KR20120110662A - Mobile terminal and method for controlling of the same - Google Patents

Abstract

PURPOSE: A portable terminal and control method thereof are provided to embody a wireless communication function and a wireless charging function using one antenna. CONSTITUTION: An NFC(Near Field Communication) reception unit(31) processes an NFC operation frequency signal inputted from a roof antenna. A wireless charging reception unit(41) processes a wireless charging frequency signal inputted from the roof antenna. A switch connects to the transmission and reception terminal of the roof antenna. The switch converts the transmission route of an input signal received from the roof antenna into the NFC reception unit or the wireless charging reception unit. [Reference numerals] (180) Control unit

Description

Mobile terminal and method for controlling mobile terminal

The present invention relates to a mobile terminal and a control method of the mobile terminal.

The terminal may be classified into a mobile terminal (mibile / portable terminal) and a stationary terminal according to the mobility. The mobile terminal may be classified into a handheld terminal and a vehicle mount terminal according to whether a user can carry it.

Terminals are being implemented in the form of a multimedia player (Multimedia Player) having a complex function, such as taking pictures or videos, playing music or video files, playing games, receiving broadcasts as functions are diversified.

Various new attempts have been made in terms of hardware or software to implement the complex functions of such multimedia devices. For example, a user interface environment is provided for a user to search for or select a function easily and conveniently.

In addition, various design forms are required for a mobile terminal, and the design form includes structural changes and improvements for a user to use the mobile terminal more conveniently. One of such structural changes and improvements can be considered for antennas.

An object of the present invention is to provide a mobile terminal and a method of controlling the mobile terminal capable of implementing both a short range wireless communication function and a wireless charging function through one antenna.

The technical objects to be achieved by the present invention are not limited to the technical problems mentioned above. In addition, other technical problems to be achieved by the present invention will be clearly understood by those skilled in the art from the following description.

The mobile terminal according to an aspect of the present invention may include a loop antenna, an NFC receiver, a wireless charging receiver, and a switch.

The loop antenna may receive an input signal of any one of a Near Field Communication (NFC) operating frequency signal and a wireless charging frequency signal.

The NFC receiver may process the NFC operating frequency signal input from a loop antenna.

The wireless charging receiver may process the wireless charging frequency signal input from the loop antenna.

The switch may be connected to a transmission / reception terminal of the loop antenna to switch a transmission path of the input signal received by the loop antenna to either the NFC receiver or the wireless charging receiver.

The mobile terminal may include a control unit for controlling the switching operation of the switch by monitoring the frequency of the signal input to the loop antenna.

The controller may switch the transmission path to the NFC receiver when the frequency of the input signal is the NFC operating frequency, and switch the transmission path to the wireless charge receiver when the frequency of the input signal is the wireless charging operation frequency. have.

The loop antenna may be connected to an input terminal of the NFC receiver by making a series resonance with a capacitor, and a capacitance value of the capacitor may have a value for resonating at a specific frequency together with an inductance of the loop antenna.

The loop antenna may be a multi turn antenna.

The loop antenna may be formed of a ferrite core.

According to another aspect of the present invention, a mobile terminal may include a loop antenna, an NFC receiver, and a wireless charging receiver.

The loop antenna may receive an input signal including a Near Field Communication (NFC) operating frequency signal and a wireless charging frequency signal.

The NFC receiver may be connected to a transceiver of the loop antenna to receive an NFC operating frequency signal among the input signals.

The wireless charging receiver may be connected to a transmitting and receiving end of the loop antenna to receive a wireless power signal from the loop antenna, and supply charging power to a coupled battery or an external device.

The loop antenna may be connected to an input terminal of the NFC receiver by making a series resonance with a capacitor, and a capacitance value of the capacitor may have a value for resonating at a specific frequency together with an inductance of the loop antenna.

In addition, a low pass filter may be further included between the capacitor and the input terminal of the NFC receiver.

The low pass filter may filter a wireless charging frequency signal among input signals input to the loop antenna and transmit only an NFC operating frequency signal to the NFC receiver.

According to still another aspect of the present invention, there is provided a method of controlling a mobile terminal, comprising: receiving an input signal of at least one of a near field communication (NFC) operating frequency signal and a wireless charging frequency signal through a loop antenna; Monitoring the frequency of the input signal; And switching a transmission path of the input signal to either an NFC receiver or a wireless charging receiver by controlling a switch electrically connected to a transmission / reception terminal of the loop antenna according to the monitoring result.

The switching may include switching the transmission path of the input signal to the NFC receiver if the frequency of the input signal is the NFC operating frequency, and wirelessly charging the transmission path if the frequency of the input signal is the wireless charging operation frequency. Switch to the receiver.

According to the mobile terminal and the method for controlling the mobile terminal according to the present invention, the following effects are obtained.

According to the present invention, without having to have an antenna for each of the NFC communication module and the wireless charging module built in the mobile terminal, by using a common antenna that can be used for both NFC communication and wireless charging, both of the above functions Can be implemented.

In addition, by using the one common antenna, there is an advantage in the mounting space inside the mobile terminal and cost reduction effect.

1 shows a wireless transmission and reception and charging system according to an embodiment of the present invention.
2 is a block diagram of a mobile terminal 100 according to an embodiment of the present invention.
3A is a front perspective view of an example of a mobile terminal or a portable terminal according to the present invention.
FIG. 3B is a rear perspective view of the portable terminal shown in FIG. 3A.
FIG. 4 is a diagram illustrating in more detail the system shown in FIG. 1 for performing near field communication and wireless charging through one antenna.
5 is a view schematically illustrating a part of a wireless communication unit of a mobile terminal according to an embodiment of the present invention.
6A and 6B illustrate examples of antenna wiring of the wireless communication unit shown in FIG. 5.
7 illustrates an antenna connection structure of a mobile terminal according to another embodiment of the present invention.
8A-8D illustrate an exemplary layout of a loop antenna of a mobile terminal according to an embodiment of the present invention.
9 is a flowchart of a control method of a mobile terminal according to another embodiment of the present invention.

