WO2014148197A1 - 重合性化合物含有液晶組成物及びこれを使用した液晶表示素子 - Google Patents
重合性化合物含有液晶組成物及びこれを使用した液晶表示素子 Download PDFInfo
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- WO2014148197A1 WO2014148197A1 PCT/JP2014/054136 JP2014054136W WO2014148197A1 WO 2014148197 A1 WO2014148197 A1 WO 2014148197A1 JP 2014054136 W JP2014054136 W JP 2014054136W WO 2014148197 A1 WO2014148197 A1 WO 2014148197A1
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- NLZUEZXRPGMBCV-UHFFFAOYSA-N CC(C)(C)c(cc(C)cc1C(C)(C)C)c1O Chemical compound CC(C)(C)c(cc(C)cc1C(C)(C)C)c1O NLZUEZXRPGMBCV-UHFFFAOYSA-N 0.000 description 1
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- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
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- G02F1/1337—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers
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- C09K19/3001—Cyclohexane rings
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Definitions
- the present invention relates to a polymerizable compound-containing liquid crystal composition and a liquid crystal display device using the same.
- the PSA (Polymer Sustained Alignment) type liquid crystal display element has a polymer structure formed in the cell to control the pretilt angle of the liquid crystal molecules, and is the next generation liquid crystal display element due to its features such as high-speed response and high contrast. Has been put to practical use.
- a PSA-type liquid crystal display device is a liquid crystal display device using a polymerizable compound-containing liquid crystal composition comprising a liquid crystal compound and a polymerizable compound, and polymerizes the polymerizable compound in a state where liquid crystal molecules are aligned by voltage application, thereby producing a liquid crystal It is manufactured by fixing the molecular orientation.
- the polymerization reaction rate of the polymerizable compound is very important for productivity. It is also very important to adjust the pretilt angle that affects the response speed and contrast of the PSA type liquid crystal display element and the residual amount of the polymerizable compound that affects the reliability such as display unevenness and image sticking.
- the polymerization reaction rate of the polymerizable compound depends on the wavelength and irradiation intensity of the UV irradiation lamp, development of a polymerizable compound-containing liquid crystal composition containing the polymerizable compound adapted to the specifications of the UV irradiation lamp is required. However, sufficient response was difficult.
- Patent Document 1 a technique for shortening the polymerization reaction rate by containing a liquid crystal compound having a terphenyl ring has been introduced (Patent Document 1), but when a liquid crystal compound having a terphenyl ring is used, The reliability of display unevenness and burn-in due to a decrease in VHR may be affected.
- the problem to be solved by the present invention is that the viscosity ( ⁇ ) is sufficiently small, the rotational viscosity ( ⁇ 1) is sufficiently small, the reaction rate of the polymerizable compound is sufficiently high, and the residual of the polymerizable compound after UV irradiation is
- the present invention provides a liquid crystal composition containing a polymerizable compound that is sufficiently suppressed, and that has a sufficiently fast response speed, enables 3D display, and achieves uniform and stable alignment control with less energy cost.
- An object of the present invention is to provide a PSA type liquid crystal display element.
- a polymerizable compound-containing liquid crystal composition containing one or more compounds represented by the formula, a liquid crystal display device using the same, a general formula (Na), a general formula (Nb), or a general formula ( A compound represented by Nc) is provided.
- the viscosity ( ⁇ ) of the polymerizable compound-containing liquid crystal composition of the present invention is sufficiently low, a liquid crystal display device using the polymerizable compound has a sufficiently fast response speed and can display 3D, and the polymerizable compound contains Since there is no residue or it is sufficiently suppressed, display unevenness or image sticking does not occur or is extremely suppressed. Further, since the polymerization reaction rate of the polymerizable compound is sufficiently high, the energy cost for production can be reduced, the production efficiency can be improved, and uniform and stable alignment control can be obtained, which is very useful.
- the polymerizable compound-containing liquid crystal composition of the present invention has a general formula (M) as a first component.
- X 201 and X 202 each independently represent a hydrogen atom, a methyl group, or a —CF 3 group.
- X 201 and X 202 are each preferably a diacrylate derivative that is a hydrogen atom, and a dimethacrylate derivative that is both a methyl group, and a compound in which one is a hydrogen atom and the other is a methyl group.
- a preferred compound can be used depending on the application, but in the PSA display element, the polymerizable compound represented by the general formula (M) preferably has at least one methacrylate derivative, and preferably has two.
- Sp 201 and Sp 202 each independently represent a single bond, an alkylene group having 1 to 8 carbon atoms, or —O— (CH 2 ) s — (wherein s represents an integer of 2 to 7, Represents a bond to a ring).
- at least one of Sp 201 and Sp 202 is preferably a single bond, either a single bond compound or one of which is a single bond and the other is an alkylene having 1 to 8 carbon atoms.
- Ring M 201 , Ring M 202 and Ring M 203 are each independently a trans-1,4-cyclohexylene group (one or two or more non-adjacent —CH 2 — in the group is —O— or May be substituted by —S—), 1,4-phenylene group (one or two or more non-adjacent —CH ⁇ in the group may be substituted by —N ⁇ ), 1,4-cyclohexenylene group, 1,4-bicyclo [2.2.2] octylene group, piperidine-1,4-diyl group, naphthalene-2,6-diyl group, decahydronaphthalene-2,6- Represents a diyl group or a 1,2,3,4-tetrahydronaphthalene-2,6-diyl group, and each hydrogen atom in the group is independently a fluorine atom, a —CF 3 group, or a carbon atom number of 1 to 10.
