JP2004185972A

JP2004185972A - Lighting device

Info

Publication number: JP2004185972A
Application number: JP2002351236A
Authority: JP
Inventors: Keiichi Shimizu; 恵一清水; Kazuo Egawa; 一夫江川; Masami Iwamoto; 正己岩本; Iwatomo Moriyama; 厳與森山; Akiko Nakanishi; 晶子中西; Hajime Ono; 肇大野
Original assignee: Toshiba Lighting and Technology Corp
Current assignee: Toshiba Lighting and Technology Corp
Priority date: 2002-12-03
Filing date: 2002-12-03
Publication date: 2004-07-02
Anticipated expiration: 2022-12-03
Also published as: JP4178385B2

Abstract

<P>PROBLEM TO BE SOLVED: To provide a lighting device 11 capable of improving light reflection efficiency by a reflector 14 and improving the appearance by making the entire surface of the reflector 14 bright. <P>SOLUTION: The reflector 14 is provided with a plurality of light-emitting diodes 13 arranged on the front surface side of a base plate. A plurality of reflection face parts 15 arranging each light-emitting diode 13 respectively, are placed next to each other in the reflector 14. Each reflection face part 15 spreads out towards the opposite front surface side of the base plate, and front surface sides of the adjacent reflection face parts 15 are provided continuously at a ridge line 18. Such a flat surface parts that do not contribute to the light reflection of the light-emitting diode 13 on the front surface side of the reflector 14 are not generated, therefore, the light reflection efficiency is improved by the reflector 14, the entire surface of the reflector 14 becomes brighter, and its appearance is improved. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

【０００１】
【発明の属する技術分野】
本発明は、発光ダイオードを光源とする照明装置に関する。
【０００２】
【従来の技術】
従来、発光ダイオードを光源とする照明装置では、基板の一面に複数の発光ダイオードが間隔をあけて配列されており、これら発光ダイオードの光を反射させるのに反射体が用いられている。
【０００３】
反射体には発光ダイオードがそれぞれ配置される複数の反射面部が形成され、これら反射面部は反射体の表面側に拡開開口されており、反射面部の反射面が発光ダイオードを中心とした回転対称形状に形成されていて、反射面部の開口形状が円形に形成されている（例えば、特許文献１参照）。
【０００４】
【特許文献１】
特開２００１−３３８５０５号公報（第３頁ないし第４頁、図１ないし図３）
【０００５】
【発明が解決しようとする課題】
しかしながら、反射体の表面に対して各反射面部の開口形状が円形であるため、互いに隣接する反射面部間に発光ダイオードの光の反射に寄与しない平面部分が生じ、反射体による光反射効率が低く、しかも、その平面部分の輝度が低く、暗い部分が生じることから外観を損なう問題がある。
【０００６】
本発明は、このような点に鑑みなされたもので、反射体による光反射効率を向上でき、反射体の表面全体を明るくして外観を向上できる照明装置を提供することを目的とする。
【０００７】
【課題を解決するための手段】
請求項１記載の照明装置は、基板と；基板の一面に配列された複数の発光ダイオードと；基板の一面側に配置され、基板側と反対の表面側に向けて拡開する複数の反射面部が互いに隣接して配列されているとともにこれら互いに隣接する反射面部間の表面側が稜線で連続して設けられ、各反射面部に各発光ダイオードがそれぞれ配置された反射体と；を具備しているものである。
【０００８】
そして、この構成では、反射体の表面側に向けて拡開する複数の反射面部を互いに隣接して配列するとともにこれら互いに隣接する反射面部の表面側が稜線で連続して設けたため、反射体の表面側に発光ダイオードの光の反射に寄与しない平面部分が生じず、反射体による光反射効率が向上するとともに、反射体の表面全体が明るくなって外観が向上する。
【０００９】
