JP2017103193A - Illumination device using led, and drive circuit for illumination device using led - Google Patents
Illumination device using led, and drive circuit for illumination device using led Download PDFInfo
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Description
本発明はＬＥＤを用いた照明装置及びＬＥＤを用いた照明装置の駆動回路に関するものである。 The present invention relates to an illumination device using an LED and a drive circuit for the illumination device using an LED.
発光ダイオード（ＬＥＤ素子、以下単にＬＥＤとも称する）を使用した照明装置は、蛍光灯や白熱電球といった従来の照明器具に比べ、長寿命かつ低消費電力であるという特徴を有しており、環境への配慮に優れた次世代の照明機器として期待されている。 Lighting devices using light emitting diodes (LED elements, hereinafter also simply referred to as LEDs) have characteristics of longer life and lower power consumption than conventional lighting fixtures such as fluorescent lamps and incandescent bulbs. It is expected to be a next-generation lighting device that excels in consideration.
交流電源を半波整流した場合は交流交番波形の一方の極性（例えばプラス側）の半波のみの間歇的な脈動波形となる。一方、全波整流した場合、一方の極性（例えばプラス側）に他方の極性（マイナス側）半波が折り返した連続する脈流波形となる。 When the AC power supply is half-wave rectified, only a half-wave of one polarity (for example, plus side) of the AC alternating waveform becomes an intermittent pulsation waveform. On the other hand, when full-wave rectification is performed, a continuous pulsating flow waveform is obtained in which one polarity (for example, the positive side) and the other polarity (the negative side) half-wave are folded back.
ＬＥＤには点灯のための所定の電圧（点灯電圧）及び所定の電流（点灯電流）があり、これらの条件を満たす電流・電圧を印加する必要がある。したがって、脈流波形を平滑して所定の電圧にする交流直流変換が必要である。 The LED has a predetermined voltage for lighting (lighting voltage) and a predetermined current (lighting current), and it is necessary to apply a current / voltage satisfying these conditions. Therefore, it is necessary to perform AC / DC conversion to smooth the pulsating current waveform to a predetermined voltage.
一般のＬＥＤ照明装置に於いては上記の脈動波形を直流に出来るだけ近づけかつ、商用電源の休止期間においても常時点灯できるように、電力の蓄積をするコンデンサを備えるＬＥＤ駆動回路を用い、その一定した直流電圧によりＬＥＤの明滅が無く常時発光する波形にてＬＥＤ素子を駆動することが主流である。しかし、この直流化回路に於いては良好な安定性と、途切れのない発光を実現するために寿命の短い化学的な反応を利用した大容量のコンデンサを必要とするためコストアップと信頼性の低下に繋がることが問題となっていた。 In a general LED lighting device, the above pulsation waveform is made as close as possible to a direct current, and an LED driving circuit having a capacitor for accumulating electric power is used so that the pulsation waveform can be always lit even during a commercial power supply idle period. It is the mainstream to drive the LED element with a waveform that always emits light without blinking of the LED by the direct current voltage. However, this DC circuit requires a large capacity capacitor using a chemical reaction with a short life in order to realize good stability and uninterrupted light emission. The problem was that it led to a decline.
直流駆動方式は、交流を平滑直流電圧に一旦変換し、ＬＥＤを所定レベルの直流にて駆動させるものである。交流電源を直流化するために用いる交直変換回路、所謂インバータ回路でのスイッチング動作をするような電源回路は素子数も多く、回路が複雑になり、コスト高となっている。また、この場合の整流回路には電解コンデンサなどの大容量のコンデンサや変圧器（トランス）を必要とする。このような電気部品は、ＬＥＤと比べて寿命が短く、長寿命の照明手段であることを特徴とするＬＥＤとの組み合わせは好ましくない。 The direct current drive method is a method in which alternating current is once converted into a smooth direct current voltage, and the LED is driven by a predetermined level of direct current. An AC / DC converter circuit used for converting an AC power source into a DC power source, that is, a power source circuit that performs a switching operation in a so-called inverter circuit, has a large number of elements, a complicated circuit, and a high cost. In this case, the rectifier circuit requires a large-capacity capacitor such as an electrolytic capacitor and a transformer. Such an electrical component has a shorter life than an LED and is not preferable in combination with an LED, which is a long-life lighting means.
ＬＥＤの駆動に関する従来技術を開示したものとして、例えば、特許文献１では、ＬＥＤの発光駆動に際して定電流駆動回路で生じる消費電力を抑制・低減し、定電流駆動回路の安定・正常な動作を実現すべく、ＬＥＤアレイと、ＬＥＤドライバＩＣと、ＤＣーＤＣコンバータと、分圧抵抗からなる第１のフィードバック回路と、コントローラおよび第２のフィードバック回路とを有するヘッドルーム電圧監視回路とを備え、第２のフィードバック回路は、ＬＥＤドライバＩＣの電流端子にそれぞれ得られるヘッドルーム電圧をＤＣーＤＣコンバータにフィードバックする形態が提案されている。 For example, in Japanese Patent Application Laid-Open No. 2004-260260, the power consumption generated in the constant current driving circuit during LED light emission driving is suppressed and reduced, and stable and normal operation of the constant current driving circuit is realized. And a headroom voltage monitoring circuit having a LED array, an LED driver IC, a DC-DC converter, a first feedback circuit composed of a voltage dividing resistor, a controller and a second feedback circuit, As for the feedback circuit 2, a form has been proposed in which the headroom voltage obtained at the current terminal of the LED driver IC is fed back to the DC-DC converter.
