HIGH PRESSURE DISCHARGE LAMP LIGHTING DEVICE AND LIGHTING SYSTEM

PROBLEM TO BE SOLVED: To provide a high pressure discharge lamp lighting device with at least two chopper circuits to be connected in parallel to the output end of a DC power supply, preventing a current flowing in inductors of all chopper circuits from moving into a continuous mode, and to provide...

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Bibliographische Detailangaben
Hauptverfasser:	YAMASHITA KOJI, FUKUDA KENICHI, YUFUKU AKIRA, NORO HIROSHI, GOURIKI TAKESHI
Format:	Patent
Sprache:	eng
Schlagworte:	ELECTRIC HEATING ELECTRIC LIGHTING NOT OTHERWISE PROVIDED FOR ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR ELECTRICITY
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To provide a high pressure discharge lamp lighting device with at least two chopper circuits to be connected in parallel to the output end of a DC power supply, preventing a current flowing in inductors of all chopper circuits from moving into a continuous mode, and to provide a lighting system therewith. SOLUTION: A control circuit 5 controls a first switching element Qa by detecting at least a current flowing in the first inductor La of the first chopper circuit 2a. The second chopper circuit 2b controls a second switching element Qb without detecting a current flowing in the second inductor Lb and also controls the second switching element Qb so that there is a time for the current flowing in the second inductor Lb to be zero periodically. COPYRIGHT: (C)2005,JPO&NCIPI