KR101915988B1 - Mobile terminal and method for controlling the same - Google Patents

Abstract

The present invention relates to a mobile terminal and a control method thereof, in which usage of a terminal can be realized by further considering convenience of a user. According to at least one of the embodiments of the present invention, there is an advantage that communication with the specific tag is interrupted when communicating with the specific tag for a predetermined time or longer, thereby suppressing unnecessary waste of electric power.

Description

[0001] MOBILE TERMINAL AND METHOD FOR CONTROLLING THE SAME [0002]

The present invention relates to a mobile terminal and a control method thereof, in which usage of a terminal can be realized by further considering convenience of a user.

The terminal can move And can be divided into a mobile / portable terminal and a stationary terminal depending on whether the mobile terminal is a mobile terminal or a mobile terminal. The mobile terminal can be divided into a handheld terminal and a vehicle mount terminal according to whether the user can directly carry the mobile terminal.

Such a terminal has various functions, for example, in the form of a multimedia device having multiple functions such as photographing and photographing of a moving picture, reproduction of a music or video file, reception of a game and broadcasting, etc. .

In order to support and enhance the functionality of such terminals, it may be considered to improve the structural and / or software parts of the terminal.

Since the NFC (Near Field Communication) function is installed in the mobile terminal, various functions can be supported. However, in the case of a terminal supporting the existing NFC function, even if the long-time contact with the external NFC tag is long, the communication with the external NFC tag is maintained even when the necessary communication is completed or not necessary, There is a drawback that it is severe. Therefore, there is a need for a solution to this problem.

It is an object of the present invention to provide a mobile terminal and a control method thereof for canceling communication with a card after a predetermined time even if the mobile terminal and the card are in contact for a long time .

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory and are not restrictive of the invention, unless further departing from the spirit and scope of the invention as defined by the appended claims. It will be possible.

In order to achieve the above object, there is provided a mobile terminal supporting near field communication according to an embodiment of the present invention, comprising: a short range communication module for detecting and communicating a tag; and a short distance communication module, And control to stop communication with the tag.

In accordance with another aspect of the present invention, there is provided a method of controlling a mobile terminal supporting near field communication, the method comprising: sensing at least one tag; communicating with a first tag; And stopping the communication with the first tag when the communication is performed for a predetermined time or longer.

Effects of the mobile terminal and the control method according to the present invention will be described as follows. According to at least one embodiment of the present invention, unnecessary consumption of electric power can be prevented when the mobile terminal and the external NFC tag are in contact for a long time.

The effects obtained by the present invention are not limited to the above-mentioned effects, and other effects not mentioned can be clearly understood by those skilled in the art from the following description will be.

1 is a block diagram of a mobile terminal according to an embodiment of the present invention.
2A is a front perspective view of a mobile terminal according to an embodiment of the present invention.
2B is a rear perspective view of a mobile terminal according to an embodiment of the present invention.
3 is a diagram for explaining a service associated with NFC (Near Field Communication) applied to the present invention.
FIG. 4 is a diagram illustrating a general method of detecting and communicating a tag using an NFC function.
5 is a flowchart illustrating a method of controlling a mobile terminal according to an embodiment of the present invention.
FIG. 6 is a diagram showing that tag identification information is registered in a list according to an embodiment of the present invention, and communication with a tag registered in the list is stopped.
7 is a diagram illustrating a case where the mobile terminal detects another tag in a state in which the mobile terminal stops communication with respect to the specific tag.
8 is a diagram showing a case where a specific tag is dropped and then brought close again in a state where communication with a specific tag is interrupted.

Hereinafter, a mobile terminal related 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 described in this specification may include a mobile phone, a smart phone, a laptop computer, a digital broadcasting terminal, a PDA (Personal Digital Assistants), a PMP (Portable Multimedia Player), navigation and the like. However, it will be understood by those skilled in the art that the configuration according to the embodiments described herein may be applied to a fixed terminal such as a digital TV, a desktop computer, and the like, unless the configuration is applicable only to a mobile terminal.