- Z 201 and Z 202 each independently represent —OCH 2 —, —CH 2 O—, —COO—, —OCO—, —CF 2 O—, —OCF 2 —, —CH 2 CH 2 —, — CF 2 CF 2 —, —CH ⁇ CH—COO—, —CH ⁇ CH—OCO—, —COO—CH ⁇ CH—, —OCO—CH ⁇ CH—, —COO—CH 2 CH 2 —, —OCO— CH 2 CH 2 —, —CH 2 CH 2 —COO—, —CH 2 CH 2 —OCO—, —COO—CH 2 —, —OCO—CH 2 —, —CH 2 —COO—, —CH 2 —OCO—, —CY 1 ⁇ CY 2 — (wherein Y 1 and Y 2 each independently represents a fluorine atom or a hydrogen atom), —C ⁇ C— or a single bond, —COO—
- n 201 represents 0, 1 or 2, with 0 or 1 being preferred. However, when there are a plurality of rings M 202 and Z 202 , they may be different or the same.
- the polymerizable compound-containing liquid crystal composition of the present invention contains at least one polymerizable compound represented by formula (M), preferably 1 to 5 types, and preferably 1 to 3 types. More preferably.
- the content of the polymerizable compound represented by the general formula (M) is too large, the energy required for the polymerization increases, the amount of the polymerizable compound remaining without being polymerized increases, and the display is poor. Therefore, the content is preferably 0.01 to 2.00% by mass, more preferably 0.05 to 1.00% by mass, and 0.10 to 0.50% by mass. It is particularly preferred that
- the ring structure between Sp 201 and Sp 202 is preferably a formula (XXa-1) to a formula (XXa-5),
- the formula (XXa-1) to the formula (XXa-3) are more preferable, and the formula (XXa-1) or the formula (XXa-2) is particularly preferable.
- both ends of the equation shall be connected to Sp 201 or Sp 202 .
- the polymerizable compound represented by the general formula (M) containing these skeletons is suitable for a PSA mode liquid crystal display element because of its alignment regulating force after polymerization, and a good alignment state can be obtained, thereby suppressing display unevenness. There is an effect that does not occur at all.
- the polymerizable monomer is preferably a compound represented by the formula (XX-1) to the general formula (XX-10), more preferably the formula (XX-1) to the formula (XX-4).
- Sp xx represents an alkylene group having 1 to 8 carbon atoms or —O— (CH 2 ) s — (wherein s represents an integer of 2 to 7, and an oxygen atom is bonded to the ring. ).
- the hydrogen atom in the phenyl group in the formula may be further substituted by —F, —Cl, —CF 3 , —CH 3 , or any one of formulas (R-1) to (R-15). .
- n 201 is 1, for example, a polymerizable compound such as the formula (M31) to the formula (M48) is preferable.
- the hydrogen atom in the phenyl group and naphthalene group in the formula is further substituted with —F, —Cl, —CF 3 , —CH 3 , or any one of formulas (R-1) to (R-15). May be.
- the polymerizable compound represented by the general formula (M) containing these skeletons is suitable for a PSA mode liquid crystal display element because of its alignment regulating force after polymerization, and a good alignment state can be obtained, thereby suppressing display unevenness. There is an effect that does not occur at all.
- n 201 is 1 and there are a plurality of formulas (R-1) or (R-2), for example, polymerizable compounds such as formulas (M301) to (M316) preferable.
- the hydrogen atom in the phenyl group and naphthalene group in the formula may be further substituted with —F, —Cl, —CF 3 , —CH 3 .
- the polymerizable compound represented by the general formula (M) containing these skeletons is suitable for a PSA mode liquid crystal display element because of its alignment regulating force after polymerization, and a good alignment state can be obtained, thereby suppressing display unevenness. There is an effect that does not occur at all.
- the polymerizable compound-containing liquid crystal composition of the present invention has, as a second component, a general formula (Na), a general formula (Nb) or a general formula (Nc) having a naphthalene skeleton.
- R 21 or R 22 is an alkyl group having 1 to 10 carbon atoms, an alkoxyl group having 1 to 10 carbon atoms, or 2 carbon atoms. from represents 10 alkenyl group or alkenyloxy group having 2 to 10 carbon atoms of one or two or more hydrogen atoms present in the group may be substituted by fluorine atoms but, R 21 is A linear alkyl group having 1 to 5 carbon atoms or an alkenyl group having 2 to 5 carbon atoms is more preferable, an alkyl group having 1 to 5 carbon atoms is particularly preferable, and R 22 is a linear alkyl group.
- an alkyl group having 1 to 5 carbon atoms it is more preferably an alkyl group having 1 to 5 carbon atoms, an alkoxyl group having 1 to 5 carbon atoms, or an alkenyl group having 2 to 5 carbon atoms, and particularly preferably an alkoxy group having 1 to 5 carbon atoms.
- Y 21 to Y 23 each independently represents a hydrogen atom, a methyl group, a —CF 3 group, a fluorine atom or a chlorine atom, and more preferably a hydrogen atom or a fluorine atom.
- Ring A and Ring B are each independently a trans-1,4-cyclohexylene group (one or non-adjacent two or more —CH 2 — in the group is substituted by —O— or —S—).
- 4-phenylene group one or two or more non-adjacent —CH ⁇ in the group may be substituted by —N ⁇
- octylene group piperidine-1,4-diyl group, naphthalene-2,6-diyl group, decahydronaphthalene-2,6-diyl group or 1,2,3 , Represents 4-tetrahydronaphthalene-2,6-diyl group
- Z 21 and Z 22 are each independently —OCH 2 —, —CH 2 O—, —COO—, —OCO—, —CF 2 O—, —OCF 2 —, —CH 2 CH 2 —, — CF 2 CF 2 —, —C ⁇ C— or a single bond is represented.
- n 0, 1 or 2, and is preferably 0 or 1. However, when there are a plurality of rings A and Z 21 , respectively, they may be different or the same.
- n 0, 1 or 2, and is preferably 0 or 1. However, when a plurality of rings B and Z 22 are present, they may be different or the same.
