JP2007317431A - Lighting system - Google Patents

Lighting system Download PDF

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Publication number
JP2007317431A
JP2007317431A JP2006144216A JP2006144216A JP2007317431A JP 2007317431 A JP2007317431 A JP 2007317431A JP 2006144216 A JP2006144216 A JP 2006144216A JP 2006144216 A JP2006144216 A JP 2006144216A JP 2007317431 A JP2007317431 A JP 2007317431A
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Prior art keywords
light
light emitting
emitting diode
shielding body
reflecting mirror
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Hiroshige Haneda
博成 羽田
Hiroichi Kamei
宏市 亀井
Tomomi Matsuoka
智巳 松岡
Shinichi Ueda
信一 上田
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Ushio Denki KK
Ushio Inc
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Ushio Denki KK
Ushio Inc
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Priority to JP2006144216A priority Critical patent/JP2007317431A/en
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a lighting system for preventing one from being dazzled by providing a light shielding body in a reflecting mirror so that direct light radiated from a light-emitting diode is not radiated from the light emission opening of the reflecting mirror in the lighting system using the light-emitting diode for a light source. <P>SOLUTION: In the lighting system, the light-emitting diode 4 is arranged in the reflector 7 having the light emission opening 8 forward. The lighting system comprises: the light shielding body 5 that is in the reflecting mirror 7 and prevents direct light radiated from the luminous surface of the light-emitting diode 4 from being radiated to the outside of the light emission opening 8 of the reflecting mirror 7; and a reflection surface 6 of the light shielding body that is on the surface of the light shielding body 5 and reflects direct light radiated from the light-emitting diode 4 to the reflecting mirror 7. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

本発明は、発光ダイオードを光源として利用した照明装置に関する。   The present invention relates to an illumination device that uses a light emitting diode as a light source.

近年、省電力化、長寿命化を図るために、発光ダイオードを光源として利用した照明装置が用いられている。
しかし、発光ダイオードは、指向性の強い光を放射するために、発光ダイオードを光源とする照明装置は、直接照明装置を見た場合、発光ダイオードからの光が強く、眩しさを感じる。
そのため、例えば、特許文献１や特許文献２に示されるように、この眩しさを低減する目的で、発光ダイオードの中心軸から光が放射されず、側面発光する発光ダイオードを用いた照明装置が知られている。
特開２００３−８０８１号公報 特開２００４−２６５７３０号公報 In recent years, lighting devices using light-emitting diodes as light sources have been used in order to save power and extend the life.
However, since the light emitting diode emits light having a strong directivity, when the lighting device using the light emitting diode as a light source directly looks at the lighting device, the light from the light emitting diode is strong and feels dazzling.
Therefore, for example, as shown in Patent Document 1 and Patent Document 2, for the purpose of reducing this glare, an illumination device using a light emitting diode that emits side light without emitting light from the central axis of the light emitting diode is known. It has been.
JP 2003-8081 A JP 2004-265730 A

しかし、上記特許文献に示される照明装置では、発光ダイオードとして側面発光するものを用いているが、側面から放射された光の全てが反射鏡に照射されず、発光ダイオードから放射された光の一部が反射鏡の前方の光出射開口から直接放射される。この光は眩しさを感じさせ、確実に眩しさを抑制した照明装置の実現が望まれている。   However, in the illumination device disclosed in the above patent document, a light emitting diode that emits side light is used. However, not all of the light emitted from the side surface is irradiated on the reflecting mirror, and one of the light emitted from the light emitting diode is used. The part is directly emitted from the light exit opening in front of the reflecting mirror. It is desired to realize a lighting device that makes this light feel dazzling and reliably suppresses dazzling.

本発明の目的は、上記の問題点に鑑み、光源に発光ダイオードを用いた照明装置において、発光ダイオードから放射される直射光が、反射鏡の光出射開口から放射されないように、反射鏡内に遮光体を設け、眩しさを感じさせないようにした照明装置を提供することにある。   In view of the above problems, an object of the present invention is to provide a lighting device using a light emitting diode as a light source, so that direct light radiated from the light emitting diode is not radiated from the light exit aperture of the reflecting mirror. An object of the present invention is to provide a lighting device provided with a light-shielding body so as not to feel glare.

