WO2014030859A1 - 광학 필름 및 이를 포함하는 표시 소자 - Google Patents
광학 필름 및 이를 포함하는 표시 소자 Download PDFInfo
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- WO2014030859A1 WO2014030859A1 PCT/KR2013/007082 KR2013007082W WO2014030859A1 WO 2014030859 A1 WO2014030859 A1 WO 2014030859A1 KR 2013007082 W KR2013007082 W KR 2013007082W WO 2014030859 A1 WO2014030859 A1 WO 2014030859A1
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F20/00—Homopolymers and copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical or a salt, anhydride, ester, amide, imide or nitrile thereof
- C08F20/02—Monocarboxylic acids having less than ten carbon atoms, Derivatives thereof
- C08F20/10—Esters
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
- G02B1/04—Optical elements characterised by the material of which they are made; Optical coatings for optical elements made of organic materials, e.g. plastics
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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
- C09K2019/0444—Liquid crystal materials characterised by the chemical structure of the liquid crystal components, e.g. by a specific unit characterized by a linking chain between rings or ring systems, a bridging chain between extensive mesogenic moieties or an end chain group
- C09K2019/0448—Liquid crystal materials characterised by the chemical structure of the liquid crystal components, e.g. by a specific unit characterized by a linking chain between rings or ring systems, a bridging chain between extensive mesogenic moieties or an end chain group the end chain group being a polymerizable end group, e.g. -Sp-P or acrylate
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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
- 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-)
- C09K2019/122—Ph-Ph
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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
- C09K19/20—Non-steroidal liquid crystal compounds containing at least two non-condensed rings containing at least two benzene rings linked by a chain containing carbon and oxygen atoms as chain links, e.g. esters or ethers
- C09K19/2007—Non-steroidal liquid crystal compounds containing at least two non-condensed rings containing at least two benzene rings linked by a chain containing carbon and oxygen atoms as chain links, e.g. esters or ethers the chain containing -COO- or -OCO- groups
- C09K2019/2035—Ph-COO-Ph
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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
- C09K19/30—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
- C09K19/3066—Cyclohexane rings in which the rings are linked by a chain containing carbon and oxygen atoms, e.g. esters or ethers
- C09K19/3068—Cyclohexane rings in which the rings are linked by a chain containing carbon and oxygen atoms, e.g. esters or ethers chain containing -COO- or -OCO- groups
- C09K2019/3083—Cy-Ph-COO-Ph
Definitions
- the present invention relates to an optical film and a display element including the same. More specifically, the present invention relates to an optical film having excellent liquid crystal alignment and improved photoreaction speed and a display device including the same.
- the thin film transistor liquid crystal display (TFT-LCD) driven by the thin film transistor independently drives individual pixels, so the liquid crystal speed is very high and a high quality moving image can be realized, thereby gradually expanding the application range.
- TFT-LCD thin film transistor liquid crystal display
- liquid crystal As an optical switch in such a TFT-LCD, the liquid crystal must be initially oriented in a predetermined direction on a layer on which the innermost thin film transistor of the display cell is formed.
- a liquid crystal alignment layer is used for this purpose.
- a rubbing process is performed by applying a heat-resistant polymer such as polyimide onto the transparent glass to form a polymer alignment layer, and rubbing the orientation film while rubbing the alignment film while rotating a rotating roller wrapped with a rubbing cloth such as nylon and lei silver. Has been applied.
- a heat-resistant polymer such as polyimide
- liquid crystal alignment (hereinafter, referred to as "optical alignment") by light such as UV.
- Photo-alignment refers to a mechanism for forming a photopolymerizable liquid crystal alignment layer in which a photosensitive group bonded to a constant photoreactive polymer by linearly polarized UV causes a photoreaction, and the main chain of the polymer is aligned in a certain direction, thereby aligning the liquid crystal.
- photoalignment examples include M. Schadt et al. (Jpn. J. Appl. Phys.,
- Polycinnamate-based polymers such as polyvinyl cinnamate (PVCN) or polyvinyl methoxycinnamate (PVMC). If the photo alignment to this, the double bond in the cinnamate by irradiation of UV, the [2 + 2] cyclization was added ([2 + 2] cycloaddition) the reaction is cyclobutane (cyelobutane) is formed by a, which is formed because of the anisotropy The alignment of the liquid crystal molecules is induced by arranging the liquid crystal molecules in one direction.
