JPH11307815A - Collective led lamp for ac power source - Google Patents
Collective led lamp for ac power sourceInfo
- Publication number
- JPH11307815A JPH11307815A JP11323098A JP11323098A JPH11307815A JP H11307815 A JPH11307815 A JP H11307815A JP 11323098 A JP11323098 A JP 11323098A JP 11323098 A JP11323098 A JP 11323098A JP H11307815 A JPH11307815 A JP H11307815A
- Authority
- JP
- Japan
- Prior art keywords
- transistor
- led
- series
- power supply
- voltage
- 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.)
- Granted
Links
Landscapes
- Led Devices (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、多数の発光ダイオ
ード（ＬＥＤ）を交流電源によって駆動する交流電源用
ＬＥＤ集合ランプに関し、より具体的にはＬＥＤ集合ラ
ンプにおける電気回路の改良に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an LED collective lamp for an AC power supply that drives a large number of light emitting diodes (LEDs) by an AC power supply, and more particularly to an improvement in an electric circuit in the LED collective lamp.
【０００２】[0002]
【従来の技術】高輝度ＬＥＤの小型／長寿命／低消費電
力といった特徴を利用して、多数のＬＥＤを光源とし、
その電力源として一般の家庭用交流電源を使用する交流
電源用ＬＥＤ集合ランプがある。光源となるＬＥＤは半
導体であり、定格電流値以下の直流電流によって駆動し
なくてはならない。従って、ＬＥＤ集合ランプを家庭用
の交流電源で点灯させる場合、各ＬＥＤに定格以上の電
流が流れないようにするために何らかの電流制限手段が
必要となる。2. Description of the Related Art A large number of LEDs are used as a light source by utilizing the features of high brightness LEDs such as small size / long life / low power consumption.
As the power source, there is an LED lamp for an AC power supply using a general household AC power supply. The LED serving as a light source is a semiconductor, and must be driven by a direct current of a rated current value or less. Therefore, when the LED collective lamp is lit by a home AC power supply, some kind of current limiting means is required to prevent a current exceeding the rating from flowing through each LED.
【０００３】その手段としては、ＬＥＤ集合ランプのＬ
ＥＤの個数を多くして最大電圧時でも定格以下の電流が
流れるようにする方法や、ＬＥＤの個数に合わせて定格
以上の電流が流れないようにするための電流制限回路を
設ける方法がある。[0003] As the means, L of the LED collective lamp
There are a method of increasing the number of EDs so that a current below the rating flows even at the maximum voltage, and a method of providing a current limiting circuit for preventing a current exceeding the rating from flowing according to the number of LEDs.
【０００４】電流制限回路の構成としては、降圧用抵抗
器を用いるものがある。これは電源電圧を抵抗器によっ
て降圧し、この降圧後の電圧をＬＥＤの端子間に印加す
ることで電流を制限している。電圧降下用抵抗器を含む
点灯回路を備えたＬＥＤ集合ランプとしては、特開昭５
８−２８８７９号、特開昭６２−３２６６４号、特開昭
６３−１２４４７９号の各号公報にその技術が開示され
ている。また、特開平７−２７３３７１号公報に開示さ
れた技術では、抵抗器に変えて大容量のコンデンサによ
って降圧している。As a configuration of the current limiting circuit, there is a configuration using a step-down resistor. In this method, the power supply voltage is stepped down by a resistor, and the stepped-down voltage is applied between the terminals of the LED to limit the current. An LED collective lamp provided with a lighting circuit including a voltage drop resistor is disclosed in
The techniques are disclosed in JP-A-8-28879, JP-A-62-32664, and JP-A-63-124479. In the technique disclosed in Japanese Patent Application Laid-Open No. 7-273371, the voltage is lowered by using a large-capacity capacitor instead of a resistor.
【０００５】サイリスタなどを用いて交流電圧波形にお
ける位相の一部の電圧波形をＬＥＤに印加する方法もあ
る（特開平６−２４２７３３号公報に開示）。さらに、
ＬＥＤに流れる電流を検知し、その電流値に従ってＬＥ
Ｄに流す電流を増減させる定電流制御回路もよく知られ
ている。電源電圧が所定値以上になると、ほぼ一定の電
流がＬＥＤに流れるようになっている。There is also a method of applying a voltage waveform of a part of the phase of an AC voltage waveform to an LED using a thyristor or the like (disclosed in JP-A-6-242733). further,
Detects the current flowing through the LED and sets the LE according to the current value.
A constant current control circuit for increasing or decreasing the current flowing through D is also well known. When the power supply voltage exceeds a predetermined value, a substantially constant current flows to the LED.
