JP2016162857A - Illumination device - Google Patents

Illumination device Download PDF

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JP2016162857A
JP2016162857A JP2015039338A JP2015039338A JP2016162857A JP 2016162857 A JP2016162857 A JP 2016162857A JP 2015039338 A JP2015039338 A JP 2015039338A JP 2015039338 A JP2015039338 A JP 2015039338A JP 2016162857 A JP2016162857 A JP 2016162857A
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wavelength
peak
light
intensity
less
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喜子 高橋
Yoshiko Takahashi
喜子 高橋
朋子 石渡
Tomoko Ishiwatari
朋子 石渡
洋邦 東
Hirokuni Azuma
洋邦 東
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Toshiba Lighting and Technology Corp
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Toshiba Lighting and Technology Corp
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L2224/00—Indexing scheme for arrangements for connecting or disconnecting semiconductor or solid-state bodies and methods related thereto as covered by H01L24/00
    • H01L2224/01—Means for bonding being attached to, or being formed on, the surface to be connected, e.g. chip-to-package, die-attach, "first-level" interconnects; Manufacturing methods related thereto
    • H01L2224/42—Wire connectors; Manufacturing methods related thereto
    • H01L2224/47—Structure, shape, material or disposition of the wire connectors after the connecting process
    • H01L2224/48—Structure, shape, material or disposition of the wire connectors after the connecting process of an individual wire connector
    • H01L2224/481—Disposition
    • H01L2224/48135—Connecting between different semiconductor or solid-state bodies, i.e. chip-to-chip
    • H01L2224/48137—Connecting between different semiconductor or solid-state bodies, i.e. chip-to-chip the bodies being arranged next to each other, e.g. on a common substrate
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L2224/00—Indexing scheme for arrangements for connecting or disconnecting semiconductor or solid-state bodies and methods related thereto as covered by H01L24/00
    • H01L2224/01—Means for bonding being attached to, or being formed on, the surface to be connected, e.g. chip-to-package, die-attach, "first-level" interconnects; Manufacturing methods related thereto
    • H01L2224/42—Wire connectors; Manufacturing methods related thereto
    • H01L2224/47—Structure, shape, material or disposition of the wire connectors after the connecting process
    • H01L2224/49—Structure, shape, material or disposition of the wire connectors after the connecting process of a plurality of wire connectors
    • H01L2224/491—Disposition
    • H01L2224/49105—Connecting at different heights
    • H01L2224/49107—Connecting at different heights on the semiconductor or solid-state body
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L2924/00—Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
    • H01L2924/15—Details of package parts other than the semiconductor or other solid state devices to be connected
    • H01L2924/181—Encapsulation

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Abstract

PROBLEM TO BE SOLVED: To provide an illumination device capable of more naturally perceiving an object.SOLUTION: According to an embodiment, there is provided an illumination device including a light-emitting element for emitting first light and a wavelength conversion layer which emits second light having a wavelength different from the wavelength of the first light and on which at least a part of the first light is made incident. Emission light including the at least a part of the first light and the second light includes a first peak, a second peak, and a bottom. A first peak wavelength of the first peak is from 610 nm to 650 nm. A second peak wavelength of the second peak is from 440 nm to 480 nm. A bottom wavelength of the bottom is between the first peak wavelength and the second peak wavelength. A second intensity of the second peak is 50% to 90% of a first intensity of the first peak. An intensity of emission light in a 680-nm wavelength is 55% to 65% of the first intensity. A color temperature of emission light is from 2500 K to 3300 K. Chromaticity deviation of emission light is from -0.020 to -0.004.SELECTED DRAWING: Figure 1

Description

本発明の実施形態は、照明装置に関する。   Embodiments described herein relate generally to a lighting device.

例えば、青色光を発光する半導体発光素子と、光の波長を変換する蛍光体と、を組み合わせて白色光を発光する照明装置がある。このような照明装置からの照明光が商品などの照明対象物に照射される。商品などの色がより自然に知覚されることが望まれる。   For example, there is an illumination device that emits white light by combining a semiconductor light emitting element that emits blue light and a phosphor that converts the wavelength of light. Illumination light from such an illuminating device is applied to an illumination object such as a product. It is desired that the color of products and the like be perceived more naturally.

特開２０１３−２５８０３７号公報JP 2013-258037 A

本発明の実施形態は、より自然に対象物を知覚できる照明装置を提供する。   Embodiment of this invention provides the illuminating device which can perceive an object more naturally.

本発明の実施形態によれば、第１光を放出する発光素子と、前記第１光の少なくとも一部が入射し前記第１光の波長とは異なる第２光を放出する波長変換層と、を含む照明装置が提供される。前記第１光の少なくとも一部と前記第２光とを含む出射光は、第１ピークと第２ピークとボトムとを有する。前記第１ピークの第１ピーク波長は、６１０ｎｍ以上６５０ｎｍ以下である。前記第２ピークの第２ピーク波長は、４４０ｎｍ以上４８０ｎｍ以下である。前記ボトムのボトム波長は、前記第１ピーク波長と前記第２ピーク波長との間にある。前記第２ピークの第２強度は、前記第１ピークの第１強度の５０％以上９０％以下である。６８０ｎｍの波長における前記出射光の強度は、前記第１強度の５５％以上６５％以下である。前記出射光の色温度は、２５００Ｋ以上３３００Ｋ以下である。前記出射光の色度偏差は、−０．０２０以上−０．００４以下である。   According to an embodiment of the present invention, a light emitting device that emits first light, a wavelength conversion layer that emits at least part of the first light and emits second light different from the wavelength of the first light, A lighting device is provided. The outgoing light including at least a part of the first light and the second light has a first peak, a second peak, and a bottom. The first peak wavelength of the first peak is not less than 610 nm and not more than 650 nm. The second peak wavelength of the second peak is not less than 440 nm and not more than 480 nm. The bottom wavelength of the bottom is between the first peak wavelength and the second peak wavelength. The second intensity of the second peak is not less than 50% and not more than 90% of the first intensity of the first peak. The intensity of the emitted light at a wavelength of 680 nm is 55% to 65% of the first intensity. The color temperature of the emitted light is not less than 2500K and not more than 3300K. The chromaticity deviation of the emitted light is −0.020 or more and −0.004 or less.

