KR20150065506A - Watch type mobile terminal - Google Patents

Abstract

A watch type mobile terminal according to an embodiment of the present invention comprises: a conductive case operating as a radiator of an antenna for transceiving wireless signals in a first frequency; first and second bands connected to both sides of the conductive case, respectively; a first conductive member formed in the first band to resonate in a second frequency; and a second conductive member formed in one of the bands for controlling the first frequency and connected to the conductive case.

Description

[0001] WATCH TYPE MOBILE TERMINAL [0002]

The present invention relates to a portable terminal configured to be worn on a human body such as a wrist or an arm.

As the functions are diversified, the terminal is implemented in the form of a multimedia device having a complex function of, for example, taking pictures or moving pictures, playing music or moving picture files, receiving games and receiving broadcasts have.

The terminal can move And may be divided into a mobile terminal and a stationary terminal depending on whether the mobile terminal is a mobile terminal or a mobile terminal. A portable terminal is a portable device having one or more functions capable of performing voice and video communication, capable of inputting / outputting information, and storing data, which can be carried while being portable.

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.

Especially, it is considered to be a personal portable device, and a mobile terminal is applied various designs to express its own personality. The mechanical form of a conventional mobile terminal is a size that can hold the device by hand, and it is carried by carrying it or carrying it in a pocket or the like. In addition, a watch-type mobile terminal which wears a terminal like clothes, jewelry or a wrist watch is proposed.

Therefore, a new scheme that the watchdog mobile terminal can exhibit improved wireless transmission / reception performance can be considered.

SUMMARY OF THE INVENTION The present invention has been made in view of the above points, and it is an object of the present invention to provide a watch-type mobile terminal which can be worn on a human body such as a wrist or an arm, And to provide a mobile terminal which realizes good radio performance even in a plurality of frequency bands.

According to another aspect of the present invention, there is provided a watch-type mobile terminal comprising: a conductive case that operates as a radiator of an antenna so as to transmit and receive a radio signal at a first frequency; A first conductive member formed on the first band and configured to resonate at a second frequency and a second conductive member formed on either of the bands to adjust the first frequency, And a second conductive member connected to the conductive case.

According to an embodiment of the present invention, a third conductive member, which is formed on a band where the second conductive member is not formed and is connected to the conductive case, is provided so that the first frequency can be adjusted together with the second conductive member .

According to another aspect of the present invention, there is further provided a circuit board formed with a wireless communication module inside the conductive case, and each of the conductive members may be connected to the circuit board.

According to one example of the present invention, the second conductive member may be connected to the conductive case via the circuit board.

According to an embodiment of the present invention, the conductive case and the circuit board are connected at different points by first and second connection parts, and the first connection part connects the conductive case and the power feed part formed on the circuit board to each other And the second connection portion connects the conductive case and the ground formed on the circuit board to each other.

According to an example of the present invention, the second connection unit may include at least one lumped element, and may be configured to adjust the first frequency.

According to an embodiment of the present invention, the first and second connection portions may be spaced apart from each other in a diagonal direction so as to adjust a movement path of a current flowing along the conductive case from the first connection portion.

The watchdog mobile terminal according to at least one embodiment of the present invention configured as described above can configure the mobile terminal to implement a plurality of antenna devices more compactly while exhibiting better antenna performance.

Further, by changing the positions of the connection portions and the lengths of the conductive members while transmitting and receiving multi-frequency bands by using a plurality of antenna devices, each frequency can be easily controlled. And, the antenna devices can be realized in a form that receives better interference.