【０００６】[0006]
【発明が解決しようとする課題】電流制限手段としてＬ
ＥＤの個数を増やした場合、ＬＥＤに流れる電流は交流
電圧波形におけるピーク時に最大となる。最大電流がＬ
ＥＤに流れるのは交流電源の周期においてごく一部であ
る。そのため、全周期のほとんどにおいてＬＥＤの発光
輝度は低いものとなってしまう。また、低電圧時ではＬ
ＥＤに電流がほとんど流れないため点灯せず、交流電源
の周期によってフリッカーが生じる。したがって、ＬＥ
Ｄ集合ランプは暗くてちらつき多い照明器具となる。As the current limiting means, L
When the number of EDs is increased, the current flowing through the LED becomes maximum at the peak in the AC voltage waveform. Maximum current is L
What flows to the ED is only a small part in the cycle of the AC power supply. Therefore, the emission luminance of the LED is low in most of the entire cycle. Also, at low voltage, L
Since almost no current flows through the ED, the ED is not turned on, and flicker occurs due to the cycle of the AC power supply. Therefore, LE
D-collection lamps are dark and flickering lighting fixtures.
【０００７】電圧降下用抵抗器による電流制限手段で
は、この抵抗器に大電流を流している。そのため、低消
費電力というＬＥＤの特徴を生かせないし、抵抗器が発
熱して実装上いろいろな問題が生じる。これを回避する
ために放熱対策を施せば、ランプの小型化が困難とな
る。また、コストも増加させる。確かに、コンデンサに
よって降圧すれば、発熱は抵抗に比べれば少ない小さ
い。しかし、大容量のコンデンサを必要とするため、ラ
ンプの大型化は避けられない。In the current limiting means using a voltage drop resistor, a large current flows through this resistor. Therefore, the characteristics of the LED, that is, low power consumption, cannot be utilized, and the resistor generates heat, which causes various problems in mounting. If measures for heat dissipation are taken to avoid this, it is difficult to reduce the size of the lamp. It also increases costs. Indeed, if the voltage is lowered by a capacitor, the heat generation is smaller and smaller than the resistance. However, since a large-capacity capacitor is required, an increase in the size of the lamp is inevitable.
【０００８】電源電圧波形の低電圧部分に相当する位相
のときだけ電流を流す場合、ＬＥＤには交流波形の周期
に従って離散的に電流が流れることになる。そのため、
フリッカーが生じる。また、周期のほとんどの部分でＬ
ＥＤが点灯しないことになり、照明も暗くなってしま
う。したがって、高輝度であるＬＥＤの長所を有効に利
用しているとは言い難い。When a current flows only when the phase corresponds to the low voltage portion of the power supply voltage waveform, the current flows through the LED discretely in accordance with the cycle of the AC waveform. for that reason,
Flicker occurs. Also, for most of the period, L
The ED will not light up and the illumination will be dark. Therefore, it cannot be said that the advantages of high-brightness LEDs are effectively used.
【０００９】定電流制御回路を用いる場合でも問題が多
い。その一例を図４に示した。図４Ａ、Ｂは、電源電圧
と発光駆動電流との関係を直列に接続されたＬＥＤの個
数による違いとして示した特性図である。Ａは直列に接
続するＬＥＤの個数が少ない場合であり、印加できる電
圧は低く、交流電源周期のほとんどの部分で定電流制御
が行われる。そのため、定電流制御時における電力損失
が大きくその分のほとんどは熱に変わる。したがって高
圧用抵抗器を用いた場合と同じ問題が生じる。また、Ｂ
に示すようにＬＥＤの個数が多い場合、高電圧部で定電
流制御がなされるので電力損失は少ない。しかし、周期
の多くの部分でＬＥＤには定格以下の電流しか流れな
い。したがって、暗くてちらつく照明となる。Even when a constant current control circuit is used, there are many problems. An example is shown in FIG. 4A and 4B are characteristic diagrams showing the relationship between the power supply voltage and the light emission drive current as a difference depending on the number of LEDs connected in series. A is a case where the number of LEDs connected in series is small, the voltage that can be applied is low, and constant current control is performed in most parts of the AC power supply cycle. Therefore, the power loss during the constant current control is large, and most of the power is converted to heat. Therefore, the same problem as when a high-voltage resistor is used occurs. Also, B
As shown in (1), when the number of LEDs is large, the constant current control is performed in the high voltage section, so that the power loss is small. However, for much of the cycle, less than the rated current flows through the LED. Therefore, the lighting is dark and flickering.
【００１０】そこで本発明は、明るくてフリッカーがな
く、しかも電力損失が少なくて小型化や低コスト化を達
成できる交流電源用ＬＥＤ集合ランプを提供することを
目的としている。SUMMARY OF THE INVENTION It is an object of the present invention to provide an LED lamp for an AC power supply which is bright, has no flicker, has a small power loss, and can be reduced in size and cost.
【００１１】[0011]
【課題を解決するための手段】本発明の交流電源用ＬＥ
Ｄ集合ランプは、多数のＬＥＤを直列接続した直列ＬＥ
Ｄ群と、前記整流回路の出力端に直列ＬＥＤ群と直列に
接続された第１トランジスタと、第１トランジスタを定
電流駆動する定電流駆動回路と、前記第１トランジスタ
と並列に接続された第２トランジスタと、前記整流回路
の出力電圧が基準電圧以下のときに第２トランジスタを
オン駆動する電圧比較スイッチング駆動回路とを備えて
いる。また、第１トランジスタを定電流素子に置換する
とともに、定電流駆動回路を省略してもよい。An AC power supply LE according to the present invention.
