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JP4076329B2 - Ｌｅｄ電球 - Google Patents

Ｌｅｄ電球 Download PDF

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Publication number
JP4076329B2
JP4076329B2 JP2001245750A JP2001245750A JP4076329B2 JP 4076329 B2 JP4076329 B2 JP 4076329B2 JP 2001245750 A JP2001245750 A JP 2001245750A JP 2001245750 A JP2001245750 A JP 2001245750A JP 4076329 B2 JP4076329 B2 JP 4076329B2
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flexible circuit
circuit board
led
light
strip
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JP2003059305A (ja
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和雄 石橋
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エイテックス株式会社
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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
    • F21V3/00—Globes; Bowls; Cover glasses
    • 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
    • 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
    • F21Y2107/00—Light sources with three-dimensionally disposed 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
    • F21Y2107/00—Light sources with three-dimensionally disposed light-generating elements
    • F21Y2107/20—Light sources with three-dimensionally disposed light-generating elements on convex supports or substrates, e.g. on the outer surface of spheres
    • 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]
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L25/00—Assemblies consisting of a plurality of semiconductor or other solid state devices
    • H01L25/03—Assemblies consisting of a plurality of semiconductor or other solid state devices all the devices being of a type provided for in a single subclass of subclasses H10B, H10D, H10F, H10H, H10K or H10N, e.g. assemblies of rectifier diodes
    • H01L25/10—Assemblies consisting of a plurality of semiconductor or other solid state devices all the devices being of a type provided for in a single subclass of subclasses H10B, H10D, H10F, H10H, H10K or H10N, e.g. assemblies of rectifier diodes the devices having separate containers
    • H01L25/13—Assemblies consisting of a plurality of semiconductor or other solid state devices all the devices being of a type provided for in a single subclass of subclasses H10B, H10D, H10F, H10H, H10K or H10N, e.g. assemblies of rectifier diodes the devices having separate containers the devices being of a type provided for in group H10H20/00
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L2924/00—Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
    • H01L2924/0001—Technical content checked by a classifier
    • H01L2924/0002—Not covered by any one of groups H01L24/00, H01L24/00 and H01L2224/00
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S362/00—Illumination
    • Y10S362/80—Light emitting diode

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Optics & Photonics (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
  • Fastening Of Light Sources Or Lamp Holders (AREA)

