JP2004265176A - Ic card and its information display method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method which independently holds a power supply for operating functions to be added other than those defined in the standard specification of IC cards, and realizes the extension of functions to be added to IC cards, its expandability, versatility and stability without interrupting an operation of the function defined in the standard specification. <P>SOLUTION: The IC card having an IC chip provided, in the card substrate, with a memory and a processor which performs operation processing and a non-contact or contact type communication interface electrically connected with the IC chip, wherein the data input/output of the processor to the external and the supply of an operating power thereto are conducted via the communication interface, comprises a display device connected to a port in the processor and controlled by the processor and a coil or antenna for supplying an operating power of the display device, thereby independently holding the power supply for operating functions to be added when added to structures other than those defined in the standard specification of the IC card. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an IC chip including a memory and a processor for performing control and arithmetic processing, and an IC card (portable recording medium) having a communication interface electrically connected to the IC chip. A power supply source for a hybrid type IC card, especially when stable power supply is required separately from the power supply to the IC chip, for example, when a configuration other than the function specified in the ISO standard of the IC card is added. The present invention relates to an IC card having a configuration usable as an IC card.
[0002]
[Prior art]
An IC card incorporates a thin IC chip (semiconductor integrated circuit) in a thin plastic material, and the IC chip has a program for performing predetermined information processing. The IC chip can record and read information. It is a general term for a credit card-sized card. Depending on the interface means, each method of "contact IC card" (IC card with external terminal) and "non-contact IC card" (IC card without external terminal), or It is classified into an IC card combining the two methods (generally called a composite IC card, a hybrid IC card, a combination IC card, or a dual interface card).
[0003]
The contact IC card is provided with electrical contacts (terminals) electrically connected to the IC chip on the IC card, connected to an external terminal via the contact, and performs communication with the external terminal. Further, the non-contact IC card has a built-in coil or antenna electrically connected to the IC chip, and the data, clock signal and power mounted on the carrier wave, which is a weak radio wave, are extracted from the carrier wave and the built-in IC chip is removed. Activate and communicate with external terminals. Equipped with an interface means that supports both "contact" and "non-contact" types, depending on the environment in which the IC card is used by the card operator, either "contact type" or "non-contact type" Can be selected.
[0004]
In addition, since an IC card is a computer using an IC chip, it can realize high security using electronic technology and software technology, and can provide an information carrier in an advanced information society or an access key to information. Use as ID is expanding.
[0005]
The background of the spread of the information society along with the progress of the information society is based on ISO (International Organization for Standardization) and JIS (JAPANESE Industrial Standards; Japanese Industrial Standards) standards (physical properties, structures and protocols). , Interfaces, commands, etc.) have been standardized. For example, contact IC cards include ISO / IEC7816-1 / 2/3/4/4/5/6/8/9, JIS X6303, 6304, 6306, 6307, 6308, 6300-8 / 9, and non-contact IC cards. There are ISO / IEC10536-1 / 2/3, 14443-1 / 2/3/4, and 15693-1 / 2/3, and even now, at the international conference, the A proposal is being discussed and new standards will be added.
In addition, the current IC card is also used in combination with a magnetic stripe card or an ID card, and has compatibility with a conventionally used medium.
[0006]
Further, a configuration not defined by the standard may be provided in the IC card, and for example, it has been considered to visually display a part of information held in the IC card. In electronic money applications, balances and transaction records, or in the case of shopping point cards, in order to appropriately notify customers of transaction information such as the number of points, reversible thermosensitive recording method, microcapsule magnetic particle electrophoresis display method, microcapsule particle electrophoresis method, A display means using a liquid crystal display method or the like is incorporated in an IC card and provided, and information is rewritten and displayed for each transaction. In other cases, the information is displayed on the monitor of the IC card terminal or POS terminal at the time of the transaction, or printed on the transaction receipt.
[0007]
However, in the past, when an IC card was used, it was not possible to notify the IC card user that the IC card was operating in conjunction with the communication performed with the terminal device of the IC card. However, if any, the terminal side turned on the access lamp and the processing status was displayed on the monitor. In particular, since the processing is performed in a non-contact state such as a non-contact IC card, there is no means for the IC card user to know the processing state from the IC card. Accordingly, the present applicant has disclosed in Japanese Patent Application No. 2002-254279 that the information of an IC card can be displayed in real time by controlling display means such as a light emitting diode (LED) and a liquid crystal (LCD) according to the operation of the IC card. An invention for displaying information is presented.
