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JP2012221772A - Luminaire - Google Patents

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JP2012221772A
JP2012221772A JP2011086971A JP2011086971A JP2012221772A JP 2012221772 A JP2012221772 A JP 2012221772A JP 2011086971 A JP2011086971 A JP 2011086971A JP 2011086971 A JP2011086971 A JP 2011086971A JP 2012221772 A JP2012221772 A JP 2012221772A
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power supply
leds
led
turned
lighting device
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JP5746898B2 (en
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Yasunori Yashiro
康則 家城
Noriaki Okuda
典明 奥田
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Mitsubishi Electric Corp
Mitsubishi Electric Lighting Corp
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Mitsubishi Electric Corp
Mitsubishi Electric Lighting Corp
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
    • Y02B20/40—Control techniques providing energy savings, e.g. smart controller or presence detection

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Abstract

PROBLEM TO BE SOLVED: To light some of multiple LEDs for a predetermined time by utilizing existing capacitors after an external power supply is turned off.SOLUTION: When an AC power supply 17 is turned on, a lighting circuit 13 charges an electrolytic capacitor 33 connected in parallel with an LED module 35, and outputs a current being smoothed by the electrolytic capacitor 33 to the LED module 35. When the AC power supply 17 is turned off, the lighting circuit 13 outputs the current that has charged the electrolytic capacitor 33 to the LED module 35 before stopping output of the current. When the fact that the AC power supply 17 has been turned off is detected by an AC power supply detection circuit 14, a delay controller 36 controls the output current from the lighting circuit 13 to flow into two LEDs out of five LEDs mounted on the LED module 35.

Description

本発明は、照明装置に関するものである。本発明は、特に、ＬＥＤ照明装置に関するものである。   The present invention relates to a lighting device. The present invention particularly relates to an LED lighting device.

消灯することで、部屋が真っ暗になり使用者の安全を確保できないため、リモコンで操作可能な照明装置を、リモコンにより消灯させた場合に限り所定時間点灯させる遅延消灯の技術がある。一方、照明装置を壁スイッチにより消灯させた場合や停電が発生した場合は、突然真っ暗になり使用者の安全が確保されず危険な状態になる恐れがある。   By turning off the lights, the room becomes completely dark and the safety of the user cannot be ensured. Therefore, there is a delayed turn-off technique in which a lighting device that can be operated with a remote control is turned on for a predetermined time only when turned off with the remote control. On the other hand, when the lighting device is turned off by a wall switch or when a power failure occurs, the lighting device suddenly becomes dark and there is a risk that the safety of the user is not ensured and a dangerous state is brought about.

このため、電源遮断時においても一定時間は照明装置の点灯を継続する技術がある（例えば、特許文献１参照）。   For this reason, there is a technique for continuing lighting of the lighting device for a certain time even when the power is shut off (see, for example, Patent Document 1).

特開２００９−２４５６３８号公報JP 2009-245638 A

特許文献１では、補助電源部を用いており、商用電源が供給されている間に、負荷であるＬＥＤとは別に補助電源部を充電するように照明装置が構成されている。   In Patent Literature 1, an auxiliary power supply unit is used, and the lighting device is configured to charge the auxiliary power supply unit separately from the LED as a load while commercial power is supplied.

このため、ある期間（補助電源部のコンデンサが充電されるまで）は、負荷であるＬＥＤへの電力供給以外に補助電源部への電力供給が必要となるという課題があった。また、補助電源部には、外部電源（ＡＣ（交流）電源等）が途絶えた後にＬＥＤを遅延消灯させるために、蓄えられた電力を可変抵抗やＰＷＭ（パルス幅変調）制御により、徐々に消費する工夫がされているが、そのための専用回路が大きくなり、照明装置が高価になるという課題があった。   For this reason, there has been a problem that, for a certain period (until the capacitor of the auxiliary power supply unit is charged), it is necessary to supply power to the auxiliary power supply unit in addition to supplying power to the LED as a load. In addition, the auxiliary power supply section gradually consumes the stored power by variable resistance or PWM (pulse width modulation) control so that the LED is delayed and extinguished after the external power supply (AC (alternating current) power supply, etc.) stops. However, there is a problem that a dedicated circuit for that purpose becomes large and the lighting device becomes expensive.

本発明は、例えば、外部電源が切られた後に既存のコンデンサを利用して複数のＬＥＤの一部を一定時間点灯させることを目的とする。   An object of the present invention is to, for example, turn on some of a plurality of LEDs for a certain period of time using an existing capacitor after an external power supply is turned off.

本発明の一の態様に係る照明装置は、
光を発する複数のＬＥＤと、
前記複数のＬＥＤと並列に接続されるコンデンサを有する電源部であり、外部電源から給電された場合、前記コンデンサを充電するとともに前記コンデンサにより平滑される電流を前記複数のＬＥＤに出力し、前記外部電源からの給電が停止した場合、前記コンデンサに充電した電流を前記複数のＬＥＤに出力した後に電流の出力を停止する電源部と、
前記外部電源からの給電の状態を監視する給電監視部と、
前記電源監視部により前記外部電源からの給電が停止したことが検出された場合、前記電源部から出力される電流を、前記複数のＬＥＤのうち、一部のＬＥＤに流れるように制御する制御部とを備える。 A lighting device according to one embodiment of the present invention includes:
A plurality of LEDs emitting light;
A power source having a capacitor connected in parallel with the plurality of LEDs, and when supplied from an external power source, the capacitor is charged and the current smoothed by the capacitor is output to the plurality of LEDs; When power supply from the power supply is stopped, a power supply unit that stops outputting the current after outputting the current charged in the capacitor to the plurality of LEDs, and
A power supply monitoring unit for monitoring the state of power supply from the external power source;
When the power supply monitoring unit detects that the power supply from the external power supply is stopped, the control unit controls the current output from the power supply unit to flow to some of the LEDs among the plurality of LEDs. With.