The D collective lamp is a series LE in which many LEDs are connected in series.
D group, a first transistor connected in series with the series LED group at the output end of the rectifier circuit, a constant current drive circuit for driving the first transistor with a constant current, and a second transistor connected in parallel with the first transistor. A second transistor; and a voltage comparison switching drive circuit that turns on the second transistor when an output voltage of the rectifier circuit is equal to or lower than a reference voltage. Further, the first transistor may be replaced with a constant current element, and the constant current driving circuit may be omitted.
【００１２】より好ましくは、前記直列ＬＥＤ群の各Ｌ
ＥＤにそれぞれバイパス抵抗を並列に接続することであ
る。また、前記直列ＬＥＤ群が複数ある構成とし、それ
ら複数の直列ＬＥＤ群が並列接続されて整流回路の出力
端と、第１トランジスタあるいは定電流素子と、第２ト
ランジスタとに接続されていることととしてもよい。More preferably, each L of the series LED group
That is, bypass resistors are connected in parallel to the EDs. In addition, the plurality of serial LED groups are configured to be connected in parallel, and the plurality of serial LED groups are connected in parallel and connected to an output terminal of a rectifier circuit, a first transistor or a constant current element, and a second transistor. It may be.
【００１３】さらに、整流回路を設けず、交流電源の入
力端に直結して交流の半波で動作するようにしてもよ
い。Further, a rectifier circuit may not be provided, and the rectifier circuit may be directly connected to the input terminal of the AC power supply to operate with an AC half-wave.
【００１４】[0014]
【発明の実施の形態】図１は本発明の実施例における交
流電源用ＬＥＤ集合ランプ（ＬＥＤランプ）の外形図を
示している。電球用ソケットに接続して交流電源に接続
するための口金部１を備えたケース２内には多数のＬＥ
Ｄを直列に接続してなる直列ＬＥＤ群とその点灯回路と
が収納されている。光源となる直列ＬＥＤ群からの光は
ケースの光透過窓３を通してケース２外部へ照射され
る。もちろん、ＬＥＤランプの形態はこれに限らず、照
明器具本体部と電源接続部とを電源コードを介して分離
させてもよい。この場合、電源接続部をローゼット用の
口金としたり、通常の電源プラグとしたりしてもよい。FIG. 1 is an external view of an LED lamp for an AC power supply (LED lamp) according to an embodiment of the present invention. A large number of LEs are provided in a case 2 having a base 1 for connecting to a light bulb socket and connecting to an AC power supply.
A series LED group formed by connecting D in series and a lighting circuit thereof are housed. Light from the series LED group serving as a light source is emitted to the outside of the case 2 through the light transmission window 3 of the case. Of course, the form of the LED lamp is not limited to this, and the lighting fixture main body and the power supply connection part may be separated via a power cord. In this case, the power supply connection portion may be a base for a rosette or a normal power plug.
【００１５】図２は、本実施例におけるＬＥＤランプの
回路構成の概略を示している。交流電源ＡＣを全波整流
するダイオードブリッジからなる整流回路１０と、多数
のＬＥＤを直列接続した直列ＬＥＤ群と、各ＬＥＤにそ
れぞれ並列接続されるバイパス抵抗Ｒｂと、ｎｐｎトラ
ンジスタＱ１と、このトランジスタＱ１を定電流駆動す
る定電流駆動回路（Ｑ２、Ｒ１、Ｒ２）と、ｎチャンネ
ル電界効果トランジスタＱ３と、このトランジスタＱ３
をスイッチングするための電圧比較スイッチング駆動回
路（Ｑ４、Ｒ３〜Ｒ６）とを含んで構成されている。FIG. 2 schematically shows the circuit configuration of the LED lamp in this embodiment. A rectifier circuit 10 composed of a diode bridge for full-wave rectification of an AC power supply AC, a series LED group in which a large number of LEDs are connected in series, a bypass resistor Rb connected in parallel to each LED, an npn transistor Q1, and this transistor Q1 Current driving circuit (Q2, R1, R2) for driving the transistor at a constant current, an n-channel field effect transistor Q3, and a transistor Q3
And a voltage comparison switching drive circuit (Q4, R3 to R6) for switching.
【００１６】整流回路１０の出力端には直列ＬＥＤ群と
バイパス抵抗Ｒｂを直列接続してなるバイパス抵抗群
と、トランジスタＱ１と、このトランジスタＱ１に並列
接続されたトランジスタＱ３とが直列に接続されてい
る。各バイパス抵抗Ｒｂは、並列接続されたＬＥＤが断
線した場合にそのバイパス抵抗Ｒｂを介して隣接するＬ
ＥＤに電流を流してＬＥＤランプが消灯するのを防止す
るためのものである。以下、この回路の動作を説明す
る。At the output terminal of the rectifier circuit 10, a bypass resistor group formed by connecting a series LED group and a bypass resistor Rb in series, a transistor Q1, and a transistor Q3 connected in parallel to the transistor Q1 are connected in series. I have. Each of the bypass resistors Rb is connected to the adjacent L via the bypass resistor Rb when the LED connected in parallel is disconnected.
