METHOD TO CONTROL A LIGHTING CURRENT OF A LIGHTING DEVICE
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United States of America Patent
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Issued Date -
Jun 20, 2013
app pub date -
Apr 11, 2011
filing date -
Apr 16, 2010
priority date (Note) -
Abandoned
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Abstract
A method for controlling a lighting current of a lighting device with a number of semiconductor lighting means, installed for signaling and marking traffic areas of airports, in which period intervals are predetermined with a fixed period length, selected with an average lighting current to operate a semiconductor lighting means within the period intervals and in each of the period intervals a number of current pulses is generated with a pulse amplitude IP and a fixed pulse duration T, with the number of current pulses in each period interval being selected such that within the period intervals the respectively predetermined average lighting current is reached, with the pulse pauses being variably adjusted between subsequent current pulses.
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