uses directionality, for example, VA mode, IPS mode, etc., and is particularly suitable for AM type liquid crystal display elements that display in VA mode. I can.
- the direction of the electric field is perpendicular to the liquid crystal layer when compared with a liquid crystal display element that displays in TN mode, VA mode, or the like.
- a liquid crystal display element that displays in IPS mode or the like the direction of the electric field is parallel to the liquid crystal layer.
- the structure of the liquid crystal display element that displays in VA mode was reported in K. Ohmuro, S. Kataoka, T. Sasaki and Y. Koike, SID '97 Digest of Technical Papers, 28, 845 (1997).
- the structure of the liquid crystal display device that displays in the IPS mode is reported in the pamphlet of International Publication No. 91/10936 (family: US557686 7).
- liquid crystal composition obtained by the present invention will be described in detail with reference to examples.
- the present invention is not limited by the following examples.
- the liquid crystalline compounds used in the examples are represented by symbols based on the definitions in Table 1 below.
- Table 1 the configuration of 1,4-cyclohexylene is a trans configuration.
- the ratio (percentage) of each compound is a weight percentage (% by weight) based on the total weight of the liquid crystal compound unless otherwise specified.
- each component is accurately weighed and formulated.
- the characteristic values of the liquid crystal composition obtained at the end of each example are shown.
- the characteristic values were measured according to the following method. Many of these measurement methods are the methods described in the Standard of Electric Industries Association of Japan (EIAJ'E D-2521A) or a modified method thereof.
- the sample was placed on a hot plate of a melting point measurement apparatus equipped with a polarizing microscope and heated at a rate of 1 ° CZ.
- the temperature at which a part of the sample changed from a nematic phase to an isotropic liquid was measured.
- the upper limit temperature of the nematic phase may be abbreviated as “upper limit temperature”.
- Samples with nematic phase are 0 ° C, _10 ° C, _20. C, _30 ° C, and -40. After storage in a C freezer for 10 days, the liquid crystal phase was observed. For example, if the sample is -20 ° C, Tc was described as ⁇ _20 ° C when it remained in the matic phase and changed to crystalline or smectic phase at _30 ° C.
- the lower limit temperature of the nematic phase may be abbreviated as “lower limit temperature”.
- Measurement was performed using an Abbe refractometer with a polarizing plate attached to the eyepiece using light having a wavelength of 589 nm.
- the sample was dropped on the main prism.
- the refractive index (n II) when the polarization direction was parallel to the rubbing direction and the refractive index (n ⁇ ) when the polarization direction was perpendicular to the rubbing direction were measured.
- the value of optical anisotropy ( ⁇ ) is
- a polyimide alignment film was prepared on a glass substrate in the same manner. After the alignment film of the obtained glass substrate was rubbed, a TN device in which the distance between the two glass substrates was 9 zm and the twist angle was 80 degrees was assembled.
- a sample (liquid crystal composition) was put into the obtained VA device, 0.5 volt (lkHz, sine wave) was applied, and the dielectric constant ( ⁇ II) in the major axis direction of the liquid crystal molecules was measured. .
- VHR Voltage holding ratio
- a sample was placed in a cell having a polyimide alignment film, and the distance between two glass substrates (cell gap) was 6 am, to produce a TN device.
- the TN device was charged by applying a pulse voltage (5 volts, 60 microseconds).
- the waveform of the voltage applied to the TN device was observed with a cathode ray oscilloscope, and the area between the voltage curve and the horizontal axis in the unit period (16.7 milliseconds) was determined.
- the area was obtained in the same way from the waveform of the voltage applied after removing the TN device.
- the value of voltage holding ratio (%) is
- VHR-1 The voltage holding ratio obtained in this manner was indicated as "VHR-1”.
- this TN element was heated at 100 ° C for 250 hours. After returning the TN device to 25 ° C, the voltage holding ratio was measured by the same method as described above. The voltage holding ratio obtained after this heating test is shown as “VHR-2”. This heating test is an accelerated test and corresponds to the long-term durability test of TN devices.
- Liquid crystal cells were injected with 1.OmL of liquid crystal and a DC voltage of 10V was applied.
- the direct current of the cell was measured 10 seconds after voltage application, and the specific resistance was calculated.