1 is a block diagram of a mobile terminal according to an embodiment of the present invention;
2 is a perspective view of a watch-type mobile terminal according to an embodiment of the present invention;
3 is an exploded perspective view of the watch-type mobile terminal shown in Fig.
FIG. 4A is a conceptual diagram showing a conductive case and a circuit board according to an embodiment of the present invention, and FIG. 4B is a conceptual diagram showing an example in which a conductive case and a circuit board are connected.
FIGS. 5A to 5C are conceptual diagrams showing a current path of a current according to the positions of the first connection part and the second connection part, and FIG. 5D is a view showing a voltage standing wave ratio (VSWR) according to the positions of the first connection part and the second connection part Concept illustration.
FIG. 6A is a conceptual diagram showing an example in which a second conductive member is formed in a band, and FIG. 6B is a conceptual diagram showing a voltage standing wave ratio (VSWR) according to presence or absence of a second conductive member formed in a band.
FIG. 7A is a conceptual diagram showing an example in which a first conductive member is formed in a band, and FIG. 7B is a conceptual diagram showing an isolation diagram according to presence or absence of a second conductive member formed in a band. FIG.
8 illustrates an example of conductive members connected to a circuit board;

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings, wherein like reference numerals are used to designate identical or similar elements, and redundant description thereof will be omitted. 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. In the following description of the embodiments of the present invention, a detailed description of related arts will be omitted when it is determined that the gist of the embodiments disclosed herein may be blurred. In addition, it should be noted that the attached drawings are only for easy understanding of the embodiments disclosed in the present specification, and should not be construed as limiting the technical idea disclosed in the present specification by the attached drawings.

The mobile terminal described in this specification includes a mobile phone, a smart phone, a laptop computer, a digital broadcasting terminal, a personal digital assistant (PDA), a portable multimedia player (PMP), a navigation device, a slate PC , A tablet PC (tablet PC), and an ultrabook (ultrabook). 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 at least one of 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. The broadcast management server may refer to a server for generating and transmitting broadcast signals and / or broadcast related information, or a server for receiving broadcast signals and / or broadcast related information generated by the broadcast management server and transmitting the generated broadcast signals and / or broadcast related information. The broadcast signal may include a TV broadcast signal, a radio broadcast signal, a data broadcast signal, and a broadcast signal in which a data broadcast signal is combined with a TV broadcast signal or a radio broadcast signal.

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

The broadcast-related information may exist in various forms. For example, 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 And a Digital Broadcasting System (ISDB-T) (Integrated Services Digital Broadcast-Terrestrial). 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 transmits and receives radio signals to at least one of a base station, an external terminal, and a server on a mobile communication network. The wireless signal may include various types of data depending on a voice call signal, a video call signal or a text / multimedia message transmission / reception.

The mobile communication module 112 is configured to implement a video communication mode and a voice communication mode. The video call mode refers to a state of talking while viewing a video of the other party, and the voice call mode refers to a state in which a call is made without viewing the other party's video. In order to implement the video communication mode and the voice communication mode, the mobile communication module 112 is configured to transmit and receive at least one of voice and image.

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. Examples of the wireless Internet technology include a wireless LAN (WLAN), a wireless fidelity (WiFi) direct, a DLNA (Digital Living Network Alliance), a Wibro (Wireless broadband), a Wimax (World Interoperability for Microwave Access), HSDPA Can be used.

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, NFC (Near Field Communication), etc. are used as short range communication technology .

The position information module 115 is a module for obtaining the position of the mobile terminal, and representative examples thereof include a Global Position System (GPS) module or a Wireless Fidelity (WiFi) module.

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 an external device through the wireless communication unit 110. [ Further, the position information of the user and the like can be calculated from the image frame obtained by the camera 121. [ 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 according to a control command for controlling the operation of the mobile terminal 100 applied by the user. 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 may sense the position of the mobile terminal 100 such as the open / close state of the mobile terminal 100, the position of the mobile terminal 100, the presence of the user, the orientation of the mobile terminal, And generates a sensing signal (or sensing signal) for sensing the current state and controlling the operation of the mobile terminal 100. For example, the sensing unit 140 may detect whether the slide phone is opened or closed when the mobile terminal 100 is in the form of a slide phone. The sensing unit 140 may sense whether the power supply unit 190 is powered on, whether the interface unit 170 is connected to an external device, and the like.

The output unit 150 may include a display unit 151, an audio output module 153, an alarm unit 154, a haptic module 155, and the like in order to generate output related to visual, auditory, have.

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 display unit 151 displays the photographed and / or received video or UI and GUI.

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, a 3D display, and an e-ink 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 the 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.

Also, the display unit 151 may be configured as a stereoscopic display unit 152 for displaying a stereoscopic image.

