JP2008233842A - バックライトユニット用光拡散シート - Google Patents
バックライトユニット用光拡散シート Download PDFInfo
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- JP2008233842A JP2008233842A JP2007114553A JP2007114553A JP2008233842A JP 2008233842 A JP2008233842 A JP 2008233842A JP 2007114553 A JP2007114553 A JP 2007114553A JP 2007114553 A JP2007114553 A JP 2007114553A JP 2008233842 A JP2008233842 A JP 2008233842A
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/02—Diffusing elements; Afocal elements
- G02B5/0205—Diffusing elements; Afocal elements characterised by the diffusing properties
- G02B5/0236—Diffusing elements; Afocal elements characterised by the diffusing properties the diffusion taking place within the volume of the element
- G02B5/0242—Diffusing elements; Afocal elements characterised by the diffusing properties the diffusion taking place within the volume of the element by means of dispersed particles
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/02—Diffusing elements; Afocal elements
- G02B5/0205—Diffusing elements; Afocal elements characterised by the diffusing properties
- G02B5/021—Diffusing elements; Afocal elements characterised by the diffusing properties the diffusion taking place at the element's surface, e.g. by means of surface roughening or microprismatic structures
- G02B5/0221—Diffusing elements; Afocal elements characterised by the diffusing properties the diffusion taking place at the element's surface, e.g. by means of surface roughening or microprismatic structures the surface having an irregular structure
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/02—Diffusing elements; Afocal elements
- G02B5/0205—Diffusing elements; Afocal elements characterised by the diffusing properties
- G02B5/021—Diffusing elements; Afocal elements characterised by the diffusing properties the diffusion taking place at the element's surface, e.g. by means of surface roughening or microprismatic structures
- G02B5/0226—Diffusing elements; Afocal elements characterised by the diffusing properties the diffusion taking place at the element's surface, e.g. by means of surface roughening or microprismatic structures having particles on the surface
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/02—Diffusing elements; Afocal elements
- G02B5/0273—Diffusing elements; Afocal elements characterized by the use
- G02B5/0294—Diffusing elements; Afocal elements characterized by the use adapted to provide an additional optical effect, e.g. anti-reflection or filter
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0033—Means for improving the coupling-out of light from the light guide
- G02B6/005—Means for improving the coupling-out of light from the light guide provided by one optical element, or plurality thereof, placed on the light output side of the light guide
- G02B6/0051—Diffusing sheet or layer
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- 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
- G02F1/133504—Diffusing, scattering, diffracting elements
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- 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
- G02F1/1336—Illuminating devices
- G02F1/133602—Direct backlight
- G02F1/133606—Direct backlight including a specially adapted diffusing, scattering or light controlling members
