Patent Publication Number: US-2011050602-A1

Title: Mobile terminal and controlling method thereof

Description:
Pursuant to 35 U.S.C. §119(a), this application claims the benefit of earlier filing date and right of priority to Korean Application No. 10-2009-0079151, filed on Aug. 26, 2009, the contents of which are hereby incorporated by reference herein in their entirety. 
     BACKGROUND OF THE INVENTION 
     1. Field of the Invention 
     The present invention relates to a mobile terminal, and more particularly, to a mobile terminal and controlling method thereof. Although the present invention is suitable for a wide scope of applications, it is particularly suitable for implementing a terminal to be used in further consideration of user&#39;s convenience. 
     2. Discussion of the Related Art 
     A mobile terminal is a device which may be configured to perform various functions. Examples of such functions include data and voice communications, capturing images and video via a camera, recording audio, playing music files and outputting music via a speaker system, and displaying images and video on a display. Some terminals include additional functionality which supports game playing, while other terminals are also configured as multimedia players. More recently, mobile terminals have been configured to receive broadcast and multicast signals which permit viewing of contents, such as videos and television programs. 
     Generally, terminals can be classified into mobile terminals and stationary terminals according to a presence or non-presence of mobility. And, the mobile terminals can be further classified into handheld terminals and vehicle mount terminals according to availability for hand-carry. 
     There are ongoing efforts to support and increase the functionality of mobile terminals. Such efforts include software and hardware improvements, as well as changes and improvements in the structural components which form the mobile terminal. 
     Recently, touchscreen type mobile terminals tend to be globally introduced. This touchscreen type mobile terminal enters a locked state to prevent an incorrect touch from being inputted by a terminal user if a user input is not performed for predetermined duration. When the mobile terminal is in the locked state, a method of facilitating a terminal user to conveniently use a specific function is necessary. And, the demand for this method keeps rising. 
     SUMMARY OF THE INVENTION 
     Accordingly, the present invention is directed to a mobile terminal and controlling method thereof that substantially obviate one or more problems due to limitations and disadvantages of the related art. 
     An object of the present invention is to provide a mobile terminal and controlling method thereof, by which a terminal user is facilitated to use a specific function of a mobile terminal in a locked state to prevent an incorrect touch input to a touchscreen provided to the mobile terminal. 
     Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention. The objectives and other advantages of the invention may be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings. 
     To achieve these objects and other advantages and in accordance with the purpose of the invention, as embodied and broadly described herein, a mobile terminal according to the present invention includes a touchscreen, and a control unit configured to display a standby image on the touchscreen by image blurring when the mobile terminal is in a locked state, to release the locked state when a prescribed touch gesture is performed on the touchscreen, and to display the standby image by image deblurring when the lock state is released. 
     In another aspect of the present invention, a method of controlling a mobile terminal includes entering a terminal locked state, displaying a standby image on a touchscreen by image blurring, releasing the locked state if a prescribed touch gesture is performed on the touchscreen, and displaying the standby image by image deblurring. 
     It is to be understood that both the foregoing general description and the following detailed description of the present invention are exemplary and explanatory and are intended to provide further explanation of the invention as claimed. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the principle of the invention. In the drawings: 
         FIG. 1  is a block diagram of a mobile terminal according to one embodiment of the present invention; 
         FIG. 2A  is a front perspective diagram of a mobile terminal according to one embodiment of the present invention; 
         FIG. 2B  is a rear perspective diagram of a mobile terminal according to one embodiment of the present invention; 
         FIG. 3  is a flowchart for a method of controlling a mobile terminal according to an embodiment of the present invention; and 
         FIGS. 4 to 9  are diagrams for display screens on which a method of controlling a mobile terminal according to an embodiment of the present invention is implemented. 
     
    
    
     DETAILED DESCRIPTION OF THE INVENTION 
     Reference will now be made in detail to the preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings. It is to be understood by those of ordinary skill in this technological field that other embodiments may be utilized, and structural, electrical, as well as procedural changes may be made without departing from the scope of the present invention. Wherever possible, the same reference numbers will be used throughout the drawings to refer to the same or like parts. As used herein, the suffixes ‘module’, ‘unit’ and ‘part’ are used for elements in order to facilitate the disclosure only. Therefore, significant meanings or roles are not given to the suffixes themselves and it is understood that the ‘module’, ‘unit’ and ‘part’ can be used together or interchangeably. 
     The present invention can be applicable to a various types of terminals. Examples of such terminals include mobile as well as stationary terminals, such as mobile phones, user equipment, smart phones, DTV, computers, digital broadcast terminals, personal digital assistants, portable multimedia players (PMP) and navigators. 
     However, by way of non-limiting example only, further description will be with regard to a mobile terminal  100 , and it should be noted that such teachings may apply equally to other types of terminals. 
