本発明は、植物育成用に最適な６６０ｎｍ近傍の赤色光を主光源としながらも、照射対象が白色光に照らされているように見える照明装置に関する。 The present invention relates to an illuminating device in which red light near 660 nm, which is optimal for plant growth, is used as a main light source, and an irradiation target appears to be illuminated with white light.
従来、人工光を照射して植物を育成する方法が知られている。このような育成方法では、植物の成長を促進するために赤色光が用いられることがあるが、このような場合、赤色光を照射された植物も赤みを帯びて見える（非特許文献１、２）。 Conventionally, a method of growing a plant by irradiating artificial light is known. In such a breeding method, red light may be used to promote the growth of the plant. In such a case, the plant irradiated with the red light also appears reddish (Non-Patent Documents 1 and 2). ).
このように植物が本来の色とは異なり赤みを帯びて見えると、育成対象が野菜である場合は食欲をそそらず、育成対象が観葉植物である場合は鑑賞性が低下してしまう。また、植物本来の色が確認できないと、植物の健康状態を把握することが困難になり、育成管理が難しくなる。 Thus, if the plant looks reddish unlike the original color, the appetite is not appreciable when the growing object is a vegetable, and the appreciability decreases when the growing object is a foliage plant. Moreover, if the original color of the plant cannot be confirmed, it will be difficult to grasp the health condition of the plant, and the breeding management will be difficult.
また、植物を育成するために用いられる赤色光を発する光源を、一般の家庭やレストラン、ホテル等の商業施設で使用することは通常好まれない。 In addition, it is usually not preferred to use a light source that emits red light used for growing plants in commercial facilities such as ordinary homes, restaurants, and hotels.
本発明はかかる問題点に鑑みなされたものであって、植物育成用に最適な６６０ｎｍ近傍の赤色光を主光源としながらも、照射対象が白色光に照らされているように見える照明装置を提供することをその主たる所期課題としたものである。 The present invention has been made in view of such problems, and provides an illuminating device in which red light near 660 nm, which is optimal for plant growth, is used as a main light source, and an irradiation target appears to be illuminated by white light. This is the main desired task.
すなわち本発明に係る照明装置は、赤色光と緑色光と青色光との混合光を発する照明装置であって、前記赤色光が、６３０〜６８０ｎｍの波長領域に含まれる光であり、前記赤色光（Ｒ）と前記緑色光（Ｇ）と前記青色光（Ｂ）との光合成光量子束密度（以下、ＰＰＦＤという。）の比が、各色光のＰＰＦＤの合計１００％に対して、Ｒ：Ｇ：Ｂ＝６０〜８０％：１０〜３０％：５〜１５％であることを特徴とする。なお、ここで、前記緑色光は、４９５〜５７０ｎｍの波長領域に含まれる光であり、前記青色光は、４３０〜４９５ｎｍの波長領域に含まれる光である。また、前記緑色光及び青色光は、図６に示す色度図において、前記緑色光が緑、黄味緑又は黄緑の領域に含まれる色度座標を有する光であり、前記青色光が緑味青、青又は紫味青の領域に含まれる色度座標を有する光であってもよい。 That is, the illumination device according to the present invention is an illumination device that emits mixed light of red light, green light, and blue light, wherein the red light is light included in a wavelength region of 630 to 680 nm, and the red light The ratio of the photosynthetic photon flux density (hereinafter referred to as PPFD) of (R), the green light (G), and the blue light (B) is R: G: B = 60-80%: 10-30%: 5-15%. Here, the green light is light included in a wavelength region of 495 to 570 nm, and the blue light is light included in a wavelength region of 430 to 495 nm. Further, the green light and the blue light are light having chromaticity coordinates included in a green, yellowish green, or yellow-green region in the chromaticity diagram shown in FIG. 6, and the blue light is green. It may be light having chromaticity coordinates included in the region of taste blue, blue, or purple blue.
