Patent Publication Number: US-2011065480-A1

Title: Mobile terminal

Description:
CROSS REFERENCE TO RELATED APPLICATIONS 
     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. 10-2009-0088187, filed on Sep. 17, 2009 and Korean Application No. 10-2009-0088189, filed on Sep. 17, 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 having a user input unit. Although the present invention is suitable for a wide scope of applications, it is particularly suitable for providing various visual effects including a 3-dimensional effect to an exterior of the mobile terminal. 
     2. Discussion of the Related Art 
     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. 
     As functionality of the mobile terminal tends to be diversified, the mobile terminal is implemented as a multimedia player type equipped with composite functions including picture or video photographing, music or video file playback, games, broadcast reception and the like for example. 
     Recently, a mobile terminal equipped with a communication function and the like is frequently used as a communication means. Moreover, the mobile terminal tends to be equipped with a data processing function, a multimedia function and the like in various ways together with a function of the communication means. Thus, it becomes vaguer to discriminate the mobile terminal from a computer and the like. 
     In case of selecting such a mobile terminal, a consumer is able to select a mobile terminal according to sensitive and emotional satisfaction including a design of the mobile terminal and the like as well as the above described functions. Thus, an exterior of a mobile terminal plays a major role in selecting mobile terminals. 
     Generally, a mobile terminal equipped with a communication function can be classified by a bar type (e.g., a full touchscreen type, etc.), a folder type, a slide type or the like. 
     In case of the bar type, a battery and/or the like is (detachably) provided to a backside of a body. In case of the folder type, a battery and/or the like is (detachably) provided to a backside of a lower body. A camera, a flash for providing an illumination function required for photographing and the like are provided thereto. Yet, a size of a used are is relatively smaller than a space size. And, its design is too simple. 
     Designs and configurations of the battery provided backsides of the body and the like are mostly similar to each other. And, it is not easy to diversify the corresponding designs. Therefore, the demand for a method of increasing user&#39;s interest and satisfaction in a manner of diversifying a design of a front face of a mobile terminal or a design of a surface housing is rising. 
     Meanwhile, every mobile terminal can be provided with at least one display unit and at least one user input unit. Except a case of a mobile terminal of a full touchscreen type, the user input unit can be provided in a manner that a plurality of input keys are provided to a front or lateral face of a body housing. 
     In general, an input key included in a user input unit can be provided with an illumination function. Each input key is inscribed with a symbol, pattern and/or the like to provide an identity symbol. 
     However, the above-described input key included in the user input unit is used as an input means for inputting a user input and decreases an area occupied by the display unit. Recently, a mobile terminal tends to extend an area of a display unit by reducing a waste of an area consumed by a user input unit. 
     Moreover, since most of user inputs are similar to each other in design and/or configuration, it is difficult to diversify the designs and the like. Therefore, the demand for a method of enhancing user&#39;s interest and satisfaction by diversifying a front or top face design of a mobile terminal including a user input unit is ongoing to rise. 
     SUMMARY OF THE INVENTION 
     Accordingly, the present invention is directed to a mobile terminal that substantially obviates 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, by which various visual effects including a 3-dimensional effect can be provided to an exterior of the mobile terminal via illumination. 
     Another object of the present invention is to provide a mobile terminal, by which a user input unit of the mobile terminal can be provided with various visual effects including a 3-dimensional effect. 
     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 display unit, a control unit configured to control the display unit, a body configured to load the display unit, and a 3D (3-dimensional) member provided to at least one partial region of the body including a lens sheet configured to arrange convex lenses in a grid form, and a transparent sheet provided under the lens sheet, wherein a pattern of a specific is printed on a position corresponding to a focal distance of the convex lenses of the lens sheet. 
     In another aspect of the present invention, a mobile terminal includes a body configuring an exterior of the mobile terminal, a 3D (3-dimensional) member provided to at least one partial region of the body including a lens sheet configure to arrange convex lenses in a grid form and a transparent sheet provided under the lens sheet having a pattern of a specific shape printed on a bottom surface of the transparent sheet, a light source unit configured to provide an illumination effect to the 3D member, the light source including at least one LED, and a control unit configured to control the light source unit. 
     In a further aspect of the present invention, a mobile terminal includes a body configuring an exterior of the mobile terminal, a display unit provided to the body, a 3D (3-dimensional) member having a bottom surface, wherein a pattern of a specific shape and an identity symbol, character or numeral are printed on the bottom surface, wherein the pattern of the specific shape is enlarged to appear greater than a real size and the identity symbol, character or numeral appears in a real size, and a control unit controlling the display unit. 
     Accordingly, the present invention provides the following effects and/or advantages. 
     First of all, the present invention is able to provide a mobile terminal having an exterior and/or user input unit provided with various visual effects including a 3D effect. 
     Secondly, the present invention diversifies designs of a front face, surface housing and/or user input unit of a mobile terminal, thereby enhancing user&#39;s interest and satisfaction. 
     Thirdly, the present invention enables a surface housing and/or user input unit of a mobile terminal to be configured with a 3D effect and also provides an illumination function thereto, thereby further providing the surface housing and/or user input unit with fancy and colorful visual effects. 
     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. 2  is a front perspective diagram of a mobile terminal according to one embodiment of the present invention; 
         FIG. 3  is an exploded perspective diagram of a housing of a mobile terminal according to one embodiment of the present invention; 
         FIG. 4  is a diagram of a 3-dimensional (3D) member according to one embodiment of the present invention; 
         FIG. 5  is a diagram for describing how a mobile terminal according to one embodiment of the present invention operates; 
         FIG. 6  is a diagram of various examples of a cross-sectional diagram of the mobile terminal shown in  FIG. 5 ; 
         FIG. 7  is a diagram for describing how a mobile terminal according to another embodiment of the present invention operates; 
         FIG. 8  is a diagram of various examples of a cross-sectional diagram of the mobile terminal shown in  FIG. 7 ; 
         FIG. 9  is a layout of a bottom surface of a light guide plate (LGP) loaded in a mobile terminal according to one embodiment of the present invention; 
         FIG. 10  is a perspective diagram of a mobile terminal according to a further embodiment of the present invention; 
         FIG. 11  is a front perspective diagram of a mobile terminal according to a further embodiment of the present invention; 
         FIG. 12  is a rear perspective diagram of a mobile terminal according to a further embodiment of the present invention; 
         FIG. 13  is a layout of a first user input unit of the mobile terminal shown in  FIG. 11 ; 
         FIG. 14  is an exploded perspective diagram of a first user input unit of the mobile terminal shown in  FIG. 11 ; 
         FIG. 15  is a cross-sectional diagram of a first user input unit of the mobile terminal shown in  FIG. 11 ; 
         FIG. 16  is a layout of a second user input unit of the mobile terminal shown in  FIG. 11 ; 
         FIG. 17  is an exploded perspective diagram of a second user input unit of the mobile terminal shown in  FIG. 11 ; and 
         FIG. 18  is a cross-sectional diagram of a second user input unit of the mobile terminal shown in  FIG. 11 . 
     
    
    
     DETAILED DESCRIPTION OF THE INVENTION 
     In the following detailed description, reference is made to the accompanying drawing figures which form a part hereof, and which show by way of illustration specific embodiments of the invention. 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 similar 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. 
     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. 
     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. 
     Meanwhile, the A/V (audio/video) input unit  120  is configured to input an audio signal or a video signal and can include a camera module  121 , a microphone module  122  and the like. The camera module  121  processes an image frame of a still or moving picture obtained by an image sensor in a video call mode or a photographing mode. And, the processed image frame can be displayed on the display  151 . 
     The image frame processed by the camera module  121  is stored in the memory  160  or can be externally transmitted via the wireless communication unit  110 . At least two camera modules  121  can be provided according to a configuration type of the terminal. 
     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 such as static pressure/capacitance, a jog wheel and a jog switch. A specific example is one in which the user input unit  130  is configured as a touchpad in cooperation with a display, which will be described in more detail below. 
