JPH091968A - Non-contact type ic card and information exchange system using the same - Google Patents

Abstract

PURPOSE: To easily develop a circuit configuration and program by providing a first antenna for obtaining power and second antenna for transmitting and receiving data independently in a non-contact type IC card for transmitting and receiving data by obtaining power from the exterior. CONSTITUTION: This information exchange system using a non-contact type IC card 10 comprises a ticket inspecting unit 20 for transmitting and receiving predetermined data. The card 10 receives a radio wave transmitted from the antenna 2a of the unit 20 at the time of passing the vicinity of the unit 20 by an antenna 2a, and rectifies it by a rectifier 11 to obtain power. The radio wave of using times confirmation request data transmitted from the antenna 2d of the unit 20 is received by an antenna 2b, detected by a detector 13, the data is demodulated by a modulator/demodulator 14, the data such as fee or times is rewritten by a microcomputer, etc., and the result is modulated by the modulator/demodulator 14, and transmitted from the antenna 2b to the unit 20.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a non-contact type IC card, and more particularly to a structure of a non-contact type IC card and an information exchange system using the same.

[0002]

2. Description of the Related Art In recent years, as a ticket card for ski lifts, a ticket for commuter tickets such as trains and buses, a commuter pass card, a stock management tag, etc., the card can be taken out at any time to read the ticket gate. A non-contact type IC card (also referred to as a high-frequency tag: hereinafter abbreviated as an IC card) that can confirm and update the data of the card even if it is not passed through is used.

This type of IC card has a structure as shown in FIG. That is, as shown in a perspective view seen from the top in FIG. 2A and a perspective view seen from the side in FIG. 2B, a fixed resin such as a plastic resin having a thickness of about 0.5 mm to 2.0 mm. A substrate 1 on which a semiconductor device and individual electronic components are preliminarily mounted and an antenna 2 made of a coiled copper wire or the like are fixed in the interior of the fixing resin 4, and the surface of the fixing resin 4 has a thickness of 0. Film 3 with a predetermined mark made of polyethylene terephthalate (PET) of about 1 mm in advance
Is affixed. A wiring pattern is printed and formed on the substrate 1 in advance, semiconductor devices such as a microcomputer and a memory, individual electronic components such as resistors and capacitors are mounted at predetermined positions, and an antenna 2 for receiving and transmitting radio waves constitutes a resonance circuit. A tuning circuit is constructed with a capacitor.

FIG. 3 shows a general configuration example of an information exchange system using an IC card. The information exchange system of FIG. 3 includes an IC card 10a having individual data and an IC
It is composed of a ticket gate device 20a for transmitting and receiving radio waves for supplying power to the card 10a and for transmitting and receiving data. Further, the IC card 10a includes an antenna 2a for receiving radio waves, a rectifying circuit 11 for rectifying the received radio waves to obtain power, and a smoothing capacitor 6, and the inside of the IC card 10a by the obtained power. A power supply circuit 12 for supplying a power supply voltage to the circuit, a detection circuit 13 for detecting a data component of a received radio wave, a modulation / demodulation circuit 14 for demodulating the received data or modulating the data to be transmitted are obtained. And a storage device such as a memory (not shown) for processing and storing the data.

On the other hand, the ticket gate device 20a is used for the IC card 10
Modulation circuit 1 for modulating power and data signals transmitted to a
4a, an antenna 2f for transmitting the radio wave, and I
An antenna 2g for receiving radio waves from the C card 10a,
A detection circuit 13b for detecting the data component of the received radio wave from the IC card 10a, a demodulation circuit 14d for demodulating the detected data, data processing of the demodulated data, and a ticket gate (not shown) according to the processing result. It is composed of a control circuit 15a for controlling the apparatus. The control circuit 15a is composed of a semiconductor device such as a microcomputer and a memory, and the ticket gate device is composed of a gate device for controlling passage and a guide display device.

Next, a general use example of the information exchange system using this IC card will be briefly described with reference to FIG. Since the IC card 10a does not have a built-in battery or the like as a power source, the electric power required by the IC card 10a passes through a ticket gate device 20a installed at a ski ticket gate or the like when passing through the ticket gate device. The antenna 2a of the IC card 10a receives a radio wave having a frequency of several hundreds of kHz to several MHz sent from the antenna 2f of 20a, rectifies it in the rectifier circuit 11 and charges a capacitor or the like to obtain the required power. Only while the electric power is sufficient, the power supply circuit 12 generates a predetermined power supply voltage and supplies it to the internal circuit of the IC card 10a to perform data reception, processing thereof, and data transmission.

In the information exchange system as described above, the IC card 10a and the ticket gate device 2 are connected by mutual communication using radio waves.
It is possible to confirm the data content without making contact with 0a. Therefore, like conventional magnetic cards,
It is not necessary to take out the card from the pocket or the like every time when it passes through the ticket gate or the like, and to open the window of the car to pass through the ticket gate device, which shortens the ticket gate time and makes it difficult to congest. Due to such convenience, the non-contact type IC card and the information exchange system using the IC card are expected to be used more widely in the future, including application to confirmation of tolls on expressways.

