Abstract
This paper introduces the system which enables a user not only to interact with a computer by moving one's hand in midair but also to feel touch feedback on one's hand. It would be used as an interface with PCs, games, portable devices, digital signage, and so on. It is also promising in hospitals, food factories, and public spaces. The system consists of a PC, a hand tracker for input, and a tactile display for feedback. The hand tracker uses a depth camera and needs no markers attached on one's hand. The tactile display utilizes ultrasound to produce tactile feedback from a distance. Owing to them, a user does not need to put any devices on one's hand in using the system. The principles are described and the prototype system is presented.
