Electric lamp and discharge devices: systems – Periodic switch in the supply circuit – Periodic switch in the primary circuit of the supply...
Reexamination Certificate
2008-10-09
2010-11-16
Vu, David Hung (Department: 2821)
Electric lamp and discharge devices: systems
Periodic switch in the supply circuit
Periodic switch in the primary circuit of the supply...
C315S224000, C315S307000
Reexamination Certificate
active
07834558
ABSTRACT:
Control of delivery of current through one or more discharge lamps. Methods include alternately switching on and off switching elements that control a fluorescent lamp, in response to receiving input, until the brightness of the lamp decreases to a threshold. Further, methods include providing control signals at complementary duty cycles to further decrease the brightness and alternating the duty cycles of the signals applied to the filaments of the fluorescent lamp. Methods also include identify parameter sets stored in memory to operate fluorescent lamps.
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Notohamiprodjo Hubertus
Pitigoi-Aron Radu
Marvell International Ltd.
Vu David Hung
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