LIGHTING DEVICE AND LUMINAIRE

• Main Author: IDO SHIGERU
• Format: Patent
• Language: English; Japanese
• Published: 24.08.2017
• Subjects: ELECTRIC HEATING; ELECTRIC LIGHTING NOT OTHERWISE PROVIDED FOR; ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR; ELECTRICITY

PROBLEM TO BE SOLVED: To suppress increase of the manufacturing cost while reducing harmonic distortion of input current.SOLUTION: A driving circuit 12 is configured to switch a first period, a second period, a third period, the second period and the first period in turn according to the voltage value of a pulsating voltage V2 within one cycle of the pulsating voltage V2. The first period is a period during which output current I1 output from a first output terminal 113 is supplied to a shunt circuit 13. The second period is a period during which the output current I1 is supplied to a first solid-state light source unit 21. The third period is a period during which the output current I1 is supplied to the first solid-state light source unit 21, a second solid-state light source unit 22 and a third solid-state light source unit 23. The shunt circuit 13 is electrically connected in parallel with the first solid-state light source unit 21. In the first period, the shunt circuit 13 is configured to allow an output current I1 (current I20) proportional to the voltage value of the pulsating voltage V2.SELECTED DRAWING: Figure 1 【課題】入力電流の高調波歪みを低減しつつ製造コストの上昇を抑える。【解決手段】駆動回路１２は、脈流電圧Ｖ２の１周期内において、脈流電圧Ｖ２の電圧値に応じて、第１期間と、第２期間と、第３期間と、第２期間と、第１期間とを順に切り換えるように構成されている。第１期間は、第１出力端子１１３から出力される出力電流Ｉ１を分流回路１３に供給する期間である。第２期間は、出力電流Ｉ１を第１固体光源部２１に供給する期間である。第３期間は、出力電流Ｉ１を第１固体光源部２１、第２固体光源部２２及び第３固体光源部２３に供給する期間である。分流回路１３は、第１固体光源部２１と電気的に並列接続されている。分流回路１３は、第１期間に、脈流電圧Ｖ２の電圧値に比例した出力電流Ｉ１（電流Ｉ２０）を流すように構成されている。【選択図】 図１