- the measuring device used was a GC-14B gas chromatograph manufactured by Shimadzu Corporation or an equivalent measuring instrument.
- the column was a single-strength ram CBP1-M25-025 (length: 25 m, inner diameter: 0.22 mm, film thickness: 0.25 ⁇ m; stationary liquid phase: dimethylpolysiloxane; nonpolar) manufactured by Shimadzu Corporation.
- Helium was used as the carrier gas, and the flow rate was adjusted to 2 mlZ.
- the column is held at 200 ° C for 2 minutes and then heated to 280 ° C at a rate of 5 ° C / min. It was.
- the temperature of the sample vaporization chamber was set to 280 ° C, and the temperature of the detector (FID) was set to 300 ° C.
- C-R5A Chromatopac manufactured by Shimadzu Corporation or an equivalent product was used as a recorder.
- the obtained gas chromatogram shows the peak retention time and peak area values corresponding to the component compounds.
- a dilution solvent for the sample for example, black mouth form or hexane may be used.
- a column Agilent Technologies Inc.'s first strength ram DB-1 (length 30 m, inner diameter 0 ⁇ 32 mm ⁇ thickness 0 ⁇ 25 ⁇ m), Agilent Technologies Inc.
- HP-1 ( Rtx— 1 (length 30 m, inner diameter 0 ⁇ 32 mm ⁇ thickness 0 ⁇ 25 ⁇ m), SGE International Pty, length 30 mm, inner diameter 0 ⁇ 32 mm, film thickness 0 ⁇ 25 ⁇ m)
- BP td BP-1 (length 30 m, inner diameter 0 ⁇ 32 mm, film thickness 0 ⁇ 25 ⁇ m)
- Shimadzu capillary column 8? 1-? ⁇ 50-025 length 50111, inner diameter 0.25mm, monthly J? 0.25 ⁇ m
- the area ratio of the peaks in the gas chromatogram corresponds to the ratio of the component compounds.
- the weight% of the component compounds in the sample is not completely the same as the area% of each peak in the sample.
- the correction factor is substantially 1. Therefore, the weight% of the component compound in the sample substantially corresponds to the area% of each peak in the sample. This is because there is no significant difference in the correction coefficients of the liquid crystal compounds of the respective components.
- an internal standard method using the gas chromatogram is used.
- compositions containing the second and third components of the present invention were prepared and described above. Each characteristic value was measured by the method.
- Example 6 of Patent Document 5 Japanese Patent Laid-Open No. 9183974.
- the physical property values are those described in Patent Document 5.
- the composition of Example 6 contains a first component of the present invention and a compound component similar to the second component.
- the dielectric anisotropy ⁇ of the above composition is _2.6, which is not a large negative value.
- liquid crystal composition of the present invention can increase ⁇ negatively.
- Comparative Example 2 is a composition similar to Example 6 of Patent Document 5 (Japanese Patent Laid-Open No. 9183974) of the above reference data.
- the composition of the present invention has a temperature range of the nematic phase in which the lower limit temperature is lower than that of the composition of Comparative Example 2, and has a more negative ⁇ .
- the minimum temperature Tc of the nematic phase is ⁇ _20 ° C.
- compositions were prepared, and each characteristic value was measured by the method described above.
- the composition of Example 1 is a composition obtained by replacing the third component (3-2) of Comparative Example 1 with the first component (11). Compared with Comparative Example 1, the composition of Example 1 contains the first component of the present invention, so that the maximum temperature is high and the temperature range of the nematic phase is wide. In addition, ⁇ of the above composition is larger than that of Comparative Example 1, and can be easily applied to a liquid crystal display device having a smaller cell gap (d) for high-speed response. Furthermore, the above composition has a large voltage holding ratio.
- compositions were prepared and each characteristic value was measured by the method described above.
- Example 2 Compared with Comparative Example 1, the composition of Example 2 has a wide nematic phase temperature range where the maximum temperature is high and the minimum temperature is ⁇ _20 ° C. Also, ⁇ is negatively large and ⁇ is large. In addition, the voltage holding ratio is large.
- compositions were prepared and each characteristic value was measured by the method described above.
