Patent ID: 8461991

Claim:
A self-contained security light comprising a mounting base for attachment to a support therefor; a sensor device carried on the mounting base for detecting the presence of a person or moving object within a predetermined angular range of the sensor device with the sensor device predetermined angular range emanating from the mounting base that carries the sensor device; a plurality of sensors of the sensor device that are each operable to detect the presence of a person or moving object within one of a plurality of angularly adjacent sectors each radiating from a respective one of the sensors and which thereby each emanate from the mounting base carrying the sensors and that together cover the predetermined angular range of the sensor device; a light source and reflector assembly carried by the mounting base and having a predetermined angular field of illumination at least equal to the angular sector of each of the angularly adjacent sectors, said light source and reflector assembly being mounted to the mounting base to be angularly movable relative to the mounting base between a plurality of positions corresponding to the plurality of angularly adjacent sectors so as to be selectively directed in a direction in which the field of illumination covers an entire sector; a stepper motor associated with the light source and reflector assembly for rotating the light source assembly between said possible positions in response to activation of the sensor associated with a particular one of the adjacent sectors; and a microcontroller connected to said sensor device and to the stepper motor, the microcontroller being configured to receive separately an activation output from each of the plurality of sensors and to associate each of the angularly adjacent sectors with one of the plurality of sensors, the microcontroller being programmed to recognize from which one of the plurality of sensors an activation output is being received and to cause the stepper motor to receive a required number of electrical pulses to move the light source and reflector assembly angularly, as may be necessary, such that it becomes directed towards one of the sectors in which a sensor device was activated by detecting the presence of a person or moving object within that sector.