     The sensing unit  140  detects such a current configuration of the mobile terminal  100  as an open/closed configuration of the mobile terminal  100 , a location of the mobile terminal  100 , a presence or non-presence of user contact and the like and then generates a sensing signal for controlling an operation of the mobile terminal  100 . 
     For instance, if the mobile terminal  100  is a slide phone type, the sensing unit  140  is able to sense whether a slide phone is open or closed. And, the sensing unit  140  is responsible for sensing functions related to a presence or non-presence of power supply of the power supply  190 , an external device loading of the interface unit  170  and the like. 
     The output unit  150  is configured to output an audio signal, a video signal and/or an alarm signal. And, the output unit  150  can include the display  151 , an audio output module  152 , an alarm output module  153 , a haptic module  154 , an illumination unit  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. 
     The display  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. For instance, both an outer display (not shown in the drawing) and an inner display (not shown in the drawing) can be provided to the mobile terminal  100 . 
     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 illumination unit  155  can be provided for various illumination effects of the mobile terminal  100 . For instance, recently, mobile terminals tend to provide a user input unit with an illumination function. For this, the illumination unit  155  can be provided separate from a backlight of the display unit  151 . And, the illumination unit  155  can include light emitting diodes (LED) and the like, which shall be described later in this disclosure. 
     The memory  160  can store programs for the processing and control of the controller  180  and is also able to perform a function for temporary storage of inputted/outputted data (e.g., phonebook data, message data, still picture data, moving picture data, etc.). Moreover, the memory  160  can store data of various patterns of vibration and sound outputted in case of the touch input to the touchscreen. 
     The memory  160  can include at least one storage medium of such a type as a flash memory type, a hard disk type, a multimedia card micro type, a card type memory (e.g., SD memory, XD memory, etc.), RAM and ROM. Moreover, the mobile terminal  100  is able to operate a web storage that performs a storage function of the memory  160  on internet. 
     The interface unit  170  plays a role as an interface with every external device connected to the mobile terminal  100 . For instance, the external devices include a wire/wireless headset, an external electricity charger, a wire/wireless data port, a card socket (e.g., memory card socket, SIM/UIM card socket, etc.), audio I/O (input/output) terminals, video I/O (input/output) terminals, earphones, etc. The interface unit  170  receives data from the external device or is supplied with power. The interface unit  170  then delivers the received data or the supplied power to the corresponding component within the mobile terminal  100  or transmits data within the portable terminal  100  to the corresponding external device. 
     The controller  180  normally controls overall operations of the mobile terminal  100 . For instance, the controller  180  performs the control and processing related to speech call, data communication, video call and the like. And, the controller  180  can be provided with a multimedia play module  181  for multimedia playback as well. The multimedia playback module  180  can be configured as hardware within the controller  180  or software separate from the controller  180 . 
     The power supply  190  receives an external and/or internal power source and then supplies power required for operations of the respective components, under the control of the controller  180 . 
     In the above description so far, the mobile terminal according to the present invention is described in aspect of components according to functions. In the following description, a mobile terminal according to the present invention is explained in aspect of components according to an exterior. 
     In the following description, for clarity, a slider type mobile terminal is selected for example from mobile terminals of various types including a folder type, a bar type, a swing type, a slider type and the like. Therefore, the present invention is non-limited by the slider type mobile terminal but is applicable to mobile terminals of all types including the above-mentioned types. 
       FIG. 2  is a front perspective diagram of a mobile terminal according to one embodiment of the present invention. In particular,  FIG. 2  ( a ) is a perspective diagram of a mobile terminal according to one embodiment of the present invention, in which a front face of the mobile terminal is viewed. 
     Referring to  FIG. 2 , of a mobile terminal according to one embodiment of the present invention includes a display unit, at least one housing having at least one opening to enclose the display unit, a 3D member attached to the opening of the housing, the 3D member including a lens sheet having convex lens arranged thereon in a grid form and a transparent sheet provided under the lens sheet in a manner of having a pattern of a specific shape printed on a bottom face, a light source unit including a light guide plate provided under the 3D member and at least one LED provided next to a lateral side of the light guide plate, and a control unit (not shown) controlling the display unit and the light source unit. 
     The mobile terminal  100  shown in  FIG. 2  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. 
     The terminal body includes a housing configuring an exterior thereof. In the present embodiment, the housing can be divided into a front housing  101  and a rear housing  102 . Various electric/electronic parts are loaded in a space provided between the front and rear housings  101  and  102 . Optionally, at least one middle housing can be further provided between the front and rear housings  101  and  102  in addition. 
     The housings  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 unit  151 , an audio output unit  152 , a camera  121 , user input units  130 / 131  and  132 , a microphone  122 , an interface  170  and the like can be provided to the terminal body. 
     Moreover, a mobile terminal according to the present invention includes a 3D (3-dimensional) member  10  attached to the opening of the housing. In particular, the 3D member  10  includes a lens sheet having convex lens arranged in a grid form on an outer surface of the front housing  101  and a transparent sheet provided under the lens sheet in a manner of having a pattern of a specific shape printed on a bottom face. 
     In order to give a 3D effect to the exterior of the mobile terminal by avoiding monotonous exterior of the mobile terminal, an opening is provided to the housing configuring the exterior of the mobile terminal. And, the 3D member  10  can be loaded in the opening. The 3D member  10  shall be described in detail later in this disclosure. 
     The display  151  occupies most of a main face of the front housing  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  132  and the microphone  122  are provided to another area adjacent to the other end portion of the display  151 . The user input unit  132 , the interface  170  and the like can be provided to lateral sides of the front and rear housings  101  and  102 . 
     The user input unit  130  is manipulated to receive an input of a command for controlling an operation of the mobile terminal  100 . And, the input unit  130  is able to include a plurality of user input units  131  and  132 . The user input units  131  and  132  can be generally 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. 
     Contents inputted by the first/second user input units  131 / 132  can be diversely set. For instance, such a command as start, end, scroll and the like is inputted to the first user input 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 user input unit  132 . 
       FIG. 2  ( b ) is a perspective diagram of a backside of the terminal shown in  FIG. 2  ( a ). 
     Referring to  FIG. 2  ( b ), a camera  121 ′ can be additionally provided to a backside of the terminal body, and more particularly, to the rear housing  102 . The latter camera  121 ′ has a photographing direction that is substantially opposite to that of the former camera  121  shown in  FIG. 2  ( a ) and may have pixels differing from those of the former 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 immediately. 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 on 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. 2  ( a ) and may be used for implementation of a speakerphone mode in talking over the terminal. 
     A broadcast signal receiving antenna  116  can be additionally provided to the lateral side of the terminal body as well as an antenna for communication or the like. The antenna  116  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 mobile terminal  100  is provided to the terminal body. And, the power supply unit  190  can be configured to be built in the terminal body. Alternatively, the power supply unit  190  can be configured to be detachably connected to the terminal body. 
     Like the front housing  101  shown in  FIG. 2  ( a ), a 3D (3-dimensional) member  10  attached to the opening of the housing can be provided. In particular, the 3D member  10  includes a lens sheet having convex lens arranged in a grid form on an outer surface of the rear housing  102  and a transparent sheet provided under the lens sheet in a manner of having a pattern of a specific shape printed on a bottom face. 
       FIG. 3  is an exploded perspective diagram of a housing of a mobile terminal according to one embodiment of the present invention. Particularly,  FIG. 3  is an exploded perspective diagram of the 3D member  10  attached to the backside of the mobile terminal shown in  FIG. 2  ( b ). To avoid redundant description of the same part, for clarity, the following description is for the exploded perspective diagram of the backside of the mobile terminal shown in  FIG. 2  ( b ). Therefore, a location, to which the 3D member  10  is applied, is non-limited by the backside of the mobile terminal. And, the 3D member  10  is applicable to any portion that configures the exterior of the mobile terminal without limitation put on the 3D member applied location. 
