JP5178796B2 - Light emitting device and lighting device - Google Patents
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Description
本発明は、発光装置及び照明装置に関するものである。本発明は、特に、発光ダイオード（ＬＥＤ；Ｌｉｇｈｔ・Ｅｍｉｔｔｉｎｇ・Ｄｉｏｄｅ）を光源とし一般照明器具や表示用照明器具として利用可能な装置に関するものである。 The present invention relates to a light emitting device and a lighting device. In particular, the present invention relates to an apparatus that can be used as a general lighting fixture or a display lighting fixture using a light emitting diode (LED) as a light source.
これまでＬＥＤパッケージを用い高出力化、発光効率向上、装置外観向上を目的とした装置構造に係る技術提案は少なくない。最も基本的な構成は拡散発光タイプ、又は、光軸方向で強い光度を有するような狭角タイプのＬＥＤを用い、その周辺のリフレクタの形状や配置等に特徴を持たせる構成である（例えば、特許文献１，２参照）。特許文献１，２は拡散タイプＬＥＤを用いそのリフレクタに特徴を持たせたものである。 Until now, there have been many technical proposals related to the device structure for the purpose of increasing the output, improving the luminous efficiency, and improving the appearance of the device using the LED package. The most basic configuration is a diffuse emission type or a narrow-angle type LED that has a strong luminous intensity in the optical axis direction, and is characterized by the shape and arrangement of the reflectors around it (for example, (See Patent Documents 1 and 2). In Patent Documents 1 and 2, a diffused type LED is used and the reflector is characterized.
特許文献１では、装置正面方向の高照度化を狙いリフレクタ形状等に特徴を持たせた装置構造で均一照度分布や発光効率向上を実現できるとしているが、各ＬＥＤの光軸方向の光放射強度が大きいため、被照明空間、特に装置直下から装置を見込んだ場合の輝度が高く、それによる不快グレア（眩しさ）が大きいといった課題があった。 In Patent Document 1, it is said that a uniform illuminance distribution and an improvement in luminous efficiency can be realized with a device structure characterized by a reflector shape and the like aiming at high illuminance in the front direction of the device. Therefore, there is a problem that the luminance when the device is viewed from the illumination space, particularly directly under the device, is high, and the unpleasant glare (glare) due to this is large.
特許文献２では、特許文献１のリフレクタとは形状が異なるが照明効率を高めるリフレクタ配置構造で、かつ、そのリフレクタ面積が広く装置全体が明るく感じられるとしている。しかしながらやはり各々のＬＥＤの正面方向には強い光が放たれており、装置を見込んだ際、特に各ＬＥＤ配置部分の輝度が強く、やはり不快グレア（眩しさ）が大きい、あるいは、ＬＥＤ光源の粒々の輝きが不快であるといった課題があった。 In Patent Document 2, although the shape is different from the reflector of Patent Document 1, it is a reflector arrangement structure that increases the illumination efficiency, and the reflector area is large and the entire apparatus is felt bright. However, too, strong light is emitted in the front direction of each LED, and when looking at the device, the brightness of each LED arrangement portion is particularly strong and unpleasant glare (glare) is still great, or the LED light source is broken. There was a problem that the shine of was unpleasant.
本発明は、例えば、装置を見込んだ際の不快グレアを極力抑えながらも発光効率の良好な発光装置を提供することを目的とする。また、例えば、そのような低グレア発光装置で単一色ＬＥＤを用いるような場合に、色変換部材を用いて容易に光色の変更を可能にすることをも目的とする。 An object of the present invention is, for example, to provide a light emitting device with good luminous efficiency while suppressing unpleasant glare when the device is expected. In addition, for example, when a single color LED is used in such a low glare light emitting device, it is also an object to make it possible to easily change the light color using a color conversion member.
本発明の一の態様に係る発光装置は、
光を照射するＬＥＤであって、光軸から所定の角度傾いた方向である非軸方向の光度が光軸方向の光度より大きいＬＥＤと、
前記ＬＥＤの光軸方向に開口部が設けられた筒状のリフレクタであって、少なくとも前記ＬＥＤから前記ＬＥＤの非軸方向に照射される光を内側面で反射して当該開口部から出射するリフレクタとを備える。
A light emitting device according to one embodiment of the present invention includes:
An LED that irradiates light, the LED having a non-axis direction light intensity that is a direction inclined by a predetermined angle from the optical axis, and a light intensity greater than the light intensity in the optical axis direction;
A cylindrical reflector provided with an opening in the optical axis direction of the LED, the reflector reflecting at least the light emitted from the LED in the non-axis direction of the LED on the inner surface and exiting from the opening With.
本発明の一の態様によれば、発光装置が、光軸から所定の角度傾いた方向である非軸方向の光度が光軸方向の光度より大きいＬＥＤからＬＥＤの非軸方向に照射される光を内側面で反射して開口部から出射するリフレクタを備えるため、不快グレアの発生を抑えつつ、装置の光利用効率や発光効率を高めることができる。 According to one aspect of the present invention, the light emitted from the LED in the non-axis direction of the LED from the LED in which the light intensity in the non-axis direction, which is a direction inclined by a predetermined angle from the optical axis, is greater than the light intensity in the optical axis direction Therefore, the light utilization efficiency and the light emission efficiency of the apparatus can be improved while suppressing the occurrence of unpleasant glare.
以下、本発明の実施の形態について、図を用いて説明する。なお、断面図では、便宜上、断面を表すためではなく部材を区別するためにハッチングを用いている。 Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the cross-sectional view, hatching is used for the sake of convenience, not to represent the cross section but to distinguish the members.
実施の形態１．
図１は、本実施の形態に係る発光装置１０の一構成例を示す図である。図１（ａ）は、図１（ｂ）のＢ点線の位置でみた発光装置１０（一部）の上断面図である。図１（ｂ）は、図１（ａ）のＡ点線の位置でみた発光装置１０（一部）の側断面図である。図１（ｃ）は、図１（ａ）のＣ点線の位置でみた発光装置１０の側断面図である。
Embodiment 1 FIG.
FIG. 1 is a diagram illustrating a configuration example of a light emitting device 10 according to the present embodiment. FIG. 1A is a top cross-sectional view of a part of the light emitting device 10 as viewed from the position of the dotted line B in FIG. FIG. 1B is a side cross-sectional view of the light-emitting device 10 (a part) as seen from the position of the dotted line A in FIG. FIG. 1C is a cross-sectional side view of the light emitting device 10 as viewed from the position of the dotted line C in FIG.
発光装置１０は、基板１１と、その上に実装されたサイドエミット型のＬＥＤ１２とを備える。ＬＥＤ１２は、ライン状に複数実装されている。発光装置１０は、ＬＥＤ１２の周囲には光を上方に反射させる、望ましくは高反射率の反射面１５を有するリフレクタ１４を備えている。発光装置１０は、基板１１とリフレクタ１４の間には、基板１１の表面露出を避けつつリフレクタ１４を取り付け可能なリフレクタ支持部１３を備える。発光装置１０は、さらには必要に応じて、ＬＥＤ１２やリフレクタ１４の表面の保護、また、例えば発光光の透過率制御を行うような透光性の表面カバー１６を備えている。 The light emitting device 10 includes a substrate 11 and a side-emitting LED 12 mounted thereon. A plurality of LEDs 12 are mounted in a line. The light emitting device 10 includes a reflector 14 having a reflecting surface 15 that preferably reflects light upward around the LED 12. The light emitting device 10 includes a reflector support portion 13 between the substrate 11 and the reflector 14 to which the reflector 14 can be attached while avoiding the surface exposure of the substrate 11. The light emitting device 10 further includes a translucent surface cover 16 that protects the surfaces of the LEDs 12 and the reflectors 14 and controls the transmittance of emitted light, for example, as necessary.
基板１１は、ガラスエポキシや表面絶縁処理されたアルミ板材料の上にＬＥＤ１２の実装パタンと配線パタンを設けたような構成であり、ＬＥＤ１２の投入電力が大きいものでは高放熱性あるいは高熱伝導性材料で構成する。 The substrate 11 has a configuration in which a mounting pattern and a wiring pattern for the LED 12 are provided on a glass epoxy or aluminum plate material that has been surface-insulated. If the input power of the LED 12 is large, the material has high heat dissipation or high thermal conductivity. Consists of.
