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JP2004063237A - Lighting apparatus using light emitting diode - Google Patents

Lighting apparatus using light emitting diode Download PDF

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Publication number
JP2004063237A
JP2004063237A JP2002219272A JP2002219272A JP2004063237A JP 2004063237 A JP2004063237 A JP 2004063237A JP 2002219272 A JP2002219272 A JP 2002219272A JP 2002219272 A JP2002219272 A JP 2002219272A JP 2004063237 A JP2004063237 A JP 2004063237A
Authority
JP
Japan
Prior art keywords
light emitting
power supply
lighting
conductor pattern
circuit
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP2002219272A
Other languages
Japanese (ja)
Inventor
Ryutaro Omae
大前 龍太郎
Akihiro Naka
中 明弘
Katsuyuki Doi
土井 勝之
Motoharu Iwasaki
岩崎 元治
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Meiji National Industrial Co Ltd
Original Assignee
Meiji National Industrial Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Meiji National Industrial Co Ltd filed Critical Meiji National Industrial Co Ltd
Priority to JP2002219272A priority Critical patent/JP2004063237A/en
Publication of JP2004063237A publication Critical patent/JP2004063237A/en
Pending legal-status Critical Current

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  • Fastening Of Light Sources Or Lamp Holders (AREA)
  • Arrangement Of Elements, Cooling, Sealing, Or The Like Of Lighting Devices (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
  • Circuit Arrangement For Electric Light Sources In General (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide a lighting apparatus using a light emitting device, and to provide a lighting apparatus using a light emitting device easy to connect, adaptable to difference in numbers of connecting light emitting devices and color differences, while minimizing deterioration of luminance. <P>SOLUTION: On the surface of a printed board, a conductor pattern is formed for supplying power, and a plurality of light emitting devices 3 are arrayed and mounted. On the back surface, electronic parts of a lighting circuit 9 that lights the light emitting device 3 are mounted. The printed board having these devices is housed and fixed in a structure having a surface of light emission material, opposing to the light emitting device 3, to form a lighting apparatus. A lighting circuit 9 is formed by connecting a circuit connecting multiple of light emitting devices 3 in series in a constant current circuit having a transistor 11, a Zener diode 12 and resistors 13, 14, and connecting an impedance device 17 between the circuit and a power having 10 rectifying circuits and 15 smoothing circuits. <P>COPYRIGHT: (C)2004,JPO

Description

