KR20090013493A - Rfid keyboard system comprising a plurality of rfid device - Google Patents

Abstract

An RFID keyboard system is provided to facilitate keeping and carrying by using a soluble film as a separate power source is unnecessary and RFID device is small with having advantage of a radio keyboard. An RFID keyboard(10) includes a plurality of RFID keys having different RFID identification codes. An RFID receiver(12) receives the information of the RFID key. An RFID reader(122) includes a radio antenna and communicates with RFID devices. A mapping table(126) provides the RFID identification code and key values in order to store and read the RFID identification code and the key values. A key value extracting unit(124) obtains the RFID identification code of the key and extracts the key value corresponding to the RFID identification code obtained from the mapping table.

Description

RF keyboard system comprising a plurality of RFID device}

The present invention relates to an RFID keyboard system. More particularly, the present invention relates to an RFID keyboard system in which each of the keys is activated in response to a user's button press and functions as a keyboard.

RFID systems have been introduced and used in transportation systems such as subways and buses. The RFID system includes an RFID reader and an RF frequency transponder called a tag. The tag is attached to an item that the user carries, such as a transportation card. The RFID system emits a predetermined RF frequency from the RFID reader, and this RF frequency causes the tag to operate. The tag transmits its own identification number to the RFID reader, and the identification number is received and recognized by the RFID reader. In this way, the RFID system identifies various users through data transmission and reception between the RFID reader and the tag, and executes various service processes such as collecting usage fees for the users.

On the other hand, the conventional wireless keyboard device is inconvenient to require a separate battery, there is a problem that does not completely wireless when using a chargeable battery and applying a charging voltage supply line. In addition, the conventional wireless keyboard device does not cause interference because different frequencies are used, but there is a problem that there is a fear of frequency interference in some cases.

An object of the present invention is to provide an RFID keyboard system that requires no battery power in the keyboard and is easy to carry.

In addition, the technical problem to be achieved by the present invention is to provide an RFID keyboard system of smart size by reducing the area as possible.

RF ID input device according to an aspect of the present invention for achieving the above technical problem,

An RF keyboard including a plurality of RF ID keys each having an RFID element configured to be normally driven when the switch is short-circuited and not to operate when the switch is short-circuited and having different RFID ID codes; And

And an RFID ID receiving unit which accesses the RFID keyboard and receives information of an RFID key pressed.

The RFID receiver,

An RF ID reader having a wireless antenna to communicate with the RF ID elements of the RF keyboard;

A mapping table for storing and reading a plurality of RFID ID codes and key values corresponding to the RFID ID codes, and

And a key value extraction unit for obtaining an RFID ID code of the key pressed through the RFID reader and extracting a key value corresponding to the RFID ID code obtained from the mapping table.

In addition, the RFID keyboard,

Each includes a plurality of RFID keys including a RFID ID element configured to be normally driven when the switch is short-circuited and not to operate when the switch is short-circuited and have different RFIDID codes,

The RFID ID code may include a number key for use as a password, and the RFID keyboard may function as a credit card capable of inputting a password or provide a plurality of IDs in one card.

In addition, the switch may be disposed between the tag power supply unit and the tag logic circuit unit.

In addition, the RFID key,

It is preferable to further include a latch between the switch and the tag logic circuit portion to maintain a power supply voltage supplied through the switch for a predetermined time.

In addition, the RFID key,

It is preferable to further include a latch between the switch and the tag logic circuit portion to maintain a power supply voltage supplied through the switch for a predetermined time.

In addition, the RF ID keyboard system according to the present invention for achieving the above another technical problem, each of the RF ID device comprises a switch that is configured to operate normally when the switch is short-circuit and not to operate when the opening is different from the RFID ID code An RFID keyboard including a plurality of RFID keys; And

And an RFID ID receiving unit which accesses the RFID keyboard and receives information of an RFID key pressed.

The RFID keyboard has a plurality of RFID elements, and the antenna pattern connected to the RFID elements has independent antenna pattern paths bypassed with respect to the available area in the keyboard.

The RFID keyboard of the RFID keyboard system according to the present invention has advantages as a wireless keyboard and does not require a separate power source. In addition, since the size of the RFID element is small, the thin film is light and rollable while being used as a wireless keyboard by applying a fusible film, which has the advantage of convenient storage and transportation. In addition, there is no crosstalk due to the characteristics of the RFID device has the advantage of excellent security.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a block diagram illustrating a structure of an RFID keyboard system according to a first embodiment of the present invention. 2 illustrates an example of the structure of each key of FIG. 1 as a cross-sectional view.

Referring to FIG. 1, an RFID keyboard system according to a first embodiment of the present invention includes an RFID keyboard 10 and an RFID receiver 12. The RFID keyboard 10 includes an RFID element 204, which is provided with a switch 202 so that the switch 202 is normally operated when the switch 202 is short-circuited and not operated when opened. It includes a plurality of RFID keys (100, 102, 104).

