Patent ID: 8754871

Claim:
A touch sensing device, comprising: an electrode matrix, comprising a plurality of driving lines and a plurality of sensing lines, wherein each driving line crosses each sensing line to form a coupling node; a first switching unit configured to connect the driving lines; a second switching unit, comprising a plurality of switches, wherein one end of each switch connects to the corresponding sensing line, and the other end of each switch connects to a common point; and a sensing circuit configured to connect to the common point; wherein, in a first scanning stage, the switches are closed in sequence by at least two switches each time, and the sensing circuit determines whether there is a change in capacitance at least at one of the driving lines; in a second scanning stage, the switches are closed in sequence by one switch each time, and the sensing circuit determines whether there is a change in capacitance at least on one of the coupling nodes of the driving line where the change in capacitance was determined.