JP6698552B2 - 光学積層体、偏光板及び表示装置 - Google Patents
光学積層体、偏光板及び表示装置 Download PDFInfo
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- G—PHYSICS
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- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/20—Filters
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- G02B5/00—Optical elements other than lenses
- G02B5/30—Polarising elements
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- G—PHYSICS
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- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/30—Polarising elements
- G02B5/3025—Polarisers, i.e. arrangements capable of producing a definite output polarisation state from an unpolarised input state
- G02B5/3033—Polarisers, i.e. arrangements capable of producing a definite output polarisation state from an unpolarised input state in the form of a thin sheet or foil, e.g. Polaroid
- G02B5/3041—Polarisers, i.e. arrangements capable of producing a definite output polarisation state from an unpolarised input state in the form of a thin sheet or foil, e.g. Polaroid comprising multiple thin layers, e.g. multilayer stacks
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- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/133528—Polarisers
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- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K50/00—Organic light-emitting devices
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- B32B2307/40—Properties of the layers or laminate having particular optical properties
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
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Description
Y>X ・・・(1)
Y≦X+17 ・・・(2)
Y≦57 ・・・(3)
19≦X≦40 ・・・(4)
0.5mm幅の光学くしを用いた透過像鮮明度が10〜50%であり、光学機能層の最表面の表面凹凸形状を光干渉方式で計測した場合、凹凸高さが0.4μm以上である部分の面積が測定面積の3.5%以下であり、光学機能層が含有する2種類の無機微粒子が、無機ナノ粒子と膨潤性粘土とであり、光学機能層中の樹脂粒子の含有割合A(%)と、無機ナノ粒子の含有割合B(%)とが、以下の条件式(5)及び(6)を満足する。
0<B≦0.375A−2.44・・・(5)
7.0≦A≦15.0・・・(6)
|nz−nf|≧0.025 ・・・(α)
|nz−nf|≧0.035 ・・・(β)
Y>X ・・・(1)
Y≦X+17 ・・・(2)
Y≦57 ・・・(3)
19≦X≦40 ・・・(4)
25≦X≦35 ・・・(4)’
透光性基体として、厚み40μmのトリアセチルセルロースフィルムを使用した。透光性基体上に、以下の光学機能層形成用塗工液を塗布し、乾燥(溶媒を揮発)させた後、塗膜を重合により硬化させることによって、光学機能層を形成した。
・基材樹脂:UV/EB硬化性樹脂 ライトアクリレートPE−3A(ペンタエリスリトールトリアクリレート、共栄社化学株式会社製)、屈折率1.52
・樹脂フィラー:
<実施例1〜10、比較例1〜17>
架橋スチレン単分散粒子 SX350H(綜研化学株式会社製) 平均粒径3.5μm、屈折率1.595
<実施例11>
スチレン単分散フィラー SSX302ABE(積水化成品工業株式会社製) 平均粒径2.0μm、屈折率1.595
<実施例12>
架橋スチレン単分散粒子 SX500H(綜研化学株式会社製) 平均粒径5.0μm、屈折率1.595
・コロイダルシリカ:オルガノシリカゾル MEK−ST(日産化学工業株式会社製)
・合成スメクタイト:ルーセンタイト SAN(コープケミカル株式会社製)