     Referring to  FIG. 3 , a 3D (3-dimensional) member  10  is attached to an opening  102 S of the rear housing  102 . And, the 3D member  10  includes a lens sheet having convex lens arranged in a grid form and a transparent sheet provided under the lens sheet in a manner of having a pattern of a specific shape printed on its bottom face. This shall be described in detail with reference to  FIG. 4  later in this disclosure. 
     The 3D member  10  can include at least one loading holes  10   h   1  and  10   h   2  so that the camera  121 ′, the flash  123 , the mirror  124 , the audio output unit  152 ′ and the like, which are provided to the backside of the mobile terminal, can be externally exposed. 
     The 3D member  10  gives a 3D effect of itself and is able to enhance an exterior of the mobile terminal. Moreover, the mobile terminal according to the present invention is able to give an illumination effect to maximize the 3D effect of the 3D member  10  and provide a fancy exterior. 
     In order to minimize a thickness increase of the mobile terminal with the illumination effect, the mobile terminal is provided with a light guide plate  20 . And, it is able to provide the illumination effect using an edge mechanism for enabling light to enter a lateral side of the light guide plate  20 . Alternatively, a light source is provided under the 3D member to give an illumination effect by a direct mechanism. 
     In order to provide the illumination effect, the light guide plate  20  is provided under the 3D member  10 . In this case, the light guide plate  20  provided under the 3D member  10  can have a size and/or shape corresponding to that of the 3D member  10 . 
     In order to provide light to the lateral side of the light guide plate  20 , at least one or more light source units  51  can be further provided. The light source unit  51  can include any light source capable of giving an illumination effect to the 3D member  10 . According to the present embodiment, the light source unit  51  can include at least one light emitting diode (hereinafter abbreviated LED). In the following description, the LED is indicated using the same reference number unless there is special explanation. 
     A plurality of LEDs  51  can be included to provide light to lateral side of edge. And, the LED  51  can be provided to an inner side of the opening  102 S of the rear housing  102 . The 3D member  10  and the light guide plate  20  shall be described later in this disclosure. 
     Meanwhile, the LED  51  can be provided under the housing (e.g., the rear housing  102 ). This is to minimize the brightness deviation of light emitted from the LED  51 . In particular, brightness near the LED  51  is reduced in a manner of cutting of light emitted from the LED  51 . 
       FIG. 4  is a diagram of a 3-dimensional (3D) member according to one embodiment of the present invention. In particular,  FIG. 4  ( a ) is an exploded perspective diagram of a 3D member  10 .  FIG. 4  ( b ) is a cross-sectional diagram of one example for a 3D member  10 . And,  FIG. 4  ( c ) is a cross-sectional diagram of another example for the 3D member  10 . 
     A mobile terminal according to the present invention includes a 3D member  10  to give a 3D effect to a user input unit. The 3D member  10  is attached to the opening of the housing  102 . And, the 3D member includes a lens sheet  11  having convex lens  111  arranged in a grid form and a transparent sheet  13  provided under the lens sheet  11  in a manner of having a pattern  15   b  of a specific shape printed on its bottom face. 
     On the lens sheet  11 , a plurality of the convex lenses  111  are arranged in a grid form. Each of the convex lenses  111  has a constant focal distance d(f). A shape or pattern located at the focal distance d(f) can be observed in a manner of being enlarged. 
     The transparent sheet  13  formed of a transparent light-transmittive material is provided under the lens sheet  11 . In this case, the transparent sheet  13  can have a preset thickness. 
     The pattern  15   b  of the specific shape can be printed on a bottom surface of the transparent sheet  13 . 
     The pattern  15   b  of the specific shape can be printed on a location corresponding to the focal distance d(f) of the convex lens  111 . And, the pattern  15   b  of the specific shape printed on the location corresponding to the focal distance d(f) of the convex lens  111  is observed by being enlarged greater than a real size of the pattern. 
     Thus, the pattern  15   b  of the specific shape is printed on the location corresponding to the focal distance d(f) of the convex lens  111  of the lens sheet  11 , thereby giving a 3D effect with a fabulous visual effect. 
     In addition to the pattern  15   b  of the specific shape, various identity symbols, characters, numerals  15   a  and the like can be further printed on the 3D member  10 . In this case, since the identity symbols, characters, numerals  15   a  and the like are printed not to provide the 3D effect but to be used as indications for specific identifications, they need not to be enlarged by the convex lenses  111 . 
     To enable the identity symbol, character or numeral  15   a  to be observed without being enlarged by the convex lens  111 , the identity symbol, character or numeral  15   a  is printed at a height different from the focal distance d(f) of the convex lens  111  or image enlargement by the convex lens  111  is cut off. 
       FIG. 4  ( b ) is a cross-sectional diagram of one example for a 3D member  10 . 
     Referring to  FIG. 4  ( b ), the identity symbol, character or numeral  15   a  can be first printed on the bottom surface of the transparent sheet  13 . This enables the identity symbol, character or numeral  15   a  to be printed at a location closer than the focal distance d(f) of the convex lens  111 . 
     Thus, in a manner of printing the identity symbol, character or numeral  15   a  over the pattern  15   b  of the specific shape, the pattern  15   b  of the specific shape printed in the focal distance d(f) of the convex lens  111  gives a 3D effect by being enlarged by the convex lens  111 . And, the identity symbol, character or numeral  15   a  printed over the pattern  15   b  of the specific shape can have a visual effect in a manner of floating over the pattern  15  of the specific shape. 
     Preferably, the pattern  15   b  of the specific shape can have one of various configurations. For example, the pattern  15   b  of the specific shape can be configured in a manner that the same figure is repeated in a specific direction. 
       FIG. 4  ( c ) is a cross-sectional diagram of another example for the 3D member  10 . 
     Referring to  FIG. 4  ( c ), the 3D member  10  includes a transparent resin layer  11   p  provided on a specific region of a top surface of the lens sheet  11 , unlike the former 3D member  10  shown in  FIG. 4  ( b ). 
     Unlike the former example shown in  FIG. 4  ( b ), according to the latter example shown in  FIG. 4  ( c ), both of the pattern  15   b  of the specific shape and one of the identity symbol, character and numeral  15   a  printed on the bottom surface of the transparent sheet  13  are simultaneously printed in the focal distance d(f) of the convex lens  11  provided to the lens sheet  11 . If both of the pattern  15   b  of the specific shape and the identity symbol, character or numeral  15   a  are simultaneously printed in the focal distance d(f), it is able to simplify a fabrication process. 
     The transparent resin layer  11   p  is provided to the specific region of the lens sheet  11  to cancel out a lens effect (enlargement effect) caused by the convex lens  111  of the lens sheet  11 . 
     Particularly, the transparent resin layer  11   p  is provided to enable the identity symbol, character or numeral  15   a , for which a 3D effect is not requested, to be observed in a real shape without being enlarged by the convex lens  111  of the lens sheet  11 . 
     Thus, in a manner of providing the transparent resin layer  11   p  to the top surface of the lens sheet  13  located over the identity symbol, character or numeral  15   a , it is able to selectively give an enlargement effect due to the convex lens  111  of the lens sheet  11 . 
     Therefore, in a manner of removing the lens effect from a necessary portion by adding the transparent resin layer  11   p  to the lens sheet  11  selectively, it is able to clearly observe the identity symbol, character or numeral  15   a.    
       FIG. 5  is a diagram for describing how a mobile terminal according to one embodiment of the present invention operates. In particular,  FIG. 5  ( a ) shows a state that the 3D member  10  is loaded in the rear housing  102  configuring the backside of the mobile terminal  100  and a state that the LED  51  configured to provide an illumination function is turned off. And,  FIG. 5  ( b ) shows a state that the 3D member  10  is loaded in the rear housing  102  configuring the backside of the mobile terminal  100  and a state that the LED  51  configured to provide an illumination function is turned on. The redundant descriptions with reference to  FIGS. 2 to 4  shall be omitted from the following description. 
