JP2008021561A - Illumination device - Google Patents

Illumination device Download PDF

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JP2008021561A
JP2008021561A JP2006193328A JP2006193328A JP2008021561A JP 2008021561 A JP2008021561 A JP 2008021561A JP 2006193328 A JP2006193328 A JP 2006193328A JP 2006193328 A JP2006193328 A JP 2006193328A JP 2008021561 A JP2008021561 A JP 2008021561A
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light
lens
illumination
led
base
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Masahiro Toda
雅宏 戸田
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Toshiba Lighting and Technology Corp
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Toshiba Lighting and Technology Corp
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Abstract

<P>PROBLEM TO BE SOLVED: To enable to make a room (space) as a whole brightly visible by LED illumination. <P>SOLUTION: This illumination device is provided with a white LED 3 to emit light for illumination, a Fresnel lens 6 in which an inclined face group 8 to refract the light is cocentrically formed in a face opposite to this white LED 3 and in which a reflecting face 7 is formed outside that inclined face group 8, and a support part 5b to separate the white LED 3 and the Fresnel lens 6 from each other with a prescribed spacing and to support the light emitted from the while LED 3 and reflected by the reflecting face 7 so as to discharged outside from between each other. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

本発明は、例えば、発光ダイオード(以下LEDと称す。)などの発光素子を光源とする照明装置に関する。   The present invention relates to a lighting device using a light emitting element such as a light emitting diode (hereinafter referred to as LED) as a light source.

近年、照明装置に白色LEDなどの光源が利用されるようになってきた。   In recent years, light sources such as white LEDs have come to be used in lighting devices.

白色LEDは、発光部分が小さく、明るさが従来の蛍光灯などに比べて暗いため、通常、レンズと組み合わせて利用される。   A white LED is usually used in combination with a lens because the light emitting portion is small and the brightness is darker than that of a conventional fluorescent lamp.

従来、白色LEDと組み合わされるレンズには、特に集光効率が高い全反射複合型レンズ(以下「カップレンズ」と称す)が用いられ、白色LEDから発光された光をカップレンズの放物面で反射させて一方向へ向けて射出するよう配光制御している(例えば特許文献1参照)。
特開2003−281909号公報
Conventionally, a total reflection composite lens (hereinafter referred to as a “cup lens”) having a particularly high light collection efficiency has been used as a lens combined with a white LED, and the light emitted from the white LED is reflected on the paraboloid of the cup lens. Light distribution is controlled so that the light is reflected and emitted in one direction (see, for example, Patent Document 1).
JP 2003-281909 A

しかしながら、従来の技術の場合、白色LEDの光をカップレンズで全反射して利用する構造のため、一方向のみしか明るくならない。   However, in the case of the conventional technique, the light of the white LED is totally reflected by the cup lens and used, so that it is bright only in one direction.

このため、光が射出されるレンズの面は輝度が極端に高くなり、カップレンズ周辺あるいはLED照明器具周辺の輝度が極端に低くなり、輝度差が大きく、グレアになる。   For this reason, the brightness of the lens surface from which light is emitted becomes extremely high, the brightness around the cup lens or around the LED lighting fixture becomes extremely low, the brightness difference is large, and glare occurs.

つまりカップレンズ内から射出面を透過する光しか照明として利用できないため、照明装置が、例えば天井取付型の照明器具などの場合、器具自体の発光部分が極端に明るい反面、その周囲の天井部分が暗くなり、部屋(空間)全体としてみた場合に照明が暗く見え、人の感覚として不快に感じるという問題があった。   In other words, since only light that passes through the exit surface from the inside of the cup lens can be used as illumination, when the lighting device is, for example, a ceiling-mounted lighting fixture, the light emitting portion of the fixture itself is extremely bright, while the surrounding ceiling portion is There was a problem that when it was dark and the room (space) was viewed as a whole, the lighting seemed dark and it was uncomfortable as a human sense.

本発明はこのような課題を解決するためになされたもので、発光部分とその周囲との輝度差を低減し、部屋(空間)全体として明るく見えるようにできる照明装置を提供することを目的とする。   The present invention has been made to solve such a problem, and an object of the present invention is to provide an illuminating device capable of reducing a luminance difference between a light emitting portion and its surroundings so that the entire room (space) looks bright. To do.