本発明は、上記の課題を解決するために、次のような手段を採用した。
第１の手段は、光出射開口を有する反射鏡内に発光ダイオードが配置された照明装置において、前記反射鏡内に、前記発光ダイオードの発光面から放射される直射光が、前記反射鏡の光出射開口外に放射されることを防止する遮光体を設け、該遮光体の表面に、前記発光ダイオードから放射される直射光を前記反射鏡に反射する遮光体反射面を有することを特徴とする照明装置である。
第２の手段は、第１の手段において、前記発光ダイオードと前記遮光体は、前記反射鏡の光軸上に配置されており、前記発光ダイオードは、中心部分に凹部を有するベースと、該ベースの凹部の底部に配置された発光素子と、該発光素子を覆うとともに前記ベースの凹部に充填された光透過性の充填材とからなり、前記遮光体は、光透過性であって、底面が前記発光ダイオードの発光面に接合され、前記底面とは反対側の表面に前記遮光体反射面を有し、前記遮光体反射面は、光軸を中心に対称形状であって、かつ前記発光ダイオードから離れるにしたがって光軸から離間する形状であることを特徴とする照明装置である。
第３の手段は、第２の手段において、前記遮光体反射面からの反射光は、前記反射鏡の反射面にのみ反射するようにしたことを特徴とする照明装置である。 The present invention employs the following means in order to solve the above problems.
The first means is a lighting device in which a light emitting diode is disposed in a reflecting mirror having a light exit opening, and the direct light emitted from the light emitting surface of the light emitting diode is reflected in the reflecting mirror. A light-shielding body that prevents radiation outside the emission opening is provided, and a light-shielding body reflecting surface that reflects direct light radiated from the light-emitting diode to the reflecting mirror is provided on the surface of the light-shielding body. It is a lighting device.
According to a second means, in the first means, the light emitting diode and the light shielding body are arranged on an optical axis of the reflecting mirror, and the light emitting diode includes a base having a concave portion in a central portion, and the base. A light-emitting element disposed at the bottom of the concave portion and a light-transmitting filler that covers the light-emitting element and is filled in the concave portion of the base. The light-shielding surface is joined to the light-emitting surface of the light-emitting diode, and has the light-shielding body reflecting surface on the surface opposite to the bottom surface. The light-shielding body reflecting surface is symmetrical about the optical axis, and the light-emitting diode The illumination device has a shape that is separated from the optical axis as it is separated from the optical axis.
A third means is an illuminating device according to the second means, wherein the reflected light from the light shielding body reflecting surface is reflected only on the reflecting surface of the reflecting mirror.

本発明によれば、反射鏡の光出射開口からは、発光ダイオードの直射光は出射されないので、照明装置から出射される光の眩しさを防止することができる。また、遮光体反射面からの反射光は、反射鏡の反射面にのみ反射し、発光ダイオードに反射されないので、発光ダイオードが昇温して、熱劣化することを防止することができる。   According to the present invention, since the direct light of the light emitting diode is not emitted from the light emission opening of the reflecting mirror, it is possible to prevent glare of the light emitted from the illumination device. Further, since the reflected light from the light shielding body reflecting surface is reflected only on the reflecting surface of the reflecting mirror and is not reflected on the light emitting diode, it is possible to prevent the light emitting diode from being heated and thermally deteriorated.

本発明の一実施形態を図１ないし図７を用いて説明する。
図１は、本実施形態の発明に係る照明装置の構成を示す正面図である。
同図において、１は口金、２は放熱ベース、３は回路基板、４は発光ダイオード、５は遮光体、６は遮光体５の遮光体反射面、７は反射鏡、８は反射鏡７の反射面、９は発光ダイオード４および遮光体反射面６から放射された光が反射鏡６の反射面８に反射されて放射される光出射開口である。 An embodiment of the present invention will be described with reference to FIGS.
FIG. 1 is a front view showing the configuration of the illumination device according to the invention of this embodiment.
In the figure, 1 is a base, 2 is a heat dissipation base, 3 is a circuit board, 4 is a light-emitting diode, 5 is a light-shielding body, 6 is a light-shielding body reflecting surface of the light-shielding body 5, 7 is a reflecting mirror, and 8 is a reflecting mirror 7. A reflecting surface 9 is a light emitting opening through which light emitted from the light emitting diode 4 and the light shielding body reflecting surface 6 is reflected by the reflecting surface 8 of the reflecting mirror 6 and emitted.

