JPS6312080A - Information card - Google Patents

Abstract

PURPOSE:To prevent the defect of contacting with an external device, the malfunction due to a leak current, the destruction of circuits due to static electricity or an external voltage, etc., by inputting a supply power and inputting and outputting signals through a magnetic coupling coil and an electric signal/transmission signal converter which are not exposed to the outside. CONSTITUTION:A magnetic coupling coil 22 which inputs the power on which a signal is superposed by magnetic coupling, a demodulating circuit 24 which demodulates only an electric signal of the output of this magnetic coupling coil, a memory 26 where information is stored, a memory control circuit 25 which controls the operation of the memory based on the output of the demodulating circuit, an electric signal/ transmission signal converter 27 which converts the output of the memory control circuit to a transmission signal and sends it, and a power supply circuit 23 to which the output of the magnetic coupling coil is inputted to supply the supply power to the demodulating circuit, the memory control circuit, the memory, and the electric signal/transmission signal converter are stored in a card body 21. The signal and the power are supplied as a magnetic energy to the magnetic coupling coil from an external device 10, and the electric signal/transmission signal converter outputs the signal as an optical signal or the like. Thus, trouble and malfunction due to the leak current are prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention is applicable to office automation (Offias
Automation, OA), 77 Factory Automat
Information cards such as IC cards used in fields such as ion, FA), etc., especially non-contact type magnetic coupling power supply/reception without power supply (no built-in battery) that does not have contact type terminals for input/output of power and signals.・Related to information cards using a contactless transmission method.

(Prior Art) A general information card has an integrated circuit such as a semiconductor memory built into a card body made of plastic or the like.

A contact terminal with an external device is provided on the card surface.

Conventionally, technologies in this field include ■Nikkei Mechanical, (1985-10-21) Nikkei McGraw-Hill Co., Ltd.
C card JP, 1f37-170, ■Nikkei Electronics, (11385-12-2) Nikkei McGraw-Hill Electronics manufacturers pouring into the RRC card market (top) JP, 275-292, ■Nikkei Electronics (1!385-12) -8) Electronics Manufacturers Floating into the Nikkei McGraw-Hill IC Card Market (Part 2)'' P, 249-282. The configuration will be explained below using figures.

FIG. 2 is a block diagram showing an example of the configuration of a conventional information card, and FIG. 3 is a perspective view showing an embodiment thereof.

In FIG. 2, l is an external device for reading and writing information, and 2 is an information card. Direct current power supplies VC and E are supplied from the external device l to the information card 2, and the external device ll and Person between information card 2, output signal engineer 1
01 to l10n are exchanged.

As shown in FIGS. 2 and 3, the information card 2 has a rectangular card body 3 made of plastic or the like, and the card body 3 has a plurality of power and signal ports exposed on its surface. A contact terminal 4 is provided, and an electronic integrated circuit (hereinafter referred to as IC) 5 is provided inside. The IC 5 includes a semiconductor memory 6 and a microprocessor 7 that controls writing and reading of information to and from the memory 6.
It has

When this type of information card 2 is inserted into the external device 1, the terminals 4 on the card 2 side come into contact with the terminals on the external device 1 side, and the information stored in the memory 6 is transferred to the external bag through these terminals 4 etc. fit, or write information on the external bag Nl side into the memory 6.

(Problems to be Solved by the Invention) However, in the information card having the above configuration, since the terminal 4 is exposed to the outside, contact failure due to dirt, oxidation, corrosion, abrasion, etc. of the terminal contact portion, and leakage current may occur. In addition, the IC5 was destroyed due to static electricity and external voltage, resulting in reliability problems.

The present invention provides an information card that solves the problem of low reliability that the prior art had.

(Means for Solving the Problems) In order to solve the above problems, the present invention provides information reading,
Alternatively, in an information card that performs reading and writing, a magnetic coupling coil that inputs power with a superimposed signal by magnetic coupling, a demodulation circuit that demodulates only an electric signal from the output of this magnetic coupling coil, and a memory that stores information. , a memory control circuit that controls the operation of the memory based on the output of the demodulation circuit, an electric signal/transmission signal converter that converts the output of the memory control circuit into a transmission signal and sends it out, and an output of the magnetic coupling coil. the demodulation circuit by inputting
A memory control circuit, a memory, and a power supply circuit that supplies power to an electrical signal/transmission signal converter are housed within the card body.