上記の課題を解決するために請求項1記載の発明の照明装置は、基体と;この基体に配設された光源と;前記基体と対向して配置されたレンズ面に、前記光源から発光された光を屈析あるいは全反射させて透過する傾斜面が同心円状に形成され、かつ前記傾斜面の外周部に反射面が形成されたレンズ体と;前記基体とレンズ面とを所定間隔で離間してなる空間から側方へ向けて光が放出可能に支持する支持部材と;を具備することを特徴とする。   In order to solve the above-mentioned problems, an illumination device according to a first aspect of the present invention includes a base; a light source disposed on the base; a lens surface disposed opposite to the base; A lens body in which an inclined surface that reflects and transmits the reflected light is concentrically formed and a reflecting surface is formed on an outer peripheral portion of the inclined surface; and the base and the lens surface are spaced apart at a predetermined interval. And a supporting member that supports the light so that light can be emitted from the space to the side.

請求項1記載の発明では、レンズ体に、同心円状に傾斜面を形成すると共に、その外周部に反射面を形成したことで、光源より発光された光が反射面で反射して側方へ放出されて、天井面が照明されるので、照明部分と天井面との輝度差が少なくなり、グレアを軽減することができる。   In the first aspect of the present invention, the lens body is formed with a concentric inclined surface and a reflecting surface is formed on the outer peripheral portion thereof, so that the light emitted from the light source is reflected by the reflecting surface to the side. Since it is emitted and the ceiling surface is illuminated, the luminance difference between the illumination part and the ceiling surface is reduced, and glare can be reduced.

請求項2記載の発明の照明装置は、請求項1記載の照明装置において、前記光源と前記レンズ体との対を複数設けたことを特徴とする。
請求項2記載の発明では、光源とレンズ体との対を複数設けたことで、請求項1の効果に加えて照明装置全体として照度を向上することができる。
A lighting device according to a second aspect of the present invention is the lighting device according to the first aspect, wherein a plurality of pairs of the light source and the lens body are provided.
In the invention according to claim 2, by providing a plurality of pairs of the light source and the lens body, it is possible to improve the illuminance as the whole lighting apparatus in addition to the effect of claim 1.

請求項3記載の発明の照明装置は、請求項1記載の照明装置において、前記光源が、異なる波長成分の混在した光を照射する発光ダイオードであることを特徴とする。
請求項3記載の発明では、光源を、異なる波長成分の混在した光を照射する発光ダイオードとしたことで、光源の構造が単純でかつ効率が高まり、請求項1の効果に加えて、照明装置を安価にかつ高性能に構成できる。
According to a third aspect of the present invention, there is provided a lighting device according to the first aspect, wherein the light source is a light emitting diode that emits light in which different wavelength components are mixed.
In the invention described in claim 3, since the light source is a light emitting diode that emits light in which different wavelength components are mixed, the structure of the light source is simple and the efficiency is increased. In addition to the effect of claim 1, the illumination device Can be configured at low cost and with high performance.

請求項4記載の発明の照明装置は、請求項1記載の照明装置において、前記レンズ体がフレネルレンズであることを特徴とする。
請求項4記載の発明では、レンズ体としてフレネルレンズを用いることで、請求項1の効果に加えて照明装置を薄く構成できる。
According to a fourth aspect of the present invention, there is provided a lighting device according to the first aspect, wherein the lens body is a Fresnel lens.
In the invention of claim 4, by using a Fresnel lens as the lens body, in addition to the effect of claim 1, the lighting device can be made thin.

請求項1記載の発明によれば、照明部分と天井面との輝度差が少なくなり、グレアを軽減することができる。   According to the first aspect of the present invention, the difference in luminance between the illumination part and the ceiling surface is reduced, and glare can be reduced.

請求項2記載の発明によれば、請求項1の効果に加えて照明装置全体としての照度を向上することができる。   According to invention of Claim 2, in addition to the effect of Claim 1, the illumination intensity as the whole illuminating device can be improved.