[0008]
[Patent Document 1] JP-A-8-187981
[0009]
[Patent Document 2] Japanese Patent Application Laid-Open No. 8-227747
[0010]
[Patent Document 3] JP-A-9-1968
[0011]
[Patent Document 4] JP-A-9-73524
[0012]
[Problems to be solved by the invention]
However, as described above, functions to be added in addition to those defined in the standard, for example, the above-mentioned display means may not operate, or other functions of the IC card may be affected or may not operate. If that is a problem. As described in the prior art documents (Patent Documents 1 to 4), in a non-contact IC card, when an attempt is made to supply driving power from one coil or antenna, power or resistance for operating two or more functions, The coil or antenna had to be designed by calculating the capacitance of the capacitor, and the resonance frequency of the coil or antenna had to be tuned further from the variation in the parts generated during the manufacture of the IC card.
[0013]
Therefore, the present invention provides a power supply for independently operating a function to be added to the IC card other than that specified in the standard, and adds the power to the IC card without obstructing the operation of the function specified in the standard. The present invention provides a method for realizing the expansion of functions to be performed, that is, its expandability, versatility, and stability.
[0014]
[Means for Solving the Problems]
SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an invention according to claim 1 includes an IC chip having a memory and a processor for performing control and arithmetic processing in a base material; An IC card having a non-contact type or contact type communication interface electrically connected to the processor, and performing data input / output and operation power supply of the processor to / from the outside through the communication interface, And an operating power supply coil or antenna for the display device, the display device being connected to a port of the display device and controlled by a processor.
[0015]
According to a second aspect of the present invention, in the IC card according to the first aspect, the display device is a light emitting diode.
[0016]
According to a third aspect of the present invention, in the IC card according to the first aspect, the display device is a liquid crystal display device.
[0017]
According to a fourth aspect of the present invention, in the IC card according to the first aspect, the display device is a device for infrared communication, and transmits data to the outside under the control of the processor.
[0018]
According to a fifth aspect of the present invention, in the IC card according to the first aspect, a plurality of operating power supply coils or antennas are arranged corresponding to a plurality of display devices.
[0019]
The invention according to claim 6 is the IC card according to claim 1, wherein the communication interface is a coil or an antenna.
[0020]
According to a seventh aspect of the present invention, in the IC card according to the fifth aspect, the coil or antenna serving as a communication interface and the operating power supply coil or antenna are arranged so that at least a part thereof overlaps in a plane direction of the IC card. Characterized by being done
[0021]
According to an eighth aspect of the present invention, in the IC card according to the fifth aspect, the coil or antenna serving as a communication interface and the operating power supply coil or antenna are arranged so as not to overlap in a plane direction of the IC card. It is characterized by the following.
[0022]
According to a ninth aspect of the present invention, there is provided an IC chip including a memory and a processor for performing control and arithmetic processing, a communication interface for externally supplying data input / output and operating power of the processor, and a port in the processor, And an information display method of an IC card including a display device controlled by the processor and an operation power supply coil or antenna of the display device, wherein a numerical value of data obtained as a result of arithmetic processing of the processor, or An information display method for an IC card, characterized in that information of a numerical value of data recorded in a memory is displayed on a display device based on a preset display method.
[0023]
According to a tenth aspect of the present invention, in the information display method for an IC card according to the ninth aspect, the display method in the display device is lighting or blinking of a light emitting diode.
[0024]
According to an eleventh aspect of the present invention, in the information display method for an IC card according to the ninth aspect, the blinking speed is controlled by operating the transmission frequency.
[0025]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to FIGS. 1A to 1C are external views of an IC card according to an embodiment of the present invention, and FIGS. 2A and 2B are diagrams of an IC card according to another embodiment to which the present invention can be applied. The external view is shown.
[0026]
The type of IC card may be any of a contact IC card, a non-contact IC card, and an IC card combining the two methods, and is appropriately selected according to the application. In the present specification, when no distinction is made between any of the methods, they are collectively referred to as an IC card or an IC card 1.
