KR102031800B1 - Light guide film, back light unit and liquid crystal display apparatus comprising the same - Google Patents
Light guide film, back light unit and liquid crystal display apparatus comprising the sameInfo
- Publication number
- KR102031800B1 KR102031800B1 KR1020180063636A KR20180063636A KR102031800B1 KR 102031800 B1 KR102031800 B1 KR 102031800B1 KR 1020180063636 A KR1020180063636 A KR 1020180063636A KR 20180063636 A KR20180063636 A KR 20180063636A KR 102031800 B1 KR102031800 B1 KR 102031800B1
- Authority
- KR
- South Korea
- Prior art keywords
- meth
- acrylate
- light guide
- optical pattern
- layer
- Prior art date
Links
- 239000004973 liquid crystal related substance Substances 0.000 title claims description 19
- -1 acrylic ester Chemical class 0.000 claims abstract description 47
- 239000000178 monomer Substances 0.000 claims abstract description 43
- 230000003287 optical effect Effects 0.000 claims abstract description 37
- 239000000203 mixture Substances 0.000 claims abstract description 25
- 239000003431 cross linking reagent Substances 0.000 claims abstract description 19
- NOWKCMXCCJGMRR-UHFFFAOYSA-N Aziridine Chemical compound C1CN1 NOWKCMXCCJGMRR-UHFFFAOYSA-N 0.000 claims abstract description 16
- 229920006243 acrylic copolymer Polymers 0.000 claims abstract description 13
- 238000000034 method Methods 0.000 claims description 7
- 238000004049 embossing Methods 0.000 claims description 2
- 239000000758 substrate Substances 0.000 abstract description 17
- 230000002708 enhancing effect Effects 0.000 abstract description 3
- 229940048053 acrylate Drugs 0.000 description 93
- NIXOWILDQLNWCW-UHFFFAOYSA-M Acrylate Chemical compound [O-]C(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 description 88
- 239000010410 layer Substances 0.000 description 53
- 239000010408 film Substances 0.000 description 45
- 230000008901 benefit Effects 0.000 description 11
- 238000011156 evaluation Methods 0.000 description 9
- HRPVXLWXLXDGHG-UHFFFAOYSA-N Acrylamide Chemical compound NC(=O)C=C HRPVXLWXLXDGHG-UHFFFAOYSA-N 0.000 description 7
- 210000004027 cell Anatomy 0.000 description 7
- 230000000052 comparative effect Effects 0.000 description 7
- 230000008859 change Effects 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 6
- OMIGHNLMNHATMP-UHFFFAOYSA-N 2-hydroxyethyl prop-2-enoate Chemical compound OCCOC(=O)C=C OMIGHNLMNHATMP-UHFFFAOYSA-N 0.000 description 5
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- 125000004432 carbon atom Chemical group C* 0.000 description 5
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- 239000012956 1-hydroxycyclohexylphenyl-ketone Substances 0.000 description 4
- FIHBHSQYSYVZQE-UHFFFAOYSA-N 6-prop-2-enoyloxyhexyl prop-2-enoate Chemical compound C=CC(=O)OCCCCCCOC(=O)C=C FIHBHSQYSYVZQE-UHFFFAOYSA-N 0.000 description 4
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- VVQNEPGJFQJSBK-UHFFFAOYSA-N Methyl methacrylate Chemical compound COC(=O)C(C)=C VVQNEPGJFQJSBK-UHFFFAOYSA-N 0.000 description 4
- 239000007983 Tris buffer Substances 0.000 description 4
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- 238000002360 preparation method Methods 0.000 description 4
- FALRKNHUBBKYCC-UHFFFAOYSA-N 2-(chloromethyl)pyridine-3-carbonitrile Chemical group ClCC1=NC=CC=C1C#N FALRKNHUBBKYCC-UHFFFAOYSA-N 0.000 description 3
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 3
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- MQDJYUACMFCOFT-UHFFFAOYSA-N bis[2-(1-hydroxycyclohexyl)phenyl]methanone Chemical compound C=1C=CC=C(C(=O)C=2C(=CC=CC=2)C2(O)CCCCC2)C=1C1(O)CCCCC1 MQDJYUACMFCOFT-UHFFFAOYSA-N 0.000 description 3
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- 125000000524 functional group Chemical group 0.000 description 3
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- LXRYXHPECAPIQA-UHFFFAOYSA-N 1-benzylsulfonylaziridine Chemical compound C1CN1S(=O)(=O)CC1=CC=CC=C1 LXRYXHPECAPIQA-UHFFFAOYSA-N 0.000 description 2
- KWVGIHKZDCUPEU-UHFFFAOYSA-N 2,2-dimethoxy-2-phenylacetophenone Chemical compound C=1C=CC=CC=1C(OC)(OC)C(=O)C1=CC=CC=C1 KWVGIHKZDCUPEU-UHFFFAOYSA-N 0.000 description 2
- XMLYCEVDHLAQEL-UHFFFAOYSA-N 2-hydroxy-2-methyl-1-phenylpropan-1-one Chemical compound CC(C)(O)C(=O)C1=CC=CC=C1 XMLYCEVDHLAQEL-UHFFFAOYSA-N 0.000 description 2
- 125000000954 2-hydroxyethyl group Chemical group [H]C([*])([H])C([H])([H])O[H] 0.000 description 2
- NJWGQARXZDRHCD-UHFFFAOYSA-N 2-methylanthraquinone Chemical compound C1=CC=C2C(=O)C3=CC(C)=CC=C3C(=O)C2=C1 NJWGQARXZDRHCD-UHFFFAOYSA-N 0.000 description 2
- HMBNQNDUEFFFNZ-UHFFFAOYSA-N 4-ethenoxybutan-1-ol Chemical compound OCCCCOC=C HMBNQNDUEFFFNZ-UHFFFAOYSA-N 0.000 description 2
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- UJOBWOGCFQCDNV-UHFFFAOYSA-N 9H-carbazole Chemical compound C1=CC=C2C3=CC=CC=C3NC2=C1 UJOBWOGCFQCDNV-UHFFFAOYSA-N 0.000 description 2
- KWOLFJPFCHCOCG-UHFFFAOYSA-N Acetophenone Chemical compound CC(=O)C1=CC=CC=C1 KWOLFJPFCHCOCG-UHFFFAOYSA-N 0.000 description 2
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- VZCYOOQTPOCHFL-OWOJBTEDSA-N Fumaric acid Chemical compound OC(=O)\C=C\C(O)=O VZCYOOQTPOCHFL-OWOJBTEDSA-N 0.000 description 2
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- 239000004695 Polyether sulfone Substances 0.000 description 2
- 239000004793 Polystyrene Substances 0.000 description 2
- 239000004820 Pressure-sensitive adhesive Substances 0.000 description 2
- WYURNTSHIVDZCO-UHFFFAOYSA-N Tetrahydrofuran Chemical compound C1CCOC1 WYURNTSHIVDZCO-UHFFFAOYSA-N 0.000 description 2
- NNLVGZFZQQXQNW-ADJNRHBOSA-N [(2r,3r,4s,5r,6s)-4,5-diacetyloxy-3-[(2s,3r,4s,5r,6r)-3,4,5-triacetyloxy-6-(acetyloxymethyl)oxan-2-yl]oxy-6-[(2r,3r,4s,5r,6s)-4,5,6-triacetyloxy-2-(acetyloxymethyl)oxan-3-yl]oxyoxan-2-yl]methyl acetate Chemical compound O([C@@H]1O[C@@H]([C@H]([C@H](OC(C)=O)[C@H]1OC(C)=O)O[C@H]1[C@@H]([C@@H](OC(C)=O)[C@H](OC(C)=O)[C@@H](COC(C)=O)O1)OC(C)=O)COC(=O)C)[C@@H]1[C@@H](COC(C)=O)O[C@@H](OC(C)=O)[C@H](OC(C)=O)[C@H]1OC(C)=O NNLVGZFZQQXQNW-ADJNRHBOSA-N 0.000 description 2
- 229940114077 acrylic acid Drugs 0.000 description 2
- 125000003368 amide group Chemical group 0.000 description 2
- ISAOCJYIOMOJEB-UHFFFAOYSA-N benzoin Chemical compound C=1C=CC=CC=1C(O)C(=O)C1=CC=CC=C1 ISAOCJYIOMOJEB-UHFFFAOYSA-N 0.000 description 2
- RWCCWEUUXYIKHB-UHFFFAOYSA-N benzophenone Chemical compound C=1C=CC=CC=1C(=O)C1=CC=CC=C1 RWCCWEUUXYIKHB-UHFFFAOYSA-N 0.000 description 2
- 125000001797 benzyl group Chemical group [H]C1=C([H])C([H])=C(C([H])=C1[H])C([H])([H])* 0.000 description 2
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Classifications
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- G—PHYSICS
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- G02B5/02—Diffusing elements; Afocal elements
- G02B5/0205—Diffusing elements; Afocal elements characterised by the diffusing properties
- G02B5/021—Diffusing elements; Afocal elements characterised by the diffusing properties the diffusion taking place at the element's surface, e.g. by means of surface roughening or microprismatic structures
- G02B5/0231—Diffusing elements; Afocal elements characterised by the diffusing properties the diffusion taking place at the element's surface, e.g. by means of surface roughening or microprismatic structures the surface having microprismatic or micropyramidal shape
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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
- C08F2/00—Processes of polymerisation
- C08F2/46—Polymerisation initiated by wave energy or particle radiation
- C08F2/48—Polymerisation initiated by wave energy or particle radiation by ultraviolet or visible light
- C08F2/50—Polymerisation initiated by wave energy or particle radiation by ultraviolet or visible light with sensitising agents
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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
- C08F265/00—Macromolecular compounds obtained by polymerising monomers on to polymers of unsaturated monocarboxylic acids or derivatives thereof as defined in group C08F20/00
- C08F265/02—Macromolecular compounds obtained by polymerising monomers on to polymers of unsaturated monocarboxylic acids or derivatives thereof as defined in group C08F20/00 on to polymers of acids, salts or anhydrides
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D133/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Coating compositions based on derivatives of such polymers
- C09D133/04—Homopolymers or copolymers of esters
- C09D133/06—Homopolymers or copolymers of esters of esters containing only carbon, hydrogen and oxygen, the oxygen atom being present only as part of the carboxyl radical
- C09D133/08—Homopolymers or copolymers of acrylic acid esters
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D133/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Coating compositions based on derivatives of such polymers
- C09D133/04—Homopolymers or copolymers of esters
- C09D133/06—Homopolymers or copolymers of esters of esters containing only carbon, hydrogen and oxygen, the oxygen atom being present only as part of the carboxyl radical
- C09D133/10—Homopolymers or copolymers of methacrylic acid esters
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/63—Additives non-macromolecular organic
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- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
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- G02B5/02—Diffusing elements; Afocal elements
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0033—Means for improving the coupling-out of light from the light guide
- G02B6/005—Means for improving the coupling-out of light from the light guide provided by one optical element, or plurality thereof, placed on the light output side of the light guide
- G02B6/0053—Prismatic sheet or layer; Brightness enhancement element, sheet or layer
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- 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
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- G—PHYSICS
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- 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
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Abstract
Description
본 발명은 도광필름, 이를 포함하는 백라이트 유닛 및 액정표시장치에 관한 것이다.The present invention relates to a light guide film, a backlight unit including the same, and a liquid crystal display device.
