JP2016509966A - 液晶レンズ用配向フィルム及びこれを形成するための金型 - Google Patents
液晶レンズ用配向フィルム及びこれを形成するための金型 Download PDFInfo
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Images
Classifications
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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
- G02F1/1337—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers
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- B29C33/00—Moulds or cores; Details thereof or accessories therefor
- B29C33/42—Moulds or cores; Details thereof or accessories therefor characterised by the shape of the moulding surface, e.g. ribs or grooves
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C59/00—Surface shaping of articles, e.g. embossing; Apparatus therefor
- B29C59/02—Surface shaping of articles, e.g. embossing; Apparatus therefor by mechanical means, e.g. pressing
- B29C59/04—Surface shaping of articles, e.g. embossing; Apparatus therefor by mechanical means, e.g. pressing using rollers or endless belts
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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
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- G02F1/1337—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers
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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
- G02F1/13378—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers by treatment of the surface, e.g. embossing, rubbing or light irradiation
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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
- G02F1/13378—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers by treatment of the surface, e.g. embossing, rubbing or light irradiation
- G02F1/133784—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers by treatment of the surface, e.g. embossing, rubbing or light irradiation by rubbing
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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
- G02F1/29—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 position or the direction of light beams, i.e. deflection
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C59/00—Surface shaping of articles, e.g. embossing; Apparatus therefor
- B29C59/02—Surface shaping of articles, e.g. embossing; Apparatus therefor by mechanical means, e.g. pressing
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- Nonlinear Science (AREA)
- Optics & Photonics (AREA)
- General Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Mathematical Physics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Liquid Crystal (AREA)
- Shaping Of Tube Ends By Bending Or Straightening (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
Description
フォトリソグラフィ工程と乾式蝕刻工程を利用して、ピッチ8μm、幅2μm及び高さ3.5μmの線型格子石英基材を形成し、2mTorr、C4F8 = 30sccm、ICP:RF = 1000:50Wの条件で、乾式蝕刻工程を通じて、ピッチ8μm、幅2μm及び高さ2.5μmのパターンマスターモールドを各々製作した。以後、石英基材に1重量%で希釈されたフッ素化シラン(Fluorinated silane)(OPTOOLTM、Daikin Industires、LTD.) 溶液をスピンコーティングを通じて塗布し、120°Cで30分間乾燥させて離型処理を進行し、紫外線硬化用PUV(Poly urethane acrylate)(SRMO4、MINUTA Technology co., LTD.)をパターン面にスピンコーティング方法で(500rpm、30秒)塗布した後、180μm厚さのPET記載をラミネートして紫外線の照射(100W/cm−2、120秒)を通じて硬化及び離型を実施してパターンを複製することでモールドを製造した。
