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

Claim 19:
20. An operating method of a touch controller configured to drive a touch sensor array comprising a plurality of sensing electrodes stacked on a display panel, and arranged in rows and columns, the operating method comprising:
providing respectively 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;
receiving 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;
selecting alternately the first noise voltage and the second noise voltage as a driving signal and outputting the driving signal;
receiving the driving signal from a first input terminal, and receiving 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
generating a sensing voltage based on the touch sensing signal and the driving signal.