図１（ａ），（ｂ）は、発光装置１０の例としてライン状に複数のＬＥＤ１２を配置した線状装置の一部を示したものであるが、例えばこの発光装置１０を単数あるいは複数金属筐体に取り付け、あるいは、収納し照明器具として使用することができる。ここでは図示しないがＬＥＤ１２の自己発熱による温度上昇で発光効率の低下を招かないように、基板１１の裏面を熱伝導性シートを介して金属筐体に密着させる等の構成をとる。 FIGS. 1A and 1B show a part of a linear device in which a plurality of LEDs 12 are arranged in a line as an example of the light emitting device 10. For example, the light emitting device 10 is a single or a plurality of metals. It can be attached to a housing or housed and used as a lighting fixture. Although not shown here, the back surface of the substrate 11 is brought into close contact with the metal housing via a heat conductive sheet so that the light emission efficiency does not decrease due to a temperature rise due to self-heating of the LED 12.
ここでＬＥＤ１２は、サイドエミットと呼ばれる側方への相対的光放射量の大きいＬＥＤでありその配光特性に特徴を有するものである。図２にそのような特性を有する既存ＬＥＤ製品（市販のサイドエミットＬＥＤ）の配光特性（角度光放射分布特性）を示す。例えば図２（ａ）は、サンケン電気株式会社製のＬＥＤであるＳＥＬＴ１ＷＡ１３ＣＭについて、ＬＥＤの放射中心を０度方向（ＬＥＤの真上方向）として、それより側方の放射角度でどれくらいの割合の光が放射されているかを示したものである。また、図２（ｂ）は、Ｐｈｉｌｉｐｓ・Ｌｕｍｉｌｅｄｓ・Ｌｉｇｈｔｉｎｇ社製のＬＥＤであるＬｕｘｅｏｎ（登録商標）・Ｅｍｉｔｔｅｒについて、横軸の放射角度に対して縦軸に相対強度を示したものである。また、図２（ｃ）は、ＯＳＲＡＭ・Ｏｐｔｏ・Ｓｅｍｉｃｏｎｄｕｃｔｏｒｓ社製のＬＥＤであるＬＷ・Ｗ５ＫＭについて、図２（ａ）及び図２（ｂ）の両形式のグラフで特性を示している。図２（ａ）〜（ｃ）いずれの特性も側方放射比率が非常に大きいものである。これら例として挙げたＬＥＤは外観形状は異なるものの全て光線制御レンズを有し、レンズ界面でのフレネル透過／反射則に従って光線方向が決定され、図２のようにＬＥＤ中心方向では光の放射が抑えられ、ＬＥＤ側面方向でＬＥＤ周囲全方向に対し側方放射成分の放射量が大きくなるように設計されたものである。 Here, the LED 12 is an LED called a side emitter that has a large amount of lateral light emission, and is characterized by its light distribution characteristics. FIG. 2 shows the light distribution characteristic (angle light radiation distribution characteristic) of an existing LED product (commercially available side-emitting LED) having such characteristics. For example, Fig. 2 (a) shows the ratio of the light emitted from the Sanken Electric Co., Ltd. LED, SELT1WA13CM, with the LED emission center at the 0 degree direction (directly above the LED) and the emission angle at the side. Indicates whether or not FIG. 2B shows the relative intensity on the vertical axis with respect to the radiation angle on the horizontal axis for Luxeon (registered trademark) Emitter, which is an LED manufactured by Philips, Lumileds, and Lighting. FIG. 2C shows the characteristics of LW / W5KM, which is an LED manufactured by OSRAM / Opto / Semiconductors, in both types of graphs of FIG. 2 (a) and FIG. 2 (b). Each of the characteristics shown in FIGS. 2A to 2C has a very large lateral emission ratio. Although these LEDs have different appearance shapes, they all have a light control lens, the light direction is determined according to the Fresnel transmission / reflection law at the lens interface, and light emission is suppressed in the LED center direction as shown in FIG. Thus, the amount of radiation of the side radiation component is designed to be larger in the LED side surface direction than in all directions around the LED.
図１（ｃ）は、図１（ａ），（ｂ）の発光装置１０の１つのＬＥＤ１２の周辺部の構成を示したものであるが、上記のようなサイドエミット型のＬＥＤを用いているため、ＬＥＤ１２の中心光軸に沿って放射される光量よりも、ＬＥＤ１２の側方に放射される光量が大きい。したがって、図１（ｃ）の構成のようにＬＥＤ１２の周辺にリフレクタ１４を備えることで、ＬＥＤ１２からの放射光の大半が直接リフレクタ１４の反射面１５に入射し、その反射を受けて装置上面へ光が放射されることになる。 FIG. 1C shows the configuration of the peripheral part of one LED 12 of the light emitting device 10 of FIGS. 1A and 1B, and the side-emitting LED as described above is used. Therefore, the amount of light emitted to the side of the LED 12 is larger than the amount of light emitted along the central optical axis of the LED 12. Therefore, by providing the reflector 14 around the LED 12 as in the configuration of FIG. 1C, most of the emitted light from the LED 12 is directly incident on the reflecting surface 15 of the reflector 14 and receives the reflection to the upper surface of the apparatus. Light will be emitted.
一方、従来の発光装置では、できるだけ装置直上（発光面を上向きに置いた場合）の明るさを高めるため、ＬＥＤ中心光軸方向の放射量がＬＥＤ側方の放射量より大きい拡散面発光型ＬＥＤや、それより照射角度を狭めたような砲弾型ＬＥＤを用いることが多かった。そのため、結果として特に装置直上の明るさが強く、かなり不快な眩しさ（グレア）が感じられる場合が少なくなかった。そのような従来装置の配光特性と本実施の形態の発光装置１０の配光特性とを比較した例を示したのが図３である。図の見方は通常の光源ランプの標準配光データと同じであるが、横軸方向が水平方向（装置設置面方向）で縦軸方向が発光装置１０の発光中心軸方向である。Ｌ１が従来装置の狭配光ＬＥＤや拡散配光ＬＥＤとリフレクタで得られる配光曲線、Ｌ２、Ｌ３が図１（ｃ）のリフレクタ１４の形状条件等により得られる２つの配光曲線例であるが、その相対形状としてはＬ１に比較して特に中心方向の強度を低く抑え、その分中心より側方への発光量を増やすような形とすることができる。例えばＬ２の配光では、光軸方向の光度が相対的に低く抑えられており、水平方向から角度θの方向に光度のピークがあるため、この方向の光を効率よく反射できるようにリフレクタ１４の反射面１５を設計することで、不快グレアの発生を抑えつつ、発光効率を高めることができる。また、例えばＬ３のような配光では、直上を中心とする広い照明領域で照度むらの少ない照明を得ることができる。 On the other hand, in the conventional light-emitting device, in order to increase the brightness directly above the device (when the light-emitting surface is placed upward) as much as possible, the diffusion surface-emitting LED whose radiation amount in the LED central optical axis direction is larger than the radiation amount on the side of the LED In addition, a bullet-type LED whose irradiation angle is narrower than that is often used. Therefore, as a result, the brightness directly above the apparatus is particularly strong, and it is often the case that a very unpleasant glare (glare) is felt. FIG. 3 shows an example in which such a light distribution characteristic of the conventional device is compared with the light distribution characteristic of the light emitting device 10 of the present embodiment. The view is the same as the standard light distribution data of a normal light source lamp, but the horizontal axis direction is the horizontal direction (device installation surface direction), and the vertical axis direction is the light emission central axis direction of the light emitting device 10. L1 is a light distribution curve obtained by the narrow light distribution LED or the diffuse light distribution LED and the reflector of the conventional device, and L2 and L3 are two light distribution curve examples obtained by the shape conditions of the reflector 14 in FIG. However, the relative shape can be set such that the intensity in the center direction is particularly low compared to L1, and the amount of light emitted from the center to the side is increased accordingly. For example, in the light distribution of L2, the light intensity in the optical axis direction is relatively low, and there is a light intensity peak in the direction of the angle θ from the horizontal direction, so that the reflector 14 can reflect light in this direction efficiently. By designing the reflective surface 15, it is possible to increase the light emission efficiency while suppressing the occurrence of unpleasant glare. For example, in the light distribution such as L3, it is possible to obtain illumination with little illuminance unevenness in a wide illumination region centering directly above.
