JP2011159495A - Lighting system - Google Patents

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JP2011159495A
JP2011159495A JP2010020309A JP2010020309A JP2011159495A JP 2011159495 A JP2011159495 A JP 2011159495A JP 2010020309 A JP2010020309 A JP 2010020309A JP 2010020309 A JP2010020309 A JP 2010020309A JP 2011159495 A JP2011159495 A JP 2011159495A
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light emitting
emitting element
constant current
diode
led
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Seiichiro Uchio
誠一郎 内尾
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Kaga Electronics Co Ltd
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Kaga Electronics Co Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To provide an LED lighting system stably operating LEDs (light emitting diodes) regardless of the fluctuation of AC voltage. <P>SOLUTION: The LED lighting system has: a first LED group 10 constituted by connecting LEDs 10-1, 10-2, ..., 10-m, 10-n in series; a second LED group 20 constituted by connecting LEDs 20-1, 20-2, ..., 20-m, 20-n in series; a first constant current diode 12 connected to the LED 10-n of the first LED group 10; and a second constant current diode 22 connected to the LED 20-n of the second LED group 20. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

本発明は、ｐｎ接合を有する発光素子を光源に用いた照明装置に関し、特に、ＬＥＤ（light emit diode）を交流電源により直接駆動することが可能なＬＥＤ照明装置に関する。   The present invention relates to an illuminating device using a light emitting element having a pn junction as a light source, and more particularly to an LED illuminating device capable of directly driving an LED (light emit diode) with an AC power supply.

ＬＥＤは、既存の発熱電球などと比較して、消費電力が小さく、節電効果が大きいため、家庭用、オフィス用、自動車用などの照明に急速に実用化されつつある。典型的なＬＥＤ照明装置は、交流電源を利用する場合に、ＡＣ／ＤＣコンバータ、ＤＣ／ＤＣコンバータを利用するが、近年、特許文献１に示されるように、交流電源によって直接駆動することができる発光装置が提案されている。図１は、特許文献１の発光装置の等価回路図である。発光装置は、複数のＬＥＤダイオードを直列に接続した第１組のダイオード群１０と、第１組のダイオード群とは逆極性となるように並列に接続されかつ複数のＬＥＤダイオード群を直列に接続した第２組のダイオード群２０とを備えている。第１組のダイオード群１０と第２組のダイオード群２０を接続する一方のノードＮ１は、交流電源の一方の電極に接続され、第１組のダイオード群１０と第２組のダイオード群２０を接続する他方のノードＮ２は、交流電源の他方の電極に接続される。そして、第１組および第２組のダイオード群１０、２０のいずれかが交流電源によって駆動され、照明される。ＬＥＤダイオードは、ＧａＮ系の半導体層を用いて形成され、複数のＬＥＤダイオードが基板上にアレイ状に配列される。   LEDs are being put to practical use in lighting for home use, office use, automobile use, and the like because they consume less power and have a greater power saving effect than existing heat-generating light bulbs. A typical LED lighting device uses an AC / DC converter and a DC / DC converter when an AC power source is used, but in recent years, as shown in Patent Document 1, it can be directly driven by an AC power source. Light emitting devices have been proposed. FIG. 1 is an equivalent circuit diagram of the light emitting device of Patent Document 1. In FIG. The light emitting device is connected in parallel so that the first group of diodes 10 in which a plurality of LED diodes are connected in series, and the first group of diodes has a reverse polarity, and the plurality of LED diode groups are connected in series. The second set of diode groups 20 is provided. One node N1 connecting the first set of diode groups 10 and the second set of diode groups 20 is connected to one electrode of the AC power supply, and the first set of diode groups 10 and the second set of diode groups 20 are connected to each other. The other node N2 to be connected is connected to the other electrode of the AC power supply. Then, one of the first group and the second group of diode groups 10 and 20 is driven by the AC power source and illuminated. The LED diode is formed using a GaN-based semiconductor layer, and a plurality of LED diodes are arranged in an array on the substrate.

特許第４１９５０４１号Japanese Patent No. 4195041

しかしながら、特許文献１に示すＬＥＤ照明装置では、交流電圧が変動すると、駆動電流が変化し、ＬＥＤの明るさが変化してしまうという課題がある。さらに、ＬＥＤには定格電流が規定されるが、交流電圧の変化により駆動電流がＬＥＤの定格電流を超えてしまうと、ＬＥＤが破壊されてしまうおそれがある。   However, the LED lighting device disclosed in Patent Document 1 has a problem that when the AC voltage varies, the drive current changes and the brightness of the LED changes. Furthermore, although a rated current is prescribed | regulated to LED, when a drive current exceeds the rated current of LED by the change of alternating voltage, there exists a possibility that LED may be destroyed.

本発明は、このような従来の課題を解決し、交流電圧の変動にかかわらずＬＥＤを安定して動作させることができるＬＥＤ照明装置を提供することを目的とする。   An object of the present invention is to solve such a conventional problem and to provide an LED lighting device capable of stably operating an LED regardless of a change in an AC voltage.