請求項3記載の発明によれば、光源の構造が単純でかつ効率が高まり、請求項1の効果に加えて、照明装置を安価にかつ高性能に構成できる。
請求項4記載の発明によれば、請求項1の効果に加えて照明装置を薄く構成できる。
According to the third aspect of the present invention, the structure of the light source is simple and the efficiency is increased. In addition to the effect of the first aspect, the illumination device can be configured at low cost and with high performance.
According to invention of Claim 4, in addition to the effect of Claim 1, an illuminating device can be comprised thinly.

このように本発明によれば、光源とその周囲との輝度差を低減し、部屋(空間)全体として明るく見えるようになる。   As described above, according to the present invention, the luminance difference between the light source and its surroundings is reduced, and the whole room (space) looks bright.

以下、本発明の実施の形態について図面を参照しながら説明する。図1は本発明の実施形態に係る照明装置の構成を示す分解斜視図、図2は図1の照明装置のA−A断面図、図3は図2の断面図のB部分の拡大図である。   Hereinafter, embodiments of the present invention will be described with reference to the drawings. 1 is an exploded perspective view showing a configuration of a lighting device according to an embodiment of the present invention, FIG. 2 is a cross-sectional view taken along line AA of the lighting device in FIG. 1, and FIG. 3 is an enlarged view of a portion B of the cross-sectional view in FIG. is there.

図1,図2に示すように、この照明装置は、ほぼ円形状の基体1と、照明用の光を発光する光源としての白色発光ダイオード3(以下「白色LED3」と称す)と、基体1に固定されたレンズ体としての照明カバー4とを備える天井取り付け型または壁面取り付け型の照明装置である。   As shown in FIG. 1 and FIG. 2, this illumination device includes a substantially circular base 1, a white light emitting diode 3 (hereinafter referred to as “white LED 3”) as a light source for emitting illumination light, and a base 1. It is a ceiling-mounted type or wall-mounted type lighting device provided with a lighting cover 4 as a lens body fixed to the wall.

基体1は、上面が例えば天井または壁面などに固定される。基体1には、内面である基面2が設けられている。基面2には、複数の白色LED3がほぼ等間隔に配置および固定されている。つまり基体1には、複数の白色LED3が配設されている。   An upper surface of the base 1 is fixed to, for example, a ceiling or a wall surface. The base 1 is provided with a base surface 2 which is an inner surface. A plurality of white LEDs 3 are arranged and fixed on the base surface 2 at substantially equal intervals. That is, the base 1 is provided with a plurality of white LEDs 3.

白色LED3は、例えば青色発光するLEDチップの発光部周囲を、黄色の蛍光層でモールドしたものであり、青色光と黄色との混合色で白色光を所定方向(この例の場合、下方向)へ向けて照射するものである。つまり、この白色LED3は、異なる波長成分の混在した光を照射する発光ダイオードである。なお、この他、光源としては、単色光のLEDも利用可能である。   For example, the white LED 3 is obtained by molding the periphery of a light emitting portion of an LED chip that emits blue light with a yellow fluorescent layer, and white light is mixed in a predetermined direction (downward in this case) with a mixed color of blue light and yellow light. It irradiates towards. That is, the white LED 3 is a light emitting diode that emits light in which different wavelength components are mixed. In addition, a monochromatic LED can also be used as the light source.

照明カバー4は、円形状の板面5aとその縁部から立ち上げられた円筒状の支持部5bとで構成されており、光を透過する透明または半透明のガラスまたは樹脂で形成されている。   The illumination cover 4 includes a circular plate surface 5a and a cylindrical support portion 5b raised from the edge thereof, and is formed of transparent or translucent glass or resin that transmits light. .

支持部5bは、基面2とフレネルレンズ6のレンズ面とを所定間隔で離間してなる空間から側方へ向けて光が放出可能に支持するものである。
つまり、支持部5bは、基面2とフレネルレンズ6のレンズ面とを所定間隔で離間し、かつ互いの面で挟まれた空間から側方へ向けて光が放出可能に支持する支持部材を兼ねる。
The support portion 5b supports the base surface 2 and the lens surface of the Fresnel lens 6 so that light can be emitted from a space formed by separating the base surface 2 and the lens surface at a predetermined interval.
That is, the support portion 5b is a support member that supports the base surface 2 and the lens surface of the Fresnel lens 6 at a predetermined interval and supports the light so that light can be emitted from the space sandwiched between the surfaces. I also serve.

