Communication system, information recording medium, and relay communication device

Patent metadata

Field	Value
Publication number	US-9219529-B2
Application number	US-201514610298-A
Country	US
Kind code	B2
Filing date	Jan 30, 2015
Priority date	Jun 7, 2010
Publication date	Dec 22, 2015
Grant date	Dec 22, 2015

Abstract

The disclosed communication system, information recording medium, and relay communication device allow communication via electromagnetic induction, allow the use of low-cost information recording media, improve communication stability when information recording media is misaligned or rotated, and provide high IC-chip tolerance to flexion in information recording media. An information recording medium ( 3 - 1 ) has: an IC chip ( 32 - 1 ) that is capable of communication via electromagnetic induction; and a pair of thin conductive sheets ( 21 - 1 ) connected to the IC chip ( 32 - 1 ). A relay medium ( 2 - 1 ) has thin conductive sheets ( 31 - 1 ) and a loop antenna ( 22 - 1 ), with one of said thin conductive sheets ( 31 - 1 ) connected to one end of the loop antenna ( 22 - 1 ) and the other thin conductive sheet ( 31 - 1 ) connected to the other end of the loop antenna ( 22 - 1 ). A read/write device ( 1 - 1 ) has a loop antenna ( 12 - 1 ).

First claim

The invention claimed is:

1. A communication system comprising:
an information recording medium;
an electromagnetic induction communication device; and
a relay communication device interposed between the information recording medium and the electromagnetic induction communication device; the system performing communication between the information recording medium and the electromagnetic induction communication device,
wherein the relay communication device comprises:
a relay loop antenna; and
a pair of electrically conductive relay members connected to both ends of the relay loop antenna and disposed across a slit,
wherein the electromagnetic induction communication device comprises:
a communication loop antenna configured to communicate with the relay loop antenna through electromagnetic induction or electromagnetic coupling; and
a control unit configured to perform communication processing with the information recording medium via the relay communication device,
wherein the information recording medium comprises:
an IC chip configured for communication through electromagnetic induction or electromagnetic coupling; and
a pair of electrically conductive plates disposed across and connected to the IC chip and electrostatically coupled to the pair of electrically conductive relay members of the relay communication device, and
wherein each of the pair of electrically conductive plates has one width on a side closer to the IC chip configured to be narrower than another width on an opposite side, when a top surface of the information recording medium is viewed from a normal direction, and is configured to permit at least one of displacement and rotation relative to the pair of electrically conductive relay members.

2. An information recording medium used in a communication system that includes: an electromagnetic induction communication device having a communication loop antenna configured to communicate through electromagnetic induction or electromagnetic coupling, and a control unit configured to perform communication processing via the communication loop antenna; a relay communication device having a relay loop antenna configured to communicate with the communication loop antenna through electromagnetic induction or electromagnetic coupling, and a pair of electrically conductive relay members connected to both ends of the relay loop antenna and disposed across a slit; and the information recording medium that performs communication processing with the control unit of the electromagnetic induction communication device via the relay communication device, comprising:
an IC chip configured for communication through electromagnetic induction or electromagnetic coupling; and
a pair of electrically conductive plates disposed across and connected to the IC chip, and electrostatically coupled to the pair of electrically conductive relay members of the relay communication device,
wherein each of the pair of electrically conductive plates has one width on a side closer to the IC chip configured to be narrower than another width on an opposite side, when a top surface of the information recording medium is viewed from a normal direction, and is configured to permit at least one of displacement and rotation relative to the pair of electrically conductive relay members.

3. The information recording medium according to claim 2 ,
wherein a shape of each of the pair of electrically conductive plates on the side closer to the IC chip is rectangular having a constant width.

4. The information recording medium according to claim 2 ,
wherein a shape of each of the pair of electrically conductive plates is substantially of a triangle, a width of which becomes narrower as the width approaches the side closer to the IC chip from the opposite side.

5. The information recording medium according to claim 4 ,
wherein the width narrows linearly at a constant ratio when the width approaches the side closer to the IC chip from the opposite side.

6. The information recording medium according to claim 5 ,
wherein an angle of the triangle on the side closer to the IC chip is no more than 30 degrees.

7. The information recording medium according to claim 4 ,
wherein the shape of each of the pair of electrically conductive plates is curved so that a proportion by which the width of each of the pair of electrically conductive plates narrows becomes smaller as the width approaches the side closer to the IC chip from the opposite side.

8. The information recording medium according to claim 2 ,
wherein the pair of electrically conductive plates is disposed to be point symmetrical.

9. A communication system comprising:
an information recording medium;
an electromagnetic induction communication device; and
a relay communication device interposed between the information recording medium and the electromagnetic induction communication device; the system performing communication between the information recording medium and the electromagnetic induction communication device,
wherein the relay communication device comprises:
a relay loop antenna; and
a pair of electrically conductive relay members connected to both ends of the relay loop antenna and disposed across a slit,
wherein the electromagnetic induction communication device comprises:
a communication loop antenna configured to communicate with the relay loop antenna through electromagnetic induction or electromagnetic coupling; and
a control unit configured to perform communication processing with the information recording medium via the relay communication device,
wherein the information recording medium comprises:
an IC chip configured for communication through electromagnetic induction or electromagnetic coupling; and
a pair of electrically conductive plates disposed across and connected to the IC chip and electrostatically coupled to the pair of electrically conductive relay members of the relay communication device, and
wherein each of the pair of electrically conductive relay members has one width on a side closer to the slit configured to be narrower than another width on an opposite side, when a top surface of the electromagnetic induction communication device is viewed from a normal direction, and is configured to permit at least one of displacement and rotation relative to the pair of electrically conductive plates.

10. A communication system comprising:
an information recording medium;
an electromagnetic induction communication device; and
a relay communication medium interposed between the information recording medium and the electromagnetic induction communication device, the system performing communication between the information recording medium and the electromagnetic induction communication device,
wherein the relay communication medium comprises:
a relay loop antenna; and
at least one electrically conductive relay member connected to at least one end of the relay loop antenna,
wherein the electromagnetic induction communication device comprises:
a communication loop antenna configured to communicate with the relay loop antenna through electromagnetic induction; and
a control unit configured to perform communication processing with the information recording medium via the relay communication medium,
wherein the information recording medium comprises:
an IC chip configured for communication through electromagnetic induction or electromagnetic coupling; and
a pair of electrically conductive plates disposed across a slit and connected to the IC chip, one of the pair of electrically conductive plates being electrostatically coupled to the electrically conductive relay member connected to one end of the relay loop antenna and the o

Assignees

• Dainippon Printing Co Ltd

Inventors

• Akiyama Tomoya
• Ohsugi Kei

Classifications

• G06K19/07749 Primary

  the record carrier being capable of non-contact communication, e.g. constructional details of the antenna of a non-contact smart card · CPC title

• G06K19/07756

  the connection being non-galvanic, e.g. capacitive · CPC title

• H04B5/0093 Primary

  Electricity · mapped topic

• H04B5/02

  Electricity · mapped topic

• H04B5/0081

  Electricity · mapped topic