JP2011108496A - Indirect lighting device - Google Patents

Indirect lighting device Download PDF

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JP2011108496A
JP2011108496A JP2009262419A JP2009262419A JP2011108496A JP 2011108496 A JP2011108496 A JP 2011108496A JP 2009262419 A JP2009262419 A JP 2009262419A JP 2009262419 A JP2009262419 A JP 2009262419A JP 2011108496 A JP2011108496 A JP 2011108496A
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Prior art keywords
light
illumination
light distribution
indirect
led line
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JP2009262419A
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JP5405274B2 (en
Inventor
Yasutaka Tomogane
容崇 友金
Yoshihide Fujita
吉秀 藤田
Satoshi Ota
聡 太田
Keigo Nakano
啓吾 中野
Koichi Goto
浩一 後藤
Akira Semura
明 瀬村
Masabumi Uno
正文 宇野
Naozumi Orii
直純 折居
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Sekisui House Ltd
Koizumi Lighting Technology Corp
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Sekisui House Ltd
Koizumi Lighting Technology Corp
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Priority to JP2009262419A priority Critical patent/JP5405274B2/en
Priority to AU2010320058A priority patent/AU2010320058B8/en
Priority to PCT/JP2010/070582 priority patent/WO2011062230A1/en
Priority to CN201080043344.0A priority patent/CN102639928B/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V7/00—Reflectors for light sources
    • F21V7/0008—Reflectors for light sources providing for indirect lighting
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S4/00—Lighting devices or systems using a string or strip of light sources
    • F21S4/20—Lighting devices or systems using a string or strip of light sources with light sources held by or within elongate supports
    • F21S4/28—Lighting devices or systems using a string or strip of light sources with light sources held by or within elongate supports rigid, e.g. LED bars
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V5/00—Refractors for light sources
    • F21V5/04—Refractors for light sources of lens shape
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S8/00—Lighting devices intended for fixed installation
    • F21S8/03—Lighting devices intended for fixed installation of surface-mounted type
    • F21S8/033—Lighting devices intended for fixed installation of surface-mounted type the surface being a wall or like vertical structure, e.g. building facade
    • F21S8/037—Lighting devices intended for fixed installation of surface-mounted type the surface being a wall or like vertical structure, e.g. building facade for mounting in a corner, i.e. between adjacent walls or wall and ceiling
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2103/00—Elongate light sources, e.g. fluorescent tubes
    • F21Y2103/10—Elongate light sources, e.g. fluorescent tubes comprising a linear array of point-like light-generating elements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2115/00—Light-generating elements of semiconductor light sources
    • F21Y2115/10—Light-emitting diodes [LED]

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
  • Arrangement Of Elements, Cooling, Sealing, Or The Like Of Lighting Devices (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide an indirect lighting device 1 capable of raising lighting uniformity of an irradiating surface even if a light source is mounted on an end of the irradiating surface. <P>SOLUTION: The indirect lighting device 1 which irradiates light on a wall surface 5 or a ceiling surface 3 and lights up with the reflected light has an LED line illumination 14 made of a plurality of LEDs 13 arranged in a line at one end of the wall surface 5 or the ceiling surface 3, and a light-distributing lens 15 for controlling light distribution of light emitted from the LED line illumination 14. The light-distributing lens 15 is formed so as to make intensity of illumination on the irradiating surface of the wall surface 5 or the ceiling surface 3 uniform by a precalculated light-distributing curve. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

この発明は、コーブ照明及びコーニス照明などのように、光源から室内の天井面や壁面に光を照射して、その反射光により室内を照明する間接照明装置に関する。   The present invention relates to an indirect illumination device that irradiates light on a ceiling surface or a wall surface of a room from a light source and illuminates the room with the reflected light, such as cove illumination and cornice illumination.

