JP4432039B2 - 面状照明装置 - Google Patents
面状照明装置 Download PDFInfo
- Publication number
- JP4432039B2 JP4432039B2 JP2004135915A JP2004135915A JP4432039B2 JP 4432039 B2 JP4432039 B2 JP 4432039B2 JP 2004135915 A JP2004135915 A JP 2004135915A JP 2004135915 A JP2004135915 A JP 2004135915A JP 4432039 B2 JP4432039 B2 JP 4432039B2
- Authority
- JP
- Japan
- Prior art keywords
- guide plate
- light guide
- light
- convex portions
- prism
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 238000005286 illumination Methods 0.000 claims description 42
- 238000009826 distribution Methods 0.000 description 24
- 239000004973 liquid crystal related substance Substances 0.000 description 12
- 238000005520 cutting process Methods 0.000 description 11
- 230000003287 optical effect Effects 0.000 description 9
- 238000000034 method Methods 0.000 description 6
- 238000007788 roughening Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- 229920005989 resin Polymers 0.000 description 5
- 239000011347 resin Substances 0.000 description 5
- 230000000052 comparative effect Effects 0.000 description 4
- 238000009792 diffusion process Methods 0.000 description 4
- 239000000113 methacrylic resin Substances 0.000 description 4
- 229920005668 polycarbonate resin Polymers 0.000 description 4
- 239000004431 polycarbonate resin Substances 0.000 description 4
- 238000003754 machining Methods 0.000 description 3
- 230000003746 surface roughness Effects 0.000 description 3
- 229920002799 BoPET Polymers 0.000 description 2
- 229920005672 polyolefin resin Polymers 0.000 description 2
- 229920005990 polystyrene resin Polymers 0.000 description 2
- 230000001902 propagating effect Effects 0.000 description 2
- 241000287463 Phalacrocorax Species 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 238000004049 embossing Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 230000001678 irradiating effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 239000004645 polyester resin Substances 0.000 description 1
- 229920001225 polyester resin Polymers 0.000 description 1
- 239000000758 substrate 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
- 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
- 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
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Planar Illumination Modules (AREA)
- Liquid Crystal (AREA)
- Light Guides In General And Applications Therefor (AREA)
- Optical Elements Other Than Lenses (AREA)
Description
導光板を成形するための金型加工の際に、曲率半径が35μmの刃先を有するバイトを用い、基準面からの加工深さを25μm〜35μmの範囲内で不規則に変動させ、かつ、隣り合う溝同士の接触部分において各円弧の両側の接線角度が一致するように、加工送りを45〜65μmの範囲内で変動させて溝加工を繰返し、多条の溝を形成した。この場合、各接線角度は、40〜70度の範囲内で不規則に分布する。この金型を用いて、図11(b)にそのYZ断面を示す導光板を成形した。本比較例では、図示されるように、各凸部の断面の頂点の仮想主平面Sからの高さは、h1〜h2(25〜35μm)の範囲で不規則に分布する。この導光板を使用し、プリズムシートを、そのプリズム面を導光板の出射面に対向させ、各プリズムの延在方向が導光板上の多条の凸部の延在方向と直交するように配置して、面状照明装置を構成した。このような面状照明装置について、振動試験(振幅:1.5mm、周波数範囲:15Hz〜60Hz、周期:15分、試験時間:X、Y、Zの各方向につき1時間)およびヒートサイクル(温度範囲:−40℃〜85℃、周期:1時間、試験時間:100時間)を実施した結果、導光板の凸部の、プリズムシートのプリズムとの接触部分に傷が発生した。
11,21,31,41,51,61,71,81,91 導光板
12 点状光源
13 プリズムシート
C1〜CN 多条の凸部(円弧)
T1〜TN 多条の凸部(三角形)
P1〜PN 多条の凸部(多角形)
Claims (3)
- 導光板と、該導光板の側端面に配置された点状光源と、一方向に延在する多条のプリズムが形成されたプリズム面を有するプリズムシートとを備える面状照明装置において、
前記導光板の出射面には、前記点状光源が配置された側端面にほぼ直交する方向に延在する多条の凸部が形成され、
前記プリズムシートは、前記導光板の出射面側に、前記プリズム面を前記出射面に対向させて、前記プリズムの延在方向が前記多条の凸部の延在方向とほぼ直交するように配置されており、
前記多条の凸部を構成する各凸部は、その延在方向に垂直な断面の輪郭が同一の曲率を有する円弧からなり、それぞれの凸部の稜線が同一の仮想平面上に位置するとともに、隣り合う凸部の前記輪郭をなす円弧が交点を有し、かつ、隣り合う凸部の間隔が不規則に分布するように配列されており、
各凸部の前記輪郭をなす円弧は、両隣の円弧との交点における接線角度が互いに異なる円弧を含むとともに、隣り合う円弧の交点における該隣り合う円弧の接線角度は同一であることを特徴とする面状照明装置。 - 前記多条の凸部を構成する各凸部の前記輪郭をなす円弧の、隣り合う円弧との交点における接線角度は、40〜70度の範囲で分布することを特徴とする請求項1に記載の面状照明装置。
- 前記多条の凸部の隣り合う凸部の間隔は、10〜200μmの範囲で分布することを特徴とする請求項1または2記載の面状照明装置。
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2004135915A JP4432039B2 (ja) | 2004-04-30 | 2004-04-30 | 面状照明装置 |
