JP2004102384A - IC card display method, IC card and IC card display system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an IC card which does not need a device nor a reader/writer exclusively used for checking contents of the IC card, and displays items besides the display items determined in issuing the card. <P>SOLUTION: At least one of the information utilized by an owner of the IC card in discriminating the application installed in the IC card and the information referred by the owner in utilizing the application installed in the IC card is displayed on a display part by means of at least one or more of characters, figures, symbols and drawings. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a multi-application IC card having a display function on a card surface, an IC card display method used to control characters and images displayed on the surface, and to visualize information inside the card on the card surface. The present invention relates to an IC card and an IC card display system.
[0002]
[Prior art]
Since an IC card has a memory capable of storing a larger amount of data than a magnetic card or the like, one card can store a large amount of information. Also, since the data is managed by the microcomputer, the security is high. For this reason, it has been used in various fields such as employee ID cards, commuter passes, cash cards, and credit cards. However, since the data in the memory is electronic information, it is necessary to use an IC card to know the contents. It is necessary to read the contents from a reading device such as a reader / writer and perform processing such as displaying them on a display or outputting them on paper.
[0003]
In order to solve such problems, for example, an IC card as disclosed in Japanese Patent Laid-Open No. 7-68978 has been proposed. This is provided with a rewritable layer capable of rewriting an image on the surface of an IC card. In the rewrite layer, desired data can be displayed as visible information on the card surface, and the display data can be rewritten as many times as necessary. Such an IC card is very convenient because necessary data in the IC card such as the display of the expiration date and the available balance can be displayed as visible information.
[0004]
[Problems to be solved by the invention]
Although the information recorded in the chip of the IC card has high security, a special device is required to view the contents. Further, when displaying information on the card surface, a process of printing on the card surface by a card reader / writer having a printing function is required. Further, the display contents are limited to display items determined at the time of issuing the card, and it is difficult to change the display items after issuing the card.
[0005]
[Means for Solving the Problems]
The above problem can be solved by the following invention.
[0006]
In the invention according to claim 1,
A method of displaying an IC card having a display unit for displaying information,
At least one of information that can be used when the owner of the IC card identifies the application installed on the IC card, or information that can be referred to when using the application installed on the IC card. Information
The problem can be solved by providing a method for displaying an IC card, characterized in that the display unit uses at least one of letters, numbers, symbols, and graphics to display the information.
[0007]
The information that can be referred to when using the application installed on the IC card is, for example, points and miles that can be used at present, such as various kinds of information that is stored in the IC card and changes. It is possible. Other examples include advertisements and coupons. On the other hand, when using an application installed in the IC card, there are a credit card, a membership card, and the like.
[0008]
In the invention according to claim 2,
2. The method according to claim 1, wherein when two or more applications are installed on one of the IC cards, at least one of the information on each of the two or more applications is displayed side by side on the display unit. The problem can be solved by providing an IC card display method described in (1).
[0009]
The display unit on the IC card may be provided with a plurality of display units or a continuous display unit. For example, the former is used to display a different application for each display unit, and the latter is displayed so that the display area on the display screen is different for each application.
[0010]
In the invention according to claim 3,
The display unit control means for controlling the display of the information on the display unit includes a display unit control means included in the IC card provided with the display unit. The problem can be solved by providing the method of displaying an IC card according to any one of (2) and (3).
[0011]
In the invention according to claim 4,
3. The display unit control unit that controls the display of the information on the display unit includes a display unit control unit outside the IC card provided with the display unit. The problem can be solved by providing the method of displaying an IC card according to any of the above.
[0012]
A typical example in which the display unit control unit is provided is a display unit control unit provided in an IC card data reading / writing device. In the case of a contact type IC card, control is performed via a terminal. Control via antenna.
