A display device with integrated touch screen, comprising: a panel comprising a plurality of driving electrodes and a plurality of sensing electrodes; a touch IC adapted for generating a first driving pulse, and determining whether there is a touch by using a plurality of sensing signals generated by the respective sensing electrodes; and a display driver IC adapted for applying a first common voltage (Vcom_TX) to the driving electrodes and applying a second common voltage (Vcom_RX) different from the first common voltage (Vcom_TX) to the sensing electrodes when the panel operates in a display driving mode and, when the panel operates in a touch driving mode, generating a second driving pulse with the first driving pulse to apply the second driving pulse to the driving electrodes and receiving the sensing signals from the respective sensing electrodes to transfer the sensing signals to the touch IC, wherein the display driver IC comprises a sync generator adapted for generating a sync signal indicating a driving mode of the panel, the sync signal including a first sync signal indicating the display driving mode and a second sync signal indicating the touch driving mode, and a driving pulse generator adapted for changing the first driving pulse to the second driving pulse so as to become a maximum voltage (VTX_HIGH) and minimum voltage (VTX_LOW) of the second driving pulse in a maximum-value section and minimum-value section of the first driving pulse, and wherein the touch IC comprises a sensing unit adapted for sensing the touch, a touch sensing reference voltage (VRX_REF) applied to the sensing unit being equal to the minimum voltage (VTX_LOW) of the second driving pulse. a panel comprising a plurality of driving electrodes and a plurality of sensing electrodes; a touch IC adapted for generating a first driving pulse, and determining whether there is a touch by using a plurality of sensing signals generated by the respective sensing electrodes; and a display driver IC adapted for applying a first common voltage (Vcom_TX) to the driving electrodes and applying a second common voltage (Vcom_RX) different from the first common voltage (Vcom_TX) to the sensing electrodes when the panel operates in a display driving mode and, when the panel operates in a touch driving mode, generating a second driving pulse with the first driving pulse to apply the second driving pulse to the driving electrodes and receiving the sensing signals from the respective sensing electrodes to transfer the sensing signals to the touch IC, wherein the display driver IC comprises a sync generator adapted for generating a sync signal indicating a driving mode of the panel, the sync signal including a first sync signal indicating the display driving mode and a second sync signal indicating the touch driving mode, and a driving pulse generator adapted for changing the first driving pulse to the second driving pulse so as to become a maximum voltage (VTX_HIGH) and minimum voltage (VTX_LOW) of the second driving pulse in a maximum-value section and minimum-value section of the first driving pulse, and wherein the touch IC comprises a sensing unit adapted for sensing the touch, a touch sensing reference voltage (VRX_REF) applied to the sensing unit being equal to the minimum voltage (VTX_LOW) of the second driving pulse.