KR200193236Y1 - Loop antenna for noncontact type rf ic chip with folder type portable telephone - Google Patents

Abstract

The present invention overcomes communication barriers caused by electromagnetic interference devices (EMI) of mobile phones by changing the shape and mounting position of loop antennas for non-contact electronic chips, and extends the communication distance to the card reader through the loop antenna. The present invention relates to a loop antenna for a contactless electronic chip embedded in a clamshell mobile phone.

The present invention is characterized in that the first printed circuit board and a first electromagnetic wave blocking device for removing the electromagnetic noise generated in the first printed circuit board and a plurality of function buttons and the liquid crystal display device mounted inside the lower plate, In a second type of electromagnetic interference device for removing electromagnetic noise generated from a second printed circuit board and a second printed circuit board for connecting the first printed circuit board and the speaker, and a foldable mobile phone having an electronic chip and a loop antenna: The loop antenna is installed at a point spaced apart from the outside of the second electromagnetic shielding device built in the upper plate of the clamshell mobile phone, and the loop antenna is provided with the second electromagnetic wave so that the magnetic field generated by the loop antenna is not affected by the second electromagnetic shielding device. It is located at a point sufficiently separated from the outside of the shield.

When the loop antenna embedded in the mobile phone communicates with the card reader, the loop antenna is located so that the magnetic field generated as the loop antenna receives the outgoing frequency generated from the card reader is not affected by the electromagnetic shielding device. By installing the electromagnetic wave blocking device and the printed circuit board embedded in the upper plate of the mobile phone, there is an advantage that the communication distance between the card reader and the electronic chip is secured.

Description

Loop antenna for noncontact electronic chip embedded in clamshell phone

The present invention relates to a loop antenna for a contactless electronic chip embedded in a clamshell mobile phone, and more particularly, to an electromagnetic interference device (EMI) of a cellular phone by changing the shape and mounting position of the loop antenna for a contactless electronic chip. The present invention relates to a loop antenna for a contactless electronic chip embedded in a clamshell mobile phone which overcomes communication barriers and extends a communication distance to a card reader through a loop antenna.

With the establishment of the information age, various types of cards have been diversified, and from simple recording media such as magnetic stripe cards to integrated IC (IC) cards, which are now integrated with chips.

That is, an electronic chip embedded card (hereinafter, referred to as a 'pass card') that can be used in a subway or a bus is classified into a contact card by a contact terminal, a chip, and an RF contactless card. The contactless card has a loop antenna and an RF IC chip inside, and communicates with a card reader installed in a bus or subway, so that the fee is settled by a financial server. That is, in this type of transportation card, after the user is first provided with the service, the fare information of the provided service and the unique identifier information of the electronic chip embedded in the corresponding transportation card are immediately or artificially transmitted to the financial server. After a certain period of time (payment date), payment is made by postpay.

In addition, the bus card using the charging method of the bus card currently in use is a separate charging device by taking a method of re-recording the new value information after calculating the amount of use from the charged amount information while communicating with the card reader, Go to the charging station where is installed, settle a certain amount of money, and use the new amount information after charging this amount.

According to such a conventional RF contactless card, the user is inconvenient because the card must be carried separately, there is a risk of loss of the card, there is a problem in that the inconvenience to go to the charging station to charge the amount of money in the card.

In order to solve this problem, the present applicant has applied for a non-contact electronic chip in the flip of a mobile phone, which is always carried by many users, to achieve the purpose of the card (Patent Application No. 1999-24789 (filed date: November 12, 1999) (Name of the invention: a mobile phone with a contactless electronic chip).

A conventional mobile phone with a built-in contactless electronic chip prevents loss of a traffic card and satisfies the purpose of the card by embedding or attaching a contactless electronic chip embedded in a traffic card on a flip of the mobile phone. There is an advantage that can be conveniently settled using the method.

The state in which the amount settlement method using the electronic chip and the card reader embedded in the conventional mobile phone is generally applied to the folding mobile phone as follows.

