A display device comprising a light guide (12), a back plate (14), a flexible element (15) arranged in between said light guide (12) and said back plate (14), and addressable electrodes (23) for inducing electrostatic forces on said element (15) a for bringing selected portions of said element (15) into...http://www.google.com/patents/US20060291774?utm_source=gb-gplus-sharePatent US20060291774 - Foil display
