H - Electricity – 05 – B
Patent
H - Electricity
05
B
315/63
H05B 41/16 (2006.01)
Patent
CA 1110319
TITLE OF THE INVENTION: DISCHARGE LAMP OPERATING SYSTEM ABSTRACT OF THE DISCLOSURE: A discharge lamp is ignited in every half cycle in its operating system including a discharge lamp operating circuit provided with a low frequency alternating current power source, a single winding type current limiter. The discharge lamp which is connected to the power source through the current limiter and a series circuit includ- ing a high voltage output generator which is connected in parallel to the discharge lamp. The high voltage out- put generator operates at least during the lamp operation for reigniting the discharge lamp. The voltage of the low frequency alternating current power source is set to less than the required reignition voltage of the discharge lamp during its operation, whereby the lamp current stabilizer is minimized. Further, a filament preheating circuit is arranged to use current derived from the high voltage gen- erator. The filament preheating circuit is combined with this operating circuit and so is a time delay for assuring a stable operation.
296126
Gowling Lafleur Henderson Llp
New Nippon Electric Company Ltd.
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