KR20210099959A - Cell phone case having nfc reader and ble - Google Patents

Abstract

The present invention relates to a mobile phone case equipped with a near field communication (NFC) reader and a Bluetooth low energy (BLE) unit and, more specifically, to a mobile phone case equipped with an NFC reader and a BLE unit including an extended antenna while an NFC power of a mobile phone extends to a cover of the mobile phone case through a coupling antenna and the extended antenna. According to the present invention, the mobile phone case comprises an NFC reader detecting a tag of a card and a BLE unit transmitting a tag detection result from the NFC reader to the mobile phone, thereby allowing directly transmitting the tag detection result from the mobile phone case to the mobile phone. Since the extended antenna is turned on/off through the NFC reader according to whether the cover is opened or closed, power consumption can be reduced by detecting a card only when the cover is opened or closed. Since the NFC reader is installed in the mobile phone case, whether the card is lost can be detected only by the mobile phone case without intervention of the mobile phone. Since the NFC power of the mobile phone extends to the cover of the mobile phone case, the tag provided on the card is recognized without a separate power supply, and thus whether the card is lost can be determined. In addition, the tag of the card is detected with the extended antenna only when the cover is opened or the mobile phone is moved by using the NFC reader, and thus battery consumption of the mobile phone can be minimized.

Description

Mobile phone case with NFC reader and BLE {CELL PHONE CASE HAVING NFC READER AND BLE}

The present invention relates to a mobile phone case equipped with an NFC reader and BLE, in particular, extending the NFC power of the mobile phone to the cover of the mobile phone case through a coupling antenna and an extended antenna, but to a mobile phone case having an NFC reader and BLE in the extended antenna it's about

In general, a mobile phone has an outer case made of metal or plastic and a screen made of glass. Therefore, it is vulnerable to an external shock, and in order to compensate for this, a mobile phone case that wraps and protects the mobile phone is used. In addition, there are many cases of using a card storage cell phone case for storing cards, etc. in addition to simply protecting the cell phone. Such a card storage cell phone case includes a cell phone mounting frame on which the cell phone is mounted, a diary type comprising a cover having a card storage pocket to cover the cell phone screen, and a card bumper case type in which a card storage pocket is formed on the rear side of the cell phone mounting frame.

However, the aforementioned card storage cell phone case is difficult to recognize the loss of the card before the user visually confirms it, and in particular, in the case of the card bumper case, it collides with the NFC function of the cell phone and generates an error. Moreover, there is a cumbersome need for a separate configuration for recognizing a tag attached to a card in the prior art.

Republic of Korea Patent Publication No. 10-2018-0015315 (published on February 13, 2018)

An object of the present invention is to provide a mobile phone case equipped with an NFC reader and BLE that can directly transmit whether a tag is detected in the mobile phone case to the mobile phone.

Another object of the present invention is to provide a mobile phone case equipped with an NFC reader and BLE that can detect whether a card is lost without conflicting with the NFC function of the mobile phone.

Another object of the present invention is to provide a mobile phone case equipped with an NFC reader and BLE that can detect whether the card is lost, but minimize the battery consumption of the mobile phone.

Another object of the present invention is to provide a mobile phone case equipped with an NFC reader and BLE, which can reliably detect whether the card stored in the cover of the mobile phone case is lost with a simple structure.

The object of the present invention is not limited to the above-mentioned object, and other objects and advantages of the present invention not mentioned can be understood by the following description, and will be more clearly understood by the examples of the present invention. Moreover, it will be readily apparent that the objects and advantages of the present invention may be realized by the means and combinations thereof indicated in the claims.

A mobile phone case equipped with an NFC reader and BLE according to the present invention is a mobile phone case including a mobile phone mounting frame on which the mobile phone is mounted, and a cover covering the upper part of the mobile phone, and is provided in the mobile phone mounting frame to couple the NFC power of the mobile phone. and a coupling antenna that is provided on the cover, and an extended antenna connected to the coupling antenna, an NFC reader connected to the extended antenna, and a Bluetooth module connected to the NFC reader to perform Bluetooth communication with the mobile phone.

The Bluetooth module exemplifies that it includes BLE (Bluetooth Low Energy).

In addition, the present invention includes a microcontroller unit (MCU) for controlling whether the NFC reader operates according to whether the cover is opened or closed.