本発明の一の態様によれば、外部電源が切られた後に既存のコンデンサを利用して複数のＬＥＤの一部を一定時間点灯させることが可能となる。   According to one aspect of the present invention, it is possible to turn on some of the plurality of LEDs for a certain period of time using an existing capacitor after the external power supply is turned off.

実施の形態１に係るＬＥＤ照明装置の構成を示す回路図。FIG. 3 is a circuit diagram illustrating a configuration of the LED lighting device according to the first embodiment. 実施の形態２に係るＬＥＤ照明装置の構成を示す回路図。FIG. 6 is a circuit diagram showing a configuration of an LED lighting device according to Embodiment 2.

以下、本発明の実施の形態について、図を用いて説明する。   Hereinafter, embodiments of the present invention will be described with reference to the drawings.

実施の形態１．
図１は、本実施の形態に係るＬＥＤ照明装置１０（照明装置の例）の構成を示す回路図である。 Embodiment 1 FIG.
FIG. 1 is a circuit diagram showing a configuration of an LED lighting device 10 (an example of a lighting device) according to the present embodiment.

図１において、ＬＥＤ照明装置１０は、光を発する複数のＬＥＤが実装されるＬＥＤモジュール３５と、このＬＥＤモジュール３５が接続されるＬＥＤ点灯装置１１とを備える。   In FIG. 1, the LED lighting device 10 includes an LED module 35 on which a plurality of LEDs that emit light are mounted, and an LED lighting device 11 to which the LED module 35 is connected.

ＬＥＤ点灯装置１１は、ＡＣ電源１７（外部電源の例）のオン／オフの状態を検出するＡＣ電源検出回路１４（給電監視部の例）と、入力電流の力率を改善する力率改善回路１２と、ＬＥＤを点灯させるために定電流もしくは定電圧をＬＥＤモジュール３５に出力する点灯回路１３（電源部の例）と、力率改善回路１２を制御する制御回路２２と、点灯回路１３を制御する制御回路２９と、遅延制御装置３６（制御部の例）とを備える。   The LED lighting device 11 includes an AC power supply detection circuit 14 (an example of a power supply monitoring unit) that detects an on / off state of an AC power supply 17 (an example of an external power supply), and a power factor improvement circuit that improves the power factor of an input current. 12, a lighting circuit 13 (an example of a power supply unit) that outputs a constant current or a constant voltage to the LED module 35 to light the LED, a control circuit 22 that controls the power factor correction circuit 12, and a lighting circuit 13. And a delay control device 36 (an example of a control unit).

ＡＣ電源検出回路１４は、ＡＣ電源１７からの給電の状態を監視する。ＡＣ電源検出回路１４は、ＡＣ電源１７からの給電が停止したことを検出すると、ＡＣ電源１７からの給電が停止したこと（ＡＣ電源１７がオフであること）を示す信号を遅延制御装置３６に出力する。   The AC power supply detection circuit 14 monitors the state of power supply from the AC power supply 17. When the AC power supply detection circuit 14 detects that the power supply from the AC power supply 17 is stopped, the AC power supply detection circuit 14 sends a signal indicating that the power supply from the AC power supply 17 is stopped (the AC power supply 17 is off) to the delay control device 36. Output.

力率改善回路１２は、ＡＣ電源１７からの入力電圧を全波整流して脈流電圧を生成するダイオードブリッジ１８と、その脈流電圧を平滑するコンデンサ１９と、コンデンサ１９の電圧を昇圧するインダクタ２０及びＭＯＳＦＥＴ２１と、このインダクタ２０及びＭＯＳＦＥＴ２１に接続されるダイオード２４と、このダイオード２４に接続される電解コンデンサ２７と、この電解コンデンサ２７に並列に接続される、直列接続された抵抗２５，２６と、この抵抗２５，２６の中点に接続され、制御回路２２にフィードバック信号を出力するフィードバック部２３とを備える。   The power factor correction circuit 12 includes a diode bridge 18 that generates a pulsating voltage by full-wave rectifying the input voltage from the AC power supply 17, a capacitor 19 that smoothes the pulsating voltage, and an inductor that boosts the voltage of the capacitor 19. 20 and MOSFET 21, a diode 24 connected to the inductor 20 and MOSFET 21, an electrolytic capacitor 27 connected to the diode 24, and series-connected resistors 25 and 26 connected in parallel to the electrolytic capacitor 27. And a feedback unit 23 that is connected to the midpoint of the resistors 25 and 26 and outputs a feedback signal to the control circuit 22.

ＭＯＳＦＥＴ２１は、制御回路２２によって制御されて、オン／オフのスイッチング動作をする。ＭＯＳＦＥＴ２１がオンのときは、インダクタ２０に電流が流れてエネルギーが蓄えられる。ＭＯＳＦＥＴ２１がオフになると、インダクタ２０に蓄えられたエネルギーがダイオード２４を介して電解コンデンサ２７に放出され、電解コンデンサ２７の電圧がコンデンサ１９よりも高い電圧に昇圧される。電解コンデンサ２７に発生した電圧は抵抗２５と抵抗２６によって分圧され、フィードバック部２３を介して、制御回路２２に入力される。この電圧を基に制御回路２２は電解コンデンサ２７の電圧が一定（約４００Ｖ）となるようにＭＯＳＦＥＴ２１のオン／オフを制御している。   The MOSFET 21 is controlled by the control circuit 22 to perform an on / off switching operation. When MOSFET 21 is on, a current flows through inductor 20 to store energy. When the MOSFET 21 is turned off, the energy stored in the inductor 20 is released to the electrolytic capacitor 27 through the diode 24, and the voltage of the electrolytic capacitor 27 is boosted to a voltage higher than that of the capacitor 19. The voltage generated in the electrolytic capacitor 27 is divided by the resistor 25 and the resistor 26 and input to the control circuit 22 through the feedback unit 23. Based on this voltage, the control circuit 22 controls the on / off of the MOSFET 21 so that the voltage of the electrolytic capacitor 27 becomes constant (about 400 V).