・フッ素系レベリング剤:メガファック F−471(DIC株式会社製) 0.1%
・溶剤:トルエン
算術平均粗さRa及び最大高さRz、輪郭曲線要素の平均長さRSmは、JIS B0601:2001に従い、表面粗さ測定器(サーフコーダSE1700α、株式会社小坂研究所製)を用いて測定した。平均傾斜角度は、ASEM95に従い、上記の表面粗さ測定器を用いて測定した平均傾斜を求め、次式に従って平均傾斜角度を算出した。
平均傾斜角度=arctan(平均傾斜)
透過像鮮明度は、JIS K7105に従い、写像性測定器(ICM−1T、スガ試験器株式会社製)を用いて、光学くし幅0.5mmで測定した。
ヘイズ値は、JIS K7105に従い、ヘイズメーター(NDH2000、日本電色工業株式会社製)を用いて測定した。ここで、光学積層フィルムのヘイズ値を全ヘイズとした。また、光学積層フィルムの微細凹凸形状が設けられた表面に粘着剤付き透明性シートを貼り合わせて測定したヘイズ値から、粘着剤付き透明性シートのヘイズ値を引いた値を、内部ヘイズとした。尚、粘着剤付き透明性シートとして、ポリエチレンテレフタレートフィルム(厚さ38μm)に、アクリル系粘着剤(厚さ10μm)を塗布したものを用いた。
光学機能層の膜厚は、リニアゲージ(D−10HS、株式会社尾崎製作所製)を用いて測定した。
まず、耐ギラツキ性及びコントラストの両方を良好とする内部ヘイズ(19〜40%)を得るために必要な樹脂粒子(有機フィラー)の添加量を調べた。樹脂粒子及び2種類の無機微粒子を表1に記載の添加量で添加した樹脂塗工液を調製し、上述した作製方法にしたがって光学積層体を作製した。作製した光学積層体の内部ヘイズを求めた。
次に、樹脂粒子及び2種類の無機微粒子を表2に記載の添加量で添加した光学機能層形成用塗工液を用いて、実施例1〜12及び比較例1〜17に係る光学積層体を作製した。
耐ギラツキ性は、各実施例及び各比較例の光学積層体を透明な粘着層を介して液晶モニター(iPad3(第3世代) アップルインコーポレイテッド製、264ppi)の画面表面に貼り合わせた後、液晶モニターを緑色表示状態にし、暗室下で画面表面の中心から垂直に50cm離れた場所より液晶モニターを見た場合のギラツキの有無を任意の100人の目視判定により評価した。評価結果は、ギラツキを感じなかった人が70人以上の場合を「○」、30人以上70人未満の場合を「△」、30人未満の場合を「×」とした。
防眩性は各実施例及び各比較例の光学積層体を透明な粘着層を介して黒色アクリル板(スミペックス960 住友化学株式会社製)に貼り合せた後、黒アクリル板の中心から垂直に50cm離れた場所より照度250lxの条件下で見た場合の自分の像(顔)の黒アクリル板への写り込みの有無を任意の100人の目視判定により評価した。評価結果は、写り込みを感じなかった人が70人以上の場合を「○」、30人以上70人未満の場合を「△」、30人未満の場合を「×」とした。
輝度比は、各実施例及び各比較例の光学積層体と透光性基体を透明な粘着層を介して液晶モニター(iPad3(第3世代) アップルインコーポレイテッド製、264ppi)の画面表面に貼り合わせた後、液晶モニターを白色表示状態にし、暗室下で画面表面の中心から垂直に70cm離れた場所より分光放射計(SU−UL1R 株式会社トプコン製)にて輝度を測定した。透光性基体の輝度を100%として、93%以上の場合を「○」、93%未満の場合を「×」とした。
0<B≦0.375A−2.44 ・・・(5)
7.0≦A≦15.0 ・・・(6)
ここで、光学機能層表面の凹凸形状について説明する。
2 光学機能層
3、5、6、8 透明基材
4、7 偏光層
11、12 偏光板
13 液晶セル
14 バックライトユニット
100 光学積層体
110 偏光板
120 表示装置
Claims (6)
- 透光性基体上に光学機能層が少なくとも1層以上積層されてなる光学積層体であって、
前記光学機能層の少なくとも一方の面に凹凸形状が形成されており、
前記凹凸形状を有する光学機能層が少なくとも樹脂成分と、2種類の無機微粒子と、樹脂粒子とを含有し、
前記光学積層体が以下の条件式(1)〜(4)を満足する内部ヘイズXと、全ヘイズYとを有し、
Y>X ・・・(1)
Y≦X+17 ・・・(2)
Y≦57 ・・・(3)
19≦X≦40 ・・・(4)
0.5mm幅の光学くしを用いた透過像鮮明度が10〜50%であり、
前記光学機能層の最表面の表面凹凸形状を光干渉方式で計測した場合、凹凸高さが0.4μm以上である部分の面積が測定面積の3.5%以下であり、
前記光学機能層が含有する2種類の無機微粒子が、無機ナノ粒子と膨潤性粘土とであり、
前記光学機能層中の前記樹脂粒子の含有割合A(%)と、前記無機ナノ粒子の含有割合B(%)とが、以下の条件式(5)及び(6)を満足することを特徴とする、光学積層体。
0<B≦0.375A−2.44・・・(5)
7.0≦A≦15.0・・・(6) - 前記光学機能層が、放射線硬化型樹脂組成物を主成分とする1層以上の光学機能層からなることを特徴とする、請求項1に記載の光学積層体。
- 前記光学機能層が含有する2種類の無機微粒子が凝集体を形成していることを特徴とする、請求項1に記載の光学積層体。
- 屈折率調整層、帯電防止層、防汚層のうちの少なくとも1層を更に備える、請求項1に記載の光学積層体。
- 請求項1に記載の光学積層体を構成する前記透光性基体上に、偏光基体が積層されてなることを特徴とする、偏光板。
- 請求項1に記載の光学積層体を備えることを特徴とする、表示装置。
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KR102090810B1 (ko) | 2016-12-16 | 2020-03-18 | 주식회사 엘지화학 | 광학 필름 형성용 조성물, 광학 필름 및 이를 포함하는 편광판 |
