JP2013101834A - Luminaire - Google Patents
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Abstract
Description
本発明は、照明装置に関するものである。 The present invention relates to a lighting device.
ＬＥＤ素子等を備えた種々の照明装置では、高効率を重視したものが知られている。このように、高効率を重視した照明装置では、装置の発光効率はよいが、演色性が低く照明装置の光が到達した物や人の肌の色の見え方が忠実でない虞がある。 Among various lighting devices provided with LED elements or the like, ones that place importance on high efficiency are known. As described above, in a lighting device that places importance on high efficiency, the light emission efficiency of the device is good, but there is a possibility that the color rendering property is low and the appearance of the color of the object or the human skin that the light of the lighting device has reached is not faithful.
そこで、高演色性を重視した照明装置として、特許文献１に開示されているように、物や人の肌の色の見え方を忠実させるべく例えば平均演色評価数Ｒａと特殊演色評価数Ｎｏ．１５（Ｒ１５）とを考慮したものがある。 Therefore, as disclosed in Patent Document 1, as an illuminating device that emphasizes high color rendering properties, for example, the average color rendering index Ra and the special color rendering index No. 15 (R15) is considered.
また、忠実に肌色が見えることに加えて、人の肌が好ましい肌色であるように見える照明装置が知られている（例えば、特許文献２，３参照）。
特許文献２の照明装置は、色偏差（黒体放射軌跡からのずれ）を表すｄｕｖをパラメータとして利用し、ｄｕｖが０以上且つ０．０１以下となる光を照射させるようになっている。
In addition to the fact that the skin color can be faithfully seen, there is known an illuminating device in which human skin appears to be a preferable skin color (see, for example, Patent Documents 2 and 3).
The illumination device of Patent Document 2 uses a duv representing a color deviation (deviation from a black body radiation locus) as a parameter, and irradiates light with a duv of 0 or more and 0.01 or less.
また、特許文献３の照明装置は、日本人女性の肌色の好ましさ指数であるＰＳをパラメータとして利用し、ＰＳが８０以上となる光を照射させるようになっている。 Further, the lighting device of Patent Document 3 uses PS, which is a skin color preference index, of Japanese women as a parameter, and irradiates light with a PS of 80 or more.
ところで、特許文献３の照明装置では、日本人女性の肌色の好ましさ指数ＰＳをパラメータとして利用することで、人の肌が好ましい肌色であるように見せている。しかしながら、ＰＳのみのパラメータだけでなく、前述のｄｕｖや色温度もパラメータに加えることで、より細かい設定が可能となり、より好ましく人の肌の色を見せることが可能となる。 By the way, in the illuminating device of patent document 3, the skin color preference index PS of a Japanese woman is used as a parameter to make it appear that human skin is a preferable skin color. However, by adding not only PS parameters but also the above-described duv and color temperature to the parameters, finer settings can be made, and the human skin color can be displayed more preferably.
しかしながら、複数のパラメータを利用することで、光色のばらつきの管理が複雑となる虞がある。
本発明は、上記課題を解決するためになされたものであって、その目的は、肌の見え方を向上させつつ、光色のばらつきの管理を容易とすることができる照明装置を提供することにある。
However, the use of a plurality of parameters may complicate the management of light color variations.
The present invention has been made to solve the above-described problems, and an object of the present invention is to provide an illuminating device capable of facilitating the management of light color variations while improving the appearance of the skin. It is in.
上記課題を解決するために、本発明の照明装置は、色温度が３０００Ｋ、ＣＩＥＬＡＢ空間上において４０≦ａ＊≦６０、かつ、２０≦ｂ＊≦３０であり、ＣＩＥＬＡＢ空間上の直線をＸ＝０．３８４５ａ＊−ｂ＊＋４．６５４４とし、直線Ｘからの法線距離ｄｘが１．８２未満となる光を照射する照光部を備えたことを特徴とする。 In order to solve the above problems, the lighting device of the present invention has a color temperature of 3000 K, 40 ≦ a * ≦ 60 and 20 ≦ b * ≦ 30 on the CIELAB space, and a straight line on the CIELAB space is represented by X = 0.3845a * −b * + 4.6544, and an illumination unit that emits light with a normal distance dx from the straight line X being less than 1.82 is provided.
