JP4721803B2 - 面照明装置 - Google Patents
面照明装置 Download PDFInfo
- Publication number
- JP4721803B2 JP4721803B2 JP2005219815A JP2005219815A JP4721803B2 JP 4721803 B2 JP4721803 B2 JP 4721803B2 JP 2005219815 A JP2005219815 A JP 2005219815A JP 2005219815 A JP2005219815 A JP 2005219815A JP 4721803 B2 JP4721803 B2 JP 4721803B2
- Authority
- JP
- Japan
- Prior art keywords
- light
- light guide
- led
- illumination device
- leds
- 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 - Fee Related
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21K—NON-ELECTRIC LIGHT SOURCES USING LUMINESCENCE; LIGHT SOURCES USING ELECTROCHEMILUMINESCENCE; LIGHT SOURCES USING CHARGES OF COMBUSTIBLE MATERIAL; LIGHT SOURCES USING SEMICONDUCTOR DEVICES AS LIGHT-GENERATING ELEMENTS; LIGHT SOURCES NOT OTHERWISE PROVIDED FOR
- F21K9/00—Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers
- F21K9/60—Optical arrangements integrated in the light source, e.g. for improving the colour rendering index or the light extraction
- F21K9/61—Optical arrangements integrated in the light source, e.g. for improving the colour rendering index or the light extraction using light guides
-
- 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
- G02B6/0013—Means for improving the coupling-in of light from the light source into the light guide
- G02B6/0015—Means for improving the coupling-in of light from the light source into the light guide provided on the surface of the light guide or in the bulk of it
- G02B6/002—Means for improving the coupling-in of light from the light source into 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, e.g. with collimating, focussing or diverging surfaces
- G02B6/0021—Means for improving the coupling-in of light from the light source into 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, e.g. with collimating, focussing or diverging surfaces for housing at least a part of the light source, e.g. by forming holes or recesses
-
- 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
-
- 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
- G02B6/0068—Arrangements of plural sources, e.g. multi-colour light sources
-
- 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
- G02B6/0075—Arrangements of multiple light guides
- G02B6/0076—Stacked arrangements of multiple light guides of the same or different cross-sectional area
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
- H05B45/20—Controlling the colour of the light
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V2200/00—Use of light guides, e.g. fibre optic devices, in lighting devices or systems
- F21V2200/20—Use of light guides, e.g. fibre optic devices, in lighting devices or systems of light guides of a generally planar shape
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
- F21Y2113/00—Combination of light sources
- F21Y2113/10—Combination of light sources of different colours
- F21Y2113/13—Combination of light sources of different colours comprising an assembly of point-like light sources