       FIG. 1  is a block diagram of a mobile terminal  100  in accordance with an embodiment of the present invention.  FIG. 1  shows the mobile terminal  100  according to one embodiment of the present invention includes a wireless communication unit  110 , an A/V (audio/video) input unit  120 , a user input unit  130 , a sensing unit  140 , an output unit  150 , a memory  160 , an interface unit  170 , a controller  180 , a power supply unit  190  and the like.  FIG. 1  shows the mobile terminal  100  having various components, but it is understood that implementing all of the illustrated components is not a requirement. Greater or fewer components may alternatively be implemented. 
     In the following description, the above elements of the mobile terminal  100  are explained in sequence. 
     First of all, the wireless communication unit  110  typically includes one or more components which permits wireless communication between the mobile terminal  100  and a wireless communication system or network within which the mobile terminal  100  is located. For instance, the wireless communication unit  110  can include a broadcast receiving module  111 , a mobile communication module  112 , a wireless internet module  113 , a short-range communication module  114 , a position-location module  115  and the like. 
     The broadcast receiving module  111  receives a broadcast signal and/or broadcast associated information from an external broadcast managing server via a broadcast channel. 
     The broadcast channel may include a satellite channel and a terrestrial channel. 
     The broadcast managing server generally refers to a server which generates and transmits a broadcast signal and/or broadcast associated information or a server which is provided with a previously generated broadcast signal and/or broadcast associated information and then transmits the provided signal or information to a terminal. The broadcast signal may be implemented as a TV broadcast signal, a radio broadcast signal, and a data broadcast signal, among others. If desired, the broadcast signal may further include a broadcast signal combined with a TV or radio broadcast signal. 
     At least two broadcast receiving modules  111  can be provided to the mobile terminal  100  in pursuit of simultaneous receptions of at least two broadcast channels or broadcast channel switching facilitation. 
     The broadcast associated information includes information associated with a broadcast channel, a broadcast program, a broadcast service provider, etc. And, the broadcast associated information can be provided via a mobile communication network. In this case, the broadcast associated information can be received by the mobile communication module  112 . 
     The broadcast associated information can be implemented in various forms. For instance, broadcast associated information may include an electronic program guide (EPG) of digital multimedia broadcasting (DMB) and electronic service guide (ESG) of digital video broadcast-handheld (DVB-H). 
     The broadcast receiving module  111  may be configured to receive broadcast signals transmitted from various types of broadcast systems. By nonlimiting example, such broadcasting systems include digital multimedia broadcasting-terrestrial (DMB-T), digital multimedia broadcasting-satellite (DMB-S), digital video broadcast-handheld (DVB-H), DVB-CBMS, OMA-BCAST, the data broadcasting system known as media forward link only (MediaFLO®) and integrated services digital broadcast-terrestrial (ISDB-T). Optionally, the broadcast receiving module  111  can be configured suitable for other broadcasting systems as well as the above-explained digital broadcasting systems. 
     The broadcast signal and/or broadcast associated information received by the broadcast receiving module  111  may be stored in a suitable device, such as a memory  160 . 
     The mobile communication module  112  transmits/receives wireless signals to/from one or more network entities (e.g., base station, external terminal, server, etc.). Such wireless signals may represent audio, video, and data according to text/multimedia message transceivings, among others. 
     The wireless internet module  113  supports Internet access for the mobile terminal  100 . This module may be internally or externally coupled to the mobile terminal  100 . In this case, the wireless Internet technology can include WLAN (Wireless LAN) (Wi-Fi), Wibro (Wireless broadband), Wimax (World Interoperability for Microwave Access), HSDPA (High Speed Downlink Packet Access), etc. 
     The short-range communication module  114  facilitates relatively short-range communications. Suitable technologies for implementing this module include radio frequency identification (RFID), infrared data association (IrDA), ultra-wideband (UWB), as well at the networking technologies commonly referred to as Bluetooth and ZigBee, to name a few. 
     The position-location module  115  identifies or otherwise obtains the location of the mobile terminal  100 . If desired, this module may be implemented with a global positioning system (GPS) module. 
     Referring to  FIG. 1 , the audio/video (A/V) input unit  120  is configured to provide audio or video signal input to the mobile terminal  100 . As shown, the A/V input unit  120  includes a camera  121  and a microphone  122 . The camera  121  receives and processes image frames of still pictures or video, which are obtained by an image sensor in a video call mode or a photographing mode. And, the processed image frames can be displayed on the display  151 . 
     The image frames processed by the camera  121  can be stored in the memory  160  or can be externally transmitted via the wireless communication unit  110 . Optionally, at least two cameras  121  can be provided to the mobile terminal  100  according to environment of usage. 