【0001】
【発明の属する技術分野】
本発明は、発光ダイオードを用いた照明器具に関するものである。
【0002】
【従来の技術】
例えば階段やその手摺りあるいは歩道橋の欄干などに照明器具を設置し、それらの存在位置を表示したり足元などを照明することが行われている。このような照明器具の光源としては、一般に電球や放電灯が使用されている。ところで近年昼光色に近い色の光を発光する発光ダイオードが開発され、これを電球や放電灯に代えることが試みられている。
【0003】
【発明が解決しようとする課題】
しかし、発光ダイオードを用いて照明器具を構成する場合、導体回路を形成した基板いわゆるプリント基板の一方の面(以下表面という)に多数の発光ダイオードを配列実装し、他方の面(以下裏面という)にそれらの発光ダイオードを発光させるための点灯駆動回路を構成する電子部品を実装し、これらを実装したプリント基板を、プリント基板の表面(発光ダイオードを実装している側の面)と対向する面を光透過性とした適宜の函体内に収納して構成することが考えられる。
【0004】
このように構成した発光ダイオードを用いた照明器具は、小型で取扱い易く単独での設置では便利であるが、階段やその手摺りあるいは歩道橋の欄干などに用いる場合、数多くの照明器具を必要としこれらを連結して設置することとなる。その場合、器具内または器具外にて電源線を送ることも考えられるが配線工事に難があり、電源線の短絡や地絡などの施工不良を発生しやすく、他の機器に悪影響を及ぼし易いという問題がある。また、発光ダイオードは温度が高くなると発光ダイオードを封入しているエポキシ樹脂やシリコン樹脂の光透過率が低下し、光ダイオードの輝度低下となり所望の輝度が得られなくなるという問題がある。さらに、この種の照明器具では用途に応じて発光ダイオードの接続数量違いや、色違いに対応しなければならないという問題がある。
【0005】
本発明は、第1には発光ダイオードを用いた照明器具を提供することにあり、第2には上記のような問題を解消し、連結しやすく、発光ダイオードの接続数量違いや、色違いに対応することができるとともに、輝度の低下を低減することのできる発光ダイオードを用いた照明器具を提供することを目的とする。
【0006】
【課題を解決するための手段】
請求項1に係る本発明は、表面に多数の発光ダイオードを配列実装し、裏面に前記多数の発光ダイオードの点灯回路を構成する電子部品を実装してなる基板を、多数の発光ダイオードを配列実装した前記基板の表面と対向する側の面を光透過性とした筐体に収納してなることを特徴とする。本発明では、多数の発光ダイオードを配列して照明器具を構成するので、照度が大きく、かつ小型で取扱いのしやすい照明器具を得ることができる。
【0007】
請求項2に係る本発明は、請求項1に係る本発明において、多数の発光ダイオードを配列実装した基板の表面を着色してなることを特徴とする。この特徴によって輝度の低下を補うこと(白色にして反射率を高めた場合)や演出効果を高めること(例えば赤や橙色)ができる。
【0008】
請求項3に係る本発明は、請求項1に係る本発明において、基板には、その一端から他端に伸びる電源用の導体パターンと前記導体パターンから分岐し、前記基板の電子部品に接続する電源用の導体パターンが形成されてなることを特徴とし、請求項4に係る本発明は、基板には、その一端から他端に伸びる電源用の導体パターンと前記導体パターンから分岐し、前記基板の電子部品に接続する電源用の導体パターンが形成され、前記一端から他端に伸びる電力供給用の導体パターンに連結用コネクタを接続してなることを特徴とする。これら特徴により照明器具を連結する場合の電源線の配線施工も容易になり、電源短絡や地絡の故障を低減することができる。
【0009】
請求項5に係る本発明は、請求項1に係る本発明において、基板には、その一端から他端に伸びる電源用の導体パターンと前記導体パターンから分岐し、前記基板の電子部品に接続する電源用の導体パターンが形成され、前記一端から他端に伸びる電源用の導体パターンから分岐した前記基板の電子部品に接続する電源用の導体パターンに保護ヒューズを設けてなることを特徴とする。この特徴によってその基板の回路に短絡故障が発生しても連結した照明器具の電源を確保することが可能となる。
【0010】
請求項6に係る本発明は、請求項1に記載の本発明において、点灯回路は多数の発光ダイオードを直列に接続するとともに、多数の発光ダイオードの直列回路の一端を電源の一方の端子に他端をトランジスタのコレクタに接続し、前記トランジスタのエミッタを抵抗器を介して前記電源の他方の端子に接続し、前記トランジスタのベースをツェナダイオードを介して前記電源の他方の端子に、ベースとツェナダイオードの接続点を抵抗器を介してコレクタと発光ダイオードの接続点に接続してなる回路であることを特徴とする。この特徴によって、発光ダイオードへの電力の集中を低減し、温度の上昇を抑制することができる。
【0011】
請求項7に係る本発明は、請求項6に記載の本発明において、多数の発光ダイオードの直列回路と直列にインピーダンス素子を接続してなることを特徴とする。この特徴により、灯数を減らしたり他色の発光ダイオードを採用する場合の定電流回路を構成するトランジスタへの電力集中を抑制することができる。
【0012】
【発明の実施の形態】
以下、本発明の実施の形態について図を参照して説明する。図1は本発明の一実施の形態に係る発光ダイオードを用いた照明器具の表面側を示す平面図、2は図1の発光ダイオードを用いた照明器具の連結状態を示す回路図、図3は図1の発光ダイオードを用いた照明器具の点灯回路図、図4〜図7は図1の発光ダイオードを用いた照明器具の他の例の点灯回路図である。
【0013】
図1において、1は筐体、2は導体回路を形成した基板(プリント基板)、3は発光ダイオード(以下、発光素子という。)、4はコネクタである。筐体1は縦断面コ字状をなしプリント基板の表面と対向する側の面が透明のアクリル樹脂などの光透過性の部材で形成されている。プリント基板2には、表側表面(以下、表側表面を表面といい、裏側表面を裏面という。)中央部に長手方向に沿って一列に多数の発光素子3が配列実装され、両側の端部にプリント基板2の一端から他端に伸びる電源送り用の一対の導体パターン5a、5bが形成されている(なお、この導体パターン5a、5bは基板2の裏面に形成してもよい。)。
