JP2021521491A - 光変調素子 - Google Patents
光変調素子 Download PDFInfo
- Publication number
- JP2021521491A JP2021521491A JP2020563587A JP2020563587A JP2021521491A JP 2021521491 A JP2021521491 A JP 2021521491A JP 2020563587 A JP2020563587 A JP 2020563587A JP 2020563587 A JP2020563587 A JP 2020563587A JP 2021521491 A JP2021521491 A JP 2021521491A
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- JP
- Japan
- Prior art keywords
- light modulation
- layer
- modulation element
- film
- base film
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- Physics & Mathematics (AREA)
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- Chemical & Material Sciences (AREA)
- Mathematical Physics (AREA)
- Ophthalmology & Optometry (AREA)
- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Geometry (AREA)
- Liquid Crystal (AREA)
- Surface Treatment Of Optical Elements (AREA)
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Abstract
Description
本出願は、2018年07月02日に提出された大韓民国特許出願第10−2018−0076481号及び2019年07月02日に提出された大韓民国特許出願第10−2019−0079555号 に基づく優先権の利益を主張し、該当韓国特許出願の文献に開示されたすべての内容は本明細書の一部として組み込まれる。
本出願は、光変調素子及びその用途に関する。
実施例1の光変調素子として、アイウェアのレンズ形状を有する光変調素子を製造した。具体的に、第1及び第2基材フィルム上にそれぞれ電極層が形成されたフィルムとして、PCフィルム上にITO層が蒸着された、総厚さが100μmであるPC−ITOフィルム(Teijin社)を準備した。第1基材フィルムの電極層上に液晶化合物(MDA−16−1235、Merck社)及び12μmの粒径を有するボールスペーサー(KBN−512、Sekisui社)を含む組成物を塗布して、光変調層を形成した。このとき、前記組成物は、PC−ITOフィルム上にアイウェアのレンズのわく形状で塗布された外部シーラントの内部領域に塗布した。第2基材フィルムの電極層が光変調層に接するように第2基材フィルムを合紙した後、スペーサーが存在する領域とスペーサーが存在しない領域の間の基材フィルムが押される力の差によって第1基材フィルムと第2基材フィルムの両表面に表面屈曲が形成された。このとき、基材フィルムの表面屈曲で最も凸な領域と最も凹な領域の高さ差は、0.4μmであった。前記高さ差は、レーザー顕微鏡(OLS4000、オリンパス)を用いて粗さ測定方式で確認した。第2基材フィルムの外側に厚さ100μmのOCA粘着剤(V310、LG化学社)を積層した。第2基材フィルム上にOCA粘着剤を媒介として一面にアンチフォグ層(機能性層)がコーティングされた厚さ190μmのTACフィルム(SAF−RT190、UGAM社)を第2基材フィルムに積層して光変調素子を製造した。前記光変調素子でアンチフォグ層が最外側に存在する。
一面にアンチフォグ層の代わりにハードコーティング層が形成された厚さ190μmのTACフィルム(SHC40T190M、DAICEL社)を用いたこと以外は、実施例1と同一の方法で光変調素子を製造した。
一面にアンチフォグ層がコーティングされた厚さ190μmのTACフィルムの代わりに、一面にハードコーティング層がコーティングされた厚さ500μmのPCフィルム(OM81−5、Polyopt社)を用いたこと以外は、実施例1と同一の方法で光変調素子を製造した。
第2基材フィルム外側に粘着層, バッファー層及びアンチフォグ層を形成しないこと以外は、実施例1と同一の方法で図4に示した光変調素子を製造した。
