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JPS6273206A - Light guide plate - Google Patents

Light guide plate

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
light guide
guide plate
light
plate
present
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
Japanese (ja)
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/en
Publication of JPS6273206A publication Critical patent/JPS6273206A/en
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。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

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。[Detailed description of the invention] [Field of application of the invention] The present invention relates to a light guide plate for a liquid crystal backlight.

〔発明の背景〕[Background of the invention]

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。In conventional devices, the bottom surface of the light guide plate is machined into a saw shape, as described in Japanese Patent Laid-Open No. 52-311398. However, the brightness on the top surface of the light guide plate is inevitably high on the light source side, and the brightness level is not uniform, and the shape is complicated, so no consideration has been given to productivity.

〔発明の目的〕[Purpose of the invention]

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。The present invention makes the brightness unevenness of the surface of the light guide plate uniform,
This was done with the aim of increasing productivity through simpler integral processing.

〔発明の概要〕[Summary of the invention]

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。The present invention uses a light guide plate to guide the light of a fluorescent lamp.
When emitting radiation to the L plane, the bottom surface is processed into a step-like shape and the light guide plate 5 is used.
This was done based on the idea that the brightness of the blood on the light guide plate 1 can be made uniform by guiding a number of light streaks to the bottom surface of the light guide plate at equal intervals when viewed from above.

〔発明の実施例〕[Embodiments of the invention]

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。An embodiment of the present invention will be described below with reference to FIGS. 1 and 2. The configuration of the flat light source system is shown in the plan view of FIG. 1 and the side view of FIG. Light source (fluorescent lamp) 12 Reflector plate 2. It consists of a diffuser plate 4, and a light guide plate 3 is a second light guide plate.
As shown in the figure, it is divided into steps at equal intervals and the angle with the horizontal plane is 0.
is a staircase surface having an angle of approximately 45°, and a total reflection object 5 such as an aluminum tube is attached. The light guide plate 3 is made of a material such as acrylic with a refractive index of about 1.5 and has a refractive index of 1 J, and the light 6 emitted into the acrylic is totally reflected on surfaces other than the staircase surface and does not go out of the acrylic plate. Therefore, when looking at this state from the surface of the light guide plate II, only the step surface in FIG. 1 has a total reflection object.
The light is reflected by the light guide plate 31, and the line light sources at equal intervals are visible from the surface of the light guide plate 31.

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。The light 6 emitted from these linear light sources is diffused by a diffusion plate 4 to obtain a uniform surface light source. The structure is a light guide plate: (, total reflection object 5.
Diffusion plate 4. It is composed of four integrated light sources 19 and reflectors 2, resulting in high productivity.

〔発明の効果〕〔Effect of the invention〕

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。According to the present invention, it is possible to obtain a light guide plate for a liquid crystal backlight with high productivity using a uniform surface light source without uneven brightness.

【図面の簡単な説明】[Brief explanation of drawings]

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　　　　　　　ＺFIG. 1 is a plan view of a light guide plate according to an embodiment of the present invention, and FIG. 2 is a side sectional view thereof. 1... Light source (fluorescent lamp), 2... Reflector, 3...
・Light guide plate, 4... Diffusion plate, 5... Total reflection object, 6...
・Light, 7...Water ¥1 Figure Y 2 Figure 3 Z

Claims (1)

【特許請求の範囲】[Claims] 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。A light guide plate comprising a bottom surface of the light guide plate processed into a stepped shape, a top surface of the light guide plate subjected to non-directional roughening treatment, and a light guide source attached to the side of the light guide plate.
JP60212380A 1985-09-27 1985-09-27 Light guide plate Pending JPS6273206A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP60212380A JPS6273206A (en) 1985-09-27 1985-09-27 Light guide plate

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP60212380A JPS6273206A (en) 1985-09-27 1985-09-27 Light guide plate

Publications (1)

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

Family

ID=16621612

Family Applications (1)

Application Number Title Priority Date Filing Date
JP60212380A Pending JPS6273206A (en) 1985-09-27 1985-09-27 Light guide plate

Country Status (1)

Country Link
JP (1) JPS6273206A (en)

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
JPS6445002A (en) * 1987-08-13 1989-02-17 Matsushita Electric Works Ltd Panel lighting appliance
JPS6445003A (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 (en) * 1990-09-18 1992-05-12
JPH04168418A (en) * 1990-11-01 1992-06-16 Riyoosan:Kk Light source device
JPH0648144U (en) * 1992-12-04 1994-06-28 サンクス株式会社 Photoelectric switch
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 (en) * 1996-05-09 1998-02-13 Matsushita Electric Ind Co Ltd Planar lighting system
US5926601A (en) * 1996-05-02 1999-07-20 Briteview Technologies, Inc. Stacked backlighting system using microprisms
JPH11202783A (en) * 1998-01-20 1999-07-30 Sony Corp Reflection type display device
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 (en) * 2008-10-30 2010-05-13 Hitachi Ltd Liquid crystal display device

Cited By (25)

* 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
JPS6445002A (en) * 1987-08-13 1989-02-17 Matsushita Electric Works Ltd Panel lighting appliance
JPS6445003A (en) * 1987-08-13 1989-02-17 Matsushita Electric Works Ltd Panel lighting appliance
JPH0455002U (en) * 1990-09-18 1992-05-12
US5050946A (en) * 1990-09-27 1991-09-24 Compaq Computer Corporation Faceted light pipe
JPH04168418A (en) * 1990-11-01 1992-06-16 Riyoosan:Kk Light source device
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 (en) * 1992-12-04 1994-06-28 サンクス株式会社 Photoelectric switch
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
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
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
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 (en) * 1996-05-09 1998-02-13 Matsushita Electric Ind Co Ltd Planar lighting system
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 (en) * 1998-01-20 1999-07-30 Sony Corp Reflection type display device
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 (en) * 2008-10-30 2010-05-13 Hitachi Ltd Liquid crystal display device

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