KR20170019071A - Mobile terminal and method for controlling the same - Google Patents

Abstract

A mobile terminal and a control method thereof are disclosed. The mobile terminal and the control method thereof may control an output of a plurality of LEDs disposed on the rear surface of a plurality of menu terminal bodies that can control functions of the terminal according to the status of the terminal, and display the indicators by an indicator. According to the present invention, the convenience of use can be improved by intuitively displaying the terminal control menu using the LED operation keys formed on the rear surface of the terminal.

Description

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

The present invention relates to a mobile terminal having an operation key on the rear side and a control method thereof.

A terminal can be divided into a mobile terminal (mobile / portable terminal) and a stationary terminal according to whether the terminal can be moved. The mobile terminal can be divided into a handheld terminal and a vehicle mounted terminal according to whether the user can directly carry the mobile terminal.

The functions of mobile terminals are diversified. For example, there are data and voice communication, photographing and video shooting through a camera, voice recording, music file playback through a speaker system, and outputting an image or video on a display unit. Some terminals are equipped with an electronic game play function or a multimedia player function. In particular, modern mobile terminals can receive multicast signals that provide visual content such as broadcast and video or television programs.

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

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

In particular, a method for utilizing an operation key formed on the rear surface of the terminal as various menu buttons according to the state of the terminal is being studied.

The present invention is directed to solving the above-mentioned problems and other problems. Another object of the present invention is to provide a mobile terminal and a control method therefor which can display a menu to be executed in a terminal by a specific indicator by controlling the output of a plurality of LEDs (Light Emitting Diodes) It is for that purpose.

According to an aspect of the present invention, there is provided a display device including a plurality of light emitting diodes (LEDs) disposed on a rear surface of a terminal body, And at least one control key for controlling the output of the plurality of LEDs so that the at least one operation key displays a volume control indicator when the media related application is executed Thereby providing a mobile terminal.

According to another aspect of the present invention, there is provided a method for controlling a media-related application, the method comprising the steps of: determining whether a media-related application is to be executed; Controlling an output of a plurality of LEDs constituting the at least one operation key so as to indicate that the media related application is not executed and receiving an input to the at least one operation key Controlling the output of the plurality of LEDs to display at least one indicator for which the at least one operation key is set, wherein the set at least one indicator is distinguished from the volume control indicator Of the mobile terminal It provides a control method.

Effects of the mobile terminal and the control method according to the present invention will be described as follows.

According to at least one embodiment of the present invention, the functions of the operation keys can be displayed by controlling the output of a plurality of LEDs formed on the rear surface of the terminal.

Further, according to at least one of the embodiments of the present invention, there is an advantage that the display and function of the operation keys can be changed by operating the operation keys.

Further scope of applicability of the present invention will become apparent from the following detailed description. It should be understood, however, that the detailed description and specific examples, such as the preferred embodiments of the invention, are given by way of illustration only, since various changes and modifications within the spirit and scope of the invention will become apparent to those skilled in the art.

1A is a block diagram illustrating a mobile terminal according to the present invention.
1B and 1C are conceptual diagrams illustrating an example of a mobile terminal according to the present invention in different directions.
2A and 2B are views showing an embodiment of an operation key structure of a mobile terminal according to the present invention.
3 is a diagram for explaining a method of controlling an operation key of a mobile terminal according to the present invention.
4 to 5 are flowcharts for explaining a first embodiment of a control method of a mobile terminal according to the present invention.
6 to 8 are diagrams for explaining a first embodiment of a control method of a mobile terminal according to the present invention.
9 is a flowchart for explaining a second embodiment of a control method of a mobile terminal according to the present invention.
10 is a diagram for explaining a second embodiment of a control method of a mobile terminal according to the present invention.
11 is a flowchart for explaining a third embodiment of a control method of a mobile terminal according to the present invention.
12 to 13 are diagrams for explaining a third embodiment of a control method of a mobile terminal according to the present invention.
14 is a flowchart for explaining a fourth embodiment of a control method of a mobile terminal according to the present invention.
15 is a diagram for explaining a fourth embodiment of a control method of a mobile terminal according to the present invention.

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. It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory and are intended to provide further explanation of the invention as claimed. , ≪ / RTI > equivalents, and alternatives.

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 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 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, an ultrabook, a wearable device such as a smartwatch, a smart glass, and a head mounted display (HMD). have.

However, it will be appreciated by those skilled in the art that the configuration according to the embodiments described herein may be applied to fixed terminals such as a digital TV, a desktop computer, a digital signage, and the like, will be.

1A to 1C are block diagrams for explaining a mobile terminal according to the present invention, and FIGS. 1B and 1C are conceptual diagrams showing an example of a mobile terminal according to the present invention in different directions.

The mobile terminal 100 includes a wireless communication unit 110, an input unit 120, a sensing unit 140, an output unit 150, an interface unit 160, a memory 170, a control unit 180, and a power supply unit 190 ), And the like. The components shown in FIG. 1A are not essential for implementing a mobile terminal, so that the mobile terminal described herein may have more or fewer components than the components listed above.

The wireless communication unit 110 may be connected between the mobile terminal 100 and the wireless communication system or between the mobile terminal 100 and another mobile terminal 100 or between the mobile terminal 100 and the external server 100. [ Lt; RTI ID = 0.0 > wireless < / RTI > In addition, the wireless communication unit 110 may include one or more modules for connecting the mobile terminal 100 to one or more networks.

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 distance communication module 114, and a location information module 115 .

The input unit 120 includes a camera 121 or an image input unit for inputting a video signal, a microphone 122 for inputting an audio signal, an audio input unit, a user input unit 123 for receiving information from a user A touch key, a mechanical key, and the like). The voice data or image data collected by the input unit 120 may be analyzed and processed by a user's control command.

The sensing unit 140 may include at least one sensor for sensing at least one of information in the mobile terminal, surrounding environment information surrounding the mobile terminal, and user information. For example, the sensing unit 140 may include a proximity sensor 141, an illumination sensor 142, a touch sensor, an acceleration sensor, a magnetic sensor, A G-sensor, a gyroscope sensor, a motion sensor, an RGB sensor, an infrared sensor, a finger scan sensor, an ultrasonic sensor, A microphone 226, a battery gauge, an environmental sensor (for example, a barometer, a hygrometer, a thermometer, a radiation detection sensor, A thermal sensor, a gas sensor, etc.), a chemical sensor (e.g., an electronic nose, a healthcare sensor, a biometric sensor, etc.). Meanwhile, the mobile terminal disclosed in the present specification can combine and utilize information sensed by at least two of the sensors.

