JP7323988B2 - 有機el表示装置 - Google Patents
有機el表示装置 Download PDFInfo
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- JP7323988B2 JP7323988B2 JP2018060654A JP2018060654A JP7323988B2 JP 7323988 B2 JP7323988 B2 JP 7323988B2 JP 2018060654 A JP2018060654 A JP 2018060654A JP 2018060654 A JP2018060654 A JP 2018060654A JP 7323988 B2 JP7323988 B2 JP 7323988B2
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Images
Description
1.有機EL表示装置1の構成
第1実施形態のフィルム部材15は、複数の樹脂成分の相分離構造を有する。フィルム部材15は、一例として、複数の樹脂成分の相分離構造により、複数の長細状(紐状又は線状)凸部が第1面15aに形成されている。長細状凸部は分岐しており、密な状態で共連続相構造を形成している。
調製工程では、溶媒と、フィルム部材15を構成するための樹脂組成物とを含む溶液を調製する。溶媒は、前述したフィルム部材15に含まれるポリマー及び硬化性樹脂前駆体の種類及び溶解性に応じて選択できる。溶媒は、少なくとも固形分(複数種類のポリマー及び硬化性樹脂前駆体、反応開始剤、その他添加剤)を均一に溶解できるものであればよい。
形成工程では、調製工程で調製した溶液を、支持体の平滑な表面に流延又は塗布する。溶液の流延方法又は塗布方法としては、慣用の方法、例えば、スプレー、スピナー、ロールコーター、エアナイフコーター、ブレードコーター、ロッドコーター、リバースコーター、バーコーター、コンマコーター、ディップ、ディップ・スクイズコーター、ダイコーター、グラビアコーター、マイクログラビアコーター、シルクスクリーンコーター等を例示できる。
硬化工程では、溶液中の硬化性樹脂前駆体を硬化させることで、形成工程で形成された相分離構造を固定化し、フィルム部材15を形成する。硬化性樹脂前駆体の硬化は、硬化性樹脂前駆体の種類に応じて、加熱又は活性エネルギー線の照射、或いはこれらの方法の組み合わせにより行う。照射する活性エネルギー線は、光硬化成分等の種類に応じて選択する。
第1実施形態の変形例として、フィルム部材15は、複数の樹脂成分中に分散された複数の微粒子を更に含むことができる。このように、相分離構造と共に複数の微粒子を用いることで、フィルム部材15のヘイズ値を設定し易くすることができる。
図3は、第2実施形態に係るフィルム部材115の一部拡大断面図である。図3に示すように、第2実施形態に係るフィルム部材115は、マトリクス樹脂116と、マトリクス樹脂116中に分散された複数の微粒子117を含む。微粒子117は、ここでは中実の真球状に形成されている。フィルム部材115には、微粒子117が一次粒子として分散して配置されている。
調製工程では、溶媒と、フィルム部材115を構成するための樹脂組成物と、微粒子117とを含む溶液を調製する。溶媒としては、アルコール類(イソプロピルアルコール、メタノール、エタノール等)、ケトン類(メチルエチルケトン(MEK)、メチルイソブチルケトン(MIBK)、シクロヘキサノン等)、エステル類(酢酸メチル、酢酸エチル、酢酸ブチル等)、ハロゲン化炭化水素、芳香族炭化水素(トルエン、キシレン等)の少なくともいずれかを例示できる。溶液には、更に公知のレベリング剤を添加してもよい。例えば、フッ素系やシリコーン系のレベリング剤を用いることにより、フィルム部材115に良好な耐擦傷性を付与できる。
塗布工程では、調製工程で調製した溶液を、第1実施形態と同様の方法により、支持体の表面に流延又は塗布する。支持体の表面に流延又は塗布した溶液から、溶媒を乾燥により蒸発させて除去する。
図4は、第3実施形態に係るフィルム部材215の製造方法を示す図である。フィルム部材215は、表面に凹凸形状が賦形された構造を有する。フィルム部材215は、樹脂フィルムで構成されている。
図5は、第4実施形態に係る有機EL表示装置100の断面図である。図5に示すように、表示装置100は、タッチパネルユニット3を備えていない。また表示装置100が備えるディスプレイユニット102は、ボトムエミッション型である。即ち、第1基板104、第1電極105が透明であり、第2電極109は、反射電極である。
第1実施形態におけるフィルム部材15を実施例1として作製した。第2実施形態におけるフィルム部材115を実施例2として作製した。第3実施形態におけるフィルム部材215を実施例3として作製した。TAC、ポリビニルアルコール(PVA)、TAC、及び粘着層を順に積層してなる偏光板(日東電工(株)製、厚み寸法203μm)を比較例として作製した。
3 タッチパネルユニット
4,104 第1基板
5,105 第1電極
7,7R,7G,7B 有機発光層
9,109 第2電極
11,111 第2基板
15,115,215 フィルム部材
116 マトリクス樹脂
117 微粒子
Claims (6)
- 一方の面に回路が設けられた第1基板と、
前記第1基板における前記一方の面側に配置されて前記回路と接続された複数の第1電極と、
前記複数の第1電極の前記第1基板側とは反対側で、前記複数の第1電極の各々と重ねて配置された複数の有機発光層と、
前記複数の有機発光層の前記第1基板側とは反対側で、前記複数の有機発光層と重ねて配置された第2電極と、
前記第2電極の前記第1基板側とは反対側で、前記第1電極、前記有機発光層、及び前記第2電極を介して、前記第1基板に対向配置された第2基板と、を備え、
前記複数の有機発光層は、複数の発光色の前記有機発光層を含み、
外気と接触するように配置された表示画面側の表面のヘイズ値が、65%以上80%以下の範囲の値に設定され、前記複数の有機発光層において生じた光が、前記第1基板側から画面表示に供されるボトムエミッション型であり、
外気と接触するように配置された表示画面側の表面部分が、マトリクス樹脂と、マトリクス樹脂に分散された複数の微粒子とを含み、
前記複数の有機発光層において生じた光の光路上の円偏光板の配置が省略されている、有機EL表示装置。 - 前記第1基板及び前記第2基板に対して重ねて配置されたタッチパネルユニットを更に備え、
前記表示画面側の前記表面が、前記タッチパネルユニットの入力側の表面である、請求項1に記載の有機EL表示装置。 - 前記第1基板と重ねて配置されたフィルム部材を更に備え、
前記フィルム部材の一方の面が、前記表示画面側の前記表面である、請求項1又は2に記載の有機EL表示装置。 - 前記フィルム部材の全光線透過率が、60%以上100%以下の範囲の値に設定されている、請求項3に記載の有機EL表示装置。
- 前記フィルム部材の入射角60°におけるグロス値が、0%以上10%以下の範囲の値に設定されている、請求項3又は4に記載の有機EL表示装置。
- 前記フィルム部材は、前記マトリクス樹脂と、前記マトリクス樹脂中に分散された前記複数の微粒子とを含むことにより、前記一方の面に、前記複数の微粒子による凹凸が形成されている、請求項3又は4に記載の有機EL表示装置。
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