JP7067395B2 - Lighting equipment - Google Patents

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JP7067395B2
JP7067395B2 JP2018184370A JP2018184370A JP7067395B2 JP 7067395 B2 JP7067395 B2 JP 7067395B2 JP 2018184370 A JP2018184370 A JP 2018184370A JP 2018184370 A JP2018184370 A JP 2018184370A JP 7067395 B2 JP7067395 B2 JP 7067395B2
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喜子 高橋
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Toshiba Lighting and Technology Corp
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Description

本発明の実施形態は、発光ダイオード（ＬＥＤ：Light Emitting Diode）ランプ等の照明装置に関する。 An embodiment of the present invention relates to a lighting device such as a light emitting diode (LED) lamp.

撮影スタジオや舞台等で使用する照明装置が知られている。照明装置は、例えば、開口部を有する箱状の器具本体を有する。器具本体内部には、光源部や制御基板等が収容されている。そして、器具本体の開口部から光源部からの照射光を被照射体を照射する構成を有している。光源部としては、演色性の高いハロゲンランプが用いられていることが多い。演色性は、自然光に近い照明を基準光にして光源部による色の見え方を評価したものであり、ＪＩＳに定められている試験色を、試料光源部と基準光で照明したときの色ずれの大きさを数値化した演色評価数で表される。演色評価数には、平均演色評価数Ｒａと特殊演色評価数Ｒｉがあり、平均演色評価数Ｒａは、試験Ｎｏ．１～８の演色評価数値の平均値として表される。特殊演色評価数Ｒｉは、試験Ｎｏ．９～１５の個々の特殊演色評価数値として表される。これらの演色評価数は、基準光源部である白色光源部による色彩を忠実に再現しているかを指数で表したもので、原則として１００に近いほど演色性が良い。 Lighting devices used in photography studios and stages are known. The illuminator has, for example, a box-shaped fixture body with an opening. A light source unit, a control board, and the like are housed inside the fixture body. Further, it has a configuration in which the irradiated body is irradiated with the irradiation light from the light source portion from the opening of the instrument main body. A halogen lamp with high color rendering properties is often used as the light source unit. Color rendering is an evaluation of the appearance of colors by the light source unit using illumination close to natural light as the reference light, and the color shift when the test color specified in JIS is illuminated with the sample light source unit and the reference light. It is expressed by the number of color rendering indexes that quantifies the size of. The color rendering index Ra includes the average color rendering index Ra and the special color rendering index Ri, and the average color rendering index Ra is the test No. It is expressed as the average value of the color rendering evaluation values 1 to 8. The special color rendering index Ri is the test No. It is expressed as an individual special color rendering evaluation value of 9 to 15. These color rendering indexes represent an index indicating whether or not the color produced by the white light source unit, which is the reference light source unit, is faithfully reproduced. In principle, the closer to 100, the better the color rendering property.

近年、長寿命で信頼性が高く、また低消費電力、耐衝撃性、高純度表示色、軽薄短小化の実現などの特徴を有することから、発光ダイオード（ＬＥＤ）などの固体発光素子を用いた照明装置（ＬＥＤランプ）が使用され始めている。 In recent years, solid-state light-emitting devices such as light-emitting diodes (LEDs) have been used because they have long life, high reliability, low power consumption, impact resistance, high-purity display colors, and realization of lightness, thinness, shortness, and miniaturization. Lighting devices (LED lamps) are beginning to be used.

照明装置は、ＬＥＤランプで白色発光を実現するため、青色発光のＬＥＤチップと黄色光ないし橙色光を発光する黄色系蛍光体とを組み合わせて構成した白色発光ＬＥＤ方式が広く実用化されている。また、照明装置は、青色フィルタと組み合わせることで色温度を調整する等の方法が採られている。 As a lighting device, in order to realize white light emission with an LED lamp, a white light emitting LED system composed of a combination of a blue light emitting LED chip and a yellowish phosphor that emits yellow light or orange light has been widely put into practical use. Further, the lighting device adopts a method such as adjusting the color temperature by combining it with a blue filter.