照明カバー4には、各白色LED3の直下に位置するように、複数のフレネルレンズ6がほぼ円形状に形成されている。   In the illumination cover 4, a plurality of Fresnel lenses 6 are formed in a substantially circular shape so as to be positioned immediately below each white LED 3.

図3に示すように、フレネルレンズ6は、基面2と対向する照明カバー4の上面に形成されている。フレネルレンズ6は、白色LED3から発光された光を屈析させて透過する傾斜面群8を、光軸9を中心として同心円状に形成したものである。   As shown in FIG. 3, the Fresnel lens 6 is formed on the upper surface of the illumination cover 4 facing the base surface 2. The Fresnel lens 6 is formed by concentrically forming an inclined surface group 8 that refracts and transmits the light emitted from the white LED 3 around the optical axis 9.

このフレネルレンズ6の傾斜面群8の外周部、つまり周囲には、反射面7が形成されている。反射面7は、鏡面層を被膜して形成しても良く、照明カバー4の上面自体を反射性の良い拡散面として形成してもよい。また、反射面7は、所望の色で被膜形成しても良い。   A reflection surface 7 is formed on the outer peripheral portion of the inclined surface group 8 of the Fresnel lens 6, that is, the periphery thereof. The reflecting surface 7 may be formed by coating a mirror surface layer, or the upper surface of the lighting cover 4 itself may be formed as a diffusing surface having good reflectivity. Further, the reflecting surface 7 may be formed with a desired color.

このように反射面7を色面とすることで、白色LEDの特性から反射面7の色が天井などに映し出されるようになり、演色効果が得られる。反射面7の反射率を、例えば90%以上とすることで、天井面の側の明るさを、グレアを軽減できる程度の明るさに確保することができる。   By using the reflective surface 7 as a color surface in this way, the color of the reflective surface 7 is projected on the ceiling or the like from the characteristics of the white LED, and a color rendering effect is obtained. By setting the reflectance of the reflecting surface 7 to 90% or more, for example, the brightness on the ceiling surface side can be ensured to a brightness that can reduce glare.

この照明装置は、白色LED3とフレネルレンズ6との対を複数設け、これらで一つの照明としたものである。   This illuminating device is provided with a plurality of pairs of white LED 3 and Fresnel lens 6 to form one illumination.

ここで、この照明装置の照明動作について説明する。
この照明装置では、白色LED3から発光された光がフレネルレンズ6に入射すると、その光は、フレネルレンズ6を透過してほぼ平行方向Xに出射され、フレネルレンズ6の直下が照明される。なお、この例では、光がほぼ平行方向Xに出射される例を示したが、フレネルレンズ6の設計の仕方によっては平行光でなくても良い。
Here, the illumination operation of the illumination device will be described.
In this illuminating device, when light emitted from the white LED 3 enters the Fresnel lens 6, the light passes through the Fresnel lens 6 and is emitted in a substantially parallel direction X, so that the light directly below the Fresnel lens 6 is illuminated. In this example, an example is shown in which light is emitted in a substantially parallel direction X. However, the light may not be parallel light depending on how the Fresnel lens 6 is designed.

また、白色LED3から発光された光がフレネルレンズ6の周囲の反射面7に入射すると、その光は、反射面7によって反射されて側面の支持部5bを透過して図2のY方向へ出射され、天井面が照明される。   When the light emitted from the white LED 3 is incident on the reflecting surface 7 around the Fresnel lens 6, the light is reflected by the reflecting surface 7, passes through the side support portion 5b, and is emitted in the Y direction in FIG. And the ceiling surface is illuminated.

なお、側面の支持部5bから出射される光は、単なる反射のため(レンズを通していないため)、フレネルレンズ6を透過した光よりも弱いものである。   Note that the light emitted from the side support portion 5 b is weaker than the light transmitted through the Fresnel lens 6 because of simple reflection (since it does not pass through the lens).

