JP6056056B2 - LED lighting device - Google Patents
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本発明は、ＬＥＤを用いた照明装置に関するもので、特にＬＥＤ放射光の反射光を利用した照明装置に関する。 The present invention relates to an illuminating device using LEDs, and more particularly to an illuminating device using reflected light of LED radiation.
最近のエネルギー問題の高まりの中で省エネルギーかつ長寿命であるＬＥＤ照明が注目されている。ＬＥＤ照明に用いられているものは、基板に発光体であるＬＥＤおよびそれを制御するＩＣを搭載し、ＬＥＤからの放射光を直接照射するＬＥＤ電球が大半である。ＬＥＤは点光源であり、ＬＥＤの放射光は指向性があり直進性が大きいため、放射光の進行方向から外れると暗くなるという問題がある。そこで、光拡散板を用いて光を拡散（分散）させ防眩効果を持たせたものが使用されている。たとえば、光拡散板としてアクリル等のプラスチック板の使用、サンドブラストなどにより表面を荒くしたガラスの使用、さらには、ガラス板に低融点ガラス粉および無機質フィラーを含むペーストをコートし、加熱処理し散光性膜を形成した防眩ガラスも提案されている。（特許文献１、特許文献２） With the recent increase in energy problems, LED lighting that is energy-saving and has a long life is attracting attention. Most of LED bulbs that are used for LED lighting include an LED that is a light emitter and an IC that controls the LED mounted on a substrate, and directly emits light emitted from the LED. The LED is a point light source, and the emitted light from the LED is directional and has a high straightness, so that there is a problem that the LED becomes dark when the emitted light deviates from the traveling direction. Therefore, a light diffusing plate that diffuses (disperses) light and has an antiglare effect is used. For example, use of a plastic plate such as acrylic as a light diffusing plate, use of glass whose surface has been roughened by sandblasting, etc., and further coat the glass plate with paste containing low melting glass powder and inorganic filler, heat treatment, and diffuse An antiglare glass having a film formed thereon has also been proposed. (Patent Document 1, Patent Document 2)
しかし、光拡散板として用いられるアクリル等は透過率が低いという問題がある。また、サンドブラストなどにより表面を荒くしたガラスは強度が低下することが懸念されている。一方、散光性膜を形成した防眩ガラスは無機質フィラーを添加しているため透過率が低下し、ヘイズ値も不十分である。またＬＥＤ放射光の反射光を用いた照明装置の開示は少なく、実際の利用も少ないので、技術的要素が提供されていない。 However, acrylic or the like used as a light diffusing plate has a problem of low transmittance. Further, there is a concern that the strength of the glass whose surface is roughened by sandblasting or the like is lowered. On the other hand, the antiglare glass having a light-diffusing film has an inorganic filler added, so that the transmittance is lowered and the haze value is insufficient. Moreover, since there are few disclosures of the illuminating device using the reflected light of LED radiation light, and there are few actual utilization, a technical element is not provided.
本発明は、上記事情に鑑みてなされたものであり、ＬＥＤからの放射光を直接使用せず、その反射光を利用する照明方法を提案するものであり、本発明の主要な構成要件は以下の通りである。
（１）本発明は、縦方向、または縦方向かつ横方向に配置された複数のＬＥＤを含むＬＥＤ配列灯、前記ＬＥＤから放射される直進光を反射させる第１の反射鏡、および前記第１の反射鏡で反射された第１の反射光の一部または全部を反射させる第２の反射鏡を有するＬＥＤ照明装置であって、
第２の反射鏡で反射された第２の反射光は前記ＬＥＤ配列灯の上部後方から前記ＬＥＤ照明装置の外側へ照射されることを特徴とするＬＥＤ照明装置であり、特に第２の反射光は、前記ＬＥＤからの直進光と逆方向に進行することを特徴とする。
The present invention has been made in view of the above circumstances, and proposes an illumination method that uses reflected light without directly using the emitted light from the LED. The main components of the present invention are as follows. It is as follows.
(1) The present invention relates to an LED array lamp including a plurality of LEDs arranged in the vertical direction or in the vertical and horizontal directions, a first reflecting mirror that reflects straight light emitted from the LEDs, and the first An LED lighting device having a second reflecting mirror that reflects part or all of the first reflected light reflected by the reflecting mirror of
The second reflected light reflected by the second reflecting mirror is irradiated to the outside of the LED lighting device from the upper rear of the LED array lamp, and particularly the second reflected light. Travels in the opposite direction to the straight light from the LED.
（２）本発明は、上記に加えて、縦方向に配列されたｎ個のＬＥＤ列において、最下部のＬＥＤ（Ｌ１）から放射された直進光が第１の反射鏡に入射する入射角をα１、最下部のＬＥＤ（Ｌ１）から数えてｉ番目のＬＥＤ（Ｌｉ）から放射されたＬＥＤ直進光が第１の反射鏡に入射する入射角をαｉ、最上部のＬＥＤ（ｉ＝ｎ）から放射されたＬＥＤ直進光が第１の反射鏡に入射する入射角をαｎとしたとき、第１の反射鏡はα１＜・・・＜αｉ−１＜αｉ＜αｉ＋１＜・・・＜αｎを満足する曲面であり、かつなめらかで連続した（微分可能）曲面であるか、あるいは、第１の反射鏡は平面鏡であり、縦方向に配列されたｎ個のＬＥＤ列におけるＬＥＤ（Ｌｉ）（ｉ＝１、・・・、ｉ、・・・、ｎ）から放射されたＬＥＤ直進光が入射する入射角αｉはαｉ＝α（一定）であることを特徴とする。 (2) In addition to the above, in the present invention, in the n LED rows arranged in the vertical direction, the incident angle at which the straight light emitted from the lowermost LED (L1) enters the first reflecting mirror is set. α1, the incident angle at which the straight LED light emitted from the i-th LED (Li) counted from the lowermost LED (L1) is incident on the first reflecting mirror is αi, and the uppermost LED (i = n) When the incident angle at which the emitted straight LED light enters the first reflecting mirror is αn, the first reflecting mirror satisfies α1 <... <Αi-1 <αi <αi + 1 <. Or a smooth and continuous (differentiable) curved surface, or the first reflecting mirror is a plane mirror, and LEDs (Li) (i = i = n) in n LED rows arranged in the vertical direction. 1,..., I,. αi is characterized in that αi = α (constant).
（３）本発明は、上記に加えて、縦方向に配列されたｎ個のＬＥＤ列において、最下部のＬＥＤ（Ｌ１）から放射されたＬＥＤ直進光の第１反射光が第２の反射鏡に入射する入射角をβ１、最下部のＬＥＤ（Ｌ１）から数えてｉ番目のＬＥＤ（Ｌｉ）から放射されたＬＥＤ直進光の第１の反射光が第２の反射鏡に入射する入射角をβｉ、最上部のＬＥＤ（ｉ＝ｎ）から放射されたＬＥＤ直進光の第１の反射光が第２の反射鏡に入射する入射角をβｎとしたとき、第２の反射鏡はβ１＞・・・＞βｉ−１＜βｉ＜βｉ＋１＜・・・＜βｎを満足する曲面であり、かつなめらかで連続した（微分可能）曲面であるか、あるいは、第２の反射鏡は平面鏡であり、縦方向に配列されたｎ個のＬＥＤ列におけるＬＥＤ（Ｌｉ）（ｉ＝１、・・・、ｉ、・・・、ｎ）から放射されたＬＥＤ直進光の第１の反射光が第２の反射鏡に入射する入射角βｉはβｉ＝β（一定）であることを特徴とする。 (3) In addition to the above, in the present invention, in the n LED rows arranged in the vertical direction, the first reflected light of the LED straight light emitted from the lowermost LED (L1) is the second reflecting mirror. The incident angle at which the first reflected light of the straight LED light emitted from the i-th LED (Li) counted from the lowermost LED (L1) is incident on the second reflecting mirror is β1. βi, where βn is an incident angle at which the first reflected light of the straight LED light emitted from the uppermost LED (i = n) is incident on the second reflecting mirror, β1> · ..> βi-1 <βi <βi + 1 <... <Βn, and is a smooth and continuous (differentiable) curved surface, or the second reflecting mirror is a plane mirror, LEDs (Li) (n = 1,..., I,...) In n LED rows arranged in the direction. The incident angle βi at which the first reflected light of the straight LED light emitted from n) enters the second reflecting mirror is βi = β (constant).
（４）本発明は、上記に加えて、８０度＜αｉ＋βｉ＜９０度、好適には８５度＜αｉ＋βｉ＜９５度、最適にはαｉ＋βｉ＝９０度であることを特徴とする。
（５）本発明は、上記に加えて、第２の反射鏡は透明ガラスまたは透明プラスチックであり、さらに第２の反射鏡に入射した第１の反射光は全反射することを特徴とする。
(4) In addition to the above, the present invention is characterized in that 80 degrees <αi + βi <90 degrees, preferably 85 degrees <αi + βi <95 degrees, and most preferably αi + βi = 90 degrees.
(5) In addition to the above, the present invention is characterized in that the second reflecting mirror is made of transparent glass or transparent plastic, and the first reflected light incident on the second reflecting mirror is totally reflected.
本発明の照明装置はＬＥＤ放射光の反射光を照明用として使用する。本発明によって、所望のＬＥＤ放射光の反射光を照明として利用できる。用途に合わせて装置の大きさや形状を設計できるので実用性が高い。ＬＥＤ放射光は第１の反射鏡および第２の反射鏡によって適度に分散されるので、従来のＬＥＤ電球の問題点であった周辺が暗いという問題を解消することができる。拡散板やコーティング材を透過した光は使用しないので、透過率の低下やヘイズ等の問題も発生しない。また、ＬＥＤの向きと逆方向に光を放射することが可能である。ＬＥＤ光源は反射鏡に虚像として写され、外部から視認も容易にできるので、フィラメント型電球と比較しても違和感が小さい。複数のＬＥＤを配列したＬＥＤ配列灯からの光線を平行に並べて取りだすこともできるので、所定の照明を得ることができる。 The illumination device of the present invention uses the reflected light of LED radiation for illumination. According to the present invention, the reflected light of the desired LED radiation can be used as illumination. Since the size and shape of the device can be designed according to the application, it is highly practical. Since the LED radiation is moderately dispersed by the first reflecting mirror and the second reflecting mirror, it is possible to solve the problem that the periphery of the conventional LED bulb, which is a problem, is dark. Since the light transmitted through the diffusion plate and the coating material is not used, problems such as a decrease in transmittance and haze do not occur. It is also possible to emit light in the direction opposite to the direction of the LED. The LED light source is copied as a virtual image on the reflecting mirror and can be easily viewed from the outside. Since the light from the LED array lamp in which a plurality of LEDs are arrayed can also be taken out in parallel, predetermined illumination can be obtained.
