JP2002231471A - Led lighting device and lighting system - Google Patents
Led lighting device and lighting systemInfo
- Publication number
- JP2002231471A JP2002231471A JP2001023800A JP2001023800A JP2002231471A JP 2002231471 A JP2002231471 A JP 2002231471A JP 2001023800 A JP2001023800 A JP 2001023800A JP 2001023800 A JP2001023800 A JP 2001023800A JP 2002231471 A JP2002231471 A JP 2002231471A
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- voltage
- lighting device
- dimming
- signal
- 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.)
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Links
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】この発明は、ＬＥＤ点灯装置
及びこのＬＥＤ点灯装置を備えた照明装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an LED lighting device and a lighting device provided with the LED lighting device.
【０００２】[0002]
【従来の技術】ＬＥＤを発光素子とした照明用光源装置
が、例えば特開平11-135274号公報に開示されている。2. Description of the Related Art An illumination light source device using an LED as a light emitting element is disclosed, for example, in Japanese Patent Application Laid-Open No. 11-135274.
【０００３】[0003]
【発明が解決しようとする課題】ＬＥＤを複数個直列に
接続して照明として用いる場合に、商用交流を整流後昇
圧する昇圧チョッパ回路を使用したＬＥＤ点灯装置を用
いることを、本発明者らは提案している（特願2000-130
605号）。このようなＬＥＤ点灯装置を用いて照明を行
う場合に、調光機能を設けることについては充分に考慮
されていなかった。SUMMARY OF THE INVENTION In the case where a plurality of LEDs are connected in series and used as illumination, the present inventors have proposed using an LED lighting device using a boost chopper circuit for rectifying and boosting a commercial AC. Proposed (Japanese Patent Application 2000-130)
605). When lighting is performed using such an LED lighting device, the provision of a dimming function has not been sufficiently considered.
【０００４】これに対し、前記特開平11-135274号公報
には、ＬＥＤ照明装置の調光制御を可能とする技術が開
示されている。On the other hand, Japanese Patent Application Laid-Open No. 11-135274 discloses a technique which enables dimming control of an LED lighting device.
【０００５】しかしながら、この調光制御方式は、複数
のＬＥＤの一部を消灯させるものであるため、連続的な
調光制御を行うことはできないという不具合があった。However, this dimming control system has a disadvantage that continuous dimming control cannot be performed because a part of the plurality of LEDs is turned off.
【０００６】この発明の目的は、ＬＥＤ点灯装置に調光
器などの操作を行ってＬＥＤを連続的に調光することを
可能にすることである。An object of the present invention is to make it possible to continuously dimming an LED by operating a dimmer or the like on an LED lighting device.
【０００７】この発明の目的は、このような調光を簡易
な回路構成で行えるようにすることである。An object of the present invention is to enable such dimming with a simple circuit configuration.
【０００８】この発明の目的は、前記のような調光が可
能なＬＥＤ点灯装置を備えた照明装置を提供することで
ある。An object of the present invention is to provide a lighting device including an LED lighting device capable of dimming as described above.
【０００９】この発明の目的は、この照明装置で複数個
のＬＥＤを直列接続したＬＥＤ群を点灯できるようにす
ることである。An object of the present invention is to enable an LED group in which a plurality of LEDs are connected in series to be lit by the lighting device.
【００１０】[0010]
【課題を解決するための手段】請求項１に記載の発明
は、電源の出力を昇圧して照明に供給する昇圧チョッパ
回路と；この昇圧チョッパ回路の出力により点灯するＬ
ＥＤと；このＬＥＤの電流又は電圧を検出する検出回路
と；デューティ比により調光の程度を指示する調光信号
を前記デューティ比に応じたレベルの電圧信号に変換す
る調光回路と；この変換後の電圧信号に応じた電圧と前
記検出回路の検出信号に応じた電圧との和が一定となる
ように前記昇圧チョッパ回路を制御する制御回路と；を
備えているＬＥＤ点灯装置である。According to a first aspect of the present invention, there is provided a boost chopper circuit for boosting the output of a power supply and supplying the boosted chopper circuit with lighting;
An ED; a detection circuit for detecting a current or a voltage of the LED; a dimming circuit for converting a dimming signal indicating a degree of dimming by a duty ratio into a voltage signal having a level corresponding to the duty ratio; A control circuit for controlling the boost chopper circuit so that a sum of a voltage corresponding to a voltage signal later and a voltage corresponding to a detection signal of the detection circuit is constant.
