Registers – Records – Conductive
Patent
1997-12-11
2000-05-30
Le, Thien M.
Registers
Records
Conductive
235493, G06K 1906
Patent
active
060681934
DESCRIPTION:
BRIEF SUMMARY
DESCRIPTION
According to the generic part of the patent claim, the invention relates to chip cards (4) and their terminals (1) which contact-free and/or via contact connections exchange data and energy with chip cards.
Chip cards are known which--with or without contacts--exchange energy and data with their terminals (read/write devices). These cards are used for numerous applications such as, for example, telephone cards, medical cards, access control cards. An overview of such cards and their applications is compiled in three editions of the German publication Elektronik of the year 1993. A chip card is known from DE 39 35 364 C1 which contains contacts and contact-free transmission elements.
The invention is based on the objective of making the information transfer and information reception by chip cards comparable to that of todays magnetic strip cards. According to the invention, it should also be possible to generate the usual data formats of the type used nowadays on the magnetic strips of magnetic strip cards by chip cards that function contact-free, also with the contact-free transfer of information. Moreover, the information that is transferred contact-free should be transferred in a certain logical form (protocol) or physical modulation form in such a way that a clear recognition of the information and its content is reproducibly possible in the same manner for different devices. Due to this form of reproducibility of the contactless information transfer, it should be possible for the information of different cards to be interpreted in the same manner by different terminals. Moreover, it should be possible to load security codes anew by means of contact segments into the information provided contact-free.
These objectives are achieved by the features indicated in the claims.
FIG. 1 schematically shows the terminal (1) with the electronic memory (5) as well as a data line (13) to a remotely located device. Reference numeral (4) refers to the chip card containing an electronic circuit (2) which autonomously activates itself in an electromagnetic field. Reference numeral (9) stands for the energy fed in electromagnetically, numeral (8) designates the information flow that has been transmitted by the chip card (4) to the terminal (1) without contact. Numeral (3) refers to the part of the circuit arrangement (2) that, according to the invention, can exclusively transfer the data without contact and exclusively receive data via the contacts (6) or the two coils (12). Numeral (11) refers to a magnetic strip.
FIG. 2 with the designation (7) represents the electromagnetic contact-free feed of energy as the source of the contact-free sending of data (8) by the component (3). Numeral (10) designates the bi-directional exchange of data of the component (3) via the contacts (6) or coils (12).
The invention relates to terminals (1) for exchanging data and energy with chip cards (4) (Smartcards) which can function in various alternative versions, namely, with contact, without contact as well as with and without contact. The chip cards stand out for the fact that a part of their electronic component (2) autonomously activates itself in an external electromagnetic field when a certain energy density is reached. Once the card has been activated, it can electromagnetically transfer information from its component (3) (e.g. from an electronic memory) contact-free or optionally it can receive information. The transferred information includes information/data (8) of the type transferred on conventional magnetic strips (11). Thus, according to the invention, a chip card that functions contact-free sends out information to its terminal, whereby said information corresponds to the information content of magnetic strip cards. On the basis of this information (8), the terminal (1) can precisely generate the data in terms of form and content in the way that a magnetic strip card would also generate it when read by a magnetic reading head in a magnetic strip reading device. This data can be stored in the memory (5) of the t
REFERENCES:
patent: 4575621 (1986-03-01), Dreifus
patent: 4701601 (1987-10-01), Francini et al.
patent: 4868376 (1989-09-01), Lessin et al.
patent: 5206495 (1993-04-01), Kreft
patent: 5847372 (1998-12-01), Kreft
Angewandte Digital Elektronik GmbH
Kasper Horst M.
Le Thien M.
Sherr Daniel H.
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