JPH07129732A - Information recording card and card system - Google Patents

Abstract

PURPOSE:To minimize the wrong use of a lost card itself or a copied or forged card by laminating a reversible thermosensitive layer on a card substrate and rewritably recording encoded information in this reversible thermosensitive layer. CONSTITUTION:The information recording card 10 has a card substrate 11 and a reversible thermosensitive layer 12 laminated on a part of one face of the card substrate 11. A part different by optical reflectivity is brought about or disappears in the reversible thermosensitive layer 12 in accordance with the heating temperature. A bar code pattern 121 is rewritably recorded in the reversible thermosensitive layer 12 as encoded ID information. For example, a recorder is used to rewrite the bar code pattern 121 with another bar code pattern where ID information practically have the same contents but the encoding form is changed and set everyday. Meanwhile, a reader changes the decoding form everyday in accordance with the encoding form set by the recorder.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an information recording card used as an ID card or the like on which personal information (ID information) used when entering or exiting a security-related field and a card system using the same.

[0002]

2. Description of the Related Art An information recording card of this type has a magnetic stripe formed on a plate made of plastic and has encoded ID information recorded on the magnetic stripe.

When this information recording card is used as an ID card, a reading device equipped with a magnetic head
The encoded ID information is read, and the read ID information is collated with the information stored in advance in the device.

[0004]

In the information recording card, if a reading device or a device similar thereto is used, the encoded information can be copied relatively easily.
There is a problem that a large number of cards may be forged based on this.

Usually, in operating a system using an information recording card, when the information recording card is lost, this card itself is used, or a card copied and forged as described above. It is considered that there is a possibility that abuse can be done by using, and measures are taken to prevent abuse. As this abuse prevention means, for example, when the loss is found, the lost card is invalidated by revising the information for collation in the reading device, that is, it is recorded in the lost card. The existing information is made unreadable or readable but the subsequent processing is stopped.

[0006] However, the above-mentioned abuse prevention means has a problem that there is a risk of misuse during the uncertain period from the loss of the information recording card to the time when the information recording card is revealed, that is, the period which may be a relatively long period. There is a point.

An object of the present invention is to provide an information recording card and a card system using the same, which can minimize the misuse of a lost card itself or a card that has been copied or forged.

[0008]

According to the present invention, a reversible thermosensitive layer in which portions having different optical reflectances are generated and disappear depending on a heating temperature is laminated on at least a part of a card substrate. An information recording card is obtained in which coded information is rewritably recorded on the reversible thermosensitive layer. The encoded information is recorded on the reversible thermosensitive layer by heating to a first temperature, while the information recorded on heating to a second temperature higher than the first temperature is erased. You may do it.

Further, according to the present invention, using the information recording card, a plurality of encoding formats are selectable, information is encoded in the selected encoding format and is thermally recorded on the information recording card. , A recording device for thermally erasing recorded information and a plurality of decoding formats corresponding to the plurality of encoding formats of the recording device are selectable, and the encoded data recorded on the information recording card is encoded. A reading device that optically reads the information and decodes the information in a selected decoding format, and in the reading device, the reading format is set to the coding format selected by the recording device among a plurality of decoding formats. A card system is obtained which is characterized in that the corresponding decoding format is selected.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An information recording card according to an embodiment of the present invention will be described below with reference to the drawings. 1A and 1B are plan views showing an information recording card according to this embodiment,
FIG. 1A and 1B, the information recording card 10 includes a card substrate 11 made of a resin material.
And a reversible thermosensitive layer 12 laminated on a part of one plate surface of the card substrate 11. Reversible thermosensitive layer 12
Has a reversible heat-sensitive function such that when heated, a portion having different optical reflectance is generated or disappears depending on the heating temperature.

A bar code pattern 121 is rewritably recorded on the reversible thermosensitive layer 12 as encoded ID information. That is, the barcode pattern 121 is recorded on the reversible thermosensitive layer 12 by the recording device described later.
Is recorded by heating to a predetermined temperature (first temperature). The bar code pattern 121 also causes the reversible thermosensitive layer 12 to reach a predetermined temperature (second
It is erased by heating to the temperature).