本発明は、指向性が強く直進性があるＬＥＤ放射光を反射鏡にて反射させて、適度に分散させながらＬＥＤ光源も視認できるとともに周囲も明るく照らせる照明装置を提供するものである。 The present invention provides an illuminating device in which LED radiation light having high directivity and straightness is reflected by a reflecting mirror so that the LED light source can be visually recognized while being appropriately dispersed, and the surroundings can be illuminated brightly.
図１は、本発明のＬＥＤ照明装置における第１の実施形態を示す図である。本発明のＬＥＤ照明装置１１は、ＬＥＤ配列灯１３、第１の反射鏡（平面反射鏡）１５、および第２の反射鏡（平面反射鏡）１７を含む。図１において、複数（ｎ個）のＬＥＤ（Ｌ１、・・・、Ｌｉ、・・・、Ｌｎ）を一方向（表現上および照明装置をセットするときに基本的には縦置きにするので、以下「縦方向」と称する）に配列したＬＥＤ配列灯１３があり、このＬＥＤ配列灯１３の複数（ｎ個）のＬＥＤからの光線（直進性がある）が一方向（縦方向に垂直方向、表現上、横方向と称する）に放射されている。すなわち各ＬＥＤからの直進光は横方向に進む平行光線である。 FIG. 1 is a diagram showing a first embodiment of the LED lighting device of the present invention. The LED illumination device 11 of the present invention includes an LED array lamp 13, a first reflecting mirror (planar reflecting mirror) 15, and a second reflecting mirror (planar reflecting mirror) 17. In FIG. 1, a plurality (n) of LEDs (L1,..., Li,..., Ln) are arranged in one direction (in terms of expression and basically when setting a lighting device, LED array lamps 13 arranged in the following “vertical direction”), and light rays (with straightness) from a plurality (n) of LEDs of this LED array lamp 13 are unidirectional (perpendicular to the vertical direction), (Referred to as a lateral direction for the sake of expression). That is, the straight light from each LED is a parallel light beam traveling in the lateral direction.
これらのＬＥＤから放射された直進光が入射し反射する第１の反射鏡１５が、ＬＥＤ配列灯１３の直進光の方向（横方向）において、直進光に対して入射角度αを有して配置されている。図１に示す第１の反射鏡１５は平面反射鏡であるから、各ＬＥＤからの直進光に対して反射角も一定であり、αである。すなわち各第１の反射光は平行光線である。 The first reflecting mirror 15 on which the straight light emitted from these LEDs is incident and reflected is arranged with an incident angle α with respect to the straight light in the direction (lateral direction) of the straight light of the LED array lamp 13. Has been. Since the first reflecting mirror 15 shown in FIG. 1 is a plane reflecting mirror, the angle of reflection with respect to straight light from each LED is also constant and is α. That is, each first reflected light is a parallel light beam.
ＬＥＤ配列灯１３の直進光が第１の反射鏡（平面鏡）１５で反射した反射光（第１の反射光）は、次に第２の反射鏡１７に入射し、反射光（第２の反射光）として反射されて、その後第２の反射光はＬＥＤ照明装置外へ出ていく。第1の反射光と第２の反射鏡１７とのなす入射角度をβとすると、第２の反射鏡１７は平面（反射）鏡であるから、各第１の反射光の第２の反射鏡１７からの第２の反射光の反射角も一定であり、βである。すなわち、各第２の反射光は平行光線となる。第１の反射鏡１５と第２の反射鏡１７のなす角度をγとすると、α＋β＝γである。 The reflected light (first reflected light) obtained by the straight light from the LED array lamp 13 reflected by the first reflecting mirror (planar mirror) 15 is then incident on the second reflecting mirror 17 and reflected light (second reflected light). The second reflected light then goes out of the LED lighting device. If the incident angle formed by the first reflected light and the second reflecting mirror 17 is β, the second reflecting mirror 17 is a plane (reflecting) mirror, and therefore the second reflecting mirror for each first reflected light. The reflection angle of the second reflected light from 17 is also constant and β. That is, each 2nd reflected light turns into a parallel ray. If the angle formed by the first reflecting mirror 15 and the second reflecting mirror 17 is γ, α + β = γ.
たとえば、ＬＥＤ配列灯１３の最下部（縦方向に配置されたＬＥＤ配列灯１３における各ＬＥＤのうちで、第１の反射鏡１５に距離が最も近いＬＥＤ）におけるＬＥＤ（Ｌ１）から放射された直進光Ｐ１は、第１の反射鏡１５に入射しかつ反射し、（入射角＝反射角＝α）第１の反射光Ｐ1−1となる。第１の反射光Ｐ1−1は第２の反射鏡１７に入射しかつ反射し、（入射角＝反射角＝β）第２の反射光Ｐ１−2となる。 For example, the straight line radiated from the LED (L1) at the lowermost part of the LED array lamp 13 (the LED having the closest distance to the first reflecting mirror 15 among the LEDs in the LED array lamp 13 arranged in the vertical direction) The light P1 enters the first reflecting mirror 15 and is reflected (incident angle = reflection angle = α) to become the first reflected light P1-1. The first reflected light P1-1 is incident on and reflected by the second reflecting mirror 17 (incident angle = reflecting angle = β) to become the second reflected light P1-2.
また、ＬＥＤ配列灯１３の最上部（縦方向に配置されたＬＥＤ配列灯１３における各ＬＥＤのうちで、第１の反射鏡１５から距離が最も遠いＬＥＤ）におけるＬＥＤ（Ｌn）から放射された直進光Ｐnは、第１の反射鏡１５に入射しかつ反射し、（入射角＝反射角＝α）第１の反射光Ｐn−1となる。第１の反射光Ｐn−1は第２の反射鏡１７に入射しかつ反射し、（入射角＝反射角＝β）第２の反射光Ｐn−2となる。 Moreover, the straight line radiated | emitted from LED (Ln) in the uppermost part (LED in the LED array lamp 13 arrange | positioned in the vertical direction is the furthest distance from the 1st reflective mirror 15) of the LED array lamp 13 The light Pn is incident on and reflected by the first reflecting mirror 15 (incident angle = reflection angle = α), and becomes the first reflected light Pn−1. The first reflected light Pn−1 is incident on and reflected from the second reflecting mirror 17 (incident angle = reflecting angle = β) to become the second reflected light Pn−2.
ＬＥＤ配列灯１３のＬ1とＬnとの間に配置されている各ＬＥＤのＬi（ｉ＝2〜n-1、この順に並んでいる）からの直進光Ｐi、第１の反射光Ｐi−1、第２の反射光Ｐi−2も同様の関係となる。（Ｐi、Ｐi−1、Ｐi−2は図示せず）また、直進光Ｐ１、・・・、Ｐｉ、・・・、Ｐｎは平行であり、第１の反射光Ｐ1−1、・・・、Ｐｉ−１、・・・、Ｐｎ−１は平行であり、第２の反射光Ｐ1−2、・・・、Ｐｉ−2、・・・、Ｐｎ−2は平行である。また、直進光Ｐ１、・・・、Ｐｉ、・・・、Ｐｎおよび第１の反射光Ｐ1−1、・・・、Ｐｉ−１、・・・、Ｐｎ−１はＬＥＤ照明装置１１内に存在するが、第２の反射光Ｐ1−2、・・・、Ｐｉ−2、・・・、Ｐｎ−2はＬＥＤ照明装置１１外に放射され、外部の物体や空間を照射するとともに、外部からＬＥＤの存在を視認できる。また図１から分かるように、ＬＥＤ配列灯１３は外部から確認すると、Ｒ１の方向とは異なり、逆方向側Ｒ２となる。また、その大きさも異なっている。（Ｒ１≠Ｒ２） A straight light Pi from the Li (i = 2 to n-1, arranged in this order) of each LED arranged between L1 and Ln of the LED array lamp 13, a first reflected light Pi-1, The second reflected light Pi-2 has the same relationship. (Pi, Pi-1, Pi-2 are not shown) Further, the straight light P1,..., Pi,..., Pn are parallel, and the first reflected light P1-1,. Pi-1,..., Pn-1 are parallel, and the second reflected lights P1-2, ..., Pi-2, ..., Pn-2 are parallel. Further, the straight light P1, ..., Pi, ..., Pn and the first reflected light P1-1, ..., Pi-1, ..., Pn-1 exist in the LED illumination device 11. However, the second reflected light P1-2,..., Pi-2,..., Pn-2 is radiated to the outside of the LED illumination device 11 to irradiate an external object or space, and the LED from the outside. Can be visually recognized. Further, as can be seen from FIG. 1, when the LED array lamp 13 is confirmed from the outside, it is on the reverse direction side R2 unlike the direction of R1. Moreover, the size is also different. (R1 ≠ R2)
図１は、第１の反射鏡（平面鏡）１５と第２の反射鏡（平面鏡）１７のなす角度γは９０度として描写している。このとき、第２の反射光Ｐｉ−2（ｉ＝１〜ｎ）は直進光Ｐｉ（ｉ＝１〜ｎ）と逆向きで平行な光線となる。すなわち、第２の反射光Ｐｉ−2（ｉ＝１〜ｎ）の向きは、直進光Ｐｉ（ｉ＝１〜ｎ）の向きに対して、１８０度となる。ＬＥＤ配列灯１３の向きから見れば、第２の反射光Ｐｉ−2（ｉ＝１〜ｎ）の向きは横方向であり、ＬＥＤ配列灯１３の上側後方に放射される。すなわち、ＬＥＤ配列灯１３、第１反射鏡（平面鏡）、および１５と第２の反射鏡（平面鏡）１７によって、ＬＥＤ放射光は平行な反射光線となって、その上側後方にあるＬＥＤ照明装置１１の外側にある物体や空間を照らすことができる。 In FIG. 1, the angle γ formed by the first reflecting mirror (plane mirror) 15 and the second reflecting mirror (plane mirror) 17 is depicted as 90 degrees. At this time, the second reflected light Pi-2 (i = 1 to n) is a light beam in the opposite direction and parallel to the straight light Pi (i = 1 to n). That is, the direction of the second reflected light Pi-2 (i = 1 to n) is 180 degrees with respect to the direction of the straight light Pi (i = 1 to n). When viewed from the direction of the LED array lamp 13, the direction of the second reflected light Pi-2 (i = 1 to n) is the lateral direction, and is emitted to the upper rear side of the LED array lamp 13. That is, the LED array light 13, the first reflecting mirror (planar mirror), and the 15 and second reflecting mirror (planar mirror) 17 make the LED radiation light into a parallel reflected light beam, and the LED illumination device 11 on the upper rear side thereof. You can illuminate objects and spaces outside.
