KR101265234B1 - Nfc device - Google Patents

Abstract

PURPOSE: An NFC(Near Field Communication) device is provided to prevent mutual interference between multiple antennas by disabling any one among a radio signal receiving antenna for NFC or a radio signal receiving antenna for wireless charging. CONSTITUTION: A first antenna(ANT1) receives radio signals for NFC. An NFC module(12) processes the radio signals received by the first antenna. A second antenna(ANT2) receives radio signals for wireless charging. A wireless charging module(14) processes the radio signals received by the second antenna. A mode register stores mode data showing the NFC mode of the NFC module.

Description

NFC Device {NFC DEVICE}

An embodiment according to the concept of the present invention relates to a near field communication (NFC) device, and particularly, any one of an antenna capable of receiving a wireless signal for NFC and an antenna capable of receiving a wireless signal for wireless charging. The present invention relates to an NFC device that can be disabled.

NFC refers to a non-contact, near-field wireless communication technology that uses frequencies in the high-frequency (13.56 MHz) band. NFC is applied to mobile devices, especially smart phones, to provide data communication between terminals, contactless smart card technology, or interoperability with wireless recognition technology.

The NFC operating mode, or NFC mode, includes a card emulation mode, a reader / writer mode, and a peer to peer mode.

The P2P mode includes an initiator mode in which an NFC terminal operates as an initiator and a target mode in which the NFC terminal operates as a target.

The card emulation mode is a mode in which the NFC terminal operates in a manner similar to a conventional contactless card. In the card emulation mode, the NFC terminal can be used as a credit card, a traffic card, or an ID card.

The reader / writer mode is a mode in which the NFC terminal can operate as a card reader. In the reader / writer mode, the NFC terminal can read an advertisement including a NFC tag, for example, a smart poster.

In the P2P mode, each of the two NFC terminals becomes a reader or a tag, and data communication between the NFC terminals is possible.

Patent Document 1: Publication No. 10-2011-0115602 (Published October 21, 2011) Patent Document 2: Registered Patent Publication No. 10-0971717 (July 21, 2010 announcement)

The technical problem to be achieved by the present invention is to provide an NFC device capable of disabling any one of an antenna capable of receiving a wireless signal for NFC and an antenna capable of receiving a wireless signal for wireless charging.

An NFC device capable of performing at least one of near field communication (NFC) or wireless charging according to an embodiment of the present invention may include a first antenna capable of receiving a wireless signal for the NFC and received by the first antenna. NFC module for processing a wireless signal, a second antenna for receiving a wireless signal for the wireless charging, a wireless charging module for processing a wireless signal received by the second antenna, and NFC of the NFC module And an antenna selection module capable of disabling either the first antenna or the second antenna, based on the mode, wherein the NFC mode includes a card emulation mode, a reader / writer ( Either a reader / writer mode or a peer to peer (P2P) mode, wherein the P2P mode includes an initiator mode in which the NFC device operates as an initiator and a target of the NFC device. It may be any one of a target mode that operates as a target.

According to an embodiment, the first switch is connected between the NFC module and the first antenna and a second switch connected between the wireless charging module and the second antenna, the antenna selection module, the NFC The first switch or the second switch may be switched based on a mode.

The method may further include a mode register configured to store mode data indicating the NFC mode, and the antenna selection module may determine the NFC mode based on the mode data.

According to an embodiment, the antenna selection module may disable the second antenna when the NFC mode is the reader / writer mode or the initiator mode.

An NFC device capable of performing at least one of NFC or wireless charging according to an embodiment of the present invention may process a first antenna capable of receiving a radio signal for the NFC and a radio signal received by the first antenna. NFC module, a second antenna capable of receiving a wireless signal for the wireless charging, a wireless charging module capable of processing a wireless signal received by the second antenna, and from the first antenna or the second antenna An antenna selection module may determine whether a frequency of the transmitted wireless signal belongs to the NFC frequency band, and disable one of the first antenna and the second antenna according to a determination result.

The antenna switch may further include a first switch connected between the NFC module and the first antenna, and a second switch connected between the wireless charging module and the second antenna. May be determined to belong to the NFC frequency band, and may switch the first switch or the second switch according to a determination result.

According to an embodiment, the antenna selection module may disable the first antenna when the frequency does not belong to the NFC frequency band.

According to an embodiment, the antenna selection module may determine the NFC mode of the NFC device and determine whether the frequency belongs to the NFC frequency band only when the NFC mode is a card emulation mode or a target mode. Can be.

An NFC device capable of performing at least one of NFC or wireless charging according to an embodiment of the present invention may process a first antenna capable of receiving a radio signal for the NFC and a radio signal received by the first antenna. NFC module, a second antenna capable of receiving a wireless signal for the wireless charging, a wireless charging module capable of processing a wireless signal received by the second antenna, and from the first antenna or the second antenna An antenna selection module may determine whether the transmitted wireless signal includes a request command for starting NFC, and disable one of the first antenna and the second antenna according to the determination result.