백라이트는 액정표시장치, 각종 전자기기의 키패드(KEY PAD) 등에 적용되어 면광원을 형성하는 조명이다. 이와 같은 조명을 구현하기 위해 빛을 공급하고 확산하여 면광원을 형성하는 어셈블리 형태를 백라이트 유닛(Backlight Unit)이라 한다. The backlight is applied to a liquid crystal display, a keypad of various electronic devices, and the like to form a surface light source. An assembly type for supplying and diffusing light to form a surface light source to implement such lighting is called a backlight unit.
상기 액정표시장치는 현재 국내외 디스플레이 시장에서 가장 점유율이 높은 장치로, 박형의 벽걸이 텔레비전, 노트북 컴퓨터의 모니터, 데스크탑 컴퓨터의 모니터, 항법장치, PDA, 휴대폰, 게임기에 이르기까지 다양한 장치에 적용되고 있는실정이다. 이 때, 상기 액정표시장치의 경우, 액정은 외부의 전기, 전자 신호에 의해 특정한 형태로 배열되어 디스플레이되는 화상을 형성하지만, 자체적인 발광기능이 없기 때문에 화상을 사용자의 육안으로 관찰하기 위해서는 후방에서 발광되는 면 발광수단인 백라이트 유닛이 요구된다.The liquid crystal display device is currently the largest market share in the domestic and overseas display market, and is applied to a variety of devices ranging from thin wall-mounted televisions, monitors of notebook computers, monitors of desktop computers, navigation devices, PDAs, mobile phones, and game machines. to be. At this time, in the liquid crystal display device, the liquid crystal is arranged in a specific form by an external electric and electronic signal to form an image to be displayed, but since the liquid crystal does not have its own light emitting function, the liquid crystal display may be rearward to observe the image with the naked eye of the user. There is a need for a backlight unit which is surface emitting means for emitting light.
또한, 상기 키패드 역시 야간 또는 어두운 실내에서 키패드의 각 기능버튼을 손쉽게 인지하기 위해서는 버튼의 후방에서 발광되는 백라이트 유닛이 요구된다. In addition, the keypad also requires a backlight unit that emits light from the rear of the button in order to easily recognize each function button of the keypad in a night or a dark room.
상기와 같은 백라이트 유닛은 면 발광되기 위해 대체로 사각의 플레이트 형태로 형성된 도광판과 도광판의 어느 일측 또는 여러측에서 빛을 공급하는 광원으로 구성된다. 여기서, 상기 도광판은 적어도 어느 일 측면에서 공급되는 빛을 수광하여 전체 면으로 확산시킨 후 면발광되기 위해 일면은 수광된 빛을 출사하는 출사면으로 형성되고, 출사면의 이면에는 수광된 빛 중 출사면과 상이한 방향으로 출사되는 빛을 반사시켜 출사면으로 진행시키는 반사면이 형성된다. 특히, 상기 반사면에는 보다 높은 반사효율을 얻기 위해 빛의 반사율이 우수한 별도의 반사시트가 부착된다. Such a backlight unit includes a light guide plate formed in a generally rectangular plate shape and a light source for supplying light from one side or multiple sides of the light guide plate to be surface-emitted. Here, the light guide plate is formed of an emission surface for receiving the light supplied from at least one side to diffuse to the entire surface after the light is emitted to one side, the light emitting surface, the light emitting plate is emitted from the received light A reflective surface is formed which reflects the light emitted in a direction different from the surface and proceeds to the exit surface. In particular, a separate reflection sheet having excellent reflectance of light is attached to the reflective surface to obtain higher reflection efficiency.
최근 이러한 백라이트 유닛의 경우 디스플레이의 박형화로 인해 보다 박막화 될 것이 요구되고 있어 도광판을 필름의 형태로 제조되는 방안이 제안되고 있을 뿐만 아니라, 이와 같이 필름의 형태로 제조될 경우 발생할 수 있는 밀착력 등의 내구성 저하를 방지하는 기술의 개발이 필요한 실정이다.Recently, such a backlight unit is required to be thinner due to the thinning of the display. Therefore, a method of manufacturing the light guide plate in the form of a film has been proposed, as well as durability such as adhesion that may occur when the film is manufactured in the form of a film. There is a need for development of a technology for preventing degradation.
이와 관련하여, 대한민국 등록특허 제10-0829240호에는 일측에 광원이 결합되어 광원에서 공급된 빛을 수광하여 면 발광되기 위해 일면은 빛의 출사면으로 형성되고, 타면은 빛의 반사면으로 형성된 도광판에 있어서, 올리고머, 모노머, 광개시제가 혼합된 UV레진이 박판 형태로 형성되어 UV 코팅 레이어로 형성되고, 상기 UV 코팅 레이어에는 광원에서 공급된 빛의 반사량이 광원과의 거리에 따라 변화되는 반사패턴이 형성된 박막형 백라이트용 도광판에 대하여 기재되어 있으나, 이는 도광판의 도포를 위해 일반적으로 사용되는 공법인 롤투롤 공정(roll-to-roll processing)의 적용이 불가하여 생산 효율이 저하되는 문제가 있다. In this regard, Korean Patent No. 10-0829240 has a light source coupled to one side to receive the light supplied from the light source so that one surface is formed as an emission surface of the light, the other surface is a light guide plate formed of the light reflection surface In the UV resin in which the oligomer, monomer, and photoinitiator are mixed to form a thin plate, and formed into a UV coating layer, the UV coating layer has a reflection pattern in which the amount of reflection of light supplied from the light source is changed according to the distance from the light source. Although it has been described with respect to the formed light guide plate for a thin film type backlight, it is not possible to apply the roll-to-roll processing, which is a commonly used method for coating the light guide plate, and thus there is a problem in that the production efficiency is lowered.
또한, 대한민국 공개특허 제10-2016-0085933호에는 기재층; 상기 기재층 상에 형성되는 광학패턴층, 및 상기 기재층과 광학패턴층의 사이에 형성되는 부착력 증진층을 포함하고, △Haze 값이 0.3 이하인 도광필름에 대하여 기재되어 있으나, 이는 부착력 향상을 위해 부착력 증진층이 별도로 포함됨으로써 박막화가 어렵고 제조단가가 상승하는 문제가 있다. In addition, Korean Patent Laid-Open No. 10-2016-0085933 discloses a substrate layer; It includes an optical pattern layer formed on the base layer, and an adhesion force enhancing layer formed between the base layer and the optical pattern layer, and described for a light guide film having a ΔHaze value of 0.3 or less, but to improve the adhesion Since the adhesion force enhancement layer is separately included, there is a problem in that the thinning is difficult and the manufacturing cost is increased.
본 발명은 상기와 같은 문제를 해결하기 위한 것으로서, 별도의 밀착력 증진층 없이도 밀착성이 우수하여 내구성이 향상된 도광필름, 이를 포함하는 백라이트 유닛 및 액정표시장치를 제공하는 것을 그 목적으로 한다. The present invention is to solve the above problems, it is an object of the present invention to provide a light guide film, a backlight unit and a liquid crystal display device having improved durability with excellent adhesion without a separate adhesion force enhancement layer.
상기 목적을 달성하기 위한 본 발명의 도광필름은 기재층; 상기 기재층의 적어도 일 면 상에 광학패턴층;을 포함하고, 상기 광학패턴층은 각각 1종 이상의 (메트)아크릴계 공중합체, (메트)아크릴계 에스테르 모노머 및 아지리딘 가교제를 함유하는 조성물의 경화물을 포함하는 것을 특징으로 한다.The light guide film of the present invention for achieving the above object is a base layer; An optical pattern layer on at least one surface of the base layer; wherein the optical pattern layer is a cured product of a composition containing at least one (meth) acrylic copolymer, a (meth) acrylic ester monomer, and an aziridine crosslinking agent, respectively. Characterized in that it comprises a.
또한, 본 발명에 따른 백라이트 유닛은 전술한 도광필름; 및 상기 도광필름의 적어도 일 면 상에 배치되고 역프리즘이 형성된 집광시트;를 포함하는 것을 특징으로 한다.In addition, the backlight unit according to the present invention includes the above-described light guide film; And a light collecting sheet disposed on at least one surface of the light guide film and having a reverse prism formed thereon.
또한, 본 발명에 따른 액정표시장치는 전술한 백라이트 유닛을 포함하는 것을 특징으로 한다. In addition, the liquid crystal display according to the invention is characterized in that it comprises the above-mentioned backlight unit.
본 발명의 도광필름은 별도의 밀착력 증진층 없이도 밀착성이 우수하여 내구성이 향상되고, 내열 및 내습열 상황에서도 색상 변화값을 최소화할 수 있으며, 그로 인해 백라이트 유닛을 박형화할 수 있을 뿐만 아니라, 제조단가를 절감할 수 있는 이점이 있다. The light guiding film of the present invention has excellent adhesion even without a separate adhesion enhancement layer, thereby improving durability, minimizing color change in heat and moisture resistant conditions, and thus, not only thinning the backlight unit but also manufacturing cost There is an advantage to reduce the cost.
