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JP2004186109A - Light emitting diode light source and light emitting diode lighting equipment - Google Patents

Light emitting diode light source and light emitting diode lighting equipment Download PDF

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Publication number
JP2004186109A
JP2004186109A JP2002354829A JP2002354829A JP2004186109A JP 2004186109 A JP2004186109 A JP 2004186109A JP 2002354829 A JP2002354829 A JP 2002354829A JP 2002354829 A JP2002354829 A JP 2002354829A JP 2004186109 A JP2004186109 A JP 2004186109A
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emitting diode
light
light emitting
base
light source
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JP4135485B2 (en
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Iwatomo Moriyama
厳與 森山
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Toshiba Lighting and Technology Corp
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Toshiba Lighting and Technology Corp
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21K—NON-ELECTRIC LIGHT SOURCES USING LUMINESCENCE; LIGHT SOURCES USING ELECTROCHEMILUMINESCENCE; LIGHT SOURCES USING CHARGES OF COMBUSTIBLE MATERIAL; LIGHT SOURCES USING SEMICONDUCTOR DEVICES AS LIGHT-GENERATING ELEMENTS; LIGHT SOURCES NOT OTHERWISE PROVIDED FOR
    • F21K9/00—Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers
    • F21K9/20—Light sources comprising attachment means
    • F21K9/23—Retrofit light sources for lighting devices with a single fitting for each light source, e.g. for substitution of incandescent lamps with bayonet or threaded fittings
    • F21K9/232—Retrofit light sources for lighting devices with a single fitting for each light source, e.g. for substitution of incandescent lamps with bayonet or threaded fittings specially adapted for generating an essentially omnidirectional light distribution, e.g. with a glass bulb
    • 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
    • F21V3/00—Globes; Bowls; Cover glasses
    • 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
    • F21V3/00—Globes; Bowls; Cover glasses
    • F21V3/02—Globes; Bowls; Cover glasses characterised by the shape
    • 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)
  • Physics & Mathematics (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Optics & Photonics (AREA)
  • General Engineering & Computer Science (AREA)
  • Led Device Packages (AREA)
  • Arrangement Of Elements, Cooling, Sealing, Or The Like Of Lighting Devices (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)

Abstract

【課題】外囲器を均等拡散発光させることができるようにする。
【解決手段】口金１３と、口金１３に配置された発光ダイオード支持体１４と、この発光ダイオード支持体１４の端面中心部に支持された発光ダイオード１５と、口金１３に固定されるネック部１６ｃ及び発光ダイオード１５から発光される光を拡散する拡散領域部１６を有する外囲器１７とを具備し、発光ダイオード１５はランバーシャンの配光曲線を有し、外囲器１７の拡散領域部１６の外形形状は発光ダイオード１５の配光曲線に相似する略球形の形状に定められ、発光ダイオード１５は、外囲器１７が有するネック部１６ｃと拡散領域部１６との間に形成された境界部１６ｂの近傍に配置されている。したがって、ランバーシャンの配光曲線を有する発光ダイオード１５の出力をそのまま外囲器１７上に投影されるため、外囲器１７を略均等拡散発光させることができる。
【選択図】 図２An object of the present invention is to enable an envelope to emit light uniformly.
A light-emitting diode support (14) disposed on the base (13), a light-emitting diode (15) supported at the center of the end face of the light-emitting diode support (14), a neck (16c) fixed to the base (13), and An envelope 17 having a diffusion region portion 16 for diffusing light emitted from the light-emitting diode 15; the light-emitting diode 15 has a Lambertian light distribution curve; The external shape is determined to be a substantially spherical shape similar to the light distribution curve of the light emitting diode 15, and the light emitting diode 15 has a boundary portion 16b formed between the neck portion 16c of the envelope 17 and the diffusion region portion 16. Is arranged in the vicinity of. Therefore, since the output of the light emitting diode 15 having the light distribution curve of the Lambertian is projected onto the envelope 17 as it is, the envelope 17 can emit substantially uniformly diffused light.
