Title :
Toward an active contact lens: Integration of a wireless power harvesting IC
Author :
Pandey, Jagdish ; Liao, Yu-Te ; Lingley, Andrew ; Parviz, Babak ; Otis, Brian
Author_Institution :
Dept. of Electr. Eng., Univ. of Washington, Seattle, WA, USA
Abstract :
The overarching goal of an active contact lens is to integrate sensing or display functionality onto a wearable device, enabling on-lens medical monitoring and heads-up displays. We present progress toward a wirelessly-powered active contact lens comprising a transparent polymer substrate, loop antenna, power harvesting IC, and a custom micro-LED. The fully integrated radio power harvesting and a power management system was fabricated in a 0.13 ¿m CMOS process and utilizes a small on-chip capacitor as an energy storage element to light up a microLED pixel. We have demonstrated wireless power transfer and LED intensity control using the custom IC and on-lens antenna.
Keywords :
CMOS integrated circuits; biomedical electronics; contact lenses; energy harvesting; light emitting diodes; low-power electronics; CMOS process; LED intensity control; active contact lens; energy storage element; fully integrated radio power harvesting; heads-up displays; loop antenna; microLED; on-chip capacitor; on-lens medical monitoring; power management system; transparent polymer substrate; wearable device; wireless power harvesting IC; wireless power transfer; Biomedical monitoring; CMOS process; Energy management; Lenses; Polymers; Power system management; Radio spectrum management; System-on-a-chip; Two dimensional displays; Wireless sensor networks;
Conference_Titel :
Biomedical Circuits and Systems Conference, 2009. BioCAS 2009. IEEE
Conference_Location :
Beijing
Print_ISBN :
978-1-4244-4917-0
Electronic_ISBN :
978-1-4244-4918-7
DOI :
10.1109/BIOCAS.2009.5372069