A regulator that includes a power supply unit for supplying power to the NFC reader and the Bluetooth module, and the power supply unit, a rectifier circuit for rectifying the power applied from the coupling antenna, and a regulator that regulates the power rectified in the rectifier circuit and supplies the NFC reader and the power supply unit includes

The extended antenna includes a link antenna connected to the coupling antenna and forming one loop, and a plurality of loop antennas spaced apart from each other while forming a multi-loop in a partial region of the link antenna.

The mobile phone case equipped with an NFC reader and BLE according to the present invention is provided with an NFC reader for detecting a tag of a card in the mobile phone case, and BLE for transmitting the tag detection result from the NFC reader to the mobile phone, the tag detection result from the mobile phone case to the mobile phone can be sent directly.

The mobile phone case equipped with an NFC reader and BLE according to the present invention can reduce power consumption by detecting the card only when the cover is opened or closed by turning on/off the extended antenna through the NFC reader according to detecting whether the cover is opened or closed.

The mobile phone case equipped with an NFC reader and BLE according to the present invention can detect whether the card is lost only by the mobile phone case without the intervention of the mobile phone by having an NFC reader in the mobile phone case.

The mobile phone case equipped with an NFC reader and BLE according to the present invention can determine whether the card is lost by extending the NFC power of the mobile phone to the cover of the mobile phone case and recognizing the tag provided on the card without a separate power supply.

In addition, the mobile phone case equipped with an NFC reader and BLE according to the present invention and the card loss detection device using the same can minimize the battery consumption of the mobile phone by detecting the tag of the card with the extended antenna only when the cover is opened or the mobile phone is moved using the NFC reader. can

In addition to the above-described effects, the specific effects of the present invention will be described together while describing specific details for carrying out the invention below.

1 is a conceptual diagram of a mobile phone case equipped with an NFC reader and BLE according to the present invention.
2 is a schematic plan view of an antenna in a mobile phone case equipped with an NFC reader and BLE according to the present invention.
3 is a plan view for explaining the number of loop antennas in a mobile phone case equipped with an NFC reader and BLE according to the present invention.
4 is a plan view for explaining the shape of a loop antenna in a mobile phone case equipped with an NFC reader and BLE according to the present invention.
5 is a block diagram of an MCU in a mobile phone case equipped with an NFC reader and BLE according to the present invention.

The above-described objects, features and advantages will be described below in detail with reference to the accompanying drawings, and accordingly, those of ordinary skill in the art to which the present invention pertains will be able to easily implement the technical idea of the present invention. In describing the present invention, if it is determined that a detailed description of a known technology related to the present invention may unnecessarily obscure the gist of the present invention, the detailed description will be omitted. Hereinafter, preferred embodiments according to the present invention will be described in detail with reference to the accompanying drawings. In the drawings, the same reference numerals are used to refer to the same or similar components.

1 is a conceptual diagram of a mobile phone case equipped with an NFC reader and BLE according to the present invention.

A mobile phone case equipped with an NFC reader and BLE according to the present invention is, as shown in FIG. 1 , a case body 100 having a mobile phone mounting frame 110 and a cover 120 , and a mobile phone mounting frame 110 . An antenna 200 for coupling NFC power to the cover 120, and a controller 400 that communicates with the mobile phone mounted on the mobile phone mounting frame 110 and transmits whether the tag is detected to the mobile phone or displays mobile phone information and controls the mobile phone include

The case body 100 is for storing and protecting the mobile phone, and is connected to the mobile phone mounting frame 110 that directly houses the mobile phone to protect the rear and side surfaces of the mobile phone, and the mobile phone mounting frame 110 to protect the mobile phone screen. and a cover 120 that does.

The mobile phone mounting frame 110 is formed in the shape of a rectangular frame with an open upper portion to correspond to the shape of the mobile phone to protect the rear and side surfaces of the mobile phone. In addition, the mobile phone mounting frame 110 may be formed to press the side of the mobile phone or to surround the upper edge of the mobile phone to prevent the stored mobile phone from being separated by impact or the like.

The cover 120 is connected to the mobile phone mounting frame 110 and is provided so that it can be opened and closed. The cover 120 is preferably formed in a rectangular plate shape to protect the upper part of the mobile phone. In addition, one or more card storage pockets 121 for accommodating cards are formed in the cover 120 .

2 is a schematic plan view of an antenna in a mobile phone case equipped with an NFC reader and BLE according to the present invention.

