Title:
INFORMATION TRANSMITTER-RECEIVER
Document Type and Number:
Japanese Patent JP2003006592
Kind Code:
A
Abstract:
To overcome the problems that it is required to bring a non-contact IC card close to RWU, power is varied by the change of the direction of the non-contact IC card and noise enters data since the power and the data are transmitted between external terminal equipment and the non-contact IC card by one antenna coil.
An information transmitter-receiver is provided with an IC chip part 25, the antenna coils 22-25 having different antenna lengths and a secondary battery 27. The secondary battery 27 is charged by electromagnetic waves transmitted from portable equipment 38 such as a portable telephone. The data are exchanged with the external terminal equipment 39 by using the power from the secondary battery 27.
Inventors:
YAMAMOTO TORU
YAMADA YOSHINORI
YAMADA YOSHINORI
Application Number:
JP2001188123A
Publication Date:
January 10, 2003
Filing Date:
June 21, 2001
Export Citation:
Assignee:
MATSUSHITA ELECTRIC IND CO LTD
International Classes:
B42D25/305; G06K19/07; G06K19/077; H01L25/00; H01Q1/24; H01Q5/00; H01Q7/00; H04B5/02; (IPC1-7): G06K19/07; B42D15/10; H01L25/00; H01Q1/24; H01Q5/00; H01Q7/00; H04B5/02
Attorney, Agent or Firm:
Miyai Akio
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