[0013]
In the invention according to claim 5,
2. The information display device according to claim 1, wherein the display unit uses a non-volatile information display technique that continues to display the information even after the energy required for writing the information for displaying the information is exhausted. The problem can be solved by providing the method for displaying an IC card according to any one of (1) to (4).
[0014]
In the invention according to claim 6,
The display unit performs a display using a microcapsule electrophoresis method, and the display method can be solved by providing the display method of an IC card according to any one of claims 1 to 5.
[0015]
When the energy to be used is electric energy, if the IC card is an IC card with a built-in battery or an IC card with a solar cell, power may be supplied from the battery.
[0016]
On the other hand, in the case of an IC card not having such a battery, for example, if it is a contact type IC card, an antenna from the outside via a contact terminal of an IC chip, or if it is a non-contact type IC card, an antenna Alternatively, power may be supplied from the outside via a coil.
[0017]
Alternatively, if the energy used for display is heat energy, heat may be supplied from an external writing unit.
[0018]
In the invention according to claim 7,
An IC card having a display unit for displaying information,
The display unit is
At least one of information that can be used when the owner of the IC card identifies the application installed on the IC card, or information that can be referred to when using the application installed on the IC card. That information is displayed using at least one of letters, numbers, symbols, or graphics;
The problem can be solved by providing an IC card characterized by the following.
[0019]
In the invention according to claim 8,
When two or more of the applications are installed on one of the IC cards, displaying at least one of the information on each of the two or more of the applications on the display unit;
The problem can be solved by providing the IC card according to the seventh aspect.
[0020]
In the invention according to claim 9,
Display unit control means for controlling the display of the information on the display unit is provided in the IC card provided with the display unit;
The problem can be solved by providing the IC card according to any one of claims 7 and 8.
[0021]
In the invention according to claim 10,
Display unit control means for controlling the display of the information on the display unit is not provided in the IC card provided with the display unit;
The problem can be solved by providing the IC card according to any one of claims 7 and 8.
[0022]
In the invention according to claim 11,
The display unit uses a non-volatile information display technology, which continues to display the information even after the energy required for writing the information for displaying the information is exhausted,
The problem can be solved by providing the IC card according to any one of claims 7 to 10.
[0023]
In the invention according to claim 12,
The problem can be solved by providing the IC card according to any one of claims 7 to 11, wherein the display unit performs display using a microcapsule type electrophoresis method.
[0024]
In the invention according to claim 13,
An IC card according to any one of claims 7 to 12, and
A display unit control unit that is outside the IC card and controls the display unit to display the information;
The problem can be solved by providing an IC card display system characterized by the following.
[0025]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
[0026]
(1) Basic Configuration of Card FIG. 1 is a block diagram showing the configuration of the IC card of this embodiment.
[0027]
The IC card according to the present embodiment is an IC card including at least a microcomputer and a memory. A CPU 4 (microcomputer) having a ROM 2 and a RAM 3 in a card body 1, a memory 5 for storing information, and a CPU 4 or a memory 5 are provided. It has a display 6 for displaying contents, a driver 7 for driving the display, and a connection terminal 8 for external connection.
[0028]
For the IC card, a power supply voltage (Vpp, Vcc) and a ground voltage (GND) are supplied to a connection terminal 8 for external connection (in the case of a non-contact type IC card, power is supplied through an antenna described later). ), A reset signal (RST), an input signal (I / O), and a clock signal (CLK) are input / output as control signals, and supplied to the CPU 4, the memory 5, the display 6, and the driver 7 as necessary. .
[0029]
Further, inside the IC card, the CPU 4 and the memory 5 are connected through a control bus, and under the control of the CPU 4, desired data is stored at a predetermined address of the memory 5, and the data stored in the memory 5 and the data of the CPU 4 are stored. The contents can be displayed on the display 6 under the control of the driver 7 by supplying power from the outside.
