An illumination system, preferably for illumination in a car, comprising at least one plain or slightly curved, solid light guide (4) made of transparent material, said light guide receiving light from a light (2) source and being provided with means (5, 6) for extracting light from said light guide,...http://www.google.com.au/patents/US20050231981?utm_source=gb-gplus-sharePatent US20050231981 - Illumination system combining diffuse homogeneous lighting with direct spot illumination
