Aircraft light source with at least one light-emitting diode and a diffuser
View Patent ↗An aircraft cabin panel includes an aircraft cabin lighting seamlessly integrated with the panel. The aircraft cabin lighting includes at least one light emitting diode or LED and a diffuser. The diffuser includes a first body with a first index of refraction and a plurality of second bodies which are arranged in the first body and having a second index of refraction.
1. A panel of an aircraft cabin, comprising:
a main panel member; and
an aircraft cabin lighting seamlessly integrated in the main panel member, the aircraft cabin lighting including at least one LED directed toward an interior of the aircraft cabin and a diffuser, the diffuser having a first body with a constant thickness and a first index of refraction and a plurality of second bodies which are arranged in the first body and have a second index of refraction, the diffuser residing between the at least one LED and the interior of the aircraft cabin.
2. Aircraft cabin panel according to claim 1 , characterized in that the first body comprises a flame-retardant and/or flame-resistant material and/or the second body comprises a flame retardant and/or flame-resistant material.
3. Aircraft cabin panel according to claim 1 , characterized in that the first body ( 14 ) comprises a plastic material.
4. Aircraft cabin panel according to claim 3 , characterized in that the first body comprises polycarbonate.
5. Aircraft cabin panel according to claim 1 , characterized in that the second bodies comprise glass.
6. Aircraft cabin panel according to claim 1 , characterized in that the second bodies are essentially spherical.
7. Aircraft cabin panel according to claim 1 , characterized in that the second bodies are distributed in a plurality of planes in the first body.
8. Aircraft cabin panel according to claim 1 , characterized in that in operation, the LED generates a light cone, and the diffuser has a light emission side and the LED and the diffuser are spaced at such a distance from each other that the area on a light entry side of the diffuser which is illuminated by the light cone of the LED is smaller than a light radiating area, which the diffuser generates from the light cone, on the light emission side of the diffuser.
9. Aircraft cabin panel according to claim 1 , characterized in that the aircraft light source comprises a plurality of LEDs, each of the LEDs generating a light cone, the plurality of LEDs and the diffuser being spaced at such a distance from each other that the respective areas of illumination caused by the light cones of the LEDS at the light entry side of the diffuser do not overlap.
10. Aircraft cabin panel according to claim 9 , characterized in that at least one LED emits light of a different wavelength than the wavelength of the light which another LED emits.
11. Aircraft cabin panel according to claim 1 , characterized in that the aircraft light source comprises a plurality of LEDs, each of the LEDs generating a light cone, at least one LED emitting light of a different wavelength than the wavelength of the light which another LED emits, and the plurality of LEDs and the diffuser being spaced at such a distance from each other that the light cones of the LEDs at least partly overlap.
12. Aircraft cabin panel according to claim 1 , characterized in that the degree of transmission of the diffuser ranges between about 0.8 to 0.9.
13. Aircraft cabin panel according to claim 1 , characterized in that the constant thickness of the diffuser is about 1 millimeter to about 3 millimeters.
14. Aircraft cabin panel according to claim 1 , wherein the panel is a side panel.
15. Aircraft cabin panel according to claim 1 , wherein the panel is an overhead panel.
16. A method for lighting an aircraft comprising:
directing light from a light source of an aircraft cabin lighting toward the inside of the aircraft, the light source comprising at least one LED seamlessly integrated in a main panel member of an aircraft panel, wherein the LED generates at least one light cone; and
diffusing the directed light with a diffuser, the diffuser having a first body with a constant thickness and a first index of refraction and a plurality of second bodies having a second index of refraction, the diffuser having a first side illuminated by the at least one light cone and second, opposite side from which the directed light is emitted, the diffuser spaced from the at least one LED such that the area of the first side illuminated by the at least one light cone is smaller than the area of the second side from which the diffused light is emitted, the diffuser residing between the at least one LED and the inside of the aircraft.