- PVCN polyvinyl cinnamate
- PVMC polyvinyl methoxycinnamate
- Japanese Patent Laid-Open No. Hei 11-181127 discloses a polymer having a side chain including a photosensitive group such as cinnamic acid group in a main chain such as acrylate and methacrylate, and an alignment film containing the same.
- Korean Patent Laid-Open Publication No. 2002- 0006819 discloses the use of an alignment film made of a polymethacrylic polymer.
- the above-described photoreactive polymers for alignment films have disadvantages such as poor thermal stability of the polymer backbone, thereby degrading the stability of the alignment film, insufficient photoreaction, liquid crystal alignment, or orientation speed.
- a polymer having an acrylic main chain has a disadvantage of greatly lowering the stability of the alignment layer due to low thermal stability, and when the photosensitive group is bound to the main chain, it does not react quickly to the polarized light irradiated onto the alignment layer, so that the liquid crystal alignment or alignment rate is high.
- the liquid crystal alignment or alignment rate In the case of lowering, process efficiency may be lowered, or the liquid crystal alignment of the liquid crystal display element may be insufficient, resulting in small dichroic ratio and deterioration in contrast.
- an object of the present invention is to provide an optical film having excellent liquid crystal alignment and improved photoreaction rate.
- an object of this invention is to provide the display element containing the said liquid crystal film.
- the present invention is a first optically anisotropic layer comprising at least one liquid crystal compound represented by the formula (1);
- Arl to Ar3 are each independently the same as or different from each other, arylene having 6 to 40 carbon atoms, and the arylene may be substituted with alkyl or halogen substituents having 1 to 10 carbon atoms;
- A1 and A2 are each independently represented by the same formula la or the same as or different from each other;
- this invention provides the display element containing the said optical film.
- FIG. 1 is a perspective view showing an optical film according to an embodiment of the present invention.
- each layer or element when each layer or element is referred to as being formed “on” or “on” of each layer or element, it means that each filling or element is directly formed on each layer or element, Means that another layer or element may be additionally formed between the object, the object and the substrate.
- the optical film of the present invention comprises a first optically anisotropic layer containing at least one liquid crystal compound represented by the following formula (1);
- It includes a second optically anisotropic layer comprising a photoreactive polymer comprising a repeating unit represented by the formula (2a) or 2b.
- Arl to Ar3 are each independently the same as or different from each other, arylene having 6 to 40 carbon atoms, and the arylene may be substituted with an alkyl or halogen substituent having 1 to 10 carbon atoms;
- E1 and E2 are each independently the same or different from each other in simple combinations
- A1 and A2 are each independently represented by the same formula la or the same as or different from each other;
- Jm and Mm are each independently the same as or different from each other, a simple bond, alkylene having 1 to 10 carbon atoms or cycloalkylene having 3 to 10 carbon atoms, Qm is alkyl having 1 to 10 carbon atoms, acrylate, methacrylate, or Epoxy groups;
- q is an integer from 0 to 4,
- n is an integer from 50 to 5,000
- At least one of R1, R2, R3, and R4 is a radical selected from the group consisting of Formulas 3a and 3b,
- Rl, R2, R3, and R4 except Rl, R2, R3, and R4, except radicals of Formula 3a or 3b are the same as or different from each other, and each independently hydrogen; halogen; Substituted or unsubstituted linear or branched alkyl having 1 to 20 carbon atoms; Substituted or unsubstituted linear or branched alkenyl having 2 to 20 carbon atoms; Substituted or unsubstituted linear or branched alkynyl having 2 to 20 carbon atoms; Substituted or unsubstituted cycloalkyl having 3 to 12 carbon atoms; Substituted or unsubstituted aryl having 6 to 40 carbon atoms; And it is selected from the group consisting of a polar group containing at least one selected from oxygen, nitrogen, phosphorus, sulfur, silicon, and boron,
- R1 to R4 are hydrogen; halogen; Or when it is not the polar functional group, at least one combination selected from the group consisting of R1 and R2, R3 and R4 is connected to each other to form an alkylidene group having 1 to 10 carbon atoms, or R1 or R2 is any of R3 and R4 It may be linked with one to form a saturated or unsaturated aliphatic ring having 4 to 12 carbon atoms, or an aromatic ring having 6 to 24 carbon atoms.
