Patent classifications
H
ELECTRICITY
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H05
ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
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H05B
ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
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41/00
Circuit arrangements or apparatus for igniting or operating discharge lamps
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H05B41/26
in which the lamp is fed by power derived from DC by means of a converter, e.g. by high-voltage DC
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H05B41/28
using static converters
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H05B41/288
with semiconductor devices and specially adapted for lamps without preheating electrodes, e.g. for high-intensity discharge lamps, high-pressure mercury or sodium lamps or low-pressure sodium lamps
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H05B41/292
Arrangements for protecting lamps or circuits against abnormal operating conditions
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