- M + n is preferably 1 or more, more preferably 1 or 2, and particularly preferably 2.
- the content is 0.5% by mass to 50% by mass, preferably 0.5% by mass to 10% by mass, and more preferably in the range of 0.5% by mass to 5% by mass.
- it is 0.5 to 4% by mass, particularly preferably 0.5 to 3% by mass, or 0.5 to 2% by mass.
- the compound selected from the group of compounds represented by formula (Na), formula (Nb) or formula (Nc) is represented by formula (N-001) to formula (N-109). It is preferable that it is a compound represented.
- R 23 and R 31 each independently represent the same meaning as R 21 , R 24 and R 32 each independently represent the same meaning as R 22 , Z 23 represents a single bond, —CH 2 —O —, —O—CH 2 —, —CF 2 —O—, —O—CF 2 —, —CH 2 CH 2 — or —CF 2 CF 2 —, wherein ring C is trans-1,4-cyclo Xylene group, 1,4-phenylene group, 2-fluoro-1,4-phenylene group, 3-fluoro-1,4-phenylene group, 3,5-difluoro-1,4-phenylene group, 2,3-difluoro -1,4-phenylene group, 1,4-cyclohexenylene group, 1,4-bicyclo [2.2.2] octylene group, piperidine-1,4-diyl group, naphthalene-2,6-diyl group, Decahydronaphthalene-2
- the hydrogen atom in the phenyl group and naphthalene group in the formula may be further substituted with any of —F, —Cl, —CF 3 , and —CH 3 .
- the compounds represented by the general formula (N-001) to the general formula (N-019) are preferable, A compound represented by general formula (N-001) to general formula (N-003) is more preferable, and a compound represented by general formula (N-001) is particularly preferable.
- the polymerizable compound-containing liquid crystal composition of the present invention further contains one or more compounds represented by the general formula (II), preferably 1 to 10 types, and preferably 1 to 5 types. It is more preferable to contain a seed, and the content thereof is preferably 10% by mass to 90% by mass, more preferably 10% by mass to 70% by mass, and particularly preferably 20% by mass to 50% by mass. preferable.
- R 1 and R 2 are each independently an alkyl group having 1 to 10 carbon atoms, an alkoxyl group having 1 to 10 carbon atoms, an alkenyl group having 2 to 10 carbon atoms, or 2 carbon atoms.
- 10 represents an alkenyloxy group
- one or non-adjacent two or more —CH 2 — present in R 1 and R 2 may be each independently substituted by —O— or —S—.
- one or two or more hydrogen atoms present in R 1 and R 2 may be each independently substituted with a fluorine atom or a chlorine atom.
- Ring A and ring B represent the same meaning as described above.
- P represents 0, 1 or 2, more preferably 0 or 1.
- Z is, -OCH 2 -, - CH 2 O -, - CF 2 O -, - OCF 2 -, - CH 2 CH 2 -, - CF 2 CF 2 - or represents a single bond, -CH 2 O- , —CF 2 O—, —CH 2 CH 2 — or a single bond is more preferable, and —CH 2 O— or a single bond is particularly preferable.
- the compound represented by the general formula (II) is preferably from the general formula (II-A1) to the general formula (II-A5) and from the general formula (II-B1) to the general formula (II-B5). More preferred are compounds of formula (II-A1) to general formula (II-A5), particularly preferred are compounds of general formula (II-A1) or general formula (II-A3).
- R 3 and R 4 each independently represents an alkyl group having 1 to 5 carbon atoms or an alkenyl group having 2 to 5 carbon atoms, and 1 or 2 present in R 3 and R 4 Two or more hydrogen atoms may be independently substituted with fluorine atoms.
- the polymerizable compound-containing liquid crystal composition of the present invention is selected from compounds represented by general formulas (III-A) to (III-J) as compounds having a dielectric anisotropy ( ⁇ ) of substantially zero.
- 1 type to 10 types are preferable, 1 type to 5 types are more preferable, 1 to 5 types are more preferable, and the content is 10 to 90% by mass, but 20% to 70% by mass More preferably, it is particularly preferably 30% by mass to 60% by mass.
- R 5 is an alkyl group having 1 to 5 carbon atoms or an alkenyl group having 2 to 5 carbon atoms
- R 6 is an alkyl group having 1 to 5 carbon atoms
- an alkoxyl group having 1 to 5 carbon atoms Represents an alkenyl group having 2 to 5 carbon atoms or an alkenyloxy group having 2 to 5 carbon atoms.
- R 5 is an alkenyl group having 2 to 5 carbon atoms
- R 6 is an alkyl group having 1 to 5 carbon atoms, or an alkyl group having 2 to 5 carbon atoms.
- An alkenyl group is preferred.
- the polymerizable compound-containing liquid crystal composition of the present invention preferably contains the compounds of the general formula (M) and the general formula (Na) at the same time, and simultaneously contains the compounds of the formula (XX-1) and the general formula (Na). It is preferable that the compound of the formula (XX-2) and the general formula (Na) are contained at the same time, and it is preferable that the compound of the formula (XX-3) and the general formula (Na) is contained at the same time.
- the polymerizable compound-containing liquid crystal composition of the present invention preferably contains the compounds of general formula (M), general formula (Na) and general formula (II-A1) at the same time.
- Na) and a compound of general formula (II-A3) are preferably contained at the same time, preferably a compound of general formula (M), general formula (Na) and general formula (II-B1) are contained simultaneously,
- the compound of the formula (M), the general formula (Na) and the general formula (II-B2) is contained at the same time, and the compound of the general formula (M), the general formula (Na) and the general formula (II-B3)
- the polymerizable compound-containing liquid crystal composition of the present invention preferably contains a compound of general formula (M), general formula (Na), general formula (II-A1) and general formula (III-A) at the same time. It is preferable to contain the compounds of the formula (M), the general formula (Na), the general formula (II-A3) and the general formula (III-A) at the same time, and the general formula (M), the general formula (Na), the general formula It is preferable to contain the compound of the formula (II-B1) and the general formula (III-A) at the same time.