A printed circuit board having various circuits, liquid crystal display elements, and function buttons mounted between the lower plate rear frame (where the battery is mounted) and the front frame (where the liquid crystal display element and the function button through-hole are formed) of the conventional folding cellular phone; In addition, an electromagnetic wave blocking device for removing electromagnetic noise generated by a printed circuit board is included.

In addition, between the upper front frame (the part facing the dial button) and the rear frame (the part where the company logo is attached) of the folding cellular phone, there is another connection for connecting the printed circuit board built into the lower part and the speaker embedded in the upper part. A printed circuit board, an electromagnetic wave shielding device for removing electromagnetic noise generated by the printed circuit board, an RF chip, and a loop antenna are embedded.

In a typical loop antenna, the communication distance is determined according to the length, thickness, and winding area of the coil to be wound, and the loop antenna is wound about four to twelve times along the edge of the folder in accordance with a miniaturized mobile phone. At this time, the typical number of windings is eight times, and the communication distance between the card reader and the electronic chip is maintained at 3 to 5 cm.

In addition, the electronic chip is not provided with a separate power source, and the electronic chip uses energy obtained by the loop antenna receiving a 13.56 MHz transmission frequency generated from the card reader to form a magnetic field as a driving power source.

However, the following problem (s) occur according to the conventional folding type portable telephone incorporating such a contactless electronic chip.

That is, the inside of the upper plate of the folder is mounted on another printed circuit board for connecting the printed circuit board inside the lower plate and the speaker inside the upper plate, and between the printed circuit board and the front frame of the upper plate to remove the electromagnetic waves generated by this Has a built-in electromagnetic shield. By the way, when the electronic chip communicates with the card reader, the electromagnetic shielding device is located in the magnetic field area generated by the loop antenna, so that the magnetic field generated by the loop antenna is almost extinguished by the electromagnetic shielding device. Therefore, the phenomenon that the communication distance between the electronic chip and the card reader becomes extremely short occurs.

Therefore, the present invention is to solve such a problem (s), the object of the present invention is to change the mounting position of the loop antenna is optimally unaffected by the electromagnetic wave shield built into the top plate of the clamshell mobile phone It is to provide a loop antenna for a contactless electronic chip embedded in a clamshell mobile phone so as to secure a communication distance.

1 is an exploded perspective view of a loop antenna for a contactless electronic chip embedded in a clamshell mobile phone according to the present invention,

2 is a detailed structural diagram of FIG. 1.

<Description of the code used in the main part of the drawing>

100: mobile phone 101: bottom plate

101a: lower plate rear frame 101b: lower plate front frame

102: liquid crystal display device 103: function button

104, 108: printed circuit board 105, 107: electromagnetic wave shielding device

106: Top plate 106a: Top plate front frame

106b: top frame rear frame 109: electronic chip

110: loop antenna 111: support member

A feature of the present invention for achieving the above object (s) is a first printed circuit board and a first printed circuit board to remove the electromagnetic noise generated in the first printed circuit board and a plurality of function buttons and a liquid crystal display device mounted inside the lower plate Built-in electromagnetic shielding device, a second electromagnetic shielding device and an electronic chip and loop antenna to remove the electromagnetic noise generated in the second printed circuit board and the second printed circuit board for connecting the first printed circuit board and the speaker inside the top plate In the clamshell mobile phone having a built-in: The loop antenna has a point spaced from the outside of the second electromagnetic shielding device built in the upper plate of the clamshell mobile phone, and the magnetic field generated from the loop antenna is applied to the second electromagnetic shielding device. The loop antenna is located at a point sufficiently separated from the outside of the second electromagnetic shield so that it is not affected.

Hereinafter, exemplary embodiment (s) of the present invention will be described in detail with reference to the accompanying drawings. First, in adding reference numerals to the elements of each drawing, it should be noted that the same elements are denoted by the same reference numerals as much as possible even if they are displayed on different drawings. In addition, in the following description, many specific details such as components of a specific circuit are shown, which are provided to help a more general understanding of the present invention, and the present invention may be practiced without these specific details. It is self-evident to those of ordinary knowledge in Esau. In describing the present invention, when it is determined that a detailed description of a related known function or configuration may unnecessarily obscure the subject matter of the present invention, the detailed description thereof will be omitted.