本発明の照明装置は、交流電源によって駆動されるものであって、ｐｎ接合を有する発光素子を複数直列に接続して構成された第１組の発光素子群と、ｐｎ接合を有する発光素子を複数直列に接続して構成された第２組の発光素子群と、第１組の発光素子群に含まれる１つの発光素子と直列に接続された第１の定電流ダイオードと、第２組の発光素子群に含まれる１つの発光素子と直列に接続された第２の定電流ダイオードとを有し、第１組の発光素子群および第１の定電流ダイオードは、第２組の発光素子群および第２の定電流ダイオードに対して逆極性となるように電気的に並列に接続されている。   The lighting device of the present invention is driven by an AC power source, and includes a first set of light emitting element groups configured by connecting a plurality of light emitting elements having a pn junction in series, and a light emitting element having a pn junction. A second set of light emitting element groups connected in series, a first constant current diode connected in series with one light emitting element included in the first set of light emitting element groups, and a second set of light emitting element groups And a second constant current diode connected in series with one light emitting element included in the light emitting element group, and the first set of light emitting element groups and the first constant current diode include a second set of light emitting element groups. And it is electrically connected in parallel so as to have a reverse polarity with respect to the second constant current diode.

好ましくは第１の定電流ダイオードのアノードは、第１組の発光素子群の発光素子のカソードに接続され、第１の定電流ダイオードのカソードは、第２組の発光素子群の発光素子のアノードに接続され、第２の定電流ダイオードのアノードは、第２組の発光素子群の発光素子のカソードに接続され、第２の定電流ダイオードのカソードは、第１組の発光素子群の発光素子のアノードに接続される。好ましくは第１の定電流ダイオードのアノードは、第２組の発光素子群の発光素子のカソードに接続され、第１の定電流ダイオードのカソードは、第１組の発光素子群の発光素子のアノードに接続され、第２の定電流ダイオードのアノードは、第１組の発光素子群の発光素子のカソードに接続され、第２の定電流ダイオードのカソードは、第２組の発光素子群の発光素子のアノードに接続される。   Preferably, the anode of the first constant current diode is connected to the cathode of the light emitting element of the first set of light emitting elements, and the cathode of the first constant current diode is the anode of the light emitting element of the second set of light emitting elements. The anode of the second constant current diode is connected to the cathode of the light emitting element of the second set of light emitting element groups, and the cathode of the second constant current diode is the light emitting element of the first set of light emitting element groups Connected to the anode. Preferably, the anode of the first constant current diode is connected to the cathode of the light emitting element of the second set of light emitting elements, and the cathode of the first constant current diode is the anode of the light emitting element of the first set of light emitting elements. The anode of the second constant current diode is connected to the cathode of the light emitting element of the first set of light emitting element groups, and the cathode of the second constant current diode is the light emitting element of the second set of light emitting element groups Connected to the anode.

また、第１組の発光素子群は、Ｒ（赤色）を発光する発光素子を複数直列接続したもの、Ｇ（緑色）を発光する発光素子を複数直列接続したもの、Ｂ（青色）を発光する発光素子を複数直列接続したものを含み、第２組の発光素子群は、Ｒ（赤色）を発光する発光素子を複数直列接続したもの、Ｇ（緑色）を発光する発光素子を複数直列接続したもの、Ｂ（青色）を発光する発光素子を複数直列接続したものを含み、第１の定電流ダイオードは、Ｒ、Ｇ、Ｂの発光素子にそれぞれ直列に接続された複数の定電流ダイオードを含み、第２の定電流ダイオードは、Ｒ、Ｇ、Ｂの発光素子にそれぞれ直列に接続された複数の定電流ダイオードを含むことができる。   The first set of light emitting element groups emits R (red) light-emitting elements in series, G (green) light-emitting elements in series, and B (blue) light. The second set of light emitting elements includes a plurality of light emitting elements connected in series, a plurality of light emitting elements emitting R (red) connected in series, and a plurality of light emitting elements emitting G (green) connected in series. The first constant current diode includes a plurality of constant current diodes connected in series to the R, G, and B light emitting elements, respectively. The second constant current diode may include a plurality of constant current diodes connected in series to the R, G, and B light emitting elements, respectively.

好ましくは少なくとも第１組の発光素子群と第２組の発光素子群とをアレイ状に集積したチップと、前記チップ上に形成された電極と電気的な配線を介して電気的に接続された第１および第２の定電流ダイオードとを有する。好ましくは前記チップ、第１および第２の定電流ダイオードは、１つもパッケージ内にモジュールされている。好ましくは前記モジュールは、複数のチップと、複数のチップに対応する複数の第１および第２の定電流ダイオードを有する。   Preferably, a chip in which at least the first set of light emitting element groups and the second set of light emitting element groups are integrated in an array is electrically connected to the electrodes formed on the chip via electrical wiring. And first and second constant current diodes. Preferably, the chip and the first and second constant current diodes are all moduled in a package. Preferably, the module includes a plurality of chips and a plurality of first and second constant current diodes corresponding to the plurality of chips.

さらに本発明の照明装置は、交流電源と、交流電源を直流電源に変換するダイオードブリッジと、ダイオードブリッジからの直流電圧によって駆動される少なくとも１つのｐｎ接合を有する発光素子と、前記発光素子と前記ダイオードブリッジとの間に接続された定電流ダイオードとを有する。   Furthermore, the lighting device of the present invention includes an AC power source, a diode bridge that converts the AC power source into a DC power source, a light emitting element having at least one pn junction driven by a DC voltage from the diode bridge, the light emitting element, and the light emitting element. And a constant current diode connected between the diode bridge.

さらに本発明の照明装置は、交流電源と、交流電源を直流電源に変換するダイオードブリッジと、前記ダイオードブリッジに接続される定電流ダイオードとを有し、前記ダイオードブリッジの各々は、ｐｎ接合を有する発光素子を複数直列に接続して構成される。   The lighting device of the present invention further includes an AC power source, a diode bridge that converts the AC power source into a DC power source, and a constant current diode connected to the diode bridge, and each of the diode bridges has a pn junction. A plurality of light emitting elements are connected in series.

