KR20150009002A - Mobile terminal - Google Patents

Abstract

A mobile terminal according to the present invention includes a case which includes a conductive metal part, a main board which is mounted in the case and includes a ground surface and a feeding terminal, a first antenna radiator which is separated from the ground surface and the metal part, a feeding line which electrically connects the feeding terminal to the first antenna radiator, and a ground line which electrically connects the first antenna radiator to the ground surface and the metal part. The mobile terminal prevents the degradation of the performance of an antenna by minimizing the formation of an electromagnetic field between the main board and the case made of metal even though a metal material is used in the case.

Description

[0001] MOBILE TERMINAL [0002]

The present invention relates to a mobile terminal to which a metal case can be applied without lowering the reception ratio of the antenna.

The terminal can move And may 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. .

Generally, the case at the back of the mobile terminal is made of a dielectric material. However, recently, a mobile terminal equipped with a case made of a metal material has been attempted due to a cosmetic requirement.

Thus, when the battery cover is made of metal, the radiation of the signal from the antenna is disturbed by the metal battery cover, so that an antenna capable of emitting a proper signal when the metal battery cover is used is needed.

An object of the present invention is to provide a mobile terminal which can prevent a transmission / reception ratio of an antenna from being lowered even if a metal case is used.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, A main board mounted inside the case and having a feed end and a ground plane; A first antenna radiator disposed apart from the metal portion and the ground plane; A feed line electrically connecting the feed end and the first antenna radiator; And a ground line electrically connecting the ground plane and the metal portion to the first antenna radiator.

Wherein the case is mounted on the main board; And a rear cover detachably attached to a rear surface of the main body case and having the metal portion.

The ground line may be connected to the first antenna radiator at one side and a flexible circuit board having a pattern at the other side connected to the metal part and the feeding end.

One side of the flexible circuit board may be located on the outer surface of the main body case, and may further include a screw connected to the first antenna radiator through the flexible circuit board and the main body case.

And a connection terminal connected to the pattern on the other side of the flexible circuit board and elastically deformed when the rear cover is coupled with the main body case and connected to the metal part.

The feeding end may further include a C-clip connected to the other side of the flexible circuit board.

The first antenna radiator may be exposed outside the case to form a part of the case.

The ground line and the feed line may be connected to the first antenna radiator by being offset from the center of the first antenna radiator.

Wherein the first antenna radiator receives a signal of a first frequency and a second frequency and detects a ratio of a distance from one end of the first radiator to a second end of the first radiator at a position where the ground line and the feeder line are coupled, May correspond to the first frequency and the second frequency ratio.

Wherein the first antenna radiator further comprises a second antenna radiator located at a first side of the four sides of the mobile terminal and located at a side of a second side not adjacent to the first side, The feeding and grounding may be biased in one direction such as the ground line and the feeding line.

The ground line and the feed line may have bent portions, and the first antenna radiator may have a straight bar shape.

The first antenna radiator may be located at the upper or lower end of the mobile terminal. At this time, the first antenna radiator may have a U-shape extending from the upper end of the mobile terminal to the left and right.

The distance between the end portion of the first antenna radiator and the metal portion may be separated by 1 mm or more.

And an antenna radiation pattern disposed between the metal part and the first antenna radiator and electrically connected to the feed part and the metal part and formed on the surface of the case.

And a middle frame disposed within the case and having the main circuit board and the electronic part mounted thereon and including a metal plate and an extrudate, wherein the first antenna radiator is spaced apart from the metal plate at an end of the middle frame, Can be combined.

The metal part may be electrically connected to the metal plate.

According to at least one embodiment of the present invention, even if a metal material is used as a case, the formation of an electromagnetic field between the case of the metal material and the main board can be minimized, and the performance of the antenna can be prevented from deteriorating.

Further, the distance between the first antenna radiator and the metal part of the case can be reduced, and the degree of freedom in designing can be increased when the metal material is used in the case.

In addition, even if the metal case is a detachable battery cover, the performance can be maintained even if the metal material is detached.

