JP5792464B2 - 選択的出力光束分布を有するバックライト及びそれを使用した表示システム並びにバックライトの形成方法 - Google Patents
選択的出力光束分布を有するバックライト及びそれを使用した表示システム並びにバックライトの形成方法 Download PDFInfo
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- JP5792464B2 JP5792464B2 JP2010547717A JP2010547717A JP5792464B2 JP 5792464 B2 JP5792464 B2 JP 5792464B2 JP 2010547717 A JP2010547717 A JP 2010547717A JP 2010547717 A JP2010547717 A JP 2010547717A JP 5792464 B2 JP5792464 B2 JP 5792464B2
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- 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
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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
- G02B6/0035—Means for improving the coupling-out of light from the light guide provided on the surface of the light guide or in the bulk of it
- G02B6/0045—Means for improving the coupling-out of light from the light guide provided on the surface of the light guide or in the bulk of it by shaping at least a portion of the light guide
- G02B6/0046—Tapered light guide, e.g. wedge-shaped light guide
-
- 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
- G02B6/0096—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the lights guides being of the hollow type
-
- 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
- G02F1/133611—Direct backlight including means for improving the brightness uniformity
-
- 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
- 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
- G02B6/0053—Prismatic sheet or layer; Brightness enhancement element, sheet or layer
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Nonlinear Science (AREA)
- Mathematical Physics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Planar Illumination Modules (AREA)
- Liquid Crystal (AREA)
Description
本出願は、2008年2月22日出願の米国特許仮出願第61/030767号の利益を主張し、その開示内容の全体を参照することにより本明細書に援用する。
バックライトは、バックライトの出力領域に対して光源がどこに配置されるかによって2つのカテゴリーのいずれかに分類されると考えられる。ここでバックライトの「出力領域(output area)」とは表示装置の可視領域又は区域に相当する。バックライトの「出力領域」は、本明細書では、区域又は表面自体とその区域又は表面の面積(area)(平方メートル、平方ミリメートル、平方インチなどの単位を有する数量)とを区別するために、「出力区域」又は「出力面」と呼ばれることがある。
2.前面及び背面反射体の一方又は両方の形状、
3.前面及び背面反射体の反射特性及び透過特性、
4.少なくとも1つの半鏡面要素の反射特性、及び、
5.1つ以上の光源によりキャビティ内へ放射される光の平均光束偏差角。
前面反射体としてのAPF(3M Companyから入手可能な多層反射偏光フィルム。APFは、51.0%の半球反射率を有する)及び背面反射体としてのESRを有する76.2cm(30”)のバックライトを構成した。背面反射体に対向するAPFの主表面上にビーズをコーティングした。
この実施例では、図1に例示した実施形態の背面反射体に類似の非平面状背面反射体を、傾斜面構造体をキャビティ内部にフレームと対向させて配置することにより、76.2cm(30”)のバックライトに形成した。この傾斜面は、前面反射体に平行な長さ179mmの第1部分、前面反射体に非平行な182mmの傾斜部分、及び長さ43mmの第2平行部分を有していた。傾斜部分は、背面反射体の非傾斜部分に対して3°の角度を形成していた。傾斜面を、ESRで裏張りした。比較実施例で説明したものと同一の前面反射体を、この実施例で使用した。
比較実施例で使用したものと同一のバックライト構成を、この実施例で使用した。傾斜面をキャビティから取り出した。前面反射体は、複屈折90/10coPEN材料及び非複屈折PMMA材料の274の交互層を含む非対称反射フィルムであった。274の交互マイクロ層は、連続した1/4波層対で配列され、層の厚さ勾配は、一方の偏光軸に関して約400nm〜970nmの帯域幅にわたる広く一様な強い反射共振と、その直交軸に関してより弱い反射共振と、を提供するように設計された。SA115が75%、DP2554が25%の混合物の厚さ5マイクロメートルの被膜層が、ばらつきのある交互のマイクロ層スタックの外側表面に配置された。交互マイクロ層、PBL及び被膜層を含むこの非対称反射性フィルムの全体的な厚さは、約50mmであった。このフィルムは、例えば米国特許出願第60/939,079号に記載の技法を使用して製造された。
この実施例では、実施例1の傾斜面をバックライトキャビティ内に配置した。前面反射体は、実施例2と同じであり、ビーズコーティングを含んでいた。図9の曲線908は、この実施例での出力光束分布の断面積を示している。
Claims (3)