(Function) According to the present invention, since the information card is configured as described above, the magnetic coupling coil receives signals and power in the form of magnetic energy from the external device, and the electrical signal/transmission signal converter receives the supply of signal and power from the external device. It functions to output signals in the form of signals, etc. Further, the power supply circuit works to supply the electric power given through the magnetic coupling coil to the internal circuit, so that signals can be sent and received without a power supply and without contact. Therefore, the above-mentioned problem can be eliminated.

(Embodiment) FIG. 1 is a schematic diagram of an information card showing an embodiment of the present invention.

In FIG. 1, 10 is an external device, and an information card 20 is inserted into this external device 10.

External equipment #1110 includes a modulation circuit 11 that converts the input signal S1 into a transmission signal, an amplifier circuit 12 that amplifies the transmission signal, a magnetic coupling coil 13 that outputs the output of the amplifier circuit 12 as magnetic energy, and an optical It is provided with a transmission signal/electrical signal converter (X/E) that converts a transmission signal Sx such as a signal into an electrical signal and sends out an output signal So.

On the other hand, the information card 20 has a substantially rectangular card body 21 made of plastic or the like.
A magnetic coupling coil 22, a power supply circuit 23, a demodulation circuit 24, a memory control circuit 25, a memory 26, and an electric signal/transmission signal converter (E/X) 27 are provided inside.

Here, the coil 22 is a coil that is magnetically coupled to the coil 13 on the external device 10 side and provides electrical energy given from the coil 13 to the power supply circuit 23 and the demodulation circuit 24. This coil 22 and the coil 13 constitute a magnetic transmission system for transmitting power and signals. The power supply circuit 23 is a circuit that converts the output of the coil 22 into a stabilized DC voltage Vdc and supplies it to each circuit in the card body 21 as a power supply voltage.

The demodulation circuit 24 is a circuit that demodulates only the electrical signal from the output of the coil 22 and supplies it to the memory control circuit 25.

The memory control circuit 25 is, for example, a central processing unit (CPU).
and a microprocessor having functions such as an input/output device, inputs the output signal of the demodulation circuit 24, and inputs the output signal of the demodulation circuit 24 to the memory 2.
This is a circuit that performs reading and writing control, etc. of 5. Memory 2B is a circuit that stores various information, and includes read-only memory (ROM) and writable ROM (PRON).
, electrically erasable and programmable ROM (EEFROM), and ultraviolet erasable and programmable RO (EFROM). In addition, an electric signal/transmission signal converter 27
is a circuit that converts the output signal of the memory control circuit 25 into a transmission signal such as an optical signal and sends it to the transmission signal/electrical signal converter 14 on the external device 10 side. Each circuit in the card body 21 includes an IC, an optoelectronic integrated circuit (hereinafter referred to as
0EIG), etc.

Next, the operation will be explained.

The input signal S+ at the external device IO is the information card 20
Initial settings of the memory control circuit 24 on the side, control signals for reading and writing information, signals to be written to the memory 26, etc. are serialized.

When the information card 20 is inserted into such an external device IO, the input signal SI on the external device 10 side is converted into a transmission signal by the modulation circuit 11, amplified by the amplifier circuit 12, and then magnetically coupled by the coil 13.22. The signal is supplied to the power supply circuit 23 and demodulation circuit 24 on the information card 20 side.

The power supply circuit 23 converts the output of the coil 22 into a stabilized DC voltage Vdc, and then supplies the voltage to each circuit within the card body 21 as power. On the other hand, the demodulation circuit 24 demodulates only the electrical signal from the output of the coil 22 and supplies it to the memory control circuit 25 . Then, the memory control circuit 25 specifies an address based on the information contained in the input signal, for example, the read information, and reads the stored information from the memory 2B. It is converted into a predetermined transmission signal Sx, and sent to the transmission signal/electrical signal converter 14 on the external device 1110 side.

The transmission signal/electrical signal converter 14 converts the input transmission signal into an electric signal, and outputs an output signal S which serializes the readout information of the memory 2B, the operation confirmation signal inside the information card, etc.
Send O.

4 to 18 show the specific configuration of the information card shown in FIG. (ii) Figures 7 to 9 are information cards for the magnetic coupling power supply/reception/magnetic coupling transmission method; (iii) Figures 10 to 12 are information cards for the magnetic coupling power supply/reception/ultrasonic transmission method; (i-ma)
Figures 13 to 15 are information cards for magnetic coupling power feeding, reception, and ultrasonic transmission methods.

(Ma) Figures 18 to 18 show information cards of magnetic coupling power feeding/receiving/capacitive coupling transmission system, and their configurations will be explained below.

