Data card with inductive signal transfer device
First Claim
1. A data card having a planar surface which can be resiliently flexed to a degree comprising:
- a laminated structure member having at least a synthetic resin protective layer and a ferromagnetic material layer;
an electric circuit device embedded in the laminated structure member;
an electro-magentic transducer having a pair of coils including a first coil and a second coil which are formed on the laminated structure member, the pair of coils being coupled to the electric circuit device for generating magnetic fluxes of opposite directions with each other according to an information signal supplied from the electric circuit device; and
the magnetic flux generated by the first coil flowing in one direction vertical to the surface of the card at the center of first coil and the magnetic flux generated by the second coil flowing in an opposite direction vertical to the surface of the card at the center of the second coil forming a loop of magnetic flux.
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Accused Products
Abstract
A data card which can be resiliently flexed to a degree. The data card includes a laminated structure member having at least a synthetic resin protective layer and a ferromagnetic material layer, an electric circuit device embedded in the laminated structure member and an electro-magnetic transducer having a pair of coils which are formed on the laminated structure member. The pair of coils are coupled to the electric circuit device for generating magnetic fluxes of opposite directions with each other according to an information signal applied from the electric circuit device. Alternatively, the pair of coils are provided for receiving magnetic fluxes of opposite directions with each other and coupled to the electric circuit device for applying an electric signal generated by the magnetic fluxes of opposite directions thereto.
19 Citations
25 Claims
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1. A data card having a planar surface which can be resiliently flexed to a degree comprising:
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a laminated structure member having at least a synthetic resin protective layer and a ferromagnetic material layer; an electric circuit device embedded in the laminated structure member; an electro-magentic transducer having a pair of coils including a first coil and a second coil which are formed on the laminated structure member, the pair of coils being coupled to the electric circuit device for generating magnetic fluxes of opposite directions with each other according to an information signal supplied from the electric circuit device; and the magnetic flux generated by the first coil flowing in one direction vertical to the surface of the card at the center of first coil and the magnetic flux generated by the second coil flowing in an opposite direction vertical to the surface of the card at the center of the second coil forming a loop of magnetic flux. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A data card having a planar surface which can be resiliently flexed to a degree comprising:
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a laminated structure member having at least a synthetic resin protective layer and a ferromagnetic material layer; an electric circuit device embedded in the laminated structure member; an electro-magnetic transducer having a pair of coils including a first coil and a second coil which are formed on the laminated structure member, the pair of coils being provided for receiving magnetic fluxes of opposite directions with each other and coupled to the electric circuit device for applying an electric signal generated by the magnetic fluxes of opposite directions thereto; and the magnetic flux received by the first coil flowing in one direction vertical to the surface of the card at the center of the first coil and the magnetic flux received by the second coil flowing in an opposite direction vertical to the surface of the card at the center of the second coil forming a loop of magnetic flux. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25)
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Specification