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.
2 is a front perspective view of a mobile terminal according to an embodiment of the present invention.
3 is a rear perspective view of a mobile terminal according to an embodiment of the present invention.
4 is a perspective view illustrating a back cover of a mobile terminal according to an embodiment of the present invention.
5 is a conceptual diagram illustrating an antenna positioned at one end of a mobile terminal according to an embodiment of the present invention.
6 is a cross-sectional view illustrating a grounding relationship between a first antenna radiator of a mobile terminal and a metal portion of a case according to an embodiment of the present invention.
7 is a cross-sectional view of the exploded view of Fig.
8 is a cross-sectional view of a portion where a feed line connecting a first antenna radiator of a mobile terminal and a feed terminal of a main board according to an embodiment of the present invention is located.
9 is a conceptual diagram illustrating a feeding and grounding relationship of a first antenna radiator of a mobile terminal according to an embodiment of the present invention.
10 is a conceptual view illustrating a feeding and grounding relationship of a first antenna radiator of a mobile terminal according to another embodiment of the present invention.
11 is a plan view of a middle frame of a mobile terminal according to an embodiment of the present invention.
12 is a conceptual diagram illustrating a feeding and grounding relationship of a first antenna radiator of a mobile terminal according to another embodiment of the present invention.
13 is a graph illustrating the first antenna radiator efficiency of the mobile terminal of the present invention.

While the invention is susceptible to various modifications and alternative forms, specific embodiments thereof are shown by way of example in the drawings and will herein be described in detail. It should be understood, however, that the invention is not intended to be limited to the particular embodiments, but includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention.

Terms including ordinals, such as first, second, etc., may be used to describe various elements, but the elements are not limited to these terms. The terms are used only for the purpose of distinguishing one component from another.

It is to be understood that when an element is referred to as being "connected" or "connected" to another element, it may be directly connected or connected to the other element, . On the other hand, when an element is referred to as being "directly connected" or "directly connected" to another element, it should be understood that there are no other elements in between.

The terminology used in this application is used only to describe a specific embodiment and is not intended to limit the invention. The singular expressions include plural expressions unless the context clearly dictates otherwise.

In the present application, the terms "comprises", "having", and the like are used to specify that a feature, a number, a step, an operation, an element, a component, But do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, or combinations thereof.

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.

Hereinafter, a mobile terminal according to an exemplary embodiment of the present invention will be described in detail with reference to the drawings. The same or corresponding components are denoted by the same reference numerals regardless of the reference numerals, and redundant explanations thereof are omitted.

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), and navigation.

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 may be provided to the mobile terminal 100 for simultaneous broadcast reception or broadcast channel switching for 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, Global Transmission for Mobile communications (GSM), Code Division Multiple Access (CDMA), Wideband CDMA And wireless signals. 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).

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 GPS module 115 calculates distance information and accurate time information from three or more satellites, and then applies trigonometry to the calculated information to obtain a three-dimensional string of latitude, longitude, The location 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 image frames such as still images or moving images 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 button 136 located on the front, rear, or side of the mobile terminal 100, and a touch sensor (static / static) 137. Although not shown, ), A dome switch, 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 proximity sensor will be described later).

The output unit 150 is for generating output related to the visual, auditory or tactile sense and includes a display unit 151, an audio output module 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 may be referred to as a transparent display, and a typical example of the transparent display is TOLED (transparent OLED) 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.

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.

In the case where the display unit 151 and the touch sensor 137 have a mutual layer structure or are integrally formed (hereinafter referred to as a 'touch screen'), the display unit 151 may be used as an input device . The touch sensor 137 may be stacked on the display unit 151 to form a layer structure when the touch sensor 137 has a form of a touch film, a touch sheet, a touch pad, or the like. And may be integrally formed.

The touch sensor 137 may be configured to convert a change in a pressure applied to a specific part of the display part 151 or a capacitance generated in a specific part of the display part 151 into an electrical input signal. The touch sensor 137 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 137, 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 module 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 module 152 also outputs sound signals related to functions (e.g., call signal reception sound, 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.