立体的な構造で、直流安定性能を上げることができ、高性能化することにより回路定数を縮小できるため部品点数の削減が結果的に可能であり低コストで製造可能で、信頼性が高いこととともに、フリッカや暗時間の問題を解決した安定した発光が得られ、低消費電力化と長寿命化を実現するＬＥＤ駆動回路及びＬＥＤ照明装置が求められている。 The three-dimensional structure can improve the direct current stability, and the circuit constant can be reduced by improving the performance. As a result, the number of parts can be reduced, and it can be manufactured at low cost, and the reliability is high. At the same time, there is a need for an LED driving circuit and an LED lighting device that can achieve stable light emission that solves the problems of flicker and dark time, and realizes low power consumption and long life.
本発明は、これらの課題を解決し、簡便な構成で安定した発光が得られ、部品点数の削減が可能であり低コストで製造可能であり且つ長期信頼性が向上するとともに、低消費電力を実現するＬＥＤを用いた照明装置及びＬＥＤを用いた照明装置の駆動回路を提供せんとするものである。 The present invention solves these problems, obtains stable light emission with a simple configuration, can reduce the number of components, can be manufactured at low cost, improves long-term reliability, and reduces power consumption. It is an object of the present invention to provide a lighting device using an LED and a driving circuit for the lighting device using the LED.
本発明は、同時に部品点数を減少させることにより基板サイズを小型化でき、照明装置全体ををコンパクトにすることが出来るとともに、高性能化することより簡素な部品が使用でき製品原価を下げコストダウンに寄与するＬＥＤを用いた照明装置及びＬＥＤを用いた照明装置の駆動回路を提供せんとするものである。 By reducing the number of parts at the same time, the present invention can reduce the board size and make the entire lighting device compact, and by improving the performance, simple parts can be used, reducing the product cost and reducing the cost. It is intended to provide a lighting device using an LED that contributes to the above and a driving circuit for the lighting device using the LED.
さらに本発明は、立体的な構成であり冗長的な構造によるメリットを享受でき、耐障害許容性が発揮されるため長期にわたる連続使用中に一部の回路が停止しても機能運転を継続することが出来、長期間に亘って信頼性の向上に寄与するＬＥＤを用いた照明装置及びＬＥＤを用いた照明装置の駆動回路を提供せんとするものである。 Furthermore, the present invention has a three-dimensional configuration and can enjoy the advantages of a redundant structure, and since fault tolerance is exhibited, functional operation continues even if some circuits stop during long-term continuous use. Therefore, it is an object of the present invention to provide an illumination device using an LED that contributes to improving reliability over a long period of time and a drive circuit for the illumination device using an LED.
本発明は、 複数のＬＥＤ発光素子と、これを駆動するＬＥＤ駆動回路を備え、 該ＬＥＤ駆動回路はＬＥＤ発光素子に供給する駆動電流を効率的に安定化させ、且つ使用するコンデンサ容量を抑えて信頼性とコストを両立するものであり、 該ＬＥＤ駆動回路は複数の安定回路が並列に接続される構成を含み、 該並列接続された部分を含む複数の安定回路からの出力を一定電流制御回路を介してＬＥＤ発光素子に供給することにより、リップルが除かれて安定した発光が得られ、且つ使用するコンデンサ容量を抑えて信頼性とコストを両立することができることを特徴とする、ＬＥＤを用いた照明装置及びＬＥＤを用いた照明装置の駆動回路である。 The present invention includes a plurality of LED light-emitting elements and an LED drive circuit that drives the LED light-emitting elements. The LED drive circuit efficiently stabilizes the drive current supplied to the LED light-emitting elements and suppresses the capacitor capacity to be used. The LED driving circuit includes a configuration in which a plurality of stable circuits are connected in parallel, and outputs from the plurality of stable circuits including the parallel-connected portions are constant current control circuits. By using the LED, it is possible to obtain stable light emission with ripples removed by supplying to the LED light-emitting element via the capacitor, and to reduce the capacitor capacity to be used and to achieve both reliability and cost. It is the drive circuit of the illuminating device and the illuminating device which used LED.
また本発明は、 該ＬＥＤ駆動回路が、複数の安定回路がマトリクス状に配置接続されて構成されることを特徴とする、ＬＥＤを用いた照明装置及びＬＥＤを用いた照明装置の駆動回路である。さらに、該ＬＥＤ駆動回路に含まれる複数の安定回路によるマトリクスは、行列を構成する複数の安定回路が少なくとも複数行及び／又は複数列を含むものであることを特徴とする。 Further, the present invention is an illumination device using an LED and an illumination device drive circuit using an LED, wherein the LED drive circuit is configured by connecting and connecting a plurality of stable circuits in a matrix. . Further, the matrix of the plurality of stable circuits included in the LED driving circuit is characterized in that the plurality of stable circuits constituting the matrix includes at least a plurality of rows and / or a plurality of columns.
また本発明は、該ＬＥＤ駆動回路に含まれる複数の安定回路が、複数の安定回路が少なくとも並列に接続される構成を含み、さらに並列接続された単位及び／又は直列接続された単位が混在する構成を含むものであることを特徴とする、ＬＥＤを用いた照明装置及びＬＥＤを用いた照明装置の駆動回路である。
Further, the present invention includes a configuration in which the plurality of stable circuits included in the LED driving circuit includes a plurality of stable circuits connected in parallel, and further, units connected in parallel and / or units connected in series are mixed. An illumination device using an LED and a drive circuit for the illumination device using an LED, including a configuration.