従来より、グレアを制限しつつ、室内をやわらかい雰囲気にする照明方法として、壁面、床面、又は天井面などの照射面に光を当て、その反射光で室内を照明する間接照明装置が用いられている。このような間接照明装置１００の一例としては、例えば、図８に示すように、壁面１０１と天井面１０２との境界において、壁面１０１又は天井面１０２に光源収納用の溝部１０３を設けて、光源となる例えば放電灯１０４を設置し、放電灯１０４から照射される光Ｌを壁面１０１や天井面１０２などの照射面１０５で反射させた反射光を被照射空間Ｓに照射する装置が種々提案されている（例えば、特許文献１）。   Conventionally, as an illumination method for limiting the glare and making the room have a soft atmosphere, an indirect illumination device that illuminates the interior with the reflected light by applying light to an irradiation surface such as a wall surface, floor surface, or ceiling surface has been used. ing. As an example of such an indirect lighting device 100, for example, as shown in FIG. 8, a light source housing groove 103 is provided on the wall surface 101 or the ceiling surface 102 at the boundary between the wall surface 101 and the ceiling surface 102. For example, various apparatuses for installing the discharge lamp 104 and irradiating the irradiated space S with the reflected light obtained by reflecting the light L emitted from the discharge lamp 104 by the irradiation surface 105 such as the wall surface 101 or the ceiling surface 102 have been proposed. (For example, Patent Document 1).

特開２００９−１５２１４５号公報JP 2009-152145 A

このような間接照明装置１００においては、光源となる放電灯１０４と照射面１０５との間の距離を大きくとることができれば、照射面１０５における高い照明均斉度を得ることができるが、放電灯１０４からの直射光を被照射空間Ｓに漏らすことなく、放電灯１０４と照射面１０５との間の距離を大きくとることは不可能である。したがって、通常は照射面の一方の端部の近傍に放電灯１０４を設置することになり、この放電灯１０４側の端部付近の照射面１０５が極めて明るくなる一方、放電灯１０４から離れるにつれ暗くなり、照射面１０５の照明均斉度が極めて悪くなる。   In such an indirect lighting device 100, if the distance between the discharge lamp 104 serving as the light source and the irradiation surface 105 can be increased, a high illumination uniformity on the irradiation surface 105 can be obtained. It is impossible to increase the distance between the discharge lamp 104 and the irradiation surface 105 without leaking direct light from the discharge space S. Therefore, normally, the discharge lamp 104 is installed in the vicinity of one end portion of the irradiation surface, and the irradiation surface 105 near the end portion on the discharge lamp 104 side becomes extremely bright, but becomes darker as the distance from the discharge lamp 104 increases. Thus, the illumination uniformity of the irradiation surface 105 is extremely deteriorated.

そこで、本発明は照射面の端部に光源が設置される場合であっても、照射面の照明均斉度を高くすることができる間接照明装置を提供することを目的とする。   In view of the above, an object of the present invention is to provide an indirect illumination device that can increase the illumination uniformity of the irradiated surface even when a light source is installed at the end of the irradiated surface.

請求項１に記載の間接照明装置は、面体に照射し、その反射光により照明する間接照明装置であって、前記面体の一方の端部にライン状に並べて設けられた複数のＬＥＤからなるＬＥＤライン照明と、該ＬＥＤライン照明から射出される光の配光を制御する配光レンズと、を備え、前記配光レンズは、予め算出された配光曲線により前記面体の照射面照度が均一になるように形成されたものであることを特徴としている。   The indirect illumination device according to claim 1 is an indirect illumination device that irradiates a face body and illuminates with reflected light, and is an LED composed of a plurality of LEDs arranged in a line at one end of the face body. Line illumination and a light distribution lens for controlling the light distribution of the light emitted from the LED line illumination, and the illumination lens has a uniform illumination intensity on the irradiation surface of the face by a pre-calculated light distribution curve. It is characterized by being formed as follows.