実施例1の2次ホットエンボシング工程で、凸レンズ基盤のレンチキュラーレンズ形状の代わりに、フレネルレンズ形状のモールド(機械加工)でホットエンボシング工程を進行したこと以外は、実施例1と同一な方法で配向フィルムを製造した。
実施例2の配向フィルムの製造方法において、支持層303の素材としてTiO2ゾル−ゲルの前駆体の代わりにポリビニルピロリドン高分子を使用した。
実施例1と同一な方法でモールドを製造するが、超微細突起部を形成するため、ナノ線格子構造、すなわち、幅が約75nm程度、ピッチが約150nm程度及び高さが150nm程度のパターンをマスターモールドで使用して形状を複製して製造した。
実施例4で製作した配向フィルム(110mm×110mm)の液晶配向用突起部が形成された面に、真空蒸着及びスパッタリング方法で、銅−コバルト(Cu−Co)を約0.015μmの厚さで蒸着し、電気メッキ(electro deposition)方法を通じて銅を約800μmの厚さでメッキした。最終的に、前記配向フィルムを除去して配向フィルムの微細形状が複製された電鋳金型を製作した。図14は、液晶配向用突起部が刻印されたフレネルレンズアレイ形状の金型のイメージを示す。
<液晶配向テスト>
実施例4で製作した配向フィルム上部の凹の曲面の上部に液晶高分子を満たして液晶層を形成し、上部基材で前記液晶層を密封する形態で液晶シートを製作した。この時、上部基材にも下部のレンズ形状の液晶層に形成された配向パターンと同一な方向への配向膜を導入した。
フレネルレンズに液晶配向用突起部がないレンズフィルムを製作して実施例6と同一な工程で液晶配向テスト用サンプルを製作した。図15は、実施例6と比較例1を通じて製造した各々の液晶フィルムを光軸が互いに交差された二つの偏光板の間に置いて配向特性を確認した写真である。すなわち、液晶配向用突起部の有無による液晶配向程度を示すことで、フレネルレンズにナノサイズの突起部があるフィルムの場合、優秀な液晶配向特性を示す。
101:非平面(レンズ形状)
102:金型の突起部
103:溝
200:配向フィルム
201:非平面(レンズ形状)
202:配向フィルムの突起部
301:保護フィルム
302:平面上の被転写層
303:支持層
304:液晶物質
500:ロールツーロール工程
501:ロール
Claims (26)
- 一つ以上の非平面上に形成されており、液晶配向能を示すことができる寸法を有する突起部を含む転写パターンを有することを特徴とする液晶配向フィルム形成用金型。
- 非平面は、レンズ形状に形成されていることを特徴とする請求項1に記載の金型。
- 非平面は、レンズ形状が一方向に延長される形態を有することを特徴とする請求項2に記載の金型。
- レンズ形状は、凸レンズ形状、凹レンズ形状またはフレネルレンズ形状を示すことを特徴とする請求項2に記載の金型。
- 突起部の幅は、0.05μm〜10μmの範囲内にあることを特徴とする請求項1に記載の金型。
- 突起部のピッチは、0.05μm〜20μmの範囲内にあることを特徴とする請求項1に記載の金型。
- 突起部の高さは、0.01μm〜5μmの範囲内にあることを特徴とする請求項1に記載の金型。
- 非平面は、一方向に延長されるレンズ形状を有し、突起部は、前記レンズ形状の延長方向と0度〜90度の範囲内のいずれか一つの角度を成す線形状に形成されていることを特徴とする請求項1に記載の金型。
- 非平面が外部に存在する状態のロール形状に形成されていることを特徴とする請求項1に記載の金型。
- 一つ以上の非平面上に液晶配向能を示すことができる寸法の突起部を含む液晶配向パターンが形成されていることを特徴とする液晶配向フィルム。
- 非平面は、レンズ形状に形成されていることを特徴とする請求項10に記載の液晶配向フィルム。
- 非平面は、レンズ形状が一方向に延長される形態を有することを特徴とする請求項11に記載の液晶配向フィルム。
- レンズ形状は、凸レンズ形状、凹レンズ形状またはフレネルレンズ形状を示すことを特徴とする請求項11に記載の液晶配向フィルム。
- 突起部の幅は、0.05μm〜10μmの範囲内にあることを特徴とする請求項10に記載の液晶配向フィルム。
- 突起部のピッチは、0.05μm〜20μmの範囲内にあることを特徴とする請求項10に記載の液晶配向フィルム。
- 突起部の高さは、0.01μm〜5μmの範囲内にあることを特徴とする請求項10に記載の液晶配向フィルム。
- 非平面は、一方向に延長されるレンズ形状を有し、突起部は、前記レンズ形状の延長方向と0度〜90度の範囲内のいずれか一つの角度を成す線形状に形成されていることを特徴とする請求項10に記載の液晶配向フィルム。
- 平面上の被転写層に液晶配向能を示すことができる寸法を有する突起部を含むパターンを形成し、前記パターンが形成されている被転写層の表面を非平面に形成する工程を含むことを特徴とする液晶配向フィルムの製造方法。
- 非平面で形成する前に、パターン上に支持層を形成する工程をさらに含むことを特徴とする請求項18に記載の製造方法。
- 非平面で形成した後に支持層を除去する工程をさらに含むことを特徴とする請求項19に記載の製造方法。
- 請求項1に記載の金型の転写パターンを被転写体上に転写させる工程を含むことを特徴とする液晶配向フィルムの製造方法。
- 平面上の被転写層に液晶配向能を示すことができる寸法を有する突起部を含むパターンを形成し、前記パターンが形成されている被転写層の表面を非平面で形成した後に、前記非平面の形態を被転写体に転写させる工程を含むことを特徴とする金型の製造方法。
- 請求項10に記載の配向フィルムの非平面上に液晶物質を注入して液晶層を形成する工程を含むことを特徴とする液晶フィルムの製造方法。
- 液晶層上に配向膜を形成する工程を含むことを特徴とする請求項23に記載の液晶フィルムの製造方法。
- 配向膜は、微細線形パターン配向工程、光配向工程またはラビング配向工程で形成することを特徴とする請求項24に記載の液晶フィルムの製造方法。
- 配向膜は、液晶配向能を示すことができ、前記配向膜の配向方向が下部の液晶層の突起部の整列方向と対応するように形成されていることを特徴とする請求項24に記載の液晶フィルムの製造方法。
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