JP2006156192A - Lighting unit and lighting system equipped with it - Google Patents

Lighting unit and lighting system equipped with it Download PDF

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JP2006156192A
JP2006156192A JP2004346543A JP2004346543A JP2006156192A JP 2006156192 A JP2006156192 A JP 2006156192A JP 2004346543 A JP2004346543 A JP 2004346543A JP 2004346543 A JP2004346543 A JP 2004346543A JP 2006156192 A JP2006156192 A JP 2006156192A
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Prior art keywords
light
light emitting
reflecting
unit
illuminance
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JP2004346543A
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JP3694310B1 (en
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Toshio Hiratsuka
利男 平塚
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MIRAI KK
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MIRAI KK
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Priority to JP2004346543A priority Critical patent/JP3694310B1/en
Application filed by MIRAI KK filed Critical MIRAI KK
Priority to US11/596,814 priority patent/US20070230171A1/en
Priority to CNB200580016064XA priority patent/CN100510518C/en
Priority to KR1020067024265A priority patent/KR100784596B1/en
Priority to EP05783190A priority patent/EP1818607A4/en
Priority to TW094131419A priority patent/TWI303701B/en
Priority to PCT/JP2005/016848 priority patent/WO2006059422A1/en
Priority to EP09150191A priority patent/EP2039991A3/en
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Publication of JP3694310B1 publication Critical patent/JP3694310B1/en
Priority to MYPI20055596A priority patent/MY138360A/en
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    • 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
    • F21V19/00—Fastening of light sources or lamp holders
    • F21V19/001—Fastening of light sources or lamp holders the light sources being semiconductors devices, e.g. LEDs
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S4/00—Lighting devices or systems using a string or strip of light sources
    • F21S4/20—Lighting devices or systems using a string or strip of light sources with light sources held by or within elongate supports
    • F21S4/28—Lighting devices or systems using a string or strip of light sources with light sources held by or within elongate supports rigid, e.g. LED bars
    • 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
    • F21V17/00—Fastening of component parts of lighting devices, e.g. shades, globes, refractors, reflectors, filters, screens, grids or protective cages
    • F21V17/10—Fastening of component parts of lighting devices, e.g. shades, globes, refractors, reflectors, filters, screens, grids or protective cages characterised by specific fastening means or way of fastening
    • F21V17/16—Fastening of component parts of lighting devices, e.g. shades, globes, refractors, reflectors, filters, screens, grids or protective cages characterised by specific fastening means or way of fastening by deformation of parts; Snap action mounting
    • F21V17/164—Fastening of component parts of lighting devices, e.g. shades, globes, refractors, reflectors, filters, screens, grids or protective cages characterised by specific fastening means or way of fastening by deformation of parts; Snap action mounting the parts being subjected to bending, e.g. snap joints
    • 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
    • F21V7/00—Reflectors for light sources
    • F21V7/005—Reflectors for light sources with an elongated shape to cooperate with linear 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
    • F21Y2103/00—Elongate light sources, e.g. fluorescent tubes
    • F21Y2103/10—Elongate light sources, e.g. fluorescent tubes comprising a linear array of point-like light-generating elements
    • 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]

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
  • Fastening Of Light Sources Or Lamp Holders (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide a lighting unit capable of providing a lighting area having a certain flat illuminance distribution with high illuminance while saving power, and of extending an radiation distance; and to provide a lighting system equipped with it. <P>SOLUTION: This lighting unit 100 using light emitting diodes 17 as emission light sources is provided with: a light emission part 21 composed by arranging the plurality of light emitting diodes 17 on a base 19; first reflection parts 25 mounted respectively corresponding to the plurality of light emitting diodes 17 on the light emission side of the light emission part 21 for reflecting the light rays from the light emitting diodes 17 toward the light emission side by making them nearly parallel with one another; and a second reflection part 27 mounted on the light emission side relative to the first reflection parts 25 for reflecting the light rays from the light emitting diodes 17 without entering the first reflection parts 25 toward the light emission side by making them nearly parallel with one another. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

本発明は、ＬＥＤを光源とした照明ユニット及びこれを備えた照明装置に関する。   The present invention relates to an illumination unit using an LED as a light source and an illumination device including the illumination unit.

従来より、照明用の光源として発熱電球や蛍光灯等が広く一般的に使用されている。しかし、ＣＯ２削減等の環境問題に配慮し、できるだけ消費電力の少ない光源が望まれている。このようなニーズから、近年、ＬＥＤ（発光ダイオード）が、検査用光源等の特定利用分野から一般的な照明用光源として利用することが注目されている。ＬＥＤは、高輝度でありながら発熱量が少なく、省電力化に適した光源であるばかりか、紫外線や赤外線を殆ど含まないため、照射対象物を痛めることが殆どない利点がある。従来の照明装置の一例として、複数のＬＥＤにより構成した照明装置が例えば特許文献１に開示されている。 Conventionally, exothermic bulbs, fluorescent lamps and the like have been widely used as illumination light sources. However, in consideration of environmental problems such as CO 2 reduction, a light source that consumes as little power as possible is desired. In view of these needs, in recent years, attention has been focused on the use of LEDs (light emitting diodes) as general illumination light sources from specific application fields such as inspection light sources. An LED is not only a light source suitable for power saving while having a high luminance while having a high luminance, and also has an advantage of hardly damaging an irradiation object because it hardly contains ultraviolet rays or infrared rays. As an example of a conventional lighting device, for example, Patent Literature 1 discloses a lighting device configured by a plurality of LEDs.

特開２０００−０２１２０９号公報JP 2000-021209 A

ところが、上記特許文献１のように、ＬＥＤを光源とした照明装置においては、ＬＥＤを単体或いは複数個をアレイ状として照明装置を構成した場合、ＬＥＤ自体の照度角が広いと照明光の照射領域が広がる反面、光源から離れるに従って照度が著しく低下し、照明装置としての性能を満足し得ない。その場合には、ＬＥＤ自体の発光を高輝度化すればよいが、装置の大型化と消費電力の増大による不利が避けられない問題となる。   However, in the illumination device using LEDs as the light source as in Patent Document 1 above, when the illumination device is configured with a single LED or a plurality of LEDs in an array shape, the illumination area is illuminated when the illumination angle of the LED itself is wide. However, as the distance from the light source increases, the illuminance decreases significantly, and the performance as a lighting device cannot be satisfied. In that case, it is only necessary to increase the brightness of the light emitted from the LED itself.

図１５にＬＥＤ８１を反射板を設けることなく単体で発光させたときの所定距離を隔てた面上における照度分布を示した。図示のように、所定距離だけ離れた面上では、ＬＥＤ８１を単体で発光させた場合、低い照度でブロードな光量分布となる。一方、ＬＥＤ８１の光出射側に平板状の反射板を取り付けて、被照明物の方向とは異なる方向（光源側方等）に出射した光を被照明物側に偏向させて光を有効利用する方法がある。しかし、単に平板状の反射板をＬＥＤ８１に取り付けても、一旦拡散した光束を特定の領域に均一に集めることは困難で、また十分な照度を得ることができない。   FIG. 15 shows the illuminance distribution on the surface separated by a predetermined distance when the LED 81 emits light alone without providing a reflector. As shown in the figure, when the LED 81 is caused to emit light alone on a surface separated by a predetermined distance, a broad light amount distribution is obtained with low illuminance. On the other hand, a flat reflector is attached to the light emitting side of the LED 81, and light emitted in a direction different from the direction of the object to be illuminated (such as the side of the light source) is deflected toward the object to be illuminated to effectively use the light. There is a way. However, even if a flat reflector is simply attached to the LED 81, it is difficult to uniformly collect once diffused light flux in a specific region, and sufficient illuminance cannot be obtained.