本発明によれば、定電流ダイオードを設けることで交流電圧が変動しても一定の駆動電流によりＬＥＤを駆動させることができる。これにより、ＬＥＤのチラツキを抑制し、また定格電流を超える異常な駆動電流からＬＥＤを保護することができる。   According to the present invention, by providing a constant current diode, the LED can be driven with a constant drive current even if the AC voltage fluctuates. Thereby, flickering of the LED can be suppressed, and the LED can be protected from an abnormal driving current exceeding the rated current.

従来のＬＥＤ照明装置の回路構成を示す図である。It is a figure which shows the circuit structure of the conventional LED lighting apparatus. 本発明の第１の実施例に係るＬＥＤ照明装置の等価回路図である。1 is an equivalent circuit diagram of an LED lighting device according to a first embodiment of the present invention. 本発明の第２の実施例に係るＬＥＤ照明装置の等価回路図である。It is an equivalent circuit schematic of the LED lighting apparatus which concerns on the 2nd Example of this invention. 第２の実施例に係るＬＥＤ照明装置の変形例である。It is a modification of the LED lighting apparatus which concerns on a 2nd Example. 本発明の第２の実施例に係るＬＥＤ照明装置の等価回路図である。It is an equivalent circuit schematic of the LED lighting apparatus which concerns on the 2nd Example of this invention. 本発明の実施例に係る照明装置の外観構成を示す図である。It is a figure which shows the external appearance structure of the illuminating device which concerns on the Example of this invention. 照明装置に搭載されるＬＥＤモジュールの平面図である。It is a top view of the LED module mounted in an illuminating device. 複数のチップを回路基板に実装したときのＬＥＤモジュールの平面図である。It is a top view of an LED module when a plurality of chips are mounted on a circuit board. 本発明の第３の実施例に係るＬＥＤ照明装置の等価回路図である。It is the equivalent circuit schematic of the LED lighting apparatus which concerns on the 3rd Example of this invention. 本発明の第４の実施例に係るＬＥＤ照明装置の等価回路図である。It is an equivalent circuit schematic of the LED lighting apparatus which concerns on the 4th Example of this invention.

本発明の最良の実施の形態について図面を参照して詳細に説明する。ここでは、典型的にＬＥＤを点灯させるためのＬＥＤ駆動装置の例を説明する。   The best mode for carrying out the present invention will be described in detail with reference to the drawings. Here, an example of an LED driving device for turning on an LED typically will be described.

図２は、本発明の実施例に係るＬＥＤ照明装置の等価回路図である。本実施例のＬＥＤ照明装置１は、ＬＥＤダイオード１０−１、１０−２、・・・、１０−ｍ、１０−ｎを直列に接続して構成された第１組のＬＥＤダイオード群１０と、ＬＥＤダイオード２０−１、２０−２、・・・、２０−ｍ、２０−ｎを直列に接続して構成された第１組のＬＥＤダイオード群２０と、第１組のＬＥＤダイオード群１０のＬＥＤダイオード１０−ｎに接続された第１の定電流ダイオード１２と、第２組のＬＥＤダイオード群２０のＬＥＤダイオード２０−ｎに接続された第２の定電流ダイオード２２とを有する。   FIG. 2 is an equivalent circuit diagram of the LED lighting device according to the embodiment of the present invention. The LED lighting device 1 of the present embodiment includes a first set of LED diode groups 10 configured by connecting LED diodes 10-1, 10-2,..., 10-m, 10-n in series, LED diodes 20-1, 20-2,..., 20-m, 20-n connected in series, a first set of LED diode groups 20 and LEDs of the first set of LED diode groups 10 The first constant current diode 12 is connected to the diode 10-n, and the second constant current diode 22 is connected to the LED diode 20-n of the second set of LED diode groups 20.

第１の定電流ダイオード１２のアノードは、ＬＥＤダイオード１０−ｎのカソードに接続され、そのカソードは、ＬＥＤダイオード２０−１のアノードおよびノードＮ２に接続されている。第２の定電流ダイオード２２のアノードは、ＬＥＤダイオード２０−ｎのカソードに接続され、そのカソードは、ＬＥＤダイオード１０−１のアノードおよびノードＮ１に接続されている。   The anode of the first constant current diode 12 is connected to the cathode of the LED diode 10-n, and the cathode is connected to the anode of the LED diode 20-1 and the node N2. The anode of the second constant current diode 22 is connected to the cathode of the LED diode 20-n, and the cathode is connected to the anode of the LED diode 10-1 and the node N1.

第１組のＬＥＤダイオード群１０および第１の定電流ダイオード１２と、第２のＬＥＤダイオード群２０および第２の定電流ダイオード２２とが逆極性となるように並列に接続され、ノードＮ１およびノードＮ２が交流電源に接続される。ＬＥＤダイオード１０−１〜１０−ｎ、ＬＥＤダイオード２０−１〜２０−ｎを直列接続することで、各ＬＥＤダイオードの駆動電圧が加算され、第１組および第２組のＬＥＤダイオード群１０、２０において高い耐圧を得ることができる。また、第１および第２の定電流ダイオード１２、２２をそれぞれ第１組および第２組ＬＥＤダイオード群１０、２０に直列に接続することで、第１および第２組のＬＥＤダイオード群に流れる駆動電流を一定にすることができる。   The first set of LED diode group 10 and the first constant current diode 12, and the second LED diode group 20 and the second constant current diode 22 are connected in parallel so as to have opposite polarities, and the node N1 and the node N2 is connected to an AC power source. By connecting the LED diodes 10-1 to 10-n and the LED diodes 20-1 to 20-n in series, the driving voltages of the LED diodes are added, and the first and second sets of LED diode groups 10, 20 are added. A high breakdown voltage can be obtained. Further, the first and second constant current diodes 12 and 22 are connected in series to the first and second set LED diode groups 10 and 20, respectively, to drive the first and second set LED diode groups. The current can be kept constant.

