Patent ID: 9133647
Filing Date: 2015-09-15
Classification: E05B,G07C,Y10T

Abstract:
1. Electronic circuitry for an electronic lock cylinder, comprising: a first antenna configured to receive a first near field communication (NFC) signal; a NFC processor, coupled to the first antenna, configured to decrypt the first NFC signal to ascertain a command to lock or unlock the electronic lock cylinder and to authenticate a source of the first NFC signal; a second antenna configured to receive a second NFC signal that has the same frequency as the first NFC signal, wherein the second antenna and the first antenna are adapted to avoid interference and coupling; and an energy storage capacitor configured to store electrical energy harvested from the second NFC signal through the second antenna; a motor switch configured to drive a motor clockwise or counterclockwise by discharging the energy storage capacitor depending on a control signal; and a controller, coupled to the energy storage capacitor and the motor switch, configured to monitor whether the energy storage capacitor has reached an upper threshold charge and to output the control signal that corresponds to the command to lock or unlock the electronic lock cylinder when the energy storage capacitor has reached the upper threshold charge.