Here, a stereoscopic image represents a 3-dimensional stereoscopic image, and a 3-dimensional stereoscopic image represents a progressive depth and reality in which objects are located on a monitor or a screen, It is an image that makes you feel the same as the space. 3D stereoscopic images are implemented using binocular disparity. The binocular parallax means a parallax caused by the position of two eyes away from each other. When two eyes see two different images and the images are transmitted to the brain through the retina and fused, the depth and real feeling of the stereoscopic image can be felt .

The stereoscopic display unit 152 may be applied to a three-dimensional display system such as a stereoscopic system (glasses system), an autostereoscopic system (no-glasses system), and a projection system (holographic system). The stereoscopic method, which is widely used in home television receivers, includes a Wheatstone stereoscopic method.

Examples of the autostereoscopic method include a parallax barrier method, a lenticular method, an integral imaging method, and a switchable lens method. The projection method includes a reflection type holographic method and a transmission type holographic method.

Generally, 3D stereoscopic images consist of left image (left eye image) and right image (right eye image). A top-down method of arranging a left image and a right image in one frame according to a method in which a left image and a right image are combined into a three-dimensional stereoscopic image, A checker board system in which pieces of a left image and a right image are arranged in a tile form, a left-to-right (right-side) Or an interlaced method in which rows are alternately arranged, and a time sequential (frame-by-frame) method in which right and left images are alternately displayed in time.

In addition, the 3D thumbnail image can generate a left image thumbnail and a right image thumbnail from the left image and right image of the original image frame, respectively, and combine them to generate one 3D thumbnail image. In general, a thumbnail means a reduced image or a reduced still image. The left image thumbnail and the right image thumbnail generated in this way are displayed on the screen with a difference of the left and right distance by the depth corresponding to the parallax between the left image and the right image, thereby exhibiting a stereoscopic spatial feeling.

The left and right images necessary for realizing the three-dimensional stereoscopic image can be displayed on the stereoscopic display unit 152 by a stereoscopic processing unit (not shown). The stereoscopic processing unit receives a 3D image and extracts a left image and a right image from the 3D image, or receives a 2D image and converts it into a left image and a right image.

On the other hand, when a display unit 151 and a sensor (hereinafter, referred to as 'touch sensor') that detects a touch operation form a mutual layer structure (hereinafter referred to as a 'touch screen' It can also be used as an input device in addition to the 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 where the touch object is touched on the touch sensor but also the pressure at the time of touch. Here, the touch object may be a finger, a touch pen, a stylus pen, a pointer, or the like as an object to which a touch is applied to the touch sensor.

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

Referring to FIG. 1, a proximity sensor 141 may be disposed in an inner region of the mobile terminal or in the vicinity of the touch screen, which is surrounded by the touch screen. The proximity sensor 141 may be provided as an example of the sensing unit 140. The proximity sensor 141 refers to a sensor that detects the presence of an object approaching a predetermined detection surface or an object existing in the vicinity of the detection surface without mechanical contact using an electromagnetic force or an infrared ray. The proximity sensor 141 has a longer life than the contact type sensor and its utilization is also high.

Examples of the proximity sensor 141 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. When the touch screen is electrostatic, it is configured to detect the proximity of the pointer by a change of the electric field along the proximity of an object having conductivity (hereinafter, referred to as a pointer). 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 touching the pointer on the screen is called "contact touch. &Quot; The position where the pointer is proximately touched on the touch screen means a position where the pointer is vertically corresponding to the touch screen when the pointer is touched.

The proximity sensor 141 detects a proximity touch and a proximity touch pattern (for example, 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.

In the case where the three-dimensional display unit 152 and the touch sensor have a mutual layer structure (hereinafter referred to as a 'three-dimensional touch screen') or a three-dimensional sensor that detects the touch operation and the stereoscopic display unit 152 are combined with each other The stereoscopic display unit 152 may also be used as a three-dimensional input device.

The sensing unit 140 may include a proximity sensor 141, a three-dimensional touch sensing unit 142, an ultrasonic sensing unit 143, and a camera sensing unit 144 as an example of the three-dimensional sensor.