The foregoing objects, features and advantages of the present invention will become more apparent from the following detailed description taken in conjunction with the accompanying drawings. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Reference will now be made in detail to the preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings. Like numbers refer to like elements throughout. In the following description, well-known functions or constructions are not described in detail since they would obscure the invention in unnecessary detail.

Hereinafter, a mobile terminal 100 according to the present invention will be described in detail with reference to the drawings. The suffix "module" and " part "for the components used in the following description are given or mixed in consideration of ease of specification, and do not have their own meaning or role.

The mobile terminal 100 described herein includes a mobile phone, a smart phone, a laptop computer, a digital broadcasting terminal, a personal digital assistant (PDA), a portable multimedia player (PMP), navigation, and a MID (Mobile). Internet Device) may be included.

The term "wireless power" or "wireless charging" can be used herein to mean any form of energy associated with an electric field, magnetic field, electromagnetic field, etc., transmitted from the transmitter to the receiver without the use of physical electromagnetic conductors.

In the present invention, for example, a ferrite may be used as the antenna used to transmit and receive the wireless power. Ferrite materials include ceramics in the form of M ₀ -Fe ₂ O ₃ , where MO can be a combination of divalent metals such as zinc, nickel, manganese and copper oxide. Common ferrites may include MnZa, NiZn and other Ni based ferrites.

1 shows a wireless transmission and reception and charging system according to an embodiment of the present invention. The wireless transmission and reception system 1 may include a first external device 10, a second external device 20, and a mobile terminal 100.

The mobile terminal 100 performs near field communication (for example, NFC communication) with the first external device 10, and is coupled to a radiation field by the second external device 20 to be connected to a second external device. Wireless charging power may be supplied by 20.

The mobile terminal 100 may perform Near Field Communication (NFC) data communication with the first external device 10. For example, the mobile terminal 100 and the first external device 10 may each have an NFC module (not shown) to perform NFC communication within a predetermined distance. The mobile terminal 100 may perform a function as a reader and a tag, respectively, in relation to the first external device 10.

That is, the NFC module (not shown) of the mobile terminal 100 may store predetermined information including user information for identifying a user in advance, and the first external device 10 may include an NFC module (not shown) of the mobile terminal 100. Predetermined information stored in the storage device) can be obtained and processed. In addition, the mobile terminal 100 may acquire and process information from the first external device 10 through NFC communication.

Meanwhile, the mobile terminal 100 performs near field communication with the first external device 10 and is coupled to the radiation field 25 of the second external device 20 to receive power by wireless charging. have. Hereinafter, the configuration of the mobile terminal 100 according to an embodiment of the present invention will be described in more detail with reference to FIGS. 2 to 3B.

2 is a block diagram of a mobile terminal 100 according to an embodiment of the present invention.

The mobile terminal 100 includes a wireless communication unit 110, an A / V input unit 120, a user input unit 130, a sensing unit 140, an output unit 150, a memory unit 160, and an interface. The unit 170, the controller 180, and the power supply unit 190 may be included. The components shown in FIG. 2 are not essential, so that the mobile terminal 100 with more components or fewer components may be implemented.

Hereinafter, the components will be described in order.

The wireless communication unit 110 may include one or more modules for enabling wireless communication between the mobile terminal 100 and the wireless communication system or between the mobile terminal 100 and the network in which the mobile terminal 100 is located. For example, the wireless communication unit 110 may include a broadcast receiving module 111, a mobile communication module 112, a wireless Internet module 113, a short range communication module 114, and a location information module 115 .

The broadcast receiving module 111 receives a broadcast signal and / or broadcast related information from an external broadcast management server through a broadcast channel.

The broadcast channel may include a satellite channel and a terrestrial channel. The broadcast management server may refer to a server for generating and transmitting broadcast signals and / or broadcast related information, or a server for receiving broadcast signals and / or broadcast related information generated by the broadcast management server and transmitting the generated broadcast signals and / or broadcast related information. The broadcast signal may include a TV broadcast signal, a radio broadcast signal, a data broadcast signal, and a broadcast signal in which a data broadcast signal is combined with a TV broadcast signal or a radio broadcast signal.

The broadcast-related information may refer to a broadcast channel, a broadcast program, or information related to a broadcast service provider. The broadcast related information may also be provided through a mobile communication network. In this case, it may be received by the mobile communication module 112.

The broadcast related information may exist in various forms. For example, it may exist in the form of Electronic Program Guide (EPG) of Digital Multimedia Broadcasting (DMB) or Electronic Service Guide (ESG) of Digital Video Broadcast-Handheld (DVB-H).

The broadcast receiving module 111 receives broadcasting signals using various broadcasting systems. In particular, the broadcasting receiving module 111 may be a Digital Multimedia Broadcasting-Terrestrial (DMB-T), a Digital Multimedia Broadcasting-Satellite (DMB-S) Only Digital Broadcast-Handheld (DVB-H), Integrated Services Digital Broadcast-Terrestrial (ISDB-T), and the like. Of course, the broadcast receiving module 111 may be adapted to other broadcasting systems that provide broadcast signals as well as the digital broadcasting system described above.

The broadcast signal and / or broadcast related information received through the broadcast receiving module 111 may be stored in the memory unit 160.

The mobile communication module 112 transmits and receives radio signals to at least one of a base station, an external terminal, and a server on a mobile communication network. The wireless signal may include various types of data depending on a voice call signal, a video call signal or a text / multimedia message transmission / reception.

The wireless Internet module 113 refers to a module for wireless Internet access, and the wireless Internet module 113 can be embedded in the mobile terminal 100 or externally. Wireless Internet technologies may include Wireless LAN (Wi-Fi), Wireless Broadband (Wibro), World Interoperability for Microwave Access (Wimax), High Speed Downlink Packet Access (HSDPA), and the like.

The short range communication module 114 refers to a module for short range communication. Bluetooth, Radio Frequency Identification (RFID), Infrared Data Association (IrDA), Ultra Wideband (UWB), ZigBee, Near Field Communication (NFC), and the like may be used as a short range communication technology.