- the general formula (M), the general formula (Na), the general formula (II-B2) and the general formula (III-A) It is preferable to contain the compounds of general formula (M), general formula (Na), general formula (II-B3) and general formula (III-A) at the same time.
- M), general formula (Na), general formula (II-B4), and Although it is preferable to contain the compound of general formula (III-A) at the same time, general formula (M), general formula (Na), general formula (II-A1), general formula (II-A3) and general formula (III It is particularly preferred to simultaneously contain the compound of -A).
- the polymerizable compound-containing liquid crystal composition of the present invention preferably contains a compound represented by general formula (M), general formula (Nb) and general formula (II-A1) at the same time.
- Nb) and a compound of general formula (II-A3) are preferably contained at the same time, preferably a compound of general formula (M), general formula (Nb) and general formula (II-B1) are contained simultaneously, It is preferable to simultaneously contain the compounds of the formula (M), the general formula (Nb) and the general formula (II-B2), and the compounds of the general formula (M), the general formula (Nb) and the general formula (II-B3) It is preferable to contain simultaneously, and it is preferable to contain the compound of general formula (M), general formula (Nb), and general formula (II-B4) simultaneously.
- the polymerizable compound-containing liquid crystal composition of the present invention preferably contains the compounds of general formula (M), general formula (Nb), general formula (II-A1) and general formula (III-A) at the same time. It is preferable to contain the compounds of the formula (M), the general formula (Nb), the general formula (II-A3) and the general formula (III-A) at the same time, and the general formula (M), the general formula (Nb), the general formula It is preferable to contain the compound of the formula (II-B1) and the general formula (III-A) at the same time.
- the general formula (M), the general formula (Nb), the general formula (II-B2) and the general formula (III-A) It is preferable to simultaneously contain the compounds of general formula (M), general formula (Nb), general formula (II-B3) and general formula (III-A).
- liquid crystal compound contained in the polymerizable compound-containing liquid crystal composition of the present invention it is preferable not to include a compound having an alkenyl group in order to suppress display defects such as image sticking and display unevenness, or not to generate at all.
- the side chain of all liquid crystal compounds is preferably an alkyl group or an alkoxyl group, and the cyclohexane ring or benzene ring in the liquid crystal compound may be substituted with a fluorine atom, but is substituted with a chlorine atom. It is not preferable.
- a liquid crystal display device using a liquid crystal composition including the general formula (M), the general formula (Na), the general formula (II), and the general formula (III-A) has a high-speed response and displays image sticking and display unevenness. Defects are greatly suppressed or do not occur at all.
- the compound represented by general formula (Nb) may be contained instead of general formula (Na), and the compound represented by general formula (Nc) is contained instead of general formula (Na).
- the general formula (Na) is most preferable.
- the polymerizable compound-containing liquid crystal composition of the present invention has a dielectric anisotropy ( ⁇ ) at 25 ° C. of ⁇ 2.0 to ⁇ 8.0, preferably ⁇ 2.0 to ⁇ 6.0, 2.0 to -5.0 is more preferable, and -2.5 to -4.0 is particularly preferable.
- the liquid crystal composition of the present invention has a refractive index anisotropy ( ⁇ n) at 20 ° C. of 0.08 to 0.14, more preferably 0.09 to 0.13, and 0.09 to 0.12. Particularly preferred. More specifically, it is preferably 0.10 to 0.13 when dealing with a thin cell gap, and preferably 0.08 to 0.10 when dealing with a thick cell gap.
- the liquid crystal composition of the present invention has a viscosity ( ⁇ ) at 20 ° C. of 10 to 30 mPa ⁇ s, more preferably 10 to 25 mPa ⁇ s, and particularly preferably 10 to 22 mPa ⁇ s.
- the liquid crystal composition of the present invention has a rotational viscosity ( ⁇ 1 ) at 20 ° C. of 60 to 130 mPa ⁇ s, more preferably 60 to 110 mPa ⁇ s, and particularly preferably 60 to 100 mPa ⁇ s. .
- the liquid crystal composition of the present invention has a nematic phase-isotropic liquid phase transition temperature (T ni ) of 60 ° C. to 120 ° C., more preferably 70 ° C. to 100 ° C., and particularly preferably 70 ° C. to 85 ° C.
- T ni nematic phase-isotropic liquid phase transition temperature
- the polymerization proceeds even in the absence of a polymerization initiator, but may contain a polymerization initiator in order to accelerate the polymerization.
- the polymerization initiator include benzoin ethers, benzophenones, acetophenones, benzyl ketals, acylphosphine oxides, and the like.
- the polymerizable compound-containing liquid crystal composition of the present invention may further contain a compound represented by the general formula (Q).
- R Q represents a linear or branched alkyl group having 1 to 22 carbon atoms, and one or two or more non-adjacent CH 2 groups in the group are —O—, —CH ⁇ CH—, —CO—, —OCO—, —COO—, —C ⁇ C—, —CF 2 O—, —OCF 2 — may be substituted.
- MQ represents a trans-1,4-cyclohexylene group, a 1,4-phenylene group or a single bond.
- the compound represented by the general formula (Q) is preferably a compound represented by the following general formula (Qa) to general formula (Qd).
- R Q1 is preferably a linear alkyl group or a branched alkyl group having 1 to 10 carbon atoms.
- R Q2 is preferably a linear alkyl group having 1 to 20 carbon atoms or a branched alkyl group.