特開２００５－０９３９１２号公報Japanese Unexamined Patent Publication No. 2005-09392

白色発光ＬＥＤ方式を用いたＬＥＤランプにおいては、分光分布がハロゲンランプと異なる。このため、平均演色評価数Ｒａが低いうえに、特に、試験Ｎｏ．９の特殊演色評価数値Ｒ９（以下では単にＲ９と称する）の演色評価数が低く、肌色の見え方が悪くなる。したがって、人物が照明対象の中心となる撮影スタジオや舞台の照明には不向きであった。この点を改善するため、ハロゲンランプと同等の高い演色性を有する照明装置の開発が望まれている。 The spectral distribution of the LED lamp using the white light emitting LED method is different from that of the halogen lamp. Therefore, the average color rendering index Ra is low, and in particular, the test No. The color rendering index of the special color rendering index R9 (hereinafter simply referred to as R9) of 9 is low, and the appearance of the skin color becomes poor. Therefore, it was unsuitable for lighting studios and stages where people are the center of lighting. In order to improve this point, it is desired to develop a lighting device having a high color rendering property equivalent to that of a halogen lamp.

実施形態の照明装置は、色温度１８００～３３００Ｋの白色光を発する白色ＬＥＤと、ピーク波長が６６５ｎｍ以上７５０ｎｍ以下の赤色ＬＥＤとを有する。前記白色ＬＥＤ及び前記赤色ＬＥＤの混色点灯時の全光束に対する前記赤色ＬＥＤの光束比は０．８％～９．９％であり、特殊演色評価数値Ｒ９が８０以上である。 The lighting device of the embodiment includes a white LED that emits white light having a color temperature of 1800 to 3300 K, and a red LED having a peak wavelength of 665 nm or more and 750 nm or less. The luminous flux ratio of the red LED to the total luminous flux when the white LED and the red LED are mixed and lit is 0.8% to 9.9%, and the special color play evaluation value R9 is 80 or more.

実施形態によると、人物が照明対象の中心となる撮影スタジオや舞台の照明に適したハロゲンランプと同等の高い演色性を有する照明装置を提供できる。 According to the embodiment, it is possible to provide a lighting device having a high color rendering property equivalent to that of a halogen lamp suitable for lighting a photography studio or a stage where a person is the center of an illumination target.

図１は、第１の実施形態の照明装置を一部切欠して示す正面図である。FIG. 1 is a front view showing a part of the lighting device of the first embodiment with a notch. 図２は、図１の照明装置の白色ＬＥＤの色温度１６００～１８００Ｋの範囲における混色点灯時の全光束に対する赤色ＬＥＤの光束比とＲ９の演色評価数との関係を示すグラフである。FIG. 2 is a graph showing the relationship between the luminous flux ratio of the red LED to the total luminous flux at the time of mixed color lighting in the color temperature range of 1600 to 1800 K of the white LED of the lighting device of FIG. 1 and the color rendering index of R9. 図３は、図１の照明装置の白色ＬＥＤの色温度２４００～２７００Ｋの範囲における混色点灯時の全光束に対する赤色ＬＥＤの光束比とＲ９の演色評価数との関係を示すグラフである。FIG. 3 is a graph showing the relationship between the luminous flux ratio of the red LED and the color rendering index of R9 with respect to the total luminous flux at the time of mixed color lighting in the color temperature range of 2400 to 2700 K of the white LED of the lighting device of FIG. 図４は、図１の照明装置の白色ＬＥＤの色温度３０００～３３００Ｋの範囲における混色点灯時の全光束に対する赤色ＬＥＤの光束比とＲ９の演色評価数との関係を示すグラフである。FIG. 4 is a graph showing the relationship between the luminous flux ratio of the red LED to the total luminous flux at the time of mixed color lighting in the color temperature range of 3000 to 3300 K of the white LED of the lighting device of FIG. 1 and the color rendering index of R9.

照明装置１０は、色温度１８００～３３００Ｋの白色光を発する白色ＬＥＤ１０１，１０２と、ピーク波長が６６５ｎｍ以上７５０ｎｍ以下の赤色ＬＥＤ１０３とを有し、白色ＬＥＤ１０１，１０２及び赤色ＬＥＤ１０３の混色点灯時の全光束に対する赤色ＬＥＤ１０３の光束比が０．８％～９．９％であり、特殊演色評価数値Ｒ９が８０以上である。 The lighting device 10 has white LEDs 101 and 102 that emit white light having a color temperature of 1800 to 3300 K, and a red LED 103 having a peak wavelength of 665 nm or more and 750 nm or less. The light beam ratio of the red LED 103 to the red LED 103 is 0.8% to 9.9%, and the special color development evaluation value R9 is 80 or more.