このようなものであれば、本発明に係る照明装置から射出される光には、図７のクロロフィルの吸収スペクトルに示すように、光合成に利用されやすい（クロロフィルに吸収されやすい）６３０〜６８０ｎｍの赤色光が、全ＰＰＦＤの６０〜８０％という高い割合で含まれているので、植物の成長を効果的に促進することができる。一方、６３０〜６８０ｎｍの赤色光に対するヒトの視細胞の感度は低く、例えば、図８の等色関数に示すように、６５０〜６７０ｎｍの赤色光に対するヒトの視細胞の感度は、６００〜６１０ｎｍの赤色光に対する感度の約１／６である。このため、赤色光が全ＰＰＦＤの６０〜８０％という高い割合で含まれていても、観察者には照明装置からは白色光が射出されているように視認される。従って、本発明に係る照明装置によれば、植物育成用に最適な６６０ｎｍ近傍の赤色光を主光源としながらも、照射対象が白色光に照らされているように見えるので、植物育成用の光源として好適であるとともに、白色照明用の光源としても好適に用いることができる。 If it is such, as shown in the absorption spectrum of chlorophyll in FIG. 7, the light emitted from the illumination device according to the present invention is easily used for photosynthesis (easily absorbed by chlorophyll) of 630 to 680 nm. Since red light is contained at a high rate of 60 to 80% of the total PPFD, plant growth can be effectively promoted. On the other hand, the sensitivity of human photoreceptor cells to red light of 630 to 680 nm is low. For example, as shown in the color matching function of FIG. 8, the sensitivity of human photoreceptor cells to red light of 650 to 670 nm is 600 to 610 nm. It is about 1/6 of the sensitivity to red light. For this reason, even if red light is included at a high rate of 60 to 80% of the total PPFD, the observer visually recognizes that white light is emitted from the illumination device. Therefore, according to the illuminating device according to the present invention, the irradiation target appears to be illuminated with white light while the main light source is red light near 660 nm which is optimal for plant growth. As well as a light source for white illumination.
なお、赤色光（Ｒ）と緑色光（Ｇ）と青色光（Ｂ）とのＰＰＦＤ比が、Ｒ：Ｇ：Ｂ＝６０〜８０％：１０〜３０％：５〜１５％である範囲のうち、（１）赤色光が多く、緑色光と青色光とが少ない場合は、赤黄白色から電球色の混合光が得られ、（２）赤色光と緑色光とが中程度で、青色光が少ない場合は、青緑白色の混合光が得られ、（３）赤色光が中程度で、緑色光と青色光とが少ない場合は、黄緑白色の混合光が得られる。 Of the ranges where the PPFD ratio of red light (R), green light (G) and blue light (B) is R: G: B = 60-80%: 10-30%: 5-15% (1) When there is a lot of red light and little green light and blue light, mixed light of light bulb color is obtained from red yellow white, and (2) the red light and green light are medium and the blue light is When the amount is small, blue-green-white mixed light is obtained, and (3) when red light is medium and when green light and blue light are small, yellow-green-white mixed light is obtained.
前記青色光は、４２０〜４６０ｎｍの波長領域に含まれる光であることが好ましい。本発明における各色光のうち、赤色光と青色光は植物の育成を促進するために必須の光であるが、青色光が多すぎるとかえって植物の成長が抑制される場合があることも知られている。このため、植物の成長の観点からは、青色光の割合は全ＰＰＦＤの５〜１０％であることが好ましい。しかし、例えば４７０ｎｍの青色光を用いた場合は、照明装置から発せられる混合光が白色光であると視認されるようにするためには、青色光の割合を全ＰＰＦＤの１５〜２０％程度にすることが必要である。一方、青色光に対するヒトの視細胞の感度は波長により異なり、例えば、図８の等色関数に示すように、４５０ｎｍの青色光に対する感度は４７０ｎｍの青色光に対する感度の１．５倍である。このため、前記青色光が４２０〜４６０ｎｍの波長領域に含まれる光であれば、青色光の割合を５〜１０％に抑えて、植物の成長を妨げないようにしながらも、白色光と視認される混合光を得ることができる。 The blue light is preferably light included in a wavelength region of 420 to 460 nm. Among each color light in the present invention, red light and blue light are indispensable light for promoting the growth of plants, but it is also known that plant growth may be suppressed if there is too much blue light. ing. For this reason, from the viewpoint of plant growth, the proportion of blue light is preferably 5 to 10% of the total PPFD. However, for example, when blue light with a wavelength of 470 nm is used, the ratio of blue light is set to about 15 to 20% of the total PPFD so that the mixed light emitted from the lighting device is visually recognized as white light. It is necessary to. On the other hand, the sensitivity of human photoreceptors to blue light varies depending on the wavelength. For example, as shown in the color matching function of FIG. 8, the sensitivity to 450 nm blue light is 1.5 times the sensitivity to 470 nm blue light. For this reason, if the blue light is light included in the wavelength region of 420 to 460 nm, the ratio of blue light is suppressed to 5 to 10% and the growth of the plant is not hindered, but it is visually recognized as white light. Mixed light can be obtained.