本発明の実施形態によれば、より自然に対象物を知覚できる照明装置が提供される。   According to the embodiment of the present invention, an illumination device that can perceive an object more naturally is provided.

実施形態に係る照明装置の特性を例示するグラフ図である。It is a graph which illustrates the characteristic of the illuminating device which concerns on embodiment. 実施形態に係る照明装置を例示する模式的断面図である。It is typical sectional drawing which illustrates the illuminating device which concerns on embodiment. 照明装置の試料を示す表である。It is a table | surface which shows the sample of an illuminating device. 照明装置の試料の特性を示すグラフ図である。It is a graph which shows the characteristic of the sample of an illuminating device. 照明装置の試料の特性を示す図である。It is a figure which shows the characteristic of the sample of an illuminating device. 照明装置の試料の知覚試験の結果を示すグラフ図である。It is a graph which shows the result of the sensory test of the sample of an illuminating device. 照明装置の試料の知覚試験の結果を示すグラフ図である。It is a graph which shows the result of the sensory test of the sample of an illuminating device.

以下に、本発明の各実施の形態について図面を参照しつつ説明する。
なお、図面は模式的または概念的なものであり、各部分の厚みと幅との関係、部分間の大きさの比率などは、必ずしも現実のものと同一とは限らない。また、同じ部分を表す場合であっても、図面により互いの寸法や比率が異なって表される場合もある。
なお、本願明細書と各図において、既出の図に関して前述したものと同様の要素には同一の符号を付して詳細な説明は適宜省略する。 Embodiments of the present invention will be described below with reference to the drawings.
The drawings are schematic or conceptual, and the relationship between the thickness and width of each part, the size ratio between the parts, and the like are not necessarily the same as actual ones. Further, even when the same part is represented, the dimensions and ratios may be represented differently depending on the drawings.
Note that, in the present specification and each drawing, the same elements as those described above with reference to the previous drawings are denoted by the same reference numerals, and detailed description thereof is omitted as appropriate.

図１は、実施形態に係る照明装置の特性を例示するグラフ図である。
図２は、実施形態に係る照明装置を例示する模式的断面図である。
図２に示すように、実施形態に係る照明装置１１０は、発光素子５０と、波長変換層４０と、を含む。 FIG. 1 is a graph illustrating characteristics of the lighting device according to the embodiment.
FIG. 2 is a schematic cross-sectional view illustrating the lighting device according to the embodiment.
As illustrated in FIG. 2, the illumination device 110 according to the embodiment includes a light emitting element 50 and a wavelength conversion layer 40.

発光素子５０は、第１光を出射する。この例では、複数の発光素子５０（第１発光素子５０ａ及び第２発光素子５０ｂなど）が設けられている。発光素子５０は、例えば、ｎ形の第１半導体層１１と、ｐ形の第２半導体層１２と、第１半導体層１１及び第２半導体層１２との間に設けられた第３半導体層１３（発光層）と、を含む。これらの半導体層には、例えば、窒化物半導体が用いられる。これらの半導体層は、例えば、基板１６の上に設けられる。   The light emitting element 50 emits the first light. In this example, a plurality of light emitting elements 50 (first light emitting element 50a, second light emitting element 50b, and the like) are provided. The light emitting element 50 includes, for example, an n-type first semiconductor layer 11, a p-type second semiconductor layer 12, and a third semiconductor layer 13 provided between the first semiconductor layer 11 and the second semiconductor layer 12. (Light emitting layer). For example, a nitride semiconductor is used for these semiconductor layers. These semiconductor layers are provided on the substrate 16, for example.

発光素子５０において、第１電極１１ｅと第２電極１２ｅとが設けられている。第１電極１１ｅは、第１半導体層１１に電気的に接続される。第２電極１２ｅは、第２半導体層１２に電気的に接続される。この例では、複数の発光素子５０が直列に接続されている。 例えば、実装基板５０ｓの上に複数の発光素子５０が配置される。実装基板の電極５１ｅなどに、発光素子５０の電極が電気的に接続される。第１電極１１ｅと第２電極１２ｅとの間に電圧が印加され、発光素子５０から光（第１光）が放出される。第１光は、青色である。第１光のピーク波長は、例えば、４４０ｎｍ（ナノメートトル）以上４８０ｎｍ以下である。   In the light emitting element 50, a first electrode 11e and a second electrode 12e are provided. The first electrode 11 e is electrically connected to the first semiconductor layer 11. The second electrode 12 e is electrically connected to the second semiconductor layer 12. In this example, a plurality of light emitting elements 50 are connected in series. For example, the plurality of light emitting elements 50 are arranged on the mounting substrate 50s. The electrode of the light emitting element 50 is electrically connected to the electrode 51e of the mounting substrate. A voltage is applied between the first electrode 11e and the second electrode 12e, and light (first light) is emitted from the light emitting element 50. The first light is blue. The peak wavelength of the first light is, for example, not less than 440 nm (nanometer) and not more than 480 nm.