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. In this case, the display unit 151 and the sound output module 152 may be a type of the alarm unit 153. The display unit 151 and the sound output module 152 may be connected to the display unit 151 or the sound 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 suction force of the air through the injection port or the suction port, a touch on the skin surface, contact of 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 unit 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, For example. The memory unit 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 unit 160 may store data on vibration and sound of various patterns output when the 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. Accordingly, the identification device can be connected to the 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 power supply unit 190 may include, for example, a battery, a connection port, a power supply control unit, and a charge monitoring unit.

The battery may be an internal battery configured to be chargeable, and may be detachably coupled to the terminal body for charging or the like. The connection port may be configured as an example of an interface 170 through which an external charger for supplying power for charging the battery is electrically connected.

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. [

2 is a perspective view of a mobile terminal according to an embodiment of 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 of the mobile terminal 100 includes a case 101, 102 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.

In some cases, electronic components may be mounted on the surface of the rear case 102 as well. Electronic components mounted on the surface of the rear case 102 include a battery, a USIM card, a memory card, and the like which are detachable by the user. At this time, the rear case 102 may further include a rear cover 103 for covering the surface thereof. When the rear cover 103 is removed, the surface of the rear case 102 is exposed.

As shown in FIG. 3, when the rear cover 103 is coupled, only a side surface of the rear case 102 may be exposed. When the size of the rear cover 103 is reduced, Some may also be exposed. When the rear cover 103 covers the entire rear surface of the rear case 102, an opening 103 '(see FIG. 4) for exposing the camera 121' or the sound output module 152 ' .

The cases 101, 102, and 103 may be formed by injection molding synthetic resin or may be formed of a metal material such as stainless steel (STS) or titanium (Ti).

The display unit 151, the sound output module 152, the camera 121, the user input units 130/131 and 132, the microphone 122, the interface 170, and the like may be disposed in the terminal cases 101 and 102.

The display unit 151 occupies most of the main surface of the front case 101. A sound output module 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 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, 132, and 133. The operation units 131, 132, and 133 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 a command such as start, end, scroll, and the like, and the second operation unit 132 inputs a command such as the adjustment of the sound output from the sound output module 152 And the third operation unit 133 can receive commands such as activation / deactivation of the touch recognition mode of the display unit 151 and the like.

The operation units 131, 132 and 133 may have a button system recognized when a user applies pressure and a touch sensor 137 may be provided to the operation units 131, 132 and 133 in addition to the display unit 151 So that the user's command can be received only by the user's touch.

The first antenna radiator may be arranged to be exposed to the outside of the mobile terminal. As shown in FIG. 2, the first antenna radiator may be disposed at an end of the mobile terminal as a part of the case. As the functions of the mobile terminal are diversified, various types of wireless communication technologies can be applied and positioned at the end of the mobile terminal to minimize the interference between the first antenna radiators.

3 is a rear perspective view of the mobile terminal shown in FIG.

Referring to FIG. 3, 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. 2), 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 such that they can be rotated or pop-up.

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 module 152 'may be additionally disposed on the rear side of the terminal body. The sound output module 152 'on the rear side of the body may implement the stereo function together with the sound output module 152 (see FIG. 2) on the front side of the body, and may be used for the implementation of the speakerphone mode in a call.

In addition to the antenna for talking and the like, a broadcast signal reception 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.

The cases 101, 102, and 103 of the present invention partially include a metal portion 103a, and the metal portion 103a is located on the back side. In the case of the mobile terminal having the structure in which the battery 191 is detachable, the metal part 103a is disposed on the detachable battery cover 103 and the battery cover 103 is omitted in the case of the battery integrated type. Can be located.

FIG. 4 is a rear perspective view showing a rear surface of a rear case of a mobile terminal according to an embodiment of the present invention. FIG. 4, the front case 101, the rear case 102, the rear cover (or the battery cover) 103, the camera 121 ', the interface 170, the microphone 122, the sound output module 152 A battery 191, a battery mounting portion 104, a USIM card mounting portion 166, and a memory card mounting portion 167 are shown.