また、本発明に係る照明装置が発する混合光は、色度図上の下記式（１）〜（４）で表される直線に囲まれた領域に含まれる色度座標を有する白色光であることが実験により確認された。
ｙ＝ｘ−０．０７・・・（１）
ｙ＝ｘ＋０．０６・・・（２）
ｙ＝−ｘ＋０．７６・・・（３）
ｙ＝−ｘ＋０．８８・・・（４）Moreover, the mixed light which the illuminating device which concerns on this invention emits is white light which has the chromaticity coordinate contained in the area | region enclosed by the straight line represented by following formula (1)-(4) on a chromaticity diagram. This was confirmed by experiments.
y = x−0.07 (1)
y = x + 0.06 (2)
y = −x + 0.76 (3)
y = −x + 0.88 (4)
当該実験結果を図９に示すが、図９に示す色度図において、白丸が実験に供された照明装置が発した混合光の色度座標を示すものである。 The experimental results are shown in FIG. 9. In the chromaticity diagram shown in FIG. 9, white circles indicate the chromaticity coordinates of the mixed light emitted by the lighting device used for the experiment.
本発明に係る照明装置の具体的な態様としては、例えば、以下のような構成を有するものが挙げられる。
（１）赤色ＬＥＤ素子と青色ＬＥＤ素子と色度図上の緑、黄味緑又は黄緑の領域に含まれる色度座標を有する緑色光を発する緑色蛍光体とを備えた照明装置。
（２）赤色ＬＥＤ素子と緑色ＬＥＤ素子と青色ＬＥＤ素子とを備えた照明装置。As a specific aspect of the lighting device according to the present invention, for example, one having the following configuration can be cited.
(1) An illumination device including a red LED element, a blue LED element, and a green phosphor that emits green light having chromaticity coordinates included in a green, yellowish green, or yellowish green region on the chromaticity diagram.
(2) A lighting device including a red LED element, a green LED element, and a blue LED element.
本発明における各色光のうち、緑色光は照明装置が発する混合光が白色光に見えるようにするための色の調整に必要な光であるが、上記の態様のうち、（１）の態様では緑色光の強度を緑色蛍光体の濃度で調整することができるので、緑色ＬＥＤ素子への電流値で緑色光の強度を制御する（２）の態様に比べて、演色性の制御が容易である。 Among each color light in the present invention, green light is light necessary for adjusting the color so that the mixed light emitted from the lighting device looks white light. Among the above aspects, in the aspect (1), Since the intensity of the green light can be adjusted by the concentration of the green phosphor, the color rendering property can be easily controlled as compared with the aspect (2) in which the intensity of the green light is controlled by the current value to the green LED element. .
本発明に係る照明装置によれば、植物育成用に最適な６６０ｎｍ近傍の赤色光を主光源としながらも、照射対象が白色光に照らされているように見えるので、本発明に係る照明装置は、植物育成用の光源として好適であるとともに、白色照明用の光源としても好適に用いることができる。このような本発明に係る照明装置を備えた植物育成装置もまた、本発明の１つである。 According to the illuminating device according to the present invention, the illumination target according to the present invention appears to be illuminated with white light while the main light source is red light near 660 nm that is optimal for plant growth. In addition to being suitable as a light source for plant growth, it can also be suitably used as a light source for white illumination. The plant growing apparatus provided with such a lighting device according to the present invention is also one aspect of the present invention.