[Selection] Fig. 2

Description

【０００１】
【発明の属する技術分野】本発明は、口金に封着された外囲器内に設けた発光ダイオードを発光させる発光ダイオード光源及び発光ダイオード照明器具に関する。
【０００２】
【従来の技術】従来、口金に封着された外囲器内に設けた発光ダイオードを発光させる発光ダイオード光源が知られている（特許文献１、特許文献２参照）。
【０００３】
【特許文献１】実公平４−１６４５５号公報
【特許文献２】特表２００２−５２５８１４公報
【発明が解決しようとする課題】特許文献１及び特許文献２に記載された発光ダイオード光源は、バルブなどと称される外囲器に複数の発光ダイオードを具備する構造であるため、発光ダイオードの配光を、その発光ダイオードの表面積より大きな表面積の拡散面（外囲器の内面）に投影する場合、輝度ムラを生じ、外囲器を均等拡散発光させることは容易ではない。
【０００４】
また、発光ダイオードの単位面積（容積）当りの発熱量が大きくなると、密閉された外囲器内部の温度が上昇し、その結果、発光ダイオードのジャンクション温度の最大定格値を越え、最悪の場合には発光ダイオードを発光させることができない。
【０００５】
本発明の目的は、外囲器を均等拡散発光させることができ、さらに、定格電流を通電するために簡単な構造で発光ダイオードからの熱を放熱させ得る発光ダイオード光源を提供することである。
【０００６】
本発明の目的は、発光ダイオード光源の放熱作用をさらに促進し、発光ダイオード光源に定格電流以上の電流を通電し得る発光ダイオード照明器具を提供することである。
【０００７】
【課題を解決するための手段】請求項１記載の発光ダイオード光源は、口金と；前記口金に配置された発光ダイオード支持体と；前記口金と電気的に接続され、前記発光ダイオード支持体の前記口金とは反対側に配置された発光ダイオードと；前記口金に固定されるネック部、前記発光ダイオードから発光される光を拡散する拡散領域部、及び前記ネック部と前記拡散領域部との間に形成される境界部を有してなる透光性の外囲器と；を具備し、前記発光ダイオードはランバーシャンの配光曲線を有し、前記外囲器の前記拡散領域部の外形形状は前記発光ダイオードの配光曲線に相似する略球形の形状に定められ、前記発光ダイオードは前記境界部近傍に配置されている。
【０００８】
ここで、透光性の外囲器は、合成樹脂、ガラス、陶器などにより形成されたものを含む。また、境界部近傍とは、発光ダイオードから発光される光を略均等に拡散させることができる範囲を言う。
【０００９】
したがって、ランバーシャンの配光曲線を有する発光ダイオードの出力をそのまま外囲器上に投影させることが可能となるため、外囲器を略均等拡散発光させることが可能となる。
【００１０】
請求項２記載の発明は、請求項１記載の発光ダイオード光源において、前記発光ダイオード支持体は熱伝導性材料により形成され、一端が前記口金に熱的に接続され他端が前記発光ダイオードに熱的に接続されている。
【００１１】
ここで、口金及び発光ダイオード支持体は、アルミニウムや銅などの金属、又はアルミニウムや銅の何れか一つを組み合わせた合金により形成されたものを含む。また、口金と発光ダイオード支持体とを熱的に接続する手段は、両者の間を熱伝導材料を介して接続する手段と、両者を直接接触させる手段とを含む。後者の場合は両者に螺子を形成して螺合させる構造を採用して接触面積を拡大することが熱伝導性の面で好ましい。さらに、発光ダイオード支持体と発光ダイオードとを熱的に接続する手段は、両者の間を熱伝導材料を介して接続する手段を含む。口金と発光ダイオード支持体との間、及び発光ダイオード支持体と発光ダイオードとの間を熱的に接続する熱伝導材料は、ジメチルシリコン、メチルフェニルシリコン、アルキル変性シリコン又はフロロシリコンに、熱伝導性に優れた亜鉛華などの金属酸化物を配合した熱伝導性シリコンを含む。
【００１２】
したがって、発光ダイオードの熱を発光ダイオード支持体を介して口金に伝導させる簡単な構造で発光ダイオードの温度を下げることが可能となる。
【００１３】
請求項３記載の発光ダイオード照明器具は、請求項１又は２記載の発光ダイオード光源と；電源に接続される点灯回路と；前記発光ダイオード光源の前記口金を前記点灯回路に接続する接続部と；前記発光ダイオード光源の前記発光ダイオードから前記口金を介して前記接続部に伝導される熱を放熱するヒートシンクと；前記接続部に接続される前記発光ダイオード光源と前記ヒートシンクと前記点灯回路とを収容する器具本体と；を具備する。
【００１４】
ここで、ヒートシンクは、発光ダイオード光源からの光を反射する反射板と同一材料により一体に形成された構成を含む。