     Referring to  FIG. 5 , although the LED  51  is turned off, the pattern  15   b  of the specific shape printed on the 3D member  10  can give a 3D effect to the exterior of the mobile terminal according to the lens effect. 
     Yet, if the LED  51  is turned on, referring to  FIG. 5  ( b ), an illumination can be provided to the bottom surface of the 3D member  10 . 
     Once the illumination is provided to the 3D member  10 , it is able to provide the 3D member  10  with a fancy exterior attributed to the illumination as well as various 3D effects. 
     In particular, the pattern  15   b  of the specific shape can provide the 3D effect and visual variations of itself. In addition, if the illumination is provided to the 3D member  10 , the pattern  15   b  of the specific shape can provide a fancy design with a 3D effect. 
       FIG. 6  is a diagram of various examples of a cross-sectional diagram of the mobile terminal shown in  FIG. 5 . 
     Referring to  FIG. 6  ( a ), an illumination can be provided in a following manner. First of all, a 3D member  10  is loaded in an opening provided to a housing  102  configuring an exterior of a mobile terminal. A light guide plate  20  is provided under the 3D member  10 . And, a light source unit  51  is provided next to a lateral side of the light guide plate  20 . Thus, an illumination can be provided. 
     An LED  51  is loaded in a circuit board  52  and constructs an illumination unit  50  together with the circuit board  52 . 
     Light provided from the LED  51  is totally reflected into the light guide plate  20 , is transferred in right direction, is projected on a top surface of the light guide plate  20 , i.e., on a light projection plane, and then provides an illumination to the 3D member  10 . Therefore, it is able to provide a fancy visual effect. 
     Referring to  FIG. 6  ( b ), the light guide plate  20  is extended under the housing  102  in part, unlike  FIG. 6  ( a ). In particular, the light guide plate  20  can be loaded in a manner that one end portion of the light guide plate  20  is extended by an insertion depth d into the housing  102 . 
     As the light guide plate  20  is loaded in a manner of being extended toward the housing  102 , an installation position of the LED  51  constructing the illumination unit  50  is further deepened into the housing  102  as well. 
     According to the example shown in  FIG. 6  ( a ), in which the LED  51  is provided to a boundary region of the opening, if the LED  51  is turned on, brightness deviation of the 3D member  10  may become considerable due to a brightness difference of the LED  51 . In particular, the light provided by the LED  51  is projected in a slightly slanting direction without experiencing total reflection within the light guide plate  20 , whereby uniformity of the brightness may be degraded. Referring to  FIG. 6  ( b ), the light guide plate  20  is extended toward the housing  102  and the LED  51  is arranged within the housing  102 , whereby the brightness deviation at a left end portion of the 3D member  10  can be minimized. Particularly, in the overlapped area between the light guide plate  20  and the housing  102 , the housing  102  plays a role as a cover amounting to the insertion depth d of the light guide plate  20  in blocking the light directly projected from the LED  51 . 
       FIG. 6  ( c ) differs from  FIG. 6  ( a ) in that the light guide plate  20  has a thickness inverse proportional to a distance from the LED  51 . 
     In particular, a reduced light intensity is compensated by gradually reducing the thickness of the light guide plate  20 , whereby the deviation of the brightness of the illumination provided by the #d member  10  can be minimized. 
     The thickness of the light guide plate  20  is set to t1 at a left end portion, while the thickness of the light guide plate  20  is set to t2 (t1&gt;t2) at a right end portion.  FIG. 6  ( c ) shows an example that the thickness of the light guide plate  20  gradually decreases from the beginning to the end, by which the present invention is non-limited. If there a thickness variation in a partial section, the same effect can be obtained in part. 
       FIG. 6  ( d ) differs from  FIG. 6  ( a ) in that a reflective plate  30  is further provided under the light guide plate  20 . The illumination effect is provided in a manner that the light diffuses in part in the course of total reflection within the light guide plate  20  to be projected to a light projection plane. Yet, since the light projection may occur on a bottom surface of the light guide plate  20 , the reflective plate  30  can be provided to supply the meaninglessly diffusing light, which is projected via the bottom surface of the light guide plate  20 , into the light guide plate  20  in a manner that the diffusing light is reflected again on the reflective plate  30 . 
     The reflective plate  30  can be provided as such a sheet as a film and the like. Alternatively, the reflective plate  30  can be provided in a manner that the bottom surface of the light guide plate  20  is directly coated with the reflective material. 
     Each of the above examples described with reference to  FIGS. 6  ( a ) to  6  ( d ) has individual features based on the example shown in  FIG. 6  ( a ). In particular, the features disclosed in  FIGS. 6  ( b ) to  6  ( c ) can be individually adopted. And, it is apparent that two or three of the features are applicable to the mobile terminal to reduce the brightness deviation of the illumination on the top face of the 3D member  10  or increase overall brightness thereof. 
       FIG. 7  is a diagram for describing how a mobile terminal according to another embodiment of the present invention operates. In particular,  FIG. 7  ( a ) shows a state that the 3D member  10  is loaded in the rear housing  102  configuring the backside of the mobile terminal  100  and a state that the LED  51  of the illumination unit configured to provide an illumination function is turned off. And,  FIG. 7  ( b ) shows a state that the 3D member  10  is loaded in the rear housing  102  configuring the backside of the mobile terminal  100  and a state that the LED  51  of the illumination unit configured to provide an illumination function is turned on. The redundant descriptions with reference to  FIGS. 2 to 6  shall be omitted from the following description. 
     The present embodiment shown in  FIG. 7  differs from the former embodiment shown in  FIG. 5  in that a depositing member  40  is additionally provided on the 3D member  10  loaded in the rear housing  102  configuring the backside of the mobile terminal  100 . 
     The depositing member  40  performs metallic deposition processing on a film or plate of a light-transmittive material to vary whether observation is possible according to brightness of an object under the depositing member  40 . 
     Referring to  FIG. 7  ( a ), while the Led configuring the illumination unit is turned off, a pattern or the like of the 3D member  10  located underneath is not observed well. Referring to  FIG. 7  ( b ), while the LED configuring the illumination unit is turned on, the pattern  15   b  of the specific shape provided to the 3D member  10  can be observed despite the presence of the depositing member. 
     In particular, while the LED is turned off, it is able to obtain a mirror effect as if there exists a mirror. While the LED is turned on, a fancy design of the pattern is observed to provide a user with fancy feeling. 
       FIG. 8  is a diagram of various examples of a cross-sectional diagram of the mobile terminal shown in  FIG. 7 . In the following description, the redundant part of the description with reference to  FIG. 6  is omitted. 
     Referring to  FIG. 8 , the depositing member  40  is arranged over the 3D member  10 . The depositing member  40  can include a separate member. Alternatively, the top surface of the 3D member  10  can be directly coated with the depositing member  40 . Examples shown in  FIG. 8  are based on  FIG. 8  ( a ). And, the examples shown in  FIGS. 8  ( b ) to  8  ( d ) include individual features, respectively. Examples for combining at least two of the features are not shown in  FIG. 8 . Yet, on the assumption of the structure shown in  FIG. 8  ( a ), two or three of the features are adopted and applied to one mobile terminal to reduce deviation of brightness of the illumination on the top surface or increase overall brightness. This is as good as the former examples shown in  FIG. 6 . 
       FIG. 9  is a layout of a bottom surface of a light guide plate (LGP) loaded in a mobile terminal according to one embodiment of the present invention. 
     Referring to  FIG. 9 , a plurality of light extracting patterns can be provided to a top or bottom surface of the light guide plate  20 . The light extracting patterns mean microgrooves, microscratches or the like to artificially control brightness of an illumination by the light guide plate  20  in a manner of artificial image formation of propagating light. 
     Density of the light extracting patterns can be formed on the top or bottom surface of the light guide plate  20  in proportion to a distance from the LED  51 . 
     In particular, the light extracting patterns can be formed on the bottom or top surface of the light guide plate  20 . Density of the light extracting patterns is raised in a relatively dark area but is lowered in a relatively bright area or the light extracting patterns are omitted from the relatively bright area. 