The proximity sensor 141 measures the distance between the sensing surface (for example, a user's finger or a stylus pen) to which the touch is applied without mechanical contact using the force of the electromagnetic field or infrared rays. The terminal recognizes which part of the stereoscopic image has been touched using the distance. In particular, when the touch screen is of the electrostatic type, the proximity of the sensing object is detected by a change of the electric field according to the proximity of the sensing object, and the touch on the three-dimensional is recognized using the proximity.

The stereoscopic touch sensing unit 142 senses the strength or duration of a touch applied to the touch screen. For example, the three-dimensional touch sensing unit 142 senses a pressure to apply a touch, and when the pressing force is strong, recognizes the touch as a touch to an object located further away from the touch screen toward the inside of the terminal.

The ultrasonic sensing unit 143 is configured to recognize the position information of the sensing target using ultrasonic waves.

The ultrasound sensing unit 143 may include, for example, an optical sensor and a plurality of ultrasound sensors. The light sensor is configured to sense light, and the ultrasonic sensor is configured to sense ultrasonic waves. Since light is much faster than ultrasonic waves, the time it takes for light to reach the optical sensor is much faster than the time it takes for the ultrasonic waves to reach the ultrasonic sensor. Therefore, it is possible to calculate the position of the wave generating source using the time difference with the time when the ultrasonic wave reaches the reference signal.

The camera sensing unit 144 includes at least one of a camera 121, a photo sensor, and a laser sensor.

For example, the camera 121 and the laser sensor are combined with each other to sense a touch of a sensing target with respect to a three-dimensional stereoscopic image. When the distance information detected by the laser sensor is added to the two-dimensional image photographed by the camera, three-dimensional information can be obtained.

As another example, a photosensor may be stacked on a display element. The photosensor is configured to scan the movement of the object proximate to the touch screen. More specifically, the photosensor mounts photo diodes and TRs (Transistors) in a row / column and scans the contents loaded on the photosensor using an electrical signal that varies according to the amount of light applied to the photo diode. That is, the photo sensor performs coordinate calculation of the object to be sensed according to the amount of light change, thereby acquiring position information of the object to be sensed.

The audio output module 153 can 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 153 also outputs sound signals related to functions (e.g., call signal reception sound, message reception sound, etc.) performed in the mobile terminal 100. [ The sound output module 153 may include a receiver, a speaker, a buzzer, and the like.

The alarm unit 154 outputs a signal for notifying the occurrence of an event of the mobile terminal 100. Examples of events generated in the mobile terminal 100 include call signal reception, message reception, key signal input, touch input, and the like. The alarm unit 154 may output a signal for notifying the occurrence of an event by using a form other than the video signal or the audio signal, for example, vibration. The video signal or the audio signal may be output through the display unit 151 or the sound output module 153 so that the display unit 151 and the sound output module 153 may be classified as a part of the alarm unit 154 .

The haptic module 155 generates various tactile effects that the user can feel. A typical example of the haptic effect generated by the haptic module 155 may be vibration. The intensity and pattern of the vibration generated by the hit module 155 can be controlled by the user's selection or setting of the control unit. For example, the haptic module 155 may combine and output different vibrations or sequentially output the vibrations.

In addition to the vibration, the haptic module 155 may be configured to perform various functions such as 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 155 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 sense of the finger or arm. At least two haptic modules 155 may be provided according to the configuration of the mobile terminal 100.

The memory 160 may store a program for the operation of the controller 180 and temporarily store input / output data (e.g., a phone book, a message, a still image, a moving picture, etc.). The memory 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), a static random access memory (SRAM), a read-only memory (ROM), an electrically erasable programmable read-only memory (EEPROM), a programmable read- And may include a storage medium of at least one type of disk and 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 port for connecting a device equipped with a wired / wireless headset port, an external charger port, a wired / wireless data port, a memory card port, An audio I / O port, a video 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 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 terminal 100 through the interface unit 170. [

The interface unit 170 may be a path through which power from the cradle is supplied to the mobile terminal 100 when the mobile terminal 100 is connected to an external cradle, And various command signals may be transmitted to the mobile terminal 100. The various command signals or the power source input from the cradle may be operated as a signal for recognizing that the mobile terminal 100 is correctly mounted on the cradle.

