A display device comprising: a housing; at least one roller positioned within the housing; and a display portion comprising a display panel and a module cover; and an operating portion comprising a top bar attached to the display portion, a plurality of supports configured to raise or lower the top bar, and a motor assembly configured to ascend or descend the plurality of supports, one end of the supports being connected to either end of the top bar and the other end being attached to the motor assembly, wherein the display panel and the module cover are either in a first state where the display panel and the module cover are kept wound around the at least one roller or in a second state where the display panel and the module cover are kept unwound from the at least one roller, in contact with each other, and exposed out of the housing, and wherein each support comprises: an upper link including one end connected to either end of the top bar; an elongated hinge with a center part between two opposite ends, the hinge being connected to the other end of the upper link; and a lower link including one end connected to the hinge and the other end connected to the motor assembly, characterized in that the upper link includes a first upper link and a second upper link, and the lower link includes a first lower link and a second lower link, wherein the first upper link and the first lower link are both connected at one end to the center part of the hinge where both are in the shape of gears meshing with each other, and the second upper link is connected to one end of the hinge and the second lower link is connected to the other end of the hinge. a housing; at least one roller positioned within the housing; and a display portion comprising a display panel and a module cover; and an operating portion comprising a top bar attached to the display portion, a plurality of supports configured to raise or lower the top bar, and a motor assembly configured to ascend or descend the plurality of supports, one end of the supports being connected to either end of the top bar and the other end being attached to the motor assembly, wherein the display panel and the module cover are either in a first state where the display panel and the module cover are kept wound around the at least one roller or in a second state where the display panel and the module cover are kept unwound from the at least one roller, in contact with each other, and exposed out of the housing, and wherein each support comprises: an upper link including one end connected to either end of the top bar; an elongated hinge with a center part between two opposite ends, the hinge being connected to the other end of the upper link; and a lower link including one end connected to the hinge and the other end connected to the motor assembly, characterized in that the upper link includes a first upper link and a second upper link, and the lower link includes a first lower link and a second lower link, wherein the first upper link and the first lower link are both connected at one end to the center part of the hinge where both are in the shape of gears meshing with each other, and the second upper link is connected to one end of the hinge and the second lower link is connected to the other end of the hinge. an upper link including one end connected to either end of the top bar; an elongated hinge with a center part between two opposite ends, the hinge being connected to the other end of the upper link; and a lower link including one end connected to the hinge and the other end connected to the motor assembly, characterized in that the upper link includes a first upper link and a second upper link, and the lower link includes a first lower link and a second lower link, wherein the first upper link and the first lower link are both connected at one end to the center part of the hinge where both are in the shape of gears meshing with each other, and the second upper link is connected to one end of the hinge and the second lower link is connected to the other end of the hinge.