- A is a simple bond, oxygen, sulfur or -NH-,
- B is a simple bond, substituted or unsubstituted alkylene, carbonyl, carboxyl, ester, substituted or unsubstituted C6 to C40 arylene, and substituted or unsubstituted C6 to C40 hetero Selected from the group consisting of arylene,
- X is oxygen or sulfur
- R9 is a simple bond, substituted or unsubstituted alkylene having 1 to 20 carbon atoms, substituted or unsubstituted alkenylene having 2 to 20 carbon atoms, substituted or unsubstituted cycloalkylene having 3 to 12 carbon atoms, substituted or unsubstituted Arylene having 6 to 40 carbon atoms, substituted or unsubstituted aralkylene having 7 to 15 carbon atoms, and substituted or unsubstituted alkynylene having 2 to 20 carbon atoms,
- At least one of R10 to R14 is a radical represented by -L-R15-R16- (substituted or unsubstituted aryl having 6 to 40 carbon atoms), except for these, R10 to R14 are the same as or different from each other, and each independently hydrogen.
- Halogen substituted or unsubstituted alkyl having 1 to 20 carbon atoms; Substituted or unsubstituted alkoxy having 1 to 20 carbon atoms; Substituted or unsubstituted aryloxy having 6 to 30 carbon atoms; It is selected from the group consisting of substituted or unsubstituted aryl having 6 to 40 carbon atoms and hetero aryl having 6 to 40 carbon atoms containing a hetero element of Group 14, 15 or 16,
- L is selected from the group consisting of oxygen, sulfur, -NH-, substituted or unsubstituted alkylene having 1 to 20 carbon atoms, carbonyl, carboxy, -CONH- and substituted or unsubstituted arylene having 6 to 40 carbon atoms; ,
- R15 is substituted or unsubstituted alkyl having 1 to 10 carbon atoms
- the radical may be a radical represented by the following formula (4).
- R15 and R16 are the same as defined in Formula 3a and 3b,
- R17 to R21 are the same as or different from each other, and each independently hydrogen; halogen; Substituted or unsubstituted alkyl having 1 to 20 carbon atoms; Substituted or unsubstituted alkoxy having 1 to 20 carbon atoms; Substituted or unsubstituted aryloxy having 6 to 30 carbon atoms; Substituted or unsubstituted aryl having 6 to 40 carbon atoms; It is selected from the group consisting of a hetero aryl having 6 to 40 carbon atoms containing a hetero element of Group 14, 15 or 16, and a substituted or unsubstituted alkoxyaryl having 6 to 40 carbon atoms.
- the polar functional group may be selected from the group consisting of the functional groups listed below.
- p are each independently an integer of 1 to 10,
- R5 is substituted or unsubstituted linear or branched alkylene having 1 to 20 carbon atoms; Substituted or unsubstituted linear or branched alkenylene having 2 to 20 carbon atoms; Substituted or unsubstituted linear or branched alkynylene having 2 to 20 carbon atoms; Substituted or unsubstituted cycloalkylene having 3 to 12 carbon atoms; Substituted or unsubstituted arylene having 6 to 40 carbon atoms; Substituted or unsubstituted carbonyloxyylene having 1 to 20 carbon atoms; Or substituted or unsubstituted alkoxylene having 1 to 20 carbon atoms,
- R6, R7 and R8 are each independently hydrogen; halogen; Substituted or unsubstituted linear or branched alkyl having 1 to 20 carbon atoms; Substituted or unsubstituted linear or branched alkenyl having 2 to 20 carbon atoms; Substituted or unsubstituted linear or branched alkynyl having 2 to 20 carbon atoms; Substituted or unsubstituted cycloalkyl having 3 to 12 carbon atoms; Substituted or unsubstituted aryl having 6 to 40 carbon atoms; Substituted or unsubstituted alkoxy having 1 to 20 carbon atoms; And substituted or unsubstituted carbonyloxy having 1 to 20 carbon atoms.
