WO2008032615A1 - Phase difference film, optical laminate, liquid crystal panel, and liquid crystal display device - Google Patents
Phase difference film, optical laminate, liquid crystal panel, and liquid crystal display device Download PDFInfo
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- WO2008032615A1 WO2008032615A1 PCT/JP2007/067272 JP2007067272W WO2008032615A1 WO 2008032615 A1 WO2008032615 A1 WO 2008032615A1 JP 2007067272 W JP2007067272 W JP 2007067272W WO 2008032615 A1 WO2008032615 A1 WO 2008032615A1
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/30—Polarising elements
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
- C08J5/18—Manufacture of films or sheets
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/30—Polarising elements
- G02B5/3083—Birefringent or phase retarding elements
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/13363—Birefringent elements, e.g. for optical compensation
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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
- C09K2323/00—Functional layers of liquid crystal optical display excluding electroactive liquid crystal layer characterised by chemical composition
- C09K2323/03—Viewing layer characterised by chemical composition
-
- 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
- C09K2323/00—Functional layers of liquid crystal optical display excluding electroactive liquid crystal layer characterised by chemical composition
- C09K2323/03—Viewing layer characterised by chemical composition
- C09K2323/031—Polarizer or dye
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/13363—Birefringent elements, e.g. for optical compensation
- G02F1/133637—Birefringent elements, e.g. for optical compensation characterised by the wavelength dispersion
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F2202/00—Materials and properties
- G02F2202/40—Materials having a particular birefringence, retardation
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/31504—Composite [nonstructural laminate]
- Y10T428/31942—Of aldehyde or ketone condensation product
Definitions
- Retardation film optical laminate, liquid crystal panel, and liquid crystal display device
- the present invention relates to a retardation film having excellent retardation wavelength dispersion characteristics.
- a liquid crystal display device (hereinafter sometimes referred to as “LCD”) is an element that displays characters and images by utilizing the electro-optical characteristics of liquid crystal molecules.
- LCDs are widely used in mobile phones, notebook computers, liquid crystal televisions, and so on.
- LCD uses liquid crystal molecules with optical anisotropy, so even if it has excellent display characteristics in one direction, the screen may become dark or unclear in the other direction. Then there is a problem.
- retardation films are widely used in LCDs.
- the conventional retardation film since the conventional retardation film has a relatively small in-plane birefringence, the film must be formed thick in order to develop a desired retardation value. Furthermore, further improvement is required for the chromatic dispersion characteristics of the retardation value where the difference between the retardation values of the short wavelength side and the long wavelength side is relatively small.
- a retardation film using an acetal structure polymer having an aromatic group as a side chain is also known (Patent Document 2).
- the retardation film is preferable because it exhibits reverse wavelength dispersion characteristics.
- Patent Document 1 WO00 / 26705
- Patent Document 2 Japanese Patent Application Publication No. 2006-65258 Disclosure of the invention
- a first object of the present invention is to provide a retardation film having a large in-plane birefringence. Furthermore, a second object of the present invention is to provide a retardation film that exhibits reverse wavelength dispersion characteristics and has a large difference between the retardation value on the short wavelength side and the retardation value on the long wavelength side.
- the retardation film of the present invention contains a thermoplastic polymer having at least a side chain component (A) oriented in a direction substantially perpendicular to the slow axis direction, and the side chain component (A) Absorption edge wavelength ( ⁇ ) force of 330nm or more, in-plane phase difference at wavelength 450nm
- the value (Re [450]) is smaller than the in-plane retardation value (Re [650]) at a wavelength of 650 nm.
- the retardation film of the present invention exhibits optical characteristics (reverse wavelength dispersion characteristics) in which the retardation value measured with short-wavelength light is smaller than the retardation value measured with long-wavelength light.
- the optical properties are relatively high.
- the retardation film of the present invention exhibits optical characteristics having a large difference between the retardation value on the short wavelength side and the retardation value on the long wavelength side. A retardation film having such optical characteristics is extremely useful for improving the display characteristics of a liquid crystal display device.
- FIG. 1 is a schematic cross-sectional view of an optical laminate in a preferred embodiment of the present invention for both 1A and IB.
- FIG. 2 is a schematic cross-sectional view of a liquid crystal panel in one embodiment of the present invention.
- FIG. 3 is a schematic cross-sectional view of a liquid crystal panel according to another embodiment of the present invention.
- FIG. 4 is a schematic cross-sectional view of a liquid crystal display device according to a preferred embodiment of the present invention.
- FIG. 5 is a graph showing the measurement results of the absorption edge wavelength of the retardation film of Example 1.
- FIG. 6 is a graph showing the measurement results of the absorption edge wavelength of the retardation film of Example 2.
- FIG. 7 is a graph showing the measurement results of the absorption edge wavelength of the retardation film of Comparative Example 1.
- FIG. 8 is a graph showing the measurement results of the absorption edge wavelength of the retardation film of Comparative Example 2.
- the absorption edge wavelength ( ⁇ ) is the limit on the long wavelength side of the ultraviolet absorption spectrum of the polymer cut-off
- the wavelength corresponding to the field (the wavelength at which absorption is eliminated).
- the absorption edge wavelength (E :) is "JASCO cut-off"
- UV / Vis spectrophotometer V-560 manufactured by UV / Vis spectrophotometer
- the UV-visible spectrum in the slow axis direction and the fast axis direction of the retardation film is measured, and the value is obtained from the wavelength force at which the absorbance is 0.2.
- nx is the refractive index in the direction in which the in-plane refractive index of the retardation film is maximum (ie, the slow axis direction), and “ny” is the in-plane retardation of the retardation film.
- Thickness direction retardation value (Rth [; L]) is the thickness direction retardation value at 23 ° C and wavelength ⁇ (nm).
- the retardation film of the present invention contains a thermoplastic polymer having at least a side chain component (A) oriented in a direction substantially perpendicular to the slow axis direction, and the absorption edge of the side chain component (A).
- the value (Re [450]) is smaller than the in-plane retardation value (Re [650]) at a wavelength of 650 nm.