The reversible heat-sensitive layer 12 is a card substrate 11
It may be laminated on the entire surface instead of a part.

Next, an example of a card system using the information recording card 10 described above will be described.

FIG. 2 is a conceptual diagram showing this card system. In FIG. 2, the present system has a plurality of encoding formats that can be selected, encodes ID information in the selected encoding format, and thermally records a bar code pattern 121 on the information recording card 10 with the heating head 21. On the other hand, the recording device 20 that thermally erases the recorded bar code pattern 121 with the heating head 21 and the photo sensor 31 are provided, and a plurality of decoding formats corresponding to the plurality of encoding formats of the recording device 20 are provided. Information recording card 10
Coded bar code pattern 12 recorded in
Optically read 1 and ID in the selected decryption format
And a reader 30 for decoding the information.

When the recording device 20 records the barcode pattern 121 on the information recording card 10 in the selected encoding format, it outputs a signal indicating the encoding format. on the other hand,
The reading device 30 obtains a signal indicating the encoding format from the recording device 20, and based on this signal, selects the decoding format corresponding to the encoding format selected by the recording device 20 from the plurality of decoding formats. select.

More specifically, for example, by using the recording device 20, the bar code pattern 121 recorded on the information recording card 10 is changed in its encoding form every day even if the substantial contents of the ID information are the same. Set it and rewrite it. On the other hand, in the reading device 30, the decoding format is changed every day according to the encoding format set in the recording device 20.

As a result, the reading device 30 does not perform decoding in a decoding format other than the set decoding format for each day, so that the reading apparatus 30 is substantially the same except for the information recording card 10 having the ID information coded in the coding format set for that day. Will not be accepted. Therefore, in the case where the card is lost, there was a risk of misuse in the uncertain time until the loss was found, whereas in the system according to the present embodiment, the card was lost even if it was not found. Since the information recording card 10 and a card obtained by copying or forging the information recording card 10 cannot be used the next day, the risk of misuse is shortened to about one day at the longest, and the risk of misuse is reduced. . Of course, the setting change of the encoding and decoding formats may be, for example, every several hours, and is not limited to every one day.

Also, when it is found that the information recording card 10 is lost, the encoding format in the recording device 20 is changed to issue a new card, and the decoding format of the reading device 30 is also changed accordingly. To do so.

[0019]

The information recording card according to the present invention is formed by laminating a reversible heat-sensitive layer in which portions having different optical reflectances are generated and disappear depending on the heating temperature on at least a part of the card substrate. Since the encoded information is rewritably recorded on the heat-sensitive layer, it is possible to minimize the misuse of the lost card itself or a card copied or forged. Further, since it has no magnetic recording layer, data is not erased even when a strong external magnetic field is applied, and the reliability of data storage is high.

[Brief description of drawings]

1A and 1B are views showing an information recording card according to an embodiment of the present invention, in which FIG. 1A is a plan view and FIG. 1B is a sectional view.

FIG. 2 is a conceptual diagram showing a card system using the information recording card shown in FIG.

[Explanation of symbols]

 10 Information Recording Card 11 Card Substrate 12 Reversible Thermosensitive Layer 20 Recording Device 21 Heating Head 30 Reader 31 Photo Sensor 121 Bar Code Pattern

Claims (3)

[Claims] 1. A reversible thermosensitive layer in which portions having different optical reflectances are generated and disappear depending on heating temperature is laminated on at least a part of a card substrate. An information recording card, which is characterized by rewritable information being recorded. 2. The reversible thermosensitive layer records the encoded information by heating to a first temperature, while recording the encoded information by heating to a second temperature higher than the first temperature. The information recording card according to claim 1, wherein the stored information is erased. 3. The information recording card according to claim 1 or 2, which has a plurality of encoding formats that can be selected, encodes information in the selected encoding format, and thermally records the information on the information recording card. On the other hand, a recording device for thermally erasing recorded information and a plurality of decoding formats corresponding to the plurality of encoding formats of the recording device are selectable, and the encoding recorded on the information recording card is performed. A reading device for optically reading the stored information and decoding the information in a selected decoding format, wherein the reading device is a coding format selected by the recording device among a plurality of decoding formats. A card system characterized in that a decoding format corresponding to is selected.