目的とする白色光を発する照明装置を製造するには以下のようにすればよい。まず、（１）色度図上に、赤色ＬＥＤ素子が発する赤色光の色度座標を有する点と目的Ｖ白色光の色度座標を有する点とを結ぶ直線Ａを作成する。更に、（２）色度図上に、青色ＬＥＤ素子が発する青色光の色度座標を有する点と緑色蛍光体が発する緑色光の色度座標を有する点とを結ぶ直線Ｂを作成する。次いで、（３）前記青色ＬＥＤ素子と組み合わせて用いて照明装置を構成した場合に、前記直線Ａと前記直線Ｂとの交点の色度座標を有する光が得られるような緑色蛍光体の配合量を算出する。そして、（４）前記青色ＬＥＤ素子と前記配合量の緑色蛍光体と前記赤色ＬＥＤ素子とを組み合わせて用いて照明装置を構成した場合に、前記目的とする白色光が得られるように前記青色ＬＥＤ素子と前記赤色ＬＥＤ素子との電流値を調整して、前記青色光と前記赤色光との光合成光量子束密度を決定する。このような各工程を有する照明装置の製造方法もまた、本発明の１つである。 What is necessary is just as follows in order to manufacture the illuminating device which emits the target white light. First, (1) on the chromaticity diagram, a straight line A connecting a point having chromaticity coordinates of red light emitted from a red LED element and a point having chromaticity coordinates of target V white light is created. Further, (2) on the chromaticity diagram, a straight line B connecting the point having the chromaticity coordinate of the blue light emitted from the blue LED element and the point having the chromaticity coordinate of the green light emitted from the green phosphor is created. Next, (3) when the lighting device is configured in combination with the blue LED element, the amount of the green phosphor that can obtain light having the chromaticity coordinate of the intersection of the straight line A and the straight line B is obtained. Is calculated. (4) When the lighting device is configured by combining the blue LED element, the green phosphor of the blending amount, and the red LED element, the blue LED so that the target white light is obtained. The current value of the element and the red LED element is adjusted to determine the photosynthetic photon flux density of the blue light and the red light. The manufacturing method of the illuminating device which has such each process is also one of this invention.
このような構成の本発明によれば、植物の成長を効果的に促進することができるとともに、ヒトには白色光が射出されているように視認される照明装置を提供することができる。このような照明装置は、植物育成装置や植物工場用の光源として好適に用いることができるだけでなく、一般家庭用や、レストラン、ホテル等の商業施設用の白色光源としても好適に用いることができる。 According to the present invention having such a configuration, it is possible to provide a lighting device that can effectively promote the growth of a plant and can be visually recognized as white light is emitted to a human. Such an illuminating device can be suitably used not only as a light source for a plant growing device or a plant factory, but can also be suitably used as a white light source for general households or commercial facilities such as restaurants and hotels. .
以下に本発明の一実施形態について図面を参照して説明する。 An embodiment of the present invention will be described below with reference to the drawings.
本実施形態に係る照明装置１００は、図１〜３に示すように、屋内において天井等に設けられている蛍光灯本体に取り付けるための概略細円筒状のＬＥＤ蛍光管であり、両端に設けられた口金部１１と、２つの口金部１１に挟まれる円筒状の照明部Ｌと、を備えている。 As shown in FIGS. 1 to 3, the illuminating device 100 according to the present embodiment is a substantially thin cylindrical LED fluorescent tube that is attached to a fluorescent lamp main body provided indoors on a ceiling or the like, and is provided at both ends. A base part 11 and a cylindrical illumination part L sandwiched between the two base parts 11.
以下に各部を詳述する。 Each part is described in detail below.
口金部１１は、その内部に、蛍光灯本体から供給される交流電圧をＬＥＤ２の点灯に適した直流に変換するための直流変換回路や照明部Ｌの各種制御を行う制御部を備えている。なお、前記直流変換回路は、口金部１１の内部に設けるのではなく、蛍光管の外側に設けてもよい。 The base unit 11 includes therein a DC conversion circuit for converting an AC voltage supplied from the fluorescent lamp body into a DC suitable for lighting the LED 2 and a control unit that performs various controls of the illumination unit L. Note that the DC conversion circuit may be provided outside the fluorescent tube instead of being provided inside the base part 11.