본 발명의 백라이트 유닛은 전술한 도광필름을 포함함으로써, 내구성이 우수하고 내열 및 내습열 상황에서의 색상변화가 최소화되며 박형화된 이점이 있다. Since the backlight unit of the present invention includes the light guide film described above, the durability of the backlight unit is excellent, the color change in the heat and moisture resistant conditions is minimized, and there is an advantage in thickness reduction.
본 발명의 액정표시장치는 전술한 백라이트 유닛을 포함함으로써, 전술한 바와 동일한 이점이 있다.The liquid crystal display of the present invention has the same advantages as described above by including the above-described backlight unit.
도 1은 본 발명의 도광필름을 도시한 도이다.1 is a view showing a light guide film of the present invention.
본 발명에서 어떤 부재가 다른 부재 "상에" 위치하고 있다고 할 때, 이는 어떤 부재가 다른 부재에 직접 접해 있는 경우뿐 아니라 두 부재 사이에 또 다른 부재가 개재되어 있는 경우도 포함한다. In the present invention, when a member is located "on" another member, this includes not only when a member is directly in contact with another member but also when another member is interposed between the two members.
본 발명에서 어떤 부분이 어떤 구성요소를 "포함"한다고 할 때, 이는 특별히 반대되는 기재가 없는 한 다른 구성요소를 제외하는 것이 아니라 다른 구성요소를 더 포함할 수 있는 것을 의미한다. In the present invention, when a part is said to "include" a certain component, it means that it may further include other components, without excluding the other components unless otherwise stated.
본 명세서에서 "(메트)아크릴"은 "아크릴" 및/또는 "메트아크릴"을 의미할 수 있다.As used herein, "(meth) acryl" may mean "acryl" and / or "methacryl".
이하, 본 발명에 대하여 더욱 상세히 설명한다.Hereinafter, the present invention will be described in more detail.
본 발명의 한 양태에 따른 도광필름(100)은 기재층(101); 상기 기재층(101)의 적어도 일 면 상에 광학패턴층(102);을 포함하고, 상기 광학패턴층(102)은 각각 1종 이상의 (메트)아크릴계 공중합체, (메트)아크릴계 에스테르 모노머 및 아지리딘 가교제를 함유하는 조성물의 경화물을 포함함으로써, 별도의 밀착력 증진층 없이도 밀착성이 우수하여 내구성이 향상되고, 내열 및 내습열 상황에서 필름의 색상변화를 최소화할 수 있으며, 그로 인해 백라이트 유닛을 박형화할 수 있을 뿐만 아니라, 제조단가를 절감할 수 있는 이점이 있다.The light guide film 100 according to an aspect of the present invention includes a base layer 101; An optical pattern layer 102 on at least one surface of the base layer 101, wherein the optical pattern layer 102 each includes one or more (meth) acrylic copolymers, (meth) acrylic ester monomers, and aziri. By including the cured product of the composition containing the dean crosslinking agent, the adhesion is excellent even without a separate adhesion promoting layer to improve the durability, it is possible to minimize the color change of the film in the heat and moisture resistant conditions, thereby thinning the backlight unit Not only can it, there is an advantage that can reduce the manufacturing cost.
도광필름Light guide film (100)(100)
본 발명의 한 양태에 따른 도광필름(100)은 기재층(101)을 포함한다.The light guide film 100 according to an aspect of the present invention includes a base layer 101.
상기 기재층(101)은 광학패턴층(102)을 지지하고, 광원으로부터 입사된 광을 인도하여 광이 도광필름(100)을 통해 출사될 수 있도록 하는 역할을 한다. The base layer 101 supports the optical pattern layer 102 and guides the light incident from the light source so that the light can be emitted through the light guide film 100.
상기 기재층(101)의 굴절률은 광학패턴층(102)과 동일 또는 보다 큰 굴절률을 가질 수 있으며, 이로 인해 광원에서 입사된 광이 도광필름(100) 내에서만 반사되어 출사되지 못하게 함으로써 광 효율 저하를 방지할 수 있다. 본 발명의 일 실시형태에 따르면, 기재층(101)과 광학패턴층(102)의 굴절률 차이는 0.02 이하일 수 있다. 상기 범위 내에서 광의 출사율을 높여 휘도 감소를 방지할 수 있는 이점이 있다. The refractive index of the base layer 101 may have a refractive index equal to or greater than that of the optical pattern layer 102, thereby reducing light efficiency by preventing light incident from a light source from being reflected by only the light guide film 100. Can be prevented. According to one embodiment of the present invention, the difference in refractive index between the base layer 101 and the optical pattern layer 102 may be 0.02 or less. There is an advantage that can increase the emission rate of the light within the above range to prevent the reduction of the brightness.
상기 기재층(101)은 당 업계에서 기재로서 사용되는 것이라면 특별한 제한 없이 적용 가능하지만, 가격이 저렴하면서 광투과성이 높고, 내구성이 우수한 수지를 사용하는 것이 바람직한데, 예를 들면, 투명기재는 노르보르넨이나 다환 노르보르넨계 단량체와 같은 시클로올레핀을 포함하는 단량체의 단위를 갖는 시클로올레핀계 유도체들, 셀룰로오스(디아세틸셀룰로오스, 트리아세틸셀룰로오스, 아세틸셀룰로오스부틸레이트, 이소부틸에스테르셀룰로오스, 프로피오닐셀룰로오스, 부티릴셀룰로오스, 아세틸프로피오닐셀룰로오스), 에틸렌-아세트산비닐공중합체, 폴리에스테르, 폴리스티렌, 폴리아미드, 폴리에테르이미드, 폴리아크릴, 폴리이미드, 폴리에테르술폰, 폴리술폰, 폴리에틸렌, 폴리프로필렌, 폴리메틸펜텐, 폴리염화비닐, 폴리염화비닐리덴, 폴리비닐알콜, 폴리비닐아세탈, 폴리에테르케톤, 폴리에테르에테르케톤, 폴리에테르술폰, 폴리메틸메타아크릴레이트, 폴리에틸렌테레프탈레이트, 폴리부틸렌테레프탈레이트, 폴리에틸렌나프탈레이트, 폴리카보네이트, 폴리우레탄, 에폭시 중에서 선택된 것을 사용할 수 있으며, 미연신, 1축 또는 2축 연신 필름을 사용할 수 있다. 바람직하게는 투명성 및 내열성이 우수한 1축 또는 2축 연신 폴리에스테르 필름이나, 투명성 및 광학적으로 이방성이 없는 트리아세틸셀룰로오스 필름이 사용될 수 있다. The substrate layer 101 may be applied without particular limitation as long as it is used as a substrate in the art, but it is preferable to use a resin having a low cost, high light transmittance, and excellent durability, for example, a transparent substrate is Cycloolefin derivatives having units of monomers containing cycloolefins, such as bornen or polycyclic norbornene monomers, cellulose (diacetyl cellulose, triacetyl cellulose, acetyl cellulose butyrate, isobutyl ester cellulose, propionyl cellulose, Butyryl cellulose, acetylpropionyl cellulose), ethylene-vinyl acetate copolymer, polyester, polystyrene, polyamide, polyetherimide, polyacryl, polyimide, polyethersulfone, polysulfone, polyethylene, polypropylene, polymethylpentene , Polyvinyl chloride, polyvinyl chloride Polyvinyl alcohol, polyvinyl acetal, polyether ketone, polyether ether ketone, polyether sulfone, polymethyl methacrylate, polyethylene terephthalate, polybutylene terephthalate, polyethylene naphthalate, polycarbonate, polyurethane, epoxy Any one can be used, and an unstretched, uniaxial or biaxially stretched film can be used. Preferably, a uniaxial or biaxially stretched polyester film having excellent transparency and heat resistance, but a triacetylcellulose film having no transparency and optically anisotropy may be used.
또한, 아크릴계 수지를 사용할 수도 있는데, 예를 들면 메틸(메트)아크릴레이트, 에틸(메트)아크릴레이트, 부틸(메트)아크릴레이트, 2-에틸헥실(메트)아크릴레이트 등의 (메트)아크릴산알킬에스테르; 메틸아크릴레이트, 에틸아크릴레이트, 부틸아크릴레이트 등의 아크릴산알킬에스테르; 시클로헥실(메트)아크릴레이트, 2-메틸시클로헥실(메트)아크릴레이트, 디시클로펜타닐(메트)아크릴레이트 등의 (메트)아크릴산시클로알킬에스테르; 시클로헥실아크릴레이트, 2-메틸시클로헥실아크릴레이트 등의 아크릴산시클로알킬에스테르; 페닐(메트)아크릴레이트, 벤질(메트)아크릴레이트 등의 (메트)아크릴산아릴에스테르; 페닐아크릴레이트, 벤질아크릴레이트 등의 아크릴산아릴에스테르 중에서 선택된 어느 하나의 단독 중합체 또는 2종 이상의 공중합체인 것이 바람직할 수 있다.Moreover, although acrylic resin can also be used, (meth) acrylic-acid alkylester, such as methyl (meth) acrylate, ethyl (meth) acrylate, butyl (meth) acrylate, and 2-ethylhexyl (meth) acrylate, for example. ; Alkyl acrylates such as methyl acrylate, ethyl acrylate and butyl acrylate; (Meth) acrylic acid cycloalkyl esters such as cyclohexyl (meth) acrylate, 2-methylcyclohexyl (meth) acrylate and dicyclopentanyl (meth) acrylate; Acrylic acid cycloalkyl esters such as cyclohexyl acrylate and 2-methylcyclohexyl acrylate; (Meth) acrylic acid aryl esters, such as phenyl (meth) acrylate and benzyl (meth) acrylate; It may be preferable that it is any one homopolymer or 2 or more types of copolymers chosen from acrylic acid aryl esters, such as phenyl acrylate and benzyl acrylate.
상기 기재층(101)의 파장 380 내지 780nm에서의 헤이즈는 1.0% 이하일 수 있으며, 그 두께는 5 내지 1000㎛, 구체적으로 10 내지 100㎛일 수 있으나, 이에 한정되는 것은 아니다. Haze at the wavelength of 380 to 780 nm of the base layer 101 may be 1.0% or less, and the thickness thereof may be 5 to 1000 μm, specifically 10 to 100 μm, but is not limited thereto.