(i) Information card of magnetic coupling power feeding/receiving combined optical transmission system shown in FIGS. 4 to 6 FIG. 4 is a circuit configuration block diagram. In this circuit, a transmission signal/electrical signal converter 14 on the external device 10 side includes a lens 14-1 for receiving optical signals OPT, a light receiving element 14-2, such as a photodiode, etc. and a light receiving amplification circuit 14-3.

Electrical signal on the information card 20 side corresponding to the external device 10/
The transmission signal converter 27 includes a light emitting element drive circuit 27-1 and a light emitting element 27-2 for generating an optical signal OPT, which is made of a light emitting diode or the like. These circuits 27-1
．． The power supply circuit 23, demodulation circuit 24, memory control circuit 25, and memory 26 including 27-2 are, for example, OE[28-
It consists of 1.

FIG. 5 is a perspective view showing an example of mounting the information card 20 in FIG. 4, and FIG. 6 is a perspective view showing an example of mounting the information card 20 in FIG.
It is a perspective view which shows the example of a structure of C28-1.

The card body 21, which is made of plastic or the like and which accommodates the 0EIC 28-1 and the coil 22, has a structure in which a light beam can pass through the passage of the optical signal OPT by making a hole or providing a transparent film.

Regarding the above configuration, when the memory control circuit 25 writes information to, for example, the memory 2B and provides the write confirmation signal to the drive circuit 27-1, the drive circuit 27-1 drives the light emitting element 2
7-2 to emit light to convert the write confirmation signal into an optical signal OPT and send it to the lens 14-1 on the external device 10 side. The optical signal OPT passing through the lens 14-1 is transmitted to the light receiving element 14-2.
The signal is converted into an electrical signal by the amplifier circuit 14-3, and then output in the form of an output signal S0.

(ii) Information card of the magnetic coupling transmission method shown in FIGS. 7 to 9. FIG. 7 is a block diagram of the circuit configuration. In this circuit, the transmission signal/electrical signal converter 14 on the external device 10 side includes a magnetic coupling coil 14-11 and a demodulation circuit 14-12 that demodulates the transmission signal. Further, the electric signal/transmission signal converter 27 on the information card side includes a modulation circuit 27-11 that converts the output of the memory control circuit 25 into a transmission signal.
, amplifier circuit 27-12, and magnetic coupling coil 27-
It consists of 3. A power supply circuit 23 and a demodulation circuit 24 including these modulation circuits 27-11 and amplifier circuits 27-12.
, the memory control circuit 25, and the memory 26 are 1G28-
It consists of 2.

8 is a perspective view showing an example of mounting the information card 20 in FIG. 7, and FIG. 9 is a coil 22, 27-3 in FIG. 8.
FIG. 3 is a perspective view showing an example of the configuration of IC 28-2.

In the above configuration, the output of the memory control circuit 25 is modulated by the modulation circuit 27-11, amplified by the amplifier circuit 27-12, and then magnetically coupled by the coil 27-3, 14-11 to the external device 10 side. sent to. Then, coil 1
The output of 4-11 is demodulated by a demodulation circuit 14-12 and sent out as an output signal So.

(iii) Magnetic coupling power receiving in Figures 10 to 12
Ultrasonic transmission type information card FIG. 10 is a circuit configuration block diagram. In this circuit,
The transmission signal/electrical signal converter 14 on the external device IO side includes an ultrasonic receiving element 14-21 consisting of an electrostrictive transducer or the like that receives the ultrasonic signal S, and a demodulation circuit 14-22 that demodulates the transmission signal. It is configured. Further, the electrical signal/transmission signal converter 27 on the information card 20 side is connected to the memory control circuit 2
Modulation circuit 27-21 that converts the output of No. 5 into a transmission signal.
, an ultrasonic generating element drive circuit 27-22, and an ultrasonic generating element 27 for generating an ultrasonic signal S, which includes an electrostrictive vibrator and the like.
-23. These circuits 27-21.2
The power supply circuit 23 including 7-22, the demodulation circuit 24, the memory control circuit 25, and the memory 2B are configured by [:28-3.

FIG. 11 is a perspective view showing an example of mounting the information card 20 in FIG. 10, and FIG. 12 is a 1028-3 in FIG.
, is a perspective view showing a configuration example of a coil 22 and an ultrasonic wave generating element 27-23. The card body 21 that houses the IC 28-3 and the like has a hole for the passage of the ultrasonic signal S, or is made of a material through which the ultrasonic signal can pass.