The antenna 200 couples the NFC (Near Field Communication) power of the mobile phone and delivers it to the cover 120 . To this end, the antenna 200 includes a coupling antenna 210 and an extended antenna 220 extending from the coupling antenna 210 as shown in FIGS. 1 and 2 .

The coupling antenna 210 is provided on the mobile phone mounting frame 110 to couple the NFC power of the mobile phone. This embodiment illustrates that the coupling antenna 210 is provided on the mobile phone mounting frame 110 in a rectangular frame shape based on a plan view. However, the present invention is not limited thereto, and the coupling antenna 210 according to the present invention may be formed in a polygonal frame shape including a circular frame shape, an elliptical frame shape, and a triangular frame shape based on a plan view.

The extended antenna 220 is connected to the coupling antenna 210 or extends from the coupling antenna 210 to receive NFC power of the mobile phone through the coupling antenna 210 . The extended antenna 220 is connected to the coupling antenna 210 or extends from the coupling antenna 210 and is located on the cover 120 of the mobile phone case. The extended antenna 220 includes a link antenna 221 and a loop antenna 222 formed on the link antenna 221 .

The link antenna 221 is connected to the coupling antenna 210 and forms one loop in the cover 120 of the mobile phone case. Here, the present embodiment exemplifies that the link antenna 221 has a rectangular loop shape to correspond to the shape of the card accommodated in the card storage pocket 121 . In addition, as shown in FIG. 2 , the link antenna 221 is provided for each card storage pocket 121 and attaches a tag attached to each card stored in each card storage pocket 121 to a loop antenna 222 to be described later. ), it is desirable to detect each of them. Here, the tag may be separately manufactured and attached to the card or may be formed on the card when the card is manufactured.

3 is a plan view for explaining the number of loop antennas in a mobile phone case equipped with an NFC reader and BLE according to the present invention, and FIG. 4 is a shape of a loop antenna in a mobile phone case equipped with an NFC reader and BLE according to the present invention. It is a plan view for explanation.

The loop antenna 222 is for recognizing the tag provided in the card, and is formed by making a part of the link antenna 221 in the form of a multi-loop. This embodiment exemplifies the loop antenna 222 formed in the form of multiple loops in the form of concentric circles as the loop antenna 222 . However, the present invention is not limited thereto, and the loop antenna 222 may be formed in a rectangular shape as shown in FIG. 4(a) or a triangular shape as shown in FIG. 4(b). . Furthermore, the loop antenna 222 may be formed in an elliptical shape as shown in FIG. 4(c) or a pentagonal loop antenna 222 as shown in FIG. 4(d). That is, according to the present invention, the loop antenna 222 can be formed in any shape as long as the tag provided in the card can be recognized. However, even in this case, the loop antenna 222 is preferably in the form of a multi-loop. Of course, in the drawings, it is shown that the multi-loop form is not electrically connected to each other, but in reality, the loop antenna 222 is a form in which the link antenna 221 is wound in a coil form in a plane.

On the other hand, the tag is preferably made as small as possible in order to minimize the interference between the tag and the tag and the NFC card, for example, the tag is smaller than the diameter of the loop antenna 222 or the loop antenna 222 ) and may be formed in a size corresponding to the Also, according to the present invention, a plurality of loop antennas 222 are provided in the link antenna 221 in order to recognize a tag of a small size.

In the present invention, a plurality of loop antennas 222 may be formed to be spaced apart from each other in the link antenna 221 , and in this embodiment, the link antenna 221 has four loop antennas 222 , that is, a first loop antenna ( 222a), the second loop antenna 222b, the third loop antenna 222c, and the fourth loop antenna 222d are provided to be spaced apart from each other. However, the present invention is not limited thereto, and two or more loop antennas 222 of the present invention may be provided in the link antenna 221 to be spaced apart from each other. Here, when the link antenna 221 is provided with two loop antennas 222, the loop antenna 222 is preferably positioned at the corner of the link antenna 221 having a rectangular loop shape, which is shown in FIG. As such, it may be located at ① and ②, which are upper corners of the link antenna 221 . Of course, the loop antenna 222 may be positioned at the lower corners of the link antenna 221, ③ and ④, the sides ② and ③, or ① and ④. Furthermore, the loop antenna 222 may be located at ① and ③, or ② and ④ of the link antenna 221 . In addition, when three loop antennas 222 are provided, they may be located at the other corners except for any one of the four corners of the link antenna 221 . Meanwhile, five loop antennas 222 of the present invention may be provided, and in this case, the four corners of the link antenna 221 and the center of the four corners may be located. In addition, when five loop antennas 222 are provided, the link antenna 221 is preferably connected to the coupling antenna 210 via the center of the four corners.