【００１１】したがって、調光回路で調光信号を変換し
て、その調光信号のデューティ比に応じた電圧と電源の
出力電流に応じた電圧との和が一定となるように制御す
ることができるので、デューティ比により調光の程度を
指示する調光信号を出力する汎用の調光器などを用いて
も、ＬＥＤなどの照明の調光が可能となる。Therefore, the dimming signal is converted by the dimming circuit, and control is performed so that the sum of the voltage corresponding to the duty ratio of the dimming signal and the voltage corresponding to the output current of the power supply becomes constant. Therefore, even if a general-purpose dimmer that outputs a dimming signal indicating the degree of dimming based on the duty ratio is used, dimming of illumination such as an LED can be performed.
【００１２】なお、調光信号は汎用の調光器のほか、赤
外線などを用いた無線通信で調光信号を送信するリモコ
ンにより供給するようにすることもできる。The dimming signal can be supplied by a general-purpose dimmer or a remote controller that transmits the dimming signal by wireless communication using infrared rays or the like.
【００１３】請求項２に記載の発明は、請求項１に記載
のＬＥＤ点灯装置において、前記調光回路は、前記調光
信号を整流、平滑化する整流・平滑回路、及び、この整
流、平滑化後の電圧の大きさを調整する電圧変換回路を
備えている。According to a second aspect of the present invention, in the LED lighting device according to the first aspect, the dimming circuit rectifies and smoothes the dimming signal, and the rectifying and smoothing circuit. A voltage conversion circuit for adjusting the magnitude of the voltage after the conversion.
【００１４】したがって、調光回路を整流・平滑回路及
び電圧変換回路からなる比較的簡易な回路構成にして、
調光を行うことが可能となる。Therefore, the dimming circuit has a relatively simple circuit configuration including a rectifying / smoothing circuit and a voltage converting circuit.
Dimming can be performed.
【００１５】請求項３に記載の発明は、照明器具本体
と；請求項１又は２に記載のＬＥＤ点灯装置と；を備え
ている照明装置である。According to a third aspect of the present invention, there is provided a lighting device comprising: a lighting fixture main body; and the LED lighting device according to the first or second aspect.
【００１６】したがって、ＬＥＤの調光が可能な照明装
置を提供することができる。Therefore, it is possible to provide a lighting device capable of dimming an LED.
【００１７】請求項４に記載の発明は、請求項３に記載
の照明装置において、複数個のＬＥＤが直列に接続され
てなり、前記ＬＥＤ点灯装置から電力の供給を受けて点
灯するＬＥＤ群を備えている。According to a fourth aspect of the present invention, in the lighting device according to the third aspect, a plurality of LEDs are connected in series, and a group of LEDs that are lit by receiving power supply from the LED lighting device is provided. Have.
【００１８】したがって、複数個のＬＥＤを直列に接続
したＬＥＤ群を用い、その調光が可能な照明装置を提供
することができる。Therefore, it is possible to provide a lighting device capable of dimming the light by using an LED group in which a plurality of LEDs are connected in series.
【００１９】[0019]
【発明の実施の形態】この発明の一実施の形態について
説明する。DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described.