【0014】
導体パターン5a、5bの両側の端部のそれぞれにコネクタ4が接続され、一方の端部のコネクタ4から入力した電力を他方の端部のコネクタ4に送る。プリント基板2の裏面には、表面に配列実装した多数の発光素子3を点灯する図示しない点灯回路を構成する部品が実装されている。このように多数の発光素子3および点灯回路部品などを実装したプリント基板2を筐体1に、プリント基板の表面を筐体1の光透過性の表面に対向させて挿入固定して照明器具Aを完成させる。
【0015】
商用電源あるいは直流電源に接続する照明器具Aの導体パターン5a、5bには、図2に示すように電源6に接続する側に保護ヒューズ7が挿入され、導体パターン5a、5bから分岐してその照明器具Aの点灯回路9に接続する導体パターン5cに保護ヒューズ8が挿入されている。保護ヒューズ8はこの照明器具Aにコネクタ4を介して連結される照明器具Aにも挿入されている。保護ヒューズ7と保護ヒューズ8との選定は、後段に連結される照明器具Aの導体パターン5a、5bが短絡しても、この短絡による導体パターンの銅箔が溶断するよりも先に保護ヒューズ7が溶断し、また、点灯回路の異常の場合には、保護ヒューズ8が先に溶断し、保護ヒューズ7は溶断しない選定である。
【0016】
この選定は、保護ヒューズ8の溶断よりも先に保護ヒューズ7が溶断すると、連結した照明器具のすべての発光素子が消灯する状態を避けるためである。なお、連結用の照明器具Aには、保護ヒューズ7を設けていないが、連結用の照明器具Aにも保護ヒューズ7を設けるようにしても良い、この場合、全ての照明器具に保護ヒューズ7を設ける分手間はかかるが、電源側に設ける照明器具と連結側に設ける照明器具とを区別する必要はなくなる。
【0017】
点灯回路9は、図3に示すように構成されている。すなわち図3において、6は商用交流電源、10は両波整流回路、11はnpnトランジスタ、12はツェナーダイオード、13および14は抵抗器、プリント基板の表面に配列実装された多数の発光素子3は直列に接続されている(以下、多数の発光素子3が直列に接続された回路を発光素子回路という。)。
【0018】
発光素子回路は、その一端を両波整流回路10の一方の端子に他端をトランジスタ11のコレクタに接続されている。トランジスタ11のエミッタは抵抗器13を介して両波整流回路10の他方の端子に接続され、トランジスタ11のベースはツェナダイオード12を介して両波整流回路10の他方の端子に接続されている。そしてベースとツェナダイオード12の接続点を抵抗器14を介してコレクタと発光素子回路の接続点に接続して点灯回路9を構成している。この回路によって発光素子回路には一定の電流が流れ、消費電力が抑制されるとともに発光素子回路の温度上昇を抑制する。
【0019】
なお、図3に示す点灯回路では、npnトランジスタを用いているが、図4に示すようにpnpトランジスタを用いるようにしてもよい。また、図3に示す点灯回路では、発光素子回路に電力を供給する電源は、両波整流回路10の出力による脈流であるが、図5に示すように両波整流回路10の出力側に平滑コンデンサ15を設けた電源、図6に示すように直流電源16としてもよい。
【0020】
ところで、以上の点灯回路は定電流回路で構成されている。そのために発光素子3の灯数を減らす場合、あるいは順方向電圧降下の小さい、たとえば赤色や橙色を発光する発光素子を採用した場合には、トランジスタ11に電力が集中し、トランジスタ11自体の発熱を増加し、その熱は発光素子3に温度による影響を及ぼす。これを避けるために、例えば図7に示すように、両波整流回路10の一方の端子と発光素子回路との間にインピーダンス素子17を挿入する。この挿入によりトランジスタ11への電力集中を避け、温度は分散され発光素子3への温度による影響を分散させることができる。
【0021】
なお、照明器具Aの形状やプリント基板の形状は、円形状など適宜であり、また、多数の発光素子の配列も適宜であり、発光素子の動作時の温度分布が均等になるように配列すればよい。さらに、発光素子3を配列実装したプリント基板2の表面を、たとえば白色光の発光素子を配列した場合に、白色に着色すると反射率を高め、輝度の低下を補うことができ、また、赤色光や橙色光の発光素子を配列した場合に、プリント基板2の表面の色を黒色に着色すると演出効果の高い照明器具を得ることができる。この場合、基板2の表面に着色する色と発光素子の発光色は適宜に選択すればよい。
【0022】
【発明の効果】
以上詳述したように本発明によれば、階段やその手摺りあるいは歩道橋の欄干や屋内などの照明を必要とする任意の箇所に簡単に設置することのできる照明器具が得られる。
【図面の簡単な説明】
【図1】本発明の実施の形態に係る発光ダイオードを用いた照明器具の表面側を示す平面図である。
【図2】図1の発光ダイオードを用いた照明器具の連結状態を示す回路図である。
【図3】図1の発光ダイオードを用いた照明器具の点灯回路図である。
【図4】図1の発光ダイオードを用いた照明器具の他の例を示す点灯回路図である。
【図5】図1の発光ダイオードを用いた照明器具の他の例を示す点灯回路図である。
【図6】図1の発光ダイオードを用いた照明器具の他の例を示す点灯回路図である。
【図7】図1の発光ダイオードを用いた照明器具の他の例を示す点灯回路図である。
【符号の説明】
1  筐体
2  プリント基板
3  発光ダイオード
4  コネクタ
5a、5b、5c 導体パターン
6、16  電源
7、8 保護ヒューズ
9  点灯回路
10  整流回路
11  トランジスタ
12  ツェナーダイオード
13、14  抵抗器
15  平滑コンデンサ
17  インピーダンス素子
A  照明器具
[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a lighting fixture using a light emitting diode.
[0002]
[Prior art]
