Method for controlling a light flux of a lighting device that has a plurality of semiconductor luminous elements and is designed for the identification and marking of traffic areas of airports
A light-emitting device and luminous flux technology, applied in the use of semiconductor lamps, electroluminescent light sources, fixed lighting devices, etc., can solve the problems of interference radiation, switching element loss, high technical cost of pulse width modulated signals, etc., and achieve technical realization. simple effect
Inactive Publication Date: 2013-02-06
HELLA KG HUECK & CO
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Problems solved by technology
A disadvantage of this relationship is, on the one hand, the high technical complexity for generating the pulse-width-modulated signals, which are preferably realized by a control device with a conventional microprocessor
Another disadvantage is that at low control powers, i.e. at very short NENN The semiconductor illuminants are in the form of flickering visible light fluctuations in the form of flickering on-pulses and very long pulse intervals, and the high switching frequencies which are necessary for the illuminants for optical reasons generate power losses in the switching elements and cause electromagnetic interference radiation
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[0024] Combine below figure 1 The basic principle of the method for controlling the luminous flux of luminous devices with a certain number of semiconductor luminous substances which are provided for indicating and marking airport traffic areas, eg, take-off runways, landing runways or taxiways, is further described. Such lighting devices can be especially provided for underground operation. The semiconductor light emitter may in particular be a light emitting diode.
[0025] figure 1 The left part of , shows the ratio of different intermediate luminous fluxes between 5% and 100% of the maximum luminous flux when implementing the new control method. figure 1 The right part shows the ratio of pulse width modulation methods known from the state of the art for comparison.
[0026] In the following, as an example, a periodic interval with a fixed given length of 1 ms is used as a starting point. so figure 1 A total of two successive period intervals each having a constant per...
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The invention relates to a method for controlling a light flux of a lighting device that has a plurality of semiconductor luminous elements and is designed for the identification and marking of traffic areas of airports, wherein period intervals having a fixed period length are predefined, a mean light flux for operating the semiconductor luminous elements within the period intervals is selected, and in each of the period intervals a number of current pulses having a pulse amplitude IP and a fixed pulse duration T are generated, wherein the number of current pulses in each period interval is selected such that within the period intervals the respective predefined mean light flux is achieved, wherein the pulse breaks between successive current pulses are set variably.
Description
technical field [0001] The invention relates to a method for controlling the luminous flux of a luminous device having a number of semiconductor luminous objects, said luminous device being arranged for indicating and marking a traffic zone of an airport, wherein periodic intervals with a fixed periodic length are specified, at In this cycle interval, the intermediate luminous flux is selected for running the semiconductor luminous material and a certain number of pulses with pulse amplitude I are generated in each cycle interval. P and a current pulse of fixed pulse duration T. Background technique [0002] Lighting devices of the aforementioned type, which are suitable for indicating and marking airport traffic areas and for signaling, are known in various embodiments in the state of the art. For example, the take-off and landing runways as well as the taxiways of airports have corresponding luminous devices, which can mark, for example, the start, end and midpoint of the...
Claims
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IPC IPC(8): H05B33/08F21S8/00H05B44/00
CPCH05B33/0818F21W2111/06H05B33/0848H05B45/327H05B45/335H05B47/10H05B45/397Y02B20/30H05B45/14
Inventor N·德齐乌斯
Owner HELLA KG HUECK & CO