請求項２記載の照明装置は、請求項１記載の照明装置において、複数の発光ダイオードは、発光ダイオードのアノードとカソードとを結ぶ方向を異ならせて基板に配列され、反射体の複数の反射面部は、それぞれ配置される発光ダイオードの向きに応じた反射特性を有しているものである。
【００１０】
そして、この構成では、発光ダイオードのアノードとカソードとを結ぶ方向を異ならせて複数の発光ダイオードを基板に配列し、反射体の複数の反射面部をそれぞれ配置される発光ダイオードの向きに応じた反射特性にしているため、配光分布が均一になる。
【００１１】
請求項３記載の照明装置は、請求項１または２記載の照明装置において、反射体の外形と反射面部の表面側の開口形状とが相似関係にあるものである。
【００１２】
そして、この構成では、反射体の外形と反射面部の表面側の開口形状とが相似関係にあるため、配光パターンのイメージと実際の配光パターンとが一致し易くなる。
【００１３】
請求項４記載の照明装置は、請求項１ないし３いずれか一記載の照明装置において、発光ダイオードの光が直接出射する直接配光パターンの広がり角度と、発光ダイオードの光が反射面部で反射して出射する反射配光パターンの広がり角度とが略同一であるものである。
【００１４】
そして、この構成では、発光ダイオードの光が直接出射する直接配光パターンの広がり角度と、発光ダイオードの光が反射面部で反射して出射する反射配光パターンの広がり角度とを略同一にしたため、光の輪郭の明確な演出効果のある配光パターンが得られるとともに、遮光角を確保しながら光照射効率が向上する。
【００１５】
請求項５記載の照明装置は、請求項１ないし４いずれか一記載の照明装置において、基板と反射体とが互いに離間されてこれら基板と反射体との間に隙間が形成されているものである。
【００１６】
そして、この構成では、基板と反射体とを互いに離間させてこれら基板と反射体との間に隙間を形成したため、発光ダイオードから発生する熱の放熱性が向上し、発光ダイオードに流せる電流値が大きくすることが可能となったり、発光ダイオードの密な配列が可能になる。
【００１７】
【発明の実施の形態】
以下、本発明の一実施の形態を図面を参照して説明する。
【００１８】
図１ないし図１１に第１の実施の形態を示し、図１は照明装置の正面図、図２は照明装置の断面図、図３は照明装置の背面図、図４は照明装置の断面図、図５は照明装置を用いた照明器具の正面図、図６は照明器具の背面カバーを外した状態の背面図、図７は照明器具を吊下装置によって吊り下げた斜視図、図８は吊下装置の斜視図、図９は照明器具の配光パターンの説明図、図１０は照明器具の配光パターンの他の例の説明図、図１１は照明器具の配光パターンのさらに他の例の説明図である。
【００１９】
図１ないし図４において、１１は照明装置で、この照明装置１１は、四角形であって本実施の形態では正方形で絶縁性材料にて形成された基板１２を有し、この基板１２の一面である表面側に図示しない導電性の配線パターンが形成され、この配線パターン上にチップ状の複数の発光ダイオード１３が縦横に等間隔に並んで配列されてそれぞれ電気的かつ機械的に接続された状態に実装されている。発光ダイオード１３の発光色は、照明用として白色が用いられるが、他の単色の色や、複数色を用いてもよい。
【００２０】
基板１２の表面側には各発光ダイオード１３の光を反射させる反射体１４が配設され、この反射体１４には各発光ダイオード１３がそれぞれ配置される複数の反射面部１５が縦横に等間隔に配列されて形成されている。反射体１４は、例えば合成樹脂製で絶縁性を有し、外形が基板１２と同様に四角形であって本実施の形態では正方形に形成されている。各反射面部１５の表面を含む反射体１４の表面は反射面処理が施されている。
【００２１】
各反射面部１５は、裏面側中央に発光ダイオード１３が挿通配置される四角形または円形の挿通孔１６を有し、この挿通孔１６の縁部から反射体１４の表面側に向けて反射面１７が拡開開口され、反射体１４の表面側における開口形状は四角形であって本実施の形態では正方形に形成されている。そのため、反射面部１５の表面側の開口形状と反射体１４の外形とは相似関係にある。反射面１７は反射体１４の開口縁の各辺に連続する４面で四角形状の配光パターンが得られるように構成され、反射面１７は曲面あるいは平面であってその曲率や拡散性が発光ダイオード１３の発光特性や照明装置１１の配光パターンに対応して形成されている。したがって、互いに隣接する反射面部１５の開口縁の辺同士が線状の稜線１８で連続して形成され、この稜線１８が反射体１４の表面側において同一表面上で升目状に形成されている。
【００２２】
基板１２の裏面側の中央には、各発光ダイオード１３に電力を供給する電源部２１が取り付けられている。この電源部２１は、絶縁性を有するボックス２２を有し、このボックス２２がボックス２２から突設された複数のねじ２３によって基板１２の裏面に対して離間して間隙２４を設けた状態で取り付けられている。各ねじ２３の先端は、基板１２を貫通し、絶縁物２５を介してナット２６が螺合されて基板１２に固定されている。ボックス２２内には、発光ダイオード１３を点灯させる電子回路２７を設けた電子回路基板２８が収納され、この電子回路基板２８とねじ２３との間に絶縁物２９が介在されている。基板１２と電子回路基板２８とは間隙２４を通じて配線される電線３０により接続され、電子回路基板２８には電源側からの電線３０が間隙２４を通じて接続されている。
【００２３】
そして、この照明装置１１においては、反射体１４の表面側に向けて拡開する複数の反射面部１５を互いに隣接して配列するとともにこれら互いに隣接する反射面部１５の表面側が稜線１８で連続して設けたため、反射体１４の表面側に発光ダイオード１３の光の反射に寄与しない平面部分が生じず、反射体１４による光反射効率を向上できるとともに、反射体１４の表面全体を明るくして外観を向上できる。
【００２４】
反射体１４の外形と反射面部１５の表面側の開口形状とが相似関係にあるため、配光パターンのイメージと実際の配光パターンとを一致し易くできる。
