JP2016528543A - 光学フィルム - Google Patents
光学フィルム Download PDFInfo
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- JP2016528543A JP2016528543A JP2016529730A JP2016529730A JP2016528543A JP 2016528543 A JP2016528543 A JP 2016528543A JP 2016529730 A JP2016529730 A JP 2016529730A JP 2016529730 A JP2016529730 A JP 2016529730A JP 2016528543 A JP2016528543 A JP 2016528543A
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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
- G02B5/3016—Polarising elements involving passive liquid crystal elements
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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
- G02B5/3083—Birefringent or phase retarding elements
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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
- G02F1/13363—Birefringent elements, e.g. for optical compensation
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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
- G02F1/1337—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers
- G02F1/133703—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers by introducing organic surfactant additives into the liquid crystal material
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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
- G02F1/137—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 characterised by the electro-optical or magneto-optical effect, e.g. field-induced phase transition, orientation effect, guest-host interaction or dynamic scattering
- G02F1/139—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 characterised by the electro-optical or magneto-optical effect, e.g. field-induced phase transition, orientation effect, guest-host interaction or dynamic scattering based on orientation effects in which the liquid crystal remains transparent
- G02F1/1396—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 characterised by the electro-optical or magneto-optical effect, e.g. field-induced phase transition, orientation effect, guest-host interaction or dynamic scattering based on orientation effects in which the liquid crystal remains transparent the liquid crystal being selectively controlled between a twisted state and a non-twisted state, e.g. TN-LC cell
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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
- G02F1/137—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 characterised by the electro-optical or magneto-optical effect, e.g. field-induced phase transition, orientation effect, guest-host interaction or dynamic scattering
- G02F1/139—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 characterised by the electro-optical or magneto-optical effect, e.g. field-induced phase transition, orientation effect, guest-host interaction or dynamic scattering based on orientation effects in which the liquid crystal remains transparent
- G02F1/1396—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 characterised by the electro-optical or magneto-optical effect, e.g. field-induced phase transition, orientation effect, guest-host interaction or dynamic scattering based on orientation effects in which the liquid crystal remains transparent the liquid crystal being selectively controlled between a twisted state and a non-twisted state, e.g. TN-LC cell
