KR20070109450A - A smart card - Google Patents

Abstract

A smart card is provided to maximize the competitive force of the smart card by increasing the convenience for the smart card by easily checking the information of the smart card. A smart card includes a circuit board(13). The circuit board includes an RF(Radio Frequency) chip(20), an RF antenna(30), a display part(40), a capacitor(60) and a controller(70). The RF chip includes a CPU(Central Process Unit), a memories, an RF(Radio Frequency) module, and a power supply. The RF module performs conversion between an RF signal and a digital signal. The RF antenna performs communication with a terminal of the smart card. The display part displays data stored in the RF chip. The capacitor supplies the circuit board with power. The controller controls the RF chip, the RF antenna, the display part, and the capacitor.

Description

Smart card {A smart card}

1 is a perspective view illustrating an embodiment of the present invention,

2 is an exploded perspective view illustrating an embodiment of the present invention;

3 is a block diagram of a circuit board illustrating one embodiment of the present invention;

4 is a block diagram of a control device illustrating an embodiment of the present invention;

5 is a circuit diagram of an RF AC / DC rectifier illustrating an embodiment of the present invention;

6 is a circuit diagram of a charge control circuit illustrating an embodiment of the present invention.

Explanation of symbols on the main parts of the drawings

10: smart card 11, 12: upper and lower printing layer

13: circuit board 20: RF chip

30: RF antenna 40: display unit

50: keypad 60: storage battery

70: control unit 71: live part

72: RF / digital modulator 73: data selector

74: display interface unit 75: keypad interface unit

The present invention relates to an RF smart card widely used as an electronic money card, and more specifically, a display function, an input function, and a power charging function are added to the smart card so that the user can easily check the information of the smart card. To one invention.

In general, the existing real money has problems such as inconvenience of transaction, inconvenience of carrying, and cost of making money. Electronic money is a currency composed of digital data in order to play the role of a banknote in a virtual space of a digital society based on digital data. More specifically, electronic money refers to goods that can be traded through a network such as the Internet or a communication network.

In addition, electronic money includes network type electronic money and card type electronic money, of which card type electronic money can be implemented more safely through smart cards, and is expected to be deployed in this direction in the future. Smart cards are generally defined as plastic cards the size of a credit card with an integrated circuit chip that has the ability to handle a particular transaction by having a microprocessor, card operating system, security module, and memory in a dictionary. Such smart cards are classified into contact cards, contactless cards, and mixed cards according to data reading methods.

The contact card refers to an interface device, that is, a card in which the contact of the card is activated by contacting the contact of the interface device when the card is inserted into the terminal. The contactless card is an arithmetic element and a memory element necessary for an information processing function. Is the same as the contact card, but the power supply for driving the chip in the card is made through the electromagnetic coupling of the coil in the card, and means a type of card using the electromagnetic induction method for communication with the interface device.

In addition, the mixed card is a type of card supporting both types of contact card and contactless card. There are a Combi card and a Hybrid card. The cards have in common that they support both contact and contactless, but the structures are somewhat different.

That is, the combination card is a card that shares the parts that can be shared by the contact / contactless card in one card, and can bring the integration effect of heterogeneous applications through internal resource sharing. In a hybrid card, a contact card and a contactless card are physically separated from each other in a single card.

The card-type electronic money described above can be used as a cash substitute, and its application field is expected to be widened due to its ease of use, but despite the similarity with cash, the user could not easily check the balance. This may give distrust to the electronic money system, and if it is implemented in postpayment, it may lead to excessive consumption without knowing the usage history. If you can not use it may occur.

The present invention was devised in view of the above problems, and its purpose is to add a display function, an input function, and a power charging function to the smart card so that the user can easily check the information of the smart card, such as the amount used and the remaining amount. It is to provide a smart card that can increase the convenience of.

Features of the present invention for achieving the above object, the circuit board 13 is formed between the upper and lower printed layers (11, 12), the circuit board 13, the CPU for processing processing, data and program storage Volatile and nonvolatile memory, an RF module for converting between RF signals and digital signals, and an RF chip 20 including a power supply unit for generating a driving power in the RF signal, and an RF antenna for communicating with a smart card terminal ( 30, a display unit 40 for displaying data stored in the RF chip 20 to the outside, a storage battery 60 for supplying power to the circuit board 13, and a power supply signal from a transmission signal of the smart card terminal. A charging unit 71 generating a charge key to the battery 60 and converting an RF radio signal into a digital signal 72, a display unit among data stored in the converted digital signal or the RF chip 20. Day 40 to select data for display In the smart card (10) consisting of a control device (70) having a data selector (73) and a display interface (74) for outputting display data to the display (40), the circuit board (13) has a display unit. A keypad unit 50 for selecting data for displaying 40 is provided, and a keypad interface unit 75 for inputting a signal input to the keypad unit 50 to the data selection unit 73 is the control device. The charging unit 71 is provided at 70, and controls the state of charge of the RF AC / DC rectifier 711 and the storage battery 60 to rectify power from the RF radio signal flowing through the RF antenna 30. It can be achieved by a smart card, characterized in that consisting of a charge control circuit 712 for generating and outputting a signal.