点灯回路１３は、電解コンデンサ２７に並列に接続されるＭＯＳＦＥＴ２８と、このＭＯＳＦＥＴ２８に直列に接続されるダイオード３１と、このダイオード３１に並列に接続されるインダクタ３２と、このインダクタ３２に直列接続される電解コンデンサ３３（コンデンサの例）と、この電解コンデンサ３３に直列接続される抵抗３４と、この抵抗３４と電解コンデンサ３３の中点に接続され、制御回路２９にフィードバック信号を出力するフィードバック部３０とを備える。   The lighting circuit 13 includes a MOSFET 28 connected in parallel to the electrolytic capacitor 27, a diode 31 connected in series to the MOSFET 28, an inductor 32 connected in parallel to the diode 31, and a series connection to the inductor 32. An electrolytic capacitor 33 (an example of a capacitor), a resistor 34 connected in series to the electrolytic capacitor 33, a feedback unit 30 connected to the middle point of the resistor 34 and the electrolytic capacitor 33, and outputting a feedback signal to the control circuit 29 Is provided.

ＭＯＳＦＥＴ２８は、制御回路２９によってオン／オフ制御されている。ＭＯＳＦＥＴ２８がオンになると、インダクタ３２、電解コンデンサ３３、抵抗３４の経路で電流が流れて電解コンデンサ３３が充電される。このとき、インダクタ３２にエネルギーが蓄えられる。ＭＯＳＦＥＴ２８がオフになると、インダクタ３２に蓄えられたエネルギーが放出され、電解コンデンサ３３、抵抗３４、ダイオード３１の順に電流が流れ、さらに電解コンデンサ３３が充電される。充電された電解コンデンサ３３の電圧がＬＥＤモジュール３５の順方向電圧を超えるとＬＥＤモジュール３５に電流が流れる。抵抗３４に電流が流れると抵抗３４に電圧が発生し、フィードバック部３０を介して、制御回路２９に入力される。この電圧を基に制御回路２９はＬＥＤに流れる電流が一定となるようにＭＯＳＦＥＴ２８をオン／オフ制御している。   The MOSFET 28 is on / off controlled by a control circuit 29. When the MOSFET 28 is turned on, a current flows through the path of the inductor 32, the electrolytic capacitor 33, and the resistor 34, and the electrolytic capacitor 33 is charged. At this time, energy is stored in the inductor 32. When MOSFET 28 is turned off, the energy stored in inductor 32 is released, current flows in the order of electrolytic capacitor 33, resistor 34, and diode 31, and electrolytic capacitor 33 is charged. When the voltage of the charged electrolytic capacitor 33 exceeds the forward voltage of the LED module 35, a current flows through the LED module 35. When a current flows through the resistor 34, a voltage is generated at the resistor 34 and is input to the control circuit 29 via the feedback unit 30. Based on this voltage, the control circuit 29 performs on / off control of the MOSFET 28 so that the current flowing through the LED becomes constant.

上記のように、点灯回路１３は、ＬＥＤモジュール３５に実装された複数のＬＥＤと並列に接続される電解コンデンサ３３を有する。点灯回路１３は、ＡＣ電源１７から給電された場合（ＡＣ電源１７がオンの場合）、電解コンデンサ３３を充電するとともに、電解コンデンサ３３により平滑される電流をＬＥＤモジュール３５に実装された複数のＬＥＤに出力する。点灯回路１３は、ＡＣ電源１７からの給電が停止した場合（ＡＣ電源１７がオフになった場合）、電解コンデンサ３３に充電した電流をＬＥＤモジュール３５に実装された複数のＬＥＤに出力した後に、ＬＥＤモジュール３５への電流の出力を停止する。   As described above, the lighting circuit 13 includes the electrolytic capacitor 33 connected in parallel with the plurality of LEDs mounted on the LED module 35. When the lighting circuit 13 is supplied with power from the AC power supply 17 (when the AC power supply 17 is turned on), the lighting circuit 13 charges the electrolytic capacitor 33 and a plurality of LEDs mounted on the LED module 35 with a current smoothed by the electrolytic capacitor 33. Output to. When the power supply from the AC power supply 17 is stopped (when the AC power supply 17 is turned off), the lighting circuit 13 outputs the current charged in the electrolytic capacitor 33 to the plurality of LEDs mounted on the LED module 35. The output of current to the LED module 35 is stopped.

ＬＥＤモジュール３５は、直列接続された５個のＬＥＤからなり、電解コンデンサ３３に並列に接続される。   The LED module 35 includes five LEDs connected in series, and is connected to the electrolytic capacitor 33 in parallel.

遅延制御装置３６は、直列接続された５個のＬＥＤのうち、低電位側の３個のＬＥＤに対して並列に接続されるトランジスタ３７と、ＡＣ電源検出回路１４に接続され、トランジスタ３７のオン／オフを制御する制御回路３８とを備える。   The delay control device 36 is connected to the transistor 37 connected in parallel to the three LEDs on the low potential side among the five LEDs connected in series, and to the AC power supply detection circuit 14, and the transistor 37 is turned on. And a control circuit 38 for controlling OFF.

制御回路３８は、ＡＣ電源検出回路１４よりＡＣ電源１７が遮断されたことを通知されると、トランジスタ３７をオンに制御して、ＬＥＤモジュール３５の一部のＬＥＤ（本実施の形態では、直列接続された５個のＬＥＤのうち、低電位側の３個のＬＥＤ）を短絡させる。   When the control circuit 38 is notified by the AC power supply detection circuit 14 that the AC power supply 17 has been cut off, the control circuit 38 controls the transistor 37 to be turned on, so that some LEDs of the LED module 35 (in this embodiment, in series) Among the five connected LEDs, three LEDs on the low potential side are short-circuited.