以下、図面を参照しながら実施形態について詳細に説明する。
図１は、第１の実施形態の照明装置１０の外観を一部切欠して示す正面図である。 Hereinafter, embodiments will be described in detail with reference to the drawings.
FIG. 1 is a front view showing the appearance of the lighting device 10 of the first embodiment with a partial notch.

本実施形態のＬＥＤ照明器具型の照明装置１０は、樹脂製或いは金属製の装置本体２０を備えている。この装置本体２０は有底筒状に形成された筐体２１を有している。筐体２１の底部２２には、光源部１００，１００と、これら光源部１００，１００に接続された回路基板２００が設けられている。また、筐体２１の開口２３は透明またはフロスト・乳白のガラスないし樹脂のカバー２４により閉塞されている。筐体２１の開口２３周囲にはバーンドア（遮光板）３０が蝶番３１を介して揺動自在に取り付けられている。 The LED lighting fixture type lighting device 10 of the present embodiment includes a device main body 20 made of resin or metal. The apparatus main body 20 has a housing 21 formed in a bottomed cylindrical shape. The bottom portion 22 of the housing 21 is provided with light source units 100, 100 and a circuit board 200 connected to these light source units 100, 100. Further, the opening 23 of the housing 21 is closed by a transparent or frosted / milky white glass or resin cover 24. A burn door (light-shielding plate) 30 is swingably attached around the opening 23 of the housing 21 via a hinge 31.

装置本体２０は、フレーム４０に回動支持部４１を介して回動自在に支持されている。 The apparatus main body 20 is rotatably supported by the frame 40 via a rotation support portion 41.

光源部１００には、白色ＬＥＤ１０１，１０２と、赤色ＬＥＤ１０３とが配設されている。白色ＬＥＤ１０１，１０２は、青色発光のＬＥＤチップと黄色光ないし橙色光を発光する黄色系蛍光体とを組み合わせて構成されている。赤色ＬＥＤ１０３は赤色発光のＬＥＤチップであり、また、青色発光のＬＥＤチップと赤色系蛍光体とを組み合わせて構成してもよい。白色ＬＥＤ１０１と白色ＬＥＤ１０２とは同一の色温度のものでも良く、また異なる色温度のものであってもよいが、白色ＬＥＤ１０１，１０２が発生する白色光は、色温度１８００～３３００Ｋの範囲に設定することにより、従来光源であるハロゲンランプの色温度範囲をカバーできる。 The light source unit 100 is provided with white LEDs 101 and 102 and a red LED 103. The white LEDs 101 and 102 are configured by combining an LED chip that emits blue light and a yellow phosphor that emits yellow light or orange light. The red LED 103 is a red light emitting LED chip, and may be configured by combining a blue light emitting LED chip and a red phosphor. The white LED 101 and the white LED 102 may have the same color temperature or different color temperatures, but the white light generated by the white LEDs 101 and 102 is set in the range of the color temperature of 1800 to 3300K. This makes it possible to cover the color temperature range of a halogen lamp, which is a conventional light source.

赤色ＬＥＤ１０３が発生する赤色光は、ピーク波長が６６５ｎｍ以上７５０ｎｍ以下に設定されている。この範囲に設定したのは、ピーク波長が６６５ｎｍより低いと光色が大きく変動し、７５０ｎｍより高いと視感度に影響が無くなるためである。 The peak wavelength of the red light generated by the red LED 103 is set to 665 nm or more and 750 nm or less. The reason for setting this range is that when the peak wavelength is lower than 665 nm, the light color fluctuates greatly, and when it is higher than 750 nm, the visual sensitivity is not affected.

回路基板２００は、白色ＬＥＤ１０１，１０２、及び、赤色ＬＥＤ１０３に電力を供給して明るさを制御すると共に、その割合（光束比）を制御する機能を有している。 The circuit board 200 has a function of supplying electric power to the white LEDs 101 and 102 and the red LED 103 to control the brightness and controlling the ratio (luminous flux ratio) thereof.

