JPS59202583A - Identification card - Google Patents

Abstract

PURPOSE:To produce a highly reliable identification card which is hardly affected by defective contact and magnetism by generating an identification signal in accordance with presence or absence of shields buried in the card. CONSTITUTION:In case magnetic shields 2 and 3 are buried in positions A and D out of positions A-D in a card body 1 and are read by a reader, coils 11-14 are excited by an AC power source 15 to generate an alternating field. Though this alternating field is received by coils 21-24, only coils 22 and 24 generate an electromotive force because magnetic shields 2 and 3 exist, and this electromotive force is read by a reading circuit 25. The read digital signal is ''0101''.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to identification cards such as cash cards and credit cards.

Conventionally, this type of identification card has mainly been of magnetic type. However, this card had the disadvantage that it could be demagnetized by an external magnetic field, or the stored magnetic pattern could be disturbed due to other influences.

Also, Patent Publication No. 53-6491 filed on March 3, 1970.
In Figures 1 to 3 of the No. ``Identification Card,'' contacts are used to exchange identification signals with the outside. This "identification card" can eliminate the drawbacks of the magnetic type, but since it uses contacts, the problem of poor contact arises. Since identification cards are generally handled by an unspecified number of people, they are often handled roughly, and as a result, the contact surfaces are soiled or naturally oxidized, resulting in poor contact.

This invention was made in order to eliminate the drawbacks of the conventional ones as described above, and it is possible to connect the signal edge and the edge to the reading device that reads the signal of the identification card without contact or without contact except for grounding. , which also aims to improve the shortcomings of the magnetic type and provide a highly reliable identification card.

The present invention relates to an identification card that generates an identification signal depending on the presence or absence of a shield embedded in the card.Embodiments of the present invention will now be described with reference to the drawings.

Figures 1(a) and 1(b) show an embodiment of this invention, (4)
indicates an identification card (hereinafter referred to as a card). (1) f
The card body is made of a material such as plastic, and magnetic shields (2) and (3) are embedded in predetermined positions, here at positions A and D of AlB, C, and D.

Fig. 2 shows an embodiment in which a card (4) is placed in a reading device, where (10) is a transmitting part, and a coil (11) (1
2) (13) (14) are arranged at positions A, B, C', and D, and are equipped with an AC power source (15). (20) is the receiving section and the receiving coil (21) (22) (23)
(24) are placed in positions AlB, C, and D while holding the card (4), and the signals received by these coils are sent to the reading circuit (
25).

Next, to explain the operation, the coils (11), (12), (13), and (14) are excited by the AC power supply (15) to generate an alternating magnetic field, and this alternating magnetic field is applied to the coil (21).
(22) (23) (24), but since there is a magnetic shield (2) (3), the coil (21) (
The alternating magnetic field hardly reaches the coil (22).
Only (24) generates an electromotive force, which is read through the reading port w! r
Read in (25). In the reading direction, the digital signal is read as a binary signal corresponding to A, B, C, and D, and in this case, it is a 4-digit binary signal of r0101J. In this way, it can be determined as an identification signal. Shield (2) (3
), and by increasing or decreasing the number of shields, 2'=16 binary 4-digit signals can be generated. Furthermore, by increasing the number of digits to E, F, G, etc., a large number of identification signals can be generated.

In this way, the identification card itself does not have any magnetism, and there is no effect on magnetism when it is attached to the collar (at all times other than when it is read by a reader), so problems with handling quality can be eliminated. .

In the above example, an alternating magnetic field was applied from the outside, but this was used as a DC power source for the coil (ll) (12) (13) (14
) may be used to generate a static magnetic field and detect this with a detector such as a Hall element that detects the static magnetic field. In a static magnetic field, Nfi
Since it becomes two information of S pole, more identification 4:
! can generate a number.

Further, the magnetic shields (2) and (3) may be grounded to the outside.