In the above configuration, the output of the memory control circuit 25 is modulated by the modulation circuit 27-21, converted into an ultrasound signal S by the drive circuit 27-22 and the ultrasound generation element 27-23, and transmitted to the external device 10 by the ultrasound signal S. The signal is sent to the receiving element 14-21.

Then, it is converted into an electrical signal by the ultrasonic receiving element 14-21, and the signal is demodulated by the demodulation circuit 14-22 and output in the form of an output signal S0.

(i-ma) Information card of magnetic coupling power supply/reception/ultrasonic transmission method shown in Fig. 13 to Fig. 15 Fig. 13 is a circuit configuration block diagram, and Fig. 14 is a slide showing an example of implementation of the information card in Fig. 13. View.

FIG. 15 is a perspective view showing an example of the main part configuration of FIG. 14.

In this circuit, all the circuits in the information card 20 shown in FIG. 1O are composed of ICs 28-4 except for the coil 22.

(V) Information card of magnetic coupling power supply/reception/capacitive coupling transmission method shown in Figs. 18 to 18 Fig. 16 is a circuit configuration block diagram, and Fig. 17 is a perspective view showing an example of mounting the information card in Fig. 16. , FIG. 18 is a perspective view showing an example of the main part configuration of FIG. 17.

In this circuit, the transmissibility t'//electrical signal converter 14 on the external device IO side is composed of a capacitive coupling plate 14-41 and a demodulation circuit 14-42 for demodulating the transmission signal, and Pole plate 15 for retrace in the transmission system of the output signal So
is provided. Further, the electrical signal/transmission signal converter 27 on the information card 20 side includes a modulation circuit 27-41 that converts the output of the memory control circuit 25 into a transmission signal, an amplifier circuit 27-42, a polar plate 14-41, and a capacitor. A return wire electrode plate 29 is provided, which is composed of coupling electrode plates 27 to 43 and is capacitively coupled to the electrode plate 15. The entire circuit of these information cards 20 consists of a coil 22 and a pole plate 27-43.2.
Except for 9, it is composed of IC2B-5.

In this circuit, the output of the memory control circuit 25 is converted into a capacitively coupled electric signal/transmission signal conversion amount 27 and a transmission signal/transmission signal.
The signal is transmitted to the external device 10 through the electrical signal converter 14.

Each of the above embodiments has the following advantages.

■ The internal circuit terminals are not exposed to the outside as in the past,
Since power can be supplied and output without contact, there is no contact failure caused by dirt, oxidation, corrosion, friction, etc. on the terminal contact parts as in the past, and there is no risk of failure due to leakage current. Not only is there no malfunction, there is no need to protect internal circuits from external voltage or static electricity. Therefore, high reliability can be obtained.

■ Completely sealed structure improves explosion-proof and waterproof properties. Therefore, in addition to normal 0AII equipment and FA equipment, it can also be applied to equipment in harsh environments or in places that require explosion-proof measures.

■ Improved usability as there is no need to replace batteries.

Note that the present invention is not limited to the illustrated embodiment, and can be modified in various ways.For example, the signal output system may be configured using other transmission methods such as radio wave transmission, or each circuit within the card body 21 may be configured. It is also possible to configure it with other circuits.

(Effects of the Invention) As described above in detail, according to the present invention, power input, signal output, and input are performed through a magnetic coupling coil that is not exposed to the outside and an electric signal/transmission signal converter. Therefore, poor contact with external devices, malfunctions due to leakage current, destruction of internal circuits due to static electricity or external voltage, etc. can be prevented, and reliability is improved. Furthermore, since it has a completely sealed structure, it is explosion-proof and waterproof, and it is expected that there will be no need to replace batteries.

[Brief explanation of the drawing]

