Patent ID: 7097532

Claim:
A mobile device with color discrimination suitable for producing a physical action in response to the detection of a color on an action surface, said mobile device comprising: a mobile body having a first wheel, a second wheel, and a third point of contact with the action surface; means for executing the physical action; a color detection module attached to said mobile body for producing color detection signals in response to detecting colors on the action surface, said color detection module including a broad spectrum illumination source with a source lens, said illumination source for producing a spot of light on the action surface; a photodetector with a bandpass filter, said photodetector for receiving light reflected from said spot of light and transmitted through said bandpass filter; a second photodetector with a second bandpass filter, said second photodetector for receiving light reflected from said spot of light and transmitted through said second bandpass filter; an electronics module for receiving color detection signals and to produce the physical action in response thereto, said electronics module including a comparator circuit in electronic communication with said photodetector; a second comparator circuit in electronic communication with said second photodetector; and a microcircuit in electronic communication with said comparator circuit and said second comparator circuit, said microcircuit further in communication with said means for executing the physical action.