The output unit 150 includes at least one of a display unit 151, an acoustic output unit 152, a haptic tip module 153, and a light output unit 154 to generate an output related to visual, auditory, can do. The display unit 151 may have a mutual layer structure with the touch sensor or may be integrally formed to realize a touch screen. The touch screen may function as a user input unit 123 that provides an input interface between the mobile terminal 100 and a user and may provide an output interface between the mobile terminal 100 and a user.

The interface unit 160 serves as a path to various types of external devices connected to the mobile terminal 100. The interface unit 160 is connected to a device having a wired / wireless headset port, an external charger port, a wired / wireless data port, a memory card port, And may include at least one of a port, an audio I / O port, a video I / O port, and an earphone port. In the mobile terminal 100, corresponding to the connection of the external device to the interface unit 160, it is possible to perform appropriate control related to the connected external device.

In addition, the memory 170 stores data supporting various functions of the mobile terminal 100. The memory 170 may store a plurality of application programs or applications running on the mobile terminal 100, data for operation of the mobile terminal 100, and commands. At least some of these applications may be downloaded from an external server via wireless communication. Also, at least a part of these application programs may exist on the mobile terminal 100 from the time of shipment for the basic functions (e.g., telephone call receiving function, message receiving function, and calling function) of the mobile terminal 100. Meanwhile, the application program may be stored in the memory 170, installed on the mobile terminal 100, and may be operated by the control unit 180 to perform the operation (or function) of the mobile terminal.

In addition to the operations related to the application program, the control unit 180 typically controls the overall operation of the mobile terminal 100. The control unit 180 may process or process signals, data, information, and the like input or output through the above-mentioned components, or may drive an application program stored in the memory 170 to provide or process appropriate information or functions to the user.

In addition, the controller 180 may control at least some of the components illustrated in FIG. 1A in order to drive an application program stored in the memory 170. FIG. In addition, the controller 180 may operate at least two of the components included in the mobile terminal 100 in combination with each other for driving the application program.

The power supply unit 190 receives external power and internal power under the control of the controller 180 and supplies power to the components included in the mobile terminal 100. The power supply unit 190 includes a battery, which may be an internal battery or a replaceable battery.

At least some of the components may operate in cooperation with one another to implement a method of operation, control, or control of a mobile terminal according to various embodiments described below. In addition, the operation, control, or control method of the mobile terminal may be implemented on the mobile terminal by driving at least one application program stored in the memory 170. [

Hereinafter, the various components of the mobile terminal 100 will be described in detail with reference to FIG. 1A.

First, referring to the wireless communication unit 110, the broadcast receiving module 111 of the wireless communication unit 110 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 mobile communication module 112 may be a mobile communication module or a mobile communication module such as a mobile communication module or a mobile communication module that uses technology standards or a communication method (e.g., Global System for Mobile communication (GSM), Code Division Multi Access (CDMA), Code Division Multi Access 2000 (Enhanced Voice-Data Optimized or Enhanced Voice-Data Only), Wideband CDMA (WCDMA), High Speed Downlink Packet Access (HSDPA), High Speed Uplink Packet Access (HSUPA), Long Term Evolution And an external terminal, or a server on a mobile communication network established according to a long term evolution (AR), a long term evolution (AR), or the like.

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. The wireless Internet module 113 is configured to transmit and receive a wireless signal in a communication network according to wireless Internet technologies.

Wireless Internet technologies include, for example, wireless LAN (WLAN), wireless fidelity (Wi-Fi), wireless fidelity (Wi-Fi) Direct, DLNA (Digital Living Network Alliance), WiBro Interoperability for Microwave Access, High Speed Downlink Packet Access (HSDPA), High Speed Uplink Packet Access (HSUPA), Long Term Evolution (LTE) and Long Term Evolution-Advanced (LTE-A) 113 transmit and receive data according to at least one wireless Internet technology, including Internet technologies not listed above.

The wireless Internet module 113 for performing a wireless Internet connection through the mobile communication network can be used for wireless Internet access by WiBro, HSDPA, HSUPA, GSM, CDMA, WCDMA, LTE or LTE- May be understood as a kind of the mobile communication module 112.

The short-range communication module 114 is for short-range communication, and includes Bluetooth ™, Radio Frequency Identification (RFID), Infrared Data Association (IrDA), Ultra Wideband (UWB) (Near Field Communication), Wi-Fi (Wireless-Fidelity), Wi-Fi Direct, and Wireless USB (Wireless Universal Serial Bus) technology. The short-range communication module 114 is connected to the mobile terminal 100 and the wireless communication system through the wireless area networks, between the mobile terminal 100 and another mobile terminal 100, or between the mobile terminal 100 ) And the other mobile terminal 100 (or the external server). The short-range wireless communication network may be a short-range wireless personal area network.

Here, the other mobile terminal 100 may be a wearable device (e.g., a smartwatch, a smart glass, etc.) capable of interchanging data with the mobile terminal 100 according to the present invention (smart glass), HMD (head mounted display)). The short range communication module 114 may detect (or recognize) a wearable device capable of communicating with the mobile terminal 100 around the mobile terminal 100. [ If the detected wearable device is a device authenticated to communicate with the mobile terminal 100 according to the present invention, the control unit 180 may transmit at least a part of the data processed by the mobile terminal 100 to the short- 114 to the wearable device. Therefore, the user of the wearable device can use the data processed by the mobile terminal 100 through the wearable device. For example, according to this, when a telephone is received in the mobile terminal 100, the user performs a telephone conversation via the wearable device, or when a message is received in the mobile terminal 100, It is possible to check the message.

The position information module 115 is a module for obtaining the position (or current position) of the mobile terminal, and a representative example thereof is a Global Positioning System (GPS) module or a Wireless Fidelity (WiFi) module. For example, when the mobile terminal utilizes the GPS module, it can acquire the position of the mobile terminal by using a signal transmitted from the GPS satellite. As another example, when the mobile terminal utilizes the Wi-Fi module, it can acquire the position of the mobile terminal based on information of a wireless access point (AP) that transmits or receives the wireless signal with the Wi-Fi module. Optionally, the location information module 115 may perform any of the other functions of the wireless communication unit 110 to obtain data relating to the location of the mobile terminal, in addition or alternatively. The location information module 115 is a module used to obtain the location (or current location) of the mobile terminal, and is not limited to a module that directly calculates or obtains the location of the mobile terminal.

Next, the input unit 120 is for inputting image information (or signal), audio information (or signal), data, or information input from a user. For inputting image information, Or a plurality of cameras 121 may be provided. 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 may be displayed on the display unit 151 or stored in the memory 170. [ A plurality of cameras 121 provided in the mobile terminal 100 may be arranged to have a matrix structure and various angles or foci may be provided to the mobile terminal 100 through the camera 121 having the matrix structure A plurality of pieces of image information can be input. In addition, the plurality of cameras 121 may be arranged in a stereo structure to acquire a left image and a right image for realizing a stereoscopic image.