さらに本発明は、該ＬＥＤ駆動回路に用いられる安定回路が、スイッチングレギュレータであることを特徴とする。さらに、該ＬＥＤ駆動回路に用いられる安定回路はスイッチングレギュレータであって、その制御方式は電圧モード、電流モード或いはヒステリシス制御の何れかであることを特徴とする。或いは、該ＬＥＤ駆動回路に用いられる安定回路はスイッチングレギュレータであって、その動作方式はパルス周波数変調方式或いはパルス幅変調方式の何れかであることを特徴とする。或いは、該ＬＥＤ駆動回路に用いられる安定回路はスイッチングレギュレータであって、該スイッチングレギュレータはチョッパ型安定器を含むことを特徴とする。
Furthermore, the invention is characterized in that the stabilization circuit used in the LED drive circuit is a switching regulator. Further, the stabilization circuit used in the LED driving circuit is a switching regulator, and the control method is any one of a voltage mode, a current mode, and a hysteresis control. Alternatively, the stabilization circuit used in the LED driving circuit is a switching regulator, and its operation method is either a pulse frequency modulation method or a pulse width modulation method. Alternatively, the ballast circuit used in the LED driving circuit is a switching regulator, and the switching regulator includes a chopper type ballast.
また本発明は、該ＬＥＤ駆動回路に用いられる安定回路が、リニアレギュレータであることを特徴とする、ＬＥＤを用いた照明装置及びＬＥＤを用いた照明装置の駆動回路である。 Further, the present invention is a lighting device using an LED and a driving circuit for the lighting device using an LED, wherein the stabilization circuit used in the LED driving circuit is a linear regulator.
また本発明は、該ＬＥＤ駆動回路に用いられる一定電流制御回路が、電流検知抵抗の両端の電圧降下が一定になるように負荷抵抗によってスイッチの動作抵抗を変えることにより一定電流を出力する、スイッチング型一定電流制御回路であることを特徴とする、ＬＥＤを用いた照明装置及びＬＥＤを用いた照明装置の駆動回路である。 Further, the present invention provides a constant current control circuit used in the LED driving circuit that outputs a constant current by changing an operating resistance of a switch by a load resistance so that a voltage drop across the current detection resistor is constant. An illumination device using an LED and a drive circuit for the illumination device using an LED, characterized by being a constant current control circuit.
また本発明は、該ＬＥＤ駆動回路に用いられる一定電流制御回路が、電流検知抵抗の両端の電圧降下が一定になるようにフィードバック回路によって可変抵抗の動作抵抗を変えることにより一定電流を出力する、リニア型一定電流制御回路であることを特徴とする、ＬＥＤを用いた照明装置及びＬＥＤを用いた照明装置の駆動回路である。 In the present invention, the constant current control circuit used in the LED driving circuit outputs a constant current by changing the operating resistance of the variable resistor by a feedback circuit so that the voltage drop across the current detection resistor is constant. An illumination device using an LED and a drive circuit for the illumination device using an LED, which are a linear constant current control circuit.
また本発明は、該ＬＥＤ駆動回路に用いられる一定電流制御回路における抵抗値の制御が、トランジスタにより行われることを特徴とする、ＬＥＤを用いた照明装置及びＬＥＤを用いた照明装置の駆動回路である。さらに、該ＬＥＤ駆動回路に用いられる一定電流制御回路に用いられるトランジスタは、ＦＥＴトランジスタ、バイポーラトランジスタ或いはＩＧＢＴの何れかであることを特徴とする。 The present invention also provides a lighting device using an LED and a driving circuit for the lighting device using an LED, wherein the resistance value in the constant current control circuit used in the LED driving circuit is controlled by a transistor. is there. Further, the transistor used in the constant current control circuit used in the LED drive circuit is any one of an FET transistor, a bipolar transistor, or an IGBT.
また本発明は、該ＬＥＤ駆動回路の複数の安定回路が、安定回路が並列に配置接続された部分及び安定回路が直列に配置接続された部分を含んで構成されることを特徴とする、ＬＥＤを用いた照明装置及びＬＥＤを用いた照明装置の駆動回路である。 Further, the present invention is characterized in that the plurality of ballast circuits of the LED driving circuit includes a portion where the ballast circuits are arranged and connected in parallel and a portion where the ballast circuits are arranged and connected in series. It is the drive circuit of the illuminating device using LED, and the illuminating device using LED.
本発明に係るＬＥＤを用いた照明装置及びＬＥＤを用いた照明装置の駆動回路は、ＬＥＤ発光素子に供給する駆動電流を効率的に安定化させ、且つ使用するコンデンサ容量を抑えて信頼性とコストを両立するのもであって、 並列接続された部分を含む複数の安定回路からの出力を一定電流制御回路を介してＬＥＤ発光素子に供給することにより、リップルが除かれて安定した発光が得られ、且つ使用するコンデンサ容量を抑えて信頼性とコストを両立することができるＬＥＤを用いた照明装置及びＬＥＤを用いた照明装置の駆動回路を提供するものである。 The illumination device using the LED and the drive circuit of the illumination device using the LED according to the present invention efficiently stabilize the drive current supplied to the LED light-emitting element, and suppress the capacitor capacity to be used, thereby reducing the reliability and cost. By supplying the output from a plurality of stable circuits including parts connected in parallel to the LED light-emitting element via a constant current control circuit, ripples are eliminated and stable light emission is obtained. In addition, the present invention provides an illumination device using an LED and a drive circuit for the illumination device using an LED, which can reduce the capacitor capacity used and achieve both reliability and cost.
以下、本発明に係るＬＥＤを用いた照明装置及びＬＥＤを用いた照明装置の駆動回路を、図面を用いて説明する。 Hereinafter, a lighting device using an LED and a driving circuit of the lighting device using the LED according to the present invention will be described with reference to the drawings.