본 발명의 한 양태에 따른 도광필름(100)은 전술한 기재층(101)의 적어도 일 면 상에 광학패턴층(102)를 포함하고, 상기 광학패턴층(102)은 각각 1종 이상의 (메트)아크릴계 공중합체, (메트)아크릴계 에스테르 모노머, 광개시제 및 아지리딘 가교제를 함유하는 조성물의 경화물을 포함한다. The light guide film 100 according to an aspect of the present invention includes an optical pattern layer 102 on at least one surface of the substrate layer 101 described above, and each of the optical pattern layers 102 includes one or more (meth) ) Cured product of the composition containing an acrylic copolymer, a (meth) acrylic ester monomer, a photoinitiator, and an aziridine crosslinking agent.
상기 광학패턴층(102)은 전술한 기재층(101)의 적어도 일 면 상에 형성되며, 광학패턴을 포함함으로써 입사된 광을 인도하여 확산 또는 집광하는 역할을 한다. The optical pattern layer 102 is formed on at least one surface of the substrate layer 101 described above, and includes an optical pattern to guide and diffuse or condense incident light.
본 발명의 일 실시형태에 따르면 상기 광학패턴은 렌티큘러렌즈 패턴, 프리즘 패턴, 마이크로렌즈 패턴, 엠보 패턴 및 도트 패턴으로 이루어진 군으로부터 선택되는 하나 이상을 포함할 수 있다. 이와 같은 광학패턴은 연속적 또는 소정의 간격으로 배치될 수도 있으며, 광원으로부터 멀어짐에 따라 산란패턴밀도가 증가되거나, 일정하게 유지할 수도 있다. According to an embodiment of the present invention, the optical pattern may include at least one selected from the group consisting of a lenticular lens pattern, a prism pattern, a microlens pattern, an embossing pattern, and a dot pattern. Such optical patterns may be disposed continuously or at predetermined intervals, and the scattering pattern density may increase or remain constant as the optical pattern is moved away from the light source.
본 발명의 아크릴계 공중합체는 탄소수 1 내지 12의 알킬기를 갖는 (메트)아크릴레이트 단량체 및 가교 가능한 관능기를 갖는 중합성 단량체를 포함하여 중합된 것일 수 있다.The acrylic copolymer of the present invention may be polymerized including a (meth) acrylate monomer having an alkyl group having 1 to 12 carbon atoms and a polymerizable monomer having a crosslinkable functional group.
상기 탄소수 1 내지 12의 알킬기를 갖는 (메트)아크릴레이트 단량체로는 n-부틸(메트)아크릴레이트, 2-부틸(메트)아크릴레이트, t-부틸(메트)아크릴레이트, 2-에틸헥실(메트)아크릴레이트, 에틸(메트)아크릴레이트, 메틸(메트)아크릴레이트, n-프로필(메트)아크릴레이트, 이소프로필(메트)아크릴레이트, 펜틸(메트)아크릴레이트, n-옥틸(메트)아크릴레이트, 이소옥틸(메트)아크릴레이트, 노닐(메트)아크릴레이트, 데실(메트)아크릴레이트, 라우릴(메트)아크릴레이트 등을 들 수 있으며, 이들 중에서 n-부틸아크릴레이트, 2-에틸헥실아크릴레이트 또는 이들의 혼합물이 바람직하다. 이들은 단독 또는 2종 이상 혼합하여 사용할 수 있다.Examples of the (meth) acrylate monomer having an alkyl group having 1 to 12 carbon atoms include n-butyl (meth) acrylate, 2-butyl (meth) acrylate, t-butyl (meth) acrylate, and 2-ethylhexyl (meth ) Acrylate, ethyl (meth) acrylate, methyl (meth) acrylate, n-propyl (meth) acrylate, isopropyl (meth) acrylate, pentyl (meth) acrylate, n-octyl (meth) acrylate Isooctyl (meth) acrylate, nonyl (meth) acrylate, decyl (meth) acrylate, lauryl (meth) acrylate, and the like, among which n-butyl acrylate and 2-ethylhexyl acrylate Or mixtures thereof. These can be used individually or in mixture of 2 or more types.
상기 탄소수 1 내지 12의 알킬기를 갖는 (메트)아크릴레이트 단량체의 함량 및 혼합비는 특별히 한정되지 않으며, 예를 들면, 전체 점착제층 조성물의 고형분 100 중량부에 대하여 85 내지 99 중량부로 포함될 수 있으며, 바람직하게는 90 내지 95 중량부일 수 있다. The content and mixing ratio of the (meth) acrylate monomer having an alkyl group having 1 to 12 carbon atoms is not particularly limited, and may be included, for example, in an amount of 85 to 99 parts by weight based on 100 parts by weight of the solids of the entire pressure-sensitive adhesive layer composition. Preferably from 90 to 95 parts by weight.
상기 가교 가능한 관능기를 갖는 중합성 단량체로는 예컨대, 카르복시기를 갖는 단량체, 하이드록시기를 갖는 단량체, 아미드기를 갖는 단량체, 3차 아민기를 갖는 단량체 등을 들 수 있으며, 이들은 단독 또는 2종 이상 혼합하여 사용할 수 있다.Examples of the polymerizable monomer having a crosslinkable functional group include a monomer having a carboxyl group, a monomer having a hydroxy group, a monomer having an amide group, a monomer having a tertiary amine group, and the like, and these may be used alone or in combination of two or more thereof. Can be.
상기 카르복시기를 갖는 단량체로는 (메트)아크릴산, 크로톤산 등의 1가산, 말레인산, 이타콘산, 푸마르산 등의 2가산 및 이들의 모노알킬에스테르, 3-(메트)아크릴로일프로피온산, 알킬기의 탄소수가 2 또는 3인 2-하이드록시알킬(메트)아크릴레이트의 무수호박산 개환 부가체, 알킬렌기의 탄소수가 2 내지 4인 하이드록시알킬렌글리콜(메타)아크릴레이트의 무수 호박산 개환 부가체, 알킬기의 탄소수가 2 또는 3인 2-하이드록시알킬(메트)아크릴레이트의 카프로락톤 부가체에 무수 호박산을 개환 부가시킨 화합물 등을 들 수 있으며, 상기 (메트)아크릴산은 지환식 치환기를 포함할 수도 있는데, 구체적으로 시클로펜틸(메타)아크릴레이트, 디시클로펜틸(메타)아크릴레이트, 시클로헥실(메타)아크릴레이트, 메틸시클로헥실(메타)아크릴레이트, 시클로헵틸(메타)아크릴레이트, 시클로옥틸(메타)아크릴레이트, 시클로펜테닐(메타)아크릴레이트, 시클로헥세닐(메타)아크릴레이트, 시클로헵테닐(메타)아크릴레이트, 시클로옥테닐(메타)아크릴레이트, 이소보르닐(메타)아크릴레이트, 피나닐(메타)아크릴레이트, 아다만틸(메타)아크릴레이트, 노르보르닐(메타)아크릴레이트, 글리시딜(메타)아크릴레이트, 3,4-에폭시시클로헥실(메타)아크릴레이트, 3,4-에폭시시클로헥실메틸(메타)아크릴레이트, 메틸글리시딜(메타)아크릴레이트, 테트라하이드로퍼퓨릴 아크릴레이트 등의 지환식 치환기를 포함하는 불포화 카르복실산 에스테르 화합물 등을 들 수 있다. 전술한 단량체 중에서 (메트)아크릴산이 바람직할 수 있으나, 이에 한정되는 것은 아니다.Examples of the monomer having a carboxy group include monovalent acids such as (meth) acrylic acid and crotonic acid, diacids such as maleic acid, itaconic acid and fumaric acid, and monoalkyl esters thereof, 3- (meth) acryloylpropionic acid and carbon number of an alkyl group. Succinic anhydride ring-opening adduct of 2 or 3 2-hydroxyalkyl (meth) acrylate, Succinic anhydride ring-opening adduct of hydroxyalkylene glycol (meth) acrylate of 2 to 4 carbon atoms, and carbon number of alkyl group And a compound obtained by ring-opening addition of succinic anhydride to a caprolactone adduct of 2-hydroxyalkyl (meth) acrylate having 2 or 3, and the (meth) acrylic acid may include an alicyclic substituent. Cyclopentyl (meth) acrylate, dicyclopentyl (meth) acrylate, cyclohexyl (meth) acrylate, methylcyclohexyl (meth) acrylate, cycloheptyl ( Ta) acrylate, cyclooctyl (meth) acrylate, cyclopentenyl (meth) acrylate, cyclohexenyl (meth) acrylate, cycloheptenyl (meth) acrylate, cyclooctenyl (meth) acrylate, iso Bornyl (meth) acrylate, finanyl (meth) acrylate, adamantyl (meth) acrylate, norbornyl (meth) acrylate, glycidyl (meth) acrylate, 3,4-epoxycyclohexyl Unsaturated carboxylic acid ester compound containing alicyclic substituents, such as (meth) acrylate, 3, 4- epoxycyclohexylmethyl (meth) acrylate, methylglycidyl (meth) acrylate, and tetrahydrofurfuryl acrylate Etc. can be mentioned. Among the aforementioned monomers, (meth) acrylic acid may be preferred, but is not limited thereto.
