JP2643342B2 - IC card display system - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to an IC card provided with a reversible color-changing member that can be turned on and off only by irradiating light on a display unit, and an IC card that rewrites display contents according to a use situation. The present invention relates to an IC card display system including a terminal.

[Conventional technology]

First, an IC card will be described as an example of a card having a memory and a display function. The IC card has a data processing function (CPU) and a memory function therein, and can perform very accurate verification of the owner and verification of the card body. Further, data read / write and falsification prevention are easy, and a large memory capacity is provided, so that application development is being made in a wide range of fields.

FIG. 7 is a diagram showing a configuration of a conventional card system described in, for example, JP-A-62-239286. In the figure, reference numeral (10) denotes an IC card, a semiconductor module (11) having a CPU having data collation and protection functions and a memory for storing information on the state of use, and a visible magnetic display unit for displaying specific information of the memory (11). 12) is embedded in the card base (13). In this visible magnetic display section (12), high permeability magnetic particles are sealed together with a special fine powder fluidizer,
It is attracted and formed in a desired pattern by the magnetic action.
(30) Inserts the IC card (10), depending on usage
A terminal that updates the memory contents of the IC card (10) and rewrites the display contents of the display unit (12).
0) and a reader / writer (31) for teaching data, a data processor (32) for processing data, and an IC card (1
0) a display conversion device (33) for generating data to be displayed on the display section (12), and magnetic heads (34) for recording and erasing,
(35).

The operation of the system when the IC card is applied to a passenger coupon will be described. If the IC card coupon is inserted into a predetermined dedicated terminal at the time of use, the balance is sequentially subtracted according to the amount or the number of times used, and at the same time the balance at that time is displayed on the display unit (12), and the contents are displayed. It can be confirmed. If a rewritable memory is used, the same card can be used as a coupon as many times as possible, and since the card itself has an arithmetic function, it can be used for a plurality of purposes. At this time, if the card display system shown in FIG. 7 is applied, the memory information of the IC card is transmitted and received via the reader / writer (31) according to the use state,
The content is updated by the data processing device (32). In other words, card verification such as issuer confirmation, boarding point confirmation,
After the calculation processing of the boarding distance, the fare, etc. is performed, it is settled, and information such as the balance is stored in the memory of the IC card. At the same time, the information is converted into a desired display figure by the display conversion device (33), and is displayed by the recording magnetic head (34) on the display section previously erased by the erasing head (35). The visible magnetic display system requires magnetic heads for recording and erasing, respectively.

As another display system, for example, Japanese Patent Application Laid-Open No. Sho 62-163192 describes a display system using a photothermochromic material for a display unit. In this method, display contents are erased by light irradiation, and new display information is thermally printed.

[Problems to be solved by the invention]

In the conventional card display system as described above, a magnetic head is required for the visible magnetic type as a means for erasing and recording, or a light source and a heat source are required for the photothermochromic type. There was a problem of becoming.

The present invention has been made to solve such a problem, and an object of the present invention is to provide a card display system in which display contents can be rewritten only by a light source.

[Means for solving the problem]

In the display system for an IC card according to the present invention, a semiconductor module for storing information of a use state and a reversible color changing member for receiving and erasing light having different wavelengths are fixed, and the specific information of the semiconductor module is displayed. Having a display unit
An IC that updates the contents stored in the semiconductor module according to the use state of the IC card and the IC card, and irradiates the reversible color changing member of the display unit with light having a different wavelength to rewrite the display contents of the specific information. It has a card terminal.

[Action]

In the present invention, the reversible color-changing member of the IC card display unit receives and emits light having different wavelengths, and the display content is rewritten.

〔Example〕

FIG. 1 is a diagram showing an example of an IC card used in an IC card display system according to one embodiment of the present invention. This IC
The card is an example applied to a coupon ticket (11),
(13) is the same as the conventional one. (21) is an IC card (20) fixed by being buried in the card base (13)
Is a display unit. It is designed to receive light of different wavelengths
It is made of a reversible discoloring member such as a photochromic material for decoloring, and displays specific information of a memory in the semiconductor module (11). FIG. 2 is a diagram showing a cross section of one configuration of the display unit (21) of the IC card (20), wherein (22) is the above-mentioned photochromic material, which comprises a card base (13) and a transparent sheet (23). It is enclosed with a transparent binder (binder) in the interposed space (24). By irradiating this portion with light having different wavelengths from the upper transparent sheet side to form a predetermined pattern according to the contents of the memory, the portion can be erased or colored.