一般に、照明用光源としては、高い照度でかつ平坦な照度分布を有する照明領域の得られる光源が求められている。そこで、図１５（ｂ）に示すように、ＬＥＤ８１の側方（或いは背面側等）に凹面状の放物面を有する反射板８３を設けることにより、ＬＥＤ８１からの光を、この反射板８３によって平行光化して光束密度を上げることができる。また、この反射板８３により、光の到達距離をある程度伸ばすことができる。しかながら、ＬＥＤ８１の側方に出射した光成分８５は反射板８３により偏向されるが、反射板８３に照射しなかった光成分８６は拡散しながら光路前方に進む。このため、光源全体として照度分布は反射板８３により照度アップが図られるが、依然としてブロードな分布を呈したままとなり、照明に必要となる高照度で平坦照度分布の照明領域が十分に得られない。また当然ながら、ＬＥＤ８１が１０゜程度の小さな照度角である場合には、反射板８３にＬＥＤ８１からの出射光が照射されずに、実質的に偏向に寄与しない成分が多くなり、照度の向上は望めない。   In general, as a light source for illumination, a light source capable of obtaining an illumination region having a high illuminance and a flat illuminance distribution is required. Therefore, as shown in FIG. 15B, by providing a reflecting plate 83 having a concave parabolic surface on the side (or the back side or the like) of the LED 81, the light from the LED 81 is transmitted by the reflecting plate 83. The light beam density can be increased by parallel light. In addition, the reflection plate 83 can extend the reach of light to some extent. However, although the light component 85 emitted to the side of the LED 81 is deflected by the reflecting plate 83, the light component 86 that has not been irradiated to the reflecting plate 83 travels forward in the optical path while diffusing. For this reason, the illuminance distribution of the entire light source can be increased by the reflector 83, but it still exhibits a broad distribution, and a high illuminance and flat illuminance distribution illumination area necessary for illumination cannot be obtained sufficiently. . Of course, when the LED 81 has a small illuminance angle of about 10 °, the reflection plate 83 is not irradiated with the light emitted from the LED 81, and there are many components that do not substantially contribute to deflection, and the illuminance is improved. I can't hope.

また、光の到達距離を伸ばすには、レンズを用いることも考えられるが、レンズを配置することによる部品点数増加に伴うコストアップと、組み立て性の低下と、光軸調整等の余分な作業が必要になる点が問題となり、照明装置を低コストで実現するには課題が多い。   In order to extend the reach of light, it is conceivable to use a lens, but the cost increases due to the increase in the number of parts due to the arrangement of the lens, the assembling performance is reduced, and extra work such as optical axis adjustment is required. The necessary point becomes a problem, and there are many problems in realizing the lighting device at low cost.

本発明は、上述した事情に鑑みてなされたものであり、その目的は、省電力化を図りつつ、高い照度で一定の平坦照度分布の照明領域が得られ、照射距離を伸ばすことができる照明ユニット及びこれを備えた照明装置を提供することにある。   The present invention has been made in view of the above-described circumstances, and an object of the present invention is to provide an illumination area having a uniform flat illuminance distribution with a high illuminance and extending an irradiation distance while saving power. It is in providing a unit and an illuminating device provided with the unit.

本発明に係る上記目的は下記構成により達成される。
（１） 発光ダイオードを発光光源とした照明ユニットであって、複数の発光ダイオードを基台に配設した発光部と、前記発光部の光出射側に前記複数の発光ダイオードそれぞれに対応して設けられ、前記発光ダイオードからの光を光出射側に向けて略平行化して反射する第１反射部と、前記第１反射部のさらに光出射側に設けられ、前記第１反射部に入射しなかった前記発光ダイオードからの光を光出射側に向けて略平行化して反射する第２反射部と、を備えたことを特徴とする照明ユニット。 The above object of the present invention is achieved by the following configuration.
(1) An illumination unit using a light emitting diode as a light emitting light source, wherein a light emitting unit having a plurality of light emitting diodes arranged on a base, and a light emitting side of the light emitting unit corresponding to each of the plurality of light emitting diodes A first reflecting part that reflects the light from the light emitting diode substantially parallel to the light emitting side and is reflected on the light emitting side of the first reflecting part, and is not incident on the first reflecting part. And a second reflecting portion for reflecting the light from the light emitting diode substantially parallel and reflecting toward the light emitting side.

この照明ユニットによれば、第１反射部が発光ダイオードからの光を光出射側に向けて略平行化して反射させ、第２反射部が第１反射部に入射しなかった発光ダイオードからの光を光出射側に向けて略平行化して反射させることにより、省電力でありながら、高い照度でかつ照度分布を均一にすることができ、照射距離を伸ばすことができる。   According to this illumination unit, the light from the light-emitting diode whose first reflecting portion reflects the light from the light-emitting diode substantially parallel to the light emitting side and the second reflecting portion does not enter the first reflecting portion. By making the light substantially parallel and reflected toward the light emitting side, it is possible to make the illuminance distribution uniform with a high illuminance while extending the irradiation distance while saving power.

（２） （１）記載の照明ユニットであって、前記第１反射部が、前記発光ダイオードの発光面を焦点位置とする放物面からなる反射面を有することを特徴とする照明ユニット。 (2) The illumination unit according to (1), wherein the first reflecting section has a reflecting surface made of a paraboloid having a light emitting surface of the light emitting diode as a focal position.

この照明ユニットによれば、第１反射部の反射面が放物面であることにより、発光ダイオードからの光を反射した際に、高精度で平行光を生成することができる。これにより、反射光の拡散が抑えられ、照度を向上させることができる。   According to this illumination unit, when the reflection surface of the first reflection unit is a parabolic surface, parallel light can be generated with high accuracy when light from the light emitting diode is reflected. Thereby, diffusion of reflected light is suppressed and illuminance can be improved.

（３） （１）又は（２）記載の照明ユニットであって、前記第２反射部が、前記発光ダイオードの配列方向に対して平行に配置された平板状の反射面を有することを特徴とする照明ユニット。 (3) The illumination unit according to (1) or (2), wherein the second reflecting portion has a flat reflecting surface arranged in parallel to the arrangement direction of the light emitting diodes. Lighting unit.

この照明ユニットによれば、第２反射部の反射面が平板状であることにより、第１反射部に照射されなかった発光ダイオードからの光を反射した際に、その反射光を平行光化して照射範囲の境界を明瞭にすることができる。   According to this lighting unit, when the light from the light emitting diode that has not been irradiated onto the first reflecting portion is reflected, the reflected light is collimated when the reflecting surface of the second reflecting portion is flat. The boundary of the irradiation range can be made clear.

（４） （１）〜（３）のいずれか１項記載の照明ユニットと、前記発光ダイオードを発光駆動するための電力を供給する駆動部と、を備えたことを特徴とする照明装置。 (4) An illumination device comprising: the illumination unit according to any one of (1) to (3); and a drive unit that supplies electric power for driving the light emitting diode to emit light.

この照明装置によれば、駆動部による電力供給によって、省電力でありながら、高い照度でかつ照度分布を均一に照明することができ、照射距離を伸ばすことができる。   According to this illuminating device, it is possible to uniformly illuminate an illuminance distribution with high illuminance while extending power by supplying power from the drive unit, and extending the irradiation distance.

さらに、上記の照明ユニット及びこれを備えた照明装置において、照明ユニットが、前記平板状の反射面が前記発光ダイオードの配列方向とは直交する方向に前記第１反射部を挟んで一対設けることにより、双方の反射面からの光が集光されて照度が高められる。
また、前記第１反射部と前記第２反射部とを一体成形品とすることが好ましい。これによれば、樹脂材料を射出成形法により一体成形して、第１反射部及び第２反射部それぞれの形状を簡単にして高精度に形成することができる。また、相互の位置関係を設計通りに作り込むことができ、もって、発光ダイオードからの光を高精度で偏向できる。 Furthermore, in the illumination unit and the illumination device including the illumination unit, the illumination unit is provided with a pair of the flat reflection surfaces sandwiching the first reflection unit in a direction perpendicular to the arrangement direction of the light emitting diodes. , The light from both reflecting surfaces is collected, and the illuminance is increased.
In addition, it is preferable that the first reflecting portion and the second reflecting portion are an integrally molded product. According to this, the resin material can be integrally formed by an injection molding method, and the shapes of the first reflecting portion and the second reflecting portion can be simplified and formed with high accuracy. In addition, the mutual positional relationship can be created as designed, so that the light from the light emitting diode can be deflected with high accuracy.

また、前記第１反射部と前記第２反射部の少なくともいずれかの反射面が、なし地状に形成されてもよい。これにより、光の拡散効果を持たせて、照射領域を広くかつ均一にできる。
また、発光ダイオードの配列が円環状であってもよい。これにより、広範囲な照射領域を確保しつつ照明ユニットを小型化できる。 Further, at least one of the reflection surfaces of the first reflection part and the second reflection part may be formed in a ground shape. Thereby, the irradiation region can be made wide and uniform with a light diffusion effect.
The arrangement of the light emitting diodes may be annular. Thereby, a lighting unit can be reduced in size, ensuring a wide irradiation area | region.