     Referring to  FIG. 9 , the bottom surface of the light guide plate  20  is divided into a left plane p 1  and a right plane p 2  by a partitioning line  1  vertical to a light propagating direction. In this case, the partitioning line  1  is a virtual partitioning line for clarity and convenience of the description but is not actually marked on the light guide plate  20 . 
     The pattern density of the right plane p 2  farther from the LED  51  than the left plane p 1  needs to be overall raised higher than that of the left plane p 1 . And, the density of the light extracting patterns can gradually increase if it gets farther from the LED  51 . 
     In the description of  FIG. 6  ( c ), the thickness of the light guide plate  20  is gradually reduced. Likewise, the pattern density can be raised to prevent the brightness from being lowered if the distance from the LED  51  increases. A third region p 3  within the right plane p 2  can be regarded as a region in which the density gradually increases. 
     The overall pattern formation of the example shown in  FIG. 9  ( b ) is as good as that shown in  FIG. 9  ( a ). Yet, density of the patterns in a plurality of spaced regions p 4  corresponding to a region, in which a plurality of the LEDs  51  spaced apart from each other, among the adjacent regions of the LEDs  51  in the left plane p 1  is locally raised. 
     Although the spaced region p 4  is close to the LED  51 , it exists between the light incident regions to become a relatively dark region. Therefore, although the absolute brightness is not dark, it is able to raise the pattern density in the vicinity of the LED  51  in order to reduce the brightness deviation that may be generated from spacing a plurality of the LEDs  51  apart from each other. 
     Thus, by the method of forming the patterns on the top or bottom surface of the light guide plate  20 , the method of gradually reducing the thickness of the light guide plate  20  or the method of providing the reflective plate or the like, it is able to raise the brightness of the illumination provided to the 3D member  10  or minimize the brightness deviation. 
       FIG. 10  is a perspective diagram of a mobile terminal according to a further embodiment of the present invention. 
     Referring to  FIG. 10 , a mobile terminal according to a further embodiment of the present invention includes a first body  100 A having a display unit  151  and a first cover  100 A-c enclosing a side opposing the display unit  151 , a second body  100 B having at least one user input unit  131  and a second cover  100 B-c enclosing a side opposing the at least one user input unit  131 , the second body  100 B configured to be rotatably or slidably combined with the first body  100 A, a 3D member  10  having a lens sheet and a transparent sheet, and a light source unit (not shown in the drawing) having a light guide plate (not shown in the drawing) provided under the 3D member  10  and at least one LED provided to a lateral side of the light guide plate. In this case, convex lenses provided to a whole or partial region of at least one of the first cover  100 A-c and the second cover  100 B-c are arranged in a grid form on the lens sheet. And, a pattern of a specific shape is printed on a bottom surface of the transparent sheet that is provided under the lens sheet. 
     According to the embodiment shown in  FIG. 10 , the first cover  100 A-c or the second cover  100 B-c is substituted for one 3D member  10 . 
     According to the embodiment shown in  FIG. 10 , a mobile terminal of a folder type is shown in stead of the former full-touch mobile terminal of the bar type described with reference to  FIGS. 2 to 8 . In the mobile terminal shown in  FIG. 10 , the first body  100 A having the display unit  151  and the second body  100 B having the at least one user input unit  131  are hinged on each other. Optionally, the first and second bodies  100 A and  100 B can be slidably combined together using a slide hinge. 
     Thus, even if the first and second bodies  100 A and  100 B are displaceably combined with each other, the 3D member  10  is provided to at least one of a backside of the surface having the display unit  151  provided thereto and a backside of the surface having the user input unit  131  provided thereto, whereby an exterior with a 3D effect can be provided. 
     Moreover, a fancier 3D effect can be provided in a manner of loading LED and the like in the 3D member to provide an illumination effect thereto. 
     As mentioned in the foregoing description, instead of forming an opening to a housing configured to construct an exterior of a mobile terminal, an externally exposed part can be fabricated as a single cover. 
     In the foregoing description, embodiments for providing the loaded member  10  and the like to the exterior of the mobile terminal are explained. In the following description, embodiments for providing a loaded member and the like to a user input unit of a mobile terminal are explained with reference to  FIG. 11  and the like. In the description of the following embodiments, the loaded member is indicated by a reference number  210  or  310  to be discriminated from the former loaded member. 
     In the following description, for clarity, a slider type mobile terminal is selected for example from mobile terminals of various types including a folder type, a bar type, a swing type, a slider type and the like. Therefore, the present invention is non-limited by the slider type mobile terminal but is applicable to mobile terminals of all types including the above-mentioned types. Despite the difference in type, the redundant description between the bar type mentioned in the foregoing description and the folder type is omitted from the following description. 
       FIG. 11  is a front perspective diagram of a mobile terminal according to a further embodiment of the present invention. 
     Referring to  FIG. 11 , a mobile terminal  100  according to a further embodiment of the present invention includes a display unit  151 , a user input unit  200 / 300  including a 3D member  210  having a lens sheet  211  shown in  FIG. 15  and a transparent sheet  213  shown in  FIG. 15  provided under the lens sheet  211  and a circuit board (not shown in the drawing) having a plurality of touch sensors or a plurality of dome switches, the circuit board provided under the 3D member  210 , and a controller detecting a user input inputted via the user input unit  200 / 300 , the controller controlling the display unit  151 . In this case, convex lenses are arranged in a grid form on the lens sheet  211 . And, a pattern of a specific shape is printed on a bottom surface of the transparent sheet  213 . 
     The mobile terminal  100  according to the present invention includes a first body  100 A and a second body  100 B configured slidable on the first body  100 A along at least one direction. 
     If the first body  100 A is arranged in a manner of being superposed on the second body  100 B, it can be named a closed configuration. If the first body  100 A is configured to expose at least one portion of the second body  100 B, it can be named an open configuration. 
     In the closed configuration, the mobile terminal is mainly operable in a standby mode. And, the standby mode can be released by user&#39;s manipulation. In the open configuration, the mobile terminal is mainly operable in a call mode or the like. According to user&#39;s manipulation or expiration of prescribed duration, a mode of the mobile terminal can be switched to the standby mode. 
     A case (e.g., casing, housing, cover, etc.) forming an exterior of the first body  100 A includes a first front case  100 A- 1  and a first rear case  100 A- 2 . Various electric and/or electronic parts are loaded in a space provided by the first front case  100 A- 1  and the first rear case  100 A- 2 . And, at least one or more middle cases can be additionally provided between the first front case  100 A- 1  and the first rear case  100 A- 2 . 
     A display module  151 , a first audio output module  152 - 1 , a first camera module  121 - 1  and a first user input unit  120  can be provided to the first body  100 A, and more particularly, to the first front case  100 A- 1 . 
     The first user input unit  200  can be provided as a touchpad  200  capable of detecting a user&#39;s touch input and then converting the detected touch input to a touch signal. Regarding the touchpad  200 , a circuit board provided with a touch sensor is partitioned into a plurality of touch zones. If a user&#39;s touch input is detected, the touchpad  200  generates a control signal corresponding to the touch zone to control the mobile terminal. Alternatively, like a second user input unit  300  in the following description, the first user input unit  200  includes a dome switch substituted for the touch sensor and is able to generate an input signal by pressurization. 
     The first user input unit  200  shown in  FIG. 11  includes a 3D member  210  having a lens sheet  211  shown in  FIG. 15  and a transparent sheet  213  in  FIG. 15  provided under the lens sheet  211  and a circuit board (not shown in the drawing) having a plurality of touch sensors or a plurality of dome switches to be provided under the 3D member  210 . In this case, convex lenses are arranged in a grid form on the lens sheet  211  and a pattern of a specific shape is printed on a bottom surface of the transparent sheet  213 . 
     Preferably, the 3D member  210  can be provided to give a 3D effect to the first user input unit  200 . 