【００２５】
基板１２と電源部２１との間に間隙２４を設けることにより、発光ダイオード１３の熱を基板１２の裏面から効率よく放熱させることができ、間隙２４を通じて電線３０，３１を配線できてこれら電線３０，３１が取扱時などに切れるのを防止できる。基板１２の裏面側中央に電源部２１を集約することにより、取扱時に電源部２１への損傷を防止できるとともに、質量バランスをよくできる。電源部２１の電子回路２７および電子回路基板２８をボックス２２内に収納するため、取扱時にそれら電子回路２７および電子回路基板２８に損傷を与えるのを防止できる。
【００２６】
また、図５および図６に示すように、複数の照明装置１１を用いることによって照明器具４１が形成されている。この照明器具４１は、四角形であって本実施の形態では正方形で薄形に形成された器具本体４２を有し、この器具本体４２の表面に複数の照明装置１１が密着状態で縦横に並んで配列され、１つの一体形の発光面４３が形成されている。この照明器具４１の外形と反射面部１５の表面側の開口形状とは相似関係にある。
【００２７】
器具本体４２の背面側には器具本体４２の補強のために井桁状に複数のリブ４４が取り付けられ、これらリブ４４間であって各照明装置１１の中央位置に対応して各照明装置１１の電源部２１が露出する複数の開口部４５が形成されている。器具本体４２の背面側にはリブ４４や開口部４５を覆って背面カバー４６（図７参照）が取り付けられている。
【００２８】
そして、この照明器具４１によれば、発光ダイオード１３を光源としているために薄形器具にでき、しかも、反射体１４の表面側に向けて拡開する複数の反射面部１５を互いに隣接して配列するとともにこれら互いに隣接する反射面部１５の表面側が稜線１８で連続して設けた照明装置１１を用いているため、反射体１４の表面側に発光ダイオード１３の光の反射に寄与しない平面部分が生じず、反射体１４による光反射効率を向上できるとともに、反射体１４の表面全体つまり発光面４３全体を明るくして外観を向上できる。
【００２９】
照明器具４１の外形と反射面部１５の表面側の開口形状とが相似関係にあるため、配光パターンのイメージと実際の配光パターンとを一致し易くできる。
【００３０】
また、照明器具４１は、天井面や壁面などに直付けしたり、スタンドに取り付けたりすることができるが、図７および図８に示すように吊下装置５１を用いて吊下形にもできる。
【００３１】
この吊下装置５１は、天井面などの設置面に設置される四角形状の吊下板５２を有し、この吊下板５２の四隅にはワイヤ支持部５３がそれぞれ形成され、対角線に位置するワイヤ支持部５３に２本の各ワイヤ５４がそれぞれ挿通自在に支持され、つまり２本のワイヤ５４が交差して支持されている。これら各ワイヤ５４の各端部は連結具５５によって器具本体４２の対角線に位置する隅部にそれぞれ連結されている。
【００３２】
吊下板５２には四角形箱状のケース５６が取り付けられ、このケース５６の四隅部に形成されるスリット５７からワイヤ５４が引き出されている。ケース５６には２本のワイヤ５４の間に介在して円柱状のスペーサ５８が回転可能に取り付けられている。スペーサ５８は、自己潤滑性があり、ワイヤ５４との表面硬度に差がある。スペーサ５８の中心とワイヤ支持部５３によるワイヤ５４の支持高さとは同一高さにあり、スペーサ５８によって２本のワイヤ５４が等分に引き離される。
【００３３】
そして、この吊下装置５１においては、照明器具４１を傾斜させるように操作することにより、各ワイヤ５４が吊下板５２のワイヤ支持部５３を摺動して吊下板５２からの各ワイヤ５４の両端の引出量の比率が変化し、照明器具４１が傾斜して照明器具４１による光照射方向を任意に調整することができる。このとき、２本のワイヤ５４が交差しているが、これらワイヤ５４間にスペーサ５８を介在させているため、ワイヤ５４同士が擦れて摩耗するのを防止でき、しかも、ワイヤ５４には照明器具４１の質量分のテンションがかかっているため、ワイヤ５４は常にスペーサ５８に押し付けられ、ワイヤ５４とスペーサ５８との間に適度な摩擦が生じ、照明器具４１の位置を保持することができる。
【００３４】
また、図９ないし図１１には、照明装置１１において、発光ダイオード１３からの直接光と反射面部１５からの反射光との関係を示す。
【００３５】
発光ダイオード１３の光が直接出射する直接配光パターンＰ１の広がり角度と、発光ダイオード１３の光が反射面部１５で反射して出射する反射配光パターンＰ２の広がり角度とは、例えば９０°で、略同一に設定されている。
【００３６】
図９は反射光が反射面部１５の前方で一旦収束した後に反射配光パターンＰ２の広がり角度で広がる例を示し、図１０は反射光が収束することなく反射配光パターンＰ２の広がり角度広がる例を示し、図１１は発光ダイオード１３の配置部分が開口している場合に反射配光パターンＰ２の広がる例を示す。
【００３７】
そして、発光ダイオード１３の光が直接出射する直接配光パターンＰ１の広がり角度と、発光ダイオード１３の光が反射面部１５で反射して出射する反射配光パターンＰ２の広がり角度とを略同一にしたため、光の輪郭の明確な演出効果のある配光パターンを得ることができるとともに、遮光角を確保しながら光照射効率を向上できる。
【００３８】
次に、図１２ないし図１５に第２の実施の形態を示す。図１２は照明装置の正面図、図１３は照明装置の断面図、図１４は照明装置の発光ダイオードの配光特性の特性図、図１５は照明装置の配光特性の特性図である。
【００３９】
発光ダイオード１３は、チップ状で、アノード１３ａとカソード１３ｂとを有し、これらアノード１３ａとカソード１３ｂとを結ぶ方向に長く、交差する方向に短く形成されている。この発光ダイオード１３は、図１４に示すように、アノード１３ａとカソード１３ｂとを結ぶ長手方向への配光分布Ａと交差する短手方向への配光分布Ｂとは異なり、発光ダイオード１３の向きで配光特性に異方性がある。このように、発光ダイオード１３の向きで配光特性に異方性があるために、照明装置１１の複数の発光ダイオード１３の向きを同一にした場合には、配光分布が不均一になる問題がある。