また、本発明の照明装置は、色温度が３０００Ｋ〜５０００Ｋ、ＣＩＥＬＡＢ空間上において４４≦ａ＊≦５５、かつ、２１≦ｂ＊≦２７であり、ＣＩＥＬＡＢ空間上の直線をＹ＝０．４１９１ａ＊−ｂ＊＋３．８０７４とし、直線Ｙからの法線距離ｄｙが０．９３未満となる光を照射する照光部を備えたことを特徴とする。 The lighting device of the present invention has a color temperature of 3000 K to 5000 K, 44 ≦ a * ≦ 55 and 21 ≦ b * ≦ 27 on the CIELAB space, and a straight line on the CIELAB space is represented by Y = 0.4191a *. -B * + 3.8074 is provided, and an illumination unit that emits light with a normal distance dy from the straight line Y being less than 0.93 is provided.
本発明によれば、肌の見え方を向上させつつ、光色のばらつきの管理を容易とすることができる照明装置を提供することができる。 ADVANTAGE OF THE INVENTION According to this invention, the lighting apparatus which can make easy management of the dispersion | variation in light color can be provided, improving the appearance of skin.
（第１実施形態）
以下、本発明を具体化した第１実施形態を図面に従って説明する。
図１に示すように、本実施形態の照明装置１０は、光を外部に照射する照光部１１と、この照光部１１を点灯させるための点灯回路１２とを備えている。
(First embodiment)
A first embodiment of the present invention will be described below with reference to the drawings.
As shown in FIG. 1, the illuminating device 10 of this embodiment is provided with the illumination part 11 which irradiates light outside, and the lighting circuit 12 for making this illumination part 11 light.
照光部１１は、前記点灯回路１２と電気的に接続される１つのＬＥＤ素子１１ａと、このＬＥＤ素子１１ａと所定の空隙を設けた状態で覆うとともに略黄色に発光させる１つの蛍光体１１ｂとで構成されている。そして、点灯回路１２からの電力供給に基づいて、照光部１１は、略白色に点灯するようになっている。 The illumination unit 11 includes one LED element 11a that is electrically connected to the lighting circuit 12, and one phosphor 11b that covers the LED element 11a and a predetermined gap and emits substantially yellow light. It is configured. And based on the electric power supply from the lighting circuit 12, the illumination part 11 lights up substantially white.
次に、照明装置１０の照光部１１のスペクトル特性について説明する。
本発明者は、照光部１１から照射される光が人の肌の色を好ましく見せるような光とするべく、矢野正らが提唱する日本人女性の肌色の好ましさ指数ＰＳと、色偏差（黒体放射軌跡からのずれ）を表すｄｕｖと、色温度とをパラメータとして評価実験を行った。
Next, the spectral characteristics of the illumination unit 11 of the illumination device 10 will be described.
The inventor of the present invention proposes a skin color preference index PS of Japanese women advocated by Tadashi Yano and the color deviation so that the light emitted from the illuminating unit 11 makes the color of human skin look good. An evaluation experiment was performed using duv representing (deviation from the black-body radiation locus) and color temperature as parameters.
この評価実験では、図２に示すように波長を制御することで自由に照光部１１の光を実現できる装置Ａを用いて、暗室Ｂ内のモデルＭの頬Ｍ１周辺に光を照射し、モデルＭの肌色を様々に実現させ、暗室Ｂ外にいる複数の評価者ＨがモデルＭのそれぞれの肌色に対し、好ましく見えるかどうかを評価した。 In this evaluation experiment, as shown in FIG. 2, the device A that can freely realize the light of the illumination unit 11 by controlling the wavelength is used to irradiate light around the cheek M1 of the model M in the dark room B. Various skin colors of M were realized, and it was evaluated whether or not a plurality of evaluators H outside the darkroom B looked preferable for each skin color of the model M.
