JP2002032731A - Non-contact information exchange card - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a non-contact information exchanging device which can discriminatingly and securely use plural functions displayed by plural semiconductor devices without operating a semiconductor device controlling other antennas which should not receive electromagnetic waves although the structure is simple. SOLUTION: Non-contact information exchange cards 1 and 1a are equipped with one antenna 3a and the other antenna 3b which exchange information without contacting with an electromagnetic wave from the outside 13 and semiconductor devices 5a and 5b which have functions of controlling the antennas 3a and 3b respectively and processing the information, and a shield member 17 which cuts off the electromagnetic wave 15 from the outside 13 is arranged between the antennas 3a and 3b.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a contactless information exchange card for exchanging information with the outside without contact.

[0002]

2. Description of the Related Art In recent years, non-contact information exchange cards (hereinafter referred to as IC cards) in card form for performing non-contact data communication are being developed one after another. FIG. 6 is an exploded perspective view showing a configuration example of a conventional IC card 101. FIG.
7A is a transparent plan view showing a configuration example when the IC card 101 in FIG. 6 is viewed from above, and FIG.
FIG. 2A is an exploded side view illustrating a configuration example of the IC card 101 of FIG. This IC card 101 has an antenna 103, an IC
(Integrated Circuit) Chip 10
5, a film 109 and a film 111 are provided. In the following description, the antenna 103 and the IC chip 105
C / antenna module.

The antenna 103 is built in the IC card 101 by being sandwiched between the film 109 and the film 111. The antenna 103 is a film-shaped coil, and guides an electromagnetic wave (magnetic field) emitted from a so-called reader / writer to the coil. This reader / writer has a function of performing non-contact data communication with the IC card 101 using electromagnetic waves. The antenna 103 has I
The C chip 105 is joined, and the power is obtained by the electromagnetic wave induced in the coil to activate the IC chip 105. The IC chip 105 is built in the IC card 101 by being sandwiched between the film 109 and the film 111. The IC chip 105 has a function of controlling the antenna 103 and performing data communication with the reader / writer.

[0004] Further, as an IC card, the one having the following configuration in which a plurality of antennas are mounted can be considered. FIG.
8A is a transparent plan view showing a configuration example of the IC card 101a, and FIG. 8B is a transparent plan view of the IC card 10 shown in FIG.
FIG. 2 is an exploded side view showing a configuration example of 1a. IC card 10
1a differs from the IC card 101 in the configuration of the IC / antenna module. Specifically, the above I
In the C card 101, there is only one IC / antenna module, but in the IC card 101a, FIG.
Are arranged in a plane as shown in FIG.

[0005] Further, as the IC card, the one having the following configuration in which a plurality of antennas are mounted can be considered. FIG. 9A is a transparent plan view showing a configuration example of the IC card 101b, and FIG. 9B is an IC card 1 shown in FIG.
It is a side view which shows the example of a structure of 01b. IC card 101
b differs from the IC card 101 in the configuration of the IC / antenna module. Specifically, the above IC
Although the card 101 has only one IC / antenna module, the IC card 101b is arranged so as to overlap in the vertical direction of the films 109 and 111 as shown in FIG. 9B. When these IC chips are arranged in this manner, the size of the IC card 101b can be reduced. The IC card 101b can perform data communication with the same function by holding the IC card 101b over the reader / writer from the back surface or from the front surface.

[0006]

However, in such an IC card using a plurality of antennas, the reader / writer cannot be used.
In some cases, both antennas may receive radio waves from the writer. Therefore, the conventional IC card 101
In some cases, a and 101b could not operate a plurality of functions while distinguishing a plurality of functions.

Accordingly, the present invention solves the above-mentioned problems, and has a simple structure, but does not operate a semiconductor device that controls another antenna that should not receive an electromagnetic wave. It is an object of the present invention to provide a non-contact type card-shaped information exchange device which can surely use the functions described above.