このように、本実施の形態では、従来装置よりも装置中心軸方向の明るさを抑える効果があり、例えば照明装置として用いる場合には、装置中心方向を見込んだ場合の眩しさを低減する効果がある。一方でＬＥＤ１２から多く放たれる側方への光は、大半をリフレクタ１４に照射させることができるため、それを効率よく反射的に発光光として活用することができ、発光効率の良好な装置を提供することができる。またリフレクタ１４の反射面１５の鏡面性、拡散性を問わずリフレクタ１４の開口部１７の面積を広くしていくことで、不快グレアを抑えた状態で照明領域を広げることができる。 As described above, the present embodiment has an effect of suppressing the brightness in the direction of the center of the apparatus as compared with the conventional apparatus. For example, when used as a lighting apparatus, the effect of reducing glare when the direction of the center of the apparatus is expected. There is. On the other hand, most of the side light emitted from the LED 12 can be applied to the reflector 14, so that it can be efficiently reflected and used as emitted light, and a device with good emission efficiency can be obtained. Can be provided. Further, by increasing the area of the opening 17 of the reflector 14 regardless of the specularity and diffusivity of the reflecting surface 15 of the reflector 14, the illumination area can be expanded while suppressing unpleasant glare.
上記のように、本実施の形態において、発光装置１０は、光を照射するＬＥＤ１２と、ＬＥＤ１２の光軸方向に開口部１７が設けられた筒状のリフレクタ１４とを備える。ＬＥＤ１２は、光軸から所定の角度（例えば、図３のＬ２の配光特性を持つのであれば、９０°−θ）傾いた方向である非軸方向の光度が光軸方向の光度より大きいタイプのものである。リフレクタ１４は、少なくともＬＥＤ１２からＬＥＤ１２の非軸方向に照射される光を反射面１５（内側面）で反射して開口部１７から出射する。これにより、不快グレアの発生を抑えつつ、装置の光利用効率や発光効率を高めることができる。本実施の形態では、発光装置１０が、ＬＥＤ１２ごとにリフレクタ１４を備え、しかもリフレクタ１４の底部の開口形状及びサイズをＬＥＤ１２の外周形状及びサイズと略同じ（ＬＥＤ１２の外周よりはやや大きいことが望ましい）としているため、装置の光利用効率や発光効率がより一層高まる。 As mentioned above, in this Embodiment, the light-emitting device 10 is provided with LED12 which irradiates light, and the cylindrical reflector 14 in which the opening part 17 was provided in the optical axis direction of LED12. The LED 12 is a type in which the light intensity in the non-axis direction, which is a direction inclined from the optical axis by a predetermined angle (for example, 90 ° −θ if the light distribution characteristic of L2 in FIG. 3) is larger than the light intensity in the optical axis direction. belongs to. The reflector 14 reflects light emitted from at least the LED 12 in the non-axis direction of the LED 12 by the reflecting surface 15 (inner surface) and emits the light from the opening 17. Thereby, it is possible to increase the light use efficiency and the light emission efficiency of the apparatus while suppressing the occurrence of unpleasant glare. In the present embodiment, the light emitting device 10 includes a reflector 14 for each LED 12, and the opening shape and size of the bottom portion of the reflector 14 are substantially the same as the outer peripheral shape and size of the LED 12 (desirably slightly larger than the outer periphery of the LED 12). Therefore, the light utilization efficiency and the light emission efficiency of the device are further increased.
本実施の形態において、発光装置１０は、基板１１上にリフレクタ支持部１３を配置し、さらにその上部にリフレクタ１４を取り付け可能な構成としている。ここでリフレクタ１４を着脱可能な構成とすることもできる。予め様々な形態や表面状態のリフレクタ１４を用意しておくことで、発光装置１０を用いる空間の照明ニーズ（照度分布）に応じ、ビーム角（配光角）を調整することが可能であり、低グレアで照明領域あるいは配光特性が可変な照明装置を提供することができる。例えば、リフレクタ１４の反射面１５は必要な配光特性に依存するが、反射面１５を鏡面又は拡散率の高い面とし、形状としては平坦面、放物面（パラボラ）等の湾曲面等で形成する。また、リフレクタ１４の開口径の大きさ（開口部１７の幅）で照明領域を調整することも可能である。さらに図１の例ではリフレクタ１４の形状を円錐（反射面１５を円錐面）としているが、表面開口形状（開口部１７の形状）を正方形あるいは長方形とし、その基板１１側に向かう反射面１５の形状が湾曲面あるいは平面（角錐面）で構成されるような形であっても構わない。即ち、リフレクタ１４の反射面１５は、例えば、角錐面、円錐面、あるいは、放物面をなす。また後述するようにリフレクタ１４を着脱可能な構成とすることで、予め色変換機能を有するリフレクタ１４を装着することで、元々のＬＥＤ１２の光色をユーザニーズにより他の色に変更することもできる。また、図１の例では個々のＬＥＤ１２の周囲を囲むようなリフレクタ１４の構成を採用しているが、複数のＬＥＤ１２を囲むようなリフレクタ１４の構成を採用しても構わない。 In the present embodiment, the light emitting device 10 is configured such that the reflector support portion 13 is disposed on the substrate 11 and the reflector 14 can be attached to the upper portion thereof. Here, the reflector 14 may be configured to be detachable. By preparing the reflectors 14 in various forms and surface states in advance, it is possible to adjust the beam angle (light distribution angle) according to the lighting needs (illuminance distribution) of the space where the light emitting device 10 is used, It is possible to provide an illumination device with low glare and variable illumination area or light distribution characteristics. For example, although the reflecting surface 15 of the reflector 14 depends on the required light distribution characteristics, the reflecting surface 15 is a mirror surface or a surface having a high diffusivity, and the shape is a flat surface, a curved surface such as a parabola, or the like. Form. It is also possible to adjust the illumination area by the size of the opening diameter of the reflector 14 (width of the opening 17). Further, in the example of FIG. 1, the shape of the reflector 14 is a cone (the reflecting surface 15 is a conical surface), but the surface opening shape (the shape of the opening 17) is a square or a rectangle, and the reflecting surface 15 toward the substrate 11 is formed. The shape may be a curved surface or a flat surface (pyramidal surface). That is, the reflecting surface 15 of the reflector 14 forms, for example, a pyramid surface, a conical surface, or a paraboloid. Further, as will be described later, the reflector 14 is configured to be detachable so that the light color of the original LED 12 can be changed to another color according to user needs by mounting the reflector 14 having a color conversion function in advance. . In the example of FIG. 1, the configuration of the reflector 14 that surrounds the individual LEDs 12 is employed, but the configuration of the reflector 14 that surrounds the plurality of LEDs 12 may be employed.
本実施の形態において、発光装置１０は、例えばオフィス天井に設置するグリッド、スクエア、ベース、ライン照明器具、あるいは、ダウンライト器具等の筐体に組み込み低グレア照明装置として利用することができる。具体的な活用例としては、一般照明や演出照明等の照明器具のほか、美術館や医療用等の特殊照明、また、ショーケースや冷蔵庫等の機器の組み込み照明装置、広告灯等の背面照明装置といったものがある。このとき、照明装置は、発光装置１０のＬＥＤ１２を点灯させる電源装置を備えるものとする。 In the present embodiment, the light emitting device 10 can be used as a low-glare lighting device incorporated in a housing such as a grid, square, base, line lighting fixture, or downlight fixture installed on an office ceiling, for example. Specific examples of use include lighting such as general lighting and production lighting, special lighting for museums and medical use, etc., lighting equipment built in equipment such as showcases and refrigerators, and back lighting equipment such as advertising lights. There is something like this. At this time, the illumination device includes a power supply device that turns on the LED 12 of the light emitting device 10.
