JPS62559B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to improvements in memory cards used in automatic teller machines and the like.

Conventional memory cards mainly use plastic cards with magnetic tape on which unique codes are magnetically recorded, and the magnetic recording state can be easily changed by applying fine magnetic powder to the magnetic tape. This poses a serious drawback in that it is extremely easy to forge.

The present invention has the purpose of fundamentally solving such drawbacks of the conventional art, and includes a photovoltaic battery that supplies power to various parts in response to irradiation from an external light source, and a light beam that is modulated by a specific code from the outside. To provide a memory card that emits a light beam modulated by a unique code to the outside only when the memory card is tampered with, and is completely impossible to forge.

Hereinafter, details of the present invention will be explained with reference to figures showing examples.

Fig. 1 shows the structure, A is a plan view, B is an X-Y sectional view at A, and the upper surface of case 1 has
Light-receiving elements LR such as photovoltaic cells LS and light-receiving transistors
A light emitting element LT such as a light emitting diode is disposed in an exposed manner, and the case 1 and the back cover 2 are secured to each other by a screw 5 passing through a collar 3 and a printed circuit board 4.

Also, inside the case 1 and on the top surface of the printed circuit board 4, there are a photovoltaic cell LS, a light receiving element LR, and a light emitting element.
The LT, an integrated circuit component 6, etc. are mounted, and an input terminal IN, which will be described later, is installed.

Note that when the memory card is handed over to the user, the head of the screw 5 is sealed with a sealing material 7, making it impossible to manipulate the inside without permission.

FIG. 2 is a block diagram showing the circuit configuration.
A photovoltaic battery LS is provided that generates power using the irradiated light Le from an external light source and supplies power E to each part, and a light receiving element LR that receives the light beam Li modulated by a specific code given from the outside is provided. The output of this is subjected to predetermined processing by the receiver RC and then given to the controller CT, and in response to the reception of the light beam Li, the controller CT decodes a specific code, which is predetermined. If it is, the unique code from the code generator CG using memory etc. is given to the transmitter TC, the transmitter TC drives the light emitting element LT, and the light beam Lo modulated by the unique code is sent to the outside. It has become something that radiates.

For this reason, a light source such as a lamp is provided inside the memory card insertion slot, facing the photovoltaic cell LS, and a light emitting part and a light receiving part are provided facing the light receiving element LR and light emitting element LT. When a light beam Li modulated by a specific code is emitted, each part of the memory card operates in response to the irradiation from a light source such as a lamp, receives the light beam Li, and emits the light beam Lo, which is received by the light receiving part. By doing this, it is possible to obtain the unique code unique to the memory card.

Note that the input terminal IN is used when storing the unique code into the code generation section CG before sealing with the sealing material 7.

In addition, the receiver RC uses an amplifier, a waveform shaping circuit, etc., the controller CT uses a microprocessor or a combination of various logic circuits, and the transmitter TC uses the following:
A drive circuit or the like corresponding to the light emitting element LT is used.

However, as the code generating section CG, in addition to using a non-volatile memory, a circuit that generates a unique code using a switch or a strap between terminals may also be used.

Therefore, it is not necessary to install a dry battery etc. inside the memory card, and since no contact terminal etc. is used for power supply from the outside, high operational reliability is obtained, and at the same time, it is possible to use a specific code. Unless the modulated light beam Li is given, the light beam Lo modulated by the unique code will not be emitted, making it impossible to obtain the unique code by any other means, and counterfeiting of memory cards is completely prevented. Ru.

However, the external shape and dimensions may be determined according to the conditions, and the circuit configuration may also be determined depending on the receiving section.
The same effect can be achieved even if the RC and the transmitting section TC are integrated with the control section CT, and the present invention can be freely modified in various ways.

As is clear from the above explanation, according to the present invention, a highly reliable memory card that is absolutely impossible to counterfeit is realized, so crimes related to automatic teller machines, etc. are prevented from occurring, and banks Significant effects can be obtained in terms of labor saving in work, etc.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention; FIG. 1A is a plan view, FIG. 1B is an X-Y sectional view taken along line A, and FIG. LS...Photovoltaic cell, CG...Code generator, CT
...Control unit, LR...Light receiving element, LT...Light emitting element.

Claims (1)

[Claims] 1. A photovoltaic battery that supplies power to each part in response to irradiation from an external light source, a code generator that generates a unique code, a light receiving element that receives light modulated by a specific code from the outside, and a light receiving element that receives light modulated by a specific code from the outside. a control unit that sends out a unique code from the code generation unit in accordance with the specific code indicated by the output; and a control unit that emits a light beam modulated by the unique code to the outside in accordance with the output of the control unit. A memory card characterized by comprising a light emitting element.