- the “retardation film” is an optical film having birefringence in the plane and in the Z or thickness direction.
- the retardation film is your Keru plane and / / or the thickness direction of the birefringence at a wavelength 550nm ( ⁇ ⁇ [550]) Power 1 X 10- 4 or more.
- thermoplastic polymer having at least the chain component (A) is a finding that was first discovered by the present inventors and is unexpected. Excellent effect.
- the absorption edge wavelength ( ⁇ ) is preferably 335 nm or more, more preferably 340 cut-off.
- the retardation film preferably has a small absorption power S in the visible light region.
- the above-mentioned retardation is preferably 400 nm or less, and more preferably cut-off.
- the retardation film has a difference ( ⁇ between the in-plane retardation value (Re [650]) at a wavelength of 650 nm and the in-plane retardation value (Re [450]) at a wavelength of 450 nm.
- Re R
- a retardation film with a large A Re has a retardation value and wavelength in a wide area of visible light.
- the ratio (Re / ⁇ ) to is constant. For this reason, the force and the retardation film can obtain a high contrast ratio and excellent color reproducibility when used in a liquid crystal display device, for example.
- the details of the retardation film of the present invention will be described.
- thermoplastic polymer used in the present invention has at least a side chain component ( ⁇ ) oriented substantially perpendicular to the slow axis direction, and the absorption edge wavelength ( ⁇ ⁇ ) of the side chain component ( ⁇ ). ⁇ cut
- thermoplastic refers to a property of softening by heating to show plasticity and solidifying by cooling.
- Polymer includes a polymer having a degree of polymerization (in the case of a polymer comprising a plurality of constituent units, the total degree of polymerization of each constituent unit) of 20 or more and a large weight average molecular weight! / Furthermore, it includes a low polymer (also called an oligomer) having a degree of polymerization of 2 or more and less than 20 and a weight average molecular weight of about several thousand.
- the "side chain component” refers to a component that is branched and bonded from a bond chain (that is, a main chain) that forms the skeleton of the molecular structure of a polymer.
- the orientation state of the side chain component (A) (that is, the orientation direction substantially orthogonal to the slow axis direction of the retardation film) must be strictly 90 degrees with respect to the polymer main chain. It is sufficient that there is a deviation ( ⁇ > a) that causes a difference between the polarizability ( ⁇ 1) parallel to the chopping main chain and the perpendicular polarization rate ( ⁇ 1).
- ⁇ polarizability
- the side chain component (A) is preferably a polycyclic aromatic ring or a polycyclic heterocycle.
- the polycyclic aromatic ring include a naphthalene skeleton, an anthracene skeleton, a fluorene skeleton, and a phenanthrene skeleton.
- Examples of the polycyclic heterocycle include an indole skeleton, a quinoline skeleton, a force rubazole skeleton, an atalidine skeleton, and the like.
- the side chain component (A) includes two or more aromatic rings, and more preferably includes a naphthalene skeleton or a fluorene skeleton.
- the absorption wavelength ( ⁇ ) of the side chain component (A) is polycyclic-cut-off
- V Decrease, reduce by force s.
- the side chain component (A) is a substituent represented by the following general formula (a) or (b) (hereinafter, represented by "general formula (a) or (b)”. Is sometimes abbreviated as “side chain substituent”.
- I ⁇ to R 15 are each independently a hydrogen atom, a halogen atom, a linear or branched alkyl group having 1 to 4 carbon atoms, or a carbon number of 1 -4 linear or branched halogenated alkyl groups, 1 to 4 carbon straight or branched alkoxy groups, carbon numbers;!
- linear or branched thioalkoxy groups linear or branched Branched alkoxycarbonyl group, substituted or unsubstituted aryl group, substituted or unsubstituted bur group, substituted or unsubstituted ethur group, acyloxy group, amino group, azido group, nitro group, cyano group, hydroxyl group Or a thiol group.
- R 1 is not a hydrogen atom.
- at least one substituent of R 8 to R 15 is not a hydrogen atom.
- R 1 in the above formula (a) and R 8 and / or R 9 in the formula (b) are a polycyclic aromatic ring to which the substituent (, R 8 , R 9 ) is bonded or Used to control the conformation of polycyclic heterocycles.
- the substituent represented by R 1 and R 8 and / or R 9 is substantially a side chain substituent with respect to the orientation direction of the main chain of the thermoplastic polymer due to steric hindrance. It is thought that they are oriented orthogonally.
- a retardation film showing excellent reverse wavelength dispersion characteristics can be obtained.
- any appropriate method can be adopted.
- the introduction method for example, (1) a polymer having a reactive site replaceable with the side chain substituent is polymerized in advance, and a compound having the side chain substituent at the reactive site of the polymer is obtained. And (2) a method of copolymerizing with other monomers using the monomer having the side chain substituent.
- the introduction method (1) for example, acetalization reaction, acetal exchange reaction, esterification reaction, etherification reaction, imidization reaction and the like are used.
- the introduction method (2) general radical polymerization, ionic polymerization, living polymerization and the like are used.
- the acetalization reaction and the acetal exchange reaction include a ketalization reaction and a ketal exchange reaction, respectively.
- the compound and monomer having a side chain substituent are 1 naphthalene derivative and fluorene derivative, respectively, and those suitable for the method of introduction into the polymer are appropriately selected.
- Examples of the compound and monomer include 1 naphthaldehyde, 1 naphthone, fluorenone, bisaminophenylfluorene, bisphenol fluorene, and derivatives thereof.
- the thermoplastic polymer has the side chain component (A)! /, A polymer having an appropriate structure can be appropriately employed.
- the bond of the main chain of the thermoplastic polymer is not particularly limited, and examples thereof include an acetal bond, a bond between carbon atoms, a carbonate bond, an amide bond, a urethane bond, an ether bond, and a siloxane bond.
- the bond is preferably an acetal bond, a bond between carbon atoms, or a carbonate bond.
- the thermoplastic polymer is preferably a buracetal polymer, an olefin polymer, or a carbonate polymer, and particularly preferably a buracetal polymer or an olefin polymer.