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

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

In addition, if the state of the mobile terminal meets a set condition, the controller 180 can execute a lock state for restricting input of a control command of the user to the applications. In addition, the controller 180 may control the lock screen displayed in the locked state based on a touch input sensed through the display unit 151 in the locked state.

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 , Microprocessors, microprocessors, microprocessors, and other electronic units for carrying out other functions. In some cases, the embodiments described herein may be implemented by the controller 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.

The software code may 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 watch-type mobile terminal according to an embodiment of the present invention;

2, the portable terminal 100 includes a terminal body 101 having a display unit 151 exposed on an upper surface thereof. Both ends of the terminal body 101 can be worn on a human body such as a wrist or an arm As shown in Fig. The terminal body 101 is equipped with devices for various additional functions including a mobile communication module that enables communication with a base station, a network, a server device, or external devices in a communication network.

The terminal body 101 includes a plurality of cases forming an appearance. 2, the first case 103 and the second case 104 of those cases are exposed.

The upper surface of the first case 103 is provided with a window 102 formed to be transmissive so that the display portion 151 can be seen. A sound output unit 152 for outputting sound and a camera device 121 for photographing are disposed on one side of the display unit 151 inside the window 102.

The display unit 151 includes an LCD (Liquid Crystal Display) module, an OLED (Organic Light Emitting Diodes) module, and an e-paper for visually expressing information. The display unit 151 may include a touch pad for inputting by a touch method. Accordingly, if there is a touch on any one of the windows 102, contents corresponding to the touched position are input. The content input by the touch method may be a letter or a number, an instruction in various modes, a menu item which can be designated, and the like. A structure for enhancing the visibility of the display unit 151 in a bright place may be included in the upper portion of the display unit 151.

The sound output unit 152 may be called a receiver in the sense of outputting a reception sound and may be formed in the form of a loudspeaker for providing a larger sound volume such as a sound output of the system, a speakerphone mode, .

The camera device 121 is configured to capture a photograph or a moving image of a subject, and can be used as a device for obtaining an image of the user himself or herself during a video call.

A side button 131 for operation is disposed on the side surface of the main body 101 of the terminal. The side button 131 may be collectively referred to as an operation unit, and a command for controlling the operation of the portable terminal 100 may be received. The side button 131 can be employed in any manner as long as the user operates in a tactile manner with a tactile impression. The content input by the side button 131 can be set variously. For example, the side button 131 is used to turn on and / or off the power source, to control the camera device 121, to adjust the size of the sound output from the sound output unit 152, Mode, and the like.

The band 107 may be formed in a flexible shape so as to be easily worn on the human body. As an example, the band 107 may be formed of leather, rubber, plastics, or the like, and a plurality of unit layers may be stacked to form a multi-layered structure.

The band 107 may be provided with a fastener 108. The fastener 108 may be embodied by a buckle, a snap-fit hook structure, or a velcro (trademark) or the like, and may include a stretchable section or material . 2 shows an example in which the fastener 108 is buckled.

3 is an exploded perspective view of the watch-type mobile terminal shown in Fig.

3, the cases constituting the external appearance of the terminal body 101 include a first case 103 forming a peripheral shape of the window 102, and a second case 103 formed sequentially in the lower portion of the first case 103. [ And includes a case 104 and a third case 105.

The second case 104 forms a receiving space for mounting various components, and a seating groove is formed at an upper end thereof so that the first case 103 can be inserted and seated.

The first case 103, together with the window 102, is a portion of the portable terminal 100, which is easy to contact with the outermost object, and can be formed of a metal material so as to minimize wear and scratches. Further, The case 103 may be formed to be conductive to extend the ground of the antenna described later. Also, the first case 103 may be implemented as a 'ornament' existing on the surface of the 'case', in addition to a substantial role of 'case'.

On the other hand, the second case 104 is formed of a dielectric material to smoothly induce radiation of the antenna. The second case 104 may be formed of resin or the like which is easy to form a complicated internal shape.