On the other hand, when the above-described two loop antennas 222 are provided, the recognition rate of the tag varies according to the storage direction of the card stored in the card storage pocket 121 , so the storage direction of the card stored in the card storage pocket 121 is changed. It is preferable to guide That is, when the tag is located on one upper side of the card, when the card is stored in the card receiving pocket 121, the tag recognition rate is high only when the loop antenna 222 is located in the area where the tag is located. Therefore, when two loop antennas 222 are provided, guiding the storage direction of the card is effective to increase the recognition rate of the tag.

However, when the four loop antennas 222 are provided, the tag can be detected at any of the four corners of the card, so a card receiving direction guide is unnecessary. In addition, it is effective that the antenna 200 of the present invention is made of a flexible material such as a flexible printed circuit board (FPCB) or a coil.

The controller 400 connects the cell phone case and the cell phone to display the cell phone state through the cell phone case or controls the cell phone through the cell phone case, and detects a tag through the NFC reader 423 . To this end, the controller 400 includes an LED/touch panel 410 , a mobile phone connector 420 , and a power supply 430 .

The LED/touch panel 410 displays mobile phone status information and controls the mobile phone by receiving a command from the user by touch. The cell phone status information displayed on the LED/touch panel 410 may include, for example, the current time, received phone information, and currently played music information, and the present invention provides card storage in the card storage pocket 121 . indicate whether In addition, the LED/touch panel 410 may perform functions such as receiving a command from a user through a touch, receiving a call, or controlling currently played music. This is, for example, the cell phone case according to the present invention may be a form in which the antenna 200 and the controller 400 are provided on the Samsung LED view cover. In this case, the basic function of the Samsung LED view cover is the card according to the present invention. It can perform a loss detection function.

The mobile phone connector 420 receives power through the power supply unit 430 , controls the LED/touch panel 410 , detects a tag provided in the card through the extended antenna 220 , and communicates with the mobile phone. To this end, the mobile phone connector 420 includes a microcontroller unit (MCU) 421 , BLE 422 and an NFC reader 423 .

5 is a block diagram of an MCU in a mobile phone case equipped with an NFC reader and BLE according to the present invention.

The MCU 421 controls the LED/touch panel 410 and the BLE 422 and the NFC reader 423 . To this end, the MCU 421 is, as shown in FIG. 5, an LED/touch panel controller 421a for controlling the LED/touch panel 410, a BLE controller 421b for controlling the BLE 422, and and an NFC reader controller 421c for controlling the NFC reader 423 .

The LED/touch panel controller 421a controls the LED/touch panel to display cell phone status information or a card loss warning. To this end, the LED/touch panel controller 421a transmits a command input from the user's touch to the mobile phone through the LED/touch panel, which may be performed through the BLE 422 . In addition, the LED/touch panel controller 421a may display the mobile phone status information or card loss warning transmitted from the mobile phone by controlling the LED.

The BLE controller 421b controls the Bluetooth communication between the mobile phone and the LED/touch panel 410 and the NFC reader 423 by controlling the BLE 422 .

The NFC reader controller 421c controls the NFC reader 423 according to whether the cover 120 is opened or closed and whether the mobile phone is moved. To this end, the NFC reader controller 421c includes a cover opening and closing sensor 421ca for detecting the opening and closing of the cover 120 from the cover opening and closing detection means, and a mobile phone movement detector for detecting the movement of the mobile phone from the mobile phone movement detecting means for detecting the movement of the mobile phone ( 421cb), a tag detection signal receiver 421cc that receives a tag detection signal from the extended antenna 220 by operating the NFC reader 423 when the cover 120 is opened or the mobile phone is moved, and based on the received tag detection signal A card loss detector (421cd) that determines whether a card is stored in the card storage pocket 121, and a warning indicator (421ce) that displays a warning when the mobile phone moves more than a preset distance in a state where the tag detection signal is not received include