- G02F1/1397—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 characterised by the electro-optical or magneto-optical effect, e.g. field-induced phase transition, orientation effect, guest-host interaction or dynamic scattering based on orientation effects in which the liquid crystal remains transparent the liquid crystal being selectively controlled between a twisted state and a non-twisted state, e.g. TN-LC cell the twist being substantially higher than 90°, e.g. STN-, SBE-, OMI-LC cells
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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
- G02F1/13363—Birefringent elements, e.g. for optical compensation
- G02F1/133633—Birefringent elements, e.g. for optical compensation using mesogenic materials
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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
- G02F1/13363—Birefringent elements, e.g. for optical compensation
- G02F1/133636—Birefringent elements, e.g. for optical compensation with twisted orientation, e.g. comprising helically oriented LC-molecules or a plurality of twisted birefringent sublayers
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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
- G02F2413/00—Indexing scheme related to G02F1/13363, i.e. to birefringent elements, e.g. for optical compensation, characterised by the number, position, orientation or value of the compensation plates
- G02F2413/15—Indexing scheme related to G02F1/13363, i.e. to birefringent elements, e.g. for optical compensation, characterised by the number, position, orientation or value of the compensation plates with twisted orientation, e.g. comprising helically oriented LC-molecules or a plurality of twisted birefringent sublayers
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- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Mathematical Physics (AREA)
- Liquid Crystal (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Polarising Elements (AREA)
- Laminated Bodies (AREA)
Abstract
Description
R(650)/R(550)>R(550)/R(550)>R(450)/R(550)
R(λ)=d×(Nx−Ny)
次のような方式で液晶組成物を製造した。通常的にCLC(Choresteric Liquid Crystal)の製造に適用されるもので公知されたMerck社のRM(Reactive Mesogen)であるRM1230(キラル剤(chiral dopant)不込み組成)とRM1231(キラル剤(chiral dopant)含み組成)を1:1の重量の割合で混合し、これをトルエンとシクロヘキサノンの混合溶媒(混合重量の割合=7:3(トルエン:シクロヘキサノン))に、固形分が約40重量%になるように混合した。次いで、ラジカル開始剤として最大吸収波長が280nm〜320nmの範囲内にある光重合開始剤(Irgacure 907)をRMの固形分の3重量%の割合で配合し、また、最大吸収波長が360nm〜400nmの範囲内にある光重合開始剤(Darocure TPO)をRMの固形分の0.4重量%の割合で配合した。その後、約60℃の温度で1時間程度加熱した後、充分に冷やして均一な溶液を製造した。
PET(poly(ethylene terephtalate))フィルムの一表面に公知のラビング配向膜を形成した後、前記配向膜上に前記製造された液晶組成物をワイヤバーNo.6を使用してコーティングし、100℃で約2分間乾燥させた。その後、紫外線照射装備(TLK40W/10R、Philips社製)を使用して前記コーティング層に、約60℃の温度で350nm〜400nm範囲の波長を有する紫外線を、約100mJ/cm2の光量で照射し、キラル剤の濃度勾配を誘導した。その後、濃度勾配が誘導されたコーティング層に、紫外線照射装備(Fusion UV、400W)でRMの重合が充分に行われるように強い紫外線を1mJ/cm2以上の光量で照射し、厚さが約3μm程度であるTN層を形成した。光学偏光顕微鏡(Leica社製)で確認した結果、前記TN層のねじれ角は、約90度で、図2の202と同一な非線形特性を示した。
紫外線照射装備(TLK40W/10R、Philips社製)を使用し、前記コーティング層に約60℃の温度で350nm〜400nm範囲の波長を有する紫外線を、約100mJ/cm2の光量で照射する過程を省略し、すぐコーティング層に紫外線照射装備(Fusion UV、400W)でRMの重合が充分に行われるように強い紫外線を1mJ/cm2以上の光量で照射し、厚さが約3μm程度である液晶層を形成したこと以外は、実施例1と同一に液晶層を形成した。光学偏光顕微鏡(Leica社製)で確認した結果、前記TN層のねじれ角は、約90度で、図2の201と同一な線形特性を示した。