- R Q3 is preferably a linear alkyl group having 1 to 8 carbon atoms, a branched alkyl group, a linear alkoxy group, or a branched alkoxy group.
- L Q is preferably a linear alkylene group having 1 to 8 carbon atoms or a branched alkylene group.
- the polymerizable compound-containing liquid crystal composition of the present invention contains one or more compounds represented by the general formula (Q), preferably 1 to 5 compounds, and preferably 1 to 3 compounds. More preferably, it is particularly preferable to contain one kind. Further, the content is preferably 0.001% by mass to 1% by mass, more preferably 0.001% by mass to 0.1% by mass, and particularly preferably 0.001% by mass to 0.05% by mass. .
- a stabilizer may be added to improve storage stability.
- examples of the stabilizer that can be used include hydroquinones, hydroquinone monoalkyl ethers, tert-butylcatechols, pyrogallols, thiophenols, nitro compounds, ⁇ -naphthylamines, ⁇ -naphthols, nitroso compounds, and the like. It is done.
- the polymerizable compound-containing liquid crystal composition of the present invention may contain a normal nematic liquid crystal, smectic liquid crystal, cholesteric liquid crystal, antioxidant, ultraviolet absorber, polymerizable monomer and the like in addition to the above-mentioned compounds.
- the polymerizable compound-containing liquid crystal composition of the present invention is useful for a liquid crystal display device, particularly useful for a liquid crystal display device for active matrix driving, and a liquid crystal display for PSA mode, PSVA mode, VA mode, IPS mode or ECB mode. It can be used for an element.
- the polymerizable compound-containing liquid crystal composition of the present invention is provided with liquid crystal alignment ability by polymerizing the polymerizable compound contained therein by ultraviolet irradiation, and controls the amount of light transmitted using the birefringence of the liquid crystal composition.
- liquid crystal display elements used for liquid crystal display elements.
- AM-LCD active matrix liquid crystal display element
- TN nematic liquid crystal display element
- STN-LCD super twisted nematic liquid crystal display element
- OCB-LCD and IPS-LCD in-plane switching liquid crystal display element
- the two substrates of the liquid crystal cell used in the liquid crystal display element can be made of a transparent material having flexibility such as glass or plastic, and one of them can be an opaque material such as silicon.
- a transparent substrate having a transparent electrode layer can be obtained, for example, by sputtering indium tin oxide (ITO) on a transparent substrate such as a glass plate.
- the color filter can be prepared by, for example, a pigment dispersion method, a printing method, an electrodeposition method, or a dyeing method.
- a method for producing a color filter by a pigment dispersion method will be described as an example.
- a curable coloring composition for a color filter is applied on the transparent substrate, subjected to patterning treatment, and cured by heating or light irradiation. By performing this process for each of the three colors red, green, and blue, a pixel portion for a color filter can be created.
- a pixel electrode provided with an active element such as a TFT, a thin film diode, or a metal insulator metal specific resistance element may be provided on the substrate.
- the substrate is opposed so that the transparent electrode layer is on the inside.
- the thickness of the obtained light control layer is 1 to 100 ⁇ m. More preferably, the thickness is 1.5 to 10 ⁇ m.
- the polarizing plate it is preferable to adjust the product of the refractive index anisotropy ⁇ n of the liquid crystal and the cell thickness d so that the contrast is maximized.
- the polarizing axis of each polarizing plate can be adjusted so that the viewing angle and contrast are good.
- a retardation film for widening the viewing angle can also be used.
- the spacer examples include glass particles, plastic particles, alumina particles, and a photoresist material.
- a sealant such as an epoxy thermosetting composition is screen-printed on the substrates with a liquid crystal inlet provided, the substrates are bonded together, and heated to thermally cure the sealant.
- a normal vacuum injection method or an ODF method can be used as a method of sandwiching the polymerizable compound-containing liquid crystal composition between the two substrates.
- an appropriate polymerization rate is desirable in order to obtain good alignment performance of liquid crystals. Therefore, active energy rays such as ultraviolet rays or electron beams are irradiated singly or in combination or sequentially.
- the method of polymerizing by is preferred.
- ultraviolet rays When ultraviolet rays are used, a polarized light source or a non-polarized light source may be used.
- the polymerization is performed in a state where the polymerizable compound-containing liquid crystal composition is sandwiched between two substrates, at least the substrate on the irradiation surface side must be given appropriate transparency to the active energy rays. I must.
- the orientation state of the unpolymerized part is changed by changing conditions such as an electric field, a magnetic field, or temperature, and further irradiation with active energy rays is performed. Then, it is possible to use a means for polymerization.
- a means for polymerization In particular, when ultraviolet exposure is performed, it is preferable to perform ultraviolet exposure while applying an alternating electric field to the polymerizable compound-containing liquid crystal composition.
- the alternating electric field to be applied is preferably an alternating current having a frequency of 10 Hz to 10 kHz, more preferably a frequency of 60 Hz to 10 kHz, and the voltage is selected depending on a desired pretilt angle of the liquid crystal display element. That is, the pretilt angle of the liquid crystal display element can be controlled by the applied voltage. In the MVA mode liquid crystal display element, the pretilt angle is preferably controlled from 80 degrees to 89.9 degrees from the viewpoint of alignment stability and contrast.
- the temperature during irradiation is preferably within a temperature range in which the liquid crystal state of the liquid crystal composition of the present invention is maintained. Polymerization is preferably performed at a temperature close to room temperature, that is, typically 15 to 35 ° C.
- a lamp for generating ultraviolet rays a metal halide lamp, a high-pressure mercury lamp, an ultra-high pressure mercury lamp, or the like can be used.
- a wavelength of the ultraviolet-rays to irradiate it is preferable to irradiate the ultraviolet-ray of the wavelength range which is not the absorption wavelength range of a liquid crystal composition, and it is preferable to cut and use an ultraviolet-ray as needed.