- the above-mentioned olefin-based polymer also includes cyclic olefin-based polymers (for example, ring-opening polymers such as norbornene dicyclopentagen, and hydrogenated products thereof) in addition to the force including linear olefins. .
- the thermoplastic polymer preferably contains 2 mol% to 40 mol%, more preferably 2 mol% to 30 mol%, particularly preferably 5 mol of the side chain component (A) per repeating unit. % To 20 mol%.
- a retardation film having excellent reverse wavelength dispersion characteristics can be obtained.
- the substituent represented by the general formula (a) or (b) is used as the side chain component (A)
- the content of the side chain component (A) can be reduced.
- the thermoplastic polymer has at least a repeating unit represented by the following general formula (I).
- This thermoplastic polymer has a naphthalene skeleton as the side chain component (A).
- the thermoplastic polymer can be obtained, for example, by subjecting an aldehyde compound and / or a ketone compound to a condensation reaction with a butyl alcohol polymer.
- the arrangement order of each basic unit of 1, m, and n may be any of alternating, random, or block without particular limitation.
- Such a thermoplastic polymer is excellent in solubility in a general-purpose solvent (eg, acetone, ethyl acetate, toluene, etc.) and exhibits a glass transition temperature excellent in operability such as stretching.
- 1 ⁇ to 17 are each independently a hydrogen atom, a halogen atom, a carbon number;! To a linear or branched alkyl group having 4 to 4 carbon atoms, 1 to 4 carbon atoms.
- Linear or branched halogenated alkyl group linear or branched alkoxy group having 1 to 4 carbon atoms, linear or branched thioalkoxy group having 1 to 4 carbon atoms, linear or branched alkoxy group
- Carbonyl group substituted or unsubstituted aryl group, substituted or unsubstituted vinyl group, substituted or unsubstituted ethyl group, acyloxy group, amino group, azido group, nitro group, cyano group, hydroxyl group, or thiol
- a 1 and A 2 are each independently a hydrogen atom, a straight chain or branched alkyl group having from 4 to 4 carbon atoms, or a substituent.
- a 3 is a hydrogen atom, a carbon 1 to 4 straight-chain or branched alkyl group, substituted or unsubstituted cycloalkyl group having 5 to 10 carbon atoms, substituted or unsubstituted aryl group, substituted or unsubstituted naphthyl group, or substituted or unsubstituted
- a 4 represents a heterocyclic group, and A 4 represents a hydrogen atom, a linear or branched aralkyl group having 1 to 4 carbon atoms, a benzyl group, a silyl group, a phosphate group, an acyl group, a benzoyl group, or a sulfonyl group. Represents.
- the basic unit 1 can be obtained, for example, by a condensation reaction between a vinyl alcohol polymer and 1-naphthaldehydes or 1_naphthones.
- 1-naphthaldehydes include 2-methoxy-1-mononaphthaldehyde, 2-ethoxy-1-naphthaldehyde, 2-propoxy-11-naphthaldehyde, 2_methyl-1-naphtholaldehyde, 2, 6 —Dimethyl-1-naphthaldehyde, 2,4-dimethyl-1-naphtholaldehyde, 2-hydroxy-1-naphthaldehyde, and the like.
- the 11-naphthones include 2-hydroxy-11-acetonaphthone, 8'-hydroxy-benzonaphthone, and the like. Of these, 1 naphthaldehydes are preferably 2
- the basic unit m can be obtained by a condensation reaction between a butyl alcohol polymer and an arbitrary aldehyde compound or ketone compound.
- Aldehyde compounds include formaldehyde, acetaldehyde, 1,1-diethoxyethane (acetal), propionaldehyde, n-butyraldehyde, isobutyraldehyde, cyclohexane carboxaldehyde, 5 norbornene-2 carboxaldehyde, 3 cyclohexane.
- Examples of the ketone compound include acetone, ethyl methyl ketone, jetyl ketone, methyl isobutyl ketone, dipropyl ketone, aryl ether ketone, acetophenone, p-methylacetophenone, 4 'aminoacetophenone, p-chloroacetophenone, 4 '-Methoxyacetophenone, 2, monohydroxyacetophenone, 3, mononitroacetophenone, p- (l-piperidino) acetophenone, benzanolasetophenone, propiopheenone, benzophenone, 4-nitroben Examples thereof include zophenone, 2-methylbenzophenone, p-bromobenzophenone, cyclohexyl (phenol) methanone, 2-butyronaphthone, and 1-acetonaphthone.
- a 4 is a protecting group (substituent) for adjusting the water absorption rate to an appropriate value by protecting the remaining hydroxyl group (also referred to as end cap treatment). .
- end cap treatment also referred to as end cap treatment.
- the hydroxyl group may not be end-capped (that is, A 4 is a hydrogen atom).
- a 4 is obtained by reacting with a hydroxyl group after obtaining a polymer having a hydroxyl group remaining.
- Any suitable group capable of introducing a substituent ie capable of being end-capped is used.
- This suitable group is also referred to as a protecting group.
- the protecting group include a benzyl group, 4-methoxyphenylmethyl group, methoxymethinole group, trimethylsilyl group, triethinoresininole group, t-butyldimethylsilyl group, acetyl group, benzoyl group, methanesulfonyl group, bis 4 -Nitrophenyl phosphite.
- a 4 is preferably a trimethylsilyl group, a triethylsilyl group, or a t-butyldimethylsilyl group.
- reaction conditions for the end cap treatment may be adopted depending on the type of the chloride of the substituent to be reacted with the hydroxyl group.
- reactions such as alkylation, benzylation, silylation, phosphorylation, and sulfonylation are carried out by using a polymer having a hydroxyl group remaining and a chloride of a desired substituent as a catalyst such as 4 (N, N dimethylamino) pyridine. In the presence of 25 ° C. to 100 ° C. for 1 to 20 hours with stirring.
- the ratio of 1, m and n can be appropriately set according to the purpose.
- the ratio of the basic unit 1 is preferably 2 mol% to 40 mol%, more preferably 2 mol% to 30 mol%, and particularly preferably 5 mol% to 20 mol%.
