JP5954649B2

JP5954649B2 - Lighting device and lighting fixture

Info

Publication number: JP5954649B2
Application number: JP2011110403A
Authority: JP
Inventors: 密島　康一; 康一密島; 辻村　充弘; 充弘辻村; 万波　寛明; 寛明万波; 勝義仁保
Original assignee: Panasonic Intellectual Property Management Co Ltd
Current assignee: Panasonic Intellectual Property Management Co Ltd
Priority date: 2011-05-17
Filing date: 2011-05-17
Publication date: 2016-07-20
Anticipated expiration: 2031-05-17
Also published as: JP2012243456A

Description

本発明は、発光ダイオード(ＬＥＤ)を光源とする照明装置、及び当該照明装置を用いた照明器具に関する。 The present invention relates to a lighting device using a light emitting diode (LED) as a light source, and a lighting fixture using the lighting device.

近年、白熱ランプや蛍光ランプに代えて発光ダイオード(ＬＥＤ)を光源とする照明装置や照明器具が普及してきている。 In recent years, lighting devices and lighting fixtures using light emitting diodes (LEDs) as light sources instead of incandescent lamps and fluorescent lamps have become widespread.

例えば、特許文献１には、複数個の発光ダイオードが直列接続された発光部と、商用交流電源から供給される電圧・電流を整流する電源整流部と、電源整流部の脈流出力を所望の電圧に変換して発光部に供給するスイッチング電源部とを備えたＬＥＤ照明装置が記載されている。この従来装置では、スイッチング電源部が降圧チョッパ回路で構成され、降圧チョッパ回路の動作を周期的にオン・オフするとともにオン期間を増減することで発光部から放射される光量を調整(調光)している。 For example, in Patent Document 1, a light emitting unit in which a plurality of light emitting diodes are connected in series, a power rectifying unit that rectifies a voltage / current supplied from a commercial AC power source, and a pulsating output of the power rectifying unit are desired. An LED illumination device is described that includes a switching power supply unit that converts the voltage into a light-emitting unit. In this conventional device, the switching power supply unit is composed of a step-down chopper circuit, and the amount of light emitted from the light emitting unit is adjusted (dimming) by periodically turning on / off the operation of the step-down chopper circuit and increasing / decreasing the ON period. doing.

特開２０１０−１９８７６０号公報JP 2010-198760 A

ところで、降圧チョッパ回路には電解コンデンサからなる平滑コンデンサが用いられているが、一般的に、降圧チョッパ回路の寿命は電解コンデンサの劣化状態で決まることが多い。電解コンデンサは、通常、導通状態で高温度環境下に長時間放置された場合よりも、非導通状態で高温度環境下に長時間放置された場合の方が寿命が短くなる傾向にある。 By the way, a smoothing capacitor made of an electrolytic capacitor is used in the step-down chopper circuit. In general, the life of the step-down chopper circuit is often determined by the deterioration state of the electrolytic capacitor. Electrolytic capacitors generally tend to have a shorter life when left in a high temperature environment in a non-conductive state for a long time than when left in a high temperature environment in a conductive state.

例えば、従来のＬＥＤ照明装置において、複数の光源部と各光源部に直流電力を供給する複数のスイッチング電源部が設けられ、これら複数の光源部のうちの一部のみが間引き点灯される場合がある。この場合、光源部を点灯させていないスイッチング電源部においては、電解コンデンサからなる平滑コンデンサが非導通状態で高温度環境下に放置される可能性が高いため、平滑コンデンサが短寿命になりやすいという問題があった。 For example, in a conventional LED lighting device, a plurality of light source units and a plurality of switching power supply units that supply DC power to each light source unit may be provided, and only a part of the plurality of light source units may be thinned and lit. is there. In this case, in the switching power supply unit in which the light source unit is not turned on, the smoothing capacitor made of an electrolytic capacitor is likely to be left in a high temperature environment in a non-conductive state, so that the smoothing capacitor tends to have a short life. There was a problem.

本発明は、上記課題に鑑みて為されたものであり、電解コンデンサの劣化を抑えて長寿命化を図ることを目的とする。 The present invention has been made in view of the above problems, and an object of the present invention is to extend the life of the electrolytic capacitor by suppressing deterioration.