【００１５】
したがって、発光ダイオード光源の放熱を促進し、定格電流以上の電流を発光ダイオード光源に通電することが可能となる。
【００１６】
【発明の実施の形態】本発明の一実施の形態を図面に基づいて説明する。図１は発光ダイオード照明器具の縦断側面図、図２は一部を断面にして示す発光ダイオード光源の側面図、図３は一部を断面にして示す発光ダイオード光源の側面図である。
【００１７】
発光ダイオード照明器具１の一構成部品である板金製の器具本体２は、天井３の開口部４に装着し得るように下面が開口された筒状の形状に形成されている。この器具本体２には天井３の開口部４の周縁に当接される化粧枠５が着脱可能に設けられ、また、外周面にはこの器具本体２を天井３に固定するための複数の板ばね６が取り付けられている。これらの板ばね６は、図１において仮想線で示すように内方に撓まされた状態で器具本体２とともに天井３の開口部４に挿入され、その挿入後は自らの弾性により外側に復帰して開口部４の内面を圧接し、その圧接力により器具本体２を天井３に固定するように構成されている。
【００１８】
器具本体２の内部には、端子台７と、点灯回路８と、電池９とが組み込まれている。前述の化粧枠５は、発光ダイオード光源Ｌとその上部空間との間を遮蔽する遮光板を兼ねた反射板５ａと、この反射板５ａの裏面に配設された複数のフィン５ｂとを一体に有し、放熱性の優れた合成樹脂やアルミニウムなどの金属材により形成されている。すなわち、背面にフィン５ｂが一体に形成された反射板５ａ及び化粧枠５は、発光ダイオード光源Ｌが発熱する熱が伝導されたときに、その熱を放熱するヒートシンクでもある。もちろん、反射板５ａに対して熱的に接続されたヒートシンクを別個に設けても構わない。反射板５ａの一面には、発光ダイオード光源Ｌからの光を器具本体２の開口面側に向けて反射する反射面５ｃが形成されている。また、反射板５ａの下面には、熱伝導性が良好な材料により形成された筒状の熱伝導部１０が設けられ、この熱伝導部１０の内部には、発光ダイオード光源Ｌを点灯回路８又は電池９に選択的に接続するための接続部であるソケット１１が熱伝導部１０に対して熱的に接続された状態で設けられている。なお、熱伝導部１０は、反射板５ａと同一材料によって一体に連続させて形成してもよく、或いは、熱伝導性の高い材料により別個に形成されて反射板５ａとは熱的に接続した構成でもよい。
【００１９】
次に、図２を参照して発光ダイオード光源Ｌの構成について説明する。発光ダイオード光源Ｌは、前述したソケット１１に螺合される螺子１２が外周に形成された口金１３と、この口金１３の中心線上に配置された棒状の発光ダイオード支持体１４と、口金１３とは電気的に接続され発光ダイオード支持体１４の口金１３とは反対側の端面中心部に支持された一つの発光ダイオード１５と、発光ダイオード１５から発光される光を拡散する拡散領域部１６を有する外囲器であるグローブ１７とを具備する。このグローブ１７は、拡散領域部１６の頂部１６ａとは反対側の境界部１６ｂから連続して形成したネック部１６ｃにより口金１３を封着状態で固定するように構成されている。
【００２０】
本実施の形態における発光ダイオード支持体１４は、例えばアルミニウムや銅など金属、それらを含む合金などの熱伝導性材料により形成され、口金１３に対しては熱伝導性シリコン１８により熱的に接続され、発光ダイオード１５に対しては熱伝導性シリコン１９により熱的に接続されている。
【００２１】
ここで、発光ダイオード１５はランバーシャンの配光曲線を有する。すなわち、図２において、発光ダイオード１５から放射方向に示す矢印の長さは光の強度を示すもので、放射方向が口金１３の中心線に近いほど光の強度が高く、放射方向の中心線に対する角度が広がるほど弱くなる。グローブ１７の拡散領域部１６の外形形状は発光ダイオード１５の配光曲線に相似する略球形の形状に定められている。この拡散領域部１６の内面には光の拡散面を得るために梨地処理が施されている。そして、発光ダイオード１５は、ネック部１６ｃと拡散領域部１６との間に形成される境界部１６ｂに配置されている。
【００２２】
口金１３と発光ダイオード支持体１４とを熱的に接続する手段は、図２に示すように、両者の間を例えば熱伝導性シリコン１８などの熱伝導材料を介して接続する手段の他に、両者を直接接触させる手段を含む。後者の場合は、図３に示すように、口金１３の螺子１２に螺合する螺子１４ａを発光ダイオード支持体１４に形成することにより、口金１３と発光ダイオード支持体１４との接触面積を拡大する構成を採用することが熱伝導性の面で好ましい。
【００２３】