[0030]
The IC card 1 configured as described above has an overview as shown in FIG. 2, for example. The CPU 4, the memory 5, and the driver 7 are arranged as an IC module 9 and arranged at the center on the left side of the figure. On the right side, the display area is divided into a plurality of display areas 6a, 6b, 6c.
[0031]
In this case, information that can be used to identify an application installed in the IC card, information that can be referred to when using an application installed in the IC card, and the like are displayed in a display area corresponding to each application. .
[0032]
Also, the display 6 forms one image area as shown in FIG. 11, and is divided into a plurality of display areas 6m, 6n, 6p and 6q at the time of display as shown in FIG. Information that can be used in such a case, information that can be referred to when using an application installed in an IC card, and the like can be displayed corresponding to a plurality of applications.
[0033]
Note that a magnetic stripe or an embossed character area can be provided as necessary. In this case, specific information of the IC card owner is stored in the magnetic stripe, and a user's name, card number, and the like are imprinted in the embossed character area by embossing.
[0034]
The dimensions of the IC card 1 conform to the ISO standard, and can be used similarly to a conventional IC card.
[0035]
The IC card 1 is used as an auxiliary recording medium that can be inserted into and removed from various information processing devices. As shown in FIG. 3, a reader / writer 22 having an IC card slot 21 and a computer 23 connected to the reader / writer 22 input and output information. Is what you do.
[0036]
After the image is displayed on the display 6 by the display control program, it is necessary to continuously supply power from the outside to continuously perform the display. However, when an electrophoretic display as described later is employed, Since the image has a memory effect, the image can be continuously displayed on the display 6 even when the power supply is stopped.
[0037]
(2) Application to Contact Type and Non-Contact Type Cards IC cards are broadly classified into contact type and non-contact type according to data reading and writing methods. Here, the contact type refers to a method of transmitting a data signal by bringing a probe or the like into contact with an external connection terminal provided on the surface of the IC card. On the other hand, the non-contact type refers to a method of exchanging wireless signals with an antenna embedded in the IC card 1. The IC card 1 of the present invention can employ either method.
[0038]
As shown in FIG. 4, in the case of a contact type IC card, power supply to the IC card 1 is performed via a connection terminal 31 from an external reader / writer or the like. On the other hand, in the case of a non-contact type IC card as shown in FIG. 5, data is supplied from an external antenna 32 to a coil antenna 33 in the IC card 1 together with data. The data is demodulated by the RF circuit 34 and displayed on the display 6 through the driver 7 as necessary. Thus, the data in the IC card 1 can be displayed on the display 6 without using an external device.
[0039]
(3) Method of manufacturing a card As a method of manufacturing a non-contact type IC card, for example, a method of wrapping an IC unit into a card shape by an injection molding method using a thermoplastic resin, and performing injection molding or cutting. To form the first and second resin plates provided with IC unit mounting locations, and to mount the IC unit therein, and then bond and integrate the first and second resin plates. is there.
[0040]
In the latter method, either the thermoplastic resin or the thermosetting resin may be used for the first and second resin plates.
[0041]
As the thermoplastic resin, vinyl chloride resin, polystyrene resin, ABS resin (acrylonitrile butadiene styrene copolymer resin), SAN resin (acrylonitrile styrene copolymer resin), acrylic resin, polysulfone resin, polycarbonate resin, polyethylene resin, polypropylene resin, Examples include polyamide resin, polyacetal resin, fluorine resin, polyester resin, and the like.
[0042]
Examples of the thermosetting resin include a phenol resin, a urea resin, a melamine resin, a polyester resin, an epoxy resin, a polyethane resin, a xylene resin, and a silicone resin.
[0043]
A recess for mounting an IC unit (IC module) is formed in at least one of the first and second resin plates, and the IC unit is mounted in the recess.
[0044]
Next, the mating surfaces of the first and second resin plates are bonded and integrated to form a non-contact IC card as a product.
