JP2012204027A - Solid-state light source lighting device and lighting fixture and illumination system using the same - Google Patents

Solid-state light source lighting device and lighting fixture and illumination system using the same Download PDF

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JP2012204027A
JP2012204027A JP2011065092A JP2011065092A JP2012204027A JP 2012204027 A JP2012204027 A JP 2012204027A JP 2011065092 A JP2011065092 A JP 2011065092A JP 2011065092 A JP2011065092 A JP 2011065092A JP 2012204027 A JP2012204027 A JP 2012204027A
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light source
solid
power
dimming
lighting device
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JP5834235B2 (en
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Hiroshi Watanabe
浩士 渡邊
Hiromitsu Mizukawa
宏光 水川
Satoshi Yagi
智史 八木
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Panasonic 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
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Abstract

PROBLEM TO BE SOLVED: To provide a solid-state light source lighting device which can control a solid-state light source appropriately even in a circumstance in which a power supply causes momentary drop or instantaneous power failure.SOLUTION: The solid-state light source lighting device comprises at least one switching circuit 3 connected between a power supply 1 and a solid-state light source 2, a circuit 4 which detects drop or interruption of the power supply 1, and a control circuit 5 which can perform lighting control of the solid-state light source 2 by controlling the switching circuit 3 in response to an external signal s. The external signal s is not accepted for a predetermined period after drop or interruption of the power supply 1 is detected.

Description

本発明は、発光ダイオード（ＬＥＤ）のような固体光源を点灯させる固体光源点灯装置およびそれを用いた照明器具と照明システムに関するものである。   The present invention relates to a solid light source lighting device for lighting a solid light source such as a light emitting diode (LED), and a lighting fixture and a lighting system using the solid light source lighting device.

従来、特許文献１（特許第４，６３６，１０２号公報）によれば、装置外から供給される調光信号に応じて交流電力を直流電力に変換してＬＥＤを調光点灯させるＬＥＤ点灯装置が開示されている。この従来例では、交流電力の供給直後から所定期間の間、ＬＥＤを予め定められた調光で減光して点灯或いは消灯させるように制御し、前記所定期間の経過後、装置外から供給される調光信号に応じてＬＥＤを調光点灯させるものであった。   Conventionally, according to Patent Document 1 (Patent No. 4,636,102), an LED lighting device that dims and lights an LED by converting AC power into DC power according to a dimming signal supplied from outside the device. Is disclosed. In this conventional example, the LED is controlled to be dimmed by a predetermined dimming immediately after the AC power is supplied and turned on or off, and supplied from outside the device after the predetermined period. The LED is dimmed and turned on according to the dimming signal.

特許第４，６３６，１０２号公報Japanese Patent No. 4,636,102

特許文献１の技術では、電源ＯＮのタイミングから所定期間の間、ＬＥＤを予め定められた調光で減光して点灯或いは消灯させるように制御させるものであるから、例えば、電源がＯＦＦされる直前の調光状態を電源がＯＮされた直後の制御に反映させることは出来なかった。   In the technique of Patent Document 1, since the LED is controlled to be dimmed with a predetermined dimming to be turned on or off for a predetermined period from the power-on timing, for example, the power is turned off. The previous dimming state could not be reflected in the control immediately after the power was turned on.

本発明はこのような点に鑑みてなされたものであり、電源が瞬時停電や瞬時降下を起こす環境下であっても固体光源を適切に制御することが可能な固体光源点灯装置を提供することを課題とする。   The present invention has been made in view of the above points, and provides a solid-state light source lighting device capable of appropriately controlling a solid-state light source even in an environment where a power source causes an instantaneous power failure or an instantaneous drop. Is an issue.

請求項１の発明は、上記の課題を解決するために、図１に示すように、電源１と固体光源２との間に接続される少なくとも１つのスイッチング回路３と、電源１の降下または遮断を検出する回路４と、外部信号ｓに応じて前記スイッチング回路３を制御し、固体光源２を調光することが可能な制御回路５を備えた固体光源点灯装置であって、図４に示すように、電源１の降下または遮断を検出した後、所定期間Ｔは、外部信号ｓを受け付けないことを特徴とするものである。   In order to solve the above-mentioned problem, the invention of claim 1, as shown in FIG. 1, includes at least one switching circuit 3 connected between a power source 1 and a solid-state light source 2, and a drop or cut-off of the power source 1. 4 is a solid-state light source lighting device including a circuit 4 for detecting light and a control circuit 5 capable of controlling the switching circuit 3 according to an external signal s and dimming the solid-state light source 2. As described above, after detecting the drop or shut-off of the power source 1, the external signal s is not accepted for a predetermined period T.