     The microphone  122  receives an external audio signal while the portable device is in a particular mode, such as phone call mode, recording mode and voice recognition. This audio signal is processed and converted into electric audio data. The processed audio data is transformed into a format transmittable to a mobile communication base station via the mobile communication module  112  in case of a call mode. The microphone  122  typically includes assorted noise removing algorithms to remove noise generated in the course of receiving the external audio signal. 
     The user input unit  130  generates input data responsive to user manipulation of an associated input device or devices. Examples of such devices include a keypad, a dome switch, a touchpad (e.g., static pressure/capacitance), a jog wheel, a jog switch, etc. 
     The sensing unit  140  provides sensing signals for controlling operations of the mobile terminal  100  using status measurements of various aspects of the mobile terminal. For instance, the sensing unit  140  may detect an open/close status of the mobile terminal  100 , relative positioning of components (e.g., a display and keypad) of the mobile terminal  100 , a change of position of the mobile terminal  100  or a component of the mobile terminal  100 , a presence or absence of user contact with the mobile terminal  100 , orientation or acceleration/deceleration of the mobile terminal  100 . As an example, consider the mobile terminal  100  being configured as a slide-type mobile terminal. In this configuration, the sensing unit  140  may sense whether a sliding portion of the mobile terminal is open or closed. Other examples include the sensing unit  140  sensing the presence or absence of power provided by the power supply  190 , the presence or absence of a coupling or other connection between the interface unit  170  and an external device. And, the sensing unit  140  can include a proximity sensor  141 . 
     The output unit  150  generates outputs relevant to the senses of sight, hearing, touch and the like. And, the output unit  150  includes the display  151 , an audio output module  152 , an alarm unit  153 , a haptic module  154 , a projector module  155  and the like. 
     The display  151  is typically implemented to visually display (output) information associated with the mobile terminal  100 . For instance, if the mobile terminal is operating in a phone call mode, the display will generally provide a user interface (UI) or graphical user interface (GUI) which includes information associated with placing, conducting, and terminating a phone call. As another example, if the mobile terminal  100  is in a video call mode or a photographing mode, the display  151  may additionally or alternatively display images which are associated with these modes, the UI or the GUI. 
     The display module  151  may be implemented using known display technologies including, for example, a liquid crystal display (LCD), a thin film transistor-liquid crystal display (TFT-LCD), an organic light-emitting diode display (OLED), a flexible display and a three-dimensional display. The mobile terminal  100  may include one or more of such displays. 
     Some of the above displays can be implemented in a transparent or optical transmittive type, which can be named a transparent display. As a representative example for the transparent display, there is TOLED (transparent OLED) or the like. A rear configuration of the display  151  can be implemented in the optical transmittive type as well. In this configuration, a user is able to see an object in rear of a terminal body via the area occupied by the display  151  of the terminal body. 
     At least two displays  151  can be provided to the mobile terminal  100  in accordance with the implemented configuration of the mobile terminal  100 . For instance, a plurality of displays can be arranged on a single face of the mobile terminal  100  in a manner of being spaced apart from each other or being built in one body. Alternatively, a plurality of displays can be arranged on different faces of the mobile terminal  100 . 
     In case that the display  151  and a sensor for detecting a touch action (hereinafter called ‘touch sensor’) configures a mutual layer structure (hereinafter called ‘touchscreen’), it is able to use the display  151  as an input device as well as an output device. In this case, the touch sensor can be configured as a touch film, a touch sheet, a touchpad or the like. 
     The touch sensor can be configured to convert a pressure applied to a specific portion of the display  151  or a variation of a capacitance generated from a specific portion of the display  151  to an electric input signal. Moreover, it is able to configure the touch sensor to detect a pressure of a touch as well as a touched position or size. 
     If a touch input is made to the touch sensor, signal(s) corresponding to the touch is transferred to a touch controller. The touch controller processes the signal(s) and then transfers the processed signal(s) to the controller  180 . Therefore, the controller  180  is able to know whether a prescribed portion of the display  151  is touched. 
     Referring to  FIG. 1 , a proximity sensor (not shown in the drawing) can be provided to an internal area of the mobile terminal  100  enclosed by the touchscreen or around the touchscreen. The proximity sensor is the sensor that detects a presence or non-presence of an object approaching a prescribed detecting surface or an object existing around the proximity sensor using an electromagnetic field strength or infrared ray without mechanical contact. Hence, the proximity sensor has durability longer than that of a contact type sensor and also has utility wider than that of the contact type sensor. 
     The proximity sensor can include one of a transmittive photoelectric sensor, a direct reflective photoelectric sensor, a mirror reflective photoelectric sensor, a radio frequency oscillation proximity sensor, an electrostatic capacity proximity sensor, a magnetic proximity sensor, an infrared proximity sensor and the like. In case that the touchscreen includes the electrostatic capacity proximity sensor, it is configured to detect the proximity of a pointer using a variation of electric field according to the proximity of the pointer. In this case, the touchscreen (touch sensor) can be classified as the proximity sensor. 