- substituted or unsubstituted aryl having 6 to 40 carbon atoms; Or hetero aryl having 6 to 40 carbon atoms including hetero group 14, 15 or 16 hetero elements may be selected from the group consisting of the functional groups listed below.
- R'10 to R'18 are the same as or different from each other, and each independently substituted or unsubstituted linear or branched alkyl having 1 to 20 carbon atoms, substituted or unsubstituted alkoxy having 1 to 20 carbon atoms, substituted or unsubstituted Aryloxy having 6 to 30 carbon atoms, and substituted or unsubstituted aryl having 6 to 40 carbon atoms.
- substituent looking at the definition of each substituent in detail as follows.
- Alkyl means a straight or branched chain saturated monovalent hydrocarbon moiety of 1 to 20, preferably 1 to 10, more preferably 1 to 6 carbon atoms. Alkyl groups may be optionally substituted by one or more halogen substituents. Examples of alkyl groups include methyl, ethyl, propyl, 2-propyl, n-butyl, iso-butyl, tert-butyl, pentyl, nucleus, dodecyl, fluoromethyl, difluoromethyl, trifluoromethyl, chloromethyl, Dichloromethyl, trichloromethyl, iodomethyl, bromomethyl and the like.
- Alkenyl means a straight or branched chain monovalent hydrocarbon moiety of 1 to 20, preferably 2 to 10, more preferably 2 to 6 carbon atoms comprising at least one carbon-carbon double bond. . Alkenyl groups may be bonded through a carbon atom comprising a carbon-carbon double bond or through a saturated carbon atom. Alkenyl groups may be optionally substituted by one or more halogen substituents. Examples of the alkenyl group include ethenyl, 1-propenyl, 2-propenyl, 2-butenyl, 3-butenyl, pentenyl, 5-nuxenyl, dodecenyl and the like.
- Cycloalkyl means a saturated or unsaturated non-aromatic monovalent monocyclic, bicyclic or tricyclic hydrocarbon moiety of 3 to 12 ring carbons and may be optionally substituted by one or more halogen substituents. .
- Aryl means a monovalent monocyclic, bicyclic or tricyclic aromatic hydrocarbon moiety having 6 to 20, preferably 6 to 12 ring atoms, which may be optionally substituted by one or more halogen substituents or the like.
- Examples of the aryl group include phenyl, naphthalenyl, fluorenyl and the like.
- Alkoxyaryl means that at least one hydrogen atom of the aryl group as defined above is substituted with an alkoxy group.
- alkoxyaryl group examples include methoxyphenyl, ethoxyphenyl, propoxyphenyl, butoxyphenyl, phenoxyphenyl, nucleooxyphenyl, hepoxy, oxoxy, nanoxy, mepsicybiphenyl, methoxynaphthalenyl, Methoxy fluorenyl, methoxy anthracenyl, ethoxy anthracenyl, propoxy anthracenyl methoxy fluorenyl and the like.
- Arylalkyl means that at least one hydrogen atom of the alkyl group as defined above is substituted with an aryl group, and may be optionally substituted with one or more halogen substituents. For example, benzyl, benzhydryl, trityl, etc. are mentioned.
- Alkynyl refers to a monovalent hydrocarbon moiety of 2 to 20 carbon atoms, preferably 2 to 10, more preferably 2 to 6, straight or branched chains containing at least one carbon-carbon triple bond. it means. Alkynyl groups may be bonded through a carbon atom comprising a carbon-carbon triple bond or through a saturated carbon atom. Alkynyl groups may be optionally substituted by one or more halogen substituents. For example, ethynyl, propynyl, etc. are mentioned.
- Alkylene means a straight or branched chain saturated divalent hydrocarbon moiety of 1 to 20, preferably 1 to 10, more preferably i to 6 carbon atoms. Alkylene groups may be optionally substituted by one or more halogen substituents. As an example of an alkyl group, methylene, ethylene, propylene, butylene, nuxylene, etc. are mentioned.
- Alkenylene refers to a straight or branched chain divalent hydrocarbon moiety of 2 to 20, preferably 2 to 10, more preferably 2 to 6 carbon atoms containing at least one carbon-carbon double bond. it means. Alkenylene groups may be bonded through a carbon atom comprising a carbon-carbon double bond and / or through a saturated carbon atom. Alkenylene groups may be optionally substituted by one or more halogen substituents.