The antenna switch may further include a first switch connected between the NFC module and the first antenna, and a second switch connected between the wireless charging module and the second antenna. The first switch or the second switch may be switched depending on whether the received wireless signal includes the request command.

According to an embodiment, the antenna selection module may determine whether a frequency of the received wireless signal belongs to an NFC frequency band, and as a result of the determination, the received wireless signal is included only when the frequency belongs to the NFC frequency band. It may be determined whether to include a request command.

According to an embodiment, the antenna selection module may determine the NFC mode of the NFC device and determine whether the frequency belongs to the NFC frequency band only when the NFC mode is a card emulation mode or a target mode. Can be.

According to an embodiment, the antenna selection module, when the NFC mode is a reader / writer mode or initiator mode, disables the second antenna, and the NFC mode is the card emulation mode or the target mode and the If the frequency does not belong to the NFC frequency band, the first antenna is disabled, the NFC mode is the card emulation mode or the target mode and the frequency belongs to the NFC frequency band and the radio signal is the request command. When the second antenna is disabled and the NFC mode is the card emulation mode or the target mode and the frequency belongs to the NFC frequency band and the radio signal does not include the request command, The first antenna may be disabled.

An apparatus according to an embodiment of the present invention prevents interference between a plurality of antennas by disabling any one of an antenna capable of receiving a wireless signal for NFC and an antenna capable of receiving a wireless signal for wireless charging. It can be effective.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In order to more fully understand the drawings recited in the detailed description of the present invention, a detailed description of each drawing is provided.
1 is a block diagram of an NFC device according to an embodiment of the present invention.
FIG. 2 is a block diagram of the antenna selection module shown in FIG. 1.
3 is a flowchart illustrating a method of operating an NFC device according to an exemplary embodiment.
4 is a flowchart illustrating a method of operating an NFC device according to another exemplary embodiment.
5 is a flowchart illustrating a method of operating an NFC device according to another embodiment of the present invention.

Specific structural and functional descriptions of embodiments according to the concepts of the present invention disclosed in this specification or application are merely illustrative for the purpose of illustrating embodiments in accordance with the concepts of the present invention, The examples may be embodied in various forms and should not be construed as limited to the embodiments set forth herein or in the application.

Embodiments in accordance with the concepts of the present invention can make various changes and have various forms, so that specific embodiments are illustrated in the drawings and described in detail in this specification or application. It is to be understood, however, that it is not intended to limit the embodiments according to the concepts of the present invention to the particular forms of disclosure, but includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention.

Terms such as first and / or second may be used to describe various components, but the components should not be limited by the terms. The terms are intended to distinguish one element from another, for example, without departing from the scope of the invention in accordance with the concepts of the present invention, the first element may be termed the second element, The second component may also be referred to as a first component.

When a component is referred to as being "connected" or "connected" to another component, it may be directly connected to or connected to that other component, but it may be understood that other components may be present in between. Should be. On the other hand, when an element is referred to as being "directly connected" or "directly connected" to another element, it should be understood that there are no other elements in between. Other expressions describing the relationship between components, such as "between" and "immediately between," or "neighboring to," and "directly neighboring to" should be interpreted as well.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. Singular expressions include plural expressions unless the context clearly indicates otherwise. In this specification, the terms "comprises ", or" having ", or the like, specify that there is a stated feature, number, step, operation, , Steps, operations, components, parts, or combinations thereof, as a matter of principle.

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art. Terms such as those defined in the commonly used dictionaries should be construed as having meanings consistent with the meanings in the context of the related art, and are not construed in ideal or excessively formal meanings unless expressly defined herein. Do not.

As used herein, a module may refer to a functional or structural combination of hardware to perform the authentication method or software that can drive the hardware according to an embodiment of the present invention. Thus, the module may refer to a program code and a logical unit or set of hardware resources that can execute the program code.

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in detail with reference to the preferred embodiments of the present invention with reference to the accompanying drawings.

1 is a block diagram of an NFC device according to an embodiment of the present invention.

Referring to FIG. 1, the NFC device 10 may include a first antenna ANT1, a second antenna ANT2, an NFC module 12, a wireless charging module 14, an antenna selection module 16, and a first switch. 18) and a second switch 20.

According to an embodiment, the NFC device 10 may be implemented as a portable device such as a cellular phone, a smart phone, or a tablet personal computer.

The first antenna ANT1 may receive a radio signal for NFC. The first antenna ANT1 may mean a loop antenna for data communication.

The second antenna ANT2 may receive a wireless signal for wireless charging. The second antenna ANT2 may mean a receiving coil for wireless charging.