For example, lighting devices are installed on stairs, handrails thereof, railings of pedestrian bridges, or the like, to display their locations, or to illuminate feet or the like. Generally, a light bulb or a discharge lamp is used as a light source of such a lighting fixture. In recent years, light-emitting diodes that emit light of a color close to daylight have been developed, and attempts have been made to replace them with electric bulbs or discharge lamps.
[0003]
[Problems to be solved by the invention]
However, when a lighting fixture is formed using light emitting diodes, a large number of light emitting diodes are arranged and mounted on one surface (hereinafter referred to as a front surface) of a printed circuit board on which a conductor circuit is formed, and the other surface (hereinafter referred to as a back surface). Electronic components that constitute a lighting drive circuit for causing the light emitting diodes to emit light are mounted on the printed circuit board, and the printed circuit board on which these components are mounted is placed on a surface facing the surface of the printed circuit board (the surface on which the light emitting diodes are mounted). May be housed in an appropriate box having a light transmitting property.
[0004]
Lighting devices using light-emitting diodes configured in this way are small and easy to handle and convenient to install by themselves, but when used on stairs, handrails or railings of pedestrian bridges, many lighting devices are required. Will be connected and installed. In that case, it is conceivable to send the power supply line inside or outside the equipment, but it is difficult to perform wiring work, it is easy to cause construction failure such as short-circuit of power supply line or ground fault, and it is easy to adversely affect other equipment There is a problem. Further, when the temperature of the light emitting diode increases, the light transmittance of the epoxy resin or the silicone resin enclosing the light emitting diode decreases, and the luminance of the photodiode decreases, so that a desired luminance cannot be obtained. Furthermore, this kind of lighting fixture has a problem that it is necessary to cope with a difference in the number of connected light emitting diodes and a difference in color depending on the application.
[0005]
The first object of the present invention is to provide a lighting fixture using a light emitting diode, and secondly, to solve the above-mentioned problems, to easily connect the light emitting diodes, to reduce the number of connected light emitting diodes, and to reduce the number of colors. It is an object of the present invention to provide a lighting device using a light-emitting diode which can cope with the problem and reduce a decrease in luminance.