- Cycloalkylene means a saturated or unsaturated non-aromatic divalent monocyclic, bicyclic or tricyclic hydrocarbon moiety of 3 to 12 ring carbons and may be optionally substituted by one or more halogen substituents. .
- cyclopropylene, cyclobutylene, etc. are mentioned.
- Arylene means a divalent monocyclic, bicyclic or tricyclic aromatic hydrocarbon moiety having 6 to 20, preferably 6 to 12 ring atoms, which may be optionally substituted by one or more halogen substituents. have.
- the aromatic portion of the aryl group contains only carbon atoms. Phenylene etc. are mentioned as an example of an arylene group.
- Arylalkylene means a divalent moiety in which at least one hydrogen atom of the alkyl group as defined above is substituted with an aryl group, and may be optionally substituted by one or more halogen substituents.
- benzylene etc. can be mentioned.
- Alkynylene refers to a divalent hydrocarbon moiety of 2 to 20 carbon atoms, preferably 2 to 10, more preferably 2 to 6, straight or branched chains containing at least one carbon-carbon triple bond. it means. Alkynylene groups may be bonded through a carbon atom comprising a carbon-carbon triple bond or through a saturated carbon atom. Alkynylene groups may be optionally substituted by one or more halogen substituents. For example, ethynylene, propynylene, etc. are mentioned.
- the photoreactive polymer including the repeating unit represented by Formula 2a or 2b
- a large free space may be secured between the photoreactors due to the bulky aralkyl structure bonded through the linker L at the end of the photoreactor. have.
- the photoreactors can move (flow) or react relatively freely in a free space largely secured. Therefore, the photoreaction polymer may exhibit more excellent light response, orientation speed, and optical orientation.
- the photoreactive polymer is a photoreactor can change the orientation direction relatively freely according to the change in the polarization direction. Therefore, the change in the alignment direction according to the polarization direction can occur more smoothly, and can be preferably applied to a patterned retarder, a patterned cell alignment film, and the like.
- the repeating unit of Formula 2a or 2b included in the photoreactive polymer is structurally hard, and the photoreactive polymer including the same has a glass transition temperature (Tg) of about 300 ° C. or higher, preferably about 300 to about 350 Since it is relatively high at ° C, it can exhibit excellent thermal stability compared to conventionally known photobanung polymers.
- Tg glass transition temperature
- the repeating unit of Formula 2a or 2b constituting the photoreactive polymer may have a polymerization degree of about 50 to 5,000, preferably about 100 to 4,000, and more preferably about 1,000 to 3,000.
- the photo-banung polymer is 10,000 to 1,000,000, preferably 20,000 It may have a weight average molecular weight of from 500,000. Accordingly, the photo-banung polymer may be appropriately included in the coating composition for forming the alignment layer, and may exhibit excellent coating properties, but the alignment layer formed therefrom may exhibit excellent liquid crystal alignment.
- the photoreaction polymers described above may exhibit photoreactivity under exposure to polarized light having a wavelength of about 150 to about 450 nm, for example, wavelengths of about 200 to about 400 nm, more specifically wavelengths of about 250 to about 350 nm. Under the exposure of the polarized light in the UV region having, excellent light reflection properties and orientation can be exhibited.
- the composition comprising a photo-banung polymer comprising a repeating unit represented by the formula 2a or 2b further comprises a photoactive agent, (meth) acrylate-based compound and photoinitiator can do. By adding a light activator to the photoreactant polymer, it is possible to increase the reaction properties of the photoreactant group.
- Examples of the photoactive agent is butyl -9H- thioxanthone den in 2,4-9-one (2, 4 -ethyl-9H- thioxanthen-9-one), 1- isopropyl -9H- thioxanthone Baden- 9-one (1-isopropyl-9H-thioxanthen-9-one), 1,3-difluoro-9H-thioxane-9-one (l, 3-difluoro-9H-thioxanthen-9-one), And 2-trifluoromethyl-9H-thioxane-9-one (2-trifluoromethyl-9H-thioxanthen-9-one) and the like.
- the (meth) acrylate-based compound is, for example, pentaerythritol triacrylate (pentaerythritol triacrylate), tri (2- acrylyloxy ethyl) isosinurate (tris ( 2- acrylolyloxyethyl) isocynurate), tri It may be at least one selected from the group consisting of methylolpropane triacrylate, and dipentaerythritol hexaacrylate.
