JP7374515B2 - 回折導光板および回折導光板の製造方法 - Google Patents
回折導光板および回折導光板の製造方法 Download PDFInfo
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Description
本出願は、2019年4月25日付韓国特許出願第10-2019-0048581号および2020年4月16日付韓国特許出願第10-2020-0046117号に基づいた優先権の利益を主張し、当該韓国特許出願の文献に開示された全ての内容は本明細書の一部として組み含まれる。
[式1]
{(平板型上部基板の荷重+硬化性組成物の硬化収縮力)Х0.95}≦緩衝型スペーサの圧縮応力≦{(平板型上部基板の荷重+硬化性組成物の硬化収縮力)Х1.05}。
[一般式1]
厚さ偏差(%)=(最大偏差/平均厚さ)Х100
[一般式2]
ワープ=中央面と基準面の最大偏差-中央面と基準面の最小偏差
前記モールディング空間に硬化性組成物を充填する段階;および
前記平板型上部基板の荷重で前記硬化性組成物を圧縮し、前記硬化性組成物を硬化する段階;を含み、
前記平板型上部基板の荷重で前記硬化性組成物を圧縮し、前記硬化性組成物を硬化する段階は下記式1を満たす。
[式1]
{(平板型上部基板の荷重+硬化性組成物の硬化収縮力)Х0.95}≦緩衝型スペーサの圧縮応力≦{(平板型上部基板の荷重+硬化性組成物の硬化収縮力)Х1.05}
[式1-1]
{(平板型上部基板の荷重+硬化性組成物の硬化収縮力)Х0.97}≦緩衝型スペーサの圧縮応力≦{(平板型上部基板の荷重+硬化性組成物の硬化収縮力)Х1.03}
[式1-2]
{(平板型上部基板の荷重+硬化性組成物の硬化収縮力)Х0.98}≦緩衝型スペーサの圧縮応力≦{(平板型上部基板の荷重+硬化性組成物の硬化収縮力)Х1.02}
[式1-3]
{(平板型上部基板の荷重+硬化性組成物の硬化収縮力)Х0.99}≦緩衝型スペーサの圧縮応力≦{(平板型上部基板の荷重+硬化性組成物の硬化収縮力)Х1.01}
[一般式3]
硬化収縮率(%)={(硬化前体積-完全硬化後体積)/硬化前体積}Х100
ビス(2,3-エピチオプロピル)ジスルフィド(Bis(2,3-epithiopropyl)disulfide)88.5重量部、2,2’-チオジエタンチオール(2,2’-Thiodiethanethiol)6.5重量部、イソホロンジイソシアネート(Isophoronediisocyanate)5.0重量部およびテトラブチルホスホニウムブロミド(Tetrabutylphosphonium bromide)0.07重量部を含む硬化性組成物を製造した。
下部基板として屈曲弾性率70GPa、表面平坦度が0.5μm、厚さが30mm、直径が200mmであるガラス基板を準備し、前記下部基板上に回折格子パターンが陰刻されたテンプレート(屈曲弾性率:3GPa)を付着した。この時、下部基板の円中心とテンプレートの円中心が接するように付着し、前記テンプレートの直径は150mm、厚さは200μmであるポリエチレンテレフタレート(PET)であり、陰刻された回折格子パターンの周期(pitch)は405nmであり、深さ(depth)は500nmであった。
下部基板でなく、上部基板に回折格子パターンが陰刻されたテンプレートを付着することを除いては、実施例1と同様な方法で回折導光板を製造した。
スペーサの高さが427μmであり、下部基板でなく、上部基板に回折格子パターンが陰刻されたテンプレートを付着することを除いては、実施例1と同様な方法で回折導光板を製造した。
下部基板として屈曲弾性率70GPa、表面平坦度が0.5μm、厚さが30mm、直径が200mmであるガラス基板を利用し、圧縮弾性係数が1.0MPa、高さが805μm、断面積が10Х10mm2であるシリコン材質の緩衝型スペーサを前記下部基板の円周に接するように120°間隔に備えてモールディング空間を形成した後、前記製造例により製造された硬化性組成物をモールディング空間に注入した後、上部基板として屈曲弾性率が70GPa、荷重が8.2N、直径が200mm、表面平坦度が0.5μmであるガラス基板を利用して前記硬化性組成物をモールディング空間に充填させた。
1.厚さ偏差の測定
実施例および比較例の回折導光板の厚さ偏差は下記一般式1を通じて計算し、その結果は下記表1に示した。
[一般式1]
厚さ偏差(%)=(最大偏差/平均厚さ)Х100
実施例および比較例の回折導光板を長軸600mmおよび短軸400mmの直四角領域の試片を準備し、下記一般式2を通じてワープを計算し、その結果は下記表1に示した。
[一般式2]
ワープ=中央面と基準面の最大偏差-中央面と基準面の最小偏差
実施例および比較例の回折導光板のヘイズをASTMD-1003に準拠して測定し、その結果を下記表1に示した。
実施例および比較例の回折導光板の表面に荷重0.5kg、角度45°に鉛筆を固定させた後、鉛筆硬度別に掻いて肉眼で掻かれるか否かを判断し、スクラッチが生じない最大鉛筆硬度を下記表1に示した。
300:光学層
400:パターン単位体
501:平板型下部基板
502:平板型上部基板