Description

【０００１】
【発明の属する技術分野】
本発明は、複数個のＬＥＤを光源として使用する電球に関する。
【０００２】
【従来の技術】
従来、照明としてはタングステンを発熱線として使った電球やガス中で放電させ蛍光体を光らせる蛍光灯が一般的である。しかし、これらは抵抗発熱や高電圧の放電による発光を利用しているため、熱エネルギーによる損失が多く、発光効率が悪いため省エネには対応できない。また、フィラメントが断線したり電極の消耗、封入ガスの劣化などが不可避であるので製品寿命が短い。さらに、蛍光灯では有害物質を使用しているため廃棄時に環境を汚染する等の様々な問題があった。
【０００３】
一方、ＬＥＤは性能アップが急速に進み、照明には不可欠な白色ＬＥＤが開発され、また明るさにおいても照明として十分使える輝度で発光させることができるようになってきた。その結果、ＬＥＤを本格的に照明に応用しようとする研究が盛んになってきた。
【０００４】
しかしＬＥＤは光の照射角が狭いという短所があり、従来のタングステン電球のように全方向にばらつきなく光を照射することが難しい。一方向のみに集光する電球としては、図３に示すように、反射板１１をＬＥＤ１２の周囲に設けた電球１０があるが、指向性のない電球には適用できない。
【０００５】
そこで、図４に示す電球２０のように、基板２１に平面状に配列されたＬＥＤ２２の前方発光部をカバーする球状のプラスチック部２３を魚眼レンズや多面体構造にし、この部分での光の屈折を利用し全方向に光を拡散する方式が考えられた。
【０００６】
【発明が解決しようとする課題】
しかしながら、図４に示す方式では、基板２１に実装するＬＥＤの数が限られているため照度の高いものが得られず、また、ＬＥＤの位置と各レンズの位置との距離が場所によってそれぞれ異なるため、明るさのムラが発生する。このように、光の照射角が非常に狭いＬＥＤを平面基板上に複数個配置しても、光の照射角は改善されない。仮に光の反射や屈折を用いた構造をとったにしても効率が悪く非常に暗いものしかできない。
【０００７】
そこで本発明は、ＬＥＤの特徴である長寿命、省エネルギーという特性を活かしながら、その欠点であった指向性の問題を解決して、タングステン電球に近い配光特性のＬＥＤ電球を提供することを目的とするものである。
【０００８】
【課題を解決するための手段】
前記課題を解決するため、本発明のＬＥＤ電球は、展開した状態が、中心から放射状に伸びる複数の帯状枝部を有する形状であるフレキシブル回路基板であって、前記複数の帯状枝部を、前記各帯状枝部の端部に設けた結合孔で集合させて球状に曲げ可能なフレキシブル回路基板と、このフレキシブル回路基板に球状に均等配置された複数のＬＥＤと、前記球状に成形されたフレキシブル回路基板を封入する透明または半透明のカバーとからなるものとした。
前記フレキシブル回路基板は、中心から放射状に伸びる複数の帯状枝部を有する形状とすることができる。
【０００９】
本発明においては、表面にＬＥＤを複数個配置したフレキシブル回路基板を球状に曲げ、電球の光源を小さな球状とすることで、様々な方向にＬＥＤの直接光を発光させることにより、全方向への光の照射が可能になる。
電源が商用交流電源の場合は、ＬＥＤを駆動するための電源部を内部に収納する構造とすることができる。
【００１０】
【発明の実施の形態】
以下、本発明の実施の形態について、図１及び図２に基づいて説明する。
図１は本発明の実施形態を示す斜視図、図２は本発明に係るフレキシブル回路基板の実施形態の展開図である。
【００１１】
これらの図において、１は通常の電球ソケットに装着可能な口金、２はカバー、３は支持棒、４は止め金、５はフレキシブル回路基板、５ａは帯状枝部、５ｂは結合孔、６はＬＥＤチップ、７ａおよび７ｂは電極部、８は電源収納部である。
【００１２】
フレキシブル回路基板５は、図２の展開図に示すように、中心から放射状に伸びる複数の帯状枝部５ａを有する星形形状を呈しており、導電体を打ち抜きまたはエッチングで形成された配線パターンを、例えばポリイミドのようなフィルム状の曲げ可能な薄い絶縁材料膜で挟み込み保持する構成となっている。配線パターンの片側の絶縁材料膜には、半田付けをする部分の配線パターンが露出するように開口部が設けられている。フレキシブル回路基板５には複数のＬＥＤチップ６が配線パターンに半田付け等により実装されており、通常は各ＬＥＤチップ６は電極部７ａ、７ｂに対して直列接続されている。ＬＥＤチップ６のサイズは、最近の小型化技術により１．６×１．０ｍｍ程度であり、例えば３ｍｍ幅の帯状枝部５ａに十分搭載できる寸法である。
【００１３】
この星形のフレキシブル回路基板５の各帯状枝部５ａの先端部を結合孔５ｂで集合して支持棒３に通し、止め金４で止めれば、フレキシブル回路基板５は図１に示すように球状の形状になる。
【００１４】
各ＬＥＤチップ６への通電は、口金１から供給される電源が１００Ｖの商用交流電源の場合には、電源収納部８に内蔵された電源回路（図示せず）で低電圧の直流に変換し、支持棒３を通してフレキシブル回路基板５の電極部７ａ、７ｂに電流を供給することによって行う。
【００１５】
カバー２は透明または半透明なプラスチックで構成することができる。透明にした場合は、複数のＬＥＤチップのそれぞれが点光源として見えるが、半透明ないし乳白色にすると、乱反射の作用により、カバー２の全面が発光しているように見える。このカバー２の内部は白熱電球のように真空にする必要はないが、内部にゴミや湿気が入らないように乾燥した空気か不活性の窒素ガスなどを封入することが好ましい。
【００１６】
電源収納部８は内部の回路が見えないように、着色したプラスチックを用い、回路から発生する熱を放散するために熱伝導性のよいシリコンゴム等で回路をモールドしておくとよい。
【００１７】
このような構成のＬＥＤ電球において、通常の電球と同様にソケットに口金１を装着すると、電源収納部８に内蔵された電源回路から支持棒３を通ってフレキシブル回路基板５の電極部７ａ、７ｂに直流電流が供給され、各ＬＥＤチップ６が点灯する。各ＬＥＤチップ６は球状のフレキシブル回路基板５の表面にほぼ均等に配置されているため、球光源となって、カバー２から全方向に光が照射される。
【００１８】
ＬＥＤチップ６は用途に応じて各種の色のものを使用することができる。通常の白熱電球の代用には白色ＬＥＤを用いるが、赤、緑、青、橙などのＬＥＤを単独または組み合わせて使用することもできる。また、カバー２に着色したものを用いて、ＬＥＤの色とカバーの色の組み合わせで別の色を発光するようにすることもできる。
【００２０】
以上の実施形態では、口金１から供給される電源として１００Ｖの商用交流電源の場合について説明したが、１２Ｖ程度の直流電源のソケットに口金１を装着する使用方法の場合は、電球内に収納する電源回路が不要であり、したがって図１の電源収納部８は設ける必要がない。
さらに、口金１を設けずに、リード線を引き出して外部の電源を接続するようにしてもよい。
【００２１】
【発明の効果】
上述したように、本発明によれば次の効果を奏する。
【００２２】
（１）展開した状態が平面状で球状に曲げ可能なフレキシブル回路基板と、このフレキシブル回路基板に球状に均等配置された複数のＬＥＤと、前記球状に成形されたフレキシブル回路基板を封入する透明または半透明のカバーとからなる構成とすることにより、光源が球状に配置された状態となり、したがって、様々な方向にＬＥＤの直接光を発光させることにより、全方向への光の照射が可能になる。
【００２３】
（２）フレキシブル回路基板を、中心から放射状に伸びる複数の帯状枝部を有する形状とすることにより、製造時は平板から成形でき、曲げることによって球状にすることができる。
【００２４】
（３）商用交流電源を使用する場合には、ＬＥＤを点灯するための電源部を内部に収納することにより、通常の白熱電球と同様に使用することができる。
【図面の簡単な説明】
【図１】 本発明の実施形態を示す斜視図である。
【図２】 本発明に係るフレキシブル回路基板の実施形態の展開図である。
【図３】 従来の反射板付きのＬＥＤ電球の一部断面図である。
【図４】 従来のレンズ構造のＬＥＤ電球の一部断面図である。
【符号の説明】
１ 口金
２ カバー
３ 支持棒
４ 止め金
５ フレキシブル回路基板
５ａ 帯状枝部
５ｂ 結合孔
６ ＬＥＤチップ
７ａ，７ｂ 電極部
８ 電源収納部