The RF ID receiving unit 12 receives the information on the RF ID key pressed by accessing the RF ID keyboard, and has a wireless antenna 120 to provide the RFID elements included in the RF ID keyboard 10. The RFID reader 122 communicating with 204, a mapping table 126 for storing and reading a plurality of RFID ID codes and key values corresponding to each RFID ID code, and the RFID reader ( And a key value extraction unit 124 for obtaining an RFID ID code of the key pressed through 122 and extracting a key value corresponding to the RFID ID code obtained from the mapping table 126.

More preferably, the apparatus further includes a conventional kisscan processing unit 128 which scans and finds a key pressed in each of the keys 100, 102, 104, ... of the RFID keyboard 10.

FIG. 3 is a block diagram illustrating an example of information stored in the mapping table 126 of FIG. 1. Referring to FIG. 3, different assigned character values, that is, different key values, are assigned to respective RFID identification codes. That is, even if the key corresponds to the same position or character, the RFID code used by the key may be different. Then, without knowing the mapping table of ASCII code values and RFID actual code values, the actual input cannot be determined.

Therefore, the RFID keyboard system according to the present invention as described above will function as a programmable keyboard. Therefore, when the key of the RFID # 01 is pressed, the key value of the character "a" is extracted. When the key of the RFID # 02 is pressed, the key value of the character "A" is extracted. The other key value is changed only by changing the mapping. It is possible to assign. Here, in the case of a general keyboard method, since these characters use ASCII key values, different RFID keyboards will apply different RFID codes to keys at the same position.

That is, according to the present invention, it is impossible to determine what input actually occurs unless a mapping table for storing a plurality of RFID ID codes and key values corresponding to the RFID ID codes is known. Since such a mapping table can be programmed by mapping, the keyboard system according to the present invention as described above provides a programmable keyboard.

RF ID keyboard system according to the present invention as described above, because each RFID elements 204 are generated by using the RF signal emitted from the RFID reader 122, and does not require a separate battery. not. In addition, since the RFID elements 204 are distinguished using different RFID ID codes, frequency interference does not occur. It is also possible to make it very thin, which has the advantage of being wireless and winding.

Figure 4 shows the structure of a credit card according to a second embodiment of the present invention having an RFID input device including a plurality of RFID elements according to the present invention. Referring to FIG. 4, the same RF keyboard 400 as described with reference to FIGS. 1 and 2 is applied to a card such as a credit card or an ID card. The RFID keyboard 400 includes a plurality of RFID ID keys, each of which includes an RFID ID element that includes a switch, and when the switch is short-circuited, the RF ID element is configured to operate normally and not operate when the switch is short-circuited. Wherein, the RFID ID code can be applied to function as a credit card capable of password input by the RF keyboard 400, including a number key for use as a password.

That is, according to the above embodiment, it is possible to apply for the purpose of inputting a password or user authentication number in a credit card or other security card. For example, each adds RFID elements assigned to the numeric tag keys 0-9 with a switch to an existing credit card to an existing card. Of course, the credit card reader has a pre-stored mapping table. The card's encryption key can then be passed to the credit card reader to provide simple user authentication.

In addition, the RFID input device as shown in FIG. 4 may be applied to provide a plurality of IDs to a single card, and it may be possible to have a function of several cards in a single card. That is, by applying this method, it is possible to provide a card encryption function relatively simply to an existing credit card or ID card, and it is possible to use as a card having a plurality of IDs or functions with one card.

In addition, the RFID keyboard system as described above has the advantages as a wireless keyboard, but does not require a separate power source. In addition, since the size of the RFID element is small, the thin film is light and rollable while being used as a wireless keyboard by applying a fusible film, which has the advantage of convenient storage and transportation. In addition, due to the characteristics of the RFID device, there is no crosstalk, thereby providing excellent security.

Meanwhile, in the above embodiments, all of the RFID elements have been described as an example in which one antenna is independently applied. In practice, however, the required area may increase, which may limit the miniaturization. In order to solve this problem, in the RFID input device according to the present invention, as shown in FIG. 5, a plurality of RFID elements share a single antenna pattern 506. At this time, the antenna pattern 506 may be required to be equal to the distance from the RFID element or RFID chips to be matched to a plurality of RFID chips through one antenna.

Referring to FIG. 5, an RFID keyboard applied to an RFID keyboard system according to an exemplary embodiment of the present invention includes a plurality of RFID elements 502, and one antenna pattern 506 is provided on the RFID elements 502. Connected. The RFID card according to this embodiment not only greatly reduces the required area in designing a card device applying a plurality of RFID elements, but also needs to form only one antenna pattern for the entire card area. By precisely forming each RFID element, it is possible to prevent a problem that the entire RFID card cannot be used when an antenna pattern formation defect of one RFID element occurs.