     The display module  151  includes at least one of devices for representing information visually. In this case, the display module  151  includes a liquid crystal display (LCD), an organic light emitting diode (OLED) display and/or the like. 
     A touchpad is superposed onto the display module  151  to configure a layered structure. Therefore, the display module  151  can operate as a touchscreen to enable information to be inputted by a touch made by a user. 
     The first audio output module  152 - 1  can be implemented as a receiver or a speaker. 
     The first camera module  121 - 1  can be implemented suitable for photographing an image or video of a user and the like. 
     Like the first body  100 A, a case forming an exterior of the second body  100 B includes a second front case  100 B- 1  and a second rear case  100 B- 2 . 
     And, a second user input unit  300  can be provided to the second body  100 B, and more particularly, to a front face of the second front case  100 B- 1 . 
     Like the first user input unit  200 , the second user input unit  300  includes a 3D member  310  having a lens sheet and a transparent sheet provided under the lens sheet and a circuit board (not shown in the drawing) having a plurality of touch sensors or a plurality of dome switches to be provided under the 3D member  310 . In this case, convex lenses are arranged in a grid form on the lens sheet and a pattern of a specific shape is printed on a bottom surface of the transparent sheet. 
     And, a third user input unit  400 , a microphone module  122  and an interface unit  170  can be provided to at least one of the second front case  100 B- 1  and the second rear case  100 B- 2 . 
     The first to third user input units  200 ,  300  and  400  can be generally called a user input unit  130 . And, the user input unit can adopt any tactile manner that enables a user to perform manipulation with tactile feeling. 
     For instance, as mentioned in the foregoing description, the first user input unit  200  is provided as a touchpad  200 . And, each of the second and third user input units  300  and  400  can be provided as a touchpad as well as the first user input unit  200 . 
     For instance, it is able to implement the user input unit  130  with a dome switch or a touchpad, which can receive an input of a command or information by user&#39;s push or touch manipulation. Alternatively, the user input unit  130  can be implemented by such a manipulating system as a key rotating wheel, a jog, a joystick and the like. 
     In aspect of functionality, the first user input unit  200  is provided to input such a command as start, end, scroll and the like. And, the second user input unit  300  is provided to input numerals, characters, symbols and the like. 
     Moreover, the third user input unit  400  can work as a hot-key for activating a special function within the mobile terminal. 
     The microphone module  122  can be implemented into a form suitable for receiving an input of user&#39;s speech and other sounds. 
     The interface unit  170  becomes a passage for enabling the mobile terminal of the present invention to perform data exchange with an external device and the like. For instance, the interface unit  170  can include at least one of a connection terminal for connection to an earphone by wire or wireless, a port for short range communication (e.g., IrDA port, Bluetooth port, wireless LAN port, etc.) and power supply terminals for supplying power to the mobile terminal. 
     Since the interface unit  170  is explained in the foregoing description, its details are omitted from the following description. 
     The power supply unit  190  for supplying power to the mobile terminal is provided to the second rear case  100 B- 2 . 
     In this case, the power supply unit  190  can be detachably provided as a rechargeable battery to the second rear case  100 B- 2 . 
       FIG. 12  is a perspective diagram for a backside configuration of the mobile terminal shown in  FIG. 11 . 
     Referring to  FIG. 12 , a second camera module  121 - 2  can be additionally provided to a backside of the second rear case  100 B- 2  of the second body  100 B. The second camera module  121 - 2  has a photographing direction substantially opposite to that of the first camera module  121 - 1  shown in  FIG. 11  and can have pixels different from those of the first camera module  121 - 1  shown in  FIG. 11 . 
     For instance, the first camera module  121 - 1  has low pixels enough for taking a picture of user&#39;s face and then transmitting the taken picture to a correspondent party in the course of a video call or the like. On the contrary, the second camera module  121 - 2  takes a picture of a subject but does not transmit the taken picture in general. Therefore, the second camera module  121 - 1  preferably has high pixels. 
     In the vicinity of the second camera module  121 - 2 , a flash  121 - 3  and a mirror  121 - 4  can be additionally arranged. In case of taking a picture of a subject using the second camera module  121 - 2 , the flash  121 - 3  shines light toward the subject. In case that a user attempts to take a picture of herself/himself using the second camera module  121 - 2  (i.e., self-photographing), the mirror  121 - 4  enables user&#39;s face to be reflected thereon. 
     A second audio output module  152 - 2  can be additionally provided to the second rear case  100 B- 2 . 
     The second audio output module  152 - 2  can implement a stereo function together with the first audio output module  152 - 1  shown in  FIG. 11  and is usable for a call in speakerphone mode. 
     A broadcast signal receiving antenna  111 - 1  can be provided to one side of the second rear case  100 B- 2  as well as an antenna for communication and the like. In this case, the broadcast signal receiving antenna  111 - 1  can be provided retractable from the second body  100 B. 
     One portion of a slide module  100 C configured to enable the first and second bodies  100 A and  100 B to be slidably assembled together can be provided to the first rear case  100 A- 2  of the first body  100 A. 
     The other portion of the slide module  100 C is provided to the second front case  100 B- 1  of the second body  100 B, thereby avoiding being externally exposed as shown in the present drawing. 
     In the above description so far, the second camera module  121 - 2  and the like are provided to the second body  100 B, by which the present invention is non-limited. 
     For instance, at least one of the components  111 - 1 ,  121 - 2 ,  121 - 3  and  152 - 2  provided to the second rear case  100 B- 2  like the second camera module  121 - 2  can be provided to the first body  100 A, and more particularly, to the first rear case  100 A- 2 . 
     If so, it is advantageous in that the component(s) provided to the first rear case  100 A- 2  in the closed configuration can be protected by the second body  100 B. Moreover, even if the second camera module  121 - 2  is not separately provided, the first camera module  121 - 1  is configured rotatable so as to cover a photographing direction of the second camera module  121 - 2 . 
       FIG. 13  is a layout of the first user input unit of the mobile terminal shown in  FIG. 11 . In particular,  FIG. 13  ( a ) is a layout of LED configuring an illumination unit provided under the 3D member  310 , in which the LED is turned off. And,  FIG. 13  ( b ) is a layout of LED configuring an illumination unit provided under the 3D member  310 , in which the LED is turned on. 
     Referring to  FIG. 13 , a top surface of the first user input unit  200  can include the 3D member  210 . Therefore, the first user input unit  200  can obtain various 3D effects. While the LED is not activated, it is unable to observe an identity symbol, a character and the like in the first user input unit  200  [ FIG. 13  ( a )]. But, it is able to observe a pattern  215   b  of a specific shape displayed under the 3D member  210  only. 
     Referring to  FIG. 13  ( b ), if the LED provided under the first user input unit  200  is activated, each identity display emits light. 
     Therefore, according to whether the LED is activated, the identity display for displaying a type of each user input can be displayed. 
     As mentioned in the foregoing description, the first user input unit  200  can include a touchpad. In this case, the touchpad detects a user&#39;s touch input and then converts the detected touch input to a touch signal. 
     The above configured first user input unit  200  is applicable not only to the mobile terminal but also to various electronic products widely. 
     Meanwhile, the 3D member  210  comes into direct contact with a user&#39;s finger and the like and is configured to be externally exposed. Moreover, the 3D member  210  can be formed of a light-transmittive plastic, resin or the like. 
     The 3D member  210  shown in  FIG. 13  is used as a user input unit for inputting a control signal to a mobile terminal. And, the 3D member  210  is provided to input such a control signal as start, end, scroll, camera mode switching and the like. Therefore, the 3D member can be modified in various ways according to a usage, location and the like of an electronic product to which the first user input unit  200  according to the present invention is applied. 
     According to the embodiment shown in  FIG. 13 , the 3D member  210  is capable of receiving a plurality of control signals. For instance, referring to  FIG. 13 , a control signal for a start or end of a call can generate various controls signals according to positions of a part for receiving each touch input. 