The location information module 115 is a module for checking or obtaining the location of the mobile terminal 100. The location information module 115 may obtain location information using a global navigation satellite system (GNSS). Here, the Global Positioning System (GNSS) is a term used to describe the radionavigation satellite systems in which certain types of radionavigation receivers orbiting the Earth are transmitting reference signals that can determine their position near the surface or ground surface . The Global Positioning System (GNSS) includes Global Positioning System (GPS) in the United States, Galileo in Europe, GLONASS (Global Orbiting Navigational Satelite System) in Russia, COMPASS in China and Japan QZSS (Quasi-Zenith Satellite System), which is operated by the Ministry of Land, Infrastructure and Transport.

As a representative example of the GNSS, the location information module 115 may be a Global Position System (GPS) module. The GPS module calculates information on a distance (distance) from three or more satellites to a point (object), information on a time when the distance information is measured, and then applies a trigonometric method to the calculated distance information, Dimensional position information according to latitude, longitude, and altitude with respect to a point (object) in the three-dimensional space. Further, a method of calculating position and time information using three satellites and correcting the error of the calculated position and time information using another satellite is also used. The GPS module continuously calculates the current position in real time, and calculates velocity information using the current position.

Referring to FIG. 2, an A / V (Audio / Video) input unit 120 is for inputting an audio signal or a video signal, and may include a camera 121 and a microphone 122. The camera 121 processes image frames such as still images or moving images obtained by the image sensor in the video call mode or the photographing mode. The processed image frame can be displayed on the display unit 151. [

The image frame processed by the camera 121 may be stored in the memory unit 160 or may be transmitted to the outside through the wireless communication unit 110. [ The camera 121 may be equipped with two or more cameras according to the configuration of the terminal.

The microphone 122 receives an external sound signal through a microphone in a communication mode, a recording mode, a voice recognition mode, or the like, and processes it as electrical voice data. The processed voice data can be converted into a form that can be transmitted to the mobile communication base station through the mobile communication module 112 when the voice data is in the call mode, and output. Various noise reduction algorithms may be implemented in the microphone 122 to remove noise generated in receiving an external sound signal.

The user input unit 130 generates input data for a user to control the operation of the terminal. The user input unit 130 may include a key pad dome switch, a touch pad (static pressure / capacitance), a jog wheel, a jog switch, and the like.

The sensing unit 140 may sense the position of the mobile terminal 100 such as the open / close state of the mobile terminal 100, the position of the mobile terminal 100, the presence of the user, the orientation of the mobile terminal 100, And generates a sensing signal for controlling the operation of the mobile terminal 100. For example, when the mobile terminal 100 is in the form of a slide phone, it may sense whether the slide phone is opened or closed. In addition, it may be responsible for a sensing function related to whether the power supply unit 190 is powered on, whether the interface unit 170 is connected to an external device, and the like. The sensing unit 140 may include a proximity sensor 141.

The output unit 150 may include a display unit 151, an audio output module 152, an alarm unit 153, and a haptic module 154, for example, for generating output related to visual, auditory, have.

The display unit 151 displays and outputs information processed by the mobile terminal 100. For example, when the mobile terminal 100 is in a call mode, the mobile terminal 100 displays a user interface (UI) or a graphic user interface (GUI) related to the call. When the mobile terminal 100 is in the video communication mode or the photographing mode, the photographed and / or received video or UI and GUI are displayed.

The display unit 151 may be a liquid crystal display, a thin film transistor-liquid crystal display, an organic light-emitting diode, a flexible display, a three-dimensional display 3D display).

Some of these displays may be transparent or light transmissive so that they can be seen through. This may be referred to as a transparent display. A typical example of the transparent display is a transparent LCD or the like. The rear structure of the display unit 151 may also be of a light transmission type. With this structure, the user can see an object located behind the terminal body through the area occupied by the display unit 151 of the terminal body.

According to an implementation form of the mobile terminal 100, two or more display units 151 may exist. For example, in the mobile terminal 100, a plurality of display portions may be spaced apart from one another, or may be disposed integrally with one another, and may be disposed on different surfaces, respectively.

The display unit 151 is connected to a display unit 151 and a sensor for sensing a touch operation (hereinafter, referred to as 'touch sensor') having a mutual layer structure It can also be used as an input device. The touch sensor may have the form of, for example, a touch film, a touch sheet, a touch pad, or the like.

The touch sensor may be configured to convert a change in a pressure applied to a specific portion of the display unit 151 or a capacitance generated in a specific portion of the display unit 151 into an electrical input signal. The touch sensor can be configured to detect not only the position and area to be touched but also the pressure at the time of touch.

If there is a touch input to the touch sensor, the corresponding signal (s) is sent to the touch controller. The touch controller processes the signal (s) and transmits the corresponding data to the controller 180. As a result, the controller 180 can know which area of the display unit 151 is touched.

Referring to FIG. 2, a proximity sensor 141 may be disposed in an inner region of the mobile terminal 100 surrounded by the touch screen or near the touch screen. The proximity sensor 141 refers to a sensor that detects the presence of an object approaching a predetermined detection surface or an object existing in the vicinity of the detection surface without mechanical contact using an electromagnetic force or an infrared ray. The proximity sensor has a longer life span than the contact sensor and its utilization is also high.

Examples of the proximity sensor include a transmission photoelectric sensor, a direct reflection photoelectric sensor, a mirror reflection photoelectric sensor, a high frequency oscillation proximity sensor, a capacitive proximity sensor, a magnetic proximity sensor, and an infrared proximity sensor.

And to detect the proximity of the pointer by the change of the electric field along the proximity of the pointer when the touch screen is electrostatic. In this case, the touch screen (touch sensor) may be classified as a proximity sensor.

Hereinafter, for convenience of explanation, the act of allowing the pointer to be recognized without being in contact with the touch screen so that the pointer is located on the touch screen is referred to as a "proximity touch", and the touch The act of actually touching the pointer on the screen is called "contact touch." The position where the pointer is proximately touched on the touch screen means a position where the pointer is vertically corresponding to the touch screen when the pointer is touched.

The proximity sensor detects a proximity touch and a proximity touch pattern (e.g., a proximity touch distance, a proximity touch direction, a proximity touch speed, a proximity touch time, a proximity touch position, a proximity touch movement state, and the like). Information corresponding to the sensed proximity touch operation and proximity touch pattern may be output on the touch screen.