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Nonlinear Science (AREA)
- Chemical & Material Sciences (AREA)
- Mathematical Physics (AREA)
- Crystallography & Structural Chemistry (AREA)
- Dispersion Chemistry (AREA)
- Optical Elements Other Than Lenses (AREA)
- Liquid Crystal (AREA)
Abstract
【解決手段】バックライトユニット用光拡散シートにおいて、基材として、ヘイズ40〜95%、透過率50〜95%の光特性を有する内部拡散フィルム(2)と、前記内部拡散フィルム(2)上の少なくとも一面に形成された光拡散層として、バインダー樹脂(4)と屈折率が相互異なる2つ以上の透明な樹脂粒子(3a、3b、3c)により塗布された光拡散層(5)と、を含む。
【選択図】図1
Description
内部拡散フィルム(東レ(株)製:QE31-125μm、Haze:92、Transmittance:90)の一面に、下記の組成を有する塗布液をマイクログラビアを用いて光拡散シートを製造した。
塗布液の組成
−バインダー樹脂(愛敬化学製:A−811、以下同じ):18.2重量%
−硬化剤(愛敬化学製:DN980S、以下同じ):1.8重量%
−合成樹脂粒子(屈折率:1.49、単分散平均粒径15μm)18.1重量%
−合成樹脂粒子(屈折率:1.48、多分散平均粒径15μm):2.5重量%
−合成樹脂粒子(屈折率:1.59、単分散平均粒径5μm):2.5重量%
−メチルエチルケトン:28.3重量%
−トルエン:28.3重量%
−湿潤分散剤:0.3重量%
内部拡散フィルム(東レ(株)製:QE32−125μm、Haze:40、Transmittance:92)の一面に、下記の組成を有する塗布液をマイクログラビアを用いて光拡散シートを製造した。
塗布液の組成
−バインダー樹脂:18.2重量%
−硬化剤:1.8重量%
−合成樹脂粒子(屈折率:1.49、単分散平均粒径15μm):2.5重量%
−合成樹脂粒子(屈折率:1.48、多分散平均粒径15μm):18.1重量%
−合成樹脂粒子(屈折率:1.59、単分散平均粒径5μm):2.5重量%
−メチルエチルケトン:28.3重量%
−トルエン:28.3重量%
−湿潤分散剤:0.3重量%
内部拡散フィルム(東レ(株)製:PY−2−110μm、Haze:85、Transmittance:90)の一面に、下記の組成を有する塗布液をマイクログラビアを用いて光拡散シートを製造した。
塗布液の組成
−バインダー樹脂:18.2重量%
−硬化剤:1.8重量%
−合成樹脂粒子(屈折率:1.49、単分散平均粒径15μm):18.1重量%
−合成樹脂粒子(屈折率:1.48、多分散平均粒径15μm):2.5重量%
−合成樹脂粒子(屈折率:1.59、単分散平均粒径5μm):2.5重量%
−メチルエチルケトン:28.3重量%
−トルエン:28.3重量%
−湿潤分散剤:0.3重量%
内部拡散フィルム(東レ(株)製:PY−3-110μm、Haze:93、Transmittance:68)の一面に、下記の組成を有する塗布液をマイクログラビアを用いて光拡散シートを製造した。
塗布液の組成
−バインダー樹脂:18.2重量%
−硬化剤:1.8重量%
−合成樹脂粒子(屈折率:1.49、単分散平均粒径15μm):2.5重量%
−合成樹脂粒子(屈折率:1.48、単分散平均粒径15μm):18.1重量%
−合成樹脂粒子(屈折率:1.59、単分散平均粒径5μm):2.5重量%
−メチルエチルケトン:28.3重量%
−トルエン:28.3重量%
−湿潤分散剤:0.3重量%
内部拡散フィルム(東レ(株)製:PY−4−110μm、Haze:93、Transmittance:57)の一面に、下記の組成を有する塗布液をマイクログラビアを用いて光拡散シートを製造した。
塗布液の組成
−バインダー樹脂:18.2重量%
−硬化剤:1.8重量%
−合成樹脂粒子(屈折率:1.49、単分散平均粒径15μm):2.5重量%
−合成樹脂粒子(屈折率:1.48、単分散平均粒径15μm):18.1重量%
−合成樹脂粒子(屈折率:1.59、単分散平均粒径5μm):2.5重量%
−メチルエチルケトン:28.3重量%
−トルエン:28.3重量%
−湿潤分散剤:0.3重量%
実施形態1と同様の内部拡散フィルムに、屈折率が約1.49程度の同様の単分散粒子(PMMA)を塗布し、光拡散シートを製造した。
実施形態2と同様の内部拡散フィルムに、屈折率が約1.49程度の同様の粒子(PMMA)を塗布し、光拡散シートを製造した。
実施例3と同様の内部拡散フィルムに、屈折率が約1.49程度の同様の粒子(PMMA)を塗布し、光拡散シートを製造した。
実施例4と同様の内部拡散フィルムに、屈折率が約1.49程度の同様の粒子(PMMA)を塗布し、光拡散シートを製造した。
実施例5と同様の内部拡散フィルムに、屈折率が約1.49程度の同様の粒子(PMMA)を塗布し、光拡散シートを製造した。
実験例1:ヘイズ(HAZE)の評価
実施例1ないし5及び比較例1ないし5から製造された光拡散シートのヘイズ(HAZE)を評価する実験を行った。ASTM D−1003に基づいて測定し、測定機器は、日本電色工業株式会社製のモデル1000を用いた。
実施例1ないし5及び比較例1ないし5から製造された光拡散シートの遮蔽力を評価する実験を行った。トプコン社製のBM−7装備を用いてバックライト組立上の正面輝度を等間隔30Pointで測定し、式1のように定義し、数値化した。
1':透明基材フィルム
2:内部拡散フィルム
3a:単分散樹脂粒子
3b、3c:樹脂粒子
4:バインダー樹脂
5:光拡散層
Claims (4)
- バックライトユニット用光拡散シートにおいて,
基材として、ヘイズ40〜95%、透過率50〜95%の光特性を有する内部拡散フィルム(2)と、
前記内部拡散フィルム(2)上の少なくとも一面に形成された光拡散層として、バインダー樹脂(4)と屈折率が相互異なる2つ以上の透明な樹脂粒子(3a、3b、3c)により塗布された光拡散層(5)と、を含むことを特徴とする、バックライトユニット用光拡散シート。 - 前記透明な樹脂粒子は、粒径分布が平均粒径の±20%内に80%以上存在する単分散粒子と、前記単分散粒子よりも小さい平均粒径を有する粒子とが1種以上混用された粒子であることを特徴とする、請求項1に記載のバックライトユニット用光拡散シート。
- 前記単分散粒子の最大平均粒径は、10μm〜50μmであることを特徴とする、請求項1に記載のバックライトユニット用光拡散シート。
- 前記最大の単分散粒子よりも小さい平均粒径を有する粒子は、2種であり、これらの粒子の最大平均粒径はそれぞれ、3μm〜7μm、1μm〜3μmであることを特徴とする、請求項2または3に記載のバックライトユニット用光拡散シート。
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020070025969A KR20080084343A (ko) | 2007-03-16 | 2007-03-16 | 백라이트유니트용 광확산 시트 |
Publications (2)
Publication Number | Publication Date |
