Patent ID: 8248383

Claim:
A touch screen, comprising: a plurality of conductive bars arranged in parallel to each other, each of the conductive bars including a single conductive layer with a substantially rectangular shape; and a touch screen controller coupled to the conductive bars, the controller configured to: apply a first excitation signal to a first end of one of the conductive bars and measure a first response signal corresponding to the first excitation signal at a second end of said one of the conductive bars, the touch screen controller configured to determine a position of a touch on said one of the conductive bars in a first direction along said one of the conductive bars based on a first difference between the first response signal and the first excitation signal; apply a second excitation signal to the second end of said one of the conductive bars and measure a second response signal at the first end of said one of the conductive bars, the touch screen controller configured to determine the position of the touch on said one of the conductive bars in the first direction along said one of the conductive bars based on the first difference between the first response signal and the first excitation signal and a second difference between the second response signal and the second excitation signal; and determine the positions of multiple touches on the touch screen that occur substantially simultaneously on different ones of the conductive bars.