A display apparatus comprising: a panel including a plurality of data lines (DL1,..., DLd), a plurality of touch electrodes disposed in a display area, two or more gate connection lines (VCCL, VGLL, VGHL, GNDL) disposed in a non-display area outside the display area and connected to a gate driver circuit, and additional supply lines disposed in the non-display area and comprising supply lines adjacent to the gate connection lines (VCCL, VGLL, VGHL, GNDL) and supply lines adjacent to an outermost portion among touch electrode lines (TL1,...,TLt) connected to the plurality of touch electrodes and the plurality of data lines (DL1,..., DLd); a driver integrated circuit configured to supply a touch signal to the plurality of touch electrodes during a touch sensing period; a touch auxiliary signal supply circuit configured to supply a touch auxiliary signal to the data plurality of data lines (DL1,..., DLd) during the touch sensing period, wherein the gate driver circuit is configured to receive another touch auxiliary signal from the touch auxiliary signal supply circuit via a first one of the two or more gate connection lines (VCCL, VGLL, VGHL, GNDL) to supply the received another touch auxiliary signal to a plurality of gate lines of the display apparatus during the touch sensing period; a printed circuit board electrically connected to the panel; a connection film connected to the panel and the printed circuit board, wherein the connection film comprises respective portions of the two or more gate connection lines (VCCL, VGLL, VGHL, GNDL) between the touch auxiliary signal supply circuit and the gate driver circuit and respective portions of the additional supply lines, and wherein the touch auxiliary signal supply circuit is configured to apply the touch auxiliary signal to the additional supply lines during the touch sensing period, wherein the touch auxiliary signal has a phase and a potential difference which are the same as a phase and a potential difference, respectively, of the touch signal supplied to the plurality of touch electrodes, and wherein the touch auxiliary signal and the touch signal have the same high levels and the same low levels; and apply another touch auxiliary signal to at least said first one of the two or more gate connection lines (VCCL, VGLL, VGHL, GNDL) during the touch sensing period, wherein the another touch auxiliary signal has a phase and a potential difference which are the same as a phase and a potential difference, respectively, of the touch signal supplied to the plurality of touch electrodes, and wherein the another touch auxiliary signal and the touch signal have different high levels and different low levels. a panel including a plurality of data lines (DL1,..., DLd), a plurality of touch electrodes disposed in a display area, two or more gate connection lines (VCCL, VGLL, VGHL, GNDL) disposed in a non-display area outside the display area and connected to a gate driver circuit, and additional supply lines disposed in the non-display area and comprising supply lines adjacent to the gate connection lines (VCCL, VGLL, VGHL, GNDL) and supply lines adjacent to an outermost portion among touch electrode lines (TL1,...,TLt) connected to the plurality of touch electrodes and the plurality of data lines (DL1,..., DLd); a driver integrated circuit configured to supply a touch signal to the plurality of touch electrodes during a touch sensing period; a touch auxiliary signal supply circuit configured to supply a touch auxiliary signal to the data plurality of data lines (DL1,..., DLd) during the touch sensing period, wherein the gate driver circuit is configured to receive another touch auxiliary signal from the touch auxiliary signal supply circuit via a first one of the two or more gate connection lines (VCCL, VGLL, VGHL, GNDL) to supply the received another touch auxiliary signal to a plurality of gate lines of the display apparatus during the touch sensing period; a printed circuit board electrically connected to the panel; a connection film connected to the panel and the printed circuit board, wherein the connection film comprises respective portions of the two or more gate connection lines (VCCL, VGLL, VGHL, GNDL) between the touch auxiliary signal supply circuit and the gate driver circuit and respective portions of the additional supply lines, and wherein the touch auxiliary signal supply circuit is configured to apply the touch auxiliary signal to the additional supply lines during the touch sensing period, wherein the touch auxiliary signal has a phase and a potential difference which are the same as a phase and a potential difference, respectively, of the touch signal supplied to the plurality of touch electrodes, and wherein the touch auxiliary signal and the touch signal have the same high levels and the same low levels; and apply another touch auxiliary signal to at least said first one of the two or more gate connection lines (VCCL, VGLL, VGHL, GNDL) during the touch sensing period, wherein the another touch auxiliary signal has a phase and a potential difference which are the same as a phase and a potential difference, respectively, of the touch signal supplied to the plurality of touch electrodes, and wherein the another touch auxiliary signal and the touch signal have different high levels and different low levels.