波長変換層４０には、第１光の少なくとも一部が入射する。波長変換層４０は、第１光の波長とは異なる第２光を放出する。例えば、第２光は、緑色、黄色及び赤色の少なくともいずれかの成分を有する。   At least a part of the first light is incident on the wavelength conversion layer 40. The wavelength conversion layer 40 emits second light different from the wavelength of the first light. For example, the second light has at least one component of green, yellow, and red.

波長変換層４０は、例えば、複数の蛍光体４１と、複数の蛍光体４１の周りに設けられた光透過層４２と、を含む。光透過層４２には、例えばシリコーン樹脂などが用いられる。   The wavelength conversion layer 40 includes, for example, a plurality of phosphors 41 and a light transmission layer 42 provided around the plurality of phosphors 41. For example, a silicone resin is used for the light transmission layer 42.

発光素子５０から出射する出射光は、第１光の少なくとも一部と、第２光と、を含む。出射光は、黄色系の白色である。発光素子５０の出射光は、例えば、「電球色」系の白色光である。   The outgoing light emitted from the light emitting element 50 includes at least a part of the first light and the second light. The emitted light is yellowish white. The light emitted from the light emitting element 50 is, for example, “bulb color” white light.

図２は、発光素子５０の出射光のスペクトルを例示している。図２の横軸は、波長λ（ｎｍ）である。縦軸は、発光の強度Ｉｎｔ（相対値）である。強度Ｉｎｔは、後述する第１強度Ｉｎｔ１を１としている。   FIG. 2 illustrates the spectrum of the emitted light from the light emitting element 50. The horizontal axis in FIG. 2 is the wavelength λ (nm). The vertical axis represents the emission intensity Int (relative value). The intensity Int is 1 as a first intensity Int1 described later.

図２に示すように、出射光（第１光と第２光とを含む光）は、第１ピークＰｋ１と、第２ピークＰｋ２と、ボトムＢｔと、を有する。   As shown in FIG. 2, the outgoing light (light including the first light and the second light) has a first peak Pk1, a second peak Pk2, and a bottom Bt.

第１ピークＰｋ１の第１ピーク波長λ１は、６１０ｎｍ以上６５０ｎｍ以下である。この例では、第１ピーク波長λ１は、６２５ｎｍ以上６３５ｎｍ以下（例えば約６３０ｎｍ）である。   The first peak wavelength λ1 of the first peak Pk1 is not less than 610 nm and not more than 650 nm. In this example, the first peak wavelength λ1 is not less than 625 nm and not more than 635 nm (for example, about 630 nm).

第２ピークＰｋ２の第２ピーク波長λ２は、４４０ｎｍ以上４８０ｎｍ以下である。この例では、第２ピーク波長λ２は、４５０ｎｍ以上４６０ｎｍ以下（例えば約４５５ｎｍ）である。   The second peak wavelength λ2 of the second peak Pk2 is not less than 440 nm and not more than 480 nm. In this example, the second peak wavelength λ2 is not less than 450 nm and not more than 460 nm (for example, about 455 nm).

ボトムＢｔのボトム波長λ３は、第１ピーク波長λ１と第２ピーク波長λ２との間にある。この例では、ボトム波長λ３は、４８５ｎｍ以上４９５ｎｍ以下（例えば約４９０ｎｍ）である。   The bottom wavelength λ3 of the bottom Bt is between the first peak wavelength λ1 and the second peak wavelength λ2. In this example, the bottom wavelength λ3 is not less than 485 nm and not more than 495 nm (for example, about 490 nm).

第２ピークＰｋ２の第２強度Ｉｎｔ２は、第１ピークＰｋ１の第１強度Ｉｎｔ１の５０％以上９０％以下である。この例では、第２強度Ｉｎｔ２は、第１強度Ｉｎｔ１の６５％以上７５％以下（例えば約７０％）である。   The second intensity Int2 of the second peak Pk2 is not less than 50% and not more than 90% of the first intensity Int1 of the first peak Pk1. In this example, the second intensity Int2 is 65% or more and 75% or less (for example, about 70%) of the first intensity Int1.

ボトムＢｔの第３強度Ｉｎｔ３は、第１強度Ｉｎｔ１の２５％以上３５％以下である。この例では、第３強度Ｉｎｔ３は、第１強度Ｉｎｔ１の２７％以上２９％以下（例えば、約２８％）である。   The third intensity Int3 of the bottom Bt is 25% or more and 35% or less of the first intensity Int1. In this example, the third intensity Int3 is not less than 27% and not more than 29% (for example, about 28%) of the first intensity Int1.

６８０ｎｍの波長λにおける出射光の強度は、第１強度Ｉｎｔ１の５５％以上６５％以下である。この例では、６８０ｎｍの波長λにおける出射光の強度は、第１強度Ｉｎｔ１の６１％以上６３％以下（例えば、約６２％）である。   The intensity of the emitted light at the wavelength λ of 680 nm is 55% or more and 65% or less of the first intensity Int1. In this example, the intensity of the emitted light at the wavelength λ of 680 nm is 61% or more and 63% or less (for example, about 62%) of the first intensity Int1.