上記のように、遅延制御装置３６は、ＡＣ電源検出回路１４によりＡＣ電源１７からの給電が停止したことを示す信号が入力された場合、点灯回路１３から出力される電流を、ＬＥＤモジュール３５に実装された複数のＬＥＤ（５個のＬＥＤ）のうち、一部のＬＥＤ（２個のＬＥＤ）に流れるように制御する。これにより、上記一部のＬＥＤ（２個のＬＥＤ）は、ＡＣ電源１７の遮断後、暫く点灯してから消灯する。即ち、上記一部のＬＥＤ（２個のＬＥＤ）は遅延消灯する。一方、上記一部のＬＥＤ以外のＬＥＤ（３個のＬＥＤ）（少なくとも２つのＬＥＤの例）は、ＡＣ電源１７の遮断後、すぐに消灯する。即ち、上記一部のＬＥＤ以外のＬＥＤ（３個のＬＥＤ）は即時消灯する。   As described above, when the signal indicating that the power supply from the AC power supply 17 is stopped by the AC power supply detection circuit 14 is input to the delay control device 36, the current output from the lighting circuit 13 is supplied to the LED module 35. It controls so that it may flow into some LED (2 LED) among some mounted LED (5 LED). As a result, some of the LEDs (two LEDs) are turned on for a while after the AC power supply 17 is shut off and then turned off. That is, some of the LEDs (two LEDs) are turned off with delay. On the other hand, LEDs (three LEDs) other than the some LEDs (an example of at least two LEDs) are turned off immediately after the AC power supply 17 is shut off. That is, the LEDs other than the part of the LEDs (three LEDs) are immediately turned off.

具体的には、遅延制御装置３６は、ＡＣ電源検出回路１４によりＡＣ電源１７からの給電が停止したことを示す信号が入力された場合、直列に接続された２つ以上のＬＥＤ（５個のＬＥＤ）のうち、即時消灯させるＬＥＤ（３個のＬＥＤ）を短絡させる。そのために、本実施の形態では、遅延制御装置３６が、即時消灯させるＬＥＤ（３個のＬＥＤ）と並列に接続されたトランジスタ３７を有する。遅延制御装置３６は、ＡＣ電源検出回路１４によりＡＣ電源１７からの給電が停止したことを示す信号が入力された場合、トランジスタ３７を能動領域で一定時間動作させた後にトランジスタ３７をオンにする。これにより、即時消灯させるＬＥＤ（３個のＬＥＤ）を徐々に暗くしてから消灯させることができる。   Specifically, when a signal indicating that power supply from the AC power supply 17 is stopped by the AC power supply detection circuit 14 is input to the delay control device 36, two or more LEDs (5 pieces connected in series) are connected. Among the LEDs), the LEDs that are immediately turned off (three LEDs) are short-circuited. For this purpose, in the present embodiment, the delay control device 36 includes a transistor 37 connected in parallel with the LEDs that are immediately turned off (three LEDs). When a signal indicating that the power supply from the AC power supply 17 is stopped is input from the AC power supply detection circuit 14, the delay control device 36 operates the transistor 37 in the active region for a certain period of time and then turns on the transistor 37. As a result, the LEDs that are immediately turned off (three LEDs) can be turned off after gradually darkening.

ＬＥＤモジュール３５に実装された複数のＬＥＤ（５個のＬＥＤ）としては、全て色温度が同じ光を発するものを用いてもよいが、色温度が異なる光を発するものを用いてもよい。例えば、遅延消灯させるＬＥＤ（２個のＬＥＤ）に、即時消灯させるＬＥＤ（３個のＬＥＤ）より色温度が低い光を発するものを用いてもよい。この場合、電源遮断時においても一定時間は、ＬＥＤ照明装置１０が設置された部屋等を、全てのＬＥＤに色温度が同じ光を発するものを用いた場合より明るく保つことができる。よって、より確実に使用者の安全を確保できる。   As the plurality of LEDs (five LEDs) mounted on the LED module 35, those that emit light having the same color temperature may be used, but those that emit light having different color temperatures may be used. For example, an LED that emits light having a color temperature lower than that of an LED that is immediately turned off (three LEDs) may be used as the LED that is turned off late (two LEDs). In this case, even when the power is shut off, the room where the LED lighting device 10 is installed can be kept brighter than when all LEDs emit light having the same color temperature. Therefore, the safety of the user can be ensured more reliably.

なお、本実施の形態では、ＬＥＤモジュール３５が直列接続された５個のＬＥＤで構成されているが、ＬＥＤモジュール３５は、４個以下（ただし、２個以上）又は６個以上の直列接続されたＬＥＤで構成されていてもよい。また、本実施の形態では、ＡＣ電源１７が遮断された場合に、５個のＬＥＤのうち、３個のＬＥＤを短絡させるが、２個以下又は４個のＬＥＤを短絡させてもよい。   In the present embodiment, the LED module 35 is composed of five LEDs connected in series. However, the LED module 35 is connected in series with 4 or less (but 2 or more) or 6 or more. You may be comprised with LED. Moreover, in this Embodiment, when AC power supply 17 is interrupted | blocked, 3 LEDs are short-circuited among 5 LEDs, However, 2 or less or 4 LEDs may be short-circuited.

次に、本実施の形態におけるＬＥＤ照明装置１０の動作について説明する。   Next, operation | movement of the LED lighting apparatus 10 in this Embodiment is demonstrated.

