A photosensor includes a plurality of photosensitive regions including a first photosensitive region connected to a first voltage reference, and at least one additional photosensitive region. A signal collector is connected to the first photosensitive region. At least one switching device is for switching...http://www.google.fr/patents/US7554170?utm_source=gb-gplus-shareBrevet US7554170 - Variably responsive photosensor