５５０ｎｍの波長λにおける出射光の強度は、第１強度Ｉｎｔ１の５５％以上６５％以下である。この例では、５５０ｎｍの波長λにおける出射光の強度は、第１強度Ｉｎｔ１の５８％以上６２％以下（例えば約６０％）である。   The intensity of the emitted light at the wavelength λ of 550 nm is 55% or more and 65% or less of the first intensity Int1. In this example, the intensity of the emitted light at the wavelength λ of 550 nm is 58% or more and 62% or less (for example, about 60%) of the first intensity Int1.

例えば、５５０ｎｍの波長λにおける出射光の強度は、６８０ｎｍの波長λにおける出射光の強度の０．９倍以上１．１倍以下である。例えば、５５０ｎｍの波長λにおける出射光の強度は、６８０ｎｍの波長λにおける出射光の強度の０．９５倍以上１．０５倍以下でも良い。   For example, the intensity of the emitted light at the wavelength λ of 550 nm is 0.9 to 1.1 times the intensity of the emitted light at the wavelength λ of 680 nm. For example, the intensity of the emitted light at the wavelength λ of 550 nm may be 0.95 times to 1.05 times the intensity of the emitted light at the wavelength λ of 680 nm.

第２ピーク波長λ２とボトム波長λ３との間の波長λの上昇において、出射光の強度Ｉｎｔは、単調に減少する。ボトム波長λ３と第１ピーク波長λ１との間の波長λの上昇において、出射光の強度Ｉｎｔは、単調に上昇する。   As the wavelength λ increases between the second peak wavelength λ2 and the bottom wavelength λ3, the intensity Int of the emitted light decreases monotonously. As the wavelength λ increases between the bottom wavelength λ3 and the first peak wavelength λ1, the intensity Int of the emitted light increases monotonously.

例えば、４００ｎｍと第２ピーク波長λ２との間の波長λの上昇において、出射光の強度Ｉｎｔは、単調に上昇する。例えば、第１ピーク波長λ１と７３０ｎｍの間の波長λの上昇において、出射光の強度Ｉｎｔは、単調に減少する。   For example, when the wavelength λ increases between 400 nm and the second peak wavelength λ2, the intensity Int of the emitted light increases monotonously. For example, when the wavelength λ increases between the first peak wavelength λ1 and 730 nm, the intensity Int of the emitted light monotonously decreases.

このように、照明装置１１０の出射光は、実質的に２つのピークと１つのボトムとを有する。   Thus, the emitted light of the illumination device 110 has substantially two peaks and one bottom.

そして、出射光の色温度は、２５００Ｋ以上３３００Ｋ以下である。出射光の色度偏差は、−０．０２０以上−０．００４以下である。   And the color temperature of emitted light is 2500 K or more and 3300 K or less. The chromaticity deviation of the emitted light is −0.020 or more and −0.004 or less.

このような照明装置１１０によれば、より自然に対象物を知覚できる照明装置を提供できる。   According to such an illuminating device 110, the illuminating device which can perceive an object more naturally can be provided.

以下、各種の照明装置の評価結果の例について説明する。
図３は、照明装置の試料を示す表である。
図３に示すように、第１〜第７試料ＳＰＬ１〜ＳＰＬ７が用意された。これらの試料において、同じ発光素子５０が用いられている。そして、波長変換層４０の構成が、これらの試料において異なっている。第１〜第７試料ＳＰＬ１〜ＳＰＬ７においては、同じ蛍光体４１が用いられる。そして、波長変換層４０中における蛍光体４１の濃度が変更される。すなわち、濃度は、第１〜第７試料ＳＰＬ１〜ＳＰＬ７の順に高くなる。 Hereinafter, examples of evaluation results of various lighting devices will be described.
FIG. 3 is a table showing a sample of the lighting device.
As shown in FIG. 3, first to seventh samples SPL1 to SPL7 were prepared. In these samples, the same light emitting element 50 is used. And the structure of the wavelength conversion layer 40 differs in these samples. In the first to seventh samples SPL1 to SPL7, the same phosphor 41 is used. Then, the concentration of the phosphor 41 in the wavelength conversion layer 40 is changed. That is, the concentration increases in the order of the first to seventh samples SPL1 to SPL7.

図３中には、これらの試料における、第２ピーク強度比Ｐｈ２が示されている。第２ピーク強度比Ｐｈ２は、第２ピークＰｋ２の第２強度Ｉｎｔ２の、第１ピークＰｋ１の第１強度Ｉｎｔ１に対する比（Ｉｎｔ２／Ｉｎｔ１）である。   FIG. 3 shows the second peak intensity ratio Ph2 in these samples. The second peak intensity ratio Ph2 is a ratio (Int2 / Int1) of the second intensity Int2 of the second peak Pk2 to the first intensity Int1 of the first peak Pk1.

図３中には、これらの試料における色温度ＣＴ（Ｋ）と、色度偏差ｄｕｖと、ｕ’と、ｖ’と、特殊演色評価数Ｒ９と、が示されている。ｕ’及びｖ’は、ｕ’ｖ’色度図におけるｕ’値及びｖ’値である。特殊演色評価数Ｒ９は、JIS Z 8726:1990（光源の演色性評価方法）に記載されている。 FIG. 3 shows the color temperature CT (K), chromaticity deviation duv, u ′, v ′, and special color rendering index R 9 for these samples. u ′ and v ′ are the u ′ value and the v ′ value in the u′v ′ chromaticity diagram. Special color rendering index R 9 is, JIS Z 8726: described in 1990 (color rendering index method of the light source).

