JP5448463B2 - 電気光学表示素子の生成方法 - Google Patents
電気光学表示素子の生成方法 Download PDFInfo
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Description
積層接着剤の層と電気光学媒体の層とを備えるサブアセンブリを形成するステップと、
上記サブアセンブリを貫通する開口を形成するステップと、
その後、サブアセンブリの積層接着剤の層の露出表面に、開口を横切って延在する光透過性電極層を固定するステップと
を含む、電気光学表示素子内での使用用のフロントプレーンラミネートの生産のためプロセスを提供する。
本発明のこれらの側面は、同一目的、すなわち、本層とバックプレーンとの間の電気接続を形成するための、電極層の物理的または溶剤による除去の必要性を低減または排除し、薄型基板を使用する際に、電極層(特に、脆弱な金属酸化物層、例えば、インジウムスズ酸化物層)に亀裂または損傷を及ぼすリスクを減少するという目的を共有するため、一緒にグループ化される。
図1Dでは、電極層110は、接着層104および電気光学媒体層104よりも大きく示されていることが分かるであろう。これは、図1Dに示される最終フロントプレーンラミネートが、前述のWO2003/104884に記載のいわゆる「アンダーフィル」エッジシールを有する、電気光学表示素子の生産において使用されることを目的としているため、意図的なものである。そのようなアンダーフィルシールを生成するためには、バックプレーン、電極層、および前面支持層(存在する場合)はすべて、フロントプレーンラミネートがバックプレーンに積層された後、封止材料がバックプレーンと電極または前面支持部との間に注入され、接着剤および電気光学媒体層を完全に取り囲むエッジシールを形成するために硬化されることが可能となるように、介在する接着剤および電気光学媒体層よりも両寸法において大きく作製される。
前述のように、別の側面では、本発明は、前述のWO2003/104884に記載のようなフロントプレーンラミネートを使用する電気光学表示素子を形成するためのプロセスの修正例を提供する。本発明によると、本プロセスは、電気光学表示素子を形成するためにフロントプレーンラミネートがバックプレーンに積層される前に、補強層をフロントプレーンラミネートおよびバックプレーンのうちの少なくとも1つに固定することによって修正される。積層後、補強層は、典型的には、除去される。バックプレーンへの積層に先立って、補強層がフロントプレーンラミネートに固定されてもよいという場合、我々は、FPLが定位置の補強層とともに製造され得る可能性を排除するわけではなく、補強層によって提供される補強効果は、バックプレーンへのその積層の際と同様にFPL自体の製造の際にも有用であり得るため、実際、これは、最も便宜なアプローチである場合が多い。例えば、PET上に(例えば)ITOを含む薄型可撓性の基板から開始するFPLを調製することが所望される場合、初めに、基板を補強層に固定し、次いで、電気光学媒体、その後、接着層を基板上にコーティングし、最終に、接着剤を離型シートで覆うことによってFPLを調製することは有利となり得る。そのようなプロセスでは、補強層によって提供される基板の増加した剛性は、コーティングプロセスが網体上で行われる場合(通常の場合)、有益な引張の際の改良点と均一性とを提供し得る。次いで、得られたFPLは、常法でバックプレーンに積層され、電気光学表示素子を形成し、補強層が最終表示素子から除去されてもよい。
前述のように、従来技術による電気光学表示素子およびフロントプレーンラミネートでは、積層接着剤の選択には、接着層内の空隙の形成を回避するための優れた積層品質の必要性と表示素子の高温性能との妥協が伴った。優れた積層品質を提供するためには、軟質の接着剤(70℃および10−4Hz時、G’<1000Pa)を使用することが望ましいが、そのような接着剤は、その低結合力のため、完成した電気光学表示素子において良好な高温性能を提供しない。高温性能を向上させるため、より剛性が高くかつより弾性的な接着剤が必要である。
一体型バリア層および/またはエッジシールとを備えた複合電気光学表示素子を組み立てるステップは、複雑なプロセスとなり得る。最終の表示素子の必要とされるすべての層を含むフロントプレーンラミネートを製造業者に供給することは可能であるが、このフロントプレーンラミネートを形成するステップは、いくつかの積層ステップの間に、種々の層の位置合わせが必要とされる場合がある。必要とされる配列の許容誤差によって、網体またはシートベースのプロセスを使用したFPLの形成が不可能な場合がある。典型的には、エッジシールは、依然として、製造業者によって、各表示素子に個々に形成される必要があるだろう。また、製造および在庫の理由から、製造業者への最終の表示素子の供給前に、FPL構造全体を組み立てることは回避することが望ましい場合がある。
Claims (13)
- 電気光学表示素子において使用するフロントプレーンラミネートの生成方法であって、
積層接着剤の層(104;204)と電気光学媒体の層(102;202)とを含むサブアセンブリを形成することと、
該サブアセンブリを貫通する開口(108;208)を形成することと、
その後、該サブアセンブリの該積層接着剤の層(104;204)の露出表面に、光透過性の電極層(110;210)を固定することであって、該光透過性の電極層(110;210)は、該開口(108;208)を横切って延在し、該開口(108;208)は、該光透過性の電極層(110;210)を貫通して延在しない、ことと
を含む、方法。 - 前記開口は、前記積層接着剤の層および前記電気光学媒体の層の縁まで延在し、該開口は、該縁からの切り欠きの形態をとる、請求項1に記載の方法。
- 前記開口(108;208)は、前記積層接着剤の層および前記電気光学媒体の層によって完全に取り囲まれる、請求項1に記載の方法。
- 前記サブアセンブリは、前記積層接着剤の層(104;204)の露出表面および前記電気光学媒体の層(102;202)の露出表面のうちの少なくとも1つを覆う少なくとも1つの離型シート(100、106;200、206)をさらに含む、請求項1に記載の方法。
- 前記開口(108;208)は、少なくとも1つの離型シート(100、106;200、206)を貫通して延在する、請求項4に記載の方法。
- 前記光透過性の電極層は、支持層によって支持される、請求項1に記載の方法。
- 前記サブアセンブリは、前記電気光学媒体の層(202)の両側に配置される第1の積層接着剤の層および第2の積層接着剤の層(204、212)を含み、前記開口(208)は、該第1の積層接着剤の層および該第2の積層接着剤の層(204、212)の両方を貫通して延在する、請求項1に記載の方法。
