JPH07113960B2 - IC card - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Technical Field The present invention is an IC that can be used in a magnetic card reader.
More specifically, the present invention relates to an IC card that can select and output one card data from a plurality of card data.

(B) Summary of the Invention An IC card according to the present invention has a card data storage area for storing a plurality of card data, an output data selecting means for selecting one of the card data, and the card data as a magnetic field change. By providing the data output means for outputting, any card data selected by the user can be output as a change in the magnetic field, and a plurality of card functions can be given to one IC. is there.

(C) Background of the Invention Cards have been conventionally used as transaction media and customer authentication media in financial institutions. The most popular type of card at present is a so-called magnetic card having a magnetic stripe.

However, the magnetic card has the following drawbacks.

 Data is easily destroyed by an external magnetic field.

If you have some specialized knowledge, you can easily read data
Data can be written, and there is a risk that data will be stolen or unauthorized data will be rewritten.

The amount of data that can be stored is small, and it will not be possible to cope with future diversification of transaction forms.

In order to solve such a defect, an IC card incorporating an LSI having a memory and a CPU formed therein has been proposed and partially put into practical use. Communication between an IC card and a device such as an automatic transaction processing device is generally performed via a contact or a transmission line (bus).
Therefore, in order to use the IC card in such a device, it is necessary to mount a dedicated IC card reader.

However, as described above, since the magnetic cards are predominantly popular, most automatic transaction processing devices are currently equipped with only a magnetic card reader.

For this reason, even if the customer has an IC card, there are few automatic transaction processing devices that can be used at present and the functions cannot be fully utilized. This hinders the spread of IC cards.

However, mounting the IC card reader on the automatic transaction processing device requires a large amount of expense and labor. Furthermore, for the time being, magnetic cards will be used as transaction media and customer authentication media.
It may be possible to use an IC card together, but in order to be able to use both of them, it is necessary to install a magnetic card reader and an IC card reader in one automatic transaction processing device, which makes the device larger. In addition, there is a drawback that the price becomes high.

Furthermore, since a normal magnetic card is formed with only one magnetic stripe, the card can only be used for a single application. In order to use it for multiple purposes, it is necessary to form multiple magnetic stripes on the card surface, but if multiple magnetic stripes are formed, the area occupied by the magnetic stripe on the card surface becomes large, and There was a drawback that the display was disturbed.

In addition, many types of credit cards are currently issued and transaction types are diverse, but one card must be processed for each of these credit cards and transaction types, and card holding And handling is complicated. Since only one card data can be stored in one magnetic stripe, many magnetic stripes must be formed on the card surface in order to give one magnetic card various card functions. However, there is a limit to the formation of such a magnetic stripe, and the increase of the area occupied by the magnetic stripe on the card surface hinders the handling of the card and the design of the card.

(D) Object of the Invention The present invention has been made in view of the above circumstances, and an object thereof is to provide an IC card which can be used in a magnetic card reader and which can select and output various kinds of card data.

(E) Configuration and Effect of the Invention In the present invention, in an IC card having an IC including a memory built therein, a card data storage area for storing a plurality of card data is provided in the memory, and the card data storage area is stored. It is characterized in that output data selecting means for accepting selection of one card data from the card data and data outputting means for outputting the selected card data as a change in the magnetic field at a specific position on the card surface are provided.

According to the present invention configured as described above, the card data is output as a change in the magnetic field, so that the magnetic head can detect the change in the magnetic field, and the conventional magnetic card reader can also detect this data. Can be read. As a result, IC cards can be applied to devices that could previously only use magnetic cards, and ICs with high data storage and confidentiality can be used as customer authentication media.
You will be able to use the card.

Further, the IC card and the magnetic card can be used together without any trouble, and the medium can be smoothly transferred.

Further, since the output data selecting means can select and output one from a plurality of card data, various kinds of card data are stored in the IC memory and the card data necessary for each transaction is selected. Can be output.

As a result, many types of cards can be put together into one IC card, and the complexity of card forms and specifications can be eliminated.

(F) Embodiment FIG. 1 is a schematic configuration diagram of an IC card according to an embodiment of the present invention. The figure (A) shows a plan view of the appearance, and the figure (B) shows an internal structure diagram.

First, in FIG. 3A, 5 is a magnetic stripe. It is a magnetic stripe formed on a JISI track, and is composed of iron powder with low holding power. Therefore, no data is stored in the magnetic stripe 5, and when the magnetic stripe is inserted into the magnetic card reader, the magnetic stripe sensor only detects that the magnetic stripe is formed. That is, the magnetic stripe 5 is a dummy magnetic stripe and is formed so that the IC card can be used for a magnetic card reader. By not storing the data in the magnetic stripe 5, the confidentiality of the data, which is a characteristic of the IC card, is not deteriorated.

Contact points 4, 4'which are metal pieces are provided on both sides of the tip of the magnetic stripe 5 in the card insertion direction (arrow in the figure). The contacts 4 and 4'are for detecting the presence of the magnetic head of the magnetic card reader at this position, and are connected to the LSI 1 inside the card (see FIG. 1B). Further, a numeric keypad 6 is provided on the lower right part of the front surface of the card. This numeric keypad 6 is also connected to the LSI 1 inside the card.

