JP2022525165A - ホログラフィック導波管バックライトおよび関連する製造方法 - Google Patents
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- G02B6/0066—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 characterised by the light source being coupled to the light guide
- G02B6/0068—Arrangements of plural sources, e.g. multi-colour light sources
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- 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
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Abstract
Description
本願は、第35 U.S.C. § 119(e)号に基づいて、2019年3月12日に出願され、「Holographic Waveguide Backlight」と題された、米国仮特許出願第62/817,468号の利益および優先権を主張する。米国仮特許出願第62/817,468号の開示は、あらゆる目的のために、参照することによってその全体として本明細書に組み込まれる。
(光学導波管および格子構造)
(光学記録材料系)
・R. L. Sutherland et al., Chem. Mater. 5, 1533 (1993)(その開示は、参照することによって本明細書に組み込まれる)は、アクリレートポリマーおよび界面活性剤の使用を説明している。具体的には、レシピは、架橋多官能性アクリレートモノマー、連鎖延長剤N-ビニルピロリジノン、LC E7、光開始剤ローズベンガル、および共開始剤N-フェニルグリシンを含む。界面活性剤オクタン酸が、ある変形において添加された。
・Fontecchio et al., SID 00 Digest 774-776, 2000(その開示は、参照することによって本明細書に組み込まれる)は、多官能性アクリレートモノマー、LC、光開始剤、共開始剤、および連鎖停止剤を含む、反射型ディスプレイ用途のためのUV硬化性HPDLCを説明している。
・Y.H. Cho, et al., Polymer International, 48, 1085-1090, 1999(その開示は、参照することによって本明細書に組み込まれる)は、アクリレートを含むHPDLCレシピを開示している。
・Karasawa et al., Japanese Journal of Applied Physics, Vol. 36, 6388-6392, 1997(その開示は、参照することによって本明細書に組み込まれる)は、種々の官能状態のアクリレートを説明している。
・T.J. Bunning et al., Polymer Science: Part B: Polymer Physics, Vol. 35, 2825- 2833, 1997(その開示は、参照することによって本明細書に組み込まれる)もまた、多官能性アクリレートモノマーを説明している。
・G.S. Iannacchione et al., Europhysics Letters Vol. 36 (6). 425-430, 1996(その開示は、参照することによって本明細書に組み込まれる)は、ペンタアクリレートモノマーと、LCと、連鎖延長剤と、共開始剤と、光開始剤とを含む、PDLC混合物を説明している。
アクリレートは、迅速な動態、他の材料との良好な混合、およびフィルム形成プロセスとの適合性の利益をもたらす。アクリレートは、架橋されるため、それらは、機械的にロバストかつ可撓性である傾向がある。例えば、官能性2(ジ)および3(トリ)のウレタンアクリレートが、HPDLC技術に関して広範に使用されている。ペンタおよびヘキサ官能性ステム等のより高い官能性の材料もまた、使用されることができる。
(材料組成の変調)
回折効率を変動させるために材料内の液晶濃度を変動させることに加えて、別の技法は、導波管セルの厚さを変動させるステップを含む。これは、スペーサの使用を通して遂行されることができる。多くの実施形態では、スペーサは、導波管セルの構築の間に構造支持のために光学記録材料全体を通して分散される。いくつかの実施形態では、異なるサイズのスペーサが、光学記録材料全体を通して分散される。スペーサは、光学記録材料の層の1つの方向を横断して昇順サイズで分散されることができる。導波管セルが、積層を通して構築されるとき、基板は、光学記録材料を挟装し、様々なサイズのスペーサからの構造支持を用いて、光学記録材料の楔形層を作成する。様々なサイズのスペーサが、上記に説明される変調プロセスと同様に分散されることができる。加えて、スペーササイズを変調することは、材料組成の変調と組み合わせられることができる。