Carnegie Mellon shows solution for touch screens    
Among the various research projects, and technologies already applied to these devices, the one submitted by one of  the departments of Carnegie Mellon University, can be closer to help in the solution of this problem. The solution involves applying a layer of latex isolated to on the screen, where there are predefined forms (can be buttons, sets of pixels, etc.), that can inflat or deflat in order to create relief.

Read the article online, in Portuguese, from PC de Bolso.