Paper capacitor

• US 6,603,400 B1
• Filed: 05/04/2000
• Issued: 08/05/2003
• Est. Priority Date: 05/04/2000
• Status: Expired due to Term

• Current Assignee: Symbol Technologies, LLC (Zebra Technologies Corporation)
• Original Assignee: Telxon Corporation (Zebra Technologies Corporation)
• Inventors: Shoobridge, Richard Allen
• Primary Examiner(s): PHAM, TOAN NGOC
• Application Number:
  US09/564,625
• Time in Patent Office: 1,188 Days
• Field of Search: 340/572.1, 340/572.4, 340/572.7, 340/10.1, 340/10.33, 340/10.34, 340/572.8, 320/166, 320/DIG.23, 307/109, 307/110
• US Class Current: 340/572.1
• CPC Class Codes: G06K 19/06009 with optically detectable marking G06K19/063, G06K19/08 take precedence
• CPC Class Codes: G06K 19/0701 at least one of the integrated circuit chips comprising an arrangement for power management
• CPC Class Codes: G06K 19/077 Constructional details, e.g. mounting of circuits in the carrier
• 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: G08B 13/2417 having a radio frequency identification chip
• CPC Class Codes: G08B 13/2437 Tag layered structure, processes for making layered tags
• CPC Class Codes: G08B 13/2445 Tag integrated into item to be protected, e.g. source tagging

Abstract

An RFID tag system is provided that is convertable from a passive system to an active system. This is accomplished by providing chargeable ink wells on the RFID tag system that can provide power to components in the RFID tag system. The power provides the components with power to communicate messages between the RFID tag system and a base unit. The chargeable ink wells are formed by printing a conductive ink onto the RFID tag system. The conductive ink forms a capacitive well having stored up energy upon charging of the conductive ink. The ink can be charged prior to printing on the RFID tag system or charged after the ink is printed onto the RFID tag system. The printed wells can be formed similar to large capacitive plates. The capacitive wells can also be formed from printed features such as a barcode or such as a group of alphanumeric characters.

Claims

1. An RFID tag system comprising;

an active component module;

a transceiver module coupled to the active component module; and

a chargeable ink well printed on the RFID tag system, the chargeable ink well employed as an energy source that provides power to the active component module and the transceiver module for an extended period of time.

2. The system of claim 1, wherein the chargeable ink well is formed from a first ink plate and a second ink plate.

3. The system of claim 1, wherein the chargeable ink well is charged prior to printing onto the RFID tag system.

4. The system of claim 1, wherein the chargeable ink well is charged after it is printed onto the RFID tag system and the extended period of time is about 24 hours.

5. The system of claim 1, wherein the chargeable ink well is formed from a barcode label printed on the RFID tag system.

6. The system of claim 1, wherein the chargeable ink well is formed from alphanumeric characters printed on the RFID tag system.

7. The system of claim 1, the active component module including a processor for processing and transmitting messages and a memory for storing RFID tag system identification information.

8. The system of claim 1, the transceiver module including a receiver component and a transceiver component both coupled to an antenna.

9. The system of claim 1, the RFID tag system being shaped in the form of a label having a first side and a second side, the active component module and the transceiver module being disposed on the first side and the chargeable ink well being disposed on the second side.

10. The system of claim 9, wherein the chargeable ink well is coupled to the active component module and the transceiver module by a contact extending through the first side to the second side of the RFID tag system.

11. The system of claim 1, the RFID tag system being shaped in the form of a label having a first side and a second side, the active component module and the transceiver module being disposed on the first side and the chargeable ink well being disposed on the first side.

12. The system of claim 1, further including a recharge component coupled to the chargeable ink well, the recharge component being adapted to receive a signal from a source and provided a charge to the capacitive chargeable ink well.

13. The system of claim 12, the recharge component being coupled to a coil and the source being a magnetic source wherein a magnetic field induces a current in the coil that is harnessed by the recharge component to charge the chargeable ink well.

14. The system of claim 12, the recharge component being coupled to an antenna and the source being a power transmission signal wherein the recharge component harnesses the power transmission signal to charge the chargeable ink well.

15. A method of forming an RFID tag system comprising;

providing an RFID tag having components for transmitting and receiving messages;

printing a printable feature with a chargeable ink on a single side of an RFID tag, the printable feature being employed as an energy source that provides power to the components for an extended period of time; and

providing a recharge component coupled to the printable feature for charging the chargeable ink.

16. The method of claim 15, wherein printing a printable feature includes the step of printing a first ink plate and a second ink plate.

17. The method of claim 15, wherein printing a printable feature includes the step of printing a barcode label on the RFID tag system.

18. The method of claim 15, wherein printing a printable feature includes the step of printing alphanumeric characters on the RFID tag system.

19. The method of claim 15, further including charging the chargeable ink prior to the step of printing.

20. The method of claim 15, further including charging the chargeable ink after the step of printing.

21. The method of claim 20, wherein charging the chargeable ink after the step of printing includes subjecting the RFID tag system to a magnetic field.

22. The method of claim 20, wherein charging the chargeable ink after the step of printing includes transmitting a power transmission signal to the RFID tag system.

23. An RFID tag system comprising;

means for transmitting and receiving messages;

a chargeable ink well printed on a single side of the RFID tag system, the chargeable ink well employed as an energy source that provides power for an extended period of time of about 24 hours to the means for transmitting and receiving messages; and

means for receiving and harnessing a charge signal to charge the chargeable ink well.

24. The system of claim 23, further including means for storing RFID tag system identification information.