[0008]

SUMMARY OF THE INVENTION The object of the present invention is to provide an antenna for exchanging information in a non-contact manner by an external electromagnetic wave, and an antenna for exchanging information. A non-contact information exchange card comprising: a plurality of semiconductor devices each having a function of processing the information, the plurality of semiconductor devices having a function of processing the information, wherein the non-contact information exchange card is disposed between the one antenna and another antenna, The present invention is achieved by a non-contact information exchange card including a shielding member that shields electromagnetic waves from the communication card. According to the configuration of the first aspect, each of the one antenna and the other antenna is controlled by the plurality of semiconductor devices. The one antenna and the other antenna exchange information with the outside in a non-contact manner by electromagnetic waves. Also,
Each of the plurality of semiconductor devices has a function of processing the information. And the shielding member is arrange | positioned between one antenna and another antenna. Therefore, the shielding member can prevent one antenna from receiving an electromagnetic wave from the outside and prevent the other antenna from receiving the electromagnetic wave. Therefore, the contactless information exchange card can operate only the semiconductor device that controls one antenna, so that the plurality of functions of the plurality of semiconductor devices can independently and stably operate.

A second aspect of the present invention is characterized in that, in the configuration of the first aspect, the plurality of semiconductor devices have a plurality of different functions for respectively processing the information. According to the configuration of the second aspect, in addition to the function of the first aspect, the non-contact type information exchange card shields unnecessary electromagnetic waves by the shielding member, so that only one antenna receives the electromagnetic waves and the other antenna receives the electromagnetic waves. Can be prevented from receiving electromagnetic waves. Therefore, even if the plurality of semiconductor devices have a plurality of different functions, only the semiconductor device that controls the antenna that has received the electromagnetic wave can be operated. Therefore, a plurality of different functions of the semiconductor device can operate normally independently of each other. In addition, since the plurality of semiconductor devices have a plurality of different functions, the non-contact information exchange card can perform a plurality of various processes on information exchanged with the outside.

According to a third aspect of the present invention, in the configuration of the first aspect, the shielding member has a flat plate shape and covers the one antenna and the other antennas, the plurality of semiconductor devices, and the shielding member. It is built in the flat base material so as to be parallel to the base material, and one set of the one antenna and the semiconductor device, and the other set of the other antenna and the semiconductor device, It is characterized by being arranged with a flat shielding member interposed therebetween. According to the configuration of the third aspect, in addition to the function of the first aspect, the shielding member surely shields the electromagnetic wave, so that one set of one antenna and the semiconductor device, and another set of the other antenna and the semiconductor The devices can operate normally independently of each other. Therefore, the contactless information exchange card can perform a stable operation.

According to a fourth aspect of the present invention, in the configuration of the third aspect, the one set of the one antenna and the semiconductor device and the other set of the other antenna and the semiconductor device are formed of the flat plate-like shape. It is characterized in that it is arranged at a position facing each other across the shielding member. According to the configuration of claim 4, in addition to the function of claim 3, the shielding member surely shields the electromagnetic wave, so that one set of one antenna and the semiconductor device, and the other set of other antennas and the semiconductor The equipment is
Each can operate normally independently. Therefore, the contactless information exchange card can perform a stable operation.

According to a fifth aspect of the present invention, in the configuration of the third aspect, the one set of the one antenna and the semiconductor device and the other set of the other antenna and the semiconductor device are formed of the flat plate. It is characterized in that it is arranged at a position where it does not overlap in the vertical direction of the substrate. According to the configuration of claim 5, in addition to the function of claim 3, the shielding member reliably shields the electromagnetic wave, so that one set of one antenna and the semiconductor device, and the other set of other antennas and the semiconductor The devices can operate normally independently of each other.
Therefore, the contactless information exchange card can perform a stable operation.

According to a sixth aspect of the present invention, in the configuration of the first aspect, the shielding member is a magnetic material.
According to the configuration of claim 6, in addition to the function of claim 1, the shielding member can more reliably shield the electromagnetic wave received by one antenna from being received by the other antenna. Therefore, the contactless information exchange card can perform a stable operation.

[0014]

Preferred embodiments of the present invention will be described below in detail with reference to the accompanying drawings. Note that the embodiments described below are preferred specific examples of the present invention,
Although various technically preferable limits are given, the scope of the present invention is not limited to these modes unless otherwise specified in the following description.

