METHOD TO CONTROL A LIGHTING CURRENT OF A LIGHTING DEVICE
First Claim
1. A method to control a lighting current of a lighting device with a plurality of semiconductor lighting means, provided to signal and mark traffic areas in airports, comprising the steps of:
- predetermining period intervals with a fixed period length, selecting an average lighting current to operate the semiconductor lighting means within the period intervals,generating in each of the period intervals a plurality of current pulses with a pulse amplitude IP and a fixed pulse duration T, andselecting the number of current pulses per period interval such that within the period interval the respectively selected average lighting current is reached, with the pulse pauses between subsequent current pulses being adjusted variably.
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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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Citations
9 Claims
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1. A method to control a lighting current of a lighting device with a plurality of semiconductor lighting means, provided to signal and mark traffic areas in airports, comprising the steps of:
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predetermining period intervals with a fixed period length, selecting an average lighting current to operate the semiconductor lighting means within the period intervals, generating in each of the period intervals a plurality of current pulses with a pulse amplitude IP and a fixed pulse duration T, and selecting the number of current pulses per period interval such that within the period interval the respectively selected average lighting current is reached, with the pulse pauses between subsequent current pulses being adjusted variably. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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Specification