- the ratio of the basic unit m is preferably 20 mol 0 /. ⁇ A 80 mole 0/0, more preferably 3 0 mol% to 75 mol%, particularly preferably 40 mol% to 75 mol%.
- the ratio of the basic unit n is preferably 1 mol% to 60 mol%, more preferably 5 mol% to 50 mol%, particularly preferably 10 mol% to 45 mol%, and most preferably 10 mol%.
- phase difference film is a Norre% to 40 mol 0/0.
- l + m + n 100 mole 0/0.
- the ratio of basic units 1 and m; 1 / m (mol / mol) is preferably 0.05-0.40, more preferably 0.008-0. 35, particularly preferably from 0.10 to 0.30.
- thermoplastic polymer having at least a repeating unit represented by the general formula (I).
- (Rucetal polymer) is produced, for example, by a method comprising a step of dispersing a bull alcohol polymer and two or more aldehyde compounds and / or ketone compounds in a solvent and reacting them in the presence of an acid catalyst. it can. Two or more of the aldehyde compounds and / or ketone compounds may be reacted at the same time, or may be added one by one and reacted sequentially.
- This reaction is a condensation reaction with a butyl alcohol polymer and is also referred to as acetalization when an aldehyde compound is used (in this specification, ketalization using a ketone compound is also included in the broad definition of acetalization). ).
- the polymer may be a linear polymer or a branched polymer.
- the polymer may be a homopolymer or a copolymer polymerized from two or more unit monomers.
- a representative example of the copolymer is an ethylene-butyl alcohol copolymer.
- the bull alcohol-based polymer can be obtained, for example, by polymerizing a bull ester-based monomer to obtain a bull ester-based polymer, and then saponifying it to convert the bull ester unit into a vinyl alcohol unit. it can.
- the saponification degree of the above-mentioned butyl alcohol polymer is usually 70 mol% or more, preferably 80 mol% or more, particularly preferably 95 mol% or more.
- the saponification degree can be determined according to JIS K 6727 (1994). By setting the degree of saponification within the above range, a bulecetal polymer having a large phase difference can be obtained.
- Gohsenol series Names “NH—18, NH-300, A—300, C—50 0, GM—14 etc.), the company's Soanol series (product names“ D2908, DT2903, DC32 ”) 03 etc.)).
- the average degree of polymerization of the vinyl alcohol polymer can be set to any appropriate value.
- the average degree of polymerization is preferably 400 to 5000, more preferably 800 to 4000, and particularly preferably 800 to 3000.
- the average degree of polymerization of the butyl alcohol polymer can be measured by a method according to JIS K 6726 (1994).
- the solvent may be appropriately selected depending on the purpose.
- the solvent include alcohols such as methanol, ethanol, propanol, and butanol; cyclic ethers such as 1,4-dioxane; N, N-dimethylformaldehyde, N-methylolpyrrolidone, and dimethylsulfoxide.
- Aprotic solvents such as; and the like. These solvents are used alone or in combination of two or more. Moreover, you may mix and use water for the said solvent.
- the acid catalyst may be appropriately selected depending on the purpose.
- the acid catalyst include hydrochloric acid, sulfuric acid, phosphoric acid, p-toluenesulfonic acid, and the like.
- the acid catalyst is p-toluenesulfonic acid.
- the temperature at which the acid catalyst is reacted usually exceeds 0 ° C, and is less than the boiling point of the solvent used. Specifically, the temperature at which the acid catalyst is reacted is preferably 10 ° C. to: LOO ° C., more preferably 20 ° C. to 80 ° C.
- the reaction time is preferably 30 minutes to 20 hours, more preferably 1 hour to 10 hours.
- the cetacetal / ray ratio of the bullacetal polymer is preferably 40 mol 0 /. ⁇ 99 mole 0/0, more preferably 50 mol 0 /. ⁇ 95 mole 0/0, and particularly preferably from 60 mol% to 90 mol 0/0.
- the weight average molecular weight of the thermoplastic polymer is preferably 1,000,000, 000, 000, more preferably f, 3,000-500,000, and particularly preferably f 000 to 300, 00 0. By making the weight average molecular weight within the above range, it has excellent mechanical strength.
- Corrected paper (3 ⁇ 4 1 ⁇ 21 A phase difference film can be obtained.
- the weight average molecular weight is obtained directly by the method described in the examples.
- the glass transition temperature of the thermoplastic polymer is preferably from 100 ° C to 190 ° C, more preferably from 100 ° C to 170 ° C, and particularly preferably from 110 ° C to 150 ° C. ° C.
- the glass transition temperature can be determined by the DSC method according to JIS K 7121 (1987).
- the retardation film of the present invention may further contain any appropriate additive.
- the additive include plasticizers, heat stabilizers, light stabilizers, lubricants, antioxidants, ultraviolet absorbers, flame retardants, antistatic agents, compatibilizers, crosslinking agents, and thickeners. Can be mentioned.
- the amount of the additive used can be appropriately selected depending on the purpose. The amount of the additive used is preferably more than 0 and 30 (weight ratio) or less with respect to 100 parts by weight of the polymer.
- the thickness of the retardation film can be appropriately set to an appropriate value according to the purpose.
- the above thickness is preferably 10 ⁇ ⁇ ⁇ ⁇ 111 200 ⁇ 111, more preferably 20 ⁇ m to 100 ⁇ m, and particularly preferably 3011180111.
- the retardation film in the above thickness range has excellent mechanical strength and thickness uniformity!
- the water absorption of the retardation film is preferably 1% 8%, and more preferably 2% 7%. This is because, if the water absorption is approximately within this range, the adhesion of the retardation film is improved.
- the transmittance of the retardation film at a wavelength of 550 nm is preferably 85% or more.
- the absolute value (C [550] (m 2 / N)) of the photoelastic coefficient of the retardation film is preferably 1
- the in-plane birefringence index ( ⁇ [550]) of the retardation film at a wavelength of 550 nm is 0.0 01 or more force S is preferable, more preferably 0.0016 or more, still more preferably 0.0023 or more, and particularly preferably. 0025 or more, most preferably. 0030 or more.
