Patent ID: 8188979

Claim:
A method of adjusting a voltage of a plurality of initial sensing signals output from a plurality of sensing units of a touch-sensitive display, the method comprising: selecting an initial sensing signal from initial sensing signals that is inputted; determining whether the voltage of the selected initial sensing signal is in a predetermined range; determining a region that the voltage of the initial sensing signal is in, wherein the region is one of a plurality of partitioned regions, the plurality of partitioned regions being above or below the predetermined range, determining a correction value according to the region, and starting an adjusting operation for adjustment of the initial sensing signal based on the correction value, when the voltage of the selected initial sensing signal is not in the predetermined range; determining whether the adjusting operation for the adjustment of the initial sensing signal has placed the initial sensing signal in the predetermined range; and stopping the adjustment of the initial sensing signal when the initial sensing signal is in the predetermined range.