光束比の範囲については、下記に示すようにして白色ＬＥＤ１０１，１０２の色温度を３パターン選び、さらに赤色ＬＥＤ１０３のピーク波長が６６５ｎｍ、７０５ｎｍ、７４５ｎｍのものを用いてそれぞれ求めた。なお、演色評価法としては、ＣＩＥ方法あるいはＪＩＳ方法を用いている。 The range of the luminous flux ratio was determined by selecting three patterns of color temperatures of the white LEDs 101 and 102 as shown below, and further using the red LEDs 103 having peak wavelengths of 665 nm, 705 nm, and 745 nm, respectively. As the color rendering evaluation method, the CIE method or the JIS method is used.

白色ＬＥＤ１０１，１０２の色温度１６００～１８００Ｋの範囲において、赤色ＬＥＤ１０３の混色点灯時の全光束に対する赤色ＬＥＤ１０３の光束比を０～９．９％まで変化させた時のＲ９の演色評価数を測定した。なお、演色評価数については８０以上を使用可能とする。 In the color temperature range of 1600 to 1800K for the white LEDs 101 and 102, the color rendering index of R9 was measured when the luminous flux ratio of the red LED 103 to the total luminous flux at the time of mixed lighting of the red LED 103 was changed from 0 to 9.9%. .. As for the color rendering index, 80 or more can be used.

Figure 0007067395000001
Figure 0007067395000001

図２から判るように、ピーク波長を６６５ｎｍ、７０５ｎｍ、７４５ｎｍとした赤色ＬＥＤ１０３のいずれの場合も、混色点灯時の全光束に対する赤色ＬＥＤ１０３の光束比が０．８％～９．９％（好ましくは３．４％～９．９％）の場合に演色評価数が８０となる。したがって、混色点灯時の全光束に対する赤色ＬＥＤ１０３の光束比は０．８％～９．９％とする。 As can be seen from FIG. 2, in any case of the red LED 103 having peak wavelengths of 665 nm, 705 nm, and 745 nm, the luminous flux ratio of the red LED 103 to the total luminous flux at the time of mixed color lighting is 0.8% to 9.9% (preferably). In the case of 3.4% to 9.9%), the color rendering index is 80. Therefore, the luminous flux ratio of the red LED 103 to the total luminous flux at the time of mixed color lighting is set to 0.8% to 9.9%.

次に、白色ＬＥＤ１０１，１０２の色温度２４００～２７００Ｋの範囲において、赤色ＬＥＤ１０３の混色点灯時の全光束に対する赤色ＬＥＤ１０３の光束比を０～５．０％まで変化させた時のＲ９の演色評価数を測定した。なお、演色評価数については８０以上を使用可能とする。 Next, the color rendering index of R9 when the luminous flux ratio of the red LED 103 to the total luminous flux at the time of mixed color lighting of the red LED 103 is changed from 0 to 5.0% in the color temperature range of the white LEDs 101 and 102 of 2400 to 2700 K. Was measured. As for the color rendering index, 80 or more can be used.

Figure 0007067395000002
Figure 0007067395000002

図３から判るように、ピーク波長を６６５ｎｍ、７０５ｎｍ、７４５ｎｍとした赤色ＬＥＤ１０３のいずれの場合も、混色点灯時の全光束に対する赤色ＬＥＤ１０３の光束比が０．８％～９．９％（好ましくは１．１％～４．４％）の場合に演色評価数が８０となる。したがって、混色点灯時の全光束に対する赤色ＬＥＤ１０３の光束比は０．８％～９．９％とする。 As can be seen from FIG. 3, in any case of the red LED 103 having peak wavelengths of 665 nm, 705 nm, and 745 nm, the luminous flux ratio of the red LED 103 to the total luminous flux at the time of mixed color lighting is 0.8% to 9.9% (preferably). In the case of 1.1% to 4.4%), the color rendering index is 80. Therefore, the luminous flux ratio of the red LED 103 to the total luminous flux at the time of mixed color lighting is set to 0.8% to 9.9%.