FIG. 3 is a diagram showing another embodiment of "Kono Hari", in which the identification card (30) is a card body (made of plastic or the like).
1) Attach the electric field shields (31) (32) to the specified positions AB.
They are placed at positions A and C of C1) and are led to terminals (34) by conductors (33). Generally shield (31) (
32) The four bodies (33) etc. are embedded in the card body (1) so that they cannot be seen from the outside. This card (30
) When an electric field is applied from the top of the shield (31) (32
) is hardly affected by the Iri electric field, so the potential at the predetermined positions of A, B, and C1D below the card (30) becomes a signal of "0101". Figure 4 shows this card (
(41) (
42) (43X44) are the charging electrodes, respectively AlBl
A voltage is applied by the i''LL power supply 5) located at the CXD position. (51X52X53) (54) is the detection side electrode and the potential of this part is read by the reading circuit. In this state, the detection electrode ( 52) (54) The potential increases due to the energizing electrodes (42) (44), but the potential does not increase due to the electric field shielding of the detection electrodes (51) and (53).This potential is read by the reading circuit (25). When expressed as a 4-digit digital signal, rolol corresponds to the predetermined positions of AlB, C, and D.
This becomes the J signal. That is, electric field shield (31) (32
) can generate a four-digit binary identification signal, and in this case, 2' = 16 different identification signals can be generated. Furthermore, A, B, C, D, E, F, G, ・n,
By changing the number of digits, 2n identification signals can be generated.

FIG. 6 shows another embodiment of the present invention at predetermined positions A and BlC.
, electric field shield at all positions D (81) (82)
(83) C34) are provided, and are connected to the terminal (34) through a ROM (read only memory) (80).

Now write to the ROM (80) to make the gate in the ROM (80) conductive and connect it to the terminal (34). This figure shows a state in which the electric field shields (81) and (83) are connected to the terminals, and a digital signal is rololJ.

A desired identification signal can be generated by writing in the ROM (80) in various ways in this way.

ROM (80) KP If you use a ROM that is easy to write to afterward, for example, a bank may write R to your identification card.
The identification code can be written using an OM writer. In addition, by using an equivalent device other than ROM, such as a transistor gate or diode gate, a large current is applied from the outside to damage the transistor, etc., and the specified electric field shield and terminal (
34) may be turned off. In this example, only the ground is connected, not completely non-contact, but since it is only the ground, almost no current flows, and there is only a slight movement of charge, the problem of poor contact is very small, and it is practically Reliability close to non-contact can be obtained.

In FIG. 2, the power source (45) may be an AC power source, and the reading circuit (25) may read changing potential.

As described above, according to this invention, the job-specific signals themselves can be exchanged without contact, and the identification card itself has no magnetism, so it is highly reliable and is not easily affected by poor contact or magnetism. This has the effect of providing a high-quality identification signal determination device.

[Brief explanation of the drawing]

Figure 1 (a) (b) I''i A perspective view and a front view of an identification card showing an embodiment of the present invention, and Figure 2 shows an embodiment of the identification card shown in Figure 1 being read by a reading device. FIG. 3 is a configuration diagram of an identification card showing another embodiment of the present invention, FIG. 4 is a configuration diagram of an embodiment in which the identification card of FIG. 3 is read by a reading device, and FIG. It is a configuration diagram of an identification card showing another embodiment of the present invention. In the figure, (1) card body, (2) (3) vital shield, (4) (30) identification card, (10) transmitter section. , (11X12X13X14 no coil, (21) (2
2) (23X24) coil, (15) AC power supply, (
20) Receiving unit, (25) reading device, (31) (32)
Electric field shield, (33) conductor, (34) terminal, (40)
Electric field generation part, (41X42X43X44) charging electrode, (
45) Power supply, (51X52X53X54) detection voltage value, (
80) Gate circuit, (82X83X84 at 81) Electric field shield In the drawings, the same reference numerals indicate the same or equivalent parts. Agent Masuo Oiwa Figure 1 (0) Figure 2 Figure 3 Figure 4 Figure U

Claims (4)

[Claims] (1) An identification card that generates an identification signal by embedding a magnetic shielding material in its main body at a desired location among a plurality of predetermined locations to shield magnetic fields from the outside at the desired location. (2) An identification card that generates an identification signal by embedding an electric field shield in its main body at a desired location among a plurality of predetermined locations and shielding an electric field from the outside at the desired location. (3) An identification card according to claim 2, characterized in that it comprises an electric field shield embedded in a desired location and a ground terminal for grounding the electric field shield to the outside. (4) A patent characterized in that the device is equipped with an electric field shield embedded in a predetermined location, a ground terminal for grounding to the outside, and a gate circuit interposed between the ground terminal and the electric field shield. An identification card according to claim 2.