Patent ID: 8976124
Filing Date: 2015-03-10
Classification: G06F,G09G,H03K

Abstract:
1. A method comprising: providing a two-dimensional capacitance sense array comprising rows of capacitive sense elements and columns of capacitive sense elements; coupling a group of capacitive sense elements from at least one of the rows or the columns together when in a first mode; coupling a first capacitance sensor to the group when in the first mode; measuring, by the first capacitance sensor, a collective capacitance on the group when in the first mode to detect a presence of a conductive object proximate to the group; upon detection of the presence of the conductive object, switching to a second mode; individually coupling the first capacitance sensor to each of the rows or columns when in the second mode; and individually measuring, by the first capacitance sensor, capacitances on each of the rows and the columns when in the second mode.