照明部Ｌは、図２及び３に示すように、照明装置１００の長手方向に延伸し、各色ＬＥＤ２が実装された基板１２と、基板１２の裏側に設けられ、ＬＥＤ２の放熱を行うための長手方向に伸びる概略直方体形状の放熱部１３と、放熱部１３及び基板１２と係止される概略Ｃ字状に曲がって長手方向に延伸するカバー部１４とから構成されている。カバー部１４は本実施形態では半透明のものであり、各色ＬＥＤ２からの光を透過するように構成されている。 As shown in FIGS. 2 and 3, the illumination unit L extends in the longitudinal direction of the illumination device 100, and is provided on the substrate 12 on which each color LED 2 is mounted, and on the back side of the substrate 12. The heat-radiating part 13 has a substantially rectangular parallelepiped shape extending in the direction, and the cover part 14 is bent in a general C shape and is extended in the longitudinal direction to be engaged with the heat-radiating part 13 and the substrate 12. The cover portion 14 is translucent in the present embodiment, and is configured to transmit light from each color LED 2.
ＬＥＤ２は、図３に示すように、基板１２の表側に複数個が実装されており、当該複数のＬＥＤ２は、基板１２上に長手方向にわたり等間隔で一列に設けてある。 As shown in FIG. 3, a plurality of LEDs 2 are mounted on the front side of the substrate 12, and the plurality of LEDs 2 are provided on the substrate 12 in a line at equal intervals over the longitudinal direction.
ＬＥＤ２としては、赤色ＬＥＤ２Ｒと、青緑色ＬＥＤ２ＢＧとが用いられており、赤色ＬＥＤ２Ｒは、ピーク波長が６６０ｎｍである赤色光Ｒを射出する赤色ＬＥＤ素子を備えたものであり、青緑色ＬＥＤ２ＢＧは、ピーク波長が４５０ｎｍである青色光Ｂを射出する青色ＬＥＤ素子と、封止材中に分散された緑色蛍光体とを備えたものである。青緑色ＬＥＤ２ＢＧにおいては、青色ＬＥＤ素子から発せられた青色光Ｂは、その一部が緑色蛍光体５１Ｇに当たり緑色光Ｇに変換され、残部がそのまま照明装置１００外に放射される。 As the LED 2, a red LED 2R and a blue-green LED 2BG are used. The red LED 2R includes a red LED element that emits red light R having a peak wavelength of 660 nm, and the blue-green LED 2BG has a peak. A blue LED element that emits blue light B having a wavelength of 450 nm and a green phosphor dispersed in a sealing material are provided. In the blue-green LED 2BG, a part of the blue light B emitted from the blue LED element hits the green phosphor 51G and is converted into the green light G, and the remaining part is radiated to the outside of the illumination device 100 as it is.
各色ＬＥＤ２から射出される光の強度は、赤色光Ｒと緑色光Ｇと青色光ＢとのＰＰＦＤの比が、各色光のＰＰＦＤの合計１００％に対して、Ｒ：Ｇ：Ｂ＝６０〜８０％：１０〜３０％：５〜１５％となるように設定されている。 The intensity of light emitted from each color LED 2 is such that the ratio of PPFD of red light R, green light G and blue light B is 100% of the total PPFD of each color light, and R: G: B = 60-80. %: 10 to 30%: 5 to 15%.
