JPS6273206A - 導光板 - Google Patents

導光板

Info

Publication number
JPS6273206A
JPS6273206A JP60212380A JP21238085A JPS6273206A JP S6273206 A JPS6273206 A JP S6273206A JP 60212380 A JP60212380 A JP 60212380A JP 21238085 A JP21238085 A JP 21238085A JP S6273206 A JPS6273206 A JP S6273206A
Authority
JP
Japan
Prior art keywords
plate
photoconductive
light source
staircase
light
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.)
Pending
Application number
JP60212380A
Other languages
English (en)
Inventor
Toshihiko Sano
佐野　寿彦
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hitachi Ltd
Original Assignee
Hitachi Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP60212380A priority Critical patent/JPS6273206A/ja
Publication of JPS6273206A publication Critical patent/JPS6273206A/ja
Pending legal-status Critical Current

Links

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
    • G02B6/0035—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
    • G02B6/0048—Tapered light guide, e.g. wedge-shaped light guide with stepwise taper
    • 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
    • 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
    • G02B6/0066—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 characterised by the light source being coupled to the light guide
    • G02B6/007—Incandescent lamp or gas discharge lamp
    • G02B6/0071—Incandescent lamp or gas discharge lamp with elongated shape, e.g. tube
    • 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
    • G02B6/24—Coupling light guides
    • G02B6/42—Coupling light guides with opto-electronic elements
    • G02B6/4298—Coupling light guides with opto-electronic elements coupling with non-coherent light sources and/or radiation detectors, e.g. lamps, incandescent bulbs, scintillation chambers

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Light Guides In General And Applications Therefor (AREA)
  • Liquid Crystal (AREA)
  • Planar Illumination Modules (AREA)

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。

Description

【発明の詳細な説明】 〔発明の利用分野〕 本発明は、液晶バックライト用導光板に関する。
〔発明の背景〕
従来の装置は、特開昭５２−３１１３９８号に記載のよ
うに、導光板底面を鋸状に加工したものなどとなってい
た。しかし導光板上面輝度はどうしても光源側が高く輝
度均−面とはならず、また形状的に複雑で生産性の点に
ついては配慮されていなかった。
〔発明の目的〕
本発明は、導光板−に面の輝度ムラを均一なものとし、
さらに簡単な一体加工とすることで生産性を高めること
を目的としてなされたものである。
〔発明の概要〕
本発明は導光板により、蛍光ランプの光を導す１６板−
Ｌ面に放射させる際、底面を階段状に加工し５導光板−
に面から見て、いく本もの光のスジを等間隔に導光板底
面に導くことで、導光板１−血の輝度を均一化出来ると
の考えに基づいてなされたものである。
〔発明の実施例〕
以下、本発明の一実施例を第１図、第２図により説明す
る。平面光源システムの構成は第１図の平面図、第２図
の側面図で表わされるように導光板３．光源（蛍光ラン
プ）１２反射板２．拡散板４から成り、導光板３は第２
図のごとく階段状に等間隔に仕切られ水平面との角度０
は約４５°である階段面で、アルミ箭のような全反射物
５が取付けられている。また導光板３はアクリル等の屈
折率１．５程度のものが使用されてお１Ｊ、アクリル内
へ放射された光６は、階段面以外では全て全反射されア
クリル板の外へは出ない。このため、導光板ＩＩ−面部
からこの状態を見ると第１図の階段面だけが全反射物５
に反射されて光り、等間隔の線光源が導光板３１〕面か
ら見えることになる。
これら線光源から出た光６を拡散板４により拡散し均一
な面光源を得る。また構造は導光板：（、全反射物５．
拡散板４．光源１９反射板２の一体もの４ケで構成され
ており、生産性の高いものとなる。
〔発明の効果〕
本発明によれば、輝度ムラの無い均一な面光源で、生産
性の高い液晶バックライト用導光板を得られるという効
果がある。
【図面の簡単な説明】
第１図は、本発明の一実施例になる導光板の平面図、第
２図はその側断面図である。 １・・・光源（蛍光ランプ）、２・・・反射板、３・・
・導光板、４・・・拡散板、５・・・全反射物、６・・
・光、７・・・水￥　　１　　図 Ｙ　２　図 ３　　　　　　　Ｚ

Claims (1)

    【特許請求の範囲】
  1. 階段状に加工された導光板底面と、無方向性粗面化処理
    を施された導光板上面と、導光板側方に取付けられた導
    源とからなることを特徴とする導光板。
JP60212380A 1985-09-27 1985-09-27 導光板 Pending JPS6273206A (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP60212380A JPS6273206A (ja) 1985-09-27 1985-09-27 導光板

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP60212380A JPS6273206A (ja) 1985-09-27 1985-09-27 導光板

Publications (1)

Publication Number Publication Date
JPS6273206A true JPS6273206A (ja) 1987-04-03

Family

ID=16621612

Family Applications (1)

Application Number Title Priority Date Filing Date
JP60212380A Pending JPS6273206A (ja) 1985-09-27 1985-09-27 導光板

Country Status (1)

Country Link
JP (1) JPS6273206A (ja)