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

The mobile terminal 100 includes a wireless communication unit 110, an audio / video input unit 120, a user input unit 130, a sensing unit 140, an output unit 150, a memory 160, A controller 170, a controller 180, a power supply 190, and the like. The components shown in FIG. 1 are not essential, and a mobile terminal having more 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 broadcast signals 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. Two or more broadcast receiving modules 111 may be provided to the mobile terminal 100 for simultaneous broadcast reception or broadcast channel switching of at least two broadcast channels.

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 means information related to a broadcast channel, a broadcast program, or 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, an EPG (Electronic Program Guide) of DMB (Digital Multimedia Broadcasting) or an ESG (Electronic Service Guide) of Digital Video Broadcast-Handheld (DVB-H).

For example, the broadcast receiving module 111 may be a Digital Multimedia Broadcasting-Terrestrial (DMB-T), a Digital Multimedia Broadcasting-Satellite (DMB-S), a Media Forward Link Only (Mobile Broadcasting Business Management System), ISDB-T (Integrated Services Digital Broadcasting (ISDB-T)), Digital Multimedia Broadcasting (MBMS) Digital Broadcast-Terrestrial) or the like. Of course, the broadcast receiving module 111 may be adapted to other broadcasting systems 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 160.

The mobile communication module 112 may be coupled to a base station, an external terminal, or a server on a mobile communication network, such as, but not limited to, Gobal System for Mobile communications (GSM), Code Division Multiple Access (CDMA), Wideband CDMA Transmits and receives wireless signals with one. 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 is a module for wireless Internet access, and may be built in or externally attached to the mobile terminal 100. Wireless Internet technologies include WLAN (Wi-Fi), Wibro (Wireless broadband), Wimax (World Interoperability for Microwave Access), HSDPA (High Speed Downlink Packet Access), GSM, CDMA, WCDMA, LTE Evolution (but not limited to) may be used.

The wireless Internet module 113, which performs wireless Internet access through the mobile communication network, is connected to the mobile communication module 110 through the mobile communication network, for example, from the viewpoint that the wireless Internet access by Wibro, HSDPA, GSM, CDMA, WCDMA, LTE, (112). ≪ / RTI >

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, and the like can be used as a short range communication technology.

The position information module 115 is a module for obtaining the position of the mobile terminal, and a representative example thereof is a Global Position System (GPS) module. According to the current technology, the position information module 115 calculates distance information and accurate time information from three or more satellites, and then applies a trigonometric method to the calculated information to obtain three-dimensional (3D) information according to latitude, longitude, The current position information can be accurately calculated. At present, a method of calculating position and time information using three satellites and correcting an error of the calculated position and time information using another satellite is widely used. In addition, the GPS module 115 can calculate speed information by continuously calculating the current position in real time.

Referring to FIG. 1, 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 an image frame such as a still image or moving image obtained by the image sensor in the video communication 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 160 or transmitted to the outside through the wireless communication unit 110. [ Two or more cameras 121 may be provided depending on the use environment.

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, a dome switch, a touch pad (static / static), a jog wheel, a jog switch, and the like.

The sensing unit 140 senses the current state 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 or absence of user contact, the orientation of the mobile terminal, 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 is possible to sense whether the slide phone is opened or closed. It is also possible to sense whether the power supply unit 190 is powered on, whether the interface unit 170 is connected to an external device, and the like. Meanwhile, the sensing unit 140 may include a proximity sensor 141.

The output unit 150 is for generating output related to visual, auditory or tactile sense and includes a display unit 151, an acoustic output unit 152, an alarm unit 153, and a haptic module 154 .

The display unit 151 displays (outputs) information processed by the mobile terminal 100. For example, when the mobile terminal is in the call mode, a UI (User Interface) or a GUI (Graphic User Interface) associated with a call is displayed. 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 (LCD), a thin film transistor-liquid crystal display (TFT LCD), an organic light-emitting diode (OLED), a flexible display display, and a 3D display.

