Contact-free display peripheral device for contact-free portable object

• US 20020105065A1
• Filed: 02/25/2002
• Published: 08/08/2002
• Est. Priority Date: 06/29/2000
• Status: Active Grant

• Current Assignee: Ask S.A. (Paragon Group Limited)
• Original Assignee: Ask S.A. (Paragon Group Limited)
• Inventors: Parrault, Olivier
• Granted Patent: US 6,799,721 B2
• Time in Patent Office: Days
• US Class Current: 257/679
• CPC Class Codes: G06K 19/07703 the interface being visual
• 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 7/10178 including auxiliary means for focusing, repeating or boosting the electromagnetic interrogation field comparable booster antennas integrated on the record carrier itself G06K19/07794
• CPC Class Codes: G06Q 20/201 Price look-up processing, e.g. updating

Abstract

The present invention concerns a peripheral display device for a portable contactless object such as a smart card (10) enabling information associated with the use of this portable object to be displayed. This peripheral device includes at least one chip, a display means (16) and a means for receiving energy and information (18), not connected by an ohmic contact to the portable object. This receiving means is a flat coil which plays the role of the secondary of a transformer, the primary of which is formed by the antenna (14) of the portable object, when the latter receives energy and information from a portable object reader via electromagnetic coupling.

Claims

1. A peripheral display device for contactless portable objects such as a smart card 10 enabling information associated with the use of said portable object to be displayed, characterized in that it includes at least one chip, a display means 16 and a means 18 for receiving energy and said information not connected by ohmic contact to said portable object, said receiving means being a flat coil which plays the role of the secondary of a transformer, the primary of which consists of the antenna 14 of said portable object, when the latter receives energy and information from a reader of said portable object by electromagnetic coupling.

2. The peripheral display device according to claim 1, in which said flat coil receives said energy and said information when said portable object is coupled with a reader of said portable object.

3. The peripheral display device according to claim 2, in which the energy and said information transmitted by the antenna of said portable object are generated by said portable object reader.

4. The peripheral display device according to claim 2, in which said information transmitted by the antenna of said portable object are generated by the chip of said portable object.

5. The peripheral display device according to anyone of the previous claims, in which said display means features persistent display, such that the information remains displayed on said display means for a time period greater than the average period between two transactions.

6. The peripheral display device according to claim 5, in which the long-persistence display means is a bistable liquid crystal screen.

7. The peripheral display device according to anyone of the previous claims, characterized in that it includes at least one energy storage means.

8. The peripheral display device according to claim 7 in which said energy storage means is a capacitor.

9. The peripheral display device according to claim 7 or 8, in which the display means is provided with a long-persistence screen feature owing to the energy stored in said energy storage means.

10. The peripheral display device according to any one of the previous claims, characterized in that it is integrated into said portable object, said flat coil being in the same plate as said antenna of said portable object.

11. The peripheral display device according to any one of claims 1 to 9, characterized in that it can be separated from said portable object.

12. The peripheral display device according to anyone of the previous claims, characterized in that it can send a response to said portable object reader by retromodulation, via said flat coil, coupled to the antenna of said portable object.