The audio output module 152 may output audio data received from the wireless communication unit 110 or stored in the memory unit 160 in a call signal reception mode, a call mode or a recording mode, a voice recognition mode, a broadcast reception mode, The sound output module 152 outputs an acoustic signal related to a function (e.g., a call signal reception sound, a message reception sound, etc.) performed in the mobile terminal 100. The audio output module 152 may include a receiver, a speaker, a buzzer, and the like. Also, the sound output module 152 may output sound through the earphone jack 116. The user can connect the earphone to the earphone jack 116 to hear the sound output.

The alarm unit 153 outputs a signal for notifying the occurrence of an event of the mobile terminal 100. Examples of events generated in the mobile terminal 100 include call signal reception, message reception, key signal input, touch input, and the like. The alarm unit 153 may output a signal for notifying the occurrence of an event in a form other than the video signal or the audio signal, for example, vibration. The video signal or the audio signal may also be output through the display unit 151 or the audio output module 152.

The haptic module 154 generates various tactile effects that the user can feel. A typical example of the haptic effect generated by the haptic module 154 is vibration. The intensity and pattern of vibration generated by the haptic module 154 can be controlled. For example, different vibrations may be synthesized and output or sequentially output.

In addition to the vibration, the haptic module 154 may be configured to perform various functions such as an effect of stimulation by a pin arrangement vertically moving with respect to a contact skin surface, an effect of stimulation by air spraying force or suction force through a jet opening or a suction opening, A variety of tactile effects such as an effect of stimulation through contact of an electrode, an effect of stimulation by an electrostatic force, and an effect of reproducing a cold sensation using a heat absorbing or exothermic element can be generated.

The haptic module 154 may not only deliver the haptic effect through direct contact, but also implement the haptic effect through the muscle sense of the user's finger or arm. The haptic module 154 may include two or more haptic modules 154 according to the configuration of the portable terminal 100.

The memory unit 160 may store a program for the operation of the controller 180 and temporarily store input / output data (e.g., a phone book, a message, a still image, a moving picture, etc.). The memory unit 160 may store data related to vibration and sound of various patterns outputted when a touch is input on the touch screen.

The memory unit 160 may be a flash memory type, a hard disk type, a multimedia card micro type, a card type memory (for example, SD or XD memory) (Random Access Memory), SRAM (Static Random Access Memory), ROM (Read Only Memory), EEPROM (Electrically Erasable Programmable Read-Only Memory), PROM A disk, and / or an optical disk. The mobile terminal 100 may operate in association with a web storage that performs a storage function of the memory unit 160 on the Internet.

The interface unit 170 serves as a path for communication with all external devices connected to the mobile terminal 100. The interface unit 170 receives data from an external device or receives power from the external device to transfer the data to each component in the mobile terminal 100 or to transmit data in the mobile terminal 100 to an external device. For example, a wired / wireless headset port, an external charger port, a wired / wireless data port, a memory card port, a port for connecting a device having an identification module, an audio I / O port, A video input / output (I / O) port, an earphone port, and the like may be included in the interface unit 170.

The identification module is a chip for storing various information for authenticating the use right of the mobile terminal 100 and includes a user identification module (UIM), a subscriber identity module (SIM), a general user authentication module A Universal Subscriber Identity Module (USIM), and the like. Devices with identification modules (hereinafter referred to as "identification devices") can be manufactured in a smart card format. Accordingly, the identification device can be connected to the terminal 100 through the port.

The interface unit may be a passage through which power from the cradle is supplied to the mobile terminal 100 when the mobile terminal 100 is connected to an external cradle, or various command signals inputted from the cradle by a user are input to the mobile terminal. It may be a passage that is delivered to (100). Various command signals or power input from the cradle may be operated as signals for recognizing that the mobile terminal 100 is correctly mounted on the cradle.

The controller 180 typically controls the overall operation of the mobile terminal 100. For example, voice communication, data communication, video communication, and the like. The control unit 180 may include a multimedia module 181 for multimedia playback. The multimedia module 181 may be implemented in the control unit 180 or may be implemented separately from the control unit 180. [

The controller 180 may perform a pattern recognition process for recognizing handwriting input or drawing input performed on the touch screen as characters and images, respectively.

The power supply unit 190 receives an external power source and an internal power source under the control of the controller 180 to supply power for operation of each component.

The various embodiments described herein may be embodied in a recording medium readable by a computer or similar device using, for example, software, hardware, or a combination thereof.

According to a hardware implementation, the embodiments described herein may be implemented as application specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), field programmable gate arrays May be implemented using at least one of processors, controllers, micro-controllers, microprocessors, and electrical units for performing functions. In some cases, And may be implemented by the control unit 180.

According to a software implementation, embodiments such as procedures or functions may be implemented with separate software modules that perform at least one function or operation. The software code may be implemented by a software application written in a suitable programming language. Also, the software codes may be stored in the memory unit 160 and executed by the control unit 180. [

3A is a perspective view of an example of a mobile terminal or a mobile terminal according to the present invention.

The disclosed mobile terminal 100 has a bar-shaped terminal body. However, the present invention is not limited thereto, and can be applied to various structures such as a slide type, a folder type, a swing type, and a swivel type in which two or more bodies are relatively movably coupled.

The body includes a case (a casing, a housing, a cover, and the like) which forms an appearance. In this embodiment, the case may be divided into a front case 101 and a rear case 102. [ A variety of electronic components are embedded in the space formed between the front case 101 and the rear case 102. At least one intermediate case may be additionally disposed between the front case 101 and the rear case 102. [

The cases may be formed by injecting synthetic resin or may be formed of a metal material, for example, a metal material such as stainless steel (STS) or titanium (Ti).

The display unit 151, the audio output unit 152, the camera 121, the user input units 130/131 and 132, the microphone 122, and the interface 170 may be disposed in the terminal body, mainly the front case 101. have.

The display unit 151 occupies most of the main surface of the front case 101. A sound output unit 152 and a camera 121 are disposed in an area adjacent to one end of both ends of the display unit 151 and a user input unit 131 and a microphone 122 are disposed in an area adjacent to the other end. The user input unit 132, the interface 170, and the like are disposed on the side surfaces of the front case 101 and the rear case 102.