JP6745410B2 (ja) * | 2017-08-04 | 2020-08-26 | 株式会社ダイセル | 防眩フィルム |
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JP7121479B2 (ja) * | 2017-11-14 | 2022-08-18 | 株式会社トッパンTomoegawaオプティカルフィルム | 光学積層体、偏光板及び表示装置 |
KR102098503B1 (ko) * | 2017-11-22 | 2020-04-07 | 김영수 | 편광필름을 포함하는 탈부착 디스플레이 장치 |
JP2019105694A (ja) | 2017-12-11 | 2019-06-27 | 株式会社ダイセル | 防眩フィルム並びにその製造方法及び用途 |
CN108663732B (zh) * | 2018-05-10 | 2021-09-14 | 明基材料有限公司 | 一种低雾度防眩膜及偏光板 |
US20220137266A1 (en) * | 2019-03-01 | 2022-05-05 | Dai Nippon Printing Co., Ltd. | Resin layer, optical film, and image display device |
WO2021107572A1 (ko) * | 2019-11-26 | 2021-06-03 | 주식회사 엘지화학 | 눈부심 방지 필름, 편광판 및 디스플레이 장치 |
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JPH1020103A (ja) | 1996-07-05 | 1998-01-23 | Dainippon Printing Co Ltd | 防眩フィルム |
JP2007045142A (ja) | 2005-02-22 | 2007-02-22 | Fujifilm Corp | 防眩性フィルム、反射防止フィルム、その製造方法、該フィルムを用いた偏光板および該偏光板を用いた液晶表示装置 |
WO2006090879A1 (en) * | 2005-02-22 | 2006-08-31 | Fujifilm Corporation | Film, manufacturing method thereof, polarization plate using the film, and liquid crystal, and display device using the polarizing plate |
US8431219B2 (en) * | 2007-01-22 | 2013-04-30 | Dai Nippon Printing Co., Ltd. | Optical layered body including an antiglare layer containing organic particles and nonspherical silica particles |
JP2009048092A (ja) * | 2007-08-22 | 2009-03-05 | Tomoegawa Paper Co Ltd | 光学積層体 |
JP2009150998A (ja) * | 2007-12-19 | 2009-07-09 | Sumitomo Chemical Co Ltd | 防眩フィルム、防眩性偏光板および画像表示装置 |
JP2009156939A (ja) * | 2007-12-25 | 2009-07-16 | Sumitomo Chemical Co Ltd | 防眩フィルム、防眩性偏光板および画像表示装置 |
JP2009204728A (ja) * | 2008-02-26 | 2009-09-10 | Nof Corp | 防眩性積層体及びそれを備えるディスプレイ |
JP2011013238A (ja) * | 2009-06-01 | 2011-01-20 | Tomoegawa Paper Co Ltd | 防眩フィルムおよびそれを用いた表示装置 |
TW201202763A (en) * | 2010-04-27 | 2012-01-16 | Tomoegawa Co Ltd | Optical laminate, polarizing plate and display device |
JP2011232683A (ja) * | 2010-04-30 | 2011-11-17 | Tomoegawa Paper Co Ltd | 光学積層体、偏光板および表示装置 |
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KR102443498B1 (ko) | 2022-09-15 |
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KR20220083841A (ko) | 2022-06-20 |
KR20170100555A (ko) | 2017-09-04 |
JPWO2016103685A1 (ja) | 2017-10-05 |
CN107111012A (zh) | 2017-08-29 |
KR20230052311A (ko) | 2023-04-19 |
TWI650234B (zh) | 2019-02-11 |
CN107111012B (zh) | 2020-07-28 |
TW201630743A (zh) | 2016-09-01 |
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