JP4491466B2 - 電気光学装置、電子機器 - Google Patents
電気光学装置、電子機器 Download PDFInfo
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- JP4491466B2 JP4491466B2 JP2007023806A JP2007023806A JP4491466B2 JP 4491466 B2 JP4491466 B2 JP 4491466B2 JP 2007023806 A JP2007023806 A JP 2007023806A JP 2007023806 A JP2007023806 A JP 2007023806A JP 4491466 B2 JP4491466 B2 JP 4491466B2
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- Japan
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- liquid crystal
- light
- guide plate
- display panel
- light guide
- Prior art date
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- 239000004973 liquid crystal related substance Substances 0.000 claims description 106
- 238000009792 diffusion process Methods 0.000 claims description 23
- 239000011324 bead Substances 0.000 claims description 7
- 238000005286 illumination Methods 0.000 description 9
- 239000012141 concentrate Substances 0.000 description 4
- 230000007423 decrease Effects 0.000 description 4
- 230000002349 favourable effect Effects 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000000007 visual effect Effects 0.000 description 2
- 238000003491 array Methods 0.000 description 1
- 230000001413 cellular effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000003566 sealing material Substances 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 239000011882 ultra-fine particle Substances 0.000 description 1
Images
Classifications
-
- 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
-
- 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
- G02F1/133615—Edge-illuminating devices, i.e. illuminating from the side
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/04—Prisms
- G02B5/045—Prism arrays
-
- 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
- G02B6/0038—Linear indentations or grooves, e.g. arc-shaped grooves or meandering grooves, extending over the full length or width of the 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
- G02B6/0011—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
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Nonlinear Science (AREA)
- Mathematical Physics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Liquid Crystal (AREA)
- Planar Illumination Modules (AREA)
- Optical Elements Other Than Lenses (AREA)
Description
図1は、本実施形態に係る液晶装置100の断面図である。液晶装置100は、主に、照明装置10と、液晶表示パネル20より構成される。液晶表示パネル20は、ガラスなどの基板1及び2を、シール材3を介して貼り合わせてセル構造を形成し、その内部に液晶4を封入して構成される。液晶表示パネル20の前面、及び背面側には図示しない偏光板が配置されており、液晶パネル20と偏光板との間には位相差板、及び視野角補償板が設けられる。
次に、液晶装置の装置構成による視角と輝度の変化について、図3〜図8を参照しつつ述べる。図3〜図5は、液晶装置の種々の装置構成を示し、図6〜図8は、各構成の液晶装置における視角と輝度の関係を示すグラフである。図6〜図8のグラフにおいて、実線のグラフは、画面横方向の視角と輝度の関係を示すグラフであり、破線のグラフは、画面縦方向の視角と輝度の関係を示すグラフである。ここで、画面横方向とは、図3〜図5で言うと紙面横方向を示し、画面縦方向とは、図3〜図5で言うと紙面垂直方向を示す。ここで、視角とは、画面横方向における液晶装置100を見る視認する角度を示し、液晶装置では、この画面横方向における輝度が高い角度範囲を広げる必要性が高い。従って、以下では、この画面横方向の視角と輝度の関係について述べる。
図5(b)は、本実施形態に係る液晶装置100の変形例として液晶装置100eを示している。液晶装置100eは、液晶装置100において、拡散シート12、プリズムシート13を用いずに、代わりに、プリズムシート13の入射面側の面、即ち導光板11側の面に複数のビーズが塗布されたプリズムシート13bを配置した装置構成である。図8(b)は、液晶装置100eにおける視角と輝度の関係を示している。
次に、本発明に係る液晶装置100を適用可能な電子機器の具体例について図9を参照して説明する。
Claims (6)
- 光源と、
前記光源から出射された光を端面から入射し、前記端面に隣接する出光面より出光する導光板と、