尚、ＬＥＤも厳密に言えば完全な点（あるいは線）光源ではなくある程度の幅があり、その放射方向も同じ方向ではなくある程度広がって放射される。さらに複数のＬＥＤを基板等に配置してＬＥＤ配列灯を作製する際の実装方法によるＬＥＤの配置バラツキによる反射光の広がりバラツキもある。また直進性があると言っても距離が長くなるに従い徐々に散乱され広がっていく。また第１の反射鏡や第２の反射鏡の反射面自体の実際の入射角度や反射角度がバラツク場合も考慮する必要がある。さらにはＬＥＤにキャップを被せる場合もあるので、ＬＥＤ光が分散される。従ってＬＥＤ光を一定の方向に取りだす場合には一定の幅を考慮する必要がある。そこで、ＬＥＤの放射光の第２の反射光をある方向に取りだす場合にも、第１の反射鏡および第２の反射鏡のなす角度γの範囲を一定範囲内で許容する必要がある。たとえば、ＬＥＤ光を完全な後方（ＬＥＤの直進光に対して１８０度方向）に対する一定の幅を持った方向へ照射する（取りだす場合）には、好適には、８０度＜γ＝α＋β＜１００度、もっと好適には８５度＜γ＝α＋β＜９５度、最適にはγ＝α＋β＝９０度とするように第１の反射鏡１５および第２の反射鏡１７をＬＥＤ配列灯１３に対して配置すると良い。 Strictly speaking, the LED is not a perfect point (or line) light source but has a certain width, and the radiation direction is not the same direction but is spread to some extent. Furthermore, there is also a spread variation in reflected light due to a variation in LED arrangement due to a mounting method when a plurality of LEDs are arranged on a substrate or the like to produce an LED array lamp. Moreover, even if it says that there is a straight line, it gradually scatters and spreads as the distance increases. It is also necessary to consider the case where the actual incident angle and reflection angle of the reflecting surfaces of the first reflecting mirror and the second reflecting mirror vary. Furthermore, since the LED may be covered with a cap, the LED light is dispersed. Therefore, when LED light is taken out in a certain direction, it is necessary to consider a certain width. Therefore, even when the second reflected light of the emitted light of the LED is extracted in a certain direction, it is necessary to allow the range of the angle γ formed by the first reflecting mirror and the second reflecting mirror within a certain range. For example, in order to irradiate the LED light in a direction having a certain width with respect to the complete rear direction (180 degree direction with respect to the straight light of the LED) (when taking out), preferably, 80 degrees <γ = α + β <100 Degrees, more preferably 85 degrees <γ = α + β <95 degrees, and most preferably, γ = α + β = 90 degrees with respect to the LED array lamp 13 with respect to the LED array lamp 13. It is good to arrange.
図２は、第１の反射鏡（平面鏡）１５と第２の反射鏡（平面鏡）１７のなす角度γが９０度より小さい場合を示す。α＋β＝γであるから、α＋β＝γ＜９０度である。図２に示すように、第２の反射光Ｐｉ−2（ｉ＝１〜ｎ）は直進光Ｐｉ（ｉ＝１〜ｎ）と逆向きであるが、平行光線よりも下向きになる。ＬＥＤ配列灯１３の向きから見れば、第２の反射光Ｐｉ−2（ｉ＝１〜ｎ）の向きは横方向よりも下方であり、互いに平行な光線となってＬＥＤ配列灯１３の後方に放射される。図２から分かるように、ＬＥＤ（Ｌｎ）から出た直進光の第２の反射光Ｐｎ−２はＬＥＤ配列灯１３の上部に当たり、外部へ放射されない場合があるので、全部のＬＥＤの光を外部へ照射したい場合は、ＬＥＤからの直進光Ｐｉからの第１の入射角α、ＬＥＤ配列灯１３と第１の反射鏡１５、第１の反射鏡１５および第２の反射鏡１７の大きさを調節する必要がある。 FIG. 2 shows a case where the angle γ formed by the first reflecting mirror (plane mirror) 15 and the second reflecting mirror (plane mirror) 17 is smaller than 90 degrees. Since α + β = γ, α + β = γ <90 degrees. As shown in FIG. 2, the second reflected light Pi-2 (i = 1 to n) is opposite to the straight light Pi (i = 1 to n), but is lower than the parallel rays. When viewed from the direction of the LED array lamp 13, the direction of the second reflected light Pi-2 (i = 1 to n) is lower than the lateral direction and becomes a parallel light beam behind the LED array lamp 13. Radiated. As can be seen from FIG. 2, the second reflected light Pn-2 of the straight light emitted from the LED (Ln) hits the upper part of the LED array lamp 13 and may not be emitted to the outside. 1, the first incident angle α from the straight light Pi from the LED, the size of the LED array lamp 13 and the first reflecting mirror 15, the first reflecting mirror 15 and the second reflecting mirror 17. It needs to be adjusted.
図３は、第１の反射鏡（平面鏡）１５と第２の反射鏡（平面鏡）１７のなす角度γが９０度より大きい場合を示す。（ただし、γ＜１８０度である。）α＋β＝γであるから、α＋β＝γ＞９０度である。第２の反射光Ｐｉ−2（ｉ＝１〜ｎ）は直進光Ｐｉ（ｉ＝１〜ｎ）と逆向きであるが、横方向光線よりも上向きになる。ＬＥＤ配列灯１３の向きから見れば、第２の反射光Ｐｉ−2（ｉ＝１〜ｎ）の向きは横方向よりも上方であり、ＬＥＤ配列灯１３の後方に放射される。図１〜図３から分かるように、平面反射鏡を２枚組み合わせることによって、ＬＥＤからの直進光をＬＥＤの後方へ放射し、互いに平行な光線となってＬＥＤの後方にある物体や空間を照射することができる。さらに、２枚の平面反射鏡の角度γを調節することによって、ＬＥＤ配列灯よりも後方下方側、あるいは１８０度（完全後方）方向、あるいは後方上方側を照射するＬＥＤ照明装置を作製できる。これらの向きは用途（たとえば、照射する方向を選択するとき）によって適宜選択することができる。 FIG. 3 shows a case where the angle γ formed by the first reflecting mirror (plane mirror) 15 and the second reflecting mirror (plane mirror) 17 is greater than 90 degrees. (However, γ <180 degrees.) Since α + β = γ, α + β = γ> 90 degrees. The second reflected light Pi-2 (i = 1 to n) is in the opposite direction to the straight light Pi (i = 1 to n), but is more upward than the lateral light beam. When viewed from the direction of the LED array lamp 13, the direction of the second reflected light Pi-2 (i = 1 to n) is higher than the lateral direction, and is emitted to the rear of the LED array lamp 13. As can be seen from FIG. 1 to FIG. 3, by combining two plane reflecting mirrors, straight light from the LED is radiated to the rear of the LED, and the parallel light beams irradiate an object or space behind the LED. can do. Further, by adjusting the angle γ of the two plane reflecting mirrors, an LED illumination device that irradiates the rear lower side, the 180 degree (complete rear) direction, or the rear upper side of the LED array lamp can be manufactured. These directions can be appropriately selected depending on the application (for example, when selecting the irradiation direction).
図４は、反射鏡が曲面である本発明の別の実施形態を示す図である。図４に示す本発明の照明装置２１は、ＬＥＤ配列灯２３、第１の曲面反射鏡２５、および第２の曲面反射鏡２７を有する。ＬＥＤ配列灯２３のうちの最下部のＬＥＤのＬ１から放射された直進光Ｐ１は第１の曲面反射鏡２５に入射すると、入射点Ｄ１において反射して第１の反射光Ｐ1−1となる。入射点Ｄ１における第１の曲面反射鏡２５の接平面をＧ１とすると、入射点Ｄ１において接平面Ｇ１の法線と直進光Ｐ１とのなす角度が入射角で、これをα１とすると、反射角α１で反射光Ｐ1−1が進んでいく。第１の反射光Ｐ1−1は次に第２の曲面反射鏡２７の入射点Ｅ１において反射して第２の反射光Ｐ1−２となる。入射点Ｅ１における第２の曲面反射鏡２７の接平面をＨ１とすると、入射点Ｅ１において接平面Ｈ１と第１の反射光Ｐ1−1の法線とのなす角度が入射角で、これをβ１とすると、反射角β１で反射光Ｐ1−2が進んでいき、ＬＥＤ照明装置２１の外側へ放射されて、ＬＥＤ照明装置２１の外側の物体や空間を照射する。 FIG. 4 is a diagram showing another embodiment of the present invention in which the reflecting mirror is a curved surface. The illuminating device 21 of the present invention shown in FIG. 4 has an LED array lamp 23, a first curved reflector 25, and a second curved reflector 27. When the straight light P1 radiated from the lowermost LED L1 of the LED array lamps 23 is incident on the first curved reflecting mirror 25, it is reflected at the incident point D1 and becomes the first reflected light P1-1. If the tangent plane of the first curved reflecting mirror 25 at the incident point D1 is G1, the angle formed between the normal of the tangential plane G1 and the straight light P1 at the incident point D1 is the incident angle, and this is α1, the reflection angle. The reflected light P1-1 advances at α1. The first reflected light P1-1 is then reflected at the incident point E1 of the second curved reflecting mirror 27 to become the second reflected light P1-2. Assuming that the tangent plane of the second curved reflecting mirror 27 at the incident point E1 is H1, the angle formed by the tangential plane H1 and the normal line of the first reflected light P1-1 at the incident point E1 is the incident angle, which is β1. Then, the reflected light P1-2 proceeds at the reflection angle β1, and is emitted to the outside of the LED illumination device 21 to irradiate an object or space outside the LED illumination device 21.