ＬＥＤダイオードの光出力は、駆動電流の大きさに比例するが、定電流ダイオードによって駆動電流を一定にすることで光出力を安定化させることができる。交流電圧が変動してもＬＥＤダイオードの光出力を安定させることができる。定電流ダイオードは、好ましくは、ＬＥＤダイオードの定格電流を超えない駆動電流を供給するものを選択する。または、所望される光出力に応じた駆動電流を供給する定電流ダイオードが選択される。定電流ダイオードは、例えば、石塚電子製のＣＲＤＬＥＤ安定化素子を用いることができる。また、定電流ダイオードは、ＭＯＳトランジスタを用いて構成されるもの、あるいはその他の定電流回路によって代用されてもよい。   The light output of the LED diode is proportional to the magnitude of the drive current, but the light output can be stabilized by making the drive current constant by the constant current diode. Even if the AC voltage fluctuates, the light output of the LED diode can be stabilized. The constant current diode is preferably selected to provide a drive current that does not exceed the rated current of the LED diode. Alternatively, a constant current diode that supplies a drive current according to a desired light output is selected. As the constant current diode, for example, a CRDLED stabilizing element manufactured by Ishizuka Electronics can be used. In addition, the constant current diode may be configured by using a MOS transistor or another constant current circuit.

図３Ａは、本発明の第２の実施例に係るＬＥＤ照明装置の等価回路図である。第２の実施例のＬＥＤ照明装置１Ａにおいて、第１の定電流ダイオード１２のアノードがノードＮ１およびＬＥＤダイオード２０−ｎのカソードに接続され、そのカソードがＬＥＤダイオード１０−１のアノードに接続され、第２の定電流ダイオード２２のアノードがノードＮ２およびＬＥＤダイオード１０−ｎのカソードに接続され、そのカソードがＬＥＤダイオード２０−１のアノードに接続される。   FIG. 3A is an equivalent circuit diagram of the LED lighting device according to the second embodiment of the present invention. In the LED lighting device 1A of the second embodiment, the anode of the first constant current diode 12 is connected to the node N1 and the cathode of the LED diode 20-n, and the cathode is connected to the anode of the LED diode 10-1. The anode of the second constant current diode 22 is connected to the node N2 and the cathode of the LED diode 10-n, and the cathode is connected to the anode of the LED diode 20-1.

図３Ｂは、第２の実施例のＬＥＤ照明装置の変形例である。第１組のＬＥＤダイオード群１０が直列された複数のＬＥＤダイオードを並列に接続して構成された場合、第１の低電流ダイオード１２を第１組のＬＥＤダイオード群の入力ノード（アノード側）に接続することで並列のＬＥＤダイオードに共用することができる。第２組のＬＥＤダイオード群２０についても入力ノード側に第２の定電流ダイオード２２を接続することで並列のＬＥＤダイオードに共用することができる。   FIG. 3B is a modification of the LED lighting device of the second embodiment. When the first set of LED diode groups 10 is configured by connecting a plurality of serially connected LED diodes in parallel, the first low current diode 12 is connected to the input node (anode side) of the first set of LED diode groups. By connecting, it can be shared by parallel LED diodes. The second set of LED diode groups 20 can also be shared by parallel LED diodes by connecting the second constant current diode 22 on the input node side.

ＬＥＤダイオードは、ＧａＮ系の化合物半導体を用いたもの、あるいはシリコン系のｐｎ接合を有するものを用いて構成される。第１組のＬＥＤダイオード群１０は、基板上にモノリシックに形成された２次元アレイ状の複数のＬＥＤダイオードから構成され、同様に、第２組のＬＥＤダイオード群２０は、基板上にモノリシックに形成された２次元アレイ状の複数のＬＥＤダイオードから構成される。ＬＥＤダイオードからの光は、基板の主面と垂直な方向に面光源の如く発せられる。ＬＥＤダイオードから発せらる光の波長は、特に制限されないが、ＬＥＤダイオードが青色光のように短波長の光を発する場合には、その光の波長を変換する蛍光物質などを用いて白色光を出力させるようにしてもよい。   The LED diode is configured by using a GaN compound semiconductor or a silicon pn junction. The first set of LED diode groups 10 is composed of a plurality of LED diodes in a two-dimensional array formed monolithically on the substrate. Similarly, the second set of LED diode groups 20 is formed monolithically on the substrate. A plurality of LED diodes in a two-dimensional array. Light from the LED diode is emitted like a surface light source in a direction perpendicular to the main surface of the substrate. The wavelength of the light emitted from the LED diode is not particularly limited, but when the LED diode emits a short wavelength light such as blue light, white light is emitted by using a fluorescent material that converts the wavelength of the light. You may make it output.

