JP2014186357A - 誘電泳動力を用いて電気泳動ディスプレイを駆動する方法 - Google Patents
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- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
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- G02F1/167—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 translational movement of particles in a fluid under the influence of an applied field characterised by the electro-optical or magneto-optical effect by electrophoresis
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- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
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- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
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- G02F1/165—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 translational movement of particles in a fluid under the influence of an applied field
- G02F1/1675—Constructional details
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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
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- G09G2320/02—Improving the quality of display appearance
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Abstract
【解決手段】誘電泳動ディスプレイは、複数の中間周波数状態を経由して低周波数閉状態から高周波数開状態へ転換され、そのような複数の周波数ステップの使用は、遷移中のフリッカを減少させる。誘電泳動ディスプレイの第2のタイプは、光透過電極を有し、それを通って誘電泳動媒体が見られ得、導体は、いくつかの点において光透過電極に接続され、光透過電極内の電圧変化を減少させ得る。
【選択図】図3
Description
(a)米国特許第7,116,466号と、
(b)米国特許出願公開第2006/0038772号と、
(c)米国特許出願公開第2005/0213191号と、
(b)米国特許第7,259,744号と、
(c)米国特許第7,193,625号と
に関する。
Japan,2001,Paper AMD4−4)を参照されたい。また特許文献2;欧州特許出願第1,462,847号;同第1,482,354号;同第1,484,635号;同第1,500,971号;同第1,501,194号;同第1,536,271号;同第1,542,067号;同第1,577,702号;同第1,577,703号;および同第1,598,694号;ならびに特許文献3;特許文献4;および特許文献5を参照されたい。そのような気体ベース電気泳動媒体は、例えば媒体が垂直面に配置される符号においてそのような定着を許容する配向に媒体が用いられる場合、液体ベース電気泳動媒体と同じ種類の、粒子定着による問題を受けやすいように見える。実際に粒子定着は、液体ベース電気泳動媒体におけるより気体ベース電気泳動媒体において深刻な問題であるように見える。なぜなら液体懸濁流体と比較して気体懸濁流体の低い粘性は、電気泳動粒子をより急速に定着させるからである。
流体と流体内に複数の少なくとも1種類の粒子とを備えている誘電泳動媒体を提供することと、
第1の周波数を有する電界を媒体に印加し、それによって粒子が電気泳動動作を受けるようにして、第1の光学状態を生成することと、
第1の周波数より高い第2の周波数を有する少なくとも1つの電界を媒体に印加して、それによって粒子が誘電泳動動作を受けるようにすることと、
第2の周波数より高い第3の周波数を有する電界を媒体に印加して、それによって粒子が誘電泳動動作を受けるようにし、第1の光学状態とは異なる第2の光学状態を生成することと
を包含する。
流体と流体内に複数の少なくとも1種類の粒子とを備えている誘電泳動媒体と、
誘電泳動媒体に電界を印加するように配置された少なくとも1つの電極と、
少なくとも1つの電極によって印加される電界を制御する電界制御手段であって、電界制御手段は、第1の周波数を有する電界であって、粒子が電気泳動動作を受け第1の光学状態を生成するようにする、電界と、第1の周波数より高い第2の周波数を有する少なくとも1つの電界であって、粒子が誘電泳動動作を受けるようにする、電界と、第2の周波数より高い第3の周波数を有する電界であって、粒子が誘電泳動動作を受けるようにし、第1の光学状態とは異なる第2の光学状態を生成する、電界とを印加するように配置された、電界制御手段と