請求項２に記載の間接照明装置は、前記配光曲線は、前記面体に対する入射角をθとし、前記面体に入射する位置の法線照度をＥとし、前記面体から光源までの距離をｄとし、前記配光レンズを透過した光の光度をＩとした場合に、ｎが１から３の範囲内の変数であって、下記の数１で表されることを特徴としている。

Figure 2011108496
The indirect illumination device according to claim 2, wherein the light distribution curve has an incident angle with respect to the face body as θ, a normal illuminance at a position incident on the face body as E, and a distance from the face body to the light source as d. When the luminous intensity of the light transmitted through the light distribution lens is I, n is a variable within a range of 1 to 3, and is represented by the following equation (1).
Figure 2011108496

請求項３に記載の間接照明装置は、異なる色温度に発光する少なくとも２以上のＬＥＤライン照明を備え、いずれか一方のＬＥＤライン照明を発光させることにより、発光色温度を変更可能であることを特徴としている。   The indirect illumination device according to claim 3 includes at least two or more LED line illuminations that emit light at different color temperatures, and the emission color temperature can be changed by causing any one of the LED line illuminations to emit light. It is a feature.

請求項４に記載の間接照明装置は、天井面を照射するコーブ照明又は壁面を照射するコーニス照明であることを特徴としている。   The indirect illumination device according to claim 4 is a cove illumination for irradiating a ceiling surface or a cornice illumination for illuminating a wall surface.

請求項１に記載の間接照明装置によると、光源が複数のＬＥＤからなるＬＥＤライン照明であるので、寿命や消費電力においてメリットがあるＬＥＤを使用して、照射面の幅方向にムラなく照射することができる。しかも、ＬＥＤライン照明からの光を配光レンズにより、面体の照射面照度が均一になるように配光制御するので、照射面の照明均斉度を高くすることができる。   According to the indirect illumination device according to claim 1, since the light source is LED line illumination composed of a plurality of LEDs, LEDs that have merits in life and power consumption are used to irradiate evenly in the width direction of the irradiation surface. be able to. In addition, since the light distribution of the light from the LED line illumination is controlled by the light distribution lens so that the illuminating surface illuminance of the mask is uniform, the illumination uniformity on the irradiating surface can be increased.

請求項２に記載の間接照明装置によると、上述の数式により求められる各入射角θ毎の光度Ｉを配光曲線として表すことができ、ＬＥＤライン照明から射出される光を配光レンズによって制御して、入射角θ毎の光度Ｉをこの配光曲線に対応するように配光制御することにより、照射面の照明均斉度を高くすることができる。なお、コーブ照明またはコーニス照明としては、変数ｎが３である場合が最も好ましい。   According to the indirect illumination device according to claim 2, the luminous intensity I for each incident angle θ obtained by the above formula can be expressed as a light distribution curve, and the light emitted from the LED line illumination is controlled by the light distribution lens. Thus, by controlling the light distribution so that the light intensity I for each incident angle θ corresponds to this light distribution curve, the illumination uniformity of the irradiated surface can be increased. In addition, as a cove illumination or a cornice illumination, the case where the variable n is 3 is the most preferable.

請求項３に記載の間接照明装置によると、色温度が異なる２以上のＬＥＤライン照明の一方を発光させた場合と他方を発光させた場合の変化により、発光色温度を変更することができるので、間接照明装置を設置する部屋の使用目的や時間帯に応じて、より快適な色温度の間接照明にすることができる。   According to the indirect illumination device according to claim 3, the emission color temperature can be changed by a change in the case where one of two or more LED line illuminations having different color temperatures emits light and the other when the other emits light. Depending on the purpose of use and the time zone of the room where the indirect lighting device is installed, indirect lighting with a more comfortable color temperature can be achieved.

請求項４に記載の間接照明装置によると、天井面を照射するコーブ照明又は壁面を照射するコーニス照明であるので、例えば住宅等の居住空間の照明として適切に用いることができる。   According to the indirect illumination device of the fourth aspect, since it is a cove illumination that irradiates a ceiling surface or a cornice illumination that irradiates a wall surface, it can be appropriately used as illumination of a living space such as a house.