交流電源の電圧は、家庭用の１００Ｖ電圧、あるいはそれよりも大きい電圧であってもよいし（例えば、１１０Ｖ、２００Ｖなど）、反対に１００Ｖよりも小さい電圧であってもよい。交流電圧の大きさに応じて直列に接続されるＬＥＤダイオードの数を適宜選択することができる。   The voltage of the AC power supply may be a household voltage of 100V or a voltage higher than that (for example, 110V, 200V, etc.), and conversely a voltage lower than 100V. The number of LED diodes connected in series can be appropriately selected according to the magnitude of the AC voltage.

図４は、本発明の第３の実施例に係るＬＥＤ照明装置の等価回路図である。第３の実施例のＬＥＤ照明装置１Ｂにおいて、第１組のＬＥＤダイオード群１０は、Ｒ（赤色）を発光するＬＥＤダイオード１０Ｒ−１、１０Ｒ−２、・・・１０Ｒ−ｍ、１０Ｒ−ｎと、Ｇ（緑色）を発光するＬＥＤダイオード１０Ｇ−１、１０Ｇ−２、・・・１０Ｇ−ｍ、１０Ｇ−ｎと、青色を発光するＬＥＤダイオード１０Ｂ−１、１０Ｂ−２、・・・１０Ｂ−ｍ、１０Ｂ−ｎとを有し、ダイオード１０Ｒ−ｎ、１０Ｇ−ｎ、１０Ｂ−ｎのそれぞれに定電流ダイオード１２Ｒ、１２Ｇ、１２Ｂが接続されている。また、第２組のＬＥＤダイオード群２０は、Ｒ（赤色）を発光するＬＥＤダイオード２０Ｒ−１、２０Ｒ−２、・・・２０Ｒ−ｍ、２０Ｒ−ｎと、Ｇ（緑色）を発光するＬＥＤダイオード２０Ｇ−１、２０Ｇ−２、・・・２０Ｇ−ｍ、２０Ｇ−ｎと、青色を発光するＬＥＤダイオード２０Ｂ−１、２０Ｂ−２、・・・２０Ｂ−ｍ、２０Ｂ−ｎとを有し、ダイオード２０Ｒ−ｎ、２０Ｇ−ｎ、２０Ｂ−ｎのそれぞれに定電流ダイオード２２Ｒ、２２Ｇ、２２Ｂが接続されている。   FIG. 4 is an equivalent circuit diagram of the LED lighting device according to the third embodiment of the present invention. In the LED lighting device 1B of the third embodiment, the first set of LED diode groups 10 includes LED diodes 10R-1, 10R-2,... 10R-m, 10R-n that emit R (red). LED diodes 10G-1, 10G-2,... 10G-m, 10G-n that emit G (green), and LED diodes 10B-1, 10B-2,. 10B-n, and constant current diodes 12R, 12G, and 12B are connected to the diodes 10R-n, 10G-n, and 10B-n, respectively. The second set of LED diode groups 20 includes LED diodes 20R-1, 20R-2,... 20R-m, 20R-n that emit R (red), and LED diodes that emit G (green). 20G-1, 20G-2, ... 20G-m, 20G-n, and LED diodes 20B-1, 20B-2, ... 20B-m, 20B-n that emit blue light, and diodes Constant current diodes 22R, 22G, and 22B are connected to 20R-n, 20G-n, and 20B-n, respectively.

本実施例では、Ｒ、Ｇ、ＢのＬＥＤダイオードを用いることで白色光の照明を行うことができる。また、Ｒ、Ｇ、ＢのＬＥＤダイオードに適切な駆動電流を供給するように適宜定電流ダイオードを選択することにより、白色光の明るさを調整することができる。   In this embodiment, white light illumination can be performed by using R, G, and B LED diodes. In addition, the brightness of white light can be adjusted by appropriately selecting a constant current diode so as to supply an appropriate drive current to the R, G, and B LED diodes.

図５は、本実施例のＬＥＤ照明装置の外観形状を示している。ＬＥＤ照明装置１００は、家庭またはオフィスなどに設置された既存のソケットに接続される円筒状の電極部１１０と、電極部１１０に取り付けられた光透過性のガラスまたはプラスチックから構成される中空の封止体１２０とを有する。封止体１２０内の内部空間には、電極部１１０に電気的に接続されるモジュール化された回路基板１３０が搭載される。回路基板１３０には、本発明の第１ないし第３の実施例で示した第１組および第２組のＬＥＤダイオード群１０、２０が集積化されたチップや、第１および第２の定電流ダイオード１２、２２が実装される。   FIG. 5 shows the external shape of the LED lighting device of this embodiment. The LED lighting device 100 includes a cylindrical electrode unit 110 connected to an existing socket installed in a home or office, and a hollow seal made of light-transmitting glass or plastic attached to the electrode unit 110. And a stop 120. A modular circuit board 130 that is electrically connected to the electrode unit 110 is mounted in the internal space in the sealing body 120. The circuit board 130 includes a chip in which the first and second LED diode groups 10 and 20 shown in the first to third embodiments of the present invention are integrated, and first and second constant currents. Diodes 12 and 22 are mounted.