[0006]
[Means for Solving the Problems]
According to the first aspect of the present invention, a substrate on which a large number of light emitting diodes are arrayed and mounted on a front surface and electronic components constituting a lighting circuit of the large number of light emitting diodes are mounted on a back surface is mounted with a large number of light emitting diodes. The surface opposite to the surface of the substrate described above is housed in a case having a light transmitting property. According to the present invention, since a lighting device is configured by arranging a large number of light emitting diodes, it is possible to obtain a lighting device having high illuminance, small size, and easy to handle.
[0007]
According to a second aspect of the present invention, in the first aspect of the present invention, the surface of the substrate on which a number of light emitting diodes are arranged and mounted is colored. With this feature, it is possible to compensate for the decrease in luminance (when the reflectance is increased by white color) and to enhance the effect (for example, red or orange).
[0008]
According to a third aspect of the present invention, in the first aspect of the present invention, the substrate is branched from the power supply conductive pattern extending from one end to the other end and the conductive pattern, and is connected to an electronic component of the substrate. The present invention according to claim 4, wherein a power supply conductor pattern is formed on the substrate, the power supply conductor pattern extending from one end to the other end of the power supply conductor pattern, and the power supply conductor pattern branches off from the conductor pattern. A power supply conductor pattern connected to the electronic component is formed, and a connection connector is connected to the power supply conductor pattern extending from the one end to the other end. With these features, wiring of the power supply line when connecting the lighting equipment is also facilitated, and power supply short-circuit and ground fault failure can be reduced.
[0009]
According to a fifth aspect of the present invention, in the first aspect of the present invention, the substrate is branched from the power supply conductive pattern extending from one end to the other end and the conductive pattern, and is connected to an electronic component of the substrate. A power supply conductor pattern is formed, and a protection fuse is provided on the power supply conductor pattern connected to the electronic component of the substrate branched from the power supply conductor pattern extending from the one end to the other end. With this feature, even if a short circuit fault occurs in the circuit of the board, it is possible to secure the power supply of the connected lighting fixture.
[0010]
According to a sixth aspect of the present invention, in the first aspect of the present invention, the lighting circuit connects a large number of light emitting diodes in series, and connects one end of the series circuit of the large number of light emitting diodes to one terminal of the power supply. One end is connected to the collector of the transistor, the emitter of the transistor is connected to the other terminal of the power supply via a resistor, the base of the transistor is connected to the other terminal of the power supply via a Zener diode, and the base and Zener are connected. The circuit is characterized in that a connection point of the diode is connected to a connection point of the collector and the light emitting diode via a resistor. With this feature, concentration of power on the light emitting diode can be reduced, and a rise in temperature can be suppressed.
[0011]
The present invention according to claim 7 is characterized in that, in the present invention according to claim 6, an impedance element is connected in series with a series circuit of a large number of light emitting diodes. With this feature, it is possible to reduce the number of lamps or suppress the concentration of power to the transistors constituting the constant current circuit when adopting a light-emitting diode of another color.
[0012]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a plan view showing a front side of a lighting fixture using the light emitting diode according to one embodiment of the present invention, 2 is a circuit diagram showing a connection state of the lighting fixture using the light emitting diode of FIG. 1, and FIG. FIG. 4 to FIG. 7 are lighting circuit diagrams of another example of the lighting fixture using the light emitting diode of FIG. 1.
[0013]
In FIG. 1, reference numeral 1 denotes a housing, 2 denotes a board (printed board) on which a conductor circuit is formed, 3 denotes a light emitting diode (hereinafter, referred to as a light emitting element), and 4 denotes a connector. The housing 1 has a U-shaped vertical cross section, and a surface facing the surface of the printed circuit board is formed of a light transmissive member such as a transparent acrylic resin. On the printed circuit board 2, a large number of light emitting elements 3 are arranged and mounted in a line along the longitudinal direction at the center of the front surface (hereinafter, the front surface is referred to as the front surface, and the back surface is referred to as the back surface). A pair of conductor patterns 5a and 5b for power supply extending from one end to the other end of the printed board 2 are formed (the conductor patterns 5a and 5b may be formed on the back surface of the board 2).