- the birefringence is preferably 0.0070 or less, more preferably 0.0006 or less, particularly preferably 0.0053 or less, and most preferably 0.0005 or less. Since the conventional retardation film has poor expression of retardation due to stretching, there has been a problem that the film becomes thick when it is desired to obtain a desired retardation value.
- the retardation film of the present invention has excellent retardation and a large ⁇ . For this reason, a retardation film having a desired retardation value can be made thin.
- the in-plane retardation value (Re [550]) at a wavelength of 550 nm of the retardation film can be appropriately selected according to the purpose.
- Top ffiRe [550] is over lOrnn, preferably 50 ⁇ ! ⁇ 500 nm, more preferably 70 rnn ⁇ 400 nm.
- the retardation film is used as a ⁇ 2 plate.
- the above Re [550] is preferably 200 ⁇ ! ⁇ 400 ⁇ , more preferably 250nm ⁇ 350nm.
- the retardation film is used as an LZ4 plate.
- Re [550] is preferably 1 OO nm or more and less than 200 nm, and more preferably 120 nm to 180 nm.
- the in-plane retardation value (Re [450]) at a wavelength of 450 nm is smaller than the in-plane retardation value (Re [650]) at a wavelength of 650 nm.
- the retardation film satisfies Re [450] ⁇ Re [550] and Re [650] (that is, exhibits reverse wavelength dispersion characteristics).
- ⁇ Re is the lasing point when a retardation film with excellent uniformity is obtained.
- it is preferably 35 nm or less, and more preferably 25 nm or less.
- the rate (ReZ) is constant. For this reason, for example, the retardation film of the present invention is displayed on a liquid crystal display.
- Corrected paper (3 ⁇ 4 1 ⁇ 21 When used in a device, it can improve the phenomenon of light leakage depending on the viewing angle, and the phenomenon that the displayed image is bluish (both blue and blue phenomenon! /).
- the ratio of Re [450] to Re [550] (Re [450] ZRe [550]) of the above retardation film is preferably 0.95 or less, more preferably ⁇ 70—0. 90, particularly preferably 0.75 to 0.90, and most preferably 0.80-0.90.
- Re [450] ZRe [550] in the above range, for example, when the retardation film is used in a liquid crystal display device, even more excellent display characteristics can be obtained.
- Re [550]) is preferably 5 nm or more, more preferably lOnm or more, and particularly preferably l lnm or more.
- the above ARe provides a retardation film with excellent uniformity.
- it is preferably 35 mn or less, more preferably 25 nm or less.
- the ratio of Re [650] to Re [550] (Re [650] ZRe [550]) of the above retardation film is preferably 1.25 or more, more preferably 1. 03-1.20, particularly preferably f 1 ⁇ 04 to 1.20, and most preferably 1.05-1.20.
- Rth [550] of the retardation film an appropriate value can be appropriately selected according to the purpose.
- Rth [550] is lOnm or more, preferably 50 ⁇ ! ⁇ 500nm, more preferably 70 ⁇ ! ⁇ 400nm.
- the retardation film is used as a Z2 plate.
- the Rth [550] is preferably 200 nm to 400 nm, more preferably 250 ⁇ ! ⁇ 350nm.
- the retardation film is used as a 14 plate. In this case, Rth [550] above is preferred.
- Corrected paper (3 ⁇ 4 1 ⁇ 21 Or more than 100 and less than 200 stomachs, more preferably 120 to 180 stomachs.
- the retardation film of the present invention is obtained by molding a resin composition comprising the thermoplastic polymer or a resin composition containing the thermoplastic polymer into a sheet to obtain a polymer film. By stretching the polymer film, the main chain and side chain in the thermoplastic polymer are oriented.
- the polymer film can be obtained by any suitable forming method.
- the molding process include compression molding, transfer molding, injection molding, extrusion molding, blow molding, powder molding, FRP molding, and solvent casting.
- the molding method is a solvent casting method or an extrusion molding method.
- a concentrated solution (dope) obtained by dissolving a resin composition containing a thermoplastic polymer or additive as a main component in a solvent is degassed and then applied to the surface of an endless stainless steel belt or a rotating drum. It is a method of casting and evaporating the solvent to form a polymer film.
- a resin composition containing a thermoplastic polymer or additive as a main component is heated and melted, and this is extruded onto the surface of a casting roll using a T die or the like, and allowed to cool.
- This is a method of forming a polymer film.
- any appropriate stretching method may be employed depending on the purpose.
- the stretching method include a longitudinal uniaxial stretching method, a transverse uniaxial stretching method, a longitudinal and transverse simultaneous biaxial stretching method, and a longitudinal and transverse sequential biaxial stretching method.
- any appropriate stretching machine such as a roll stretching machine, a tenter stretching machine, and a biaxial stretching machine can be used.
- these stretching machines are provided with temperature control means.
- the internal temperature of the stretching machine may be continuously changed or may be changed stepwise.
- the stretching step may be performed once or divided into two or more times.
- the stretching direction may be the longitudinal direction (MD direction) of the film or the width direction (TD direction). Further, the film may be stretched in an oblique direction (obliquely stretched) using the stretching method described in FIG. 1 of Japanese Patent Application Publication No. 2003-262721.
- the temperature at which the polymer film is stretched can be appropriately set according to the purpose.
- the stretching is performed in the range of Tg + 1 ° C. to Tg + 30 ° C. with respect to the glass transition temperature (Tg) of the polymer film.
- Tg glass transition temperature
- the stretching temperature is preferably 100 ° C to 180 ° C, more preferably 120 ° C to 160 ° C.
- the glass transition temperature is the force S obtained by the DSC method according to JIS K 7121 (1987).
- any appropriate means can be adopted.
- the temperature control means include an air circulation type constant temperature oven in which hot air or cold air circulates; a heater using microwaves or far infrared rays; a roll heated for temperature adjustment, a heated heat pipe roll, Metal belts and the like.
- the magnification for stretching the polymer film can be appropriately selected according to the purpose.
- the draw ratio is preferably more than 1 and not more than 3 times, more preferably more than 1 and not more than 2.5 times, and particularly preferably 1.1 to 2.0 times.