請求項２の発明は、請求項１記載の固体光源点灯装置において、前記所定期間Ｔの間、固体光源２を消灯もしくは所定の調光状態で点灯することを特徴とする。   According to a second aspect of the present invention, in the solid-state light source lighting device according to the first aspect, the solid-state light source 2 is turned off or turned on in a predetermined dimming state during the predetermined period T.

請求項３の発明は、請求項２記載の固体光源点灯装置において、電源１の降下または遮断を検出したときの調光状態を記憶しておく記憶部（例えば、マイコン５２のメモリ）を備え、前記所定の調光状態として、前記記憶部に記憶された調光状態を設定することを特徴とする。   A third aspect of the invention is the solid-state light source lighting device according to the second aspect, further comprising a storage unit (for example, a memory of the microcomputer 52) for storing a dimming state when the power source 1 is detected to be lowered or shut off. The dimming state stored in the storage unit is set as the predetermined dimming state.

請求項４の発明は、請求項１〜３のいずれかに記載の固体光源点灯装置を搭載する照明器具である。   Invention of Claim 4 is a lighting fixture carrying the solid light source lighting device in any one of Claims 1-3.

請求項５の発明は、請求項１〜３のいずれかに記載の固体光源点灯装置を搭載する照明システムである。   The invention of claim 5 is an illumination system in which the solid light source lighting device according to any one of claims 1 to 3 is mounted.

本発明によれば、外部信号に応じてスイッチング回路を制御し、固体光源を調光可能な制御回路を備えた固体光源点灯装置において、電源の降下または遮断を検出した後、所定期間は、外部信号を受け付けないので、電源の降下または遮断に起因する過渡的な外部信号の影響を受けにくいという効果がある。   According to the present invention, in a solid-state light source lighting device having a control circuit capable of controlling a switching circuit in accordance with an external signal and dimming the solid-state light source, a predetermined period is Since no signal is accepted, there is an effect that it is difficult to be affected by a transient external signal caused by a power supply drop or interruption.

本発明の実施形態１の回路図である。It is a circuit diagram of Embodiment 1 of the present invention. 従来例の動作説明図である。It is operation | movement explanatory drawing of a prior art example. 従来例の動作説明図である。It is operation | movement explanatory drawing of a prior art example. 本発明の実施形態１の動作説明図である。It is operation | movement explanatory drawing of Embodiment 1 of this invention.

（実施形態１）
図１は本発明の実施形態１の固体光源点灯装置の回路図である。商用の交流電源１には、フィルタ回路ＦＬと全波整流器ＤＢを介して昇圧チョッパ回路８が接続されている。昇圧チョッパ回路８は、スイッチング素子Ｑ１とインダクタＬ１、ダイオードＤ１、平滑コンデンサＣ１、電流検出抵抗Ｒ１を含んで構成されている。チョッパ制御回路５４によりスイッチング素子Ｑ１が高周波でオンオフすることにより、平滑コンデンサＣ１に所定の直流電圧Ｖｄｃが生成される。 (Embodiment 1)
FIG. 1 is a circuit diagram of a solid-state light source lighting device according to Embodiment 1 of the present invention. A commercial AC power supply 1 is connected to a boost chopper circuit 8 through a filter circuit FL and a full-wave rectifier DB. The step-up chopper circuit 8 includes a switching element Q1, an inductor L1, a diode D1, a smoothing capacitor C1, and a current detection resistor R1. When the switching element Q1 is turned on / off at a high frequency by the chopper control circuit 54, a predetermined DC voltage Vdc is generated in the smoothing capacitor C1.