The rear case 102 may have a space on which external components such as the battery loading unit 104, the USIM card loading unit 166, and the memory card loading unit 167 can be mounted. In general, an external component mounted on the surface of the rear case 102 is used to extend the functions of the mobile terminal 100 in order to satisfy diversified functions of the mobile terminal 100 to be.

As the performance of the mobile terminal 100 is diversified, a battery 191 may be replaced with a battery 191 as shown in FIG. 4 to compensate for a large power consumption. In the case of the interchangeable type, a battery mounting portion 104 is formed on the surface of the rear case 102 so that a user can attach and detach the battery. The battery mounting portion 104 is provided with a connection terminal to be electrically connected to a component mounted inside the case.

4, the USIM card mounting portion 166 and the memory card mounting portion 167 may be formed on the side of the battery mounting portion 104 or on the bottom surface of the battery mounting portion 104, May be formed to be exposed to the outside. In this case, the size of the battery mounting portion 104 can be larger, and the size of the battery 191 can be increased.

4 shows a structure in which the USIM card mounting portion 166 and the memory card mounting portion 167 are mounted on the rear surface of the rear case 102. In addition, Do.

The rear cover 103 covers the surface of the rear case 102 and fixes the battery 191, the USIM card, the memory card and the like mounted on the rear case 102 so as not to be detached, And protects the external components from foreign matter. A waterproof structure (not shown) for sealing the rear case 102 and the rear cover 103 when the rear case 102 and the rear cover 103 are coupled to each other to prevent water from being injected into the external components.

The first antenna radiator 200 of the present invention is characterized in that it is possible to reduce the separation distance from the metal portion 103a of the rear cover 103. [ An upper portion and a lower portion of the rear cover 103 are made of a nonconductive material such as an injection molded product 103b for the distance from the first antenna radiator 200 and a metal portion 103a is disposed in the middle portion.

The first antenna radiator 200 located at one end of the mobile terminal may be located at the top in the drawing, but may be located at the bottom. In addition to the first antenna radiator 200, an additional antenna may be further provided for communication GNSS communication such as Bluetooth or WiFi. Although not shown, a mobile communication module 112 for transmitting / receiving a radio signal to / .

5 is a conceptual diagram illustrating an antenna positioned at one end of a mobile terminal of the present invention. 5, the first antenna radiator 200 is connected to the metal part 103a of the main board 185 and the case 101, 102,

The main board 185 is equipped with various elements for controlling the functions of the mobile terminal and supplies power to the components of the mobile terminal 100 (feed stage) and a ground plane 185 ' do. The first antenna radiator 200 is connected to the feed terminal 185 "and the ground plane 185 'of the main board 185. The feed terminal 185" supplies power to the first antenna radiator 200 And the first antenna radiator 200 is grounded via the ground plane 185 '.

A feeding line 220 connecting the first antenna radiator 200 and the feed terminal 185 "of the main board 185 and a ground line 210 connecting to the ground plane 185 ' A feed line 220, a first antenna radiator 200, a ground line 210, and a ground plane 185 '. An electromagnetic field is formed by a current flowing along the loop and a signal can be transmitted and received.

The frequency of a signal that can be transmitted / received by the first antenna radiating element 200 varies depending on the length of the loop. The length of the first antenna radiator 200 can be adjusted or the length of the ground line 210 or the feeding line 220 can be adjusted according to the frequency of a signal to be transmitted and received.

5, the feed line 220 and the ground line 210 are positioned so as to be shifted to one side from the middle of the first antenna radiator 200, and the transmission and reception lines 220 and the ground line 210 are disposed on one side and the other side of the first antenna radiator 200, The signals of two or more frequency bands can be transmitted and received. That is, the short side receives the high frequency signal and the long side receives the low frequency signal.

However, in the case of a mobile terminal using a case including the metal part 103a, an electromagnetic field is confined between the main board 185 and the metal part 103a, thereby obstructing the formation of an electromagnetic field in the first antenna radiator 200, There is a problem that the transmission and reception performance of signals through the antenna radiator 200 is deteriorated.

The ground line 210 is connected not only to the ground plane 185 'of the main board 185 but also to the metal part 103a of the case so that an electromagnetic field is trapped between the metal part 103a and the main board 185 Eliminate the problem.