コーニス照明の間接照明装置の設置例を示す簡略断面図。The simplified sectional view showing the example of installation of the indirect lighting device of cornice lighting. 間接照明装置の全体構成を説明する斜視図。The perspective view explaining the whole structure of an indirect lighting device. 間接照明装置の配光レンズの形状を説明する簡略断面図。The simplified sectional view explaining the shape of the light distribution lens of an indirect lighting device. ＬＥＤライン照明から配光レンズに入射した光の配光を説明する断面図。Sectional drawing explaining the light distribution of the light which injected into the light distribution lens from LED line illumination. 縦軸を光度とし、横軸を壁面に対する入射角度とする配光レンズを透過した光の配光曲線を示すグラフ。The graph which shows the light distribution curve of the light which permeate | transmitted the light distribution lens which makes a vertical axis | shaft luminous intensity and makes a horizontal axis the incident angle with respect to a wall surface. ２つのＬＥＤライン照明を有する間接照明装置の変形例を示す簡略断面図。The simplified sectional view showing the modification of the indirect lighting device which has two LED line lighting. コーブ照明の間接照明装置の実施形態を示す簡略断面図。The simplified sectional view showing the embodiment of the indirect lighting device of cove lighting. 従来の間接照明装置の一例を示す簡略断面図。The simplified sectional view showing an example of the conventional indirect lighting device.

以下、間接照明装置１の最良の実施形態について、図１から図７を参照しつつ説明する。本実施形態の間接照明装置１は、例えばマンションや住宅等の居住建物の一部屋２に設置される。なお間接照明装置１の設置場所は居住建物の一部屋２に限られるものではなく、例えば廊下や階段などのスペースであっても良く、また、商業施設やオフィスに設置されても良い。間接照明装置１は、図１に示すように、部屋２を構成する天井面３の一辺に沿って形成された長尺の溝４ａ内に収納される照明ユニットであって、断面Ｃ字状に形成された長尺のフレーム１１と、このフレーム１１内に固定される基板１２と、この基板１２に複数並べて設置される複数のＬＥＤ１３からなるＬＥＤライン照明１４と、このＬＥＤライン照明１４の配光を制御する配光レンズ１５とにより構成されている。この間接照明装置１は、例えば一端が建物躯体に保持されている支持アーム１６によって溝４ａ内に固定されており、電気配線を通じて電気の供給を受けているが、固定方法はこれに限定されるものではなく、例えば、フレーム１１がそのまま建物躯体に図示しないボルト固定されるものであってもよい。   Hereinafter, the best embodiment of the indirect lighting device 1 will be described with reference to FIGS. 1 to 7. The indirect lighting device 1 of the present embodiment is installed in a room 2 of a residential building such as an apartment or a house. The installation place of the indirect lighting device 1 is not limited to one room 2 in a residential building, and may be a space such as a corridor or a staircase, or may be installed in a commercial facility or office. As shown in FIG. 1, the indirect lighting device 1 is a lighting unit housed in a long groove 4a formed along one side of a ceiling surface 3 constituting a room 2, and has a C-shaped cross section. The formed long frame 11, the substrate 12 fixed in the frame 11, the LED line illumination 14 composed of a plurality of LEDs 13 arranged side by side on the substrate 12, and the light distribution of the LED line illumination 14 And a light distribution lens 15 for controlling the above. The indirect lighting device 1 is fixed in the groove 4a by, for example, a support arm 16 having one end held by a building frame, and is supplied with electricity through electric wiring. However, the fixing method is limited to this. For example, the frame 11 may be fixed to a building frame with a bolt (not shown) as it is.

フレーム１１は図２、図３に示すように、発光するＬＥＤ１３の光を照射方向に集中させるために内面１１ａが白色又は鏡面状に加工された樹脂または金属製の枠体である。また基板１２は、このフレーム１１の内部に収納されて固定されており、長手方向にＬＥＤ１３を固定させるための複数のソケットが１列に並んで設置されている。そして、ＬＥＤ１３は１又は複数の発光するチップを組み合わせて所望の色温度に発光することが可能に構成した発光ダイオードであって、基板１２に設置されたソケットにそれぞれ１列に固定され、ＬＥＤライン照明１４を構成している。   As shown in FIGS. 2 and 3, the frame 11 is a resin or metal frame whose inner surface 11a is processed to be white or mirror-like in order to concentrate the light emitted from the LED 13 in the irradiation direction. The substrate 12 is housed and fixed inside the frame 11, and a plurality of sockets for fixing the LEDs 13 in the longitudinal direction are arranged in a line. The LEDs 13 are light-emitting diodes configured to be capable of emitting light at a desired color temperature by combining one or a plurality of light-emitting chips, and are fixed in a row to sockets installed on the substrate 12, respectively. The illumination 14 is comprised.