図１の回路において、昇圧チョッパ回路８とチョッパ制御回路５４は省略しても良く、代わりに平滑コンデンサＣ１により直流電圧Ｖｄｃを生成する構成としても良い。また、図１では、電源１が商用の交流電源である場合を例示しているが、本発明は商用点灯に限定されるものではなく、電源として蓄電池などの直流電源を用いても構わない。   In the circuit of FIG. 1, the step-up chopper circuit 8 and the chopper control circuit 54 may be omitted, and instead, the DC voltage Vdc may be generated by the smoothing capacitor C1. 1 illustrates the case where the power source 1 is a commercial AC power source, the present invention is not limited to commercial lighting, and a DC power source such as a storage battery may be used as the power source.

平滑コンデンサＣ１の直流電圧Ｖｄｃは、降圧チョッパ回路３により電力変換される。降圧チョッパ回路３は、スイッチング素子Ｑ２とインダクタＬ２、ダイオードＤ２、平滑コンデンサＣ２、電流検出抵抗Ｒ２を含んで構成されている。チョッパ制御回路５３によりスイッチング素子Ｑ２が高周波でオンオフすることにより、入力直流電圧Ｖｄｃを降圧した直流電圧が平滑コンデンサＣ２に生成され、固体光源２に直流電流が供給される。固体光源２は、発光ダイオード（ＬＥＤ）や有機ＥＬ素子のような半導体発光素子である。   The DC voltage Vdc of the smoothing capacitor C1 is converted into electric power by the step-down chopper circuit 3. The step-down chopper circuit 3 includes a switching element Q2, an inductor L2, a diode D2, a smoothing capacitor C2, and a current detection resistor R2. When the switching element Q2 is turned on and off at a high frequency by the chopper control circuit 53, a DC voltage obtained by stepping down the input DC voltage Vdc is generated in the smoothing capacitor C2, and a DC current is supplied to the solid state light source 2. The solid light source 2 is a semiconductor light emitting element such as a light emitting diode (LED) or an organic EL element.

チョッパ制御回路５３はマイコン５２により制御され、調光信号に応じてスイッチング素子Ｑ２のオンパルス幅を可変とすることにより、固体光源２の光出力を調整したり、スイッチング素子Ｑ２のスイッチング動作を停止させることにより、固体光源２を消灯する制御を可能としている。   The chopper control circuit 53 is controlled by the microcomputer 52 and adjusts the light output of the solid state light source 2 or stops the switching operation of the switching element Q2 by changing the on-pulse width of the switching element Q2 according to the dimming signal. Thus, it is possible to control to turn off the solid light source 2.

本実施形態では、固体光源２に流れる直流電流を制御するためのスイッチング回路として、降圧チョッパ回路３を用いているが、フライバックコンバータ回路や昇圧チョッパ回路、昇降圧チョッパ回路など、他の構成のスイッチング回路を用いても構わない。   In this embodiment, the step-down chopper circuit 3 is used as a switching circuit for controlling the direct current flowing through the solid-state light source 2, but other configurations such as a flyback converter circuit, a step-up chopper circuit, and a step-up / step-down chopper circuit are used. A switching circuit may be used.

本実施形態の固体光源点灯装置は、例えば、商用の交流電源１に接続される照明器具に搭載されており、装置外部の調光器６から調光信号線７を介して受信される調光信号ｓに応じて固体光源２を調光点灯させる用途に用いることができる。   The solid-state light source lighting device of the present embodiment is mounted on, for example, a lighting fixture connected to a commercial AC power supply 1 and is dimmed received from a dimmer 6 outside the device via a dimming signal line 7. The solid-state light source 2 can be dimmed and turned on according to the signal s.

また、本実施形態の固体光源点灯装置を搭載した照明器具は、複数台が商用の交流電源１に並列に接続されていても構わない。その場合、各照明器具に対して共通の調光器６から並列的に調光信号ｓを供給し、フロア全体の照明器具を１つの調光器６により調光制御する照明システムを構成しても良い。   Moreover, the lighting fixture carrying the solid light source lighting device of this embodiment may be connected in parallel to the commercial AC power supply 1 in parallel. In that case, a dimming signal s is supplied in parallel from a common dimmer 6 to each luminaire, and an illuminating system for dimming and controlling the luminaires of the entire floor by one dimmer 6 is configured. Also good.

