Opportunity
The advancement of immersive media in virtual, augmented, and mixed reality (VR/AR/MR) environments has created a demand for integrating multisensory feedback, including taste, to enhance user experience. However, existing methods for generating virtual tastes face significant limitations. Chemical stimulation techniques, which apply flavouring agents directly to the tongue, often require bulky cartridges and chambers, making them cumbersome and difficult to maintain for a wide variety of tastes. Thermal stimulation methods, which alter tongue temperature to evoke certain sensations, are limited in the range of tastes they can produce and typically involve large, power-hungry components like liquid cooling pumps and Peltier modules, sacrificing portability. Electrical stimulation approaches using pulses can recreate basic tastes but struggle to achieve a broad spectrum of complex food flavors. More recent integrated systems combining chemical and electrical stimulation, such as those using ion electrophoresis, have been developed but often incorporate the human body as part of the circuit, leading to inconsistent taste experiences between users. Therefore, there is a clear market need for a stable, miniaturized, and portable virtual taste system that can reliably generate a wide variance of tastes without the drawbacks of existing bulky or inconsistent platforms.
Technology
This patent presents a portable virtual taste generator designed to overcome the flaws of existing systems. Its core innovation lies in a compact, wireless device that uses ion electrophoresis within conductive tastable gels to produce controlled taste sensations. The generator features a virtual taste interface with a housing, typically made of biocompatible Nylon, containing multiple taste generation channels. Each channel is filled with a conductive tastable gel, such as agarose, embedded with specific tastable chemical agents (e.g., sugar, salt, citric acid, or fruit flavors). A control system, including a microcontroller, wirelessly receives commands via a communication module like Bluetooth. It operates an array of switches (using MOSFETs) to independently control electrical currents flowing through each gel channel. When activated, the current causes the embedded tastable agents to be extruded onto the user's tongue via ion electrophoresis, generating a specific taste. The system is powered by a small battery and uses low-dropout regulators for safe, efficient voltage control, with operational safety limits (e.g., 2V for taste channels). The design incorporates flexible printed circuit boards with contact pins (e.g., platinum or silver) that connect to the gels, and the overall assembly is highly miniaturized, with a lollipop-like form factor for portability and intuitive use. This integration of multiple independently controllable taste channels within a wireless, lightweight package enables the generation of a wider and more reliable variety of tastes compared to prior methods.
Advantages
- Portability and Miniaturization: The device is entirely wireless, lightweight, and compact (e.g., ~8cm long), designed for easy use in immersive environments.
- Wide Taste Variety: Utilizes multiple independent channels with different embedded chemical agents, enabling the generation of a broad spectrum of basic and complex tastes (sweet, sour, salty, bitter, umami, and specific flavors like fruit).
- Stable and Consistent Performance: The closed-circuit design does not incorporate the human body as part of the driving circuit, leading to more consistent taste generation across different users compared to some prior systems.
- Precise Control: Taste feedback intensity and duration can be well-controlled by varying voltage input and operation time via the digital controller.
- Safety and Biocompatibility: Uses low-voltage operation (e.g., limited to 2V for taste channels) and biocompatible materials (Nylon housing, agarose gel, Pt/Ag contacts).
- Long Operation Time: Capable of providing taste feedback for extended periods (e.g., over one hour) on a single battery charge.
- Familiar and Intuitive Design: The lollipop shape makes it user-friendly and suitable for direct licking interaction.
Applications
- Immersive Entertainment: Enhancing VR/AR/MR experiences in gaming, simulations, and virtual tourism with realistic taste feedback.
- Digital Marketing and Advertising: Allowing users to "sample" food and beverage products virtually in e-commerce or promotional campaigns.
- Medical and Therapeutic Use: Potential applications in appetite stimulation for patients, taste rehabilitation therapy, or managing dietary restrictions.
- Education and Training: Used in culinary training, sensory education, or historical/cultural experiences involving food.
- Telepresence and Communication: Adding a taste dimension to future telepresence or social media interactions.