【００２０】図１は、本実施の形態のＬＥＤ点灯装置の
回路図である。図１に示すように、このＬＥＤ点灯装置
１は、商用交流電源２に接続されたフィルタ３を備えて
いる。このフィルタ３は、後述する昇圧チョッパ回路１
０の高周波スイッチング動作によって発生した高周波が
商用交流電源２に流出しないように阻止する。FIG. 1 is a circuit diagram of an LED lighting device according to the present embodiment. As shown in FIG. 1, the LED lighting device 1 includes a filter 3 connected to a commercial AC power supply 2. The filter 3 includes a boost chopper circuit 1 described later.
The high frequency generated by the high frequency switching operation of 0 is prevented from flowing out to the commercial AC power supply 2.
【００２１】インダクタを用いた電流検出回路Ｌ２は、
後述するインダクタＬ１に磁気結合した検出巻線からな
り、その出力は、後述する制御回路１１に制御入力す
る。The current detection circuit L2 using an inductor is:
It consists of a detection winding magnetically coupled to an inductor L1 described below, and its output is control-input to a control circuit 11 described later.
【００２２】全波整流回路４は、フィルタ３の出力を全
波整流する。The full-wave rectifier circuit 4 performs full-wave rectification on the output of the filter 3.
【００２３】電圧検出回路５は、全波整流回路４が出力
する電源電圧を検出する。The voltage detection circuit 5 detects a power supply voltage output from the full-wave rectification circuit 4.
【００２４】電流検出回路６は、検出回路を実現するも
のであり、複数のＬＥＤ７，７，…を直列に接続してな
る負荷であるＬＥＤ群８の電流を検出する。この電流検
出回路６の出力電圧は差動増幅器からなる検出回路１５
で基準電圧Ｅと比較され、その出力は後述する乗算器１
４に入力される。The current detection circuit 6 realizes a detection circuit, and detects a current of an LED group 8 which is a load formed by connecting a plurality of LEDs 7, 7,... In series. The output voltage of the current detection circuit 6 is a detection circuit 15 comprising a differential amplifier.
Is compared with a reference voltage E, and the output is compared with a multiplier 1 described later.
4 is input.
【００２５】電流検出回路９は、後述するスイッチング
素子Ｑのスイッチングにより流れる電流を検出する。な
お、電流検出回路９は、トランス等の巻線検出手段のほ
か、抵抗を介して電流を検出する構成としてもよい。The current detecting circuit 9 detects a current flowing by switching of a switching element Q described later. Note that the current detection circuit 9 may be configured to detect current via a resistor in addition to winding detection means such as a transformer.
【００２６】昇圧チョッパ回路１０は、インダクタＬ
１、スイッチング素子Ｑ、ダイオードＤ及びコンデンサ
Ｃなどから構成され、全波整流回路４が出力する非平滑
化直流を昇圧する。この昇圧チョッパ回路１０の出力
は、ＬＥＤ群８に供給される。昇圧チョッパ回路１０に
おいて、インダクタＬ１は、全波整流回路４の直流出力
端間にスイッチング素子Ｑと直列に接続されている。ス
イッチング素子Ｑは、ＭＯＳＦＥＴなどを用いる。ダイ
オードＤは、並列に接続されているコンデンサＣ及びＬ
ＥＤ群８と直列に接続されていて、スイッチング素子Ｑ
とは並列的に接続されている。The boost chopper circuit 10 includes an inductor L
1, comprising a switching element Q, a diode D, a capacitor C, etc., and boosts the non-smoothed DC output from the full-wave rectifier circuit 4. The output of the boost chopper circuit 10 is supplied to the LED group 8. In the boost chopper circuit 10, the inductor L1 is connected in series with the switching element Q between the DC output terminals of the full-wave rectifier circuit 4. As the switching element Q, a MOSFET or the like is used. Diode D includes capacitors C and L connected in parallel.
The switching element Q is connected in series with the ED group 8.
And are connected in parallel.