また、配光レンズ１５は、フレーム１１の開口側に嵌着する透明または半透明の長尺の樹脂体であって、ＬＥＤライン照明１４が射出する光の配光が所望の配光曲線になるように、その表面が曲線形状に形成されている。すなわち、予めＬＥＤライン照明１４から射出される光の配光曲線を測定し、このＬＥＤライン照明１４から直接配光レンズ１５に入射する光及びフレーム１１の内面１１ａで反射して配光レンズ１５に入射する光の配光特性を算出する。そして、配光レンズ１５は、これらの入射する光を屈折させて、下記の数２で表される配光曲線となるようにその表面形状が加工されている。ＬＥＤライン照明１４から射出された光は、図４に示すように、この配光レンズ１５を透過する際に配光制御され壁面５に入射し、反射光により部屋２内を照明する。   The light distribution lens 15 is a transparent or translucent long resin body fitted on the opening side of the frame 11, and the light distribution of the light emitted from the LED line illumination 14 becomes a desired light distribution curve. As shown, the surface is formed in a curved shape. That is, a light distribution curve of light emitted from the LED line illumination 14 is measured in advance, and the light directly incident on the light distribution lens 15 from the LED line illumination 14 and reflected by the inner surface 11a of the frame 11 are reflected on the light distribution lens 15. The light distribution characteristic of the incident light is calculated. And the surface shape of the light distribution lens 15 is processed so that the incident light is refracted and a light distribution curve represented by the following formula 2 is obtained. As shown in FIG. 4, the light emitted from the LED line illumination 14 is light-distributed when passing through the light distribution lens 15, enters the wall surface 5, and illuminates the interior of the room 2 with reflected light.

数２は、図４によく示されるように、光の壁面５に対する入射角θ°毎の配光レンズ１５を透過した光の光度Ｉ（ｃｄ）を示す数式であって、壁面５に入射する高さにおける法線照度をＥ（ｌｘ）とし、壁面５から光源までの水平距離をｄ（ｍｍ）としている。また変数ｎは、本実施形態においては３である。なお、数２から得られる配光曲線は図５の曲線Ａに示す通りである。

Figure 2011108496
As shown well in FIG. 4, Equation 2 is a mathematical expression indicating the luminous intensity I (cd) of the light transmitted through the light distribution lens 15 at each incident angle θ ° with respect to the wall surface 5 of light, and is incident on the wall surface 5. The normal illuminance at the height is E (lx), and the horizontal distance from the wall surface 5 to the light source is d (mm). The variable n is 3 in this embodiment. The light distribution curve obtained from Equation 2 is as shown by curve A in FIG.
Figure 2011108496

配光レンズ１５を透過した光は、図５に示すように、壁面５に対する入射角θが０°に近いほど、光度Ｉが強くなっている。すなわち、入射する高さが床面６に近づき、光源からの距離Ｈが離れ、入射角θが狭くなるほど、光度Ｉが強くなっている。したがって、図４の（Ａ）に示すように、光源から遠く又入射角θが比較的狭い床面６近傍には光度Ｉの強い光を入射させつつ、図４の（Ｂ）に示すように、光源から近く又入射角θが比較的広い天井面３近傍には光度Ｉの弱い光を入射させることで、壁面５の照明均斉度を良くすることができる。   As shown in FIG. 5, the light intensity I of the light transmitted through the light distribution lens 15 increases as the incident angle θ with respect to the wall surface 5 is closer to 0 °. That is, the light intensity I increases as the incident height approaches the floor surface 6, the distance H from the light source increases, and the incident angle θ decreases. Therefore, as shown in FIG. 4 (A), as shown in FIG. 4 (B), light having a strong intensity I is incident on the vicinity of the floor 6 which is far from the light source and has a relatively narrow incident angle θ. The illumination uniformity of the wall surface 5 can be improved by allowing light having a low light intensity I to enter the vicinity of the ceiling surface 3 close to the light source and having a relatively wide incident angle θ.