このようにこの実施形態の照明装置によれば、天井に取り付けた場合、白色LED3から発光された光がフレネルレンズ6を透過して直下が照明されると共に、該光が反射面7によって反射されて照明カバー4の側面を透過して天井面が照明されるので、グレアになりにくくなり、人が不快に感じにくい照明装置を提供することができる。   Thus, according to the illumination device of this embodiment, when mounted on the ceiling, the light emitted from the white LED 3 passes through the Fresnel lens 6 and is illuminated immediately below, and the light is reflected by the reflecting surface 7. Since the ceiling surface is illuminated through the side surface of the illumination cover 4, it is possible to provide an illumination device that is less prone to glare and is uncomfortable for humans.

また、反射面7により、天井面が明るくなるので、部屋または空間全体を明るく照明することができる。さらに、フレネルレンズ6により配光制御でき、薄いLED照明装置を実現できる。   Further, since the ceiling surface is brightened by the reflecting surface 7, the entire room or space can be illuminated brightly. Furthermore, light distribution can be controlled by the Fresnel lens 6, and a thin LED lighting device can be realized.

さらに、支持部5bが、例えば赤色などに着色されていれば、天井面を赤色で照明することができ、演出効果を得ることができる。   Furthermore, if the support portion 5b is colored, for example, in red, the ceiling surface can be illuminated in red, and an effect can be obtained.

なお、本願発明は、上記実施形態のみに限定されるものではなく、実施段階ではその要旨を逸脱しない範囲で構成要素を変形してもよい。また、上記実施形態に開示されている複数の構成要素を適宜組み合わせることにより、種々の発明を構成できる。
例えば上記実施形態に示される全構成要素から幾つかの構成要素を削除してもよい。さらに、異なる実施形態にわたる構成要素を適宜組み合わせてもよい。
In addition, this invention is not limited only to the said embodiment, You may deform | transform a component in the range which does not deviate from the summary in an implementation stage. In addition, various inventions can be configured by appropriately combining a plurality of components disclosed in the embodiment.
For example, you may delete some components from all the components shown by the said embodiment. Furthermore, constituent elements over different embodiments may be appropriately combined.

具体的には、上記実施形態では、円形状の板面5aと円筒状の支持部5bとを一体成型した照明カバー4の一部として例示したが、支持部5bについては、照明カバー4とは別に、板面5aに支持専用の柱状のスペーサを数箇所立設し、基体1の基面2とフレネルレンズ6の面とを所定間隔に支持するようにしても良い。   Specifically, in the above embodiment, the circular plate surface 5a and the cylindrical support portion 5b are exemplified as a part of the illumination cover 4 integrally formed. However, the support portion 5b is the illumination cover 4 Separately, several columnar spacers dedicated to support may be provided on the plate surface 5a to support the base surface 2 of the base 1 and the surface of the Fresnel lens 6 at a predetermined interval.

また、上記実施形態では、光源として白色LED3を用いたが、これ以外に、例えば赤色LED、青色LED、緑色LEDなどの3色の光源を設けて白色光を生成するようにしても良く、紫外LEDなどの光源から発光された紫外光をRGB蛍光体を介して出射することで、白色光を生成するようにしても良い。   In the above embodiment, the white LED 3 is used as the light source. However, in addition to this, white light may be generated by providing three color light sources such as a red LED, a blue LED, and a green LED. White light may be generated by emitting ultraviolet light emitted from a light source such as an LED through an RGB phosphor.

さらに、本実施形態では、白色LEDを用いたが、これだけでなく、例えば電球色、昼白色、昼光色、橙色など、一般的な蛍光灯と同様な色を発光するLEDを用いても良い。   Further, in the present embodiment, the white LED is used. However, not only this, but also an LED that emits a color similar to that of a general fluorescent lamp, such as a light bulb color, a daylight white color, a daylight color, and an orange color, may be used.

本発明の一実施形態の照明装置の構成を示す分解斜視図である。It is a disassembled perspective view which shows the structure of the illuminating device of one Embodiment of this invention. 図1の照明装置を組み立てた状態のA−A断面図である。It is AA sectional drawing of the state which assembled the illuminating device of FIG. 図2のB部分の拡大図である。FIG. 3 is an enlarged view of a portion B in FIG. 2.