図４は、照明装置の試料の特性を示すグラフ図である。
図４は、各試料の発光スペクトルを例示している。図４において、横軸は、波長λ（ｎｍ）である。縦軸は、出射光の強度Ｉｎｔである。強度Ｉｎｔは、各試料における第１ピーク強度Ｉｎｔ１のそれぞれを１としている。 FIG. 4 is a graph showing the characteristics of the sample of the illumination device.
FIG. 4 illustrates the emission spectrum of each sample. In FIG. 4, the horizontal axis represents the wavelength λ (nm). The vertical axis represents the intensity Int of the emitted light. The intensity Int is 1 for each first peak intensity Int1 in each sample.

図４に示すように、第１〜第７試料ＳＰＬ１〜ＳＰＬ７において、この順で、第２ピーク波長λ２における強度Ｉｎｔが高くなる。第１〜第７試料ＳＰＬ１〜ＳＰＬ７において、ボトム波長λ３における強度Ｉｎｔは大きくは変化しない。   As shown in FIG. 4, in the first to seventh samples SPL1 to SPL7, the intensity Int at the second peak wavelength λ2 increases in this order. In the first to seventh samples SPL1 to SPL7, the intensity Int at the bottom wavelength λ3 does not change greatly.

第１〜第７試料ＳＰＬ１〜ＳＰＬ７において、６８０ｎｍの波長λにおける出射光の強度は、第１強度Ｉｎｔ１の５５％以上６５％以下である。   In the first to seventh samples SPL1 to SPL7, the intensity of the emitted light at the wavelength λ of 680 nm is 55% or more and 65% or less of the first intensity Int1.

図５は、照明装置の試料の特性を示す図である。
図５は、ｕ’ｖ’色度図である。図５中には、白色の基準となる光源の色度Ｌｓも示している。白色の基準となる光源は、JIS Z 8105:2000に記載されている。
図５に示すように、第１〜第７試料ＳＰＬ１〜ＳＰＬ７において、この順で、白色の基準となる光源の色度Ｌｓからの距離が近くなる。 FIG. 5 is a diagram illustrating the characteristics of the sample of the illumination device.
FIG. 5 is a u′v ′ chromaticity diagram. FIG. 5 also shows the chromaticity Ls of the light source serving as a white reference. The light source used as a white reference is described in JIS Z 8105: 2000.
As shown in FIG. 5, in the first to seventh samples SPL <b> 1 to SPL <b> 7, the distance from the chromaticity Ls of the light source serving as the white reference becomes shorter in this order.

以下、これらの試料についての知覚評価の結果について説明する。
以下の第１評価においては、白いシャツを見たときにどのような色に知覚されるかが試験される。被検者は、１０人である。評価においては、第１評価パラメータが用いられる。「黄色に知覚される」とき、第１評価パラメータの値は、「５」である。「黄みの白に知覚される」とき、第１評価パラメータの値は、「４」である。「白に知覚される」とき、第１評価パラメータの値は、「３」である。「ピンクみの白に知覚され」とき、第１評価パラメータの値は、「２」である。「ピンクに知覚される」とき、第１評価パラメータの値は、「１」である。評価においては、ハロゲン電球ＳＰＬ０も参考例として評価された。ハロゲン電球ＳＰＬ０は、「電球色」の色特性を有する。 Hereinafter, the results of perceptual evaluation for these samples will be described.
In the following first evaluation, what color is perceived when looking at a white shirt is tested. There are 10 subjects. In the evaluation, the first evaluation parameter is used. When “perceived in yellow”, the value of the first evaluation parameter is “5”. When “perceived as yellowish white”, the value of the first evaluation parameter is “4”. When “perceived as white”, the value of the first evaluation parameter is “3”. When “perceived as pinkish white”, the value of the first evaluation parameter is “2”. When “perceived in pink”, the value of the first evaluation parameter is “1”. In the evaluation, the halogen bulb SPL0 was also evaluated as a reference example. The halogen bulb SPL0 has a color characteristic of “bulb color”.

図６は、照明装置の試料の知覚試験の結果を示すグラフ図である。
図６は、第１評価の結果を示している。横軸は、第２ピーク強度比Ｐｈ２（すなわち、Ｉｎｔ２／Ｉｎｔ１）である。４０％〜１００％の第２ピーク強度比Ｐｈ２のそれぞれは、第１〜第７試料ＳＰＬ１〜ＳＰＬ７のそれぞれに対応する。縦軸は、第１評価値ＥＶ１である。第１評価値ＥＶ１は、評価で得られた第１評価パラメータの値の平均値である。 FIG. 6 is a graph showing a result of a sensory test of a sample of the lighting device.
FIG. 6 shows the result of the first evaluation. The horizontal axis represents the second peak intensity ratio Ph2 (that is, Int2 / Int1). Each of the second peak intensity ratios Ph2 of 40% to 100% corresponds to each of the first to seventh samples SPL1 to SPL7. The vertical axis is the first evaluation value EV1. The first evaluation value EV1 is an average value of the values of the first evaluation parameters obtained by the evaluation.

図６に示すように、ハロゲン電球ＳＰＬ０においては、第１評価値ＥＶ１は５である。第２ピーク強度比Ｐｈ２が、上昇すると、第１評価値ＥＶ１は低下する。すなわち、第２ピーク強度比Ｐｈ２が上昇すると、白いシャツを見たときの知覚される色は、「黄色」から「白」を経て「ピンク色」となる。   As shown in FIG. 6, in the halogen bulb SPL0, the first evaluation value EV1 is 5. When the second peak intensity ratio Ph2 increases, the first evaluation value EV1 decreases. That is, when the second peak intensity ratio Ph2 increases, the perceived color when viewing a white shirt changes from “yellow” to “white” to “pink”.