本実施の形態におけるグローブ１７は、口金１３に固定されるためのネック部１６ｃが長い円筒形状の部分を有するために洋梨型の形状となっているが、ネック部１６ｃは口金１３に固定されるためのものであるため、円筒形状の部分を有しないネック部を拡散領域部１６の境界部１６ｂに連続して形成した略球形形状のグローブを用いてもよい。この場合でも発光ダイオード１５をネック部１６ｃと拡散領域部１６との間に形成される境界部１６ｂの近傍に配置するように、発光ダイオード支持体１４の長さを決定する。
【００２４】
このような構成において、発光ダイオード光源Ｌの口金１３は発光ダイオード照明器具１のソケット１１に接続され、点灯回路８を介して商用電源に接続されて発光するが、停電などの非常時には電池９に接続されて発光する。
【００２５】
この場合、発光ダイオード１５はランバーシャンの配光曲線を有し、グローブ１７の拡散領域部１６の外形形状は発光ダイオード１５の配光曲線に相似する略球形の形状に定められ、発光ダイオード１５はネック部１６ｃと拡散領域部１６との境界部１６ｂの近傍に配置されているので、ランバーシャンの配光曲線を有する発光ダイオード１５の出力がそのままグローブ１７上に投影される。したがって、グローブ１７の拡散領域部１６を略均等拡散発光させることができる。
【００２６】
さらに、発光ダイオード支持体１４は熱伝導性材料により形成され、一端が口金１３に熱的に接続され他端が発光ダイオード１５に熱的に接続されているので、発光ダイオード１５の熱を発光ダイオード支持体１４を介して口金１３に伝導させる簡単な構造で発光ダイオード１５の温度を下げることができる。これにより、発光ダイオード１５を、そのジャンクション温度の最大定格値内で、一定温度で発光させることができる。さらに、口金１３に伝導された熱を反射板５ａでもあるヒートシンクに伝導して放熱させることができ、反射板５ａから化粧枠５を介して板金製の器具本体２に伝導して放熱させることができるので、発光ダイオード１５に生ずる熱の放熱作用をさらに促進することができ、したがって、定格電流以上の電流を発光ダイオード光源Ｌに通電して照明のための光量を高めることができる。
【００２７】
【発明の効果】請求項１記載の発光ダイオード光源によれば、発光ダイオードはランバーシャンの配光曲線を有し、外囲器の拡散領域部の外形形状は発光ダイオードの配光曲線に相似する略球形の形状に定められ、発光ダイオードはネック部と拡散領域部との間に形成された境界部近傍に配置されているので、ランバーシャンの配光曲線を有する発光ダイオードの出力をそのまま外囲器上に投影されるため、外囲器を略均等拡散発光させることができる。
【００２８】
請求項２記載の発明によれば、請求項１記載の発光ダイオード光源において、発光ダイオード支持体は熱伝導性材料により形成され、一端が口金に熱的に接続され他端が発光ダイオードに熱的に接続されているので、発光ダイオードの熱を発光ダイオード支持体を介して口金に伝導させる簡単な構造で発光ダイオードの温度を下げることができる。これにより、発光ダイオードを、そのジャンクション温度の最大定格値内で、一定温度で発光させることができ、したがって、発光ダイオード光源の出力を安定させ、寿命を延長させることができる。
【００２９】
請求項３記載の発光ダイオード照明器具によれば、請求項１又は２記載の発光ダイオード光源の発光ダイオードから口金を介して接続部に伝導される熱を放熱するヒートシンクを具備するので、発光ダイオード光源の放熱をさらに促進することができ、したがって、定格電流以上の電流を発光ダイオード光源に通電して照明のための光量を高めることができる。
【図面の簡単な説明】
【図１】本発明の一実施の形態における発光ダイオード照明器具の縦断側面図である。
【図２】一部を断面にして示す発光ダイオード光源の側面図である。
【図３】一部を断面にして示す発光ダイオード光源の側面図である。
【符号の説明】
２：器具本体、５，５ａ：ヒートシンク、８：点灯回路、１１：接続部、１３：口金、１４：発光ダイオード支持体、１５：発光ダイオード、１６：拡散領域部、１６ｂ：境界部、１６ｃ：ネック部、１７：外囲器、Ｌ：発光ダイオード光源[0001]
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a light emitting diode light source for emitting light from a light emitting diode provided in an envelope sealed to a base and a light emitting diode lighting apparatus.