- Example 3 Compared with Comparative Example 1, the composition of Example 3 had a wide nematic phase temperature range where the maximum temperature was high and the minimum temperature was ⁇ 20 ° C. Also, ⁇ could be increased . And it has a large voltage holding ratio.
- Example 4 Compared to Comparative Example 1, the composition of Example 4 has a wide nematic phase temperature range where the maximum temperature is high and the minimum temperature is ⁇ _20 ° C. Also, ⁇ is large and the voltage holding ratio is large.
- Example 5
- compositions were prepared, and each characteristic value was measured by the method described above.
- Example 5 The following compositions were prepared and each characteristic value was measured by the method described above.
- the first component of Example 5 was replaced with a component of a similar compound having no fluorine.
- the composition of Example 5 has a negative ⁇ that is negative. Also, the minimum temperature of nematic phase is low.
- NI 82.7 ° C; Tc ⁇ 0 ° C; ⁇ -3.0;
- compositions were prepared and each characteristic value was measured by the method described above.
- Example 4 Compared to Comparative Example 1, the composition of Example 4 has a wide nematic phase temperature range in which the maximum temperature is high and the minimum temperature is ⁇ ° C. Also, ⁇ is large.
- compositions were prepared and each characteristic value was measured by the method described above.
- Example 8 Compared with Comparative Example 1, the composition of Example 7 has a wide nematic phase temperature range where the maximum temperature is high and the minimum temperature is ⁇ _20 ° C. Also, ⁇ is negative and ⁇ is large.
- Example 8
- compositions were prepared and each characteristic value was measured by the method described above.
- VHR-1 99.2%.
- Example 8 Compared to Comparative Example 1, the composition of Example 8 has a wide nematic phase temperature range where the maximum temperature is high and the minimum temperature is ⁇ 20 ° C. ⁇ is negatively large ⁇ is large. In addition, the voltage holding ratio is large.
- Example 9 Compared with Comparative Example 1, the composition of Example 9 has a higher upper limit temperature of 11111111 and a lower limit temperature of ⁇
- the temperature range of the nematic phase is as low as ° C.
- 1 1 1 1 viscosity 1 1 1 1 degree is small ⁇ is large,
- compositions were prepared, and each characteristic value was measured by the method described above.
- Example 11 Compared to Comparative Example 1, the composition of Example 10 has a higher maximum temperature and a lower temperature limit of ⁇ Wide temperature range of nematic phase as low as ° C. In addition, ⁇ is large and the voltage holding ratio is large.
- Example 11 Compared to Comparative Example 1, the composition of Example 10 has a higher maximum temperature and a lower temperature limit of ⁇ Wide temperature range of nematic phase as low as ° C. In addition, ⁇ is large and the voltage holding ratio is large. Example 11
- compositions were prepared, and each characteristic value was measured by the method described above.
- Example 12 Compared to Comparative Example 1, the composition of Example 11 has a higher maximum temperature and a large ⁇ .
- compositions were prepared, and each characteristic value was measured by the method described above.
- Example 12 Compared to Comparative Example 1, the composition of Example 12 has a wide nematic phase temperature range in which the maximum temperature is high and the minimum temperature is ⁇ _20 ° C. Also, the viscosity is small and ⁇ is large.
- Example 1 of JP 2006-131906 A examples of the composition described in Example 1 of JP 2006-131906 A are given below.
- the physical property values are those described in JP-A-2006-131906.
- compositions containing the first component, the second component, and the third component of the present invention were prepared, and each characteristic value was measured by the method described above.
- This Reference Example 1 is based on the above reference data.
- compositions were prepared and each characteristic value was measured by the method described above.
- Example 14 Compared to Comparative Example 1, the composition of Example 13 has a wide temperature range of the nematic phase where the maximum temperature is high and the minimum temperature is ⁇ ° C. Also, the viscosity is small and ⁇ is large.
- Example 14 Compared to Comparative Example 1, the composition of Example 13 has a wide temperature range of the nematic phase where the maximum temperature is high and the minimum temperature is ⁇ ° C. Also, the viscosity is small and ⁇ is large. Example 14
- compositions were prepared and each characteristic value was measured by the method described above. 11
- Example 15 Compared to Comparative Example 1, the composition of Example 15 has a wide nematic phase temperature range in which the maximum temperature is high and the minimum temperature is ⁇ ° C. Also, the viscosity is small and ⁇ is large.