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
- F21Y2115/00—Light-generating elements of semiconductor light sources
- F21Y2115/10—Light-emitting diodes [LED]
Landscapes
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- General Engineering & Computer Science (AREA)
- Planar Illumination Modules (AREA)
- Light Guides In General And Applications Therefor (AREA)
- Investigating Materials By The Use Of Optical Means Adapted For Particular Applications (AREA)
- Illuminated Signs And Luminous Advertising (AREA)
Description
しかも、最近では高輝度LEDが開発されているので、LEDとしてこれらを配列することにより照明光源として十分な明るさも確保できる。
このため、側面にRGBの各色LEDを順に配列したり、個々の素子内にRGBチップが配されたカラーLEDを配列して、各色ごとに光量制御を行うことにより、任意の色で発光可能にした照明装置も提案されている。
さらに、単色照明を行う場合に、高輝度の光を照射させるには高輝度LEDを使用せざるを得ず、輝度は使用するLEDの各素子の光学特性に依存するため、それ以上の明るさで発光させることができない。
これにより、発光方向に沿って配列されたLED4R、4G、4Bの発光波長の組み合わせが、各列とも等しく選定されることとなる。
この散乱凹部9…は、LED装着面3と平行な線状に形成され、且つ、LED装着面3から離れるにしたがってピッチが狭くなるように形成されている。
このように、線状の散乱凹部9…のピッチを変化させることにより、LED装着面3に近い側は散乱光の量を少なくし、LED装着面3から遠くなるにつれて散乱光の量を多くすることにより、発光面5から均一な散乱光が照射させることができる。
円錐形状のピットを連続形成した場合は、V字溝に比して、LED4R、4G、4Bから入射された光をよりランダムに散乱させることができ、これにより発光面2から照射される光の均一性が向上する。
これにより、発光面2及びLED装着面3以外の面に光散乱板が密着されて、これら各面から外部に出射される散乱光を導光体B内部に反射させ、その一部を照明光として有効利用することができる。
面照明装置1は、透明導光体Bが3層に積層された導光板6R、6G、6Bでなり、夫々の底面8に各LED4R、4G、4Bから入射された光を散乱させる散乱凹部9…が形成されているので、各色のLEDから照射された光は散乱凹部9…で散乱され、その一部が導光板6R、6G、6Bの発光面5を通り、導光体Bの発光面2に向かう。
また、導光体Bの発光面2以外の面に達した光は、ケーシング10により導光体B内部に反射され、その一部が照明光として有効利用される。
このとき、各色LED4R、4G、4Bは近接させて配列することができるので、RGBのLEDを一列に並べるときのように同色のLEDとの間に3ピッチ分もの間隔が形成されることがなく、輝度ムラを生じないので、均一な単色照明が得られる。
また、一色あたりの素子数を減らすこともないので、輝度が低下することもない。
各色のLED4R、4G、4Bを配列した導光板6R、6G、6Bは発光方向に対して前後に配設されているので、色ムラを起こすことがなく、発光面3から均一な混色光を出射させることができる。
このとき、必要に応じて各色LED4R、4G、4Bの光量をコントロールすれば、任意の色の照明光を照射することができる。
また、LEDは二色以上であれば三色に限られるものではなく、さらに、可視光に限らず発光波長が異なるものであれば赤外光や紫外光を発光するものであってもよい。
さらに、駆動回路11R、11G、11Bは、点灯/消灯のみを行い、光量のコントロールを行わないものであっても良い
2 発光面
3 LED装着面
B 透明導光体
4R、4G、4B LED
5 発光面
6R、6G、6B 透明導光板
7 LED装着孔
8 底面
9 散乱凹部
10 ケーシング
11R、11G、11B 駆動回路
Claims (6)
- 正面を発光面とし、少なくとも一側面をLED装着面とする透明導光体に、発光波長の異なる複数種類のLEDが装着され、各LEDからの照射光を導光体内部で散乱させて前記発光面から出射する面照明装置において、
前記透明導光体は、RGB各色のLEDを装着した三層の透明導光板がその発光面を正面に向けて積層されて成り、
前記各透明導光板には、LED装着面となる各導光板の側面に前記LEDが所定ピッチで装着されると共に、発光方向に沿って配列されたLEDの発光波長の組み合わせが、各列とも等しく選定されていることを特徴とする面照明装置。 - 前記LEDを発光波長ごとに点灯/消灯し、または、調光する駆動回路を備えた請求項1記載の面照明装置。
- 前記各導光板の底面部に、前記LEDから入射された光を散乱させる散乱凹部が形成された請求項1記載の面照明装置。
- 前記散乱凹部が、LED装着面と平行な線状に形成され、且つ、LED装着面から離れるにしたがってピッチが狭くなるように形成された請求項1記載の面照明装置。
- 前記線状の散乱凹部が、その長手方向にドット状のピットを連続形成して成る請求項4記載の面照明装置。
- 前記透明導光体の発光面及びLED装着面以外の面が光散乱板で囲まれて成る請求項1記載の面照明装置。
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2005219815A JP4721803B2 (ja) | 2005-07-29 | 2005-07-29 | 面照明装置 |
| TW095124596A TW200716915A (en) | 2005-07-29 | 2006-07-06 | Planar illuminating device |
| KR1020060064827A KR20070014974A (ko) | 2005-07-29 | 2006-07-11 | 면 조명 장치 |
| CNA2006101081514A CN1912457A (zh) | 2005-07-29 | 2006-07-28 | 面照明装置 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2005219815A JP4721803B2 (ja) | 2005-07-29 | 2005-07-29 | 面照明装置 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2007033347A JP2007033347A (ja) | 2007-02-08 |