Some of these displays may be transparent or light transmissive so that they can be seen through. This can be referred to as a transparent display, and a typical example of the transparent display is TOLED (Transparent OLED) and 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.

There may be two or more display units 151 according to the embodiment of the mobile terminal 100. 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 each other, or may be disposed on different surfaces.

(Hereinafter, referred to as a 'touch screen') in which a display unit 151 and a sensor for sensing a touch operation (hereinafter, referred to as 'touch sensor') form 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 (not shown). The touch controller processes the signal (s) and transmits the corresponding data to the controller 180. Thus, the control unit 180 can know which area of the display unit 151 is touched or the like.

The proximity sensor 141 may be disposed in an inner region of the mobile terminal or in the vicinity of the touch screen, which is enclosed by the touch screen. The proximity sensor refers to a sensor that detects the presence or absence of an object approaching a predetermined detection surface or a nearby object without mechanical contact using the force of an electromagnetic field or infrared rays. 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 type photoelectric sensor, a direct reflection type photoelectric sensor, a mirror reflection type photoelectric sensor, a high frequency oscillation type 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 recognizing that the pointer is positioned on the touch screen while the pointer is not in contact with the touch screen is referred to as "proximity touch" The act of actually contacting the pointer on the touch screen may be referred to as "contact touch. &Quot; The location where the pointer is proximately touched on the touch screen may refer to a position where the pointer corresponds vertically 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 detected proximity touch operation and the proximity touch pattern may be output on the touch screen.

The audio output unit 152 may output audio data received from the wireless communication unit 110 or stored in the memory 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 unit 152 also outputs sound signals related to functions (e.g., call signal reception sound, message reception sound, and the like) performed by the mobile terminal 100. [ The audio output unit 152 may include a receiver, a speaker, a buzzer, and the like.

The alarm unit 153 outputs a signal for notifying the occurrence of an event of the mobile terminal 100. Examples of events that occur in the mobile terminal 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 display unit 151 and the sound output unit 152 may be a type of the alarm unit 153. The display unit 151 and the sound output unit 152 may be connected to 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 the vibration generated by the haptic module 154 are controllable. For example, different vibrations may be synthesized and output or sequentially output.

In addition to the vibration, the haptic module 154 may include a pin arrangement vertically moving with respect to the contact skin surface, a spraying force or a suction force of the air through the injection port or the suction port, a touch on the skin surface, contact with an electrode, And various tactile effects such as an effect of reproducing a cold sensation using an endothermic or exothermic element can be generated.

The haptic module 154 can be implemented not only to transmit the tactile effect through the direct contact but also to allow the user to feel the tactile effect through the muscular sensation of the finger or arm. At least two haptic modules 154 may be provided according to the configuration of the mobile terminal 100.

The memory 160 may store a program for processing and controlling the control unit 180 and temporarily store the input / output data (e.g., telephone directory, message, audio, still image, For example. The memory 160 may store the frequency of use of each of the data (for example, each telephone number, each message, and frequency of use for each multimedia).

In addition, the memory 160 may store data on vibration and sound of various patterns outputted when a touch is input on the touch screen.

The memory 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), a RAM (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 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 supplies power to each component in the mobile terminal 100 or transmits data to the 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. Therefore, the identification device can be connected to the mobile terminal 100 through the port.

When the mobile terminal 100 is connected to an external cradle, the interface unit may be a path through which power from the cradle is supplied to the mobile terminal 100, or various command signals input by the user to the cradle may be transmitted It can be a passage to be transmitted to the terminal. The various command signals or the power source input from the cradle may be operated as a signal for recognizing that the mobile terminal is correctly mounted on the cradle.

The controller 180 typically controls the overall operation of the mobile terminal. 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 external power and internal power under the control of the controller 180 and supplies power necessary for operation of the respective components.

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 a processor, controllers, micro-controllers, microprocessors, and other electronic units for performing other functions. In some cases, The embodiments described may be implemented by the control unit 180 itself.