[0027]
The contact IC card 2 has a small processor (arithmetic processing unit) and a contact interface on a plastic base material such as vinyl chloride (PVC) resin or polyethylene terephthalate (PET) resin, and further has a memory (electrically erasable and writable). A contact type IC module having an EEPROM as a data memory) is built in, and communication and driving power of the contact IC card 2 are supplied through the contact interface 9.
[0028]
The configuration of this processor includes a nonvolatile memory (a mask ROM as a program memory for driving the CPU, etc.) as a memory and a volatile memory (a writable memory for temporarily storing input / output data and operation data, And a central processing unit (CPU) comprising a control unit and an operation unit.
[0029]
The non-contact IC card 3 is connected to a non-contact interface 10 having a coil and an LC oscillation circuit (coil / capacitor circuit) instead of the contact interface of the contact IC card 2, and usually transmits electromagnetic waves and radio waves to the IC card terminal 7. A command, data, and a clock signal are loaded as a carrier, and power is extracted from the carrier to supply communication and drive power for the IC card. The contact IC card 2 differs from the contact IC card 2 in that a non-contact interface 10 is connected thereto, but the other components such as a processor are substantially the same.
[0030]
The contact IC card 2 shown in FIG. 1A includes an IC chip 13 including a processor and a memory, an external terminal 9 serving as a contact interface, a light emitting diode 11 (Light Emitting Diode; hereinafter, referred to as an LED) as a display device, and an operation power. It is composed of a supply coil or antenna 15 and wiring for electrically connecting these. The non-contact IC card 3 shown in FIG. 1B includes an IC chip 13 including a processor and a memory, a coil or antenna 10 as a non-contact interface, an LED 11 as a display device, and a coil or antenna for supplying operation power of the display device. 15. It has wiring for electrically connecting them.
[0031]
FIG. 7 is a circuit diagram showing an embodiment of the operating power supply coil or antenna 15 according to the present invention. The display device (LED 11 or LCD 12) is driven by an external pull-up power supply circuit 21 including a coil 22, an LC circuit 23, and a rectifier circuit 24. ), And can be provided in the reader / writer 5 such as the IC card terminal 7. Since the power supply for driving the IC card is provided independently of the power supply, the demand for the operation power of the display device does not affect the operation of the processor of the IC card. It should be noted that the external pull-up power supply circuit 21 can change the form of a coil, an antenna, or the like depending on the frequency band of electromagnetic waves and radio waves used in the IC card, and has a shape suitable for the applied frequency band. be able to. Frequency bands to be used include 125 KHz, 4.9 MHz, 13.56 MHz, 2.45 GHz, and 5.8 GHz, which are generally standardized (or proposed to be standardized) in ISO, but in some cases, ICs are used. A frequency different from the frequency used for communication of the card can be used.
[0032]
The location of the LED 11 may be any location as long as it does not hinder the use of the IC card, and it is sufficient that the LED is easy for the IC card user to see at the time of use, and the IC shown in FIGS. 1A and 1B is used. The front of the card or the side of the IC card is shown in FIG. When the IC card terminal is placed in front of the IC card, the IC card terminal can be viewed from at least a part or whole of the IC card so that the LED emits light when used in the IC card terminal 7. Also, when the IC card is placed on the side of the IC card, it is in a state in which the IC card is temporarily loaded into the IC card terminal 7 when communicating with the IC card terminal 7, and the IC card is inserted through the IC card inlet. The emission of the LED 11 at the end of the card can be seen.
[0033]
Further, as shown in FIG. 2, a liquid crystal display device 12 (hereinafter, referred to as an LCD) is disposed as a display device instead of the LED of FIG. 1, and data obtained as a result of arithmetic processing of a processor is provided. Alternatively, it displays information processed in the data IC chip recorded in the memory, data transmitted from the IC card terminal via the processor, and the like.
[0034]
FIG. 3 is a schematic diagram of an IC card system that can use the IC card of the embodiment of the present invention. An IC card 1 includes an information processing device 6 that operates an IC card such as transmitting a predetermined command or data to the IC card and receiving a response or data from the IC card, and a reader / writer 5 that directly communicates with the IC card. There is an IC card terminal 7. Further, although not described in detail, a host computer device 8 or another computer device is connected above the IC card terminal.