【００２７】制御回路１１は、ドライブ信号発生回路１
２、スイッチング制御回路１３及び乗算器１４からな
る。ドライブ信号発生回路１２は、スイッチング素子Ｑ
をＯＮ、ＯＦＦするドライブ信号を発生する。乗算器１
４は、電圧検出回路５から得られる電源電圧と電流検出
回路６の出力信号とを乗算して、その乗算信号をスイッ
チング制御回路１３に出力する。スイッチング制御回路
１３は、ドライブ信号発生回路１２の駆動を制御する。
すなわち電流検出回路９及び乗算器１４からそれぞれ出
力された信号を比較して、その比較の結果に基づいてド
ライブ信号発生回路１２に出力する制御信号のデューテ
ィ比を調節するＰＷＭ制御を行う。これにより、ＬＥＤ
群８に流れる電流が一定となるようにフィードバック制
御される。また、制御回路１１は、昇圧チョッパ回路１
０を電流臨界モードで動作させ、昇圧チョッパ回路１０
を高調波を低減するアクティブフィルタとして動作す
る。The control circuit 11 includes a drive signal generation circuit 1
2. It comprises a switching control circuit 13 and a multiplier 14. The drive signal generation circuit 12 includes a switching element Q
Generates a drive signal for turning ON and OFF. Multiplier 1
4 multiplies the power supply voltage obtained from the voltage detection circuit 5 by the output signal of the current detection circuit 6 and outputs the multiplied signal to the switching control circuit 13. The switching control circuit 13 controls driving of the drive signal generation circuit 12.
That is, PWM control for comparing the signals output from the current detection circuit 9 and the multiplier 14 and adjusting the duty ratio of the control signal output to the drive signal generation circuit 12 based on the result of the comparison is performed. By this, LED
Feedback control is performed so that the current flowing through the group 8 becomes constant. Further, the control circuit 11 includes the boost chopper circuit 1
0 in the current critical mode, and the boost chopper circuit 10
Operate as an active filter for reducing harmonics.
【００２８】ところで、調光器１６は、このＬＥＤ点灯
装置１にＬＥＤ群８の調光を行うための調光信号を出力
するものである。この調光信号は方形波であり、そのデ
ューティ比の大きさにより調光の程度を指示するもので
ある。Incidentally, the dimmer 16 outputs a dimming signal for dimming the LED group 8 to the LED lighting device 1. This dimming signal is a square wave, and indicates the degree of dimming according to the magnitude of the duty ratio.
【００２９】この調光器１６が発する調光信号は、入力
端子２１を介して制御回路１１の調光回路１７に入力さ
れる。この調光回路１７に入力された調光信号は、整流
・平滑回路１８で整流、平滑される。これにより、整
流、平滑後の調光信号は、その直流電圧のレベルにより
調光の程度を示すこととなる。この整流、平滑後の調光
信号は、電圧変換回路１９により、その大きさが調整さ
れる。この場合に、整流・平滑回路１８側と電圧変換回
路１９側とは、絶縁回路２０を介して絶縁される。The dimming signal generated by the dimmer 16 is input to the dimming circuit 17 of the control circuit 11 via the input terminal 21. The dimming signal input to the dimming circuit 17 is rectified and smoothed by a rectifying / smoothing circuit 18. As a result, the dimming signal after rectification and smoothing indicates the degree of dimming by the level of the DC voltage. The magnitude of the rectified and smoothed dimming signal is adjusted by the voltage conversion circuit 19. In this case, the rectifying / smoothing circuit 18 side and the voltage conversion circuit 19 side are insulated through the insulating circuit 20.
【００３０】前記のとおり、電流検出回路６の出力電圧
信号は、抵抗Ｒ１を介して検出回路１５の反転入力端子
に入力される。このとき、電圧変換回路１９の出力電圧
信号が抵抗Ｒ２を介して電流検出回路６の出力電圧信号
に加算され、その加算信号が検出回路１５の反転入力端
子に入力される。As described above, the output voltage signal of the current detection circuit 6 is input to the inverting input terminal of the detection circuit 15 via the resistor R1. At this time, the output voltage signal of the voltage conversion circuit 19 is added to the output voltage signal of the current detection circuit 6 via the resistor R2, and the added signal is input to the inverting input terminal of the detection circuit 15.