【００４０】
そこで、発光ダイオード１３のアノード１３ａとカソード１３ｂとを結ぶ方向を隣接する発光ダイオード１３同士で交互に異ならせて、複数の発光ダイオード１３を基板１２に配列する。さらに、反射体１４の複数の反射面部１５を、それぞれ配置される発光ダイオード１３の向きに応じた反射特性に形成する。これにより、図１５に示すように、照明装置１１の配光分布を均一にできる。
【００４１】
なお、発光ダイオード１３の向きを異ならせる配列は、隣り合う発光ダイオード１３同士で交互にすることで配光分布を最も均一にできるが、一定の間隔毎や範囲毎に異ならせても配光分布を均一にできる。
【００４２】
次に、図１６に第３の実施の形態を示し、この図１６は照明装置の断面図である。
【００４３】
基板１２と反射体１４とを互いに離間させてこれら基板１２と反射体１４との間に隙間６１を形成する。反射体１４は、反射面部１５の開口にフレネルレンズ６２を一体に形成したもので、光学系基体が構成されている。
【００４４】
そして、基板１２と反射体１４とを互いに離間させてこれら基板１２と反射体１４との間に隙間６１を形成したため、隙間６１を通じて外部との間での自然対流によって放熱でき、特に反射面部１５の開口にフレネルレンズ６２で閉塞していても、発光ダイオード１３から発生する熱の放熱性を向上でき、発光ダイオード１３に流せる電流値を大きくできたり、発光ダイオード１３の密な配列ができ、小形で光量の大きな照明装置１１を提供できる。
【００４５】
なお、照明装置１１の反射面部１５の開口形状は、正方形に限らず、長方形でも、あるいは六角形状でもよく、いずれの場合にも、反射体１４の表面側に向けて拡開する複数の反射面部１５を互いに隣接して配列できるとともにこれら互いに隣接する反射面部１５の表面側が稜線１８で連続して設けることができ、同様の作用効果が得られる。
【００４６】
【発明の効果】
請求項１記載の照明装置によれば、反射体の表面側に向けて拡開する複数の反射面部を互いに隣接して配列するとともにこれら互いに隣接する反射面部の表面側が稜線で連続して設けたため、反射体の表面側に発光ダイオードの光の反射に寄与しない平面部分が生じず、反射体による光反射効率を向上できるとともに、反射体の表面全体を明るくして外観を向上できる。
【００４７】
請求項２記載の照明装置によれば、請求項１記載の照明装置の効果に加えて、発光ダイオードのアノードとカソードとを結ぶ方向を異ならせて複数の発光ダイオードを基板に配列し、反射体の複数の反射面部をそれぞれ配置される発光ダイオードの向きに応じた反射特性にしているため、配光分布を均一にできる。
【００４８】
請求項３記載の照明装置によれば、請求項１または２記載の照明装置の効果に加えて、反射体の外形と反射面部の表面側の開口形状とが相似関係にあるため、配光パターンのイメージと実際の配光パターンとを一致し易くできる。
【００４９】
請求項４記載の照明装置によれば、請求項１ないし３いずれか一記載の照明装置の効果に加えて、発光ダイオードの光が直接出射する直接配光パターンの広がり角度と、発光ダイオードの光が反射面部で反射して出射する反射配光パターンの広がり角度とを略同一にしたため、光の輪郭の明確な演出効果のある配光パターンを得ることができるとともに、遮光角を確保しながら光照射効率を向上できる。
【００５０】
請求項５記載の照明装置によれば、請求項１ないし４いずれか一記載の照明装置の効果に加えて、基板と反射体とを互いに離間させてこれら基板と反射体との間に隙間を形成したため、発光ダイオードから発生する熱の放熱性を向上でき、発光ダイオードに流せる電流値を大きくできたり、発光ダイオードの密な配列ができる。
【図面の簡単な説明】
【図１】本発明の一実施の形態を示す照明装置の正面図である。
【図２】同上照明装置の断面図である。
【図３】同上照明装置の背面図である。
【図４】同上照明装置の断面図である。
【図５】同上照明装置を用いた照明器具の正面図である。
【図６】同上照明器具の背面カバーを外した状態の背面図である。
【図７】同上照明器具を吊下装置によって吊り下げた斜視図である。
【図８】同上吊下装置の斜視図である。
【図９】同上照明器具の配光パターンの説明図である。
【図１０】同上照明器具の配光パターンの他の例の説明図である。
【図１１】同上照明器具の配光パターンのさらに他の例の説明図である。
【図１２】本発明の第２の実施の形態を示す照明装置の正面図である。
【図１３】同上照明装置の断面図である。
【図１４】同上照明装置の発光ダイオードの配光特性の特性図である。
【図１５】同上照明装置の配光特性の特性図である。
【図１６】同上本発明の第３の実施の形態を示す照明装置の断面図である。
【符号の説明】
１１照明装置
１２基板
１３発光ダイオード
１３ａアノード
１３ｂカソード
１４反射体
１５反射面部
１８稜線
６１隙間[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a lighting device using a light emitting diode as a light source.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, in a lighting device using a light emitting diode as a light source, a plurality of light emitting diodes are arranged at intervals on one surface of a substrate, and a reflector is used to reflect light from these light emitting diodes.