前記導光板の出光面より出光された光が透過することにより照明される液晶表示パネルと、
前記導光板と前記液晶表示パネルの間に設置され、断面形状が三角形状であり、該三角形状の頂角を稜線とするプリズムが前記表示パネル側の面に複数配列されているプリズムシートと、
前記導光板と前記プリズムシートとの間に光拡散手段と、を備え、
前記プリズムは、その稜線が前記光源から出射された光の出射方向に対し交差する方向に形成され、その頂角の角度は、60〜70[°]の範囲内に設定されているとともに、
前記液晶表示パネルは、前記液晶表示パネルの垂直方向を0°としたときに、コントラスト比が10:1以上となる範囲が、前記表示パネル横方向において±60°以上であることを特徴とする電気光学装置。 - 前記導光板は、反射面に断面形状が三角形の溝が形成されており、前記三角形の溝における前記光源に近い側の面の傾斜角が0.1〜5[°]の範囲内に設定されていることを特徴とする請求項1に記載の電気光学装置。
- 前記光拡散手段は、拡散シートであり、
前記拡散シートは、その表面上に複数のビーズが塗布されていることを特徴とする請求項1又は2に記載の電気光学装置。 - 前記光拡散手段として、前記プリズムシートの前記導光板側の面に複数のビーズが塗布されていることを特徴とする請求項1又は2に記載の電気光学装置。
- 前記表示パネルの少なくとも一方の側に視野角補償層を設けてなることを特徴とする請求項1乃至4のいずれか一項に記載の電気光学装置。
- 請求項1乃至5のいずれか一項に記載の電気光学装置を表示部に備えることを特徴とする電子機器。
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2007023806A JP4491466B2 (ja) | 2006-07-31 | 2007-02-02 | 電気光学装置、電子機器 |
US11/738,117 US20080291363A1 (en) | 2006-07-31 | 2007-04-20 | Electro-optic device, electronic apparatus and illumination device |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2006207520 | 2006-07-31 | ||
JP2007023806A JP4491466B2 (ja) | 2006-07-31 | 2007-02-02 | 電気光学装置、電子機器 |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2008058931A JP2008058931A (ja) | 2008-03-13 |
JP4491466B2 true JP4491466B2 (ja) | 2010-06-30 |
Family
ID=39241670
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2007023806A Active JP4491466B2 (ja) | 2006-07-31 | 2007-02-02 | 電気光学装置、電子機器 |
Country Status (2)
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US (1) | US20080291363A1 (ja) |
JP (1) | JP4491466B2 (ja) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2120070B1 (en) * | 2008-05-16 | 2014-03-12 | LG Electronics Inc. | Optical sheet, backlight unit, and liquid crystal display |
CN101776246B (zh) * | 2010-01-28 | 2011-11-23 | 苏州奥浦迪克光电技术有限公司 | 一种导光板以及包含该导光板的照明装置与背光模组 |
JP2015195181A (ja) * | 2014-03-28 | 2015-11-05 | 大日本印刷株式会社 | 面光源装置および表示装置 |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5598280A (en) * | 1993-03-23 | 1997-01-28 | Dai Nippon Printing Co., Ltd. | Film lens and a surface light source using the same |
JPH07248494A (ja) * | 1994-03-14 | 1995-09-26 | Hitachi Ltd | 液晶表示装置 |
US5995288A (en) * | 1997-04-22 | 1999-11-30 | Dai Nippon Printing Co., Ltd. | Optical sheet optical sheet lamination light source device, and light-transmissive type display apparatus |
JP3441991B2 (ja) * | 1998-12-09 | 2003-09-02 | キヤノン株式会社 | 照明装置及びそれを用いた撮影装置 |
CN1335943B (zh) * | 1999-11-02 | 2010-05-26 | 精工爱普生株式会社 | 反射型及半透射反射型液晶装置以及电子设备 |
KR100835005B1 (ko) * | 2001-12-24 | 2008-06-04 | 엘지디스플레이 주식회사 | 백라이트 유닛 |
JP4212846B2 (ja) * | 2002-07-15 | 2009-01-21 | アルプス電気株式会社 | 照明装置及び液晶表示装置 |
KR100665871B1 (ko) * | 2005-04-21 | 2007-01-10 | 미래나노텍(주) | 액정표시장치의 백라이트 어셈블리 |
KR20070030547A (ko) * | 2005-09-13 | 2007-03-16 | 삼성전자주식회사 | 집광 부재, 이의 제조 방법 및 이를 갖는 표시 장치 |
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2007
- 2007-02-02 JP JP2007023806A patent/JP4491466B2/ja active Active
- 2007-04-20 US US11/738,117 patent/US20080291363A1/en not_active Abandoned
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JP2008058931A (ja) | 2008-03-13 |
US20080291363A1 (en) | 2008-11-27 |
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