図１は、本発明に係るＬＥＤを用いた照明装置及びこれに用いる駆動回路の機能を説明するための概念図である。本発明は、 ＬＥＤを用いた照明装置及びこれに用いる駆動回路に関するものであり、複数のＬＥＤ発光素子と、これを駆動するＬＥＤ駆動回路を備え、 該ＬＥＤ駆動回路はＬＥＤ発光素子に供給する駆動電流を効率的に安定化させ、且つ使用するコンデンサ容量を抑えて信頼性とコストを両立するものであり、 該ＬＥＤ駆動回路は複数の安定回路が並列に接続される構成を含み、 該並列接続された部分を含む複数の安定回路からの出力を一定電流制御回路を介してＬＥＤ発光素子に供給することにより、リップルが除かれて安定した発光が得られ、且つ使用するコンデンサ容量を抑えて信頼性とコストを両立することができることを特徴とする。
FIG. 1 is a conceptual diagram for explaining functions of an illumination device using an LED according to the present invention and a drive circuit used therefor. The present invention relates to an illumination device using an LED and a drive circuit used for the illumination device, and includes a plurality of LED light emitting elements and an LED drive circuit for driving the LED light emitting elements, and the LED drive circuit supplies the LED light emitting elements. The LED drive circuit includes a configuration in which a plurality of stable circuits are connected in parallel, the current being efficiently stabilized, and a capacitor capacity to be used is suppressed to achieve both reliability and cost. By supplying the output from a plurality of stable circuits including the selected portion to the LED light-emitting element through a constant current control circuit, stable light emission can be obtained without ripples, and the capacitor capacity to be used can be suppressed and reliable. It is characterized by being able to achieve both performance and cost.
本実施例に於いては、図１に概念的に示したように、ＬＥＤ駆動回路に含まれる複数の安定回路がマトリクス状に配置接続されて構成されるようにした。ここで、該ＬＥＤ駆動回路に含まれる複数の安定回路によるマトリクスは、行列を構成する複数の安定回路が少なくとも複数行及び／又は複数列を含むようにした。 In this embodiment, as conceptually shown in FIG. 1, a plurality of stabilizing circuits included in the LED driving circuit are arranged and connected in a matrix. Here, the matrix of the plurality of stable circuits included in the LED drive circuit is configured such that the plurality of stable circuits constituting the matrix includes at least a plurality of rows and / or a plurality of columns.
具体的には、本実施例に於いては複数の安定回路を並列に３つ接続（３行を形成）し、列は３列を備える構成とした。かかる構成により、個々の安定回路に必要な負荷が小さく抑えられ、使用するコンデンサ容量を抑えることが可能となって信頼性の向上とコスト低減を同時に実現することができた。 Specifically, in the present embodiment, a plurality of stable circuits are connected in parallel (three rows are formed), and the columns include three columns. With this configuration, the load required for each stable circuit can be reduced, and the capacitor capacity to be used can be suppressed, thereby improving reliability and reducing costs at the same time.
なお、複数の安定回路によるマトリクスは、行列ともに要素が増えるほどリップル除去やコンデンサ容量の低減に効果があるが、コストアップ要因ともなるから、これらを加味して良好な要素数を選択するのが良い。 Note that a matrix with multiple stable circuits is more effective in eliminating ripple and reducing capacitor capacity as the number of elements increases in both matrices, but it also increases costs, so it is important to select a good number of elements by taking these factors into account. good.
ここで、複数の安定回路を用いて使用するコンデンサ容量を抑えて信頼性とコストを両立することは従前も行われているが、その構成は専ら複数の安定回路を直列に接続して負荷を低減するのみであった。本発明にかかる少なくとも複数の安定回路が並列に接続された構成を含むことにより、より効果的にリップルが除かれて安定した発光が得られ、且つ使用するコンデンサ容量を抑えて信頼性とコストを両立することが可能となった。 Here, it has been practiced to reduce the capacitor capacity to be used by using a plurality of stable circuits to achieve both reliability and cost. However, the configuration is exclusively connected by connecting a plurality of stable circuits in series. It was only reduced. By including a configuration in which at least a plurality of stable circuits according to the present invention are connected in parallel, ripples can be removed more effectively and stable light emission can be obtained, and the capacitance of the capacitors used can be suppressed and reliability and cost can be reduced. It became possible to achieve both.
本発明に於いては、これらの課題を解決し、簡便な構成で安定した発光が得られ、部品点数の削減が可能であり低コストで製造可能であり且つ長期信頼性が向上するとともに、低消費電力を実現するＬＥＤを用いた照明装置及びＬＥＤを用いた照明装置の駆動回路を提供することができた。 In the present invention, these problems are solved, stable light emission can be obtained with a simple configuration, the number of parts can be reduced, manufacturing can be performed at low cost, long-term reliability is improved, and low It was possible to provide a lighting device using an LED that achieves power consumption and a driving circuit for the lighting device using the LED.
また本発明は、同時に部品点数を減少させることにより基板サイズを小型化でき、照明装置全体ををコンパクトにすることが出来るとともに、高性能化することより簡素な部品が使用でき製品原価を下げコストダウンに寄与するＬＥＤを用いた照明装置及びＬＥＤを用いた照明装置の駆動回路を提供することができた。 In addition, the present invention can reduce the board size by reducing the number of parts at the same time, and can make the whole lighting device compact, and by using high performance, simple parts can be used and the product cost can be reduced. It was possible to provide a lighting device using an LED that contributes to down and a driving circuit of the lighting device using the LED.