[0045]
(4) Configuration 1 of display unit
As the display unit, a display unit which can maintain flexibility and has sufficient contrast even without a backlight can be suitably used. It consists of a flexible thin substrate on which electroluminescent material, polymer dispersed liquid crystal (PDLC), polymer stable liquid crystal, smectic liquid crystal, ferroelectric liquid crystal, and display using microcapsule electrophoresis are used. It can be realized by combining them. In particular, when a display body using a microcapsule electrophoresis method is used, an image close to a conventional paper can be displayed.
[0046]
(5) Display unit configuration 2
A case in which a film type microcapsule type electrophoretic display 11 is used as the display 6 will be described in detail.
[0047]
FIG. 6 shows a sectional view of the display 11. An electrode film 11d, an image display layer 11c, an electrode film 11b, and a surface protection layer 11a for protecting the display portion are laminated on a flexible base material 11e such as paper or plastic. Note that the surface protection layer 11a can be omitted.
[0048]
The electrode film 11b is a film in which electrodes are formed on a transparent plastic film having excellent dimensional stability such as polyethylene terephthalate (PET), polyethylene naphthalate (PEN), and polyimide. The electrode film 11d is also formed by forming electrodes of the same base material, but is not necessarily required to be transparent.
[0049]
The type of electrode can be selected arbitrarily. However, when the following microcapsule type electrophoresis method is used, the electrode film 11b is a common electrode that applies the same potential to the entire surface, and the electrode film 11d is an active electrode. Electrodes such as a matrix electrode and a segment electrode can be employed.
[0050]
The configuration when the image display layer 11c is used in a microcapsule electrophoresis system will be described.
[0051]
One example of the microcapsule 110 is shown in FIG. The microcapsule 110 has a capsule shell 111 made of methacrylic acid resin, urea resin, gum arabic, or the like, and contains therein white particles 113 made of titanium oxide and black particles 114 made of carbon black having high viscosity such as silicone oil. It is dispersed and enclosed in a dispersion medium 112. The white particles, titanium oxide, are positively charged, while the black particles, carbon black, are negatively charged.
[0052]
Therefore, as shown in FIG. 8B, when an electric field is applied to the two electrode films 11b and 11d, and the electrode film 11b becomes a negative electrode and the electrode film 11d becomes a positive electrode, positively charged white particles are formed. Since 113 is drawn toward the electrode film 11b and the black particles 114 are drawn toward the electrode film 11d, at least the electrode film 11b is set as a transparent electrode, and when viewed from above the electrode film 11b, the portion looks white.
[0053]
Conversely, when the electrode film 11b is a positive electrode and the electrode film 11d is a negative electrode, the positively charged white particles 113 are drawn toward the electrode film 11d and the black particles 114 are drawn toward the electrode film 11b. When observed from above the film 11b, the portion looks black.
[0054]
The image display layer 11c has many such microcapsules 110. By controlling the electric field of each address electrode of the electrode films 11b and 11d, the character "A" in FIG. As displayed, a desired character or figure can be displayed with white and black pixels.
[0055]
In the above example, the microcapsule is a monochrome (black and white) display containing two types of black and white particles. However, by adjusting the position of the particles in multiple steps by applying a potential, the half-tone is displayed. It is also possible to perform display, display a color by containing particles of different colors, or include two or more types of particles.
[0056]
Although the above-mentioned microcapsules contain two kinds of black and white particles, monochrome (black and white) display can be realized by using one kind of particles and coloring the dispersion medium black.
[0057]
That is, as shown in FIG. 9, an electric field is applied to the two electrode films 11 b and 11 d by using a microcapsule in which titanium oxide as white particles is positively charged and dispersed in a dispersion medium 115 colored black. When the electrode film 11b becomes a negative electrode and the electrode film 11d becomes a positive electrode, the positively charged white particles 113 are drawn toward the electrode film 11b, and the black dispersion medium 115 is inevitably formed on the electrode film 11d. When viewed from above the electrode film 11b side, the portion looks white. Conversely, when the electrode film 11b becomes the positive electrode and the electrode film 11d becomes the negative electrode, the positively charged white particles 113 are pulled toward the electrode film 11d, and the dispersion medium 115 colored black is inevitably formed on the electrode film 11b. Side, the portion looks black when viewed from above the electrode film 11b side.