本実施形態に係る照明装置１を製造するには以下のようにすればよい。まず、図４に示すように、（１）色度図上に、赤色ＬＥＤ素子が発する６６０ｎｍの赤色光Ｒの色度座標を有する点Ｒと目的とする白色光の色度座標を有する点Ｔとをプロットし、点Ｒと点Ｔとを結ぶ直線Ａを作成する。更に、（２）色度図上に、青色ＬＥＤ素子が発する４５０ｎｍの青色光Ｂの色度座標を有する点Ｂと緑色蛍光体５１Ｇが発する緑色光Ｇ（ピーク波長）の色度座標を有する点Ｇとをプロットし、点Ｂと点Ｇとを結ぶ直線Ｂを作成する。次いで、（３）青色ＬＥＤ素子と組み合わせて用いて照明装置を構成した場合に、直線Ａと直線Ｂとの交点Ｃの色度座標を有する光が得られるような緑色蛍光体の配合量を算出する。そして、（４）青色ＬＥＤ素子と当該配合量の緑色蛍光体と赤色ＬＥＤ素子とを組み合わせて用いて照明装置を構成した場合に、目的とする白色光が得られるように青色ＬＥＤ素子と赤色ＬＥＤ素子との電流値を調整して、青色光と赤色光とのＰＰＦＤを決める。 What is necessary is just to perform as follows to manufacture the illuminating device 1 which concerns on this embodiment. First, as shown in FIG. 4, (1) on the chromaticity diagram, a point R having chromaticity coordinates of 660 nm red light R emitted from the red LED element and a point T having chromaticity coordinates of target white light. And a straight line A connecting the point R and the point T is created. Further, (2) on the chromaticity diagram, a point B having chromaticity coordinates of 450 nm blue light B emitted from the blue LED element and a chromaticity coordinate of green light G (peak wavelength) emitted from the green phosphor 51G. G is plotted, and a straight line B connecting the point B and the point G is created. Next, (3) when the lighting device is configured in combination with the blue LED element, the blending amount of the green phosphor is calculated so that light having the chromaticity coordinate of the intersection C between the straight line A and the straight line B is obtained. To do. (4) When the lighting device is configured by combining the blue LED element, the green phosphor of the blending amount, and the red LED element, the blue LED element and the red LED are obtained so that the target white light is obtained. The PPFD of blue light and red light is determined by adjusting the current value with the element.
このようなものであれば、照明装置１００から射出される光には、光合成に利用されやすい（クロロフィルに吸収されやすい）６６０ｎｍ近傍の赤色光Ｒが、全ＰＰＦＤの６０〜８０％という高い割合で含まれているので、植物の成長を効果的に促進することができる。一方、６６０ｎｍ近傍の赤色光Ｒに対するヒトの視細胞の感度は低いので、赤色光Ｒが全ＰＰＦＤの６０〜８０％という高い割合で含まれていても、観察者には照明装置１００からは白色光が射出されているように視認される。このため、照明装置１００は植物育成用の光源としてだけでなく、家庭用等の白色光源としても好適に用いることができる。 If it is such, in the light inject | emitted from the illuminating device 100, the red light R of 660 nm vicinity which is easy to be utilized for photosynthesis (it is easy to be absorbed by chlorophyll) is a high ratio of 60 to 80% of all PPFD. Since it is contained, plant growth can be effectively promoted. On the other hand, since the sensitivity of the human photoreceptor cell to the red light R near 660 nm is low, even if the red light R is included at a high rate of 60 to 80% of the total PPFD, the observer will see white from the illumination device 100. It is visually recognized as light is emitted. For this reason, the illumination device 100 can be suitably used not only as a light source for plant growth but also as a white light source for home use.
また、照明装置１００から射出される光に含まれる青色光Ｂは、ヒトの視細胞の感度が高い４５０ｎｍ近傍の青色光Ｂであるので、植物の生長を阻害することもある青色光Ｂの割合を５〜１０％に抑えて、植物の成長を妨げないようにしながら、白色光と視認される混合光を得ることができる。 In addition, since the blue light B included in the light emitted from the lighting device 100 is a blue light B in the vicinity of 450 nm where the sensitivity of human photoreceptors is high, the ratio of the blue light B that may inhibit the growth of plants. The mixed light that is visually recognized as white light can be obtained while suppressing the growth to 5 to 10% so that the growth of the plant is not hindered.
なお、本発明は前記実施形態に限られるものではない。 The present invention is not limited to the above embodiment.