상기 하이드록시기를 갖는 단량체로는 2-하이드록시에틸(메트)아크릴레이트, 2-하이드록시프로필(메트)아크릴레이트, 2-하이드록시부틸(메트)아크릴레이트, 4-하이드록시부틸(메트)아크릴레이트, 6-하이드록시헥실(메트)아크릴레이트, 2-하이드록시에틸렌글리콜(메트)아크릴레이트, 2-하이드록시프로필렌글리콜(메트)아크릴레이트, 알킬렌기의 탄소수가 2 내지 4인 하이드록시알킬렌글리콜(메트)아크릴레이트, 4-하이드록시부틸비닐에테르, 5-하이드록시펜틸비닐에테르, 6-하이드록시헥실비닐에테르, 7-하이드록시헵틸비닐에테르, 8-하이드록시옥틸비닐에테르, 9-하이드록시노닐비닐에테르, 10-하이드록시데실비닐에테르 등을 들 수 있으며, 이들 중에서 4-하이드록시부틸비닐에테르가 바람직할 수 있으나, 이에 한정되는 것은 아니다.As a monomer which has the said hydroxyl group, 2-hydroxyethyl (meth) acrylate, 2-hydroxypropyl (meth) acrylate, 2-hydroxybutyl (meth) acrylate, 4-hydroxybutyl (meth) acryl 2-hydroxyhexyl (meth) acrylate, 2-hydroxyethylene glycol (meth) acrylate, 2-hydroxypropylene glycol (meth) acrylate, and hydroxyalkylene having 2 to 4 carbon atoms in the alkylene group. Glycol (meth) acrylate, 4-hydroxybutyl vinyl ether, 5-hydroxypentyl vinyl ether, 6-hydroxyhexyl vinyl ether, 7-hydroxyheptyl vinyl ether, 8-hydroxyoctyl vinyl ether, 9-hydroxy Hydroxynonyl vinyl ether, 10-hydroxydecyl vinyl ether, and the like, and of these, 4-hydroxybutyl vinyl ether may be preferred, but is not limited thereto.
상기 아미드기를 갖는 단량체로는 (메트)아크릴아미드, N-이소프로필아크릴아미드, N-3차부틸아크릴아미드, 3-하이드록시프로필(메트)아크릴아미드, 4-하이드록시부틸(메트)아크릴아미드, 6-하이드록시헥실(메트)아크릴아미드, 8-하이드록시옥틸(메트)아크릴아미드, 2-하이드록시에틸헥실(메트)아크릴아미드 등을 들 수 있으며, 이들 중에서 (메트)아크릴아미드가 바람직할 수 있으나, 이에 한정되는 것은 아니다.Examples of the monomer having an amide group include (meth) acrylamide, N-isopropylacrylamide, N-tert-butylacrylamide, 3-hydroxypropyl (meth) acrylamide, 4-hydroxybutyl (meth) acrylamide, 6-hydroxyhexyl (meth) acrylamide, 8-hydroxyoctyl (meth) acrylamide, 2-hydroxyethylhexyl (meth) acrylamide, and the like. Among these, (meth) acrylamide may be preferable. However, the present invention is not limited thereto.
상기 3차 아민기를 갖는 단량체로는 N,N-(디메틸아미노)에틸(메트)아크릴레이트, N,N-(디에틸아미노)에틸(메트)아크릴레이트, N,N-(디메틸아미노)프로필(메트)아크릴레이트 등을 들 수 있으나, 이에 한정되는 것은 아니다.Examples of the monomer having a tertiary amine group include N, N- (dimethylamino) ethyl (meth) acrylate, N, N- (diethylamino) ethyl (meth) acrylate, and N, N- (dimethylamino) propyl ( Meth) acrylate, and the like, but is not limited thereto.
본 발명에서 아크릴계 공중합체는 상기 단량체들 이외에 당 분야에 공지된 중합성 단량체를 더 포함할 수도 있으며, 예를 들면 2관능 이상의 아크릴레이트계 단량체를 들 수 있으며, 구체적으로 1,3-부탄디올디(메타)아크릴레이트, 1,4-부탄디올디(메타)아크릴레이트, 1,6-헥산디올디(메타)아크릴레이트, 에틸렌글리콜디(메타)아크릴레이트, 비스페놀A-에틸렌글리콜디아크릴레이트, 디에틸렌글리콜디(메타)아크릴레이트, 트리에틸렌글리콜디(메타)아크릴레이트, 폴리에틸렌글리콜디(메타)아크릴레이트, 프로필렌글리콜디(메타)아크릴레이트, 디프로필렌글리콜디(메타)아크릴레이트, 트리프로필렌글리콜디(메타)아크릴레이트, 네오펜틸글리콜디(메타)아크릴레이트, 디시클로펜타닐디(메타)아크릴레이트, 카프로락톤 변성 디시클로펜테닐디(메타)아크릴레이트, 에틸렌옥사이드 변성 인산디(메타)아크릴레이트, 비스(2-히드록시에틸)이소시아누레이트디(메타)아크릴레이트, 디(아크릴옥시에틸)이소시아누레이트, 알릴화 시클로헥실디(메타)아크릴레이트, 디메틸올디시클로펜탄디아크릴레이트, 에틸렌옥사이드 변성 헥사히드로프탈산디아크릴레이트, 트리시클로데칸디메탄올아크릴레이트, 네오펜틸글리콜 변성 트리메틸올프로판디아크릴레이트, 아다만탄디아크릴레이트 등의 2관능성 단량체; 트리메틸올프로판트리(메타)아크릴레이트, 펜타에리트리톨트리(메타)아크릴레이트, 디펜타에리트리톨트리(메타)아크릴레이트, 프로피온산 변성 디펜타에리트리톨트리(메타)아크릴레이트, 프로필렌옥사이드 변성 트리메틸올프로판트리(메타)아크릴레이트, 트리스(2-히드록시에틸)이소시아누레이트트리(메타)아크릴레이트, 트리스(아크릴옥시에틸)이소시아누레이트, 글리세롤트리(메타)아크릴레이트 등의 3관능성 단량체; 디글리세린테트라(메타)아크릴레이트, 펜타에리트리톨테트라(메타)아크릴레이트, 디트리메틸올프로판테트라(메타)아크릴레이트 등의 4관능성 단량체; 프로피온산 변성 디펜타에리트리톨펜타(메타)아크릴레이트 등의 5관능성 단량체; 디펜타에리트리톨헥사(메타)아크릴레이트, 카프로락톤 변성 디펜타에리트리톨헥사(메타)아크릴레이트 등의 6관능성 단량체 등을 들 수 있다.In the present invention, the acrylic copolymer may further include a polymerizable monomer known in the art in addition to the above monomers, and examples thereof include bifunctional or higher acrylate monomers, and specifically 1,3-butanedioldi ( Meta) acrylate, 1,4-butanedioldi (meth) acrylate, 1,6-hexanedioldi (meth) acrylate, ethylene glycoldi (meth) acrylate, bisphenol A-ethylene glycol diacrylate, diethylene Glycol di (meth) acrylate, triethylene glycol di (meth) acrylate, polyethylene glycol di (meth) acrylate, propylene glycol di (meth) acrylate, dipropylene glycol di (meth) acrylate, tripropylene glycol di (Meth) acrylate, neopentyl glycol di (meth) acrylate, dicyclopentanyldi (meth) acrylate, caprolactone modified dicyclopentenyldi (meth) acrylate Yite, ethylene oxide modified phosphate di (meth) acrylate, bis (2-hydroxyethyl) isocyanurate di (meth) acrylate, di (acryloxyethyl) isocyanurate, allylated cyclohexyldi (meth ) Functionality such as acrylate, dimethylol dicyclopentane diacrylate, ethylene oxide modified hexahydrophthalic acid diacrylate, tricyclodecane dimethanol acrylate, neopentyl glycol modified trimethylolpropane diacrylate, adamantane diacrylate Acidic monomers; Trimethylolpropane tri (meth) acrylate, pentaerythritol tri (meth) acrylate, dipentaerythritol tri (meth) acrylate, propionic acid modified dipentaerythritol tri (meth) acrylate, propylene oxide modified trimethylolpropane Trifunctional monomers such as tri (meth) acrylate, tris (2-hydroxyethyl) isocyanurate tri (meth) acrylate, tris (acryloxyethyl) isocyanurate, and glycerol tri (meth) acrylate ; Tetrafunctional monomers such as diglycerin tetra (meth) acrylate, pentaerythritol tetra (meth) acrylate, ditrimethylolpropane tetra (meth) acrylate; Pentafunctional monomers such as propionic acid-modified dipentaerythritol penta (meth) acrylate; Hexafunctional monomers, such as dipentaerythritol hexa (meth) acrylate and caprolactone modified dipentaerythritol hexa (meth) acrylate, etc. are mentioned.
상기 아크릴계 공중합체의 제조방법은 특별히 한정되지 않으며, 당 분야에서 통상적으로 사용되는 괴상중합, 용액중합, 유화중합 또는 현탁중합 등의 방법을 이용하여 제조할 수 있으며, 용액중합이 바람직하다. 또한, 중합시 통상 사용되는 용매, 중합개시제, 분자량 제어를 위한 연쇄이동제 등을 사용할 수 있다. The method of preparing the acrylic copolymer is not particularly limited, and may be prepared using a method such as bulk polymerization, solution polymerization, emulsion polymerization or suspension polymerization, which are commonly used in the art, and solution polymerization is preferable. In addition, a solvent, a polymerization initiator, a chain transfer agent for molecular weight control, and the like, which are usually used in the polymerization, may be used.
상기 (메트)아크릴계 공중합체는 (메트)아크릴계 공중합체 및 (메트)아크릴계 에스테르 모노머 전체 100중량%에 대하여, 5 내지 50중량%, 구체적으로 10 내지 25중량%로 포함될 수 있다. 상기 함량 범위 내로 포함되는 경우 기재에 광학패턴층 형성을 위한 조성물을 도포 후 UV경화 시 경화 수축을 억제할 수 있는 이점이 있다.The (meth) acrylic copolymer may be included in an amount of 5 to 50% by weight, specifically 10 to 25% by weight, based on 100% by weight of the (meth) acrylic copolymer and the (meth) acrylic ester monomer. When included in the content range there is an advantage that can be cured shrinkage upon curing the UV after applying the composition for forming the optical pattern layer on the substrate.
상기 (메트)아크릴계 에스테르 모노머의 구체적인 예는 전술한 (메트)아크릴계 공중합체 제조를 위해 사용된 각 모노머들의 구성이 동일하게 적용될 수 있다.Specific examples of the (meth) acrylic ester monomer may be identically applied to the configuration of the monomers used for preparing the (meth) acrylic copolymer.
상기 (메트)아크릴계 에스테르 모노머는 (메트)아크릴계 공중합체 및 (메트)아크릴계 에스테르 모노머 전체 100중량%에 대하여, 50 내지 95중량%, 바람직하게는 75 내지 90중량%로 포함될 수 있다. 상기 함량 범위 내로 포함되는 경우 탄성율 및 응집력을 조절하여 광학패턴층에 우수한 기계적 특성을 부여할 수 있는 이점이 있다.The (meth) acrylic ester monomer may be included in an amount of 50 to 95% by weight, preferably 75 to 90% by weight based on 100% by weight of the (meth) acrylic copolymer and 100% of the (meth) acrylic ester monomer. When included in the content range there is an advantage that can provide excellent mechanical properties to the optical pattern layer by adjusting the elastic modulus and cohesion.