いくつかの実施形態では、それぞれ、異なるサイズのスペーサとともに懸濁されるHPDLC材料のリザーバが、方略的に分散される様々なサイズのスペーサとともにHPDLC材料の層を印刷し、楔形導波管セルを形成するために使用される。いくつかの実施形態では、スペーササイズ変調は、異なるサイズのスペーサの数および使用される異なる材料の数の積に等しい、いくつかのリザーバを提供することによって、材料組成変調と組み合わせられる。例えば、一実施形態では、インクジェット印刷ヘッドは、2つの異なるスペーササイズを伴う様々な濃度の液晶を印刷するように構成される。そのような実施形態では、4つのリザーバ、すなわち、第1のサイズのスペーサを伴う液晶なしの混合物懸濁液、第2のサイズのスペーサを伴う液晶なしの混合物懸濁液、第1のサイズのスペーサを伴う液晶が豊富な混合物懸濁液、および第2のサイズのスペーサを伴う液晶が豊富な混合物懸濁液が、調製されることができる。材料変調に関するさらなる議論が、2018年11月18日に出願され、「Systems and Methods for Manufacturing Waveguide Cells」と題された、米国出願第16/203,071号に見出されることができる。米国出願第16/203,491号の開示は、あらゆる目的のために、参照することによってその全体として本明細書に組み込まれる。
(導波管バックライト)
(均等論)
Claims (27)
- 光学照明デバイスであって、
照明を抽出するための上面および下面を伴う光誘導構造と、
前記光誘導構造に光学的に結合され、偏光を提供するように構成される光源であって、光は、前記光誘導構造内で全内部反射を受ける、光源と、
前記光誘導構造から光を抽出するために、少なくとも1つの格子層内に配置される少なくとも1つの複数の格子要素と
を備える、光学照明デバイス。 - 前記光源は、少なくとも第1および第2の波長のコリメート光色を順次放出するように構成され、前記少なくとも1つの複数の格子要素は、前記第1の波長の光を、前記光誘導構造から外へ出力経路の第1のセットの中に回折させるための第1の複数の格子要素と、前記第2の波長の光を、前記光誘導構造から外へ前記出力経路の第1のセットと実質的に重複する出力経路の第2のセットの中に回折させるための第2の複数の格子要素とを備える、請求項1に記載の光学照明デバイス。
- 前記上面に上置するクリア領域が点在する半波長遅延領域を有する基板をさらに備え、各前記半波長遅延領域は、前記第1および第2の複数の格子要素のそれぞれにおける少なくとも1つの格子要素と重複し、各前記クリア領域は、前記第1および第2の複数の格子要素のそれぞれにおける少なくとも1つの格子要素と重複する、請求項2に記載の光学照明デバイス。
- 配置される4分の1波長遅延層をさらに備え、前記4分の1波長遅延層は、前記下面に近接して配置される第1の表面と、反射面とを有する、請求項2に記載の光学照明デバイス。
- 前記第1の複数の格子要素は、前記第2の複数の格子要素に対して別個の格子層内に配置され、前記第1の波長の光を回折させるための格子要素は、前記第2の波長の光を回折させるための格子要素と重複する、請求項2に記載の光学照明デバイス。
- 第1および第2の波長の光を回折させるための格子要素は、1つの層内に均一に点在する第1および第2の多数の格子要素として配置される、請求項2に記載の光学照明デバイス。
- 第1および第2の波長の光を回折させるための格子要素は、2つの層内に均一に点在する第1および第2の多数の格子要素として配置され、第1の波長の光を回折させるための格子要素は、第2の波長の光を回折させるための格子要素と重複する、請求項2に記載の光学照明デバイス。
- 第1の波長の光を回折させるための格子要素は、第1の格子ベクトルを有し、第2の波長の光を回折させるための格子要素は、前記第1の格子ベクトルと反対の方向における第2の格子ベクトルを有する、請求項2に記載の光学照明デバイス。
- 第1の波長の光を回折させるための格子要素および第2の波長の光を回折させるための格子要素は、略平行な方向に整合される格子ベクトルを有する、請求項2に記載の光学照明デバイス。
- 第1の波長の光を回折させるための格子要素および第2の波長の光を回折させるための格子要素は、相互に対してオフブラッグである、請求項2に記載の光学照明デバイス。
- 第1の波長の光を回折させるための格子要素は、第1の格子ベクトルを有する格子要素および前記第1の格子ベクトルと反対の方向における第2の格子ベクトルを有する格子要素が均一に点在する第1の層内に配置され、第2の波長の光を回折させるための格子要素は、第1の格子ベクトルを有する格子要素および前記第1の格子ベクトルと反対の方向における第2の格子ベクトルを有する格子要素が点在する第2の層内に配置される、請求項2に記載の光学照明デバイス。
- 前記第1の波長の光は、第1の偏光を有し、前記第2の波長の光は、前記第1の偏光に直交する第2の偏光を有する、請求項2に記載の光学照明デバイス。
- 前記第1の波長の光および前記第2の波長の光は、同一の偏光を有する、請求項2に記載の光学照明デバイス。