図６は、ＬＥＤモジュールである回路基板１３０の概略平面図である。回路基板１３０には、図示しない導電パターンが形成されている。第１組および第２組のＬＥＤダイオード群をモノリシックに集積したチップ１３２が回路基板１３０上に実装される。回路基板１３０上にはさらに、定電流ダイオード１２、２２が実装され、第１および第２の定電流ダイオード１２、２２は、電気的な接続手段１４０によってチップ１３２に電気的に接続される。また、回路基板１３０上には、交流電源に接続された電極１１０Ａ、１１０Ｂが形成され、電極１１０Ａ、１１０Ｂは、電気的な接続手段１５０によって第１および第２の定電流ダイオード１２、２２に接続される。このように１つの回路基板１３０上に、必要なチップ１３２および定電流ダイオード１２、２２を実装し、モジュール化することで、ＬＥＤ照明装置１００の組立工程は簡易になり、かつ実装部品を低減することで低コストな照明装置を提供することができる。   FIG. 6 is a schematic plan view of a circuit board 130 that is an LED module. A conductive pattern (not shown) is formed on the circuit board 130. A chip 132 in which the first set and the second set of LED diode groups are monolithically integrated is mounted on the circuit board 130. Further, the constant current diodes 12 and 22 are mounted on the circuit board 130, and the first and second constant current diodes 12 and 22 are electrically connected to the chip 132 by the electrical connection means 140. Further, electrodes 110A and 110B connected to an AC power source are formed on the circuit board 130, and the electrodes 110A and 110B are connected to the first and second constant current diodes 12 and 22 by the electrical connection means 150. Is done. As described above, by mounting the necessary chip 132 and the constant current diodes 12 and 22 on one circuit board 130 and modularizing the LED lighting device 100, the assembly process of the LED lighting device 100 is simplified and mounting components are reduced. Thus, a low-cost lighting device can be provided.

図７は、ＬＥＤモジュールである回路基板１３０上に複数のチップ１３２Ａ、１３２Ｂ、１３２Ｃ、１３２Ｄを実装した例を示している。各チップ１３２Ａ〜１３２Ｄには、第１組のＬＥＤダイオード群と第２組のダイオード群がアレイ状に集積されている。なお、定電流ダイオードは、図示を省略してある。電極１１０Ａ、１１０Ｂは、各チップ１３２Ａ〜１３２Ｄにそれぞれ配線１６０を介して電気的に接続される。交流電源の駆動によりチップ１３２Ａ〜１３２Ｄは、同時に点灯される。   FIG. 7 shows an example in which a plurality of chips 132A, 132B, 132C, and 132D are mounted on a circuit board 130 that is an LED module. In each of the chips 132A to 132D, a first set of LED diode groups and a second set of diode groups are integrated in an array. The constant current diode is not shown. The electrodes 110A and 110B are electrically connected to the chips 132A to 132D via wirings 160, respectively. The chips 132 </ b> A to 132 </ b> D are turned on simultaneously by driving the AC power supply.

次に、本発明の第３の実施例について説明する。第３の実施例は、交流電源から変換された直流電源によって駆動されるＬＥＤ照明装置に関する。図８は、第３の実施例のＬＥＤ照明装置１０Ｂの等価回路図である。同図に示すように、ＬＥＤ照明装置１０Ｂは、交流電源ＡＣと、ダイオードＤ１、Ｄ２、Ｄ３、Ｄ４からなるダイオードブリッジと、定電流ダイオード１４と、ＬＥＤダイオード１６とを含んで構成される。公知のように、交流電源ＡＣの一方の電極は、ダイオードＤ１、Ｄ３の間に接続され、他方の電極は、ダイオードＤ２、Ｄ４の間に接続され、ダイオードＤ１、Ｄ２のカソードに接続されたノードＮ１と、ダイオードＤ３、Ｄ４のアノードに接続されたノードＮ２間に直流電圧が生成される。本実施例のＬＥＤ照明装置１０Ｂでは、ノードＮ１は、定電流ダイオード１４のアノードに接続され、定電流ダイオード１４のカソードは、ＬＥＤダイオード１６のアノードに接続され、ＬＥＤダイオードのカソードは、ノードＮ２に接続される。但し、ＬＥＤダイオード１６は、少なくとも１つのダイオードを含めばよく、複数のＬＥＤダイオードを含む場合にはそれらが順方向に直列に接続される。また、定電流ダイオード１４は、ノードＮ１とＬＥＤダイオード１６の間に接続する代わりに、ノードＮ２とＬＥＤダイオード１６の間に順方向バイアスとなるように接続されるようにしてもよい。   Next, a third embodiment of the present invention will be described. The third embodiment relates to an LED lighting device driven by a DC power source converted from an AC power source. FIG. 8 is an equivalent circuit diagram of the LED lighting device 10B of the third embodiment. As shown in the figure, the LED lighting device 10B includes an AC power supply AC, a diode bridge composed of diodes D1, D2, D3, and D4, a constant current diode 14, and an LED diode 16. As is well known, one electrode of the AC power supply AC is connected between the diodes D1 and D3, the other electrode is connected between the diodes D2 and D4, and a node connected to the cathodes of the diodes D1 and D2. A DC voltage is generated between N1 and a node N2 connected to the anodes of the diodes D3 and D4. In the LED lighting device 10B of the present embodiment, the node N1 is connected to the anode of the constant current diode 14, the cathode of the constant current diode 14 is connected to the anode of the LED diode 16, and the cathode of the LED diode is connected to the node N2. Connected. However, the LED diode 16 may include at least one diode, and when a plurality of LED diodes are included, they are connected in series in the forward direction. Further, the constant current diode 14 may be connected to be forward biased between the node N2 and the LED diode 16 instead of being connected between the node N1 and the LED diode 16.