ＡＣ電源１７がオフになると、ＡＣ電源検出回路１４はＡＣ電源１７のオフ状態を検出し、遅延制御装置３６に信号を出力する。遅延制御装置３６内の制御回路３８はＡＣ電源検出回路１４からの信号を読み取り、トランジスタ３７に信号を出力する。トランジスタ３７はオフ（オープン）から能動的に、徐々にオンになる（即ち、可変抵抗として動作する）。つまり、制御回路３８はトランジスタ３７を能動領域で制御する。   When the AC power supply 17 is turned off, the AC power supply detection circuit 14 detects the off state of the AC power supply 17 and outputs a signal to the delay control device 36. The control circuit 38 in the delay control device 36 reads the signal from the AC power supply detection circuit 14 and outputs the signal to the transistor 37. The transistor 37 is actively turned on from off (open) and gradually turned on (that is, operates as a variable resistor). That is, the control circuit 38 controls the transistor 37 in the active region.

本実施の形態では、ＬＥＤモジュール３５に実装された５個のＬＥＤのうち、低電位側の３個のＬＥＤが、ＡＣ電源１７の遮断とほぼ同時にトランジスタ３７によってショートされ、残りの２個のＬＥＤのみが点灯する。   In the present embodiment, among the five LEDs mounted on the LED module 35, the three LEDs on the low potential side are short-circuited by the transistor 37 almost simultaneously with the interruption of the AC power supply 17, and the remaining two LEDs Only lights up.

電解コンデンサ３３に対する負荷が２／５になったことによって、電解コンデンサ３３の充電エネルギーの消費が抑えられ、ＡＣ電源１７の遮断後も上記２個のＬＥＤが一定時間点灯し続ける（即ち、遅延消灯する）。   Since the load on the electrolytic capacitor 33 becomes 2/5, consumption of the charging energy of the electrolytic capacitor 33 is suppressed, and the two LEDs continue to be lit for a certain period of time after the AC power supply 17 is shut off (that is, delayed extinction). To do).

このように、本実施の形態では、ＡＣ電源１７が切られたことを検出すると、点灯させるＬＥＤの数を（例えば、１／２や１／３に）減らすことで、特別な電源や電源側の制御がなくともＬＥＤを所定の時間点灯させることができる。つまり、本実施の形態によれば、ＡＣ電源１７の遮断時に負荷であるＬＥＤの消費電力を減らす工夫として、ＬＥＤの数を制限することで、既存の電源に含まれる電解コンデンサ３３で所定の時間ＬＥＤを点灯させることができる。また、これにより、ＡＣ電源１７の遮断時に電解コンデンサ３３の電荷を使い切ることができるため、その後の感電等のおそれがなくなり、安全性が向上する。   As described above, in this embodiment, when detecting that the AC power supply 17 is turned off, the number of LEDs to be turned on is reduced (for example, to 1/2 or 1/3), so that the special power supply or power supply side is reduced. Even without this control, the LED can be lit for a predetermined time. In other words, according to the present embodiment, as a device for reducing the power consumption of the LED as a load when the AC power supply 17 is shut off, the number of LEDs is limited so that the electrolytic capacitor 33 included in the existing power supply can be used for a predetermined time. The LED can be turned on. Further, since the electric charge of the electrolytic capacitor 33 can be used up when the AC power supply 17 is shut off, there is no possibility of subsequent electric shock and the safety is improved.

以上説明したように、本実施の形態では、ＬＥＤ照明装置１０が、複数のＬＥＤを点灯させるＬＥＤ点灯装置１１と、複数のＬＥＤと並列に接続され、脈流を整流する電解コンデンサ３３と、ＡＣ電源１７を検出するＡＣ電源検出回路１４と、ＬＥＤ点灯装置１１に供給されるＡＣ電源１７が遮断されたとき、電解コンデンサ３３によって所定期間、ＬＥＤを発光させる遅延制御装置３６とを備える。このため、本実施の形態によれば、ＡＣ電源１７が切られた後に既存の電解コンデンサ３３を利用して複数のＬＥＤの一部を一定時間点灯させることが可能となる。   As described above, in the present embodiment, the LED lighting device 10 includes the LED lighting device 11 that turns on the plurality of LEDs, the electrolytic capacitor 33 that is connected in parallel with the plurality of LEDs and rectifies the pulsating current, and the AC. An AC power source detection circuit 14 that detects the power source 17 and a delay control device 36 that causes the LED to emit light for a predetermined period when the AC power source 17 supplied to the LED lighting device 11 is cut off are provided. For this reason, according to the present embodiment, it is possible to turn on some of the plurality of LEDs for a certain period of time using the existing electrolytic capacitor 33 after the AC power supply 17 is turned off.

実施の形態２．
本実施の形態について、主に実施の形態１との差異を説明する。 Embodiment 2. FIG.
In the present embodiment, differences from the first embodiment will be mainly described.

図２は、本実施の形態に係るＬＥＤ照明装置１０の構成を示す回路図である。   FIG. 2 is a circuit diagram showing a configuration of the LED lighting device 10 according to the present embodiment.

図２において、ＬＥＤモジュール３５は、並列に接続された３個のＬＥＤ群３５ａ〜３５ｃからなる。各ＬＥＤ群は、直列に接続された５個のＬＥＤ（２つ以上のＬＥＤの例）で構成されている。   In FIG. 2, the LED module 35 includes three LED groups 35a to 35c connected in parallel. Each LED group is composed of five LEDs (an example of two or more LEDs) connected in series.

遅延制御装置３６は、ＬＥＤモジュール３５の３個のＬＥＤ群３５ａ〜３５ｃのうち、２個のＬＥＤ群３５ａ，３５ｂのカソードとＧＮＤ（アース）との間にそれぞれ接続されたトランジスタ４０，４１を有する。なお、トランジスタ４０，４１が接続されていないＬＥＤ群３５ｃには補償用ダイオード３９が接続されている。   The delay control device 36 includes transistors 40 and 41 connected between the cathodes of the two LED groups 35a and 35b and the GND (ground) among the three LED groups 35a to 35c of the LED module 35, respectively. . A compensation diode 39 is connected to the LED group 35c to which the transistors 40 and 41 are not connected.

その他の基本的な回路構成は実施の形態１と同様である。   Other basic circuit configurations are the same as those in the first embodiment.