本発明によれば、省電力化を図りつつ、高い照度で一定の平坦照度分布の照明領域が得られ、照射距離を伸ばすことができる。これにより、照明のエネルギ効率が向上して、ＣＯ2排出削減等の環境問題に及ぼす影響を大きく削減することができる。 According to the present invention, it is possible to obtain an illumination area having a constant flat illuminance distribution at a high illuminance while saving power, and the irradiation distance can be extended. Thereby, the energy efficiency of illumination can be improved and the influence on environmental problems such as CO 2 emission reduction can be greatly reduced.

以下、本発明に係る照明ユニット及びこれを備えた照明装置の好適な実施の形態について、図面を参照して詳細に説明する。
（第１実施形態）
図１は本発明に係る照明装置の第１実施形態を示す全体構成図である。
本発明に係る第１実施形態の照明装置２００は、照明ユニット１００と、駆動部１１とを有して構成されている。
駆動部１１は、照明ユニット１００に発光駆動電力を供給するものであり、例えばフルレンジトランス等を用いることができる。駆動部１１は商用電源に接続し、商用電源からの例えばＡＣ１１０Ｖ〜２２０Ｖ、５０Ｈｚ〜６０Ｈｚ等の電力を、ＤＣ１２Ｖ（ＤＣ６ＶやＤＣ２４Ｖ等の任意の電圧、或いは交流であってもよい）の駆動電圧に変換して照明ユニット１００に供給する。 DESCRIPTION OF EMBODIMENTS Hereinafter, preferred embodiments of a lighting unit according to the present invention and a lighting device including the same will be described in detail with reference to the drawings.
(First embodiment)
FIG. 1 is an overall configuration diagram showing a first embodiment of a lighting device according to the present invention.
The illuminating device 200 of 1st Embodiment which concerns on this invention has the illumination unit 100 and the drive part 11, and is comprised.
The drive unit 11 supplies light emission drive power to the illumination unit 100, and for example, a full range transformer or the like can be used. The drive unit 11 is connected to a commercial power source, and power from the commercial power source, for example, AC 110 V to 220 V, 50 Hz to 60 Hz, or the like is changed to a drive voltage of DC 12 V (any voltage such as DC 6 V or DC 24 V, or AC). The light is converted and supplied to the lighting unit 100.

照明ユニット１００は、後板１５と、多数個のＬＥＤ１７を基台である配線基板１９上に直線的に配設した発光部２１と、反射鏡部材２３とを有して構成されている。後板１５は、反射鏡部材２３との間に配線基板１９を挟み込んで反射鏡部材２３に着脱自在に組み付けられる。   The illumination unit 100 includes a rear plate 15, a light emitting unit 21 in which a large number of LEDs 17 are linearly arranged on a wiring board 19 as a base, and a reflecting mirror member 23. The rear plate 15 is detachably assembled to the reflecting mirror member 23 with the wiring board 19 interposed therebetween.

図２に照明ユニットの側面図（ａ）、下面図（ｂ）、図３に照明ユニットの分解斜視図を示した。
照明ユニット１００は、図２（ａ）に示すように、反射鏡部材２３に後板１５を組み付けた状態で高さＨを有する。高さＨは、本実施形態においては概ね２０ｍｍ程度であり、発熱電球や蛍光灯等を光源として用いた場合と比較して大幅に薄型化されている。なお、高さＨは、小さすぎると反射鏡部材２３の偏向特性が損なわれ、大きすぎると設置スペースを要して本照明ユニット１００の配置自由度が高められない。そのため、１５〜３０ｍｍ程度、特に２０〜２３ｍｍ程度が望ましい。 FIG. 2 is a side view of the lighting unit (a), a bottom view (b), and FIG. 3 is an exploded perspective view of the lighting unit.
The illumination unit 100 has a height H in a state in which the rear plate 15 is assembled to the reflecting mirror member 23 as shown in FIG. The height H is about 20 mm in the present embodiment, and is significantly thinner than when a heat-generating bulb or a fluorescent lamp is used as the light source. If the height H is too small, the deflection characteristics of the reflecting mirror member 23 are impaired. If the height H is too large, an installation space is required and the degree of freedom in arrangement of the illumination unit 100 cannot be increased. Therefore, about 15-30 mm, especially about 20-23 mm is desirable.

反射鏡部材２３は、図２（ｂ）に示すように、長尺板状の取付基部２４（図３参照）と、取付基部２４に接続され、中心位置に開口を有し光出射側が解放側となる放物面からなる反射面（放物面鏡）２５ａを複数個（本実施形態においては合計１６個）形成した第１反射部２５と、第１反射部２５のさらに光出射側に設けられ、放物面鏡２５ａの並び方向に平行な平板状の反射面（平面板鏡）２７ａを形成した第２反射部２７とを一体に有する。第２反射部２７は、放物面鏡２５ａの並び方向とは直交する方向に平面板鏡２７ａが一対形成されたもので、並び方向両脇は、第１反射部２５の放物面鏡を延長した放物面壁２７ｂで接続されている。反射鏡部材２３は、射出成形により一体成形された樹脂成形品であって、少なくとも第１反射部２５と第２反射部２７の光反射面にはアルミ蒸着等による鏡面のコーティング加工が施されている。また、光反射面としては、これに限らず、他の常套手段が利用可能である。   As shown in FIG. 2B, the reflecting mirror member 23 is connected to a long plate-like mounting base 24 (see FIG. 3) and the mounting base 24, has an opening at the center position, and the light emitting side is the release side. A first reflecting portion 25 in which a plurality of reflecting surfaces (parabolic mirrors) 25a (a total of 16 in this embodiment) are formed, and further provided on the light emitting side of the first reflecting portion 25. And a second reflecting portion 27 having a flat reflecting surface (planar mirror) 27a parallel to the direction in which the parabolic mirrors 25a are arranged. The second reflecting portion 27 is formed by a pair of plane plate mirrors 27a formed in a direction orthogonal to the direction in which the parabolic mirrors 25a are arranged, and both sides of the arranging direction are the parabolic mirrors of the first reflecting portion 25. They are connected by an extended parabolic wall 27b. The reflecting mirror member 23 is a resin molded product integrally formed by injection molding, and at least the light reflecting surfaces of the first reflecting portion 25 and the second reflecting portion 27 are subjected to mirror coating processing such as aluminum vapor deposition. Yes. Further, the light reflecting surface is not limited to this, and other conventional means can be used.

後板１５は、図３に示すように、縦断面が“く”の字状の傘部２９と、傘部２９の内側面に配線基板１９の背面側を支持するリブ３０と、傘部２９の長手方向の複数箇所（本実施形態においては５箇所）に反射鏡部材２３と係合するロック爪３１が配設されてなる。ロック爪３１は、図中上下一対の縦断面が“コ”の字状のフック形状に形成されている。   As shown in FIG. 3, the rear plate 15 includes an umbrella portion 29 having a “<” shape in the longitudinal section, a rib 30 that supports the back side of the wiring board 19 on the inner side surface of the umbrella portion 29, and the umbrella portion 29. The lock claws 31 that engage with the reflecting mirror member 23 are arranged at a plurality of locations in the longitudinal direction (5 locations in the present embodiment). The lock claw 31 is formed in a hook shape in which a pair of upper and lower vertical sections in the figure has a “U” shape.

配線基板１９は、例えばプリント基板であり、反射鏡部材２３側に長手方向に沿って個々の放物面鏡２５ａに対応して複数個（ここでは１６個）のＬＥＤ１７が直線状に実装されている。そして、配線基板１９の一端側からはリード線３３が引き出され、駆動部１１（図１参照）に接続されている。配線基板１９は、片面実装モジュールのために、障害発生時に問題点を発見し易く、メンテナンス性に優れた安全なモジュールである。   The wiring board 19 is, for example, a printed board, and a plurality (16 in this case) of LEDs 17 are linearly mounted on the reflecting mirror member 23 side along the longitudinal direction so as to correspond to the individual parabolic mirrors 25a. Yes. And the lead wire 33 is pulled out from the one end side of the wiring board 19, and is connected to the drive part 11 (refer FIG. 1). Since the wiring board 19 is a single-sided mounting module, it is a safe module that is easy to find a problem when a failure occurs and has excellent maintainability.

反射鏡部材２３は、長尺平板状に形成された取付基部２４の両端に照明ユニット１００の固定用のブラケット３７が形成されており、取付基部２４の図３における上下方向に、後板１５のロック爪３１が係合する係合部３９を設けてある。係合部３９は、配線基板１９を後板１５とで挟み込み、後板１５のロック爪３１とのスナップアクションにより脱着自在に組み合わせられる。   In the reflecting mirror member 23, brackets 37 for fixing the illumination unit 100 are formed at both ends of a mounting base 24 formed in a long flat plate shape, and the rear plate 15 is arranged in the vertical direction of the mounting base 24 in FIG. An engaging portion 39 with which the lock claw 31 is engaged is provided. The engaging portion 39 is detachably combined by sandwiching the wiring board 19 with the rear plate 15 and snapping with the lock claw 31 of the rear plate 15.

