Patent ID: 11900192
Assignee: VISA U.S.A. INC.
Field: Computer technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 0:
1. A method for powering a token, wherein the token includes a power circuit that powers components of the token, an energy storage device coupled to the power circuit, and one or more stationary piezoelectric crystals, the method comprising:
generating, by the token, electrical current from a moving pendulum mass striking the one or more stationary piezoelectric crystals of the token;
charging, by the token, the energy storage device with the generated electrical current;
selecting, by the token, the energy storage device as an energy source for the token;
energizing, by the token, the power circuit with energy stored in the energy storage device;
sensing, by the token, electromagnetic radiation from an external source;
in response to sensing the electromagnetic radiation from the external source, selecting, by the token, the electromagnetic radiation as the energy source for the token;
energizing, by the token, the power circuit with the electromagnetic radiation from the external source;
sensing, by the token, a decline in the electromagnetic radiation from the external source;
in response to sensing the decline in the electromagnetic radiation from the external source, selecting, by the token, the energy storage device as the energy source for the token; and
energizing, by the token, the power circuit with the energy stored in the energy storage device instead of the electromagnetic radiation.