【００３１】以上説明した照明装置によれば、ＬＥＤ群
８の電流の大きさに応じた電圧信号と、汎用の調光器１
６が出力する調光信号に応じた電圧信号との和を、乗算
器１４によりＬＥＤ点灯装置１の電源電圧の検出電圧信
号に乗算し、スイッチング制御回路１３では、その出力
と電流検出回路９の出力を比較して、ＬＥＤ群８に流れ
る電流が一定となるようにフィードバック制御する。According to the illumination device described above, the voltage signal corresponding to the magnitude of the current of the LED group 8 and the general-purpose dimmer 1
6 multiplies the sum of the voltage signal corresponding to the dimming signal output by the multiplier 14 and the detected voltage signal of the power supply voltage of the LED lighting device 1 by the multiplier 14. The outputs are compared, and feedback control is performed so that the current flowing through the LED group 8 becomes constant.
【００３２】これにより、調光回路１７で調光信号を変
換して、ＬＥＤ群８の電流の大きさに応じた電圧信号
と、汎用の調光器１６が出力する調光信号に応じた電圧
信号との和が一定となるように昇圧チョッパ回路１０を
制御することができるので、汎用の調光器１６を用い
て、ＬＥＤ群８を点灯する際の調光を行うことができ
る。As a result, the dimming signal is converted by the dimming circuit 17, and a voltage signal corresponding to the magnitude of the current of the LED group 8 and a voltage signal corresponding to the dimming signal output from the general-purpose dimmer 16. Since the boost chopper circuit 10 can be controlled so that the sum of the signal and the signal becomes constant, it is possible to use the general-purpose dimmer 16 to perform dimming when the LED group 8 is turned on.
【００３３】しかも、調光回路１７を整流・平滑回路１
８及び電圧変換回路１９からなる比較的簡易な回路構成
にして、調光を行うことが可能となる。Moreover, the dimming circuit 17 is replaced with the rectifying / smoothing circuit 1
The dimming can be performed with a relatively simple circuit configuration including the voltage conversion circuit 8 and the voltage conversion circuit 19.
【００３４】なお、本実施の形態の照明装置は、高圧放
電ランプを用いて照明する照明装置と併設されるもので
あってもよく、調光器１６は、この高圧放電ランプを用
いた照明装置の調光操作を行う調光器と兼用する構成と
してもよい。The lighting device according to the present embodiment may be provided together with a lighting device that illuminates using a high-pressure discharge lamp, and the dimmer 16 is a lighting device using the high-pressure discharge lamp. It may be configured to also be used as a dimmer for performing the dimming operation described above.
【００３５】[0035]
【発明の効果】請求項１に記載の発明は、調光回路で調
光信号を変換して、その調光信号のデューティ比に応じ
た電圧と電源の出力電流に応じた電圧との和が一定とな
るように制御することができるので、デューティ比によ
り調光の程度を指示する調光信号を出力する汎用の調光
器などを用いても、ＬＥＤなどの照明の調光が可能とな
る。According to the first aspect of the present invention, the dimming signal is converted by the dimming circuit, and the sum of the voltage according to the duty ratio of the dimming signal and the voltage according to the output current of the power supply is calculated. Since it can be controlled to be constant, the dimming of illumination such as an LED can be performed using a general-purpose dimmer that outputs a dimming signal indicating the degree of dimming according to the duty ratio. .
【００３６】請求項２に記載の発明は、請求項１に記載
のＬＥＤ点灯装置において、調光回路を整流・平滑回路
及び電圧変換回路からなる比較的簡易な回路構成にし
て、調光を行うことが可能となる。According to a second aspect of the present invention, in the LED lighting device according to the first aspect, the dimming circuit has a relatively simple circuit configuration including a rectifying / smoothing circuit and a voltage conversion circuit to perform dimming. It becomes possible.
