Development of aroma-Card based soundless Olfactory Display

Previously, mechanical devices have been used for the controlled release of aroma molecules. Therefore, noise associated with the operation of the device could not be avoided, prior to every transmission of aroma information. Moreover, as the aroma source was located inside or in the bottom of the device, it had a problem of odor components adhering to the device structure. In this research, we focus on a chemical container of temperature responsive hydrogel, which can have reversible phase transition between sol and gel, and controlled release of aroma by using a peltier module to control the temperature. With this approach, a soundless olfactory display was achieved. In addition, we tried to solve the problem of odor component adhesion by arranging a card-based aroma source on the top of the olfactory display. Having evaluated the usability of the card-based olfactory display, we were able to confirm its effectiveness and efficiency.