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JP2008233842A true JP2008233842A (ja) | 2008-10-02 |
JP4547510B2 JP4547510B2 (ja) | 2010-09-22 |
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Application Number | Title | Priority Date | Filing Date |
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JP2007114553A Active JP4547510B2 (ja) | 2007-03-16 | 2007-04-24 | バックライトユニット用光拡散シート |
Country Status (3)
Country | Link |
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JP (1) | JP4547510B2 (ja) |
KR (1) | KR20080084343A (ja) |
TW (1) | TWI334937B (ja) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2011022261A (ja) * | 2009-07-14 | 2011-02-03 | Vision Development Co Ltd | ダイヤモンドを含有する光散乱板、並びにダイヤモンド含有粒子及びその製造方法 |
US11513263B2 (en) | 2019-05-15 | 2022-11-29 | Samsung Electronics Co., Ltd. | Light-diffuser, light diffusing adhesive, light diffusing hard coat member, light diffusion film, and image forming apparatus including light diffusion film |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2010282023A (ja) * | 2009-06-04 | 2010-12-16 | Jiroo Corporate Plan:Kk | 直下型液晶表示装置用光学シート及びバックライトユニット |
JP5937357B2 (ja) * | 2009-12-17 | 2016-06-22 | 株式会社きもと | 光拡散性シート及びこれを用いたバックライト |
CN102759761B (zh) * | 2012-07-17 | 2014-10-08 | 宁波激智科技股份有限公司 | 一种高遮盖高辉度的光学薄膜及包括该光学薄膜的显示器件 |
CN104503010B (zh) * | 2014-12-23 | 2016-09-21 | 浙江大学宁波理工学院 | 一种抗划伤型光学扩散膜及其制备方法 |
CN107976730A (zh) * | 2016-10-21 | 2018-05-01 | 苏州今道创业投资有限公司 | 一种扩散膜 |
KR102062668B1 (ko) * | 2017-12-29 | 2020-01-06 | 주식회사 엘엠에스 | 차폐 성능이 향상된 확산시트 및 이를 구비한 백라이트 유닛 |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2001272508A (ja) * | 2000-03-28 | 2001-10-05 | Toray Ind Inc | 積層光拡散性フィルム |
JP2005352238A (ja) * | 2004-06-11 | 2005-12-22 | Dainippon Printing Co Ltd | 光拡散部材 |
JP2006079042A (ja) * | 2004-09-10 | 2006-03-23 | Saehan Industries Inc | 光拡散板,及び,ポリカーボネート及びコポリエステルの混合組成物 |
JP2006189883A (ja) * | 2005-01-08 | 2006-07-20 | Toray Saehan Inc | 液晶ディスプレイのバックライトユニット用光拡散シート |
-
2007
- 2007-03-16 KR KR1020070025969A patent/KR20080084343A/ko not_active Application Discontinuation
- 2007-04-24 JP JP2007114553A patent/JP4547510B2/ja active Active
- 2007-04-25 TW TW096114676A patent/TWI334937B/zh active
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2001272508A (ja) * | 2000-03-28 | 2001-10-05 | Toray Ind Inc | 積層光拡散性フィルム |
JP2005352238A (ja) * | 2004-06-11 | 2005-12-22 | Dainippon Printing Co Ltd | 光拡散部材 |
JP2006079042A (ja) * | 2004-09-10 | 2006-03-23 | Saehan Industries Inc | 光拡散板,及び,ポリカーボネート及びコポリエステルの混合組成物 |
JP2006189883A (ja) * | 2005-01-08 | 2006-07-20 | Toray Saehan Inc | 液晶ディスプレイのバックライトユニット用光拡散シート |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2011022261A (ja) * | 2009-07-14 | 2011-02-03 | Vision Development Co Ltd | ダイヤモンドを含有する光散乱板、並びにダイヤモンド含有粒子及びその製造方法 |
US11513263B2 (en) | 2019-05-15 | 2022-11-29 | Samsung Electronics Co., Ltd. | Light-diffuser, light diffusing adhesive, light diffusing hard coat member, light diffusion film, and image forming apparatus including light diffusion film |
Also Published As
Publication number | Publication date |
---|---|
KR20080084343A (ko) | 2008-09-19 |
TW200839303A (en) | 2008-10-01 |
JP4547510B2 (ja) | 2010-09-22 |
TWI334937B (en) | 2010-12-21 |
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