JP3621001B2 - IC card with communication function and asphyxia method - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an IC card, in particular, an IC card with a non-contact type communication function and a method for its assassination.
[0002]
[Prior art]
Conventionally, IC cards have been used for various purposes. In particular, the conventional IC card with communication function catches radio waves from the main unit, so the antenna is always in a loop (a state where radio waves can be received at all times), and within that range (area where radio waves can be received from the main unit) It can always be used.
[0003]
[Problems to be solved by the invention]
As described above, in the area where radio waves can be received from the main unit, the IC card with communication function that you have has received radio waves, and the card is unwilling (unwanted) regardless of the intention of the person. There was a demerit that it was used carelessly.
[0004]
As countermeasures, an IC card is encased in an electromagnetic shielding case as in the inventions of JP-A-9-269985 and JP-A-10-201517, and an IC card is used as in the invention of JP-A-11-11536. Some use bags to wrap, and in order to prevent the IC card from malfunctioning, reading, and writing due to unspecified electromagnetic waves that the user does not want, all of them needed something to wrap the outside of the IC card . Therefore, there was a problem that it was inconvenient to carry.
[0005]
Here, the main objects to be solved by the present invention are as follows.
That is, the first object of the present invention is to provide an IC card with a communication function and a method of assassination that can make the communication function inoperable by changing the form of the IC card itself.
[0006]
The second object of the present invention is to provide an IC card with a communication function that can be set to be operable or impossible by changing a part of the shape of an antenna incorporated in the IC card with a communication function, and a provisional death method. To do.
[0007]
The third object of the present invention is not to provide an IC card with a communication function and a method of assassination capable of reducing the induced voltage to a pseudo-dead voltage below the operating voltage by changing a part of the antenna shape of the IC card with the communication function. It is what.
[0008]
Other objects of the present invention will become apparent from the specification, drawings, and particularly the description of each claim.
[0009]
[Means for Solving the Problems]
In order to achieve the above object, the method of the present invention is characterized in that a method is employed in which the usability can be changed by changing the shape of the IC card with communication function itself.
[0010]
Further, the card of the present invention has a loop antenna incorporated in an IC card with a communication function for receiving a signal from the main device, an interface for transmission / reception with the outside, a storage unit for storing predetermined data, and these operations. Having a circuit composed of a control unit for controlling the above and wiring for organically connecting these units, and means for forming the IC card itself so as to be bent or unfoldable together with the loop antenna. Features.
[0011]
In addition, according to the above configuration, by deforming the IC card with communication function itself, the antenna is also deformed to form a loop or release the loop, so that it is possible to select whether or not to receive a signal from the main device. Features.
[0012]
Moreover, according to the said structure, a surface area reduces by carrying out the bending polymerization of IC card itself, it becomes compact and it becomes easy to carry.
[0013]
More specifically, the above problem is solved by adopting a novel characteristic construction method or means from the superordinate concept to the subordinate concept that the present invention enumerates. The
[0014]
That is, the first feature of the method of the present invention is that the induced voltage generated in the loop antenna is caused to act on the loop antenna embedded in the IC card by folding or unfolding the form of the IC card itself. The IC card provisional communication method with communication function is adopted so as to be inoperable until the folding or unfolding of the above form is released by lowering the provisional death voltage below the operating voltage.
[0015]
The second feature of the method of the present invention is the configuration adoption of the IC card pseudo-death method with a communication function in which the pseudo-dead voltage in the first feature of the method of the present invention is an induced voltage of 2.1 V or less.
[0016]
A third feature of the method of the present invention is that the loop antenna according to the first or second feature of the method of the present invention adopts a configuration of an IC card provisional death method with a communication function in which the magnetic flux area is 17 cm ² or less when bent. is there.
[0017]
A fourth feature of the method of the present invention is that the bending of the IC card itself in the first, second or third feature of the method of the present invention is an IC card with a communication function in which a loop antenna is embedded, In the case of an IC card with a communication function that has two folds or a twisted loop antenna embedded, the IC card with communication function has a configuration adopted as a two-fold or three-fold IC card temporary death method.
[0018]
The first feature of the card of the present invention is that a loop antenna disposed along the inner periphery of the IC card, an interface for transmitting / receiving to / from the outside, a storage unit for storing predetermined data, and a control for controlling these operations. An IC card in which a circuit comprising a component, a circuit including a loop antenna and the interface, an interface and the control unit, and a wiring connecting the control unit and the storage unit is embedded in the loop The structure of the IC card with communication function is formed so that it can be bent or unfolded along the folding line with the antenna.