[0003]
The reflector has a plurality of reflective surfaces on which light emitting diodes are respectively arranged.These reflective surfaces are opened to the front side of the reflector, and the reflective surfaces of the reflective surfaces are rotationally symmetric about the light emitting diode. The reflective surface is formed in a circular shape (see, for example, Patent Document 1).
[0004]
[Patent Document 1]
JP 2001-338505 A (pages 3 and 4, FIGS. 1 to 3)
[0005]
[Problems to be solved by the invention]
However, since the opening shape of each reflection surface portion is circular with respect to the surface of the reflector, a plane portion that does not contribute to the reflection of light of the light emitting diode is generated between the adjacent reflection surface portions, and the light reflection efficiency by the reflector is low. In addition, there is a problem that the luminance of the plane portion is low and a dark portion is generated, thereby deteriorating the appearance.
[0006]
The present invention has been made in view of such a point, and an object of the present invention is to provide a lighting device that can improve the light reflection efficiency of a reflector and can improve the appearance by brightening the entire surface of the reflector.
[0007]
[Means for Solving the Problems]
The lighting device according to claim 1, wherein: a substrate; a plurality of light-emitting diodes arranged on one surface of the substrate; and a plurality of reflection surface portions arranged on one surface of the substrate and expanding toward a surface opposite to the substrate. Are arranged adjacent to each other, and a surface side between the adjacent reflecting surface portions is continuously provided with a ridge line, and a reflector in which each light emitting diode is arranged on each reflecting surface portion is provided. It is.
[0008]
In this configuration, a plurality of reflection surface portions expanding toward the surface side of the reflector are arranged adjacent to each other, and the surface side of these adjacent reflection surface portions is continuously provided with a ridge line. There is no flat portion on the side that does not contribute to the reflection of light of the light emitting diode, and the light reflection efficiency of the reflector is improved, and the entire surface of the reflector is brightened to improve the appearance.
[0009]
The lighting device according to claim 2 is the lighting device according to claim 1, wherein the plurality of light emitting diodes are arranged on the substrate in different directions connecting the anode and the cathode of the light emitting diode, and the plurality of reflecting surface portions of the reflector are provided. Have reflection characteristics corresponding to the directions of the light emitting diodes arranged.
[0010]
In this configuration, a plurality of light emitting diodes are arranged on a substrate in different directions connecting an anode and a cathode of the light emitting diode, and a plurality of reflecting surface portions of the reflector are arranged in accordance with the directions of the light emitting diodes arranged. Due to the characteristics, the light distribution becomes uniform.
[0011]
According to a third aspect of the present invention, there is provided the lighting device according to the first or second aspect, wherein the outer shape of the reflector and the shape of the opening on the front surface side of the reflecting surface portion have a similar relationship.
[0012]
In this configuration, since the outer shape of the reflector and the shape of the opening on the surface side of the reflection surface portion are in a similar relationship, the image of the light distribution pattern and the actual light distribution pattern are easily matched.
[0013]
According to a fourth aspect of the present invention, in the lighting device according to any one of the first to third aspects, a spread angle of a direct light distribution pattern from which light of the light emitting diode is directly emitted, and light of the light emitting diode is reflected by the reflecting surface portion. And the spread angle of the reflected light distribution pattern to be emitted from the light source is substantially the same.
[0014]
In this configuration, the spread angle of the direct light distribution pattern from which the light of the light emitting diode is directly emitted is substantially equal to the spread angle of the reflected light distribution pattern from which the light of the light emitting diode is reflected by the reflecting surface and emitted. A light distribution pattern having an effect of producing a clear outline of light can be obtained, and the light irradiation efficiency can be improved while securing a light shielding angle.
[0015]
A lighting device according to a fifth aspect is the lighting device according to any one of the first to fourth aspects, wherein the substrate and the reflector are separated from each other, and a gap is formed between the substrate and the reflector. is there.
[0016]
In this configuration, since the substrate and the reflector are separated from each other to form a gap between the substrate and the reflector, the heat dissipation of the heat generated from the light emitting diode is improved, and the current value that can flow through the light emitting diode is reduced. It is possible to increase the size or to arrange the light emitting diodes densely.
[0017]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
[0018]
1 to 11 show a first embodiment. FIG. 1 is a front view of a lighting device, FIG. 2 is a cross-sectional view of the lighting device, FIG. 3 is a rear view of the lighting device, and FIG. , FIG. 5 is a front view of a lighting device using the lighting device, FIG. 6 is a rear view of the lighting device with a back cover removed, FIG. 7 is a perspective view of the lighting device suspended by a suspension device, and FIG. FIG. 9 is an explanatory view of a light distribution pattern of the lighting fixture, FIG. 10 is an explanatory view of another example of the light distribution pattern of the lighting fixture, and FIG. 11 is still another light distribution pattern of the lighting fixture. It is explanatory drawing of an example.
[0019]
1 to 4, reference numeral 11 denotes an illuminating device. The illuminating device 11 has a substrate 12 which is quadrangular, in this embodiment, square and formed of an insulating material. A conductive wiring pattern (not shown) is formed on a certain surface side, and a plurality of chip-shaped light emitting diodes 13 are arranged on the wiring pattern at equal intervals vertically and horizontally and electrically and mechanically connected to each other. Has been implemented. The light emission color of the light emitting diode 13 is white for illumination, but other single color or plural colors may be used.
