Electric lamp and discharge devices: systems – Current and/or voltage regulation – Automatic regulation
Patent
1997-08-21
1999-12-07
Philogene, Haissa
Electric lamp and discharge devices: systems
Current and/or voltage regulation
Automatic regulation
315209R, 315254, 323252, G05F 100
Patent
active
059989416
ABSTRACT:
An "exit" sign lighting system comprising, in combination a housing having the word EXIT formed in an opening wall thereof, a translucent member in said opening, a gas discharge device, such as a fluorescent tube is driven from a source of a low-voltage, high-frequency square wave voltage having a pair of output terminals and an LC free circuit connecting the low-voltage, high-frequency square wave voltage to the gas discharge device to non-thermionically excite and illuminate the gas discharge device, and thereby illuminate the translucent member and the word EXIT. The low voltage is from about 2 volts to about 90 volts and the frequency is from about 75 kHz to about 3.5 MHz.
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Philogene Haissa
Zegeer Jim
LandOfFree
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