A display mirror assembly includes a reflective mirror element having a semitransparent mirror reflector coated onto a light-transmitting substrate. Visible light transmission through the reflective mirror element is at least 3 percent and visible light reflectance by the reflective mirror element is...http://www.google.de/patents/US7771061?utm_source=gb-gplus-sharePatent US7771061 - Display mirror assembly suitable for use in a vehicle