Hereinafter, described in detail by the accompanying drawings a preferred embodiment for achieving the above object is as follows.

As shown in FIG. 1 to FIG. 6, in the present invention, the circuit board 13 is stacked on the lower printed layer 12, and the upper printed layer 11 is stacked on the circuit board 13, thereby providing a smart card 10. Is formed.

The circuit board 13 of the smart card 10 includes an RF chip 20, an RF antenna 30, a display unit 40, a keypad unit 50, a storage battery 60, and a control device 70. have.

The RF chip 20 is composed of a CPU for operation processing, a volatile and nonvolatile memory for storing data and programs, an RF module for converting between RF signals and digital signals, and a power supply unit for generating driving power from the RF signals. .

The RF antenna 30 is connected to the RF chip 20 and the control device 70, and performs information exchange of the smart card 10 in communication with the card terminal.

The display unit 40 displays the data selected by the keypad unit 50 from the data stored in the RF chip 20 to the outside.

The keypad 50 selects data for display on the display 40.

The battery 60 supplies power to the display unit 40, the keypad unit 50, and the control unit 70 in the smart card 10.

The control device 70 controls and controls all functions of the smart card 10, and generates a power source from the output signal of the smart card terminal to charge the battery unit 60, and the RF of the smart card terminal An RF / digital modulator 72 for converting a radio signal into a digital signal and a data selector 73 for selecting data for displaying the display unit 40 among the converted digital signals or data stored in the RF chip 20. And a display interface unit 74 for outputting the display data to the display unit 40, and a keypad interface unit 75 for inputting a signal input to the keypad unit 50 to the data selection unit 73. have.

The charging unit 71 checks the charging state of the RF AC / DC rectifier 711 for rectifying power from the RF wireless signal flowing through the RF antenna 30 and the storage battery 60 to generate and output a control signal. Circuit 712, the configuration and operation of the RF / digital modulator 72 is the same configuration as the RF module of the RF chip 20, the RF / digital modulator 72 is a smart card terminal The RF radio transmission signal is received from the RF antenna 30 and modulated into a digital signal. The control device 70 preferably consists of one chip and is mounted separately from the RF chip 20 in the smart card 10.

The data selector 73 selects data selected from the keypad 50 from among digital signals converted from the RF / digital modulator 72 or data stored in the RF chip 20 and sends the selected data to the display 40. Play a role.

The display interface 74 outputs the selected data received from the data selector 73 through the display 40.

The keypad interface unit 75 inputs a signal input to the keypad unit 50 to the data selector 73 to select data from the data selector 73.

The charging unit 71 is for charging the battery 60 using the output signal of the smart card terminal received through the RF antenna 30, the battery 60 is a smart card 10 alone smart card 10 Saves the power supply to use when displaying information.

The charging unit 71 charges the battery 60 in the active area of the terminal, and when the smart card 10 is removed from the active area, the battery 60 supplies power for displaying its own data of the smart card 10. do.

In the RF AC / DC rectifier 711 of the charging unit 71, a resistor R1 and a capacitor C1 are connected in series to the RF antenna 30, and the diodes D1 and D3 and D2 connected in series. (D4) is connected in parallel, one side of the resistor (R1) is connected between the diode (D1) (D3), one side of the capacitor (C1) is connected between the diode (D2) (D4), the diode (D1) The capacitor C2 is connected in parallel to the D3, D2, and D4, and the inductor L2 is connected to the rear of the capacitor C2.

In the charge control circuit 712 of the charging unit 71, a voltage comparator V and a current comparator A are connected to the gate G.

The display unit 40 includes a thin film liquid crystal display (TFT-LCD), an electronic paper display (e-paper LCD), or a plastic flexible display.

Referring to the operation of the present invention made of the above-described configuration as follows.

