Integrating a projection-based olfactory display with interactive audio-visual contents

Recently, olfactory interfaces, in addition to visual, auditory, and haptic interfaces, have been examined to enhance the sensation of presence for virtual reality. We have proposed the concept of “projection-based olfactory display” and have developed several prototype systems to realize this concept. A projection-based olfactory display applies the principle of vortex rings launched from an air cannon to deliver a small amount of scented air through free space from a nearby location to the user’s nose. The characteristics of projection-based olfactory displays offer strong potential in combination with traditional TV sets and desktop PC environments at home. In our latest prototype system, we implemented cartridge-type units to store the scent source and generate scented air of specific content. This approach allows users to freely choose among scent contents by simply replacing the cartridge. We also developed an interactive application that integrates our olfactory display with game-like, interactive audio-visual content.