An exterior aircraft lighting device (2) comprises: at least one light source (4); an optical element (6) having a light entry side (6a) facing the at least one light source (4) and a light exit side (6b) and being configured for modifying light emitted by the at least one light source (4); at least one photo detector (8), which is configured and arranged for detecting a portion of the light emitted by the at least one light source (4), which is reflected by the light entry side (6a) of the at least one optical element (6), the photo detector (8) providing a detection value, representing the amount of detected light; and a control and evaluation unit (14) which is configured for evaluating the state of wear of the at least one light source (4) based on the detection value provided by the at least one photo detector (8).
EXTERIOR AIRCRAFT LIGHTING DEVICE
FLUGZEUGAUSSENBELEUCHTUNGSVORRICHTUNG
DISPOSITIF D'ÉCLAIRAGE EXTÉRIEUR POUR AÉRONEF
2018-01-10
Patent
Electronic Resource
English
IPC: | B64D Ausrüstung für Flugzeuge , EQUIPMENT FOR FITTING IN OR TO AIRCRAFT / F21W Index-Schema in Verbindung mit den Unterklassen F21K, F21L, F21S und F21V, betreffend den Gebrauch oder Einsatz von Leuchten oder Beleuchtungssystem , INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS / H05B ELECTRIC HEATING , Elektrische Heizung |
European Patent Office | 2019
|European Patent Office | 2018
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