| JP4721803B2 true JP4721803B2 (ja) | 2011-07-13 |
Family
ID=37721467
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2005219815A Expired - Fee Related JP4721803B2 (ja) | 2005-07-29 | 2005-07-29 | 面照明装置 |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JP4721803B2 (ja) |
| KR (1) | KR20070014974A (ja) |
| CN (1) | CN1912457A (ja) |
| TW (1) | TW200716915A (ja) |
Families Citing this family (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR200445445Y1 (ko) * | 2007-06-22 | 2009-07-30 | 팀윈 옵토 일렉트로닉스 컴퍼니 리미티드 | 다기능 led 조명등 |
| US7845826B2 (en) * | 2008-01-15 | 2010-12-07 | Skc Haas Display Films Co., Ltd. | Multilayered integrated backlight illumination assembly |
| JP2010190786A (ja) * | 2009-02-19 | 2010-09-02 | Takeda Chem Ind Ltd | 固形製剤の印字検査方法及び装置 |
| CN101986020B (zh) * | 2009-07-29 | 2012-04-18 | 苏州向隆塑胶有限公司 | 消除搭接式背光模块色差的方法 |
| JP4630945B1 (ja) * | 2010-02-19 | 2011-02-09 | 株式会社ヒューテック | 欠陥検査装置 |
| CN101986014B (zh) * | 2010-11-04 | 2012-06-20 | 友达光电股份有限公司 | 侧边式光源模块 |
| CN103090202B (zh) * | 2011-10-27 | 2015-01-14 | 东莞市奥普特自动化科技有限公司 | 一种无影照明装置 |
| KR101411460B1 (ko) * | 2012-04-03 | 2014-06-27 | 주식회사 노블바이오 | Led를 이용한 트랜스 일루미네이터 |
| CN202837583U (zh) * | 2012-05-04 | 2013-03-27 | 深圳安嵘光电产品有限公司 | 一种组合式导光板及照明灯具 |
| US8896827B2 (en) * | 2012-06-26 | 2014-11-25 | Kla-Tencor Corporation | Diode laser based broad band light sources for wafer inspection tools |
| CN103322763A (zh) * | 2013-06-03 | 2013-09-25 | 青岛海尔特种电冰箱有限公司 | 冰箱照明装置以及冰箱 |
| CN107816665B (zh) * | 2017-11-02 | 2020-01-07 | 深圳市众铭安科技有限公司 | 一种高色域蓝绿led背光模组及其制作方法 |
| JP6859962B2 (ja) | 2018-01-10 | 2021-04-14 | オムロン株式会社 | 画像検査装置および照明装置 |
| CN214425903U (zh) * | 2021-02-01 | 2021-10-19 | 漳州立达信光电子科技有限公司 | 一种面板灯 |
| KR102764956B1 (ko) * | 2024-02-15 | 2025-02-18 | 주식회사 알트시스템 | 포토메트릭용 led 도광판, 이를 포함하는 포토메트릭 시스템 및 이를 이용한 결함 판정방법 |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11125818A (ja) * | 1997-10-23 | 1999-05-11 | Hitachi Ltd | 液晶表示装置 |
| JPH11353920A (ja) * | 1998-06-05 | 1999-12-24 | Citizen Electronics Co Ltd | 多色発光型面状光源ユニット |
| JP2003187623A (ja) * | 2001-12-18 | 2003-07-04 | Sharp Corp | 照明装置及びこれを用いた表示装置 |
| JP2004127745A (ja) * | 2002-10-03 | 2004-04-22 | Sanyo Electric Co Ltd | 面光源装置 |
| JP4122964B2 (ja) * | 2002-12-20 | 2008-07-23 | 豊田合成株式会社 | ライセンスプレート照明装置 |
| JP4192697B2 (ja) * | 2003-06-24 | 2008-12-10 | 凸版印刷株式会社 | 導光体、照明装置、およびカラー画像表示体 |
| JP2005135760A (ja) * | 2003-10-30 | 2005-05-26 | Seiko Instruments Inc | 面光源装置およびこれを用いた表示装置 |
-
2005
- 2005-07-29 JP JP2005219815A patent/JP4721803B2/ja not_active Expired - Fee Related
-
2006
- 2006-07-06 TW TW095124596A patent/TW200716915A/zh unknown
- 2006-07-11 KR KR1020060064827A patent/KR20070014974A/ko not_active Ceased
- 2006-07-28 CN CNA2006101081514A patent/CN1912457A/zh active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| JP2007033347A (ja) | 2007-02-08 |
| TW200716915A (en) | 2007-05-01 |
| CN1912457A (zh) | 2007-02-14 |
| KR20070014974A (ko) | 2007-02-01 |
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