상기 아지리딘 가교제는 함께 포함되는 (메트)아크릴계 중합체, (메트)아크릴계 에스테르 모노머, 및/또는 기재층(101)과 반응하여 접착력을 향상시키는 역할을 하며, 이로 인해 별도의 밀착력 증진층 없이도 광학패턴층(102)과 기재층(101)간의 밀착력이 우수한 도막필름(100)을 제조할 수 있는 이점이 있다. 특히, 상기 아지리딘 가교제의 경우 아크릴계 기재층에 대한 접착능력이 보다 우수할 수 있는데, 구체적으로 상기 아지리딘 가교제는 아지리딘 관능기가 기재층(101) 표면의 친수성기와 같은 관능기와 반응할 수 있고, 상기 가교제를 포함하는 조성물은 젖음성이 향상될 수 있다. 따라서, 기재층(101)에 높은 접착특성을 보일 수 있는 이점이 있다.The aziridine crosslinking agent reacts with the (meth) acrylic polymer, the (meth) acrylic ester monomer, and / or the base layer 101 together to improve the adhesive force, and thereby the optical pattern without a separate adhesion enhancing layer. The coating film 100 having excellent adhesion between the layer 102 and the base layer 101 may be manufactured. In particular, in the case of the aziridine crosslinking agent, the adhesion to the acrylic base layer may be more excellent. Specifically, the aziridine crosslinking agent may react with a functional group such as a hydrophilic group on the surface of the base layer 101, The composition including the crosslinking agent may improve wettability. Therefore, there is an advantage that can exhibit a high adhesive property to the base layer 101.
상기 아지리딘 가교제는 예를 들면, 펜타에리스톨-트리스-(베타-(N-아지리디닐)프로피오네이트, 트리메틸올프로판-트리스(베타-N-아지리디닐)프로피오네이트, 트리메틸올프로판-트리스(2-메틸-1-아지리딘프로피오네이트), 2-메틸아지리딘, 리튬 L-아지리딘-2-카르복실레이트, N-토실아지리딘, 1-(2-시아노에틸)아지리딘, 1-(벤질설포닐)아지리딘, 1-(P-토실)아지리딘 및 1-페닐메탄설포닐아지리딘 등을 들 수 있으나, 이에 한정되는 것은 아니고, 접착성능이 보다 우수하다는 점에서 트리메틸올프로판-트리스(베타-N-아지리디닐)프로피오네이트 가 바람직하게 사용될 수 있다. The aziridine crosslinking agent is, for example, pentaerythritol-tris- (beta- (N-aziridinyl) propionate, trimethylolpropane-tris (beta-N-aziridinyl) propionate, trimethylolpropane -Tris (2-methyl-1-aziridinepropionate), 2-methylaziridine, lithium L-aziridine-2-carboxylate, N-tosylaziridine, 1- (2-cyanoethyl) aziri Dine, 1- (benzylsulfonyl) aziridine, 1- (P-tosyl) aziridine, and 1-phenylmethanesulfonylaziridine, and the like, but are not limited thereto. Trimethylolpropane-tris (beta-N-aziridinyl) propionate can be preferably used.
상기 아지리딘 가교제는 이를 포함하는 조성물 전체 100중량%에 대하여 0.1 내지 5.0중량%, 바람직하게는 0.5 내지 2.0중량%로 포함될 수 있다. 상기 가교제가 상기 범위 내로 포함되는 경우 기재와의 밀착력이 향상되어 내구성이 향상 될 수 있으며, 내열 또는 내습열 상황에서 필름의 이를 포함하는 필름의 색상변화 값을 최소화 할 수 있는 이점이 있다. The aziridine crosslinking agent may be included in an amount of 0.1 to 5.0 wt%, preferably 0.5 to 2.0 wt%, based on 100 wt% of the total composition including the same. When the crosslinking agent is included in the above range, the adhesion to the substrate may be improved and the durability may be improved, and there is an advantage of minimizing the color change value of the film including the film in a heat or moisture resistant condition.
본 발명의 일 실시형태에 따르면 광학패턴층 형성을 위한 조성물은 전술한 구성들 이외의 광개시제를 더 포함할 수 있다. 상기 광개시제는 당 업계에서 광개시제로서 사용되는 것이라면 특별한 제한 없이 사용될 수 있으나, 구체적으로 자유라디칼 광개시제일 수 있다. 상기 자유라디칼 광개시제는 상기 조성물로 형성되는 광학패턴층(102) 내부 및 표면 경화를 충분히 진행시키는 역할을 할 수 있다.According to an embodiment of the present invention, the composition for forming the optical pattern layer may further include a photoinitiator other than the above-described configurations. The photoinitiator may be used without particular limitation as long as it is used as a photoinitiator in the art, and specifically, may be a free radical photoinitiator. The free radical photoinitiator may serve to sufficiently advance the inside and surface curing of the optical pattern layer 102 formed of the composition.
상기 자유라디칼 광개시제의 구체적인 예로는, 벤조인, 벤조인메틸에테르, 벤조인에틸에테르, 벤조인이소프로필에테르, 벤조인-n-부틸에테르, 벤조인이소부틸에테르, 아세토페논, 히드록시디메틸아세토페논, 디메틸아미노아세토페논, 디메톡시-2-페닐아세토페논, 3-메틸아세토페논, 2,2-디메톡시-2-페닐아세토페논, 2,2-디에톡시-2-페닐아세토페논, 4-크로놀로세토페논, 4,4-디메톡시아세토페논, 2-히드록시-2-메틸-1-페닐프로판-1-온, 4-히드록시시클로페닐케톤, 1-히드록시시클로헥실페닐케톤, 2-메틸-1-[4-(메틸티오)페닐]-2-모르폴리노-프로판-1-온, 4-(2-히드록시에톡시)페닐-2-(히드록시-2-프로필)케톤, 벤조페논, p-페닐벤조페논, 4,4-디아미노벤조페논, 4,4'-디에틸아미노벤조페논, 디클로로벤조페논, 안트라퀴논, 2-메틸안트라퀴논, 2-에틸안트라퀴논, 2-t-부틸안트라퀴논, 2-아미노안트라퀴논, 2-메틸티옥산톤, 2-에틸티옥산톤, 2-클로로티옥산톤, 2,4-디메틸티옥산톤, 2,4-디에틸티옥산톤, 벤질디메틸케탈, 디페닐케톤벤질디메틸케탈, 아세토페논디메틸케탈, p-디메틸아미노벤조산에스테르, 2,4,6-트리메틸벤조일-디페닐-포스핀옥사이드, 플루오렌, 트리페닐아민, 카바졸 등을 들 수 있다. 또한, 시판되고 있는 제품으로 상품명 Darocur 1173, Igacure 184, Igacure 907, Igacure-1700 (Ciba사) 등도 사용할 수 있다. 이들은 단독 또는 2종 이상 조합하여 사용할 수 있다.Specific examples of the free radical photoinitiator include benzoin, benzoin methyl ether, benzoin ethyl ether, benzoin isopropyl ether, benzoin-n-butyl ether, benzoin isobutyl ether, acetophenone, hydroxydimethylacetophenone , Dimethylaminoacetophenone, dimethoxy-2-phenylacetophenone, 3-methylacetophenone, 2,2-dimethoxy-2-phenylacetophenone, 2,2-diethoxy-2-phenylacetophenone, 4-chrome Norosecetophenone, 4,4-dimethoxyacetophenone, 2-hydroxy-2-methyl-1-phenylpropan-1-one, 4-hydroxycyclophenyl ketone, 1-hydroxycyclohexylphenyl ketone, 2- Methyl-1- [4- (methylthio) phenyl] -2-morpholino-propane-1-one, 4- (2-hydroxyethoxy) phenyl-2- (hydroxy-2-propyl) ketone, Benzophenone, p-phenylbenzophenone, 4,4-diaminobenzophenone, 4,4'-diethylaminobenzophenone, dichlorobenzophenone, anthraquinone, 2-methylanthraquinone, 2-ethylanthraquinone, 2- t-butylene Laquinone, 2-aminoanthraquinone, 2-methyl thioxanthone, 2-ethyl thioxanthone, 2-chlorothioxanthone, 2,4-dimethyl thioxanthone, 2,4-diethyl thioxanthone, benzyl Dimethyl ketal, diphenyl ketone benzyl dimethyl ketal, acetophenone dimethyl ketal, p-dimethylaminobenzoic acid ester, 2,4,6-trimethylbenzoyl-diphenyl-phosphine oxide, fluorene, triphenylamine, carbazole and the like Can be. Moreover, as a commercially available product, brand names Darocur 1173, Igacure 184, Igacure 907, Igacure-1700 (Ciba company), etc. can also be used. These can be used individually or in combination of 2 or more types.
상기 광개시제는 이를 포함하는 조성물 전체 100중량%에 대하여 0.01 내지 3중량%, 바람직하게는 0.1 내지 2중량%, 더욱 바람직하게는 0.5 내지 1중량%로 포함될 수 있다.The photoinitiator may be included in an amount of 0.01 to 3% by weight, preferably 0.1 to 2% by weight, more preferably 0.5 to 1% by weight, based on 100% by weight of the total composition including the same.
상기 광개시제가 상기 범위 내로 포함될 경우 이를 포함하는 조성물로 형성되는 광학패턴층(102)의 내부 및 표면 경화가 우수하여 내구성이 향상될 수 있는 이점이 있다.When the photoinitiator is included in the above range, the internal and surface hardening of the optical pattern layer 102 formed of the composition including the same may be excellent, and thus durability may be improved.