本発明の照明装置は、それぞれが１乃至複数個の発光ダイオードを有する複数の光源部と、前記各光源部に個別に給電して点灯させる複数の点灯回路部と、複数の前記点灯回路部を制御して複数の前記光源部の光出力を調整する制御部とを備え、複数の前記点灯回路部は、出力段に平滑用の電解コンデンサを有するスイッチング電源回路をそれぞれ有し、複数の前記光源部は互いに光色が異なり、前記制御部は、それぞれの前記点灯回路部のスイッチング電源回路を間欠動作させ且つ間欠動作の周期に対する動作期間のデューティ比を１００％から０％の範囲で増減することによって前記光源部の光出力を調整する照明装置において、前記制御部は、全ての前記光源部を消灯させる場合を除いて、光色の異なる複数の前記光源部の光出力の割合を調整して調色する際の、それぞれの前記各点灯回路部のスイッチング電源回路のデューティ比を、０％よりも大きい所定の下限値から１００％の範囲で増減することを特徴とする。 The lighting device according to the present invention includes a plurality of light source units each having one to a plurality of light emitting diodes, a plurality of lighting circuit units that individually supply power to each light source unit for lighting, and a plurality of the lighting circuit units. A control unit that controls and adjusts the light output of the plurality of light source units, and the plurality of lighting circuit units each include a switching power supply circuit having a smoothing electrolytic capacitor in an output stage, and the plurality of light sources The sections are different in light color, and the control section operates the switching power supply circuit of each lighting circuit section intermittently and increases or decreases the duty ratio of the operation period with respect to the cycle of the intermittent operation in the range of 100% to 0%. a lighting device for adjusting the light output of the light source unit by the control unit, except when to turn off all of the light source unit, the light outputs of the plurality of the light source unit of different light colors split The in adjusting to toning, the duty ratio of the switching power supply circuit of each of the respective lighting circuit unit, characterized in that it increases or decreases in the range from a predetermined lower limit value is greater than 0% to 100%.

この照明装置において、前記制御部は、光色の異なる複数の前記光源部の光出力の割合を調整して調色し、所定の調色比に保ちつつ調光を行う場合、前記調色比を一定に保つことができなくとも前記各点灯回路部の前記スイッチング電源回路のデューティー比を０％よりも大きい所定の下限値から１００％の範囲で増減することが好ましい。 In this illumination device, the control unit adjusts the ratio of the light output of the plurality of light source units having different light colors, and performs the light adjustment while maintaining a predetermined toning ratio. It is preferable to increase or decrease the duty ratio of the switching power supply circuit of each of the lighting circuit sections within a range of 100% from a predetermined lower limit value greater than 0% even if the constant current cannot be kept constant .

本発明の照明器具は、前記何れかの照明装置と、当該照明装置を保持する器具本体とを備えることを特徴とする。 The lighting fixture of the present invention includes any one of the lighting devices and a fixture main body that holds the lighting device.

本発明の照明装置及び照明器具は、電解コンデンサの劣化を抑えて長寿命化を図ることができるという効果がある。 The lighting device and the lighting fixture of the present invention have an effect that it is possible to extend the life by suppressing deterioration of the electrolytic capacitor.

本発明に係る照明装置の実施形態を示し、(ａ)はブロック図、(ｂ)は点灯回路部の回路構成図である。Embodiment of the illuminating device which concerns on this invention is shown, (a) is a block diagram, (b) is a circuit block diagram of a lighting circuit part. (ａ)〜(ｃ)は同上における制御部の動作を説明するための波形図である。(a)-(c) is a wave form diagram for demonstrating operation | movement of the control part in the same as the above. 同上における制御部の動作を説明するための説明図である。It is explanatory drawing for demonstrating operation | movement of the control part in the same as the above. 本発明に係る照明器具の実施形態を示す分解斜視図である。It is a disassembled perspective view which shows embodiment of the lighting fixture which concerns on this invention. 同上の断面図である。It is sectional drawing same as the above.

以下、本発明に係る照明装置及び照明器具の実施形態について、図面を参照して詳細に説明する。 Hereinafter, embodiments of a lighting device and a lighting fixture according to the present invention will be described in detail with reference to the drawings.