さらに本発明は、長期にわたる連続使用中に一部の回路が停止しても、機能運転を継続することが出来るため、長期間に亘って信頼性の向上に寄与するＬＥＤを用いた照明装置及びＬＥＤを用いた照明装置の駆動回路を提供することができた。 Furthermore, the present invention can continue functional operation even if some circuits are stopped during continuous use over a long period of time, and therefore an illumination device using an LED that contributes to improving reliability over a long period of time and The drive circuit of the illuminating device using LED could be provided.
本実施例に於いては、該ＬＥＤ駆動回路に用いられる安定回路として、スイッチングレギュレータを用い、その制御方式は電圧モードであってその動作方式はパルス周波数変調方式とした。ここで、該ＬＥＤ駆動回路に用いられる安定回路としてスイッチングレギュレータを用いる場合、その制御方式は電圧モード、電流モード或いはヒステリシス制御の何れかが好適に用いられ、またその動作方式はパルス周波数変調方式或いはパルス幅変調方式の何れかが好適に用いられる。さらに、スイッチングレギュレータとしてはチョッパ型安定器を含むものでもよい。 In this embodiment, a switching regulator is used as a stable circuit used in the LED driving circuit, its control method is a voltage mode, and its operation method is a pulse frequency modulation method. Here, when a switching regulator is used as a stabilizing circuit used in the LED driving circuit, any one of a voltage mode, a current mode, and a hysteresis control is suitably used as the control method, and the operation method is a pulse frequency modulation method or Any of the pulse width modulation methods is preferably used. Further, the switching regulator may include a chopper type ballast.
また本実施例に於いては、該ＬＥＤ駆動回路に用いられる一定電流制御回路として、電流検知抵抗の両端の電圧降下が一定になるように負荷抵抗によってスイッチの動作抵抗を変えることにより一定電流を出力する、スイッチング型一定電流制御回路を用いた。ここで、該ＬＥＤ駆動回路に用いられる一定電流制御回路としては、電流検知抵抗の両端の電圧降下が一定になるようにフィードバック回路によって可変抵抗の動作抵抗を変えることにより一定電流を出力する、リニア型一定電流制御回路も好適に用いられる。 In this embodiment, as a constant current control circuit used in the LED drive circuit, a constant current is obtained by changing the operating resistance of the switch by the load resistance so that the voltage drop across the current detection resistor is constant. A switching type constant current control circuit that outputs is used. Here, the constant current control circuit used in the LED drive circuit is a linear current output by changing the operating resistance of the variable resistor by a feedback circuit so that the voltage drop across the current detection resistor is constant. A type constant current control circuit is also preferably used.
また、該ＬＥＤ駆動回路に用いられる一定電流制御回路における抵抗値の制御は、トランジスタにより行われることが有効であり、さらに、該ＬＥＤ駆動回路に用いられる一定電流制御回路に用いられるトランジスタは、ＦＥＴトランジスタ、バイポーラトランジスタ或いはＩＧＢＴの何れかを用いると良い。 In addition, it is effective that the resistance value in the constant current control circuit used in the LED drive circuit is controlled by a transistor, and further, the transistor used in the constant current control circuit used in the LED drive circuit is an FET. Any of a transistor, a bipolar transistor, or an IGBT may be used.
かかる構成により、本発明にかかるＬＥＤを用いた照明装置及びＬＥＤを用いた照明装置の駆動回路は、ＬＥＤ発光素子に供給する駆動電流を効率的に安定化させ、且つ使用するコンデンサ容量を抑えて信頼性とコストを両立するのもであって、 並列接続された部分を含む複数の安定回路からの出力を一定電流制御回路を介してＬＥＤ発光素子に供給することにより、リップルが除かれて安定した発光が得られ、且つ使用するコンデンサ容量を抑えて信頼性とコストを両立することができるＬＥＤを用いた照明装置及びＬＥＤを用いた照明装置の駆動回路を提供することが出来た。 With this configuration, the lighting device using the LED and the driving circuit of the lighting device using the LED according to the present invention efficiently stabilize the driving current supplied to the LED light emitting element and suppress the capacitor capacity to be used. It is also compatible with reliability and cost. By supplying the output from a plurality of stable circuits including parts connected in parallel to the LED light emitting element via a constant current control circuit, the ripple is eliminated and stable. It was possible to provide an illuminating device using an LED and a driving circuit for the illuminating device using an LED, which can achieve both the reliability and cost by suppressing the capacitor capacity to be used.
本実施例に於いては、実施例１の構成に対して該ＬＥＤ駆動回路に用いられる安定回路として、リニアレギュレータを用いた。また、該ＬＥＤ駆動回路に用いられる一定電流制御回路における抵抗値の制御は、ＦＥＴトランジスタを用いた。 In the present embodiment, a linear regulator was used as a stable circuit used in the LED driving circuit with respect to the configuration of the first embodiment. The resistance value in the constant current control circuit used in the LED drive circuit was controlled using an FET transistor.
また、本実施例に於いては複数の安定回路を並列に２つ接続（２行を形成）し、列は１列とした構成とした。かかる構成により、個々の安定回路に必要な負荷が小さく抑えられ、使用するコンデンサ容量を抑えることが可能となって信頼性の向上とコスト低減を同時に実現することができた。 In this embodiment, a plurality of stable circuits are connected in parallel (two rows are formed), and one column is provided. With this configuration, the load required for each stable circuit can be reduced, and the capacitor capacity to be used can be suppressed, thereby improving reliability and reducing costs at the same time.
