A system for pointing a device at a given target has a sensor for sensing a number of positional information points of the target with the sensor relaying the positional information points to a controller. The controller is for computing a directional control information based on the relayed positional...http://www.google.co.uk/patents/US7245251?utm_source=gb-gplus-sharePatent US7245251 - Apparatus for automatically pointing a device at a target