ＬＥＤ配列灯２３のうちの最上部のＬＥＤのＬnから放射された直進光Ｐnは第１の曲面反射鏡２５に入射すると、入射点Ｄnにおいて反射して第１の反射光Ｐn−1となる。入射点Ｄnにおける第１の曲面反射鏡２５の接平面をＧnとすると、入射点Ｄnにおいて接平面Ｇnの法線と直進光Ｐnとのなす角度が入射角で、これをαnとすると、反射角αnで第１の反射光Ｐn−1が進んでいく。第１の反射光Ｐn−1は次に第２の曲面反射鏡２７の入射点Ｅnにおいて反射して第２の反射光Ｐn−２となる。入射点Ｅnにおける第２の曲面反射鏡２７の接平面をＨnとすると、入射点Ｅnにおいて接平面Ｈnの法線と第１の反射光Ｐn−1とのなす角度が入射角で、これをβnとすると、反射角βnで反射光Ｐn−2が進んでいき、ＬＥＤ照明装置２１の外側へ放射されて、ＬＥＤ照明装置２１の外側の物体や空間を照射する。 When the straight light Pn radiated from Ln of the uppermost LED in the LED array lamp 23 is incident on the first curved reflecting mirror 25, it is reflected at the incident point Dn and becomes the first reflected light Pn-1. If the tangent plane of the first curved reflecting mirror 25 at the incident point Dn is Gn, the angle between the normal of the tangential plane Gn and the straight light Pn at the incident point Dn is the incident angle, and αn is the reflection angle. The first reflected light Pn-1 advances at αn. The first reflected light Pn−1 is then reflected at the incident point En of the second curved reflecting mirror 27 to become the second reflected light Pn-2. Assuming that the tangent plane of the second curved reflecting mirror 27 at the incident point En is Hn, the angle formed between the normal line of the tangential plane Hn and the first reflected light Pn−1 at the incident point En is the incident angle, which is βn. Then, the reflected light Pn-2 travels at the reflection angle βn and is emitted to the outside of the LED illumination device 21 to irradiate an object or space outside the LED illumination device 21.
ＬＥＤ配列灯２３のうちの最上部のＬＥＤのＬnと最下部のＬＥＤのＬ1との間におけるＬＥＤのＬiから放射された直進光Ｐiは第１の曲面反射鏡２５に入射すると、入射点Ｄiにおいて反射して第１の反射光Ｐi−1となる。入射点Ｄiにおける第１の曲面反射鏡２５の接平面をＧiとすると、入射点Ｄiにおいて接平面Ｇiの法線と直進光Ｐiとのなす角度が入射角で、これをαiとすると、反射角αiで第１の反射光Ｐi−1が進んでいく。第１の反射光Ｐi−1は次に第２の曲面反射鏡２７の入射点Ｅiにおいて反射して第２の反射光Ｐi−２となる。入射点Ｅnにおける第２の曲面反射鏡２７の接平面をＨiとすると、入射点Ｅiにおいて接平面Ｈiの法線と第１の反射光Ｐi−1とのなす角度が入射角で、これをβiとすると、反射角βiで反射光Ｐi−2が進んでいき、ＬＥＤ照明装置２１の外側へ放射されて、ＬＥＤ照明装置２１の外側の物体や空間を照射する。 When the straight light Pi radiated from the Li of the LED between the Ln of the uppermost LED and the L1 of the lowermost LED of the LED array lamps 23 is incident on the first curved reflecting mirror 25, at the incident point Di. Reflected to become the first reflected light Pi-1. If the tangent plane of the first curved reflecting mirror 25 at the incident point Di is Gi, the angle between the normal of the tangential plane Gi and the straight light Pi at the incident point Di is the incident angle, and αi is the reflection angle. The first reflected light Pi-1 advances at αi. Next, the first reflected light Pi-1 is reflected at the incident point Ei of the second curved reflecting mirror 27 to become the second reflected light Pi-2. Assuming that the tangent plane of the second curved reflecting mirror 27 at the incident point En is Hi, the angle between the normal line of the tangential plane Hi and the first reflected light Pi-1 at the incident point Ei is the incident angle, which is βi. Then, the reflected light Pi-2 travels at the reflection angle βi and is emitted to the outside of the LED illumination device 21 to irradiate an object or space outside the LED illumination device 21.
接平面Ｇｉと接平面Ｈｉとのなす角度をγiとするとαi＋βi＝γiとなる。図１〜図３において説明した様に、０＜γｉ＜９０度のとき、第２の反射光Ｐｉ−2（ｉ＝１〜ｎ）は直進光Ｐｉ（ｉ＝１〜ｎ）と逆向きであるが、横方向光線よりも下向きになる。ＬＥＤ配列灯２３の向きから見れば、第２の反射光Ｐｉ−2（ｉ＝１〜ｎ）の向きは横方向よりも下方であり、ＬＥＤ配列灯２３の上側後方に放射される。γｉ＝γ0（一定）（ｉ＝１、２、・・、ｎ）であれば、各ＬＥＤ放射光の第２の反射光は平行光線である。９０度＜γｉ＜１８０度のとき、第２の反射光Ｐｉ−2（ｉ＝１〜ｎ）は直進光Ｐｉ（ｉ＝１〜ｎ）と逆向きであるが、横方向光線よりも上向きになる。ＬＥＤ配列灯２３の向きから見れば、第２の反射光Ｐｉ−2（ｉ＝１〜ｎ）の向きは横方向よりも上方であり、ＬＥＤ配列灯２３の上側後方に放射される。γｉ＝γ0（一定）（ｉ＝１、２、・・、ｎ）であれば、各ＬＥＤ放射光の第２の反射光は平行光線である。 If the angle between the tangential plane Gi and the tangential plane Hi is γi, then αi + βi = γi. As described with reference to FIGS. 1 to 3, when 0 <γi <90 degrees, the second reflected light Pi-2 (i = 1 to n) is opposite to the straight light Pi (i = 1 to n). Yes, but below the transverse ray. When viewed from the direction of the LED array lamp 23, the direction of the second reflected light Pi-2 (i = 1 to n) is lower than the lateral direction, and is emitted to the upper rear side of the LED array lamp 23. If γi = γ0 (constant) (i = 1, 2,..., n), the second reflected light of each LED radiation light is a parallel light beam. When 90 degrees <γi <180 degrees, the second reflected light Pi-2 (i = 1 to n) is opposite to the straight traveling light Pi (i = 1 to n), but is more upward than the lateral light beam. Become. When viewed from the direction of the LED array lamp 23, the direction of the second reflected light Pi-2 (i = 1 to n) is higher than the lateral direction, and is emitted to the upper rear side of the LED array lamp 23. If γi = γ0 (constant) (i = 1, 2,..., n), the second reflected light of each LED radiation light is a parallel light beam.
γｉ＝９０度のときに、第２の反射光Ｐｉ−2（ｉ＝１〜ｎ）は直進光Ｐｉ（ｉ＝１〜ｎ）と逆向きで平行な光線となる。すなわち、第２の反射光Ｐｉ−2（ｉ＝１〜ｎ）の向きは、直進光Ｐｉ（ｉ＝１〜ｎ）の向きに対して、１８０度となる。ＬＥＤ配列灯２３の向きから見れば、第２の反射光Ｐｉ−2（ｉ＝１〜ｎ）の向きは横方向（１８０度の向き）であり、ＬＥＤ配列灯２３の上側後方に放射される。すなわち、ＬＥＤ配列灯２３によって、その後方（上側真後ろ）にあるＬＥＤ照明装置２１の外側にある物体や空間を照らすことができる。各ＬＥＤ放射光の第２の反射光は平行光線である。 When γi = 90 degrees, the second reflected light Pi-2 (i = 1 to n) is a light beam in the opposite direction and parallel to the straight traveling light Pi (i = 1 to n). That is, the direction of the second reflected light Pi-2 (i = 1 to n) is 180 degrees with respect to the direction of the straight light Pi (i = 1 to n). When viewed from the direction of the LED array lamp 23, the direction of the second reflected light Pi-2 (i = 1 to n) is the lateral direction (direction of 180 degrees), and is emitted to the upper rear side of the LED array lamp 23. . In other words, the LED array lamp 23 can illuminate an object or space outside the LED illumination device 21 behind (upper right behind) the LED illumination device 21. The second reflected light of each LED radiation is a parallel light beam.
尚、ＬＥＤも厳密に言えば完全な点（あるいは線）光源ではなくある程度の幅があり、その放射方向も同じ方向ではなくある程度広がって放射される。さらに複数のＬＥＤを基板等に配置してＬＥＤ配列灯を作製する際の実装方法によるＬＥＤの配置バラツキによるバラツキもある。また直進性があると言っても距離が長くなるに従い徐々に散乱され広がっていく。また第１の反射鏡や第２の反射鏡の反射面自体の実際の入射角度や反射角度がバラツク場合も考慮する必要がある。さらにＬＥＤにキャップをカバーする場合はある程度の広がりを持って放射される。 Strictly speaking, the LED is not a perfect point (or line) light source but has a certain width, and the radiation direction is not the same direction but is spread to some extent. Furthermore, there is also variation due to variation in LED arrangement due to a mounting method when a plurality of LEDs are arranged on a substrate or the like to produce an LED array lamp. Moreover, even if it says that there is a straight line, it gradually scatters and spreads as the distance increases. It is also necessary to consider the case where the actual incident angle and reflection angle of the reflecting surfaces of the first reflecting mirror and the second reflecting mirror vary. Further, when the LED is covered with a cap, it is emitted with a certain extent.
従ってＬＥＤ光を一定の方向に取りだす場合には一定の幅を考慮する必要がある。そこで、ＬＥＤの放射光の第２の反射光をある方向に取りだす場合にも、第１の反射鏡および第２の反射鏡のなす角度γの範囲を一定範囲内で許容する必要がある。たとえば、ＬＥＤ光を完全な後方（ＬＥＤの直進光に対して１８０度方向）に対する一定の幅を持った方向へ照射する（取りだす場合）には、好適には、８０度＜γ＝α＋β＜１００度、もっと好適には８５度＜γ＝α＋β＜９５度、最適にはγ＝α＋β＝９０度とするように第１の反射鏡２５および第２の反射鏡２７をＬＥＤ配列灯２３に対して配置すると良い。 Therefore, when LED light is taken out in a certain direction, it is necessary to consider a certain width. Therefore, even when the second reflected light of the emitted light of the LED is extracted in a certain direction, it is necessary to allow the range of the angle γ formed by the first reflecting mirror and the second reflecting mirror within a certain range. For example, in order to irradiate the LED light in a direction having a certain width with respect to the complete rear direction (180 degree direction with respect to the straight light of the LED) (when taking out), preferably, 80 degrees <γ = α + β <100 Degrees, more preferably 85 degrees <γ = α + β <95 degrees, and most preferably, γ = α + β = 90 degrees, with respect to the LED array lamp 23 with respect to the LED array lamp 23. It is good to arrange.