[0020]
A reflector 14 for reflecting the light of each light emitting diode 13 is provided on the front surface side of the substrate 12, and a plurality of reflecting surface portions 15 on which the respective light emitting diodes 13 are respectively arranged are arranged at equal intervals in the vertical and horizontal directions. They are arranged and formed. The reflector 14 is made of, for example, a synthetic resin and has an insulating property. The reflector 14 has a square shape like the substrate 12 and is formed in a square in the present embodiment. The surface of the reflector 14 including the surface of each reflection surface portion 15 is subjected to a reflection surface treatment.
[0021]
Each reflection surface portion 15 has a rectangular or circular insertion hole 16 in which the light emitting diode 13 is inserted and arranged at the center on the back side, and a reflection surface 17 is formed from an edge of the insertion hole 16 toward the front surface side of the reflector 14. The shape of the opening on the front side of the reflector 14 is quadrangular, and is formed in a square in the present embodiment. Therefore, the opening shape on the surface side of the reflection surface portion 15 and the outer shape of the reflector 14 have a similar relationship. The reflecting surface 17 is configured so that a quadrangular light distribution pattern can be obtained with four surfaces continuous with each side of the opening edge of the reflector 14, and the reflecting surface 17 is a curved surface or a flat surface, and its curvature and diffusivity emit light. It is formed corresponding to the light emission characteristics of the diode 13 and the light distribution pattern of the lighting device 11. Therefore, the sides of the opening edge of the reflection surface portion 15 adjacent to each other are continuously formed by the linear ridge line 18, and the ridge line 18 is formed in a square shape on the same surface on the surface side of the reflector 14.
[0022]
At the center on the back side of the substrate 12, a power supply unit 21 for supplying power to each light emitting diode 13 is attached. The power supply unit 21 has a box 22 having an insulating property, and the box 22 is attached to the back surface of the substrate 12 with a gap 24 provided by a plurality of screws 23 projecting from the box 22. Have been. The tip of each screw 23 penetrates the substrate 12, and a nut 26 is screwed through an insulator 25 to be fixed to the substrate 12. An electronic circuit board 28 provided with an electronic circuit 27 for lighting the light emitting diode 13 is housed in the box 22, and an insulator 29 is interposed between the electronic circuit board 28 and the screw 23. The board 12 and the electronic circuit board 28 are connected by an electric wire 30 laid through the gap 24, and the electric wire 30 from the power supply side is connected to the electronic circuit board 28 through the gap 24.
[0023]
In the lighting device 11, a plurality of reflecting surface portions 15 expanding toward the surface side of the reflector 14 are arranged adjacent to each other, and the surface side of the reflecting surface portions 15 adjacent to each other is continuously formed by a ridge line 18. Because of the provision, a flat portion that does not contribute to the reflection of light of the light emitting diode 13 does not occur on the surface side of the reflector 14, so that the light reflection efficiency of the reflector 14 can be improved, and the entire surface of the reflector 14 is brightened to improve the appearance. Can be improved.
[0024]
Since the outer shape of the reflector 14 and the shape of the opening on the front surface side of the reflection surface portion 15 have a similar relationship, the image of the light distribution pattern can be easily matched with the actual light distribution pattern.
[0025]
By providing the gap 24 between the board 12 and the power supply unit 21, the heat of the light emitting diode 13 can be efficiently radiated from the back surface of the board 12, and the wires 30 and 31 can be routed through the gap 24. , 31 can be prevented from being broken during handling. By consolidating the power supply unit 21 at the center of the rear surface side of the substrate 12, damage to the power supply unit 21 during handling can be prevented and the mass balance can be improved. Since the electronic circuit 27 and the electronic circuit board 28 of the power supply unit 21 are housed in the box 22, damage to the electronic circuit 27 and the electronic circuit board 28 during handling can be prevented.
[0026]
Further, as shown in FIGS. 5 and 6, a lighting fixture 41 is formed by using a plurality of lighting devices 11. The lighting fixture 41 has a fixture main body 42 which is quadrangular and square and thin in the present embodiment, and a plurality of lighting devices 11 are vertically and horizontally arranged on the surface of the fixture main body 42 in close contact with each other. They are arranged to form one integral light emitting surface 43. The outer shape of the lighting fixture 41 and the opening shape on the front surface side of the reflection surface portion 15 have a similar relationship.
[0027]
A plurality of ribs 44 are attached to the back side of the fixture main body 42 in a girder shape to reinforce the fixture main body 42. A plurality of openings 45 from which the power supply unit 21 is exposed are formed. A back cover 46 (see FIG. 7) is attached to the back side of the instrument body 42 so as to cover the ribs 44 and the openings 45.
[0028]
According to the lighting device 41, since the light emitting diode 13 is used as a light source, the lighting device 41 can be formed as a thin device, and a plurality of reflecting surface portions 15 expanding toward the surface side of the reflector 14 are arranged adjacent to each other. In addition, since the illuminating device 11 in which the surface side of the reflection surface portion 15 adjacent to each other is continuously provided with the ridge line 18 is used, a flat portion which does not contribute to the reflection of light of the light emitting diode 13 is formed on the surface side of the reflector 14. Instead, the light reflection efficiency of the reflector 14 can be improved, and the entire surface of the reflector 14, that is, the entire light emitting surface 43 can be brightened to improve the appearance.
[0029]
Since the outer shape of the lighting device 41 and the opening shape on the front surface side of the reflection surface portion 15 have a similar relationship, it is easy to match the image of the light distribution pattern with the actual light distribution pattern.