First Embodiment FIG. 1 is a perspective view showing an example in which an IC card 1 according to a first embodiment of the present invention is used. The IC card 1 (contactless information exchange card) is a so-called reader /
A non-contact data communication is performed between the writer 13 (external) and the electromagnetic wave 15. Reader / writer 13
Has a function of generating the electromagnetic wave 15 and receiving the electromagnetic wave 15 generated by the IC card 1. On the other hand, the IC card 1 is in the form of a card and has a reader /
Data communication is performed by holding the writer 13 close to the writer 13.
Therefore, the reader / writer 13 can acquire information stored in the IC card 1 or write information to the IC card 1.

FIG. 2A is a transparent plan view showing a configuration example of the IC card 1 of FIG. 1, and FIG. 2B is a transparent plan view of FIG.
FIG. 2 is an exploded side view showing a configuration example of the IC card 1 of FIG. FIG.
(A) The IC card 1 has a film 9 (base material), an IC /
It has an antenna module 7a (one set of antenna and semiconductor device), a shielding sheet 17 (shielding member), an IC / antenna module 7b (other antennas and semiconductor devices), and a film 11 (base material). The film 9 and the film 11 are composed of an IC / antenna module 7a, a shielding sheet 17, and an IC / antenna module 7b, respectively.
At least a part of it. The films 9 and 11 are made of the same material.
The exterior of the C card 1 is formed. The material of the film 9 and the film 11 is, for example, PET (Polyeth).
ylen Terephthalate). The IC / antenna module 7a is an IC chip 5a
(Semiconductor device) and an antenna 3a.

The antenna 3a is built in the IC card 1 by being sandwiched between the film 9 and the film 11. The antenna 3a is a film-shaped coil.
The electromagnetic wave 15 (magnetic field) emitted from the reader / writer 13 is guided to the coil. Further, an IC chip 5a is bonded to the antenna 3a, and the IC chip 5a is activated by obtaining electric power by an electromagnetic wave induced in a coil. This IC
The chip 5a is embedded in the IC card 1 by being sandwiched between the film 9 and the film 11. The IC chip 5a has a function of controlling the antenna 3a to perform data communication with the reader / writer 13 of FIG. 1 at a predetermined frequency.

The IC / antenna module 7b has an IC chip 5b (semiconductor device) and an antenna 3b. I
Since the C / antenna module 7b has the same configuration as the IC / antenna module 7a, the description of the configuration is omitted. The IC / antenna module 7b performs data communication at a frequency different from that of the IC / antenna module 7a. The IC / antenna module 7b is an IC / antenna module 7b.
Data communication may be performed at the same frequency as the antenna module 7a.

The feature of the present invention is that FIG.
As shown in (B), the IC / antenna module 7a and the IC / antenna module 7b are arranged with the shielding sheet 17 interposed therebetween. Further, the IC / antenna module 7a and the IC / antenna module 7b are preferably arranged to face each other with the shielding sheet 17 interposed therebetween. This shielding sheet 17 is used for the antennas 3a and 3b.
A gap is provided at a certain distance from each other.

The shielding sheet 17 is in the form of a film, and is sandwiched between the films 9 and 11 so as to be parallel.
The shielding sheet 17 is, for example, an IC / antenna module 7
a and slightly larger than the outer peripheral edge of the IC / antenna module 7b, and has a function of shielding the electromagnetic wave 15 from the reader / writer 13 in FIG. Further, the shielding sheet 17 is made of an IC
The electromagnetic waves generated by the / antenna module 7a and the IC / antenna module 7b may be shielded. In this case, since the shielding sheet 17 has such a function, the IC / antenna module 7a and the IC / antenna module 7b can perform a stable operation without being influenced by each other's operation.

The shielding sheet 17 may be made of any material having a function of absorbing electromagnetic waves. The shielding sheet 17 may be made of a magnetic material, for example, ferrite. Further, examples of the material of the shielding sheet 17 include iron and the like. The thickness of the shielding sheet 17 is
Preferably, about 0.2 mm is sufficient. By doing so, the IC card 1 can use the plurality of functions of the IC chip 5a and the like more reliably.

