Abstract: A display device includes a flat-panel screen, an image capturing module, an eye tracking module, a screen rotating and tilting module, a flat-to-curve emulation module, and a flat-to-curve mechanical module. The display device employs the flat-to-curve emulation module to transform a rectangular flat image displayed by the flat-panel screen to a pincushion-like flat image according to a user's eye position; therefore, it may automatically provide the “emulated” curved image according to the user's eye position so that a user may perceive a visual effect like seeing a curved image. The display device further employs the flat-to-curve mechanical module to bend the flat-panel screen into a curved screen according to the user's eye position to bend the flat image displayed by the flat-panel screen into a curved image; therefore, it may automatically provide the “real” curved image according to the user's eye position to enhance the visual effect.