Claims (2)

  1. 展開した状態が、中心から放射状に伸びる複数の帯状枝部を有する形状であるフレキシブル回路基板であって、前記複数の帯状枝部を、前記各帯状枝部の端部に設けた結合孔で集合させて球状に曲げ可能なフレキシブル回路基板と、
    このフレキシブル回路基板に球状に均等配置された複数のＬＥＤと、
    前記球状に成形されたフレキシブル回路基板を封入する透明または半透明のカバーと
    からなるＬＥＤ電球。
  2. 前記フレキシブル回路基板の各ＬＥＤに対して電流を供給可能な電源部を収納した電源収納部を前記カバーの基部に設けた請求項１記載のＬＥＤ電球。
JP2001245750A 2001-08-13 2001-08-13 Ｌｅｄ電球 Expired - Fee Related JP4076329B2 (ja)

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JP2001245750A JP4076329B2 (ja) 2001-08-13 2001-08-13 Ｌｅｄ電球
US10/147,119 US6709132B2 (en) 2001-08-13 2002-05-16 LED bulb

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Application Number Priority Date Filing Date Title
JP2001245750A JP4076329B2 (ja) 2001-08-13 2001-08-13 Ｌｅｄ電球

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JP4076329B2 true JP4076329B2 (ja) 2008-04-16

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US11592166B2 (en) 2020-05-12 2023-02-28 Feit Electric Company, Inc. Light emitting device having improved illumination and manufacturing flexibility
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US7728345B2 (en) * 2001-08-24 2010-06-01 Cao Group, Inc. Semiconductor light source for illuminating a physical space including a 3-dimensional lead frame
US8569785B2 (en) * 2001-08-24 2013-10-29 Cao Group, Inc. Semiconductor light source for illuminating a physical space including a 3-dimensional lead frame
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US7034470B2 (en) * 2002-08-07 2006-04-25 Eastman Kodak Company Serially connecting OLED devices for area illumination
US10340424B2 (en) 2002-08-30 2019-07-02 GE Lighting Solutions, LLC Light emitting diode component
US8083376B2 (en) * 2002-11-04 2011-12-27 Tseng-Lu Chien LED power failure light
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JP5566564B2 (ja) 2003-05-05 2014-08-06 ジーイー ライティング ソリューションズ エルエルシー Ｌｅｄ利用型電球
US7407304B2 (en) * 2003-11-06 2008-08-05 Antonio Tasson Illumination device with arms that open after passing through a hole
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US8967838B1 (en) * 2004-03-13 2015-03-03 David Christopher Miller Flexible LED substrate capable of being formed into a concave LED light source, concave light sources so formed and methods of so forming concave LED light sources
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US7215086B2 (en) * 2004-04-23 2007-05-08 Lighting Science Group Corporation Electronic light generating element light bulb
US7367692B2 (en) * 2004-04-30 2008-05-06 Lighting Science Group Corporation Light bulb having surfaces for reflecting light produced by electronic light generating sources
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