이외에도 본 발명에 따른 광학패턴층(102) 형성을 위한 조성물은 전술한 목적을 저해하지 않는 범위 내에서 추가 첨가제들을 더 포함할 수도 있다. 예를 들면, 산화방지제, 실란 커플링제, 광안정제, 분산제, 소포제, 충전제. 윤활제, 계면 활성제, 부식 방지제 등과 같은 성분들을 특성에 따라 적절히 포함할 수 있으며, 이는 사용자의 활용 목적에 따라 달라질 수 있는 구성이므로, 본 발명에서는 특별히 그 구성에 대해 한정하지 않는다.In addition, the composition for forming the optical pattern layer 102 according to the present invention may further include additional additives within a range that does not inhibit the above object. For example, antioxidants, silane coupling agents, light stabilizers, dispersants, antifoaming agents, fillers. Components such as lubricants, surfactants, corrosion inhibitors, and the like may be appropriately included according to properties, and this is a configuration that may vary depending on a user's purpose of use, and thus the present invention is not particularly limited to the configuration.
상기 광학패턴층(102)의 두께는 예를 들면 5 내지 100㎛, 구체적으로 10 내지 50㎛일 수 있으나, 이에 한정되는 것은 아니다. The thickness of the optical pattern layer 102 may be, for example, 5 to 100 μm, specifically 10 to 50 μm, but is not limited thereto.
백라이트 유닛Backlight unit
본 발명의 다른 양태에 따른 백라이트 유닛은 전술한 도광필름(100); 및 상기 도광필름(100)의 적어도 일 면 상에 배치되고 역프리즘이 형성된 집광시트;를 포함하는 것을 특징으로 함으로써, 내구성이 우수하고 박형화되는 이점이 있다.According to another aspect of the present invention, a backlight unit includes the above-described light guide film 100; And a light collecting sheet disposed on at least one surface of the light guide film 100 and having a reverse prism formed therein, which has advantages of being excellent in durability and thinning.
상기 백라이트 유닛은 구체적으로, 광원, 광원으로부터 입사된 광을 안내하는 도광필름(100), 상기 도광필름(100)의 일 면에 배치되는 역프리즘이 형성된 집광시트를 포함할 수 있으며, 상기 도광필름(100)의 다른 일 면에는 필요에 따라 점착시트가 더 포함될 수 있다.The backlight unit may include a light source, a light guide film 100 for guiding light incident from the light source, and a light collecting sheet having a reverse prism disposed on one surface of the light guide film 100. The other side of the 100 may further include an adhesive sheet as needed.
상기 광원은 광을 발생시키는 것으로, 선광원 램프 또는 면광원 램프, CCFL 또는 LED 등 다양한 광원들이 사용될 수 있으며, 본 발명에서는 그 종류를 특별히 한정하지 않는다. 상기 광원의 외부에는 광원 보호를 목적으로 광원 커버가 더 형성될 수도 있다. 본 발명의 백라이트 유닛에서 상기 광원의 위치는 특별히 한정되는 것은 아니나, 일 예를 들면 도광필름(100)의 측면에 배치되는 엣지(edge)형 타입일 수 있다. The light source generates light, and various light sources such as a line light source lamp or a surface light source lamp, CCFL, or LED may be used, and the present invention is not particularly limited in kind. A light source cover may be further formed outside the light source for the purpose of protecting the light source. The position of the light source in the backlight unit of the present invention is not particularly limited, but may be, for example, an edge type type disposed on the side surface of the light guide film 100.
상기 도광필름(100)은 광원으로부터 입사된 광을 프리즘 시트로 안내하는 역할을 할 수 있다. The light guide film 100 may serve to guide the light incident from the light source to the prism sheet.
상기 역프리즘이 형성된 집광시트는 도광필름(100)으로부터 입사된 광을 집광시켜 광학시트로 공급하는 역할을 한다. 상기 역프리즘이 형성된 집광시트에는 1매 이상의 보호시트, 확신시트 등이 더 포함될 수도 있다. The condensing sheet on which the reverse prism is formed serves to condense the light incident from the light guide film 100 to supply the optical sheet. The condensing sheet on which the reverse prism is formed may further include at least one protective sheet, a sure sheet, and the like.
액정표시장치LCD Display
본 발명의 액정표시장치는 전술한 백라이트 유닛을 포함함으로써 박형화되는 이점이 있다. The liquid crystal display of the present invention has the advantage of being thinner by including the above-described backlight unit.
상기 액정표시장치는 본 발명의 백라이트 유닛, 액정표시장치용 패널 및 편광판을 포함할 수 있다. The liquid crystal display device may include a backlight unit, a liquid crystal display panel, and a polarizing plate of the present invention.
상기 액정표시장치용 패널은 제1기판과 제2기판 사이에 봉입된 액정셀층을 포함하는 액정패널을 포함하고, 상기 액정셀층은 VA(Verticla Alignment) 모드, IPS(In Place Switching) 모드, FFS(Fringe Field Switching) 모드, TN(Twisted Nematic) 모드 등이 될 수 있으나, 이에 한정되는 것은 아니다. The liquid crystal display panel includes a liquid crystal panel including a liquid crystal cell layer encapsulated between a first substrate and a second substrate, wherein the liquid crystal cell layer includes a VA (Verticla Alignment) mode, an IPS (In Place Switching) mode, and an FFS ( It may be a Fringe Field Switching (TN) mode, a twisted nematic (TN) mode, or the like, but is not limited thereto.
상기 편광판은 편광자 및 상기 편광자의 적어도 일 면 상에 보호필름, 위상차 필름 등이 형성된 것일 수 있으나, 이에 한정되는 것은 아니고 당 업계에서 편광판으로 사용되는 것이라면 제한 없이 사용할 수 있다. The polarizer may be a polarizer and a protective film, a retardation film, or the like formed on at least one surface of the polarizer, but is not limited thereto and may be used without limitation as long as it is used as a polarizer in the art.
이하, 본 발명의 이해를 돕기 위하여 바람직한 실시예를 제시하나, 하기 실시예는 본 발명을 예시하는 것일 뿐 본 발명의 범주 및 기술사상 범위 내에서 다양한 변경 및 수정이 가능함은 당 업자에게 있어서 명백한 것이며, 이러한 변형 및 수정이 첨부된 특허청구범위에 속하는 것도 당연한 것이다. 이하의 실시예 및 비교예에서 함량을 나타내는 "%" 및 "부"는 특별히 언급하지 않는 한 중량 기준이다. Hereinafter, preferred examples are provided to aid the understanding of the present invention, but the following examples are merely for exemplifying the present invention, and it is apparent to those skilled in the art that various changes and modifications can be made within the scope and spirit of the present invention. Naturally, such modifications and variations fall within the scope of the appended claims. In the following Examples and Comparative Examples, "%" and "parts" indicating contents are by weight unless otherwise specified.
제조예Production Example : (: ( 메트MET )) 아크릴레이트Acrylate 공중합체의 제조 Preparation of Copolymer
질소가스가 환류되고 온도조절이 용이하도록 냉각장치를 설치한 1L의 반응기에 1,6-헥산다이올다이아크릴레이트(HDDA) 단량체 30중량%, 메틸메타크릴레이트(MMA) 단량체 50중량%, 테트라하이드로퍼퓨릴아크릴레이트(THFA) 10 중량%, 2-하이드록시에틸아크릴레이트(2-HEA) 10중량%로 이루어진 단량체 혼합물을 투입한 후 산소를 제거하기 위하여 질소가스를 1시간 동안 퍼징한 후, 80℃로 유지하였다. 상기 단량체 혼합물을 균일하게 혼합한 후, 상기 단량체 혼합물을 총 중량을 100 중량부로 하였을 때, 광개시제로 1-하이드록시-시클로헥실-페닐-케톤을 0.5중량부 투입하였다. 이후 교반시키며, UV램프(10mW)를 조사하여 전환율 10%의 (메타)아크릴레이트 공중합체(A1)을 제조하였다. 이에 대한 자세한 구성은 하기 표 1에 기재하였다.30 wt% of 1,6-hexanediol diacrylate (HDDA) monomer, 50 wt% of methyl methacrylate (MMA) monomer, tetra After adding a monomer mixture consisting of 10% by weight of hydroperfuryl acrylate (THFA) and 10% by weight of 2-hydroxyethyl acrylate (2-HEA), purging nitrogen gas for 1 hour to remove oxygen, It was kept at 80 ° C. After uniformly mixing the monomer mixture, when the total weight of the monomer mixture was 100 parts by weight, 0.5 part by weight of 1-hydroxy-cyclohexyl-phenyl-ketone was added as a photoinitiator. After stirring, the UV lamp (10mW) was irradiated to prepare a (meth) acrylate copolymer (A1) of 10% conversion. Detailed configuration thereof is described in Table 1 below.
실험예Experimental Example 1. 중량평균분자량 및 분자량 분포의 평가 1. Evaluation of weight average molecular weight and molecular weight distribution
상기 제조예에서 제조한 (메트)아크릴레이트 공중합체의 중량평균분자량 및 분자량 분포는 GPC를 사용하여, 이하의 조건으로 측정하였다. 검량선의 제작에는, Agilent system의 표준 폴리스티렌을 사용하여, 측정 결과를 환산하였다.The weight average molecular weight and molecular weight distribution of the (meth) acrylate copolymer prepared in the said preparation example were measured on condition of the following using GPC. The measurement result was converted into the calibration curve using standard polystyrene of Agilent system.
<중량평균분자량 측정 조건> <Weight average molecular weight measurement conditions>
측정기: Agilent GPC (Agilent 1200 series, 미국)Meter: Agilent GPC (Agilent 1200 series, USA)
컬럼: PL Mixed B 2개 연결Column: Connect 2 PL Mixed B
컬럼 온도: 40℃Column temperature: 40 ℃
용리액: 테트라히드로푸란Eluent: tetrahydrofuran
유속: 1.0mL/minFlow rate: 1.0mL / min
농도: ~1mg/mL (100 ㎕ injection)Concentration: ~ 1mg / mL (100 μl injection)
(중량부)Photoinitiator
(Parts by weight)
전환율
(%)Polymer
Conversion rate
(%)
분자량
(단위:만)Weight average
Molecular Weight
(Unit: only)
MMA: 메틸메타크릴레이트
THFA: 테트라하이드로퍼퓨릴아크릴레이트
2-HEA: 2-하이드록시에틸아크릴레이트
광개시제: 1-하이드록시-시클로헥실-페닐-케톤HDDA: 1,6-hexanediol diacrylate
MMA: Methyl methacrylate
THFA: tetrahydrofurfuryl acrylate
2-HEA: 2-hydroxyethyl acrylate
Photoinitiator: 1-hydroxy-cyclohexyl-phenyl-ketone
실시예Example 1 내지 4 및 1 to 4 and 비교예Comparative example 1. One.