[0058]
When the microcapsules are driven by the active matrix driving method, the electrode film 11d is independently patterned for each pixel as a pixel electrode, and a thin film transistor, a signal electrode, and a scanning electrode (not shown) are provided side by side. A transparent common electrode is formed uniformly on the substrate. In this case, when the electrode film 11b is used as a common electrode, the entire surface has the same potential (for example, the potential is set to zero). Therefore, by controlling the electric field of each address electrode on the electrode film 11d side (by giving a positive or negative potential). The desired image can be displayed by moving the particles in the microcapsule at the electrode position based on the above principle.
[0059]
Similarly, a desired image may be displayed by moving the particles in the microcapsule at the electrode position by controlling the electric field of each address electrode on the electrode film 11b side by using the electrode film 11d as a common electrode. Good.
[0060]
In the case of time-division driving, the electrode films 11b and 11d are composed of transparent electrodes made of a transparent conductor such as ITO (Indium Tin Oxide), which are linear at right angles to each other. Form.
[0061]
Of course, the driving method is not limited to the above-described method, and an optimum method may be selected according to the application.
[0062]
Various diameters of the microcapsules can be adopted, but if the diameter is about 40 μm to about 100 μm, sufficient resolution and responsiveness can be obtained. The resolution of the displayed image mainly depends on the arrangement (resolution) of the electrodes in the electrode film. However, if the diameter of the microcapsules is small, the moving speed of the microcapsules in the dispersion medium is increased, and as a result, the response at the time of display is reduced. There is a merit that it is excellent (high response speed).
[0063]
The above example is an example of displaying a monochrome (black and white) image. However, in the case of displaying a color image, R (red), G (green), and B (blue) divided in pixel units as shown in FIG. This can be realized by providing the color filter 11f having the color of (1) on the transparent electrode film 11b side to which an electric field can be applied in pixel units.
[0064]
That is, the observation light in the portion where the white particles are drawn to the electrode film 11b side is reflected by the white particles and passes through the color filter, so that the color of the color filter is observed.
[0065]
In the example of FIG. 10, the R pixel portion and the G pixel portion of the color filter have white particles drawn on the transparent electrode side of the electrode film 11b, so that R light and G light are observed, and the B pixel portion of the color filter is black. Since the particles are attracted to the transparent electrode side of the electrode film 11b, the observation light is absorbed and the B light is not observed. As described above, a color image can be displayed by controlling the R, G, and B lights observed in pixel units. Although the electrode 11d is a common electrode in FIG. 10, the electrode 11b may be a common electrode.
[0066]
The paper-shaped electronic display is made of a flexible material, and the patterning of electrodes and the like can be formed on a plastic film by a printing method or a vapor deposition method. As for the display screen size, any size can be created according to the application and demand. Further, since it is manufactured using a film, it is a light display medium without bulk and can be suitably used as the display medium of the present invention.
[0067]
In the image display layer 11c, there is no problem in display even if the position and arrangement of the microcapsules 110 slightly vary. Therefore, it is possible to use it by bending it or attaching it to a curved surface.
[0068]
In this respect, for example, a liquid crystal display (LCD) requires a glass plate, a polarizing plate, a retardation film (film), etc. for maintaining strength other than the image display layer. In the case of an electronic display, only an electrode composed of an image display layer and a film is sufficient, so that a very thin and light display can be obtained.
