METHOD FOR OPERATING A GAS DISCHARGE LAMP OF A MOTOR VEHICLE HEADLAMP
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United States of America Patent
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Issued Date -
Aug 22, 2013
app pub date -
Sep 9, 2011
filing date -
Sep 16, 2010
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A method for operating a gas-discharge lamp (10) of a motor-vehicle headlamp comprises steps of operating the gas-discharge lamp (10) in a first operating mode at a comparatively higher power and alternating-current voltage and in a second operating mode in a temporally limiting manner at a comparatively lower power and direct-current voltage. When a switch is made from the first operating mode to the second operating mode, a polarity of the direct-current voltage is predefined depending on the respective polarities of the direct-current voltage in at least one previous operating phase of the second operating mode. A device or unit operates the gas-discharge lamp and controls a sequence of the method.
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