Drive circuit for illumination unit

Details Drive circuit for illumination unit Drive circuit for illumination unit

2007-01-23

2007-01-23

Wong, Don (Department: 2163)

Electric lamp and discharge devices: systems

Periodic switch in the supply circuit

Silicon controlled rectifier ignition

C315S2090SC, C315S220000

Reexamination Certificate

active

10968041

ABSTRACT:
In case of driving a plurality of lamps with the use of a plurality of output transformers, a difference in the bright-ness of each lamp occurs by a dispersion of characteristics of the output transformers, and an object is to prevent such troubles. For this purpose, a primary side of a plurality of output transformers of a one input-plural output type are respectively connected, and illumination units are connected to the secondary side of each output transformer. All of the secondary output terminals of each output transformer are connected to the secondary output terminals of counter phase and are connected by forming a loop circuit with the connection of the output terminals in series in closed loom form. The illumination units are connected between the secondary output terminals of the output transformer and the output terminal of the other output transformer of counter phase with the output terminal.

REFERENCES:
patent: 4413209 (1983-11-01), Roche
patent: 4441055 (1984-04-01), Balchjunas et al.
patent: 4682082 (1987-07-01), MacAskill et al.
patent: 5406174 (1995-04-01), Slegers
patent: 5822201 (1998-10-01), Kijima
patent: 6459216 (2002-10-01), Tsai
patent: 6566821 (2003-05-01), Nakatsuka et al.
patent: 2002/0070914 (2002-06-01), Bruning et al.

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