調光器６から調光信号線７を介して伝送される調光信号ｓは、例えば、周波数が約１ｋＨｚ、振幅が１０Ｖ程度の矩形波電圧信号よりなる。この矩形波電圧信号のＯＮデューティ（１周期中に占めるＨｉｇｈレベル期間の割合）は、調光レベルに応じて可変制御される。例えば、ＯＮデューティが０〜ｘ１（％）のとき、光出力は１００％（全点灯状態）となり、ｘ１〜ｘ２（％）のときは、ＯＮデューティが増加するにつれて減少する光出力となり、ｘ２〜１００（％）のとき、光出力が０％（消灯状態）となるように制御される。このような調光信号は、インバータ式の蛍光灯点灯装置の分野において広く用いられており、例えば、ｘ１＝５（％）、ｘ２＝９５（％）程度のものが知られている。   The dimming signal s transmitted from the dimmer 6 via the dimming signal line 7 is composed of, for example, a rectangular wave voltage signal having a frequency of about 1 kHz and an amplitude of about 10V. The ON duty of this rectangular wave voltage signal (the ratio of the high level period in one cycle) is variably controlled according to the dimming level. For example, when the ON duty is 0 to x1 (%), the light output is 100% (all lighting state), and when x1 to x2 (%), the light output decreases as the ON duty increases, and x2 At 100 (%), the light output is controlled to be 0% (light-off state). Such dimming signals are widely used in the field of inverter-type fluorescent lamp lighting devices, and for example, signals of about x1 = 5 (%) and x2 = 95 (%) are known.

制御回路５では、上述のＯＮデューティ可変の矩形波電圧信号（ＰＷＭ信号）よりなる調光信号ｓを、そのＯＮデューティに応じた振幅のＤＣ電圧信号に変換する信号変換回路５１を備えている。信号変換回路５１は、例えば、波形整形回路と平滑回路よりなる。調光器６から調光信号線７を介して伝送されて来た調光信号ｓを波形整形し、平滑回路により平滑化して、ＤＣ電圧信号に変換する。このＤＣ電圧信号は、マイコン５２のＡ／Ｄ変換入力端子から取り込まれてデジタル値に変換される。マイコン５２は、内蔵のメモリにデータテーブルを備えており、Ａ／Ｄ変換により取得したデジタル値に応じた光出力の制御信号をチョッパ制御回路５３に送出する。   The control circuit 5 includes a signal conversion circuit 51 that converts the dimming signal s composed of the above-described ON duty variable rectangular wave voltage signal (PWM signal) into a DC voltage signal having an amplitude corresponding to the ON duty. The signal conversion circuit 51 includes, for example, a waveform shaping circuit and a smoothing circuit. The dimming signal s transmitted from the dimmer 6 via the dimming signal line 7 is waveform-shaped, smoothed by a smoothing circuit, and converted into a DC voltage signal. This DC voltage signal is taken from the A / D conversion input terminal of the microcomputer 52 and converted into a digital value. The microcomputer 52 includes a data table in a built-in memory, and sends a light output control signal corresponding to a digital value acquired by A / D conversion to the chopper control circuit 53.

電源ＯＮ／ＯＦＦ検出回路４は、商用の交流電源１のＯＮ／ＯＦＦを検出して、電源ＯＮ／ＯＦＦ検出信号を生成し、制御回路５のマイコン５２に入力している。電源ＯＮ／ＯＦＦ検出回路４は、交流電源１の電圧がゼロクロスしただけでは、電源ＯＦＦとは判断しない。交流電源１の電圧が、例えば、数サイクル〜十数サイクルにわたり低い状態が継続した場合に、電源ＯＦＦと判断し、電源ＯＮ／ＯＦＦ検出信号の状態を切り替える。   The power supply ON / OFF detection circuit 4 detects the ON / OFF of the commercial AC power supply 1, generates a power supply ON / OFF detection signal, and inputs it to the microcomputer 52 of the control circuit 5. The power supply ON / OFF detection circuit 4 does not determine that the power supply is OFF only when the voltage of the AC power supply 1 crosses zero. For example, when the voltage of the AC power supply 1 remains low for several cycles to several tens of cycles, it is determined that the power is off, and the state of the power on / off detection signal is switched.

