Apparatus for operating discharge lamps

Details Apparatus for operating discharge lamps Apparatus for operating discharge lamps

2005-03-29

2005-03-29

Vo, Tuyet Thi (Department: 2821)

Electric lamp and discharge devices: systems

Current and/or voltage regulation

Automatic regulation

C315S311000, C315S323000

Reexamination Certificate

active

06873122

ABSTRACT:
An apparatus for operating a plurality of discharge lamps is to be designed so as to be more cost-effective. A first current control device, in particular a heat-sensitive resistor having a positive temperature coefficient, is connected in parallel with a first contact device for electrically connecting a first discharge lamp. Furthermore, a second contact device for electrically connecting a second discharge lamp is connected in parallel with a second current control device, the first and second contact devices being connected in series. A defined preheating period for the lamps can therefore be achieved. By using a sequential starting capacitor in parallel with one of the lamps, impermissible load current surges may be avoided.

REFERENCES:
patent: 3924155 (1975-12-01), Vogeli
patent: 4145638 (1979-03-01), Kaneda
patent: 4866350 (1989-09-01), Counts
patent: 6201354 (2001-03-01), Kokubo
patent: 6518707 (2003-02-01), Gershen et al.

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