This is to prevent the LED lamp from being turned off by supplying a current to the ED. Hereinafter, the operation of this circuit will be described.
【００１７】後述のようにトランジスタＱ３がオフ状態
のときは、直列ＬＥＤ群を発光駆動する電流は、トラン
ジスタＱ１と定電流駆動回路側へ流れる。トランジスタ
Ｑ３がＯＮ状態のときは大部分の発光駆動電流はトラン
ジスタＱ３側へ流れる。As will be described later, when the transistor Q3 is off, a current for driving the series LED group to emit light flows to the transistor Q1 and the constant current drive circuit side. When the transistor Q3 is in the ON state, most of the light emission drive current flows to the transistor Q3 side.
【００１８】トランジスタＱ３は電圧比較スイッチング
駆動回路（以下、スイッチング駆動回路）によって電源
電圧が低電圧であるときにオン状態となる。分圧抵抗Ｒ
３、Ｒ４は全波整流された電源電圧に従った電位を分圧
点ｂに発生させる。スイッチング駆動回路のｎチャンネ
ル電界効果トランジスタＱ４はこの分圧点ｂの電位が所
定値以下のときにオン状態となる。これによって、トラ
ンジスタＱ４のソース電位（Ｑ３のゲート電位）がほぼ
０ｖとなり、トランジスタＱ３がオン状態になる。電源
電圧がその周期に従って増加し、分圧点ｂの電位が所定
値を越えるとトランジスタＱ４がオフになる。このと
き、分圧抵抗Ｒ５、Ｒ６による分圧点ｃの電位はこの所
定値よりも十分大きくなるように抵抗値を設定している
ため、トランジスタＱ３が瞬時にオフ状態になる。The transistor Q3 is turned on when the power supply voltage is low by a voltage comparison switching drive circuit (hereinafter, switching drive circuit). Voltage dividing resistor R
3, R4 generates a potential at the voltage dividing point b in accordance with the full-wave rectified power supply voltage. The n-channel field effect transistor Q4 of the switching drive circuit is turned on when the potential at the voltage dividing point b is lower than a predetermined value. As a result, the source potential of the transistor Q4 (gate potential of Q3) becomes almost 0 V, and the transistor Q3 is turned on. When the power supply voltage increases in accordance with the cycle and the potential at the voltage dividing point b exceeds a predetermined value, the transistor Q4 is turned off. At this time, since the resistance value is set so that the potential of the voltage dividing point c by the voltage dividing resistors R5 and R6 is sufficiently larger than the predetermined value, the transistor Q3 is turned off instantaneously.
【００１９】トランジスタＱ３がオフ状態になると、電
流はトランジスタＱ１および定電流駆動回路側に流れ
る。さらに、定電流駆動回路側へ分流した電流は抵抗Ｒ
２を通ってトランジスタＱ１のベースに流れ込む。電源
電圧の上昇に伴ってベース電流Ｉｂ１が増えると、エミ
ッタ電流Ｉｅ１が増加しコレクタ電流（ＬＥＤを流れる
電流）Ｉｃ１が増加する。When transistor Q3 is turned off, current flows to transistor Q1 and the constant current drive circuit side. Further, the current shunted to the constant current drive circuit side is a resistor R
2 flows into the base of the transistor Q1. When the base current Ib1 increases with an increase in the power supply voltage, the emitter current Ie1 increases and the collector current (current flowing through the LED) Ic1 increases.
【００２０】ｎｐｎトランジスタＱ２のゲート電極は、
エミッタ電流が電流検出抵抗Ｒ１を通るときの電圧降下
検出点ａと接続されている。トランジスタＱ２は、この
ａ点の電位に応じたコレクタ電流Ｉｃ２を流し、トラン
ジスタＱ１のベース電流Ｉｂ１を減少させる。その結
果、トランジスタＱ１のエミッタ電流Ｉｅ１が減少し、
コレクタ電流Ｉｃ１が減少する。従って、トランジスタ
Ｑ１のコレクタ電流Ｉｃ１がほぼ一定に制御される。The gate electrode of the npn transistor Q2 is
It is connected to a voltage drop detection point a when the emitter current passes through the current detection resistor R1. The transistor Q2 allows the collector current Ic2 according to the potential at the point a to flow, and reduces the base current Ib1 of the transistor Q1. As a result, the emitter current Ie1 of the transistor Q1 decreases,
The collector current Ic1 decreases. Therefore, the collector current Ic1 of the transistor Q1 is controlled to be substantially constant.
【００２１】図３Ａ、Ｂに電源電圧の変位にともなって
回路に流れる電流値の変化を示した。Ａは定電流回路の
みで直列ＬＥＤ群を発光駆動させた場合である。低電圧
時では電流があまり流れていないことがわかる。Ｂは本
実施例の回路構成によって直列ＬＥＤ群を発光駆動した
場合である。低電圧時にも確実に電流が流れていること
がわかる。FIGS. 3A and 3B show the change in the value of the current flowing in the circuit with the displacement of the power supply voltage. A is a case where the serial LED group is driven to emit light only by the constant current circuit. It can be seen that current does not flow much at low voltage. B shows a case where the series LED group is driven to emit light by the circuit configuration of the present embodiment. It can be seen that current flows reliably even at low voltage.