なお、図１中、発光装置１０はライン状にＬＥＤ１２を配置した線状照明装置であるが、本実施の形態はその配列に限ったものではなくＬＥＤ１２が円環状等に配置されるような構成でも構わない。 In FIG. 1, the light emitting device 10 is a linear illumination device in which the LEDs 12 are arranged in a line. However, the present embodiment is not limited to the arrangement, and the LED 12 is arranged in an annular shape or the like. It doesn't matter.
以上説明したように、本実施の形態では、発光装置１０が、単数又は複数のサイドエミット放射機能を有するＬＥＤ１２（ＬＥＤパッケージ）を実装した基板１１と、その基板１１上の個々のＬＥＤ１２の周囲を囲むリフレクタ１４とを備える。これにより、サイドエミット型のＬＥＤ１２の光軸方向の光を抑えるとともにリフレクタ１４の照射効率を高めることができ、その結果、光源を見込んだ際の不快グレア（眩しさ）を抑制するとともに、広い空間を効率よく照らすことができる。 As described above, in the present embodiment, the light-emitting device 10 includes the substrate 11 on which the LED 12 (LED package) having one or a plurality of side emission functions is mounted, and the periphery of the individual LEDs 12 on the substrate 11. And an enclosing reflector 14. As a result, the light in the optical axis direction of the side-emitting LED 12 can be suppressed and the irradiation efficiency of the reflector 14 can be increased. As a result, unpleasant glare (dazzling) when looking at the light source is suppressed, and a wide space is provided. Can be illuminated efficiently.
図４は、本実施の形態の変形例に係る発光装置１０の構成例を示す図である。図４（ａ）〜（ｃ）は、いずれも図１（ｃ）に対応する発光装置１０の側断面図である。 FIG. 4 is a diagram illustrating a configuration example of the light emitting device 10 according to a modification of the present embodiment. 4A to 4C are side sectional views of the light emitting device 10 corresponding to FIG. 1C.
図４（ａ）の構成は、ＬＥＤ１２の表面上で、かつ、それが有するＬＥＤチップの光軸上の位置に半透光性、又は、少なくともＬＥＤ１２の発光面に対向する側が高反射性を有する光制御部材１８を配置したものである。それはＬＥＤ１２の上面にそのような光材料を塗布する、あるいは、光制御シート部材を貼り付けたり、取り付けたりする等して実現することができる。そのような光制御部材１８を設けることでＬＥＤ１２の発光中心軸方向の光をさらに低減させつつ、例えば高反射性部材とした場合には、一度ＬＥＤ１２内に光を戻しその一部はＬＥＤ１２の側面方向から放射されるため、ＬＥＤ１２からの側方放射量を高めることができる。その結果、発光装置１０を見込んだ際、ＬＥＤ１２の中心付近から直接発せられる光の強度を抑えることができ、ＬＥＤ１２の配置箇所を見た際の不快グレアを低減することが可能である。さらに側方放射された光のほとんどはリフレクタ１４の表面（反射面１５）を照射し、リフレクタ１４の反射面１５で効率よく反射されるため、不快グレアを低減する効果を持ちながら発光効率のよい発光装置１０を提供することができる。 4A is semi-transparent on the surface of the LED 12 and on the optical axis of the LED chip it has, or at least the side facing the light emitting surface of the LED 12 is highly reflective. The light control member 18 is disposed. It can be realized by applying such a light material on the upper surface of the LED 12, or attaching or attaching a light control sheet member. By providing such a light control member 18, the light in the direction of the light emission center axis of the LED 12 is further reduced. For example, when a highly reflective member is used, the light is once returned into the LED 12, and part of the side surface of the LED 12. Since it is radiated | emitted from a direction, the side radiation | emission amount from LED12 can be raised. As a result, when the light emitting device 10 is viewed, the intensity of light directly emitted from the vicinity of the center of the LED 12 can be suppressed, and unpleasant glare when the LED 12 is disposed can be reduced. Further, most of the light emitted from the side illuminates the surface (reflecting surface 15) of the reflector 14 and is efficiently reflected by the reflecting surface 15 of the reflector 14. Therefore, the luminous efficiency is good while reducing the discomfort glare. The light emitting device 10 can be provided.
上記のように、図４（ａ）の例において、発光装置１０は、ＬＥＤ１２の表面のうち、ＬＥＤ１２の光軸方向に位置する特定の領域を覆う光制御部材１８を備える。光制御部材１８は、ＬＥＤ１２からＬＥＤ１２の光軸方向に照射される光の少なくとも一部を遮る（例えば、一部又は全部の光を反射又は吸収し、残りがあれば残りの光のみを透過する）。これにより、不快グレアの発生をより確実に抑えることができる。 As described above, in the example of FIG. 4A, the light emitting device 10 includes the light control member 18 that covers a specific region located in the optical axis direction of the LED 12 in the surface of the LED 12. The light control member 18 blocks at least a part of the light emitted from the LED 12 in the optical axis direction of the LED 12 (for example, reflects or absorbs a part or all of the light, and transmits only the remaining light if there is a remainder. ). Thereby, generation | occurrence | production of discomfort glare can be suppressed more reliably.
図４（ｂ）の構成は、図１の構成の表面カバー１６の裏面（ＬＥＤ１２側の面）に、個々のＬＥＤ１２の発光中心軸上の位置に合わせ、ＬＥＤ１２側に向かい光を鏡面反射する、あるいは、光を乱反射する機能を有し、半透過性又は非透光性を持つ光制御部材１８を設けたものである。それは反射パタン（ドット）の印刷、反射材（反射塗料）の塗布、高反射シールの貼り付け、表面カバー１６の裏面のブラスト処理、又は、凹凸加工により実現することができる。そのような光制御部材１８を設けることでＬＥＤ１２の発光中心軸方向の光をさらに低減させることができ、その結果、発光装置１０を見込んだ際、ＬＥＤ１２の中心付近から直接発せられる光の強度を抑えることができ、ＬＥＤ１２の配置箇所を見た際の不快グレアを低減することが可能である。 The configuration of FIG. 4B matches the position on the light emission center axis of each LED 12 on the back surface (surface on the LED 12 side) of the front cover 16 of the configuration of FIG. 1, and specularly reflects light toward the LED 12 side. Alternatively, a light control member 18 having a function of irregularly reflecting light and having translucency or non-translucency is provided. This can be realized by printing a reflection pattern (dot), applying a reflection material (reflection coating), applying a high reflection seal, blasting the back surface of the front cover 16, or uneven processing. By providing such a light control member 18, the light in the direction of the light emission center axis of the LED 12 can be further reduced. As a result, when the light emitting device 10 is viewed, the intensity of light emitted directly from the vicinity of the center of the LED 12 is increased. Therefore, it is possible to reduce unpleasant glare when the LED 12 is disposed.
上記のように、図４（ｂ）の例において、発光装置１０は、光を透過する表面カバー１６（カバーの一例）を備える。表面カバー１６は、リフレクタ１４の開口部１７を覆っている。表面カバー１６において、ＬＥＤ１２の光軸方向に位置する所定の領域には、ＬＥＤ１２からＬＥＤ１２の光軸方向に照射される光の少なくとも一部を遮る（例えば、ＬＥＤ１２に近い側の面が一部又は全部の光を反射又は吸収し、残りがあれば残りの光のみを透過する）光制御部材１８が設けられている。そのため、上記所定の領域の透光率は、上記所定の領域以外の領域の透光率より低くなっている。これにより、不快グレアの発生をより確実に抑えることができる。なお、光制御部材１８を設けるのではなく、例えば、上記所定の領域とそれ以外の領域とで表面カバー１６の構成を変えることにより、上記所定の領域の透光率がそれ以外の領域の透光率より低くなるようにしてもよい。 As described above, in the example of FIG. 4B, the light emitting device 10 includes the surface cover 16 (an example of a cover) that transmits light. The front cover 16 covers the opening 17 of the reflector 14. In the surface cover 16, a predetermined region located in the optical axis direction of the LED 12 blocks at least a part of light emitted from the LED 12 in the optical axis direction of the LED 12 (for example, a surface near the LED 12 is partially or A light control member 18 is provided that reflects or absorbs all light and transmits only the remaining light if there is any). Therefore, the light transmittance of the predetermined region is lower than the light transmittance of regions other than the predetermined region. Thereby, generation | occurrence | production of discomfort glare can be suppressed more reliably. Instead of providing the light control member 18, for example, by changing the configuration of the surface cover 16 between the predetermined region and the other region, the light transmittance of the predetermined region is changed to that of the other region. You may make it become lower than a light rate.