制御電源回路９は、平滑コンデンサＣ１の直流電圧Ｖｄｃから制御電源電圧Ｖｃｃを生成し、制御回路５並びに電源ＯＮ／ＯＦＦ検出回路４に供給する。交流電源１がＯＦＦされて、電源ＯＮ／ＯＦＦ検出信号が電源ＯＦＦを検出している状態に切り替わったとしても、平滑コンデンサＣ１の直流電圧Ｖｄｃが残っている間は、制御電源電圧Ｖｃｃが供給されており、制御回路５並びに電源ＯＮ／ＯＦＦ検出回路４は動作可能である。   The control power supply circuit 9 generates a control power supply voltage Vcc from the DC voltage Vdc of the smoothing capacitor C1 and supplies it to the control circuit 5 and the power supply ON / OFF detection circuit 4. Even if the AC power source 1 is turned off and the power source ON / OFF detection signal is switched to the state where the power source OFF is detected, the control power source voltage Vcc is supplied while the DC voltage Vdc of the smoothing capacitor C1 remains. The control circuit 5 and the power ON / OFF detection circuit 4 are operable.

調光器６は、同じ交流電源１から電力供給を受けており、交流電源１がＯＦＦすると、調光信号ｓの出力を停止する。ただし、調光器６も内部に制御電源回路を有しているので、図２〜図４に示すように、交流電源１がＯＦＦした後、少しの時間遅れを経てから、調光信号が消失する。また、交流電源１がＯＮした後、少しの時間遅れを経てから、調光信号が発生する。   The dimmer 6 receives power supply from the same AC power source 1 and stops the output of the dimming signal s when the AC power source 1 is turned off. However, since the dimmer 6 also has a control power supply circuit inside, as shown in FIGS. 2 to 4, the dimming signal disappears after a short delay after the AC power supply 1 is turned off. To do. Further, after the AC power supply 1 is turned on, a dimming signal is generated after a slight delay.

図２は本発明の対策前の従来例の電源ＯＮ時と電源ＯＦＦ時の動作を示している。電源ＯＮ前は固体光源２は消灯されており、光出力は０％である。また、調光信号は発生していない。   FIG. 2 shows the operation at the time of power-on and power-off of the conventional example before the countermeasure of the present invention. Before the power is turned on, the solid light source 2 is turned off and the light output is 0%. Further, no dimming signal is generated.

ｔ１のタイミングで電源１がＯＮされると、同じ電源１に接続された調光器６からは、所定時間（例えば１秒程度の短時間）の経過後に、調光信号が発生する。
ｔ２のタイミングで調光信号が発生した後は、その調光信号により指定される調光レベルに応じた光出力で固体光源２が点灯される。
ｔ３のタイミングで電源１がＯＦＦされると、マイコン５２は電源ＯＦＦの検出信号を受けて、固体光源２を直ちに消灯するように制御する。 When the power source 1 is turned on at the timing t1, a dimming signal is generated from a dimmer 6 connected to the same power source 1 after a predetermined time (for example, a short time of about 1 second).
After the dimming signal is generated at the timing t2, the solid state light source 2 is turned on with an optical output corresponding to the dimming level specified by the dimming signal.
When the power source 1 is turned off at the timing t3, the microcomputer 52 receives the power source OFF detection signal and controls the solid light source 2 to be turned off immediately.

ここで、問題となるのは、ｔ１〜ｔ２の期間における光出力である。ｔ１のタイミングで電源ＯＮが検出された後、ｔ２のタイミングで調光信号が発生するまでの間は、調光信号のＯＮデューティは０％となるので、固体光源２の光出力は１００％からスタートすることになる。したがって、例えば、ユーザーが調光器６の調光つまみを絞った状態（光出力を低く設定した状態）で電源ＯＮの操作をした場合でも、電源ＯＮから所定の短時間は１００％の光出力が生じてしまう。   Here, the problem is the light output in the period from t1 to t2. Since the ON duty of the dimming signal is 0% until the dimming signal is generated at the timing of t2 after the power ON is detected at the timing of t1, the light output of the solid state light source 2 is from 100%. Will start. Therefore, for example, even when the user turns on the power with the dimming knob of the dimmer 6 turned down (with the light output set to a low value), the light output is 100% for a predetermined short time after the power is turned on. Will occur.

