JP2019537061A - 空間可変液晶回折格子 - Google Patents
空間可変液晶回折格子 Download PDFInfo
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- JP2019537061A JP2019537061A JP2019525969A JP2019525969A JP2019537061A JP 2019537061 A JP2019537061 A JP 2019537061A JP 2019525969 A JP2019525969 A JP 2019525969A JP 2019525969 A JP2019525969 A JP 2019525969A JP 2019537061 A JP2019537061 A JP 2019537061A
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Nonlinear Science (AREA)
- Crystallography & Structural Chemistry (AREA)
- Chemical & Material Sciences (AREA)
- Mathematical Physics (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Spectroscopy & Molecular Physics (AREA)
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- Liquid Crystal (AREA)
- Optical Elements Other Than Lenses (AREA)
Abstract
Description
本願は、米国仮特許出願第62/424,310号(2016年11月18日出願、名称「SPATIALLY VARIABLE LIQUID CRYSTAL DIFFRACTION GRATINGS」)に対する優先権の利益を主張し、上記出願の内容は、その全体が参照により本明細書に引用される。
本開示は、ディスプレイシステムに関し、より具体的には、拡張現実ディスプレイシステムに関する。
現代のコンピューティングおよびディスプレイ技術は、いわゆる「仮想現実」または「拡張現実」体験のためのシステムの開発を促進しており、デジタル的に再現された画像またはその一部が、現実であるように見える、もしくはそのように知覚され得る様式でユーザに提示される。仮想現実、すなわち、「VR」シナリオは、典型的には、他の実際の実世界の視覚的入力に対する透過性を伴わずに、デジタルまたは仮想画像情報の提示を伴い、拡張現実または「AR」シナリオは、典型的には、ユーザの周囲の実際の世界の可視化に対する拡張としてのデジタルまたは仮想画像情報の提示を伴う。複合現実または「MR」シナリオは、一種のARシナリオであり、典型的には、自然世界の中に統合され、それに応答する仮想オブジェクトを伴う。例えば、MRシナリオでは、AR画像コンテンツは、実世界内のオブジェクトによってブロックされて見える、または別様にそれと相互作用するように知覚され得る。
故に、多数のデバイス、システム、構造、および方法が、本明細書に開示される。例えば、例示的回折格子が、光回折のために適合された格子周期に対応する周期的に反復する側方寸法を有する複数の異なる回折ゾーンを含むように開示される。回折格子は、加えて、異なる回折ゾーンに対応する複数の異なる液晶層を含む。異なる液晶層は、異なる回折ゾーンが光回折に関連付けられた異なる光学性質を有するように、異なるように整合された液晶分子を有する。
ARシステムは、依然として、ユーザがその周囲の世界を見えることを可能にしながら、仮想コンテンツをユーザまたは視認者に表示し得る。好ましくは、本コンテンツは、例えば、アイウェアの一部として、画像情報をユーザの眼に投影する、頭部搭載型ディスプレイ上に表示される。加えて、ディスプレイはまた、周囲環境からの光をユーザの眼に透過し、その周囲環境のビューをもたらし得る。本明細書で使用されるように、「頭部搭載型」ディスプレイは、視認者の頭部上に搭載され得る、ディスプレイであることを理解されたい。
(空間可変液晶回折格子)
(光整合された空間可変液晶回折格子)
(空間可変液晶材料に基づく空間可変液晶回折格子)
(追加の実施例)
Claims (20)
- 回折格子であって、前記回折格子は、
光回折のために適合された格子周期に対応する周期的に反復する側方寸法を有する複数の異なる回折ゾーンと、
前記異なる回折ゾーンに対応する複数の異なる液晶層と
を備え、
前記異なる液晶層は、異なるように整合された液晶分子を有し、それによって、前記異なる回折ゾーンは、光回折に関連付けられた異なる光学性質を有する、回折格子。 - 前記光学性質は、屈折率、吸収係数、回折効率および複屈折のうちの1つ以上のものを含む、請求項1に記載の回折格子。
- 前記異なる液晶層の各々は、複数の異なるように配列された領域を有し、前記異なるように配列された領域は、互いに対して異なるように整合された液晶分子を有する、請求項1に記載の回折格子。
- 前記異なる回折ゾーンの各々は、基板と前記対応する液晶層との間に挿入された整合層をさらに備え、前記異なる回折ゾーンと前記基板との間の異なる整合層は、同一材料組成から形成され、前記異なる整合層は、前記液晶分子が前記異なる回折ゾーン内で異なるように整合されるようにする、請求項1に記載の回折格子。