[0014]
The connectors 4 are connected to both ends of the conductor patterns 5a and 5b, respectively, and the power input from the connector 4 at one end is transmitted to the connector 4 at the other end. On the back surface of the printed circuit board 2, components constituting a lighting circuit (not shown) for lighting a large number of light emitting elements 3 arranged and mounted on the front surface are mounted. The printed circuit board 2 on which the large number of light emitting elements 3 and the lighting circuit components are mounted is inserted into and fixed to the housing 1 with the surface of the printed circuit board facing the light-transmitting surface of the housing 1. To complete.
[0015]
As shown in FIG. 2, a protective fuse 7 is inserted into the conductor patterns 5a and 5b of the lighting apparatus A connected to a commercial power supply or a DC power supply, and the protection fuse 7 is branched from the conductor patterns 5a and 5b. The protective fuse 8 is inserted in the conductor pattern 5c connected to the lighting circuit 9 of the lighting fixture A. The protection fuse 8 is also inserted into the lighting fixture A connected to the lighting fixture A via the connector 4. The selection of the protection fuse 7 and the protection fuse 8 is such that even if the conductor patterns 5a and 5b of the lighting fixture A connected at a later stage are short-circuited, the protection fuse 7 is blown before the copper foil of the conductor pattern is blown by the short-circuit. Is blown and the lighting circuit is abnormal, the protection fuse 8 is blown first and the protection fuse 7 is not blown.
[0016]
This selection is for avoiding a state where all the light emitting elements of the connected lighting fixture are turned off when the protection fuse 7 is blown before the protection fuse 8 is blown. Although the connecting fuse A is not provided with the protective fuse 7, the connecting fuse A may also be provided with the protective fuse 7. In this case, the protective fuse 7 is provided in all the lighting fixtures. However, it is not necessary to distinguish between the lighting fixture provided on the power supply side and the lighting fixture provided on the connection side.
[0017]
The lighting circuit 9 is configured as shown in FIG. That is, in FIG. 3, 6 is a commercial AC power supply, 10 is a double-wave rectifier circuit, 11 is an npn transistor, 12 is a Zener diode, 13 and 14 are resistors, and a large number of light emitting elements 3 arranged and mounted on the surface of a printed circuit board. They are connected in series (hereinafter, a circuit in which many light-emitting elements 3 are connected in series is referred to as a light-emitting element circuit).
[0018]
The light emitting element circuit has one end connected to one terminal of the dual-wave rectifier circuit 10 and the other end connected to the collector of the transistor 11. The emitter of the transistor 11 is connected via a resistor 13 to the other terminal of the dual-wave rectifier circuit 10, and the base of the transistor 11 is connected via a Zener diode 12 to the other terminal of the dual-wave rectifier circuit 10. The connection point between the base and the Zener diode 12 is connected to the connection point between the collector and the light emitting element circuit via the resistor 14 to form the lighting circuit 9. This circuit allows a constant current to flow through the light emitting element circuit, thereby suppressing power consumption and suppressing a temperature rise of the light emitting element circuit.
[0019]
Although the lighting circuit shown in FIG. 3 uses an npn transistor, a pnp transistor may be used as shown in FIG. Further, in the lighting circuit shown in FIG. 3, the power supply for supplying power to the light emitting element circuit is a pulsating flow due to the output of the dual-wave rectifier circuit 10, but as shown in FIG. A power supply provided with the smoothing capacitor 15 or a DC power supply 16 as shown in FIG. 6 may be used.
[0020]
By the way, the above lighting circuit is constituted by a constant current circuit. Therefore, when the number of lamps of the light-emitting element 3 is reduced, or when a light-emitting element that emits red or orange light with a small forward voltage drop is used, power is concentrated on the transistor 11 and heat generated by the transistor 11 itself is reduced. The heat increases, and the heat exerts an influence on the light emitting element 3 due to the temperature. To avoid this, for example, as shown in FIG. 7, an impedance element 17 is inserted between one terminal of the dual-wave rectifier circuit 10 and the light emitting element circuit. By this insertion, power concentration on the transistor 11 is avoided, the temperature is dispersed, and the influence of the temperature on the light emitting element 3 can be dispersed.
