Lighting system for motor vehicles
A lighting device for motor vehicles comprising an optical waveguide element ( 14 ) that has a light entrance surface ( 16 ) and a light exit surface ( 15 ) and that has an electric light-emitting layer ( 19 ) on at least part of at least one surface of the optical waveguide element. The light-emitting layer is advantageously in the form of an OLED layer.
1. A lighting device for a headlight module ( 12 ) of a motor vehicle, comprising:
a light exit opening ( 13 ) for the headlight module ( 12 );
an optical waveguide element ( 14 ) in the form of a hollow cylinder surrounding at least a portion of a perimeter of the light exit opening ( 13 ) for the headlight module ( 12 ), wherein the optical waveguide element ( 14 ) includes a light entrance surface ( 16 ) on a rear-facing end and a light exit surface ( 15 ) on a forward-facing end;
an electric light-emitting layer ( 19 ) disposed on at least part of at least one inner or outer surface of the optical waveguide element ( 14 ); and
an optical waveguide ( 17 ) having a geometry that corresponds to the optical waveguide element ( 14 ), wherein the optical waveguide ( 17 ) includes at least one input point ( 5 ) for light from at least one light source ( 6 ),
wherein the optical waveguide ( 17 ) is bar-shaped and has, along at least part of its length, an arrangement of irregular structures ( 7 ) and a light exit surface ( 8 ) opposite the arrangement of irregular structures ( 7 ), the light entrance surface ( 16 ) of the optical waveguide element ( 14 ) being connected to the light exit surface ( 8 ) of the optical waveguide ( 17 ).
2. The lighting device of claim 1 , wherein the light-emitting layer ( 19 ) is in the form of an OLED layer.
3. The lighting device of claim 1 , wherein the light-emitting layer ( 19 ) is in the form of an electroluminescence layer.
4. The lighting device of claim 1 , wherein the geometry of the optical waveguide ( 17 ) is adapted to the light entrance surface ( 16 ) of the optical waveguide element ( 14 ).
5. The lighting device of claim 1 , wherein the optical waveguide element ( 14 ) comprises a transparent material.
6. The lighting device of claim 1 , wherein an electric light-emitting layer is provided on the light entrance surface ( 16 ) of the optical waveguide element ( 14 ).
7. The lighting device of claim 1 , wherein the electric light-emitting layer ( 19 ) is provided on the outer surface of the optical waveguide element ( 14 ).
8. The lighting device of claim 1 , wherein the electric light-emitting layer ( 19 ) is transparent.