本実施形態の照明装置は、図１(ａ)に示すように２つの光源部１，２、２つの点灯回路部３，４、制御部５、力率改善回路６などを備えている。一方の光源部(以下、第１光源部と呼ぶ。)１は、白色光を放射する１乃至複数個の発光ダイオードの直列回路を有している。また、他方の光源部(以下、第２光源部と呼ぶ。)２は、電球色の光を放射する１乃至複数個の発光ダイオードの直列回路を有している。これらの光源部１，２は、各発光ダイオードの順電圧に個数を乗じた電圧(以下、駆動電圧と呼ぶ。)が印加されることで電流が流れて発光(点灯)する。 As shown in FIG. 1A, the lighting device of the present embodiment includes two light source units 1, 2, two lighting circuit units 3, 4, a control unit 5, a power factor correction circuit 6, and the like. One light source unit (hereinafter referred to as a first light source unit) 1 has a series circuit of one or more light emitting diodes that emit white light. The other light source unit (hereinafter referred to as a second light source unit) 2 has a series circuit of one or more light emitting diodes that emit light bulb light. The light sources 1 and 2 emit light (lights up) when a current flows by applying a voltage obtained by multiplying the forward voltage of each light emitting diode by the number (hereinafter referred to as drive voltage).

力率改善回路６は従来周知の昇圧チョッパ回路からなり、商用の交流電源100から供給される交流電圧よりも高い直流電圧を出力する。一方の点灯回路部(以下、第１点灯回路部と呼ぶ。)３は、力率改善回路６から出力される直流電圧を所望の直流電圧(第１光源部１の駆動電圧)まで降圧するスイッチング電源回路を有している。同様に、他方の点灯回路部(以下、第２点灯回路部と呼ぶ。)４は、力率改善回路６から出力される直流電圧を所望の直流電圧(第２光源部２の駆動電圧)まで降圧するスイッチング電源回路を有している。 The power factor correction circuit 6 is a conventionally known step-up chopper circuit, and outputs a DC voltage higher than the AC voltage supplied from the commercial AC power supply 100. One lighting circuit unit (hereinafter referred to as a first lighting circuit unit) 3 is a switching unit that steps down the DC voltage output from the power factor correction circuit 6 to a desired DC voltage (driving voltage of the first light source unit 1). It has a power supply circuit. Similarly, the other lighting circuit unit (hereinafter referred to as a second lighting circuit unit) 4 converts the DC voltage output from the power factor correction circuit 6 to a desired DC voltage (driving voltage of the second light source unit 2). It has a switching power supply circuit that steps down.

第１点灯回路部３及び第２点灯回路部４は、図１(ｂ)に示すように降圧チョッパ回路と、降圧チョッパ回路を駆動する駆動回路30，40とで構成される。降圧チョッパ回路は従来周知であって、力率改善回路６の正極側の出力端子にダイオードD1のカソードが接続され、ダイオードD1のアノードと力率改善回路６の負極側の出力端子との間にスイッチング素子Q1及び抵抗R1の直列回路が挿入される。また、ダイオードD1のカソード・アノード間に、電解コンデンサからなる平滑コンデンサC1及びインダクタL1が直列に接続され、平滑コンデンサC1の両端に放電用の抵抗R2が接続される。なお、光源部１，２の各発光ダイオードＬＥＤが平滑コンデンサC1の両端間に直列に接続される。このように構成される降圧チョッパ回路の動作は従来周知であって、スイッチング素子Q1が高周波でスイッチングされることにより、入力電圧(力率改善回路６の出力電圧)から降圧された直流電圧が平滑コンデンサC1の両端より光源部１，２に出力される。また駆動回路30，40は、制御部５から与えられる制御信号に応じてスイッチング素子Q1をスイッチングするものである。 As shown in FIG. 1B, the first lighting circuit unit 3 and the second lighting circuit unit 4 include a step-down chopper circuit and drive circuits 30 and 40 that drive the step-down chopper circuit. The step-down chopper circuit is well known in the art, and the cathode of the diode D1 is connected to the positive output terminal of the power factor correction circuit 6, and between the anode of the diode D1 and the negative output terminal of the power factor improvement circuit 6. A series circuit of the switching element Q1 and the resistor R1 is inserted. A smoothing capacitor C1 made of an electrolytic capacitor and an inductor L1 are connected in series between the cathode and anode of the diode D1, and a discharging resistor R2 is connected to both ends of the smoothing capacitor C1. The light emitting diodes LED of the light source units 1 and 2 are connected in series between both ends of the smoothing capacitor C1. The operation of the step-down chopper circuit configured in this way is well known in the art, and the DC voltage stepped down from the input voltage (the output voltage of the power factor correction circuit 6) is smoothed by switching the switching element Q1 at a high frequency. The light is output to the light source units 1 and 2 from both ends of the capacitor C1. The drive circuits 30 and 40 switch the switching element Q1 in accordance with a control signal given from the control unit 5.