The microphone 122 processes the external acoustic signal into electrical voice data. The processed voice data can be utilized variously according to a function (or a running application program) being executed in the mobile terminal 100. Meanwhile, the microphone 122 may be implemented with various noise reduction algorithms for eliminating noise generated in receiving an external sound signal.

The user input unit 123 is for receiving information from a user and when the information is inputted through the user input unit 123, the control unit 180 can control the operation of the mobile terminal 100 to correspond to the input information . The user input unit 123 may include a mechanical input means (or a mechanical key such as a button located on the front, rear or side of the mobile terminal 100, a dome switch, a jog wheel, Jog switches, etc.) and touch-type input means. For example, the touch-type input means may comprise a virtual key, a soft key or a visual key displayed on the touch screen through software processing, And a touch key disposed on the touch panel. Meanwhile, the virtual key or the visual key can be displayed on a touch screen having various forms, for example, a graphic, a text, an icon, a video, As shown in FIG.

Meanwhile, the sensing unit 140 senses at least one of information in the mobile terminal, surrounding environment information surrounding the mobile terminal, and user information, and generates a corresponding sensing signal. The control unit 180 may control the driving or operation of the mobile terminal 100 or may perform data processing, function or operation related to the application program installed in the mobile terminal 100 based on the sensing signal. Representative sensors among various sensors that may be included in the sensing unit 140 will be described in more detail.

First, the proximity sensor 141 refers to a sensor that detects the presence of an object approaching a predetermined detection surface, or the presence of an object in the vicinity of the detection surface, without mechanical contact by using electromagnetic force or infrared rays. The proximity sensor 141 may be disposed in the inner area of the mobile terminal or in proximity to the touch screen, which is covered by the touch screen.

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. In the case where the touch screen is electrostatic, the proximity sensor 141 can be configured to detect the proximity of the object with a change of the electric field along the proximity of the object having conductivity. In this case, the touch screen (or touch sensor) itself may be classified as a proximity sensor.

On the other hand, for convenience of explanation, the act of recognizing that the object is located on the touch screen in proximity with no object touching the touch screen is referred to as "proximity touch & The act of actually touching an object on the screen is called a "contact touch. &Quot; The position at which the object is closely touched on the touch screen means a position where the object corresponds to the touch screen vertically when the object is touched. The proximity sensor 141 can detect 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, have. Meanwhile, the control unit 180 processes data (or information) corresponding to the proximity touch operation and the proximity touch pattern sensed through the proximity sensor 141 as described above, and further provides visual information corresponding to the processed data It can be output on the touch screen. Furthermore, the control unit 180 can control the mobile terminal 100 such that different operations or data (or information) are processed according to whether the touch to the same point on the touch screen is a proximity touch or a touch touch .

The touch sensor uses a touch (or touch input) applied to the touch screen (or the display unit 151) by using at least one of various touch methods such as a resistance film type, a capacitive type, an infrared type, an ultrasonic type, Detection.

For example, the touch sensor may be configured to convert a change in a pressure applied to a specific portion of the touch screen or a capacitance generated in a specific portion to an electrical input signal. The touch sensor may be configured to detect a position, an area, a pressure at the time of touch, a capacitance at the time of touch, and the like where a touch object touching the touch screen is touched on the touch sensor. 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.

Thus, when 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. Here, the touch controller may be a separate component from the control unit 180, and may be the control unit 180 itself.

On the other hand, the control unit 180 may perform different controls or perform the same control according to the type of the touch object touching the touch screen (or a touch key provided on the touch screen). Whether to perform different controls or to perform the same control according to the type of the touch object may be determined according to the current state of the mobile terminal 100 or an application program being executed.

On the other hand, the touch sensors and the proximity sensors discussed above can be used independently or in combination to provide a short touch (touch), a long touch, a multi touch, a drag touch ), Flick touch, pinch-in touch, pinch-out touch, swipe touch, hovering touch, and the like. Touch can be sensed.

The ultrasonic sensor can recognize the position information of the object to be sensed by using ultrasonic waves. Meanwhile, the controller 180 can calculate the position of the wave generating source through the information sensed by the optical sensor and the plurality of ultrasonic sensors. The position of the wave source can be calculated using the fact that the light is much faster than the ultrasonic wave, that is, the time when the light reaches the optical sensor is much faster than the time the ultrasonic wave reaches the ultrasonic sensor. More specifically, the position of the wave generating source can be calculated using the time difference with the time when the ultrasonic wave reaches the reference signal.

The camera 121 includes at least one of a camera sensor (for example, a CCD, a CMOS, etc.), a photo sensor (or an image sensor), and a laser sensor.

The camera 121 and the laser sensor may be combined with each other to sense a touch of the sensing object with respect to the three-dimensional stereoscopic image. The photosensor can be laminated to the display element, which is adapted to scan the movement of the object to be detected 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 change of light, and position information of the object to be sensed can be obtained through the calculation.

The display unit 151 displays (outputs) information processed by the mobile terminal 100. For example, the display unit 151 may display execution screen information of an application program driven by the mobile terminal 100 or UI (User Interface) and GUI (Graphic User Interface) information according to the execution screen information .

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

In the stereoscopic display unit, a three-dimensional display system such as a stereoscopic system (glasses system), an autostereoscopic system (no-glasses system), and a projection system (holographic system) can be applied.

The sound output unit 152 may output audio data received from the wireless communication unit 110 or stored in the memory 170 in a call signal reception mode, a call mode or a recording mode, a voice recognition mode, a broadcast reception mode, The sound output unit 152 also outputs sound signals related to functions (e.g., call signal reception sound, message reception sound, etc.) performed in the mobile terminal 100. [ The audio output unit 152 may include a receiver, a speaker, a buzzer, and the like.

The haptic module 153 generates various tactile effects that the user can feel. A typical example of the haptic effect generated by the haptic module 153 may be vibration. The intensity and pattern of the vibration generated in the haptic module 153 can be controlled by the user's selection or the setting of the control unit. For example, the haptic module 153 may synthesize and output different vibrations or sequentially output the vibrations.

In addition to vibration, the haptic module 153 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 suction force of the air through the injection port or the suction port, a touch on the skin surface, 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 153 can transmit the tactile effect through the direct contact, and the tactile effect can be felt by the user through the muscles of the finger or arm. The haptic module 153 may include two or more haptic modules 153 according to the configuration of the mobile terminal 100.

The light output unit 154 outputs a signal for notifying the occurrence of an event using the light of the light source of the mobile terminal 100. Examples of events that occur in the mobile terminal 100 may include message reception, call signal reception, missed call, alarm, schedule notification, email reception, information reception through an application, and the like.