従来のインバータ式の蛍光灯点灯装置であれば、電源投入後、例えば１秒程度はフィラメントの予熱期間が設定されているので、上述のように、電源ＯＮから所定の短時間は１００％の光出力に設定されていても差し支えない。むしろ調光状態でスタートするよりも全点灯状態でスタートする方が熱陰極型の放電灯の寿命の点では好ましいとさえ言える。このような観点から、従来のインバータ式の蛍光灯点灯装置に適合するように設計された調光器（いわゆるライコン）では、電源ＯＮが検出されてから、蛍光灯の予熱時間に相当する程度の短時間は調光信号を出力しない（ＯＮデューティを０％とする）仕様となっていることが一般的である。   In the case of a conventional inverter type fluorescent lamp lighting device, since the filament preheating period is set, for example, for about 1 second after the power is turned on, as described above, 100% light is supplied for a predetermined short time after the power is turned on. It can be set to output. Rather, it can be said that it is more preferable in terms of the life of the hot cathode type discharge lamp to start in the full lighting state than in the dimming state. From this point of view, a dimmer (so-called lycon) designed to be compatible with a conventional inverter-type fluorescent lamp lighting device has a degree corresponding to the preheating time of the fluorescent lamp after the power ON is detected. In general, the specification is such that the dimming signal is not output for a short time (ON duty is 0%).

しかしながら、ＬＥＤの調光点灯装置では、熱陰極型の放電灯のような起動時の予熱期間は不要であるので、電源ＯＮの直後から調光信号により指定される調光レベルに応じた光出力で固体光源２を点灯可能である。このため、調光状態で電源ＯＮすると、一瞬、光源が明るく点灯される現象（いわゆる“オンピカ”）が発生する。同様の現象は、電源１が瞬時停電した場合や瞬時降下した場合にも、起こり得る。   However, since the LED dimming / lighting device does not require a preheating period at start-up, unlike a hot cathode discharge lamp, the light output corresponding to the dimming level specified by the dimming signal immediately after the power is turned on. The solid light source 2 can be turned on. For this reason, when the power is turned on in the dimming state, a phenomenon that the light source is brightly lit (so-called “on-pica”) occurs for a moment. A similar phenomenon can occur when the power source 1 is momentarily interrupted or falls.

図３は本発明の対策前の従来例の電源瞬断時の動作を示している。
ｔ３のタイミングで電源のＯＦＦが検出されると、マイコン５２は電源ＯＦＦの検出信号を受けて、固体光源２を直ちに消灯するように制御する。
その後、ｔ４のタイミングで復電すると、マイコン５２は電源ＯＮの検出信号を受けて、固体光源２を調光信号の調光レベルに応じた光出力で点灯させる。 FIG. 3 shows the operation at the time of instantaneous power interruption of the conventional example before the countermeasure of the present invention.
When power OFF is detected at the timing t3, the microcomputer 52 receives the power OFF detection signal and controls the solid light source 2 to be turned off immediately.
Thereafter, when power is restored at timing t4, the microcomputer 52 receives the power ON detection signal and turns on the solid-state light source 2 with a light output corresponding to the dimming level of the dimming signal.

次に、ｔ５のタイミングで調光器６の調光信号のＯＮデューティが０％になると、光出力は１００％となる。
その後、ｔ６のタイミングで調光信号が発生した後は、その調光信号により指定される調光レベルに応じた光出力で固体光源２が点灯される。 Next, when the ON duty of the dimming signal of the dimmer 6 becomes 0% at the timing of t5, the optical output becomes 100%.
Thereafter, after the dimming signal is generated at timing t6, the solid-state light source 2 is turned on with an optical output corresponding to the dimming level specified by the dimming signal.

ここで、問題となるのは、ｔ５〜ｔ６の期間における光出力である。ｔ５のタイミングで調光信号が消失した後、ｔ６のタイミングで調光信号が発生するまでの間は、調光信号のＯＮデューティは０％となるので、固体光源２の光出力は１００％となる。このため、調光状態で電源１が瞬時停電すると、復電に一瞬、光源が明るく点灯される現象が発生する。   Here, the problem is the light output in the period from t5 to t6. After the dimming signal disappears at the timing of t5, until the dimming signal is generated at the timing of t6, the ON duty of the dimming signal is 0%, so the light output of the solid state light source 2 is 100%. Become. For this reason, when the power source 1 instantaneously fails in the dimming state, a phenomenon occurs in which the light source is lit brightly for a moment during power recovery.