- the feeding speed during stretching is not particularly limited, but is preferably 0.5 m / min to 30 m / min from the viewpoint of mechanical accuracy and stability. Under the above stretching conditions, not only the desired optical properties can be obtained, but also a retardation film having excellent uniformity can be obtained.
- the retardation film of the present invention can be used for any appropriate application.
- Typical applications include liquid crystal display device ⁇ / 4 plates, ⁇ / 2 plates, viewing angle widening films, and the like.
- Other examples include antireflection films for flat panel displays such as liquid crystal display devices, organic EL displays, and plasma displays.
- the optical layered body of the present invention includes the retardation film.
- the optical layered body further includes another retardation film in addition to the retardation film.
- the optical laminate further includes a polarizer in addition to the retardation film.
- FIG. 1 is a schematic cross-sectional view of an optical laminate according to a preferred embodiment of the present invention.
- An optical laminate 6 shown in FIG. 1A includes a retardation film 1, an adhesive layer 2, and another retardation film 3 in at least this order.
- An optical laminate 6 shown in FIG. 1B includes a retardation film 1, a polarizer 4, and a protective layer 5 at least in this order.
- the “adhesive layer” refers to a layer that joins the surfaces of adjacent optical members and integrates them with practically sufficient adhesive force and adhesion time.
- the material for forming the adhesive layer include an adhesive and an anchor coat agent.
- the adhesive layer may have a multilayer structure in which an anchor coat layer is formed on the surface of an adherend and an adhesive layer is formed thereon. Further, it may be a thin layer (also referred to as a hairline) that cannot be visually recognized.
- an appropriate adhesive or anchor coating agent can be appropriately selected according to the type and purpose of the adherend.
- Adhesives are classified according to their shapes, including solvent-based adhesives, emulsion-type adhesives, pressure-sensitive adhesives, rewet-adhesive adhesives, polycondensable adhesives, solvent-free adhesives, and film adhesives. And hot melt adhesives.
- Examples of adhesives include synthetic resin adhesives, rubber adhesives, and natural product adhesives according to chemical structure classification.
- the adhesive includes a viscoelastic substance (also called an adhesive! /) That exhibits an adhesive force that can be sensed by pressure contact at room temperature.
- Examples of the other retardation film include (1) a retardation film containing a cellulose-based polymer, a norbornene-based polymer, or a carbonate-based polymer, and (2) Japanese Patent Application Publication No. 7-146409.
- a solidified layer or a cured layer of a liquid crystalline composition containing a discotic liquid crystal compound as described in Japanese Patent Publication No. 2003-187623, as described in Japanese Patent Application Publication No. 2003-187623
- the other retardation film is not limited to the above example, and any appropriate film can be adopted.
- Any suitable polarizer may be adopted as long as it converts natural light or polarized light into linearly polarized light.
- the polarizer is preferably a stretched film mainly composed of a bull alcohol-based polymer containing iodine or a dichroic dye.
- the thickness of the polarizer is usually 5 111 to 50 111.
- the stretched film containing as a main component a vinyl alcohol polymer containing iodine or a dichroic dye can be obtained, for example, by the method of Example 1 of JP-A-2003-240952.
- the protective layer is used to prevent the polarizer from contracting or expanding.
- the protective layer is used to prevent the polarizer from being deteriorated by ultraviolet rays.
- the protective layer is preferably a polymer film containing a cellulosic polymer or a norbornene polymer.
- the thickness of the polymer film is usually from 10 111 to 200 111.
- the protective layer may also serve as a base film for a surface treatment layer described later.
- As the protective layer a commercially available polymer film can be used as it is. Alternatively, a commercially available polymer film can be used after being subjected to a surface treatment described later.
- the liquid crystal panel of the present invention includes the retardation film or the optical laminate.
- 2 and 3 are schematic cross-sectional views of a liquid crystal panel according to a preferred embodiment of the present invention.
- a liquid crystal panel 100 shown in FIG. 2 includes a liquid crystal cell 10, a first polarizer 21 (viewing side polarizer) disposed on one side of the liquid crystal cell 10, and the other side of the liquid crystal cell 10. At least the second polarizer 22 disposed and the phase difference film 1 disposed between the liquid crystal cell 10 and the first polarizer 21 are provided.
- the force S indicates that the retardation film 1 of the present invention is disposed only between the first polarizer 21 and the liquid crystal cell 10, and the retardation film 1 is One sheet may be disposed between the second polarizer 22 of the liquid crystal cell 10 and the liquid crystal cell 10.
- the retardation film 1 of the present invention may be disposed one by one between the first polarizer 21 and the liquid crystal cell 10 and between the second polarizer 22 and the liquid crystal cell 10. Furthermore, the number of retardation films is not limited to one, and a plurality of retardation films may be arranged.
- the liquid crystal cell 10 includes a pair of substrates 11 and 11 ′, and a liquid crystal layer 12 as a display medium held between the substrates 11 and 11 ′.
- One board 11 '(active The matrix substrate is provided with switching elements (typically TFTs) for controlling the electro-optical characteristics of the liquid crystal, and scanning lines for supplying gate signals to the active elements and signal lines for supplying source signals ( None of them are shown).
- the other substrate 11 (color filter substrate) is provided with a color filter.
- the color filter 1 may be provided on the active matrix substrate 11 ′. For example, when an RGB three-color light source is used as the illumination means of the liquid crystal display device (field sequential method, etc.), the above color filter can be omitted.
- a distance (cell gap) between the substrate 11 and the substrate 11 ′ is controlled by a spacer (not shown).
- a liquid crystal panel 101 shown in FIG. 3 is an example in which a reflective layer 23 is provided on the back side of the liquid crystal cell 10.
- Other configurations are the same as those described for the liquid crystal panel 100 of FIG.
- the liquid crystal display device of the present invention includes the liquid crystal panel.
- FIG. 4 is a schematic cross-sectional view of a liquid crystal display device according to a preferred embodiment of the present invention. For the sake of clarity, it should be noted that the ratio of the vertical, horizontal, and thickness of each component shown in Fig. 4 is different from the actual one.