制御部５は、マイクロコンピュータ及びROMやRAM等のメモリなどのハードウェアと、ROMに保存されてマイクロコンピュータで実行されるプログラム(ソフトウェア)とで構成されている。そして、以下に説明する制御部５の動作(処理)は、マイクロコンピュータがプログラムを実行することで実現される。なお、制御部５の動作電源は、図示しない電源回路が力率改善回路６の出力電圧から作成して供給される。 The control unit 5 includes a microcomputer and hardware such as a memory such as a ROM and a RAM, and a program (software) stored in the ROM and executed by the microcomputer. And the operation | movement (process) of the control part 5 demonstrated below is implement | achieved when a microcomputer runs a program. The operating power supply of the control unit 5 is supplied from a power circuit (not shown) created from the output voltage of the power factor correction circuit 6.

ここで、制御部５は、点灯回路部３，４のスイッチング電源回路を間欠動作させ且つ間欠動作の周期T0に対する動作期間(オン期間)T1のデューティ比(＝T1/T0×100)を100％から０％の範囲で増減することによって光源部１，２の光出力を調整(調光)することができる(図２参照)。つまり、図２(ｂ)に示すようにデューティ比が高くなるほど光源部１，２の光出力が増加し、図２(ｃ)に示すようにデューティ比が低くなるほど光源部１，２の光出力が減少する。そして、図２(ａ)に示すようにデューティ比が100％の場合はスイッチング電源回路が常時動作して光源部１，２が定格点灯し、デューティ比が０％の場合はスイッチング電源回路が常時停止して光源部１，２が消灯する。なお、以下の説明では、上述したデューティ比を調光比と呼ぶ。 Here, the control unit 5 operates the switching power supply circuits of the lighting circuit units 3 and 4 intermittently and sets the duty ratio (= T1 / T0 × 100) of the operation period (ON period) T1 to the cycle T0 of the intermittent operation to 100%. The light output of the light source units 1 and 2 can be adjusted (dimmed) by increasing / decreasing within a range of 0% from (see FIG. 2). That is, the light output of the light source units 1 and 2 increases as the duty ratio increases as shown in FIG. 2B, and the light output of the light source units 1 and 2 decreases as the duty ratio decreases as shown in FIG. Decrease. As shown in FIG. 2 (a), when the duty ratio is 100%, the switching power supply circuit is always operated and the light source units 1 and 2 are lit at rated power. When the duty ratio is 0%, the switching power supply circuit is always operated. The light source units 1 and 2 are turned off. In the following description, the above-described duty ratio is referred to as a dimming ratio.

また、本実施形態では第１光源部１の発光色(白色)と第２光源部２の発光色(電球色)が異なっている。したがって、制御部５が第１光源部１の光出力(調光比)と第２光源部２の光出力(調光比)との割合を変化させることにより、第１光源部１及び第２光源部２から照明空間に照射される光の色を調整(調色)することができる(図３参照)。つまり、第１光源部１の光出力(調光比)の割合が高くなるほど光色が白色に近くなり、第２光源部２の光出力(調光比)の割合が高くなるほど光色が電球色に近くなる。そして、第１光源部１の調光比が０％よりも高く且つ第２光源部２の調光比が０％の場合は、光色が白色となり、第１光源部１の調光比が０％且つ第２光源部２の調光比が０％よりも高い場合は、光色が電球色となる。なお、以下の説明では、第１光源部１の調光比と第２光源部２の調光比との割合(比率)を調色比と呼ぶ。 In the present embodiment, the emission color (white) of the first light source unit 1 and the emission color (bulb color) of the second light source unit 2 are different. Therefore, the control unit 5 changes the ratio between the light output (dimming ratio) of the first light source unit 1 and the light output (dimming ratio) of the second light source unit 2 to thereby change the first light source unit 1 and the second light source unit 2. The color of light emitted from the light source unit 2 to the illumination space can be adjusted (toned) (see FIG. 3). That is, the light color becomes closer to white as the ratio of the light output (dimming ratio) of the first light source unit 1 becomes higher, and the light color becomes lighter as the ratio of the light output (dimming ratio) of the second light source unit 2 becomes higher. Close to color. When the dimming ratio of the first light source unit 1 is higher than 0% and the dimming ratio of the second light source unit 2 is 0%, the light color is white, and the dimming ratio of the first light source unit 1 is When 0% and the dimming ratio of the second light source unit 2 is higher than 0%, the light color is the light bulb color. In the following description, a ratio (ratio) between the dimming ratio of the first light source unit 1 and the dimming ratio of the second light source unit 2 is referred to as a toning ratio.