[0069]
Each particle is dispersed in a highly viscous dispersion medium, and once the electric field is applied, the position of the particle does not change even if the power is turned off. As described above, since the display image is non-volatile (memory property) so that the display image is not erased even when the power of the display is turned off, an electric field only needs to be applied at the time of initial display or rewriting, which is necessary for display as compared with a normal display device. Less power is required, and significant power savings are possible.
[0070]
Further, in the display 11, even if the position and arrangement of the microcapsules 110 are slightly varied, there is no problem in displaying. Therefore, by using a material that makes the entire display 11 thin and flexible, including the electrode sheets 11b and 11d, it is possible to provide paper-like flexibility.
[0071]
Further, since the carbon black of the black particles 114 is the same material as the ink used for normal printing, it is possible to perform a natural display that is extremely close to a printed matter of paper.
[0072]
The display medium itself in the liquid crystal display device is thin, about 5 μm, whereas the electrophoretic display is currently several tens of μm (about 40 μm to 70 μm) thick. However, the thickness of the glass as a protective layer for protecting the display medium is 500 or 300 μm even if it is thin, and since it is used as a pair, the thickness becomes quite large. Further, a polarizing plate and a retardation plate (film) are required, and these also have a thickness of about 200 μm to 300 μm. Further, since an electrode such as a TFT is required, a considerable thickness including these layers is required to obtain optical characteristics in a liquid crystal display device. Therefore, it is difficult to create an IC card that meets the ISO standard.
[0073]
On the other hand, in the case of an electrophoretic display, a protective layer such as glass is not required, and since the whole is formed into a film, the thickness can be easily reduced to 1 mm or less. Can be.
[0074]
(6) The operation of this embodiment, such as display control, will be described. The power of the IC card 1 is supplied from an external IC card reader / writer, and a display on the display 6 is performed by the supply of the power. The display on the display 6 is performed through the driver 7 by a display control program, and is displayed on the display 6 before the data in the CPU 4 or the memory 5 is transmitted to another external device, for example, a personal computer or an OA device.
[0075]
The display 6 has various uses. For example, the IC card 1 is capable of storing a larger amount of data than a conventional magnetic card or the like, but it is assumed that the number of IC cards owned by an individual will increase with the diversification of applications. You. In such a case, it is conceivable to display index information indicating the information content of the IC card and use it instead of the index. This solves the problem of changing the setting contents by only a specific person and confirming the setting contents as in the related art, and allows the user to easily check the contents of the IC card 1. This can also prevent mistakes such as sending erroneous data to a computer or OA equipment.
[0076]
Since the IC card 1 of the present embodiment employs a non-volatile microcapsule electrophoretic display as the display 6, the display image remains as it is even when power is not supplied. Therefore, the display can be visually confirmed even when the IC card 1 is separated from the reader / writer or the like. In addition, since power needs to be supplied only when data is rewritten on the display 6, power consumption can be reduced. In addition, the display device can be lighter and thinner than conventional display devices, so that it is easy to carry, and since it has flexibility, it has durability against bending and can be handled like a normal IC card. .
[0077]
The display on the display 6 can be displayed and rewritten by applying an electric field for controlling the particles in the microcapsule from outside, in addition to the internal processing.
[0078]
(7) Usage At the time of issuing a card, a display control program for performing display control is inserted. This display control program controls the display mechanism of the display inside the card, and has an application programming interface (hereinafter abbreviated as API) that can be used by other applications installed on the IC card.
[0079]
The application developer of the IC card can use the display control function of the card surface by creating an application according to the API. An application using this function may be installed in advance at the time of issuing a card, or may be installed after issuing a card.
[0080]
As shown in FIG. 13, after the card is issued, after the card is issued, by inserting or holding the card in a card reader / writer, the application is installed, the application is executed, and sometimes both, as necessary. As a result, the data inside the card is changed, the display data is rewritten, and finally the card is removed from the cart reader / writer. Here, the card user may confirm the display information and insert or hold it again in the card reader / writer as necessary.