- Irgacure 907, 819, etc. may be used as the photoinitiator, but the present invention is not limited thereto.
- the content of the components is ' about 50 to about 70% by weight of the photoreactive polymer comprising a repeating unit represented by Formula 2a or 2b based on the total weight of the composition, the light an active claim from about i to about 20 parts by weight 0/0, the 'above-mentioned (meth) acrylate-based compound from about 20 to about 40 weight 0 /. in, and the photoinitiator of about 1 to about 15 increased 0 /.
- the photoreactive polymer comprising a repeating unit represented by Formula 2a or 2b based on the total weight of the composition
- the light an active claim from about i to about 20 parts by weight 0/0
- the 'above-mentioned (meth) acrylate-based compound from about 20 to about 40 weight 0 /. in
- Can be the photoreactive polymer comprising a repeating unit represented by Formula 2a or 2b
- the optical film of this invention contains the 1st optically anisotropic layer containing a liquid crystal compound.
- the liquid crystal compound included in the first optically anisotropic layer includes at least one compound represented by Chemical Formula 1 below.
- Arl to Ar3 are each independently the same as or different from each other, arylene having 6 to 40 carbon atoms, and the arylene may be substituted with alkyl or halogen substituents having 1 to 10 carbon atoms;
- A1 and A2 are each independently represented by the same formula la or the same as or different from each other;
- Jm and Mm are each independently the same as or different from each other, a simple bond, alkylene having 1 to 10 carbon atoms or cycloalkylene having 3 to 10 carbon atoms,
- Qm is an alkyl, acrylate, methacrylate or epoxy group having 1 to 10 carbon atoms.
- the first optically anisotropic insect is, in addition to the liquid crystal compound represented by Formula 1, one monoacrylate-based compound It may further include the above.
- the physical characteristics such as the orientation or the light reflection property required for the optical film are determined by the interaction between the liquid crystal compound included in the first optically anisotropic layer and the light semi-annular polymer included in the second optically anisotropic layer. Therefore, this interaction may vary depending on the structural properties of the liquid crystal compound and the photoreflective polymer.
- the optical film of the present invention includes a liquid crystal compound represented by the formula (1) and a photo-banung polymer comprising a repeating unit represented by the formula (2) as a separate layer, respectively. Therefore, as the liquid crystal compound and the photoreactive polymer are combined without unnecessary interaction when included in one layer, they exhibit excellent orientation or photoreactivity with appropriate bonding force. Accordingly, an optical film having improved liquid crystal alignment and photoreaction speed may be provided.
- the optical film of the present invention can be produced according to conventional methods known in the art.
- a suitable organic composition comprising a photo-banung polymer comprising a repeating unit represented by the formula (2a) or (2b), a photoactivator 1, a (meth) acrylate-based compound as a binder and a photoinitiator Dissolve in solvent to make a solution.
- the organic solvent may be toluene, anisole, anisole, chlorobenzene, dichloroethane, cyclohexane, cyclopentane, or propylene glycol methyl ether acetate (propylene). glycol methyl ether acetate) and the like, but are not limited thereto.
- the solid content of the solution may be about 1 to about 15% by weight relative to the weight of the solution.
- the solid content of the solution may be about 1 to about 15% by weight relative to the weight of the solution.
- from about 10 to about 15 weight 0/0 preferably in order to cast the film, in order to make a thin film of about 1 to about 5 weight 0 /. Is preferred.
- the prepared solution is dropped on a substrate or glass, spin-coated, bar-coated, solvent-cast, etc., and then dried in an oven or a hot plate.
- the second optically anisotropic layer is formed by irradiating polarized UV to make the double bonds of the photoreactor dimer in a constant direction.
- the first optically anisotropic layer may be formed by coating and drying a solution containing the liquid crystal compound represented by Chemical Formula 1 on the second optically anisotropic layer.
- liquid crystal compound and the photoinitiator may be dissolved in an organic solvent to prepare the same.
- the liquid crystal compound solution The content of the liquid crystal compound is not particularly limited, but may be about 5 to about 70 parts by weight based on 100 parts by weight of the total liquid crystal compound solution, preferably about 5 to about 50 parts by weight.