[0002]
2. Description of the Related Art Conventionally, a light emitting diode light source for emitting a light emitting diode provided in an envelope sealed to a base has been known (see Patent Documents 1 and 2).
[0003]
[Patent Document 1] Japanese Utility Model Publication No. 4-16455 [Patent Document 2] Japanese Patent Application Publication No. 2002-525814 [Problems to be Solved by the Invention] The light emitting diode light sources described in Patent Documents 1 and 2 include bulbs and the like. When the light distribution of the light emitting diode is projected onto a diffusion surface (the inner surface of the envelope) having a surface area larger than the surface area of the light emitting diode, the light emitting diode has a structure including a plurality of light emitting diodes. It is not easy to cause uneven brightness and to cause the envelope to emit light uniformly.
[0004]
Also, when the heat generation per unit area (volume) of the light emitting diode increases, the temperature inside the sealed enclosure rises, and as a result, exceeds the maximum rating of the junction temperature of the light emitting diode. Cannot cause the light emitting diode to emit light.
[0005]
SUMMARY OF THE INVENTION It is an object of the present invention to provide a light emitting diode light source capable of emitting light from a light emitting diode with a simple structure so that an envelope can be uniformly diffused and a rated current can be supplied.
[0006]
SUMMARY OF THE INVENTION An object of the present invention is to provide a light-emitting diode luminaire capable of further promoting the heat radiation action of the light-emitting diode light source and supplying a current equal to or higher than the rated current to the light-emitting diode light source.
[0007]
The light-emitting diode light source according to claim 1, further comprising: a base; a light-emitting diode support disposed on the base; and a light-emitting diode support electrically connected to the base. A light-emitting diode disposed on the side opposite to the base; a neck fixed to the base, a diffusion region for diffusing light emitted from the light-emitting diode, and between the neck and the diffusion region. A light-transmitting envelope having a formed boundary; wherein the light-emitting diode has a Lambertian light distribution curve, and the outer shape of the diffusion region of the envelope is The light emitting diode has a substantially spherical shape similar to a light distribution curve of the light emitting diode, and the light emitting diode is arranged near the boundary.
[0008]
Here, the translucent envelope includes those formed of synthetic resin, glass, pottery, and the like. Further, the vicinity of the boundary means a range in which light emitted from the light emitting diode can be diffused substantially uniformly.
[0009]
Therefore, the output of the light emitting diode having the light distribution curve of the Lambertian can be projected onto the envelope as it is, so that the envelope can emit substantially uniformly diffused light.
[0010]
According to a second aspect of the present invention, in the light emitting diode light source according to the first aspect, the light emitting diode support is formed of a heat conductive material, and one end is thermally connected to the base and the other end is thermally connected to the light emitting diode. Connected.