- the intensity of the irradiated ultraviolet light is preferably 0.1 mW / cm 2 to 100 W / cm 2, more preferably 2 mW / cm 2 to 50 W / cm 2 .
- the amount of energy of ultraviolet rays to be irradiated can be adjusted as appropriate, but is preferably 10 mJ / cm 2 to 500 J / cm 2, and more preferably 100 mJ / cm 2 to 200 J / cm 2 .
- the intensity may be changed.
- the time for irradiating with ultraviolet rays is appropriately selected depending on the intensity of the irradiating ultraviolet rays.
- the measured characteristics are as follows.
- T ni Nematic phase-isotropic liquid phase transition temperature (° C.) ⁇ n: Refractive index anisotropy at 20 ° C. ⁇ : Viscosity at 20 ° C. (mPa ⁇ s) ⁇ 1: rotational viscosity at 20 ° C. (mPa ⁇ s) ⁇ : Dielectric anisotropy at 25 ° C.
- LC-1 and LC-2 were each injected into a cell with ITO coated with a polyimide alignment film that induces homeotropic alignment with a cell gap of 3.5 ⁇ m, and a rectangular wave of 1.8 V was applied at a frequency of 1 kHz.
- the polymerizable compound in the polymerizable compound-containing liquid crystal composition was adjusted with a high-pressure mercury lamp through a filter that cuts out ultraviolet rays of 320 nm or less so that the irradiation intensity of the cell surface was adjusted to 100 mW / cm 2 and irradiated with UV.
- a vertically aligned liquid crystal display element obtained by polymerizing was obtained. This liquid crystal display element (PSVA mode) showed high contrast and was confirmed to have a sufficiently fast response.
- the remaining amount of the polymerizable compound in LC-1 and LC-2 which are the polymerizable compound-containing liquid crystal composition of the present invention is sufficiently smaller than that of LC-A which is Comparative Example 1, and less UV irradiation. It was confirmed that the polymerization proceeded sufficiently.
- LC-1 and LC-2 which are the polymerizable compound-containing liquid crystal compositions of the present invention
- LC-A which is Comparative Example 1
- both have a pretilt angle of 85 [°] and can be sufficiently controlled in alignment. It was confirmed that. The pretilt angle was measured at 25 ° C., and TBA105 manufactured by AUTRONIC-MELCHERS was used.
- Comparative Example 2 Example 3 and Example 4
- Polymerizable compound-containing liquid crystal compositions of LC-B (Comparative Example 2), LC-3 (Example 3), LC-4 (Example 4) and LC-5 (Example 5) were prepared, and their physical properties were measured.
- the composition of the polymerizable compound-containing liquid crystal composition and the results of its physical property values are shown in Table 2.
- the polymerizable compound-containing liquid crystal composition shown in Table 2 was injected into a cell with ITO coated with a polyimide alignment film for inducing homeotropic alignment with a cell gap of 3.5 ⁇ m by a vacuum injection method. While applying a rectangular wave, a polymerizable compound-containing liquid crystal composition comprising a high-pressure mercury lamp through a filter that cuts out ultraviolet rays of 320 nm or less and adjusting the irradiation intensity of the cell surface to 100 mW / cm 2 and UV irradiation. A vertically aligned liquid crystal display element obtained by polymerizing the polymerizable compound therein was obtained. This liquid crystal display element (PSVA mode) showed high contrast and was confirmed to have a sufficiently fast response.
- PSVA mode shows high contrast and was confirmed to have a sufficiently fast response.
- the residual amount of the polymerizable compound in the polymerizable compound-containing liquid crystal composition LC-3, LC-4 and LC-5 of the present invention is sufficiently smaller than LC-B which is Comparative Example 2, It was confirmed that the polymerization proceeds sufficiently with less UV irradiation.
- the polymerizable compound-containing liquid crystal composition of the present invention LC-3, LC-4 and LC-5, and LC-B which is Comparative Example 2 all have a pretilt angle of 85 to 86 °. It was confirmed that the orientation can be sufficiently controlled. The pretilt angle was measured at 25 ° C., and TBA105 manufactured by AUTRONIC-MELCHERS was used. (Comparative Example 3, Example 6, Example 7, Example 8, and Example 9) LC-C (Comparative Example 3), LC-6 (Example 6), LC-7 (Example 7), LC-8 (Example 8) and LC-9 (Example 9) polymerizable compound-containing liquid crystal A composition was prepared and its physical property values were measured. Table 3 shows the composition of the polymerizable compound-containing liquid crystal composition and the results of its physical property values.
- the polymerizable compound-containing liquid crystal composition shown in Table 3 was injected into a cell with ITO coated with a polyimide alignment film that induces homeotropic alignment with a cell gap of 3.5 ⁇ m by a vacuum injection method. While applying a rectangular wave, a polymerizable compound-containing liquid crystal composition comprising a high-pressure mercury lamp through a filter that cuts out ultraviolet rays of 320 nm or less and adjusting the irradiation intensity of the cell surface to 100 mW / cm 2 and UV irradiation. A vertically aligned liquid crystal display element obtained by polymerizing the polymerizable compound therein was obtained. This liquid crystal display element (PSVA mode) showed high contrast and was confirmed to have a sufficiently fast response.
- PSVA mode shows high contrast and was confirmed to have a sufficiently fast response.
- LC-6, LC-7, LC-8 and LC-9 which are the polymerizable compound-containing liquid crystal composition of the present invention
- LC-C which is Comparative Example 3 The remaining amount of the polymerizable compound in LC-6, LC-7, LC-8 and LC-9, which are the polymerizable compound-containing liquid crystal composition of the present invention, is compared with LC-C which is Comparative Example 3. It was confirmed that the polymerization proceeded sufficiently with sufficiently less UV irradiation.