[0035]
In FIG. 3, power, a clock signal, commands, data, and the like for operating the IC card 1 are transmitted from the reader / writer 5 in accordance with an instruction from the information processing device 6. The IC card 1 operates the IC chip 13 with the transmitted power, performs processing based on the command, and transmits the result or data as a response to the reader / writer 5. The IC card according to the present invention has an independent coil or antenna that supplies other additional functions, for example, electric power used as a power supply for a display function in a non-contact manner, that is, by radio waves or electromagnetic waves. Since this coil or antenna is independent, it can be provided on any type of IC card.
[0036]
FIGS. 4A to 4C show schematic circuits of the IC card of the present invention, and are schematic circuit diagrams of a contact IC card, a non-contact IC card, and a hybrid IC card provided with both interface systems. is there. FIG. 4A shows a contact IC card 2, which is provided with an external terminal 9 connected to an IC chip as a contact interface, and a clock terminal (CLK), a data input / output terminal (I / O), and a reset signal terminal (RST), respectively. ), A ground terminal (GND), and a circuit voltage terminal (Vcc). Commands, data, a clock signal, and power are supplied. Responses and data transmission to the IC card terminal 7 via the external terminal 9 are provided. Is done. The IC chip 13 has a port 14 for performing output or input / output, or an I / O port (the port configuration differs depending on the IC chip design / manufacturer, but the port may be a large current port. A port for outputting a signal for controlling the display device), and a signal for controlling the display device is transmitted from the port 14. Further, an LED 11 as a display device is provided, and a coil 15 and a rectifier circuit 16 provided independently of the circuit voltage terminal (Vcc) are connected to the LED 11.
[0037]
FIG. 4B shows a non-contact IC card 3 having at least a generally used electromagnetic induction type coil 10 / LC circuit (not shown) connected to an IC chip as a non-contact interface. , A command, data, and a clock signal transmitted on a carrier, and power from the carrier. Further, a response and data are transmitted to the IC card terminal 7 via the coil 10, but the details are omitted. The IC chip 13 has a port 14 for performing output or input / output or an I / O port (others are omitted), and a signal for controlling the display device is transmitted from this port. Further, an LED 11 as a display device is provided, and a coil 15 and a rectifier circuit 16 provided independently of the circuit voltage terminal (Vcc) are connected to the LED 11.
[0038]
FIG. 4C shows the hybrid IC card 4 having both the contact interface 9 and the non-contact interface 10, and the description of the configuration is omitted. Is appropriately selected and functions.
[0039]
FIGS. 5A to 5C show a display device in which an LCD 12 is arranged in place of the LED 11 in FIG. 4. The display device has display control means (not shown) for controlling the display on the LCD 12. Sent through.
[0040]
FIGS. 6A to 6C show an IC chip 13, a coil 10 for a non-contact interface, a display device (LED 11 or LCD 12) used when the IC card of the present invention is a non-contact IC card 3. It is the schematic of the inlet 17 which shows the wiring 19 electrically connected. FIG. 6A shows a state in which the non-contact interface coil 10 and a part of the operating power supply coil 25 of the LED 11 overlap with each other in the case of the non-contact IC card 3, and FIG. In the parentheses, the non-contact interface coil and the operating power supply coil 15 of the LED 11 are formed concentrically. FIG. 6C shows an arrangement in which an LCD 12 is arranged instead of the LED 11 in FIG.
[0041]
It is preferable that the base material 18 of the inlet 17 has flexibility and strength such as an insulating resin film or ceramic or paper, and has an adhesive property with a plastic resin as an IC card base material. A coil having a shape suitable for the frequency used by the IC card is formed on the base material 18. Here, the number of turns is assumed to be 13.56 MHz. The coil can be formed by a known technique such as a printing method using a conductive ink, an evaporation method, a plating method, and an etching method, and the method is not particularly limited. The wiring 19 for connecting the IC chip, the non-contact interface coil 10, and the display device (LED 11 or LCD 12) is formed by the same method. One end of the coil 10 is connected to an IC chip 13 or a display device (LED 11 or LCD 12) by a bridge 20 so as not to short-circuit with another coil wire. The other ends of the coils 10 are also connected by the bridge 20 so as not to short-circuit with other coil wires. Further, the operating power supply coil 15 is similarly formed on the other side of the base material 18.
It is also possible to form the non-contact interface coil 10 and the operating power supply coil 15 on different base materials, respectively, and to use the base materials laminated on each other.