ＬＥＤ配列灯２３内における各ＬＥＤ（Ｌi（i＝１〜ｎ）、ｎは正の整数）の第２の反射光Ｐｉ−2がこの順番で第２の反射光Ｐ1−2およびＰｎ−2の間に存在するためには、入射角αｉ（i＝１〜ｎ）に関して、９０度−α1＜・・・＜９０度−αi＜・・・＜９０度−αｎ、すなわち、α1＞・・・＞αi＞・・・＞αｎとなるような接平面Ｇｉ（ｉ＝１〜ｎ）を有する曲面２５を作製すれば良い。かつ入射角βｉ（i＝１〜ｎ）に関して、９０度−β1＞・・・＞９０度−βi＞・・・＞９０度−βｎ、すなわち、β1＜・・・＜βi＜・・・＜βｎとなるような接平面Ｈｉ（ｉ＝１〜ｎ）を有する曲面２７を作製すれば良い。 The second reflected light Pi-2 of each LED (Li (i = 1 to n), n is a positive integer) in the LED array lamp 23 is the second reflected light P1-2 and Pn-2 in this order. In order to exist between them, with respect to the incident angle αi (i = 1 to n), 90 degrees−α1 <... <90 degrees−αi <... <90 degrees−αn, that is, α1>. A curved surface 25 having a tangent plane Gi (i = 1 to n) such that> αi>. And with respect to the incident angle βi (i = 1 to n), 90 degrees−β1>...> 90 degrees−βi>...> 90 degrees−βn, that is, β1 <. A curved surface 27 having a tangential plane Hi (i = 1 to n) that becomes βn may be produced.
さらに、第１の曲面反射鏡２５はなめらかに連続しているので、Ｄ１、・・・、Ｄｉ、・・・、Ｄｎを結ぶ第１の曲面反射鏡２５の曲線は、Ｄ１〜Ｄｎの区間で微分可能である必要がある。第２の曲面反射鏡２７もなめらかに連続しているので、Ｅ１、・・・、Ｅｉ、・・・、Ｅｎを結ぶ第２の曲面反射鏡２７の曲線は、Ｅ１〜Ｅｎの区間で微分可能である必要がある。 Furthermore, since the first curved reflector 25 is smoothly continuous, the curve of the first curved reflector 25 connecting D1,..., Di,. Must be differentiable. Since the second curved reflecting mirror 27 is also smoothly continuous, the curve of the second curved reflecting mirror 27 connecting E1,..., Ei,. Need to be.
さらに、上述したように、α＋β＝γが成り立ち、たとえば、ＬＥＤ配列灯２３に対して完全に後方（１８０度）に第２の反射光を照射するには、α＋β＝γ＝９０度であり、バラツキ（一定幅）を考慮すれば、好適には８０度＜γ＝α＋β＜１００度、もっと好適には８５度＜γ＝α＋β＜９５度、最適にはγ＝α＋β＝９０度とする。）また、第１の曲面反射鏡２５と第２の曲面反射鏡２７は接続する必要はなく、ＬＥＤ配列灯２３内のＬＥＤの反射光が及ばない部分に曲面反射鏡を設ける必要はない。たとえば、図４においては、第１の曲面反射鏡２５上のＤnおよび第２の曲面反射鏡２７のE１点の間の曲面は不要であるから、ＬＥＤ照明装置２１は小型化することもできる。 Furthermore, as described above, α + β = γ holds, and, for example, to irradiate the second reflected light completely (180 degrees) rearward with respect to the LED array lamp 23, α + β = γ = 90 degrees, Considering the variation (constant width), preferably 80 degrees <γ = α + β <100 degrees, more preferably 85 degrees <γ = α + β <95 degrees, and most preferably γ = α + β = 90 degrees. In addition, it is not necessary to connect the first curved reflector 25 and the second curved reflector 27, and it is not necessary to provide a curved reflector in the portion of the LED array lamp 23 where the reflected light of the LED does not reach. For example, in FIG. 4, since the curved surface between Dn on the first curved reflecting mirror 25 and the point E1 of the second curved reflecting mirror 27 is unnecessary, the LED illumination device 21 can be downsized.
図５は、図４に示す第２の反射鏡２７を小型にした第２の反射鏡２９を示す図である。ＬＥＤ（Ｌ１）の第１の反射光Ｐ1−1におけるＤ１点からＥ１点の間のＥ１’点において、接平面Ｈ１と平行な接平面Ｈ１’を作製すると、Ｅ１’点で入射角β１に対して反射角β１を有する第２の反射光Ｐ’1−2を得る。各ＬＥＤのＬｉ（ｉ＝２〜ｎ）の第１の反射光Ｐｉ−1上でＥ１’点になめらかに連続する（微分可能な曲線になる）ように接平面Ｈｉ’との交点Ｅｉ’を求め、その交点Ｅｉ’で入射角βｉに対して反射角βｉを有する第２の反射光Ｐ’ｉ−2を得る。これをＥｎ’点まで繰り返すことによって、新しい第２の曲面反射鏡２９を得ることができる。このことから、第２の曲面反射鏡は多数作製でき、ＬＥＤ照明装置の大きさに対応させることができる。一方、第１の曲面反射鏡２５についても別の曲面反射鏡も作製できる。すなわち、第１の曲面反射鏡２５も、なめらかに連続する（微分可能な曲線になる）ような、別の曲面反射鏡も多数作製できるので、第１の曲面反射鏡２５についてもＬＥＤ照明装置の大きさに対応させることができる。このようにＬＥＤ照明装置の用途や大きさに合わせて所望のサイズや形状を有するＬＥＤ配列灯、第１の反射鏡、および第２の反射鏡を適宜選択することができる。 FIG. 5 is a diagram showing a second reflecting mirror 29 in which the second reflecting mirror 27 shown in FIG. 4 is reduced in size. When a tangential plane H1 ′ parallel to the tangential plane H1 is produced at the point E1 ′ between the points D1 and E1 in the first reflected light P1-1 of the LED (L1), the incident angle β1 is obtained at the point E1 ′. To obtain the second reflected light P′1-2 having the reflection angle β1. An intersection point Ei ′ with the tangential plane Hi ′ is formed so as to be smoothly continuous (a differentiable curve) at the point E1 ′ on the first reflected light Pi−1 of Li (i = 2 to n) of each LED. The second reflected light P′i−2 having the reflection angle βi with respect to the incident angle βi is obtained at the intersection Ei ′. By repeating this up to the En ′ point, a new second curved reflecting mirror 29 can be obtained. Thus, a large number of second curved reflecting mirrors can be produced and can be made to correspond to the size of the LED lighting device. On the other hand, another curved reflecting mirror can be produced for the first curved reflecting mirror 25. That is, since the first curved reflector 25 can be produced in a number of other curved reflectors that are smoothly continuous (become differentiable curves), the first curved reflector 25 is also an LED lighting device. Can correspond to the size. As described above, the LED array lamp, the first reflecting mirror, and the second reflecting mirror having a desired size and shape can be appropriately selected according to the application and size of the LED lighting device.
図６は、第２の反射光および第１の反射光が混在してＬＥＤ配列灯の後方に照射される場合における実施形態を示す図である。ＬＥＤ配列灯３３の最下部のＬＥＤであるＬ１から放射される直進光Ｐ１は第１の曲面反射鏡３５のＤ１点で入射角α１を有して入射し、Ｄ１点において反射角α１を有し反射されて第１の反射光Ｐ1−1となる。この第１の反射光Ｐ1−1は第２の曲面反射鏡３７のＥ１点で入射角β１を有して入射し、Ｅ１点において反射角β１を有し反射されて第２の反射光Ｐ1−2となる。第２の反射光Ｐ1−2はＬＥＤ照明装置３１の外側へ放射されて、外部の物体や空間を照射する。 FIG. 6 is a diagram showing an embodiment in the case where the second reflected light and the first reflected light are mixed and irradiated behind the LED array lamp. The straight light P1 emitted from L1 which is the lowermost LED of the LED array lamp 33 is incident at the point D1 of the first curved reflecting mirror 35 with an incident angle α1, and has a reflection angle α1 at the point D1. It is reflected and becomes the first reflected light P1-1. The first reflected light P1-1 enters at the point E1 of the second curved reflecting mirror 37 with an incident angle β1, and is reflected at the point E1 with a reflection angle β1 to be reflected by the second reflected light P1−. 2 The second reflected light P1-2 is radiated to the outside of the LED illumination device 31 and irradiates an external object or space.
ＬＥＤ配列灯３３の最上部のＬＥＤであるＬｎから放射される直進光Ｐｎは第１の曲面反射鏡３５のＤｎ点で入射角αｎを有して入射し、Ｄｎ点において反射角αｎを有し反射されて第１の反射光Ｐｎ−1となる。この第１の反射光Ｐｎ−1は第２の曲面反射鏡３７に入射することなく、ＬＥＤ照明装置３１の外側へ放射されて、外部の物体や空間を照射する。従って、第２の反射光は存在しない。 The straight traveling light Pn emitted from Ln which is the uppermost LED of the LED array lamp 33 is incident at the point Dn of the first curved reflecting mirror 35 with an incident angle αn, and has a reflection angle αn at the point Dn. It is reflected and becomes the first reflected light Pn-1. The first reflected light Pn−1 is emitted outside the LED illumination device 31 without being incident on the second curved reflecting mirror 37 to irradiate an external object or space. Therefore, there is no second reflected light.