US11/074,700 US7246933B2 (en) | 2004-04-30 | 2005-03-09 | Spread illuminating apparatus |
EP05005456A EP1591826B1 (en) | 2004-04-30 | 2005-03-14 | Spread illuminating apparatus |
DE602005000071T DE602005000071T2 (de) | 2004-04-30 | 2005-03-14 | Ausgedehnte Beleuchtungseinrichtung |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2004135915A JP4432039B2 (ja) | 2004-04-30 | 2004-04-30 | 面状照明装置 |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2005317435A JP2005317435A (ja) | 2005-11-10 |
JP4432039B2 true JP4432039B2 (ja) | 2010-03-17 |
Family
ID=34934241
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2004135915A Expired - Lifetime JP4432039B2 (ja) | 2004-04-30 | 2004-04-30 | 面状照明装置 |
Country Status (4)
Country | Link |
---|---|
US (1) | US7246933B2 (ja) |
EP (1) | EP1591826B1 (ja) |
JP (1) | JP4432039B2 (ja) |
DE (1) | DE602005000071T2 (ja) |
Families Citing this family (46)
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US7199868B2 (en) * | 2004-11-02 | 2007-04-03 | Identix Incorporated | High performance fingerprint imaging system |
US7347610B2 (en) * | 2005-01-26 | 2008-03-25 | Radiant Opto-Electronics Corporation | Light guide plate having light diffusing entities on light entering side |
TWI255924B (en) | 2005-03-16 | 2006-06-01 | Au Optronics Corp | Backlight module and brightness enhancement film thereof |
JP4808211B2 (ja) * | 2005-03-17 | 2011-11-02 | 富士通株式会社 | 照明装置及び液晶表示装置 |
TW200641414A (en) * | 2005-05-27 | 2006-12-01 | Innolux Display Corp | Light guide plate and backlight module using the same |
CN1932602A (zh) * | 2005-09-14 | 2007-03-21 | 鸿富锦精密工业(深圳)有限公司 | 导光板 |
TW200722852A (en) * | 2005-12-06 | 2007-06-16 | Nano Prec Corp | Edge-type backlight module |
KR20070108794A (ko) * | 2006-05-08 | 2007-11-13 | 미래나노텍(주) | 광학 시트 및 상기 광학 시트가 구비된 액정표시장치의백라이트 어셈블리 |
US20070291510A1 (en) * | 2006-06-15 | 2007-12-20 | Wintek Corporation | Backlight module and light guide plate thereof |
US7643218B2 (en) * | 2006-08-31 | 2010-01-05 | Skc Haas Display Films Co., Ltd. | Light redirecting film having varying optical elements |
JP4880697B2 (ja) | 2006-11-09 | 2012-02-22 | シャープ株式会社 | プリズムシート及び液晶表示装置 |
TW200837452A (en) * | 2007-03-12 | 2008-09-16 | Wintek Corp | Back light module |
KR100838322B1 (ko) * | 2007-03-28 | 2008-06-13 | 제일모직주식회사 | 비대칭전면프리즘을 구비하는 액정표시장치 백라이트유닛용 도광판 |
KR100912260B1 (ko) * | 2007-03-28 | 2009-08-17 | 제일모직주식회사 | 표면에 일정 조도를 갖는 액정표시장치용 광학 프리즘 시트 |
KR100905241B1 (ko) * | 2007-04-13 | 2009-07-01 | 엘지전자 주식회사 | 복수의 구조체를 포함하는 광학 필름 및 이를 포함하는백라이트 유닛 |
US7529461B1 (en) * | 2007-11-20 | 2009-05-05 | Radiant Opto-Electronics Corporation | Light guide plate with compensated emission light field |
CN101910921A (zh) * | 2007-12-20 | 2010-12-08 | 3M创新有限公司 | 具有棱镜结构的背光源反射器 |
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KR100988621B1 (ko) | 2008-05-07 | 2010-10-20 | 엘지전자 주식회사 | 광 파이프 및 이를 구비한 조명장치 |
KR100988623B1 (ko) | 2008-05-08 | 2010-10-20 | 엘지전자 주식회사 | 광 파이프 및 이를 구비한 조명장치 |
EP2141521A3 (en) * | 2008-05-15 | 2010-03-03 | LG Electronics Inc. | Light pipe and illuminating device having the same |
KR100988626B1 (ko) * | 2008-05-15 | 2010-10-18 | 엘지전자 주식회사 | 광 파이프 및 이를 구비한 조명장치 |
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-
2004
- 2004-04-30 JP JP2004135915A patent/JP4432039B2/ja not_active Expired - Lifetime
-
2005
- 2005-03-09 US US11/074,700 patent/US7246933B2/en active Active
- 2005-03-14 DE DE602005000071T patent/DE602005000071T2/de active Active
- 2005-03-14 EP EP05005456A patent/EP1591826B1/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
DE602005000071D1 (de) | 2006-09-28 |
EP1591826A1 (en) | 2005-11-02 |
US20050243575A1 (en) | 2005-11-03 |
JP2005317435A (ja) | 2005-11-10 |
US7246933B2 (en) | 2007-07-24 |
DE602005000071T2 (de) | 2007-03-15 |
EP1591826B1 (en) | 2006-08-16 |
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