[0021]
Note that the shape of the lighting fixture A and the shape of the printed circuit board are appropriate, such as a circular shape, and the arrangement of a large number of light emitting elements is also appropriate, and the light emitting elements are arranged so that the temperature distribution during operation is uniform. Just fine. Further, when the surface of the printed circuit board 2 on which the light emitting elements 3 are arrayed and mounted, for example, white light emitting elements are arranged, if the surface is colored white, the reflectance can be increased and the decrease in luminance can be compensated. In the case where light-emitting elements that emit light or orange light are arranged, if the surface of the printed circuit board 2 is colored black, it is possible to obtain a lighting fixture with a high effect. In this case, the color for coloring the surface of the substrate 2 and the emission color of the light emitting element may be appropriately selected.
[0022]
【The invention's effect】
As described in detail above, according to the present invention, a lighting fixture that can be easily installed on any place requiring lighting, such as stairs and railings thereof, a balustrade of a pedestrian bridge, and indoors, is obtained.
[Brief description of the drawings]
FIG. 1 is a plan view showing a front side of a lighting fixture using a light emitting diode according to an embodiment of the present invention.
FIG. 2 is a circuit diagram showing a connection state of a lighting fixture using the light emitting diode of FIG. 1;
FIG. 3 is a lighting circuit diagram of a lighting fixture using the light emitting diode of FIG. 1;
FIG. 4 is a lighting circuit diagram showing another example of a lighting device using the light emitting diode of FIG. 1;
5 is a lighting circuit diagram showing another example of a lighting fixture using the light emitting diode of FIG.
FIG. 6 is a lighting circuit diagram showing another example of a lighting device using the light emitting diode of FIG. 1;
7 is a lighting circuit diagram showing another example of a lighting fixture using the light emitting diode of FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Housing 2 Printed circuit board 3 Light emitting diode 4 Connector 5a, 5b, 5c Conductor pattern 6, 16 Power supply 7, 8 Protective fuse 9 Lighting circuit 10 Rectifier circuit 11 Transistor 12 Zener diode 13, 14 Resistor 15 Smoothing capacitor 17 Impedance element A lighting equipment

Claims (7)

表面に多数の発光ダイオードを配列実装し、裏面に前記多数の発光ダイオードの点灯回路を構成する電子部品を実装してなる基板を、多数の発光ダイオードを配列実装した前記基板の表面と対向する側の面を光透過性とした筐体に収納してなることを特徴とする発光ダイオードを用いた照明器具。A substrate on which a large number of light emitting diodes are arranged and mounted on the front surface, and a substrate on which electronic components constituting a lighting circuit of the large number of light emitting diodes are mounted on the back surface, are opposed to the surface of the substrate on which the large number of light emitting diodes are arranged and mounted. A lighting device using a light emitting diode, wherein the lighting device is housed in a housing having a light transmitting surface. 多数の発光ダイオードを配列実装した基板の表面を着色してなることを特徴とする請求項1記載の発光ダイオードを用いた照明器具。The lighting device using a light emitting diode according to claim 1, wherein the surface of the substrate on which a number of light emitting diodes are arranged and mounted is colored. 基板には、その一端から他端に伸びる電源用の導体パターンと前記導体パターンから分岐し、前記基板の電子部品に接続する電源用の導体パターンが形成されてなることを特徴とする請求項1記載の発光ダイオードを用いた照明器具。2. A power supply conductor pattern extending from one end to the other end of the substrate and a power supply conductor pattern branched from the conductor pattern and connected to an electronic component of the substrate. A lighting fixture using the light-emitting diode according to the above. 基板には、その一端から他端に伸びる電源用の導体パターンと前記導体パターンから分岐し、前記基板の電子部品に接続する電源用の導体パターンが形成され、前記一端から他端に伸びる電力供給用の導体パターンに連結用コネクタを接続してなることを特徴とする請求項1記載の発光ダイオードを用いた照明器具。