FIG. 6 is a sectional view showing a grounding relationship between the first antenna radiator 200 of the present invention and a metal portion 103a of a case, and FIG. 7 is an exploded sectional view of FIG. 6 and 7, one side of the ground line 210 is connected to the first antenna radiator 200 and the other side is connected to the metal part 103a and the ground plane 185 'of the main board 185 . 6, a flexible circuit board 210 having a metal pattern may be used. A part of the flexible circuit board is located on the outer surface of the rear case 102, And extends through the inside of the case.

One side of the flexible circuit board 210 may extend to the inside of the case for connection with the first antenna radiator 200 and may be inserted through the flexible circuit board 210 and the rear case 102 as shown in FIG. Or may be connected via a screw 215 of a metal material.

The other side of the ground line 210 is connected to both the main board 185 and the metal portion 103a of the rear cover 103. [ The main board 185 may have an elastic terminal 217 for connection with the flexible circuit board 210. Since the rear case 102 and the main board 185 are manufactured and assembled as shown in FIG. 7, it is difficult to connect the rear case 102 and the main board 185 by soldering. Accordingly, a terminal such as a C-clip 217 including a leaf spring having elasticity may be provided on the ground plane 185 'and electrically connected to the ground line 210. [

And a terminal 217 which is elastically deformed and connected to the metal portion 103a for connection of the rear cover 103 and the ground line 210. [ Since the rear cover 103 can not be separated from the main body case (rear case 102) for battery replacement when the rear cover 103 and the grounding line 210 can not be separated from each other, . As the connection terminal 218, for example, a seed-clip, a finger clip, or the like used for connection with the main board 185 may be used.

The rear cover 103 is connected to the ground line 210 at the time of coupling and is separated from the ground line 210 at the time of coupling the rear cover 103. The performance of the antenna can be maintained because the first antenna radiator 200 is connected to the ground plane 185 'of the main board 185 through the ground line 210 even if the rear cover 103 is disconnected.

The first antenna radiator 200 of the present invention is simultaneously grounded to the metal portion 103a of the rear cover 103 and the ground plane 185 'of the main board 185 when the rear cover 103 is engaged, When the cover 103 is detached, only the ground plane 185 'of the main board 185 is grounded.

8 is a cross-sectional view of a portion where the feed line 220 connecting the first antenna radiator 200 and the feed terminal 185 "of the main board 185 is located. The main board 185 receiving power from the battery And a current is supplied to the first antenna radiator 200 by receiving power.

9 is a conceptual view illustrating the feeding and grounding relationship of the first antenna radiator 200. The first antenna radiator 200 is connected to the feeding terminal 185 'of the main board 185 through the feeding line 220 The ground plane 185 'of the main board 185 and the metal portion 103a of the rear cover 103 are grounded through the ground line 210. [

9, the feed line 220 and the ground line 210 are disposed at a position offset from the center of the first antenna radiator 200 in one direction, and one side receives a signal in a high frequency band and the other side receives a signal in a low frequency Band signal can be received.

At this time, the direction in which the feed line 220 and the ground line 210 are shifted depends on the position of the second antenna radiator positioned at the lower end. And may be positioned in the same direction as the second antenna radiator to minimize the interference of the lower second antenna.

That is, when the feeding and grounding of the second antenna radiator are located on the right side, the ground line 210 and the feeding line 220 of the first antenna radiator 200 are also positioned on the right side, and the feeding and grounding of the second antenna radiator are positioned on the left The ground line 210 of the first antenna radiator 200 and the feeder line 220 are also located on the left side. When the antenna is positioned in the same direction, the performance of the antenna for the low frequency band signal can be improved.

The length of the loop formed by the feed line 220, the first antenna radiator 200, and the ground line 210 is related to the frequency of a signal to be transmitted and received. Depending on the size of the mobile terminal, To the left and right side portions of the mobile terminal. At this time, since the distance from the metal part 103a of the rear cover 103 is required, the size of the metal part 103a is reduced.

