A capacitive touch panel sensor includes a plurality of driving-lines in a first direction, a plurality of sensing-lines in a second direction, a scan signal generator configured to generate a scan signal corresponding to at least one scan pulse, and to output the scan signal to the driving-lines, and a capacitance detector configured to receive a capacitance sensing signal output from the sensing-lines, and to detect a touched location based on the capacitance sensing signal, wherein the scan signal generator is configured to output the scan signal during first noise avoidance time periods, each first noise avoidance time period being in a respective horizontal time period of a display driving operation, and wherein the capacitance detector is configured to receive the capacitance sensing signal during the first noise avoidance time periods.