Patent ID: 11916618
Assignee: BOE TECHNOLOGY GROUP CO., LTD.
Field: Telecommunications (Electrical engineering)
Classification: CPC H  Y | IPC H

Claim 0:
1. A Near Field Communication (NFC) tag, comprising: a NFC coil, a control circuit, an energy acquisition circuit, an energy storage circuit, and an electronic ink display screen wherein
the NFC coil is configured to detect a magnetic field signal transmitted by a card reader when a distance between the NFC tag and the card reader is within a predetermined distance range;
the energy acquisition circuit is configured to convert the magnetic field signal into an electrical signal when the NFC coil detects the magnetic field signal; and
the control circuit is configured to control the energy acquisition circuit to transmit the electrical signal to the energy storage circuit, and control to charge the energy storage circuit through the electrical signal;
the electronic ink display screen is connected to the control circuit, the control circuit is configured to control the NFC tag to perform data transmission with the card reader upon detecting that a voltage of the energy storage circuit has reached a rated voltage, and refresh display content of the electronic ink display screen after the data transmission has been performed.