- 第1および第2の波長の光を回折させるための格子要素は、単一の層内に多重化される第1および第2の多数の格子要素として配置され、前記第1の波長を回折させるための格子要素は、前記第2の波長の光を回折させるための格子要素と多重化される、請求項2に記載の光学照明デバイス。
- 第1および第2の波長の光を回折させるための格子要素は、2つの接触層のスタックにおける第1および第2の多数の格子要素として配置され、前記第1の波長の光を回折させるための格子要素は、前記第2の波長の光を回折させるための格子要素と重複する、請求項2に記載の光学照明デバイス。
- 前記第1の複数の格子要素は、前記光源が、前記第1の波長の光を放出すると、回折状態に切り替えられ、前記第2の複数の格子要素は、前記光源が、前記第2の波長の光を放出すると、回折状態に切り替えられる、請求項2に記載の光学照明デバイス。
- 前記出力経路は、角度的に分離される、請求項2に記載の光学照明デバイス。
- 前記出力経路は、前記上面に対して略法線である、請求項2に記載の光学照明デバイス。
- 前記少なくとも1つの複数の格子要素は、少なくとも1つの格子層内に配置され、前記光誘導構造は、少なくとも1つの導波管を備え、各前記導波管は、前記格子層のうちの少なくとも1つを支持する、請求項1に記載の光学照明デバイス。
- 前記層は、透明基板の間に形成され、透明伝導性コーティングが、各前記基板に適用され、前記コーティングのうちの少なくとも1つは、前記格子要素と重複する独立してアドレス指定可能な要素にパターン化され、各前記格子要素を横断して電圧を印加するように動作可能な電気制御回路が、提供される、請求項1に記載の光学照明デバイス。
- 各前記格子要素は、平面ブラッグ表面、屈折力、光学遅延、拡散性質、空間的に変動する回折効率、前記格子要素を横断して印加される電圧に比例する回折効率、および前記格子要素を横断して印加される電圧に比例する位相遅延から成る群から選択される少なくとも1つの性質を備える、請求項1に記載の光学照明デバイス。
- 前記少なくとも1つの複数の格子要素は、2次元アレイを備える、請求項1に記載の光学照明デバイス。
- 前記少なくとも1つの複数の格子要素は、伸長要素の1次元アレイを備える、請求項1に記載の光学照明デバイス。
- 各前記格子要素は、ホログラフィックポリマー分散液晶内に記録される、請求項1に記載の光学照明デバイス。
- 前記光は、格子またはプリズムによって前記光誘導構造の中に結合される、請求項1に記載の光学照明デバイス。
- 前記光源は、レーザまたはLEDである、請求項1に記載の光学照明デバイス。
- ビーム偏向器、ダイクロイックフィルタ、マイクロレンズアレイ、ビーム成形器、光積分器、および偏光回転子から成る群から選択される少なくとも1つの構成要素をさらに備える、請求項1に記載の光学照明デバイス。
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2020
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- 2020-03-12 EP EP20769981.0A patent/EP3938821A4/en active Pending
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- 2020-03-12 JP JP2021555283A patent/JP2022525165A/ja active Pending
- 2020-03-12 US US16/817,524 patent/US20200292745A1/en not_active Abandoned
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- 2020-12-16 US US17/124,269 patent/US11378732B2/en active Active
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Also Published As
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KR20210134763A (ko) | 2021-11-10 |
US11378732B2 (en) | 2022-07-05 |
EP3938821A4 (en) | 2023-04-26 |
CN113728258A (zh) | 2021-11-30 |
EP3938821A1 (en) | 2022-01-19 |
US20200292745A1 (en) | 2020-09-17 |
US20220404538A1 (en) | 2022-12-22 |
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WO2020186113A1 (en) | 2020-09-17 |
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