[0081]
When the application is installed by the IC card reader / writer as described above, the IC card OS operates each application through the API as shown in FIG. In the case of an application that requires partial display, a display control program operates by this API, and is displayed via a display driver.
[0082]
When the application is installed on the card, the display control program performs processing for securing a display area on the card requested by the application. If the display area cannot be secured, the entire application installation is failed, or the application is installed with only the display function disabled.
[0083]
The display content on the display on the card is changed by, for example, a display control program using power supplied to the IC chip when the card is used. In this case, the card reader / writer does not need a printing function, and can be used even with a non-contact IC card.
[0084]
For example, as shown in FIG. 15, power is supplied to an IC card by an IC card reader / writer, an application start command is transmitted by application protocol data unit (APDU) communication, and an application is executed in the IC card. , A display instruction is issued. In response to this display command, the driver program of the display control program is started using the API, and power is supplied to the circuit by the display driver, and the display content is changed.
[0085]
When the display content is changed, the display content change processing of the display control program is ended, an application execution end response is generated, and APDU communication is performed with the IC card reader / writer.
[0086]
When the application execution end response is received by the IC card reader / writer, the power supply is terminated. Even if the power supply is terminated in this way, the display according to this example is nonvolatile, and the changed display is maintained.
[0087]
(8) Specific Usage Example Hereinafter, a specific usage method will be described with reference to FIG.
[0088]
First, it is assumed that the multi-application IC card 1 including the display function of the display and the display control program is manufactured 51 by the card manufacturer 41.
[0089]
A credit card application creator creates a point display program using a display control function in advance in a credit card application that holds a point value in the card.
[0090]
The credit card company or card user installs 52 this application on the card and executes it.
[0091]
As a result, the points are displayed 46 on the surface of the IC card 1 and lent to the card user 43 from the credit company 42.
[0092]
When the card user 43 performs shopping using the IC card 1 and passes the card through the card reader / writer 22 at the time of payment, the points displayed on the card surface are based on the value of the new points in the IC card 1. Rewritten. The value of this point does not necessarily need to use the information inside the IC card 1, and the value obtained as a result of communicating with the server application of the credit card company 42 is transmitted from the card reader / writer 22 to the IC card 1, May be used. Thus, the user can always check the current point value with the IC card 1 alone.
[0093]
At this time, the card reader / writer 42 used in a store or the like only needs to have a general function (power supply and issuance of an application operation command) for using an application on the IC card 1, and a printing function is provided. do not need.
[0094]
【The invention's effect】
According to the present invention, the information inside the IC card can be confirmed by the card alone.
[0095]
In addition, by using electronic paper as a display method, a card reader / writer does not need a printing function when information is rewritten.
[0096]
Furthermore, the display content can be controlled from the installed application inside the card. Therefore, there is no need to determine the display content when issuing the card, and the card can be issued as a multi-purpose multi-application IC card with a display function.
[0097]
Finally, the communication mode of the card can correspond to both contact and non-contact.
[Brief description of the drawings]
FIG. 1 is a functional block diagram illustrating a configuration of an IC card according to an embodiment of the present invention.
FIG. 2 is an explanatory diagram illustrating an appearance (display surface side) of an IC card according to an embodiment of the present invention.
FIG. 3 is an explanatory diagram illustrating an IC card system according to an embodiment of the present invention.
FIG. 4 is an explanatory diagram of a contact type IC card according to an embodiment of the present invention.
FIG. 5 is an explanatory diagram of a non-contact type IC card according to an embodiment of the present invention.
FIG. 6 is an explanatory diagram showing a display according to an embodiment of the present invention.
FIG. 7 is an explanatory view showing a microcapsule according to an embodiment of the present invention.
FIG. 8 is an explanatory diagram showing an operation of the display according to the embodiment of the present invention.
FIG. 9 is an explanatory diagram showing an operation of the display according to the embodiment of the present invention.
