Transmitter and Method for Substantially Reducing Dead Zones in an Inductive Contactless Mobile Payment System
First Claim
Patent Images
1. A transmitter to generate a signal to be read by a reader, comprising:
- a driver circuit; and
at least two inductors connected to the driver circuit;
wherein the driver circuit controls the current flow through the inductor that results in a signal;
wherein each inductor has at least one null region, wherein the signal strength is below the detection limit of the reader; and
wherein the inductors are positioned such that the null regions of the inductors do not overlap.
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Abstract
A transmitter to generate a signal to be read by a reader is described. The transmitter includes a driver circuit; and at least two inductors connected to the driver circuit. The driver circuit controls the current flow through the inductor and the current flow results in a signal such that the signal strength is above the detection limit of the reader for each of the inductors which may have at least one null region. Additionally, the inductors are positioned such that the null regions of the inductors do not overlap.
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Citations
29 Claims
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1. A transmitter to generate a signal to be read by a reader, comprising:
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a driver circuit; and at least two inductors connected to the driver circuit; wherein the driver circuit controls the current flow through the inductor that results in a signal; wherein each inductor has at least one null region, wherein the signal strength is below the detection limit of the reader; and wherein the inductors are positioned such that the null regions of the inductors do not overlap. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 21)
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20. A transmitter to generate a signal to be read by a reader, comprising:
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a driver circuit; and an inductor connected to the driver circuit; wherein the driver circuit controls the current flow through the inductor that results in a signal transmission; and wherein the driver circuit passes the current through the inductor multiple times while the inductor is moved relative to the reader head passing through a number of positions; and wherein at at least one of the number of positions the inductor passes through the inductor produces a transmission signal that is greater than the reader threshold for a good data read.
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22. A method of driving a transmitter that includes a driver circuit and at least two inductors connected to the driver circuit with each inductor having at least one null region with a signal strength below the detection limit of a signal reader, wherein the driver circuit controls the current flow through the inductor that results in a signal, said method comprising the steps of:
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positioning the at least two inductors in the transmitter so that the null regions of the inductors do not overlap; and flowing current through the at least two inductors to generate a composite signal. - View Dependent Claims (23, 24, 25, 26, 27, 28)
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29. A method to generate a signal to be read by a reader by a transmitter including a driver circuit and an inductor connected to the driver circuit, said method comprising the steps of:
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flowing a current through the inductor multiple times to produce repeated signals for transmission; moving the inductor relative to the reader head passing through a number of positions while the current is being passed through the inductor; wherein at at least one of the number of positions the inductor passes through, the inductor produces a transmission signal that is greater than the reader threshold for a good data read.
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Specification