According to an embodiment, the frequency band of the wireless signal used for NFC and the frequency band of the wireless signal used for wireless charging may be different.

According to another embodiment, the frequency band of the wireless signal used for NFC and the frequency band of the wireless signal used for wireless charging may overlap.

The NFC module 12 may process a wireless signal received through the first antenna ANT1. According to an embodiment, the NFC module 12 may process data obtained from the radio signal.

The wireless charging module 14 may process a wireless signal received by the second antenna ANT2. According to an embodiment, the wireless charging module 14 may allow the power obtained from the wireless signal received by the second antenna ANT2 to be used for supplying power to the NFC device 10.

According to another embodiment, the wireless charging module 14 may store the power obtained from the wireless signal received by the second antenna ANT2 in a battery (not shown).

The antenna selection module 16 may selectively disable each of the first antenna ANT1 and the second antenna ANT2.

According to an embodiment, the antenna selection module 16 may switch the first switch 18 to disable the first antenna ANT1. According to another exemplary embodiment, the antenna selection module 16 may switch the second switch 20 to disable the second antenna ANT2.

Methods and processes for selecting an antenna to be disabled by the antenna selection module 16 are described in detail in FIGS.

According to an embodiment, each of the first switch 18 and the second switch 20 may be implemented as a thyristor, a transistor, a field effect transistor (FET), or the like, but is not limited thereto.

FIG. 2 is a block diagram of the antenna selection module shown in FIG. 1.

1 and 2, the antenna selection module 16 may include a mode register 22, a frequency detection module 24, a request command detection module 26, and a selection module 28. have.

In FIG. 2, for convenience of description, the antenna selection module 16 includes a mode register 22, a frequency detection module 24, and a request command detection module 26. It is not limited.

The mode register 22 may store mode data MDATA indicating an NFC mode of the NFC device 10, such as a card emulation mode, a reader / writer mode, or a P2P mode (initiator mode or target mode).

The frequency detection module 24 detects whether the frequency of the wireless signal transmitted from the NFC module 12 or the wireless charging module 14 belongs to the NFC frequency band, and generates a detection signal DETECT1 according to the detection result. Can be.

The NFC frequency band may mean a frequency band used for NFC.

The request command detection module 26 may detect whether the wireless signal transmitted from the NFC module 12 or the wireless charging module 14 includes a request command, and generate a detection signal DETECT2 according to the detection result. .

The request command may refer to a request originally transmitted to start the NFC. According to an embodiment, the request command may refer to a request command or a wake-up command for starting the NFC.

According to an embodiment, the selection module 28 may transmit the mode data MDATA transmitted from the mode register 22, the detection signal DETECT1 transmitted from the frequency detection module 24, and the request command detection module 26. At least one of the detection signals DETECT2 may be received and a switch signal SW1 or SW2 may be generated based on the detection signal DETECT2.

The selection module 28 receives the mode data MDATA in order to confirm the NFC mode of the NFC device 10, but is not limited thereto.

According to an embodiment, the first switch 18 may be switched according to the switch signal SW1. According to an embodiment, the second switch 20 may be switched according to the switch signal SW2.

3 is a flowchart illustrating a method of operating an NFC device according to an exemplary embodiment.

1 to 3, the antenna selection module 16 may receive a wireless signal through the first antenna ANT1 or the second antenna ANT2 (S10).

The request command detection module 26 may detect whether the received wireless signal includes the request command and generate a detection signal DETECT2 according to the detection result (S12).

When the received wireless signal includes a request command, the selection module 28 may generate the switch signal SW2 based on the detection signal DETECT2. In this case, as the second switch 20 is turned off in response to the switch signal SW2, the second antenna ANT2 may be disabled (S14).

If the received wireless signal does not include a request command, the selection module 28 may generate the switch signal SW1 based on the detection signal DETECT2. In this case, as the first switch 18 is turned off according to the switch signal SW1, the first antenna ANT1 may be disabled (S16).

4 is a flowchart illustrating a method of operating an NFC device according to another exemplary embodiment.

Referring to FIG. 4, the antenna selection module 16 may receive a radio signal through the first antenna ANT1 or the second antenna ANT2 (S20).

The frequency detection module 24 may detect whether the frequency of the received wireless signal belongs to the NFC frequency band, and generate the detection signal DETECT1 according to the detection result (S22).

If the received wireless signal does not belong to the NFC frequency band, the selection module 28 may generate the switch signal SW1 based on the detection signal DETECT1. In this case, as the first switch 18 is turned off according to the switch signal SW1, the first antenna ANT1 may be disabled (S24).

If the received radio signal belongs to the NFC frequency band, the request command detection module 26 may determine whether the received radio signal includes a request command (S12).