In addition, when the switch is disposed between the antenna and the tag chip as in the above embodiments, there is a possibility that the switch affects the RF characteristics and thus a reception failure occurs. Therefore, according to the third embodiment of the present invention, as shown in FIG. 7, the switch 704 is disposed between the tag power supply 700 and the tag logic circuit 702. The antenna 706 receives the RF radio wave, generates a power supply voltage at the tag power supply unit 700, detects an RF signal at the tag RF circuit unit 708 using the power supply voltage, and includes the RF signal detected by the tag logic circuit. Extract the identification code. Here, the switch 704 may be less electrically influenced by the reception of the RF signal since the switch 704 is electrically electrically independent from the RF receiver system including the antenna 706, the tag power supply 700, and the tag RF circuitry 702. .

In addition, according to the national standard of the tag RF circuit section, it takes about 100 milliseconds to read two to three tags. Therefore, when switching too fast, the tag may not be recognized.

FIG. 8 is a circuit diagram illustrating a structure in which a latch is added between a switch and a tag logic circuit as a separate element applicable to an RF keyboard of the RF keyboard system according to the fourth embodiment of the present invention. Referring to FIG. 8, the RFID input device according to the fifth embodiment of the present invention arranges a switch 804 between the tag power supply unit 800 and the tag logic circuit unit 802 independently of the antenna 806, and switches the switch 804. Between latch 804 and tag logic circuitry 802 add a latch 810, such as a charging capacitor. The RFID input device of the above embodiment guarantees a more stable operation by providing a margin of tens of milliseconds required for the reader to recognize the tag.

The RFID input device according to the present invention can be applied to various input devices including computer peripherals.

1 is a block diagram showing the structure of an RFID keyboard system according to a first embodiment of the present invention;

2 is a cross-sectional view showing an example of the structure of each key of FIG.

3 is a block diagram illustrating an example of information stored in the mapping table 126 of FIG. 1;

4 is a plan view showing the structure of a credit card according to a second embodiment of the present invention having an RFID input device including a plurality of RFID elements according to the present invention;

FIG. 5 is a view showing a structure having an independent antenna pattern path bypassed with respect to an available area of a card as an RFID input device according to a third embodiment of the present invention; FIG.

6 is a perspective view showing the structure of a conventional RFID input device;

FIG. 7 is a circuit diagram illustrating a structure in which a switch is disposed between a tag power supply unit and a tag logic circuit unit as individual elements applicable to an RFID keyboard of an RFID keyboard system according to a third exemplary embodiment of the present invention.

FIG. 8 is a circuit diagram illustrating a structure in which a latch is added between a switch and a tag logic circuit unit as individual elements applicable to an RF keyboard of the RF keyboard system according to the fourth embodiment of the present invention.

Claims (6)

An RF keyboard including a plurality of RF ID keys each having an RFID element configured to be normally driven when the switch is short-circuited and not to operate when the switch is short-circuited and having different RFID ID codes; And And an RFID ID receiving unit which accesses the RFID keyboard and receives information of an RFID key pressed. The RFID receiver, An RF ID reader having a wireless antenna to communicate with the RF ID elements of the RF keyboard; A mapping table for storing and reading a plurality of RFID ID codes and key values corresponding to the RFID ID codes, and And a key value extracting unit for obtaining an RFID ID code of the key pressed through the RFID reader and extracting a key value corresponding to the RFID ID code obtained from the mapping table. RF ID keyboard system including. The RFID keyboard, Each includes a plurality of RFID keys including a RFID ID element configured to be normally driven when the switch is short-circuited and not to operate when the switch is short-circuited and have different RFIDID codes, The RFID ID code includes a number key for use as a password. The RFID keyboard functions as a credit card capable of inputting a password or provides a plurality of IDs on a single card. RFID keyboard system comprising a. The method according to claim 1 or 2, And the switch is disposed between a tag power supply unit and a tag logic circuit unit. The method according to claim 1 or 2, The RFID key is, And a latch for maintaining a power supply voltage supplied through the switch between the switch and the tag logic circuit unit for a predetermined time. The method of claim 3, The RFID key is, And a plurality of RFID elements between the switch and the tag logic circuit unit for maintaining a power supply voltage supplied through the switch for a predetermined time. An RF keyboard including a plurality of RF ID keys each having an RFID element configured to be normally driven when the switch is short-circuited and not to operate when the switch is short-circuited and having different RFID ID codes; And And an RFID ID receiving unit which accesses the RFID keyboard and receives information of an RFID key pressed. The RFID keyboard includes a plurality of RFID elements, and the antenna pattern connected to the RFID elements has independent antenna pattern paths bypassed with respect to the available area in the keyboard.

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