【００２２】なお、点灯回路の変更例としては、トラン
ジスタＱ１を定電流ダイオードなどの定電流素子と置換
するとともに、定電流駆動回路を省略した回路構成が考
えられる。また整流回路は必ずしも必要ではなく、交流
電源をそのまま本実施例の回路に接続してもよい。As a modified example of the lighting circuit, a circuit configuration in which the transistor Q1 is replaced with a constant current element such as a constant current diode and the constant current driving circuit is omitted can be considered. Further, a rectifier circuit is not always necessary, and an AC power supply may be directly connected to the circuit of this embodiment.
【００２３】さらに、白色光を得る場合など、特性の違
う三原色（ＲＧＢ）のＬＥＤ毎に直列ＬＥＤ群を設け、
それぞれの直列ＬＥＤ群を並列接続すれば、各直列ＬＥ
Ｄ群のＬＥＤの個数を調整することで駆動回路１つで全
ての色のＬＥＤを効率よく点灯させることができる。Further, for example, when obtaining white light, a series LED group is provided for each of the three primary color (RGB) LEDs having different characteristics.
If each series LED group is connected in parallel, each series LE
By adjusting the number of LEDs in the D group, LEDs of all colors can be efficiently lit by one driving circuit.
【００２４】[0024]
【発明の効果】低電圧時には電圧比較スイッチング駆動
回路によってオンする第２トランジスタによってより多
くの電流を流し、高電圧時には定電流駆動回路によって
駆動される第１トランジスタによって定電流が直列ＬＥ
Ｄ群の各ＬＥＤに流れる。そのため、明るくてフリッカ
ーがなく、しかも電力損失が少なくて小型化や低コスト
化を達成できる交流電源用ＬＥＤ集合ランプを達成する
ことが可能となる。When the voltage is low, more current flows through the second transistor which is turned on by the voltage comparison switching drive circuit, and when the voltage is high, the constant current flows in series LE by the first transistor which is driven by the constant current drive circuit.
It flows to each LED of D group. Therefore, it is possible to achieve an LED lamp for an AC power supply that is bright, has no flicker, has little power loss, and can achieve downsizing and cost reduction.
【００２５】第１トランジスタを定電流素子に置換する
ことで定電流駆動回路が省略され、、回路構成が簡略化
し、低コスト化とＬＥＤ集合ランプの小型軽量化を達成
することができる。By replacing the first transistor with a constant current element, the constant current drive circuit is omitted, the circuit configuration is simplified, the cost can be reduced, and the LED collective lamp can be reduced in size and weight.
【００２６】また、直列ＬＥＤ群の各ＬＥＤにバイパス
抵抗を並列接続することで、あるＬＥＤが断線した場合
でもＬＥＤ集合ランプが消灯することがない。Further, by connecting a bypass resistor to each LED of the series LED group in parallel, even if a certain LED is disconnected, the LED collective lamp will not be turned off.
【００２７】複数の直列ＬＥＤ群を並列に接続すること
で、各直列ＬＥＤ群毎に流れる電流が一定となるように
調整できるため、同一の点灯回路で効率よくそれぞれ直
列ＬＥＤ群のＬＥＤを発光させることができる。By connecting a plurality of serial LED groups in parallel, the current flowing in each serial LED group can be adjusted so as to be constant, so that the LEDs of each serial LED group can emit light efficiently with the same lighting circuit. be able to.
【００２８】整流回路を省略すれば、回路を簡素化し、
さらなるコストダウンと小型化を達成できる。Omitting the rectifier circuit simplifies the circuit,
Further cost reduction and downsizing can be achieved.
【図１】本発明の実施例における交流駆動用ＬＥＤ集合
ランプの外観図である。FIG. 1 is an external view of an AC driving LED collective lamp according to an embodiment of the present invention.
【図２】上記ＬＥＤ集合ランプの回路構成図である。FIG. 2 is a circuit configuration diagram of the LED collective lamp.
【図３】上記回路に流れる電流波形の概略図である。Ａ
は定電流制御された電流についての波形であり、Ｂは回
路全体の電流についての波形である。FIG. 3 is a schematic diagram of a waveform of a current flowing through the circuit. A
Is a waveform of the current controlled by the constant current, and B is a waveform of the current of the entire circuit.
【図４】従来のＬＥＤ集合ランプにおける定電流制御回
路によってＬＥＤを発光駆動したときの電流特性の概略
図である。ＡはＬＥＤの個数が少ない場合であり、Ｂは
ＬＥＤの個数が多い場合のＬＥＤ集合ランプにそれぞれ
対応している。FIG. 4 is a schematic diagram of current characteristics when an LED is driven to emit light by a constant current control circuit in a conventional LED collective lamp. A corresponds to the case where the number of LEDs is small, and B corresponds to the LED collective lamp where the number of LEDs is large.