상기 제조예의 (메트)아크릴레이트 공중합체, 광개시제 및 아지리딘 가교제의 함량을 하기 표 2의 조성으로 혼합하여 광학패턴층 형성용 조성물을 제조하였다.The content of the (meth) acrylate copolymer, photoinitiator and aziridine crosslinking agent of the preparation example was mixed in the composition of Table 2 to prepare a composition for forming an optical pattern layer.
상기에서 제조된 광학패턴층 형성용 조성물을 코로나 처리된 사이클로올레핀계 기재필름(제온사, 두께 40㎛) 상에 두께가 25㎛가 되도록 도포하고 렌티큘러렌즈 패턴이 인각된 소프트패턴몰드로 라미네이션하고 100mJ/㎠로 자외선 조사하여 1차 경화하였다. 소프트패턴몰드를 제거하고 1000mJ/㎠로 자외선 조사하여 2차 경화하여 도광필름을 완성하였다.The above-described composition for forming an optical pattern layer was coated on a corona treated cycloolefin-based substrate film (Xeon, 40 μm in thickness) so as to have a thickness of 25 μm, laminated with a soft pattern mold having a lenticular lens pattern imprinted therein, and then 100 mJ. Ultraviolet irradiation at / cm 2 cured primary. The soft pattern mold was removed and cured by UV irradiation at 1000 mJ / cm 2 to complete the light guide film.
(중량부)Photoinitiator
(Parts by weight)
CL-427: 트리메틸올프로판-트리스(베타-N-아지리디닐)프로피오네이트I-184: 1-hydroxy-cyclohexyl-phenyl-ketone
CL-427: trimethylolpropane-tris (beta-N-aziridinyl) propionate
실험예Experimental Example 2. 밀착력 평가 2. Evaluation of adhesion
실시예 1 내지 4 및 비교예 1에서 제조된 도광필름을 유리 기판에 점착시트를이용하여 부착하여 시험편을 제작하였다. 렌티큘러렌즈 패턴면을 커터칼로 1mm × 1mm 단위로 잘라 100개의 셀을 제조하였다. 테이프(Nichiban tape)를 붙이고 충분히 힘을 주어 붙인 후에 테이프를 45도 각도로 당겨 뜯어냈다. 100개의 셀 중 잔류하는 셀의 개수를 세었다. 이 때, 밀착력 평가 기준은 하기와 같으며 그 결과를 하기 표3에 나타내었다.The light guide films prepared in Examples 1 to 4 and Comparative Example 1 were attached to a glass substrate by using an adhesive sheet to prepare test pieces. 100 cells were prepared by cutting the lenticular lens pattern surface in 1 mm × 1 mm units with a cutter knife. Nichiban tape was attached and applied with sufficient force, and the tape was pulled off at an angle of 45 degrees. The number of remaining cells among the 100 cells was counted. At this time, the adhesion evaluation criteria are as follows and the results are shown in Table 3 below.
<평가 기준><Evaluation Criteria>
ⓞ: 잔류하는 셀의 개수 100개Ⓞ: 100 remaining cells
○: 잔류하는 셀의 개수 99 내지 95개○: the number of remaining cells 99 to 95
△: 잔류하는 셀의 개수 94 내지 70개△: number of remaining cells 94 to 70
×: 잔류하는 셀의 개수 69개 이하×: 69 or fewer cells remaining
실험예Experimental Example 3. 3. 분광측색계Spectrophotometer 평가 evaluation
실시예 1 내지 4 및 비교예 1에서 제조된 도광필름을 50㎜ × 50㎜ 크기로 절단하고 분광측색계(CM-3700A, 코니카미놀타社)를 이용하여 필름의 색상(b*)값을 평가하였다. 그 결과는 하기 표 3에 기재하였다. 이 때, 측정된 색상(b*) 값이 클수록 필름의 색이 황색 계열(yellowish)로 변하는 것을 의미하여 광학 성능이 저하되는 것으로 평가한다.The light guide films prepared in Examples 1 to 4 and Comparative Example 1 were cut to a size of 50 mm x 50 mm and the color (b *) values of the films were evaluated using a spectrophotometer (CM-3700A, Konica Minolta). . The results are shown in Table 3 below. In this case, the larger the value of the measured color (b *) means that the color of the film is changed to yellowish (yellowish), and the optical performance is evaluated to be deteriorated.
실험예Experimental Example 4. 내구성(내열, 4. Durability (heat resistant, 내습열Heat resistance ) 평가) evaluation
실시예 1 내지 4 및 비교예 1에서 제조된 도광필름의 기재면과 점착시트(이형필름/점착제/이형필름)의 이형필름을 박리한 면에 코로나처리를 하고 접합하여 제조된 시트를 100㎜×100㎜ 크기로 절단하고 다른 점착제면에 부착된 이형필름을 박리한 후 유리 기판(100㎜×100㎜×11㎜)에 부착하여 시편을 제작하였다. 100 mm x the sheet prepared by performing corona treatment and bonding the substrate surface of the light guide film manufactured in Examples 1 to 4 and Comparative Example 1 and the surface of the adhesive film (release film / adhesive / release film) to which the release film was peeled off. After cutting to 100 mm size and peeling the release film attached to the other pressure-sensitive adhesive surface was attached to a glass substrate (100 mm × 100 mm × 11 mm) to prepare a specimen.
내열 특성은 100℃의 온도에서 500시간 동안 방치한 후에 밀착력 평가를 상기 실험예 2와 동일하게 진행하였고, 내습열 특성은 85℃의 온도 및 85%RH의 조건 하에서 500시간 방치한 후에 밀착력 및 분광색차계 평가를 상기 실험예 2 및 실험예 3과 동일하게 진행하였다. 각 평가 기준 또한 상기 실험예 2 및 3과 동일하며, 그 결과는 하기 표 3에 기재하였다. After the heat resistance was left for 500 hours at a temperature of 100 ° C., the adhesion evaluation was carried out in the same manner as in Experimental Example 2, and the heat and moisture resistance was the adhesion and spectroscopy after being left for 500 hours at a temperature of 85 ° C. and 85% RH. Color difference evaluation was carried out in the same manner as in Experiment 2 and Experiment 3. Each evaluation criteria is also the same as Experimental Examples 2 and 3, the results are shown in Table 3 below.
상기 표 3을 참고하면, 본 발명에서 제시하는 구성인 (메트)아크릴계 공중합체, (메트)아크릴계 에스테르 모노머 및 아지리딘 가교제를 모두 포함하는 실시예 1 내지 4의 경우, 아지리딘 가교제를 포함하지 않는 비교에 1보다 밀착력이 우수함은 물론, 내열 및 내습열 상황에서의 색상 변화 값이 감소된 것을 확인할 수 있었다. Referring to Table 3, in Examples 1 to 4 including all of the (meth) acrylic copolymer, the (meth) acrylic ester monomer, and the aziridine crosslinking agent, the composition of the present invention does not include an aziridine crosslinking agent. Compared to the better than 1 in comparison, it was confirmed that the color change in the heat and moisture resistant conditions were reduced.
또한, 본 발명의 실시예를 보다 구체적으로 살펴보면, 아지리딘 가교제를 포함하고 본 발명에서 제시하는 아지리딘 가교제의 최상의 함량 범위 또한 만족하는 실시예 1 및 2의 경우가 내구성 및 색상 변화 측면에서 가장 우수한 효과를 보이는 것을 확인할 수 있었다.In addition, when looking at the embodiment of the present invention in more detail, Examples 1 and 2 including the aziridine crosslinking agent and also satisfies the best content range of the aziridine crosslinking agent proposed in the present invention is the most excellent in terms of durability and color change The effect was confirmed.
100: 도광필름
101: 기재층
102: 광학패턴층100: light guide film
101: substrate layer
102: optical pattern layer
Claims (7)
상기 기재층의 적어도 일 면 상에 광학패턴층;을 포함하고,
상기 광학패턴층은 각각 1종 이상의 (메트)아크릴계 공중합체, (메트)아크릴계 에스테르 모노머 및 아지리딘 가교제를 함유하는 조성물의 경화물을 포함하는 것을 특징으로 하는 도광필름.Base layer;
An optical pattern layer on at least one surface of the base layer;
The optical pattern layer comprises a cured product of a composition containing at least one (meth) acrylic copolymer, a (meth) acrylic ester monomer and an aziridine crosslinking agent, respectively.
상기 아지리딘 가교제는 이를 포함하는 조성물 전체 100중량%에 대하여, 0.5 내지 2.0중량%로 포함되는 것을 특징으로 하는 도광필름.The method of claim 1,
The aziridine crosslinking agent is 0.5 to 2.0% by weight based on 100% by weight of the total composition comprising the same.
상기 조성물은 광개시제를 더 포함하는 것을 특징으로 하는 도광필름.The method of claim 1,
The composition is a light guide film further comprises a photoinitiator.
상기 광학패턴층과 기재층의 굴절률 차가 0.02 이하인 것을 특징으로 하는 도광필름.The method of claim 1,
Light guide film, characterized in that the refractive index difference between the optical pattern layer and the base layer is 0.02 or less.
상기 광학패턴층은 광학패턴을 포함하며, 상기 광학 패턴은 렌티큘러렌즈 패턴, 프리즘 패턴, 마이크로렌즈 패턴, 엠보 패턴 및 도트 패턴으로 이루어진 군으로부터 선택되는 하나 이상을 포함하는 것을 특징으로 하는 도광필름. The method of claim 1,
The optical pattern layer includes an optical pattern, wherein the optical pattern includes at least one selected from the group consisting of a lenticular lens pattern, a prism pattern, a microlens pattern, an embossing pattern, and a dot pattern.
상기 도광필름의 적어도 일 면 상에 배치되고 역프리즘이 형성된 집광시트;를 포함하는 것을 특징으로 하는 백라이트 유닛.The light guide film of any one of claims 1 to 5; And
And a light collecting sheet disposed on at least one surface of the light guide film and having a reverse prism formed thereon.
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