これらの問題を解決するために、本発明では、図４に示すように、電源ＯＦＦが検出された後、所定期間Ｔが経過するまでは、外部信号を受け付けないように制御している。   In order to solve these problems, in the present invention, as shown in FIG. 4, control is performed so that an external signal is not accepted until a predetermined period T elapses after power OFF is detected.

このように制御すれば、電源がＯＦＦされた後、所定期間Ｔの間に復電した場合でも、過渡的な調光信号の影響を受けることは無くなる。   By controlling in this way, even if the power is restored for a predetermined period T after the power is turned off, it is not affected by the transient dimming signal.

（制御例１）
１つの制御例として、図４に示すように、電源ＯＦＦが検出された後、所定期間Ｔが経過するまでは、固体光源２を消灯させるように制御する。このように制御すれば、調光状態で点灯しているときに、電源が瞬時停電した後に、すぐに復電したような場合であっても、一時的に１００％の点灯状態に移行するような不都合は生じない。 (Control example 1)
As an example of control, as shown in FIG. 4, control is performed so that the solid-state light source 2 is turned off until a predetermined period T elapses after power OFF is detected. By controlling in this way, even when the power is turned off immediately after a momentary power failure when it is lit in the dimming state, it will temporarily shift to a 100% lighting state. There is no inconvenience.

（制御例２）
他の制御例として、図４に示すように、電源ＯＦＦが検出された後、所定期間Ｔが経過するまでは、固体光源２を所定の光出力で調光点灯させるように制御する。所定の光出力は、ユーザーが眩しさを感じない程度の調光レベルに設定しておけば、ユーザーが不快感を感じることは無い。 (Control example 2)
As another control example, as shown in FIG. 4, the control is performed so that the solid-state light source 2 is dimmed with a predetermined light output until a predetermined period T elapses after power OFF is detected. If the predetermined light output is set to a dimming level at which the user does not feel dazzling, the user will not feel uncomfortable.

また、所定期間Ｔの間、消灯させる制御例１に比べると、本制御例２では、所定期間Ｔの間も、最低限の明るさは確保されるので、特に夜間の照明制御において、ユーザーの不安感を解消することができる。   Further, compared to the control example 1 in which the light is turned off during the predetermined period T, in the present control example 2, the minimum brightness is ensured even during the predetermined period T. Anxiety can be resolved.

（制御例３）
別の制御例として、図４に示すように、電源ＯＦＦが検出された後、電源ＯＮが検出されるまでは、固体光源２を消灯し、その後、電源ＯＮが検出されると、電源ＯＦＦの検出から所定期間Ｔが経過するまでは、固体光源２を所定の光出力で調光点灯させるように制御する。 (Control example 3)
As another control example, as shown in FIG. 4, after the power OFF is detected, the solid light source 2 is turned off until the power ON is detected, and then the power OFF is detected when the power ON is detected. Until the predetermined period T elapses from the detection, the solid-state light source 2 is controlled to be dimmed with a predetermined light output.

このように制御すれば、電源ＯＦＦの操作に対して、速やかに固体光源２が消灯するから、点灯装置の応答が遅いという誤解を招く恐れが無く、ユーザーの信頼感を損なうことが無い。また、電源ＯＮが検出された後は、所定の光出力で調光点灯するから、特に夜間の照明制御において、ユーザーの不安感を解消することができる。   By controlling in this way, the solid-state light source 2 is quickly turned off in response to an operation of turning off the power. Therefore, there is no possibility of causing a misunderstanding that the response of the lighting device is slow, and the user's reliability is not impaired. In addition, after the power ON is detected, dimming is performed with a predetermined light output, so that the user's anxiety can be solved particularly in the illumination control at night.