[0011]
Here, the base and the light emitting diode support include those formed of a metal such as aluminum or copper, or an alloy obtained by combining any one of aluminum and copper. The means for thermally connecting the base and the light-emitting diode support includes a means for connecting the both via a heat conductive material, and a means for bringing the two into direct contact. In the latter case, it is preferable from the viewpoint of thermal conductivity to increase the contact area by adopting a structure in which a screw is formed and screwed together. Further, the means for thermally connecting the light emitting diode support and the light emitting diode includes means for connecting the both via a heat conductive material. The thermally conductive material that thermally connects between the base and the light emitting diode support, and between the light emitting diode support and the light emitting diode, is dimethylsilicon, methylphenylsilicon, alkyl-modified silicon or fluorosilicon. Including thermally conductive silicon blended with a metal oxide such as zinc white.
[0012]
Therefore, it is possible to lower the temperature of the light emitting diode with a simple structure that conducts heat of the light emitting diode to the base via the light emitting diode support.
[0013]
A light emitting diode lighting device according to claim 3, wherein the light emitting diode light source according to claim 1 or 2; a lighting circuit connected to a power supply; and a connecting portion connecting the base of the light emitting diode light source to the lighting circuit; A heat sink for dissipating heat conducted from the light emitting diode of the light emitting diode light source to the connection portion via the base; and housing the light emitting diode light source connected to the connection portion, the heat sink, and the lighting circuit. An instrument body.
[0014]
Here, the heat sink includes a structure integrally formed of the same material as a reflector that reflects light from the light emitting diode light source.
[0015]
Therefore, heat radiation of the light emitting diode light source is promoted, and a current equal to or higher than the rated current can be supplied to the light emitting diode light source.
[0016]
An embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a longitudinal sectional side view of a light emitting diode lighting apparatus, FIG. 2 is a side view of a light emitting diode light source partially shown in section, and FIG. 3 is a side view of a light emitting diode light source partially shown in section.
[0017]
The fixture body 2 made of sheet metal, which is one component of the light emitting diode lighting fixture 1, is formed in a cylindrical shape with an open lower surface so that it can be mounted in the opening 4 of the ceiling 3. A decorative frame 5 abutting on the periphery of the opening 4 of the ceiling 3 is detachably provided on the appliance main body 2, and a plurality of plates for fixing the appliance main body 2 to the ceiling 3 are provided on the outer peripheral surface. A spring 6 is mounted. These leaf springs 6 are inserted into the opening 4 of the ceiling 3 together with the instrument body 2 in a state of being bent inward as shown by the phantom line in FIG. Then, the inner surface of the opening 4 is pressed and the appliance body 2 is fixed to the ceiling 3 by the pressing force.
[0018]
A terminal block 7, a lighting circuit 8, and a battery 9 are incorporated in the interior of the appliance body 2. The above-described decorative frame 5 integrally includes a reflector 5a also serving as a light-shielding plate for shielding between the light emitting diode light source L and an upper space thereof, and a plurality of fins 5b disposed on the back surface of the reflector 5a. It is made of a synthetic resin or a metal material such as aluminum having excellent heat dissipation. That is, the reflection plate 5a and the decorative frame 5 having the fins 5b integrally formed on the back surface are also heat sinks that dissipate the heat generated by the light emitting diode light source L when the heat is conducted. Of course, a heat sink thermally connected to the reflection plate 5a may be separately provided. On one surface of the reflecting plate 5a, there is formed a reflecting surface 5c for reflecting light from the light emitting diode light source L toward the opening side of the instrument body 2. On the lower surface of the reflection plate 5a, there is provided a tubular heat conducting portion 10 formed of a material having good heat conductivity. Inside the heat conducting portion 10, a light emitting diode light source L is provided. Alternatively, a socket 11 which is a connection portion for selectively connecting to the battery 9 is provided in a state of being thermally connected to the heat conduction portion 10. The heat conducting part 10 may be formed integrally and continuously with the same material as the reflector 5a, or may be formed separately from a material having high thermal conductivity and thermally connected to the reflector 5a. A configuration may be used.
[0019]
Next, the configuration of the light emitting diode light source L will be described with reference to FIG. The light emitting diode light source L includes a base 13 having a screw 12 screwed to the above-described socket 11 formed on the outer periphery, a rod-shaped light emitting diode support 14 disposed on a center line of the base 13, and a base 13. One light emitting diode 15 electrically connected and supported at the center of the end face of the light emitting diode support 14 opposite to the base 13 and a diffusion region 16 for diffusing light emitted from the light emitting diode 15 are provided. And a globe 17 as an enclosure. The globe 17 is configured such that the base 13 is fixed in a sealed state by a neck portion 16c formed continuously from a boundary portion 16b of the diffusion region portion 16 opposite to the top portion 16a.