また、本評価実験で用いる各パラメータは次の通りに設定した。
まずＰＳは８０〜１００の範囲に設定する。これは、矢野正らが提唱するＰＳの基準値が８０であり、この基準値８０以上とすることとが望ましいためである。ちなみに、ＰＳの算出方法としては、例えば特開平１１―２５８０４７号公報に開示されているように、肌色の好ましさに関する算出評価値Ｐを求めた後に、４×５Ｐから肌色の好ましさ指数ＰＳを算出することができる。
Each parameter used in this evaluation experiment was set as follows.
First, PS is set in the range of 80-100. This is because the reference value of PS proposed by Tadashi Yano et al. Is 80, and it is desirable that the reference value be 80 or more. Incidentally, as a method for calculating PS, for example, as disclosed in Japanese Patent Application Laid-Open No. 11-258047, after obtaining a calculation evaluation value P relating to skin color preference, the preference for skin color from 4 × 5 P is obtained. The index PS can be calculated.
そしてｄｕｖは−０．０１〜０．００５の範囲に設定する。また、色温度は、現在使用頻度の高いと思われる、３０００Ｋに設定する。なお、製造上のばらつきを考慮して、色温度のばらつきの範囲内を色温度弁別閾から判断し、２９５０Ｋ〜３０５０Ｋ程度の範囲とする。 And duv is set in the range of -0.01 to 0.005. The color temperature is set to 3000K, which is considered to be frequently used at present. In consideration of manufacturing variations, the range of the color temperature variation is determined from the color temperature discrimination threshold and is set to a range of about 2950K to 3050K.
そして評価者Ｈに対して、各パラメータを設定した場合において「非常に好ましい」、「とても好ましい」、「やや好ましい」、「どちらでもない」、「やや好ましくない」、「とても好ましくない」、「非常に好ましくない」の７段階で評価を実施した。評価実験の結果を図３に示す。図３ではＣＩＥＬＡＢ空間の（ａ＊，ｂ＊）軸上にプロットしたものであり、横軸にａ＊、縦軸にｂ＊を示す。また、図３では、評価実験に用いた好ましさの段階である「非常に好ましい」〜「非常に好ましくない」の７段階を、順に「７」〜「１」の評価値とした場合に、好ましさ４．０以上の評価が得られた条件を白抜き四角で示す。また同様に、好ましさ４．０未満の評価が得られた条件を図３に白抜き三角で示す。 Then, when setting each parameter for the evaluator H, “Very favorable”, “Very preferable”, “Slightly preferable”, “Neither”, “Slightly unfavorable”, “Very not preferable”, “ The evaluation was carried out in 7 grades “very unfavorable”. The result of the evaluation experiment is shown in FIG. FIG. 3 is plotted on the (a * , b * ) axis of the CIELAB space, with a * on the horizontal axis and b * on the vertical axis. Further, in FIG. 3, when the evaluation values of “7” to “1” are set in order from the seven levels “preferably” to “very not preferable”, which are the levels of preference used in the evaluation experiment. The conditions under which the evaluation of preference 4.0 or higher was obtained are indicated by white squares. Similarly, the conditions under which the evaluation of preference less than 4.0 is obtained are indicated by white triangles in FIG.
先ず、評価実験により好ましさ４．０以上の評価が得られた結果に基づいて線形近似した直線Ｘ（図３参照）を示す式１を導出する。 First, Formula 1 which shows the straight line X (refer FIG. 3) linearly approximated based on the result by which evaluation of preference 4.0 or more was obtained by evaluation experiment is derived | led-out.