[0030]
The lighting fixture 41 can be directly attached to a ceiling surface, a wall surface, or the like, or can be attached to a stand. However, as shown in FIG. 7 and FIG. .
[0031]
This suspension device 51 has a rectangular suspension plate 52 installed on an installation surface such as a ceiling surface, and wire support portions 53 are formed at four corners of the suspension plate 52, respectively, and are located diagonally. Each of the two wires 54 is supported by the wire supporting portion 53 so as to be freely inserted, that is, the two wires 54 are supported crossing each other. Each end of each of the wires 54 is connected to a diagonally located corner of the instrument body 42 by a connecting tool 55.
[0032]
A rectangular box-shaped case 56 is attached to the suspension plate 52, and the wires 54 are drawn out from slits 57 formed at four corners of the case 56. A columnar spacer 58 is rotatably attached to the case 56 between the two wires 54. The spacer 58 has a self-lubricating property, and has a difference in surface hardness from the wire 54. The center of the spacer 58 and the supporting height of the wire 54 by the wire supporting portion 53 are at the same height, and the two wires 54 are equally separated by the spacer 58.
[0033]
In this suspension device 51, by operating the lighting fixture 41 to incline, each wire 54 slides on the wire support portion 53 of the suspension plate 52, and each wire 54 from the suspension plate 52 The ratio of the amount of pullout at both ends of the lighting device 41 changes, and the lighting device 41 is inclined, so that the direction of light irradiation by the lighting device 41 can be arbitrarily adjusted. At this time, the two wires 54 intersect, but since the spacers 58 are interposed between the wires 54, the wires 54 can be prevented from rubbing against each other and being worn. Since the tension is applied by the mass of 41, the wire 54 is constantly pressed against the spacer 58, and an appropriate friction is generated between the wire 54 and the spacer 58, and the position of the lighting fixture 41 can be maintained.
[0034]
9 to 11 show the relationship between the direct light from the light emitting diode 13 and the reflected light from the reflection surface 15 in the lighting device 11.
[0035]
The spread angle of the direct light distribution pattern P1 from which the light of the light emitting diode 13 directly emits and the spread angle of the reflection light distribution pattern P2 from which the light of the light emitting diode 13 is reflected by the reflection surface portion 15 and emitted are, for example, 90 °. They are set almost identically.
[0036]
FIG. 9 shows an example in which the reflected light once converges in front of the reflecting surface portion 15 and then spreads at the spread angle of the reflected light distribution pattern P2. FIG. 10 shows an example in which the reflected light spreads without the light being converged. FIG. 11 shows an example in which the reflection light distribution pattern P2 spreads when the arrangement portion of the light emitting diode 13 is open.
[0037]
The spread angle of the direct light distribution pattern P1 from which the light of the light emitting diode 13 is directly emitted is substantially equal to the spread angle of the reflected light distribution pattern P2 from which the light of the light emitting diode 13 is reflected by the reflection surface portion 15 and emitted. In addition, it is possible to obtain a light distribution pattern having a directing effect with a clear outline of light, and to improve light irradiation efficiency while securing a light shielding angle.
[0038]
Next, FIGS. 12 to 15 show a second embodiment. 12 is a front view of the lighting device, FIG. 13 is a cross-sectional view of the lighting device, FIG. 14 is a characteristic diagram of light distribution characteristics of light emitting diodes of the lighting device, and FIG. 15 is a characteristic diagram of light distribution characteristics of the lighting device.
[0039]
The light emitting diode 13 has a chip shape and has an anode 13a and a cathode 13b. The light emitting diode 13 is formed to be long in a direction connecting the anode 13a and the cathode 13b and short in a direction crossing the anode 13a and the cathode 13b. As shown in FIG. 14, the light emitting diode 13 is different from the light distribution B in the short direction crossing the light distribution A in the longitudinal direction connecting the anode 13a and the cathode 13b, and is different from the light distribution B in the short direction. Has anisotropic light distribution characteristics. As described above, since the light distribution characteristics are anisotropic in the direction of the light emitting diode 13, when the directions of the plurality of light emitting diodes 13 of the lighting device 11 are made the same, the light distribution becomes uneven. There is.
[0040]
Therefore, the direction in which the anode 13a and the cathode 13b of the light emitting diode 13 are connected is alternately changed between the adjacent light emitting diodes 13, and the plurality of light emitting diodes 13 are arranged on the substrate 12. Further, the plurality of reflection surface portions 15 of the reflector 14 are formed to have a reflection characteristic according to the direction of the light emitting diode 13 arranged. Thereby, as shown in FIG. 15, the light distribution of the illumination device 11 can be made uniform.
[0041]
In the arrangement in which the directions of the light emitting diodes 13 are different, the light distribution can be made most uniform by alternately setting the light emitting diodes 13 adjacent to each other. Can be made uniform.
[0042]
Next, FIG. 16 shows a third embodiment, and FIG. 16 is a cross-sectional view of a lighting device.
[0043]
The gap between the substrate 12 and the reflector 14 is formed by separating the substrate 12 and the reflector 14 from each other. The reflector 14 is formed by integrally forming a Fresnel lens 62 at the opening of the reflection surface portion 15 and constitutes an optical base.