The signal output from the light output unit 154 is implemented as the mobile terminal emits light of a single color or a plurality of colors to the front or rear surface. The signal output may be terminated by the mobile terminal detecting the event confirmation of the user.

The interface unit 160 serves as a path for communication with all external devices connected to the mobile terminal 100. The interface unit 160 receives data from an external device or supplies power to each component in the mobile terminal 100 or transmits data in the mobile terminal 100 to an 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 160.

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. Accordingly, the identification device can be connected to the terminal 100 through the interface unit 160. [

The interface unit 160 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 memory 170 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 170 may store data on vibration and sound of various patterns outputted when a touch is input on the touch screen.

The memory 170 may be a flash memory type, a hard disk type, a solid state disk type, an SDD type (Silicon Disk Drive type), a multimedia card micro type ), Card type memory (e.g., SD or XD memory), random access memory (RAM), static random access memory (SRAM), read-only memory (ROM), electrically erasable programmable read memory, a programmable read-only memory (PROM), a magnetic memory, a magnetic disk, and / or an optical disk. The mobile terminal 100 may operate in association with a web storage that performs the storage function of the memory 170 on the Internet.

Meanwhile, as described above, the control unit 180 controls the operations related to the application program and the general operation of the mobile terminal 100. [ For example, when the state of the mobile terminal meets a set condition, the control unit 180 can execute or release a lock state for restricting input of a user's control command to applications.

In addition, the control unit 180 performs control and processing related to voice communication, data communication, video call, or the like, or performs pattern recognition processing to recognize handwriting input or drawing input performed on the touch screen as characters and images, respectively . Further, the controller 180 may control any one or a plurality of the above-described components in order to implement various embodiments described below on the mobile terminal 100 according to the present invention.

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 includes a battery, 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.

In addition, the power supply unit 190 may include a connection port, and the connection port may be configured as an example of an interface 160 through which an external charger for supplying power for charging the battery is electrically connected.

As another example, the power supply unit 190 may be configured to charge the battery in a wireless manner without using the connection port. In this case, the power supply unit 190 may use at least one of an inductive coupling method based on a magnetic induction phenomenon from an external wireless power transmission apparatus and a magnetic resonance coupling method based on an electromagnetic resonance phenomenon Power can be delivered.

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

Referring to FIGS. 1B and 1C, 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 folder type, a flip type, a slide type, a swing type, and a swivel type in which a watch type, a clip type, a glass type or two or more bodies are relatively movably coupled . A description of a particular type of mobile terminal, although relevant to a particular type of mobile terminal, is generally applicable to other types of mobile terminals.

Here, the terminal body can be understood as a concept of referring to the mobile terminal 100 as at least one aggregate.

The mobile terminal 100 includes a case (for example, a frame, a housing, a cover, and the like) that forms an appearance. As shown, the mobile terminal 100 may include a front case 101 and a rear case 102. Various electronic components are disposed in the inner space formed by the combination of the front case 101 and the rear case 102. At least one middle case may be additionally disposed between the front case 101 and the rear case 102.

A display unit 151 is disposed on a front surface of the terminal body to output information. The window 151a of the display unit 151 may be mounted on the front case 101 to form a front surface of the terminal body together with the front case 101. [

In some cases, electronic components may also be mounted on the rear case 102. Electronic parts that can be mounted on the rear case 102 include detachable batteries, an identification module, a memory card, and the like. In this case, a rear cover 103 for covering the mounted electronic components can be detachably coupled to the rear case 102. Therefore, when the rear cover 103 is separated from the rear case 102, the electronic parts mounted on the rear case 102 are exposed to the outside.

As shown, when the rear cover 103 is coupled to the rear case 102, a side portion of the rear case 102 can be exposed. In some cases, the rear case 102 may be completely covered by the rear cover 103 during the engagement. Meanwhile, the rear cover 103 may be provided with an opening for exposing the camera 121b and the sound output unit 152b to the outside.

These cases 101, 102, and 103 may be formed by injection molding of synthetic resin or may be formed of metal such as stainless steel (STS), aluminum (Al), titanium (Ti), or the like.

The mobile terminal 100 may be configured such that one case provides the internal space, unlike the above example in which a plurality of cases provide an internal space for accommodating various electronic components. In this case, a unibody mobile terminal 100 in which synthetic resin or metal is connected from the side to the rear side can be realized.

Meanwhile, the mobile terminal 100 may include a waterproof unit (not shown) for preventing water from penetrating into the terminal body. For example, the waterproof portion is provided between the window 151a and the front case 101, between the front case 101 and the rear case 102, or between the rear case 102 and the rear cover 103, And a waterproof member for sealing the inside space of the oven.

The mobile terminal 100 is provided with a display unit 151, first and second sound output units 152a and 152b, a proximity sensor 141, an illuminance sensor 142, a light output unit 154, And may include cameras 121a and 121b, first and second operation units 123f and 123a and 123b, a power key P, a microphone 122, an interface unit 160, and the like.

1B and 1C, a display unit 151, a first sound output unit 152a, a proximity sensor 141, an illuminance sensor 142, an optical output unit (not shown) A first camera 121a and a first operation unit 123f are disposed on the rear side of the terminal body and a microphone 122 and an interface unit 160 are disposed on a side surface of the terminal body, 123a, and 123b, a second sound output unit 152b, and a second camera 121b.

However, these configurations are not limited to this arrangement. These configurations may be excluded or replaced as needed, or placed on different planes. For example, the first operation unit 123f may not be provided on the front surface of the terminal body, and the second sound output unit 152b may be provided on the side surface of the terminal body rather than the rear surface of the terminal body.

The display unit 151 displays (outputs) information processed by the mobile terminal 100. For example, the display unit 151 may display execution screen information of an application program driven by the mobile terminal 100 or UI (User Interface) and GUI (Graphic User Interface) information according to the execution screen information .

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.

In addition, the display unit 151 may exist in two or more depending on the embodiment of the mobile terminal 100. In this case, the mobile terminal 100 may be provided with a plurality of display portions spaced apart from each other or disposed integrally with one another, or may be disposed on different surfaces, respectively.

The display unit 151 may include a touch sensor that senses a touch with respect to the display unit 151 so that a control command can be received by a touch method. When a touch is made to the display unit 151, the touch sensor senses the touch, and the control unit 180 generates a control command corresponding to the touch based on the touch. 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.

The touch sensor may be a film having a touch pattern and disposed between the window 151a and a display (not shown) on the rear surface of the window 151a, or may be a metal wire . Alternatively, the touch sensor may be formed integrally with the display. For example, the touch sensor may be disposed on a substrate of the display or inside the display.

In this way, the display unit 151 can form a touch screen together with the touch sensor. In this case, the touch screen can function as a user input unit 123 (see FIG. 1A). In some cases, the touch screen can replace at least some functions of the first operation unit 123f.