- 前記光透過性の電極層が前記積層接着剤の層に固定された後、前記サブアセンブリは、少なくとも1つの電極を含むバックプレーンに積層され、導電性材料が、該光透過性の電極層と該バックプレーンに設けられた接点との間に電気接続を提供するように、この積層の際に、前記開口内に導入される、請求項1に記載の方法。
- 前記電気光学媒体は、回転2色部材またはエレクトロクロミック材料を含む、請求項1に記載の方法。
- 前記電気光学媒体は、複数の帯電した粒子を含む電気泳動材料を含み、該複数の帯電した粒子は、流体内に配置され、電場の影響下、該流体中を移動可能である、請求項1に記載の方法。
- 前記複数の帯電した粒子および前記流体は、複数のカプセルまたはマイクロセル内に閉じ込められる、請求項10に記載の方法。
- 前記複数の帯電した粒子および前記流体は、高分子材料を含む連続相によって取り囲まれる複数の離散液滴として存在する、請求項10に記載の方法。
- 前記流体は、ガス状である、請求項10に記載の方法。
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US20070091417A1 (en) | 2005-10-25 | 2007-04-26 | E Ink Corporation | Electrophoretic media and displays with improved binder |
US7843624B2 (en) * | 2006-03-08 | 2010-11-30 | E Ink Corporation | Electro-optic displays, and materials and methods for production thereof |
US8610988B2 (en) | 2006-03-09 | 2013-12-17 | E Ink Corporation | Electro-optic display with edge seal |
US7477444B2 (en) | 2006-09-22 | 2009-01-13 | E Ink Corporation & Air Products And Chemical, Inc. | Electro-optic display and materials for use therein |
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2007
- 2007-03-06 US US11/682,409 patent/US7733554B2/en active Active
- 2007-03-06 TW TW096107630A patent/TWI350793B/zh active
- 2007-03-08 DE DE602007011735T patent/DE602007011735D1/de active Active
- 2007-03-08 WO PCT/US2007/063551 patent/WO2007104003A2/en active Application Filing
- 2007-03-08 CN CN201210102174.XA patent/CN102967980B/zh active Active
- 2007-03-08 EP EP10016103.3A patent/EP2309304B1/en active Active
- 2007-03-08 EP EP07758133A patent/EP1991901B1/en active Active
- 2007-03-08 JP JP2008558530A patent/JP5448463B2/ja active Active
- 2007-03-08 CN CN2007800011818A patent/CN101356467B/zh active Active
- 2007-03-08 AT AT07758133T patent/ATE494571T1/de not_active IP Right Cessation
- 2007-03-08 CN CN201010122941A patent/CN101819367A/zh active Pending
- 2007-03-08 EP EP11009217.8A patent/EP2437114B1/en active Active
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Also Published As
Publication number | Publication date |
---|---|
DE602007011735D1 (de) | 2011-02-17 |
US20070211331A1 (en) | 2007-09-13 |
US7733554B2 (en) | 2010-06-08 |
WO2007104003A3 (en) | 2008-07-17 |
WO2007104003A2 (en) | 2007-09-13 |
EP2437114A1 (en) | 2012-04-04 |
ATE494571T1 (de) | 2011-01-15 |
CN102967980A (zh) | 2013-03-13 |
JP2009529710A (ja) | 2009-08-20 |
CN101819367A (zh) | 2010-09-01 |
CN101356467A (zh) | 2009-01-28 |
TWI350793B (en) | 2011-10-21 |
HK1124397A1 (en) | 2009-07-10 |
CN102967980B (zh) | 2016-07-06 |
CN101356467B (zh) | 2012-07-11 |
JP2015062086A (ja) | 2015-04-02 |
EP1991901A2 (en) | 2008-11-19 |
EP2309304A3 (en) | 2011-11-09 |
EP2309304B1 (en) | 2013-05-15 |
EP1991901A4 (en) | 2009-12-23 |
EP2437114B1 (en) | 2014-10-01 |
EP2309304A2 (en) | 2011-04-13 |
TW200738465A (en) | 2007-10-16 |
EP1991901B1 (en) | 2011-01-05 |
JP2012123422A (ja) | 2012-06-28 |
JP5719423B2 (ja) | 2015-05-20 |
HK1176687A1 (zh) | 2013-08-02 |
JP2014013421A (ja) | 2014-01-23 |
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