実施例及び比較例で各々製造された液晶フィルムの液晶層に対して、Axoscan(Axometrics社製)装備を使用して波長分散特性を確認し、その結果を図8に示した。図8のように、実施例と比較例の光学フィルムは、同一なねじれ角を有するが、キラル剤の濃度勾配誘導を通じて非線形グラフ特性を示す実施例1は、いわゆる逆波長分散特性が具現されるが、比較例1の光学フィルムは、正波長特性が具現されていることを確認した。図8で実施例の結果は、R(650)/R(550)が1より大きい場合である。また、このように実施例1の光学フィルムは、逆波長分散特性を通じて1/4波長板または1/2波長板などが要求される多様な用途に適用されて優秀な特性を発揮することができることを確認した。
102:配向層
103:TN層
201:線形グラフ
202:非線形グラフ
401、601:偏光層
402:位相差フィルム
403、602:光学フィルム
6011:吸収型偏光層
6022:反射型偏光層
Claims (20)
- コレステリック配向されたネマチック液晶化合物を含み、
厚さが前記コレステリック配向されたネマチック液晶化合物のピッチ未満であり、ねじれ角が50度〜300度の範囲内にある液晶層を含み、
前記液晶層は、下記数式1を満足する光学フィルム。
(数1)
R(650)/R(550)>R(550)/R(550)>R(450)/R(550)
数式1で、R(650)は、650nm波長の光に対する前記液晶層の面上位相差であり、R(550)は、550nm波長の光に対する前記液晶層の面上位相差であり、R(450)は、450nm波長の光に対する前記液晶層の面上位相差である。 - R(650)/R(550)が1.01〜1.19の範囲内にあり、R(450)/R(550)が0.81〜0.99の範囲内にある請求項1に記載の光学フィルム。
- 液晶層の厚さをX軸とし、該厚さに存在する液晶化合物の光軸と液晶層の最下部(Xが0である位置)に存在する液晶化合物の光軸が成す角度をY軸として図示したグラフが、非線形グラフを示す請求項1または2に記載の光学フィルム。
- グラフは、傾斜が液晶層の厚さの増加に沿って増加する部位を含む請求項3に記載の光学フィルム。
- 液晶層の550nmの波長の光に対する面上位相差が、110nm〜220nmの範囲内または240nm〜350nmの範囲内にある請求項1から4のいずれか1項に記載の光学フィルム。
- 液晶層は、厚さが0.1μm〜10μmの範囲内である請求項1から5のいずれか1項に記載の光学フィルム。
- 液晶層は、キラル剤をさらに含む請求項1から6のいずれか1項に記載の光学フィルム。
- 液晶層の一面に形成される基材層をさらに含む請求項1から7のいずれか1項に記載の光学フィルム。
- 請求項1から8のいずれか1項に記載の光学フィルムと、
前記光学フィルムの一側に配置されている位相差フィルムと、
を含む光学積層体。 - 位相差フィルムの遅相軸と前記光学フィルムの液晶層で前記位相差フィルムと一番隣接して位置されたネマチック液晶化合物の光軸が成す角度が、5度〜90度の範囲内にある請求項9に記載の光学積層体。
- 偏光層をさらに含む請求項9に記載の光学積層体。
- 偏光層、位相差フィルム及び光学フィルムを順次含み、前記偏光層の光吸収軸と前記位相差フィルムの遅相軸が成す角度が、10度〜20度の範囲内にあり、前記位相差フィルムの遅相軸と前記光学フィルムの液晶層で前記位相差フィルムと一番隣接して位置したネマチック液晶化合物の光軸が成す角度が、8度〜16度の範囲内にある請求項9または10に記載の光学積層体。
- 液晶層のねじれ角が、36度〜50度の範囲内にある請求項12に記載の光学積層体。
- 偏光層、位相差フィルム及び光学フィルムを順次含み、前記位相差フィルムの遅相軸と偏光層の光吸収軸は垂直を成し、前記光学フィルムの液晶層で前記位相差フィルムに一番近い液晶化合物の光軸が前記位相差フィルムの遅相軸と成す角度は、50度〜70度の範囲内にある請求項9に記載の光学積層体。
- 液晶層のねじれ角は、10度〜30度の範囲内にある請求項14に記載の光学積層体。
- 偏光層、位相差フィルム及び光学フィルムを順次含み、前記位相差フィルムの遅相軸と偏光層の光吸収軸は、水平であり、前記光学フィルムの液晶層で前記位相差フィルムに一番近い液晶化合物の光軸が前記位相差フィルムの遅相軸と成す角度は、15度〜35度の範囲内にある請求項9に記載の光学積層体。
- 液晶層のねじれ角は、60度〜85度の範囲内にある請求項16に記載の光学積層体。
- ネマチック液晶化合物、キラル剤及び重合開始剤を含む液晶コーティング層に前記キラル剤のコーティング層の厚さによる濃度変化を誘導する段階と、
前記キラル剤の濃度変化が誘発された状態で前記ネマチック液晶化合物を重合させる段階と、
を含む請求項1に記載の光学フィルムの製造方法。 - 濃度変化の誘導及び液晶化合物の重合段階は、紫外線A領域の紫外線を40℃〜80℃の温度で、10mJ/cm2〜500mJ/cm2の光量で液晶コーティング層に照射する過程及び紫外線を0.5J/cm2〜10J/cm2の光量でキラル剤の濃度変化がある液晶コーティング層に照射する過程を含む請求項18に記載の光学フィルムの製造方法。
- 請求項1に記載の光学フィルムまたは請求項9の記載の光学積層体を含むディスプレイ装置。
Applications Claiming Priority (7)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR10-2013-0115216 | 2013-09-27 | ||
KR20130115216 | 2013-09-27 | ||
KR10-2013-0117044 | 2013-09-30 | ||
KR20130117044 | 2013-09-30 | ||
KR10-2014-0129888 | 2014-09-29 | ||
PCT/KR2014/009092 WO2015046983A1 (ko) | 2013-09-27 | 2014-09-29 | 광학 필름 |
KR1020140129888A KR101693080B1 (ko) | 2013-09-27 | 2014-09-29 | 광학 필름 |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2016528543A true JP2016528543A (ja) | 2016-09-15 |
JP6379443B2 JP6379443B2 (ja) | 2018-08-29 |
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TWI547719B (zh) | 2016-09-01 |
US10989850B2 (en) | 2021-04-27 |
TW201523030A (zh) | 2015-06-16 |
CN105408781B (zh) | 2019-04-23 |
JP6379443B2 (ja) | 2018-08-29 |
US20160187554A1 (en) | 2016-06-30 |
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