Patent 7161486 was granted and assigned to Rolls-Royce on January, 2007 by the United States Patent and Trademark Office.
A sensor 10 comprises an array of electrostatic sensor elements 12, each centred at a respective sensing position 14. Each element produces a respective output signal at 16. The outputs 16 can be used to drive respective pixels of a display. This allows an image to be created to represent the electrostatic charge distribution across the region to which the sensor is directed.