[0019]
A second feature of the card of the present invention is that the loop antenna according to the first feature of the card of the present invention has a communication function in which a single square side is discontinuous and an intermediate partition antenna portion is provided along the fold line. It is in the configuration adoption of the attached IC card.
[0020]
The third feature of the card of the present invention is that the fold line in the first or second feature of the present card avoids the interface, the control unit, and the storage unit, and only the wiring and the loop antenna. The configuration of the IC card with communication function, which is a dividing line that passes, is employed.
[0021]
The fourth feature of the card of the present invention is that the torsion loop antenna drawn by crossing at least one place on the IC card, an interface for transmitting / receiving to / from the outside, a storage unit for storing predetermined data, and operations thereof An IC card in which a circuit comprising a control unit for controlling the torsional loop, the torsion loop antenna and the interface, the interface and the control unit, and a wiring for connecting the control unit and the storage unit is embedded Communication formed by itself being foldable or unfoldable along a broken line that is a dividing line passing only through the intersection of the wiring and the torsion loop antenna, avoiding the interface, the storage unit, and the control unit It is in the configuration adoption of IC card with function.
[0022]
DETAILED DESCRIPTION OF THE INVENTION
DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described in detail with reference to the drawings with respect to a card example and a method example.
(Card example 1)
FIG. 1 is a diagram for explaining the concept of the card example 1. A is an IC card with communication function of the card example. In FIG. 1, the IC card with a communication function itself can be deformed (folded), and the availability can be selected depending on the function.
[0023]
FIG. 2 is a system for using the IC card A shown in FIG. 1, and 1a is arranged in a loop along the inner periphery of the IC card A with a communication function so as to receive a signal from the main device .alpha. And a loop antenna tuned to the card R / W (read / write) resonance frequency of the main device α.
[0024]
2 is an interface for transmitting and receiving with the outside, 3 is a storage unit for storing predetermined data, 4 is a control unit for controlling these operations, and 5a to 5c are wirings for organically connecting them. is there.
The IC card A with communication function is characterized by having a circuit constituted by the above elements.
[0025]
(Method Example 1)
A method example 1 of this embodiment applied to this card example 1 will be described with reference to the drawings.
FIG. 3 is an explanation of the IC card A shown in FIG. 2 and a method, and the loop antenna 1a can be looped by folding the IC card A with communication function itself into two along a folding line 6a such as a groove. The IC card A with a communication function cannot be used because it cannot be formed and cannot receive radio waves. Also, by returning to the initial state (deployed state), the loop antenna 1a forms a loop again and can be used.
[0026]
(Card example 2)
The left side of FIG. 4 is an IC card B with a communication function of this card example 2. In FIG. 4, the loop antenna 1b is discontinuous at one corner (upper left corner and lower right corner in the figure) 1b 'along the broken line 6b. The same configuration as the card example 1 is shown except that the intermediate partition antenna 1b ″ is provided, and the same elements are denoted by the same reference numerals.
[0027]
(Method Example 2)
A method example 2 of this embodiment applied to this card example 2 will be described with reference to the drawings.
The right side of FIG. 4 is an explanatory diagram of this method example. Here, in the IC card B with communication function, in the initial state (deployed state), the single-sided edge 1b 'is discontinuous, so a loop cannot be formed and radio waves cannot be received.
[0028]
Even if the single-sided side 1b 'is formed continuously, the two left and right loop portions of the loop antenna 1b are formed in reverse winding, and in the initial state (deployed state), the induced currents cancel each other and receive radio waves. Can not. Therefore, in any case, the loop antenna 1b forms a superposition loop for the first time by receiving the radio wave reception by deforming the communication function IC card B itself into two along the folding line 6b. Become. That is, the communication function-equipped IC card B can be used.
[0029]
(Card example 3)
FIG. 5 shows IC cards C to G with a communication function of this card example 3, and show twisted loop antennas L1 to L5 drawn to intersect with the IC cards C to G at one or more locations, (a) (b) (E) is a case of left-right symmetry or up-down symmetry, (c) and (d) are cases of left-right asymmetry, and (e) is a case of crossing two places.
[0030]
The broken lines M1 to M5 ″ always cross only the intersections L1 ′ to L5 ″ and the wiring 5b or 5c with respect to the loop antennas L1 to L5.