（制御例４）
さらに、上述の制御例３において、電源ＯＦＦが検出されたときに、そのときの調光状態をマイコン５２の記憶部に一時的に記憶しておいて、その後、所定期間Ｔが経過する前に電源ＯＮが検出されたときには、その所定期間Ｔが経過するまでは、マイコン５２の記憶部に記憶された直近の電源ＯＦＦ時の調光状態で調光点灯させるように制御する。そして、所定期間Ｔが経過した後は、調光信号により指定される調光レベルに応じた光出力で固体光源２を点灯させる。 (Control example 4)
Furthermore, in the above-described control example 3, when power OFF is detected, the dimming state at that time is temporarily stored in the storage unit of the microcomputer 52, and then after the predetermined period T has elapsed. When power ON is detected, control is performed so that the dimming is performed in the dimming state at the time of the most recent power OFF stored in the storage unit of the microcomputer 52 until the predetermined period T elapses. Then, after the predetermined period T has elapsed, the solid-state light source 2 is turned on with an optical output corresponding to the dimming level specified by the dimming signal.

このように制御すれば、電源ＯＦＦの操作に対して、速やかに固体光源２が消灯するから、ユーザーの信頼感を損なうことが無く、なおかつ、電源瞬断後の復電時には、他の調光状態を経由することなく、元の調光状態に即座に復帰させることができる。   By controlling in this way, the solid-state light source 2 is quickly turned off in response to a power-off operation, so that the user's reliability is not impaired, and other dimming is performed at the time of power recovery after a momentary power interruption. It is possible to immediately return to the original dimming state without going through the state.

上述の特許文献１（特許第４，６３６，１０２号公報）の技術では、電源ＯＮのタイミングから所定期間の間は、ＬＥＤを予め定められた調光で減光して点灯或いは消灯させるように制御するので、電源がＯＦＦされる直前の調光状態を電源がＯＮされた直後の制御に反映させることは出来なかった。これに対して、本制御例４であれば、電源がＯＦＦされる直前の調光状態を電源がＯＮされた直後の制御に反映させることが出来るから、電源瞬断の前後で調光レベルの連続性を確保できる効果があり、ユーザーの快適性を高めることができる。   In the technique of the above-mentioned Patent Document 1 (Japanese Patent No. 4,636,102), the LED is dimmed by a predetermined dimming to be turned on or off for a predetermined period from the power-on timing. Therefore, the dimming state immediately before the power is turned off cannot be reflected in the control immediately after the power is turned on. On the other hand, in this control example 4, the dimming state immediately before the power is turned off can be reflected in the control immediately after the power is turned on. This has the effect of ensuring continuity and can enhance the user's comfort.

１ 電源
２ 固体光源
３ 降圧チョッパ回路（スイッチング回路）
４ 電源ＯＮ／ＯＦＦ検出回路
５ 制御回路 1 power supply 2 solid state light source 3 step-down chopper circuit (switching circuit)
4 Power ON / OFF detection circuit 5 Control circuit

Claims (5)

電源と固体光源との間に接続される少なくとも１つのスイッチング回路と、電源の降下または遮断を検出する回路と、外部信号に応じて前記スイッチング回路を制御し、固体光源を調光することが可能な制御回路を備えた固体光源点灯装置であって、電源の降下または遮断を検出した後、所定期間、外部信号を受け付けないことを特徴とする固体光源点灯装置。 At least one switching circuit connected between the power source and the solid-state light source, a circuit for detecting a drop or interruption of the power source, and controlling the switching circuit according to an external signal, can control the solid-state light source A solid-state light source lighting device including a control circuit, wherein an external signal is not received for a predetermined period after detecting a power supply drop or interruption. 前記所定期間の間、固体光源を消灯もしくは所定の調光状態で点灯することを特徴とする請求項１記載の固体光源点灯装置。 The solid light source lighting device according to claim 1, wherein the solid light source is turned off or turned on in a predetermined dimming state during the predetermined period. 電源の降下または遮断を検出したときの調光状態を記憶しておく記憶部を備え、前記所定の調光状態として、前記記憶部に記憶された調光状態を設定することを特徴とする請求項２記載の固体光源点灯装置。 A storage unit that stores a dimming state when a power supply drop or shut-off is detected is provided, and the dimming state stored in the storage unit is set as the predetermined dimming state. Item 3. A solid light source lighting device according to Item 2. 請求項１〜３のいずれかに記載の固体光源点灯装置を搭載する照明器具。 The lighting fixture which mounts the solid light source lighting device in any one of Claims 1-3. 請求項１〜３のいずれかに記載の固体光源点灯装置を搭載する照明システム。 The illumination system which mounts the solid light source lighting device in any one of Claims 1-3.
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