図９は、本発明の第４の実施例に係るＬＥＤ照明装置の等価回路図である。第４の実施例に係るＬＥＤ照明装置１０Ｃは、図８に示したダイオードブリッジをＬＥＤダイオードにより構成するものである。同図に示すように、交流電源ＡＣの一方の電極は、第１組のＬＥＤダイオード群３１と第３組のＬＥＤダイオード群３３との間に接続され、他方の電極は、第２組のＬＥＤダイオード群３２と第４組のＬＥＤダイオード群３４との間に接続される。第１ないし第４組のＬＥＤダイオード群３１〜３４は、複数のＬＥＤダイオードを直列に接続するものであり、高耐圧のＬＥＤダイオードブリッジを構成する。第１組および第２組のＬＥＤダイオード群３１、３２のカソードに接続されたノードＮ１と、第３組および第４組のＬＥＤダイオード群３３、３４のアノードに接続されたノードＮ２の間に定電流ダイオード３５が順方向となるように接続される。   FIG. 9 is an equivalent circuit diagram of the LED lighting device according to the fourth embodiment of the present invention. The LED lighting device 10C according to the fourth embodiment is configured such that the diode bridge shown in FIG. As shown in the figure, one electrode of the AC power supply AC is connected between the first set of LED diode groups 31 and the third set of LED diode groups 33, and the other electrode is connected to the second set of LED diodes. The diode group 32 and the fourth set of LED diode groups 34 are connected. The 1st thru | or 4th group of LED diode groups 31-34 connect a some LED diode in series, and comprise a high voltage | pressure-resistant LED diode bridge. Between the node N1 connected to the cathodes of the first and second LED diode groups 31 and 32 and the node N2 connected to the anodes of the third and fourth LED diode groups 33 and 34, The current diode 35 is connected in the forward direction.

以上、本発明の好ましい実施の形態について詳述したが、本発明は、特定の実施形態に限定されるものではなく、請求項の範囲に記載された本発明の要旨の範囲内において、種々の変形・変更が可能である。   The preferred embodiments of the present invention have been described in detail above. However, the present invention is not limited to the specific embodiments, and various modifications can be made within the scope of the gist of the present invention described in the claims. Deformation / change is possible.

１、１Ａ、１Ｂ：ＬＥＤ照明装置
１０：第１組のＬＥＤダイオード群
２０：第２組のＬＥＤダイオード群
１００：ＬＥＤ照明装置
１１０：電極部
１２０：封止体
１３０：回路基板
１４０、１５０：電気的接続手段
１６０、１６２：配線 DESCRIPTION OF SYMBOLS 1, 1A, 1B: LED lighting apparatus 10: 1st set of LED diode group 20: 2nd set of LED diode group 100: LED lighting apparatus 110: Electrode part 120: Sealing body 130: Circuit board 140, 150: Electricity Connection means 160, 162: wiring

Claims (9)