１０ 整流回路 Ｑ１〜Ｑ４ トランジスタ Ｒ１〜Ｒ６、Ｒｂ 抵抗器 ＡＣ 交流電源 10 Rectifier circuit Q1-Q4 Transistor R1-R6, Rb resistor AC AC power supply
Claims (5)
数のＬＥＤを直列接続した直列ＬＥＤ群と、前記整流回
路の出力端に直列ＬＥＤ群と直列に接続された第１トラ
ンジスタと、第１トランジスタを定電流駆動する定電流
駆動回路と、前記第１トランジスタと並列に接続された
第２トランジスタと、前記整流回路の出力電圧が基準電
圧以下のときに第２トランジスタをオン駆動する電圧比
較スイッチング駆動回路とを備えたことを特徴とする交
流電源用ＬＥＤ集合ランプ。1. A rectifier circuit for full-wave rectification of an AC power supply, a series LED group in which a number of LEDs are connected in series, a first transistor connected in series with the series LED group at an output terminal of the rectifier circuit, A constant current drive circuit that drives one transistor at a constant current; a second transistor connected in parallel with the first transistor; and a voltage comparison that turns on the second transistor when an output voltage of the rectifier circuit is equal to or lower than a reference voltage. An LED collective lamp for an AC power supply, comprising: a switching drive circuit.
タを定電流素子に置換するとともに、前記定電流駆動回
路を省略することを特徴とする交流電源用ＬＥＤ集合ラ
ンプ。2. The LED collective lamp for an AC power supply according to claim 1, wherein the first transistor is replaced with a constant current element, and the constant current drive circuit is omitted.
ＥＤ群の各ＬＥＤにそれぞれバイパス抵抗が並列接続さ
れていることを特徴とする交流電源用ＬＥＤ集合ラン
プ。3. The system according to claim 1, wherein
An LED lamp for an AC power supply, wherein a bypass resistor is connected in parallel to each LED of the ED group.
直列ＬＥＤ群が複数あり、それら複数の直列ＬＥＤ群が
並列接続されて整流回路の出力端と、第１トランジスタ
あるいは定電流素子と、第２トランジスタとに接続され
ていることを特徴とする交流電源用ＬＥＤ集合ランプ。4. The device according to claim 1, wherein the plurality of serial LED groups are provided in a plurality, and the plurality of serial LED groups are connected in parallel to each other to output a rectifier circuit, a first transistor or a constant current element, An LED collective lamp for an AC power supply, which is connected to a second transistor.
整流回路を設けず、交流電源の入力端に直結して交流の
半波で動作することを特徴とする交流電源用ＬＥＤ集合
ランプ。5. The LED collective lamp for an AC power supply according to claim 1, wherein the rectifier circuit is not provided, and the LED collective lamp is directly connected to an input terminal of the AC power supply and operates by an AC half-wave.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11323098A JP4156072B2 (en) | 1998-04-23 | 1998-04-23 | LED collective lamp for AC power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11323098A JP4156072B2 (en) | 1998-04-23 | 1998-04-23 | LED collective lamp for AC power supply |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH11307815A true JPH11307815A (en) | 1999-11-05 |
| JP4156072B2 JP4156072B2 (en) | 2008-09-24 |
Family
ID=14606872
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11323098A Expired - Lifetime JP4156072B2 (en) | 1998-04-23 | 1998-04-23 | LED collective lamp for AC power supply |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP4156072B2 (en) |
Cited By (20)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100520721B1 (en) * | 1999-12-14 | 2005-10-11 | 가부시키가이샤 다키온 | Power supply and led lamp device |
| JP2006147933A (en) * | 2004-11-22 | 2006-06-08 | Matsushita Electric Works Ltd | Light emitting diode illuminating device |
| KR100634307B1 (en) | 2005-08-10 | 2006-10-16 | 서울옵토디바이스주식회사 | Light-emitting device and method of manufacturing the same |
| KR100716859B1 (en) | 2004-10-01 | 2007-05-09 | 마츠시타 덴끼 산교 가부시키가이샤 | Led driving semiconductor circuit and led driving apparatus including the same |
| JP2008046459A (en) * | 2006-08-18 | 2008-02-28 | Mitsubishi Electric Corp | Liquid crystal display and refrigerator |
| JP2008218150A (en) * | 2007-03-02 | 2008-09-18 | Nec Lighting Ltd | Illumination device and control circuit |
| JP2009152518A (en) * | 2007-11-30 | 2009-07-09 | Omron Corp | Light emitting diode driving device |
| JP2009200257A (en) * | 2008-02-21 | 2009-09-03 | Sharp Corp | Led drive circuit |
| JP2010003810A (en) * | 2008-06-19 | 2010-01-07 | Ae Tekku Kk | Light-emitting diode-driving circuit |
| WO2010101079A1 (en) | 2009-03-03 | 2010-09-10 | シャープ株式会社 | Light-emitting apparatus, light-emitting apparatus unit, and light-emitting apparatus production method |
| US8198834B2 (en) | 2008-08-06 | 2012-06-12 | Sharp Kabushiki Kaisha | LED drive circuit |
| JP2012244137A (en) * | 2011-05-24 | 2012-12-10 | Nichia Chem Ind Ltd | Light-emitting diode drive device |
| US8399899B2 (en) | 2009-07-01 | 2013-03-19 | Sharp Kabushiki Kaisha | Light emitting device |
| US8421094B2 (en) | 2010-01-22 | 2013-04-16 | Sharp Kabushiki Kaisha | Light emitting device |