次に上記評価実験に則した照光部１１のスペクトル特性（作用）の一例を図４に示す。
図４に示すスペクトル特性を有する照光部１１は、ＰＳが８４、ｄｕｖが−０．００５、色温度２９６８Ｋと設定されている。照光部１１は、図４に示すように４１０〜４７０ｎｍ間である略４４０ｎｍ近傍に第１のピーク波長Ｐ１を有し、これよりも長波長側で５８０〜６３０ｎｍ間である略６００ｎｍ近傍において第２のピーク波長Ｐ２を有する構成とされる。なお、照光部１１は、第１のピーク波長Ｐ１における相対スペクトル強度が第２のピーク波長Ｐ２における相対スペクトル強度よりも低い構成とされる。より具体的には、第２のピーク波長Ｐ２における相対スペクトル強度を１とした場合に、第１のピーク波長Ｐ１における相対スペクトル強度を略０．６となるように構成される。
Next, FIG. 4 shows an example of the spectral characteristic (action) of the illumination unit 11 in accordance with the evaluation experiment.
The illumination unit 11 having the spectral characteristics shown in FIG. 4 is set such that PS is 84, duv is −0.005, and the color temperature is 2968K. As shown in FIG. 4, the illumination unit 11 has a first peak wavelength P1 in the vicinity of about 440 nm that is between 410 and 470 nm, and the second peak in the vicinity of about 600 nm that is between 580 and 630 nm on the longer wavelength side. It is set as the structure which has the peak wavelength P2. The illumination unit 11 is configured such that the relative spectral intensity at the first peak wavelength P1 is lower than the relative spectral intensity at the second peak wavelength P2. More specifically, when the relative spectral intensity at the second peak wavelength P2 is 1, the relative spectral intensity at the first peak wavelength P1 is configured to be approximately 0.6.
このように照光部１１を構成することで、ＣＩＥＬＡＢ空間の（ａ＊，ｂ＊）＝（４６．６６，２０．７９）となり、４０≦ａ＊≦６０、２０≦ｂ＊≦３０の範囲とされる。また、（式１）により表される直線Ｘと直交する法線方向の距離ｄｘ＝１．６８となるため、ｄｘ＜１．８２を満たすこととなる。このため、照光部１１から照射される光は、色温度が略３０００Ｋで好ましさが４．０以上とすることができる。 By configuring the illumination unit 11 in this way, (a * , b * ) = (46.66, 20.79) in the CIELAB space, and the range of 40 ≦ a * ≦ 60, 20 ≦ b * ≦ 30 Is done. Further, since the distance dx = 1.68 in the normal direction orthogonal to the straight line X represented by (Expression 1), dx <1.82 is satisfied. For this reason, the light irradiated from the illumination unit 11 can have a color temperature of about 3000 K and a preference of 4.0 or more.
次に、本実施形態の特徴的な効果を記載する。
（１）色温度が略３０００Ｋ、ＣＩＥＬＡＢ空間上において４０≦ａ＊≦６０、かつ、２０≦ｂ＊≦３０であり、ＣＩＥＬＡＢ空間上の直線をＸ＝０．３８４５ａ＊−ｂ＊＋４．６５４４とし、直線Ｘからの法線距離ｄｘが１．８２未満となる光を照射する照光部１１を備える。このため、好ましさ４．０以上の光を照射することができる。また、ＰＳ、ｄｕｖ、色温度の３つのパラメータではなく、１つの指標で肌色を好ましく見せることができるため、照明装置の製造や光色のばらつきの管理を容易に行うことができる。
Next, characteristic effects of the present embodiment will be described.
(1) The color temperature is approximately 3000 K, 40 ≦ a * ≦ 60 and 20 ≦ b * ≦ 30 on the CIELAB space, and the straight line on the CIELAB space is X = 0.3845a * −b * + 4.6544 The illumination unit 11 irradiates light whose normal distance dx from the straight line X is less than 1.82. For this reason, it is possible to radiate light having a preference of 4.0 or more. In addition, since the skin color can be favorably displayed with one index instead of the three parameters of PS, duv, and color temperature, it is possible to easily manufacture the lighting device and manage the variation of the light color.
