JPH11307815A - Collective led lamp for ac power source - Google Patents

Collective led lamp for ac power source

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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
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led
series
transistor
connected
ac power
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JP11323098A
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JP4156072B2 (en )
Inventor
Masatoshi Oishi
Toyotaro Tokimoto
昌利 大石
豊太郎 時本
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Abikkusu Kk
アビックス株式会社
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Abstract

PROBLEM TO BE SOLVED: To set a lamp to be bright, to eliminate flickering, to reduce a power loss, to miniaturize the lamp and to reduce the cost by on-driving a second transistor connected in parallel to a first transistor which is connected to the output terminal of a rectifier circuit in series with a series LED group when the output voltage of the rectifier circuit is not more than reference voltage. SOLUTION: A collective LED lamp for an AC power source contains a series LED group where many LEDs are connected in series, constant current driving circuits (Q2, R1 and R1) which constant current-drive an npn-transistor Q1 and voltage comparison switching driving circuits (Q4 and R3-R6) for switching an n-channel field-effect transistor Q3. The scrics LED group, a bypass resistor group formed of connecting bypass resistors Rb in series, the transistor Q1 and the transistor Q3 are connected in series to the output terminal of the rectifier circuit 10. The transistor Q3 becomes on when power voltage is low by the voltage comparison switching driving circuits.

Description

【発明の詳細な説明】 DETAILED DESCRIPTION OF THE INVENTION

【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。 The present invention relates to relates to an AC power source for LED aggregate lamp driven by an alternating current power source to multiple light-emitting diode (LED), and more particularly to improvements in electrical circuits in the LED aggregate 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、 BACKGROUND ART utilizing features such high luminance LED in a small / long life / low power consumption, a large number of LED as a light source,
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。 There is AC power supply for LED aggregate lamp using a household AC power source generally as a power source. 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。 LED as a light source is a semiconductor, it must be driven by a rated current value or less of the direct current. 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。 Therefore, the LED aggregate lamp case of lighting an AC power source for household, some kind of current limiting means to prevent flow or current rating for each LED needed.

【0003】その手段としては、LED集合ランプのL [0003] As the means, the LED set lamp 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。 And how to flow the following current rating even at maximum voltage by increasing the number of ED, in accordance with the number of LED and a method of providing a current limiting circuit for preventing flow over current rating.

【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。 [0004] configuration of the current limiting circuit is to use a step-down resistor. 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。 This lowers the power supply voltage by the resistor limits the current by applying a voltage after step-down between the LED terminals. 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 The LED aggregate lamp with a lighting circuit that includes a voltage dropping resistor, JP 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。 No. 8-28879, JP 62-32664, the technique is disclosed in the Patent JP-A No. 63-124479. 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。 Further, in the disclosed in Japanese Patent Laid-Open No. 7-273371 technology to step down by the large capacitance of the capacitor instead of the 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)。 [0005] The method of applying a phase portion of the voltage waveform of the AC voltage waveform by using a thyristor LED also (disclosed in Japanese Patent Laid-Open No. 6-242733). さらに、 further,
LEDに流れる電流を検知し、その電流値に従ってLE Detecting a current flowing through the LED, LE in accordance with the current value
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。 Constant current control circuit to increase or decrease the current supplied to D are also well known. 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。 As the supply voltage rises above a predetermined value, substantially constant current is made to flow 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 L as a current limiting means [0005]
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。 If you increase the number of ED, the current flowing through the LED is maximized at the peak in the AC voltage waveform. 最大電流がL Maximum current is 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。 From flowing ED is small part in the period of the AC power supply. 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。 Therefore, LED light emission luminance of the most full cycle becomes low. また、低電圧時ではL In addition, in the time of low voltage 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。 It does not light up because current hardly flows in the ED, flicker caused by the cycle of the AC power supply. したがって、LE Accordingly, LE
D集合ランプは暗くてちらつき多い照明器具となる。 D set lamp will be many lighting fixture flickering dark.