- LC-6, LC-7, LC-8 and LC-9 which are the polymerizable compound-containing liquid crystal compositions of the present invention, and LC-C which is Comparative Example 3 all have a pretilt angle of 84 to 86 [°. It was confirmed that the orientation can be sufficiently controlled. The pretilt angle was measured at 25 ° C., and TBA105 manufactured by AUTRONIC-MELCHERS was used.
- the polymerizable compound-containing liquid crystal composition shown in Table 4 was injected by a vacuum injection method into a cell with ITO coated with a polyimide alignment film that induces homeotropic alignment with a cell gap of 3.5 ⁇ m, and 1.8 V at a frequency of 1 kHz. While applying a rectangular wave, a polymerizable compound-containing liquid crystal composition comprising a high-pressure mercury lamp through a filter that cuts out ultraviolet rays of 320 nm or less and adjusting the irradiation intensity of the cell surface to 100 mW / cm 2 and UV irradiation. A vertically aligned liquid crystal display element obtained by polymerizing the polymerizable compound therein was obtained.
- This liquid crystal display element showed high contrast and was confirmed to have a sufficiently fast response.
- LC-D had a residual amount of polymerizable compound of 64 [%]
- LC-10 was 27 [%]
- LC-11 was 23 [%].
- Met When UV was irradiated for 60 [J], the remaining amount of the polymerizable compound of LC-D was 31 [%], whereas LC-10 was 2 [%] and LC-11 was 1 [%].
- LC-10 and LC-11 which are the polymerizable compound-containing liquid crystal compositions of the present invention, are sufficiently smaller than that of LC-D which is Comparative Example 3, and less UV irradiation. It was confirmed that the polymerization proceeded sufficiently.
- LC-10 and LC-11 which are the polymerizable compound-containing liquid crystal compositions of the present invention, each had a pretilt angle of 83 to 85 [°], and it was confirmed that the alignment control was sufficiently possible. .
- the pretilt angle was measured at 25 ° C., and TBA105 manufactured by AUTRONIC-MELCHERS was used.
- the polymerizable compound-containing liquid crystal composition of the present invention has a sufficiently low viscosity ( ⁇ ), and a liquid crystal display device using the same has a sufficiently high response speed and is capable of 3D display, and Since no polymerizable compound remains or is sufficiently suppressed, display unevenness or image sticking does not occur or is extremely suppressed. Since the polymerization reaction rate of the polymerizable compound is sufficiently high, energy costs for production can be reduced, production efficiency can be improved, and uniform and stable orientation control can be obtained, which is confirmed to be very useful. .
Abstract
Description
一般式(N-001)から一般式(N-019)で表される化合物の中では、一般式(N-001)から一般式(N-009)で表される化合物であることが好ましく、一般式(N-001)から一般式(N-003)で表される化合物であることが更に好ましく、一般式(N-001)で表される化合物が特に好ましい。
本発明の重合性化合物含有液晶組成物は、一般式(M)及び一般式(Na)の化合物を同時に含有することが好ましく、式(XX-1)及び一般式(Na)の化合物を同時に含有することが好ましく、式(XX-2)及び一般式(Na)の化合物を同時に含有することが好ましく、式(XX-3)及び一般式(Na)の化合物を同時に含有することが好ましく、一般式(XX-4)及び一般式(Na)の化合物を同時に含有することが好ましく、一般式(M)及び一般式(Nb)の化合物を同時に含有することが好ましく、式(XX-1)及び一般式(Nb)の化合物を同時に含有することが好ましく、式(XX-2)及び一般式(Nb)の化合物を同時に含有することが好ましく、式(XX-3)及び一般式(Nb)の化合物を同時に含有することが好ましく、一般式(XX-4)及び一般式(Nb)の化合物を同時に含有することが好ましい。
(側鎖)
-n -CnH2n+1 炭素数nの直鎖状のアルキル基
n- CnH2n+1- 炭素数nの直鎖状のアルキル基
-On -OCnH2n+1 炭素数nの直鎖状のアルコキシル基 nO- CnH2n+1O- 炭素数nの直鎖状のアルコキシル基
-V -CH=CH2
V- CH2=CH-
-V1 -CH=CH-CH3
1V- CH3-CH=CH-
-2V -CH2-CH2-CH=CH3