The second case 104 includes a side surface inclined to form a soft side surface from the window 102. The third case 105, which is assembled to the lower side of the second case 104, So that it can be formed as a main ground. The third case 105 may include a removable cover 106 for inserting a SIM card or the like.

The watch-type mobile terminal 100 may include a plurality of antenna devices. Each of the antenna devices ANT1 and ANT2 may be configured to transmit and receive signals of different frequency bands and may be configured to transmit and receive signals (data signals, MIMO, etc.) of the same frequency band.

For example, the first antenna device ANT 1 may be formed to transmit and receive signals of the DCN 1x scheme or the PCS 1x scheme, and the second antenna device ANT 2 may be formed of a DCN EVDO (Evolution-Data Optimized or Evolution- Data Only) system.

In addition, when the first antenna apparatus ANT 1 transmits / receives a signal conforming to the LTE B4 scheme, the second antenna apparatus ANT 2 can be formed to transmit / receive signals conforming to the LTE B13 scheme.

Alternatively, when the first antenna device ANT 1 transmits / receives a signal corresponding to the voice service of the mobile terminal, the second antenna device ANT 2 may be configured to transmit / receive a data signal corresponding to the LTE service of the mobile terminal have.

In FIG. 3, the first and second bands 107a and 107b, which are coupled to both sides of the second case 104, are simplified by deleting a part of the outer appearance.

FIG. 4A is a conceptual diagram showing a conductive case and a circuit board according to an embodiment of the present invention, and FIG. 4B is a conceptual diagram showing an example in which a conductive case and a circuit board are connected.

Hereinafter, the second case 104 will be referred to as a conductive case 104.

4A and 4B, in the watch-type mobile terminal 100, the conductive case 104 and the circuit board 140 are connected to each other at two different points. The feeder portion formed on the circuit board 140 and the conductive case 104 may be connected to the ground at one side and the ground of the circuit board 140 and the conductive case 104 may be grounded at the other side.

The first connecting portion 161 and the second connecting portion 162 are spaced apart from each other in the diagonal direction when the first connecting portion 161 and the ground connecting portion are referred to as a second connecting portion 162 Can be confirmed.

5A to 5C are conceptual diagrams showing the paths of current flow depending on the positions of the first connection part 161 and the second connection parts 162a, 162b and 162c, And a voltage standing wave ratio (VSWR) according to the positions of the connection part 161 and the second connection parts 162a, 162b and 162c.

5A to 5C show examples in which the first connection portion 161 and the second connection portions 162a, 162b, and 162c are spaced apart from each other in the diagonal direction. That is, when the conductive case 104 constituting the antenna device is fed, current flows from the first connection part 161 along the conductive case 104 in different directions to the second connection parts 162a, 162b and 162c .

Here, the diagonal direction means that the first connection part 161 and the second connection parts 162a, 162b and 162c are not located on the same side but on the other side with respect to the circuit board 140 having a rectangular planar shape.

Referring to FIG. 5D, it can be seen that the antenna apparatus resonates in different frequency bands depending on the positions of the first connection unit 161 and the second connection units 162a, 162b, and 162c. In this way, the characteristics of the antenna can be changed by moving the positions of the first connection portion 161 and the second connection portions 162a, 162b, and 162c. That is, the resonance frequency can be easily tuned by moving the positions of the first connection part 161 and the second connection parts 162a, 162b, 162c.

6A is a conceptual diagram showing an example in which a second conductive member 172 is formed in a band, and FIG. 6B is a view showing a voltage standing wave ratio (VSWR) according to presence or absence of a second conductive member 172 formed in a band It is a conceptual diagram.

The second conductive member 172 may be formed in either band. As an example, a second conductive member 172 may be formed within the second band 107b, and a second conductive member 172 may be formed on either side of the second band 107b.

The second band 107b may be coupled to the conductive case 104 at both sides of the conductive case 104 and the second conductive member 172 may be connected to the circuit board 140. [ As a result, the conductive case 104 and the second conductive member 172 are electrically connected to each other via the circuit board 140. That is, the current path does not extend from the first connection portion 161 through the conductive case 104 to the second connection portion 162 but from the first connection portion 161 to the conductive case 104 and the second connection portion 162 and the circuit board 140 to the second conductive member 172, so that the path through which the electric current travels becomes longer. If the path through which the current travels becomes longer, the resonance frequency is lowered in the antenna, and resonates in a lower frequency band.