- the liquid crystal display device 200 includes at least a liquid crystal panel 100 and a backlight unit 80 disposed on one side of the liquid crystal panel 100.
- a liquid crystal panel 100 and a backlight unit 80 disposed on one side of the liquid crystal panel 100.
- the direct type is adopted as the knock light unit is shown, but the liquid crystal display device of the present invention may be a side light type, for example.
- the backlight unit 80 preferably includes at least the light source 81, the reflection film 82, the diffusion plate 83, the prism sheet 84, and the brightness enhancement film 85.
- the knocklight unit further includes at least a light guide plate and a light reflector in addition to the above configuration.
- the optical member illustrated in FIG. 4 may be partially omitted depending on the illumination method of the liquid crystal display device, the driving mode of the liquid crystal cell, or the like as long as the effects of the present invention are obtained. Other optical members can be substituted.
- the liquid crystal display device may be a transmissive type that irradiates light from the back side of the liquid crystal panel and sees the screen, or irradiates light from the viewing side of the liquid crystal panel and sees the screen. It may be a type. Alternatively, the liquid crystal display device may be a transflective type having both transmissive and reflective properties.
- the liquid crystal display device of the present invention is used for any appropriate application.
- Applications include, for example, office equipment such as personal computer monitors, notebook computers, and copy machines, mobile phones, watches, digital cameras, personal digital assistants (PDAs), portable devices such as portable game machines, video cameras, televisions, and microwave ovens.
- Household electrical equipment such as, knock monitors, car navigation system monitors, in-vehicle equipment such as car audio, display equipment such as information monitors for commercial stores, security equipment such as monitoring monitors, nursing care monitors, medical care Nursing care, medical equipment, etc.
- the use of the liquid crystal display device of the present invention is a television.
- the screen size of the TV is preferably a wide 17 type (373 mm X 224 mm) or more, more preferably a wide 23 type (499 mm X 300 mm) or more, and particularly preferably a wide 32 type (687 mm X 41 2). mm) or more.
- Measurement was performed using “UV / Vis Spectrophotometer V-560” manufactured by JASCO.
- the UV-visible spectrum in the slow axis direction and the fast axis direction was measured to determine the wavelength at which the absorbance was 0.2, and this was taken as the absorption edge wavelength.
- Nuclear magnetic resonance spectrum meter [manufactured by JEOL Ltd., product name “LA400”] (measurement solvent: heavy DMSO, frequency: 400 MHz, observation nucleus: 1 H, measurement temperature: 70 ° C.) was used.
- Polystyrene was calculated as a standard sample by the gel permeation chromatography (GPC) method. Specifically, it measured with the following apparatuses, instruments, and measurement conditions.
- the sample used was a filtrate prepared by dissolving the sample in tetrahydrofuran to give a 0.1% by weight solution, leaving it to stand, and then filtering it through a 0.45 m membrane filter.
- the refractive index was obtained from the refractive index measured at 23 ° C. with a wavelength of 589 nm.
- the filtered polymer was dissolved in tetrahydrofuran and reprecipitated with methanol again. Filtration this? Drying gave 11.5 g of white polymer.
- the glass transition temperature of this polyvinyl acetal was measured and found to be 131 ° C.
- the glass transition temperature was measured at 123 ° C.
- the 2,7 jetirole 1,1-dimethoxyfluorene is a method according to Carbohydrate Research, (1987), 170, 124-135, using 2,7 jetulfluorene 9-one as a starting material. Synthesized according to 2,7 jetulfluorene 9-one was synthesized according to the method described in Journal of Organometallic Chemistry (1988), 556 (1-2), 219-228.
- thermoplastic polymer obtained in Production Example 1 in methyl ethyl ketone, apply it on a 70 m thick polyethylene terephthalate film (trade name “Lumirror S-27E” manufactured by Toray Industries, Inc.), and apply air. It dried with the circulation type drying oven. The dried coating film is peeled off from the polyethylene terephthalate film, and a transparent film having a thickness of 100 m is removed. A polymer film was obtained. This polymer film was stretched 1.5 times in a 135 ° C air circulating thermostat using a stretching machine to prepare retardation film A. The properties of the obtained retardation film A are shown in Table 1.
- thermoplastic polymer obtained in Production Example 2 a transparent polymer film having a thickness of 10 C ⁇ m was produced in the same manner as in Example 1.
- This polymer film was stretched 1.5 times in a 140 ° C. air circulating thermostat using a stretching machine to prepare retardation film B.
- the properties of the obtained retardation film B are shown in Table 1.
- the UV / Vis spectrum of this retardation film B was measured, it was found that the 2-methoxynaphthalene group bonded to the main chain was oriented substantially perpendicular to the slow axis direction. Further, the absorption edge wavelength ( ⁇ ) of the 2-methoxynaphthalene group was measured and found to be 352 nm (measurement results are shown in FIG. 6).
- thermoplastic polymer obtained in Production Example 4 a transparent polymer film having a thickness of 10 C ⁇ m was produced in the same manner as in Example 1.
- This polymer film was stretched 1.5 times in a 140 ° C. air circulating thermostat using a stretching machine to prepare retardation film C. Obtained
- the properties of the retardation film C are shown in Table 1.
- Component power, ivy. the absorption edge wavelength ( ⁇ ) of the 2,7-jetulfurolene group was measured and found to be 352 nm.
- thermoplastic polymer obtained in Production Example 3 Using the thermoplastic polymer obtained in Production Example 3, a transparent polymer film having a thickness of 10 C ⁇ m was produced in the same manner as in Example 1. This polymer film was stretched 1.5 times in a 145 ° C air circulating thermostat using a stretching machine to prepare a retardation film X. The properties of the obtained retardation film X are shown in Table 1. When the UV / Vis spectrum of this retardation film X was measured, the 2,4,6-trimethylphenyl group bonded to the main chain was oriented substantially perpendicular to the slow axis direction. That was a component. Further, the absorption edge wavelength ( ⁇ ) of this retardation film was measured and found to be 287 nm (measurement results are shown in FIG. 7).