【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。 [0007] In the current limiting means by the voltage drop across resistor, and a large current flows to the resistor. 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。 Therefore, it does not Ikase features LED low power consumption, implementation many problems resistor to heat generation. 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。 If Hodokose heat dissipation measures to avoid this, the lamp size of the difficult. また、コストも増加させる。 In addition, the cost also increases. 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。 Indeed, if the step-down by the capacitor, the heat generation is small small compared to the resistance. 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。 However, because it requires a large-capacity capacitor, lamp increase in the size of the can not be avoided.

【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。 [0008] If the flow only when the phase current corresponding to the low voltage portion of the waveform of the power source voltage, the LED will flow discretely current according to the periodicity of the AC waveform. そのため、 for that reason,
フリッカーが生じる。 Flicker occurs. また、周期のほとんどの部分でL In addition, L for the most part of the cycle
EDが点灯しないことになり、照明も暗くなってしまう。 It will be ED does not light, become darker lighting. 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。 Therefore, it is difficult to say that by effectively utilizing the LED advantage is a high luminance.

【0009】定電流制御回路を用いる場合でも問題が多い。 [0009] is often a problem even in the case of using a constant-current control circuit. その一例を図4に示した。 An example is shown in FIG. 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。 Figure 4A, B is a characteristic diagram showing the difference by the number of LED connected in series relationship between the power supply voltage and the light emission drive current. 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。 A is a case where the number of LED to be connected in series is small, applied it voltage is low, the constant current control is performed for the most part of the AC power supply period. 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。 Therefore, most power loss of greater that amount during the constant current control and converted into heat. 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。 Thus the same problem as the case of using the high-voltage resistor occurs. また、B In addition, 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。 When the number of LED is large, as shown in, the power loss is less since the constant current control is performed by the high-voltage unit. 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。 However, only flows following current rating in LED in many parts of the cycle. したがって、暗くてちらつく照明となる。 Therefore, the dark and flicker illumination.

【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。 [0010] The present invention is directed to bright without flicker, moreover aims to provide an AC power supply LED aggregate lamp can achieve miniaturization and cost reduction less power loss.

【0011】 [0011]

【課題を解決するための手段】本発明の交流電源用LE Means for Solving the Problems] LE AC power source of the present invention
D集合ランプは、多数のLEDを直列接続した直列LE D set lamp series LE which a large number of LED are connected in series
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。 D and group, and a first transistor connected in series with series LED group to the output terminal of the rectifier circuit, a constant current driving circuit for constant current driving the first transistor, the second is connected in parallel with the first transistor and includes a second transistor and a voltage comparator switching drive circuit output voltage of the rectifier circuit to the second transistor on driving when the reference voltage or less. 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。 Also, with replacing the first transistor in the constant current element, it may be omitted the constant current drive circuit.

【0012】より好ましくは、前記直列LED群の各L [0012] More preferably, each L of the series LED group
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。 Each ED is to connect a bypass resistor in parallel. 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。 Further, a configuration in which the series LED group are multiple, the output ends of the rectifier circuit the plurality of series LED groups connected in parallel, a first transistor or a constant current element, and it is connected to the 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。 Furthermore, without providing the rectifying circuit may be operating in half-wave of the AC is directly connected to the input end of the AC power supply.

【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。 Figure 1 DETAILED DESCRIPTION OF THE INVENTION shows the external view of an AC power source for LED aggregate lamp in the embodiment of the present invention (LED lamp). 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 Numerous LE in the case 2 provided with a base part 1 for connecting to an AC power source connected to the bulb socket
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。 Series LED group formed by connecting the D series and its lighting circuit is accommodated. 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。 Light from the series LED group as a light source is irradiated through the light transmitting window 3 of the case to the case 2 outside. 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。 Of course, the form of the LED lamp is not limited to this, and a lighting apparatus body and the power connections may be separated through the power cord. 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。 In this case, the power connection or a mouthpiece for rosette may be or the 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。 [0015] Figure 2 shows an outline of the circuit configuration of the LED lamp in the present embodiment. 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 A rectifier circuit 10 that the AC power source AC a diode bridge for full-wave rectification, a series LED group multiple LED connected in series, and the bypass resistor Rb connected in parallel to each LED, the npn transistor Q1, the transistor Q1 the constant current driving circuit for constant current drive (Q2, R1, R2), and n-channel field-effect transistors Q3, the transistor 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。 Voltage comparator switching drive circuit (Q4, R3 to R6) for switching is configured to include a.