図４（ｃ）の構成は、図１の構成の表面カバー１６の裏面（ＬＥＤ１２側の面）に、ＬＥＤ１２の光軸上に中心が位置する逆円錐状の光制御部材１８を設けたものである。ここでの光制御部材１８は例えば鏡面、拡散性を問わず表面が高反射性を持つものであれば、ＬＥＤ１２から中心方向に放射された光を表面反射により、リフレクタ１４の反射面１５の方向等に一旦反射することができるため、ＬＥＤ１２の光軸方向へ直接放射される光の光度を低く抑えることが可能である。光制御部材１８は、表面カバー１６と一体成形されていてもよいし、表面カバー１６とは別部品として用意したものでもよい。例えば光制御部材１８は表面カバー１６を表面加工（磨き、めっき、塗装、反射材料貼り付け）等して実現することができる。またそれとは別に、光制御部材１８は表面を平坦に磨いた透明樹脂材料でも構わず、その場合にはスネルの法則により光の進行方向が決まるが、図４（ｃ）で示した光線のようにＬＥＤ１２の中心方向から光制御部材１８に浅い角度で進んだ光は、その斜面で反射され、表面カバー１６やリフレクタ１４の反射面１５の方向に制御される。 In the configuration of FIG. 4C, an inverted conical light control member 18 centered on the optical axis of the LED 12 is provided on the back surface (surface on the LED 12 side) of the front cover 16 of the configuration of FIG. is there. For example, if the light control member 18 has a highly reflective surface regardless of specular or diffusive properties, the light emitted from the LED 12 in the central direction is reflected by the surface to the direction of the reflecting surface 15 of the reflector 14. Therefore, the luminous intensity of the light directly emitted in the optical axis direction of the LED 12 can be kept low. The light control member 18 may be integrally formed with the front cover 16 or may be prepared as a separate part from the front cover 16. For example, the light control member 18 can be realized by subjecting the surface cover 16 to surface processing (polishing, plating, painting, applying a reflective material) or the like. Alternatively, the light control member 18 may be a transparent resin material whose surface is polished flat. In this case, the light traveling direction is determined by Snell's law, but the light beam shown in FIG. In addition, the light traveling at a shallow angle from the center direction of the LED 12 to the light control member 18 is reflected by the inclined surface, and is controlled in the direction of the surface cover 16 and the reflecting surface 15 of the reflector 14.
上記のように、図４（ｃ）の例において、発光装置１０は、図４（ｂ）の例と同様に、表面カバー１６（カバーの一例）を備える。この例では、表面カバー１６の所定の領域に、円錐状の光制御部材１８が設けられている。即ち、上記所定の領域は、頂点がＬＥＤ１２側を向く円錐状に形成され、円錐面が光を反射する。これにより、不快グレアの発生をより確実に抑えることができる。 As described above, in the example of FIG. 4C, the light-emitting device 10 includes the front cover 16 (an example of a cover) as in the example of FIG. 4B. In this example, a conical light control member 18 is provided in a predetermined region of the front cover 16. That is, the predetermined area is formed in a conical shape with the apex facing the LED 12 side, and the conical surface reflects light. Thereby, generation | occurrence | production of discomfort glare can be suppressed more reliably.
以上のように、本実施の形態の変形例では、ＬＥＤ１２から光軸方向に照射される光を光制御部材１８により、光軸より外側方向に制御することができ、その結果、光源中心を見込んだ際のグレアを低減させることができる。 As described above, in the modification of the present embodiment, the light irradiated from the LED 12 in the optical axis direction can be controlled outward from the optical axis by the light control member 18, and as a result, the light source center is expected. It is possible to reduce glare at the time.
実施の形態２．
本実施の形態について、主に実施の形態１との差異を説明する。
Embodiment 2. FIG.
In the present embodiment, differences from the first embodiment will be mainly described.
図５は、本実施の形態に係る発光装置１０の一構成例を示す図である。図５は、図１（ｃ）に対応する発光装置１０の側断面図である。 FIG. 5 is a diagram illustrating a configuration example of the light emitting device 10 according to the present embodiment. FIG. 5 is a side sectional view of the light emitting device 10 corresponding to FIG.
実施の形態１では、１つのリフレクタ１４に対してＬＥＤ１２を１個のみ用いた構成を採用していたが、面積が小さい基板１１で大光束が必要となる場合等には、図５に示すように１つのリフレクタ１４に対してＬＥＤ１２が複数個配置される構成としても構わない。なお、図５は、図４（ａ）の構成を応用したものであるが、図１（ｃ）や図４（ｂ），（ｃ）の構成、あるいは、後述する実施の形態の構成を応用してもよい。いずれの場合も、光制御部材１８や後述する色変換部材は、１つのリフレクタ１４に対してＬＥＤ１２を１個のみ用いた場合と同様に構成すればよい。 In the first embodiment, a configuration in which only one LED 12 is used for one reflector 14 is adopted. However, when a large luminous flux is required on the substrate 11 having a small area, as shown in FIG. Alternatively, a plurality of LEDs 12 may be arranged with respect to one reflector 14. Note that FIG. 5 is an application of the configuration of FIG. 4A. However, the configuration of FIG. 1C, FIG. 4B, and FIG. May be. In any case, the light control member 18 and the color conversion member described later may be configured in the same manner as in the case where only one LED 12 is used for one reflector 14.
実施の形態３．
本実施の形態について、主に実施の形態１との差異を説明する。
Embodiment 3 FIG.
In the present embodiment, differences from the first embodiment will be mainly described.
図６（ａ）は、本実施の形態に係る発光装置１０の一構成例を示す図である。図６（ａ）は、図１（ｃ）に対応する発光装置１０の側断面図である。 FIG. 6A is a diagram illustrating a configuration example of the light emitting device 10 according to the present embodiment. FIG. 6A is a side sectional view of the light emitting device 10 corresponding to FIG.
実施の形態１のような不快グレアの少ない柔らかい光を発する発光装置１０では、ＬＥＤ１２の発光色が電気的に調整不可能な場合、基板１１を、その光色変更を目的に異なる光色のＬＥＤ１２を実装した基板１１と交換するのは電気工事も必要となり非常に手間を要する。一方、本実施の形態では、以下に述べる特徴的な色変換部材２０を用いた構成により比較的容易に所望の発光色に変更することができる。 In the light emitting device 10 that emits soft light with less unpleasant glare as in the first embodiment, when the emission color of the LED 12 cannot be electrically adjusted, the substrate 11 is changed to the LED 12 having a different light color for the purpose of changing the light color. Replacing the circuit board 11 with the substrate 11 requires electrical work and is very laborious. On the other hand, in the present embodiment, it is possible to change to a desired light emission color relatively easily by the configuration using the characteristic color conversion member 20 described below.