を備えている誘電泳動ディスプレイを提供する。本発明のディスプレイは、電界制御手段が第1の周波数電界と第3の周波数との間に複数の中間周波数電界を印加するように配置され、その結果、遷移範囲内(本明細書において定義されるように)において、連続する印加された電界間のどの周波数ステップも第1の周波数と第3の周波数との間の合計周波数差の10パーセントを超えないことを特徴とする。
流体と流体内に複数の少なくとも1種類の粒子とを備え、粒子は、誘電泳動媒体に電界を印加時に流体を通って可動である、誘電泳動媒体と、
誘電泳動媒体が光透過電極を通って見られ得るように、誘電泳動媒体に隣接して配置された少なくとも1つの光透過電極と、
光透過電極から電源に延びる導体であって、導体は光透過電極よりも高い導電率を有し、導体が少なくとも2つの間隔を置かれた点において光透過電極と接触することを特徴とする、導体と
を備えている誘電泳動ディスプレイを提供する。
以下に説明される理由により、導体の導電率は重要であり、多くの場合、導体は、約1オーム/平方以下の抵抗率を有するべきである。光透過電極は、インジウム酸化スズを備え得る。電気泳動ディスプレイは、誘電泳動媒体の両側に光透過電極を有する可変透過窓の形態を有し得る。しかしながら、本発明の誘電泳動ディスプレイの使用は、可変透過窓に限定されないで、誘電泳動ディスプレイは、誘電泳動ディスプレイおよび電気誘導ディスプレイがこれまで用いられてきた任意の用途に用いられ得る。従って、例えば、本発明はまた、本発明のディスプレイが備えている電子ブック読取り装置と、ポータブルコンピュータと、タブレットコンピュータと、セルラ電話と、スマートカードと、標示と、時計と、シェルフラベルまたはフラッシュドライブを提供する。
本発明は、例えば、以下を提供する。
(項目1)
誘電泳動ディスプレイを動作する方法であって、該方法は、
流体と、該流体内の複数の少なくとも1種類の粒子とを備えている誘電泳動媒体を提供することと、
第1の周波数を有する電界を該媒体に印加し、それによって該粒子が電気泳動動作を受け、第1の光学状態を生成することと、
該第1の周波数より高い第2の周波数を有する少なくとも1つの電界を該媒体に印加して、それによって該粒子が誘電泳動動作を受けるようにすることと、
該第2の周波数より高い第3の周波数を有する電界を該媒体に印加して、それによって該粒子が誘電泳動動作を受け、該第1の光学状態とは異なる第2の光学状態を生成することと
を包含し、
該方法は、複数の中間周波数の電界が該第1の周波数電界と第3の周波数電界との間で用いられ、その結果、(本明細書において定義されるようの)遷移範囲内において、連続する印加された電界間のどの周波数ステップも該第1の周波数と第3の周波数との間の全周波数差の10パーセントを超えないことを特徴とする、方法。
(項目2)
連続する印加された電界間の上記遷移範囲内のどの周波数ステップも、上記第1の周波数と第3の周波数との間の全周波数差の5パーセントを超えない、項目1に記載の方法。
(項目3)
連続する印加された電界間の上記遷移範囲内のどの周波数ステップも、上記第1の周波数と第3の周波数との間の全周波数差の1パーセントを超えない、項目2に記載の方法。
(項目4)
上記遷移範囲内の上記周波数ステップは、該遷移範囲外の周波数ステップより小さい、項目1に記載の方法。
(項目5)
上記第1、第2および第3の周波数電界はすべて、実質的に同じ振幅で印加される、項目1に記載の方法。
(項目6)
上記第3の周波数電界は、上記第1の周波数電界より大きい振幅で印加される、項目1に記載の方法。
(項目7)
流体と、該流体内の複数の少なくとも1種類の粒子とを備えている誘電泳動媒体と、
該誘電泳動媒体に電界を印加するように配置された少なくとも1つの電極と、
該少なくとも1つの電極によって印加される該電界を制御する電界制御手段であって、該電界制御手段は、第1の周波数を有する電界であって、該粒子が電気泳動動作を受け第1の光学状態を生成するようにする、電界と、該第1の周波数より高い第2の周波数を有する少なくとも1つの電界であって、該粒子が誘電泳動動作を受けるようにする、電界と、該第2の周波数より高い第3の周波数を有する電界であって、該粒子が誘電泳動動作を受けるようにし、該第1の光学状態とは異なる第2の光学状態を生成する、電界とを印加するように配置された、電界制御手段と、
該電界制御手段が該第1の周波数電界と第3の周波数電界との間の複数の中間周波数電界を印加するように配置され、その結果、(本明細書において定義されるような)遷移範囲内において、連続する印加された電界間のどの周波数ステップも該第1の周波数と第3の周波数との間の合計周波数差の10パーセントを超えないことを特徴とするディスプレイと
を備えている、誘電泳動ディスプレイ。
(項目8)
可変透過窓と、光変調器と、電子ブック読取り装置と、ポータブルコンピュータと、タブレットコンピュータと、セルラ電話と、スマートカードと、標示と、時計と、シェルフラベルまたはフラッシュドライブを備えている、項目7に記載のディスプレイ。
(項目9)
流体と、該流体内の複数の少なくとも1種類の粒子とを備えている誘電泳動媒体であって、該粒子は、誘電泳動媒体に電界を印加時に該流体を通って可動である、誘電泳動媒体と、
該誘電泳動媒体が該光透過電極を通って見られ得るように、該誘電泳動媒体に隣接して配置された少なくとも1つの光透過電極と、