The first sound output unit 152a may be implemented as a receiver for transmitting a call sound to a user's ear and the second sound output unit 152b may be implemented as a loud speaker for outputting various alarm sounds or multimedia playback sounds. ). ≪ / RTI >

The window 151a of the display unit 151 may be provided with an acoustic hole for emitting the sound generated from the first acoustic output unit 152a. However, the present invention is not limited to this, and the sound may be configured to be emitted along an assembly gap (for example, a gap between the window 151a and the front case 101) between the structures. In this case, the appearance of the mobile terminal 100 can be made more simple because the hole formed independently for the apparent acoustic output is hidden or hidden.

The optical output unit 154 is configured to output light for notifying the occurrence of an event. Examples of the event include a message reception, a call signal reception, a missed call, an alarm, a schedule notification, an email reception, and reception of information through an application. The control unit 180 may control the light output unit 154 to terminate the light output when the event confirmation of the user is detected.

The first camera 121a processes an image frame of a still image or a moving image obtained by the image sensor in the photographing mode or the video communication mode. The processed image frame can be displayed on the display unit 151 and can be stored in the memory 170. [

The first and second operation units 123f, 123a and 123b are examples of the user input unit 123 operated to receive a command for controlling the operation of the mobile terminal 100, . The first and second operation units 123f, 123a, and 123b can be employed in any tactile manner, such as touch, push, and scroll, in a tactile manner. In addition, the first and second operation units 123f, 123a, and 123b may be employed in such a manner that they are operated without a tactile feeling of the user through proximity touch, hovering touch, or the like.

In the figure, the first operation unit 123f is a touch key, but the present invention is not limited thereto. For example, the first operation unit 123f may be a mechanical key, or a combination of a touch key and a touch key.

Contents input by the first and second operation units 123f, 123a, and 123b may be variously set. For example, the first operation unit 123f receives commands such as a menu, a home key, a cancellation, a search, etc., and the second operation units 123a and 123b receive commands from the first or second sound output units 152a and 152b The size of the sound to be output, the switch to the touch recognition mode of the display unit 151, and the like.

On the other hand, a back input unit (a second operation unit 123a or 123b) may be provided on the rear surface of the terminal body as another example of the user input unit 123. [ The second operation units 123a and 123b are operated to receive a command for controlling the operation of the mobile terminal 100, and input contents can be variously set. For example, commands such as power on / off, start, end, scrolling, and the like, the size adjustment of the sound output from the first and second sound output units 152a and 152b, And the like can be inputted. The second operation units 123a and 123b may be implemented as a touch input, a push input, or a combination thereof, and may include a plurality of LEDs (Light Emitting Diodes) Can be displayed.

The second operation unit 123a or 123b may be formed under the second camera 121b of the terminal rear cover 103 and may be provided at least on the power key P in the upper, Can be formed on one side. The second operation units 123a and 123b may be disposed at the rear upper end portion of the terminal body so that the second operation units 123a and 123b can be easily operated using the detection when the user holds the terminal body with one hand. However, the present invention is not limited thereto, and the position of the rear input unit may be changed.

When a rear input unit is provided on the rear surface of the terminal body, a new type of user interface using the rear input unit can be realized. In the case where the first operation unit 123f is not disposed on the front surface of the terminal body in place of at least a part of the functions of the first operation unit 123f provided on the front surface of the terminal body, The display unit 151 may be configured to have a larger screen.

Meanwhile, the mobile terminal 100 may be provided with a fingerprint recognition sensor for recognizing the fingerprint of the user, and the controller 180 may use the fingerprint information sensed through the fingerprint recognition sensor as authentication means. The fingerprint recognition sensor may be embedded in the display unit 151 or the user input unit 123.

The microphone 122 is configured to receive the user's voice, other sounds, and the like. The microphone 122 may be provided at a plurality of locations to receive stereophonic sound.

The interface unit 160 is a path through which the mobile terminal 100 can be connected to an external device. For example, the interface unit 160 may include a connection terminal for connection with another device (for example, an earphone or an external speaker), a port for short-range communication (for example, an infrared port (IrDA Port), a Bluetooth port A wireless LAN port, or the like), or a power supply terminal for supplying power to the mobile terminal 100. The interface unit 160 may be implemented as a socket for receiving an external card such as a SIM (Subscriber Identification Module) or a UIM (User Identity Module) or a memory card for storing information.

And a second camera 121b may be disposed on a rear surface of the terminal body. In this case, the second camera 121b has a photographing direction which is substantially opposite to that of the first camera 121a.

The second camera 121b may include a plurality of lenses arranged along at least one line. The plurality of lenses may be arranged in a matrix form. Such a camera can be named an 'array camera'. When the second camera 121b is configured as an array camera, images can be taken in various ways using a plurality of lenses, and a better quality image can be obtained.

The flash 124 may be disposed adjacent to the second camera 121b. The flash 124 shines light toward the subject when the subject is photographed by the second camera 121b.

And a second sound output unit 152b may be additionally disposed in the terminal body. The second sound output unit 152b may implement a stereo function together with the first sound output unit 152a and may be used for implementing a speakerphone mode in a call.

The terminal body may be provided with at least one antenna for wireless communication. The antenna may be embedded in the terminal body or formed in the case. For example, an antenna constituting a part of the broadcast receiving module 111 (see FIG. 1A) may be configured to be able to be drawn out from the terminal body. Alternatively, the antenna may be formed in a film type and attached to the inner surface of the rear cover 103, or a case including a conductive material may be configured to function as an antenna.

The terminal body is provided with a power supply unit 190 (see FIG. 1A) for supplying power to the mobile terminal 100. The power supply unit 190 may include a battery 191 built in the terminal body or detachable from the outside of the terminal body.

The battery 191 may be configured to receive power through a power cable connected to the interface unit 160. In addition, the battery 191 may be configured to be wirelessly chargeable through a wireless charger. The wireless charging may be implemented by a magnetic induction method or a resonance method (magnetic resonance method).

The rear cover 103 is configured to be coupled to the rear case 102 so as to cover the battery 191 to restrict the release of the battery 191 and to protect the battery 191 from external impact and foreign matter . When the battery 191 is detachably attached to the terminal body, the rear cover 103 may be detachably coupled to the rear case 102.

The mobile terminal 100 may be provided with an accessory that protects the appearance or supports or expands the function of the mobile terminal 100. [ One example of such an accessory is a cover or pouch that covers or accommodates at least one side of the mobile terminal 100. [ The cover or pouch may be configured to interlock with the display unit 151 to expand the function of the mobile terminal 100. Another example of an accessory is a touch pen for supplementing or extending a touch input to the touch screen.

