JP2022529377A - 可変光透過デバイスのための駆動方法 - Google Patents
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Abstract
Description
本願は、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2019年5月7日に出願された米国仮出願第62/844,205号の優先権を主張する。
(a)電気泳動粒子、流体、および流体添加物(例えば、米国特許第7,002,728号および第7,679,814号参照)
(b)カプセル、結合剤、およびカプセル化プロセス(例えば、米国特許第6,922,276号および第7,411,719号参照)
(c)マイクロセル構造、壁材料、およびマイクロセルを形成する方法(例えば、米国特許第7,072,095号および第9,279,906号参照)
(d)マイクロセルを充填およびシールするための方法(例えば、米国特許第7,144,942号および第7,715,088号参照)
(e)電気光学材料を含有するフィルムおよびサブアセンブリ(例えば、米国特許第6,982,178号および第7,839,564号参照)
(f)バックプレーン、接着剤層、および他の補助層、ならびにディスプレイにおいて使用される方法(例えば、米国特許第7,116,318号および第7,535,624号参照)
(g)色形成および色調節(例えば、米国特許第7,075,502号および第7,839,564号参照)
(h)ディスプレイを駆動するための方法(例えば、米国特許第7,012,600号および第7,453,445号参照)
(i)ディスプレイの用途(例えば、米国特許第7,312,784号および第8,009,348号参照)
(j)電気泳動ではないディスプレイ(例えば、米国特許第6,241,921号および米国特許出願公開第2015/0277160号において説明される)、ならびにディスプレイ以外のカプセル化およびマイクロセル技術の用途(例えば、米国特許出願公開第2015/0005720号および第2016/0012710号参照)
加熱、混合、およびpH調節後、結果として生じるカプセルは、冷却され、次いで、30~50μmの平均直径を有する20~60μm直径のサイズ分布を有するカプセルの混合物を生成するために分類された。
上記に説明されるように構築されたデバイスは、デバイスを閉鎖状態から開放状態に切り替えるように設計されたシーケンスに従って、上記に説明される形態の波形を用いて駆動された。この波形は、搬送波形と変調波形との重ね合わせから成っていた。搬送波形は、120Vの振幅および86Hzの周波数を有していた一方、変調波形は、21Vの振幅および1Hzの周波数を有していた。波形は、30秒にわたってデバイスに印加された。例1では、変調波形の振幅は、30秒の印加期間にわたって、5段階で21Vからゼロに低減させられた。経時的に印加された変調振幅が、図1に提供される。例2では、変調波形の振幅は、30秒の印加期間にわたって、30段階で21VからゼロVに減少させられた。例1および例2の両方において、変調波形の振幅の低減は、線形態様で実施された。すなわち、例1では、変調波形の初期振幅(21V)は、6秒(30/5)毎に、4.2V(21/5)ずつ5回、連続して低減させられた。例2では、変調波形の初期振幅(21V)は、1秒(30/30)毎に、0.70V(21/30)ずつ30回、連続して低減させられた。対照的に、比較例Aでは、変調波形は、30秒の印加周期にわたって、21Vで一定であった。波形の印加後、各サンプルは、デバイスの反対側に統合された球体検出器を有する較正された光源の正面に設置された。デバイスを通した光の%総透過率(入射光の強度のパーセントとしての光透過強度)が、決定された。パーセントヘイズも決定され、これは、透過された光を拡散するパーセンテージ、すなわち、2.5°を上回る方位角角度を有する垂直なコリメートされた源からの総透過光と比較して、透過されるときに散乱される光として定義される。パーセントヘイズは、較正されたチョッピングホイールを介して決定された。下記の表1は、3つの波形例の前述の評価から取得される結果を示す。
Claims (20)
- 可変光透過デバイスを動作させる方法であって、
荷電粒子を備える少なくとも1つの電気泳動媒体層を備える可変光透過デバイスを提供することであって、前記電気泳動媒体層は、2つの電極間に配置される、ことと、
前記荷電粒子の移動を引き起こす電場を前記電気泳動媒体層を横断して印加し、初期光学状態から最終光学状態への前記可変光透過デバイスの切替をもたらすことであって、前記最終光学状態は、前記初期光学状態より高いパーセントの光透過を有し、前記印加される電場の波形は、搬送波形と変調波形との重ね合わせであり、前記搬送波形は、振幅V1および周波数ω1を有し、前記変調波形は、初期振幅V2および周波数ω2を有し、V1は、約30V~約180Vであり、ω1は、約50Hz~約1000Hzであり、V2は、約3V~約60Vであり、ω2は、約0.1Hz~約10Hzであり、V1は、V2を上回り、ω1は、ω2を上回り、前記変調波形の振幅は、可変であり、前記可変光透過デバイスへの前記波形の印加の開始時の初期振幅値から前記可変光透過デバイスへの前記波形の印加の完了時の最終振幅値に低減させられる、ことと
を含む、方法。 - 前記変調波形の前記最終振幅値は、ゼロである、請求項1に記載の可変光透過デバイスを動作させる方法。
- 前記変調波形の前記最終振幅値は、0.1V~3Vである、請求項1に記載の可変光透過デバイスを動作させる方法。
- 前記可変光透過デバイスへの前記印加される電場の波形タイプは、方形タイプ、正弦タイプ、三角形タイプ、および鋸歯タイプから成る群から選択される、請求項1に記載の可変光透過デバイスを動作させる方法。
- 前記変調波形は、約80V~約140Vの初期振幅V1および約70Hz~約110Hzの周波数ω1を有する、請求項1に記載の可変光透過デバイスを動作させる方法。
- 前記変調波形は、約10V~約30Vの初期振幅V2および約0.5Hz~約5Hzの周波数ω2を有する、請求項1に記載の可変光透過デバイスを動作させる方法。
- 前記可変光透過デバイスの電気泳動媒体層の荷電粒子は、二酸化チタンを備える、請求項1に記載の可変光透過デバイスを動作させる方法。
- 前記波形の印加の総駆動時間は、約1秒~約100秒である、請求項1に記載の可変光透過デバイスを動作させる方法。
- 前記可変光透過デバイスへの前記波形の印加の開始から前記波形の印加の完了までの総駆動時間は、約5秒~約90秒である、請求項1に記載の可変光透過デバイスを動作させる方法。
- 前記初期振幅値から前記最終振幅値までの前記変調波形の振幅値の低減は、2以上の連続的段階で実施される、請求項1に記載の可変光透過デバイスを動作させる方法。
- 前記初期振幅値から前記最終振幅値までの前記変調波形の振幅値の低減は、5以上の連続的段階で実施される、請求項1に記載の可変光透過デバイスを動作させる方法。
- 前記初期振幅値から前記最終振幅値までの前記変調波形の振幅値の低減は、10以上の連続的段階で実施される、請求項1に記載の可変光透過デバイスを動作させる方法。
- 前記初期振幅値から前記最終振幅値までの前記変調波形の振幅値の低減は、100以上の連続的段階で実施される、請求項1に記載の可変光透過デバイスを動作させる方法。
- 前記可変光透過デバイスの前記最終光学状態の%総透過率は、約30%~約95%である、請求項1に記載の可変光透過デバイスを動作させる方法。
- 前記可変光透過デバイスの前記最終光学状態の%総透過率は、約40%~約90%である、請求項1に記載の可変光透過デバイスを動作させる方法。
- 前記可変光透過デバイスの前記最終光学状態の%ヘイズ率は、約5%~約20%である、請求項1に記載の可変光透過デバイスを動作させる方法。
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