LIGHTING DEVICE AND LUMINAIRE USING THE SAME

• Main Authors: TAKEDA TERUHITO, OGASAWARA KIYOSHI, GOTO HIROMICHI, FUJINO TAKASHI, SANTAD THITIWAT
• Format: Patent
• Language: English; Japanese
• Published: 18.12.2014
• Subjects: APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC,OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWERSUPPLY SYSTEMS; CONTROL OR REGULATION THEREOF; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUTPOWER; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; ELECTRIC HEATING; ELECTRIC LIGHTING NOT OTHERWISE PROVIDED FOR; ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR; ELECTRICITY; GENERATION

PROBLEM TO BE SOLVED: To provide a lighting device and a luminaire that implement improved reliability while implementing a compact size.SOLUTION: A lighting device 10 includes a filter 1, a first rectification circuit 2 and a DC-DC converter 3. An output end 2a of the first rectification circuit 2 is connected to a first main terminal of a switching element Q1 via an inductor L1, a diode D1 with a capacitor C3 connected in parallel, and a primary winding N1, the first main terminal is connected to an anode of the diode D1 via a capacitor C1, a second main terminal is connected to an output end 2b and to a cathode of the diode D1 via a capacitor C2, and a control terminal is connected to a control circuit 5. One end of a secondary winding N2 is connected to the other end of the secondary winding N2 via a series circuit of diodes D2, D3 connected in anti-series, an inductor L2 and a capacitor C4 are connected in series between cathodes of the diodes D2, D3 and an anode of the diode D3, and a load can be connected in parallel with the capacitor C4. 【課題】小型化を図りながらも、信頼性の向上を図ることが可能な点灯装置および照明器具を提供する。【解決手段】点灯装置１０は、フィルタ１、第１整流回路２、ＤＣ−ＤＣコンバータ３を備え、第１整流回路２の出力端２ａは、インダクタＬ１、コンデンサＣ３が並列接続されたダイオードＤ１、一次巻線Ｎ１を介してスイッチング素子Ｑ１の第１主端子に接続され、第１主端子は、コンデンサＣ１を介してダイオードＤ１のアノードに接続され、第２主端子は、出力端２ｂと、コンデンサＣ２を介したダイオードＤ１のカソードとに接続され、制御端子は、制御回路５に接続される。二次巻線Ｎ２の一端は、逆直列接続されたダイオードＤ２，Ｄ３の直列回路を介して二次巻線Ｎ２の他端に接続され、各ダイオードＤ２，Ｄ３のカソードとダイオードＤ３のアノードとの間にインダクタＬ２、コンデンサＣ４が直列接続され、コンデンサＣ４と並列に負荷を接続することができる。【選択図】図１