反射鏡部材２３、配線基板１９、後板１５を組み合わせたとき、第１反射部２５の放物面鏡２５ａの焦点位置にＬＥＤ１７の発光面が位置することになる。これはつまり、反射鏡部材２３には、配線基板１９表面に当接する面が離散的に配置されており、この当接面を、ＬＥＤ１７の発光面が放物面鏡２５ａの焦点位置となる高さに形成している。また、配線基板１９が反射鏡部材２３に形成された基板収容位置に納まる際、後板１５のリブ３０は、この当接面に配線基板１９を押圧するようにその高さが設定されている。   When the reflecting mirror member 23, the wiring board 19, and the rear plate 15 are combined, the light emitting surface of the LED 17 is positioned at the focal position of the parabolic mirror 25a of the first reflecting portion 25. In other words, the reflecting mirror member 23 has discretely arranged surfaces that contact the surface of the wiring board 19, and this contacting surface is a high position where the light emitting surface of the LED 17 becomes the focal position of the parabolic mirror 25 a. Is formed. Further, when the wiring board 19 is housed in the board accommodation position formed on the reflecting mirror member 23, the height of the rib 30 of the rear plate 15 is set so as to press the wiring board 19 against the contact surface. .

従って、反射鏡部材２３、配線基板１９、後板１５を単に組み合わせるだけで、放物面鏡２５ａの焦点位置とＬＥＤ１７の発光面の位置が簡単にして高精度で一致することになる。この構成により、例えばねじ等の締結手段を用いることなく簡単に組み付けでき、部品点数を減らして、組立や調整のための工程を軽減でき、生産性の向上が図られる。   Therefore, by simply combining the reflecting mirror member 23, the wiring board 19, and the rear plate 15, the focal position of the parabolic mirror 25a and the position of the light emitting surface of the LED 17 can be easily matched with high accuracy. With this configuration, for example, it is possible to easily assemble without using fastening means such as screws, reduce the number of parts, reduce the steps for assembly and adjustment, and improve productivity.

次に、上記構成の照明ユニット１００に対する光学的特性について説明する。
図４は図２に示す照明ユニットのＡ−Ａ断面図である。
照明ユニット１００の反射鏡部材２３は、第１反射部２５と第２反射部２７とが連続して形成されており、第１反射部２５の基端部には、ＬＥＤ１７の発光面を放物面鏡２５ａの焦点位置に配置させるための開口４１が設けてある。第１反射部２５の放物面鏡２５ａは、ＬＥＤ１７の発光面を焦点位置とする放物面からなる反射面を有しており、ＬＥＤ１７からの光を光出射側に向けて略平行化して反射する。 Next, optical characteristics for the illumination unit 100 having the above-described configuration will be described.
4 is a cross-sectional view of the illumination unit shown in FIG.
The reflecting mirror member 23 of the illumination unit 100 includes a first reflecting portion 25 and a second reflecting portion 27 that are continuously formed. A light emitting surface of the LED 17 is parabolically arranged at the base end portion of the first reflecting portion 25. An opening 41 is provided for placement at the focal position of the surface mirror 25a. The parabolic mirror 25a of the first reflecting unit 25 has a reflecting surface formed of a parabolic surface with the light emitting surface of the LED 17 as a focal position, and substantially parallelizes the light from the LED 17 toward the light emitting side. reflect.

また、第２反射部２７は、第１反射部２５のさらに光出射側に設けられ、放物面鏡２５ａの配列方向、即ち、ＬＥＤ１７の配列方向に対して平行に配置された平板状の平面板鏡２７ａを有している。そして、第１反射部２５に照射されなかったＬＥＤ１７からの光を受けて、光出射側に向けて略平行化して反射する。第１反射部２５は、予め定められた反射面領域Ｍ１を有し、第２反射部２７は、反射面領域Ｍ１に連続して予め定められた反射面領域Ｍ２を有するために、第１，第２反射部２５，２７によって反射された光は、大きな光量の平行光となって被照明物に照射されることになる。   The second reflecting portion 27 is further provided on the light emitting side of the first reflecting portion 25, and is a flat plate-like flat plate arranged in parallel to the arrangement direction of the parabolic mirrors 25a, that is, the arrangement direction of the LEDs 17. A face plate mirror 27a is provided. And the light from LED17 which was not irradiated to the 1st reflection part 25 is received, and it parallelizes and reflects toward the light-projection side. Since the first reflecting portion 25 has a predetermined reflecting surface region M1, and the second reflecting portion 27 has a predetermined reflecting surface region M2 continuous to the reflecting surface region M1, The light reflected by the second reflecting portions 25 and 27 is irradiated onto the object to be illuminated as a large amount of parallel light.

平面板鏡２７ａのＬＥＤ１７の光軸に対する傾斜角度は、第１反射部２５に照射されなかったＬＥＤ１７からの光束が平行光化する角度に設定される。本実施形態の場合は、ＬＥＤ１７の光軸に対して２０゜〜２７゜の範囲で傾斜角度が設定されている。   The inclination angle of the flat plate mirror 27a with respect to the optical axis of the LED 17 is set to an angle at which the luminous flux from the LED 17 that has not been irradiated onto the first reflecting portion 25 is collimated. In the present embodiment, the inclination angle is set in the range of 20 ° to 27 ° with respect to the optical axis of the LED 17.

ここで、ＬＥＤ１７は、例えば１２０°等の広い照度角を有しており、出射した光のうち、側方へ向いて出射した光成分が増加しても、第１反射部２５、第２反射部２７に捕らえられて、平行光化に寄与する割合が高くなる。これにより、照度分布の均一化効果が一層高められる。   Here, the LED 17 has a wide illuminance angle of, for example, 120 °, and even if the light component emitted toward the side out of the emitted light increases, the first reflection unit 25 and the second reflection. The ratio which is caught by the part 27 and contributes to parallel light conversion becomes high. Thereby, the effect of uniforming the illuminance distribution is further enhanced.

次に、照明ユニット１００による照度分布について説明する。
図５は上記構成の照明ユニットによる照度分布を示すグラフである。
図５に示すように、ＬＥＤ１７から直接的に照射される光成分と、第１反射部２５、第２反射部２７による反射を伴って到達した光成分からなる範囲Ｗ１における光量は、他の領域と比較して、その境界が明瞭に現れている。これは、範囲Ｗ１内に集光されて、かつ光束が略平行光とされ、放射照度が高い状態になっているためである。 Next, the illuminance distribution by the illumination unit 100 will be described.
FIG. 5 is a graph showing the illuminance distribution by the illumination unit having the above configuration.
As shown in FIG. 5, the amount of light in the range W <b> 1 composed of the light component directly irradiated from the LED 17 and the light component that arrives with reflection by the first reflection unit 25 and the second reflection unit 27 is in other regions. Compared with, the boundary clearly appears. This is because the light is condensed in the range W1 and the light flux is made substantially parallel light, and the irradiance is high.

図６はＬＥＤの点灯時に反射鏡部材を光出射側から見た状態を示す説明図である。
図６に示すように、ＬＥＤ１７の発光面１７ａは、ＬＥＤ１７の素子の中央部であり、この発光面１７ａは、第１反射部２５の放物面鏡２５ａの全面に像を映出する。また、第２反射部２７の双方の平面板鏡２７ａ，２７ａにも発光面１７ａの像を映出する。つまり、第１反射部２５だけではＬＥＤ１７からの直接照射される光の成分が拡散により広がってしまうが、第２反射部２５の平面板鏡２７ａにより、拡散して広がる光成分を偏向して平行光化する。この作用により、得られる光束の放射照度が高くなり、範囲Ｗ１内の照度分布を高く均一にすることができ、その結果、範囲Ｗ１の境界が明瞭に見えることになる。 FIG. 6 is an explanatory diagram showing a state in which the reflecting mirror member is viewed from the light emitting side when the LED is turned on.
As shown in FIG. 6, the light emitting surface 17 a of the LED 17 is a central portion of the element of the LED 17, and the light emitting surface 17 a projects an image on the entire surface of the parabolic mirror 25 a of the first reflecting unit 25. Further, the image of the light emitting surface 17 a is also projected on both the plane plate mirrors 27 a and 27 a of the second reflecting portion 27. That is, the light component directly irradiated from the LED 17 spreads by diffusion only with the first reflecting portion 25, but the light component spread and diffused is deflected and paralleled by the flat plate mirror 27a of the second reflecting portion 25. Lighten. By this action, the irradiance of the obtained light flux becomes high, and the illuminance distribution in the range W1 can be made high and uniform. As a result, the boundary of the range W1 can be clearly seen.