The IC card 1 is configured as described above.
Next, an operation example of the IC card 1 will be described. FIG.
FIG. 3 is a side view showing an example of a state in which an electromagnetic wave 15 is shielded by a shielding sheet 17 in the IC card 1. The IC card 1 has a plurality of functions, such as a commuter pass that can pass through a ticket gate without contact and a so-called electronic money function that handles money electronically without the need for cash. . These functions are performed by an IC as shown in FIG.
The functions are selectively used by holding the front side and the back side of the card 1 over the reader / writer 13. In the following description, the IC chip 5a performs the function of electronic money, and
The description will be made assuming that the chip 5b exhibits the function of a commuter pass.

The user of the IC card 1 holds the IC card 1 with his / her hand H to use the function of the commuter pass at the ticket gate, for example, and the surface of the IC card 1 having the function of the commuter pass is provided at the ticket gate. Closer to the reader / writer 13.
Note that the IC card 1 may be left in the pocket of the clothes or the like without using the hand H.

The reader / writer 13 receives the electromagnetic wave 15 generated by the IC card 1. The IC card 1 provides, for example, information from the user's boarding station to the getting off station and information on the expiration date to the reader / writer 13. Reader / writer 13
Generates an electromagnetic wave 15 to write in the IC card 1 that the user has boarded the railway.

The IC card 1 receives the electromagnetic wave 15 from the reader / writer 13 through the antenna 3b as shown in FIG. At this time, the electromagnetic wave 15 passing through the antenna 3b
Is not absorbed by the shielding sheet 17 as shown in FIG. Therefore, the IC chip 5a does not operate. Therefore, the IC chip 5b can reliably perform only the function of a commuter pass based on the electromagnetic waves 15 received by the antenna 3b.

On the other hand, the user of the IC card 1 holds another side of the IC card 1 over a reader / writer 13 installed in a store to make shopping. Then, as described above, the electromagnetic wave 15 generated by the reader / writer 13 does not reach the antenna 3b after reaching the antenna 3a, so that the IC chip 5b does not operate. Therefore, the IC chip 5
a can reliably exert only the function of electronic money.

According to the first embodiment of the present invention, the IC card 1 has a simple structure, but does not operate an IC chip for controlling another antenna which should not receive an electromagnetic wave. Thus, a plurality of functions exerted by each can be reliably used. Also,
Even if a plurality of the same functions are mounted on the IC card 1, the shielding sheet 17 can absorb the extra electromagnetic waves 15 and operate normally while distinguishing the plurality of functions. Therefore, even if the user keeps the IC card 1 in a wallet or a regular purse, the IC card 1 is
The front and back sides are distinguished by the call from 7, and a plurality of functions for each of the front and back sides can be distinguished and operated. Also,
Since a plurality of functions operate completely independently on the front and the back of the IC card 1, even if one of the functions has a trouble, it is possible to easily determine which function is causing the trouble. In addition, IC card 1
Has a plurality of functions, so that the user does not need to own a plurality of IC cards having the plurality of functions. Further, since the IC card 1 does not require a complicated structure, the manufacturing cost can be reduced, and the material used is not different from the conventional material, so that the cost of the material is reduced while providing a plurality of functions. can do.

The IC card 1a of the second embodiment the second embodiment (non-contact information exchange cards), since it is almost the same configuration as that of the IC card 1a of the first embodiment in FIGS. 1 to 3 identical Is described using the reference numerals in FIGS. 1 to 3 with a focus on different points. FIG. 4A shows the IC card 1a of FIG.
FIG. 4B is a transmission plan view showing a configuration example of FIG.
FIG. 3A is an exploded side view illustrating a configuration example of the IC card 1a. In the IC card 1a, the IC / IC in the first embodiment is used.
The arrangement of the antenna modules 7a and 7b is different.
Specifically, the IC / antenna module 7a (one set of antenna and semiconductor device) and the IC / antenna module 7b (one set of other antenna and semiconductor device) are located at positions where the films 9 and 11 do not overlap in the vertical direction. Are located.

FIG. 5 shows an example of the electromagnetic wave 1 in the IC card 1a.
FIG. 5 is a side view showing an example of a state in which a shielding sheet 5 is shielded by a shielding sheet 17. Since the electromagnetic wave 15 is absorbed or reflected by the shielding sheet 17 similarly to the IC card 1 according to the first embodiment, the IC card 1a can operate normally even if it has a plurality of functions. .

