A Fully Integrated RF-Powered Contact Lens With a Single Element Display

摘要

We present progress toward a wirelessly-powered active contact lens comprised of a transparent polymer substrate, loop antenna, power harvesting IC, and micro-LED. The fully integrated radio power harvesting and power management system was fabricated in a $0.13~mu{rm m}$ CMOS process with a total die area of $0.2~{rm mm}^{2}$. It utilizes a small on-chip capacitor for energy storage to light up a micro-LED pixel. We have demonstrated wireless power transfer at 10 cm distance using the custom IC and on-lens antenna.