ＬＥＤ配列灯３３の最上部のＬＥＤであるＬｎと最下部のＬＥＤであるＬ１との間に配置されているＬＥＤであるＬｉから放射される直進光Ｐｉは第１の曲面反射鏡３５のＤｉ点で入射角αｉを有して入射し、Ｄｉ点において反射角αｉを有し反射されて第１の反射光Ｐｉ−1となる。この第１の反射光Ｐｉ−1はｉ≦ｍ−１のときには、第１の反射光Ｐ1−1と同様に、第２の曲面反射鏡３７のＥｉ点で入射角βiを有して第２の曲面反射鏡３７に入射し、Ｅｉ点において反射角βｉを有し反射されて第２の反射光Ｐｉ−2となる。第２の反射光Ｐｉ−2はＬＥＤ照明装置３１の外側へ放射されて、外部の物体や空間を照射する。一方、第１の反射光Ｐｉ−1はｉ≧ｍのときには、第１の反射光Ｐｎ−1と同様に、第１の反射光Ｐｉ−1は第２の曲面反射鏡３７に入射することなく、ＬＥＤ照明装置３１の外側へ放射されて、外部の物体や空間を照射する。 The straight light Pi radiated from Li, which is an LED arranged between Ln, which is the uppermost LED of the LED array lamp 33, and L1, which is the lowermost LED, is the Di point of the first curved reflector 35. And incident at an angle of incidence αi and reflected at the point Di with a reflection angle αi to be the first reflected light Pi-1. When i ≦ m−1, the first reflected light Pi−1 has the incident angle βi at the point Ei of the second curved reflecting mirror 37 and is second as in the case of the first reflected light P1-1. , And is reflected at the point Ei with a reflection angle βi to become the second reflected light Pi-2. The second reflected light Pi-2 is emitted to the outside of the LED illumination device 31 and irradiates an external object or space. On the other hand, when the first reflected light Pi-1 is i ≧ m, the first reflected light Pi-1 is not incident on the second curved reflecting mirror 37, similarly to the first reflected light Pn-1. The light is emitted to the outside of the LED illumination device 31 to irradiate an external object or space.
以上のように本実施形態では、ＬＥＤ配列灯３３のすべてのＬＥＤからの直進光は第１の曲面反射鏡３５に入射して反射し、第１の反射光となるが、この第１の反射光が第２の曲面反射鏡３５に入射せずに、そのままＬＥＤ照明装置３１の外側へ放射される場合と、第１の反射光が第２の曲面反射鏡３５に入射して、第２の反射光となってＬＥＤ照明装置３１の外側へ放射される場合とが存在する。すなわち、第１の反射光および第２の反射光が混在してＬＥＤ照明装置３１の外側へ放射されて、外部の物体や空間を照射する。このような混在型でもＬＥＤ配列灯３３の後方へＬＥＤの反射光を放射して、外部の物体や空間を照射することができる。 As described above, in this embodiment, the straight light from all the LEDs of the LED array lamp 33 enters the first curved reflecting mirror 35 and is reflected to become the first reflected light. This first reflection In the case where light does not enter the second curved reflecting mirror 35 and is emitted as it is to the outside of the LED lighting device 31, the first reflected light enters the second curved reflecting mirror 35 and the second There are cases where the light is reflected and emitted outside the LED lighting device 31. That is, the first reflected light and the second reflected light are mixed and emitted to the outside of the LED lighting device 31 to irradiate an external object or space. Even in such a mixed type, it is possible to irradiate an external object or space by emitting reflected light of the LED to the rear of the LED array lamp 33.
図７は、本発明の応用例を示す図である。図７は、曲面反射鏡の下側における略半曲面反射鏡４５および４６の略中心部において縦方向に、複数のＬＥＤ（Ｌｉ（ｉ＝１、・・、ａ、・・、ｂ、・・・、ｎ）、最下部のＬＥＤをＬ１、最上部のＬＥＤをＬｎとする）を有するＬＥＤ配列灯４３が配置されている。曲面反射鏡の上側における略半曲面反射鏡４７および４８は透明ガラスまたは透明プラスチックで構成されている。ＬＥＤ（Ｌ１）から放射された直進光はＬＥＤ前方にある下側曲面反射鏡４５で反射して反射光（第１の反射光）となり、上側曲面反射鏡４７に入射する。上側曲面反射鏡４７は透明ガラスまたは透明プラスチックであるから、一部は反射してＬＥＤ配列灯４３の上側の後方へ反射光Ｑ１（第２の反射光）となる。この反射光Ｑ１はＬＥＤ配列灯４３の上側の後方にある曲面反射鏡４８に入射する。一部は曲面反射鏡４８を透過してＬＥＤ照明装置４１の外側へ放射されて、外部にある物体や空間を照射する。あるいは、目を向ければＬＥＤを視認できる。曲面反射鏡４８がなければ、曲面反射鏡４８で反射した反射光Ｑ１は全部ＬＥＤ照明装置４１の外側へ放射される。他の複数のＬＥＤ（たとえば、Ｌａ、Ｌｂ）からの放射光も下側曲面反射鏡４５で反射して、この反射光（第１の反射光）が上側曲面反射鏡４７に入射し、さらに上側曲面反射鏡４７で反射して反射光（たとえば、Ｑａ、Ｑｂ）（第２の反射光）がＬＥＤ配列灯４３の上側の後方にある曲面反射鏡４８に入射し、一部は曲面反射鏡４８を透過してＬＥＤ照明装置４１の外側へ放射されて、外部にある物体や空間を照射する。 FIG. 7 is a diagram showing an application example of the present invention. FIG. 7 shows a plurality of LEDs (Li (i = 1,..., A,..., B,...) In the vertical direction at the substantially central portions of the substantially semi-curved reflectors 45 and 46 below the curved reflector. N), an LED array lamp 43 having a lowermost LED L1 and an uppermost LED Ln) is disposed. The substantially half curved reflectors 47 and 48 on the upper side of the curved reflector are made of transparent glass or transparent plastic. The straight-ahead light radiated from the LED (L1) is reflected by the lower curved reflecting mirror 45 in front of the LED to become reflected light (first reflected light), and enters the upper curved reflecting mirror 47. Since the upper curved reflector 47 is made of transparent glass or transparent plastic, a part of it is reflected and becomes reflected light Q1 (second reflected light) to the upper rear side of the LED array lamp 43. The reflected light Q1 is incident on the curved reflecting mirror 48 on the upper rear side of the LED array lamp 43. A part of the light passes through the curved reflector 48 and is emitted to the outside of the LED illumination device 41 to irradiate an object or space outside. Alternatively, the LED can be visually recognized by looking at the eyes. Without the curved reflecting mirror 48, the reflected light Q1 reflected by the curved reflecting mirror 48 is entirely radiated to the outside of the LED illumination device 41. Radiated light from other LEDs (for example, La and Lb) is also reflected by the lower curved reflector 45, and this reflected light (first reflected light) is incident on the upper curved reflector 47, and further on the upper side. The reflected light (for example, Qa, Qb) (second reflected light) reflected by the curved reflecting mirror 47 is incident on the curved reflecting mirror 48 on the upper rear side of the LED array lamp 43, and a part thereof is the curved reflecting mirror 48. Is transmitted to the outside of the LED illumination device 41 to irradiate an object or space outside.
上側曲面反射鏡４７に入射する光の一部は透過してＬＥＤ照明装置４１の外側へ放射されるので、その外側も照射されるし、ＬＥＤ光を視認することもできる。しかし、曲面反射鏡４７に入射する光を全反射することができれば、反射光Ｑ１等による後方照射の効率を高めることができる。曲面反射鏡４７は透明ガラスまたは透明プラスチックであるから入射光がこの曲面反射鏡４７の内部へ入っていく。通常はこの光は曲面反射鏡４７の内部で吸収されたり散乱されたりしながら、外側へ透過していくが、曲面反射鏡４７の屈折率をｇ47としたとき、ｓｉｎβ１＞１／g47を満足したときに、曲面反射鏡４７の外側へ透過せずに全反射していく。たとえば、ｇ47＝１．５とすれば、ｓｉｎβ１＞０．６７すなわち、β１＞４２度となるように入射角β１を調整すれば良い。尚、曲面反射鏡４７に光が入射するときに一部が散乱したり反射したりして失われるので、ＬＥＤ照明装置４１内空間４９を曲面反射鏡４７の屈折率と同じ（または近い）液体材料で満たすことによって、全反射する光の効率を高めることができる。たとえば、曲面反射鏡４７を屈折率１．５のガラスとして、液体材料をパラフィン油（屈折率１．４８）とすれば良い。 A part of the light incident on the upper curved reflecting mirror 47 is transmitted and emitted to the outside of the LED illumination device 41, so that the outside is also irradiated and the LED light can be visually recognized. However, if the light incident on the curved reflecting mirror 47 can be totally reflected, the efficiency of back irradiation with the reflected light Q1 or the like can be increased. Since the curved reflecting mirror 47 is made of transparent glass or transparent plastic, incident light enters the curved reflecting mirror 47. Normally, this light is transmitted to the outside while being absorbed or scattered inside the curved reflecting mirror 47. However, when the refractive index of the curved reflecting mirror 47 is g47, sin β1> 1 / g47 is satisfied. Sometimes, it is totally reflected without transmitting to the outside of the curved reflecting mirror 47. For example, when g47 = 1.5, the incident angle β1 may be adjusted so that sin β1> 0.67, that is, β1> 42 degrees. Note that when the light is incident on the curved reflecting mirror 47, a part of the light is scattered or reflected and lost, so that the liquid space in the LED lighting device 41 is the same (or close) as the refractive index of the curved reflecting mirror 47. By filling with a material, the efficiency of the totally reflected light can be increased. For example, the curved reflecting mirror 47 may be made of glass having a refractive index of 1.5, and the liquid material may be paraffin oil (refractive index of 1.48).
図７においては、図６と同様に、ＬＥＤからの第１の反射光がすべて第２の反射鏡である上側曲面反射鏡４７に入射するわけではなく、ＬＥＤ配列灯４３の上部にあるＬＥＤ（Ｌｉ、・・・、Ｌｎ）からの第１の反射光は、たとえばＱｉ、・・・、Ｑｎとして、ＬＥＤ配列灯４３の上側の後方にある曲面反射鏡４８に入射し、一部は曲面反射鏡４８を透過してＬＥＤ照明装置４１の外側へ放射されて、外部にある物体や空間を照射する。 In FIG. 7, as in FIG. 6, not all of the first reflected light from the LED is incident on the upper curved reflector 47 that is the second reflector, but the LED ( The first reflected light from Li,..., Ln) is incident on the curved reflecting mirror 48 on the upper rear side of the LED array lamp 43, for example, as Qi,. The light passes through the mirror 48 and is emitted to the outside of the LED illumination device 41 to irradiate an object or space outside.