According to a software implementation, embodiments such as the procedures and functions described herein may be implemented with separate software modules. Each of the software modules may perform one or more of the functions and operations described herein. Software code can be implemented in a software application written in a suitable programming language. The software code is stored in the memory 160 and can be executed by the control unit 180. [

2A 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 includes 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 injection molding a synthetic resin, or may be formed to have a metal material such as stainless steel (STS) or titanium (Ti) or the like.

A display unit 151, an audio output unit 152, a camera 121, user input units 130/131 and 132, a microphone 122, an interface unit 170, and the like are disposed in the front body 101 .

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 and the interface unit 170 may be 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 mobile terminal 100 and may include a plurality of operation units 131 and 132. The operation units 131 and 132 may be collectively referred to as a manipulating portion.

The contents inputted by the first or second operation unit 131 or 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 The touch recognition mode can be activated or deactivated.

2B is a rear perspective view of the mobile terminal shown in FIG. 2A.

Referring to FIG. 2B, 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 that of the camera 121 (see FIG. 2A), and may be a camera having the same or different pixels as 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 so as to be rotatable or pop-upable.

A flash 123 and a mirror 124 may be additionally 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. 2A), and may be used for the implementation of the speakerphone mode during a call.

In addition to the antenna for communication, a broadcast signal receiving antenna 116 may be additionally disposed on the side of the terminal body. The antenna 116, which forms part of the broadcast receiving module 111 (see FIG. 1), can be installed to be able to be drawn out from the terminal body.

A power supply unit 190 for supplying power to the mobile terminal 100 is mounted on the terminal body. The power supply unit 190 may be built in the terminal body or may be 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 be of a light transmission type for the display unit 151. [ In this case, if the display unit 151 is configured to output the time information on both sides (i.e., in the directions of both the front and back sides of the mobile terminal), the time information can be recognized through the touch pad 135 do. The information output on both sides may be all controlled by the touch pad 135. [

Meanwhile, the display for exclusive use of the touch pad 135 may be separately installed, so that the touch screen may be disposed in the rear case 102 as well.

The touch pad 135 operates in correlation with the display portion 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.

Hereinafter, embodiments related to a control method that can be implemented in the mobile terminal configured as above will be described with reference to the accompanying drawings.

Near Field Communication (NFC) is a type of RFID that uses a non-contact, near-field wireless communication module that uses a specific frequency band (for example, 13.56 Mz) to transmit data between terminals at close distances. It says.

Near Field Communication (NFC) can be widely used not only for payment but also for supermarkets and general shops, for goods information and for travel information for visitors, traffic, access control locks.

The NFC technique may be applied to the mobile terminal 100 as well.

When NFC technology is applied, a terminal having a tag embedded in an existing RFID concept is operated in an active mode, whereby not only a function as a tag but also a reader for reading a tag, a reader for inputting information in a tag, (WRITER) function, and P2P can be performed between the terminal and the terminal.

ISO 18092, the international standard for NFC, is also compatible with ISO 14443, the international standard for non-contact smart cards, with Sony's Felica, and Philips' MiFare.

For example, NFC tags can be classified into four types as shown in Table 1 below.

[Table 1]

However, it is apparent that the NFC tag type shown in Table 1 is merely an example and can be implemented in other types.

In addition, the NFC may be classified into three operation modes as shown in Table 2 below. It should be noted, however, that Table 2 below is merely an example of the present invention, and NFC can be used in other modes of operation.

[Table 2]

In addition, typical application services of NFC applied to the mobile terminal 100 can be classified as shown in FIG. However, it is apparent that the concrete application service described in FIG. 3 is merely an example to which the present invention can be applied, and can be provided as other types of services.

First, the mobile terminal can be used for contact application services.

This includes, for example, settlement services for paying money, account transfer services through online account linkage, business card information exchange services such as contacts and e-mails, and wireless communication access services such as pairing for data exchange between terminals.

Next, it can be used for a personal information management application service.

This includes, for example, access control services including door opening and closing through authentication, personal authentication services such as electronic product user authentication, and remote control for buildings, vehicles, and the like.