- 出力面を含む中空の光リサイクリングキャビティを形成する、部分的透過性の前面反射体及び背面反射体であって、前記背面反射体の少なくとも第1部分は、前記前面反射体に対して非平行である、前面反射体及び背面反射体と、
前記中空の光リサイクリングキャビティ内に配置された少なくとも1つの半鏡面要素と、
前記中空の光リサイクリングキャビティ内に光を放射するために配置された1つ以上の光源であって、前記中空の光リサイクリングキャビティ内に限定された角度範囲にわたって光を放射するように構成されている、光源と、を備え、
前記背面反射体は、前記前面反射体と前記背面反射体との間で、前記出力面に対して垂直に測定した距離が、前記光リサイクリングキャビティの中央領域付近で最小である平坦部を有するバックライト。 - 所望の出力光束分布を提供するように動作可能なバックライトを形成する方法であって、
出力面を含む中空の光リサイクリングキャビティであって、部分的透過性の前面反射体及び平面状の背面反射体を更に含み、前記背面反射体は、前記前面反射体と前記背面反射体との間で、前記出力面に対して垂直に測定した距離が、前記光リサイクリングキャビティの中央領域付近で最小である平坦部を有する光リサイクリングキャビティを形成する工程と、
前記光リサイクリングキャビティ内に限定された角度範囲にわたって光を放射するための、1つ以上の光源を位置決めする工程と、
前記所望の出力光束分布を選択する工程と、
第1の出力光束分布を測定する工程と、
前記第1の出力光束分布を前記所望の光束分布と比較する工程と、
前記背面反射体を形成する工程と、
第2の出力光束分布を測定する工程と、
前記第2の出力光束分布を前記所望の出力光束分布と比較する工程と、を含む、方法。 - 表示パネルと、
前記表示パネルに光を提供するように配置されたバックライトとを備える表示システムであって、
前記バックライトは、
出力面を含む中空の光リサイクリングキャビティを形成する、部分的透過性の前面反射体及び背面反射体であって、前記背面反射体の少なくとも第1部分が、前記前面反射体に対して非平行である、前面反射体及び背面反射体と、
前記中空の光リサイクリングキャビティ内に配置された少なくとも1つの半鏡面要素と、
前記中空の光リサイクリングキャビティ内に光を放射するために配置された1つ以上の光源であって、前記中空の光リサイクリングキャビティ内に、限定された角度範囲にわたって光を放射するように構成されている、光源と、を備え、
前記背面反射体は、前記前面反射体と前記背面反射体との間で、前記出力面に対して垂直に測定した距離が、前記光リサイクリングキャビティの中央領域付近で最小である平坦部を有する、表示システム。
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
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US3076708P | 2008-02-22 | 2008-02-22 | |
US61/030,767 | 2008-02-22 | ||
PCT/US2009/034369 WO2009105450A1 (en) | 2008-02-22 | 2009-02-18 | Backlights having selected output light flux distributions and display systems using same |
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JP2011513897A JP2011513897A (ja) | 2011-04-28 |
JP2011513897A5 JP2011513897A5 (ja) | 2012-04-05 |
JP5792464B2 true JP5792464B2 (ja) | 2015-10-14 |
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US (1) | US9541698B2 (ja) |
EP (1) | EP2252828A1 (ja) |
JP (1) | JP5792464B2 (ja) |
KR (1) | KR20100126389A (ja) |
CN (1) | CN101952646B (ja) |
TW (1) | TWI494656B (ja) |
WO (1) | WO2009105450A1 (ja) |
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-
2009
- 2009-02-18 US US12/918,549 patent/US9541698B2/en not_active Expired - Fee Related
- 2009-02-18 KR KR1020107020611A patent/KR20100126389A/ko not_active Application Discontinuation
- 2009-02-18 EP EP09713533A patent/EP2252828A1/en not_active Withdrawn
- 2009-02-18 CN CN200980106059.6A patent/CN101952646B/zh not_active Expired - Fee Related
- 2009-02-18 JP JP2010547717A patent/JP5792464B2/ja not_active Expired - Fee Related
- 2009-02-18 WO PCT/US2009/034369 patent/WO2009105450A1/en active Application Filing
- 2009-02-20 TW TW098105544A patent/TWI494656B/zh not_active IP Right Cessation
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Publication number | Publication date |
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EP2252828A1 (en) | 2010-11-24 |
TWI494656B (zh) | 2015-08-01 |
US9541698B2 (en) | 2017-01-10 |
US20110096529A1 (en) | 2011-04-28 |
TW200951573A (en) | 2009-12-16 |
CN101952646B (zh) | 2014-01-29 |
KR20100126389A (ko) | 2010-12-01 |
WO2009105450A1 (en) | 2009-08-27 |
CN101952646A (zh) | 2011-01-19 |
JP2011513897A (ja) | 2011-04-28 |
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