According to the second embodiment of the present invention, substantially the same effects as in the first embodiment can be exerted, and in addition, the IC card 1a is entirely held over the reader / writer 17. There is no necessity, and it is possible to react by just holding the half up and reacting on the front and not reacting on the back. That is, the IC card 1a can operate, for example, with its front and back functions distinguished without holding the entire IC card 1a over the reader / writer 17. By doing so, the user of the IC card 1a can use the IC card 1a as shown in FIG.
Since the reaction can be reliably performed even when the card 1a is held in the hand H, the IC card 1a is easy to use.

The present invention is not limited to the above embodiment. In the above embodiment, as a specific example of the frequency of the electromagnetic wave 15 between the IC card 1, 1a and the reader / writer 13, as described in the ISO specification,
For example, 13.56 MHz, 1.3 GHz, 2.45 GH
z and the like. In addition, it goes without saying that the IC card 1 or 1a may handle the same frequency by a plurality of functions. In addition, the components of the above embodiment can be partially omitted or arbitrarily combined in a manner different from the above.

[0032]

As described above, according to the present invention,
A non-contact card that has a simple structure and can reliably use a plurality of functions performed by a plurality of semiconductor devices without operating a semiconductor device that controls another antenna that should not receive electromagnetic waves. A state information exchange device can be provided.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an example of a state in which an IC card according to a first embodiment of the present invention is used.

FIG. 2 is a transparent plan view and an exploded side view showing a configuration example of the IC card of FIG. 1;

FIG. 3 is a side view showing an example of how an electromagnetic wave is shielded by a shielding sheet in an IC card.

FIG. 4 is a transparent plan view and an exploded side view showing a configuration example of the IC card of FIG. 1;

FIG. 5 is a side view showing an example of how an electromagnetic wave is shielded by a shielding sheet in an IC card.

FIG. 6 is an exploded perspective view showing a configuration example of a conventional IC card.

7 is a transparent plan view and an exploded side view showing a configuration example when the IC card of FIG. 6 is viewed from above.

FIG. 8 is a transparent plan view and an exploded side view showing a configuration example of an IC card.

FIG. 9 is a transparent plan view and a side view showing a configuration example of an IC card.

[Explanation of symbols]

1, 1a: IC card (contactless information exchange card), 3a, 3b: Antenna, 5, 5a: IC
Chip (semiconductor device), 7a... IC / antenna module (one set of antenna and semiconductor device), 7b.
..IC / antenna modules (other antennas and semiconductor devices), 9, 11 film (base material), 15 electromagnetic wave, 17 shielding sheet (shielding member)

Claims (6)

[Claims] 1. An antenna and another antenna for exchanging information in a non-contact manner by an external electromagnetic wave; and controlling the one antenna and the other antenna, respectively.
A non-contact information exchange card including a plurality of semiconductor devices having a function of processing the information, the non-contact information exchange card being disposed between the one antenna and another antenna, and shielding the external electromagnetic waves. A non-contact type information exchange card comprising a member. 2. The non-contact information exchange card according to claim 1, wherein the plurality of semiconductor devices have a plurality of different functions for respectively processing the information. 3. The shielding member has a flat shape, and the flat shape is parallel to a flat base material covering the one antenna and the other antennas, the plurality of semiconductor devices, and the shielding member. The one set of the one antenna and the semiconductor device and the other set of the other antenna and the semiconductor device are embedded in the base material, and are arranged with the flat shielding member interposed therebetween. The contactless information exchange card according to claim 1, wherein: 4. The one set of the one antenna and the semiconductor device and the other set of the other antenna and the semiconductor device are arranged at positions facing each other with the plate-shaped shielding member interposed therebetween. The contactless information exchange card according to claim 3, wherein 5. The one set of the one antenna and the semiconductor device and the other set of the other antenna and the semiconductor device are arranged at positions not overlapping in the vertical direction of the flat base material. 4. The method according to claim 3, wherein
Contactless information exchange card described in. 6. The non-contact information exchange card according to claim 1, wherein the shielding member is a magnetic material.