以下の第２評価においては、被検者が試料（照明装置）のそれぞれを見たときにどのように知覚されるが評価された。この第２評価においては、第２評価パラメータが用いられる。「電球色と同等に知覚される」とき、第２評価パラメータの値は、「３」である。「やや違和感を感じる」とき、第２評価パラメータの値は、「２」である。「違和感を感じる」とき、第２評価パラメータの値は、「１」である。   In the following second evaluation, how the subject perceived when looking at each of the samples (lighting devices) was evaluated. In the second evaluation, the second evaluation parameter is used. The value of the second evaluation parameter is “3” when “perceived equivalent to the color of the bulb”. When “slightly uncomfortable”, the value of the second evaluation parameter is “2”. When “feeling uncomfortable”, the value of the second evaluation parameter is “1”.

図６から、第２ピーク強度比Ｐｈ２が４０％のときは、白いシャツ（白い対象物）は、黄色に知覚されることが分かる。第２ピーク強度比Ｐｈ２が５０％以上９０％以下のときに、白いシャツ（白い対象物）は、白に知覚される、または、ピンクみの白に知覚され、すなわち、白に近いと知覚されることが分かる。第２ピーク強度比Ｐｈ２が６０％以上８０％以下のときに、白いシャツ（白い対象物）は、実質的に白に知覚されることが分かる。   From FIG. 6, it can be seen that when the second peak intensity ratio Ph2 is 40%, the white shirt (white object) is perceived as yellow. When the second peak intensity ratio Ph2 is 50% or more and 90% or less, the white shirt (white object) is perceived as white or perceived as pinkish white, that is, perceived as close to white. I understand that It can be seen that when the second peak intensity ratio Ph2 is 60% or more and 80% or less, the white shirt (white object) is perceived as substantially white.

図７は、照明装置の試料の知覚試験の結果を示すグラフ図である。
図７は、第２評価の結果を示している。横軸は、第２ピーク強度比Ｐｈ２（すなわち、Ｉｎｔ２／Ｉｎｔ１）である。４０％〜１００％の第２ピーク強度比Ｐｈ２のそれぞれは、第１〜第７試料ＳＰＬ１〜ＳＰＬ７のそれぞれに対応する。縦軸は、第２評価値ＥＶ２である。第２評価値ＥＶ２は、評価で得られた第２評価パラメータの値の平均値である。 FIG. 7 is a graph showing the result of a sensory test on a sample of the lighting device.
FIG. 7 shows the result of the second evaluation. The horizontal axis represents the second peak intensity ratio Ph2 (that is, Int2 / Int1). Each of the second peak intensity ratios Ph2 of 40% to 100% corresponds to each of the first to seventh samples SPL1 to SPL7. The vertical axis is the second evaluation value EV2. The second evaluation value EV2 is an average value of the values of the second evaluation parameters obtained by the evaluation.

図７に示すように、ハロゲン電球ＳＰＬ０においては、第２評価値ＥＶ２は５である。すなわち、ハロゲン電球は、電球色と同等に知覚される。第２ピーク強度比Ｐｈ２が、上昇すると、第２評価値ＥＶ２は低下する。すなわち、第２ピーク強度比Ｐｈ２が上昇すると、電球色から遠くなる。   As shown in FIG. 7, the second evaluation value EV2 is 5 in the halogen light bulb SPL0. That is, the halogen bulb is perceived as being equivalent to the bulb color. When the second peak intensity ratio Ph2 increases, the second evaluation value EV2 decreases. That is, when the second peak intensity ratio Ph2 increases, the color becomes far from the light bulb color.

図７から、第２ピーク強度比Ｐｈ２が４０％以上９０％以下のときに、電球色を基準にしたときに、同等と知覚される、または、違和感が少ないと知覚されることが分かる。第２ピーク強度比Ｐｈ２が８０％以下、さらには、７０％以下のときに、電球色を基準にしたときに、実質的に同等と知覚されることが分かる。   From FIG. 7, it can be seen that when the second peak intensity ratio Ph2 is 40% or more and 90% or less, it is perceived to be equivalent or less uncomfortable when the light bulb color is used as a reference. It can be seen that when the second peak intensity ratio Ph2 is 80% or less, further 70% or less, it is perceived as substantially equivalent when the light bulb color is used as a reference.

図６及び図７の結果から、第２ピーク強度比Ｐｈ２が５０％以上９０％以下のときに、白い対象物は白に近いと知覚され、電球色を基準にしたときに違和感が少ないと知覚される。第２ピーク強度比Ｐｈ２が６０％以上８０％以下のときに、白い対象物は実質的に白に知覚され、電球色を基準にしたときに実質的に同等と知覚される。   From the results of FIGS. 6 and 7, when the second peak intensity ratio Ph2 is 50% or more and 90% or less, it is perceived that the white object is close to white and perceived that there is little discomfort when the light bulb color is used as a reference. Is done. When the second peak intensity ratio Ph2 is not less than 60% and not more than 80%, the white object is perceived as substantially white, and perceived as substantially equivalent when the light bulb color is used as a reference.