     In the following description, for clarity, an action that a pointer approaches without contacting with the touchscreen to be recognized as located on the touchscreen is named ‘proximity touch’. And, an action that a pointer actually touches the touchscreen is named ‘contact touch’. The meaning of the position on the touchscreen proximity-touched by the pointer means the position of the pointer which vertically opposes the touchscreen when the pointer performs the proximity touch. 
     The proximity sensor detects a proximity touch and a proximity touch pattern (e.g., a proximity touch distance, a proximity touch duration, a proximity touch position, a proximity touch shift state, etc.). And, information corresponding to the detected proximity touch action and the detected proximity touch pattern can be outputted to the touchscreen. 
     The audio output module  152  functions in various modes including a call-receiving mode, a call-placing mode, a recording mode, a voice recognition mode, a broadcast reception mode and the like to output audio data which is received from the wireless communication unit  110  or is stored in the memory  160 . During operation, the audio output module  152  outputs audio relating to a particular function (e.g., call received, message received, etc.). The audio output module  152  is often implemented using one or more speakers, buzzers, other audio producing devices, and combinations thereof. 
     The alarm unit  153  is output a signal for announcing the occurrence of a particular event associated with the mobile terminal  100 . Typical events include a call received event, a message received event and a touch input received event. The alarm unit  153  is able to output a signal for announcing the event occurrence by way of vibration as well as video or audio signal. The video or audio signal can be outputted via the display  151  or the audio output unit  152 . Hence, the display  151  or the audio output module  152  can be regarded as a part of the alarm unit  153 . 
     The haptic module  154  generates various tactile effects that can be sensed by a user. Vibration is a representative one of the tactile effects generated by the haptic module  154 . Strength and pattern of the vibration generated by the haptic module  154  are controllable. For instance, different vibrations can be outputted in a manner of being synthesized together or can be outputted in sequence. 
     The haptic module  154  is able to generate various tactile effects as well as the vibration. For instance, the haptic module  154  generates the effect attributed to the arrangement of pins vertically moving against a contact skin surface, the effect attributed to the injection/suction power of air though an injection/suction hole, the effect attributed to the skim over a skin surface, the effect attributed to the contact with electrode, the effect attributed to the electrostatic force, the effect attributed to the representation of hold/cold sense using an endothermic or exothermic device and the like. 
     The haptic module  154  can be implemented to enable a user to sense the tactile effect through a muscle sense of finger, arm or the like as well as to transfer the tactile effect through a direct contact. Optionally, at least two haptic modules  154  can be provided to the mobile terminal  100  in accordance with the corresponding configuration type of the mobile terminal  100 . 
     The projector module  155  is the element for performing an image projector function using the mobile terminal  100 . And, the projector module  155  is able to display an image, which is identical to or partially different at least from the image displayed on the display  151 , on an external screen or wall according to a control signal of the controller  180 . 
     In particular, the projector module  155  can include a light source (not shown in the drawing) generating light (e.g., laser) for projecting an image externally, an image producing means (not shown in the drawing) for producing an image to output externally using the light generated from the light source, and a lens (not shown in the drawing) for enlarging to output the image externally in a predetermined focus distance. And, the projector module  155  can further include a device (not shown in the drawing) for adjusting an image projected direction by mechanically moving the lens or the whole module. 
     The projector module  155  can be classified into a CRT (cathode ray tube) module, an LCD (liquid crystal display) module, a DLP (digital light processing) module or the like according to a device type of a display means. In particular, the DLP module is operated by the mechanism of enabling the light generated from the light source to reflect on a DMD (digital micro-mirror device) chip and can be advantageous for the downsizing of the projector module  151 . 
     Preferably, the projector module  155  can be provided in a length direction of a lateral, front or backside direction of the mobile terminal  100 . And, it is understood that the projector module  155  can be provided to any portion of the mobile terminal  100  according to the necessity thereof. 
     The memory unit  160  is generally used to store various types of data to support the processing, control, and storage requirements of the mobile terminal  100 . Examples of such data include program instructions for applications operating on the mobile terminal  100 , contact data, phonebook data, messages, audio, still pictures, moving pictures, etc. And, a recent use history or a cumulative use frequency of each data (e.g., use frequency for each phonebook, each message or each multimedia) can be stored in the memory unit  160 . Moreover, data for various patterns of vibration and/or sound outputted in case of a touch input to the touchscreen can be stored in the memory unit  160 . 
     Data for touch gestures corresponding to prescribed execution functions can be further stored in the memory unit  160 . Therefore, if a specific one of the touch gestures is performed on the touchscreen, the execution function corresponding to the specific touch gesture can be executed in the mobile terminal  100 . This will be explained later in this disclosure. 
