"A research group focused on the development of artificial retina prototyped a system that can wirelessly supply power from an external source to an LSI in an artificial retina implanted in the eyeball.
The research group led by Mitsumasa Koyanagi, professor at graduate school of engineering, Tohoku University, presented the accomplishment at 2007 International Conference on Solid State Devices and Materials (SSDM), an international conference on semiconductors that was held from Sept. 18 to 21, 2007.
The latest system employs an electromagnetic induction type wireless power supply unit. The unit is equipped with a compact battery. It supplies power from the primary coil embedded in a lens of eyeglasses to the secondary coil in a crystalline lens serving as the lens for the eye by means of electromagnetic induction. Two major parts of the latest development were the secondary coil and the Schottky diode provided to rectify AC current supplied to the secondary coil to DC current."
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