次に、照明ユニット１００の光到達距離について説明する。
図７は本実施形態における照明ユニットによる光源の放射輝度と光源からの距離との関係を、反射面の有無やその種類に応じて調べた概念的なグラフである。
照明装置の用途として、街路灯等の光源から長い距離を隔てて被照明物が存在する場合、或いは、工事警告灯等の遠方に向けて光源位置を知らせる場合には、光の到達距離が照明装置の性能を左右する。そこで一例として、図７に光源からの光が反射面によって到達距離に差が生じる例を示した。 Next, the light reach distance of the illumination unit 100 will be described.
FIG. 7 is a conceptual graph in which the relationship between the radiance of the light source by the lighting unit and the distance from the light source in the present embodiment is examined according to the presence or absence of the reflection surface and the type thereof.
When the object to be illuminated is present at a long distance from a light source such as a street light, or when the position of the light source is indicated toward a distant place such as a construction warning light, the light reaching distance is used as an illumination device. It affects the performance of the device. Therefore, as an example, FIG. 7 shows an example in which the light from the light source has a difference in the arrival distance depending on the reflection surface.

図７に示すように、光源位置を確認できる放射輝度の限界範囲が図中斜線部で示す範囲である場合、反射鏡を備えない場合には距離Ｌnを超えると輝度不足となる。放物面鏡のみ備えた場合には、距離Ｌnでは許容内の放射輝度を有しているが、距離Ｌpを超えると輝度不足となる。一方、本発明のような放物面鏡２５ａと平面板鏡２７ａとを共に備えた場合には、距離Ｌn、Ｌpから大きく隔てた距離Ｌppまで輝度不足を生じない。このように、本発明に係る構成の場合、光到達距離を、放物面鏡２５ａと平面板鏡２７ａとの相乗効果により、飛躍的に伸ばすことができる。例えば、光源の全光束を４２．８ｌｍとした場合、距離Ｌnが１５ｃｍで１２００ ｌｘ、距離Ｌpが３０ｃｍで１０００ ｌｘとなり、さらに、距離が３０ｍであっても２ ｌｘが得られる。   As shown in FIG. 7, when the limit range of the radiance in which the light source position can be confirmed is the range indicated by the hatched portion in the drawing, the luminance is insufficient when the distance Ln is exceeded when the reflecting mirror is not provided. When only the parabolic mirror is provided, the radiance is within the allowable range at the distance Ln, but the luminance becomes insufficient when the distance Lp is exceeded. On the other hand, when both the parabolic mirror 25a and the flat plate mirror 27a are provided as in the present invention, insufficient luminance does not occur up to a distance Lpp that is greatly separated from the distances Ln and Lp. Thus, in the case of the configuration according to the present invention, the light arrival distance can be dramatically increased by the synergistic effect of the parabolic mirror 25a and the flat plate mirror 27a. For example, when the total luminous flux of the light source is 42.8 lm, the distance Ln is 1200 lx when the distance Ln is 15 cm, the distance Lp is 1000 lx when the distance is 30 cm, and 2 lx is obtained even when the distance is 30 m.

以上説明したように、本実施形態に係る照明ユニット１００及びこれを備えた照明装置２００によれば、第１反射部２５がＬＥＤ１７からの光束を光出射側に向けて略平行化して反射し、第２反射部２７が第１反射部２５に入射しなかったＬＥＤ１７からの光束を光出射側に向けて略平行化して反射することにより、照度分布を均一にすることができる。また、放射照度が高いために光照射距離を伸ばすことができる。そして、光源となるＬＥＤ１７自体が安価に供給されているため、照明装置全体を低コストで作製することができ、光源の消費電力が白熱電球や蛍光灯等と比較して大幅に低いため、ランニングコストも低減できる。具体的には、第１，第２反射部２５，２７による照度、照射距離向上の有効性は、同一照度下において、ＬＥＤ１７は、消費電力がネオン灯の１／６であり、蛍光灯の１／８である。このことは、照明のエネルギ効率を向上させ、ＣＯ2排出削減等の環境問題に及ぼす影響を削減することに寄与することになる。 As described above, according to the illumination unit 100 and the illumination device 200 including the illumination unit 100 according to the present embodiment, the first reflection unit 25 reflects the light beam from the LED 17 in a substantially parallel manner toward the light emitting side, The illuminance distribution can be made uniform by causing the second reflecting portion 27 to reflect the light flux from the LED 17 that has not entered the first reflecting portion 25 in a substantially parallel manner toward the light emitting side. Further, since the irradiance is high, the light irradiation distance can be extended. Since the LED 17 itself serving as the light source is supplied at a low cost, the entire lighting device can be manufactured at low cost, and the power consumption of the light source is significantly lower than incandescent bulbs and fluorescent lamps. Cost can also be reduced. Specifically, the effectiveness of improving the illuminance and irradiation distance by the first and second reflectors 25 and 27 is that, under the same illuminance, the LED 17 consumes 1/6 that of a neon lamp, / 8. This contributes to improving the energy efficiency of lighting and reducing the influence on environmental problems such as CO 2 emission reduction.

また、ＬＥＤ１７が低電圧駆動のために、ショックハザード等の設置後のトラブルが起こり難く、さらに、紫外線や赤外線を殆ど含まないために、照射対象物を傷めることがない。   Moreover, since the LED 17 is driven at a low voltage, troubles after installation such as a shock hazard are unlikely to occur. Further, since the LED 17 hardly contains ultraviolet rays or infrared rays, the irradiation object is not damaged.

照明ユニット１００は、ＬＥＤ１７の光出射側に第１，第２反射部２５，２７からなる反射鏡を設けているために、ＬＥＤ１７の背面側に設ける場合と比較して、光源ユニットの厚みを薄く構成することができる。これは、ショーケース等の設置スペースの限られた部位へ収納する際に特に有利となる。   Since the illumination unit 100 is provided with the reflecting mirror composed of the first and second reflecting portions 25 and 27 on the light emitting side of the LED 17, the thickness of the light source unit is reduced compared to the case where it is provided on the back side of the LED 17. Can be configured. This is particularly advantageous when storing in a limited area of installation space such as a showcase.

なお、ＬＥＤ１７は、多数個を１ユニットとしたアレイ状として発光部２１を構成したが、所望の輝度が得られればＬＥＤが１個の単体構成であってもよい。また、第１反射部２５の放物面鏡２５ａの反射面は、厳密に放物面でなくともよく、例えば双曲線であってもよい。いずれにせよ、放物面に近似した曲面であれば良く、微細な平面鏡が全体として放物面状に形成したものであってもよい。   In addition, although LED17 comprised the light emission part 21 as the array form which made many units into 1 unit, as long as desired brightness | luminance is obtained, LED may be a single-piece | unit structure. Further, the reflection surface of the parabolic mirror 25a of the first reflection unit 25 may not be strictly a paraboloid, and may be a hyperbola, for example. In any case, it may be a curved surface approximated to a paraboloid, and a fine plane mirror may be formed in a parabolic shape as a whole.

次に、本発明に係る照明ユニットの第１変形例を説明する。
なお、以下の各態様においては、既に説明した部材と同様な構成・作用を有する部材については、同一の符号を付与することでその説明を簡略化する。
本変形例における照明ユニット１２０は、前述の照明ユニット１００の構成と略同様であるが、鏡面反射部材の反射面をなし地状に荒らしている点のみ異なる。 Next, a first modification of the lighting unit according to the present invention will be described.
In the following embodiments, members having the same configurations and functions as those already described are given the same reference numerals to simplify the description.
The illumination unit 120 in the present modification is substantially the same as the configuration of the illumination unit 100 described above, but differs only in that the reflection surface of the specular reflection member is roughened.

図８に反射面をなし地状として構成した照明ユニットによる照度分布を表す説明図を示した。
この構成によれば、図５に示す場合と比較して最大照度が若干低下するが、照度が均一となる範囲Ｗ２が広くなり、一台の照明ユニット１２０によって、より広範囲の照明を行うことが可能となる。 FIG. 8 shows an explanatory diagram showing an illuminance distribution by an illumination unit having a reflection surface and a ground shape.
According to this configuration, the maximum illuminance is slightly reduced as compared with the case shown in FIG. 5, but the range W2 in which the illuminance is uniform is widened, and a wider range of illumination can be performed by one illumination unit 120. It becomes possible.