503:緩衝型スペーサ
504:回折格子パターンが陰刻されたテンプレート
600:硬化性組成物
Claims (10)
- 平板型下部基板、平板型上部基板、前記平板型下部基板と前記平板型上部基板の間に位置する緩衝型スペーサ、および前記平板型下部基板または平板型上部基板に含まれる回折格子パターンが陰刻されたテンプレート(template)を含み、前記緩衝型スペーサによりモールディング空間が区画されるモールド装備を準備する段階;
前記モールディング空間に硬化性組成物を充填する段階;および
前記平板型上部基板の荷重で前記硬化性組成物を圧縮し、前記硬化性組成物を硬化する段階;を含み、
前記硬化性組成物は、エピスルフィド化合物およびチオール化合物を含み、
前記平板型上部基板の荷重で前記硬化性組成物を圧縮し、前記硬化性組成物を硬化する段階は下記式1を満たすように行われ、
前記平板型上部基板の荷重は、3.4N乃至34Nである、回折導光板製造方法。
[式1]
{(平板型上部基板の荷重(N)+硬化性組成物の硬化収縮力(N))Х0.95}≦緩衝型スペーサの圧縮応力(N)≦{(平板型上部基板の荷重(N)+硬化性組成物の硬化収縮力(N))Х1.05} - 前記平板型下部基板および前記平板型上部基板の屈曲弾性率は、それぞれ3GPa以上である、請求項1に記載の回折導光板製造方法。
- 前記回折格子パターンが陰刻されたテンプレートは、屈曲弾性率が1乃至20GPaである、請求項1または2に記載の回折導光板製造方法。
- 前記平板型下部基板および前記平板型上部基板の表面平坦度は、それぞれ5μm以下である、請求項1から3のいずれか一項に記載の回折導光板製造方法。
- 前記緩衝型スペーサの圧縮弾性係数は、0.1乃至10MPaである、請求項1から4のいずれか一項に記載の回折導光板製造方法。
- 前記緩衝型スペーサは、非弾性層と弾性層が積層された構造、非弾性層の間に弾性層が備えられた構造、または弾性層間に非弾性層が備えられた構造である、請求項1から5のいずれか一項に記載の回折導光板製造方法。
- 前記硬化性組成物の硬化収縮率は、15%以下である、請求項1から6のいずれか一項に記載の回折導光板製造方法。
- 前記エピスルフィド化合物は、ビス(2,3-エピチオプロピル)スルフィド、ビス(2,3-エピチオプロピル)ジスルフィド、ビス(2,3-エピチオプロピル)トリスルフィド、ビス(2,3-エピチオプロピルチオ)メタン、1,2-ビス(2,3-エピチオプロピルチオ)エタン、1,3-ビス(2,3-エピチオプロピルチオ)プロパン、1,2-ビス(2,3-エピチオプロピルチオ)プロパン、1,4-ビス(2,3-エピチオプロピルチオ)ブタン、およびビス(2,3-エピチオプロピルチオエチル)スルフィドからなる群より選択される1種以上である、請求項1から7のいずれか一項に記載の回折導光板製造方法。
- 前記チオール化合物は、m-キシリレンジチオール、p-キシリレンジチオール、o-キシリレンジチオール、2,2’-チオジエタンチオール、ペンタエリスリトールテトラキス(2-メルカプトアセテート)、ペンタエリスリトールテトラキス(3-メルカプトプロピオネート)、および1,2-ビス(2-メルカプトエチルチオ)-3-メルカプトプロパンからなる群より選択された一つ以上である、請求項1から8のいずれか一項に記載の回折導光板製造方法。
- 前記硬化性組成物は、イソシアネート化合物をさらに含む、請求項1から9のいずれか一項に記載の回折導光板製造方法。
Applications Claiming Priority (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR20190048581 | 2019-04-25 | ||
KR10-2019-0048581 | 2019-04-25 | ||
KR10-2020-0046117 | 2020-04-16 | ||
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US11844240B2 (en) * | 2019-11-12 | 2023-12-12 | Samsung Display Co., Ltd. | Display device and method of manufacturing the same |
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KR20200125458A (ko) | 2020-11-04 |
KR102375853B1 (ko) | 2022-03-17 |
JP2021532420A (ja) | 2021-11-25 |
CN112534185B (zh) | 2023-11-07 |
US20210294041A1 (en) | 2021-09-23 |
EP3940291A4 (en) | 2022-06-22 |
CN112534185A (zh) | 2021-03-19 |
US20240402432A1 (en) | 2024-12-05 |
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