The cover opening and closing sensor 421ca detects opening and closing of the cover 120 . Here, the cover opening/closing detector 421ca may detect opening/closing of the cover 120 using a magnet and a magnetic force sensor. The magnetic force sensor is provided on the cover 120 or the mobile phone mounting frame 110, and when the cover 120 is closed, it can detect a magnet that the cover 120 is attached to the mobile phone mounting frame 110. For example, when a magnet is provided in the cover 120 and a metal plate attached to the magnet is provided in the mobile phone mounting frame 110, a magnetic force sensor is provided on the metal plate and whether the magnet is close according to the opening and closing of the cover 120 By sensing, it is possible to detect whether the cover 120 is opened or closed. Of course, this is only an example, and an opening/closing switch (not shown) is provided on the mobile phone mounting frame 110 , and the cover 120 is turned on/off according to the opening and closing of the cover 120 through the opening/closing switch. It is also possible to detect whether the door is open or closed. That is, the configuration for detecting the opening of the cover 120 in the present invention may be any configuration as long as the cover opening/closing sensor 421ca detects the opening of the cover 120 to operate the NFC reader 423 .

The mobile phone movement detector 421cb detects the mobile phone's movement state. That is, the mobile phone movement detector 421cb detects whether the mobile phone is in a stationary state or in a moving state. To this end, the mobile phone movement detector 421cb may detect the movement of the mobile phone by using a gyro sensor provided in the mobile phone or by adding a gyro sensor to the mobile phone case. That is, the mobile phone movement detector 421cb detects the user's movement, that is, the movement of the mobile phone case, regardless of whether the cover 120 is opened or not, for example, through a gyro sensor provided in the mobile phone or mobile phone case. The reader 423 may be turned on. In this case, the gyro sensor turns on/off the NFC reader 423 by detecting various situations, such as when moving after stopping, moving for a predetermined time or a predetermined distance, and moving for a predetermined time or a predetermined distance after stopping. Off) can be turned off. Here, the predetermined time or the predetermined distance may be input from a user or may be input in advance when manufacturing a mobile phone case.

The tag detection signal receiver 421cc receives the tag detection signal transmitted through the extended antenna 220 and the NFC reader 423 . In addition, the tag detection signal receiver 421cc transfers the received tag detection signal to a card loss detector 421cd, which will be described later. Here, when the tag detection signal receiver 421cc detects that the cover 120 is opened by the cover open/close detector 421ca or detects the movement of the mobile phone from the mobile phone movement detector 421cb, the NFC reader 423 is turned on ) to operate the extended antenna 220 . That is, since the loss of the card stored in the card storage pocket 121 is most likely to occur when the cover 120 is opened or the mobile phone is moved, the present invention is expanded only when the opening of the cover 120 or movement of the mobile phone is detected. By operating the antenna 220, the mobile phone battery consumption is minimized.

The card loss detector 421cd detects whether the card is lost based on the tag detection signal received from the tag detection signal receiver 421cc. To this end, the card loss detector 421cd recognizes and registers the tag of the card stored in the card storage pocket 121, and registers the tag of the registered card through the extended antenna 220 provided in the card storage pocket 121. detect Here, the card loss detector (421cd) is a warning indicator (to be described later) when the tag of the registered card is not detected for a preset time, or movement of the mobile phone is detected through the GPS module of the mobile phone but the tag of the registered card is not detected 421ce) can transmit a card loss signal.

The warning indicator 421ce displays a warning when the card loss detector 421cd does not detect the card so that the user can recognize it. As described above, this can be performed by receiving a card loss signal from the card loss detector 421cd, and the warning indicator 421ce may display a warning through the LED/touch panel 410 of the cover 120. . Of course, the warning indicator 421ce may also display an acoustic warning through the speaker of the cell phone and vibration through the vibration module of the cell phone. Here, when displaying a warning through the LED/touch panel 410 of the cover 120, the warning indicator 421ce is omitted and the card loss detector 421cd displays a warning through the LED/touch panel 410. may be

On the other hand, the function of the above-described NFC reader controller 421c may be implemented in the form of an application in the mobile phone.

The BLE 422 is Bluetooth Low Energy, and performs Bluetooth communication with a mobile phone. Also, according to this, the BLE 422 may transmit whether the tag is detected by the NFC reader 423 to the mobile phone through Bluetooth communication. Of course, the BLE 422 not only detects the tag, but also allows the LED/touch panel 410 to communicate with the mobile phone. On the other hand, although the present embodiment exemplifies the BLE 422 for Bluetooth communication, the present invention is not limited thereto. That is, in addition to BLE, various types of Bluetooth modules including BLE can be used. Moreover, the present invention is not limited to the above-described Bluetooth module, and a wireless communication module for implementing various types of wireless communication may be used.

