Patent ID: 11960680
Assignee: SAMSUNG ELECTRONICS CO., LTD.
Field: Computer technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 0:
1. A touch controller stacked on a display panel, and configured to drive a touch sensor array comprising a plurality of sensing electrodes arranged in rows and columns, the touch controller comprising:
a noise detection circuit configured to respectively provide a first reference voltage and a second reference voltage for detecting display noise to a first electrode and a second electrode arranged on lines except a line on which touch sensing is performed, among the plurality of sensing electrodes, the second reference voltage being different from the first reference voltage;
a driving signal generation circuit configured to receive a first noise voltage and a second noise voltage generated based on the first reference voltage and the second reference voltage from the first electrode and the second electrode, respectively, and alternately select the first noise voltage and the second noise voltage as a driving signal and output the driving signal; and
a receiving circuit configured to receive the driving signal via a first input terminal, receive a touch sensing signal generated based on the driving signal via a second input terminal connected to a third electrode arranged on the line on which touch sensing is performed, among the plurality of sensing electrodes, and generate a sensing voltage based on the touch sensing signal and the driving signal.