【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。 [0016] and the bypass resistor group formed by serially connecting a series LED group and the bypass resistor Rb to the output ends of the rectifier circuit 10, a transistor Q1, and the transistor Q3 connected in parallel to the transistor Q1 is connected in series there. 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 Each bypass resistor Rb is adjacent via the bypass resistor Rb when parallel connected LED is broken 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。 By applying a current to the ED it is used to prevent the LED lamp is turned off. 以下、この回路の動作を説明する。 Hereinafter, the operation of this circuit.

【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。 [0017] When the transistor Q3 is turned off, as described below, the current light emission driving series LED group, flows transistor Q1 to the constant current driving circuit side. 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。 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。 The transistor Q3 is a voltage comparator switching drive circuit (hereinafter, switching drive circuit) is turned on when the power supply voltage by the low voltage. 分圧抵抗R Dividing resistors 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。 3, R4 generates a potential in accordance with the full-wave rectified power supply voltage dividing point b. 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。 n-channel field effect switching driver circuit transistor Q4 and the potential of the voltage dividing point b is turned on when the predetermined value or less. 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。 Thus, approximately 0v becomes (the gate potential of Q3) the source potential of the transistors Q4, the transistor Q3 is turned on. 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。 Power supply voltage increases in accordance with the cycle, the potential dividing point b is the transistor Q4 is turned off exceeds a predetermined value. 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。 At this time, the potential of the voltage dividing resistors R5, R6 by dividing point c because it has set the resistance value to be 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。 [0019] When transistor Q3 is turned off, current flows through the transistor Q1 and the constant current driving circuit side. さらに、定電流駆動回路側へ分流した電流は抵抗R Furthermore, the current diverted to the constant current drive circuit side resistor R
2を通ってトランジスタQ1のベースに流れ込む。 Through the 2 flows into the base of the transistor Q1. 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 the base current Ib1 increases with an increase in the supply voltage, the collector current emitter current Ie1 increases (current flowing through the LED) Ic1 is increased.

【0020】npnトランジスタQ2のゲート電極は、 [0020] The gate electrode of the npn transistor Q2,
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。 Emitter current is connected to the voltage drop detection point a when flowing through the current detection resistor R1. 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。 Transistor Q2 passes a collector current Ic2 corresponding to the potential of the point a, decreases the base current Ib1 of the transistor Q1. その結果、トランジスタQ1のエミッタ電流Ie1が減少し、 As a result, the emitter current Ie1 of the transistor Q1 is reduced,
コレクタ電流Ic1が減少する。 The collector current Ic1 is reduced. 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。 Therefore, the collector current Ic1 of the transistor Q1 is controlled 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。 [0021] Figure 3A, showing the change in the current flowing through the circuit in accordance with the displacement of the power supply voltage B. 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。 A is a case where the series LED groups only by a constant current circuit was driven to emit light. 低電圧時では電流があまり流れていないことがわかる。 In the low-voltage electric current it can be seen that not much flow. 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。 B is the case where the light emission driving series LED group by the circuit configuration of the present embodiment. 低電圧時にも確実に電流が流れていることがわかる。 It can be seen that surely current flows 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。 [0022] As the modification of the lighting circuit, the transistor Q1 as well as replacing the constant current element, such as a constant-current diode, the circuit configuration is omitted constant current driving circuit is considered. 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。 The rectifier circuit is not necessarily required, may be connected to an AC power source as the circuit of the present 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、 Furthermore, a case of obtaining a white light, a series LED group provided for each LED of the three primary colors with different characteristics (RGB),
それぞれの直列LED群を並列接続すれば、各直列LE By parallel connecting the respective series LED groups, each of the series 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。 All colors of the LED drive circuit one at by adjusting the number of group D of the LED can be efficiently illuminated.

