A vehicular rearview mirror system includes an interior rearview mirror system having an electrochromic reflective element, a digital electrochromic drive circuit supplying a drive signal to the reflective element and a garage door opener. The garage door opener includes a transmitter and logic circuit....http://www.google.de/patents/US6970073?utm_source=gb-gplus-sharePatent US6970073 - Vehicular rearview mirror system with microcontroller
