Ballast circuit

Details Ballast circuit Ballast circuit

2008-10-23

2011-11-01

Owens, Douglas W (Department: 2821)

Electric lamp and discharge devices: systems

Plural load device systems

C315S291000

Reexamination Certificate

active

08049441

ABSTRACT:
A ballast circuit is provided. The ballast circuit comprises a first lamp set, a second lamp set, a detection circuit, and a latch circuit. The first lamp set comprises a first inductor and a plurality of containing areas. The second lamp set comprises a second inductor and at least one containing area. The detection circuit is configured to receive a direct current (DC) voltage and coupled to the containing areas of the first and second lamp sets so that the detection circuit, the first inductor, the second inductor, and a plurality of lamps contained in the containing areas are in a series connection and generate a first signal. The latch circuit is coupled to the detection circuit and configured to selectively start in response to the first signal.

REFERENCES:
patent: 5546300 (1996-08-01), Lee et al.
patent: 6366032 (2002-04-01), Allison et al.
patent: 6400095 (2002-06-01), Primisser et al.
patent: 7042161 (2006-05-01), Konopka
patent: 7288901 (2007-10-01), Yu et al.

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