Reader and/or writer apparatus, power feeding system, and communication system
US6608550B2 · kind B2 · utility
22Cited by
15References
10Claims
0Family size
Assignees
Inventors
Key dates
| Filing date | Dec 22, 2000 |
| Grant date | Aug 19, 2003 |
| Priority date | — |
| Expiry date | Jul 23, 2021 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06K19/0723
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A reader and/or writer apparatus having an antenna lying substantially in a plane for generating an electromagnetic field to supply power to an IC card and a conductor member to be disposed in a plane substantially parallel to the plane of the antenna, wherein the distance between the antenna and the conductor member is no greater than 20 mm. A power supplying system supplies power using electromagnetic waves from the reader and/or writer apparatus to the IC card. The IC card includes a circuit for converting the supplied power to a D.C. voltage and for supplying the D.C. voltage to an internal circuit of the IC card.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.