In FIG. 2B, the lithium battery 3 and the magnetic field generating element 2 are connected to the LSI 1 in addition to the contacts 4, 4'and the numeric keypad 6. The magnetic field generating element 2 is formed by winding a conductive wire around a magnetic core 2a made of thin rectangular ferrite, and generates a magnetic field perpendicular to the surface of the card. One of the long sides of the magnetic core 2a is arranged directly below the magnetic stripe 5, and the magnetic flux is effectively supplied to the magnetic head of the magnetic card reader passing above the magnetic stripe 5. You can do it. Further, when the magnetic stripe 5 is an effective magnetic stripe, the long side of the rectangular magnetic core 2a is formed over the entire area for storing card data, and the magnetic head of the magnetic card reader reads the card data. Therefore, when passing through this position, the magnetic field generated by the magnetic field generating element 2 can be detected.

FIG. 2 shows an internal block of the LSI1. This LSI 1 is composed of a one-chip microcomputer and an analog tenkey circuit. First, the CPU1 which is the control device
0 and EEP to store required programs and data
A microcomputer is configured with a memory 11 including a ROM and a RAM that is a work area. A modulator 12, a detector 14 and the ten-key pad 6 are connected to the microcomputer via a transmission line, and an amplifier 13 is connected to the modulator 12. These CPU 10, memory 11, modulator 12, amplifier
The LSI 13 is composed of 13 and the detector 14. The magnetic field generating element 2 is connected to the amplifier 13, and the contacts 4 and 4'are connected to the detector 14. Ie detector 1
Reference numeral 4 is a circuit for detecting the presence of the magnetic head on the contacts 4, 4 ', and the modulator 12 and the amplifier 13 FM-modulate the card data of the memory 11 input via the CPU 10 to obtain a sufficient output. This is a circuit that is input to the magnetic field generating element 2 after being amplified.

FIG. 3 is a partial configuration diagram of the memory 11 (EEPROM).
Areas M1 (hereinafter, "area Mi" is referred to as "Mi") and M2 store different card data and passcodes corresponding to the respective card data. When the passcode (M11, M21) corresponding to each card data (M12, M22) is input from the ten-key pad 6, the CPU
Reference numeral 10 reads out card data having a matched pass code and inputs it to the modulator 12. Here, the pass code may simply be a one-digit or two-digit number indicating the storage order of the card data, but by setting it to a number that can be arbitrarily set by the user, for example, a four-digit number, A passcode (personal identification number) is set in the card data that can be kept confidential).

FIG. 4 is a flowchart showing the operation of the control unit of the IC card. Step n1 (Hereafter, “step ni” is replaced by “n
i ”. ) And waits until the ten key 6 is operated and a passcode is input. When the pass code is input, the code is stored in the buffer set in the RAM of the memory (n2), and the card data storage area is searched with this pass code (n3). If there is card data identified by this passcode, n5 is judged by n4.
If it does not exist, the operation directly ends. n5
Then, this card is inserted into the magnetic card reader, waits until the magnetic head for data reading comes to the position of the contacts 4, 4 ', and when the contacts 4, 4'and the detector 14 detect the magnetic head, n6 Proceed to. Modulator 12 and amplifier 13 for n6
Then, the corresponding data is read from the memory 11 and sequentially input to the modulator 12 (n7). By this operation, the card data is output from the magnetic field generating element 2 as a change in magnetic field.

The FM modulation performed by the modulator 12 is inverted every reference clock, and when the data displayed in the reference clock is 1, it is inverted once between the reference clocks, and the data displayed is 0. Is a system that does not invert between reference clocks.

The ten keys 6 and n1 to n4 correspond to the output data selecting means of the present invention, and n7 corresponds to the data outputting means of the present invention.

As described above, according to this IC card, the card data stored in the IC memory can be output as a change in the magnetic field, so that the magnetic head that reads the data of the magnetic stripe when inserted into the magnetic card reader The data can be read. Further, a plurality of card data is stored in the memory, and the numeric keypad 6
By enabling one of the data to be selected and output by this, it is possible to have multiple card functions with this one IC card and prevent an increase in the number of cards due to the spread of card transactions and credit transactions. be able to. Furthermore, by selecting the card data stored in the memory by entering the pass code, the card data cannot be output to anyone other than the original user. Data confidentiality and transaction security can be improved.

[Brief description of drawings]

1 (A) and 1 (B) are an external view and an internal structure view of an IC card according to an embodiment of the present invention, and FIG. 2 is the IC.
Block diagram of the LSI built into the card, Fig. 3 shows the LSI
FIG. 4 is a partial configuration diagram of the memory included in FIG. 4, and FIG. 4 is a flowchart showing the operation of the control unit of the IC card. 6 ... Numeric keypad, 11 ... Memory.

Claims (1)

[Claims] 1. An IC card having a built-in IC including a memory, wherein a card data storage area for storing a plurality of card data is provided in the memory, and one card data is stored from the card data stored in the card data storage area. The IC card is provided with output data selection means for receiving the selection of, and data output means for outputting the selected card data as a change in the magnetic field at a specific position on the card surface.