Neon lamp power supply for producing a bubble-free discharge wit

Details Neon lamp power supply for producing a bubble-free discharge wit Neon lamp power supply for producing a bubble-free discharge wit

1997-05-06

2000-09-19

Vu, David H.

Electric lamp and discharge devices: systems

Periodic switch in the supply circuit

Silicon controlled rectifier ignition

315219, 315224, 315DIG5, H05B 3702

Patent

active

061217328

ABSTRACT:
A power supply for a gas-discharge lamp includes a voltage source and drive circuit that produces an asymmetric output, a step-up transformer for stepping up the voltage to an appropriate level for driving the lamp, a blocking capacitor connected in series with the transformer and the lamp for preventing DC current from flowing through the transformer and the lamp to avoid core saturation of the transformer. A DC voltage is established across the lamp that prevents the formation of "bubbles" or "beads" in the gas discharge. An inverter is used to periodically reverse the polarity of the DC voltage to prevent mercury migration in mercury-containing lamps.

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