JP7225507B2 - コーティング組成物 - Google Patents
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Description
第1基板は、一面にITO(Indium Tin Oxide)電極層が形成されている厚さが100μmであるPC(Polycarbonate)フィルムを使って製作した。コーティング組成物は平均直径(D50直径)が約100nm程度であり、密度が約2.7g/cm3程度である球状シリカ(SiO2)ナノ粒子、平均直径(D50)が約12μm程度であり、密度が約1.29g/cm3程度であるボールスペーサーおよびポリイミド系列の配向膜形成用物質(Nissan社、SE-7492)を約2:20:150の重量比率(ナノ粒子:ボールスペーサー:配向膜形成用物質)で混合し、前記混合物をN-メチル-2-ピロリドン(N-Methyl-2-pyrrolidone)、ブチルセロソルブ(Butyl cellosolve)およびジプロピレングリコールモノエチルエーテル(Dipropyleneglycol monomethyl ether、DPM)の混合溶媒内に約1.5重量%の濃度で分散させたもの(配向膜形成材)を使った。前記配向膜形成材をバーコーティング方式(Meyer Bar Coating)で最終配向膜厚さが約200nm程度となるようにコーティングした。引き続き、約130℃のオーブンで約20分の間維持してベーキングおよびイミド化(imidizing)工程を進行した。引き続き、前記ベーキングおよびイミド化された層をラビングして配向膜を形成した。
第2基板は、ポリイミド系列の配向膜形成用物質(Nissan社、SE-7492)を溶媒としてN-メチル-2-ピロリドン(N-Methyl-2-pyrrolidone)、ブチルセロソルブ(Butyl cellosolve)およびジプロピレングリコールモノエチルエーテル(Dipropyleneglycol monomethyl ether、DPM)の混合溶媒内に約2.0重量%の濃度で分散させた配向膜形成材(コーティング組成物)を使ったことを除いては、第1基板と同じ方式で最終配向膜厚さが約250nm程度となるように配向膜を形成して製作した。
前記第1基板の端部には通常液晶セルの製造に適用されるシーラントをコーティングし、第2基板に光変調物質(Merck社のMAT-16-969液晶(ne:1.5463、no:1.4757、ε∥:7.4、ε⊥:3.2、TNI:85℃、△n:0.0706、△ε:4.2)と異方性染料(BASF社、X12)の混合物)をドッティング(dotting)した後に前記第1および第2基板を合着することによって、ドッティング(dotting)された光変調物質が2個の基板の間に等しく拡散するようにして光学デバイスを製造した。
第1基板の製作時にコーティング組成物のナノ粒子として、平均直径(D50直径)が約100nm程度であり、密度が約1.2g/cm3程度であるシリカ(SiO2)ナノ粒子を使ったことを除いては、実施例1と同じ方式で第1および第2基板と光学デバイスをそれぞれ制作した。
第1基板の製作時にコーティング組成物にナノ粒子を使っていないことを除いては、実施例1と同じ方式で第1および第2基板と光学デバイスをそれぞれ制作した。
実施例および比較例でそれぞれ製造された基板または光学デバイスでのスペーサーおよびナノ粒子の分散度を確認したし、前記分散度は光学顕微鏡を利用して観察した。
Claims (11)
- 第1基板;前記第1基板と対向配置されている第2基板;および前記第1基板と第2基板の間に存在する光変調物質を含む光学デバイスであって、
前記第1基板の一面に第1の配向膜が形成され、前記第2基板上に第2の配向膜が形成されており、
前記第1の配向膜は、配向膜形成用物質;スペーサー;およびナノ粒子を含み、
前記第2の配向膜は、前記配向膜形成用物質を含むが、前記スペーサーおよびナノ粒子を含まず、
前記スペーサーの密度は前記ナノ粒子の密度に比べて小さく、
前記ナノ粒子の密度は1.5g/cm3~10g/cm3の範囲内にあり、
前記ナノ粒子が前記第1基板に近く積層されて凹凸を形成する、光学デバイス。 - 前記配向膜形成用物質がラビング配向膜形成用物質または光配向膜形成用物質である、請求項1に記載の光学デバイス。
- 前記配向膜形成用物質は、ポリイミド化合物、ポリビニルアルコール化合物、ポリアミック酸化合物、ポリスチレン化合物、ポリアミド化合物、ポリオキシエチレン化合物、ポリノルボルネン化合物、フェニルマレイミド共重合体化合物、ポリビニルシンナメート化合物、ポリアゾベンゼン化合物、ポリエチレンイミン化合物、ポリエチレン化合物、ポリスチレン化合物、ポリフェニレンフタルアミド化合物、ポリエステル化合物、CMPI(chloromethylated polyimide)化合物およびポリメチルメタクリレート化合物からなる群から選択された一つ以上を含む、請求項1または2に記載の光学デバイス。
- 前記スペーサーはD50粒径が1μm以上である、請求項1から3のいずれか一項に記載の光学デバイス。
- 前記スペーサーの密度は1g/cm3~5g/cm3の範囲内にある、請求項1から4のいずれか一項に記載の光学デバイス。
- 前記スペーサーの密度(A)および前記ナノ粒子の密度(B)の比率(B/A)は1.5~10の範囲内にある、請求項1から5のいずれか一項に記載の光学デバイス。
- 前記スペーサーを前記配向膜形成用物質100重量部対比0.5~10、000重量部の比率で含む、請求項1から6のいずれか一項に記載の光学デバイス。
- 前記ナノ粒子のD50粒径は1μm以下である、請求項1から7のいずれか一項に記載の光学デバイス。
- 前記ナノ粒子は球状粒子または下記の数式1を満足する粒子である、請求項1から8のいずれか一項に記載の光学デバイス:
[数式1]
LA<3×SA
数式1でLAは前記ナノ粒子の長軸の長さであり、SAは前記ナノ粒子の短軸の長さである。 - 前記ナノ粒子を前記配向膜形成用物質100重量部対比0.01~10、000重量部の比率で含む、請求項1から9のいずれか一項に記載の光学デバイス。
- 前記光変調物質は、二色性染料をさらに含む、請求項1から10のいずれか一項に記載の光学デバイス。
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PCT/KR2019/001000 WO2019151709A1 (ko) | 2018-01-30 | 2019-01-24 | 코팅 조성물 |
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TWI690569B (zh) | 2020-04-11 |
KR20190091967A (ko) | 2019-08-07 |
EP3747959A1 (en) | 2020-12-09 |
WO2019151709A1 (ko) | 2019-08-08 |
US11629292B2 (en) | 2023-04-18 |
CN111655801A (zh) | 2020-09-11 |
US20200354634A1 (en) | 2020-11-12 |
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TW201936816A (zh) | 2019-09-16 |
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EP3747959A4 (en) | 2021-03-24 |
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