     The memory unit  160  may be implemented using any type or combination of suitable volatile and non-volatile memory or storage devices including hard disk, random access memory (RAM), static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, magnetic or optical disk, multimedia card micro type memory, card-type memory (e.g., SD memory, XD memory, etc.), or other similar memory or data storage device. And, the mobile terminal  100  is able to operate in association with a web storage for performing a storage function of the memory  160  on Internet. 
     The interface unit  170  is often implemented to couple the mobile terminal  100  with external devices. The interface unit  170  receives data from the external devices or is supplied with the power and then transfers the data or power to the respective elements of the mobile terminal  100  or enables data within the mobile terminal  100  to be transferred to the external devices. The interface unit  170  may be configured using a wired/wireless headset port, an external charger port, a wired/wireless data port, a memory card port, a port for coupling to a device having an identity module, audio input/output ports, video input/output ports, an earphone port and/or the like. 
     The identity module is the chip for storing various kinds of information for authenticating a use authority of the mobile terminal  100  and can include User Identify Module (UIM), Subscriber Identify Module (SIM), Universal Subscriber Identity Module (USIM) and/or the like. A device having the identity module (hereinafter called ‘identity device’) can be manufactured as a smart card. Therefore, the identity device is connectible to the mobile terminal  100  via the corresponding port. 
     When the mobile terminal  110  is connected to an external cradle, the interface unit  170  becomes a passage for supplying the mobile terminal  100  with a power from the cradle or a passage for delivering various command signals inputted from the cradle by a user to the mobile terminal  100 . Each of the various command signals inputted from the cradle or the power can operate as a signal enabling the mobile terminal  100  to recognize that it is correctly loaded in the cradle. 
     The controller  180  typically controls the overall operations of the mobile terminal  100 . For example, the controller  180  performs the control and processing associated with voice calls, data communications, video calls, etc. The controller  180  may include a multimedia module  181  that provides multimedia playback. The multimedia module  181  may be configured as part of the controller  180 , or implemented as a separate component. 
     Moreover, the controller  180  is able to perform a pattern recognizing process for recognizing a writing input and a picture drawing input carried out on the touchscreen as characters or images, respectively. 
     The power supply unit  190  provides power required by the various components for the mobile terminal  100 . The power may be internal power, external power, or combinations thereof. 
     Various embodiments described herein may be implemented in a computer-readable medium using, for example, computer software, hardware, or some combination thereof. For a hardware implementation, the embodiments described herein may be implemented within one or more application specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), field programmable gate arrays (FPGAs), processors, controllers, micro-controllers, microprocessors, other electronic units designed to perform the functions described herein, or a selective combination thereof. Such embodiments may also be implemented by the controller  180 . 
     For a software implementation, the embodiments described herein may be implemented with separate software modules, such as procedures and functions, each of which perform one or more of the functions and operations described herein. The software codes can be implemented with a software application written in any suitable programming language and may be stored in memory such as the memory  160 , and executed by a controller or processor, such as the controller  180 . 
       FIG. 2A  is a front perspective diagram of a mobile terminal according to one embodiment of the present invention. 
     The mobile terminal  100  shown in the drawing has a bar type terminal body. Yet, the mobile terminal  100  may be implemented in a variety of different configurations. Examples of such configurations include folder-type, slide-type, rotational-type, swing-type and combinations thereof. For clarity, further disclosure will primarily relate to a bar-type mobile terminal  100 . However such teachings apply equally to other types of mobile terminals. 
     Referring to  FIG. 2A , the mobile terminal  100  includes a case (casing, housing, cover, etc.) configuring an exterior thereof. In the present embodiment, the case can be divided into a front case  101  and a rear case  102 . Various electric/electronic parts are loaded in a space provided between the front and rear cases  101  and  102 . Optionally, at least one middle case can be further provided between the front and rear cases  101  and  102  in addition. 
     The cases  101  and  102  are formed by injection molding of synthetic resin or can be formed of metal substance such as stainless steel (STS), titanium (Ti) or the like for example. 
     A display  151 , an audio output unit  152 , a camera  121 , user input units  130 / 131  and  132 , a microphone  122 , an interface  180  and the like can be provided to the terminal body, and more particularly, to the front case  101 . 
     The display  151  occupies most of a main face of the front case  101 . The audio output unit  151  and the camera  121  are provided to an area adjacent to one of both end portions of the display  151 , while the user input unit  131  and the microphone  122  are provided to another area adjacent to the other end portion of the display  151 . The user input unit  132  and the interface  170  can be provided to lateral sides of the front and rear cases  101  and  102 . 
