Wearable tactile display of softness for virtual reality

Human-machine interfaces are currently challenged by the lack of effective, comfortable and affordable actuation technologies for wearable tactile displays of softness in virtual-reality environments. They are especially needed for applications like virtual reality-based medical training, telerehabilitation, tele-manipulation, tele-presence, etc. The state of the art does not offer wearable devices that can combine proper functional properties with simple structure, low weight, low size and electrically safe operation. Recently, we described a tactile display technology that uses fingertip-mounted small inflatable chambers, pneumatically driven by a compact and cost-effective portable unit. Here, we present ongoing investigations on the tactile perception of softness that can be induced by this kind of display when it is used in combination with virtual-reality environments.