The photochromic material used here that changes color reversibly only by light irradiation, for example, is colored in the visible region by irradiation with ultraviolet light, does not easily disappear by natural light, but is decolorized by irradiation with visible light, and this process is repeated. Spiropyran, azobenzene, fulgide, thioindigo, polycyclic aromatic compounds and the like can be applied.

In addition, as the transparent binder enclosed with the photochromic material, a dispersed or copolymerized polymer matrix can be used.

FIG. 3 is a diagram showing a configuration of an IC card display system according to one embodiment of the present invention. In the figure, (20) is an IC card exemplified in FIG. 1, (40) is an IC card (20). A terminal that is inserted and updates the contents of the memory of the IC card (20) and rewrites the contents of the display unit (21) according to the usage state. In this terminal (40), updating of the memory content of the IC card (20) is the same as in the past. On the other hand, display contents are rewritten by a display conversion device (41) for converting information corresponding to the contents of the memory into a desired display graphic and a light irradiation device (42) for irradiating light having different wavelengths at the time of erasing and recording. Going. Here, as the light irradiation device (42), a plurality of light sources for recording and erasing, or a combination of a single light source and a filter can be used.

Further, for image formation, a method using a mask or a shutter such as a liquid crystal, a method of moving light in a beam shape, and the like can be applied.

In this way, when used as a coupon, the balance is displayed on the surface of the card, which is very convenient for actual use.

In the above embodiment, a numerical display is used as the display content. However, as shown in FIG. 4, a method of filling points according to the frequency of use is used, and as shown in FIG. 5, a point is displayed with a bar line length. 6, a percentage display method of displaying a circular area as shown in FIG. 6 can be used, and the display content can be appropriately set according to the application field.

In addition, although the application of IC cards to coupon tickets has been described, the use of a plurality of photochromic materials enables color display, and the display speed is reduced because the display content is rewritten only by light irradiation. Needless to say, since it can be remarkably fast, it can be applied to various fields.

〔The invention's effect〕

As described above, according to the present invention, a semiconductor module for storing information on a use state and a reversible color-changing member for receiving / decoloring light having different wavelengths are fixed, and a display unit for displaying specific information on the semiconductor module is provided. IC card with
And an IC card terminal that updates the storage contents of the semiconductor module according to the use state of the IC card and rewrites the display contents of the specific information by irradiating light having a different wavelength to the reversible color changing member of the display unit. With the configuration, the display contents can be quickly rewritten only by the light source, and the system can be simplified.

[Brief description of the drawings]

FIG. 1 is a diagram showing an example of an IC card used in an IC card display system according to one embodiment of the present invention, and FIG.
FIG. 3 is a diagram showing a cross section of one configuration of a display unit of an IC card, FIG. 3 is a diagram showing a configuration of an IC card display system according to an embodiment of the present invention, and FIGS. FIG. 7 is a diagram showing an example of the contents, and FIG. 7 is a diagram showing the configuration of a conventional card system. In the figure, (20) is an IC card, (21) is a display unit using a reversible color changing member (photochromic material), (40) is an IC card terminal, and (42) is a light irradiation device. In the drawings, the same reference numerals indicate the same or corresponding parts.

 ──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Norimoto Moriwaki 8-1-1, Tsukaguchi-Honmachi, Amagasaki-shi, Hyogo Mitsubishi Materials Corporation Materials Research Laboratory (56) References JP-A 1-262194 (JP, A) Kaisho 61-105178 (JP, U)

Claims (1)

(57) [Claims] 1. An IC comprising: a semiconductor module for storing information on a use state; and a reversible color-changing member for receiving / decoloring by receiving light of different wavelengths, and a display unit for displaying specific information of the semiconductor module. Card, and an IC card terminal for updating the storage content of the semiconductor module according to the use state of the IC card and rewriting the display content of the specific information by irradiating light having different wavelengths to the reversible color changing member of the display unit A display system for an IC card, comprising: