Electronic label

• US 20030117336A1
• Filed: 10/03/2002
• Published: 06/26/2003
• Est. Priority Date: 04/18/2000
• Status: Active Grant

• Current Assignee: Nagravision SA (Kudelski SA)
• Original Assignee: Nagra ID SA (Kudelski SA)
• Inventors: Droz, Francois
• Granted Patent: US 7,012,530 B2
• Time in Patent Office: Days
• US Class Current: 343/866
• 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 19/07771 the record carrier comprising means for minimising adverse effects on the data communication capability of the record carrier, e.g. minimising Eddy currents induced in a proximate metal or otherwise electromagnetically interfering object

Abstract

One characteristic of electronic labels is that they can be read and written on without electrical contact through the communication coil (1). The reading head is then positioned at some distance and communicates with the label through electromagnetic waves.

When these labels are placed on metallic objects, reading becomes difficult even impossible because of the dispersion of the waves in the object.

To overcome this drawback, the invention proposes the adding of an electromagnetic conductive element (3, 3′) to the coil (1) in order to insulate it (1) and enhance the reception quality.

Claims

1. Electronic label comprising at least one electronic element (2) and a coil (1), characterized in that the coil (1) includes at least one magneto reflective element constituted by an electromagnetic conductive element (3, 3′

) independent of the set formed by the electronic component (2) and the coil (1).

2. Electronic label according to claim 1, characterized in that the magneto reflective element (3, 3′

) covers all or part of the surface of the coil (1).

3. Electronic label according to claim 1, characterized in that the magneto reflective element (3, 3′

) is slightly larger than the surface of the coil (1).

4. Electronic label according to claims 1 to 3, characterized in that the magneto reflective element (3, 3′

) comprises three-dimensional shapes.

5. Electronic label according to claims 1 to 4, characterized in that the magneto reflective element (3, 3′

) comprises one or several openings on its surface.

6. Electronic label according to claim 1, characterized in that a first magneto reflective element (3, 3′

) is situated on all or part of the periphery of the coil (1).

7. Electronic label according to claim 6, characterized in that the magneto reflective element (3, 3′

) comprises a second part which covers all or part of the surface of the coil (1).

8. Electronic label according to claim 7, characterized in that the second part of the magneto reflective element (3, 3′

) is slightly larger than the surface of the coil (1).

9. Electronic label according to claims 7 and 8, characterized in that the second part of the magneto reflective element (3, 3′

) comprises three-dimensional shapes.

10. Electronic label according to claims 7 to 9, characterized in that the second part of the magneto reflective element (3, 3′

) comprises one or several openings on its surface.

11. Electronic label according to claims 7 to 10, characterized in that the first and second parts of the magneto reflective element (3, 3′

) are made in a single piece.