ＬＥＤ（Ｌｉ）からの直進光が曲面反射鏡４５に入射する所をＤｉとし、入射角をαｉとする。ＬＥＤ（Ｌｉ）とＤｉまでの距離をｔｉ、ＬＥＤ（Ｌｉ）からＬＥＤ配列灯の最上部（第１の反射光を遮る最上部）までの長さをｈｉとすると、第１の反射光Ｑｉを遮らないようにするためには、ｈｉ＜ｔｉ（tan２αｉ）を満足するようにすれば良い。また、ＬＥＤ（Ｌｉ）から上側曲面反射鏡４７の最上部までの距離をｕｉとすれば、第１の反射光Ｑｉが上側曲面反射鏡４７に入射しないようにするためには、ｕｉ＞ｔｉ（tan２αｉ）とすれば良い。以上のように設計することによって、ＬＥＤ配列灯の下側に配置されたＬＥＤからの放射光を２回反射させて外部へ放射し、ＬＥＤ配列灯の上側に配置されたＬＥＤからの放射光を１回だけ反射させてＬＥＤ装置等４３の後方の外部へ放射させる図７に示すＬＥＤ照明装置４１を作製することができる。 Let Di be the place where the straight light from the LED (Li) enters the curved reflecting mirror 45, and let αi be the incident angle. When the distance from the LED (Li) to Di is ti, and the length from the LED (Li) to the top of the LED array lamp (the top that blocks the first reflected light) is hi, the first reflected light Qi is In order not to block, it is only necessary to satisfy hi <ti (tan 2αi). Further, if the distance from the LED (Li) to the uppermost portion of the upper curved reflector 47 is ui, in order to prevent the first reflected light Qi from entering the upper curved reflector 47, ui> ti ( tan2αi). By designing as described above, the emitted light from the LED arranged on the lower side of the LED array lamp is reflected twice and emitted to the outside, and the emitted light from the LED arranged on the upper side of the LED array lamp is emitted. The LED illumination device 41 shown in FIG. 7 can be produced that is reflected only once and is emitted to the outside behind the LED device 43.
図７に示すＬＥＤ照明装置４１における曲面反射鏡４５、４６並びに４７、４８が回転体（たとえば、楕円球体）であるとすれば、ＬＥＤ配列灯４３を回転させることによって、全方位へ光を放射することができる。（たとえば、ミラーボールのように使用できる。）ＬＥＤ照明装置４１自体を回転させても良いが、ＬＥＤ照明装置４１自体の移動（回転）はないため不思議な雰囲気を演出することができる。尚、図７に示すＬＥＤはＬＥＤの進行方向にキャップを被せているので、このキャップによって少しブロードな光として放射される。このことは、上述した一定の幅を有したＬＥＤ放射光として解釈すれば良い。 If the curved reflecting mirrors 45, 46 and 47, 48 in the LED lighting device 41 shown in FIG. 7 are rotating bodies (for example, elliptical spheres), light is emitted in all directions by rotating the LED array lamp 43. can do. (For example, it can be used like a mirror ball.) The LED illumination device 41 itself may be rotated, but since the LED illumination device 41 itself is not moved (rotated), a mysterious atmosphere can be produced. Since the LED shown in FIG. 7 has a cap in the traveling direction of the LED, it is emitted as a little broad light by this cap. This may be interpreted as LED radiation having a certain width as described above.
図８は、ＬＥＤ配列灯５３を横（水平）置きにし、（平面）反射鏡５５を使用したときの反射光を示す図である。ＬＥＤ配列灯５３を横（水平）置きにし、ＬＥＤ配列灯５３の各ＬＥＤ（Ｌ１、・・・、Ｌｎ）から（平面）反射鏡５５への入射角をαとすると、ＬＥＤ配列灯５３の各ＬＥＤ（Ｌ１、・、Ｌｉ、・・、Ｌｎ）から出た光は、０＜α＜９０度のときに横（水平）方向に第１の反射光Ｑｉ（ｉ＝１、２、・・・、ｎ）が反射されて、ＬＥＤ照明装置５１の外側へ出ていき、外部の物体や空間を照射する。また外側からＬＥＤを視認できる。０＜α＜４５度のときに第１の反射光Ｑｉは下向きに平行に出ていくが、αの角度によっては第１の反射光ＱｉはＬＥＤ配列灯５３に当たる場合がある。４５度＜αのときには、第１の反射光Ｑｉは上向きに平行に出ていく。α＝４５度のときに、第１の反射光Ｑｉは横方向に平行に出ていき、装置５１から見れば後方に照射されている。このようにＬＥＤ配列灯５３を横置きにすると、1枚の（平面）反射鏡５５で、後方への反射光（照射光）を得ることができる。 FIG. 8 is a diagram showing reflected light when the LED array lamp 53 is placed horizontally (horizontal) and a (planar) reflecting mirror 55 is used. When the LED array lamp 53 is placed horizontally (horizontal) and the incident angle from the LEDs (L1,..., Ln) of the LED array lamp 53 to the (planar) reflecting mirror 55 is α, each of the LED array lamps 53 is arranged. The light emitted from the LEDs (L1,..., Li,..., Ln) is the first reflected light Qi (i = 1, 2,...) In the lateral (horizontal) direction when 0 <α <90 degrees. , N) is reflected and goes out of the LED illumination device 51 to irradiate an external object or space. Moreover, LED can be visually recognized from the outside. When 0 <α <45 degrees, the first reflected light Qi is emitted downward in parallel, but the first reflected light Qi may strike the LED array lamp 53 depending on the angle α. When 45 degrees <α, the first reflected light Qi is emitted upward in parallel. When α = 45 degrees, the first reflected light Qi is emitted in parallel in the lateral direction, and is irradiated backward as viewed from the device 51. When the LED array lamp 53 is placed sideways in this manner, reflected light (irradiation light) to the rear can be obtained with a single (planar) reflecting mirror 55.
本発明のＬＥＤ照明装置は、ＬＥＤからの指向性の強い直進光を反射鏡で反射させた反射光を外部へ照射する装置であるが、反射鏡で適度に拡散分散し、また適度に広げて外部へ放射するものであるから、ＬＥＤからの直進光と比較すると、ブロードな光となり周辺も比較的明るくなる。しかも反射鏡を用いているのでＬＥＤ光源を視認できるという利点もある。図１〜図７においては、ＬＥＤ配列灯は縦方向に対して一列で記載しているが、奥行き側に複数列のＬＥＤ配列灯を配置しても良い。この場合、各反射鏡（第１の反射鏡、第２の反射鏡）は同じ大きさで同じ形状のものを奥行き側に作製しても良いし、奥行き側に曲面を持たせて作製しても良い。これらの奥行き側の曲面は、上述した様に多数の曲面反射鏡を用いることができるので、本発明に記載した条件に基づいて適宜設計すれば良い。また、第１の反射鏡に上述した平面鏡を用いて、第２の反射鏡に上述した曲面反射鏡を用いても良いし、あるいは、第１の反射鏡に上述した曲面反射鏡を用いても良いし、第２の反射鏡に上述した平面反射鏡を用いても良い。これらを適宜組み合わせたとき、図６および図７で述べたように、第１の反射光の一部はＬＥＤ配列灯の後方へそのまま放射される場合もあるが、用途に応じてそのような方法を適宜選択すれば良い。本発明で述べた反射鏡は、たとえば球面、楕円面、双曲面、
あるいは円錐面である。また反射鏡としてガラス、プラスチック、金属等通常使用している材料を使うことができる。反射面に反射塗膜や金属膜等をコーティングしても良い。
The LED lighting device of the present invention is a device that irradiates the reflected light, which is reflected by a reflecting mirror, with a highly directional straight beam from the LED, but is appropriately diffused and dispersed by the reflecting mirror, and is also appropriately spread. Since it radiates to the outside, it becomes broader light and the surroundings are relatively brighter than the straight light from the LED. Moreover, since the reflecting mirror is used, there is an advantage that the LED light source can be visually recognized. In FIG. 1 to FIG. 7, the LED array lamps are described in a single line with respect to the vertical direction, but a plurality of LED array lamps may be arranged on the depth side. In this case, each reflecting mirror (first reflecting mirror, second reflecting mirror) having the same size and shape may be fabricated on the depth side, or may be fabricated with a curved surface on the depth side. Also good. Since the curved surfaces on the depth side can use a large number of curved reflecting mirrors as described above, they may be appropriately designed based on the conditions described in the present invention. Alternatively, the above-described flat mirror may be used as the first reflecting mirror, the above-described curved reflecting mirror may be used as the second reflecting mirror, or the above-described curved reflecting mirror may be used as the first reflecting mirror. Alternatively, the above-described planar reflecting mirror may be used as the second reflecting mirror. When these are appropriately combined, as described in FIG. 6 and FIG. 7, a part of the first reflected light may be radiated as it is to the rear of the LED array lamp, but such a method is used depending on the application. May be selected as appropriate. The reflecting mirror described in the present invention is, for example, a spherical surface, an ellipsoid, a hyperboloid,
Or it is a conical surface. Moreover, the material which is normally used, such as glass, a plastics, and a metal, can be used as a reflecting mirror. The reflective surface may be coated with a reflective coating film or a metal film.