ところで、第１光源部１と第２光源部２がそれぞれ100％の調光比で定格点灯されると光出力が大きくなり過ぎる。そこで、第１光源部１の調光比と第２光源部２の調光比との総和が100％となるように、制御部５が各光源部１，２の調光比を調整することが好ましい。なお、以下の説明では、第１光源部１の調光比と第２光源部２の調光比の総和を全調光比と呼ぶ。 By the way, if the 1st light source part 1 and the 2nd light source part 2 are rated lighting by 100% of light control ratio, respectively, a light output will become large too much. Therefore, the control unit 5 adjusts the dimming ratios of the light source units 1 and 2 so that the sum of the dimming ratio of the first light source unit 1 and the dimming ratio of the second light source unit 2 becomes 100%. Is preferred. In the following description, the sum of the dimming ratio of the first light source unit 1 and the dimming ratio of the second light source unit 2 is referred to as the total dimming ratio.

ここで、制御部５は、図示しないワイヤレスリモコンから送信されるコントロール信号(赤外線信号)を受信し、受信したコントロール信号に応じて全調光比及び調色比を変化させる。ワイヤレスリモコンは、全調光比を増減させるためのスイッチ、調色比を変更させるためのスイッチなどを有し、これらのスイッチが操作されたときに全調光比の増減や調色比の変化を指示するコントロール信号を送信する。例えば、制御部５は、全調光比の増加を指示するコントロール信号を受け取ると各光源部１，２の調光比を増加させ、全調光比の減少を指示するコントロール信号を受け取ると各光源部１，２の調光比を減少させる。また、制御部５は、調色比の変更を指示するコントロール信号を受け取ると各光源部１，２の調光比の割合を調整して調色比を変更する。ただし、制御部５は、全調光比を変更する際、図３に示すように調色比を一定(図示例では、電球色：白色＝19：1)に保った状態で第１光源部１の調光比と第２光源部２の調光比の少なくとも何れか一方を増減する。同様に、制御部５は調色比を変更する際、全調光比を一定に保った状態で第１光源部の調光比と第２光源部２の調光比の少なくとも何れか一方を増減する。これにより、光色を変化させずに明るさ(全調光比)のみを調整したり、明るさ(全調光比)を変化させずに光色(調色比)のみを調整することができる。 Here, the control unit 5 receives a control signal (infrared signal) transmitted from a wireless remote controller (not shown), and changes the total dimming ratio and the toning ratio according to the received control signal. The wireless remote control has a switch for increasing / decreasing the total dimming ratio, a switch for changing the toning ratio, etc., and when these switches are operated, the total dimming ratio increases / decreases and the toning ratio changes Send a control signal to indicate For example, when the control unit 5 receives a control signal instructing an increase in the total dimming ratio, the control unit 5 increases the dimming ratio of each of the light source units 1 and 2 and receives a control signal instructing a decrease in the total dimming ratio. The dimming ratio of the light sources 1 and 2 is reduced. In addition, when the control unit 5 receives a control signal instructing to change the toning ratio, the control unit 5 adjusts the ratio of the dimming ratios of the light source units 1 and 2 to change the toning ratio. However, when changing the total dimming ratio, the control unit 5 keeps the toning ratio constant as shown in FIG. 3 (in the illustrated example, the light bulb color: white color = 19: 1) while maintaining the first light source unit. At least one of the dimming ratio of 1 and the dimming ratio of the second light source unit 2 is increased or decreased. Similarly, when changing the toning ratio, the control unit 5 changes at least one of the dimming ratio of the first light source unit and the dimming ratio of the second light source unit 2 while keeping the total dimming ratio constant. Increase or decrease. This makes it possible to adjust only the brightness (total light control ratio) without changing the light color, or to adjust only the light color (color control ratio) without changing the brightness (total light control ratio). it can.