1 is an exploded perspective view of a loop antenna for a contactless electronic chip embedded in a clamshell mobile phone according to the present invention, and FIG. 2 is a detailed structural diagram of FIG. 1.

Referring to Figures 1 and 2 will be described the configuration and operation of the present invention.

Various circuits and liquid crystal display elements between the lower plate 101 of the clamshell mobile phone 100 and the rear frame 101a (the portion where the battery is mounted) and the front frame 101b (the portion where the liquid crystal display element and the function button through hole are formed). A printed circuit board 104 on which the 102 and the function buttons 103 are mounted, and an electromagnetic wave shield 105 for removing electromagnetic noise generated by the printed circuit board 104 are incorporated. At this time, the electromagnetic wave shielding device 105 is installed in the remaining area except for the position where the liquid crystal display device 102 and the function button 103 of the mobile phone 100 are located.

In addition, an electromagnetic wave shielding device 107 and an upper plate 106 of the clamshell mobile phone 100 are disposed between the front frame (a portion facing the dial button) 106a and the rear frame (the portion to which the company logo is attached) 106b. A printed circuit board 108 for connecting the printed circuit board 105 embedded in the lower plate and the speaker embedded in the upper plate, and an integrated RF electronic chip 109 and a loop antenna 110 are sequentially installed. . In addition, the upper plate 106 is provided with a support member 111 to prevent the embedded electronic chip 109 and the loop antenna 110 is separated.

In this case, the loop antenna 110 is installed at a point spaced apart from the outside of the printed circuit board 108 and the electromagnetic wave shield 107 embedded in the upper plate 106 of the mobile phone 100. At this time, the loop antenna 110 is preferably installed at a point sufficiently separated from the outside of the electromagnetic wave shield 107 so that the magnetic field generated by the transmission frequency from the card reader is not affected by the electromagnetic wave shield 107. .

That is, as shown in Figure 2, if the loop antenna 110 is installed in the outer region of the electromagnetic wave shielding device 107 and the printed circuit board 108 in the upper plate 106 of the mobile phone 100, the card reader As the generated 13.56 MHz outgoing frequency at is received at the loop antenna 108, a magnetic field is formed at the loop antenna 108, and the magnetic field of the loop antenna 108 is generated at a point away from the electromagnetic wave shield 107. In the end, normal energy is supplied to the electronic chip 109. Therefore, a communication distance of 3 to 4 cm is secured between the electronic chip 109 and the card reader.

As described above, in the detailed description of the present invention, specific embodiment (s) have been described, but various modifications are possible without departing from the scope of the present invention. Therefore, the scope of the present invention should not be limited to the embodiment (s) described, but should be defined by the utility model registration claims as described below and equivalents to the utility model registration claims.

As a result, according to the loop antenna for a non-contact electronic chip embedded in a clamshell mobile phone according to the present invention, the following advantage (s) occurs.

That is, when the loop antenna embedded in the mobile phone communicates with the card reader, the position of the loop antenna is folded so that the magnetic field generated by the loop antenna receiving the outgoing frequency generated from the card reader is not affected by the electromagnetic wave shield. The communication distance between the card reader and the electronic chip is secured by installing the electromagnetic wave shielding device embedded in the upper plate of the cellular phone and the outer portion of the printed circuit board.

Claims (1)

A first printed circuit board having a plurality of function buttons and a liquid crystal display device mounted therein, and a first electromagnetic shielding device for removing electromagnetic noise generated from the first printed circuit board are included in the lower plate. A second printed circuit board for connecting a substrate and a speaker, a second electromagnetic wave shielding device for removing electromagnetic noise generated from the second printed circuit board, and a foldable mobile phone having an electronic chip and a loop antenna: The loop antenna is installed at a point spaced apart from the outside of the second electromagnetic shielding device embedded in the upper plate of the clamshell mobile phone, so that the magnetic field generated by the loop antenna is not affected by the second electromagnetic shielding device. The loop antenna is a loop antenna for a contactless electronic chip embedded in a clamshell mobile phone, characterized in that installed at a point sufficiently separated from the outside of the second electromagnetic shielding device.