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

FIG. 2A and FIG. 2B are views showing an embodiment of an operation key structure of a mobile terminal according to the present invention, and FIG. 3 is a view for explaining a control method of an operation key of the mobile terminal according to the present invention.

2A and 2B, the operation keys 123a, 123b, 123c and 123d of the mobile terminal are formed on the rear cover 103 of the terminal or formed in the body of the terminal and formed in the opening formed in the rear cover 103 Can be exposed to the outside.

Each of the operation keys 123a, 123b, 123c and 123d may be formed symmetrically with respect to the power key P formed at the upper center of the rear cover 103 of the terminal, As shown in FIG.

The operation keys 123a, 123b, 123c, and 123d are formed on the upper side of the rear cover so as to allow the user to touch the index finger while holding the back side of the terminal, and may include a plurality of LEDs. Also, the operation keys 123a, 123b, 123c, and 123d may include a transparent touch sensor capable of sensing a touch input on a plurality of LEDs, or may have a physical structure capable of sensing pressure. Therefore, the operation keys 123a, 123b, 123c, and 123d can function as a display unit that displays a specific indicator by controlling output of a plurality of LEDs, and can function as an input unit that receives a touch input or receives an operation input .

Referring to FIG. 3, the controller 180 of the mobile terminal can control the output of a plurality of LEDs to display an indicator corresponding to various menu functions. Here, the indicator of the form corresponding to the various menu functions may be a specific character, an icon shape, a control key shape, and the like.

Specifically, in order to display an indicator of an up / down arrow shape indicating the volume up / down, the control unit controls the LEDs corresponding to the arrow shapes to turn on and off the other LEDs (Fig. 3 (a)).

The control unit lights an LED corresponding to each shape to display an indicator (e.g., a camera shape indicator, a note shape indicator, a specific character shape indicator, or the like) indicative of an icon or a representative character of a specific application, A plurality of LEDs can be controlled so as to turn off the other LEDs (Fig. 3 (b) to (d)).

4 to 5 are flowcharts for explaining a first embodiment of a control method of a mobile terminal according to the present invention, and FIGS. 6 to 8 illustrate a first embodiment of a control method of a mobile terminal according to the present invention Respectively.

Referring to FIG. 4, the controller 180 of the mobile terminal may control output of a plurality of LEDs to display a volume control indicator on at least one operation key when executing a media related application (S110) (S120) .

The control unit may control the output of a plurality of LEDs to display a volume control indicator on an operation key formed on a back cover of the terminal when reproducing media such as music, moving pictures, and DMB using a media playback application. Specifically, the control unit can display the upper and lower arrow shape indicators by controlling the lighting of each LED.

If the controller 180 receives an input for at least one operation key (S130), the controller 180 may adjust the volume (S140).

Specifically, when the indicator of the upper arrow shape receives the input to the operation key displayed, the control unit may control the output so as to gradually increase the reproduction volume of the media according to the number of times of input. In addition, when the indicator of the lower arrow shape receives the input to the displayed operation key, the control unit may control the output to gradually decrease the reproduction volume of the media according to the number of times of input. At this time, the control unit can display the size of the output volume directly or by setting the maximum volume or the minimum volume. When the media is reproduced at the maximum volume, the control unit can not increase the volume even if the input to the operation keys indicating the shape of the upper arrow continues to be received. On the other hand, when the media is reproduced with the minimum volume, the control unit can erase the media playback sound by continuously receiving the input to the operation keys indicating the shape of the lower arrow.

5, if the execution of the media related application is stopped or terminated (S150) after the volume control indicator is displayed on at least one operation key, the control unit 180 of the mobile terminal determines whether volume control of at least one operation key The display of the indicator can be released (S160).

Specifically, when the media playback is stopped or terminated, the controller may turn off the display of the volume control indicator by turning off the LEDs.

In addition, the control unit may display the volume control indicator in at least one operation key when the media-related application is executed, and may release the display of the volume control indicator if no input is received during the set time. That is, the control unit can extinguish all of the plurality of LEDs.

Hereinafter, a method of displaying and releasing the volume control indicator in the mobile terminal according to the first embodiment will be described in detail with reference to FIGS. 6 to 8. FIG.

Referring to FIG. 6, the controller 180 of the mobile terminal may display up and down arrow indicators on the operation keys 123a and 123b of the back cover 103 when the media related application is executed.

Specifically, when the music reproduction application is executed and the music is reproduced, the control unit can control the output of a plurality of LEDs so that the upper or lower arrow indicator is displayed on the operation keys 123a and 123b. That is, the LEDs at the positions corresponding to the upper arrow shape or the lower arrow shape are turned on, and the other LEDs are turned off to display the arrow shape indicator.

When receiving a specific input for volume control through the display unit 151 after executing the music playback application, the control unit may display an up and down arrow indicator on the operation keys 123a and 123b of the rear cover.

7, when the control unit 180 of the mobile terminal receives an input to the first operation key 123a among the operation keys 123a and 123b of the rear cover 103, the first operation key 123a, And can perform a function corresponding to the specific indicator shown in FIG.

The operation key may include a touch sensor that senses a touch input or may include a pressure sensor capable of sensing a pressure change. When the touch input or the pressure input to the operation key is received, Can be recognized as an input.

The controller may execute a volume increase function corresponding to the indicator of the upper arrow shape when receiving the touch input or the operation input to the first operation key 123a on which the upper arrow shape indicator is displayed. Accordingly, the control unit can increase the volume of the media being played back, and display the result of the performance on the display unit 151 as a pop-up window W. [

Referring to FIG. 8, the controller 180 of the mobile terminal can cancel the display of the specific indicator when stopping the media playback or terminating the media-related application.

When receiving the input (I) requesting the stop of the music reproduction, the control section can turn off the display of the specific indicator by turning off the plurality of LEDs of the rear cover 103. In this case, the user may only identify the power key P to the rear cover 103 and not identify the operation key.

FIG. 9 is a flowchart for explaining a second embodiment of a control method for a mobile terminal according to the present invention, and FIG. 10 is a diagram for explaining a second embodiment of a control method for a mobile terminal according to the present invention.

Referring to FIG. 9, the controller 180 of the mobile terminal can determine whether the object is close to the illuminance sensor and the proximity sensor using sensing information sensed through the illuminance sensor and the proximity sensor (S160). Here, the control unit may determine that the object is close to the proximity sensor when the object approaches the illuminance sensor and the proximity sensor.

The controller can determine that the object is close to the proximity sensor and the illuminance sensor when the illuminance value sensed through the illuminance sensor is less than or equal to the first reference value and the distance from the object sensed through the proximity sensor is less than or equal to the second reference value. Specifically, the control unit can detect a state in which the illuminance sensor and the proximity sensor formed on the same surface as the display unit are obstructed by other objects, that is, a state in which the display unit is obscured, depending on whether the object, the illuminance sensor, and the proximity sensor are close to each other.