In other words, when the antenna device including the conductive case 104 resonates at the first frequency in the high frequency band, if the antenna device is further configured to include the second conductive member 172 connected to the circuit board 140, It is possible to resonate the antenna device even at the second frequency. As a result, the antenna apparatus can be operated in the multi-frequency band.

The second connection unit 162 may further include a frequency control unit 165 including at least one inductor and a capacitor. The frequency controller 165 changes the impedance of the antenna device so that the antenna device can exhibit antenna efficiency over a certain level at higher or lower frequencies.

The frequency adjuster 165 implemented by a combination of a capacitor or an inductor may operate as a shunt element or as a series element. When the frequency adjusting unit 165 is implemented as a shunt device, the resistance, which is a real part of the impedance, can be adjusted. For example, the inductor increases the resistance value and the capacitor decreases the resistance value. Tuning of the antenna device is possible.

Alternatively, if the frequency adjuster 165 is implemented as a serial device, the reactance, which is an imaginary part of the impedance, can be adjusted. For example, the inductance can be increased by increasing the reactance and the capacitor can be reduced in reactance, Tuning of the antenna device is possible.

The frequency adjuster 165 may be implemented as a conductive pattern, and each conductive pattern may be formed to function as a capacitor or an inductor. Alternatively, functions such as capacitors or inductors may be implemented as lumped elements.

When the second conductive member 172 is formed on one side of the conductive case 104, the third conductive member 173 may be formed on the other side. That is, the third conductive member 173 may be formed in the first band 107a, which is a band in which the second conductive member 172 is not formed. The third conductive member 173 may be connected to the conductive case 104 via the circuit board 140.

The third conductive member 173 is formed to be able to adjust the first frequency together with the second conductive member 172.

FIG. 7A is a conceptual diagram showing an example in which a first conductive member is formed in a band, and FIG. 7B is a conceptual diagram showing an isolation diagram according to presence or absence of a second conductive member 172 formed in a band.

A watch-type mobile terminal according to an embodiment of the present invention includes a plurality of antenna devices. The first antenna device is formed by using the conductive case 104 as a main radiator and the second antenna device is formed by using the first conductive member 171 as a main radiator.

The first antenna device is fed by the first feeder 161, and the second antenna device is fed by the second feeder 162.

In such a watchdog mobile terminal, when one of the antenna devices transmits a signal, a part of the transmitted signal may affect the other antenna device.

For example, when the first antenna device ANT 1 transmits a signal, another current induced by the current flowing along the surface of the first antenna device ANT 1 is applied to the surface of the second antenna device ANT 2 Can flow along. This mutual coupling exerts a greater influence as the distance d between the first antenna device ANT 1 and the second antenna device ANT 2 becomes smaller.

The mutual interference formed by the proximity of the first antenna device ANT 1 and the second antenna device ANT 2 results in loss of transmission power of the first antenna device ANT 1, (ANT 2) as well as adverse effects such as saturation or sensitivity degradation of the receiver. Further, the currents induced in the adjacent second antenna device ANT 2 distort the gain pattern.

This mutual interference can reduce the influence of the mutual interference by electrically isolating the first antenna device ANT 1 and the second antenna device ANT 2 from each other. A method may be used in which the first antenna device ANT 1 and the second antenna device ANT 2 are spaced apart from each other by λ / 2 times the wavelength corresponding to the fundamental frequency. However, in the case of a miniaturized terminal such as a mobile terminal, since a frequency of about 700 to 800 MHz is used, the value of? / 2 reaches 400 mm, which is practically impossible.

Particularly, in a system in which a plurality of antennas operating in MIMO or diversity are mounted, in order to smoothly transmit and receive signals, a first antenna (main antenna at the transmitting or receiving end) and a second antenna (Diversity or reception side sub-antenna of the MIMO system), the value of the mutual coupling and the related coefficient (Envelope Correlation Coefficient) must be low.