     The input unit  130  is manipulated to receive a command for controlling an operation of the terminal  100 . And, the input unit  130  is able to include a plurality of manipulating units  131  and  132 . The manipulating units  131  and  132  can be named a manipulating portion and may adopt any mechanism of a tactile manner that enables a user to perform a manipulation action by experiencing a tactile feeling. 
     Content inputted by the first or second manipulating unit  131  or  132  can be diversely set. For instance, such a command as start, end, scroll and the like is inputted to the first manipulating unit  131 . And, a command for a volume adjustment of sound outputted from the audio output unit  152 , a command for a switching to a touch recognizing mode of the display  151  or the like can be inputted to the second manipulating unit  132 . 
       FIG. 2B  is a perspective diagram of a backside of the terminal shown in  FIG. 2A . 
     Referring to  FIG. 2B , a camera  121 ′ can be additionally provided to a backside of the terminal body, and more particularly, to the rear case  102 . The camera  121  has a photographing direction that is substantially opposite to that of the former camera  121  shown in  FIG. 21A  and may have pixels differing from those of the firmer camera  121 . 
     Preferably, for instance, the former camera  121  has low pixels enough to capture and transmit a picture of user&#39;s face for a video call, while the latter camera  121 ′ has high pixels for capturing a general subject for photography without transmitting the captured subject. And, each of the cameras  121  and  121 ′ can be installed at the terminal body to be rotated or popped up. 
     A flash  123  and a mirror  124  are additionally provided adjacent to the camera  121 ′. The flash  123  projects light toward a subject in case of photographing the subject using the camera  121 ′. In case that a user attempts to take a picture of the user (self-photography) using the camera  121 ′, the mirror  124  enables the user to view user&#39;s face reflected by the mirror  124 . 
     An additional audio output unit  152 ′ can be provided to the backside of the terminal body. The additional audio output unit  152 ′ is able to implement a stereo function together with the former audio output unit  152  shown in  FIG. 2A  and may be used for implementation of a speakerphone mode in talking over the terminal. 
     A broadcast signal receiving antenna  124  can be additionally provided to the lateral side of the terminal body as well as an antenna for communication or the like. The antenna  124  constructing a portion of the broadcast receiving module  111  shown in  FIG. 1  can be retractably provided to the terminal body. 
     A power supply unit  190  for supplying a power to the terminal  100  is provided to the terminal body. And, the power supply unit  190  can be configured to be built within the terminal body. Alternatively, the power supply unit  190  can be configured to be detachably connected to the terminal body. 
     A touchpad  135  for detecting a touch can be additionally provided to the rear case  102 . The touchpad  135  can be configured in a light transmittive type like the display  151 . In this case, if the display  151  is configured to output visual information from its both faces, it is able to recognize the visual information via the touchpad  135  as well. The information outputted from both of the faces can be entirely controlled by the touchpad  135 . Alternatively, a display is further provided to the touchpad  135  so that a touchscreen can be provided to the rear case  102  as well. 
     The touchpad  135  is activated by interconnecting with the display  151  of the front case  101 . The touchpad  135  can be provided in rear of the display  151  in parallel. The touchpad  135  can have a size equal to or smaller than that of the display  151 . 
     In the following description, embodiments related to a controlling method applicable to the above-configured mobile terminal are explained with reference to the accompanying drawings. 
     In the following description of the embodiments, assume that the display  151  includes a touchscreen. If the display  151  includes the touchscreen, it further facilitates the following embodiments to be implemented. In the following description, a display screen of the display  151  shall be indicated by a reference number  400 . 
       FIG. 3  is a flowchart for a method of controlling a mobile terminal according to an embodiment of the present invention, and  FIGS. 4 to 9  are diagrams for display screens on which a method of controlling a mobile terminal according to an embodiment of the present invention is implemented. 
     Referring to ( 4 - 1 ) of  FIG. 4 , the mobile terminal  100  is in a standby mode and an image (hereinafter named ‘standby image’) of the standby mode is displayed on the touchscreen  400 . In the standby image, at least one indicator  410  indicating an operational state of the mobile terminal  100 , a background image  420  and at least one menu icon  430  can exist. It is not necessary for all of the indicator  410 , the background image  420  and the menu icon  430  to exist in the standby image. For instance, at least one of them may not be displayed on the standby image. 
     Subsequently, an event may not occur during a prescribed time in the mobile terminal  100 . As mentioned in the foregoing description, this event may include at least one of a call signal reception, a message reception, a key signal input and a touch input. 
     If so, referring to ( 4 - 2 ) of  FIG. 4 , the mobile terminal  100  is able to enter a locked state [S 31 ]. Once the mobile terminal  100  enters the locked state, any touch may not be recognized on the touchscreen except prescribed touch gestures explained in the following description. 
