发明名称 |
POWER TRANSMISSION SYSTEM, POWER TRANSMISSION/COMMUNICATION SYSTEM AND READER AND/OR WRITER |
摘要 |
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.
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申请公布号 |
CA2237657(C) |
申请公布日期 |
2001.10.09 |
申请号 |
CA19982237657 |
申请日期 |
1998.05.14 |
申请人 |
HITACHI LTD. |
发明人 |
UESAKA, KOUICHI;SUGA, TAKASHI;HAYASHI, YOSHIHIKO;MAKUUCHI, MASAMI;YOSHINO, RYOZO |
分类号 |
G06K7/00;G06K7/08;G06K19/07;H02J5/00;(IPC1-7):G06K19/077;H04B5/02;G07F7/08 |
主分类号 |
G06K7/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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