ところで、従来技術で説明したように、降圧チョッパ回路の寿命は平滑コンデンサC1に用いられる電解コンデンサの劣化状態で決まることが多く、特に電解コンデンサが非通電状態で高温度環境下に放置されると劣化が進行して寿命が短くなる傾向にある。したがって、一方の光源部１(又は２)が100％の調光比で点灯し且つ他方の光源部２(又は１)が消灯した場合、消灯している方の点灯回路部３又は４の平滑コンデンサC1が非通電状態で高温度環境下に放置されてしまうので、寿命が短くなってしまう虞がある。 By the way, as explained in the prior art, the life of the step-down chopper circuit is often determined by the deterioration state of the electrolytic capacitor used for the smoothing capacitor C1, and particularly when the electrolytic capacitor is left in a high temperature environment in a non-energized state. Deterioration progresses and the lifetime tends to be shortened. Therefore, when one light source unit 1 (or 2) is turned on at a dimming ratio of 100% and the other light source unit 2 (or 1) is turned off, the lighting circuit unit 3 or 4 that is turned off is smoothed. Since the capacitor C1 is left in a high temperature environment in a non-energized state, the life may be shortened.

そこで本実施形態では、全ての光源部１，２を消灯させる場合を除いて、制御部５は、各点灯回路部３，４のスイッチング電源回路のデューティ比を、０％よりも大きい所定の下限値(例えば、１％)から１００％の範囲で増減する。例えば、図３に示すように調色比を一定(19：1)に保った状態で全調光比を減少させる場合、制御部５は、全調光比が10％のときに第１光源部１の調光比を０％にせずに下限値である１％に維持する。同様に、全調光比を一定に保った状態で調色比を変化させる場合においても、制御部５は、光源部１，２の調光比を下限値である１％までしか減少させない。これにより、調光比が最も低く設定された場合でも点灯回路部３，４の平滑コンデンサC1に微少な電流を流し続けることができるので、平滑コンデンサC1が非通電状態で高温度環境下に放置されることがない。その結果、平滑コンデンサC1(電解コンデンサ)の劣化を抑えて照明装置の長寿命化を図ることができる。ただし、調光比の下限値は１％に限定されるものではなく、照明装置から照明空間に照射される光量や光色に実質的に影響を与えない程度(例えば、１〜３％)であればよい。なお、「実質的に影響を与えない程度」とは、例えば、調光比が０％のときと下限値のときとで、殆どの人が明るさ(照度)や光色の違いに気付かない程度を意味する。 Therefore, in this embodiment, except for the case where all the light source units 1 and 2 are turned off, the control unit 5 sets the duty ratio of the switching power supply circuit of each of the lighting circuit units 3 and 4 to a predetermined lower limit greater than 0%. The value is increased or decreased in the range of 1% to 100%. For example, when the total dimming ratio is decreased with the toning ratio kept constant (19: 1) as shown in FIG. 3, the control unit 5 causes the first light source when the total dimming ratio is 10%. The light control ratio of the part 1 is maintained at 1% which is the lower limit value without setting it to 0%. Similarly, when changing the toning ratio while keeping the total dimming ratio constant, the control unit 5 reduces the dimming ratio of the light source units 1 and 2 only to the lower limit of 1%. As a result, even when the dimming ratio is set to the lowest level, a slight current can continue to flow through the smoothing capacitor C1 of the lighting circuit units 3 and 4, so that the smoothing capacitor C1 is left in a high temperature environment in a non-energized state. It will not be done. As a result, the deterioration of the smoothing capacitor C1 (electrolytic capacitor) can be suppressed and the life of the lighting device can be extended. However, the lower limit value of the dimming ratio is not limited to 1%, but to the extent that it does not substantially affect the amount of light or light color irradiated from the lighting device to the illumination space (for example, 1 to 3%). I just need it. Note that “a level that does not substantially affect” means, for example, that most people do not notice the difference in brightness (illuminance) and light color when the dimming ratio is 0% and the lower limit. Means degree.