本発明に係る本発明に係るＬＥＤを用いた照明装置及びＬＥＤを用いた照明装置の駆動回路は、ＬＥＤ発光素子に供給する駆動電流を効率的に安定化させ、且つ使用するコンデンサ容量を抑えて信頼性とコストを両立するのもであって、 並列接続された部分を含む複数の安定回路からの出力を一定電流制御回路を介してＬＥＤ発光素子に供給することにより、リップルが除かれて安定した発光が得られ、且つ使用するコンデンサ容量を抑えて信頼性とコストを両立することができるＬＥＤを用いた照明装置及びＬＥＤを用いた照明装置の駆動回路を提供出来、以って産業上の利用可能性は大であるといえる。 The illumination device using the LED according to the present invention and the drive circuit of the illumination device using the LED according to the present invention efficiently stabilize the drive current supplied to the LED light emitting element and suppress the capacitor capacity to be used. It is also compatible with reliability and cost. By supplying the output from a plurality of stable circuits including parts connected in parallel to the LED light emitting element via a constant current control circuit, the ripple is eliminated and stable. Illuminating device using an LED and a driving circuit for the illuminating device using an LED, which can achieve both reliability and cost by suppressing the capacitor capacity to be used. The availability is great.
１１ 全波整流または同期整流回路
１２、１３、１４ 安定回路
１５ 一定電流制御回路
１６ ＬＥＤ発光素子
11 Full wave rectification or synchronous rectification circuit 12, 13, 14 Stabilization circuit 15 Constant current control circuit 16 LED light emitting element
Claims (28)
複数のＬＥＤ発光素子と、これを駆動するＬＥＤ駆動回路を備え、
該ＬＥＤ駆動回路はＬＥＤ発光素子に供給する駆動電流を効率的に安定化させ、且つ使用するコンデンサ容量を抑えて信頼性とコストを両立するものであり、
該ＬＥＤ駆動回路は複数の安定回路が並列に接続される構成を含み、
該並列接続された部分を含む複数の安定回路からの出力を一定電流制御回路を介してＬＥＤ発光素子に供給することにより、
リップルが除かれて安定した発光が得られ、且つ使用するコンデンサ容量を抑えて信頼性とコストを両立することができることを特徴とする、
ＬＥＤを用いた照明装置。 An illumination device using LEDs,
A plurality of LED light emitting elements and an LED driving circuit for driving the LED light emitting elements are provided.
The LED drive circuit stabilizes the drive current supplied to the LED light-emitting element efficiently, and suppresses the capacitor capacity to be used to achieve both reliability and cost.
The LED drive circuit includes a configuration in which a plurality of stable circuits are connected in parallel,
By supplying outputs from a plurality of stable circuits including the parallel-connected portions to the LED light-emitting elements via a constant current control circuit,
Ripple is removed, stable light emission is obtained, and the capacity of the capacitor to be used can be suppressed to achieve both reliability and cost.
Lighting device using LED.
複数の安定回路がマトリクス状に配置接続されて構成されることを特徴とする、
請求項１記載のＬＥＤを用いた照明装置。 The LED drive circuit
A plurality of ballast circuits are arranged and connected in a matrix form,
An illumination device using the LED according to claim 1.
行列を構成する複数の安定回路が少なくとも複数行及び／又は複数列を含むものであることを特徴とする、
請求項２記載のＬＥＤを用いた照明装置。 A matrix of a plurality of stable circuits included in the LED driving circuit is:
The plurality of ballast circuits constituting the matrix includes at least a plurality of rows and / or a plurality of columns.
An illumination device using the LED according to claim 2.
複数の安定回路が少なくともが並列に接続される構成を含み、さらに並列接続された単位及び／又は直列接続された単位が混在する構成を含むものであることを特徴とする、
請求項１記載のＬＥＤを用いた照明装置。 The plurality of ballast circuits included in the LED driving circuit are:
A plurality of stable circuits includes a configuration in which at least a plurality of stable circuits are connected in parallel, and further includes a configuration in which units connected in parallel and / or units connected in series are mixed.
An illumination device using the LED according to claim 1.
スイッチングレギュレータであることを特徴とする、
請求項１乃至４の何れか一請求項に記載のＬＥＤを用いた照明装置。 The ballast circuit used in the LED drive circuit is:
It is a switching regulator,
The illuminating device using LED as described in any one of Claims 1 thru | or 4.
その制御方式は電圧モード、電流モード或いはヒステリシス制御の何れかであることを特徴とする、
請求項５記載のＬＥＤを用いた照明装置。 The ballast circuit used in the LED drive circuit is a switching regulator,
The control method is either voltage mode, current mode or hysteresis control,
An illumination device using the LED according to claim 5.
その動作方式はパルス周波数変調方式或いはパルス幅変調方式の何れかであることを特徴とする、
請求項５に記載のＬＥＤを用いた照明装置。 The ballast circuit used in the LED drive circuit is a switching regulator,
The operation method is either a pulse frequency modulation method or a pulse width modulation method,
An illumination device using the LED according to claim 5.
該スイッチングレギュレータはチョッパ型安定器を含むことを特徴とする、
請求項５乃至７の何れか一請求項に記載のＬＥＤを用いた照明装置。 The ballast circuit used in the LED drive circuit is a switching regulator,
The switching regulator includes a chopper-type ballast,
The illuminating device using LED as described in any one of Claims 5 thru | or 7.
リニアレギュレータであることを特徴とする、
請求項１乃至４の何れか一請求項に記載のＬＥＤを用いた照明装置。 The ballast circuit used in the LED drive circuit is:
It is a linear regulator,
The illuminating device using LED as described in any one of Claims 1 thru | or 4.