The control unit 180 may change the display of the at least one operation key when the object is close to the illuminance sensor and the proximity sensor and receives an input to the power key (S170) (S180).

When the object is close to the illuminance sensor and the proximity sensor while the volume control indicator is displayed, the control unit can display the volume control indicator by changing the indicator to another shape indicator when receiving the input to the power key. That is, when the display unit is hidden by other objects, the user can not confirm whether or not the media is played back. In this case, different functions can be set to the operation keys, and an indicator of the shape corresponding to the other functions can be displayed on the operation keys have. For example, the control unit may display an indicator of the shape indicating the function of releasing the indication of the volume adjustment indicator and stopping the media reproduction.

Further, even when the object is close to the illuminance sensor and the proximity sensor and the input to the power key is received in a state in which the specific indicator is not displayed on the operation key, the control unit may set the indicator of the shape corresponding to the other function to the operation key Can be displayed.

Hereinafter, with reference to FIG. 10, a method for changing the display of the operation keys in the mobile terminal according to the second embodiment will be described in detail.

10, when the mobile terminal receives the input I1 for the power key P in a state that the back cover of the terminal is facing upward, the control unit 180 of the mobile terminal displays the operation keys 123a, and 123b, and controls the outputs of the plurality of LEDs to display other indicators.

Specifically, when the mobile terminal is placed on the object such that the rear cover of the terminal faces upward, the controller can determine that the object and the proximity sensor / illuminance sensor are close to each other. The control unit displays a first indicator indicating a media skip to the first operation key 123a when the object and the proximity sensor / illuminance sensor are close to each other and receives the input I1 to the power key P, And to display a second indicator indicating the media reproduction stop in the operation key 123b.

When the second indicator receives an input to the second operation key 123b displayed, the control unit can execute a media playback stop function, which is a function corresponding to the second indicator. In addition, when the media reproduction is stopped, the control section can release the display of the first operation key 123a and display the third indicator indicating the media reproduction in the second operation key 123b. That is, the control unit may control the outputs of the plurality of LEDs to change and display the specific indicators displayed on the at least one operation keys 123a and 123b, according to the inputs to the at least one operation keys 123a and 123b.

FIG. 11 is a flowchart for explaining a third embodiment of a control method of a mobile terminal according to the present invention, and FIGS. 12 to 13 are views for explaining a third embodiment of a control method of a mobile terminal according to the present invention .

11, when the control unit 180 of the mobile terminal receives an input for at least one operation key in a state where the media related application is not executed (S210), the controller 180 of the mobile terminal displays the at least one indicator (S220).

Specifically, when the media-related application is not executed, the control unit may not display the specific indicator in the operation key. When the control unit receives an input for at least one operation key in a state in which the media-related application is not executed, the control unit may display at least one indicator set on the operation key receiving the input to each operation key.

The control unit may set different indicators to at least one operation key according to the position and the number of inputs of the at least one operation key. Specifically, when a plurality of operation keys are provided, the control unit may set different indicators to the plurality of operation keys according to whether the operation keys received the input are the first operation keys or the second operation keys. At this time, the control unit may set the indicator only for a part of the plurality of operation keys, and may not set the indicator for the remaining operation keys. In addition, the control unit may be configured to display different indicators on the plurality of operation keys in accordance with the number of inputs to the operation keys. For example, when the mobile terminal receives one input of the first operation key among the two operation keys on the mobile terminal, the controller displays a camera-shaped indicator on the first operation key, Can be displayed. In addition, when the mobile terminal receives the second input of the first operation key among the two operation keys, the controller displays the indicator of the gallery icon shape in the first operation key, and the indicator of the shape of the memo application icon Indicators can be displayed.

Hereinafter, with reference to FIGS. 12 to 13, a method of displaying an indicator on an operation key in the mobile terminal according to the third embodiment will be described.

Referring to FIG. 12, when the control unit 180 of the mobile terminal receives the input I1 for at least one operation key, it may display the set indicator.

Specifically, when receiving the input (I1) for the second operation key 123b area in the state where the indicator is not displayed on at least one operation key, the control unit switches the character Q shape indicator to the first operation key 123a , And the indicator of the camera shape can be displayed on the second operation key 123b. That is, when receiving the input I1 for the second operation key 123b area in a state where the indicator is not displayed on the operation key, the control unit executes the execution of the quick memo (Q) application to the first operation key 123a Function can be set, and the execution function of the camera application can be set to the second operation key 123b.

When receiving the input (I2) for the first operation key (123a) in the state that the indicator is not displayed on the at least one operation key, the control unit sets the indicator of the note shape to the first operation key And a microphone-shaped indicator can be displayed on the second operation key 123b. That is, when receiving the input (I2) for the first operation key 123a in the state where the indicator is not displayed on the operation key, the control unit sets the execution function of the music reproduction application to the first operation key 123a And the execution function of the voice recording application can be set in the second operation key 123b.

Referring to FIG. 13, when the controller 180 of the mobile terminal receives an input to the second operation key 123b having an indicator of a camera shape, the controller 180 executes a camera application to display a preview screen on the display unit 151 can do.

When a specific function is set for at least one operation key, the control unit can display an indicator indicating a specific function using the LED of the operation key, and when the specific indicator receives an input for the operation key displayed, It can be judged as a request to execute the function. Therefore, the control unit can execute the function corresponding to the specific indicator.

If the controller receives an input to the first operation key 123a for which the indicator is not displayed and if the camera shape indicator has received an input for the second operation key 123b displayed without performing any function, The camera application executing function corresponding to the indicator of the camera shape can be executed.

FIG. 14 is a flowchart for explaining a fourth embodiment of a control method of a mobile terminal according to the present invention, and FIG. 15 is a diagram for explaining a fourth embodiment of a control method of a mobile terminal according to the present invention.

Referring to FIG. 14, when the controller 180 of the mobile terminal displays the indicator on at least one of the operation keys, if it is determined that the distance between the object and the proximity sensor / illuminance sensor is close (S230) An indicator related to the sound output among the plurality of indicators may be filtered (S240). Here, the control unit may determine that the object is close to the proximity sensor when the object approaches the illuminance sensor and the proximity sensor.

The controller can determine that the object is close to the proximity sensor and the illuminance sensor when the illuminance value sensed through the illuminance sensor is less than or equal to the first reference value and the distance from the object sensed through the proximity sensor is less than or equal to the second reference value. Specifically, the control unit can detect a state in which the illuminance sensor and the proximity sensor formed on the same surface as the display unit are obstructed by other objects, that is, a state in which the display unit is obscured, depending on whether the object, the illuminance sensor, and the proximity sensor are close to each other.