The NFC reader 423 detects a tag provided in the card through the extended antenna 220 . As described above, when the cover 120 is opened, the NFC reader 423 is turned on by the MCU 422 to operate the extended antenna 220 . Here, the coupling antenna 210 and the extended antenna 220 are connected through the NFC reader 423 and the MCU 422 and the mobile phone connector 410, and accordingly, when the NFC reader 423 is turned off (Off) The extended antenna 220 also does not operate because it does not receive power.

The power supply unit 430 converts the power received from the coupling antenna 210 and supplies it to the LED/touch panel 410 and the mobile phone connector 420 .

It includes a rectifier circuit for receiving power from the coupling antenna 210 for rectification, and a regulator for regulating the power rectified by the rectifier circuit.

The rectifier circuit rectifies the power applied from the coupling antenna 210 by half-wave. In addition, the power rectified in the rectifier circuit is applied to the regulator.

The regulator regulates the power rectified in the rectifying circuit and applies it to the LED/touch panel 410 and the mobile phone connector 420 . Here, the present embodiment exemplifies a low-dropout (LDO) as a regulator.

Meanwhile, the present invention may further include an authentication IC for performing mobile phone authentication by receiving power from the regulator.

The authentication IC receives power from the regulator and performs authentication with the mobile phone. In addition, the controller 400 can access the mobile phone by authentication of the mobile phone through the authentication IC.

As described above, the present invention can directly transmit the tag detection result from the mobile phone case to the mobile phone by providing an NFC reader for detecting the tag of the card in the mobile phone case, and BLE for transmitting the tag detection result from the NFC reader to the mobile phone. The present invention can reduce power consumption by detecting the card only when the cover is opened or closed by turning on/off the extended antenna through the NFC reader according to whether the cover is opened or closed. In addition, the present invention can detect whether the card is lost with only the mobile phone case without the intervention of the mobile phone by providing an NFC reader in the mobile phone case.

As described above, the present invention has been described with reference to the illustrated drawings, but the present invention is not limited by the embodiments and drawings disclosed in the present specification. It is obvious that variations can be made. In addition, although the effects according to the configuration of the present invention are not explicitly described and described while describing the embodiments of the present invention, it is natural that the effects predictable by the configuration should also be recognized.

100: mobile phone case body 110: mobile phone mounting frame
120: cover 121: card storage pocket
200: antenna 210: coupling antenna
220: extended antenna 221: link antenna
222: loop antenna 222a: first loop antenna
222b: second loop antenna 222c: third loop antenna
222d: fourth loop antenna 400: controller
410: LED/touch panel 420: mobile phone interface
421: MCU 421a: LED/touch panel controller
421b: BLE controller 421c: NFC reader controller
421ca: cover open/close detector 421cb: mobile phone movement detector
421cc: Tag Detection Signal Receiver 421cd: Lost Card Detector
421ce: warning indicator 422: BLE
423: NFC reader 430: power unit

Claims (5)

A mobile phone case comprising a mobile phone mounting frame on which the mobile phone is mounted, and a cover covering the upper part of the mobile phone,
A coupling antenna provided in the mobile phone mounting frame for coupling the NFC power of the mobile phone;
an extended antenna provided on the cover and connected to the coupling antenna;
NFC reader connected to the extended antenna, and
A mobile phone case including a Bluetooth module connected to the NFC reader to perform Bluetooth communication with the mobile phone.
According to claim 1,
The Bluetooth module is a mobile phone case including BLE (Bluetooth Low Energy).
3. The method of claim 2,
A mobile phone case including a microcontroller unit (MCU) for controlling whether the NFC reader operates according to whether the cover is opened or closed.
4. The method of claim 3,
A power supply unit for supplying power to the NFC reader and the Bluetooth module,
The power supply unit,
a rectifying circuit for rectifying the power applied from the coupling antenna;
and a regulator for regulating the power rectified by the rectifier circuit and supplying it to the NFC reader and the power supply unit.
5. The method of claim 4,
The extended antenna is
a link antenna connected to the coupling antenna and forming one loop;
A mobile phone case including a plurality of loop antennas spaced apart from each other and forming a multi-loop in a portion of the link antenna.

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