電流検知抵抗の両端の電圧降下が一定になるように負荷抵抗によってスイッチの動作抵抗を変えることにより一定電流を出力する、
スイッチング型一定電流制御回路であることを特徴とする、
請求項１乃至９の何れか一請求項に記載のＬＥＤを用いた照明装置。 The constant current control circuit used in the LED driving circuit is:
A constant current is output by changing the operating resistance of the switch according to the load resistance so that the voltage drop across the current detection resistor is constant.
It is a switching type constant current control circuit,
The illuminating device using LED as described in any one of Claims 1 thru | or 9.
電流検知抵抗の両端の電圧降下が一定になるようにフィードバック回路によって可変抵抗の動作抵抗を変えることにより一定電流を出力する、
リニア型一定電流制御回路であることを特徴とする、
請求項１乃至９の何れか一請求項に記載のＬＥＤを用いた照明装置。 The constant current control circuit used in the LED driving circuit is:
A constant current is output by changing the operating resistance of the variable resistor using a feedback circuit so that the voltage drop across the current detection resistor is constant.
It is a linear constant current control circuit,
The illuminating device using LED as described in any one of Claims 1 thru | or 9.
トランジスタにより行われることを特徴とする、
請求項１１記載のＬＥＤを用いた照明装置。 Control of the resistance value in the constant current control circuit used in the LED drive circuit is as follows:
It is performed by a transistor,
The illuminating device using LED of Claim 11.
ＦＥＴトランジスタ、バイポーラトランジスタ或いはＩＧＢＴの何れかであることを特徴とする、
請求項１２記載のＬＥＤを用いた照明装置。 The transistors used in the constant current control circuit used in the LED drive circuit are:
It is one of FET transistor, bipolar transistor or IGBT,
An illumination device using the LED according to claim 12.
安定回路が並列に配置接続された部分及び安定回路が直列に配置接続された部分を含んで構成されることを特徴とする、
請求項１乃至１３の何れか一請求項に記載のＬＥＤを用いた照明装置。 The plurality of ballast circuits of the LED driving circuit are:
The ballast circuit is configured to include a portion in which the ballast circuit is arranged and connected in parallel and a portion in which the ballast circuit is arranged and connected in series.
The illuminating device using LED as described in any one of Claims 1 thru | or 13.
該ＬＥＤ駆動回路はＬＥＤ発光素子に供給する駆動電流を効率的に安定化させ、且つ使用するコンデンサ容量を抑えて信頼性とコストを両立するものであり、
該ＬＥＤ駆動回路は複数の安定回路が並列に接続される構成を含み、
該並列接続された部分を含む複数の安定回路からの出力を一定電流制御回路を介してＬＥＤ発光素子に供給することにより、
リップルが除かれて安定した発光が得られ、且つ使用するコンデンサ容量を抑えて信頼性とコストを両立することができることを特徴とする、
ＬＥＤを用いた照明装置に用いる駆動回路。 A driving circuit used in an illumination device using an LED,
The LED drive circuit stabilizes the drive current supplied to the LED light-emitting element efficiently, and suppresses the capacitor capacity to be used to achieve both reliability and cost.
The LED drive circuit includes a configuration in which a plurality of stable circuits are connected in parallel,
By supplying outputs from a plurality of stable circuits including the parallel-connected portions to the LED light-emitting elements via a constant current control circuit,
Ripple is removed, stable light emission is obtained, and the capacity of the capacitor to be used can be suppressed to achieve both reliability and cost.
A drive circuit used in an illumination device using an LED.
複数の安定回路がマトリクス状に配置接続されて構成されることを特徴とする、
請求項１５記載のＬＥＤを用いた照明装置に用いる駆動回路。 The LED drive circuit
A plurality of ballast circuits are arranged and connected in a matrix form,
The drive circuit used for the illuminating device using LED of Claim 15.
行列を構成する複数の安定回路が少なくとも複数行及び／又は複数列を含むものであることを特徴とする、
請求項１６記載のＬＥＤを用いた照明装置に用いる駆動回路。 A matrix of a plurality of stable circuits included in the LED driving circuit is:
The plurality of ballast circuits constituting the matrix includes at least a plurality of rows and / or a plurality of columns.
The drive circuit used for the illuminating device using LED of Claim 16.
複数の安定回路が少なくともが並列に接続される構成を含み、さらに並列接続された単位及び／又は直列接続された単位が混在する構成を含むものであることを特徴とする、
請求項１５記載のＬＥＤを用いた照明装置に用いる駆動回路。 The plurality of ballast circuits included in the LED driving circuit are:
A plurality of stable circuits includes a configuration in which at least a plurality of stable circuits are connected in parallel, and further includes a configuration in which units connected in parallel and / or units connected in series are mixed.
The drive circuit used for the illuminating device using LED of Claim 15.
スイッチングレギュレータであることを特徴とする、
請求項１５乃至１８の何れか一請求項に記載のＬＥＤを用いた照明装置に用いる駆動回路。 The ballast circuit used in the LED drive circuit is:
It is a switching regulator,
The drive circuit used for the illuminating device using LED as described in any one of Claims 15 thru | or 18.
その制御方式は電圧モード、電流モード或いはヒステリシス制御の何れかであることを特徴とする、
請求項１９記載のＬＥＤを用いた照明装置に用いる駆動回路。 The ballast circuit used in the LED drive circuit is a switching regulator,
The control method is either voltage mode, current mode or hysteresis control,
The drive circuit used for the illuminating device using LED of Claim 19.
