A display device, comprising: a display panel for displaying an image; a back cover provided behind the display panel and coupled to the display panel; a bending assembly coupled to the back cover to bend the back cover, the bending assembly comprises a bending actuator that applies physical force to the back cover and the back cover is used to bend the display panel, and a controller configured to control the bending assembly to apply a physical force to the back cover to bend the display panel a prescribed amount, characterized in that the bending actuator includes a plurality of elastic members formed of shape memory alloy that expands or contracts corresponding to a change in temperature of the shape memory alloy, the plurality of elastic members extend laterally across on the back cover and are arranged to be vertically apart from each other, such that the shape memory alloy expands or contracts laterally with respect to the back cover, wherein the display device further comprises: a bracket coupled to a rear of the back cover; a printed circuit board coupled to a rear of the bracket; a first fastener provided between the bracket and the back cover to couple the back cover to the bracket along a central vertical axis of the display panel; a second fastener provided between the bracket and the printed circuit board to couple the printed circuit board to the bracket along a lateral side of the printed circuit board; and a third fastener provided between the bracket and the back cover to couple a lateral region of the back cover to the bracket, wherein the third fastener includes: a first portion coupled to the back cover; and a second portion coupled to the bracket, wherein the first portion is movably coupled to the second portion to allow lateral movement of the back cover relative to the bracket. a display panel for displaying an image; a back cover provided behind the display panel and coupled to the display panel; a bending assembly coupled to the back cover to bend the back cover, the bending assembly comprises a bending actuator that applies physical force to the back cover and the back cover is used to bend the display panel, and a controller configured to control the bending assembly to apply a physical force to the back cover to bend the display panel a prescribed amount, characterized in that the bending actuator includes a plurality of elastic members formed of shape memory alloy that expands or contracts corresponding to a change in temperature of the shape memory alloy, the plurality of elastic members extend laterally across on the back cover and are arranged to be vertically apart from each other, such that the shape memory alloy expands or contracts laterally with respect to the back cover, wherein the display device further comprises: a bracket coupled to a rear of the back cover; a printed circuit board coupled to a rear of the bracket; a first fastener provided between the bracket and the back cover to couple the back cover to the bracket along a central vertical axis of the display panel; a second fastener provided between the bracket and the printed circuit board to couple the printed circuit board to the bracket along a lateral side of the printed circuit board; and a third fastener provided between the bracket and the back cover to couple a lateral region of the back cover to the bracket, wherein the third fastener includes: a first portion coupled to the back cover; and a second portion coupled to the bracket, wherein the first portion is movably coupled to the second portion to allow lateral movement of the back cover relative to the bracket. a bracket coupled to a rear of the back cover; a printed circuit board coupled to a rear of the bracket; a first fastener provided between the bracket and the back cover to couple the back cover to the bracket along a central vertical axis of the display panel; a second fastener provided between the bracket and the printed circuit board to couple the printed circuit board to the bracket along a lateral side of the printed circuit board; and a third fastener provided between the bracket and the back cover to couple a lateral region of the back cover to the bracket, wherein the third fastener includes: a first portion coupled to the back cover; and a second portion coupled to the bracket, wherein the first portion is movably coupled to the second portion to allow lateral movement of the back cover relative to the bracket. a first portion coupled to the back cover; and a second portion coupled to the bracket, wherein the first portion is movably coupled to the second portion to allow lateral movement of the back cover relative to the bracket.