遅延制御装置３６は、ＡＣ電源検出回路１４によりＡＣ電源１７からの給電が停止したことを示す信号が入力された場合、点灯回路１３から出力される電流を、ＬＥＤモジュール３５に実装された複数のＬＥＤ群（３個のＬＥＤ群３５ａ〜３５ｃ）のうち、一部のＬＥＤ群（２個のＬＥＤ群３５ａ，３５ｂ）以外のＬＥＤ群（１個のＬＥＤ群３５ｃ）に流れるように制御する。これにより、上記一部のＬＥＤ群（２個のＬＥＤ群３５ａ，３５ｂ）（少なくとも２つのＬＥＤ群の例）は、ＡＣ電源１７の遮断後、すぐに消灯する。即ち、上記一部のＬＥＤ群（２個のＬＥＤ群３５ａ，３５ｂ）は即時消灯する。一方、上記一部のＬＥＤ群以外のＬＥＤ群（１個のＬＥＤ群３５ｃ）は、ＡＣ電源１７の遮断後、暫く点灯してから消灯する。即ち、上記一部のＬＥＤ群以外のＬＥＤ群（１個のＬＥＤ群３５ｃ）は遅延消灯する。   When a signal indicating that the power supply from the AC power supply 17 is stopped by the AC power supply detection circuit 14 is input to the delay control device 36, the current output from the lighting circuit 13 is supplied to the plurality of LEDs mounted on the LED module 35. It controls so that it may flow into LED groups (one LED group 35c) other than some LED groups (two LED groups 35a and 35b) among LED groups (three LED groups 35a-35c). As a result, the partial LED groups (two LED groups 35a and 35b) (an example of at least two LED groups) are turned off immediately after the AC power supply 17 is shut off. That is, the partial LED group (two LED groups 35a and 35b) is immediately turned off. On the other hand, the LED groups (one LED group 35c) other than the part of the LED groups are turned on for a while after the AC power supply 17 is shut off and then turned off. That is, LED groups other than the part of the LED groups (one LED group 35c) are turned off with delay.

具体的には、遅延制御装置３６は、ＡＣ電源検出回路１４によりＡＣ電源１７からの給電が停止したことを示す信号が入力された場合、ＬＥＤモジュール３５に実装された複数のＬＥＤ群（３個のＬＥＤ群３５ａ〜３５ｃ）のうち、即時消灯させるＬＥＤ群（２個のＬＥＤ群３５ａ，３５ｂ）を開放させる。そのために、本実施の形態では、遅延制御装置３６が、即時消灯させるＬＥＤ群（２個のＬＥＤ群３５ａ，３５ｂ）と直列に接続されたトランジスタ４０，４１を有する。遅延制御装置３６は、ＡＣ電源検出回路１４によりＡＣ電源１７からの給電が停止したことを示す信号が入力された場合、トランジスタ４０，４１を能動領域で一定時間動作させた後にトランジスタ４０，４１をオフにする。これにより、即時消灯させるＬＥＤ群（２個のＬＥＤ群３５ａ，３５ｂ）を徐々に暗くしてから消灯させることができる。   Specifically, when a signal indicating that the power supply from the AC power supply 17 is stopped is input by the AC power supply detection circuit 14, the delay control device 36 includes a plurality of LED groups (three LEDs) mounted on the LED module 35. LED groups (two LED groups 35a and 35b) that are immediately turned off among the LED groups 35a to 35c) are opened. Therefore, in the present embodiment, the delay control device 36 includes transistors 40 and 41 connected in series with an LED group (two LED groups 35a and 35b) to be immediately turned off. When a signal indicating that the power supply from the AC power supply 17 is stopped is input by the AC power supply detection circuit 14, the delay control device 36 operates the transistors 40 and 41 in the active region for a certain period of time and then turns the transistors 40 and 41 on. Turn off. Thereby, the LED group (two LED groups 35a and 35b) to be immediately turned off can be turned off after gradually darkening.

遅延制御装置３６は、ＡＣ電源検出回路１４によりＡＣ電源１７からの給電が停止したことを示す信号が入力された場合、即時消灯させるＬＥＤ群（２個のＬＥＤ群３５ａ，３５ｂ）を全て同時に開放させてもよいが、異なるタイミングで開放させてもよい。例えば、遅延制御装置３６は、即時消灯させるＬＥＤ群（２個のＬＥＤ群３５ａ，３５ｂ）を一定順序で開放させていってもよい。この場合、即時消灯させるＬＥＤ群（２個のＬＥＤ群３５ａ，３５ｂ）を１つずつ順番に消灯させることができる。このとき、電解コンデンサ３３の放電速度に合わせてＬＥＤ群を１つずつ順番に消灯させてもよい。即ち、遅延制御装置３６は、電解コンデンサ３３から１つのＬＥＤ群の順方向電圧が放電される度に、１つのＬＥＤ群（ＬＥＤ群３５ａ，３５ｂのいずれか）に接続されたトランジスタ（トランジスタ４０，４１のいずれか）をオフに制御して、当該１つのＬＥＤ群を開放させてもよい。このとき、例えば、遅延制御装置３６に内蔵されたマイコン等（制御回路３８）が、ＡＣ電源検出回路１４によりＡＣ電源１７からの給電が停止したことを示す信号が入力された時点からの経過時間を計測する。そして、予めメモリ等に記憶された電解コンデンサ３３の放電時間（１つのＬＥＤ群の順方向電圧が放電される時間）が経過したときにトランジスタをオフにする。電解コンデンサ３３の放電時間は、ＬＥＤ群ごとに異なっていてもよく、その場合はＬＥＤ群ごとの放電時間がメモリ等に記憶される。   When the signal indicating that the power supply from the AC power supply 17 is stopped is input by the AC power supply detection circuit 14, the delay control device 36 opens all the LED groups (two LED groups 35 a and 35 b) that are immediately turned off simultaneously. However, it may be opened at different timings. For example, the delay control device 36 may open the LED groups (two LED groups 35a and 35b) that are immediately turned off in a predetermined order. In this case, the LED groups to be immediately turned off (two LED groups 35a and 35b) can be turned off one by one in order. At this time, the LED groups may be turned off one by one in order according to the discharge speed of the electrolytic capacitor 33. That is, each time the forward voltage of one LED group is discharged from the electrolytic capacitor 33, the delay control device 36 is connected to one of the LED groups (one of the LED groups 35a and 35b) (transistor 40, 41) may be controlled to be turned off to open the one LED group. At this time, for example, an elapsed time from when a signal indicating that power supply from the AC power supply 17 is stopped by the AC power supply detection circuit 14 is input to the microcomputer or the like (control circuit 38) built in the delay control device 36. Measure. Then, the transistor is turned off when the discharge time of the electrolytic capacitor 33 previously stored in the memory or the like (the time during which the forward voltage of one LED group is discharged) has elapsed. The discharge time of the electrolytic capacitor 33 may be different for each LED group. In this case, the discharge time for each LED group is stored in a memory or the like.