FIG. 10 is an explanatory diagram showing an operation of the display according to the embodiment of the present invention.
FIG. 11 is an explanatory diagram showing an appearance (display surface side) of an IC card according to another embodiment of the present invention, which is different from FIG. 2;
FIG. 12 is an explanatory diagram showing the appearance (display surface side) of the display state of the IC card in the embodiment of FIG. 11;
FIG. 13 is an explanatory diagram showing an operation of the IC card according to the embodiment of the present invention.
FIG. 14 is an explanatory diagram showing a driving state of the IC card according to the embodiment of the present invention.
FIG. 15 is an explanatory diagram of display content changing processing from power supply to termination of power supply of the IC card according to the embodiment of the present invention.
FIG. 16 is an explanatory diagram of a method of using an IC card when the IC card is used for a credit card in one embodiment according to an embodiment of the present invention.
[Explanation of symbols]
1 ... IC card 2 ... ROM
3 ... RAM
4 CPU
5 Display 6 Display 6a, 6b, 6c, 6m, 6n, 6p, 6q Display area 7 Driver 8 Connection terminal 9 IC module 10a Magnetic stripe 10b Embossed character area 21 IC card slot 22 Reader / writer 23 Computer 31 Connection terminal 32 External antenna 33 Coil antenna 34 RF circuit 41 Card manufacturer 42 Credit card company 43 Card user 44 Store 46 Display 51 Manufacturing 52 Installation 11 Display 11b Electrode film 11c Image display layer 11d Electrode film 11f Color filter 110 Microcapsule 111 … Capsule shell 112… Dispersion medium 113… White particles 114… Black particles 115… Dispersion medium

Claims (13)

A method of displaying an IC card having a display unit for displaying information,
At least one of information that can be used when the owner of the IC card identifies the application installed on the IC card, or information that can be referred to when using the application installed on the IC card. And displaying the information on the display unit using at least one of a character, a number, a symbol, and a graphic. 2. The method according to claim 1, wherein when two or more applications are installed on one of the IC cards, at least one of the information on each of the two or more applications is displayed side by side on the display unit. The display method of the IC card described in 1. The display unit control means for controlling the display of the information on the display unit includes a display unit control means included in the IC card provided with the display unit. 2. The method for displaying an IC card according to any one of 2. 3. The display unit control unit that controls the display of the information on the display unit includes a display unit control unit outside the IC card provided with the display unit. The method of displaying an IC card according to any one of the above. 2. The information display device according to claim 1, wherein the display unit uses a non-volatile information display technology that continues to display the information even after the energy required for writing the information for displaying the information is exhausted. 5. The method for displaying an IC card according to any one of claims 1 to 4. The IC card display method according to claim 1, wherein the display unit performs display using a microcapsule electrophoresis method. An IC card having a display unit for displaying information,
The display unit is
At least one of information that can be used when the owner of the IC card identifies the application installed on the IC card, or information that can be referred to when using the application installed on the IC card. Or display the information using at least one of letters, numbers, symbols, or graphics;
An IC card characterized by the above-mentioned. When two or more of the applications are installed on one of the IC cards, displaying at least one of the information on each of the two or more of the applications on the display unit;
The IC card according to claim 7, wherein: Display unit control means for controlling the display of the information on the display unit is provided in the IC card provided with the display unit;
The IC card according to claim 7, wherein: Display unit control means for controlling the display of the information on the display unit is not provided in the IC card provided with the display unit;
The IC card according to claim 7, wherein: The display unit uses a non-volatile information display technology, which continues to display the information even after the energy required for writing the information for displaying the information is exhausted,
The IC card according to any one of claims 7 to 10, wherein: The IC card according to claim 7, wherein the display unit performs display using a microcapsule electrophoresis method. An IC card according to any one of claims 7 to 12, and
A display unit control unit that is outside the IC card and controls the display unit to display the information;
A display system for an IC card, comprising:

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