Cited By (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6411203A (en) * 1987-07-03 1989-01-13 Dai Ichi Seiko Co Ltd Lighting device
JPS6445003A (en) * 1987-08-13 1989-02-17 Matsushita Electric Works Ltd Panel lighting appliance
JPS6445002A (en) * 1987-08-13 1989-02-17 Matsushita Electric Works Ltd Panel lighting appliance
US5050946A (en) * 1990-09-27 1991-09-24 Compaq Computer Corporation Faceted light pipe
JPH0455002U (ja) * 1990-09-18 1992-05-12
JPH04168418A (ja) * 1990-11-01 1992-06-16 Riyoosan:Kk 光源装置
JPH0648144U (ja) * 1992-12-04 1994-06-28 サンクス株式会社 光電スイッチ
US5339179A (en) * 1992-10-01 1994-08-16 International Business Machines Corp. Edge-lit transflective non-emissive display with angled interface means on both sides of light conducting panel
US5420761A (en) * 1993-03-29 1995-05-30 Precision Lamp, Inc. Flat, thin, uniform thickness large area light source
US5485291A (en) * 1994-02-22 1996-01-16 Precision Lamp, Inc. Uniformly thin, high efficiency large area lighting panel with two facet grooves that are spaced apart and have light source facing facets with smaller slopes than the facets facing away from the light source
US5485354A (en) * 1993-09-09 1996-01-16 Precision Lamp, Inc. Flat panel display lighting system
US5506929A (en) * 1994-10-19 1996-04-09 Clio Technologies, Inc. Light expanding system for producing a linear or planar light beam from a point-like light source
US5608837A (en) * 1995-05-15 1997-03-04 Clio Technologies, Inc. Transmissive type display and method capable of utilizing ambient light
US5664862A (en) * 1994-11-29 1997-09-09 Precision Lamp, Inc. Edge light for panel display
US5671994A (en) * 1994-06-08 1997-09-30 Clio Technologies, Inc. Flat and transparent front-lighting system using microprisms
JPH1039302A (ja) * 1996-05-09 1998-02-13 Matsushita Electric Ind Co Ltd 面状照明系
US5926601A (en) * 1996-05-02 1999-07-20 Briteview Technologies, Inc. Stacked backlighting system using microprisms
JPH11202783A (ja) * 1998-01-20 1999-07-30 Sony Corp 反射型表示装置
EP0950851A1 (en) 1998-04-17 1999-10-20 Nitto Denko Corporation Light conductive plate, surface light source device, and reflection type liquid-crystal display
US6879354B1 (en) 1997-03-28 2005-04-12 Sharp Kabushiki Kaisha Front-illuminating device and a reflection-type liquid crystal display using such a device
JP2010107753A (ja) * 2008-10-30 2010-05-13 Hitachi Ltd 液晶表示装置

Cited By (26)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2540549B2 (ja) * 1987-07-03 1996-10-02 株式会社エンプラス 照明装置
JPS6411203A (en) * 1987-07-03 1989-01-13 Dai Ichi Seiko Co Ltd Lighting device
JPS6445003A (en) * 1987-08-13 1989-02-17 Matsushita Electric Works Ltd Panel lighting appliance
JPS6445002A (en) * 1987-08-13 1989-02-17 Matsushita Electric Works Ltd Panel lighting appliance
JPH0455002U (ja) * 1990-09-18 1992-05-12
US5050946A (en) * 1990-09-27 1991-09-24 Compaq Computer Corporation Faceted light pipe
JPH04168418A (ja) * 1990-11-01 1992-06-16 Riyoosan:Kk 光源装置
US5339179A (en) * 1992-10-01 1994-08-16 International Business Machines Corp. Edge-lit transflective non-emissive display with angled interface means on both sides of light conducting panel
JPH0648144U (ja) * 1992-12-04 1994-06-28 サンクス株式会社 光電スイッチ
US5420761A (en) * 1993-03-29 1995-05-30 Precision Lamp, Inc. Flat, thin, uniform thickness large area light source
US5485354A (en) * 1993-09-09 1996-01-16 Precision Lamp, Inc. Flat panel display lighting system
US5485291A (en) * 1994-02-22 1996-01-16 Precision Lamp, Inc. Uniformly thin, high efficiency large area lighting panel with two facet grooves that are spaced apart and have light source facing facets with smaller slopes than the facets facing away from the light source
US5671994A (en) * 1994-06-08 1997-09-30 Clio Technologies, Inc. Flat and transparent front-lighting system using microprisms
US5506929A (en) * 1994-10-19 1996-04-09 Clio Technologies, Inc. Light expanding system for producing a linear or planar light beam from a point-like light source
US5668913A (en) * 1994-10-19 1997-09-16 Tai; Ping-Kaung Light expanding system for producing a linear or planar light beam from a point-like light source
US5835661A (en) * 1994-10-19 1998-11-10 Tai; Ping-Kaung Light expanding system for producing a linear or planar light beam from a point-like light source
US5664862A (en) * 1994-11-29 1997-09-09 Precision Lamp, Inc. Edge light for panel display
US5608837A (en) * 1995-05-15 1997-03-04 Clio Technologies, Inc. Transmissive type display and method capable of utilizing ambient light
US5926601A (en) * 1996-05-02 1999-07-20 Briteview Technologies, Inc. Stacked backlighting system using microprisms
JPH1039302A (ja) * 1996-05-09 1998-02-13 Matsushita Electric Ind Co Ltd 面状照明系
US6879354B1 (en) 1997-03-28 2005-04-12 Sharp Kabushiki Kaisha Front-illuminating device and a reflection-type liquid crystal display using such a device
US7714956B2 (en) 1997-03-28 2010-05-11 Sharp Kabushiki Kaisha Front illuminating device and a reflection-type liquid crystal display using such a device
JPH11202783A (ja) * 1998-01-20 1999-07-30 Sony Corp 反射型表示装置
EP0950851A1 (en) 1998-04-17 1999-10-20 Nitto Denko Corporation Light conductive plate, surface light source device, and reflection type liquid-crystal display
US6196692B1 (en) 1998-04-17 2001-03-06 Nitto Denko Corporation Light conductive plate , surface light source device, and reflection type liquid-crystal display
JP2010107753A (ja) * 2008-10-30 2010-05-13 Hitachi Ltd 液晶表示装置

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