FIG. 2A illustrates a sectional view of a structure of a touch screen according to a first exemplary embodiment of the present invention, and FIG. 2B is a plan view of the touch screen shown in FIG. 2A. Referring to FIGS. 2A and 2B, the touch screen 200 includes picture means 220 for providing a user with pictorial information (i.e. a display), and an optical module 210 for emitting rays to an upp