Electric lamp and discharge devices: systems – Pulsating or a.c. supply – Induction-type discharge device load
Reexamination Certificate
2006-02-14
2006-02-14
Tran, Thuy V. (Department: 2821)
Electric lamp and discharge devices: systems
Pulsating or a.c. supply
Induction-type discharge device load
C315S291000, C315SDIG002, C315S307000
Reexamination Certificate
active
06998792
ABSTRACT:
An electrodeless discharge lamp operating device including an electrodeless discharge lamp3and a ballast circuit4, wherein the ballast circuit4includes: an AC-DC converter5for converting a phase-controlled AC voltage into a DC voltage; a DC-AC converter6formed so as to intermittently drive the electrodeless discharge lamp3due to the existence of an operating period during which a high-frequency voltage is applied to the electrodeless discharge lamp3so that the electrodeless discharge lamp3is operated, and an extinguishing period during which the generation of the high-frequency voltage is stopped so that the electrodeless discharge lamp3is extinguished; and a dimming controller7for detecting the turn-on of the phase-controlled AC voltage, for outputting an intermittent command signal that changes the ratio between the operating period and the extinguishing period to the DC-AC converter6, and for outputting a signal that maintains an intermittent dimmable operating state even if dimming state is in full illumination.
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International Search Report for PCT/JP03/07235,mailed Sep. 2, 2003; ISA/JPO.
Kominami Satoshi
Kurachi Toshiaki
Matsubayashi Yoko
Miyazaki Kouji
Takahashi Kenichiro
Cabucos Marie Antoinette
Tran Thuy V.
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