同図に示すように、この照明装置は、口金１から商用電源（ＡＣ１００Ｖ）を供給し、放熱ベース２内の回路基板３において、発光ダイオード駆動用の直流電圧に変換するとともに、発光ダイオード４に流れる電流が所定の電流となるように定電流制御する。放熱ベース２は熱伝導性の良いセラミック等の絶縁物で形成され、発光ダイオード４や回路基板３の熱を放熱するとともに、回路基板３等を外部と絶縁する役割を担っている。   As shown in the figure, this lighting device supplies commercial power (AC 100 V) from a base 1 and converts it into a DC voltage for driving a light emitting diode in a circuit board 3 in a heat radiating base 2. Constant current control is performed so that the flowing current becomes a predetermined current. The heat radiating base 2 is formed of an insulating material such as ceramic having good thermal conductivity, and radiates the heat of the light emitting diode 4 and the circuit board 3 and plays a role of insulating the circuit board 3 and the like from the outside.

図２（ａ）は、図１に示した発光ダイオード４を拡大して示した正面断面図、図２（ｂ）はその平面図である。
これらの図において、４１は中心部分に凹部を有するベース、４２はベース４１の凹部の底部に配置された発光素子、４３は発光素子３２を覆うとともにベース４１の凹部に充填された光透過性の充填材である。
発光素子４２の中心は、不図示の反射鏡７の光軸と一致している。発光素子４２は、充填材４３に混入された蛍光体を励起可能な波長（例えば、中心波長が４６０ｎｍまたはそれ以下の波長）で発光可能な材料（例えば、窒化ガリウム）によって形成されている。
充填材４３には蛍光物質が混入されており、白色光を出す場合は、発光面は充填材４３が存在する領域が発光面Ｌ１となり、充填材４３が透明な場合は、発光素子４２の表面領域が発光面Ｌ２となる。 2A is an enlarged front sectional view of the light emitting diode 4 shown in FIG. 1, and FIG. 2B is a plan view thereof.
In these drawings, reference numeral 41 denotes a base having a concave portion at the center, 42 denotes a light emitting element disposed at the bottom of the concave portion of the base 41, and 43 denotes a light transmitting element that covers the light emitting element 32 and is filled in the concave portion of the base 41. It is a filler.
The center of the light emitting element 42 coincides with the optical axis of the reflecting mirror 7 (not shown). The light emitting element 42 is formed of a material (for example, gallium nitride) that can emit light at a wavelength that can excite the phosphor mixed in the filler 43 (for example, the center wavelength is 460 nm or less).
The phosphor 43 is mixed in the filler 43, and when emitting white light, the area where the filler 43 is present becomes the light emitting surface L1 in the light emitting surface, and when the filler 43 is transparent, the surface of the light emitting element 42 is obtained. The region becomes the light emitting surface L2.

図３（ａ）は、発光素子４２を４個用いた場合の発光ダイオード４を拡大して示した平面図、図３（ｂ）はその正面断面図である。
これらの図の４個の発光素子４２は、不図示の反射鏡７の光軸Ｘを中心に対称に配置されている。
これらの図において、充填材４３には蛍光物質が混入されており、白色光を出す場合は、発光面は充填材４３が存在する領域が発光面Ｌ１となり、充填材４３が透明な場合は、４個の発光素子４２の表面領域が発光面Ｌ２となる。 3A is an enlarged plan view showing the light emitting diode 4 when four light emitting elements 42 are used, and FIG. 3B is a front sectional view thereof.
The four light emitting elements 42 in these figures are arranged symmetrically about the optical axis X of the reflecting mirror 7 (not shown).
In these figures, the fluorescent material is mixed in the filler 43, and when emitting white light, the region where the filler 43 exists is the light emitting surface L1, and when the filler 43 is transparent, The surface regions of the four light emitting elements 42 become the light emitting surface L2.

図４は、図１に示した発光ダイオード４、遮光体５および反射鏡７を拡大して示した正面断面図である。
同図において、遮光体５は、エポキシ樹脂やシリコン樹脂等の光透過性の樹脂により形成されており、その表面には光軸Ｘを中心に三角錐形状の凹部を有しており、反射鏡７の光出射開口８から、発光ダイオード４の直射光が出射することを防止する位置に設けられている。 FIG. 4 is an enlarged front sectional view showing the light-emitting diode 4, the light shield 5 and the reflecting mirror 7 shown in FIG.
In the figure, the light shield 5 is formed of a light transmissive resin such as an epoxy resin or a silicon resin, and has a concave surface having a triangular pyramid shape around the optical axis X on its surface. 7 is provided at a position that prevents direct light from the light emitting diode 4 from being emitted from the light emission opening 8.