The user input unit 130 is operated to receive a command for controlling the operation of the portable terminal 100 and may include a plurality of operation units 131 and 132.

The manipulation units 131 and 132 may also be collectively referred to as manipulating portions, and may be employed in any manner as long as the user operates the tactile manner with a tactile feeling.

The contents input by the manipulation units 131 and 132 may be variously set. For example, the first operation unit 131 receives commands such as start, end, scroll, and the like, and the second operation unit 132 controls the size of the sound output from the sound output unit 152 or the size of the sound output from the display unit 151 To the touch recognition mode of the touch screen.

FIG. 3B is a rear perspective view of the portable terminal shown in FIG. 3A.

Referring to FIG. 3B, a camera 121 'may be further mounted on the rear surface of the terminal body, that is, the rear case 102. The camera 121 'may have a photographing direction substantially opposite to the camera 121 (see FIG. 3A), and may be a camera having different pixels from the camera 121.

For example, the camera 121 may have a low pixel so that the face of the user can be photographed and transmitted to the other party in case of a video call or the like, and the camera 121 ' It is preferable to have a large number of pixels. The cameras 121 and 121 'may be installed in the terminal body such that they can be rotated or popped up.

A flash 123 and a mirror 124 are further disposed adjacent to the camera 121 '. The flash 123 illuminates the subject when the subject is photographed by the camera 121 '. The mirror 124 allows the user to illuminate the user's own face or the like when the user intends to shoot himself / herself (self-photographing) using the camera 121 '.

An acoustic output 152 'may be additionally disposed on the rear surface of the terminal body. The sound output unit 152 'may implement the stereo function together with the sound output unit 152 (see FIG. 3A), and may be used for the implementation of the speakerphone mode during a call.

In addition to the antenna for a call or the like, a broadcast signal reception antenna 124 may be additionally disposed on the side of the terminal body. The antenna 124 constituting a part of the broadcast receiving module 111 (see FIG. 1) may be installed to be able to be drawn out from the terminal body.

A power supply unit 190 for supplying power to the portable terminal 100 is mounted on the terminal body. The power supply unit 190 may be embedded in the terminal body or may be directly detachable from the outside of the terminal body.

The rear case 102 may further include a touch pad 135 for sensing a touch. The touch pad 135 may also be of a light transmission type like the display unit 151. [ In this case, if the display unit 151 is configured to output time information on both sides, the time information can be recognized through the touch pad 135 as well. The information output on both sides may be all controlled by the touch pad 135. [ Alternatively, a display may be additionally mounted on the touch pad 135, and a touch screen may be disposed on the rear case 102.

The touch pad 135 operates in association with the display unit 151 of the front case 101. The touch pad 135 may be disposed parallel to the rear of the display unit 151. The touch pad 135 may have a size equal to or smaller than that of the display unit 151.

FIG. 4 is a diagram illustrating in more detail the system shown in FIG. 1 for performing near field communication and wireless charging through one antenna.

Referring to FIG. 4, the mobile terminal 100 may include an NFC communication unit 200 for performing NFC communication with an external electronic device. In addition, the mobile terminal 100 may include a wireless charging unit 300 that can receive power from the external electronic device through wireless charging. In addition, in order to perform the NFC communication and wireless charging may be provided with an antenna 110 that can receive a predetermined signal from the external device (10, 20) and transmit to the NFC communication unit 200 or the wireless charging unit 300, respectively. have.

The first external device 10 of the external devices may include a device that performs the NFC transmission and reception function. The second external device 20 may include a device capable of performing a wireless charging transmission / reception function. Meanwhile, in FIG. 4, the first external device 10 and the second external device 20 are described as NFC communication devices and wireless charging devices, respectively, but one external device includes both the NFC communication function and the wireless charging function. It may be a device of.

The wireless communication unit 110 of the mobile terminal 100 may receive a predetermined frequency signal from at least one of the first external antenna 11 and the second external antenna 21.

For example, the wireless communication unit 110 may receive a frequency signal of 13.5Mhz band to perform NFC communication from the first external antenna 11. Near Field Communication (NFC), a field of RFID, is a short-range wireless communication that uses a frequency of 13.56 MHz and transmits data at short distances at low power and is defined as a standard in ISO 18092. In addition to the frequency of 13.56MHz, NFC may perform short-range wireless communication with various frequency signals though 125kHZ, 135kHZ and 900kHZ.

In addition, the wireless communication unit 110 may receive a frequency signal of the 100Khz band to perform wireless charging from the second external antenna 21. The wireless charging operation frequency for performing the wireless charging is not limited to the aforementioned 100Khz band.

There is a difference between an operating frequency required for performing NFC communication and an operating frequency required for performing wireless charging. Accordingly, the wireless communication unit 110 on the mobile terminal 100 according to an embodiment of the present invention may be provided with a means for transferring the input signal to the NFC communication unit 200 or the wireless charging unit 300, respectively.

Hereinafter, the structure of the wireless communication unit 110 for performing an NFC communication function and a wireless charging function having different operating frequencies through the mobile terminal 100 having one antenna will be described in more detail.

FIG. 5 schematically illustrates a part of a wireless communication unit of a mobile terminal according to an embodiment of the present invention, and FIGS. 6A and 6B illustrate examples of antenna connection of the wireless communication unit shown in FIG. 5.

5 to 6B, the wireless communication unit 110 of the mobile terminal 100 may include an antenna 116 that receives a predetermined frequency signal from an external stationary device.

The antenna 116 may be configured as a loop antenna 116 as a magnetic antenna. The loop antenna may be configured to include an air core or a physical core, such as a ferrite core. The air core loop antenna may be coupled to external physical devices disposed around the core. The air core loop antenna may also be configured by placing other components in the core region.

The controller 180 may monitor the frequency input to the loop antenna 116 at predetermined intervals. In addition, the switch SW is connected to a transmission / reception end of the loop antenna 116 and the switching operation of the switch SW is controlled to terminate the loop antenna 116 in the NFC receiver 31 or the wireless charging unit 310. You can connect to either.