V2- CH3=CH-CH2-CH2-
-2V1 -CH2-CH2-CH=CH-CH3
1V2- CH3-CH=CH-CH2-CH2
(連結基)
-CF2O- -CF2-O-
-OCF2- -O-CF2-
-1O- -CH2-O-
-O1- -O-CH2-
-COO- -COO-
(環構造)
Δn :20℃における屈折率異方性
η :20℃における粘度(mPa・s)
γ1 :20℃における回転粘性(mPa・s)
Δε :25℃における誘電率異方性
重合性化合物の残存量@10[J]:UVを10J照射した後の重合性化合物の残存量[%]
重合性化合物の残存量@20[J]:UVを20J照射した後の重合性化合物の残存量[%]
重合性化合物の残存量@50[J]:UVを50J照射した後の重合性化合物の残存量[%]
重合性化合物の残存量@60[J]:UVを60J照射した後の重合性化合物の残存量[%]
プレチルト角 :UVを10J照射した後のプレチルト角[°]
(比較例1、実施例1及び実施例2)
LC-A(比較例1)、LC-1(実施例1)及びLC-2(実施例2)の重合性化合物含有液晶組成物を調製し、その物性値を測定した。重合性化合物含有液晶組成物の構成とその物性値の結果は表1のとおりであった。
(比較例2、実施例3及び実施例4)
LC-B(比較例2)、LC-3(実施例3)、LC-4(実施例4)及びLC-5(実施例5)の重合性化合物含有液晶組成物を調製し、その物性値を測定した。重合性化合物含有液晶組成物の構成とその物性値の結果は表2のとおりであった。
(比較例3、実施例6、実施例7、実施例8及び実施例9)
LC-C(比較例3)、LC-6(実施例6)、LC-7(実施例7)、LC-8(実施例8)及びLC-9(実施例9)の重合性化合物含有液晶組成物を調製し、その物性値を測定した。重合性化合物含有液晶組成物の構成とその物性値の結果は表3のとおりであった。
UVを20[J]照射したとき、LC-Cは重合性化合物の残存量が58[%]であったのに対して、LC-6は23[%]、LC-7は10[%]、LC-8は30[%]、LC-9は28[%]であった。
UVを60[J]照射したとき、LC-Cの重合性化合物の残存量が20[%]であったのに対して、LC-6は0[%]、LC-7は0[%]、LC-8は2[%]、LC-9は2[%]であった。
本発明の重合性化合物含有液晶組成物であるLC-6、LC-7、LC-8及びLC-9中の重合性化合物の残存量は、比較例3であるLC-Cと比較して、十分に少なく、より少ないUV照射によって十分に重合が進むことが確認された。
また、本発明の重合性化合物含有液晶組成物であるLC-6、LC-7、LC-8及びLC-9、比較例3であるLC-Cは、いずれもプレチルト角が84~86[°]であり、十分に配向制御が可能であることが確認された。なお、プレチルト角の測定温度は25℃であり、AUTRONIC-MELCHERS社のTBA105を用いた。
(比較例4、実施例10及び実施例11)
LC-D(比較例4)、LC-10(実施例10)及びLC-11(実施例11)の重合性化合物含有液晶組成物を調製し、その物性値を測定した。重合性化合物含有液晶組成物の構成とその物性値の結果は表4のとおりであった。
UVを20[J]照射したとき、LC-Dは重合性化合物の残存量が64[%]であったのに対して、LC-10は27[%]、LC-11は23[%]であった。
UVを60[J]照射したとき、LC-Dの重合性化合物の残存量が31[%]であったのに対して、LC-10は2[%]、LC-11は1[%]であった。
本発明の重合性化合物含有液晶組成物であるLC-10及びLC-11中の重合性化合物の残存量は、比較例3であるLC-Dと比較して、十分に少なく、より少ないUV照射によって十分に重合が進むことが確認された。
また、本発明の重合性化合物含有液晶組成物であるLC-10及びLC-11は、いずれもプレチルト角が83~85[°]であり、十分に配向制御が可能であることが確認された。なお、プレチルト角の測定温度は25℃であり、AUTRONIC-MELCHERS社のTBA105を用いた。
Claims (18)
- 第一成分として、一般式(M)
- 一般式(Na)、一般式(Nb)又は一般式(Nc)で表される化合物群から選ばれる化合物が、一般式(N-001)から一般式(N-109)
- 更なる成分として、一般式(II)
- 一般式(M)で表される化合物の含有量が0.01質量%から2.00質量%である請求項1から8のいずれか1項に記載の重合性化合物含有液晶組成物。
- 一般式(Na)、一般式(Nb)又は一般式(Nc)で表される化合物の含有量が0.5質量%から50質量%である請求項1~9のいずれか1項に記載の重合性化合物含有液晶組成物。
- 一般式(II)で表される化合物の含有量が10質量%から90質量%である請求項6に記載の重合性化合物含有液晶組成物。
- 一般式(III-A)から一般式(III-J)で表される化合物の含有量が10質量%から90質量%である請求項8に記載の重合性化合物含有液晶組成物。
- 25℃における誘電率異方性(Δε)が-2.0から-8.0の範囲であり、20℃における屈折率異方性(Δn)が0.08から0.14の範囲であり、20℃における粘度(η)が10から30mPa・sの範囲であり、20℃における回転粘性(γ1)が60から130mPa・sの範囲であり、ネマチック相-等方性液体相転移温度(Tni)が60℃から120℃の範囲である請求項1から12のいずれか1項に記載の重合性化合物含有液晶組成物。
- 一般式(Na)、一般式(Nb)又は一般式(Nc)
- 請求項1から13のいずれか1項に記載の重合性化合物含有液晶組成物を用いたことを特徴とする液晶表示素子。
- アクティブマトリックス駆動である請求項15に記載の液晶表示素子。
- PSAモード、PSVAモード、VAモード、IPSモード又はECBモードである請求項15又は16に記載の液晶表示素子。
- プレチルト角が80から89.9度である請求項15から17のいずれか1項に記載の液晶表示素子。
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CN106062134B (zh) * | 2014-05-13 | 2021-09-14 | Dic株式会社 | 向列液晶组合物及使用其的液晶显示元件 |
WO2016035786A1 (ja) | 2014-09-05 | 2016-03-10 | 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 |
CN107075375B (zh) | 2014-12-25 | 2020-11-13 | Dic株式会社 | 向列液晶组合物及使用其的液晶显示元件 |
CN108026449A (zh) * | 2015-10-16 | 2018-05-11 | Dic株式会社 | 向列液晶组合物和使用其的液晶显示元件 |
CN107434973B (zh) * | 2016-05-27 | 2023-01-10 | 江苏和成显示科技有限公司 | 液晶化合物及其组合物和应用 |
CN105954936B (zh) * | 2016-07-01 | 2019-08-20 | 深圳市华星光电技术有限公司 | 垂直配向型液晶面板及液晶面板制作方法 |
EP3725764A1 (en) * | 2017-12-12 | 2020-10-21 | JNC Corporation | Polymerizable compound having methoxymethyl acrylic group, liquid crystal composition, and liquid crystal display device |
JP7001520B2 (ja) | 2018-03-27 | 2022-01-19 | 西松建設株式会社 | コンクリート型枠装置及びコンクリート打設方法 |
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