It can also be used for information provision and customized ad related application services.

For example, information such as a museum, guidance services such as providing tourist information (voice / text) and location guidance, medical services such as medical record management, runner services such as parking location confirmation, performance ticket through poster contact, Downloading content such as product information service such as reservation service, advertisement and coupon service such as location-based advertisement and coupon service, product information browsing, genuine article determination, history tracking, manual providing and A / S information providing, e-book, The same content purchase service, and a social network service for directly transmitting the information read from the tag to the social network.

FIG. 4 is a diagram illustrating a general method of detecting and communicating a tag using an NFC function. 4A is a diagram showing that the mobile terminal 100 can not detect when the distance between the mobile terminal 100 and the tag 501 is a certain distance or more. That is, the short-range communication module 114 is a module that can communicate only within a predetermined distance, and the predetermined distance may vary according to the communication method. Referring to FIG. 4, the recognition boundary 503 is a limit to which the local communication module 114 can communicate. Accordingly, when the tag 501 enters the recognition boundary 503, the local communication module 114 can sense and communicate. When the tag 501 exists outside the recognition boundary 503, the local communication module 114 Can not detect and communicate.

Referring to FIG. 4 (b), the tag 501 is located within a predetermined distance from the mobile terminal 100. When the tag 501 is positioned within the recognition boundary 503 of the mobile terminal 100, the mobile terminal 100 can detect the tag 501 using the short distance communication module 114 as in step 401 have. 4C is a diagram illustrating the state after the mobile terminal 100 detects the tag 501 using the short-range communication module 114. As shown in FIG. Referring to FIG. 4C, the mobile terminal 100 may communicate with the detected tag 501 using the short-range communication module 114, as shown in step 402.

In this way, the mobile terminal communicates with the detected tag 501. However, if the tags are still in close proximity, the communication is maintained even if the necessary communication has already been completed or is not needed. Therefore, unnecessary power is wasted in maintaining communication continuously.

Therefore, in the present invention, when communication is maintained for a predetermined time or longer in order to prevent such power waste, communication with the tag is interrupted.

5 is a flowchart illustrating a method of controlling a mobile terminal according to an embodiment of the present invention. Referring to FIG. 5, in step S5001, the controller 180 detects the tag using the short-range communication module 114. FIG. In this case, the tag that can be detected by the short-range communication module 114 may be a tag existing within the recognition boundary 503. The controller 180 determines the identification information of the detected tag 501 and determines whether the identification information exists in the list (S5002). In this case, the list is a list for filtering tags existing in the list If there is a tag registered in this list, communication with the tag is interrupted. Therefore, the list may include at least one of the identification information of the tag, the communication start time, or the communication holding time.

If the identification information of the detected tag is present in the list, the communication with the tag is interrupted. (S5003) If the identification information of the detected tag does not exist in the list, the control unit 180 transmits the tag registered in the list (S5004), and exchanges information with the detected tag (S5005). In this case, the meaning of exchanging information means that the mobile terminal exchanges the information necessary for utilizing the NFC function with the NFC tag. For example, when a payment is attempted using the NFC function, it may mean exchanging approval information between the mobile terminal and the NFC tag.

In step S5009, the controller 180 calculates the time for exchanging information with the tag. When the time for exchanging information is less than a predetermined time, the controller 180 maintains communication for exchanging information. When the time for exchanging information is longer than a predetermined time, After registering the tag (S5006), the communication is interrupted (S5003).

In step S5007, the control unit 180 determines whether the short-range communication module 114 releases tag detection. Detection of the tag is released when the detected tag 501 is out of the recognition limit 503 of the local communication module 114.

In the present invention, it is necessary to stop the communication for a long-time tag for unnecessary power consumption. However, if the tag that has stopped communicating comes close after a long distance, it is necessary to communicate again with the tag. Accordingly, in step S5007, the controller 180 determines whether there is a tag whose detection is released. If such a tag exists, the controller 180 initializes the list in step S5008. If the controller 180 determines in step S5007 that there is no tag that has been detected, the controller 180 maintains communication with the tag that has been continuously detected in the interrupted state.

