RFID information medium and article to which the medium is attached

• US 20090302120A1
• Filed: 09/26/2007
• Published: 12/10/2009
• Est. Priority Date: 09/26/2006
• Status: Active Grant

• Current Assignee: Toppan Printing Co., Ltd. (TOPPAN Holdings, Inc.)
• Original Assignee: Toppan Printing Co., Ltd. (TOPPAN Holdings, Inc.)
• Inventors: Omura, Kunio, Sakai, Yuji, Nakajima, Hidemi
• Granted Patent: US 9,251,456 B2
• Time in Patent Office: Days
• US Class Current: 235/492
• CPC Class Codes: G03H 1/0011 for security or authentication holograms on information-bearing cards B42D25/328; testing papers with holograms G07D7/0032
• CPC Class Codes: G03H 1/02 Details of features involved during the holographic process; Replication of holograms without interference recording
• CPC Class Codes: G03H 1/0244 Surface relief holograms replicating hologram without interference recording G03H1/0276
• CPC Class Codes: G03H 1/0256 having specific functional layer
• CPC Class Codes: G03H 2250/36 Conform enhancement layer
• CPC Class Codes: G06K 19/06009 with optically detectable marking G06K19/063, G06K19/08 take precedence
• CPC Class Codes: G06K 19/0723 the record carrier comprising an arrangement for non-contact communication, e.g. wireless communication circuits on transponder cards, non-contact smart cards or RFIDs
• CPC Class Codes: G06K 19/08 using markings of different kinds or more than one marking of the same kind in the same record carrier, e.g. one marking being sensed by optical and the other by magnetic means
• CPC Class Codes: G06K 19/16 the marking being a hologram or diffraction grating
• CPC Class Codes: G06K 19/18 Constructional details

Abstract

An RFID information medium transmits and receives data to and from an external reader in a noncontact manner. The RFID information medium is provided with a main body section having an insulating member, either an antenna or an antenna member arranged on the main body section, and a conductor arranged on the main body section. The conductor has a conductive material layer. The conductive material layer partially overlaps the antenna or the antenna member in the thickness direction of the main body section.

Claims

1. An RFID information medium for transmitting and receiving data to and from an external reader in a noncontact manner, comprising:

a main body section having an insulating member;

an antenna arranged on the main body section; and

a conductor arranged on the main body section,

wherein the conductor has a conductive material layer and the conductive material layer partially overlaps the antenna in a thickness direction of the main body section.

2. The RFID information medium of claim 1, wherein the conductor and the antenna are electrically contacted in the thickness direction by capacitive coupling.

7. The RFID information medium of claim 1 or 3, further comprising an optical variable device in which a color or image changes according to a point of view.

8. The RFID information medium of claim 7, wherein the optical variable device comprises a conductive reflective layer or a conductive transparent layer, wherein the reflective layer or the transparent layer of the optical variable device is used as the conductive material layer in a combined use.

9. The RFID information medium of claim 1 or 3, wherein a communication scheme in transmission and reception of the data is a radio wave scheme.

10. An article to which the RFID information medium of claim 1 or 3 is attached.

11. The article of claim 10, wherein the RFID information medium is directly attached to the article.

12. The article of claim 10, wherein the RFID information medium is attached to a package for packaging the article.

3. An RFID information medium for transmitting and receiving data to and from an external reader in a noncontact manner, comprising:

a main body section having an insulating member;

an antenna member arranged on the main body section; and

a conductor arranged on the main body section,

wherein the conductor has a conductive material layer and the conductive material layer partially overlaps the antenna member in a thickness direction of the main body section.

4. The RFID information medium of claim 3, wherein the conductor and the antenna member are electrically contacted in the thickness direction by capacitive coupling.

5. The RFID information medium of claim 3 or 4, wherein the antenna member has an antenna function generated by cooperating with the conductor without an independent antenna function.

6. The RFID information medium of claim 3 or 4, wherein the antenna member is formed for a dipole antenna in a long shape, a length of the antenna member is set to be shorter than a length in which communication is possible with respect to a wavelength of a carrier for performing data communication, and a total length in which the overlapped antenna member and conductor are combined is set to a length in which communication is possible.