Power transmission system, power transmission/communication system and reader and/or writer
US6164532A · kind A · utility
12Cited by
8References
15Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 5, 1998 |
| Grant date | Dec 26, 2000 |
| Priority date | — |
| Expiry date | May 5, 2018 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02J50/80
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
The present invention provides a power transmission/communication system for transmitting power from a reader and/or writer to an IC card by an electromagnetic wave and performing transmission or transmission and reception of a communication signal between the reader and/or writer and the IC card by an electromagnetic wave, wherein the intensity of a magnetic field induced by the electromagnetic wave outputted from the reader and/or writer, i.e., the magnitude of power induced thereby and the time required to transmit the power are controlled.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.