Patent ID: 6890089

Claim:
A light-guiding system for improving the lighting conditions in the passenger compartment of a motor vehicle, comprising: a light-generating unit for generating light and capable of being switched on and off electrically; and a flat light guide having lateral edge surfaces, the light guide for guiding the light, the light guide being coupled to the light-generating unit for coupling in the light, the light guide being arranged in an area of an interior lining of a roof of the motor vehicle, the light being coupled in at one or more of the lateral surfaces and coupled out of the light guide into the passenger compartment of the vehicle over a large surface in a homogeneous manner, the light guide having a flat surface facing away from the passenger compartment and being structured by roughening, embossing, or boring with a plurality of structures, each of the structures having one of a pyramid shape, a wedge shape and a cone shape and having an edge length of said structure between 1 μm and 3 μm and an angle inclination between 20° and 70°.