例えば、本発明に係る照明装置は、図５に示すように、ＬＥＤ２として、赤色ＬＥＤ素子を備えた赤色ＬＥＤ２Ｒと、緑色ＬＥＤ素子を備えた緑色ＬＥＤ２Ｇと、青色ＬＥＤ素子を備えた青色ＬＥＤ２Ｂとを備えたものであってもよい。なお、緑色ＬＥＤ２Ｇとしては、例えば、ピーク波長が５２５ｎｍである緑色光Ｇを射出する緑色ＬＥＤ素子を備えたものを用いることができる。 For example, as shown in FIG. 5, the lighting device according to the present invention includes, as LED 2, a red LED 2 </ b> R including a red LED element, a green LED 2 </ b> G including a green LED element, and a blue LED 2 </ b> B including a blue LED element. It may be provided. In addition, as green LED 2G, what was equipped with the green LED element which inject | emits the green light G whose peak wavelength is 525 nm can be used, for example.
また、本発明に係る照明装置が発する混合光中の各色光のＰＰＦＤ比は、各色ＬＥＤの設置数を調整することによって調節することができ、前記実施形態に係る照明装置１００では、各色ＬＥＤ２の設置数が、赤色ＬＥＤ２Ｒ：青緑色ＬＥＤ２ＢＧ＝５：２に設定されているが、各色ＬＥＤ２の設置数はこれに限定されず、各色ＬＥＤ２に流れる電流値を制御し発光比率や発光量を変えることによっても、各色光のＰＰＦＤ比を調節することができる。 In addition, the PPFD ratio of each color light in the mixed light emitted by the lighting device according to the present invention can be adjusted by adjusting the number of installed each color LED. In the lighting device 100 according to the embodiment, each color LED 2 The number of installation is set to red LED 2R: blue green LED 2BG = 5: 2, but the number of installation of each color LED 2 is not limited to this, and the current value flowing through each color LED 2 is controlled to change the light emission ratio and the light emission amount. Also, the PPFD ratio of each color light can be adjusted.
更に、前記実施形態における青緑色ＬＥＤ２ＢＧは、緑色蛍光体が分散されている波長変換部が別途設けられていてもよい。 Furthermore, the blue-green LED 2BG in the embodiment may be provided with a wavelength conversion unit in which green phosphors are dispersed.
また、前記実施形態に係る照明装置１００では、ＬＥＤ２として、赤色ＬＥＤ素子を備えた赤色ＬＥＤ２Ｒと、青色ＬＥＤ素子と緑色蛍光体を含有する波長変換部とを備えた青緑色ＬＥＤ２ＢＧとが用いられているが、赤色ＬＥＤ素子と青色ＬＥＤ素子と緑色蛍光体とは１つのＬＥＤパッケージに収められていてもよく、赤色ＬＥＤ素子と青色ＬＥＤ素子と緑色蛍光体とを備えた白色ＬＥＤのみをＬＥＤ２として用いてもよい。 Moreover, in the illuminating device 100 which concerns on the said embodiment, red LED2R provided with the red LED element and blue-green LED2BG provided with the wavelength conversion part containing a blue LED element and a green fluorescent substance are used as LED2. However, the red LED element, the blue LED element, and the green phosphor may be housed in one LED package, and only the white LED including the red LED element, the blue LED element, and the green phosphor is used as the LED 2. May be.
前記実施形態に係る照明装置１００は、植物育成装置や植物工場用の光源として用いてもよく、また、一般家庭用の白色光源として用いることもできる。 The lighting device 100 according to the embodiment may be used as a light source for a plant growing device or a plant factory, or may be used as a white light source for general households.
その他、本発明は上記の各実施形態に限られず、本発明の趣旨を逸脱しない限り、前述した種々の構成の一部又は全部を適宜組み合わせて構成してもよい。 In addition, the present invention is not limited to the above-described embodiments, and may be configured by appropriately combining some or all of the various configurations described above without departing from the spirit of the present invention.
１００・・・照明装置
２・・・ＬＥＤ100 ... Lighting device 2 ... LED
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| JP2011270439AJP2013121331A (en) | 2011-12-09 | 2011-12-09 | Lighting device |
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| JP2011270439APendingJP2013121331A (en) | 2011-12-09 | 2011-12-09 | Lighting device |
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