Microsoft Corporation
Driving signals for capacitive touch-sensitive surface

Abstract:

A touch-sensitive device, including a capacitive touch-sensitive surface including an array of electrodes. The touch-sensitive device may further include processing circuitry configured to determine a detected position at which a stylus contacts or hovers above the capacitive touch-sensitive surface. The processing circuitry may determine, based at least in part on the detected position, a first and second electrode set of the electrodes included in the array. The detected position may be located proximate to one or more first row electrodes and/or one or more first column electrodes included in the first electrode set. The second electrode set may include a plurality of second row electrodes and a plurality of second column electrodes not included in the first electrode set. The touch-sensitive device may further include a driving circuit configured to transmit a first driving signal to the first electrode set and a second driving signal to the second electrode set.