- a photoinitiator a chiral agent, a surfactant, a polymerizable monomer, a polymer, and the like may be added to the liquid crystal compound solution as long as the liquid crystal alignment is not prevented.
- halogenated hydrocarbons such as chloroform, tetrachloroethane, trichloroethylene, tetrachloroethylene and chlorobenzene
- Aromatic hydrocarbons such as benzene, toluene, xylene, methoxy benzene and 1,2-dimethicene benzene
- Ketones such as acetone, methyl ethyl ketone, cyclonucleanone and cyclopentanone
- Alcohols such as isopropyl alcohol and n-butane
- Cellosolves such as methyl cellosolve, ethyl cellosolve, and butyl cellosolve may be used, but are not limited thereto, and may be used in the form of a single or a mixture.
- the present invention provides a display device comprising the optical film.
- the optical film which concerns on this invention can be used as the optical member for liquid crystal display devices.
- Examples include Super Twist Nematic (STN) type LCD, Thin Film Transistor-Twisted Nematic (TFT-TN) type LCD, Vertical Alignment (VA) type LCD, and In-Plane (IPS) type.
- Retardation films such as Switching type LCD; Half wave plate; Quarter wave plate; Reverse wavelength dispersion film; Optical compensation films; Color filters; Laminated film with a polarizing plate; Polarizing plate compensation film, etc. are mentioned.
- the display device of the present invention may include one or two or more optical films.
- a display element comprising a liquid crystal cell and a first polarizing plate and a second polarizing plate respectively provided on both surfaces of the liquid crystal cell
- the optical film according to the present invention comprises the liquid crystal cell and the first polarizing plate and / or the first polarizing plate. It may be provided between the two polarizing plates. That is, an optical film may be provided between the first polarizing plate and the liquid crystal cell, and an optical film may be provided between the second polarizing plate and the liquid crystal cell, or between the first polarizing tube and the liquid crystal sal and between the second polarizing plate and the liquid crystal sal. Or more than that.
- the display device of the present invention can be manufactured according to conventional methods known in the art.
- the display element comprises the steps of preparing a first substrate and a second substrate as a substrate; Forming a second optically anisotropic layer on the substrate; Drying the second optically anisotropic layer formed on the substrate; Irradiating UV light to the dried second optically anisotropic layer to orient the light; Forming a first optically anisotropic layer on the second optically anisotropic layer; And attaching the two substrates such that the liquid crystal layer is interposed between the two substrates.
- a solution containing a (meth) acrylate-based compound and a photoinitiator as a photobanung polymer, a photoactive agent, and a binder including a repeating unit represented by Formula 2a or 2b on a substrate is dissolved in a suitable organic solvent. ⁇ Made and then dried.
- the alignment can be imparted in any desired direction by irradiating linearly polarized ultraviolet rays in a predetermined direction. This induces primary molecular orientation in the direction (absorption axis) perpendicular to the transmission axis of the ultraviolet polarizing plate (wire grid polarizing plate) through the dimerization (adding ring) reaction of the photoreactive polymer constituting the optically anisotropic layer. Done.
- the orientation direction of the optically anisotropic layer can be adjusted to any desired angle, so that the optical axis of the first optically anisotropic layer formed on the second optically anisotropic layer in the future may be adjusted to the advancing direction of the substrate. It is possible to adjust the angle.
- a solution containing a liquid crystal compound is coated and dried on the first optically anisotropic layer to form a first optically anisotropic layer.
- the first optically anisotropic layer oriented on the first optically anisotropic layer is fixed by polymerization and curing through ultraviolet irradiation.
- one of the two substrates having the optical film according to the present invention is applied to the end of the glass substrate by applying a light semi-finished adhesive containing a ball spacer to the end of the glass substrate, and then bonded to the other substrate to the adhesive coated portion Only the ultraviolet rays are bonded to the cells. After that, a liquid crystal is injected into the completed cell and heat treated to complete the display device.
- the display element of this invention provided with the said optical film shows the outstanding liquid-crystal orientation and photoreaction rate.
- FIG. 1 is a diagram illustrating an optical film manufactured according to an embodiment of the present invention.