（第２実施形態）
以下、本発明を具体化した第２実施形態を図６及び図７に従って説明する。尚、第１実施形態と同じ部材については同じ符号を付して図面及び説明の全て又は一部を割愛する。
(Second Embodiment)
A second embodiment of the present invention will be described below with reference to FIGS. In addition, about the same member as 1st Embodiment, the same code | symbol is attached | subjected and all or one part of drawing and description is omitted.
本実施形態の照明装置１０は、第１実施形態と異なり、３０００〜５０００Ｋの範囲の色温度において好ましい肌色とする光を照射するような構成とされている。
ここで、第１実施形態と同様に評価実験を行い、好ましさ４．９以上の評価が得られた条件を図６に白抜き四角で示す。
Unlike the first embodiment, the illuminating device 10 of the present embodiment is configured to irradiate light having a preferable skin color at a color temperature in the range of 3000 to 5000K.
Here, an evaluation experiment is performed in the same manner as in the first embodiment, and the conditions under which the evaluation of the preference of 4.9 or more is obtained are shown by white squares in FIG.
そして、評価実験により好ましさ４．９以上の評価が得られた結果に基づいて線形近似した直線Ｙ（図６参照）を示す式３を導出する。 Then, Equation 3 is derived, which shows a straight line Y (see FIG. 6) that is linearly approximated based on the result of evaluation with a preference of 4.9 or more obtained by an evaluation experiment.
次に上記評価実験に則した照光部１１のスペクトル特性（作用）の一例を図７に示す。
図７に示すスペクトル特性を有する照光部１１は、ＰＳが９８、ｄｕｖが−０．００６、色温度３６２０Ｋと設定されている。照光部１１は、図７に示すように４１０〜４７０ｎｍ間である略４５０ｎｍ近傍に第１のピーク波長Ｐ１を有し、これよりも長波長側で５８０〜６３０ｎｍ間である略６２０ｎｍ近傍において第２のピーク波長Ｐ２を有する構成とされる。なお、照光部１１は、第１のピーク波長Ｐ１における相対スペクトル強度が第２のピーク波長Ｐ２における相対スペクトル強度よりも低い構成とされる。より具体的には、第２のピーク波長Ｐ２における相対スペクトル強度を１とした場合に、第１のピーク波長Ｐ１における相対スペクトル強度を略０．９となるように構成される。
Next, FIG. 7 shows an example of the spectral characteristic (action) of the illumination unit 11 in accordance with the evaluation experiment.
The illumination unit 11 having the spectral characteristics shown in FIG. 7 is set such that PS is 98, duv is −0.006, and the color temperature is 3620K. As shown in FIG. 7, the illumination unit 11 has a first peak wavelength P1 in the vicinity of about 450 nm that is between 410 and 470 nm, and the second peak in the vicinity of about 620 nm that is between 580 and 630 nm on the longer wavelength side. It is set as the structure which has the peak wavelength P2. The illumination unit 11 is configured such that the relative spectral intensity at the first peak wavelength P1 is lower than the relative spectral intensity at the second peak wavelength P2. More specifically, when the relative spectral intensity at the second peak wavelength P2 is 1, the relative spectral intensity at the first peak wavelength P1 is set to approximately 0.9.
このように照光部１１を構成することで、ＣＩＥＬＡＢ空間の（ａ＊，ｂ＊）＝（５３．３３，２５．２８）となり、４４≦ａ＊≦５５、２１≦ｂ＊≦２７の範囲とされる。また、（式３）により表される直線Ｙと直交する法線方向の距離ｄｙ＝０．８１となるため、ｄｙ＜０．９３を満たすこととなる。このため、照光部１１から照射される光は、色温度が３０００〜５０００Ｋの範囲である略３６２０Ｋで、好ましさが４．９以上とすることができる。 By configuring the illumination unit 11 in this way, (a * , b * ) = (53.33, 25.28) of the CIELAB space is obtained, and 44 ≦ a * ≦ 55 and 21 ≦ b * ≦ 27. Is done. Further, since the distance dy = 0.81 in the normal direction orthogonal to the straight line Y represented by (Expression 3), dy <0.93 is satisfied. For this reason, the light irradiated from the illuminating unit 11 can have a color temperature of about 3620 K in the range of 3000 to 5000 K, and the preference can be 4.9 or more.
