Patent ID: 8593424

Claim:
A device comprising: a graphical display; a sensing area-defined on a surface of a substrate that overlays the graphical display, the graphical display being visible through the sensing area; and a plurality of sensing cells arranged in the sensing area in a plurality of rows and columns, the sensing cells being configured to sense a position of an object within the sensing area, each of the sensing cells comprising a row-sensing electrode and a column-sensing electrode, the row-sensing electrode of each of one or more of the sensing cells being continuous with respect to the row-sensing electrode of each of one or more of the sensing cells adjacent to it in its row, the column-sensing electrode of each of one or more of the sensing cells being continuous with respect to the column-sensing electrode of each of one or more of the sensing cells adjacent to it in its column, the column-sensing electrode and the row-sensing electrode in each sensing cell being spirally interleaved with one another; and a processor in communication with the plurality of sensing cells and operable to correlate the position of the object within the sensing area with a virtual button associated with the graphical display.