A smartphone comprising: a cover layer; an LCD panel which is located under the cover layer and comprises a liquid crystal layer, and a first glass layer and a second glass layer between which the liquid crystal layer is placed, wherein at least a portion of a touch sensor which senses touch in a capacitive manner is located between the first glass layer and the second glass layer; and a backlight unit which is located under the LCD panel and comprises an optical film, a light source, a reflective sheet and a cover, wherein the backlight unit further comprises a pressure sensor (450, 460) attached on the cover between the reflective sheet and the cover, wherein the touch sensor comprises a plurality of drive electrodes and a plurality of receiving electrodes, wherein a drive unit is arranged to apply a driving signal to the touch sensor and a touch position is detected by a sensing signal which is outputted from the touch sensor, and wherein a magnitude of a touch pressure is based on a change in an amount of a capacitance which is outputted from the pressure sensor (450, 460), wherein a reference potential layer is located within the LCD panel, and wherein the change in the capacitance varies according to a distance between the pressure sensor (450, 460) and the reference potential layer, and wherein the reference potential layer is a potential layer of a common electrode within the LCD panel. a cover layer; an LCD panel which is located under the cover layer and comprises a liquid crystal layer, and a first glass layer and a second glass layer between which the liquid crystal layer is placed, wherein at least a portion of a touch sensor which senses touch in a capacitive manner is located between the first glass layer and the second glass layer; and a backlight unit which is located under the LCD panel and comprises an optical film, a light source, a reflective sheet and a cover, wherein the backlight unit further comprises a pressure sensor (450, 460) attached on the cover between the reflective sheet and the cover, wherein the touch sensor comprises a plurality of drive electrodes and a plurality of receiving electrodes, wherein a drive unit is arranged to apply a driving signal to the touch sensor and a touch position is detected by a sensing signal which is outputted from the touch sensor, and wherein a magnitude of a touch pressure is based on a change in an amount of a capacitance which is outputted from the pressure sensor (450, 460), wherein a reference potential layer is located within the LCD panel, and wherein the change in the capacitance varies according to a distance between the pressure sensor (450, 460) and the reference potential layer, and wherein the reference potential layer is a potential layer of a common electrode within the LCD panel. wherein the backlight unit further comprises a pressure sensor (450, 460) attached on the cover between the reflective sheet and the cover, wherein the touch sensor comprises a plurality of drive electrodes and a plurality of receiving electrodes, wherein a drive unit is arranged to apply a driving signal to the touch sensor and a touch position is detected by a sensing signal which is outputted from the touch sensor, and wherein a magnitude of a touch pressure is based on a change in an amount of a capacitance which is outputted from the pressure sensor (450, 460), wherein a reference potential layer is located within the LCD panel, and wherein the change in the capacitance varies according to a distance between the pressure sensor (450, 460) and the reference potential layer, and wherein the reference potential layer is a potential layer of a common electrode within the LCD panel.