例えば、商品の展示などの用途において、電球色を基準にしたときに違和感が少ない照明装置が望まれる。このときに、白い対象物が実質的に白に知覚されることが望まれる。第２ピーク強度比Ｐｈ２が５０％以上９０％以下の照明装置において、このような課題を解決できる。第２ピーク強度比Ｐｈ２が６０％以上８０％以下の照明装置において、より良好な特性が得られる。   For example, in applications such as product display, an illuminating device that has less discomfort when the color of the light bulb is used as a reference is desired. At this time, it is desired that the white object is perceived as substantially white. Such a problem can be solved in the lighting device having the second peak intensity ratio Ph2 of 50% or more and 90% or less. In the lighting device having the second peak intensity ratio Ph2 of 60% or more and 80% or less, better characteristics can be obtained.

図４に関して既に説明したように、第１〜第６試料ＳＰＬ１〜ＳＰＬ６において、６８０ｎｍの波長λにおける出射光の強度は、第１強度Ｉｎｔ１の５５％以上６５％以下である。実施形態においては、６８０ｎｍの波長λにおける出射光の強度は、第１強度Ｉｎｔ１の５５％以上６５％以下とする。これにより、図３に示すように、高い特殊演色評価数Ｒ９が得られる。 As already described with reference to FIG. 4, in the first to sixth samples SPL1 to SPL6, the intensity of the emitted light at the wavelength λ of 680 nm is 55% or more and 65% or less of the first intensity Int1. In the embodiment, the intensity of the emitted light at the wavelength λ of 680 nm is 55% to 65% of the first intensity Int1. Thereby, as shown in FIG. 3, a high special color rendering index R 9 is obtained.

また、第１〜第６試料ＳＰＬ１〜ＳＰＬ６において、５５０ｎｍの波長λにおける出射光の強度は、第１強度Ｉｎｔ１の５５％以上６５％以下である。これにより、色温度を２５００Ｋ以上３３００Ｋ以下の範囲内にしやすくなる。   In the first to sixth samples SPL1 to SPL6, the intensity of the emitted light at the wavelength λ of 550 nm is 55% or more and 65% or less of the first intensity Int1. This makes it easy to set the color temperature within the range of 2500K to 3300K.

実施形態によれば、より自然に対象物を知覚できる照明装置が提供される。   According to the embodiment, a lighting device that can perceive an object more naturally is provided.

以上、具体例を参照しつつ、本発明の実施の形態について説明した。しかし、本発明の実施形態は、これらの具体例に限定されるものではない。例えば、照明装置に含まれる発光素子、波長変換層、蛍光体及び光透過層などの各要素の具体的な構成に関しては、当業者が公知の範囲から適宜選択することにより本発明を同様に実施し、同様の効果を得ることができる限り、本発明の範囲に包含される。   The embodiments of the present invention have been described above with reference to specific examples. However, embodiments of the present invention are not limited to these specific examples. For example, regarding the specific configuration of each element such as a light-emitting element, a wavelength conversion layer, a phosphor, and a light transmission layer included in the illumination device, the present invention is similarly implemented by appropriately selecting from a known range by those skilled in the art. As long as the same effect can be obtained, it is included in the scope of the present invention.

また、各具体例のいずれか２つ以上の要素を技術的に可能な範囲で組み合わせたものも、本発明の要旨を包含する限り本発明の範囲に含まれる。   Moreover, what combined any two or more elements of each specific example in the technically possible range is also included in the scope of the present invention as long as the gist of the present invention is included.

その他、本発明の実施の形態として上述した照明装置を基にして、当業者が適宜設計変更して実施し得る全ての照明装置も、本発明の要旨を包含する限り、本発明の範囲に属する。   In addition, all lighting devices that can be implemented by those skilled in the art based on the lighting device described above as an embodiment of the present invention are also included in the scope of the present invention as long as they include the gist of the present invention. .

その他、本発明の思想の範疇において、当業者であれば、各種の変更例及び修正例に想到し得るものであり、それら変更例及び修正例についても本発明の範囲に属するものと了解される。   In addition, in the category of the idea of the present invention, those skilled in the art can conceive of various changes and modifications, and it is understood that these changes and modifications also belong to the scope of the present invention. .

本発明のいくつかの実施形態を説明したが、これらの実施形態は、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。これら新規な実施形態は、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。これら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 several embodiments of the present invention have been described, these embodiments are presented by way of example and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the scope of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are included in the invention described in the claims and the equivalents thereof.

１１…第１半導体層、 １１ｅ…第１電極、 １２…第２半導体層、 １２ｅ…第２電極、 １３…第３半導体層、 １６…基板、 ４０…波長変換層、 ４１…蛍光体、 ４２…光透過層、 ５０…発光素子、 ５０ａ、５０ｂ…第１、第２発光素子、 ５０ｓ…実装基板、 ５１ｅ…電極、 λ…波長、 λ１…第１ピーク波長、 λ２…第２ピーク波長、 λ３…ボトム波長、 １１０…照明装置、 Ｂｔ…ボトム、 ＣＴ…色温度、 ＥＶ１、ＥＶ２…第１、第２評価値、 Ｉｎｔ…強度、 Ｉｎｔ１〜Ｉｎｔ３…第１〜第３強度、 Ｌｓ…色度、 Ｐｈ２…ピーク強度比、 Ｐｋ１…第１ピーク、 Ｐｋ２…第２ピーク、 Ｒ９…特殊演色評価数、 ＳＰＬ０…ハロゲン電球、 ＳＰＬ１〜ＳＰＬ７…第１〜第７試料、 ｄｕｖ…色度偏差 DESCRIPTION OF SYMBOLS 11 ... 1st semiconductor layer, 11e ... 1st electrode, 12 ... 2nd semiconductor layer, 12e ... 2nd electrode, 13 ... 3rd semiconductor layer, 16 ... Substrate, 40 ... Wavelength conversion layer, 41 ... Phosphor, 42 ... Light transmitting layer, 50 ... Light emitting element, 50a, 50b ... First and second light emitting elements, 50s ... Mounting substrate, 51e ... Electrode, λ ... Wavelength, λ1 ... First peak wavelength, λ2 ... Second peak wavelength, λ3 ... Bottom wavelength, 110 ... Illumination device, Bt ... Bottom, CT ... Color temperature, EV1, EV2 ... First and second evaluation values, Int ... Intensity, Int1-Int3 ... First-third intensity, Ls ... Chromaticity, Ph2 ... peak intensity ratio, Pk1 ... first peak, Pk2 ... second peak, R 9 ... special color rendering index, SPL0 ... halogen bulb, SPL1～SPL7 ... first to seventh sample, duv ... chromaticity deviation