The first antenna radiator 200 may be formed as a straight line by omitting the bent portion 201 of the first antenna radiator 200 and the reduced length may be defined as the length of the feed line 220 or the ground line 210 To compensate for the length of the entire loop. If the bent portion of the first antenna radiator 200 is omitted, a sufficient distance from the first antenna radiator 200 can be secured even if the size of the metal portion 103a is made larger in the rear cover 103, The degree of freedom in the design of the device is increased.

11, the first antenna radiator 200 includes a display unit 151 mounted on a front surface thereof, a rear main board 185 mounted thereon, and a camera 121, a microphone 122, a receiver 152, And the middle frame 105 on which the various components of the apparatus are mounted. The middle frame 105 has a metal plate 105a made of a metal material for grounding to prevent the display unit 151 from being damaged while supporting the display unit 151 on the backside.

However, since the metal plate 105a is difficult to form irregularities for stably mounting various components, the metal plate 105a includes an injection molded product 105b formed by double injection into the metal plate 105a. The metal plate 105a may be partially buried in the extrudate 105b and partially exposed to the outside as shown in FIG. The upper and lower portions of the middle frame 105 are positioned with the extrudate 105b and the first antenna radiator 200 is disposed apart from the metal plate 105a by the extrudate 105b.

The metal plate 105a is also made of a metal and resonance phenomenon may occur in the metal plate 105a and the metal portion 103a so that the metal portion 103a and the metal plate 105a are electrically connected The resonance phenomenon can be eliminated by 102 'in FIG. The upper and lower portions of the metal plate 105a are covered with the injection molded product 105b and are electrically connected to the metal portion 103a on the left and right sides of the metal plate 105a.

The resonance phenomenon can be further reduced by connecting the first antenna radiator 200 to the vicinity of the first antenna radiator 200. When the first antenna radiator 200 is positioned on the upper side of the mobile terminal 100, And the metal plate 105a. The side surfaces of the body cases 101 and 102 may partly include the conductive material 102 'that partially exposes the metal plate 105a or is electrically connected to the metal plate 105a.

As shown in FIG. 12, in addition to the first antenna radiator 200 of the present invention, it may further include radiation patterns 230 and 235 for additional wireless communication. The radiation patterns 230 and 235 may be formed on the surface of the rear case 102 and between the first antenna radiator 200 and the metal portions 103a of the rear cover 103, And can be formed at a position covered by the non-metal portion 103a of the rear cover 103 when the rear cover 103 is coupled to the rear case 102. [

The radiation patterns 230 and 235 are connected to the feeding end 185 'of the main board 185 in the same manner as the first antenna radiator 200 and fed to the ground plane 185' The radiation pattern 235 located on the right side of the cover 103 is grounded by being connected to the metal portion 103a of the cover 103. As in the case of the first antenna radiator 200, 185 'and the metal part 103a, and only the main board 185 is grounded when the rear cover 103 is detached.

The radiation pattern 230 located on the left side of the drawing is connected to the feed line 220 of the first antenna radiator 200. That is, the electromagnetic field can be formed by supplying power through the feed line 220 such as the first antenna radiator 200.

The first antenna radiator 200 can be used as an antenna for radio communication using a MRD (Mobile Receive Diversity) method or a MIMO (Multiple-Input Multiple-Output) method capable of transmitting and receiving radio waves of a wide frequency band.

MRD is a communication method for receiving various frequencies in a mobile terminal, and MIMO is a wireless communication technique for increasing data transmission / reception rate by transmitting / receiving data using a plurality of antennas in a base station and a terminal.

The radiation pattern 230 coupled to the feed line 220 of the first antenna radiator 200 may be used to receive signals from a satellite positioning system, such as a Global Navigation Satellite System (GNSS). The GNSS is a satellite positioning system including the aforementioned GPS and is used for locating the mobile terminal.

The radiation pattern 235 separately connected to the first antenna radiator 200 can transmit and receive signals in a high frequency band. The high-frequency signal can be used as an antenna for short-range wireless communication such as WIFI or Bluetooth since the distance the signal reaches is short.

