Method for adjusting temperature of exterior mirror of motor vehicle e.g. motor car, involves controlling mirror heaters based on mirror glass transition temperature which is determined by predetermined resistance ratio

摘要

The method involves adjusting the mirror heaters (7,9) based on the temperature by a pulse width modulated signal. The mirror heaters are controlled based on the mirror glass transition temperature. The mirror glass transition temperature is determined by the resistance ratio of a current resistance value of mirror glass of outside mirrors (3,5) and a normalized resistance value of the mirror glass. An independent claim is included for a motor car.