ここで、制御部５は、何れかの点灯回路部３，４の調光比を下限値としている場合を除いて、複数の点灯回路部３，４の調光比の総和が１００％となるように光源部１，２の光出力を調整してもよい。例えば、第１点灯回路部３の調光比を下限値としている場合、制御部５は、第２点灯回路部４の調光比を100％に設定しても構わない。また、本実施形態では光源部と点灯回路部の組を２組しか備えていないが、３組以上の光源部と点灯回路部を備えていても構わない。さらに、本実施形態では調光だけでなく調色も可能としているが、調光又は調色の一方のみが可能である場合でも、点灯回路部３，４の平滑コンデンサC1の劣化を抑えて照明装置の長寿命化を図ることができる。 Here, the control unit 5 has a total dimming ratio of the plurality of lighting circuit units 3 and 4 of 100% unless the dimming ratio of any of the lighting circuit units 3 and 4 is set to the lower limit value. In this way, the light output of the light source units 1 and 2 may be adjusted. For example, when the dimming ratio of the first lighting circuit unit 3 is set to the lower limit value, the control unit 5 may set the dimming ratio of the second lighting circuit unit 4 to 100%. Further, in the present embodiment, only two sets of light source units and lighting circuit units are provided, but three or more sets of light source units and lighting circuit units may be provided. Further, in the present embodiment, not only dimming but also toning is possible, but even when only one of dimming or toning is possible, lighting is performed while suppressing deterioration of the smoothing capacitor C1 of the lighting circuit units 3 and 4. The lifetime of the apparatus can be extended.

本実施形態の照明装置は、図４，５に示すような照明器具10に用いられる。この照明器具10は、図５に示すように天井面200に設置されている引掛シーリング201を利用して設置される、いわゆるシーリングライトである。また照明器具10は、器具本体11、上部ＬＥＤユニット12、上部枠13、上部パネル14、反射板15、下部ＬＥＤユニット16、下部ＬＥＤユニット17、受光ユニット18、下部パネル19、取付金具20などを備える。 The lighting device of the present embodiment is used in a lighting fixture 10 as shown in FIGS. The lighting fixture 10 is a so-called ceiling light that is installed using a hook ceiling 201 installed on the ceiling surface 200 as shown in FIG. The lighting fixture 10 includes a fixture body 11, an upper LED unit 12, an upper frame 13, an upper panel 14, a reflector 15, a lower LED unit 16, a lower LED unit 17, a light receiving unit 18, a lower panel 19, a mounting bracket 20, and the like. Prepare.

器具本体11は、略正方形状の中央部天板21と、中央部天板21の外側部に接続された上部側板22と、上部側板22に接続された側部天板23と、側部天板23の外側部に接続された下部側板24とが薄い金属板によって一体に形成されてなる。 The instrument body 11 includes a substantially square central top plate 21, an upper side plate 22 connected to the outer side of the central top plate 21, a side top plate 23 connected to the upper side plate 22, and a side ceiling. The lower side plate 24 connected to the outer side of the plate 23 is integrally formed with a thin metal plate.

上部ＬＥＤユニット12は合計４つあって、それぞれＬＥＤ基板25が器具本体11の上部側板22の外面において側方に照射方向を向けて取り付けられ、透光性を有するレンズカバー26でＬＥＤ基板25が覆われている。ＬＥＤ基板25には、第２光源部２を構成する電球色の発光ダイオードの一部が実装されている。そして、これらの発光ダイオードが発光することにより、レンズカバー26を通じて器具本体11の側部および天井面200に向けて電球色の光が放射される。なお、４つの上部ＬＥＤユニット12は、略正方形状に形成されている器具本体11の４つの辺と向き合う位置にそれぞれ設置されている。 There are a total of four upper LED units 12, each of which has an LED substrate 25 attached to the outer surface of the upper side plate 22 of the instrument main body 11 with the irradiation direction directed laterally, and the LED substrate 25 is attached by a translucent lens cover 26. Covered. On the LED board 25, a part of the light-emitting diode of the light bulb color that constitutes the second light source unit 2 is mounted. When these light emitting diodes emit light, light bulb-colored light is radiated toward the side portion of the fixture body 11 and the ceiling surface 200 through the lens cover 26. The four upper LED units 12 are respectively installed at positions facing the four sides of the fixture body 11 formed in a substantially square shape.