FIG. 1 is a schematic configuration diagram of an information card showing an embodiment of the present invention, FIG. 2 is a configuration block diagram of a conventional information card, FIG. 3 is a perspective view showing an implementation example of FIG. 2, and FIG. A configuration block diagram of an information card using a magnetic coupling power feeding/receiving/optical transmission system embodying FIG. 1, FIG. 5 is a perspective view showing an implementation example of the information card shown in FIG. 4, and FIG. A perspective view showing the main part configuration diagram, Figure 7 is a magnetic coupling power supply system that embodies Figure 1.
8 is a perspective view showing an example of the implementation of the information card in FIG. 7; FIG. 9 is a perspective view showing an example of the main part configuration in FIG. 8; 1
Figure 0 is a block diagram of the configuration of an information card for the magnetic coupling power supply/reception/ultrasonic transmission method that embodies Figure 1.
The figure is a perspective view showing an example of mounting the information card in Figure 10.
Figure 2 is a perspective view showing an example of the configuration of the main parts in Figure 11, Figure 13 is a block diagram of the configuration of an information card with a magnetic coupling power feeding/receiving/ultrasonic transmission system that embodies Figure 1, and Figure 14 is a block diagram showing the configuration of an information card using the magnetic coupling power feeding/receiving/ultrasonic transmission system. Fig. 13 is a perspective view showing an example of the information card implementation, Fig. 15 is a perspective view showing an example of the main part configuration of Fig. 14, and Fig. 18 is a magnetic coupling power supply/reception/capacitive coupling transmission embodying Fig. 1. The configuration block diagram of the information card of the system, Fig. 17 is the same as Fig. 16.
Figure 18 is a perspective view showing an example of mounting the information card shown in Figure 1.
FIG. 8 is a perspective view showing an example of the main part configuration of FIG. 7; lO...External device, 11...Modulation circuit, 12...Amplification circuit, 13.22...
Magnetic coupling coil, 14...Transmission signal/electrical signal converter, 20...Information card, 21...
・Card body, 23... Power supply circuit, 24...
... Demodulation circuit, 25 ... Memory control circuit %2
B... Memory, 27... Electric signal/transmission signal converter, 28-1... Optoelectronic integrated circuit (
OEIC), 28-2 to 28-5... Electronic integrated circuit (IC). Applicant's representative: Kyo Kakimoto Schematic configuration diagram of the information card of the present invention Fig. 1 Fig. 2 Fig. 2 A perspective view of the implementation example of Fig. 3 Fig. 3 Koushichi Shinto Method I
Lol! i-Card Figure 4 Figure 7 An example of a great girl with a good news card Figure 9 Figure 10 Figure 0 An example of a friend with a good news card Figure 11 Figure 1 An exhilarating person and a receptionist Ultra-smoothing differential signal type L electricity dissipation U human Fig. 13 Marks Fig. 13 Information card implementation example Fig. 14 Example of main part configuration of Fig. 4 Fig. 15 Fig. 1 Fig. 8 Figure 16: Implementation example of the report card in Figure 6 Figure 17

Claims (1)

[Claims] 1. A magnetic coupling coil that inputs power on which a signal is superimposed by magnetic coupling; a demodulation circuit that demodulates only an electric signal from the output of the magnetic coupling coil; a memory that stores information; a memory control circuit that controls the operation of the memory based on the output of the demodulation circuit; an electric signal/transmission signal converter that converts the output of the memory control circuit into a transfer signal and sends it out; and an input of the output of the magnetic coupling coil. An information card comprising: a power supply circuit that supplies power to the demodulation circuit, the memory control circuit, the memory, and the electric signal/transmission signal converter in a card body. 2. The information card according to claim 1, wherein the demodulation circuit, power supply circuit, memory control circuit, memory, and electrical signal/transmission signal converter are constructed from an integrated circuit. 3. The electric signal/transmission signal converter is configured with a light emitting element drive circuit and a light emitting element, and the power supply circuit including these;
2. The information card according to claim 1, wherein the demodulation circuit, the memory control circuit, and the memory are constructed of optoelectronic integrated circuits. 4. The electric signal/transmission signal converter is configured with a modulation circuit, an amplification circuit, and a magnetic coupling coil, and the power supply circuit, demodulation circuit, memory control circuit, and memory including the modulation circuit and amplification circuit are integrated circuits. Structured Claim No. 1
Information card listed in section. 5. The electrical signal/transmission signal converter is composed of a modulation circuit, an ultrasonic generation element drive circuit, and an ultrasonic generation element, and includes the modulation circuit and the ultrasonic generation element drive circuit, and the power supply circuit, demodulation circuit, The information card according to claim 1, wherein the memory control circuit and the memory are constructed from an integrated circuit. 6. The electric signal/transmission signal converter is composed of a modulation circuit, an amplifier circuit, and a plate for capacitive coupling, and the power supply circuit, demodulation circuit, memory control circuit, and memory are integrated including the modulation circuit and the amplifier circuit. Claim 1 consisting of a circuit
Information card listed in section. 7. The information card according to claim 5, wherein the power supply circuit, demodulation circuit, memory control circuit, memory, and electrical signal/transmission signal converter are constructed from an integrated circuit.