In (b), a normal card size can be used only after two cards are joined and folded at the folding line M2.
In (e), two folding lines M5 ′ and M5 ″ are provided so that they can be used as three folds.
[0031]
(Method Example 3)
A method example 3 of the present embodiment applied to the card example 3 will be described with reference to FIG.
The loop portion is formed in a reverse winding with the folding lines M1 to M5 ″ of the twisted loop antennas L1 to L5 intersecting at least one place with the IC cards with communication functions C to G interposed therebetween. They are killed and in a dead state where they cannot receive radio waves.
[0032]
Therefore, the IC card C to G with communication function itself is bent and deformed along the folding lines M1 to M5 ″ to cancel the cancellation, and the loop portion at the time of bending secures the required magnetic flux area and the induced voltage to perform the specified operation. Radio waves can be received on condition that a voltage can be applied.
That is, the communication function-equipped IC cards C to G can be used.
[0033]
【Example】
(First embodiment)
A first embodiment of the present invention corresponding to the card example 1 and the method example 1 will be described below with reference to the drawings.
FIG. 6 is an explanatory diagram of an assassination experiment of this example, and FIG. 7 is a correlation characteristic diagram between the induced voltage and the loop magnetic flux area.
[0034]
As shown in FIG. 6, the voltage that can be supplied by the loop antenna β1 when the normal loop antenna β1 is formed inside the IC card β was measured.
First, a voltmeter γ is connected to both ends (positions can be anywhere) of the loop antenna β1 incorporated in the IC card β.
[0035]
Next, the IC card β is placed over the card R / W portion α1 of the main device α shown in FIG. 2 having a resonance frequency of 13.56 MHz with a distance of about 1 cm, and the voltage is measured.
At this time, the area through which the magnetic flux can pass was about 20 cm ² MAX and the voltage was 2.5V. In order for the IC card β to operate stably, a rated operating voltage of the minimum voltage 2.1 V shown in the dotted line level in FIG. 7 is required.
[0036]
Next, the IC card β was folded in half, and the voltage was measured in the same manner.
At this time, there was almost no portion through which the magnetic flux could pass, and the area of the loop antenna β1 which was bent and overlapped with the loop antenna β1 was about 1 cm ² . The voltage was a temporary death voltage of about 0.1V.
[0037]
As shown in FIG. 7, since a proportional relationship is established between the magnetic flux (passable) area and voltage, when the magnetic flux area is 17 cm ² or less, the IC card β itself is in a temporarily unusable state. Accordingly, by bending and deforming the IC card β so that the magnetic flux area becomes 17 cm ² or less, the IC card β can be temporarily put into a temporarily unusable state.
[0038]
(Second embodiment)
A second embodiment of the present invention corresponding to the card example 2 and the method example 2 will be described with reference to the drawings.
8A and 8B are voltage measurement waveform diagrams of the present embodiment. FIG. 8A is an operation voltage waveform diagram when the IC card itself is folded in half, and FIG. 8B is a temporary death voltage waveform diagram when developed.
[0039]
In the second embodiment, as in the first embodiment, the IC card is placed over the card R / W section α1 of the main device α shown in FIG. 2 having a resonance frequency of 13.56 MHz, and the voltage is measured.
When (a) is folded in two, the superposition magnetic flux area is 3 cm ² , and an operating voltage of about 2.6 V is shown. When (b) is deployed, a twisted loop is reversely wound and the folding line is sandwiched. Thus, the voltages of the opposing loop portions cancel each other, and a temporary death voltage of about 0.1 to 0.15 V is shown.
[0040]
From the experimental results of the first and second embodiments, when the loop antenna is bent by forming a normal loop antenna inside the IC card, the loop magnetic flux area of the loop antenna becomes 17 cm ² or less, and the chip of the IC card can be operated. In the shape where the IC card is developed by forming a twisted loop antenna inside the IC card, the voltages induced in the opposing loops cancel each other out, so that the IC card chip can operate. In any case where no voltage is generated, it becomes a pseudo-dead state.
[0041]
The latter case takes precedence, and the former loop magnetic flux area is not limited to 17 cm ² or less, and if the induced voltage is 2.1 V or less, it is impossible to escape the assassination state.