The controller 180 may monitor a frequency of a signal input to the loop antenna 116 through an analog digital converter (ADC). For example, when the frequency of the input signal corresponds to the operating frequency for short-range communication of 13.5Mhz band, the switch (SW) is controlled to connect to the NFC wireless receiver 210.

In addition, when the frequency of the signal input to the loop antenna 116 corresponds to the operating frequency of the 100Khz band for wireless charging, the controller 180 controls the switch (SW) to connect to the wireless charging receiver 41. do.

Meanwhile, before the predetermined frequency signal f is input, the switch SW may be connected to either the NFC receiver 31 or the wireless charging receiver 41. For example, in a state in which the switch SW is connected to the NFC receiver 31, the controller 180 monitors a frequency input to the loop antenna 116, and when the frequency is 13.5Mhz, The switching state of the switch SW may be controlled not to be changed, and if the corresponding frequency is 100 kHz, the switch SW may be controlled to be connected to the wireless charging receiver 41 from the NFC receiver 31.

In the state where the switch SW is connected to the wireless charging receiver 41, the switch control of the controller 180 according to the frequency of the input signal may be the reverse of the above-described example.

The controller 180 may control the switch SW to return to its original state when there is no signal input for a predetermined period (for example, 1 second). That is, the controller 180 may switch the loop antenna 116 to the wireless charging receiver 41 according to the frequency of the input signal while the loop antenna 116 is connected to the NFC receiver 31, and after the switching As a result of monitoring the input signal, if there is no signal input for a predetermined period (for example, 1 second), the switch SW may be controlled to return to the NFC receiver 31 again.

Meanwhile, before the predetermined frequency signal f is input, the switch SW may not be connected to either the NFC receiver 31 or the wireless charging receiver 41. In this case, the controller 180 monitors the frequency of the signal input to the loop antenna 116, and according to the monitoring result, the controller 180 controls the loop antenna 116 to either the NFC receiver 31 or the wireless charging receiver 41. You can switch to one.

FIG. 6A illustrates that the switch SW is connected to the NFC receiver 31 under the control of the controller 180 when the frequency input to the loop antenna 116 is 13.5Mhz band (hereinafter, referred to as an 'NFC operating frequency'). It shows the state.

Referring to FIG. 6A, the NFC transceiver 10 (hereinafter, referred to as a “first external device”) may include an antenna 11 for transmitting and receiving predetermined data with the mobile terminal 100. The antenna 11 of the first external device 10 is a magnetic antenna having the same shape as the antenna of the mobile terminal 100 and may be a loop antenna.

The first external device 10 may periodically output a predetermined frequency signal to the transmission and reception terminal.

The predetermined frequency signal output by the first external device 10 is applied to a capacitor (not shown) of the loop antenna 11 and the loop antenna 11. The capacitor (not shown) of the loop antenna 11 and the loop antenna 11 are resonated with a predetermined frequency signal output by the first external device 10 (in accordance with the structure of the capacitor and the loop antenna, The resonance current may flow through the loop antenna 11 of the first external device 10, and a magnetic field generated by the resonance current may be generated in the loop antenna 11.

In this state, when the mobile terminal 100 approaches the first external device 10 (for example, within about 20 cm), the magnetic field generated by the loop antenna 11 may generate a loop antenna of the mobile terminal 100. Resonance occurs in the capacitors C1 and C2 and the loop antenna 116 while being guided to 116, and a resonant current flows through the loop antenna 116. The resonance current is input to the terminal of the NFC receiver 31.

When the resonance current is input to the NFC receiver 31, predetermined information stored in advance on an NFC chip (not shown) connected to the NFC receiver 31 may include, for example, mobile terminal user information. 100 may be transmitted to the NFC transmission and reception terminal (Tn). The process of transferring the NFC-related information from the mobile terminal 100 to the first external device 10 may include an NFC receiver 31 through a loop antenna 116 of the mobile terminal 100 from the first external device 10. The same process as the predetermined information is delivered to.

Meanwhile, although FIG. 6A illustrates the first external device 10 and the mobile terminal 100 separately, the two devices may operate as a reader and a tag mode, respectively.

In the above description, after the mobile terminal 100 receives the NFC operating frequency signal from the first external device 10, the loop antenna 116 is controlled through a switch (SW) control according to the frequency (NFC operating frequency) of the input signal. The process of performing NFC communication in the switched state to the NFC receiver 31 has been described as an example. Hereinafter, when the frequency of the input signal corresponds to the wireless charging operation frequency (for example, 100Khz), the switching operation of the switch SW and the power transfer process by wireless charging after the switching operation will be described.

6B, when the frequency input to the loop antenna 116 is a 100 kHz band (hereinafter referred to as a 'wireless charging operation frequency'), the switch SW is controlled by the wireless charging receiver 41 under the control of the controller 180. It shows the connected state.

Referring to FIG. 6B, the wireless charging transceiver 20 (hereinafter referred to as a “second external device”) may include an antenna 21 for transmitting energy, and the antenna 21 may be a mobile terminal 100. It may have the same form as the loop antenna 116 provided in the.

The loop antenna 116 of the mobile terminal 100 may form a loop to resonate at the wireless charging operation frequency (for example, 100 kHz band), and may transmit power wirelessly received to the wireless charging receiver 41. have.

The wireless charging receiver 41 may provide a power signal transmitted through the loop antenna 116 to the battery 51 or another electronic device connected to the wireless charging receiver 41.

Meanwhile, the wireless charging receiver 41 is positioned between the wireless charging receiver 41 and the battery 51 and has a matching circuit 42 for matching the impedance of the wireless charging receiver 41 to the loop antenna 116. It may further include.

In addition, the wireless charging receiver 41 may further include a rectifier 43 for rectifying the RF energy signal received through the loop antenna 116 into a DC signal at the interface between the wireless charging receiver 41 and the battery 51. have.

In addition, when the device coupled to the rear end of the wireless charging receiver 41 is a charging device other than a general battery, converting the rectified RF energy signal into an energy potential (eg, a voltage) compatible with the charging device. It may further include a DC-DC converter (not shown).