図９は、縦（Ｚ方向）にｍ個、横（Ｘ方向）にｎ個マトリックス状に配列したＬＥＤ（Ｌｉｊ（ｉ＝１、・・、ｍ；ｊ＝１、・・、ｎ）を有するＬＥＤ配列灯（ｍ行ｘｎ列ＬＥＤマトリックス面光源、たとえば、１２行１２列、２４行２４列、２４行３６列等種々作成できる）６３、これに対応した第１の反射鏡６５、および第２の反射鏡６７を有するＬＥＤ照明装置６１の一実施形態を示す図である。図９におけるＬＥＤ照明装置６１は立体的に示されている。このｍｘｎＬＥＤ配列灯は一つの基板内にＬＥＤがマトリックス状に配置されたものであるが、ｍ個のＬＥＤが縦（Ｚ方向）に一列に配置したｎ個のＬ１１、・・・、Ｌｍｎが横（列状）につながったＬＥＤ配列灯と考えれば良く、図１〜図７等に基づいて説明したＬＥＤ照明装置に関する内容を適用できる。図９では、ＬＥＤ配列灯６３およびそこから出た直進光による反射光Ｑｉｊ（ｉ＝１、・・、ｍ；ｊ＝１、・・、ｎ）が分かりやすいように、第１の反射鏡６５および第２の反射鏡６７を破線で示しているが、これらの第１の反射鏡６５および第２の反射鏡６７は実際には連続した曲面である。ＬＥＤ配列灯の上部後方は反射光を放出するために開放されている。（あるいは図７に示すように透明なガラスやプラスチックでカバーされても良い。） FIG. 9 has LEDs (Lij (i = 1,..., M; j = 1,..., N)) arranged in a matrix form of m in the vertical direction (Z direction) and n in the horizontal direction (X direction). LED array lamp (m-row xn-column LED matrix surface light source, for example, 12 rows, 12 columns, 24 rows, 24 columns, 24 rows, 36 columns, and the like can be variously created) 63, a first reflecting mirror 65 corresponding to this, and a second It is a figure which shows one Embodiment of the LED illuminating device 61 which has the reflective mirror 67. The LED illuminating device 61 in FIG.9 is shown in three dimensions.This mxnLED array lamp has LED in matrix form in one board | substrate. However, it can be thought of as an LED array light in which m L LEDs are arranged in a row in the vertical direction (Z direction), and L pieces of L11,. LED lighting device explained based on FIG. 1 to FIG. 9, the LED array lamp 63 and the reflected light Qij (i = 1,..., M; j = 1,..., N) generated by the straight light emitted from the LED array lamp 63 are easily understood. Although the first reflecting mirror 65 and the second reflecting mirror 67 are shown by broken lines, the first reflecting mirror 65 and the second reflecting mirror 67 are actually continuous curved surfaces. The upper rear is open to emit reflected light (or it may be covered with transparent glass or plastic as shown in FIG. 7).
横に並べたｊ列目のＬＥＤ（Ｌｉｊ）（ｉ＝１、・・、ｍ）からの直進光は、第１の反射鏡の曲面（曲線）Ｓｊで反射し、この第１の反射光が第２の反射鏡の曲面（曲線）Ｔｊで反射し、第２の反射光ＱｉｊとしてＬＥＤ照明装置６１の外側へ出ていく。図１〜図７で説明した条件を満たせば、この反射光ＱｉｊはＬＥＤ配列灯６３の後方外側（逆Ｙ方向）へ出ていく。上述したようにＳｊは（ｊ＝１〜ｎ）同じ曲線でなくても良いし、Ｔｊも（ｊ＝１〜ｎ）同じ曲線でなくても良い。その場合は、第１の反射鏡６５は、図９に示すようにｎ列側（Ｘ方向）に曲線状（Ｏｉ）になり、また、第２の反射鏡６７も、図９に示すようにｎ列側（Ｘ方向）に曲線状（Ｕｉ）になる。第１の反射鏡６５における接平面と第２の反射鏡６７における接平面のなす角度が９０度を有する場合、第２の反射光ＱｉｌはＬＥＤ直進光と逆方向（逆Ｙ方向）へＬＥＤ照明灯６１の上側後方の開放部から外側へ放射される。すなわち、すべてのＱｉｊは平行光線となって逆Ｙ方向へ放射され、外部の物体や空間を照射する。尚、Ｓｊおよび／またはＴｊが同じ曲線となる場合には、上述したように、奥行き側（Ｘ方向）は同じ曲面となる。あるいは、Ｓｊおよび／またはＴｊが直線（平面鏡）の場合には奥行き側（Ｘ方向）も同じ平面鏡となっている。尚、上記ではｍ行ｘｎ列ＬＥＤマトリックス面光源と記載したが、その中の一部を取り除いているものに関しても含むことは言うまでもない。たとえば、マトリックス平面の角側を省いたものや、マトリックス平面の内側の一部を省いたものも含まれる。 The straight-ahead light from the LEDs (Lij) (i = 1,..., M) in the j-th row arranged side by side is reflected by the curved surface (curve) Sj of the first reflecting mirror, and this first reflected light is reflected. The light is reflected by the curved surface (curve) Tj of the second reflecting mirror and goes out of the LED illumination device 61 as the second reflected light Qij. If the conditions described with reference to FIGS. 1 to 7 are satisfied, the reflected light Qij goes out to the rear outside (reverse Y direction) of the LED array lamp 63. As described above, Sj may not be the same curve (j = 1 to n), and Tj may not be the same curve (j = 1 to n). In that case, the first reflecting mirror 65 is curved (Oi) on the n-row side (X direction) as shown in FIG. 9, and the second reflecting mirror 67 is also as shown in FIG. A curve (Ui) is formed on the n-row side (X direction). When the angle formed by the tangent plane in the first reflecting mirror 65 and the tangential plane in the second reflecting mirror 67 has 90 degrees, the second reflected light Qil is LED-illuminated in the direction opposite to the LED straight light (reverse Y direction). The light is radiated to the outside from the upper rear opening of the lamp 61. That is, all Qij are emitted as parallel rays in the reverse Y direction, and illuminate an external object or space. When Sj and / or Tj are the same curve, as described above, the depth side (X direction) is the same curved surface. Alternatively, when Sj and / or Tj is a straight line (plane mirror), the depth side (X direction) is also the same plane mirror. In addition, although it described as an m-row xn-column LED matrix surface light source in the above, it cannot be overemphasized that it includes also about what remove | eliminated one part in it. For example, a case where the corner side of the matrix plane is omitted and a case where a part inside the matrix plane is omitted are included.
尚、明細書のある部分に記載し説明した内容について記載しなかった他の部分においても矛盾なく適用できることに関しては、当該他の部分に当該内容を適用できることは言うまでもない。さらに、前記実施形態は一例であり、要旨を逸脱しない範囲内で種々変更して実施でき、本発明の権利範囲が前記実施形態に限定されないことも言うまでもない。 In addition, it cannot be overemphasized that the said content can be applied to the said other part regarding that it can apply without contradiction also to the other part which was not described about the content described and demonstrated in a certain part of the specification. Furthermore, the above-described embodiment is an example, and various modifications can be made without departing from the scope of the invention. Needless to say, the scope of rights of the present invention is not limited to the above-described embodiment.
本発明の反射鏡を用いたＬＥＤ照明装置は、照明装置だけでなく、玩具、置物としても使用できる。 The LED lighting device using the reflecting mirror of the present invention can be used not only as a lighting device but also as a toy and an ornament.
１１・・・ＬＥＤ照明装置、１３・・・ＬＥＤ配列灯、
１５・・・第１の反射鏡（平面反射鏡）、１７・・・第２の反射鏡（平面反射鏡）、
２１・・・ＬＥＤ照明装置、２３・・・ＬＥＤ配列灯、
２５・・・第１の曲面反射鏡、２７・・・第２の曲面反射鏡、
２９・・・第２の曲面反射鏡、
３１・・・ＬＥＤ照明装置、３３・・・ＬＥＤ配列灯、
３５・・・第１の曲面反射鏡、３７・・・第２の曲面反射鏡、
４１・・・ＬＥＤ照明装置、４３・・・ＬＥＤ配列灯、
４５・・・第１の曲面反射鏡、４６・・・第１の曲面反射鏡、
４７・・・第２の曲面反射鏡、４８・・・第２の曲面反射鏡、
４９・・・ＬＥＤ照明装置内空間、
５１・・・ＬＥＤ照明装置、５３・・・ＬＥＤ配列灯、
５５・・・平面反射鏡、
６１・・・ＬＥＤ照明装置、
６３・・・ＬＥＤ配列灯（ｍ行ｘｎ列ＬＥＤマトリックス面光源）、
６５・・・第１の（曲面）反射鏡、６７・・・第２の（曲面）反射鏡、
11 ... LED lighting device, 13 ... LED array lamp,
15 ... 1st reflecting mirror (planar reflecting mirror), 17 ... 2nd reflecting mirror (planar reflecting mirror),
21 ... LED lighting device, 23 ... LED array lamp,
25 ... 1st curved reflector, 27 ... 2nd curved reflector,
29 ... second curved reflector,
31 ... LED lighting device, 33 ... LED array lamp,
35 ... 1st curved reflector, 37 ... 2nd curved reflector,
41 ... LED lighting device, 43 ... LED array lamp,
45... First curved reflector, 46... First curved reflector,
47 ... second curved reflector, 48 ... second curved reflector,
49 ... Space inside the LED lighting device,
51 ... LED lighting device, 53 ... LED array lamp,
55 ... plane reflector,
61 ... LED lighting device,
63 ... LED array lamp (m row xn column LED matrix surface light source),
65 ... first (curved surface) reflecting mirror, 67 ... second (curved surface) reflecting mirror,
Claims (7)
前記曲面反射鏡は下側半曲面反射鏡と上側半曲面反射鏡からなり、The curved reflector comprises a lower half curved reflector and an upper half curved reflector,
前記上側半曲面反射鏡は透明ガラスまたは透明プラスチックから構成されており、The upper half curved reflector is made of transparent glass or transparent plastic,
前記ＬＥＤ配列灯は前記下側半曲面反射鏡の中心部に配置され、ここで、前記ＬＥＤ配列灯の縦方向は前記曲面反射鏡の上下方向であり、The LED array lamp is disposed at the center of the lower half curved reflector, wherein the vertical direction of the LED array lamp is the vertical direction of the curved reflector,
前記ＬＥＤ配列灯から出射されるＬＥＤ光は、ＬＥＤ前方の前記下側半曲面反射鏡で反射して（これを第１の反射光とする）前記上側半曲面反射鏡に入射し、The LED light emitted from the LED array lamp is reflected by the lower half curved reflector in front of the LED (this is referred to as first reflected light) and enters the upper half curved reflector,
第１の反射光の一部または全部は前記上側半曲面反射鏡で反射して（これを第２の反射光とする）前記上側半曲面反射鏡に入射し、Part or all of the first reflected light is reflected by the upper semi-curved reflector (this is referred to as second reflected light) and enters the upper semi-curved reflector.
第２の反射光の一部は前記上側半曲面反射鏡で透過して前記上側半曲面反射鏡の外側へ照射されることを特徴とするＬＥＤ照明装置。A part of 2nd reflected light permeate | transmits with the said upper semi-curved reflector, and is irradiated to the outer side of the said upper semi-curved reflector.
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