また、遮光体５は、光透過性の略柱状体からなり、発光ダイオード４の発光面（充填材４の表面）に直接透明なエポキシ樹脂またはシリコン樹脂によって接着されており、遮光体５の発光ダイオード４の発光面に直接接合される面とは反対側の表面に、遮光体反射面６を有している。
遮光体反射面６は、発光ダイオード４から離れるにしたがって光軸から離間する形状を有しており、金属蒸着膜（例えば、ＡＬ、Ａｇ等）や誘電体多層膜（例えば、ＳｉＯ２／ＴｉＯ２ ）によって形成されている。 The light shielding body 5 is formed of a substantially light-transmitting columnar body, and is directly bonded to the light emitting surface of the light emitting diode 4 (the surface of the filler 4) with a transparent epoxy resin or silicon resin. The light-shielding body reflecting surface 6 is provided on the surface opposite to the surface directly joined to the light emitting surface of the diode 4.
The light-shielding body reflecting surface 6 has a shape that is separated from the optical axis as it is away from the light emitting diode 4, and is a metal vapor deposition film (for example, AL, Ag, etc.) or a dielectric multilayer film (for example, SiO 2 / TiO 2). ).

図５は、反射鏡７の光出射開口９から放射される光を説明するための図である。
まず、発光ダイオード４から放射された光の一部は光透過性の遮光体５を通って反射鏡７の反射面８で反射されて光出射開口９の外部に放射される。
また、発光ダイオード４から放射された光の残部は光透過性の遮光体５を通って遮光体反射面６において反射され、再び光透過性の遮光体５を通って反射鏡７の反射面８で反射されて光出射開口９の外部に放射される。 FIG. 5 is a view for explaining light emitted from the light exit aperture 9 of the reflecting mirror 7.
First, a part of the light emitted from the light emitting diode 4 is reflected by the reflecting surface 8 of the reflecting mirror 7 through the light-transmitting light-shielding body 5 and emitted outside the light emitting opening 9.
Further, the remainder of the light emitted from the light emitting diode 4 passes through the light transmissive light shield 5 and is reflected by the light shield reflective surface 6, and again passes through the light transmissive light shield 5 to reflect the reflective surface 8 of the reflecting mirror 7. And is radiated to the outside of the light exit opening 9.

その結果、反射鏡７の光出射開口９からは、発光ダイオード４の直射光は出射されないので、照明装置から出射される光で眩しさを感ずることがない。また、遮光体反射面６からの反射光は、反射鏡７の反射面８にのみ反射し、発光ダイオード４に反射されないので、発光ダイオード４が昇温して、熱劣化することを防止することができる。   As a result, since the direct light of the light emitting diode 4 is not emitted from the light exit aperture 9 of the reflecting mirror 7, the glare is not felt by the light emitted from the illumination device. Further, the reflected light from the light-shielding body reflecting surface 6 is reflected only on the reflecting surface 8 of the reflecting mirror 7 and is not reflected on the light-emitting diode 4, thereby preventing the light-emitting diode 4 from being heated and thermally deteriorated. Can do.

図６は、遮光体５の他の構造（Ｍｏｄｅｌ１〜Ｍｏｄｅｌ４）を示す図である。
同図において、遮光体反射面６（破線箇所で示す曲率のある凹部）は反射率９５％に設定されている。 FIG. 6 is a view showing another structure (Model 1 to Model 4) of the light blocking body 5. As shown in FIG.
In the figure, the light-shielding body reflection surface 6 (a concave portion having a curvature indicated by a broken line) is set to a reflectance of 95%.

図７はＭｏｄｅｌ１〜Ｍｏｄｅｌ４の配光分布を示す図である。
同図に示すように、遮光体５の遮光体反射面６で反射した光は、水平（０°）から上方に反射するように設計されており、遮光体反射面６で反射した光は、反射鏡７の反射面８に向けて反射されていることが分かる。 FIG. 7 is a diagram showing a light distribution of Models 1 to 4.
As shown in the figure, the light reflected by the light shielding body reflecting surface 6 of the light shielding body 5 is designed to be reflected upward from the horizontal (0 °), and the light reflected by the light shielding body reflecting surface 6 is It can be seen that the light is reflected toward the reflecting surface 8 of the reflecting mirror 7.