ＬＥＤモジュール３５に実装された複数のＬＥＤ群（３個のＬＥＤ群３５ａ〜３５ｃ）としては、全て色温度が同じ光を発するものを用いてもよいが、色温度が異なる光を発するものを用いてもよい。例えば、遅延消灯させるＬＥＤ群（１個のＬＥＤ群３５ｃ）に、即時消灯させるＬＥＤ群（２個のＬＥＤ群３５ａ，３５ｂ）より色温度が低い光を発するものを用いてもよい。この場合、電源遮断時においても一定時間は、ＬＥＤ照明装置１０が設置された部屋等を、全てのＬＥＤ群に色温度が同じ光を発するものを用いた場合より明るく保つことができる。よって、より確実に使用者の安全を確保できる。   As a plurality of LED groups (three LED groups 35a to 35c) mounted on the LED module 35, those that emit light having the same color temperature may be used, but those that emit light having different color temperatures may be used. May be. For example, an LED group that emits light with a delayed color temperature (one LED group 35c) that emits light whose color temperature is lower than that of the LED group that is immediately extinguished (two LED groups 35a and 35b) may be used. In this case, even when the power is shut off, the room in which the LED lighting device 10 is installed can be kept brighter than the case where all the LED groups emit light having the same color temperature. Therefore, the safety of the user can be ensured more reliably.

なお、本実施の形態では、ＬＥＤモジュール３５が並列接続された３個のＬＥＤ群３５ａ〜３５ｃで構成されているが、ＬＥＤモジュール３５は、２個又は４個以上の並列接続されたＬＥＤ群で構成されていてもよい。また、本実施の形態では、ＡＣ電源１７が遮断された場合に、３個のＬＥＤ群３５ａ〜３５ｃのうち、２個のＬＥＤ群３５ａ，３５ｂを開放させるが、１個のＬＥＤ群のみを開放させてもよい。   In this embodiment, the LED module 35 includes three LED groups 35a to 35c connected in parallel. The LED module 35 includes two or four or more LED groups connected in parallel. It may be configured. In the present embodiment, when the AC power supply 17 is cut off, the two LED groups 35a and 35b are opened out of the three LED groups 35a to 35c, but only one LED group is opened. You may let them.

次に、本実施の形態におけるＬＥＤ照明装置１０の動作について説明する。   Next, operation | movement of the LED lighting apparatus 10 in this Embodiment is demonstrated.

ＡＣ電源１７がオフになると、ＡＣ電源検出回路１４はＡＣ電源１７のオフ状態を検出し、遅延制御装置３６に信号を出力する。遅延制御装置３６内の制御回路３８はＡＣ電源検出回路１４からの信号を読み取り、トランジスタ４０，４１に信号を出力する。トランジスタ４０，４１はオン（ショート）から能動的に、徐々にオフになる（即ち、可変抵抗として動作する）。つまり、制御回路３８はトランジスタ４０，４１を能動領域で制御する。   When the AC power supply 17 is turned off, the AC power supply detection circuit 14 detects the off state of the AC power supply 17 and outputs a signal to the delay control device 36. The control circuit 38 in the delay control device 36 reads the signal from the AC power supply detection circuit 14 and outputs the signal to the transistors 40 and 41. The transistors 40 and 41 are actively turned on (shorted) and gradually turned off (that is, operate as variable resistors). That is, the control circuit 38 controls the transistors 40 and 41 in the active region.

本実施の形態では、ＬＥＤモジュール３５に実装された３個のＬＥＤ群３５ａ〜３５ｃのうち、２個のＬＥＤ群３５ａ，３５ｂが、ＡＣ電源１７の遮断とほぼ同時にトランジスタ４０，４１によって切り離されて消灯し、補償用ダイオード３９が接続されるＬＥＤ群３５ｃが遅延消灯する。   In the present embodiment, of the three LED groups 35 a to 35 c mounted on the LED module 35, two LED groups 35 a and 35 b are separated by the transistors 40 and 41 almost simultaneously with the interruption of the AC power supply 17. The LED group 35c connected to the compensation diode 39 is turned off with a delay.

以上、本発明の実施の形態について説明したが、これらのうち、２つ以上の実施の形態を組み合わせて実施しても構わない。あるいは、これらのうち、１つの実施の形態を部分的に実施しても構わない。あるいは、これらのうち、２つ以上の実施の形態を部分的に組み合わせて実施しても構わない。   As mentioned above, although embodiment of this invention was described, you may implement combining 2 or more embodiment among these. Alternatively, one of these embodiments may be partially implemented. Or you may implement combining two or more embodiment among these partially.