[0020]
The light-emitting diode support 14 in the present embodiment is formed of a heat conductive material such as a metal such as aluminum or copper, or an alloy containing them, and is thermally connected to the base 13 by heat conductive silicon 18. And the light emitting diode 15 are thermally connected by heat conductive silicon 19.
[0021]
Here, the light emitting diode 15 has a Lambertian light distribution curve. That is, in FIG. 2, the length of the arrow shown in the emission direction from the light emitting diode 15 indicates the light intensity. The closer the emission direction is to the center line of the base 13, the higher the light intensity becomes, The weaker the wider the angle. The outer shape of the diffusion region 16 of the globe 17 is determined to be a substantially spherical shape similar to the light distribution curve of the light emitting diode 15. The inner surface of the diffusion region 16 is subjected to a satin finish to obtain a light diffusion surface. The light emitting diode 15 is disposed at a boundary 16b formed between the neck 16c and the diffusion region 16.
[0022]
As shown in FIG. 2, the means for thermally connecting the base 13 and the light-emitting diode support 14 may be, other than the means for connecting the two via a thermally conductive material such as thermally conductive silicon 18, for example. Means for bringing the two into direct contact is included. In the latter case, as shown in FIG. 3, a screw 14a screwed to the screw 12 of the base 13 is formed on the light emitting diode support 14, thereby increasing the contact area between the base 13 and the light emitting diode support 14. It is preferable to adopt a configuration in terms of thermal conductivity.
[0023]
The glove 17 in the present embodiment has a pear-shaped shape because the neck 16 c for fixing to the base 13 has a long cylindrical portion, but the neck 16 c is fixed to the base 13. Therefore, a globe having a substantially spherical shape in which a neck portion having no cylindrical portion is continuously formed on the boundary portion 16b of the diffusion region portion 16 may be used. Also in this case, the length of the light-emitting diode support 14 is determined so that the light-emitting diode 15 is disposed near the boundary 16b formed between the neck 16c and the diffusion region 16.
[0024]
In such a configuration, the base 13 of the light emitting diode light source L is connected to the socket 11 of the light emitting diode lighting apparatus 1 and is connected to a commercial power supply via the lighting circuit 8 to emit light. Connected and emits light.
[0025]
In this case, the light emitting diode 15 has a Lambertian light distribution curve, and the outer shape of the diffusion region 16 of the globe 17 is determined to be a substantially spherical shape similar to the light distribution curve of the light emitting diode 15. The output of the light emitting diode 15 having the Lambertian light distribution curve is projected onto the globe 17 as it is because it is arranged near the boundary 16 b between the neck 16 c and the diffusion region 16. Therefore, the diffusion region 16 of the globe 17 can emit light substantially uniformly.
[0026]
Further, the light emitting diode support 14 is formed of a heat conductive material, and one end is thermally connected to the base 13 and the other end is thermally connected to the light emitting diode 15. The temperature of the light emitting diode 15 can be reduced with a simple structure in which the light is transmitted to the base 13 via the support 14. This allows the light emitting diode 15 to emit light at a constant temperature within the maximum rated value of the junction temperature. Further, the heat conducted to the base 13 can be conducted to the heat sink, which is also the reflector 5a, to dissipate the heat, and the heat can be conducted from the reflector 5a to the sheet metal device main body 2 through the decorative frame 5 to dissipate the heat. Therefore, the heat radiation effect of the heat generated in the light emitting diode 15 can be further promoted. Therefore, a current higher than the rated current can be supplied to the light emitting diode light source L to increase the amount of light for illumination.
[0027]
According to the first aspect of the present invention, the light emitting diode has a Lambertian light distribution curve, and the outer shape of the diffusion region of the envelope is similar to the light distribution curve of the light emitting diode. The light emitting diode has a substantially spherical shape, and the light emitting diode is disposed near the boundary formed between the neck portion and the diffusion region, so that the output of the light emitting diode having the light distribution curve of Lambertian is directly surrounded. Since the envelope is projected on the container, the envelope can emit substantially uniformly diffused light.
