This disclosure describes an inductive wireless charging system for smart glasses that places a charging coil on smart glasses and utilizes the carrying case of the smart glasses for wireless charging. Per techniques of this disclosure, the carrying case includes ferrite sheets provided on its walls. A receiver winding is provided along the rim of the smart glasses. The winding can include Litz wires or flexible printed circuits (FPC) embedded into the rim. Ferrite sheets of the carrying case are utilized as both RX and TX ferrite sheets. A larger ferrite sheet additionally provides better magnetic performance and enables greater power transmission capacity.
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Xu, Kai; Stephanou, John; and Orr, Kevin, "Smart Glasses With Wireless Charging", Technical Disclosure Commons, (March 22, 2021)