符号の説明Explanation of symbols

1…基材、2…基面、3…白色発光ダイオード(白色LED)、4…照明カバー、5a…板面、5b…支持部、6…フレネルレンズ、7…反射面、8…傾斜面群、9…光軸。   DESCRIPTION OF SYMBOLS 1 ... Base material, 2 ... Base surface, 3 ... White light emitting diode (white LED), 4 ... Illumination cover, 5a ... Plate surface, 5b ... Support part, 6 ... Fresnel lens, 7 ... Reflecting surface, 8 ... Inclined surface group , 9: Optical axis.

Claims (4)

基体と;
この基体に配設された光源と;
前記基体と対向して配置されたレンズ面に、前記光源から発光された光を屈析させて透過する傾斜面が同心円状に形成され、かつ前記傾斜面の外周部に反射面が形成されたレンズ体と;
前記基体とレンズ面とを所定間隔で離間してなる空間から側方へ向けて光が放出可能に支持する支持部材と;
を具備することを特徴とする照明装置。
A substrate;
A light source disposed on the substrate;
An inclined surface that refracts and transmits light emitted from the light source is concentrically formed on the lens surface disposed opposite to the base, and a reflecting surface is formed on the outer peripheral portion of the inclined surface. A lens body;
A support member that supports the base and the lens surface so that light can be emitted sideways from a space formed by separating the base and the lens surface;
An illumination device comprising:
請求項1記載の照明装置において、
前記光源と前記レンズ体との対を複数設けたことを特徴とする照明装置。
The lighting device according to claim 1.
A lighting device comprising a plurality of pairs of the light source and the lens body.
請求項1記載の照明装置において、
前記光源が、異なる波長成分の混在した光を照射する発光ダイオードであることを特徴とする照明装置。
The lighting device according to claim 1.
The illumination device, wherein the light source is a light emitting diode that emits light in which different wavelength components are mixed.
請求項1記載の照明装置において、
前記レンズ体がフレネルレンズであることを特徴とする照明装置。
The lighting device according to claim 1.
The illumination device, wherein the lens body is a Fresnel lens.
JP2006193328A 2006-07-13 2006-07-13 Illumination device Withdrawn JP2008021561A (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010205501A (en) * 2009-03-02 2010-09-16 Hikari Denki Seisakusho:Kk Lighting fixture
WO2013011410A1 (en) * 2011-07-20 2013-01-24 Koninklijke Philips Electronics N.V. A lighting element, a lighting system and a luminaire providing a skylight appearance
JP2014522079A (en) * 2011-07-08 2014-08-28 コーニンクレッカ フィリップス エヌ ヴェ Glow luminaire housing with phosphor
JP2015090763A (en) * 2013-11-05 2015-05-11 パナソニックIpマネジメント株式会社 Lighting device

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010205501A (en) * 2009-03-02 2010-09-16 Hikari Denki Seisakusho:Kk Lighting fixture
JP2014522079A (en) * 2011-07-08 2014-08-28 コーニンクレッカ フィリップス エヌ ヴェ Glow luminaire housing with phosphor
US9845921B2 (en) 2011-07-08 2017-12-19 Philips Lighting Holding B.V. Glowing luminaire housing with phosphor
WO2013011410A1 (en) * 2011-07-20 2013-01-24 Koninklijke Philips Electronics N.V. A lighting element, a lighting system and a luminaire providing a skylight appearance
CN103688105A (en) * 2011-07-20 2014-03-26 皇家飞利浦有限公司 A lighting element, a lighting system and a luminaire providing a skylight appearance
JP2014521202A (en) * 2011-07-20 2014-08-25 コーニンクレッカ フィリップス エヌ ヴェ Lighting elements, lighting systems, and luminaries that provide a skylight appearance
RU2606969C2 (en) * 2011-07-20 2017-01-10 Филипс Лайтинг Холдинг Б.В. Lighting element, lighting system and luminaire providing skylight appearance
CN103688105B (en) * 2011-07-20 2017-02-22 皇家飞利浦有限公司 A lighting element, a lighting system and a luminaire providing a skylight appearance
US9791131B2 (en) 2011-07-20 2017-10-17 Philips Lighting Holding B.V. Lighting element, a lighting system and a luminaire providing a skylight appearance
JP2015090763A (en) * 2013-11-05 2015-05-11 パナソニックIpマネジメント株式会社 Lighting device

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