FIG. 6 is a diagram showing that tag identification information is registered in a list according to an embodiment of the present invention, and communication with a tag registered in the list is stopped. 6A, the mobile terminal 100 detects a plurality of tags 501-1 and 501-2 using the short-distance communication module 114 and transmits the detected tags 501-1 and 501- 2). On the other hand, the control unit 180 controls the short-range communication module 114 to communicate with the second tag 501-2, and can stop the communication with the second tag 501-2 in the communication for a predetermined time or more . For example, when the mobile terminal 100 maintains communication with the second tag 501-2 for 7 seconds or more, the communication with the second tag 501-2 can be stopped.

More specifically, as shown in FIG. 6B, when the mobile terminal 100 communicates with the second tag 501-2 for a predetermined time or longer, the mobile terminal 100 transmits identification information of the second tag 501-2 to the list (502). The control unit 180 may include at least one of the identification information of the tag, the communication start time, and the communication hold time in the list. The mobile terminal 100 may exclude the tag registered in the list 502 from the communication object. The communication with the second tag 501-2 is interrupted as shown in Fig. 6 (c). On the other hand, it is obvious that the communication with the first tag 501-1 is continued and that the communication time with the first tag 501-1 is also registered in the list 502 when the communication time is more than the predetermined value.

As described above, the reason for stopping the communication for the tag whose communication is maintained for a predetermined time or longer is to reduce power consumption. The mobile terminal 100 can be always carried by a user who uses the mobile terminal 100 because of its portability. In this case, it may be considered that the user is in continuous contact with at least one tag possessed by the user. For example, a payment tag and a mobile terminal existing in a credit card may coexist in a user's pocket. In this case, since the settlement tag is still close to the mobile terminal, according to the existing technology, the mobile terminal can continue to communicate with the external NFC tag. If the communication is continuously performed, the power of the mobile terminal may consume more power than when no communication is performed, thereby wasting power. In particular, because of the portability of mobile terminals, power management can be one of the major concerns. Therefore, in the embodiment of the present invention, the control unit 180 controls the short-range communication module 114 to stop the communication with the specific tag when the mobile terminal is close to the specific tag for a predetermined time or longer.

7 is a diagram illustrating a case where the mobile terminal detects another tag in a state in which the mobile terminal stops communication with respect to the specific tag. Referring to FIG. 7A, the mobile terminal 100 is in a state of stopping communication with the second tag 501-2. In this case, the mobile terminal 100, as shown in FIG. 6B, The identification information of the second tag can be registered in the list 502. [ As shown in FIG. 7 (b), when the third tag 501-3 is close to the mobile terminal 100, the mobile terminal 100 can sense the third tag 501-3 adjacent thereto. That is, when the third tag 501-3 enters the recognition boundary 503, the mobile terminal 100 can sense the adjacent third tag 501-3. The mobile terminal 100 can extract the identification information of the third tag 501-3 and compare it with the identification information registered in the list 502. [ When the identification information of the third tag 501-3 is identical to the identification information registered in the list 502, communication with the third tag 501-3 is not performed. This is because the identification information of the third tag 501-3 is the same as the value registered in the list 502 because it is the same tag as the second tag 501-2 which is currently stopping communication. Therefore, the mobile terminal 100 does not perform communication with the detected third tag 501-3.

On the other hand, when the identification information of the third tag 501-3 is different from the value registered in the list 502, as shown in FIG. 7C, the mobile terminal 100 transmits the third tag 501- 3). In this case, the second tag 501-2, which is already stopped by the control unit 180, and the newly detected third tag 501-3 are different tags.

Furthermore, the mobile terminal 100 resumes communication with the second tag 501-2 which has stopped the communication. That is, the fact that the user has approached the third tag 501-3 to the mobile terminal 100 is intended to use the short range communication module 114 of the mobile terminal 100, 2 tag 501-2. More specifically, the identification information registered in the list 502 is initialized in the state of FIG. 7 (a). That is, all of the identification information registered in the list 502 is deleted.