For example, as a required reception condition, the main antenna operates in the same way as a single receiver, the difference in gain between the two antennas is less than 6 dB, the Envelope Correlation Coefficient (ECC) is 0.5 The use of the main antenna always at the transmitting side, and the antenna to antenna isolation greater than 8 dB are satisfied, it can operate well as a MIMO antenna at the frequency of the LTE band.

Among the above requirements, it is most difficult to implement a MIMO antenna in a mobile terminal by implementing an ECC of 0.5 or less expressing a correlation between two antennas, except for antenna basic performance such as gain (gain) and bandwidth It is a point.

In order to satisfy such a condition, it is necessary that the two antenna devices are spaced apart from each other by a distance equal to or more than half a wavelength or that the polarization directions of the two antenna devices are orthogonal to each other as much as possible. However, for example, in the LTE system of the fourth generation mobile communication, a 700 MHz band is used. In this case, the half-wave length exceeds 400 mm, which may make it difficult to actually divide the two antenna apparatuses by half a wavelength or more have.

The present invention forms the second conductive member 172 to resonate at a frequency adjacent to the first conductive member 171 at S22 in order to reduce interference of adjacent antenna devices with each other.

As a result, parallel resonance occurs between the resonance due to the first conductive member 171 and the resonance due to the second conductive member 172, as shown in Fig. 7B, (Isolation) is improved. For this, the length of the second conductive member 172 may be formed to be approximately equal to the length of the first conductive member 171. Then, the length of the second conductive member 172 can be adjusted through trial and error.

8 is a view showing an example of conductive members connected to the circuit board 140. FIG.

The first conductive member 171 and the third conductive member 173 may be formed on the upper side of the circuit board 140, as shown in FIG. And a second conductive member 172 may be formed on the lower side.

The second and third conductive members 172 and 173 are connected to the conductive case 104 through the circuit board 140 when the conductive case 104 is fed by the first feeder 161, 104). ≪ / RTI >

Then, the first conductive member 171 may be supplied with power by the second power feeder 162.

The feeding part is a part for supplying current to each radiator, and may be constituted by a combination of a balun, a phase shifter, a divider, an attenuator, and an amplifier. The first and second feeders 161 and 162 may be formed on the circuit board 140. The first power feeder 161 may include a first connection portion 161 as a power supply connection portion. Accordingly, in the drawings, the first feed portion is denoted by the same reference numeral as the first connection portion.

The first connection part 161 may electrically connect the feeding part and the radiator, or may supply the radiator with EM (Electro-Magnetic) feeding method. The feed connection unit may include at least one of a feed plate, a power supply clip, and a feeder line.

The above-described watch mobile terminal is not limited to the configuration and method of the above-described embodiments, but the embodiments may be modified such that all or some of the embodiments are selectively combined so that various modifications can be made. .

Claims (7)

A conductive case that operates as a radiator of the antenna to transmit and receive radio signals at a first frequency;
First and second bands respectively coupled to both sides of the conductive case;
A first conductive member formed in the first band and configured to resonate at a second frequency; And
And a second conductive member formed on any one of the bands and connected to the conductive case so as to adjust the first frequency. The method according to claim 1,
Further comprising a third conductive member formed on a band where the second conductive member is not formed and connected to the conductive case so as to adjust the first frequency together with the second conductive member. terminal. The method according to claim 1,
Further comprising a circuit board formed with a wireless communication module inside the conductive case,
And each of the conductive members is connected to the circuit board. The method of claim 3,
And the second conductive member is connected to the conductive case via the circuit board. The method of claim 3,
The conductive case and the circuit board are connected at different points by the first and second connection parts,
Wherein the first connection part connects the conductive case to a power feed part formed on the circuit board,
And the second connection portion connects the conductive case and the ground formed on the circuit board to each other. 6. The method of claim 5,
Wherein the second connection unit includes at least one lumped element and is configured to adjust the first frequency. 6. The method of claim 5,
Wherein the first and second connection portions are spaced apart from each other in a diagonal direction so as to adjust a movement path of a current flowing along the conductive case from the first connection portion.

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