     If the mobile terminal  100  enters the locked state, the standby image can be displayed on the touchscreen  400  in a manner of image blurring [S 32 ]. 
     In this case, this image blurring may correspond to an image processing scheme of blurring a line, boundary and the like within an image to enable the image to be seen as if seen through frosted glass. It is a matter of course that the image-blurring image can be restored into an original image before the image blurring. The restored image shall be named an image-burring released image or image deblurring image. 
     A locked state indicator  510  can be displayed on the touchscreen  400  to indicate that the mobile terminal  100  is in the locked state. When the mobile terminal  100  is in the locked state, it is not mandatory for the locked state indicator  510  to be displayed. Optionally, the locked state indicator may not be displayed. 
     Subsequently, referring to ( 4 - 3 ) of  FIG. 4 , a prescribed touch gesture can be performed on the touchscreen  400  [S 33 ]. The prescribed touch gesture is performed in a manner of touching the touchscreen  400  with a pointer and then dragged to leave a prescribed trace. This prescribed touch gesture will be explained later in this disclosure. While the touch gesture is performed, the standby image can be displayed by image deblurring on a portion  440  corresponding to the trace of the touch gesture. 
     If the prescribed touch gesture is performed, the locked state of the mobile terminal  100  can be canceled [S 34 ]. 
     Therefore, referring to ( 4 - 1 ) of  FIG. 4 , the whole standby image can be displayed in a manner of image deblurring on the touchscreen  400  (i.e., the image deblurring is canceled) [S 35 ]. 
     In the following description, the prescribed touch gesture is explained with reference to  FIG. 5 . 
     Referring to ( 5 - 1 ) of  FIG. 5 , the touch gesture may include a touch &amp; drag performed in a manner of touching the touchscreen  400  with such a pointer as a finger, a stylus pen and the like and then dragging the pointer in a prescribed form or according to a prescribed trace. For instance, in ( 5 - 1 ) of  FIG. 5 , the prescribed form is ‘r’, by which the present invention is non-limited. And, it is understood that the prescribed form can include any other preset form. 
     Referring to ( 5 - 2 ) of  FIG. 5 , the touch gesture may include a touch &amp; drag performed in a manner of touching the touchscreen  400  with a pointer and then dragging the pointer in a prescribed distance d or more. Alternatively, the touch gesture may include a touch &amp; drag performed in a manner of dragging the touched pointer according to at least one or more reciprocations. 
     Referring to ( 5 - 3 ) of  FIG. 5 , the touch gesture may include a touch &amp; drag performed in a manner of touching the touchscreen  400  with a pointer and then rubbing a prescribed area on the touchscreen with the touched pointer. For instance, the touch gesture may include a touch &amp; drag to enable a prescribed area or more area of the touchscreen  400  to be image-deblurred by the trace of the touch gesture. 
     In the following description, when the mobile terminal  100  is in the locked state, the image-blurring standby image displayed on the touchscreen  400  is explained with reference to  FIG. 6 . 
     Referring to ( 6 - 1 ) of  FIG. 6 , a portion of the standby image on the touchscreen  400  may not be image-blurred even if the mobile terminal  100  enters the locked state. In ( 6 - 1 ) of  FIG. 6 , exemplarily shown is that the image-deblurred portion is a watch region  450  indicating a current hour. The image-deblurred portion  450  may include any portion of the standby image. 
     In ( 6 - 1 ) of  FIG. 6 , shown is that the locked state indicator  510  is displayed on the touchscreen  400  by image deblurring. As mentioned in the foregoing description, it does not matter that the locked state indicator  510  is not displayed. 
     Referring to ( 6 - 2 ) of  FIG. 6 , a window  520  indicating information necessary for the mobile terminal  100  can be displayed without image blurring on the image-blurring standby image on the touchscreen. In ( 6 - 2 ) of  FIG. 6 , exemplarily shown is that the necessary information includes current hour and data information, by which the present embodiment is non-limited. 
     When an event of a message reception takes place in the mobile terminal in the locked state, the transition of the standby image is described with reference to  FIG. 7  and  FIG. 8  as follows. In this case, the message may include one of a short text message, a multimedia message, an instant message and an email. For clarity and convenience of the following description, assume that the message includes the short text message. 
     Referring to ( 7 - 1 ) of  FIG. 7 , while the mobile terminal  100  is in the locked state, the standby image is displayed on the touchscreen  400  in a manner of image blurring. 
     In doing so, such an event as a message reception may take place in the mobile terminal  100 . 
     If so, referring to ( 7 - 2 ) of  FIG. 7 , a message window  460  according to the event can be displayed on the touchscreen  400  in a manner of image blurring. Therefore, although the message window  460  contains a content of the message, an image of the content can be displayed not to be recognized by a user in a manner of image blurring. 