[0042]
FIGS. 8A to 8D schematically show a processing flow in an operation program of an IC card according to the present invention.
FIG. 8A shows that the non-contact IC card 3 in a usable state in the IC card terminal is on standby, and first performs an anti-collision process (step S001) before the IC card communicates with the IC card terminal 7. Do. This anti-collision processing is presented in ISO / IEC14443-3. As shown in FIG. 8B, a call signal from the IC card terminal 7 is received (step S101), a predetermined process (step S102) is performed, and a card-specific code is transmitted to the IC card terminal 7 (step S103). If the IC card is specified and anti-collision is established (step S104), the flow returns to the card-side main flow.
[0043]
Next, command processing (step S002) is performed, and processing according to the transmitted command is repeated. As shown in FIG. 8C, this command processing flow receives a command (Step S201), performs processing corresponding to the command request (Step S202), and transmits the processing result to the IC card terminal 7 (Step S202). ). Here, in a process of displaying information related to the process (step S203), the information is displayed on the display device (LED 11 or LCD 12) of the IC card.
[0044]
As an example of this command processing, the case of the data read command shown in FIG. The processor checks whether the file name indicates FFh (in this case, FFh) indicating data recorded in the memory (step S301). If it is correct, the current value (data) is read (step S302), and further, the preset set value of the display method is read (step S303). This set value is set to allow or disallow the display of the IC card (step S307), and the display method is set. For example, when the lighting of the LED is set according to the magnitude of the numerical value, the set value is set to be equal to or more than the set value. If the value is less than the predetermined value, the LED is controlled to be turned on and blinking (step S308). Even if the file name is not confirmed in step S301, the existence of the file is confirmed (step S304), and thereafter, the current value (data) is similarly read out (step S305), and further, the preset value of the display method is read out. Then, the display is permitted / not permitted (step S307), and the LED is controlled according to the setting of the display method (step S308).
If the LCD 12 is used instead of the LED 11, the display of the LCD 12 is controlled in step S308.
[0045]
The LED 11 includes an LED that emits white light and an LED that emits colored light such as blue, red, and yellow, and can be selected in consideration of the visual effect of lighting or blinking when displaying data of an IC card.
Further, a plurality of LEDs 11 are provided on the IC card, a plurality of thresholds are set for numerical values of data read from the IC card, and a plurality of LEDs are turned on in accordance with each threshold, thereby making the display finer according to the data. You can also.
[0046]
When the data recorded in the memory of the IC card is numerical data such as the balance or points of the prepaid card, the LED 11 is turned on when the numerical data is larger than a preset numerical value (set value); It can also blink when it is small.
That is, a threshold value for lighting or blinking is registered in the IC card in advance, the data is set as a default value when the IC card is issued, and is rewritten according to the transaction of the IC card holder.
[0047]
In addition, the numerical data is not less than a preset numerical value, and an arbitrary setting is made so that the LED blinks once at, for example, 1000 yen, twice at 2000 yen, and three times at 3000 yen, as a specific set value. It is also possible to know the amount of money in the IC card by changing the number of blinks according to the value and to display the amount information of the prepaid card directly from the display device of the IC card.
[0048]
Next, a usage example of an IC card using such a display device (LED 11 or LCD 12) will be described. The contact IC card reader 25 shown in FIG. 9A and the non-contact IC card reader 26 shown in FIG. 9B do not have a display function such as a liquid crystal display unlike a conventional IC card reader / writer. It can be replaced with a display of lighting or blinking of the LED 11 on the IC card side or a display on the LCD 12.
[0049]
As a result, the contact IC card reader 25 and the non-contact IC card reader 26 are very light and compact, and their prices are low.
[0050]
【The invention's effect】
According to the present invention, an IC chip including a memory in a card base and a processor for performing control and arithmetic processing, and a non-contact or contact communication interface electrically connected to the IC chip are provided. And non-contact type or hybrid type IC card in which data input / output and operation power of the processor are performed via a communication interface with the processor, the port is connected to a port in the processor and controlled by the processor. By providing a display device and a coil or an antenna for operating power supply of the display device, when the IC card has a function to be added to the IC card in addition to the function specified in the standard of the IC card, the function to be added is provided. Since the power supply to be operated is held independently, the operation of the functions specified in the standard is not hindered, and Expanding the function to add, it is possible to its extensibility and versatility, to achieve stability.
