RFID COMMUNICATION DEVICE

• US 20100207735A1
• Filed: 02/17/2010
• Published: 08/19/2010
• Est. Priority Date: 02/18/2009
• Status: Active Grant

• Current Assignee: Samsung SDI Company Limited
• Original Assignee: Samsung SDI Company Limited
• Inventors: KIM, Bongyoung
• Granted Patent: US 8,368,515 B2
• Time in Patent Office: Days
• US Class Current: 340/10.100
• CPC Class Codes: G06K 19/07749 the record carrier being capable of non-contact communication, e.g. constructional details of the antenna of a non-contact smart card
• CPC Class Codes: G06K 7/10237 the reader and the record carrier being capable of selectively switching between reader and record carrier appearance, e.g. in near field communication [NFC] devices where the NFC device may function as an RFID reader or as an RFID tag

Abstract

An RFID device, and more particularly to a RFID device which can be used in both a tag mode and a reader mode. There is provided an RF antenna transmitting and receiving wireless signals; a tuning circuit as a frequency filtering circuit connected to the RF antenna; a memory storing data; and a wireless communication card including antenna connection terminals connected to the RF antenna.

Claims

1. A radio frequency identification (RFID) communication device comprising a wireless communication card including:

a radio frequency (RF) antenna transmitting and receiving wireless signals;

a tuning circuit as a frequency filtering circuit connected to the RF antenna;

a memory storing data; and

antenna connection terminals connected to the RF antenna.

2. The RFID communication device of claim 1, wherein the wireless communication card further includes a rechargeable secondary battery.

3. The RFID communication device of claim 2, wherein the secondary battery comprises a bare cell, two charge/discharge terminals connected to the bare cell, and a protection circuit controlling charge and discharge of the bare cell.

4. The RFID communication device of claim 3, wherein the number of antenna connection terminals is three and one of the antenna connection terminals is shared with the one of the charge/discharge terminals.

5. The RFID communication device of claim 1, wherein the tuning circuit is a 13.56 MHz frequency filtering circuit.

6. The RFID communication device of claim 1, further comprising a wireless communication controller set including a communication controller chip supporting both an RFID tag mode and reader mode and connected to the wireless communication card.

7. The RFID communication device of claim 6, wherein the communication controller chip is a near field communication (NFC) chip.

8. The RFID communication device of claim 6, wherein the wireless communication controller set further includes a matching circuit that is a frequency filtering circuit connecting the antenna connection terminals of the wireless communication card and the communication controller chip.

9. The RFID communication device of claim 6, wherein the wireless communication controller set further includes an output unit outputting data stored in the memory of the wireless communication card.

10. The RFID communication device of claim 6, wherein the wireless communication controller set further includes a power source therein.

11. The RFID communication device of claim 6, wherein the wireless communication card further includes a controller unit controlling the memory.

12. A radio frequency identification (RFID) device comprising a wireless communication card for use with a wireless communication controller set, the RFID device comprising:

a matching circuit filtering a frequency;

a communication controller chip controlling the communication card in passive mode and the wireless communication controller set in active mode; and

a microcontroller unit controlling the communication controller chip,

wherein the matching circuit is a frequency filtering circuit connecting first through third terminals of an antenna of the wireless communication card; and

wherein one of the first through third terminals of the antenna connects to a bare cell of the wireless communication card.

13. The RFID device of claim 12, further comprising:

an output unit outputting data stored on a memory to a user; and

a power source powering the communication control chip, the microcontroller unit and the output unit.

14. The RFID device of claim 12, wherein the communication controller chip is a near field communication (NFC) chip.

15. The RFID device of claim 13, wherein the output unit is a display device or speaker provided in a terminal that is the wireless communication controller set.

16. A radio frequency identification (RFID) a wireless communication card and a wireless communication set, the RFID device comprising:

the wireless communication card comprising;

a radio frequency (RF) antenna transmitting and receiving wireless signals;

a tuning circuit as a frequency filtering circuit connected to the RF antenna;

a memory storing data;

first through third antenna connection terminals connected to the RF antenna; and

a rechargeable battery; and

the wireless communication set comprising;

a matching circuit filtering a frequency;

a communication controller chip controlling the wireless communication card in passive mode and the wireless communication controller set in active mode; and

a microcontroller unit controlling the communication controller chip,

wherein the matching circuit is a frequency filtering circuit connecting to the first through third terminals of the antenna of the wireless communication card; and

wherein one of the first through third terminals of the antenna connects to the rechargeable battery of the wireless communication card.

17. The RFID device of claim 16, wherein the rechargeable battery comprises a bare cell, two charge/discharge terminals connected to the bare cell, and a protection circuit controlling charge and discharge of the bare cell.

18. The RFID device of claim 17, wherein the number of antenna connection terminals is three and one of the antenna connection terminals is shared with the one of the charge/discharge terminals.

19. The RFID device of claim 18, wherein the wireless communication set receives power from the rechargeable batter of the wireless communication card through the two charge/discharge terminals.

20. The RFID device of claim 16, wherein the tuning circuit and the matching circuit are a 13.56 MHz frequency filtering circuit.

21. The RFID device of claim 16, wherein the memory is a data storage device that transmits and receives data through the first through third antenna terminals.

22. The RFID device of claim 16, further comprising a protection circuit comprising:

a switching device switching a charge/discharge current path of the wireless communication card according to a charge/discharge control signal; and

a charge/discharge controller chip controlling the switching device by generating the charge/discharge control signal.