13 is a graph for explaining the efficiency of the first antenna radiator 200 according to the present invention in which a thin line is formed between the metal portion 103a of the rear cover 103 and the ground plane 185 ' And the thick lines indicate the case where only the metal portion 103a of the rear cover 103 is grounded. When both are grounded, efficiency is increased in the low frequency pattern.

As described above, according to at least one embodiment of the present invention, even if a metallic material is used as a case, the formation of an electromagnetic field between the metallic case and the main board 185 can be minimized, .

Further, the distance between the first antenna radiator 200 and the metal part 103a of the case can be reduced, and the degree of freedom of design can be increased when the metal material is used in the case.

In addition, even if the metal case is a detachable battery cover, the performance can be maintained even if the metal material is detached.

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.

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 101, 102: case
103: rear cover 103 ': metal part
105: middle frame 105a: metal plate
110: wireless communication unit 120: A / V input /
130: user input unit 140: sensing unit
150: output unit 160: memory
170: interface unit 180: control unit
185: main board 185 ': ground plane
185 ": Feed stage 190: Power supply
200: first antenna radiator 210, 213: ground line
215: screw 217:
218: connection terminal 220, 223: feeding line
230, 235: radiation pattern

Claims (17)

A case including a conductive metal part;
A main board mounted inside the case and having a feed end and a ground plane;
A first antenna radiator disposed apart from the metal portion and the ground plane;
A feed line electrically connecting the feed end and the first antenna radiator; And
And a ground line electrically connecting the ground plane and the metal portion to the first antenna radiator. The method according to claim 1,
The case
A main body case mounted inside the main board; And
And a rear cover detachably attached to a rear surface of the main body case and having the metal portion. 3. The method of claim 2,
The ground line
Wherein the first antenna radiator is connected to the first antenna radiator, and the second antenna radiator is connected to the metal part and the feeding terminal. The method of claim 3,
Wherein one side of the flexible circuit board is located on an outer surface of the main body case,
And a screw connected to the first antenna radiator through the flexible circuit board and the main body case. The method of claim 3,
And a connection terminal connected to the pattern on the other side of the flexible circuit board and elastically deformed when the rear cover is coupled with the main body case and connected to the metal part. The method of claim 3,
The feed stage
And a C-clip connected to the other side of the flexible circuit board. The method according to claim 1,
Wherein the first antenna radiator is exposed to the outside of the case to form a part of the case. The method according to claim 1,
Wherein the ground line and the feed line are biased to one side from the center of the first antenna radiator and connected to the first antenna radiator. 9. The method of claim 8,
The first antenna radiator receiving signals of a first frequency and a second frequency,
Wherein a ratio of a distance from a position where the ground line and the feeder line are coupled to one end of the first radiator to a second end of the first radiator corresponds to the first frequency and the second frequency ratio. . 9. The method of claim 8,
The first antenna radiator being located on a first one of the four sides of the mobile terminal,
And a second antenna radiator positioned at one side of a second side not adjacent to the first side,
Wherein the feeding and grounding of the second antenna are biased in one direction such as the ground line and the feeding line. The method according to claim 1,
Wherein the ground line and the feed line have bent portions,
Wherein the first antenna radiator has a straight bar shape. The method according to claim 1,
Wherein the first antenna radiator is located at an upper end or a lower end of the mobile terminal. 13. The method of claim 12,
Wherein the first antenna radiator is C-shaped extending leftward and rightward from an upper end of the mobile terminal. The method according to claim 1,
Wherein a distance between an end of the first antenna radiator and the metal portion is 1 mm or more. The method according to claim 1,
Further comprising an antenna radiation pattern located between the metal portion and the first antenna radiator and electrically connected to the feed portion and the metal portion and formed on a surface of the case. The method according to claim 1,
Further comprising: a middle frame which is located inside the case and on which the main circuit board and the electronic component are mounted, the middle frame including a metal plate and an injection-
Wherein the first antenna radiator is spaced apart from the metal plate at an end of the middle frame. 17. The method of claim 16,
Wherein the metal part is electrically connected to the metal plate.

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