第2基材フィルムの外側にUV硬化アクリレート樹脂(LGC)をバーコーティングし、3JでUV硬化して3μmのコーティング層を形成したこと以外は、比較例1と同一の方式で光変調素子を製造した。
表面屈曲を評価するために、実施例及び比較例の光変調素子に対して表面反射視感を観察し、その結果を図5〜図9に示した。具体的に、下部反射を防止するために光変調素子の下部(第1基材フィルム側)に黒色フィルムを位置させ、光変調素子の上部(機能性層側)に蛍光灯スタンドを位置させた。光変調素子の上部に正面を基準で約45°の角度でデジタルカメラを固定させた後に撮影して、表面反射視感を観察した。
10:第1基材フィルム
20:第2基材フィルム
30:光変調層
31:スペーサー
40:バッファー層
41:粘着層
42:バッファーフィルム
50:機能性層
Claims (20)
- 対向配置された第1及び第2基材フィルム及び、前記第1及び第2基材フィルムの間に配置されており、スペーサーを含む光変調層を有し、
前記第1及び第2基材フィルムのうち一つ以上の基材フィルムの外側に配置されたバッファー層をさらに有する、光変調素子。 - 前記第1又は第2基材フィルムの厚さ(T4)と対向配置された前記第1及び第2基材フィルムの間の間隔(T5)の割合(T4/T5)は、1〜30の範囲内である、請求項1に記載の光変調素子。
- 前記スペーサーは、前記光変調層内に互いに離隔されて複数存在する、請求項1または2に記載の光変調素子。
- 前記バッファー層は、バッファーフィルム及び粘着層を順次に含む、請求項1から3の何れか一項に記載の光変調素子。
- 前記バッファーフィルムは、前記粘着層を媒介として前記第1基材フィルム及び第2基材フィルムのうち一つ以上の基材フィルムの外側に付着されている、請求項4に記載の光変調素子。
- 前記バッファーフィルムは、両表面が平坦である、請求項4または5に記載の光変調素子。
- 前記粘着層は、前記バッファーフィルムに向ける表面は平坦であり、前記光変調層に向ける表面は表面屈曲を有する、請求項4または5に記載の光変調素子。
- 前記粘着層は、OCA(Optically Clear Adhesive)粘着剤を含む、請求項4から7の何れか一項に記載の光変調素子。
- 前記粘着層の厚さ(T1)と前記第1又は第2基材フィルムの厚さ(T2)の割合(T1/T2)が0.1〜4の範囲内である、請求項4から8の何れか一項に記載の光変調素子。
- 前記粘着層の厚さ(T1)と前記バッファーフィルムの厚さ(T3)の割合(T3/T1)が0.25〜50の範囲内である、請求項9に記載の光変調素子。
- 前記第1基材フィルム及び第2基材フィルムのうち一つ以上の基材フィルムは、前記スペーサーにより表面屈曲を有する、請求項1から10の何れか一項に記載の光変調素子。
- 前記表面屈曲は、前記スペーサーが存在する領域に対応する基材フィルムの領域で凸部を有し、前記スペーサーが存在しない領域に対応する基材フィルムの領域で凹部を有する、請求項11に記載の光変調素子。
- 前記表面屈曲で最も凸な領域と最も凹な領域の高さ差が0.1μm〜1μmである、請求項11または12に記載の光変調素子。
- 前記第1基材フィルム及び第2基材フィルムのうち一つ以上の基材フィルムは、フレキシブルフィルムである、請求項1から13の何れか一項に記載の光変調素子。
- 前記第1基材フィルムの内側に第1電極層を含み、前記第2基材フィルムの内側に第2電極層をさらに含む、請求項1から14の何れか一項に記載の光変調素子。
- 前記光変調層に対する電圧印加の有無によって透過率を変化させる、請求項1から15の何れか一項に記載の光変調素子。
- 前記光変調層は、光変調物質として液晶化合物を含む、請求項1から16の何れか一項に記載の光変調素子。
- 前記バッファー層の外側に配置された機能性層をさらに含み、前記機能性層は、アンチフォグ層(anti−fog layer)、セルフヒーリング層(self−healing layer)、アンチリフレッション層(anti−reflection layer)、アンチフィンガー層(anti−finger layer)、アンチファウリング層(anti−fouling layer)、アンチグレア層(anti−glare layer)、ミラー層(mirror layer)又は硬度向上層を含む、請求項1から17の何れか一項に記載の光変調素子。
- 請求項1から18の何れか一項に記載の光変調素子を含むフレキシブル表示装置。
- 前記フレキシブル表示装置は、アイウェアであり、
前記アイウェアは、それぞれ前記光変調素子を含む左眼用レンズと右眼用レンズ;及び前記左眼用レンズと右眼用レンズを支持するフレームを含む、請求項19に記載のフレキシブル表示装置。
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