（第２実施形態）
次に、本発明に係る照明ユニットの第２実施形態について説明する。
本実施形態においては、広範囲の照明を行うための構成としている。
図９に本実施形態に係る照明ユニットと、この照明ユニットによる照度分布を表す説明図である。 (Second Embodiment)
Next, a second embodiment of the lighting unit according to the present invention will be described.
In this embodiment, it is set as the structure for performing illumination of a wide range.
FIG. 9 is an explanatory diagram showing the illumination unit according to the present embodiment and the illuminance distribution by the illumination unit.

本実施形態の照明ユニット３００は、前述の第１実施形態に示した照明ユニット１００を複数個、並列に配置して構成している。各照明ユニット１００の配置間隔は、隣接する照明ユニット１００からの照射光の強度を合わせた全照度分布（図中一点鎖線で示す）が平坦となるように設定される。
この構成によれば、照明ユニット１００を複数アレイ化することで、照度が均一となる範囲を拡大することができ、照明する領域を、照度の低下を生じさせることなく広げることができる。 The lighting unit 300 of the present embodiment is configured by arranging a plurality of the lighting units 100 shown in the first embodiment in parallel. The arrangement interval of each illumination unit 100 is set so that the total illuminance distribution (indicated by the alternate long and short dash line in the figure) that combines the intensities of the irradiation light from adjacent illumination units 100 is flat.
According to this configuration, by arranging a plurality of illumination units 100, the range in which the illuminance is uniform can be expanded, and the illuminated area can be expanded without causing a decrease in illuminance.

（第３実施形態）
次に、本発明に係る照明ユニットの第３実施形態について説明する。
本実施形態においては、照明ユニットを円環状に構成している。
図１０に円環状の照明ユニットの断面図（ａ）、下面図（ｂ）を示した。
本実施形態の照明ユニット４００は、円環状或いは円板状等に形成された配線基板１９上に複数（本実施形態では１２個）のＬＥＤ１７が円周方向に沿って配設されており、第１反射部２５が、各ＬＥＤ１７に対応した数だけそれぞれ個別に配設されている。また、第２反射部２７が第１反射部２５のさらに光出射側に、内周側と外周側との円環状に形成されて第１反射部２５を覆って一体に連続して形成されている。 (Third embodiment)
Next, a third embodiment of the lighting unit according to the present invention will be described.
In this embodiment, the illumination unit is configured in an annular shape.
FIG. 10 shows a sectional view (a) and a bottom view (b) of the annular illumination unit.
In the illumination unit 400 of this embodiment, a plurality of (in this embodiment, 12) LEDs 17 are arranged along the circumferential direction on a wiring board 19 formed in an annular shape or a disk shape. The number of one reflecting portions 25 corresponding to each LED 17 is individually provided. In addition, the second reflecting portion 27 is formed in an annular shape with an inner peripheral side and an outer peripheral side on the light emitting side of the first reflecting portion 25 so as to cover the first reflecting portion 25 and be integrally formed continuously. Yes.

本構成の照明ユニット４００によれば、全体が円環形状に形成されているために、照度が均一となる範囲が円環状に現れ、照明ユニット４００のサイズが小さくても、広い範囲にわたって均一な照度を得ることができる。また、この照明ユニット４００を直径サイズの異なるもの同士を組み合わせることで、同心円状に複数の照明ユニットを配列することもでき、小型でありながら広い範囲にわたって均一な照度が得られる構成にできる。   According to the illumination unit 400 of this configuration, since the whole is formed in an annular shape, a range where the illuminance is uniform appears in an annular shape, and even if the size of the illumination unit 400 is small, it is uniform over a wide range. Illuminance can be obtained. In addition, by combining the illumination units 400 having different diameter sizes, a plurality of illumination units can be arranged concentrically, and a uniform illuminance can be obtained over a wide range while being small.

（他の実施形態）
以上説明した各実施形態に共通の断面構造を有する反射鏡部材は、その構造に限らず、適宜な変更が可能である。
図１１は他の断面構造を有する反射鏡部材の構成例を示す断面図である。
図示するように、本構成においては、光源であるＬＥＤ１７の光路前面に凸面鏡４７を配設し、ＬＥＤ１７からの出射光の殆どが凸面鏡４７に照射される。凸面鏡４７に照射され反射した光は第１反射部２５の放物面鏡２５ａにより平行光化され、或いは第２反射部２７の平面板鏡２７ａにより平行光化される。また、凸面鏡４７に照射されなかった一部の光は第２反射部２７の平面板鏡２７ａにより平行光化される。これにより、ＬＥＤ１７から出射された光は、必ず第１反射部２５又は第２反射部２７による偏向を受けて平行光化され、放射照度が高い状態となって光路前方に向かうことになる。 (Other embodiments)
The reflecting mirror member having the cross-sectional structure common to the embodiments described above is not limited to the structure, and can be appropriately changed.
FIG. 11 is a cross-sectional view showing a configuration example of a reflecting mirror member having another cross-sectional structure.
As shown in the figure, in this configuration, a convex mirror 47 is disposed in front of the optical path of the LED 17 that is a light source, and most of the light emitted from the LED 17 is irradiated onto the convex mirror 47. The light irradiated and reflected on the convex mirror 47 is converted into parallel light by the parabolic mirror 25a of the first reflection unit 25, or converted into parallel light by the plane plate mirror 27a of the second reflection unit 27. Further, part of the light that has not been irradiated onto the convex mirror 47 is converted into parallel light by the flat plate mirror 27 a of the second reflecting portion 27. Thereby, the light emitted from the LED 17 is always converted into parallel light by being deflected by the first reflecting portion 25 or the second reflecting portion 27, and the irradiance is high and goes toward the front of the optical path.

上記例のように、反射鏡部材の構造は適宜変更可能であり、その他にも、次のような変更があってもよい。
ＬＥＤ１７の配列は、一直線上に並ぶ１列であったが、２列や３列以上の多数列であってもよく、千鳥配置や不規則な配置として構成としてもよい。また、第２反射部２７の平面板鏡２７ａは曲面鏡として、所定距離で集光（結像）させる構成としてもよい。また、平面板鏡２７ａのＬＥＤ１７の光軸に対する開き角度θ（図８参照）を変更することで、光の偏向状態を調整することができる。つまり、開き角度θを大きくして照明範囲を広げたり、開き角度θを小さくして特定位置に集光させることが可能となる。その場合には、第１反射部と第２反射部とを一体構成とせずに個別に設け、平面板鏡の開き角度θを調整自在にした構成とすることが好ましい。 As in the above example, the structure of the reflecting mirror member can be changed as appropriate, and there may be other changes as follows.
The arrangement of the LEDs 17 is one line arranged in a straight line, but it may be two or more than three lines, and may be configured in a staggered arrangement or an irregular arrangement. Further, the flat plate mirror 27a of the second reflecting unit 27 may be a curved mirror that collects light (images) at a predetermined distance. Moreover, the deflection state of the light can be adjusted by changing the opening angle θ (see FIG. 8) of the flat plate mirror 27a with respect to the optical axis of the LED 17. In other words, the opening angle θ can be increased to widen the illumination range, or the opening angle θ can be decreased to collect light at a specific position. In that case, it is preferable to provide a configuration in which the first reflecting portion and the second reflecting portion are individually provided without being integrated, and the opening angle θ of the flat plate mirror is adjustable.

また、ＬＥＤ１７の駆動電圧は、１２Ｖや２４Ｖに代えて、６Ｖであってもよい。駆動電圧を６Ｖとすることにより、パソコン等に使用されるＵＳＢ規格の端子に接続することで、ＵＳＢ端子から駆動電圧を直接得ることができる。これにより、例えばバッテリー駆動されるパソコンを暗い環境下で使用する場合に、省電力であるためにバッテリーに多大な負荷をかけずに手元を明るく照明することができる。
また、駆動電圧を１２Ｖとすることにより、太陽電池による発電器の端子（１２Ｖが規格）に照明ユニットの電源ラインを単純に接続することで、照明ユニットが広範囲で利用可能となる。さらに、固定電話通信線の電圧−４８Ｖを駆動電圧としてもよい。この場合には、電話通信線の端子に接続することにより、例えば災害時等の非常用灯としての利用が可能となり、利便性が高まる。 Further, the driving voltage of the LED 17 may be 6V instead of 12V or 24V. By setting the driving voltage to 6 V, the driving voltage can be directly obtained from the USB terminal by connecting to a USB standard terminal used in a personal computer or the like. Thereby, for example, when a personal computer driven by a battery is used in a dark environment, it is possible to illuminate a hand brightly without applying a great load on the battery because of power saving.
Further, by setting the driving voltage to 12V, the lighting unit can be used in a wide range by simply connecting the power supply line of the lighting unit to the terminal (12V is standard) of the generator by the solar cell. Further, the voltage -48V of the fixed telephone communication line may be used as the drive voltage. In this case, by connecting to the terminal of the telephone communication line, it can be used as an emergency light at the time of a disaster, for example, and convenience is enhanced.

