A display apparatus for a vehicle comprising: a display unit; an optical sensor unit configured to emit and receive light; a touch sensor unit disposed on or below a surface of the display unit; and a processor configured to (i) determine whether a hand is located within a first distance range away from the display unit, the optical sensor unit being configured to recognize the received light based on the hand being located within the first distance range, and to (ii) determine whether the hand is located within a second distance range away from the display unit that is closer to the display unit than the first distance range, the touch sensor unit being configured to sense the hand based on the hand being located within the second distance range, characterised in that the processor is configured to switch on the touch sensor unit, based on a determination that the hand has transitioned from being located within the first distance range to being located within the second distance range, wherein the processor is configured to calculate a distance information of the hand using magnitude or amplitude of electrical signals from the optical sensor unit which are caused by the hand located within the first distance range, wherein the processor is configured to calculate position information and distance information of the hand using capacitance change sensed by the touch sensor unit based on the hand being located within the second distance range and not in contact with the display unit, wherein the processor is configured to calculate position information and distance information of the hand using capacitance change sensed by the touch sensor unit based on the hand being located within a third distance range away from the display unit that is closer to the display unit than the second distance range, wherein the processor is configured to calculate a distance between the hand and the display unit and to correspondingly change a size of a plurality of touch sensing cells by changing a number of electrodes effectively constituting the touch sensing cells in the touch sensor unit according to the calculated distance of the hand, wherein the processor is configured to set, based on determining that the hand is located within the second distance range, the size of the plurality of touch sensing cells to be a first size, and the processor is configured to set, based on determining that the hand is located within the third distance range, the size of touch sensing cells to be a second size that is smaller than the first size. a display unit; an optical sensor unit configured to emit and receive light; a touch sensor unit disposed on or below a surface of the display unit; and a processor configured to (i) determine whether a hand is located within a first distance range away from the display unit, the optical sensor unit being configured to recognize the received light based on the hand being located within the first distance range, and to (ii) determine whether the hand is located within a second distance range away from the display unit that is closer to the display unit than the first distance range, the touch sensor unit being configured to sense the hand based on the hand being located within the second distance range, characterised in that the processor is configured to switch on the touch sensor unit, based on a determination that the hand has transitioned from being located within the first distance range to being located within the second distance range, wherein the processor is configured to calculate a distance information of the hand using magnitude or amplitude of electrical signals from the optical sensor unit which are caused by the hand located within the first distance range, wherein the processor is configured to calculate position information and distance information of the hand using capacitance change sensed by the touch sensor unit based on the hand being located within the second distance range and not in contact with the display unit, wherein the processor is configured to calculate position information and distance information of the hand using capacitance change sensed by the touch sensor unit based on the hand being located within a third distance range away from the display unit that is closer to the display unit than the second distance range, wherein the processor is configured to calculate a distance between the hand and the display unit and to correspondingly change a size of a plurality of touch sensing cells by changing a number of electrodes effectively constituting the touch sensing cells in the touch sensor unit according to the calculated distance of the hand, wherein the processor is configured to set, based on determining that the hand is located within the second distance range, the size of the plurality of touch sensing cells to be a first size, and the processor is configured to set, based on determining that the hand is located within the third distance range, the size of touch sensing cells to be a second size that is smaller than the first size.