A liquid crystal display device comprising: a liquid crystal display panel having an in-cell type touch panel, the liquid crystal display panel comprising: gate lines (GL1,..., GLg) configured to transfer a gate pulse (GP1,..., GPg); data lines (DL1,..., DLd) configured to transfer a data voltage; first touch electrodes configured to be parallel to the gate lines (GL1,..., GLg), to serve as a common electrode and to serve as a touch sensing structure; second touch electrodes configured to be perpendicular to the gate lines (GL1,..., GLg), to serve as a common electrode and to serve as a touch sensing structure; and only one dummy gate line configured to be parallel to the gate lines (GL1,..., GLg) and overlapping the second touch electrodes via an insulating film therebetween; a touch sensing unit that supplies a common voltage (Vcom) to the first touch electrodes and the second touch electrodes during an image display period, and that sequentially supplies a touch drive signal to the first touch electrodes or the second touch electrodes, receives the sensed signals transmitted from the first touch electrodes or the second touch electrodes, and determines whether a touch contact or operation has occurred during a touch sensing period; and a gate driver that sequentially outputs gate pulses (GP1,..., GPg) to the gate lines (GL1,..., GLg) during the image display period, and that outputs dummy gate pulses having an inverted waveform of the gate pulses (GP1,..., GPg) to the dummy gate line whenever the gate pulses (GP1,..., GPg) are output to the gate lines (GL1,..., GLg) wherein the gate driver is configured to allow a coupling effect of the gate pulses (GP1,..., GPg) that affect the second touch electrodes to be effectively canceled by a coupling effect of the dummy gate pulses that affect the second touch electrodes due to said dummy gate line being configured to overlap all of the second touch electrodes, to effectively suppress variations in pixel voltage due to variations in the common voltage (Vcom) supplied to the first touch electrodes and second touch electrodes. a liquid crystal display panel having an in-cell type touch panel, the liquid crystal display panel comprising: gate lines (GL1,..., GLg) configured to transfer a gate pulse (GP1,..., GPg); data lines (DL1,..., DLd) configured to transfer a data voltage; first touch electrodes configured to be parallel to the gate lines (GL1,..., GLg), to serve as a common electrode and to serve as a touch sensing structure; second touch electrodes configured to be perpendicular to the gate lines (GL1,..., GLg), to serve as a common electrode and to serve as a touch sensing structure; and only one dummy gate line configured to be parallel to the gate lines (GL1,..., GLg) and overlapping the second touch electrodes via an insulating film therebetween; gate lines (GL1,..., GLg) configured to transfer a gate pulse (GP1,..., GPg); data lines (DL1,..., DLd) configured to transfer a data voltage; first touch electrodes configured to be parallel to the gate lines (GL1,..., GLg), to serve as a common electrode and to serve as a touch sensing structure; second touch electrodes configured to be perpendicular to the gate lines (GL1,..., GLg), to serve as a common electrode and to serve as a touch sensing structure; and only one dummy gate line configured to be parallel to the gate lines (GL1,..., GLg) and overlapping the second touch electrodes via an insulating film therebetween; a touch sensing unit that supplies a common voltage (Vcom) to the first touch electrodes and the second touch electrodes during an image display period, and that sequentially supplies a touch drive signal to the first touch electrodes or the second touch electrodes, receives the sensed signals transmitted from the first touch electrodes or the second touch electrodes, and determines whether a touch contact or operation has occurred during a touch sensing period; and a gate driver that sequentially outputs gate pulses (GP1,..., GPg) to the gate lines (GL1,..., GLg) during the image display period, and that outputs dummy gate pulses having an inverted waveform of the gate pulses (GP1,..., GPg) to the dummy gate line whenever the gate pulses (GP1,..., GPg) are output to the gate lines (GL1,..., GLg) wherein the gate driver is configured to allow a coupling effect of the gate pulses (GP1,..., GPg) that affect the second touch electrodes to be effectively canceled by a coupling effect of the dummy gate pulses that affect the second touch electrodes due to said dummy gate line being configured to overlap all of the second touch electrodes, to effectively suppress variations in pixel voltage due to variations in the common voltage (Vcom) supplied to the first touch electrodes and second touch electrodes.