その動作方式はパルス周波数変調方式或いはパルス幅変調方式の何れかであることを特徴とする、
請求項１９に記載のＬＥＤを用いた照明装置に用いる駆動回路。 The ballast circuit used in the LED drive circuit is a switching regulator,
The operation method is either a pulse frequency modulation method or a pulse width modulation method,
The drive circuit used for the illuminating device using LED of Claim 19.
該スイッチングレギュレータはチョッパ型安定器を含むことを特徴とする、
請求項１９乃至２１の何れか一請求項に記載のＬＥＤを用いた照明装置に用いる駆動回路。 The ballast circuit used in the LED drive circuit is a switching regulator,
The switching regulator includes a chopper-type ballast,
The drive circuit used for the illuminating device using LED as described in any one of Claims 19 thru | or 21.
リニアレギュレータであることを特徴とする、
請求項１５乃至１８の何れか一請求項に記載のＬＥＤを用いた照明装置に用いる駆動回路。 The ballast circuit used in the LED drive circuit is:
It is a linear regulator,
The drive circuit used for the illuminating device using LED as described in any one of Claims 15 thru | or 18.
電流検知抵抗の両端の電圧降下が一定になるように負荷抵抗によってスイッチの動作抵抗を変えることにより一定電流を出力する、
スイッチング型一定電流制御回路であることを特徴とする、
請求項１５乃至２３の何れか一請求項に記載のＬＥＤを用いた照明装置に用いる駆動回路。 The constant current control circuit used in the LED driving circuit is:
A constant current is output by changing the operating resistance of the switch according to the load resistance so that the voltage drop across the current detection resistor is constant.
It is a switching type constant current control circuit,
The drive circuit used for the illuminating device using LED as described in any one of Claims 15 thru | or 23.
電流検知抵抗の両端の電圧降下が一定になるようにフィードバック回路によって可変抵抗の動作抵抗を変えることにより一定電流を出力する、
リニア型一定電流制御回路であることを特徴とする、
請求項１５乃至２３の何れか一請求項に記載のＬＥＤを用いた照明装置に用いる駆動回路。 The constant current control circuit used in the LED driving circuit is:
A constant current is output by changing the operating resistance of the variable resistor using a feedback circuit so that the voltage drop across the current detection resistor is constant.
It is a linear constant current control circuit,
The drive circuit used for the illuminating device using LED as described in any one of Claims 15 thru | or 23.
トランジスタにより行われることを特徴とする、
請求項２５記載のＬＥＤを用いた照明装置に用いる駆動回路。 Control of the resistance value in the constant current control circuit used in the LED drive circuit is as follows:
It is performed by a transistor,
The drive circuit used for the illuminating device using LED of Claim 25.
ＦＥＴトランジスタ、バイポーラトランジスタ或いはＩＧＢＴの何れかであることを特徴とする、
請求項２６記載のＬＥＤを用いた照明装置に用いる駆動回路。 The transistors used in the constant current control circuit used in the LED drive circuit are:
It is one of FET transistor, bipolar transistor or IGBT,
The drive circuit used for the illuminating device using LED of Claim 26.
安定回路が並列に配置接続された部分及び安定回路が直列に配置接続された部分を含んで構成されることを特徴とする、
請求項１５乃至２７の何れか一請求項に記載のＬＥＤを用いた照明装置に用いる駆動回路。 The plurality of ballast circuits of the LED driving circuit are:
The ballast circuit is configured to include a portion in which the ballast circuit is arranged and connected in parallel and a portion in which the ballast circuit is arranged and connected in series.
A drive circuit used for an illumination device using the LED according to any one of claims 15 to 27.
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| JP2015238112A JP2017103193A (en) | 2015-12-05 | 2015-12-05 | Illumination device using led, and drive circuit for illumination device using led |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020250076A1 (en) * | 2019-06-12 | 2020-12-17 | Shinobu Sekkei Co., Ltd. | Led lighting device and driving circuit for led |
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| JP2006103477A (en) * | 2004-10-05 | 2006-04-20 | Koito Mfg Co Ltd | Lighting control circuit of lighting fixture for vehicle |
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| JP2010016378A (en) * | 2008-06-30 | 2010-01-21 | Green Solution Technology Inc | Led driving circuit, led driving control unit and transistor switch module thereof |
| JP2011009701A (en) * | 2009-05-19 | 2011-01-13 | Rohm Co Ltd | Drive circuit of light-emitting diode, light-emitting device and display device using the same, and method of protecting the same |
| JP2013534403A (en) * | 2010-08-18 | 2013-09-02 | フィンシックス コーポレイション | Ultra high frequency switching cell based power converter |
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| JP2006103477A (en) * | 2004-10-05 | 2006-04-20 | Koito Mfg Co Ltd | Lighting control circuit of lighting fixture for vehicle |
| WO2007069371A1 (en) * | 2005-12-12 | 2007-06-21 | Mitsubishi Electric Corporation | Light emitting diode lighting device and vehicle light lighting device using same |
| JP2010016378A (en) * | 2008-06-30 | 2010-01-21 | Green Solution Technology Inc | Led driving circuit, led driving control unit and transistor switch module thereof |
| JP2011009701A (en) * | 2009-05-19 | 2011-01-13 | Rohm Co Ltd | Drive circuit of light-emitting diode, light-emitting device and display device using the same, and method of protecting the same |
| JP2013534403A (en) * | 2010-08-18 | 2013-09-02 | フィンシックス コーポレイション | Ultra high frequency switching cell based power converter |
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| WO2020250076A1 (en) * | 2019-06-12 | 2020-12-17 | Shinobu Sekkei Co., Ltd. | Led lighting device and driving circuit for led |
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