A motion detection camera system which may be used as a security camera includes an active pixel imaging system operable in a video and differential mode connected to a mode activation circuit that controls the imaging system mode. In the video mode, the imaging system generates an output signal containing...http://www.google.com.hk/patents/US5602585?utm_source=gb-gplus-share專利 US5602585 - Method and system for camera with motion detection