- 前記液晶分子は、伸長され、伸長方向に沿って整合されたカラミチック液晶分子を備えている、請求項1に記載の回折格子。
- 前記異なる液晶層の各々は、第1の領域と、第2の領域とを含み、前記第1の領域の液晶分子は、第1の整合方向に沿って整合され、前記第1の整合方向は、基準方向に対して第1の整合角度を形成し、前記第2の領域の液晶分子は、第2の整合方向に沿って整合され、前記第2の整合方向は、前記基準方向に対して第2の整合角度を形成し、前記第2の整合角度は、前記第1の整合角度と異なる、請求項1に記載の回折格子。
- 第1の液晶層の第1の領域の液晶分子と第2の液晶層の対応する第1の領域の液晶分子とは、実質的に同一の整合角度を有する、請求項6に記載の回折格子。
- 前記第1の液晶層の第2の領域の液晶分子と前記第2の液晶層の対応する第2の領域の液晶分子とは、異なる整合角度を有する、請求項7に記載の回折格子。
- 第1の液晶層の第1の領域の液晶分子と第2の液晶層の対応する第1の領域の前記液晶分子とは、実質的に異なる整合角度を有し、前記第1の液晶層の第2の領域の液晶分子と前記第2の液晶層の対応する第2の領域の液晶分子とは、異なる整合角度を有する、請求項6に記載の回折格子。
- 前記第1の領域と前記第2の領域との間の側方幅の比率は、異なる回折ゾーン間で実質的に同一である、請求項6に記載の回折格子。
- 第1の液晶層の第2の領域の液晶分子と第2の液晶層の第2の領域の液晶分子とは、実質的に同一の整合角度を有し、前記第1の領域と前記第2の領域との間の側方幅の比率は、異なる回折ゾーン間で実質的に異なる、請求項6に記載の回折格子。
- 第1の液晶層の第2の領域の液晶分子と第2の液晶層の第2の領域の液晶分子とは、異なる整合角度を有し、前記第1の領域と前記第2の領域との間の側方幅の比率は、異なる回折ゾーン間で実質的に異なる、請求項6に記載の回折格子。
- 前記第1および第2の整合角度は、事前傾斜角度であり、前記事前傾斜角度は、基板の主要表面と垂直な平面内で、それぞれの整合方向と前記主要表面との間で測定される、請求項6に記載の回折格子。
- 前記第1および第2の整合角度は、方位角であり、前記方位角は、基板の主要表面と平行な平面内で、それぞれの整合方向と、前記主要表面と平行な基準方向との間で測定される、請求項6に記載の回折格子。
- 前記異なる液晶層は、第1の領域と、第2の領域とを含み、前記第1の領域の液晶分子は、複数の第1の整合方向に沿って整合され、前記複数の第1の整合方向は、基準方向に対して複数の第1の整合角度を形成し、前記第2の領域の液晶分子は、複数の第2の整合方向に沿って整合され、前記複数の第2の整合方向は、前記基準方向に対して複数の第2の整合角度を形成する、請求項3に記載の回折格子。
- 前記回折格子は、透明基板を有する透過回折格子である、請求項1に記載の回折格子。
- 回折格子であって、前記回折格子は、側方方向に延びている複数の連続的な液晶層を備え、前記複数の連続的な液晶層は、周期的に反復する側方寸法、厚さ、および屈折率を有するように配列され、それによって、前記液晶層は、光を回折するように構成され、
前記液晶層の液晶分子は、前記側方方向に沿って異なる液晶層において異なるように配列され、それによって、前記連続的な液晶層は、回折効率において勾配を有する光を回折するように構成されている、回折格子。 - 前記液晶層は、第1の領域と、第2の領域とを有し、前記連続的な液晶層は、複数の第1の領域と複数の第2の領域とが前記側方方向に交互するように配列されている、請求項17に記載の回折格子。
- 前記第1の領域内の液晶分子は、実質的に同一の整合配向を有する一方、前記第2の領域内の液晶分子は、実質的に異なる整合配向を有する、請求項18に記載の回折格子。
- 光をユーザの眼に投影することによって拡張現実画像コンテンツを表示するように構成された頭部搭載型ディスプレイデバイスであって、前記頭部搭載型ディスプレイデバイスは、
ユーザの頭部上に支持されるように構成されたフレームと、
前記フレーム上に配置されたディスプレイと
を備え、
前記ディスプレイの少なくとも一部は、1つ以上の導波管を備え、前記1つ以上の導波管は、透明であり、前記1つ以上の導波管は、前記ユーザが前記頭部搭載型ディスプレイデバイスを装着しているとき、前記ユーザの眼の正面の場所に配置され、それによって、前記透明部分は、前記ユーザの正面の環境の一部からの光をユーザの眼に透過させ、前記ユーザの正面の前記環境の前記部分のビューを提供し、前記ディスプレイは、1つ以上の光源と、少なくとも1つの回折格子とをさらに備え、前記少なくとも1つの回折格子は、前記光源からの光を前記1つ以上の導波管の中に結合すること、または、光を前記1つ以上の導波管から外に結合することを行うように構成され、前記回折格子は、
光回折のために適合された格子周期に対応する周期的に反復する側方寸法を有する複数の異なる回折ゾーンと、
前記異なる回折ゾーンに対応する複数の異なる液晶層と
を備え、
前記異なる液晶層は、異なるように整合された液晶分子を有し、それによって、前記異なる回折ゾーンは、光回折に関連付けられた異なる光学性質を有する、頭部搭載型ディスプレイデバイス。
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