次に、白色ＬＥＤ１０１，１０２の色温度３０００～３３００Ｋの範囲において、赤色ＬＥＤ１０３の混色点灯時の全光束に対する赤色ＬＥＤ１０３の光束比を０～９．９％まで変化させた時のＲ９の演色評価数を測定した。なお、演色評価数については８０以上を使用可能とする。 Next, in the color temperature range of the white LEDs 101 and 102 in the range of 3000 to 3300K, the color rendering index of R9 when the luminous flux ratio of the red LED 103 to the total luminous flux at the time of mixed lighting of the red LED 103 is changed from 0 to 9.9%. Was measured. As for the color rendering index, 80 or more can be used.

Figure 0007067395000003
Figure 0007067395000003

図４から判るように、ピーク波長を６６５ｎｍ、７０５ｎｍ、７４５ｎｍとした赤色ＬＥＤ１０３のいずれの場合も、混色点灯時の全光束に対する赤色ＬＥＤ１０３の光束比が０．８％～９．９％（好ましくは０．８％～３．６％）の場合に演色評価数が８０となる。したがって、混色点灯時の全光束に対する赤色ＬＥＤ１０３の光束比は０．８％～９．９％とする。 As can be seen from FIG. 4, in any case of the red LED 103 having peak wavelengths of 665 nm, 705 nm, and 745 nm, the luminous flux ratio of the red LED 103 to the total luminous flux at the time of mixed color lighting is 0.8% to 9.9% (preferably). In the case of 0.8% to 3.6%), the color rendering index is 80. Therefore, the luminous flux ratio of the red LED 103 to the total luminous flux at the time of mixed color lighting is set to 0.8% to 9.9%.

このように構成される実施形態の照明装置１０においては、光源部１００に、色温度１６００～３３００Ｋの白色ＬＥＤ１０１，１０２、ピーク波長が６６５ｎｍ、７０５ｎｍ又は７４５ｎｍの赤色ＬＥＤ１０３のものを用いた。また、白色ＬＥＤ１０１，１０２及び赤色ＬＥＤ１０３の混色点灯時の全光束に対する赤色ＬＥＤ１０３の光束比を０．８％～９．９％とした。そうすることにより、Ｒ９の演色評価数８０以上とすることができる。したがって、十分なＲ９について演色評価数が得られ、肌色の見え方が良好となる。したがって、ハロゲンランプと同等の高い演色性が得られ、人物が照明対象の中心となる撮影スタジオや舞台の照明に適した照明装置が得られる。 In the lighting device 10 of the embodiment configured as described above, a white LED 101, 102 having a color temperature of 1600 to 3300 K and a red LED 103 having a peak wavelength of 665 nm, 705 nm, or 745 nm were used as the light source unit 100. Further, the luminous flux ratio of the red LED 103 to the total luminous flux at the time of mixed color lighting of the white LEDs 101 and 102 and the red LED 103 was set to 0.8% to 9.9%. By doing so, the color rendering index of R9 can be 80 or more. Therefore, a color rendering index is obtained for a sufficient R9, and the appearance of the skin color is good. Therefore, a high color rendering property equivalent to that of a halogen lamp can be obtained, and a lighting device suitable for lighting a photography studio or a stage where a person is the center of the illumination target can be obtained.

本発明の実施形態を説明したが、この実施形態は、例として提示したものであり、発明の範囲を限定することは意図していない。この新規な実施形態は、その他の様々な形態で実施されることが可能であり、発明の要旨を逸脱しない範囲で、種々の省略、置き換え、変更を行うことができる。この実施形態やその変形は、発明の範囲や要旨に含まれるとともに、特許請求の範囲に記載された発明とその均等の範囲に含まれる。 Although embodiments of the present invention have been described, these embodiments are presented as examples and are not intended to limit the scope of the invention. This novel embodiment can be implemented in various other embodiments, and various omissions, replacements, and changes can be made without departing from the gist of the invention. This embodiment and its modifications are included in the scope and gist of the invention, and are also included in the scope of the invention described in the claims and the equivalent scope thereof.

なお、上述した白色ＬＥＤは２つの白色ＬＥＤを用いたが１つでも良く、また３つ以上用いてもよい。赤色ＬＥＤは１つの赤色ＬＥＤを用いたが、複数用いても良く、上述したピーク波長の範囲内のものであれば、異なるピーク波長を有するものでも、同じピーク波長を有するものであっても良い。 As the white LED described above, two white LEDs are used, but one may be used, and three or more may be used. Although one red LED is used, a plurality of red LEDs may be used, and may have different peak wavelengths or the same peak wavelength as long as they are within the above-mentioned peak wavelength range. ..

