Abstract:

All most all commercially available touch displays have no texture to touch. Introducing an element of texture in such displays would greatly enhance the experience of using the device. However most tactile displays currently built rely on pin based arrays which cannot be easily integrated into normal touch screens. In this project we reconstruct a haptic display for creating texture sensation through variations in surface friction using the squeeze film effect between a plate and a finger. The plate is actuated using piezoelectric ceramics. Ultrasonic vibrations are thus produced and are capable of generating the squeeze film effect. This enables us to simulate variable friction on the surface of the display plate. The base device being used is a Kindle Fire 1st Generation, on top which a glass plate is placed which is the surface that is vibrated to produce the squeeze film effect.