Electronic medium with IC and system of the same

• US 9,692,237 B2
• Filed: 06/28/2012
• Issued: 06/27/2017
• Est. Priority Date: 06/28/2012
• Status: Active Grant

• Current Assignee: Murata Manufacturing Co Limited
• Original Assignee: Murata Manufacturing Co Limited
• Inventors: Murase, Motonori
• Primary Examiner(s): Fureman, Jared
• Assistant Examiner(s): Dominique, Emmanuel R
• Application Number:
  US13/535,389
• Publication Number:
  US 20140001851A1
• Time in Patent Office: 1,825 Days
• Field of Search: 307104
• CPC Class Codes: H02J 50/12 of the resonant type
• CPC Class Codes: H04B 5/77 for interrogation
• CPC Class Codes: H04B 5/79 for data transfer in combination with power transfer

Abstract

An electronic medium with an integrated circuit includes a power feeding terminal pair including a first power feeding terminal and a second power feeding terminal, an integrated circuit including at least one first rectifying circuit, and a second rectifying circuit that is separate from the integrated circuit, wherein the first rectifying circuit and the second rectifying circuit are connected in series between the first power feeding terminal and the second power feeding terminal.

Claims

1. An electronic medium with an integrated circuit comprising:

a power feeding terminal pair including a first power feeding terminal and a second power feeding terminal;

an integrated circuit including at least one first rectifying circuit;

a second rectifying circuit that is separate from the integrated circuit;

a charging device connected to an output terminal of the second rectifying circuit;

a supply power control unit arranged and programmed to control an amount of power to be supplied to at least the second rectifying circuit; and

a bypass circuit connected to the first rectifying circuit in parallel;

wherein

the supply power control unit includes;

a charge control switching element connected to the first rectifying circuit and the second rectifying circuit in series; and

a charge control unit arranged and programmed to detect a charge state of the charging device to control closing and opening of the charge control switching element;

the first rectifying circuit and the second rectifying circuit are connected in series between the first power feeding terminal and the second power feeding terminal; and

the electronic medium receives a supply of power in a non-contact manner.

2. The electronic medium with the integrated circuit according to claim 1, further comprising an antenna coil, both ends of which are connected to the power feeding terminal pair.

3. The electronic medium with the integrated circuit according to claim 1, wherein the integrated circuit is a radio frequency identification chip.

4. The electronic medium with the integrated circuit according to claim 1, further comprising a current distribution ratio control unit arranged and programmed to control a current distribution ratio with respect to the first rectifying circuit and the second rectifying circuit.

5. The electronic medium with the integrated circuit according to claim 4, wherein the current distribution ratio control unit includes:

a first switch connected to the first rectifying circuit in parallel;

a second switch connected to the second rectifying circuit in parallel; and

a switch control unit arranged and programmed to perform control such that one of the first switch and the second switch is opened and the other of the first switch and the second switch is short-circuited.

6. The electronic medium with the integrated circuit according to claim 5, wherein

the switch control unit is included in the integrated circuit;

the switch control unit outputs a control voltage signal at Low level or High level;

the first switch is opened with the control voltage signal at Low level and is short-circuited with the control voltage signal at High level; and

the second switch is short-circuited with the control voltage signal at Low level and is opened with the control voltage signal at High level.

7. The electronic medium with the integrated circuit according to claim 5, wherein the first switch is connected to the bypass circuit in series.

8. The electronic medium with the integrated circuit according to claim 1, wherein

the supply power control unit outputs a supply control voltage signal at Low level or High level;

and

the charge control switching element is short-circuited with the supply control voltage signal at Low level and is opened with the supply control voltage signal at High level.

9. The electronic medium with the integrated circuit according to claim 1, wherein the supply power control unit includes:

another charge control switching element connected to the second rectifying circuit in parallel; and

the charge control unit is arranged and programmed to detect a charge state of the charging device to control closing and opening of the another charge control switching element.

10. The electronic medium with the integrated circuit according to claim 1, wherein

the integrated circuit includes a memory;

and

the electronic medium with the integrated circuit includes a charge state detecting unit arranged and programmed to detect a charge state of the charging device to write information of the charge state into the memory.

11. The electronic medium with the integrated circuit according to claim 1, wherein

the integrated circuit includes a memory and the charge control unit;

the electronic medium with the integrated circuit includes a charge state detecting unit arranged and programmed to detect a charge state of the charging device to write information of the charge state into the memory; and

the charge control unit performs switch control based on the charge state stored in the memory.

12. The electronic medium with the integrated circuit according to claim 1, wherein a functional unit arranged to electrically realize a predetermined function is connected to an output terminal of the second rectifying circuit.

13. The electronic medium with the integrated circuit according to claim 12, wherein the functional unit is a display device including a display panel that displays information and a display control unit arranged and programmed to control display of the display panel.

14. A system of an electronic medium with an integrated circuit comprising:

the electronic medium with the integrated circuit according to claim 1; and

an external power feeding device arranged to provide an AC signal through the power feeding terminal pair.

15. The system of the electronic medium with the integrated circuit according to claim 14, wherein

the electronic medium with the integrated circuit includes an antenna coil;

and

the external power feeding device is a reader/writer device including a different antenna coil that is arranged to be electromagnetically coupled to the antenna coil of the electronic medium with the integrated circuit, and a signal processing unit arranged to apply a signal having a predetermined frequency to the different antenna coil.