Researchers have developed a ring-shaped mouse called picoRing that simplifies the control of Augmented Reality (AR) glasses. The device can operate continuously for 30 days on a single charge.
While traditional computer mice have been the most fundamental tool for digital interaction for years, the need for more natural input methods is increasing as technology becomes more portable and wearable. In this context, researchers at the University of Tokyo have developed a new wearable controller that could make Augmented Reality (AR) technologies more intuitive and energy-efficient. Named “picoRing,” this ring-shaped wireless mouse weighs just 5 grams and offers up to 30 days of continuous use on a single charge.
The Prototype Device Holds Great Potential
Researchers noted that previous smart rings, with batteries of only 50–60 mWh capacity, could not power the communication needed for a long duration. They stated that the picoRing solves this problem with hundreds of times lower power consumption (approximately 30–500 microwatts).
To reduce the communication load on the ring, the team designed a watch-like wristband. This wristband acts as a signal relay between the ring and the connected device, allowing the ring to use much weaker but energy-efficient communication components.
To achieve this energy efficiency, the researchers developed a new communication system called semi-passive inductive telemetry (semi-PIT). This system consists of wire coils supported by capacitors and naturally amplifies magnetic fields to increase the communication distance without using an active amplifier. In principle, this is similar to NFC. The resulting 5-gram picoRing can transmit data with minimum energy.
Although the picoRing is still in the prototype phase, the technology is noted to have the potential to not only control AR glasses but also form the foundation for long-lasting wearable devices and health sensors. However, it is stated that the device is still relatively large, experiences interference in noisy wireless environments, and currently only supports simple interactions (scrolling, clicking, etc.).
The research team plans to increase the comfort and reliability of picoRing in the future, as well as replace the wristband with conductive fabrics or alternative wireless relays. It is also mentioned that the ring could be adapted for health applications that measure biometric data such as heart rate or stress levels.
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