That is, when the smart card 10 of the present invention contacts the smart card terminal and the RF wireless signal is transmitted to the smart card terminal, the control device 70 cuts off the power applied from the battery 60 to the smart card 10. Power is generated from the RF radio signal flowing through the RF antenna 30 through the charging unit 71 of the controller 70 and charged in the storage battery 60.

Here, to generate power from the RF radio signal flowing through the RF antenna 30 through the charging unit 71 and charge the battery 60, the resistor R1 and the capacitor C1 of the RF AC / DC rectifier 711 and The radio waves are rectified by using four diodes D1, D3, D2, and D4, and are converted into direct current, and then filtered by the capacitor C2 and the inductor L2 to be charged in the storage battery 60.

In addition, the charging control circuit 712 of the charging unit 71 detects the information indicating the state of charge of the battery 60 to control the charging mode, the current flowing through the RF AC / DC rectifier 711 (Ibb) ) And the voltage Vbb across the storage battery 60 and the current mode through the gate G in comparison with the reference voltage Vr and the reference current Ir through the voltage comparator V and the current comparator I. Alternatively, it is determined whether to control in one of the voltage modes to generate and output a control signal.

At the same time, the RF chip 20 sends information to and from the smart card terminal and the RF wireless signal to each other and sends the information to and from the data selector 73 of the control device 70. The data selector 73 selects and outputs data through the display interface 74 and the display 40.

At this time, the smart card 10 is driven by the power generated from the power supply of the RF chip 20.

On the other hand, in order to check the information of the smart card 10 itself, the user inputs the desired information through the keypad unit 50, the input signal of the keypad unit 50 via the keypad interface unit 75, the data selection unit 73 ), The data selector 73 selects the information desired by the user from the information stored in the RF chip 20, and outputs the information desired by the user through the display interface 74 and the display 40. do.

At this time, the driving power of the smart card 10 is supplied by the storage battery 60, the power is supplied from the moment when the keypad 50 is touched.

Although the preferred embodiments of the present invention have been illustrated and described above, the present invention is not limited to the above-described embodiments, and the present invention is not limited to the above-described embodiments without departing from the spirit of the present invention as claimed in the claims. Various modifications can be made by those skilled in the art, and such modifications are intended to fall within the scope of the appended claims.

The present invention as described above, the display function, the input function and the power charging function is added to the smart card 10 to display various information of the smart card, such as the amount of money used by the user, the remaining amount, etc. easily through the display unit. Because it can be confirmed by the ease of use is enhanced and the advantage of being able to increase the external competitiveness of the smart card as much as possible.

Claims (3)

A circuit board 13 is formed between the upper and lower printed layers 11 and 12, and the circuit board 13 includes a CPU for arithmetic processing, volatile and nonvolatile memory for storing data and programs, and an RF signal and a digital signal. RF chip 20 consisting of a power supply unit for generating a driving power from the RF module and RF signal to perform the conversion, the RF antenna 30 to communicate with the smart card terminal, and the data stored in the RF chip 20 The display unit 40 for displaying to the outside, the storage battery 60 for supplying power to the circuit board 13, the charging unit for generating a charge from the output signal of the smart card terminal to charge the storage battery ( 71), the RF / digital modulator 72 for converting the RF radio signal into a digital signal, the data selection for selecting the data for display to the display unit 40 of the converted digital signal or data stored in the RF chip 20 Display unit 73 and display data In the smart card 10 consisting of a control device 70 having a display interface unit 74 outputs through the unit 40, The circuit board 13 includes a keypad 50 for selecting data for displaying the display 40 and a keypad for inputting a signal input to the keypad 50 to the data selector 73. An interface unit 75 is provided in the control device 70, and the charging unit 71 includes an RF AC / DC rectifier 711 and a storage battery 60 that rectify power from an RF wireless signal flowing through the RF antenna 30. Smart card, characterized in that consisting of a charge control circuit 712 for generating and outputting a control signal by checking the state of charge. The method of claim 1, In the RF AC / DC rectifier 711 of the charging unit 71, a resistor R1 and a capacitor C1 are connected in series to the RF antenna 30, and the diodes D1 and D3 and D2 connected in series. (D4) is connected in parallel, one side of the resistor (R1) is connected between the diode (D1) (D3), one side of the capacitor (C1) is connected between the diode (D2) (D4), the diode ( Smart card, characterized in that the capacitor (C2) is connected in parallel to the D1) (D3) (D2) (D4), the inductor (L2) is connected behind the capacitor (C2). The method of claim 1, The display unit 40 is a smart card, characterized in that any one of a thin film liquid crystal display (TFT-LCD), an electronic paper display (e-paper LCD) or a plastic flexible display.

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