１０…照明装置、２０…装置本体、２１…筐体、１００…光源部、１０１…白色ＬＥＤ，１０２、１０３…赤色ＬＥＤ、２００…回路基板。 10 ... lighting device, 20 ... device body, 21 ... housing, 100 ... light source unit, 101 ... white LED, 102, 103 ... red LED, 200 ... circuit board.

Claims (4)

色温度１６００～３３００Ｋの白色光を発する白色ＬＥＤと；
ピーク波長が６６５ｎｍ以上７５０ｎｍ以下の赤色ＬＥＤと；を有し、
前記白色ＬＥＤ及び前記赤色ＬＥＤの混色点灯時の全光束に対する前記赤色ＬＥＤの光束比が０．８％～９．９％であり、特殊演色評価数値Ｒ９が８０以上である、
照明装置。 With a white LED that emits white light with a color temperature of 1600 to 3300K;
With a red LED with a peak wavelength of 665 nm or more and 750 nm or less;
The luminous flux ratio of the red LED to the total luminous flux when the white LED and the red LED are mixed and lit is 0.8% to 9.9%, and the special color play evaluation value R9 is 80 or more.
Lighting equipment. 色温度１６００～１８００Ｋの白色光を発する白色ＬＥＤと；
ピーク波長が６６５ｎｍ以上７５０ｎｍ以下の赤色ＬＥＤと；を有し、
前記白色ＬＥＤ及び前記赤色ＬＥＤの混色点灯時の全光束に対する前記赤色ＬＥＤの光束比が３．４％～９．９％である、
照明装置。 With a white LED that emits white light with a color temperature of 1600 to 1800K;
With a red LED with a peak wavelength of 665 nm or more and 750 nm or less;
The luminous flux ratio of the red LED to the total luminous flux when the white LED and the red LED are mixed and lit is 3.4% to 9.9%.
Lighting equipment. 色温度２４００～２７００Ｋの白色光を発する白色ＬＥＤと；
ピーク波長が６６５ｎｍ以上７５０ｎｍ以下の赤色ＬＥＤと；を有し、
前記白色ＬＥＤ及び前記赤色ＬＥＤの混色点灯時の全光束に対する前記赤色ＬＥＤの光束比が１．１％～４．４％である、
照明装置。 With a white LED that emits white light with a color temperature of 2400 to 2700K;
With a red LED with a peak wavelength of 665 nm or more and 750 nm or less;
The luminous flux ratio of the red LED to the total luminous flux at the time of mixed lighting of the white LED and the red LED is 1.1% to 4.4%.
Lighting equipment. 色温度３０００～３３００Ｋの白色光を発する白色ＬＥＤと；
ピーク波長が６６５ｎｍ以上７５０ｎｍ以下の赤色ＬＥＤと；を有し、
前記白色ＬＥＤ及び前記赤色ＬＥＤの混色点灯時の全光束に対する前記赤色ＬＥＤの光束比が０．８％～３．６％である、
照明装置。 With a white LED that emits white light with a color temperature of 3000 to 3300K;
With a red LED with a peak wavelength of 665 nm or more and 750 nm or less;
The luminous flux ratio of the red LED to the total luminous flux at the time of mixed lighting of the white LED and the red LED is 0.8% to 3.6%.
Lighting equipment.
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JP2015138809A (en) 2014-01-20 2015-07-30 パナソニックＩｐマネジメント株式会社 Light-emitting device, light source for illumination and luminaire
JP2015154895A (en) 2014-02-21 2015-08-27 オリンパス株式会社 surgical manipulator operating device and surgical manipulator system

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JP2010147306A (en) 2008-12-19 2010-07-01 Mitsubishi Electric Corp Light emitting device, and lighting fixture and display instrument using the light emitting device
US20150092407A1 (en) 2013-09-27 2015-04-02 Genius Electronic Optical Co., Ltd. High color rendering lamp
JP2015138809A (en) 2014-01-20 2015-07-30 パナソニックＩｐマネジメント株式会社 Light-emitting device, light source for illumination and luminaire
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