I looked into that a few times. I wanted to make a tactile grid so a person could feel a video picture on their forehead or abdomen. You would want to process the video so that only outlines would be displayed, door frame, chair, etc. Small electrical pulses from a wire mesh won't work because you don't just feel it at the wire intersections. I thought of little solenoids, like from a dot matrix printer or piezo vibrators but any kind of decent resolution would get heavy and sweat would gum up the works. 320 x 240 resolution would require 76800 solenoids or piezo vibrators. Only a robot could wire that thing.
But don't let me stop you. It kept my brain occupied for a while.
Good luck.