１０ ＬＥＤ照明装置、１１ ＬＥＤ点灯装置、１２ 力率改善回路、１３ 点灯回路、１４ ＡＣ電源検出回路、１７ ＡＣ電源、１８ ダイオードブリッジ、１９ コンデンサ、２０，３２ インダクタ、２１，２８ ＭＯＳＦＥＴ、２２，２９，３８ 制御回路、２３，３０ フィードバック部、２４，３１ ダイオード、２５，２６，３４ 抵抗、２７，３３ 電解コンデンサ、３５ ＬＥＤモジュール、３５ａ，３５ｂ，３５ｃ ＬＥＤ群、３６ 遅延制御装置、３７，４０，４１ トランジスタ、３９ 補償用ダイオード。   DESCRIPTION OF SYMBOLS 10 LED lighting device, 11 LED lighting device, 12 Power factor improvement circuit, 13 Lighting circuit, 14 AC power supply detection circuit, 17 AC power supply, 18 Diode bridge, 19 Capacitor, 20, 32 Inductor, 21,28 MOSFET, 22, 29 , 38 control circuit, 23, 30 feedback unit, 24, 31 diode, 25, 26, 34 resistance, 27, 33 electrolytic capacitor, 35 LED module, 35a, 35b, 35c LED group, 36 delay control device, 37, 40, 41 Transistor, 39 Compensation diode.

Claims (7)

光を発する複数のＬＥＤと、
前記複数のＬＥＤと並列に接続されるコンデンサを有する電源部であり、外部電源から給電された場合、前記コンデンサを充電するとともに前記コンデンサにより平滑される電流を前記複数のＬＥＤに出力し、前記外部電源からの給電が停止した場合、前記コンデンサに充電した電流を前記複数のＬＥＤに出力した後に電流の出力を停止する電源部と、
前記外部電源からの給電の状態を監視する給電監視部と、
前記電源監視部により前記外部電源からの給電が停止したことが検出された場合、前記電源部から出力される電流を、前記複数のＬＥＤのうち、一部のＬＥＤに流れるように制御する制御部と
を備えることを特徴とする照明装置。 A plurality of LEDs emitting light;
A power source having a capacitor connected in parallel with the plurality of LEDs, and when supplied from an external power source, the capacitor is charged and the current smoothed by the capacitor is output to the plurality of LEDs; When power supply from the power supply is stopped, a power supply unit that stops outputting the current after outputting the current charged in the capacitor to the plurality of LEDs, and
A power supply monitoring unit for monitoring the state of power supply from the external power source;
When the power supply monitoring unit detects that the power supply from the external power supply is stopped, the control unit controls the current output from the power supply unit to flow to some of the LEDs among the plurality of LEDs. A lighting device comprising: 前記複数のＬＥＤは、直列に接続された２つ以上のＬＥＤであり、
前記制御部は、前記電源監視部により前記外部電源からの給電が停止したことが検出された場合、前記一部のＬＥＤ以外のＬＥＤを短絡させることを特徴とする請求項１の照明装置。 The plurality of LEDs are two or more LEDs connected in series,
The lighting device according to claim 1, wherein when the power supply monitoring unit detects that power supply from the external power supply is stopped, the control unit short-circuits LEDs other than the some LEDs. 前記制御部は、前記一部のＬＥＤ以外のＬＥＤと並列に接続されたトランジスタを有し、前記電源監視部により前記外部電源からの給電が停止したことが検出された場合、前記トランジスタを能動領域で一定時間動作させた後に前記トランジスタをオンにすることを特徴とする請求項２の照明装置。   The control unit includes a transistor connected in parallel with an LED other than the part of the LEDs, and when the power supply monitoring unit detects that power supply from the external power supply is stopped, the transistor is set in an active region. 3. The lighting device according to claim 2, wherein the transistor is turned on after being operated for a certain period of time. 前記複数のＬＥＤは、並列に接続された複数のＬＥＤ群であって、各ＬＥＤ群が、直列に接続された２つ以上のＬＥＤで構成されている複数のＬＥＤ群であり、
前記制御部は、前記電源監視部により前記外部電源からの給電が停止したことが検出された場合、前記一部のＬＥＤ以外のＬＥＤとして、前記複数のＬＥＤ群のうち、一部のＬＥＤ群を開放させることを特徴とする請求項１の照明装置。 The plurality of LEDs are a plurality of LED groups connected in parallel, and each LED group is a plurality of LED groups composed of two or more LEDs connected in series.
When the control unit detects that the power supply from the external power supply is stopped by the power supply monitoring unit, as the LEDs other than the some LEDs, some of the plurality of LED groups are selected. The lighting device according to claim 1, wherein the lighting device is opened. 前記制御部は、前記一部のＬＥＤ群と直列に接続されたトランジスタを有し、前記電源監視部により前記外部電源からの給電が停止したことが検出された場合、前記トランジスタを能動領域で一定時間動作させた後に前記トランジスタをオフにすることを特徴とする請求項４の照明装置。   The control unit includes a transistor connected in series with the some LED groups, and when the power supply monitoring unit detects that power supply from the external power supply is stopped, the transistor is fixed in an active region. 5. The lighting device according to claim 4, wherein the transistor is turned off after operating for a period of time. 前記一部のＬＥＤ群は、少なくとも２つのＬＥＤ群であり、
前記制御部は、前記電源監視部により前記外部電源からの給電が停止したことが検出された場合、前記少なくとも２つのＬＥＤ群を一定順序で開放させていくことを特徴とする請求項４又は５の照明装置。 The some LED groups are at least two LED groups;
6. The control unit according to claim 4, wherein when the power supply monitoring unit detects that power supply from the external power supply is stopped, the control unit opens the at least two LED groups in a predetermined order. Lighting equipment. 前記一部のＬＥＤは、前記一部のＬＥＤ以外のＬＥＤより色温度が低い光を発することを特徴とする請求項１から６のいずれかの照明装置。   The lighting device according to claim 1, wherein the some LEDs emit light having a color temperature lower than that of the LEDs other than the some LEDs.
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