8 is a diagram showing a case where a specific tag is dropped and then brought close again in a state where communication with a specific tag is interrupted. Referring to FIG. 8 (a), the mobile terminal 100 is in a state of stopping communication with the first tag 501-1. That is, the first tag 501-1 of FIG. 8A may be in a state in which communication with the mobile terminal 100 has been interrupted for a predetermined time or longer. In this case, the identification information of the first tag 501-1 may be registered in the list 502. [

8 (b) is a diagram showing a state where the mobile terminal 100 and the first tag 501-1 are far apart. The far-away state means that the first tag 501-1 is moved to exist outside the recognition boundary 503. The identification information of the first tag 501-1 is registered in the list 502 as shown in Fig. 8 (a), and the first tag 501-1 is registered with the identification boundary 503), the control unit 180 can initialize the list 502. In this case, That is, when the mobile terminal 100 can not detect any tag 501, the identification information registered in the list 502 can be deleted.

This is because, when the tag whose communication has been interrupted is contacted again after it has left the mobile terminal 100, it can be regarded that the user has requested the use of the tag again. As in the above example, there may be cases where the external NFC tag and the mobile terminal are stacked together in the pockets, and then the pockets are taken out of the pockets to perform settlement. In this case, the use of the approval tag can be requested by a method in which the approval tag is slightly detached from the mobile terminal and then brought back into proximity again.

8C, when the first tag 501-1 is located within the recognition boundary 503 of the mobile terminal 100, the mobile terminal 100 transmits the first tag 501-1, And can perform communication. This is because the control unit 180 has deleted the identification information of the first tag 501-1 from the list 502. [

It will be apparent to those skilled in the art that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof.

The present invention described above can be embodied as computer-readable codes on a medium on which a program is recorded. The computer readable medium includes all kinds of recording devices in which data that can be read by a computer system is stored. Examples of the computer-readable medium include ROM, RAM, CD-ROM, magnetic tape, floppy disk, optical data storage, and the like, and also implemented in the form of a carrier wave (for example, transmission over the Internet) . Also, the computer may include a control unit 180 of the terminal.

Accordingly, the above description should not be construed in a limiting sense in all respects and should be considered illustrative. The scope of the present invention should be determined by rational interpretation of the appended claims, and all changes within the scope of equivalents of the present invention are included in the scope of the present invention.

100: mobile terminal 110: wireless communication unit
120: A / V input / output unit 130: user input unit
140: sensing unit 150: output unit
160: memory 170: interface section
180: control unit 190: power supply unit

Claims (14)

An NFC module for detecting at least one near field communication (NFC) tag to perform communication; And
If the first NFC tag is detected through the NFC module for a predetermined time or longer, the identification information of the first NFC tag is registered in the list, the connection with the first NFC tag is released, and the second NFC tag is transmitted through the NFC module If it is determined that there is the same identification information as the identification information of the second NFC tag in the list, disconnects the connection with the second NFC tag if it is determined as a result of the determination, And a controller for maintaining a connection with the tag. The method according to claim 1,
Wherein the control unit initializes the identification information registered in the list when the first and second NFC tags are not detected. The method according to claim 1,
Wherein the control unit resumes communication with the first NFC tag when the first NFC tag is detected again and controls to resume the resumed communication if the resumed communication lasts for a predetermined time or longer. A method of controlling a mobile terminal that performs communication by sensing at least one Near Field Communication (NFC) tag,
Detecting a first NFC tag;
Registering the identification information of the first NFC tag in the list when the first NFC tag is detected for a predetermined time or longer;
Releasing the connection with the first NFC tag;
Detecting a second NFC tag;
Determining whether there is the same identification information as the identification information of the second NFC tag in the list;
Releasing the connection with the second NFC tag if the determination result is present;
Maintaining a connection with a second NFC tag if the determination result is not present; And
And if the first and second NFC tags are not detected, initializing the identification information registered in the list. delete delete delete delete delete delete delete delete delete delete

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