A light engine for use in systems such as automotive lighting systems employs two or more semiconductor light sources, such as LEDs. Light emitted from the light sources is captured by light pipes which are mounted such that the light capturing surface of the light pipes are properly positioned, with...http://www.google.se/patents/US7717597?utm_source=gb-gplus-sharePatent US7717597 - Semiconductor light engine using polymer light pipes and lighting systems constructed with the light engine