次に、本実施形態の特徴的な効果を記載する。
（１）色温度が３０００Ｋ〜５０００Ｋ、ＣＩＥＬＡＢ空間上において４４≦ａ＊≦５５、かつ、２１≦ｂ＊≦２７であり、ＣＩＥＬＡＢ空間上の直線をＹ＝０．４１９１ａ＊−ｂ＊＋３．８０７４とし、直線Ｙからの法線距離ｄｙが０．９３未満となる光を照射する照光部１１を備える。このため、好ましさ４．９以上の光を照射することができる。また、ＰＳ、ｄｕｖ、色温度の３つのパラメータではなく、１つの指標で肌色を好ましく見せることができるため、照明装置の製造や光色のばらつきの管理を容易に行うことができる。
Next, characteristic effects of the present embodiment will be described.
(1) The color temperature is 3000K to 5000K, 44 ≦ a * ≦ 55 and 21 ≦ b * ≦ 27 on the CIELAB space, and the straight line on the CIELAB space is Y = 0.4191a * −b * + 3.8074 And an illuminating unit 11 that emits light having a normal distance dy from the straight line Y of less than 0.93. For this reason, it is possible to irradiate light with a preference of 4.9 or more. In addition, since the skin color can be favorably displayed with one index instead of the three parameters of PS, duv, and color temperature, it is possible to easily manufacture the lighting device and manage the variation of the light color.
尚、本発明の各実施形態は、以下のように変更してもよい。
・上記各実施形態では、照光部１１のスペクトル特性を図４及び図７に示すような構成としたが、これに限らない。例えば、図５に示すようなスペクトル特性となるように照光部１１を構成してもよい。照光部１１は、図５に示すように４１０〜４７０ｎｍ間である略４３０ｎｍ近傍に第１のピーク波長Ｐ１を有し、これよりも長波長側で５８０〜６３０ｎｍ間である略６００ｎｍ近傍において第２のピーク波長Ｐ２を有する構成とされる。また、第２のピーク波長Ｐ２の短波長側及び長波長におけるスペクトル強度が図４に示す照光部１１のスペクトル強度よりも高く維持される。このようにスペクトル特性については一例にすぎず、ＣＩＥＬＡＢ空間上の座標が４０≦ａ＊≦６０、２０≦ｂ＊≦３０の範囲とされるか、４４≦ａ＊≦５５、２１≦ｂ＊≦２７の範囲とされれば、スペクトル特性は特に問わない。
Each embodiment of the present invention may be modified as follows.
In each of the above embodiments, the spectral characteristics of the illumination unit 11 are configured as shown in FIGS. 4 and 7, but the present invention is not limited to this. For example, the illumination unit 11 may be configured to have spectral characteristics as shown in FIG. As shown in FIG. 5, the illumination unit 11 has a first peak wavelength P1 in the vicinity of about 430 nm, which is between 410 and 470 nm, and a second in the vicinity of about 600 nm which is between 580 and 630 nm on the longer wavelength side. It is set as the structure which has the peak wavelength P2. Further, the spectral intensity at the short wavelength side and the long wavelength of the second peak wavelength P2 is maintained higher than the spectral intensity of the illumination unit 11 shown in FIG. As described above, the spectral characteristic is merely an example, and the coordinates in the CIELAB space are in a range of 40 ≦ a * ≦ 60, 20 ≦ b * ≦ 30, or 44 ≦ a * ≦ 55, 21 ≦ b * ≦. If the range is 27, the spectral characteristics are not particularly limited.