該光透過電極から電源に延びる導体であって、該導体は光透過電極よりも高い導電率を有し、該誘電泳動ディスプレイは該導体が少なくとも2つの間隔を置かれた点において光透過電極と接触することを特徴とする、導体と
を備えている、誘電泳動ディスプレイ。
(項目10)
上記誘電泳動媒体および上記光透過電極は直角をなし、上記導体は実質的に該電極の各端の中点で該光透過電極と接触するように配置される、項目9に記載の誘電泳動ディスプレイ。
(項目11)
上記誘電泳動媒体および上記光透過電極は十分に大きく、上記導体が1つの点のみにおいて該光透過電極に接続された場合、該誘電泳動媒体に該1つの点から少なくとも200mm離れて、少なくとも1つの点が該誘電泳動媒体にある、項目9に記載の誘電泳動ディスプレイ。
(項目12)
上記導体は、上記光透過電極の実質的に全周囲の周りに延びる導電性トレースの形態を有する、項目9に記載の誘電泳動ディスプレイ。
(項目13)
上記導体は、約1オーム/平方以下の抵抗率を有する、項目9に記載の誘電泳動ディスプレイ。
(項目14)
光透過電極は、インジウム酸化スズを備えている、項目9に記載の誘電泳動ディスプレイ。
(項目15)
上記誘電泳動媒体の両側に光透過電極を有する可変透過窓の形態である、項目9に記載の誘電泳動ディスプレイ。
(項目16)
光変調器と、電子ブック読取り装置と、ポータブルコンピュータと、タブレットコンピュータと、セルラ電話と、スマートカードと、標示と、時計と、シェルフラベルまたはフラッシュドライブを備えている、項目9に記載のディスプレイ。
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- 本願明細書に記載された発明。
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2007
- 2007-12-03 US US11/949,316 patent/US20080136774A1/en not_active Abandoned
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2008
- 2008-01-24 EP EP12007387A patent/EP2555182A1/en not_active Ceased
- 2008-01-24 EP EP08728187A patent/EP2126885B1/en active Active
- 2008-01-24 CN CN2008800039521A patent/CN101601080B/zh active Active
- 2008-01-24 WO PCT/US2008/051885 patent/WO2008097721A1/en active Application Filing
- 2008-01-24 JP JP2009548364A patent/JP5632164B2/ja active Active
-
2010
- 2010-01-12 HK HK10100284.3A patent/HK1136901A1/xx unknown
-
2012
- 2012-09-04 JP JP2012194141A patent/JP2012238032A/ja not_active Withdrawn
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2014
- 2014-07-07 JP JP2014139375A patent/JP2014186357A/ja active Pending
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WO2019088767A1 (ko) * | 2017-11-03 | 2019-05-09 | 주식회사 엘지화학 | 투과도 가변 장치 |
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JP7335356B2 (ja) | 2019-05-07 | 2023-08-29 | イー インク コーポレイション | 可変光透過デバイスのための駆動方法 |
Also Published As
Publication number | Publication date |
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EP2555182A1 (en) | 2013-02-06 |
EP2126885A1 (en) | 2009-12-02 |
JP2010517115A (ja) | 2010-05-20 |
JP2012238032A (ja) | 2012-12-06 |
HK1136901A1 (en) | 2010-07-09 |
CN101601080A (zh) | 2009-12-09 |
CN103474034A (zh) | 2013-12-25 |
EP2126885A4 (en) | 2011-04-13 |
US20080136774A1 (en) | 2008-06-12 |
CN101601080B (zh) | 2013-10-23 |
EP2126885B1 (en) | 2013-01-02 |
WO2008097721A1 (en) | 2008-08-14 |
JP5632164B2 (ja) | 2014-11-26 |
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