A touch sensor comprising: a plurality of parallel transmitting lines extending in a first direction; a plurality of parallel receiving lines extending in a second direction crossing the first direction; a transmitting driver configured to: in a first mode, apply first driving signals of a first voltage, to the plurality of transmitting lines; and in a second mode, apply second driving signals of a second voltage, to the plurality of transmitting lines; and a signal output unit configured to receive touch signals from the plurality of receiving lines, and characterized in that: the second voltage is greater than the first voltage, wherein the transmitting driver is further configured to, in the first mode, sequentially apply one of the first driving signals of the first voltage, to each of the plurality of transmitting lines, wherein the transmitting driver comprises a plurality of transmitting groups (120a, 120b, 120c, 120d, 120e) disposed in the second direction, wherein each of the plurality of transmitting groups comprises adjacent ones of the plurality of transmitting lines, and wherein the transmitting driver is further configured to, in the second mode, sequentially apply the second driving signals of the second voltage, to each of the plurality of transmitting groups, wherein the signal output unit comprises a plurality of receiving groups (130a, 130b, 130c, 130d, 130e) disposed in the first direction, and wherein each of the plurality of receiving groups comprises adjacent ones of the plurality of receiving lines, and wherein the signal output unit comprises: a plurality of first receiving circuits disposed to correspond to the plurality of receiving lines, respectively; and a plurality of second receiving circuits, wherein each of the plurality of second receiving circuits is disposed to correspond to a respective one of the plurality of receiving groups. a plurality of parallel transmitting lines extending in a first direction; a plurality of parallel receiving lines extending in a second direction crossing the first direction; a transmitting driver configured to: in a first mode, apply first driving signals of a first voltage, to the plurality of transmitting lines; and in a second mode, apply second driving signals of a second voltage, to the plurality of transmitting lines; and in a first mode, apply first driving signals of a first voltage, to the plurality of transmitting lines; and in a second mode, apply second driving signals of a second voltage, to the plurality of transmitting lines; and a signal output unit configured to receive touch signals from the plurality of receiving lines, and characterized in that: the second voltage is greater than the first voltage, wherein the transmitting driver is further configured to, in the first mode, sequentially apply one of the first driving signals of the first voltage, to each of the plurality of transmitting lines, wherein the transmitting driver comprises a plurality of transmitting groups (120a, 120b, 120c, 120d, 120e) disposed in the second direction, wherein each of the plurality of transmitting groups comprises adjacent ones of the plurality of transmitting lines, and wherein the transmitting driver is further configured to, in the second mode, sequentially apply the second driving signals of the second voltage, to each of the plurality of transmitting groups, wherein the signal output unit comprises a plurality of receiving groups (130a, 130b, 130c, 130d, 130e) disposed in the first direction, and wherein each of the plurality of receiving groups comprises adjacent ones of the plurality of receiving lines, and wherein the signal output unit comprises: a plurality of first receiving circuits disposed to correspond to the plurality of receiving lines, respectively; and a plurality of second receiving circuits, wherein each of the plurality of second receiving circuits is disposed to correspond to a respective one of the plurality of receiving groups. the second voltage is greater than the first voltage, wherein the transmitting driver is further configured to, in the first mode, sequentially apply one of the first driving signals of the first voltage, to each of the plurality of transmitting lines, wherein the transmitting driver comprises a plurality of transmitting groups (120a, 120b, 120c, 120d, 120e) disposed in the second direction, wherein each of the plurality of transmitting groups comprises adjacent ones of the plurality of transmitting lines, and wherein the transmitting driver is further configured to, in the second mode, sequentially apply the second driving signals of the second voltage, to each of the plurality of transmitting groups, wherein the signal output unit comprises a plurality of receiving groups (130a, 130b, 130c, 130d, 130e) disposed in the first direction, and wherein each of the plurality of receiving groups comprises adjacent ones of the plurality of receiving lines, and wherein the signal output unit comprises: a plurality of first receiving circuits disposed to correspond to the plurality of receiving lines, respectively; and a plurality of second receiving circuits, wherein each of the plurality of second receiving circuits is disposed to correspond to a respective one of the plurality of receiving groups. a plurality of first receiving circuits disposed to correspond to the plurality of receiving lines, respectively; and a plurality of second receiving circuits, wherein each of the plurality of second receiving circuits is disposed to correspond to a respective one of the plurality of receiving groups.