Claims (5)

第１光を放出する発光素子と、
前記第１光の少なくとも一部が入射し前記第１光の波長とは異なる第２光を放出する波長変換層と、
を備え、
前記第１光の少なくとも一部と前記第２光とを含む出射光は、第１ピークと第２ピークとボトムとを有し、
前記第１ピークの第１ピーク波長は、６１０ｎｍ以上６５０ｎｍ以下であり、
前記第２ピークの第２ピーク波長は、４４０ｎｍ以上４８０ｎｍ以下であり、
前記ボトムのボトム波長は、前記第１ピーク波長と前記第２ピーク波長との間にあり、
前記第２ピークの第２強度は、前記第１ピークの第１強度の５０％以上９０％以下であり、
６８０ｎｍの波長における前記出射光の強度は、前記第１強度の５５％以上６５％以下であり、
前記出射光の色温度は、２５００Ｋ以上３３００Ｋ以下であり、
前記出射光の色度偏差は、−０．０２０以上−０．００４以下である、照明装置。 A light emitting device that emits first light;
A wavelength conversion layer for emitting at least a part of the first light and emitting a second light different from the wavelength of the first light;
With
The outgoing light including at least a part of the first light and the second light has a first peak, a second peak, and a bottom,
The first peak wavelength of the first peak is 610 nm or more and 650 nm or less,
The second peak wavelength of the second peak is not less than 440 nm and not more than 480 nm,
The bottom wavelength of the bottom is between the first peak wavelength and the second peak wavelength;
The second intensity of the second peak is 50% or more and 90% or less of the first intensity of the first peak,
The intensity of the emitted light at a wavelength of 680 nm is 55% or more and 65% or less of the first intensity,
The color temperature of the emitted light is 2500K to 3300K,
The illumination device has a chromaticity deviation of the emitted light of −0.020 or more and −0.004 or less. 前記ボトムの第３強度は、前記第１強度の２５％以上３５％以下である、請求項１記載の照明装置。   The lighting device according to claim 1, wherein a third intensity of the bottom is 25% or more and 35% or less of the first intensity. 前記第２ピーク波長と前記ボトム波長との間の波長の上昇において、前記出射光の強度は、単調に減少し、
前記ボトム波長と前記第１ピーク波長との間の波長の上昇において、前記出射光の強度は、単調に上昇する、請求項１または２に記載の照明装置。 In the increase in wavelength between the second peak wavelength and the bottom wavelength, the intensity of the emitted light monotonously decreases,
The illumination device according to claim 1 or 2, wherein the intensity of the emitted light monotonously increases when the wavelength increases between the bottom wavelength and the first peak wavelength. ５５０ｎｍの波長における前記出射光の強度は、前記第１強度の５５％以上６５％以下である、請求項１〜３のいずれか１つに記載の照明装置。   The illumination device according to any one of claims 1 to 3, wherein the intensity of the emitted light at a wavelength of 550 nm is 55% or more and 65% or less of the first intensity. 前記第２ピークの第２強度は、前記第１ピークの第１強度の６０％以上８０％以下である、請求項１〜４のいずれか１つに記載の照明装置。   5. The illumination device according to claim 1, wherein a second intensity of the second peak is not less than 60% and not more than 80% of the first intensity of the first peak.
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JP2009161576A (en) * 2007-12-28 2009-07-23 Mitsubishi Chemicals Corp Fluorescent substance and light emitting apparatus using it
JP2014197673A (en) * 2013-03-04 2014-10-16 三菱化学株式会社 Light-emitting device including semiconductor light-emitting element, method for designing light-emitting device, method for driving light-emitting device, and illumination method
JP2016054044A (en) * 2014-09-03 2016-04-14 シチズン電子株式会社 Light emitting device including semiconductor light emitting element, light emitting device design method, light emitting device driving method and lighting method

Patent Citations (3)

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Publication number Priority date Publication date Assignee Title
JP2009161576A (en) * 2007-12-28 2009-07-23 Mitsubishi Chemicals Corp Fluorescent substance and light emitting apparatus using it
JP2014197673A (en) * 2013-03-04 2014-10-16 三菱化学株式会社 Light-emitting device including semiconductor light-emitting element, method for designing light-emitting device, method for driving light-emitting device, and illumination method
JP2016054044A (en) * 2014-09-03 2016-04-14 シチズン電子株式会社 Light emitting device including semiconductor light emitting element, light emitting device design method, light emitting device driving method and lighting method

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