[0028]
According to the second aspect of the present invention, in the light emitting diode light source according to the first aspect, the light emitting diode support is formed of a heat conductive material, and one end is thermally connected to the base and the other end is thermally connected to the light emitting diode. , The temperature of the light emitting diode can be reduced with a simple structure that conducts the heat of the light emitting diode to the base via the light emitting diode support. This allows the light emitting diode to emit light at a constant temperature within the maximum rated value of the junction temperature, so that the output of the light emitting diode light source can be stabilized and the life can be extended.
[0029]
According to the third aspect of the present invention, there is provided a heat sink for radiating heat conducted from the light emitting diode of the light emitting diode light source according to the first or second aspect to the connection portion via the base. Can be further promoted, and therefore, a current higher than the rated current can be supplied to the light emitting diode light source to increase the amount of light for illumination.
[Brief description of the drawings]
FIG. 1 is a longitudinal sectional side view of a light emitting diode lighting fixture according to an embodiment of the present invention.
FIG. 2 is a side view of a light-emitting diode light source partially shown in section.
FIG. 3 is a side view of the light emitting diode light source, a part of which is shown in cross section.
[Explanation of symbols]
2: instrument body, 5, 5a: heat sink, 8: lighting circuit, 11: connecting part, 13: base, 14: light emitting diode support, 15: light emitting diode, 16: diffusion region, 16b: boundary, 16c: Neck part, 17: envelope, L: light emitting diode light source

Claims (3)

口金と；
前記口金に配置された発光ダイオード支持体と；
前記口金と電気的に接続され、前記発光ダイオード支持体の前記口金とは反対側に配置された発光ダイオードと；
前記口金に固定されるネック部、前記発光ダイオードから発光される光を拡散する拡散領域部、及び前記ネック部と前記拡散領域部との間に形成される境界部を有してなる透光性の外囲器と；
を具備し、
前記発光ダイオードはランバーシャンの配光曲線を有し、
前記外囲器の前記拡散領域部の外形形状は前記発光ダイオードの配光曲線に相似する略球形の形状に定められ、
前記発光ダイオードは前記境界部近傍に配置されていることを特徴とする発光ダイオード光源。With a base;
A light-emitting diode support disposed on the base;
A light emitting diode electrically connected to the base and disposed on a side of the light emitting diode support opposite to the base;
A light-transmitting material having a neck portion fixed to the base, a diffusion region portion for diffusing light emitted from the light emitting diode, and a boundary portion formed between the neck portion and the diffusion region portion. With an envelope;
With
The light emitting diode has a Lambertian light distribution curve,
The outer shape of the diffusion region portion of the envelope is determined to be a substantially spherical shape similar to a light distribution curve of the light emitting diode,
The light emitting diode light source, wherein the light emitting diode is disposed near the boundary. 前記発光ダイオード支持体は熱伝導性材料により形成され、一端が前記口金に熱的に接続され他端が前記発光ダイオードに熱的に接続されている請求項１記載の発光ダイオード光源。The light emitting diode light source according to claim 1, wherein the light emitting diode support is formed of a heat conductive material, and one end is thermally connected to the base and the other end is thermally connected to the light emitting diode. 請求項１又は２記載の発光ダイオード光源と；
電源に接続される点灯回路と；
前記発光ダイオード光源の前記口金を前記点灯回路に接続する接続部と；
前記発光ダイオード光源の前記発光ダイオードから前記口金を介して前記接続部に伝導される熱を放熱するヒートシンクと；
前記接続部に接続される前記発光ダイオード光源と前記ヒートシンクと前記点灯回路とを収容する器具本体と；
を具備する発光ダイオード照明器具。A light-emitting diode light source according to claim 1 or 2;
A lighting circuit connected to the power supply;
A connection unit for connecting the base of the light emitting diode light source to the lighting circuit;
A heat sink for radiating heat conducted from the light emitting diode of the light emitting diode light source to the connection portion via the base;
An appliance body that houses the light emitting diode light source, the heat sink, and the lighting circuit connected to the connection unit;
A light emitting diode lighting fixture comprising:
JP2002354829A 2002-12-06 2002-12-06 Light emitting diode light source and light emitting diode lighting fixture Expired - Fee Related JP4135485B2 (en)

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