本発明に係る照明装置の構成を示す正面図である。It is a front view which shows the structure of the illuminating device which concerns on this invention. 図１に示した発光ダイオード４を拡大して示した正面断面図および平面図である。It is the front sectional view and the top view which expanded and showed the light emitting diode 4 shown in FIG. 発光素子４２を４個用いた場合の発光ダイオード４を拡大して示した平面図および正面断面図である。It is the top view and front sectional drawing which expanded and showed the light emitting diode 4 at the time of using the four light emitting elements 42. FIG. 図１に示した発光ダイオード４、遮光体５および反射鏡７を拡大して示した正面断面図である。It is front sectional drawing which expanded and showed the light emitting diode 4, the light-shielding body 5, and the reflective mirror 7 which were shown in FIG. 反射鏡７の光出射開口９から放射される光を説明するための図である。It is a figure for demonstrating the light radiated | emitted from the light-projection opening 9 of the reflective mirror 7. FIG. 遮光体５の他の構造（Ｍｏｄｅｌ１〜Ｍｏｄｅｌ４）を示す図である。It is a figure which shows the other structure (Model1-Model4) of the light-shielding body. Ｍｏｄｅｌ１〜Ｍｏｄｅｌ４の配光分布を示す図である。It is a figure which shows the light distribution of Model1-Model4.

符号の説明Explanation of symbols

１ 口金
２ 放熱ベース
３ 回路基板
４ 発光ダイオード
４１ ベース
４２ 発光素子
４３ 充填材
５ 遮光体
６ 遮光体反射面
７ 反射鏡
８ 反射鏡反射面
９ 光出射開口
DESCRIPTION OF SYMBOLS 1 Base 2 Radiation base 3 Circuit board 4 Light emitting diode 41 Base 42 Light emitting element 43 Filler 5 Light shielding body 6 Light shielding body reflecting surface 7 Reflecting mirror 8 Reflecting mirror reflecting surface 9 Light emission opening

Claims (3)

光出射開口を有する反射鏡内に発光ダイオードが配置された照明装置において、
前記反射鏡内に、前記発光ダイオードの発光面から放射される直射光が、前記反射鏡の光出射開口外に放射されることを防止する遮光体を設け、該遮光体の表面に、前記発光ダイオードから放射される直射光を前記反射鏡に反射する遮光体反射面を有することを特徴とする照明装置。 In an illumination device in which a light emitting diode is arranged in a reflecting mirror having a light exit aperture,
A light shielding body is provided in the reflecting mirror to prevent direct light radiated from the light emitting surface of the light emitting diode from being radiated out of the light exit opening of the reflecting mirror, and the light emission is provided on the surface of the light shielding body. An illuminating device comprising a light-shielding body reflecting surface that reflects direct light emitted from a diode to the reflecting mirror. 前記発光ダイオードと前記遮光体は、前記反射鏡の光軸上に配置されており、
前記発光ダイオードは、中心部分に凹部を有するベースと、該ベースの凹部の底部に配置された発光素子と、該発光素子を覆うとともに前記ベースの凹部に充填された光透過性の充填材とからなり、
前記遮光体は、光透過性であって、底面が前記発光ダイオードの発光面に接合され、前記底面とは反対側の表面に前記遮光体反射面を有し、
前記遮光体反射面は、光軸を中心に対称形状であって、かつ前記発光ダイオードから離れるにしたがって光軸から離間する形状であることを特徴とする請求項１に記載の照明装置。 The light emitting diode and the light blocking body are disposed on the optical axis of the reflecting mirror,
The light emitting diode includes a base having a concave portion at a central portion, a light emitting element disposed at the bottom of the concave portion of the base, and a light-transmitting filler that covers the light emitting element and is filled in the concave portion of the base. Become
The light shielding body is light transmissive, and a bottom surface is joined to a light emitting surface of the light emitting diode, and the light shielding body reflecting surface is provided on a surface opposite to the bottom surface,
The lighting device according to claim 1, wherein the light-shielding body reflecting surface has a symmetrical shape about an optical axis and is separated from the optical axis as the distance from the light emitting diode is increased. 前記遮光体反射面からの反射光は、前記反射鏡の反射面にのみ反射するようにしたことを特徴とする請求項２に記載の照明装置。







The illuminating device according to claim 2, wherein the reflected light from the reflecting surface of the light shielding body is reflected only on the reflecting surface of the reflecting mirror.







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