下部ＬＥＤユニット17も合計４つあって、ＬＥＤ基板27が器具本体11の上部側板22の下面において内方に照射方向を向けて取り付けられており、透光性を有するレンズカバー28を有する。なお、ＬＥＤ基板27には、第１光源部１を構成する白色の発光ダイオードの一部、並びに第２光源部２を構成する電球色の発光ダイオードの一部が実装されている。そして、これらの発光ダイオードが発光することにより、レンズカバー28を通じ、反射板15により反射した光が器具本体11の下方に向けて放射される。 There are a total of four lower LED units 17, and LED substrates 27 are attached inwardly on the lower surface of the upper side plate 22 of the instrument body 11 and have a lens cover 28 having translucency. Note that a part of the white light-emitting diode constituting the first light source unit 1 and a part of the light bulb-colored light-emitting diode constituting the second light source unit 2 are mounted on the LED substrate 27. When these light emitting diodes emit light, the light reflected by the reflecting plate 15 is emitted toward the lower side of the instrument body 11 through the lens cover 28.

上部枠13は矩形枠状に形成されており、上部ＬＥＤユニット12を上から覆うように本体11の上面側に取り付けられる。また、上部枠13の上部に上部パネル14が取り付けられる。反射板15は、中央部分が下方に突出した略角錐台形状に形成され、器具本体11の下面側にねじ16によって取り付けられる。反射板15の下面には、ワイヤレスリモコンから送信される赤外線信号を受信するための受光ユニット18と、透光性材料によって扁平な矩形箱状に形成され、下部ＬＥＤユニット17や反射板15を覆う下部パネル19とが取り付けられる。また取付金具20は器具本体11の中央に固定されており、引掛シーリング201に着脱自在に取り付けられる。そして、照明装置は取付金具20及び引掛シーリング201を介して交流電源100と電気的に接続される。 The upper frame 13 is formed in a rectangular frame shape, and is attached to the upper surface side of the main body 11 so as to cover the upper LED unit 12 from above. An upper panel 14 is attached to the upper part of the upper frame 13. The reflection plate 15 is formed in a substantially truncated pyramid shape with a central portion protruding downward, and is attached to the lower surface side of the instrument body 11 with a screw 16. A light receiving unit 18 for receiving an infrared signal transmitted from the wireless remote controller and a flat rectangular box shape made of a translucent material are formed on the lower surface of the reflecting plate 15 to cover the lower LED unit 17 and the reflecting plate 15. A lower panel 19 is attached. The mounting bracket 20 is fixed to the center of the instrument body 11, and is detachably attached to the hooking ceiling 201. The lighting device is electrically connected to the AC power supply 100 via the mounting bracket 20 and the hooking ceiling 201.

１第１光源部(光源部)
２第２光源部(光源部)
３第１点灯回路部(点灯回路部)
４第２点灯回路部(点灯回路部)
５制御部
C1 平滑コンデンサ(電解コンデンサ) 1 1st light source part (light source part)
2 Second light source (light source)
3 First lighting circuit (lighting circuit)
4 Second lighting circuit (lighting circuit)
5 Control unit
C1 Smoothing capacitor (electrolytic capacitor)

Claims

Respectively one or a plurality of light source unit having a plurality of light emitting diodes, wherein a plurality of lighting circuit unit for lighting and feeding individually to each light source unit, a plurality of the controls the lighting circuit unit plurality of said light sources A plurality of the lighting circuit units each having a switching power supply circuit having a smoothing electrolytic capacitor in an output stage, and the plurality of light source units have different light colors from each other. The control unit intermittently operates the switching power supply circuit of each of the lighting circuit units, and increases or decreases the duty ratio of the operation period with respect to the cycle of the intermittent operation in a range of 100% to 0%, thereby outputting the light output of the light source unit a lighting device for adjusting the control unit, except when to turn off all of the light source unit, a color for adjusting by adjusting the ratio of the light output of a plurality of the light source unit of different light colors Of the duty ratio of the switching power supply circuit of each of the respective lighting circuit unit, the lighting apparatus characterized by increases or decreases in the range from a predetermined lower limit value is greater than 0% to 100%.

The controller adjusts the ratio of the light output of the plurality of light source units having different light colors and performs the light adjustment while maintaining a predetermined toning ratio, and keeps the toning ratio constant. 2. The lighting device according to claim 1 , wherein the duty ratio of the switching power supply circuit in each of the lighting circuit units is increased or decreased within a range of 100% from a predetermined lower limit value greater than 0% even if the lighting circuit cannot be operated .

A lighting fixture comprising: the lighting device according to claim 1 or 2; and a fixture main body for holding the lighting device.