H - Electricity – 05 – B
Patent
H - Electricity
05
B
H05B 41/14 (2006.01) H05B 41/16 (2006.01) H05B 41/285 (2006.01)
Patent
CA 2418839
The invention relates to a novel operating circuit for a low-pressure gas discharge lamp 1 in the case of which a digital controller 12 is designed such that by gradually lowering the operating frequency in the ignition procedure it initiates shutdown operations of a safety shutdown device for excessive currents through a lamp inductor 1C in order thereafter to increase the operating frequency somewhat. It is possible overall in this way to achieve an ignition, for example by repeated pulsed ignition operations as far as shutdown operations, or else by a continuous ignition operation at a minimum frequency at which no shutdown operation occurs. The invention has the advantage of being insensitive to temperature fluctuations and component tolerances and, moreover, of permitting the lamp inductor 10 to have comparatively small dimensions.
Busse Olaf
Orth Klaus
Patent-Treuhand-Gesellschaft Fuer Elektrische Gluehlampen Mbh
Smart & Biggar
LandOfFree
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