- thermoplastic polymer obtained in Production Example 5 a transparent polymer film having a thickness of 10 C ⁇ m was produced in the same manner as in Example 1.
- This polymer film was stretched 1.5 times in a 142 ° C. air circulating thermostat using a stretching machine to prepare retardation film Y.
- the properties of the obtained retardation film Y are shown in Table 1.
- the UV / Vis spectrum of this retardation film Y was measured, it was found that the fluorene group bonded to the main chain was oriented substantially perpendicular to the slow axis direction. Further, the absorption edge wavelength ( ⁇ ) cut-off of the fluorene group was measured and found to be 323 nm (the measurement result is shown in FIG. 8).
- the in-plane retardation value (R e [450]) at a wavelength of 450 nm is smaller than the in-plane retardation value (Re [650]) at a wavelength of 650 nm. Shows reverse wavelength dispersion characteristics).
- the absorption edge wavelength ( ⁇ ) of the side chain component oriented substantially orthogonal to the slow axis direction is 330 nm or more.
- Such a retardation film has a large A Re and an in-plane ⁇ ⁇ [550]
- the retardation films of Examples 1 to 3 have both excellent reverse wavelength dispersion characteristics and excellent retardation characteristics.
- the phase difference between Comparative Examples 1 and 2 The film has an absorption edge wavelength ( ⁇ ) of the side chain component of less than 330 nm.
- the retardation film of the present invention exhibits excellent reverse wavelength dispersion characteristics, it is useful for improving display characteristics when used in, for example, a liquid crystal display device.
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Description
Claims
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CN2007800335179A CN101512402B (zh) | 2006-09-15 | 2007-09-05 | 相位差膜、光学层压体、液晶面板和液晶显示装置 |
KR1020087030577A KR101058971B1 (ko) | 2006-09-15 | 2007-09-05 | 위상차 필름, 광학 적층체, 액정 패널 및 액정 표시 장치 |
US12/373,999 US8911837B2 (en) | 2006-09-15 | 2007-09-05 | Retardation film, optical laminated body, liquid crystal panel, and liquid crystal display |
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US (1) | US8911837B2 (ja) |
JP (1) | JP5252611B2 (ja) |
KR (1) | KR101058971B1 (ja) |
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JP2012031332A (ja) * | 2010-08-02 | 2012-02-16 | Nippon Shokubai Co Ltd | 光学フィルムの製造方法 |
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KR101565320B1 (ko) * | 2012-12-13 | 2015-11-03 | 동우 화인켐 주식회사 | 위상차층, 편광판 및 이를 포함하는 편광판과 화상 표시 장치 |
KR102055004B1 (ko) * | 2012-12-21 | 2019-12-12 | 엘지디스플레이 주식회사 | 표시장치 및 그 제조방법 |
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WO2017180923A1 (en) * | 2016-04-13 | 2017-10-19 | Nitto Denko Corporation | Liquid crystal compositions, mixtures, elements, and dimmable devices |
KR101694257B1 (ko) * | 2016-06-20 | 2017-01-10 | 에스케이씨 주식회사 | 편광자 보호 필름, 이를 포함하는 편광판, 및 이를 구비한 표시 장치 |
CN112219143B (zh) * | 2018-03-02 | 2022-11-22 | 加里夏普创新有限责任公司 | 用于偏振基向量转换的延迟器堆栈对 |
JP7259232B2 (ja) * | 2018-08-31 | 2023-04-18 | 大日本印刷株式会社 | 表示パネル、画像表示装置及び表示パネルの紫外線吸収層の選別方法 |
KR102641067B1 (ko) * | 2019-08-21 | 2024-02-27 | 주식회사 엘지화학 | 편광판 |
CN113144916A (zh) * | 2021-05-31 | 2021-07-23 | 北京航空航天大学 | 一种三维网络多孔膜的制备方法与应用 |
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JP2002221622A (ja) * | 2000-11-22 | 2002-08-09 | Teijin Ltd | 広視野角偏光フィルムおよびその製造方法 |
JP2004272109A (ja) * | 2003-03-11 | 2004-09-30 | Nippon Oil Corp | 光学フィルムおよび液晶表示素子 |
JP2006220726A (ja) * | 2005-02-08 | 2006-08-24 | Nitto Denko Corp | 位相差フィルム、偏光素子、液晶パネルおよび液晶表示装置 |
JP2006234878A (ja) * | 2005-02-22 | 2006-09-07 | Nitto Denko Corp | 位相差フィルムの製造方法 |
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WO2013137113A1 (ja) * | 2012-03-15 | 2013-09-19 | 日本ゼオン株式会社 | 有機el表示装置 |
CN104169754A (zh) * | 2012-03-15 | 2014-11-26 | 日本瑞翁株式会社 | 有机el显示装置 |
US9048457B2 (en) | 2012-03-15 | 2015-06-02 | Zeon Corporation | Organic EL display device |
JPWO2013137113A1 (ja) * | 2012-03-15 | 2015-08-03 | 日本ゼオン株式会社 | 有機el表示装置 |
US20150219816A1 (en) | 2012-03-15 | 2015-08-06 | Zeon Corporation | Organic el display device |
US9285525B2 (en) | 2012-03-15 | 2016-03-15 | Zeon Corporation | Organic EL display device |
TWI685682B (zh) * | 2017-09-26 | 2020-02-21 | 南韓商Lg化學股份有限公司 | 光學膜、光學元件及成像裝置 |
US11366259B2 (en) | 2017-09-26 | 2022-06-21 | Lg Chem, Ltd. | Optical film, optical element, and imaging device |
Also Published As
Publication number | Publication date |
---|---|
KR20090050026A (ko) | 2009-05-19 |
US20090167999A1 (en) | 2009-07-02 |
US8911837B2 (en) | 2014-12-16 |
CN101512402A (zh) | 2009-08-19 |
TWI378302B (ja) | 2012-12-01 |
CN101512402B (zh) | 2012-04-04 |
TW200819873A (en) | 2008-05-01 |
KR101058971B1 (ko) | 2011-08-23 |
JP2008070742A (ja) | 2008-03-27 |
JP5252611B2 (ja) | 2013-07-31 |
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