JP2022521042A - 光学素子 - Google Patents
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Abstract
Description
正面位相差(Rin)=dХ(nx-ny)
厚さ方向位相差(Rth)=dХ(nz-ny)
光学素子が意図したモードを具現しているかどうかを確認するため、光学素子の光透過度調節領域を任意に分割し、各領域における透過度を測定した。具体的には、図10に示されたように、光学素子の光透過度調節領域を同一面積の12個の領域に分け、各領域ごとに光透過度を測定した。図10は、光学素子の光透過度調節領域を正面から見た場合を示す。前記光透過度は、Nippon Denshoku社のNDH-5000SPを用いてISO13468規格に基づいて測定した。
製造例1
光変調層として、GH(Guest-Host)液晶層を有する光学フィルムを製造した。一面にITO(Indium Tin Oxide)電極層(図1の120、140)と液晶配向膜(図1には、未図示)が順次形成されている2枚のPC(polycarbonate)フィルム(図1の110、150)を約12μm程度のセルギャップ(cell gap)が維持されるように対向配置した状態で、その間に液晶ホスト(Merck社のMAT-16-969液晶)及び二色性染料ゲスト(BASF社、X12)の混合物を注入し、シーラントで縁部を密封して光学フィルムを作製した。前記PCフィルムの対向配置は、互いに配向膜が形成された面が対向するようにした。前記GH液晶層は、電圧無印加時には水平配向状態であり、電圧印加により垂直配向状態にスイッチングされてもよい。各基材フィルム上に形成された電極層の対向する縁部の電極層として、シーラントが形成された部位を基準に外側に外部電源から光学フィルムに電界を印加できる透過度調節手段(ケイピー社のRV1601-15SP-500及びSMG 1チャンネル5Vリレーモジュール(SZH-EK082))が連結されるように端子161、162を図1のように形成して第2の領域を形成した。このとき、第1の基材フィルム上の電極層上に一つの端子161を形成し、第2の基材フィルム上の電極層上にも一つの端子162を形成した後に、これらが互いに交差するように基材フィルムを配置した(すなわち、図1の第1の基材フィルム上の端子161のうち図面上左側の端子のみを形成し、第2の基材フィルム上の端子162のうち、図面上右側の端子のみを形成した。)。
光変調層として、GH(Guest-Host)液晶層を有する光学フィルムを製造した。一面にITO(Indium Tin Oxide)電極層(図1の120、140)と液晶配向膜(図1には、未図示)が順次形成されている2枚のPC(polycarbonate)フィルム(図1の110、150)を約12μm程度のセルギャップ(cell gap)が維持されるように対向配置した状態で、その間に液晶ホスト(Merck社のMAT-16-969液晶)及び二色性染料ゲスト(BASF社、X12)の混合物を注入し、シーラントで縁部を密封して光学フィルムを作製した。前記PCフィルムの対向配置は、互いに配向膜が形成された面が対向するようにした。前記GH液晶層は、電圧無印加時には水平配向状態であり、電圧印加により垂直配向状態にスイッチングされてもよい。各基材フィルム上に形成された電極層の対向する縁部の電極層として、シーラントが形成された部位を基準に外側に外部電源から光学フィルムに電界を印加できる透過度調節手段(ケイピー社のRV1601-15SP-500及びSMG 1チャンネル5Vリレーモジュール(SZH-EK082))が連結されるように端子161、162を図1のように形成して第2の領域を形成した。このとき、第1の基材フィルム上の電極層上に一つの端子161を形成し、第2の基材フィルム上の電極層上にも一つの端子162を形成した後に、これらが互いに対向するように基材フィルムを配置した(すなわち、図1の第1の基材フィルム上の端子161のうち、図面上右側の端子のみを形成し、第2の基材フィルム上の端子162の中でも図面上右側の端子のみを形成した。)。
光変調層として、GH(Guest-Host)液晶層を有する光学フィルムを製造した。一面にITO(Indium Tin Oxide)電極層(図1の120、140)と液晶配向膜(図1には、未図示)が順次形成されている2枚のPC(polycarbonate)フィルム(図1の110、150)を約12μm程度のセルギャップ(cellgap)が維持されるように対向配置した状態で、その間に液晶ホスト(Merck社のMAT-16-969液晶)及び二色性染料ゲスト(BASF社、X12)の混合物を注入し、シーラントで縁部を密封して光学フィルムを作製した。前記PCフィルムの対向配置は、互いに配向膜が形成された面が対向するようにした。前記GH液晶層は、電圧無印加時には水平配向状態であり、電圧印加により垂直配向状態にスイッチングされてもよい。各基材フィルム上に形成された電極層の対向する縁部の電極層として、シーラントが形成された部位を基準に外側に外部電源から光学フィルムに電界を印加できる透過度調節手段(ケイピー社のRV1601-15SP-500及びSMG 1チャンネル5Vリレーモジュール(SZH-EK082))が連結されるように端子161、162を図1のように形成して第2の領域(A~D領域)を形成した。