本実施の形態では、リフレクタ１４の高い反射率を有する反射面１５の上に色変換部材２０を具備した構成としている。色変換部材２０は例えばサイドエミット型のＬＥＤ１２の光に励起発光する蛍光体を樹脂バインダに分散させたような材料をリフレクタ１４の反射面１５に塗布したり、蛍光体混合材料を用意しておき反射面１５に貼り付けたりする等により構成する。例えばＬＥＤ１２がＪＩＳ（日本工業規格）の昼光色や昼白色であり（図中実線の光線）、それを低色温度の白色、温白色、電球色等に変換したい場合（図中の点線の光線）には、例えば窒化物赤色蛍光体等をシリコーン材料等に混合した材料で色変換部材２０を構成する。また光色の調整はさらに例えばシリケート等の緑色蛍光体や橙色蛍光体等を混合させることで行うとよい。シリコーンはＬＥＤ１２の封止材料にも用いられる材料であり、透明性があり耐光性や耐熱性に優れ柔軟性がある材料である。一方、青色に発光するＬＥＤ１２を用いるような場合に、略白色を得たい場合には、例えば黄色発光シリケート蛍光体やＹＡＧ蛍光体材料といった黄色蛍光体が含まれる色変換材料で色変換部材２０を構成すればよい。このように、ＬＥＤ１２が照射する光の色は、ＪＩＳ照明色のうち、昼光色、昼白色、白色、温白色、電球色のいずれであってもよいし、青色等、他の色であってもよい。 In the present embodiment, the color conversion member 20 is provided on the reflection surface 15 having a high reflectance of the reflector 14. As the color conversion member 20, for example, a material in which a phosphor that is excited and emitted by the light of the side-emitting LED 12 is dispersed in a resin binder is applied to the reflecting surface 15 of the reflector 14, or a phosphor mixed material is prepared. It is configured by pasting on the reflection surface 15 or the like. For example, when the LED 12 is JIS (Japanese Industrial Standard) daylight color or day white color (solid line light in the figure), and it is desired to convert it to white, warm white, light bulb color, etc. with low color temperature (light line with dotted line in the figure) For example, the color conversion member 20 is made of a material obtained by mixing a nitride red phosphor or the like with a silicone material or the like. The light color may be adjusted by mixing a green phosphor such as silicate or an orange phosphor. Silicone is a material that is also used as a sealing material for the LED 12, and is a material that is transparent, excellent in light resistance and heat resistance, and flexible. On the other hand, in the case of using the LED 12 that emits blue light, if it is desired to obtain a substantially white color, the color conversion member 20 is made of a color conversion material containing a yellow phosphor such as a yellow light emitting silicate phosphor or a YAG phosphor material. What is necessary is just to comprise. Thus, the color of the light emitted by the LED 12 may be any of daylight color, day white color, white color, warm white color, light bulb color, and other colors such as blue color among JIS illumination colors. Good.
以上のように、本実施の形態では、ＬＥＤ１２の側面方向の放射成分が強いため、それが照射されるリフレクタ１４の反射面１５に色変換部材２０を配置することで効率よく任意の光色に色変換できる。なお色変換材料をシート材料等として予め用意する場合は、例えば高反射フィルム材料の上に蛍光体混合材料を形成したものを作製しておき、それを装着するようにすれば、蛍光体混合材料中での光の利用効率を高めることができ、蛍光体の波長変換効率と、非光色変換光及び光色変換光の反射効率を高めることができ発光効率の高い発光装置１０を提供することができる。 As described above, in the present embodiment, since the radiation component in the side surface direction of the LED 12 is strong, the color conversion member 20 is arranged on the reflection surface 15 of the reflector 14 to which the LED 12 is irradiated to efficiently change the light color to an arbitrary light color. Color conversion is possible. If the color conversion material is prepared in advance as a sheet material or the like, for example, if a phosphor mixed material formed on a highly reflective film material is prepared and then mounted, the phosphor mixed material It is possible to increase the light use efficiency in the light source, to improve the wavelength conversion efficiency of the phosphor, the reflection efficiency of the non-light color conversion light and the light color conversion light, and to provide the light emitting device 10 with high light emission efficiency. Can do.
光色がＪＩＳ照明４色（色温度が高いものから昼光色、昼白色、白色、温白色）の領域のＬＥＤ１２を用いることで、非色変換時にはある照明色で利用し、変換時には色変換部材２０の調整により上記のそれぞれの色より低色温度の昼白色〜電球色のＪＩＳ照明色で発光する発光装置１０を提供することができる。したがって、発光装置１０は使用するシーンに合わせて色変換部材２０の使用／不使用を選択し、また使用する場合には色変換部材２０の種類を選定して（蛍光体種類や混合量を調整して）、所望の照明用光色にて一般照明として使用することができる。 By using the LED 12 in the region where the light color is four colors of JIS lighting (from the color temperature high to daylight color, day white color, white color, warm white color), it is used in a certain illumination color at the time of non-color conversion, and the color conversion member 20 at the time of conversion. By adjusting the above, it is possible to provide the light emitting device 10 that emits light with a JIS illumination color of daylight white to light bulb color having a lower color temperature than each of the above colors. Therefore, the light emitting device 10 selects use / non-use of the color conversion member 20 according to the scene to be used, and if used, selects the type of the color conversion member 20 (adjusts phosphor type and mixing amount). And can be used as general illumination with a desired illumination light color.
例えば図６（ａ）の構成を採用し、昼白色のＬＥＤ１２を用いた発光装置１０において、色変換部材２０を装着（適用）する前の発光スペクトルと、色変換部材２０を装着して色変換（波長変換）を行った後の発光スペクトルとを図７に示す。この例において、色変換部材２０は６５５ｎｍ（ナノメートル）付近にピークを持つ窒化物赤色蛍光体（ＣａＡｌＳｉＮ３；Ｅｕ）を適量混合した材料である。色変換部材２０の装着前は、色温度が約５０００Ｋ（ケルビン）であり、即ち、発光色が昼白色である。一方、色変換部材２０の装着後は、色温度が約４０００Ｋに変化しており、即ち、発光色が白色に変換されている。 For example, in the light emitting device 10 that employs the configuration of FIG. 6A and uses the daylight white LED 12, the emission spectrum before the color conversion member 20 is mounted (applied), and the color conversion by mounting the color conversion member 20 and color conversion. The emission spectrum after performing (wavelength conversion) is shown in FIG. In this example, the color conversion member 20 is a material in which an appropriate amount of a nitride red phosphor (CaAlSiN 3 ; Eu) having a peak near 655 nm (nanometer) is mixed. Before the color conversion member 20 is mounted, the color temperature is about 5000 K (Kelvin), that is, the emission color is neutral white. On the other hand, after the color conversion member 20 is mounted, the color temperature changes to about 4000 K, that is, the emission color is converted to white.
また、ＬＥＤ１２の光色を青色とする場合には、青色光に励起しそれと異なる色の光を発する蛍光体が多種存在するため、色変換部材２０の調整により上記ＪＩＳ照明４色を用いる場合よりも幅広い照明色に変換することができる。例えば演出照明用として彩度の高いカラフルな照明色や、一般照明用としてＪＩＳ照明色にも変更することが可能である。 In addition, when the light color of the LED 12 is blue, there are various types of phosphors that are excited by blue light and emit light of a color different from that, so that the color conversion member 20 is adjusted to use the above four colors of JIS illumination. Can also be converted into a wide range of lighting colors. For example, it is possible to change to a colorful illumination color with high saturation for production illumination or a JIS illumination color for general illumination.