[0042]
The above conditions are when a CMOS created by a 0.5 μm rule process is used. In the CMOS produced by a 0.25 μm rule process, the above-mentioned temporary death voltage is 1.0 V or less. In the case of other CMOSs as well, a difference occurs in the pseudo-dead voltage due to the difference in the manufacturing process.
[0043]
Further, the above condition is a case where a CMOS manufactured by a 0.5 μm rule process is adopted, and in the CMOS manufactured by a 0.25 μm rule process, the magnetic flux area described above becomes smaller in proportion to the provisional dead voltage. Similarly, in the case of other CMOSs, a difference in magnetic flux area is caused by a difference in manufacturing process.
[0044]
【The invention's effect】
As described above, according to the present invention, whether or not the IC card with communication function can be used can be selected by bending or expanding and deforming the IC card with communication function.
Further, by deforming, the surface area of the IC card with communication function is reduced, so that it is not bulky at the time of carrying.
In addition, when a plurality of IC cards with communication functions of the same method are held, it is possible to protect the IC cards with communication functions that are not desired to be used in a temporary death state.
[Brief description of the drawings]
FIG. 1 is a view for explaining the concept of a card example 1 showing an embodiment of the present invention.
FIG. 2 is a usage system diagram of the card example 1;
FIG. 3 is a diagram for explaining card example 1 and method example 1;
FIG. 4 is a diagram for explaining card example 2 and method example 2;
FIGS. 5A to 5E are diagrams showing various patterns of a torsion loop antenna in order to explain the card example 3 and the method example 3. FIG.
FIG. 6 is an explanatory diagram of an assassination experiment of the first embodiment of the present invention.
FIG. 7 is a correlation characteristic diagram between the induced voltage and the loop magnetic flux area in the same as above.
8A and 8B show a second embodiment of the present invention, wherein FIG. 8A is an operating voltage waveform diagram when the IC card is folded in half, and FIG. 8B is a temporary death voltage waveform diagram when the IC card is unfolded.
[Explanation of symbols]
A to G, β: IC card with communication function α: main device α1: card R / W unit γ: voltmeters 1a-1b, L1-L5 ... loop antenna 1b '... diagonal side 1b "... intermediate partition antenna unit 5b ', L1' to L5 "... intersection 2 ... interface 3 ... storage unit 4 ... control unit 5a-5c ... wiring 6a-6b, M1-M5" ... broken line

Claims (8)

By bending or unfolding the form of the IC card itself, it acts on the loop antenna embedded in the IC card, and the induced voltage generated in the loop antenna is reduced to a temporary death voltage equal to or lower than the operating voltage. Inoperable until the folding or unfolding of the
An IC card assassination method with a communication function. The assassination voltage is
The induced voltage is 2.1V or less,
The IC card provisional death method with a communication function according to claim 1. The loop antenna is
When bent, the magnetic flux area is 17 cm ² or less.
The IC card provisional death method with a communication function according to claim 1 or 2. The bending of the IC card itself is
In the case of an IC card with a communication function in which a loop antenna is embedded, it is two-fold, or in the case of an IC card with a communication function in which a twisted loop antenna is embedded, it is two-fold or three-fold.
The IC card provisional death method with a communication function according to claim 1, 2, or 3. A loop antenna arranged along the inner periphery of the IC card,
An interface for sending and receiving to and from the outside,
A storage unit for storing predetermined data;
A control unit for controlling these operations;
The loop antenna and the interface, the interface and the control unit, and the wiring connecting the control unit and the storage unit;
The IC card itself in which a circuit including the above components is embedded is formed so that it can be folded or unfolded along the fold line together with the loop antenna.
An IC card with a communication function. The loop antenna is
A single-sided corner is discontinuous and the intermediate partition antenna portion is provided along the fold line.
The IC card with a communication function according to claim 5. The broken line is
A dividing line that avoids the interface, the control unit, and the storage unit and passes only the wiring and the loop antenna.
The IC card with a communication function according to claim 5 or 6. A twisted loop antenna drawn across one or more IC cards,
An interface for sending and receiving to and from the outside,
A storage unit for storing predetermined data;
A control unit for controlling these operations;
The twisted loop antenna and the interface, the interface and the control unit, and the wiring connecting the control unit and the storage unit;
The IC card itself in which a circuit including the above components is integrally embedded is a broken line that is a dividing line that passes only the intersection of the wiring and the twisted loop antenna, avoiding the interface, the storage unit, and the control unit. Bendable or unfoldable along,
An IC card with a communication function.

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