- an optical film 100 may include a first optically anisotropic layer 20; And a second optically anisotropic layer 10.
- the exposure was made by using a high-pressure mercury lamp of 200mW / cm 2 intensity as a light source and irradiating UV-coated film for 5 seconds using UV wires polarized perpendicular to the film's direction using Moxtek's wire grid polarizer. By providing orientation to form a second optically anisotropic layer.
- the prepared liquid crystal solution was coated on the second optically anisotropic layer formed by the roll coating method to have a thickness of 1 j3 ⁇ 4m after drying, and then dried at 80 ° C. for 2 minutes to align the liquid crystal molecules to form the first optically anisotropic layer.
- Example 2 Example 2
- An optical film was manufactured according to the same method as Example 1 except for using RM-T709 of Chemical Formula 10 instead of RM257.
- CelAc means cellulose acetate. Comparative Example 3
- Cel means cellulose. Comparative Example 4
- CelAc means cellulose acetate.
- optical films of Examples 1 to 14 and Comparative Examples 1 to 4 were respectively disposed between the polarizing plates arranged in an orthogonal state. Then, light leakage was photographed using ECLIPSE LV100POL (manufactured by Nikon).
- the optical film prepared in Example according to the present invention showed excellent photoreactivity compared to the comparative example.
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- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
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Abstract
Description
Claims
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JP2015528391A JP2015529343A (ja) | 2012-08-21 | 2013-08-06 | 光学フィルムおよびこれを含む表示素子 |
CN201380041746.0A CN104520361B (zh) | 2012-08-21 | 2013-08-06 | 光学膜及包括该光学膜的显示装置 |
US14/419,178 US9952364B2 (en) | 2012-08-21 | 2013-08-06 | Optical film and display device comprising the same |
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KR20120091436 | 2012-08-21 | ||
KR10-2012-0091436 | 2012-08-21 | ||
KR1020130092759A KR101632059B1 (ko) | 2012-08-21 | 2013-08-05 | 광학 필름 및 이를 포함하는 표시 소자 |
KR10-2013-0092759 | 2013-08-05 |
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JP2005084277A (ja) * | 2003-09-08 | 2005-03-31 | Fuji Photo Film Co Ltd | 光学異方性層、位相差板、円偏光板および画像表示装置 |
KR20080046224A (ko) * | 2005-10-31 | 2008-05-26 | 가부시키가이샤 아데카 | 축합환을 가지는 중합성 액정 화합물 및 그 중합성 액정화합물의 단독 중합물 및 공중합물 |
JP2008233654A (ja) * | 2007-03-22 | 2008-10-02 | Fujifilm Corp | 光学補償フィルム、並びにそれを用いた偏光板及び液晶表示装置 |
KR20100083103A (ko) * | 2009-01-12 | 2010-07-21 | 주식회사 엘지화학 | 할로겐계 치환기를 갖는 광반응성 작용기를 포함하는 노보넨계 중합체, 이의 제조방법 및 이를 이용한 배향막 |
KR20100105478A (ko) * | 2009-03-18 | 2010-09-29 | 칫소가부시키가이샤 | 중합성 액정 화합물, 중합성 액정 조성물 및 그 중합체 |
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JP2005084277A (ja) * | 2003-09-08 | 2005-03-31 | Fuji Photo Film Co Ltd | 光学異方性層、位相差板、円偏光板および画像表示装置 |
KR20080046224A (ko) * | 2005-10-31 | 2008-05-26 | 가부시키가이샤 아데카 | 축합환을 가지는 중합성 액정 화합물 및 그 중합성 액정화합물의 단독 중합물 및 공중합물 |
JP2008233654A (ja) * | 2007-03-22 | 2008-10-02 | Fujifilm Corp | 光学補償フィルム、並びにそれを用いた偏光板及び液晶表示装置 |
KR20100083103A (ko) * | 2009-01-12 | 2010-07-21 | 주식회사 엘지화학 | 할로겐계 치환기를 갖는 광반응성 작용기를 포함하는 노보넨계 중합체, 이의 제조방법 및 이를 이용한 배향막 |
KR20100105478A (ko) * | 2009-03-18 | 2010-09-29 | 칫소가부시키가이샤 | 중합성 액정 화합물, 중합성 액정 조성물 및 그 중합체 |
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