| WO2013137410A1 (en) * | 2012-03-16 | 2013-09-19 | シチズンホールディングス株式会社 | Led drive circuit |
| JP2014507752A (en) * | 2010-12-21 | 2014-03-27 | コーニンクレッカ フィリップス エヌ ヴェ | Device and method for controlling current to a solid state lighting circuit |
| US9024334B2 (en) | 2009-11-13 | 2015-05-05 | Sharp Kabushiki Kaisha | Light-emitting device having a plurality of concentric light transmitting areas |
| US9265132B2 (en) | 2010-12-15 | 2016-02-16 | Koninklijke Philips N.V. | Linear driver for reduced perceived light flicker |
| EP2986085A4 (en) * | 2013-12-02 | 2016-12-21 | Enebrain Co Ltd | Alternating current direct drive-type led power supply capable of coping with overvoltage |
| US10292220B2 (en) | 2005-06-28 | 2019-05-14 | Seoul Viosys Co., Ltd. | Light emitting device for AC power operation |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102611328B (en) * | 2012-03-06 | 2014-09-17 | 钭惠星 | Low-power consumption isolation-free DC power supply |
-
1998
- 1998-04-23 JP JP11323098A patent/JP4156072B2/en not_active Expired - Lifetime
Cited By (35)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100520721B1 (en) * | 1999-12-14 | 2005-10-11 | 가부시키가이샤 다키온 | Power supply and led lamp device |
| KR100716859B1 (en) | 2004-10-01 | 2007-05-09 | 마츠시타 덴끼 산교 가부시키가이샤 | Led driving semiconductor circuit and led driving apparatus including the same |
| JP2006147933A (en) * | 2004-11-22 | 2006-06-08 | Matsushita Electric Works Ltd | Light emitting diode illuminating device |
| JP4581646B2 (en) * | 2004-11-22 | 2010-11-17 | パナソニック電工株式会社 | Light emitting diode lighting device |
| US10292220B2 (en) | 2005-06-28 | 2019-05-14 | Seoul Viosys Co., Ltd. | Light emitting device for AC power operation |
| KR100634307B1 (en) | 2005-08-10 | 2006-10-16 | 서울옵토디바이스주식회사 | Light-emitting device and method of manufacturing the same |
| WO2007018390A1 (en) * | 2005-08-10 | 2007-02-15 | Seoul Opto-Device Co., Ltd. | Light emitting device and method of manufacturing the same |
| US7897981B2 (en) | 2005-08-10 | 2011-03-01 | Seoul Opto Device Co., Ltd. | Light emitting device and method of manufacturing the same |
| JP2008046459A (en) * | 2006-08-18 | 2008-02-28 | Mitsubishi Electric Corp | Liquid crystal display and refrigerator |
| JP2008218150A (en) * | 2007-03-02 | 2008-09-18 | Nec Lighting Ltd | Illumination device and control circuit |
| JP2009152518A (en) * | 2007-11-30 | 2009-07-09 | Omron Corp | Light emitting diode driving device |
| JP2009200257A (en) * | 2008-02-21 | 2009-09-03 | Sharp Corp | Led drive circuit |
| JP2010003810A (en) * | 2008-06-19 | 2010-01-07 | Ae Tekku Kk | Light-emitting diode-driving circuit |
| US8198834B2 (en) | 2008-08-06 | 2012-06-12 | Sharp Kabushiki Kaisha | LED drive circuit |
| WO2010101079A1 (en) | 2009-03-03 | 2010-09-10 | シャープ株式会社 | Light-emitting apparatus, light-emitting apparatus unit, and light-emitting apparatus production method |
| US8575630B2 (en) | 2009-03-03 | 2013-11-05 | Sharp Kabushiki Kaisha | Light emitting device, light emitting device unit, and method for fabricating light emitting device |
| US8399899B2 (en) | 2009-07-01 | 2013-03-19 | Sharp Kabushiki Kaisha | Light emitting device |
| US9024334B2 (en) | 2009-11-13 | 2015-05-05 | Sharp Kabushiki Kaisha | Light-emitting device having a plurality of concentric light transmitting areas |
| US9607970B2 (en) | 2009-11-13 | 2017-03-28 | Sharp Kabushiki Kaisha | Light-emitting device having a plurality of concentric light transmitting areas |
| US9231023B2 (en) | 2009-11-13 | 2016-01-05 | Sharp Kabushiki Kaisha | Light-emitting device having a plurality of concentric light transmitting areas |
| US8421094B2 (en) | 2010-01-22 | 2013-04-16 | Sharp Kabushiki Kaisha | Light emitting device |
| US9679942B2 (en) | 2010-01-22 | 2017-06-13 | Sharp Kabushiki Kaisha | Light emitting device |
| US9093357B2 (en) | 2010-01-22 | 2015-07-28 | Sharp Kabushiki Kaisha | Light emitting device |
| US8723195B2 (en) | 2010-01-22 | 2014-05-13 | Sharp Kabushiki Kaisha | Light emitting device with plurality of LED chips and/or electrode wiring pattern |
| US9312304B2 (en) | 2010-01-22 | 2016-04-12 | Sharp Kabushiki Kaisha | LED illuminating device comprising light emitting device including LED chips on single substrate |
| US9425236B2 (en) | 2010-01-22 | 2016-08-23 | Sharp Kabushiki Kaisha | Light emitting device |
| US9966367B2 (en) | 2010-01-22 | 2018-05-08 | Sharp Kabushiki Kaisha | Light emitting device |
| US9265132B2 (en) | 2010-12-15 | 2016-02-16 | Koninklijke Philips N.V. | Linear driver for reduced perceived light flicker |