6A and 6B show a state in which the switch SW is connected to the input terminal Tn of the NFC receiver 31 or the input terminal Tw of the wireless charging receiver, respectively, according to the frequency of the signal input through the loop antenna 116. However, the NFC receiver 31 and the wireless charging receiver 41 is provided in one mobile terminal 100, the state is switched only in accordance with the frequency of the input signal.

Although not shown in FIG. 6B, the second external device 20 may include an oscillator, a power amplifier, a filter, and a matching circuit. The oscillator can generate the desired frequency. The signal generated by the oscillator may be amplified by a power amplifier, and the filter may filter signals of an unwanted frequency. In addition, a matching circuit for matching the impedance of the second external device 20 to the antenna 21 may be included.

7 illustrates an antenna connection structure of a mobile terminal according to another embodiment of the present invention.

Referring to FIG. 7, the input terminal of the NFC receiver 32 and the input terminal of the wireless charging receiver 42 are connected to the transmission and reception terminal Tc of the loop antenna 116, respectively.

The frequency signal input to the loop antenna 116 may include both an NFC operating frequency f1 and a wireless charging frequency signal f2, and the two operating frequency signals f1 and f2 are transmitted and received at the loop antenna 116. At (Tc) is branched to the NFC receiver 32 and the wireless charging receiver 42.

At this time, the signal input to the input terminal of the wireless charging receiver 41 is input with the NFC operating frequency f1 and the wireless charging frequency f2, but the NFC operating frequency signal at the input terminal of the wireless charging receiver 41 will be ignored. The noise effect is small enough. Therefore, the input terminal of the wireless charging receiver 41 does not need to have a separate filter for removing the NFC operating frequency (f1) signal.

However, the NFC operating frequency signal corresponds to a small signal of a relatively high frequency (13.5Mhz) in order to identify predetermined information such as user information of the mobile terminal, and the signal input to the NFC receiver 32 is an NFC operating frequency signal. It is preferable that the remaining frequency part except for the signal is removed.

Therefore, a low pass filter LPF is provided between the input terminals N1 and N2 of the NFC receiver and the transmission and reception terminals T1 and T2 of the loop antenna. The low pass filter may control the wireless charging operation frequency (f2, 100Khz band) and transmit only the NFC operating frequency f1 signal to the NFC receiver 32.

That is, the loop antenna 116 is a capacitor C1 connected in series with the terminal of the loop antenna 116 to resonate at or near the same frequency as the antenna 11 of the first external device transmitting the NFC operating frequency signal. Resonant frequency matching is performed by using C2 and the two input frequency signals f1 and f2 are branched to the NFC receiver 32 and the wireless charging receiver 42 at the branch point 50. However, the signal branched to the NFC receiver 32 of the branched signal passes through a low pass filter (LPF), and the wireless charging operation frequency f2 is removed.

On the other hand, the capacitor used for the resonance frequency matching may be arranged in parallel between the two terminals of the loop antenna 116.

On the other hand, in order to remove the noise relative to the loop antenna 116 of the wireless charging receiver 42 may be further provided with a 1: 1 transformer at the input terminal of the wireless charging receiver 42.

In addition, the connection structure of the loop antenna 116 to the input terminals N1 and N2 of the NFC receiver 32 may minimize a wireless charging frequency signal corresponding to noise among the frequency signals input to the NFC receiver 32. For example, the terminal (for example, N1) of the input terminal (N1, N2) of the NFC receiver 32 may be configured to be connected in the middle of the coil (coil) of the loop antenna 116. In this case, the noise caused by the induced current generated in the coil by the magnetic field transmitted from the external device 10, 20 can be reduced, and the noise of the signal input to the NFC receiver 32 can be minimized.

8A-8B illustrate an exemplary layout of a loop antenna of a mobile terminal according to an embodiment of the present invention.

The loop antenna 116 of the mobile terminal 100 may be air-conditioned to resonate at or near the same frequency as the transmitting antenna 21. The loop antenna 116 may be configured to be similar in size to the transmit antenna 21. In addition, the loop antenna 116 may vary depending on the size of a predetermined charging device capable of receiving charging power through the battery 51.

8A to 8D, a plurality of different configurations may be applied using loop antennas using a single loop or multiple loops having various sizes. Therefore, the corresponding inductance value and resistance value may be different from each other according to the physical parameters of the coil constituting the loop, which also affects the coupling strength with the external device. The reception rate of the signal received through the antenna can be properly adjusted.

For example, the coils of the loop antenna may be circular loops having different diameters (FIGS. 8B and 8C).

The rectangular coil shown in FIG. 8A has an outer length (d _oi ) of 44.43 mm, an inner length (d _il ) of 28.75 mm, and an outer width (d _ow ) of 30.43. ㎜, Outer width (d _iw ) has a physical parameter corresponding to 14.75mm, thickness (d _c ) 14mm, the number of turns (N) 14, so the inductance L of the coil is 15.3uH , Resistance R may have a value of 32Ω.

The coil shown in FIG. 8B has an inner diameter d _i of 32.34 mm, an outer diameter d _o of 21.7 mm, a thickness d _c of 0.9 mm, and the number of turns N Has a physical parameter corresponding to 9, and thus the inductance L of the coil may have a value of 23.8uH and the resistance R of 32Ω.

The coil shown in FIG. 8C has an inner diameter d _i of 10.00 mm, an outer diameter d _o of 30.1 mm, a thickness d _c of 0.36 mm, and the number of turns N is a physical parameter corresponding to 30. In this case, the inductance L of the coil may have a value of 33.3 uH and the resistance R of 127 Ω.

On the other hand, in the case of a multi-turn antenna as shown in Figure 8d, by multi-turning the loop to strengthen the binding of the transmitting antenna and the resonance coupling, the transmission antenna and the wireless charging device for wireless charging It can provide high coupling to the liver.

9 is a flowchart of a control method of a mobile terminal according to another embodiment of the present invention.

5 and 9 together, the loop antenna 116 of the mobile terminal 100 may receive a signal having a predetermined frequency from at least one of an external NFC transceiver and a wireless charging device (S110).

