Method and an assembly for generating a magnetic field and a method of manufacturing an assembly

• US 10,614,351 B2
• Filed: 08/22/2018
• Issued: 04/07/2020
• Est. Priority Date: 12/19/2014
• Status: Active Grant

• Current Assignee: CardLab ApS
• Original Assignee: CardLab ApS
• Inventors: Nielsen, Finn
• Primary Examiner(s): Lee, Seung H
• Application Number:
  US16/109,056
• Publication Number:
  US 20190057291A1
• Time in Patent Office: 594 Days
• CPC Class Codes: G06K 19/06206 the magnetic marking being emulated
• CPC Class Codes: G06K 7/08 by means detecting the change of an electrostatic or magnetic field, e.g. by detecting change of capacitance between electrodes
• CPC Class Codes: G06Q 20/341 Active cards, i.e. cards including their own processing means, e.g. including an IC or chip
• CPC Class Codes: G06Q 20/342 Cards defining paid or billed services or quantities
• CPC Class Codes: G06Q 20/363 with the personal data of a user
• CPC Class Codes: G06Q 20/367 involving electronic purses or money safes
• CPC Class Codes: G06Q 20/40975 using encryption therefor
• CPC Class Codes: G07F 7/025 by means, e.g. cards, providing billing information at the time of purchase, e.g. identification of seller or purchaser, quantity of goods delivered or to be delivered
• CPC Class Codes: G07F 7/0866 by active credit-cards adapted therefor G07F7/1008 takes precedence
• CPC Class Codes: G07F 7/1008 Active credit-cards provided with means to personalise their use, e.g. with PIN-introduction/comparison system

Abstract

A credit card shaped element with a dynamic stripe which may be activated or deactivated, where the stripe is formed by a plurality of coils provided along the curve thereof, where the plurality of coils are activated in a sequential manner, where a plurality of proximity sensing coils are provided in series along the curve thereof, where the plurality of coils are formed by one coil contacted at multiple positions along its length by contact pads and where the signals fed to the coils cause an output of a reader coil to output a signals with a minimum slope or where one signal fed to one track has no peaks when the other signal is close to zero.

Claims

1. A method of generating a particular magnetic signal using one or more transmitting coils, the method comprising:

outputting a magnetic signal which, over time, has a sequence of opposite peaks, wherein the magnetic signal has, apart from magnetic signal portions on either side of each of the opposite peaks and within 10% of a time duration between two opposite, neighbouring peaks of the sequence of opposite peaks, a predetermined minimum slope of 10% multiplied by a magnetic signal value difference between peak values of the two, opposite neighbouring peaks divided by a time elapsed between outputting the two, opposite neighbouring peaks.

2. The method according to claim 1, wherein the magnetic signal, for at least a predetermined period of time after outputting of each peak of the sequence of opposite peaks, has a predetermined slope.

3. The method according to claim 1, wherein the magnetic signal represents a binary signal having a first binary value and a second binary value, where the first binary value is represented by two opposite, neighbouring peaks of the sequence of opposite peaks and where the second binary value is represented by a single peak of the sequence of opposite peaks.

4. The method according to claim 1, wherein the outputting the magnetic signal includes feeding a signal to the one or more transmitting coils.

5. The method according to claim 1, wherein the magnetic signal has, apart from the magnetic signal portions on either side of each of the opposite peaks and within 1% of the time duration between the two opposite, neighbouring peaks of the sequence of opposite peaks, the predetermined minimum slope of 10% multiplied by the magnetic signal value difference between the peak values of the two, opposite neighbouring peaks divided by the time elapsed between the outputting of the two, opposite neighbouring peaks.

6. An assembly, comprising:

one or more coils; and

a processor connected to the one or more coils, where the processor is configured to output a voltage and/or current signal to the one or more coils to cause the one or more coils to output a magnetic signal, the voltage and/or current signal having, over time, a sequence of opposite voltage/current peaks, wherein the voltage and/or current signal has, apart from voltage/current signal portions on either side of each of the opposite voltage/current peaks and within 10% of a time duration between two opposite, neighbouring peaks of the sequence of opposite voltage/current peaks, a predetermined minimum slope of 10% multiplied by a voltage and/or current signal voltage/current difference between peak values of the two, opposite neighbouring voltage/current peaks divided by a time elapsed between outputting the two, opposite neighbouring voltage/current peaks.

