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 a flow of current through the at least two inductors that results in a signal;
wherein, along an axis while the current flows through, each inductor has two effective areas where a signal strength is greater than a detection limit of the reader and a null region there between, where the signal strength is below the detection limit of the reader; and
wherein the inductors are positioned such that, along the axis, the null regions of the at least two inductors do not overlap, and the effective areas overlap along the axis, a total contiguous area of the signal along the axis having the signal strength being greater than any one of the effective areas and greater than the detection limit.
3 Assignments
0 Petitions
Accused Products
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.
-
Citations
22 Claims
-
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 a flow of current through the at least two inductors that results in a signal; wherein, along an axis while the current flows through, each inductor has two effective areas where a signal strength is greater than a detection limit of the reader and a null region there between, where the signal strength is below the detection limit of the reader; and wherein the inductors are positioned such that, along the axis, the null regions of the at least two inductors do not overlap, and the effective areas overlap along the axis, a total contiguous area of the signal along the axis having the signal strength being greater than any one of the effective areas and greater than the detection limit. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
-
-
18. A method of transmitting a signal to a signal reader, the method comprising:
-
providing a transmitter configured to transmit the signal to the signal reader, the transmitter comprising a driver circuit and at least two inductors connected to the driver circuit, wherein each inductor of the at least two inductors has, when driven, two effective areas where a signal strength is greater than that of a null region between the effective areas, and wherein the null regions of the at least two inductors do not overlap along an axis; positioning the at least two inductors of the transmitter near the signal reader; and flowing current, by the driver circuit, through the at least two inductors to generate a composite signal, wherein while the current flows through while positioned near the transmitter, each of the effective areas has a signal strength that is greater than a detection limit of the signal reader and each of the null regions has a signal strength that is below the detection limit, and the effective areas overlap along the axis to form the composite signal, a total contiguous area of the composite signal along the axis having the signal strength being greater than any one of the effective areas and greater than the detection limit. - View Dependent Claims (19, 20, 21, 22)
-
Specification