Ticker tape (historical) Split-flap display (or simply flap display) Flip-disc display (or flip-dot display) Rollsign Tactile electronic displays (aka refreshable Braille display) are usually intended for the blind. They use electro-mechanical parts to dynamically update a tactile image (usually of text) so that the image may be felt by the fingers. Optacon, using metal rods instead of light in order to convey images to blind people by tactile sensation.