[0008]

However, in the conventional IC card, information is exchanged only while the stored electric power can be supplied after the received electric waves are rectified and the capacitors are charged to store sufficient electric power in advance. It is necessary to repeat the process of charging and recharging again when the power is insufficient.Therefore, there is a problem that the communication speed cannot be increased, and it takes time to charge if the communication distance when charging is long. However, there is a problem that the communication distance cannot be extended if power is to be obtained in a short time. Furthermore, the antenna for obtaining power and the antenna for transmitting / receiving data are shared, and it has been necessary to switch between power reception and data transmission / reception depending on the situation. There was a problem that the configuration and programs became complicated and development took time.

SUMMARY OF THE INVENTION It is therefore an object of the present invention to solve these problems, to provide an IC card in which circuit configuration and program development are easy, and to provide an information exchange system with improved characteristics such as communication speed and communication distance. To do.

[0010]

In order to solve the above problems, a non-contact type IC card according to claim 1 is
In a contactless IC card that has a semiconductor integrated circuit and an antenna built-in, receives electric waves from the outside by the antenna and rectifies the electric power, and transmits and receives data based on the electric power, One antenna and a second antenna for transmitting and receiving data are independently provided.

The non-contact type I according to claim 2
An information exchange system using a C card has a semiconductor integrated circuit and an antenna built-in, and receives electric waves from the outside by the antenna to rectify the electric power, thereby obtaining electric power and transmitting / receiving data based on the electric power. In an information exchange system comprising an IC card and a ticket gate device for transmitting electric power radio waves to the IC card and exchanging data information, the ticket gate device has a first antenna for transmitting power and data. Is independently provided with a second antenna for transmitting the data and a third antenna for receiving the data.

An information exchanging system using a non-contact type IC card according to a third aspect is the information exchanging system according to the second aspect, wherein the ticket gate device has a data transmission range of radio waves for supplying electric power. The electric wave is transmitted so as to be longer than the reaching distance of the electric wave for transmitting.

[0013]

According to the structure of the IC card of the present invention, since the antenna 2a for obtaining electric power and the antenna 2b for transmitting / receiving data are provided independently, the antenna 2a is provided.
As a result, it becomes possible to transmit and receive data by the antenna 2b while receiving supply of electric power required for the operation of the IC card.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The configuration of an IC card according to an embodiment of the present invention will be described below in detail with reference to FIG. In this specification, the same or similar parts are denoted by the same reference numerals throughout the drawings to simplify the description. FIG. 1 shows a configuration example of an IC card and an information exchange system using the same according to the present invention. The information exchange system shown in FIG. 1 includes an IC card 10 having individual data and I
It is composed of a ticket gate device 20 that transmits radio waves for supplying electric power to the C card 10 and transmits and receives predetermined data. Further, the IC card 10 has an antenna 2a for receiving a radio wave for power supply, an antenna 2b for receiving a radio wave for data, and a rectifier for rectifying the received radio wave for power to obtain electric power. A circuit 11 and a smoothing capacitor 6, and a power supply circuit 12 that uses the obtained power to supply a power supply voltage to an internal circuit of the IC card 10.
And a detection circuit 13 for detecting the data component of the received radio wave.
A modulator / demodulator circuit 14 for demodulating the received data and modulating the data to be transmitted, and a semiconductor device such as a nonvolatile memory such as a microcomputer or FLASH memory (not shown) for processing and storing the obtained data. It consists of Further, the power supply circuit 12 includes a reference voltage generation circuit that generates a reference voltage from the obtained power,
A voltage clamp circuit that compares the reference voltage with the power supply voltage to keep the power supply voltage at a constant value, and the IC card 10a when the power supply voltage becomes lower than a preset voltage value due to power consumption.
And a power supply voltage detection circuit that outputs a signal for initializing or stopping the operation.

On the other hand, the ticket gate device 20 includes a modulation circuit 14a for modulating a power signal transmitted to the IC card 10, an antenna 2c for transmitting the radio wave thereof, and a modulation circuit for modulating a data signal transmitted to the IC card 10. 14b, an antenna 2c for transmitting its radio wave, and the received IC card 1
Detection circuit 13a for detecting the data component of the radio wave from 0
And a demodulation circuit 14c for demodulating the detected data
And a control circuit 1 for processing the demodulated data and controlling a ticket inspection device (not shown) according to the processing result.
And 5. The control circuit 15 is composed of a semiconductor device such as a microcomputer and a memory, and the ticket gate device is composed of a gate device for controlling passage and a guide display device.

