Graphical Tactile Display

January 1st, 2005 | Filed under: Design, Fabrication Tech, Technology | No Comments »

Blind touch

The displays use metallic films featuring various shape memory alloys which are produced layer by layer on silicon wafers using thin film technology. Display pixels are generated when the metallic film adjusts its curvature partially, similarly to bimetal snap plates for temperature switches. The movement of the films is then transferred to the touch panel via plastic pins und thus can be detected by the user. The combination of shape memory alloys is innovative. It enables switching the film to stable positions using different heat pulses without a permanent heat supply. Thus, only the switching operation requires electric current, whereas maintaining the status does not.

via Engadget / Daily Science News



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