なお、数２の変数ｎは３である場合に壁面５の照明均斉度がもっとも良くなるが、例えば、他の照明環境や居住者の好みなどの要素によっては、ｎの値を１以上３以下の任意の数値としてもよい。なお、ｎの値が２の場合配光曲線は図５の曲線Ｂに示され、ｎの値が１の場合の配光曲線は図５の曲線Ｃに示される。   When the variable n in Equation 2 is 3, the illumination uniformity of the wall surface 5 is the best. For example, the value of n is 1 or more and 3 or less depending on factors such as other lighting environment and resident's preference. It is good also as arbitrary numerical values of. When the value of n is 2, the light distribution curve is shown by curve B in FIG. 5, and when the value of n is 1, the light distribution curve is shown by curve C in FIG.

本実施形態においては、１つのＬＥＤライン照明１４を用いた実施形態を示したが、ＬＥＤライン照明１４の数を２以上としてもよい。例えばＬＥＤライン照明１４の数を２とする場合には、図６に示すように、一方のＬＥＤライン照明１４ａを構成するＬＥＤ１３を寒色系の色に発光するＬＥＤ１３にするとともに、他方のＬＥＤライン照明１４ｂを暖色系の色に発光するＬＥＤ１３にすることができる。このように構成すると、例えば朝や昼間には寒色系の色に発光するＬＥＤライン照明１４ａを発光させるとともに、夜間は暖色系の色に発光するＬＥＤライン照明１４ｂを発光させることで、居住者の生活リズムに合わせて快適な色温度に発光する間接照明装置１を実現することができる。なお、例えばＬＥＤ１３そのものは同系色に発光するものを用い、一方の配光レンズ１５に色温度を変換するフィルムを貼付する構成としてもよい。なお、寒色系の色に発光するＬＥＤライン照明１４ａは例えば５０００ケルビン程度の色温度に発光するものであって、暖色系の色に発光するＬＥＤライン照明１４ｂは例えば３０００ケルビン程度の色温度に発光するものであることが好ましいが、居住者の好みや壁面５の色などによって、最適な色温度を選択するものであればよい。   In this embodiment, although the embodiment using one LED line illumination 14 was shown, the number of LED line illuminations 14 may be two or more. For example, when the number of the LED line illuminations 14 is 2, as shown in FIG. 6, the LED 13 constituting one LED line illumination 14a is changed to an LED 13 that emits light in a cool color, and the other LED line illumination 14 14b can be an LED 13 that emits light of a warm color. With this configuration, for example, the LED line illumination 14a that emits a cold color light is emitted in the morning or noon, and the LED line illumination 14b that emits a warm color light is emitted at night. The indirect lighting device 1 that emits light at a comfortable color temperature according to the life rhythm can be realized. For example, the LED 13 itself may be one that emits light of a similar color, and a film that converts the color temperature may be attached to one light distribution lens 15. The LED line illumination 14a that emits light in a cold color emits light at a color temperature of about 5000 Kelvin, for example, and the LED line illumination 14b that emits light in a warm color emits light at a color temperature of about 3000 Kelvin, for example. However, any color temperature may be selected as long as the optimum color temperature is selected according to the resident's preference and the color of the wall surface 5.

また、本実施形態においては、天井面３の一辺に沿って設けられた溝４ａ内に収納される照明ユニットであって、壁面５に光を照射するコーニス照明の間接照明装置１について説明したが、壁面５の上端に設けられ、天井面３を照射するコーブ照明の間接照明装置１であってもよい。   Moreover, in this embodiment, although it was an illumination unit accommodated in the groove | channel 4a provided along one side of the ceiling surface 3, it demonstrated the indirect illumination apparatus 1 of the cornice illumination which irradiates the wall surface 5 with light. The indirect illumination device 1 for cove illumination that is provided at the upper end of the wall surface 5 and irradiates the ceiling surface 3 may be used.

