Communications: electrical – Condition responsive indicating system – With particular coupling link
Reexamination Certificate
2005-12-16
2008-07-15
Trieu, Van T. (Department: 2612)
Communications: electrical
Condition responsive indicating system
With particular coupling link
C340S572100, C340S426170
Reexamination Certificate
active
07400243
ABSTRACT:
A communication apparatus for a vehicle can achieve an inexpensive technique for determining whether a portable unit exists inside or outside the vehicle without depending upon LF band radio waves through contactless communication using high frequency band radio waves by separating a reader function of a reader/writer into the portable unit and an on-board unit. The apparatus includes at least one ID transmitter installed on a vehicle and sends a transmitter ID possessed by itself in response to reception of a radio wave, an on-board unit installed on the vehicle for radiating a radio wave to the ID transmitter, a portable unit that receives the transmitter ID sent by the ID transmitter, and an ID communication section for sending the transmitter ID from the portable unit3to the on-board unit. The on-board unit determines the position of the portable unit based on the transmitter ID received from the portable unit.
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Klaus Finkenzeller, “RFID Handbook: Fundamentals and Applications in Contactless IC Cards”, ISBN 4-526-05291-4, Published by Nikkan Koyo ShinbunCo., Translated by Software Engineer Laboratory (SOFEL), 2ndPrinting, May 2004, pp. 110-129.
Japanese Communications dated Feb. 4, 2008.
Katayama Masahiko
Ono Masayoshi
Ooba Tetsuya
Sumida Masato
Uehara Naohisa
Mitsubishi Denki & Kabushiki Kaisha
Trieu Van T.
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