7. The assembly according to claim 6, wherein the voltage and/or current signal, for at least a predetermined period of time after outputting each peak of the sequence of opposite voltage/current peaks, has a predetermined slope.

8. The assembly according to claim 6, wherein the voltage and/or current signal represents a binary signal having a first binary value and a second binary value, where the first binary value is represented by two opposite, neighbouring peaks of the sequence of opposite voltage/current peaks and where the second binary value is represented by a single peak of the sequence of opposite voltage/current peaks.

9. The assembly according to claim 6, wherein the voltage/current signal has, apart from voltage/current signal portions on either side of each of the opposite voltage/current peaks and within 1% of the time duration between two opposite, neighbouring peaks, the predetermined minimum slope of 10% multiplied by the voltage and/or current signal voltage/current difference between the peak values of the two, opposite neighbouring voltage/current peaks divided by the time elapsed between the outputting of the two, opposite neighbouring voltage/current peaks.

10. A method of transferring a magnetic signal, the method comprising:

one or more transmission coils outputting the magnetic signal which, over time, has a sequence of opposite peaks; and

a receiving coil receiving the magnetic signal and outputting an output signal which, over time, has a sequence of opposite peaks and, apart from output signal portions on either side of each of the opposite peaks and within 10% of a time duration between two opposite, neighbouring peaks of the sequence of opposite peaks, a predetermined minimum slope of 10% multiplied by an output signal value difference between peak values of the two, opposite neighbouring peaks divided by a time elapsed between outputting the two opposite, neighbouring peaks.

11. The method according to claim 10, wherein the output signal, for at least a predetermined period of time after outputting of each peak of the sequence of opposite peaks, has a predetermined slope.

12. The method according to claim 10, wherein the signal represents a binary signal having a first binary value and a second binary value, where the first binary value is represented by two opposite, neighbouring peaks of the sequence of opposite peaks and where the second binary value is represented by a single peak of the sequence of opposite peaks.

13. The method according to claim 10, wherein the outputting the magnetic signal includes feeding a signal to the one or more transmission coils.

14. The method according to claim 10, wherein the output signal has, apart from output signal portions on either side of each of the opposite peaks and within 1% of the time duration between the two opposite, neighbouring peaks, the predetermined minimum slope of 10% multiplied by the output signal value difference between the peak values of the two, opposite neighbouring peaks divided by the time elapsed between the outputting of the two opposite, neighbouring peaks.

15. An assembly, comprising:

a receiving coil;

one or more transmitting coils; and

a processor connected to the one or more transmitting coils,

wherein the processor is configured to output a voltage and/or current signal to the transmitting coils to cause the transmitting coils to output a magnetic signal, the voltage and/or current signal having, over time, a sequence of opposite voltage/current peaks,

wherein the receiving coil is configured to receive the magnetic signal and output an output signal which has a separate sequence of opposite voltage/current peaks and, apart from output signal portions on either side of each of the opposite peaks and within 10% of a time duration between two opposite, neighbouring peaks of the separate sequence of opposite voltage/current peaks, a predetermined minimum slope of 10% multiplied by an output signal voltage/current difference between peak values of the two, opposite neighbouring voltage/current peaks divided by a time elapsed between outputting of the two opposite, neighbouring peaks.

16. The assembly according to claim 15, wherein the voltage and/or current signal, for at least a predetermined period of time after outputting of each peak of the sequence of opposite peaks, has a predetermined slope.

17. The assembly according to claim 15, wherein the voltage and/or current signal represents a binary signal having a first binary value and a second binary value, where the first binary value is represented by two opposite, neighbouring peaks of the sequence of opposite peaks and where the second binary value is represented by a single peak of the sequence of opposite peaks.

18. The assembly according to claim 15, wherein the output signal which has, apart from output signal portions on either side of each of the opposite peaks and within 1% of the time duration between the two opposite, neighbouring peaks, the predetermined minimum slope of 10% multiplied by the output signal voltage/current difference between the peak values of the two, opposite neighbouring voltage/current peaks divided by the time elapsed between the outputting of the two opposite, neighbouring peaks.