That is, the control unit determines that the screen displayed on the display unit can not be confirmed, so that only the function related to the sound output can be set to at least one operation key.

The control unit 180 may display a specific indicator on the first operation key and display the filtered indicator on the second operation key (S250).

When receiving the input to the first operation key, the control unit can change the indicator displayed on the second operation key, and when receiving the input to the second operation key, perform the function corresponding to the displayed indicator.

Hereinafter, with reference to FIG. 15, a method of displaying and changing an indicator on an operation key in the mobile terminal according to the fourth embodiment of the present invention will be described.

15, when the proximity sensor / illuminance sensor is in proximity to an object and receives a first input (not shown) for the second operation key 123b, the control unit 180 of the mobile terminal changes to the next menu The first indicator corresponding to the function to be displayed on the second operation key 123b.

Next, when the first indicator receives the second input I1 for the second operation key 123b indicated by the first indicator, the controller may display the indicator of the note detection to the first operation key 123a. In addition, when the first indicator receives the third input I2 for the second operation key 123b displayed, the controller may display a microphone-shaped indicator on the first operation key 123a. In addition, when the first indicator receives the fourth input (I3) for the second operation key 123b displayed, the controller can display the FM character shape indicator on the first operation key 123a.

When the proximity sensor / illuminance sensor receives a first input (not shown) for the second operation key 123b in a state where the proximity sensor / illuminance sensor is in proximity to the object, the control unit 180 of the mobile terminal transmits the first And can perform filtering of an indicator related to the sound output to be displayed on the first operation key 123a.

As the first indicator receives the input to the second operation key 123b displayed, the controller can sequentially display the indicator associated with the filtered sound output to the first operation key 123a.

Although not shown, the controller may perform a function corresponding to a specific indicator when a specific indicator associated with the sound output is touched with the displayed first operation key 123a.

According to the present invention, a specific function is set to an operation key composed of a plurality of LEDs formed on a rear cover of a mobile terminal, and an indicator indicating a set function is displayed by controlling the outputs of a plurality of LEDs, It is possible to operate the functions of the terminal intuitively.

The present invention described above can be embodied as computer-readable codes on a medium on which a program is recorded. The computer readable medium includes all kinds of recording devices in which data that can be read by a computer system is stored. Examples of the computer readable medium include a hard disk drive (HDD), a solid state disk (SSD), a silicon disk drive (SDD), a ROM, a RAM, a CD-ROM, a magnetic tape, a floppy disk, , And may also be implemented in the form of a carrier wave (e.g., transmission over the Internet). Also, the computer may include a control unit 180 of the terminal. Accordingly, the above description should not be construed in a limiting sense in all respects and should be considered illustrative. The scope of the present invention should be determined by rational interpretation of the appended claims, and all changes within the scope of equivalents of the present invention are included in the scope of the present invention.

100: mobile terminal 110: wireless communication unit
120: Input unit
140: sensing unit 150: output unit
160: interface unit 170: memory
180: control unit 190: power supply unit

Claims (13)

At least one operation key disposed on the rear surface of the terminal body and having a plurality of LEDs (Light Emitting Diodes), displaying a specific indicator by controlling output of the plurality of LEDs, and receiving a user's input; And
A control unit for controlling the output of the plurality of LEDs so that the at least one operation key displays a volume control indicator when the media related application is executed;
. The method according to claim 1,
Wherein the control unit controls the output of the plurality of LEDs to cancel the display of the volume control indicator of the at least one operation key when the execution of the media related application is stopped for a predetermined time or the execution of the media related application is terminated And controlling the mobile terminal. The method according to claim 1,
An illuminance sensor, a proximity sensor; And
And a power key disposed on a rear surface of the terminal body,
Wherein the control unit determines that the distance between the illuminance sensor, the proximity sensor, and the object is close to a predetermined distance or less by using the sensing information sensed through the illuminance sensor and the proximity sensor, Wherein the control unit controls the output of the plurality of LEDs so as to display and change the volume control indicator of the at least one operation key to another set indicator. The method according to claim 1,
Wherein the at least one operation key is disposed at a position symmetrical with respect to the power key. The method according to claim 1,
Wherein the controller is configured to control the display of at least one of the plurality of LEDs to display at least one indicator set by the at least one operation key when receiving the input for the at least one operation key in a state in which the media- To the mobile terminal. 6. The method of claim 5,
Wherein the control unit changes and displays the set at least one indicator according to at least one of an input position or a number of inputs to the at least one operation key. 6. The method of claim 5,
An illuminance sensor, and a proximity sensor,
Wherein the control unit determines that the distance between the illuminance sensor, the proximity sensor and the object is close to a predetermined distance or less by using the sensing information sensed through the illuminance sensor and the proximity sensor, The method comprising the steps of: filtering an indicator related to an acoustic output of the set at least one indicator; displaying a specific indicator in a first operation key of the at least one operation key; And controls the outputs of the plurality of LEDs so as to display the indicators. The method according to claim 1,
Wherein the control unit executes a function corresponding to the displayed indicator when receiving an input to the at least one operation key in a state that the indicator is displayed on the at least one operation key. The method according to claim 1,
Wherein the control unit controls the output of the plurality of LEDs to display different indicators on the at least one operation key. Determining whether the media related application is executed;
Controlling the output of the plurality of LEDs constituting the at least one operation key so that at least one operation key formed on the rear surface of the terminal displays a volume control indicator when it is determined that the media related application is to be executed ; And
Wherein if the media related application is determined not to be executed and the input for the at least one operation key is received as a result of the determination, output of the plurality of LEDs to display the at least one indicator set by the at least one operation key ;
, ≪ / RTI &
Wherein the at least one set indicator is distinguishable from the volume control indicator. 11. The method of claim 10,
Controlling an output of the plurality of LEDs to cancel the display of the volume control indicator of the at least one operation key when the execution of the media related application is stopped for a predetermined time or the execution of the media related application is terminated;
The method of claim 1, further comprising: 11. The method of claim 10,
And controlling the plurality of LED outputs to display at least one indicator for which the at least one operation key is set,
When the distance between the illuminance sensor and the proximity sensor and the object approaches a predetermined distance or less by using the sensing information sensed through the illuminance sensor and the proximity sensor, an indicator related to the sound output of the set at least one indicator ; And
Controlling an output of the plurality of LEDs to display the filtered indicator on a first operation key of the at least one operation key and display an indicator for changing the filtered indicator on a second operation key;
And a controller for controlling the mobile terminal. 11. The method of claim 10,
Receiving an input for the at least one operation key with an indicator displayed on the at least one operation key; And
Executing a function corresponding to the indicator receiving the input;
The method of claim 1, further comprising:

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