Apparatus and methods for extended refreshable tactile graphic display are disclosed, the apparatus including an array of pins at a display surface, with pin setting actuators and display surface matrix preferably being separable units. The display matrix is provided by stacked functional layers, functions...http://www.google.de/patents/US20030151597?utm_source=gb-gplus-sharePatent US20030151597 - Extended refreshable tactile graphic array for scanned tactile display
