- Joong Hoon Lee, Hanseop Kim, Ji-Young Hwang, Jinmook Chung, Tae-Min Jang, Dong Gyu Seo, Yuyan Gao, Junhyun Lee, Haedong Park, Seungwoo Lee, Hong Chul Moon, Huanyu Cheng, Sang-Hoon Lee, Suk-Won Hwang. 3D Printed, Customizable, and Multifunctional Smart Electronic Eyeglasses for Wearable Healthcare Systems and Human–Machine Interfaces. ACS Applied Materials & Interfaces, 2020; 12 (19): 21424 DOI: 10.1021/acsami.0c03110
Devices that measure electrical signals from the brain (electroencephalogram; EEG) or eyes (electrooculogram; EOG) can help diagnose conditions like epilepsy and sleep disorders, as well as control computers in human-machine interfaces. But obtaining these measurements requires a steady physical contact between skin and sensor, which is difficult with rigid devices. Suk-Won Hwang and colleagues wanted to integrate soft, conductive electrodes into e-glasses that could wirelessly monitor EEG and EOG signals, ultraviolet (UV) intensity, and body movements or postures, while also acting as a human-machine interface.
The researchers built the glasses’ frame with a 3D printer and then added flexible electrodes near the ears (EEG sensor) and eyes (EOG sensor). They also added a wireless circuit for motion/UV sensing on the side of the glasses and a UV-responsive, color-adjustable gel inside the lenses. When the sensor detected UV rays of a certain intensity, the lenses changed color and became sunglasses. The motion detector allowed the researchers to track the posture and gait of the wearer, as well as detect when they fell. The EEG recorded alpha rhythms of the brain, which could be used to monitor health. Finally, the EOG monitor allowed the wearer to easily move bricks around in a popular video game by adjusting the direction and angle of their eyes. The e-glasses could be useful for digital healthcare or virtual reality applications, the researchers say.
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Multifunctional e-glasses monitor well being, protect eyes, control video games