[0044]
Since the substrate 12 and the reflector 14 are separated from each other to form the gap 61 between the substrate 12 and the reflector 14, heat can be radiated through the gap 61 by natural convection between the substrate 12 and the reflector 14. Even if the opening is closed by the Fresnel lens 62, the heat radiation of the heat generated from the light emitting diode 13 can be improved, the current value that can be passed through the light emitting diode 13 can be increased, and the light emitting diode 13 can be densely arranged. Thus, it is possible to provide the illumination device 11 having a large light amount.
[0045]
The opening shape of the reflecting surface portion 15 of the illumination device 11 is not limited to a square, but may be a rectangle or a hexagon. In any case, a plurality of reflecting surface portions expanding toward the surface side of the reflector 14 are provided. 15 can be arranged adjacent to each other, and the surface sides of the reflecting surface portions 15 adjacent to each other can be provided continuously at the ridge line 18, and the same operation and effect can be obtained.
[0046]
【The invention's effect】
According to the illuminating device of the first aspect, the plurality of reflecting surface portions expanding toward the surface side of the reflector are arranged adjacent to each other, and the surface side of the adjacent reflecting surface portions is provided continuously with a ridge line. In addition, a flat portion that does not contribute to the reflection of light of the light emitting diode does not occur on the surface side of the reflector, so that the light reflection efficiency of the reflector can be improved, and the entire surface of the reflector can be brightened to improve the appearance.
[0047]
According to the lighting device of the second aspect, in addition to the effect of the lighting device of the first aspect, a plurality of light emitting diodes are arranged on a substrate in different directions connecting the anode and the cathode of the light emitting diode, and the reflector is provided. Since the plurality of reflecting surface portions have reflection characteristics corresponding to the directions of the light emitting diodes to be arranged, the light distribution can be made uniform.
[0048]
According to the lighting device of the third aspect, in addition to the effect of the lighting device of the first or second aspect, the outer shape of the reflector and the opening shape on the front surface side of the reflecting surface portion have a similar relationship, and thus the light distribution pattern And the actual light distribution pattern can be easily matched.
[0049]
According to the lighting device of the fourth aspect, in addition to the effects of the lighting device of any one of the first to third aspects, the spread angle of the direct light distribution pattern from which the light of the light emitting diode directly emits, and the light of the light emitting diode. Since the angle of spread of the reflected light distribution pattern that is reflected and emitted by the reflection surface portion is made substantially the same, a light distribution pattern having a clear directing effect of the light contour can be obtained, and light can be obtained while securing a light shielding angle. Irradiation efficiency can be improved.
[0050]
According to the illuminating device of the fifth aspect, in addition to the effect of the illuminating device of any one of the first to fourth aspects, the substrate and the reflector are separated from each other so that a gap is formed between the substrate and the reflector. Due to the formation, the heat dissipation of the heat generated from the light emitting diodes can be improved, the current value that can be passed through the light emitting diodes can be increased, and the light emitting diodes can be densely arranged.
[Brief description of the drawings]
FIG. 1 is a front view of a lighting device according to an embodiment of the present invention.
FIG. 2 is a cross-sectional view of the lighting device.
FIG. 3 is a rear view of the lighting device.
FIG. 4 is a cross-sectional view of the lighting device.
FIG. 5 is a front view of a lighting device using the lighting device.
FIG. 6 is a rear view of the lighting device with the rear cover removed.
FIG. 7 is a perspective view of the lighting fixture, which is suspended by a suspension device.
FIG. 8 is a perspective view of the hanging device.
FIG. 9 is an explanatory diagram of a light distribution pattern of the lighting fixture.
FIG. 10 is an explanatory diagram of another example of the light distribution pattern of the lighting fixture.
FIG. 11 is an explanatory diagram of still another example of the light distribution pattern of the lighting fixture.
FIG. 12 is a front view of a lighting device according to a second embodiment of the present invention.
FIG. 13 is a cross-sectional view of the lighting device.
FIG. 14 is a characteristic diagram of light distribution characteristics of the light emitting diode of the lighting device.
FIG. 15 is a characteristic diagram of light distribution characteristics of the lighting device.
FIG. 16 is a cross-sectional view of a lighting device according to the third embodiment of the present invention.
[Explanation of symbols]
Reference Signs List 11 lighting device 12 substrate 13 light emitting diode 13a anode 13b cathode 14 reflector 15 reflection surface 18 ridge 61 gap

Claims

A substrate;
A plurality of light emitting diodes arranged on one side of the substrate;
A plurality of reflective surface portions arranged on one surface side of the substrate and expanding toward the surface side opposite to the substrate side are arranged adjacent to each other, and the surface side between these mutually adjacent reflective surface portions is continuous with a ridge line. A reflector provided, wherein each light emitting diode is disposed on each reflection surface portion;
A lighting device, comprising:

The plurality of light emitting diodes are arranged on the substrate in different directions connecting the anode and the cathode of the light emitting diode,
The lighting device according to claim 1, wherein the plurality of reflection surface portions of the reflector have reflection characteristics according to the directions of the light emitting diodes arranged.

The lighting device according to claim 1, wherein the outer shape of the reflector and the shape of the opening on the front surface side of the reflection surface portion have a similar relationship.

The spread angle of the direct light distribution pattern from which the light of the light emitting diode is directly emitted is substantially the same as the spread angle of the reflected light distribution pattern from which the light of the light emitting diode is reflected by the reflecting surface and emitted. 4. The lighting device according to any one of 1 to 3.

The lighting device according to any one of claims 1 to 4, wherein the substrate and the reflector are separated from each other, and a gap is formed between the substrate and the reflector.