Next, an example of use of the information exchange system using this IC card will be described with reference to FIG. I
The electric power required by the C card 10 is passed through the vicinity of the ticket gate device 20, and the antenna 2c for power of the ticket gate device 20 is passed.
The radio waves sent from the antenna 2a of the IC card 10
Is received, and is rectified by the rectification circuit 11 to charge a capacitor or the like to obtain necessary power, and the power supply circuit 12 generates a predetermined power supply voltage and supplies it to the internal circuit of the IC card 10a.
While receiving this power supply, at the same time, the antenna 2b receives a radio wave such as the number-of-uses confirmation request data transmitted from the data antenna 2d of the ticket inspection device 20, the detection circuit 13 detects the radio wave, and the modulation / demodulation circuit 14 demodulates the data. Then, the control circuit such as a microcomputer is driven to rewrite the data such as the charge and the number of times, the result is modulated by the modulation / demodulation circuit 14, and the result is transmitted from the antenna 2b to the ticket gate device 20. This radio wave is received by the antenna 2e of the ticket gate device 20, and the detection circuit 1
The signal is detected by 3a and demodulated by the demodulation circuit 14c, and the control circuit 15
The data processing is performed to check the usage status of the IC card 10 at the ticket gate device 20, pass or stop only available people or objects, perform a guidance display so as to guide the user in a predetermined direction, and re-display the IC. The data of the card 10 is changed.

In the information exchange system of the present invention, for example,
If a frequency of 500 kHz or less is used as a radio wave for electric power and a frequency of 1 MHz or more is used as a radio wave for data, data interference and the like are reduced. It is necessary for the IC card 10 by making the electric field strength of the electric wave for electric power stronger than the electric field strength of the electric wave for data, or by directing the directivity of the electric wave for electric power to a place farther than the electric wave for data. It is possible to exchange data information more efficiently and in a short time by obtaining sufficient power in advance, so even if you are moving at a considerable speed, such as when paying tolls on expressways. Data can be exchanged reliably.

The structure of the IC card of the present invention may be the same as the structure described in the prior art, but is not limited to this. For example, in addition to the above-mentioned plastic resin, a thermoplastic polyester resin such as polybutylene terephthalate (PBT), or an insulating resin such as a thermosetting resin such as an epoxy resin or a phenol resin is used as the fixing resin 4. The film 3 can be made of PET as described above.
In addition, a film that can withstand a temperature of about 150 ° C. may be used, and only at least one of the upper and lower films may be used. Further, although the substrate 1 is located inside the antenna coil 2 in FIG. 1, it may be located outside the antenna coil 2 and does not depend on the position or size of the substrate. Further, if the substrate and the antenna are attached and stored in a resin case provided with a concave portion, they need not be fixed with resin.

Further, the antennas 2a and 2b may be arranged by arranging the coil parts independently or concentrically in the plane direction or by stacking the coil parts in the thickness direction. Instead, it may be flat or tubular. In addition to the above-mentioned FLASH memory, the storage device may be any non-volatile memory capable of holding the stored data even when the power supply voltage disappears, and may be incorporated in a microcomputer or the like.

[0020]

As described above, according to the IC card and the information exchange system using the same of the present invention, while the antenna 2a supplies the electric power necessary for the operation of the IC card, Since it becomes possible to perform transmission / reception, there is an effect that the characteristics of the communication speed and the communication distance in the IC card can be improved, and at the same time, the circuit configuration in the IC card and the program development can be facilitated. is there.

[Brief description of the drawings]

FIG. 1 is an explanatory view showing a configuration of a non-contact type IC card according to the present invention and an information exchange system using the same.

FIG. 2 is an explanatory view showing a structure of a conventional non-contact type IC card,

FIG. 3 is an explanatory diagram showing a configuration of a conventional non-contact type IC card and an information exchange system using the same.

[Explanation of symbols]

 2: Antenna (tuning circuit) 10: IC card 11: Rectifier circuit 12: Power supply circuit 13, 13a: Detection circuit 14: Modulator / demodulator circuit 14a, 14b: Modulator circuit 14c: Demodulator circuit 15: Control circuit 20: Ticket gate device

Claims (3)

[Claims] 1. A non-contact type IC card having a semiconductor integrated circuit and an antenna built therein, which receives electric waves from the outside by the antenna to rectify the electric power, and which transmits and receives data based on the electric power. A non-contact type IC card, wherein a first antenna for obtaining the electric power and a second antenna for transmitting and receiving the data are provided independently. 2. A non-contact type IC card, which has a semiconductor integrated circuit and an antenna built therein, obtains electric power by receiving radio waves from the outside and rectifying the electric wave, and transmits / receives data based on the electric power. , A ticket gate device for transmitting the electric wave for electric power to the IC card and exchanging information for the data,
The ticket gate apparatus is provided with a first antenna for transmitting the power, a second antenna for transmitting the data, and a third antenna for receiving the data independently. An information exchange system using a non-contact type IC card. 3. The ticket gate device transmits radio waves so that the reach of radio waves for supplying the electric power is longer than the reach of radio waves for transmitting the data. An information exchange system using the non-contact type IC card described in.