交流電源によって駆動される照明装置であって、
ｐｎ接合を有する発光素子を複数直列に接続して構成された第１組の発光素子群と、
ｐｎ接合を有する発光素子を複数直列に接続して構成された第２組の発光素子群と、
第１組の発光素子群に含まれる１つの発光素子と直列に接続された第１の定電流ダイオードと、
第２組の発光素子群に含まれる１つの発光素子と直列に接続された第２の定電流ダイオードとを有し、
第１組の発光素子群および第１の定電流ダイオードは、第２組の発光素子群および第２の定電流ダイオードに対して逆極性となるように電気的に並列に接続されている、照明装置。 A lighting device driven by an AC power source,
a first set of light emitting element groups configured by connecting a plurality of light emitting elements having a pn junction in series;
a second set of light emitting element groups configured by connecting a plurality of light emitting elements having a pn junction in series;
A first constant current diode connected in series with one light emitting element included in the first set of light emitting element groups;
A second constant current diode connected in series with one light emitting element included in the second set of light emitting element groups;
The first set of light emitting element groups and the first constant current diode are electrically connected in parallel so as to be opposite in polarity to the second set of light emitting element groups and the second constant current diode. apparatus. 第１の定電流ダイオードのアノードは、第１組の発光素子群の発光素子のカソードに接続され、第１の定電流ダイオードのカソードは、第２組の発光素子群の発光素子のアノードに接続され、第２の定電流ダイオードのアノードは、第２組の発光素子群の発光素子のカソードに接続され、第２の定電流ダイオードのカソードは、第１組の発光素子群の発光素子のアノードに接続される、請求項１に記載の照明装置。 The anode of the first constant current diode is connected to the cathode of the light emitting element of the first set of light emitting element groups, and the cathode of the first constant current diode is connected to the anode of the light emitting element of the second set of light emitting element groups. The anode of the second constant current diode is connected to the cathode of the light emitting element of the second set of light emitting elements, and the cathode of the second constant current diode is the anode of the light emitting element of the first set of light emitting elements. The lighting device according to claim 1, wherein the lighting device is connected to the lighting device. 第１の定電流ダイオードのアノードは、第２組の発光素子群の発光素子のカソードに接続され、第１の定電流ダイオードのカソードは、第１組の発光素子群の発光素子のアノードに接続され、第２の定電流ダイオードのアノードは、第１組の発光素子群の発光素子のカソードに接続され、第２の定電流ダイオードのカソードは、第２組の発光素子群の発光素子のアノードに接続される、請求項１に記載の照明装置。 The anode of the first constant current diode is connected to the cathode of the light emitting element of the second set of light emitting element groups, and the cathode of the first constant current diode is connected to the anode of the light emitting element of the first set of light emitting element groups. The anode of the second constant current diode is connected to the cathode of the light emitting element of the first set of light emitting element groups, and the cathode of the second constant current diode is the anode of the light emitting element of the second set of light emitting element groups. The lighting device according to claim 1, wherein the lighting device is connected to the lighting device. 第１組の発光素子群は、Ｒ（赤色）を発光する発光素子を複数直列接続したもの、Ｇ（緑色）を発光する発光素子を複数直列接続したもの、Ｂ（青色）を発光する発光素子を複数直列接続したものを含み、第２組の発光素子群は、Ｒ（赤色）を発光する発光素子を複数直列接続したもの、Ｇ（緑色）を発光する発光素子を複数直列接続したもの、Ｂ（青色）を発光する発光素子を複数直列接続したものを含み、第１の定電流ダイオードは、Ｒ、Ｇ、Ｂの発光素子にそれぞれ直列に接続された複数の定電流ダイオードを含み、第２の定電流ダイオードは、Ｒ、Ｇ、Ｂの発光素子にそれぞれ直列に接続された複数の定電流ダイオードを含む、請求項１ないし３いずれか１つに記載の照明装置。 The first set of light emitting element groups includes a plurality of light emitting elements emitting R (red) connected in series, a plurality of light emitting elements emitting G (green) connected in series, and a light emitting element emitting B (blue) The second set of light emitting element groups includes a plurality of light emitting elements emitting R (red) connected in series, a plurality of light emitting elements emitting G (green) connected in series, The first constant current diode includes a plurality of constant current diodes connected in series to the R, G, and B light emitting elements, respectively. The lighting apparatus according to claim 1, wherein the two constant current diodes include a plurality of constant current diodes connected in series to the R, G, and B light emitting elements. 少なくとも第１組の発光素子群と第２組の発光素子群とをアレイ状に集積したチップと、前記チップ上に形成された電極と電気的な配線を介して電気的に接続された第１および第２の定電流ダイオードとを有する、請求項１ないし４いずれか１つに記載の照明装置。 A chip in which at least a first set of light emitting element groups and a second set of light emitting element groups are integrated in an array, and a first electrode electrically connected to an electrode formed on the chip via an electrical wiring. The lighting device according to claim 1, further comprising: a second constant current diode. 前記チップ、第１および第２の定電流ダイオードは、１つもパッケージ内にモジュールされている、請求項１ないし５いずれか１つに記載の照明装置。 The lighting device according to claim 1, wherein one of the chip, the first and second constant current diodes is modularized in a package. 前記モジュールは、複数のチップと、複数のチップに対応する複数の第１および第２の定電流ダイオードを有する、請求項６に記載の照明装置。 The lighting device according to claim 6, wherein the module includes a plurality of chips and a plurality of first and second constant current diodes corresponding to the plurality of chips. 交流電源と、
交流電源を直流電源に変換するダイオードブリッジと、
ダイオードブリッジからの直流電圧によって駆動される少なくとも１つのｐｎ接合を有する発光素子と、
前記発光素子と前記ダイオードブリッジとの間に接続された定電流ダイオードと、
を有する照明装置。 AC power supply,
A diode bridge that converts AC power into DC power;
A light emitting device having at least one pn junction driven by a DC voltage from a diode bridge;
A constant current diode connected between the light emitting element and the diode bridge;
A lighting device. 交流電源と、
交流電源を直流電源に変換するダイオードブリッジと、
前記ダイオードブリッジに接続される定電流ダイオードとを有し、
前記ダイオードブリッジの各々は、ｐｎ接合を有する発光素子を複数直列に接続して構成される、照明装置。 AC power supply,
A diode bridge that converts AC power into DC power;
A constant current diode connected to the diode bridge;
Each of the diode bridges is a lighting device configured by connecting a plurality of light emitting elements having a pn junction in series.
JP2010020309A 2010-02-01 2010-02-01 Lighting system Pending JP2011159495A (en)

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JP2017174696A (en) * 2016-03-25 2017-09-28 株式会社遠藤照明 Lighting device
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US11638336B2 (en) 2004-02-25 2023-04-25 Lynk Labs, Inc. AC light emitting diode and AC LED drive methods and apparatus
US11678420B2 (en) 2004-02-25 2023-06-13 Lynk Labs, Inc. LED lighting system
US11297705B2 (en) 2007-10-06 2022-04-05 Lynk Labs, Inc. Multi-voltage and multi-brightness LED lighting devices and methods of using same
US11729884B2 (en) 2007-10-06 2023-08-15 Lynk Labs, Inc. LED circuits and assemblies
US11953167B2 (en) 2011-08-18 2024-04-09 Lynk Labs, Inc. Devices and systems having AC LED circuits and methods of driving the same
US11284491B2 (en) 2011-12-02 2022-03-22 Lynk Labs, Inc. Color temperature controlled and low THD LED lighting devices and systems and methods of driving the same
WO2014010889A1 (en) * 2012-07-09 2014-01-16 서울반도체 주식회사 Light-emitting diode lighting apparatus
US9918360B2 (en) 2012-07-09 2018-03-13 Seoul Semiconductor Co., Ltd. Light-emitting diode lighting apparatus
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JP2017174696A (en) * 2016-03-25 2017-09-28 株式会社遠藤照明 Lighting device
US11566759B2 (en) 2017-08-31 2023-01-31 Lynk Labs, Inc. LED lighting system and installation methods

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