[0051]
In addition, a display device operated by an independent power supply, numerical data (balance, points, etc.) in the IC card are provided on the IC card by an LED, for example, a prepaid payable balance or an increase in the number of points, or a health examination. Numerical data such as the presence or absence of a condition within the inspection reference value range can be confirmed by the lighting state such as the number of repeated blinks of the LED, or a combination thereof, and the user of the IC card can identify and determine the display information.
[Brief description of the drawings]
FIGS. 1A to 1C are external views of an IC card according to an embodiment of the present invention.
FIG. 2 is an external view of an IC card according to an embodiment of the present invention in which a liquid crystal display device is arranged as a display device instead of the LEDs of FIGS. 1A and 1B.
FIG. 3 is a schematic diagram of an IC card system that can use the IC card according to the embodiment of the present invention.
4 (a) to 4 (c) show schematic circuits of the IC card of the present invention, and show schematic circuits of a contact IC card, a non-contact IC card, and a hybrid IC card provided with both interface systems. FIG.
5A to 5C are schematic circuit diagrams of an IC card of the present invention in which an LCD is arranged as a display device instead of the LED of FIG. 4;
FIGS. 6 (a) to 6 (c) are an IC chip, a non-contact interface coil, a display device, and wiring for electrically connecting the IC chip, which are used when the IC card of the present invention is a non-contact IC card. It is the schematic of an inlet which shows.
FIG. 7 is a circuit diagram showing an embodiment of an operating power supply coil or antenna according to the present invention.
8 (a) to 8 (d) show an outline of a processing flow in an operation program of a non-contact IC card according to the present invention.
FIG. 9 is an explanatory diagram showing an example in which a display device for an IC card of the present invention is used.
[Explanation of symbols]
1 IC card
2 Contact IC card
3 Non-contact IC card
4 Hybrid IC card
5 Reader / writer
6 Information processing device
7 IC card terminals
8 Host computer device
9 External terminals (contact interface)
10 coils (non-contact interface)
11 Light emitting diode (LED)
12 Liquid crystal display (LCD)
13 IC chip
14 ports
15 coils
16 Rectifier circuit
17 inlet
18 Substrate
19 Wiring
20 bridge
21 External pull-up power supply circuit
22 coils
23 LC circuit
24 Rectifier circuit
25 Contact IC card reader
26 Non-contact IC card reader

Claims (11)

In a base material, an IC chip including a memory and a processor for performing control and arithmetic processing, and a non-contact or contact communication interface electrically connected to the IC chip, wherein the communication interface between the outside and the outside An IC card wherein data input / output of the processor and supply of operating power are performed via
An IC card comprising: a display device connected to a port in the processor and controlled by the processor; and an operation power supply coil or antenna of the display device. The IC card according to claim 1, wherein the display device is a light emitting diode. The IC card according to claim 1, wherein the display device is a liquid crystal display device. The IC card according to claim 1, wherein the display device is a device for infrared communication, and transmits data to the outside under the control of the processor. 2. The IC card according to claim 1, wherein a plurality of the operation power supply coils or the plurality of antennas are arranged corresponding to a plurality of display devices. The IC card according to claim 1, wherein the communication interface is a coil or an antenna. The IC card according to claim 5, wherein a coil or an antenna serving as the communication interface and a coil or an antenna for supplying operation power are arranged so that at least a part thereof overlaps in a plane direction of the IC card. 6. The IC card according to claim 5, wherein the coil or antenna serving as the communication interface and the operating power supply coil or antenna are arranged so as not to overlap in a plane direction of the IC card. An IC chip including a memory and a processor for performing control and arithmetic processing; a communication interface for externally supplying and outputting data to and from the processor and operating power; and a display connected to a port in the processor and controlled by the processor A method for displaying information on an IC card, comprising: a device; and a coil or an antenna for operating power supply of the display device.
An information display method for an IC card, wherein information obtained as a result of arithmetic processing of the processor or data recorded in a memory is displayed on the display device based on a preset display method. 9. The IC card information display method according to claim 8, wherein the display method in the display device is lighting or blinking of a light emitting diode. 11. The information display method for an IC card according to claim 10, wherein the blinking speed is controlled by manipulating the transmission frequency.

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