本発明に係る第１実施形態の照明装置２００の性状を以下に示す。
・ＬＥＤ数 １６個
・反射鏡部材２３の外形寸法
縦２３．８ｍｍ、横２６４ｍｍ、高さ１６．２５ｍｍ The property of the illuminating device 200 of 1st Embodiment which concerns on this invention is shown below.
-Number of LEDs: 16-External dimensions of the reflector member 23: 23.8 mm long, 264 mm wide, 16.25 mm high

上記構成の照明装置２００によれば、下記の基本特性が実験的に得られる。
・直線照射距離（光源位置から１ ｌｘ以上の照度が得られる位置までの最大距離） ３０ｍ以上
・光点直下照度（光点直下距離２ｍの地点における照度）
４８．５ ｌｘ／ｍ2
・電気的特性
１２Ｖ駆動時（ＡＣ／ＤＣ共通） ０．０９Ａ １．１ｗｈ／１本
２４Ｖ駆動時（ＡＣ／ＤＣ共通） ０．０８Ａ １．９２ｗｈ／１本
・光学的特性
全光束（１２Ｖ駆動時） １８．８ｌｍ
全光束（２４Ｖ駆動時） ４２．８ｌｍ According to the illumination device 200 having the above configuration, the following basic characteristics can be experimentally obtained.
・ Linear irradiation distance (maximum distance from the light source position to the position where illuminance of 1 lx or more can be obtained) 30m or more ・ Illuminance immediately below the light spot (illuminance at a distance of 2m directly below the light spot)
48.5 lx / m 2
・ Electrical characteristics 12V drive (AC / DC common) 0.09A 1.1wh / 1 line 24V drive (AC / DC common) 0.08A 1.92wh / 1 line ・ Optical characteristics Total luminous flux (12V drive) 18.8lm
Total luminous flux (at 24V drive) 42.8lm

ここで、上記構成の照明ユニット１００の効果を確認するため、以下の条件で照度分布の試験を行った。
上記構成の照明ユニットを実施例１―１とし、上記構成の照明ユニットから鏡面反射部材を取り外し、発光部２１だけの構成としたものを比較例１−１とし、上記構成の照明ユニットの鏡面反射部材を第１反射部２５だけの構成としたものを比較例１−２とした。即ち、放物面鏡＋平板状鏡（実施例１−１）、放物面鏡のみ（比較例１−１）、反射鏡なし（比較例１−２）の３モデルとした。 Here, in order to confirm the effect of the illumination unit 100 having the above configuration, an illuminance distribution test was performed under the following conditions.
The illumination unit having the above-described configuration is referred to as Example 1-1, the mirror reflection member is removed from the illumination unit having the above-described configuration, and only the light emitting unit 21 is configured as Comparative Example 1-1. A member having only the first reflecting portion 25 as a member was set as Comparative Example 1-2. That is, it was set as three models of a parabolic mirror + flat mirror (Example 1-1), only a parabolic mirror (Comparative Example 1-1), and no reflecting mirror (Comparative Example 1-2).

照度測定に際しては、暗室内にて３０ｃｍ×３５ｃｍ×高さ４９ｃｍのボックスを用意し、このボックス内に上記３モデルの照明ユニットを載置し、予め設定した各測定位置の照度を照度測定装置（横河インスツルメンツ株式会社製 型名５１０ ０２）により測定した。
図１２に比較例１−１、図１３に比較例１−２、図１４に実施例１−１の照度分布測定結果を示す。
比較例１−１においては、図１２に示すように、ｌ００ｌｘ程度の低い照度の領域が広い角度範囲に亘って形成されて、最大照度も１１５ｌｘ程度であった。
比較例１−２においては、図１３に示すように、３６０〜４００ｌｘの照度を有する光の帯が形成され、その照射範囲も放物面鏡の解放側の幅と略同等の範囲になった。 For illuminance measurement, a box of 30 cm x 35 cm x height 49 cm is prepared in a dark room, the above three model lighting units are placed in this box, and the illuminance measuring device ( Yokogawa Instruments Co., Ltd. model name 51002).
FIG. 12 shows the results of illuminance distribution measurement of Comparative Example 1-1, FIG. 13 of Comparative Example 1-2, and FIG. 14 of Example 1-1.
In Comparative Example 1-1, as shown in FIG. 12, a low illuminance region of about 100 lx was formed over a wide angle range, and the maximum illuminance was about 115 lx.
In Comparative Example 1-2, as shown in FIG. 13, a band of light having an illuminance of 360 to 400 lx was formed, and the irradiation range was also substantially the same as the width of the parabolic mirror on the open side. .

これに対して実施例１−１は、図１４に示すように、９００ｌｘを超える略一定照度を有する強い光の帯が、平板状鏡の幅と略同等の範囲に形成され、この光の帯の外側は２００ｌｘ程度にまで急峻に照度が低下する結果となった。この実施例１−１の強い光の帯は、比較例１−２で現れた境界がはっきりしない光の帯とは明らかに異なり、光の帯の位置が明瞭に識別できるものとなった。   On the other hand, in Example 1-1, as shown in FIG. 14, a strong light band having a substantially constant illuminance exceeding 900 lx is formed in a range substantially equal to the width of the flat mirror. As a result, the illuminance sharply decreased to about 200 lx. The intense light band of Example 1-1 was clearly different from the light band where the boundary appeared in Comparative Example 1-2 was not clear, and the position of the light band could be clearly identified.

次に、本照明装置の消費電力の低減効果について比較した。
ここでは、蛍光灯や電球型蛍光ランプを利用した従来の照明装置を、照度が同等レベルになるように本願発明の照明装置に置き換えた場合について、双方の消費電力の差を比較した。 Next, the effect of reducing the power consumption of the lighting device was compared.
Here, the difference in power consumption between the conventional lighting device using a fluorescent lamp or a bulb-type fluorescent lamp was compared in the case where the lighting device of the present invention was replaced so that the illuminance was equivalent.

Figure 2006156192
Figure 2006156192

比較例２−１は、インバーター式チルドラインの蛍光灯（５６Ｗ×８本）を用いており、消費電力が４４８Ｗである。この比較例２−１の構成と同等レベルの照度を得るため、実施例２−１ではＤＣ２４Ｖ駆動の照明ユニット（ＬＥＤアレイ）と反射板とを組み合わせた第１実施形態同様の構成の照明ユニットを合計７０本用意した。駆動電圧はＤＣ２４Ｖで照明ユニット１本当たりの消費電力は１．９２Ｗであり、７０本分を纏めた消費電力は１３４Ｗとなる。つまり、従前の消費電力４４８Ｗの照明装置を本願発明の照明装置に変更することで、消費電力は０．３０倍の１３４Ｗにまで低減された。   Comparative Example 2-1 uses an inverter-type chilled line fluorescent lamp (56 W × 8) and has a power consumption of 448 W. In order to obtain an illuminance equivalent to that of the configuration of Comparative Example 2-1, in Example 2-1, an illumination unit having the same configuration as that of the first embodiment in which a DC 24V drive illumination unit (LED array) and a reflector are combined. A total of 70 were prepared. The drive voltage is 24V DC, the power consumption per lighting unit is 1.92W, and the power consumption for the 70 lighting units is 134W. That is, the power consumption was reduced to 134 W, which is 0.30 times, by changing the conventional lighting device with power consumption of 448 W to the lighting device of the present invention.