・上記実施形態では、ＬＥＤ素子１１ａと蛍光体１１ｂとの間に所定の空隙を設ける構成としたが、ＬＥＤ素子１１ａに蛍光体を塗布する構成を採用してもよい。
・上記実施形態では、１つのＬＥＤ素子１１ａ及び１つの蛍光体１１ｂにて照光部１１を構成したが、これに限らず、仕様等に合わせて適宜変更してもよい。略白色に点灯する照光部１１の変形例としては、次のような構成が考えられる。但し、本発明が適用可能なものであればこれに限らない。
In the above embodiment, the predetermined gap is provided between the LED element 11a and the phosphor 11b. However, a configuration in which the phosphor is applied to the LED element 11a may be employed.
In the above embodiment, the illumination unit 11 is configured by one LED element 11a and one phosphor 11b. However, the present invention is not limited thereto, and may be appropriately changed according to specifications and the like. As a modified example of the illumination unit 11 that is lit in substantially white, the following configuration is conceivable. However, the present invention is not limited to this as long as the present invention is applicable.
例えば図８に示すように、１つのＬＥＤ素子１１ａとこの素子１１ａを覆う１つの蛍光体１１ｂに加えて、前記ＬＥＤ素子１１ａとピーク波長の異なるＬＥＤ素子２０を備えた構成を採用してもよい。 For example, as shown in FIG. 8, in addition to one LED element 11a and one phosphor 11b covering the element 11a, a configuration including an LED element 20 having a peak wavelength different from that of the LED element 11a may be employed. .
また、図９に示すように、１つのＬＥＤ素子１１ａとこの素子１１ａを覆う１つの蛍光体１１ｂに加えて、前記ＬＥＤ素子１１ａとピーク波長が略同一のＬＥＤ素子２１ａと前記蛍光体１１ｂとは異なる蛍光体２１ｂとを備えた構成を採用してもよい。 Further, as shown in FIG. 9, in addition to one LED element 11a and one phosphor 11b covering this element 11a, the LED element 21a and the phosphor 11b, which have substantially the same peak wavelength as the LED element 11a, You may employ | adopt the structure provided with different fluorescent substance 21b.
また、図１０に示すように、青色のＬＥＤ素子２２ａ及びこの素子２２ａを覆って赤色に発光させる蛍光体２２ｂと、青色のＬＥＤ素子２３ａ及びこの素子２３ａを覆って緑色に発光させる蛍光体２３ｂと、青色のＬＥＤ素子２４とで照光部１１を構成してもよい。 Further, as shown in FIG. 10, a blue LED element 22a and a phosphor 22b that covers the element 22a and emits red light, and a blue LED element 23a and a phosphor 23b that covers the element 23a and emits green light. The illumination unit 11 may be configured with the blue LED element 24.
また、図１１に示すように、青色のＬＥＤ素子２５と、緑色のＬＥＤ素子２６と、赤色のＬＥＤ素子２７とで照光部１１を構成してもよい。
また、透過・拡散フィルタを用いて照光部１１を構成して、例えば図４に示すようなスペクトル特性を満足する構成を採用してもよい。
Moreover, as shown in FIG. 11, you may comprise the illumination part 11 by the blue LED element 25, the green LED element 26, and the red LED element 27. As shown in FIG.
Further, the illumination unit 11 may be configured using a transmission / diffusion filter, and for example, a configuration that satisfies the spectral characteristics as illustrated in FIG. 4 may be employed.
１０…照明装置、１１…照光部、Ｘ，Ｙ…直線、ｄｘ，ｄｙ…距離。 DESCRIPTION OF SYMBOLS 10 ... Illuminating device, 11 ... Illumination part, X, Y ... Straight line, dx, dy ... Distance.
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| JP2011244977A JP2013101834A (en) | 2011-11-08 | 2011-11-08 | Luminaire |
| PCT/JP2012/006565 WO2013069208A1 (en) | 2011-11-08 | 2012-10-12 | Illumination device |
| CN201280053537.3A CN104025714B (en) | 2011-11-08 | 2012-10-12 | Illuminator |
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| JP2011244977A JP2013101834A (en) | 2011-11-08 | 2011-11-08 | Luminaire |
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