Large display apparatus using discharge lamps and discharge lamp

Details Large display apparatus using discharge lamps and discharge lamp Large display apparatus using discharge lamps and discharge lamp

1989-08-31

1992-03-10

Weldon, Ulysses

Communications: electrical

Land vehicle alarms or indicators

Internal alarm or indicator responsive to a condition of the...

340811, 340813, 315307, G09G 324

Patent

active

050953052

ABSTRACT:
A high frequency power source is coupled with a capacitor of a large capacitance. An electric power of the power source is supplied to a plurality of discharge lamps repsectively through lamp load circuits associated therewith. Each load circuit includes a transformer limiting current to the lamp, and a switching means for selectively supplying the electric power from the power source to the lamp, through the transformer. Two types of the switching means, open control type and short control type, are used for the switching means of the discharge load circuit.

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