比較例２−２は、遠藤照明製照明器具ＥＧ−９８１８に日立製作所製 蛍光ランプ ＥＦＤ９ＥＬ−Ｅ１７（９Ｗ×６０個）を用いており、消費電力が５４０Ｗである。実施例２−２では、これと同等レベルの照度を得るため、第１実施形態同様の照明ユニットを合計１３２本用意した。駆動電圧はＤＣ２４Ｖで照明ユニット１本当たりの消費電力は１．９２Ｗであり、１３２本分を纏めた消費電力は２５３Ｗとなる。つまり、この場合の消費電力は０．４７倍にまで低減された。   In Comparative Example 2-2, a fluorescent lamp EFD9EL-E17 (9W × 60 pieces) manufactured by Hitachi, Ltd. is used as the lighting fixture EG-9818 made by Endo Lighting, and the power consumption is 540W. In Example 2-2, a total of 132 illumination units similar to those of the first embodiment were prepared in order to obtain the same level of illuminance. The driving voltage is 24V DC, the power consumption per lighting unit is 1.92W, and the power consumption for the 132 lighting units is 253W. That is, the power consumption in this case was reduced to 0.47 times.

比較例２−３は、遠藤照明製照明器具ＥＧ−９８１８に日立製作所製 蛍光ランプ ＥＦＤ９ＥＬ−Ｅ１７（９Ｗ×３６個）を用いており、消費電力が３２４Ｗである。実施例２−３では、これと同等レベルの照度を得るため、第１実施形態同様の照明ユニットを合計８６本用意した。駆動電圧はＤＣ１２Ｖで照明ユニット１本当たりの消費電力は１．１Ｗであり、８６本分を纏めた消費電力は９４．６Ｗとなる。つまり、この場合の消費電力は０．２９倍にまで低減された。   In Comparative Example 2-3, a fluorescent lamp EFD9EL-E17 (9W × 36) manufactured by Hitachi, Ltd. is used for the lighting fixture EG-9818 manufactured by Endo Lighting, and the power consumption is 324W. In Example 2-3, in order to obtain the same level of illuminance, a total of 86 illumination units similar to those of the first embodiment were prepared. The drive voltage is DC12V, the power consumption per lighting unit is 1.1W, and the power consumption for the 86 lighting units is 94.6W. That is, the power consumption in this case was reduced to 0.29 times.

本発明に係る照明装置の第１実施形態を示す全体構成図である。It is a whole block diagram which shows 1st Embodiment of the illuminating device which concerns on this invention. 照明ユニットの側面図（ａ）、下面図（ｂ）である。It is the side view (a) and bottom view (b) of an illumination unit. 照明ユニットの分解斜視図である。It is a disassembled perspective view of an illumination unit. 図２に示す照明ユニットのＡ−Ａ断面図である。It is AA sectional drawing of the illumination unit shown in FIG. 照明ユニットによる照度分布を示すグラフである。It is a graph which shows the illumination intensity distribution by an illumination unit. ＬＥＤの点灯時に反射鏡部材を光出射側から見た状態を示す説明図である。It is explanatory drawing which shows the state which looked at the reflective-mirror member from the light-projection side at the time of lighting of LED. 照明ユニットによる光源の放射輝度と光源からの距離との関係を、反射面の有無やその種類に応じて調べた概念的なグラフである。It is the conceptual graph which investigated the relationship between the radiance of the light source by a lighting unit, and the distance from a light source according to the presence or absence of a reflective surface, and its kind. 反射面をなし地状として構成した照明ユニットによる照度分布を表す説明図である。It is explanatory drawing showing the illuminance distribution by the illumination unit which comprised the reflective surface as a plain shape. 本発明に係る第２実施形態の照明ユニットと、この照明ユニットによる照度分布を表す説明図である。It is explanatory drawing showing the illumination unit of 2nd Embodiment which concerns on this invention, and the illumination intensity distribution by this illumination unit. 本発明に係る第３実施形態の円環状の照明ユニットの構成図で、（ａ）は断面図、（ｂ）は下面図である。It is a block diagram of the annular | circular shaped illumination unit of 3rd Embodiment which concerns on this invention, (a) is sectional drawing, (b) is a bottom view. 他の断面構造を有する反射鏡部材の構成例を示す断面図である。It is sectional drawing which shows the structural example of the reflective mirror member which has another cross-section. 比較例１−１に対する照度分布の測定結果を示す図である。It is a figure which shows the measurement result of the illumination intensity distribution with respect to Comparative Example 1-1. 比較例１−２に対する照度分布の測定結果を示す図である。It is a figure which shows the measurement result of the illumination intensity distribution with respect to Comparative Example 1-2. 実施例１−１に対する照度分布の測定結果を示す図である。It is a figure which shows the measurement result of the illumination intensity distribution with respect to Example 1-1. （ａ），（ｂ）は従来の照明装置の模式図である。(A), (b) is a schematic diagram of the conventional illuminating device.

符号の説明Explanation of symbols

１１ 駆動部
１７ ＬＥＤ（発光ダイオード）
１９ 配線基板（基台）
２１ 発光部
２５ 第１反射部
２７ 第２反射部
４３ 第１反射面(反射面)
４５ 第２反射面（反射面）
１００，１２０，３００，４００ 照明ユニット
２００ 照明装置 11 Drive unit 17 LED (light emitting diode)
19 Wiring board (base)
21 Light Emitting Unit 25 First Reflecting Unit 27 Second Reflecting Unit 43 First Reflecting Surface (Reflecting Surface)
45 Second reflective surface (reflective surface)
100, 120, 300, 400 Lighting unit 200 Lighting device

Claims (4)

発光ダイオードを発光光源とした照明ユニットであって、
複数の発光ダイオードを基台に配設した発光部と、
前記発光部の光出射側に前記複数の発光ダイオードそれぞれに対応して設けられ、前記発光ダイオードからの光を光出射側に向けて略平行化して反射する第１反射部と、
前記第１反射部のさらに光出射側に設けられ、前記第１反射部に入射しなかった前記発光ダイオードからの光を光出射側に向けて略平行化して反射する第２反射部と、
を備えたことを特徴とする照明ユニット。 A lighting unit using a light emitting diode as a light source,
A light emitting unit having a plurality of light emitting diodes arranged on a base;
A first reflecting portion provided on the light emitting side of the light emitting portion corresponding to each of the plurality of light emitting diodes, and reflecting the light from the light emitting diode substantially parallel to the light emitting side;
A second reflecting portion that is provided further on the light emitting side of the first reflecting portion and reflects the light from the light emitting diode that has not entered the first reflecting portion in a substantially parallel manner toward the light emitting side;
A lighting unit comprising: 請求項１記載の照明ユニットであって、
前記第１反射部が、前記発光ダイオードの発光面を焦点位置とする放物面からなる反射面を有することを特徴とする照明ユニット。 The lighting unit according to claim 1,
The lighting unit, wherein the first reflecting portion has a reflecting surface made of a paraboloid having a light emitting surface of the light emitting diode as a focal position. 請求項１又は請求項２記載の照明ユニットであって、
前記第２反射部が、前記発光ダイオードの配列方向に対して平行に配置された平板状の反射面を有することを特徴とする照明ユニット。 The lighting unit according to claim 1 or 2,
The lighting unit, wherein the second reflecting portion has a flat reflecting surface disposed in parallel to the arrangement direction of the light emitting diodes. 請求項１〜請求項３のいずれか１項記載の照明ユニットと、
前記発光ダイオードを発光駆動するための電力を供給する駆動部と、
を備えたことを特徴とする照明装置。 The lighting unit according to any one of claims 1 to 3,
A drive unit for supplying power for driving the light emitting diode to emit light;
An illumination device comprising:
JP2004346543A 2004-11-30 2004-11-30 LIGHTING UNIT AND LIGHTING DEVICE HAVING THE SAME Expired - Fee Related JP3694310B1 (en)

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CNB200580016064XA CN100510518C (en) 2004-11-30 2005-09-13 Illumination unit and illumination apparatus
KR1020067024265A KR100784596B1 (en) 2004-11-30 2005-09-13 Illumination unit and illumination apparatus
EP05783190A EP1818607A4 (en) 2004-11-30 2005-09-13 Illumination unit and illumination apparatus
US11/596,814 US20070230171A1 (en) 2004-11-30 2005-09-13 Illumination Unit and Illumination Apparatus
TW094131419A TWI303701B (en) 2004-11-30 2005-09-13 Illumination unit and illumination apparatus
PCT/JP2005/016848 WO2006059422A1 (en) 2004-11-30 2005-09-13 Illumination unit and illumination apparatus
EP09150191A EP2039991A3 (en) 2004-11-30 2005-09-13 Illumination unit and illumination apparatus
MYPI20055596A MY138360A (en) 2004-11-30 2005-11-30 Illumination unit and illumination apparatus

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