| JP2014507752A (en) * | 2010-12-21 | 2014-03-27 | コーニンクレッカ フィリップス エヌ ヴェ | Device and method for controlling current to a solid state lighting circuit |
| US9271349B2 (en) | 2010-12-21 | 2016-02-23 | Koninklijke Philips N.V. | Device and method for controlling current to solid state lighting circuit |
| JP2012244137A (en) * | 2011-05-24 | 2012-12-10 | Nichia Chem Ind Ltd | Light-emitting diode drive device |
| US9167637B2 (en) | 2012-03-16 | 2015-10-20 | Citizen Holdings Co., Ltd. | LED drive circuit |
| WO2013137410A1 (en) * | 2012-03-16 | 2013-09-19 | シチズンホールディングス株式会社 | Led drive circuit |
| JPWO2013137410A1 (en) * | 2012-03-16 | 2015-08-03 | シチズンホールディングス株式会社 | LED drive circuit |
| EP2986085A4 (en) * | 2013-12-02 | 2016-12-21 | Enebrain Co Ltd | Alternating current direct drive-type led power supply capable of coping with overvoltage |
Also Published As
| Publication number | Publication date |
|---|---|
| JP4156072B2 (en) | 2008-09-24 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP4156072B2 (en) | LED collective lamp for AC power supply | |
| US20220217825A1 (en) | Color temperature controlled and low thd led lighting devices and systems and methods of driving the same | |
| JP3188550U (en) | LED drive device with open circuit protection and adjustable color temperature and brightness | |
| JP4943402B2 (en) | LED drive circuit, LED illumination lamp, LED illumination device, and LED illumination system | |
| JP4791794B2 (en) | LED lighting attachment | |
| JP5003850B1 (en) | LED illuminator and LED illumination system | |
| US6577072B2 (en) | Power supply and LED lamp device | |
| JP2005011739A (en) | Circuit for preventing malfunction when dimming and lighting system | |
| WO2013017010A1 (en) | Brightness and color temperature adjustable led lamp | |
| US20170339765A1 (en) | Lighting system built-in intelligence | |
| US10045407B1 (en) | Dual input voltage constant power indicator | |
| JP5430716B2 (en) | Lighting device | |
| JP2012074693A (en) | Driver circuit for light-emitting component | |
| KR20170058097A (en) | Circuit for integrated controlling Light-emmiting color temperature | |
| KR20130034088A (en) | Light device | |
| CN2543317Y (en) | Drive circuit for LED lamps and lanterns | |
| KR101061417B1 (en) | LED driving circuit by pulse width modulation control method | |
| CN210351737U (en) | LED street lamp drive circuit | |
| CN113630937A (en) | Power factor switching circuit, LED lamp driving module and working method thereof | |
| US11930571B2 (en) | Solid-state lighting with a luminaire phase-dimming driver | |
| US11490476B2 (en) | Solid-state lighting with a luminaire dimming driver | |
| CN215187479U (en) | Light modulation circuit | |
| CN112702812B (en) | LED driving method and driving circuit | |
| CN217037515U (en) | Circuit for silicon controlled rectifier dimming | |
| TWI622320B (en) | Light-emitting diode lamp with automatic dimming function |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A621 | Written request for application examination |
Free format text: JAPANESE INTERMEDIATE CODE: A621 Effective date: 20050324 |
|
| RD02 | Notification of acceptance of power of attorney |
Free format text: JAPANESE INTERMEDIATE CODE: A7422 Effective date: 20050324 |
|
| RD04 | Notification of resignation of power of attorney |
Free format text: JAPANESE INTERMEDIATE CODE: A7424 Effective date: 20050324 |
|
| A977 | Report on retrieval |
Free format text: JAPANESE INTERMEDIATE CODE: A971007 Effective date: 20080204 |
|
| A131 | Notification of reasons for refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A131 Effective date: 20080318 |
|
| A521 | Written amendment |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20080430 |
|
| TRDD | Decision of grant or rejection written | ||
| A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 20080708 |
|
| A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 |
|
| A61 | First payment of annual fees (during grant procedure) |
Free format text: JAPANESE INTERMEDIATE CODE: A61 Effective date: 20080709 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20110718 Year of fee payment: 3 |
|
| R150 | Certificate of patent or registration of utility model |
Free format text: JAPANESE INTERMEDIATE CODE: R150 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20120718 Year of fee payment: 4 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20130718 Year of fee payment: 5 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| EXPY | Cancellation because of completion of term |