LIGHTING DEVICE AND LIGHTING EQUIPMENT

PROBLEM TO BE SOLVED: To provide a lighting device that can enhance safety of the operation while improving the power factor, and lighting equipment using the same.SOLUTION: A lighting device 10 has a rectifying circuit 3, a conversion circuit 4 and a control circuit 5. The conversion circuit 4 has...

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Bibliographic Details
Main Authors SEKI KEISUKE, HIMEDA MASATO, DOI KATSUYUKI, ASANO HIROYUKI, KAMOI TAKESHI, YAMAMOTO MASASHI, YAMAHARA DAISUKE
Format Patent
LanguageEnglish
Japanese
Published 30.05.2016
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Summary:PROBLEM TO BE SOLVED: To provide a lighting device that can enhance safety of the operation while improving the power factor, and lighting equipment using the same.SOLUTION: A lighting device 10 has a rectifying circuit 3, a conversion circuit 4 and a control circuit 5. The conversion circuit 4 has a capacitor C1, a series circuit of an inductor L1 and a switching element Q1, a series circuit of a capacitor C2 and an inductor L2 and a series circuit of a diode D1 and a capacitor C3. The inductance of the inductor L1 and the inductance of the inductor L2 are set so that a period for which the diode D1 is conducted is set to be shorter than a half period of the resonance period in a closed loop circuit containing the capacitor C1, the inductor L1, the capacitor C2 and the capacitor C3. The control circuit 5 controls the switching element Q1 so that the switching element Q1 is set to ON-state every fixed period.SELECTED DRAWING: Figure 1 【課題】力率改善を図りながらも、動作の安定性を向上させることが可能な点灯装置およびそれを用いた照明器具を提供する。【解決手段】点灯装置10は、整流回路3、変換回路4、制御回路5を備える。変換回路4は、コンデンサC1、インダクタL1とスイッチング素子Q1の直列回路、コンデンサC2とインダクタL2の直列回路、ダイオードD1およびコンデンサC3の直列回路を備える。インダクタL1およびインダクタL2のインダクタンスは、ダイオードD1が導通する期間を、コンデンサC1、インダクタL1、コンデンサC2、コンデンサC3を含む閉ループ回路における共振周期の半周期よりも短くするように、設定されている。制御回路5は、一定周期ごとにスイッチング素子Q1がオン状態となるように、スイッチング素子Q1を制御するように構成されている。【選択図】図1
Bibliography:Application Number: JP20140235772