Steps S12 to S16 shown in FIG. 4 are substantially the same as steps S12 to S16 shown in FIG. 3, and thus description thereof is omitted.

5 is a flowchart illustrating a method of operating an NFC device according to another embodiment of the present invention.

Referring to FIG. 5, the selection module 28 may receive the mode data MDATA from the mode register 22 (S30).

The selection module 28 may determine whether the NFC mode of the NFC device 10 is the reader / writer mode or the initiator mode based on the mode data MDATA (S32).

The selection module 28 receives the mode data MDATA in order to confirm the NFC mode of the NFC device 10, but is not limited thereto.

When the NFC mode is the reader / writer mode or the initiator mode, the selection module 28 may generate the switch signal SW2. In this case, as the second switch 20 is turned off according to the switch signal SW2, the second antenna ANT2 may be disabled (S34).

When the NFC mode is not the reader / writer mode and the initiator mode, that is, when the NFC mode is the card emulation mode or the target mode, the antenna selection module 16 selects the first antenna ANT1 or the second antenna ANT2. The wireless signal may be received (S20).

Steps S12 to S16 shown in FIG. 5 are substantially the same as steps S12 to S16 shown in FIG. 3, and steps S20 to S24 shown in FIG. 5 are substantially the same as steps S20 to S24 shown in FIG. 4. Since the description is the same, the description thereof is omitted.

Although the present invention has been described with reference to one embodiment shown in the drawings, this is merely exemplary, and those skilled in the art will understand that various modifications and equivalent other embodiments are possible therefrom. Therefore, the true technical protection scope of the present invention will be defined by the technical spirit of the appended claims.

10: NFC device 22: mode register
12: NFC module 24: frequency detection module
14: wireless charging module 26: request command detection module
16: antenna selection module 28: selection module
18, 20: switch

Claims (13)

An NFC device capable of performing at least one of near field communication (NFC) or wireless charging,
A first antenna capable of receiving a wireless signal for the NFC;
An NFC module capable of processing a wireless signal received by the first antenna;
A second antenna capable of receiving a wireless signal for wireless charging;
A wireless charging module capable of processing a wireless signal received by the second antenna;
A mode register for storing mode data indicating an NFC mode of the NFC module; And
A selection module for disabling any one of the first antenna and the second antenna based on the mode data,
The selection module,
And an NFC device for disabling the second antenna when the NFC mode is a reader / writer mode or an initiator mode according to the mode data. The method of claim 1,
A first switch connected between the NFC module and the first antenna; And
And a second switch connected between the wireless charging module and the second antenna.
The selection module,
NFC device capable of switching the first switch or the second switch based on the mode data. delete delete An NFC device capable of performing at least one of NFC or wireless charging,
A first antenna capable of receiving a wireless signal for the NFC;
An NFC module capable of processing a wireless signal received by the first antenna;
A second antenna capable of receiving a wireless signal for wireless charging;
A wireless charging module capable of processing a wireless signal received by the second antenna;
A frequency detection module detecting whether a frequency of a radio signal transmitted from the first antenna or the second antenna belongs to an NFC frequency band; And
And a selection module for disabling any one of the first antenna and the second antenna according to a detection result of the frequency detection module. The method of claim 5,
A first switch connected between the NFC module and the first antenna; And
And a second switch connected between the wireless charging module and the second antenna.
The selection module,
NFC device capable of switching the first switch or the second switch in accordance with the detection result of the frequency detection module. The method of claim 5, wherein the selection module,
NFC device for disabling the first antenna when the frequency does not belong to the NFC frequency band. The method of claim 5, wherein the frequency detection module,
The NFC device detects whether the frequency belongs to the NFC frequency band only when the NFC mode of the NFC device is a card emulation mode or a target mode. The method according to claim 6,
And a request command detection module for detecting whether the wireless signal transmitted from the first antenna or the second antenna includes a request command for starting the NFC.
The request command is an NFC device that is the first command sent to start NFC. The method of claim 9, wherein the selection module,
NFC device capable of switching the first switch or the second switch according to whether the radio signal includes the request command. The method of claim 9, wherein the request command detection module,
NFC device for determining whether the radio signal includes the request command only when the frequency belongs to the NFC frequency band. delete The method of claim 9, wherein the selection module,
When the NFC mode of the NFC device is a reader / writer mode or initiator mode, the second antenna is disabled,
If the NFC mode is a card emulation mode or a target mode and the frequency does not belong to the NFC frequency band, disable the first antenna,
Disable the second antenna when the NFC mode is the card emulation mode or the target mode and the frequency belongs to the NFC frequency band and the wireless signal includes the request command,
And disabling the first antenna when the NFC mode is the card emulation mode or the target mode and the frequency belongs to the NFC frequency band and the wireless signal does not include the request command.

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