Title:
COMMUNICATION METHOD OF READER/WRITER FOR IC CARD
Document Type and Number:
Japanese Patent JP3810983
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To detect the existence of an IC card regardless of the file structure of an IC card.
SOLUTION: This reader/writer transmits a command independent from a file in the case of detecting the existence of the IC card which obtains a communication protocol and a command previously. In this case, when the IC card is positioned in the communication area of the reader/writer, an IC card receiving the command makes response, thus the reader/writer decides the existence of the IC card. When the IC card is not positioned, the IC card does not make response, thus the reader/writer decides the absence of the IC card.
Inventors:
Kiyoshi Takahashi
Vine Hironi
Yoshimitsu Otani
Yasuhiro Nagai
Akihiko Kasuya
Vine Hironi
Yoshimitsu Otani
Yasuhiro Nagai
Akihiko Kasuya
Application Number:
JP2000130312A
Publication Date:
August 16, 2006
Filing Date:
April 28, 2000
Export Citation:
Assignee:
Denso Wave Co., Ltd.
Nippon Telegraph and Telephone Corporation
NT Electronics Co., Ltd.
Nippon Telegraph and Telephone Corporation
NT Electronics Co., Ltd.
International Classes:
B42D15/10; G06K17/00; G06K19/07; (IPC1-7): G06K17/00; B42D15/10; G06K19/07
Domestic Patent References:
| JP11015932A | ||||
| JP11003407A | ||||
| JP2000030008A |
Attorney, Agent or Firm:
Tsuyoshi Sato