例えばコーブ照明の場合、壁面５の上端縁に沿って溝４ｂが形成されており、この溝４ｂ内に間接照明装置１が収納される。この間接照明装置１は、図７に示すように、上述のコーニス照明の場合と同様に、断面Ｃ字状に形成された長尺のフレーム１１と、このフレーム１１内に固定される基板１２と、この基板１２に複数並べて設置される複数のＬＥＤ１３からなるＬＥＤライン照明１４と、このＬＥＤライン照明１４の配光を制御する配光レンズ１５とにより構成されており、建物躯体に例えば支持アーム１６によって固定されている。ＬＥＤライン照明１４は例えば暖色系と寒色系の２つのＬＥＤライン照明１４ａ，１４ｂが配置されており、部屋２内の演出、居住者の好みなどの要素に応じて、一方または両方のＬＥＤライン照明１４ａ，１４ｂの点灯及び消灯を行う。   For example, in the case of cove illumination, a groove 4b is formed along the upper edge of the wall surface 5, and the indirect illumination device 1 is accommodated in the groove 4b. As shown in FIG. 7, the indirect lighting device 1 includes a long frame 11 having a C-shaped cross section, and a substrate 12 fixed in the frame 11, as in the case of the cornice lighting described above. The LED line illumination 14 is composed of a plurality of LEDs 13 installed side by side on the substrate 12 and a light distribution lens 15 for controlling the light distribution of the LED line illumination 14. It is fixed by. The LED line illumination 14 includes, for example, two warm-color and cold-color LED line illuminations 14a and 14b, and one or both of the LED line illuminations depending on factors such as the production in the room 2 and the preference of the resident. 14a and 14b are turned on and off.

そして、配光レンズ１５は、ＬＥＤライン照明１４から入射した光を、上述した数式２によって表される配光曲線に、変換可能に形成されている。なお、数２は、このコーブ照明においては、光の天井面３に対する入射角θ°毎の配光レンズ１５を透過した光の光度Ｉ（ｃｄ）を示す数式であって、天井面３に入射する位置における法線照度をＥ（ｌｘ）とし、天井から光源までの鉛直方向の距離をｄ（ｍｍ）としている。また変数ｎは、上述の実施形態と同様に３である。   The light distribution lens 15 is formed so that the light incident from the LED line illumination 14 can be converted into the light distribution curve represented by the above-described Expression 2. In this cove illumination, equation (2) is a mathematical expression indicating the luminous intensity I (cd) of light transmitted through the light distribution lens 15 at every incident angle θ ° with respect to the ceiling surface 3 of light, and is incident on the ceiling surface 3. The normal illuminance at the position to be used is E (lx), and the vertical distance from the ceiling to the light source is d (mm). The variable n is 3 as in the above embodiment.

このように構成することで、配光レンズ１５を透過した光は、天井面３に対する入射角θが０°に近いほど、光度Ｉが強くなっているので、光が入射する位置がこの間接照明装置１が設置された側と反対側にいくほど、光源であるＬＥＤライン照明１４からの距離が離れ、入射角θが狭くなるほど、光度Ｉが強くなる。したがって、入射角θが比較的狭い天井面３の間接照明装置１が設置された側の反対側には光度Ｉの強い光を入射させつつ、光源から近く又入射角θが比較的広い天井面３の間接照明装置１が設置された側には光度Ｉの弱い光を入射させることで、壁面５の照明均斉度を良くすることができる。   With this configuration, the light transmitted through the light distribution lens 15 has a greater luminous intensity I as the incident angle θ with respect to the ceiling surface 3 is closer to 0 °. The further away from the side where the apparatus 1 is installed, the farther away from the LED line illumination 14 which is the light source, and the smaller the incident angle θ, the stronger the luminous intensity I. Therefore, a ceiling surface close to the light source and having a relatively wide incident angle θ is incident on the opposite side of the ceiling surface 3 on which the indirect illumination device 1 is installed on the ceiling surface 3 having a relatively small incident angle θ while the light having a strong luminous intensity I is incident thereon. The light uniformity of the wall surface 5 can be improved by allowing light having a weak light intensity I to be incident on the side on which the indirect illumination device 1 is installed.