A power supply conductor pattern extending from one end to the other end of the substrate and a power supply conductor pattern branched from the conductor pattern and connected to an electronic component of the substrate are formed, and a power supply extending from the one end to the other end is formed. The lighting fixture using a light emitting diode according to claim 1, wherein a connecting connector is connected to the conductor pattern for use. 基板には、その一端から他端に伸びる電源用の導体パターンと前記導体パターンから分岐し、前記基板の電子部品に接続する電源用の導体パターンが形成され、前記一端から他端に伸びる電源用の導体パターンから分岐した前記基板の電子部品に接続する電源用の導体パターンに保護ヒューズを設けてなることを特徴とする請求項1記載の発光ダイオードを用いた照明器具。A power supply conductor pattern extending from one end to the other end of the substrate and a power supply conductor pattern branched from the conductor pattern and connected to an electronic component of the substrate are formed, and the power supply conductor pattern extends from the one end to the other end. The lighting fixture using a light emitting diode according to claim 1, wherein a protective fuse is provided in a power supply conductive pattern connected to an electronic component of the substrate branched from the conductive pattern of (1). 点灯回路は多数の発光ダイオードを直列に接続するとともに、多数の発光ダイオードの直列回路の一端を電源の一方の端子に他端をトランジスタのコレクタに接続し、前記トランジスタのエミッタを抵抗器を介して前記電源の他方の端子に接続し、前記トランジスタのベースをツェナダイオードを介して前記電源の他方の端子に、ベースとツェナダイオードの接続点を抵抗器を介してコレクタと発光ダイオードの接続点に接続してなる回路であることを特徴とする請求項1に記載の発光ダイオードを用いた照明器具。The lighting circuit connects a number of light emitting diodes in series, connects one end of the series circuit of the number of light emitting diodes to one terminal of a power supply and the other end to a collector of a transistor, and connects an emitter of the transistor via a resistor. Connected to the other terminal of the power supply, the base of the transistor is connected to the other terminal of the power supply via a Zener diode, and the connection point between the base and the Zener diode is connected to the connection point between the collector and the light emitting diode via a resistor The lighting device using the light emitting diode according to claim 1, wherein the lighting device is a circuit comprising: 多数の発光ダイオードの直列回路と直列にインピーダンス素子を接続してなる請求項6記載の照明器具。7. The lighting apparatus according to claim 6, wherein an impedance element is connected in series with a series circuit of a plurality of light emitting diodes.
JP2002219272A 2002-07-29 2002-07-29 Lighting apparatus using light emitting diode Pending JP2004063237A (en)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1589704A2 (en) 2004-04-23 2005-10-26 Kabushiki Kaisha Toshiba Communication apparatus, communication system and communication control program
JP2007305512A (en) * 2006-05-15 2007-11-22 Yamatake Corp Led lighting system
WO2010101062A1 (en) * 2009-03-05 2010-09-10 シャープ株式会社 Light emitting module, light emitting module unit and backlight system
JP2018101595A (en) * 2016-12-21 2018-06-28 パナソニックIpマネジメント株式会社 Light emitting device and luminaire
JP2019220265A (en) * 2018-06-15 2019-12-26 パナソニックIpマネジメント株式会社 Lighting apparatus

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1589704A2 (en) 2004-04-23 2005-10-26 Kabushiki Kaisha Toshiba Communication apparatus, communication system and communication control program
EP2117175A1 (en) 2004-04-23 2009-11-11 Kabushiki Kaisha Toshiba Communication apparatus, communication system and communication control program
JP2007305512A (en) * 2006-05-15 2007-11-22 Yamatake Corp Led lighting system
WO2010101062A1 (en) * 2009-03-05 2010-09-10 シャープ株式会社 Light emitting module, light emitting module unit and backlight system
CN102341640A (en) * 2009-03-05 2012-02-01 夏普株式会社 Light emitting module, light emitting module unit and backlight system
KR101239135B1 (en) 2009-03-05 2013-03-11 샤프 가부시키가이샤 Light emitting module, light emitting module unit and backlight system
JP5297521B2 (en) * 2009-03-05 2013-09-25 シャープ株式会社 Light emitting module, light emitting module unit and backlight system
US8714764B2 (en) 2009-03-05 2014-05-06 Sharp Kabushiki Kaisha Light emitting module, light emitting module unit, and backlight system
JP2018101595A (en) * 2016-12-21 2018-06-28 パナソニックIpマネジメント株式会社 Light emitting device and luminaire
JP2019220265A (en) * 2018-06-15 2019-12-26 パナソニックIpマネジメント株式会社 Lighting apparatus
JP7281761B2 (en) 2018-06-15 2023-05-26 パナソニックIpマネジメント株式会社 lighting equipment

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