【００３７】請求項３に記載の発明は、ＬＥＤの調光が
可能な照明装置を提供することができる。According to the third aspect of the present invention, it is possible to provide a lighting device capable of dimming an LED.
【００３８】請求項４に記載の発明は、請求項３に記載
の照明装置において、複数個のＬＥＤを直列に接続した
ＬＥＤ群を用い、その調光が可能な照明装置を提供する
ことができる。According to a fourth aspect of the present invention, in the lighting device of the third aspect, it is possible to provide a lighting device capable of dimming the light by using an LED group in which a plurality of LEDs are connected in series. .
【図１】この発明の一実施の形態である照明装置に用い
るＬＥＤ点灯装置の回路図である。FIG. 1 is a circuit diagram of an LED lighting device used for a lighting device according to an embodiment of the present invention.
１ ＬＥＤ点灯装置 ６ 検出回路 ７ ＬＥＤ ８ ＬＥＤ群 １０ 昇圧チョッパ回路 １７ 調光回路 １８ 整流・平滑回路 １９ 電圧変換回路 REFERENCE SIGNS LIST 1 LED lighting device 6 detection circuit 7 LED 8 LED group 10 boost chopper circuit 17 dimming circuit 18 rectifying / smoothing circuit 19 voltage conversion circuit
Claims (4)
圧チョッパ回路と；この昇圧チョッパ回路の出力により
点灯するＬＥＤと；このＬＥＤの電流又は電圧を検出す
る検出回路と；デューティ比により調光の程度を指示す
る調光信号を前記デューティ比に応じたレベルの電圧信
号に変換する調光回路と；この変換後の電圧信号に応じ
た電圧と前記検出回路の検出信号に応じた電圧との和が
一定となるように前記昇圧チョッパ回路を制御する制御
回路と；を備えているＬＥＤ点灯装置。1. A boost chopper circuit for boosting an output of a power supply and supplying the boosted chopper circuit with lighting; an LED turned on by an output of the boost chopper circuit; a detection circuit for detecting a current or a voltage of the LED; A dimming circuit for converting a dimming signal indicating a degree of light into a voltage signal having a level corresponding to the duty ratio; a voltage corresponding to the converted voltage signal and a voltage corresponding to a detection signal of the detection circuit; And a control circuit for controlling the step-up chopper circuit so that the sum of the two becomes constant.
平滑化する整流・平滑回路、及び、この整流、平滑化後
の電圧の大きさを調整する電圧変換回路を備えている請
求項１に記載のＬＥＤ点灯装置。2. The dimming circuit rectifies the dimming signal,
The LED lighting device according to claim 1, further comprising a rectifying / smoothing circuit for smoothing, and a voltage conversion circuit for adjusting the magnitude of the voltage after the rectification and smoothing.
のＬＥＤ点灯装置と；を備えている照明装置。3. A lighting device comprising: a lighting device main body; and the LED lighting device according to claim 1 or 2.
続されてなり、前記ＬＥＤ点灯装置から電力の供給を受
けて点灯するＬＥＤ群である請求項３に記載の照明装
置。4. The lighting device according to claim 3, wherein the lighting is a group of LEDs in which a plurality of LEDs are connected in series and which is turned on by receiving power supply from the LED lighting device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001023800A JP2002231471A (en) | 2001-01-31 | 2001-01-31 | Led lighting device and lighting system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001023800A JP2002231471A (en) | 2001-01-31 | 2001-01-31 | Led lighting device and lighting system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2002231471A true JP2002231471A (en) | 2002-08-16 |
Family
ID=18889042
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2001023800A Pending JP2002231471A (en) | 2001-01-31 | 2001-01-31 | Led lighting device and lighting system |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2002231471A (en) |
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