なお、上述の実施形態と同様に、数２の変数ｎは３である場合に壁面５の照明均斉度がもっとも良くなるが、ｎの値を１以上３以下の任意の数値としてもよい。   As in the above-described embodiment, when the variable n in Equation 2 is 3, the illumination uniformity of the wall surface 5 is the best, but the value of n may be any numerical value from 1 to 3.

なお、本発明の実施の形態は上述の形態に限ることなく、本発明の思想の範囲を逸脱しない範囲で適宜変更することができることは云うまでもない。   Needless to say, the embodiment of the present invention is not limited to the above-described embodiment, and can be appropriately changed without departing from the scope of the idea of the present invention.

本発明に係る間接照明装置１は、コーブ照明やコーニス照明などの部屋２を照明する間接照明装置１として好適に用いることができる。   The indirect lighting device 1 according to the present invention can be suitably used as the indirect lighting device 1 that illuminates the room 2 such as cove lighting or cornice lighting.

１ 間接照明装置
３ 天井面（面体）
４ 壁面（面体）
１３ ＬＥＤ
１４ ＬＥＤライン照明
１５ 配光レンズ 1 Indirect lighting device 3 Ceiling (face)
4 wall surfaces
13 LED
14 LED line illumination 15 Light distribution lens

Claims (4)

面体に照射し、その反射光により照明する間接照明装置であって、
前記面体の一方の端部にライン状に並べて設けられた複数のＬＥＤからなるＬＥＤライン照明と、
該ＬＥＤライン照明から射出される光の配光を制御する配光レンズと、を備え、
前記配光レンズは、予め算出された配光曲線により前記面体の照射面照度が均一になるように形成されたものであることを特徴とする間接照明装置。 An indirect illumination device that illuminates a face piece and illuminates it with its reflected light,
LED line illumination consisting of a plurality of LEDs arranged in a line at one end of the face piece,
A light distribution lens for controlling the light distribution of light emitted from the LED line illumination,
The indirect illumination device according to claim 1, wherein the light distribution lens is formed such that the illumination intensity of the irradiated surface of the face body is uniform according to a light distribution curve calculated in advance. 前記配光曲線は、
前記面体に対する入射角をθとし、
前記面体に入射する位置の法線照度をＥとし、
前記面体から光源までの距離をｄとし、
前記配光レンズを透過した光の光度をＩとした場合に、
ｎが１から３の範囲内の変数であって、
下記の数式で表されることを特徴とする請求項１に記載の間接照明装置。
Figure 2011108496
 The light distribution curve is
The incident angle with respect to the face body is θ,
The normal illuminance at the position incident on the face body is E,
The distance from the face body to the light source is d,
When the light intensity of the light transmitted through the light distribution lens is I,
n is a variable in the range of 1 to 3,
The indirect lighting device according to claim 1, wherein the indirect lighting device is represented by the following mathematical formula.
Figure 2011108496
 異なる色温度に発光する少なくとも２以上のＬＥＤライン照明を備え、
いずれか一方のＬＥＤライン照明を発光させることにより、発光色温度を変更可能であることを特徴とする請求項１または請求項２に記載の間接照明装置。 Comprising at least two LED line lights that emit light at different color temperatures;
The indirect illumination device according to claim 1, wherein the emission color temperature can be changed by causing any one of the LED line illuminations to emit light. 天井面を照射するコーブ照明又は壁面を照射するコーニス照明であることを特徴とする請求項１から請求項３のいずれかに記載の間接照明装置。   The indirect illumination device according to any one of claims 1 to 3, wherein the indirect illumination device is cove illumination for irradiating a ceiling surface or cornice illumination for illuminating a wall surface.
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