- Example 16 The following compositions were prepared and each characteristic value was measured by the method described above.
- Example 16 Compared to Comparative Example 4, the composition of Example 16 has the same maximum temperature, minimum temperature, ⁇ and ⁇ , but a low viscosity.
- compositions were prepared and each characteristic value was measured by the method described above.
- Example 17 is a combination of the first component, the second component compound (2-1-2) and the compound (2-2-3), and the third component compound (3-1). .
- the composition of Example 17 has a relatively large ⁇ but a small viscosity.
- Example 18
- compositions were prepared, and each characteristic value was measured by the method described above.
- Example 18 Compared to Comparative Example 1, the composition of Example 18 has a wide nematic phase temperature range in which the maximum temperature is high and the minimum temperature is ⁇ _40 ° C. Also, the viscosity is small and ⁇ is large.
- compositions were prepared and each characteristic value was measured by the method described above.
- Example 19 Compared with Comparative Example 1, the composition of Example 19 has a higher maximum temperature and a lower limit temperature of ⁇ _20.
- the temperature range of the nematic phase is as low as ° C. Also, the viscosity is small and ⁇ is large.
- Example 21 Compared to Comparative Example 1, the composition of Example 21 has a wide nematic phase temperature range in which the upper limit temperature is higher and the lower limit temperature is ⁇ _30 ° C. Also, the viscosity is small and ⁇ is large.
- compositions were prepared and each characteristic value was measured by the method described above.
- Example 22 Compared to Comparative Example 4, the composition of Example 22 has the same ⁇ and ⁇ , but a lower viscosity.
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Abstract
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EP06843436A EP1978073B1 (en) | 2006-01-06 | 2006-12-27 | Liquid crystal composition and liquid crystal display element |
US12/160,208 US7767110B2 (en) | 2006-01-06 | 2006-12-27 | Liquid crystal composition and liquid crystal display device |
KR1020087019201A KR101308768B1 (ko) | 2006-01-06 | 2006-12-27 | 액정 조성물 및 액정 표시 소자 |
JP2007552959A JP5119928B2 (ja) | 2006-01-06 | 2006-12-27 | 液晶組成物および液晶表示素子 |
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JP2009084362A (ja) * | 2007-09-28 | 2009-04-23 | Dic Corp | ネマチック液晶組成物 |
US7597944B2 (en) * | 2007-04-04 | 2009-10-06 | Chisso Corporation | Liquid crystal composition and liquid crystal display device |
WO2011024665A1 (ja) * | 2009-08-25 | 2011-03-03 | チッソ株式会社 | 液晶組成物および液晶表示素子 |
WO2012137810A1 (ja) | 2011-04-06 | 2012-10-11 | Dic株式会社 | ネマチック液晶組成物及びこれを用いた液晶表示素子 |
JP5170603B1 (ja) * | 2012-04-26 | 2013-03-27 | Dic株式会社 | ネマチック液晶組成物及びこれを用いた液晶表示素子 |
WO2013047359A1 (ja) | 2011-09-27 | 2013-04-04 | Dic株式会社 | ネマチック液晶組成物及びこれを用いた液晶表示素子 |
WO2013094596A1 (ja) | 2011-12-21 | 2013-06-27 | Dic株式会社 | ネマチック液晶組成物及びこれを用いた液晶表示素子 |
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Also Published As
Publication number | Publication date |
---|---|
US20090090892A1 (en) | 2009-04-09 |
CN101351432B (zh) | 2011-08-31 |
TWI400320B (zh) | 2013-07-01 |
US7767110B2 (en) | 2010-08-03 |
CN101356251A (zh) | 2009-01-28 |
EP1978073A4 (en) | 2010-05-12 |
JP5119928B2 (ja) | 2013-01-16 |
KR20080084851A (ko) | 2008-09-19 |
CN101356251B (zh) | 2013-01-09 |
JPWO2007077872A1 (ja) | 2009-06-11 |
CN101351432A (zh) | 2009-01-21 |
TW200732458A (en) | 2007-09-01 |
KR101308768B1 (ko) | 2013-09-17 |
EP1978073A1 (en) | 2008-10-08 |
EP1978073B1 (en) | 2012-07-11 |
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