製造例1で製造した光学素子の各端子部に外部電源を連結した。このような形態は、図9に示された方式で外部電源が連結された場合と同様である。その後、60Hzスクエア(square)波形の0V~30VのRMS(root mean square)電圧を有する電源を印加し、領域ごとに光透過度を測定し、結果は、表1に示した。
製造例2で製造した光学素子の各端子部に外部電源を連結した。このような形態は、図8に示された方式で外部電源が連結された場合と同様である。その後、60Hzスクエア(square)波形の0V~30VのRMS(root mean square)の電圧を有する電源を印加し、領域ごとに光透過度を測定し、結果は、表1に示した。
製造例3で製造した光学素子の光学フィルムの端子161、162を60Hzスクエア(square)波形の0V~30VのRMS(root mean square)電圧を有する外部電源を印加した。一方、SMG 1チャンネル5Vリレーモジュール(SZH-EK082)を用いて、図8に示された形態及び図9に示された形態を切り替えた。
Claims (16)
- 互いに対向配置された第1及び第2の基材フィルムと、前記第1及び第2の基材フィルムの間に存在する光変調層とを含む光学フィルムを有し、
前記第1及び第2の基材フィルムの互いに対向する面には、それぞれ電極層が形成されており、
前記電極層は、前記光変調層に電界を印加できるように形成された第1の領域と前記第1の領域が前記電界を印加できるように前記電極層を外部電源と連結している第2の領域を含み、
透過度調節手段をさらに含み、前記外部電源は、前記透過度調節手段を介して第2の領域に連結されている、光学素子。 - 前記透過度調節手段は、駆動手段及び電位差調節手段を含む、請求項1に記載の光学素子。
- 前記第1の基材フィルム上の前記第2の領域と前記第2の基材フィルム上の前記第2の領域は、互いに対向しないように配置されている、請求項1または2に記載の光学素子。
- 前記第1の基材フィルム上の電極層の前記第2の領域と前記第2の基材フィルム上の電極層の前記第2の領域は、互いに対向するように配置されている、請求項1または2に記載の光学素子。
- 前記第1の基材フィルム上の前記第2の領域は、前記第1の基材フィルムの対向する縁部にそれぞれ形成されているA及びB領域を含み、前記第2の基材フィルム上の前記第2の領域は、前記第2の基材フィルムの対向する縁部にそれぞれ形成されているC及びD領域を含み、
前記A領域とC領域は、互いに対向し、前記B領域とD領域は、互いに対向し、
前記A及びC領域または前記B及びD領域が外部電源と連結され、前記第1の領域で電界が発生する第1のモードと、前記A及びD領域または前記B及びC領域が外部電源と連結されて前記第1の領域で電界が発生する第2のモードの間をスイッチングできるように形成された、請求項1から4の何れか一項に記載の光学素子。 - 前記第1及び第2の基材フィルム上の前記第2の領域に位置する絶縁層をさらに含む、請求項1から5の何れか一項に記載の光学素子。
- 前記光変調層は、液晶ホスト及び異方性染料ゲストを含み、少なくとも2つの互いに異なる配向状態の間をスイッチングできるアクティブ液晶層である、請求項1から6の何れか一項に記載の光学素子。
- 互いに異なる配向状態は、垂直配向状態と水平配向状態を含む、請求項7に記載の光学素子。
- 偏光層をさらに含む、請求項1から8の何れか一項に記載の光学素子。
- 偏光層をさらに含み、前記偏光層は、前記アクティブ液晶層の水平配向状態の平均光軸と偏光層の光吸収軸がなす角度が80度~100度または35度~55度の範囲内になるように配置されている、請求項8に記載の光学素子。
- 前記第1及び第2の基材フィルムの前記光変調層に向かう面上に存在する配向膜をさらに含む、請求項1から10の何れか一項に記載の光学素子。
- 前記第1及び第2の基材フィルム上の前記配向膜の配向方向のなす角度は、-10度~10度の範囲内または80度~100度の範囲内である、請求項11に記載の光学素子。
- 前記光学フィルムの少なくとも一側に配置された偏光層を含み、前記光学フィルムは、前記第1及び第2の基材フィルムの前記光変調層に向かう面上に存在する配向膜をさらに含み、前記第1及び第2の基材フィルムのうち、前記偏光層に近い基材フィルム上に形成された前記配向膜の配向方向と前記偏光層の光吸収軸のなす角度が80度~90度の範囲内である、請求項1から10の何れか一項に記載の光学素子。
- 対向配置されている2枚の外郭基板をさらに含み、前記光学フィルムは、前記外郭基板の間に存在する、請求項1から13の何れか一項に記載の光学素子。
- 前記光学フィルムは、2枚の外郭基板の間でカプセル化剤により全面がカプセル化されている、請求項14に記載の光学素子。
- 一つ以上の開口部が形成されている車体と、前記開口部に装着された請求項1から15の何れか一項の光学素子を含む、自動車。
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