     In particular, the first user input unit  200  according to the present invention is able to generate each individual control signal according to a partitioned touch zone  253  of a circuit board  250  explained in the following description with reference to  FIG. 14 . A partition line  255  shown in  FIG. 14  is not substantially visible but is understood as a partition line for partitioning the 3D member  210  into each corresponding touch zone  253 . 
     Moreover, the first user input unit  200  shown in  FIG. 13  can be configured to enable total 9 different touch inputs. 
     In the following description, a configuration of the first user input unit  200  according to the present invention is explained with reference to  FIG. 14 . 
       FIG. 14  is an exploded perspective diagram of the first user input unit of the mobile terminal shown in  FIG. 11 . 
     Referring to  FIG. 14  ( a ), the 3D member  210  is provided to a most upper part of the first user input unit  200 . And, a transmittive film  220  can be provided under the 3D member  210 . 
     In this case, the transmittive film  220  can be provided with a plurality of light transmittive portions  221  for selectively transmitting light. If the LED  251  is activated, identity symbols used to be invisible start to emit lights, respectively, as shown in  FIG. 13  ( b ). 
     Thus, in order to enable an identity symbol corresponding to each user input to selectively emit light, the transmittive film  220  is provided. 
     A region of the transmittive film  220  except the portion corresponding to the identity symbol (or the light transmittive portion  221 ) can be coated with a light-blocking material. 
     Alternatively, in order to enable the identity symbol to selectively emit light, instead of using a separate transmittive film, a bottom surface of the 3D member  210  can be directly coated with a prescribed material. 
     In particular, the portion corresponding to the identity symbol, i.e., the light transmittive portion  221  is not coated with a coating material but the rest of portions are coated with the coating material, whereby light can be selectively transmitted. The latter method is advantageous in reducing a thickness of the user input unit. 
     A rubber board  240  can be further provided under the transmittive film  220 . In particular, the rubber board  240  can be further provided between the 3D member  210  and the circuit board  250 . In this case, a plurality of openings  241  is formed on the rubber board  240  to be penetrated by the LED  251 . 
     A plurality of the openings  241  are provided to the rubber board  240  to enable the LED  251  to loaded therein. And, the tuber board  240  can be formed of a material having prescribed elasticity. 
     Moreover, the rubber board  240  can includes an adhesive material. If both faces of the rubber board  240  are coated with an adhesive material, it is able to enable the circuit board  250  and the member on the rubber board  240  to adhere strongly thereto. 
     The rubber board includes the opening  241  to transfer the light emitted from the LED  251  upward. 
     The LED  251  loaded on the circuit board  250  is inserted in the opening  241  so that a top side of the LED  251  can be externally exposed. 
     Preferably, the opening  241  provided to the rubber board  240  has a size corresponding to that of the LED  251 . In particular, the size of the opening  241  is determined to enable the top side of the LED  251  to be externally exposed. 
     A shape of the opening  241  can correspond to that of the LED  251  loaded on the circuit board  250 . 
     The rubber board  240  plays a role in eliminating a recess between the LED loaded circuit board  250  and the 3D member  210  or the transmittive film  220 , which is provided on the rubber board  240 , and also plays a role in attaching the 3D member  210  or the transmittive film  220 , which is provided on the rubber board  240 , and the circuit board  250  to each other. 
     The LED  251  loaded on the circuit board  250  is projected from the circuit board  250  with a predetermined height. 
     Therefore, if the rubber board  240  does not exist, the recess may be generated due to the LED  251 . To eliminate the recess, the rubber board  240  can be provided in addition. 
     As mentioned in the foregoing description, the circuit board  250  having a plurality of the LEDs  251  loaded thereon can be provided under the rubber board  240 . 
     The circuit board  250  includes a plurality of touch zones  253  to which a plurality of touch sensors (not shown in the drawing) for receiving user&#39;s touch inputs and then converting the received touch inputs to touch signals are provided, respectively. And, a plurality of the LEDs  251  is loaded on a plurality of the touch zones  253 , respectively. 
     In this case, each of the touch sensors can include a capacitive touch sensor. Particularly, the capacitive touch sensor operates by detecting a variation of capacitance generated if coming into contact with a human body or a specific object. The touch sensor detects a difference between a setup value and a small capacitance, which is generated from a contact between the human body and a touch surface, and then outputs the difference finally. 
     One of various sensors capable of detecting a user&#39;s touch input and generating a corresponding touch signal can be used as touch sensor as well as the capacitive touch sensor. 
     As mentioned in the foregoing description, the touch zone  253  is a partitioned zone of the circuit board  250  corresponding to a touch input zone  212  of the 3D member  210 . Each of the touch zones  253  is able to generate a control signal according to a corresponding touch input. 
     The LED  251  can be loaded on each of the touch zones  253  provided to the circuit board  250 . In this case, when the LED  251  can be controlled to emit light if a touch signal is generated from receiving a touch input via the touch zone  253 . 
     A plurality of the LEDs  251  can be controlled in a manner that the corresponding LED  251  loaded on the touch zone  253  having the touch input applied thereto is set to emit light only. Alternatively, a plurality of the LEDs  251  can be controlled in a manner that the rest of the LEDs  251  are set to emit lights sequentially or together with the LED  251  loaded on the touch zone  253  having the touch input applied thereto. Thus, the light emitting pattern or mechanism of the LED  251  can be diversely modified. 
     In case that the LED except the LED  251  loaded on the touch input applied touch zone  253  is also turned on, it is preferable that the LED  251  loaded on the touch input applied touch zone  253  is first turned on. This is to facilitate a user to determine whether a touch signal is generated from a specific touch zone. 
     Optionally, when the turned-on LED is turned off, the LED can be controlled to dim its light gradually. 
     The first user input unit  200  shown in  FIG. 14  ( b ) can further include a diffusing member  230 . 
     According to the embodiment shown in  FIG. 14  ( b ), the diffusing member  230  is further provided between the transmittive film  220  or the 3D member  210  and the rubber board  240 . 
     In this case, the diffusing member  230  includes a plurality of diffusing portions  231  and a shield portion  233  except the diffusing portions  231 . 
     The light diffusing portion of the diffusing member  230 , i.e., the diffusing portion  231  can be formed of such a semi-transparent material as plastic and the like. If the diffusing portion  231  is formed of ABS resin, to which pigment or the like is added, light transmitted via the diffusing member  230  diffuses into the identity symbol  221  of the transmittive film  220  with uniform brightness. Hence, in case of observing the first user input unit  200  above the 3D member  210 , it is able to obtain a uniform illumination effect. 
     The diffusing member  230  enables the light emitted from the LED  251  to smoothly diffuse and is able to play a role in enhancing uniformity of the emitted light at the identity symbol  221  irrespective of a size of the LED  251 . 
     The characters or symbols printed or coated on the bottom surface of the 3D member  210  or the characters or symbols printed on the separate transmittive film  220  can have various shapes. Since a size of the LED  251  provided under the character or symbol, e.g., a size of an LED device fails to precisely match a position or size of the shape or size of the corresponding character or symbol, the diffusing member  230  is necessary to enable the identity symbol  221 , which includes the corresponding character or symbol of the 3D member  210 , to uniformly emit light in case of light emission of the LED  251 . 
     As the illumination of one identity symbol  221  becomes uniform, the diffusing member  230  is able to play a role in enhancing a quality of illumination. 
     Moreover, the diffusing member  230  shown in  FIG. 14  includes the diffusing portion  231  and the shield portion  233  for cutting of the light transmission. The shield portion  233  cuts off the interference of the lights provided by the LEDs  251 , thereby enabling the corresponding identity symbol to emit light selectively. 
     In this case, the rubber board  240  eliminates the recess existing between the circuit board  250  and the diffusing member  230  and enables the circuit board  250  and the diffusing member  230  to be attached thereto. 
     As mentioned in the foregoing description, the diffusing member  230  enables the light to diffuse smoothly and the diffusing portion  231  or the shield portion  233  selectively cuts off or transmits the light to play a role in preventing the lights, which are generated from the LEDs  251  provided to the touch zones  253  by being spaced apart from each other, from interfering with each other. 