また、図６（ａ）の構成の発光装置１０において予めリフレクタ１４をリフレクタ支持部１３から着脱可能なように構成しておくことで、所望の色変換を行う色変換部材２０を装着したリフレクタ１４をいくつか別途作製しておき、それを選択交換することで色変換可能となる。リフレクタ１４とリフレクタ支持部１３はネジ止め、引っ掛け、凸部と凹部による嵌合止め、リフレクタ１４をリフレクタ支持部１３にスライドする等の手法で着脱可能として固定する。このとき、リフレクタ１４を取り外した際も基板１１の上の電気端子に交換作業者の指先等が触れないようにリフレクタ支持部１３の幅や高さを調整しておくことで、リフレクタ１４の交換作業のみで光の色を変えることができるだけでなく、交換作業が安全になる。したがって、本実施の形態によれば、光源光色の変更が簡単な不快グレアが少ない照明装置を得ることができる。また色変換部材２０を有しない例えば様々な形状のリフレクタ１４との交換も簡単であるため、グレア抑制の効果を保ちながら必要に応じ配光の調整も行うことができる。 Further, in the light emitting device 10 having the configuration shown in FIG. 6A, the reflector 14 is configured so as to be detachable from the reflector support portion 13 in advance, so that the reflector 14 equipped with the color conversion member 20 for performing desired color conversion is mounted. It is possible to perform color conversion by preparing several separately and selectively exchanging them. The reflector 14 and the reflector support portion 13 are fixed so as to be detachable by a method such as screwing, hooking, fitting stop by a convex portion and a concave portion, and sliding the reflector 14 to the reflector support portion 13. At this time, when the reflector 14 is removed, the width and height of the reflector support portion 13 are adjusted so that the fingertip of the replacement operator does not touch the electrical terminal on the substrate 11, so that the reflector 14 can be replaced. Not only can the color of light be changed by work alone, but also replacement work is safe. Therefore, according to the present embodiment, it is possible to obtain an illumination device that can easily change the light source light color and has less unpleasant glare. Moreover, since it is easy to replace the reflector 14 having various shapes, for example, without the color conversion member 20, it is possible to adjust the light distribution as necessary while maintaining the effect of suppressing glare.
上記のように、本実施の形態において、発光装置１０は、光の色を変換する色変換部材２０を備える。色変換部材２０は、リフレクタ１４の反射面１５の少なくとも一部（特に、ＬＥＤ１２から照射される光が直接到達する領域）を覆うようにリフレクタ１４に着脱自在に取り付けられる。色変換部材２０は、リフレクタ１４と一体であってもよい。即ち、リフレクタ１４が、反射面１５の少なくとも一部（特に、ＬＥＤ１２から照射される光が直接到達する領域）に、光の色を変換する色変換材料を含んでいてもよい。 As described above, in the present embodiment, the light emitting device 10 includes the color conversion member 20 that converts the color of light. The color conversion member 20 is detachably attached to the reflector 14 so as to cover at least a part of the reflecting surface 15 of the reflector 14 (particularly, a region where light emitted from the LED 12 directly reaches). The color conversion member 20 may be integrated with the reflector 14. That is, the reflector 14 may include a color conversion material that converts the color of light in at least a part of the reflecting surface 15 (particularly, a region where light emitted from the LED 12 directly reaches).
以上説明したように、本実施の形態では、リフレクタ１４が着脱可能であり、発光装置１０が、リフレクタ１４の反射面１５（内側面）に蛍光材料を含有する色変換部材２０を備える。ＬＥＤ１２の側面方向の放射成分が強いため、それが照射されるリフレクタ１４の反射面１５に色変換部材２を配置することで、ＬＥＤ１２の発光色を効率よく所望の光色に変換することができる。 As described above, in the present embodiment, the reflector 14 is detachable, and the light emitting device 10 includes the color conversion member 20 containing the fluorescent material on the reflection surface 15 (inner side surface) of the reflector 14. Since the radiation component in the side surface direction of the LED 12 is strong, the emission color of the LED 12 can be efficiently converted into a desired light color by arranging the color conversion member 2 on the reflection surface 15 of the reflector 14 to which the LED 12 is irradiated. .
図６（ｂ）〜（ｅ）は、本実施の形態の変形例に係る発光装置１０の構成例を示す図である。図６（ｂ），（ｄ），（ｅ）は、図６（ａ）に対応する発光装置１０の側断面図である。図６（ｃ）は、図６（ｂ），（ｄ）の構成における色変換部材２０の斜視図である。 6B to 6E are diagrams illustrating a configuration example of the light-emitting device 10 according to a modification of the present embodiment. 6B, 6D, and 6E are side sectional views of the light emitting device 10 corresponding to FIG. FIG. 6C is a perspective view of the color conversion member 20 in the configuration of FIGS. 6B and 6D.
図６（ｂ）は、色変換部材２０をリング状の部材とし、それをリフレクタ１４の内側面（反射面１５）に固定可能なように装着する構成例である。リング状の色変換部材２０の輪の厚みや形状は必要な色合いや発光効率（特性）により調整すればよい。また色変換部材２０の厚みは、リフレクタ１４の底面からリフレクタ１４の中間までの厚みとしているが、このように、ＬＥＤ１２の配光特性に合わせる形でリフレクタ１４の強く照射される領域だけに色変換材料を用いることが望ましい。図６（ａ）の構成でも同様であるが、本例のようにリフレクタ１４の照射される光の強度が大きい領域にのみ色変換部材２０を配置することで色変換材料の使用量を少なくすることができ、その結果、色変換部材２０や発光装置１０を安価にすることができる。なお、リフレクタ１４の反射面１５の全面に色変換部材２０を設けても色変換機能に大きな支障が出るわけではない。 FIG. 6B is a configuration example in which the color conversion member 20 is a ring-shaped member and is mounted so as to be fixed to the inner side surface (reflection surface 15) of the reflector 14. The thickness and shape of the ring of the ring-shaped color conversion member 20 may be adjusted according to the required color and light emission efficiency (characteristic). Further, the thickness of the color conversion member 20 is the thickness from the bottom surface of the reflector 14 to the middle of the reflector 14. In this way, the color conversion is performed only in the region where the reflector 14 is strongly irradiated so as to match the light distribution characteristics of the LED 12. It is desirable to use materials. The same applies to the configuration of FIG. 6A, but the color conversion material 20 is disposed only in a region where the intensity of light irradiated by the reflector 14 is large as in this example, thereby reducing the amount of color conversion material used. As a result, the color conversion member 20 and the light emitting device 10 can be made inexpensive. Even if the color conversion member 20 is provided on the entire reflection surface 15 of the reflector 14, the color conversion function is not seriously affected.
上記のように、例えばリフレクタ１４がリング状であれば、その寸法に合わせたリング状の色変換部材２０のみを嵌合かつ着脱可能とすることでも任意の光色への色変換を行うことができる。また、図６（ｃ）に示したようにＬＥＤ１２の放射量の少ないＬＥＤ１２の光軸付近の領域を開口部２１とするような構成を採用すれば、色変換部材２０の使用材料（特に蛍光体）を少なくすることができ、より安価な発光装置１０を提供することができる。 As described above, for example, if the reflector 14 has a ring shape, color conversion to an arbitrary light color can be performed even by fitting and detaching only the ring-shaped color conversion member 20 that matches the size. it can. Further, as shown in FIG. 6C, if a configuration in which the region near the optical axis of the LED 12 with a small amount of radiation of the LED 12 is used as the opening 21 is used, the material used for the color conversion member 20 (particularly phosphor) ) Can be reduced, and a cheaper light emitting device 10 can be provided.
図６（ｄ）は、図６（ｂ）の構成に、さらに、図４（ｃ）の構成と同様の光制御部材１８を追加した例である。即ち、本例では、図６（ｂ）の構成の表面カバー１６の裏面（ＬＥＤ１２側の面）に、ＬＥＤ１２の光軸上に中心が位置する逆円錐状の光制御部材１８が設けられている。 FIG. 6D is an example in which a light control member 18 similar to the configuration of FIG. 4C is further added to the configuration of FIG. That is, in this example, an inverted conical light control member 18 whose center is located on the optical axis of the LED 12 is provided on the back surface (surface on the LED 12 side) of the front cover 16 having the configuration shown in FIG. .
図６（ｅ）は、表面カバー１６の裏面に、図４（ｃ）の構成と同様の光制御部材１８を設けるとともに、表面カバー１６の裏面の光制御部材１８を除く領域に色変換部材２０を設けた構成例である。この場合は、色変換部材２０や光制御部材１８が装着され、あるいは、一体となった表面カバー１６を予め用意しておくことで、表面カバー１６のみを着脱させて簡単に所望の光色に変換できる低グレアの発光装置１０を提供することができる。 6E, a light control member 18 similar to the configuration of FIG. 4C is provided on the back surface of the front cover 16, and the color conversion member 20 is provided in a region excluding the light control member 18 on the back surface of the front cover 16. It is the structural example which provided. In this case, the color conversion member 20 and the light control member 18 are attached, or the integrated surface cover 16 is prepared in advance, so that only the surface cover 16 can be attached and detached to easily obtain a desired light color. A low-glare light-emitting device 10 that can be converted can be provided.