     Referring to ( 7 - 3 ) of  FIG. 7 , a prescribed touch gesture can be performed on the touchscreen  400 . This prescribed touch gesture can be the same touch gesture to unlock the locked state shown in  FIG. 4  or  FIG. 5 . Alternatively, the prescribed touch gesture may differ from the former touch gesture in a trace, length or size of the touch gesture. Details of the prescribed touch gesture will be omitted in the following description for clarity and convenience of the present specification. 
     The prescribed touch gesture can be performed on the message window  460 . 
     If so, referring to ( 7 - 4 ) of  FIG. 7 , after the prescribed touch gesture has been performed, while the touchscreen is touched with the pointer, the message window  460  is displayed by image deblurring. Therefore, a content of the message window can be displayed to be recognized by a terminal user. 
     The message window  460  can be displayed by deblurring right after the prescribed touch gesture has been performed. Alternatively, after the prescribed touch gesture has been performed, the message window  460  can be displayed by image deblurring gradually for a prescribed time. 
     Although the message window  460  is image-deblurred, a standby image on the touchscreen  400  except the message window  460  can keep being displayed by image blurring. 
     If a touch release is performed in a manner that the pointer is separated from the touchscreen  400 , referring to ( 7 - 5 ) and ( 7 - 6 ) of  FIG. 7 , an image of the message window  460  can blur gradually for a prescribed time. Alternatively, when the touch with the pointer is released, the image of the message window  460  can blur instantly. 
     In the above description, after the touch gesture has been performed, when the touch release is performed, the message window  460  undergoes image blurring, by which the present embodiment is non-limited. Alternatively, after the touch gesture has been performed, the message window  460  undergoes image deblurring for a prescribed time irrespective of the touch release of the pointer. After duration of the prescribed time, the image window  460  can undergo image blurring. 
     In the above description, when the message event takes place in the mobile terminal  100 , the image-blurring message window is displayed, by which the present embodiment is non-limited. Alternatively, when the message event takes place, an image-deblurring message window can be displayed. This is further explained in detail with reference to  FIG. 8  as follows. 
     Referring to ( 8 - 1 ) of  FIG. 8 , while the mobile terminal  100  is in the locked state, the standby image is displayed on the touchscreen  400  in a manner of image blurring. 
     In doing so, such an event as a message reception may take place in the mobile terminal  100 . 
     If so, referring to ( 8 - 2 ) of  FIG. 8 , a message window  460  according to the event can be displayed on the touchscreen  400  in a manner of image deblurring. Therefore, the message window  460  is able to contain a content of the message and an image of the content can be displayed to be recognized by a user. 
     Subsequently, if a manipulation of the user input unit  130  or a touch to the touchscreen  400  is not conducted for a prescribed time by a terminal user, the image window  460 , as shown in ( 8 - 3 ) and ( 804 ) of  FIG. 8 , can under go image blurring gradually. 
     When the message window  460  undergoes the image blurring, if a prescribed touch gesture is performed, image deblurring can occur as explained in the foregoing description with reference to  FIG. 7 . 
       FIG. 9  is explained as follows. 
     Referring to ( 9 - 1 ) of  FIG. 9 , while the mobile terminal  100  is in the locked state, the standby image is displayed on the touchscreen  400  in a manner of image blurring. And, a locked state indicator  510  can be displayed on the touchscreen  400 . 
     Subsequently, a prescribed key button provided to the user input unit  130  can be pressed. 
     If so, referring to ( 9 - 2 ) and ( 9 - 3 ) of  FIG. 9 , while the key button is being pressed, the standby image can undergo image deblurring gradually. Alternatively, it is understood that the standby image can undergo image deblurring as soon as the key button is pressed. Although the standby image undergoes the image deblurring, the mobile terminal  100  can still keep the locked state. 
     If the key button is pressed no longer, the standby image can undergo image blurring gradually or instantly. 
     Accordingly, the present invention provides the following effects and/or advantages. 
     First of all, according to at least one of embodiments of the present invention, even if a mobile terminal provided with a touchscreen is in a locked state to prevent an incorrect touch input to the touchscreen, a terminal user is facilitated to use a prescribed necessary function. 
     It will be apparent to those skilled in the art that various modifications and variations can be specified into other form(s) without departing from the spirit or scope of the inventions. 
     For instance, the above-described methods can be implemented in a program recorded medium as computer-readable codes. The computer-readable media include all kinds of recording devices in which data readable by a computer system are stored. The computer-readable media include ROM, RAM, CD-ROM, magnetic tapes, floppy discs, optical data storage devices, and the like for example and also include carrier-wave type implementations (e.g., transmission via Internet). And, the computer can include the controller  180  of the terminal. 
     It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the inventions. Thus, it is intended that the present invention covers the modifications and variations of this invention provided they come within the scope of the appended claims and their equivalents.