【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 [Effect of the Invention] at low voltage more current by a second transistor which is turned on by the voltage comparator switching drive circuit, a constant current in series LE by the first transistor at the time of a high voltage driven by a constant-current driver
D群の各LEDに流れる。 It flows through each LED of the D groups. 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。 Therefore, bright flicker without, moreover it is possible to achieve an AC power source for LED aggregate lamp less power loss can achieve miniaturization 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。 [0025] can be a constant current driving circuit by replacing the first transistor in the constant current device can be simplified is omitted ,, circuitry to achieve the size and weight of the low cost and the LED aggregate lamp.

【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 paralleling bypass resistor to each LED in series LED group, LED aggregate lamp even if there LED is broken is never 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。 [0027] By connecting a plurality of series LED groups in parallel, it is possible to adjust so that the current flowing in each series LED group is constant, respectively efficiently emit LED series LED groups in 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、 [0028] By omitting the rectifier circuit, to simplify the circuit,
さらなるコストダウンと小型化を達成できる。 It can achieve further cost reduction and downsizing.

【図面の簡単な説明】 BRIEF DESCRIPTION OF THE DRAWINGS

【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。 1 is an external view of an AC driving LED aggregate lamp in the embodiment of the present invention.

【図2】上記LED集合ランプの回路構成図である。 2 is a circuit diagram of the LED aggregate lamp.

【図3】上記回路に流れる電流波形の概略図である。 Figure 3 is a schematic diagram of a current waveform flowing through the circuit. 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。 Is a waveform of the constant current controlled current, 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。 Figure 4 is a schematic diagram of a current characteristic when the light emission drive the LED by the constant current control circuit in a conventional LED aggregate lamp. 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。 A is a case where the number of LED is small, B respectively correspond to the LED set lamp in a case where the number of LED is large.

【符号の説明】 DESCRIPTION OF SYMBOLS

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)

    【特許請求の範囲】 [The claims]
  1. 【請求項1】 交流電源を全波整流する整流回路と、多数の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。 And 1. A rectifier circuit an AC power supply to full-wave rectification, a series LED group multiple LED connected in series, a first transistor connected in series LED group series with the output end of the rectifier circuit, the 1 transistor and the constant current driving circuit for constant current driving, and the second transistor connected in parallel with the first transistor, the voltage comparison output voltage of the rectifier circuit is turned drives the second transistor when the reference voltage or less AC power LED aggregate lamp is characterized in that a switching drive circuit.
  2. 【請求項2】 請求項1において、前記第1トランジス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. A method according to claim 1, wherein the first transistor as well as replacing the constant current element, the alternating current power supply for LED aggregate lamp, characterized by omitting the constant current driving circuit.
  3. 【請求項3】 請求項1または2において、前記直列L 3. An apparatus according to claim 1 or 2, wherein the series L
    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。 AC Power LED aggregate lamp respectively bypass resistor to each LED in the ED group, characterized in that connected in parallel.
  4. 【請求項4】 請求項1〜3のいずれかにおいて、前記直列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 claim 1, there are a plurality the series LED group, the output ends of the rectifier circuit the plurality of series LED groups connected in parallel, a first transistor or a constant current element, AC power LED aggregate lamp, characterized in that it is connected to the second transistor.
  5. 【請求項5】 請求項1〜4のいずれかにおいて、前記整流回路を設けず、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. A claim 1, wherein the rectifier circuit is not provided, the AC power supply LED aggregate lamp, characterized by operating at half-wave of the direct to alternating current to the input end of the AC power supply.
JP11323098A 1998-04-23 1998-04-23 AC power supply for led set lamp Expired - Lifetime JP4156072B2 (en)

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