実施の形態４．
本実施の形態について、主に実施の形態３との差異を説明する。
Embodiment 4 FIG.
The difference between the present embodiment and the third embodiment will be mainly described.
図８は、本実施の形態に係る発光装置１０の一構成例を示す図である。図８（ａ）は、図６（ａ）に対応する発光装置１０の側断面図である。図８（ｂ）は、ＬＥＤ１２及び色変換部材２０の斜視図である。 FIG. 8 is a diagram illustrating a configuration example of the light emitting device 10 according to the present embodiment. FIG. 8A is a side sectional view of the light emitting device 10 corresponding to FIG. FIG. 8B is a perspective view of the LED 12 and the color conversion member 20.
ここでは色変換部材２０をシート部材とし、リフレクタ１４を上部１４ａと下部１４ｂとに２分割してその間に色変換部材２０を配置した構成を採用している。ここではＬＥＤ１２の発光面位置にシート状の色変換部材２０を配置した例を示している。このような配置によってもやはりシート状の色変換部材２０に入射する光があるため色変換が可能になる。図８（ｂ）は、そのようなシート状の色変換部材２０の構成例を示しており、例えばＬＥＤ１２の上方の放射量が側方放射量に比較し低いため、シート中心部２２の蛍光体混合比は周囲（色変換部材２０のシート中心部２２以外の部分）に比べ低くしている。このような構成によりシート状の色変換部材２０でもある程度、変換された色の色度分布をなだらかに（色むらを少なく）することが可能である。 Here, a configuration is adopted in which the color conversion member 20 is a sheet member, and the reflector 14 is divided into an upper portion 14a and a lower portion 14b, and the color conversion member 20 is disposed therebetween. Here, the example which has arrange | positioned the sheet-like color conversion member 20 in the light emission surface position of LED12 is shown. Even with such an arrangement, since there is light incident on the sheet-like color conversion member 20, color conversion is possible. FIG. 8B shows a configuration example of such a sheet-like color conversion member 20. For example, since the amount of radiation above the LED 12 is lower than the amount of side radiation, the phosphor in the sheet center portion 22. The mixing ratio is set lower than the surroundings (portions other than the sheet center portion 22 of the color conversion member 20). With such a configuration, the chromaticity distribution of the converted color can be made gentle (less color unevenness) to some extent even in the sheet-like color conversion member 20.
上記のように、本実施の形態において、リフレクタ１４は、上部１４ａと下部１４ｂとに分割可能に構成されている。そして、リフレクタ１４の上部１４ａと下部１４ｂとの間には、光の色を変換するシート状の色変換部材２０が着脱自在に取り付けられる。このように、着脱可能な色変換部材２０をリフレクタ１４の上部１４ａと下部１４ｂとで挟み込んで使用するような構成でも容易に色変更を実現することができる。 As described above, in the present embodiment, the reflector 14 is configured to be divided into the upper part 14a and the lower part 14b. And between the upper part 14a and the lower part 14b of the reflector 14, the sheet-like color conversion member 20 which converts the color of light is attached so that attachment or detachment is possible. As described above, even when the detachable color conversion member 20 is sandwiched between the upper portion 14a and the lower portion 14b of the reflector 14, the color change can be easily realized.
また、上記のように、本実施の形態では、色変換部材２０において、ＬＥＤ１２の光軸方向に位置する特定の領域（シート中心部２２）の蛍光体含有率が当該特定の領域以外の領域の蛍光体含有率より少なくなっている。このように、ＬＥＤ１２の放射量の少ないＬＥＤ１２の光軸付近の領域では蛍光体混合比率を小さくするような構成を採用すれば、色変換部材２０の使用材料（特に蛍光体）を少なくすることができ、より安価な発光装置１０を提供することができる。 Further, as described above, in the present embodiment, in the color conversion member 20, the phosphor content of a specific region (sheet center portion 22) located in the optical axis direction of the LED 12 is a region other than the specific region. The phosphor content is less. As described above, if a configuration in which the phosphor mixing ratio is reduced in the region near the optical axis of the LED 12 where the amount of radiation of the LED 12 is small, the material (particularly phosphor) used for the color conversion member 20 may be reduced. Thus, a cheaper light emitting device 10 can be provided.
以上、本発明の実施の形態について説明したが、これらのうち、２つ以上の実施の形態を組み合わせて実施しても構わない。あるいは、これらのうち、１つの実施の形態を部分的に実施しても構わない。あるいは、これらのうち、２つ以上の実施の形態を部分的に組み合わせて実施しても構わない。 As mentioned above, although embodiment of this invention was described, you may implement combining 2 or more embodiment among these. Alternatively, one of these embodiments may be partially implemented. Or you may implement combining two or more embodiment among these partially.
１０ 発光装置、１１ 基板、１２ ＬＥＤ、１３ リフレクタ支持部、１４ リフレクタ、１４ａ 上部、１４ｂ 下部、１５ 反射面、１６ 表面カバー、１７ 開口部、１８ 光制御部材、２０ 色変換部材、２１ 開口部、２２ シート中心部。 DESCRIPTION OF SYMBOLS 10 Light-emitting device, 11 board | substrate, 12 LED, 13 reflector support part, 14 reflector, 14a upper part, 14b lower part, 15 reflective surface, 16 surface cover, 17 opening part, 18 light control member, 20 color conversion member, 21 opening part, 22 Sheet center.
Claims (15)
上部と下部とに分割可能に構成され、前記ＬＥＤの光軸方向に開口部が設けられた筒状のリフレクタであって、少なくとも前記ＬＥＤから前記ＬＥＤの非軸方向に照射される光を内側面で反射して当該開口部から出射するリフレクタと、
光の色を変換するシート状の色変換部材であって、前記リフレクタの上部と下部との間に着脱自在に取り付けられる色変換部材と
を備えることを特徴とする発光装置。 An LED (light emitting diode) that irradiates light, the LED having a non-axis direction light intensity that is inclined at a predetermined angle from the optical axis, and a light intensity greater than the light intensity in the optical axis direction;
A cylindrical reflector configured to be split into an upper part and a lower part and provided with an opening in the optical axis direction of the LED, and at least the light irradiated from the LED in the non-axis direction of the LED A reflector that reflects at and exits from the opening;
A light emitting device comprising: a sheet-like color conversion member that converts a color of light, and a color conversion member that is detachably attached between an upper portion and a lower portion of the reflector.
前記ＬＥＤの光軸方向に開口部が設けられた筒状のリフレクタであって、少なくとも前記ＬＥＤから前記ＬＥＤの非軸方向に照射される光を内側面で反射して当該開口部から出射するリフレクタと、
光の色を変換する色変換部材であって、前記リフレクタの内側面の少なくとも前記ＬＥＤから照射される光が直接到達する領域を覆うように前記リフレクタの内側面に着脱自在に取り付けられる色変換部材と
を備えることを特徴とする発光装置。 An LED (light emitting diode) that irradiates light, the LED having a non-axis direction light intensity that is inclined at a predetermined angle from the optical axis, and a light intensity greater than the light intensity in the optical axis direction;
A cylindrical reflector provided with an opening in the optical axis direction of the LED, the reflector reflecting at least the light emitted from the LED in the non-axis direction of the LED on the inner surface and exiting from the opening When,
A color conversion member for converting the color of light, wherein the color conversion member is detachably attached to the inner side surface of the reflector so as to cover at least a region of the inner side surface of the reflector where light emitted from the LED directly reaches. A light emitting device comprising:
前記色変換部材は、黄色蛍光体を含むことを特徴とする請求項１から３のいずれかの発光装置。 The LED emits blue light,
The light emitting device according to claim 1, wherein the color conversion member includes a yellow phosphor.
前記発光装置のＬＥＤを点灯させる電源装置と
を備えることを特徴とする照明装置。 A light emitting device according to any one of claims 1 to 14,
An illumination device comprising: a power supply device that turns on an LED of the light emitting device.
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