Source: https://patents.google.com/patent/US20080169905A1/en
Timestamp: 2019-10-18 18:49:58
Document Index: 444676471

Matched Legal Cases: ['art 40', 'art 41', 'art 42', 'art 40', 'art 41', 'art 40', 'art 41', 'art 40', 'art 40', 'art 41', 'art 41', 'art 41', 'arts 40', 'arts 40', 'art 40', 'art 41', 'art 40', 'art 40', 'art 40', 'art 40', 'art 40', 'art 41', 'arts 40', 'arts 40', 'arts 40', 'art 51', 'art 52', 'art 51', 'art 52', 'art 40', 'art 41', 'art 52', 'art 51', 'art 52']

US20080169905A1 - Inductive Coupling in Documents - Google Patents
Inductive Coupling in Documents Download PDF
US20080169905A1
US20080169905A1 US11/718,236 US71823605A US2008169905A1 US 20080169905 A1 US20080169905 A1 US 20080169905A1 US 71823605 A US71823605 A US 71823605A US 2008169905 A1 US2008169905 A1 US 2008169905A1
US11/718,236
US7855646B2 (en
2004-10-29 Priority to GB0424158.4 priority Critical
2004-10-29 Priority to GB0424158A priority patent/GB2419779A/en
2005-09-27 Application filed by Hewlett Packard Development Co LP filed Critical Hewlett Packard Development Co LP
2005-09-27 Priority to PCT/EP2005/054830 priority patent/WO2006045682A1/en
2008-03-03 Assigned to HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P. reassignment HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: SLATTER, DAVID NEIL
2008-07-17 Publication of US20080169905A1 publication Critical patent/US20080169905A1/en
2010-12-21 Publication of US7855646B2 publication Critical patent/US7855646B2/en
230000001808 coupling Effects 0 abstract claims description title 183
238000010168 coupling process Methods 0 abstract claims description title 183
238000005859 coupling reaction Methods 0 abstract claims description title 183
230000001939 inductive effects Effects 0 claims description title 9
FIG. 6 a shows a part of a document having a yet further coupling circuit providing an embodiment of the present invention,
FIG. 6 b shows a reverse side of the document of FIG. 6 a,
To permit the read/write device 16 to communicate with the memory tag 14 over a longer distance a coupling circuit 17 is provided as shown in more detail in FIG. 4. The coupling circuit 17 comprises a first, relatively small coupling part 40, a second, relatively large coupling part 41, and a connecting part 42 connecting the first coupling part 40 and second coupling part 41. In this example, the first coupling part 40 and the second coupling part 41 are almost complete circles, the inner coupling part ending at a first end part 40 a and a second end part 40 b. The second coupling part 41 likewise ends at a first end part 41 a and a second end part 41 b. The coupling comprises a first line 42 a extending between the first end parts 40 a, 41 a and a second line 42 b extending between the second end parts 40 b, 41 b. In the present example, the first coupling part 40 has a diameter of about 2D or 2 mm, while the second coupling part 41 has a diameter of about 5 to 15 mm, on this example about 10 mm. The diameter of the first coupling part 40 is selected such that a memory tag 40 can be located within the first coupling part 40 with a relatively small distance between the memory tag 14 and the first coupling part 40 to ensure good coupling between the first coupling part 40 and the antenna 26 on the memory tag 14.
Referring now to FIG. 5, a further coupling circuit 17′ is shown. In the coupling circuit 17′, the first coupling part 40 and second coupling part 41 are the same as those shown in the embodiment of FIG. 4. In this example however, a coupler 42′ includes a cross over, such that opposite end parts 40 a and 41 b are corrected and end parts 40 b and 41 a are connected. This is formed by printing a first track 42′a on the substrate 10, printing a non-conductive layer 43 over the track 42 a and subsequently printing a second track 42′b over the non-conductive layer 43. By providing this crossover in the coupler 42, the direction of magnetic flux in the first and second coupling parts 40, 41 will be directed in the same direction, and not in opposing and thus partially cancelling directions as in the circuit of FIG. 4.
The first coupling part and second coupling part need not be printed with the layout as shown or even on the same side of the paper, and where appropriate there need not be direct electrical connection between the first coupling part and the second coupling part. For example, a further coupling circuit 50 is shown in FIGS. 6 a and 6 b in which a first coupling part 51 is printed on one side of the paper 10 and a second coupling part 52 is printed on the opposite side of the paper 10. The first coupling part 51 and second coupling part 52 are the same size as the first coupling part 40 and second coupling part 41 of FIGS. 4 and 5. The connecting part comprises a first coupling loop 53 connected to the first coupling part and a second coupling loop 54 connected to the second coupling part 52. The coupling loops 53, 54 are printed on opposite sides of the paper such that they substantially overlie one another to provide inductive coupling there between and thus coupling the first coupling part 51 and second coupling part 52.
the coupling circuit comprising
a first coupling part for coupling to a memory tag and of a size to receive a memory tag within the first coupling part,
a second coupling part for coupling to a reader, the first coupling part being smaller than the second coupling part, and
a connecting part to connect the first coupling part and the second coupling part.
a first coupling part for coupling to a memory tag,
a connecting part to connect the first coupling part and the second coupling part,
the document further comprising a memory tag located within the first coupling part.
a second coupling part for coupling to a reader, the first part being smaller than the second part, and
a connecting part to connect the first coupling part and the second coupling part
US11/718,236 2004-10-29 2005-09-27 Inductive coupling in documents Expired - Fee Related US7855646B2 (en)
GB0424158.4 2004-10-29
GB0424158A GB2419779A (en) 2004-10-29 2004-10-29 Document having conductive tracks for coupling to a memory tag and a reader
PCT/EP2005/054830 WO2006045682A1 (en) 2004-10-29 2005-09-27 Inductive coupling in documents
US20080169905A1 true US20080169905A1 (en) 2008-07-17
US7855646B2 US7855646B2 (en) 2010-12-21
ID=33515859
US11/718,236 Expired - Fee Related US7855646B2 (en) 2004-10-29 2005-09-27 Inductive coupling in documents
US (1) US7855646B2 (en)
GB (1) GB2419779A (en)
WO (1) WO2006045682A1 (en)
2004-10-29 GB GB0424158A patent/GB2419779A/en not_active Withdrawn
2005-09-27 WO PCT/EP2005/054830 patent/WO2006045682A1/en active Application Filing
2005-09-27 US US11/718,236 patent/US7855646B2/en not_active Expired - Fee Related
US20120223148A1 (en) * 2007-07-09 2012-09-06 Murata Manufacturing Co., Ltd. Wireless ic device
US8552870B2 (en) * 2007-07-09 2013-10-08 Murata Manufacturing Co., Ltd. Wireless IC device
GB0424158D0 (en) 2004-12-01
WO2006045682A1 (en) 2006-05-04
GB2419779A (en) 2006-05-03
US7855646B2 (en) 2010-12-21
Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:SLATTER, DAVID NEIL;REEL/FRAME:020589/0004