The mobile terminal 100 may receive an NFC operating frequency (eg, 13.5Mhz band) signal from the NFC transceiver. In addition, the mobile terminal 100 may receive a wireless charging frequency (eg, 100Khz band) signal from an external wireless charging device.

Transmitting and receiving terminal of the loop antenna 116 is connected to one end of the switch (SW), the other end of the switch (SW) under the control of the controller 180, NFC receiver 31 or wireless charging receiver 41 It can be connected with.

The controller 180 may control a transmission path of a signal input to the loop antenna 116 by controlling the switching operation of the switch SW. To this end, the controller 180 may monitor the frequency f of the input signal input to the loop antenna 116 (S120).

As a result of the monitoring, if the frequency f of the input signal is the NFC operating frequency f1 (eg, 13.5 MHz band), the switch SW is controlled to connect the loop antenna 116 to the NFC receiver 31 ( S140).

As a result of the monitoring, the frequency f of the input signal controls the wireless charging frequency f2 (eg, 100 Khz band) and the switch SW to connect the loop antenna 116 to the wireless charging receiver 41 (S150). ).

Meanwhile, before a predetermined input signal is input through the loop antenna 116, the switch SW is connected to either the NFC receiver 31 or the wireless charging receiver 41, or the switch SW. The NFC receiver 31 and the wireless charging receiver 41 may not be connected to either.

In addition, the switch SW may be basically connected to the NFC receiver 31. In this case, when detecting a signal of a 100 kHz band among the signals input to the loop antenna 116, the controller 180 may switch the switch SW from the NFC receiver 31 to the wireless charging receiver 41.

On the other hand, the controller 180 controls the switching operation of the switch SW according to the signal input to the loop antenna 116, if there is no signal input to the loop antenna 116 for a predetermined time (S160) In step S170, the switch SW may be returned to its original position.

As described above, when using the antenna configuration of the mobile terminal according to an exemplary embodiment of the present invention, the antenna required for performing NFC communication and the antenna necessary for performing wireless charging are used as one common antenna. Thus, the mounting space of the mobile terminal can be reduced. In addition, there is a cost reduction effect due to the reduction of parts.

The above-described method of controlling a mobile terminal according to the present invention can be provided by being recorded in a computer-readable recording medium as a program for execution in a computer.

The control method of the mobile terminal according to the present invention can be executed through software. When implemented in software, the constituent means of the present invention are code segments that perform the necessary work. The program or code segments may be stored on a processor readable medium or transmitted by a computer data signal coupled with a carrier on a transmission medium or network.

A computer-readable recording medium includes all kinds of recording apparatuses in which data that can be read by a computer system is stored. Examples of the computer-readable recording device include ROM, RAM, CD-ROM, DVD ± ROM, DVD-RAM, magnetic tape, floppy disk, hard disk, optical data storage device, and the like. The computer-readable recording medium may also be distributed to networked computer devices so that computer readable code can be stored and executed in a distributed manner.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the invention. The present invention is not limited to the drawings. In addition, the embodiments described in this document can be applied to not only the present invention, but also all or some of the embodiments may be selectively combined so that various modifications can be made.

10: first external device 20: second external device
31,32: NFC receiver 41,42: wireless charging receiver
100: mobile terminal 116: loop antenna
180:

Claims (12)

A loop antenna for receiving an input signal of any one of a Near Field Communication (NFC) operating frequency signal and a wireless charging frequency signal;
An NFC receiver configured to process the NFC operating frequency signal input from the loop antenna;
A wireless charging receiver configured to process the wireless charging frequency signal input from the loop antenna; And
A switch connected to a transmission / reception terminal of the loop antenna to switch a transmission path of the input signal received by the loop antenna to either the NFC receiver or the wireless charging receiver;
Mobile terminal comprising a. The method of claim 1,
And a controller configured to control a switching operation of the switch by monitoring a frequency of a signal input to the loop antenna.
The controller may be configured to switch the transmission path to the NFC receiver when the frequency of the input signal is the NFC operating frequency, and to switch the transmission path to the wireless charge receiver when the frequency of the input signal is the wireless charging operation frequency. Mobile terminal characterized in that. The method of claim 1,
The loop antenna is connected to an input terminal of the NFC receiver by making a series resonance with a capacitor.
The capacitance value of the capacitor is a mobile terminal having a value for resonating at a specific frequency with the inductance of the loop antenna. The method of claim 1,
And the loop antenna is a multi turn antenna. The method of claim 1,
The loop antenna is a mobile terminal, characterized in that formed of a ferrite core. A loop antenna for receiving an input signal including a Near Field Communication (NFC) operating frequency signal and a wireless charging frequency signal;
An NFC receiver connected to a transceiver of the loop antenna to receive an NFC operating frequency signal among the input signals; And
A wireless charging receiver connected to a transmitting and receiving end of the loop antenna to receive a wireless power signal from the loop antenna and to supply charging power to a coupled battery or an electronic device;
Mobile terminal comprising a. The method of claim 1,
The loop antenna is connected to an input terminal of the NFC receiver by making a series resonance with a capacitor.
The capacitance value of the capacitor is a mobile terminal having a value for resonating at a specific frequency with the inductance of the loop antenna. The method of claim 7, wherein
Further comprising a low pass filter between the capacitor and the input terminal of the NFC receiver,
The low pass filter removes the wireless charging frequency signal from the input signal and transfers only an NFC operating frequency signal to the NFC receiver. The method according to claim 6,
And the loop antenna is a multi turn antenna. The method according to claim 6,
The loop antenna is a mobile terminal, characterized in that formed of a ferrite core. Receiving an input signal of either a Near Field Communication (NFC) operating frequency signal or a wireless charging frequency signal through a loop antenna;
Monitoring the frequency of the input signal; And
Switching a transmission path of the input signal to either an NFC receiver or a wireless charging receiver by controlling a switch electrically connected to a transmission / reception terminal of the loop antenna according to the monitoring result;
Control method of a mobile terminal comprising a. The method of claim 11,
Wherein the switching comprises:
The transmission path is switched to the NFC receiver when the frequency of the input signal is the NFC operating frequency, and the transmission path is switched to the wireless charging receiver when the frequency of the input signal is the wireless charging operation frequency. Control method of the terminal.

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