Patent ID: 8310464

Claim:
An apparatus for detecting a touch, the apparatus comprising: a touch screen having: a first sheet having a first set of set of resistive strips, wherein each resistive strip from the first set forms a column; and a second sheet having a second set of resistive strips, wherein each resistive strip from the second set forms a row, wherein the first and second sheet are substantially parallel to one another separated from each other by a plurality of spacers, wherein the first and second sets of substantially perpendicular to one another; and a controller having: an analog-to-digital converter (ADC) that is configured to switchably and sequentially coupled to each of the plurality of columns and to each of the plurality of rows; and a voltage source that is configured to be switchably and sequentially coupled to each of the plurality of columns and the plurality of rows, wherein the controller is adapted to couple the voltage source to one of the plurality of rows when the ADC is sequentially coupled to each of the plurality of columns and to couple the voltage source to one of the plurality of columns when the analog to digital converter is sequentially coupled to each of the plurality of rows, and wherein the first and second sets of resistive strips form an analog matrix having a resolution that is greater than the number of resistive strips in the first set multiplied by the number of resistive strips in the second set.