The inventive electrochromic mirror may be used in a vehicle rearview mirror assembly having a light source positioned behind the electrochromic mirror for selectively projecting light through the mirror. The electrochromic mirror includes front and rear spaced elements each having front and rear surfaces...http://www.google.com.au/patents/US7009751?utm_source=gb-gplus-sharePatent US7009751 - Electrochromic rearview mirror incorporating a third surface partially transmissive reflector