     The diffusing portion  231  is a region for diffusing or transmitting light, while the shield portion  233  is a peripheral region of the diffusing portion to cut off the diffusion of light. 
     In case that the LED  251  provided on the circuit board  250  emits light, the identity symbol  221  of the transmittive film  220  or the 3D member  210  in the touch input applied touch input zone in the 3D member  210  can emit light only. 
     Therefore, the shield portion  233  provided between the diffusing portions  231  of the diffusing member  230  prevents the light, which is emitted from the LED  251  loaded in the specific touch zone  253 , from being supplied to the identity symbol  221  on another touch zone  253 . 
     Although a touch input is applied to a specific touch input zone  212 , if the light emitted from the LED  251  is emitted via the identity symbol  221  of the transmittive film  220 , it is unable to check whether the touch input is correctly applied via the illumination function. 
     Therefore, the shield portion  233  can be provided to selectively cut off the light emitted from the LED  251 . In this case, the shield portion  233  can be a portion of the diffusing member  230  coated with a shield material (e.g., paint) to prevent the light from being transmitted. 
     Optionally, the shield portion of the diffusing member  230  can be formed of a material for preventing light from being transmitted. 
       FIG. 15  is a cross-sectional diagram of the first user input unit of the mobile terminal shown in  FIG. 11 . Redundant description of the parts shown in  FIG. 14  shall be omitted from the following description. 
     Referring to  FIG. 15 , the circuit board is partitioned into a plurality of touch zones. And, each of the touch zones  253 ( 1 ),  253 ( 2 ) and  253 ( 3 ) can be provided with a touch sensor. In particular, an independent touch sensor is loaded in each of the touch zones  253 ( 1 ),  253 ( 2 ) and  253 ( 3 ) of the first user input unit  200  shown in  FIG. 14 . After each of the independent touch sensors has been connected to a touch control unit  800 , if a touch input is applied, it is able to generate a touch signal. 
     The touch control unit  800  forwards the touch signal to an LED control unit  700  configured to control the LED  251  to be turned on/off. Subsequently, the LED control unit  700  controls the LED  251  provided to each of the touch zones  253 ( 1 ),  253 ( 2 ) and  253 ( 3 ). 
     In case that the touch sensor of the circuit board  250  detects a touch input, the LED control unit  700  is able to control the LED  251  to be turned on/off. For instance, in case that the touch sensor of the circuit board  250  detects a touch input, the LED control unit  700  is able to activate the corresponding LED  251 . 
     For clarity and convenience, the above description is made in a manner of discriminating the touch control unit  800  playing a role in receiving a touch input and then generating a control signal corresponding to the received touch input from the LED control unit  700  for controlling the LED  251  to be turned on/off. Alternatively, the controller  180  shown in  FIG. 1  receives a touch input and is then able to control the LED  251  to be turned on/off. 
     The touch control unit  800  detects a touch signal applied to a specific touch zone  253  from the touch sensor (not shown in the drawing) loaded in each of the partitioned touch zones  253  of the circuit board  250 . 
     Therefore, the LED control unit  700  is able to control the LED  251 , which is loaded in the corresponding touch zone  253 , to be turned on or off by a preset mechanism according to the touch signal. 
     For instance, if the touch sensor detects the touch input to the specific touch zone  253 , the touch control unit  800  generates a touch signal of the specific touch zone  253  and then forwards the touch signal to the LED control unit  700 . The LED control unit  700  then turns on the LED  251  corresponding to the corresponding touch zone  253  only or is able to turn on all of the LEDs  251 . 
     As mentioned in the foregoing description, the transmittive film  220  can be provided under the 3D member  210 . And, the diffusing member  230  can be provided to diffuse the light emitted from the LED  251 . 
     A size of the diffusing portion  231  can be set enough to cover the whole identity symbol  221 . The shield portion  233  cut off the light supplied from the LED  251  in order for the light not to be supplied to the transmittive hole of the touch input zone  212  over another touch zone  253 . 
     The rubber board  240  is provided between the diffusing member  230  and the circuit board  250  having the LED  251  loaded thereon to attach the diffusing member  230  and the circuit board  250  thereto. The rubber board  240  is configured to enclose a lateral side of the LED  251  and includes an opening  241  configured to enable a top side of the LED  251  to be exposed toward the diffusing portion  231  of the diffusing member  230 . 
     The rubber board  240  including the opening  241  prevents the light, which is supplied from the LED  251 , from leaking toward a lateral side of the LED  251  while the LED  251  is loaded in the opening  241 . And, the rubber board  240  also plays a role in eliminating a recess that may be generated by the LED  251  or enabling the circuit board  250  and the diffusing member  230  to closely adhere or attach to each other. 
       FIG. 16  is a layout of the second user input unit of the mobile terminal shown in  FIG. 11 . 
     Referring to  FIG. 16 , like the first user input unit  200 , the second user input unit  300  includes a 3D member  310  provided to its most upper part. Yet, the second user input unit  300  differs from the first user input unit  200  in that an identity symbol, character or numeral  315   a  is printed on a transparent sheet (not shown in the drawing) configuring the 3D member  310  together with a pattern  315   b.    
     Referring to  FIG. 16  ( b ), if an LED  390  configured to supply light via a light guide film is turned on, the identity symbol, character or numeral  315   a  can provide a 3D effect as well as a fancy look. 
       FIG. 17  is an exploded perspective diagram of the second user input unit of the mobile terminal shown in  FIG. 11 . 
     In particular,  FIG. 17  ( a ) is a perspective diagram for an exploded configuration of the second user input unit  300 , which is viewed from a top side. And,  FIG. 17  ( b ) is a perspective diagram for an exploded configuration of the second user input unit  300 , which is viewed from a bottom side. 
     First of all, the second user input unit  300  is provided in a manner that a 3D member  310 , a light guide film  350 , a circuit board  370  having a dome switch  373  and an electrode part  377  and the like are stacked on one another. 
     As mentioned in the foregoing description, the 3D member  310  includes a lens sheet  311  and a transparent sheet  313  provided under the lens sheet  311 . In this case, convex lenses are arranged in a grid form on the lens sheet  311 . And, a pattern of a specific shape is printed on a bottom surface of the transparent sheet  313 . The redundant details described with reference to  FIG. 4  shall be omitted from the following description. 
     The 3D member  310  is formed of a plastic resin material having prescribed elasticity. Since a thickness of the 3D member  310  is small, in case that a top side of the 3D member  310  is pressurized, the dome switch  373  under the 3D member  310  is pressurized as well to generate an input signal. 
     And, an identity symbol, character or numeral  315   a  and a pattern  315   b  of a specific shape can be printed on a bottom surface of the transparent sheet configuring the 3D member  310 . 
     The redundant details of the 3D member  310 , on which the identity symbol, character or numeral  315   a  and the pattern  315   b  of the specific shape are printed, described with reference to  FIG. 4  shall be omitted from the following description. 
     The user input unit shown in  FIG. 17  is provided with the dome switch  373  to detect a user&#39;s pressurization input, whereas the user input unit shown in one of  FIGS. 13 to 16  is a touchpad type user input unit. 
     In case that a plurality of dome switches  373  are provided to the circuit board  370  of the user input unit  300 , a rubber board  330  can be further provided between the 3D member  310  and the circuit board  370 . In this case, a plurality of projections  331  is formed on a bottom surface of the rubber board  330  to oppose a plurality of the dome switches  373 , respectively. 
     In particular, the rubber board  330  can be provided under the 3D member  310 . A plurality of the projections  331  are projected on the rubber board  330 . In case that a specific zone of the 3D member  310  is pressurized, a corresponding on of a plurality of the projections  331  pressurizes the corresponding dome switch  373 . 
     A light guide film  350  is provided under the rubber board  330 . In this case, a plurality of perforated holes  351  are formed on the light guide film  350  to be penetrated by a plurality of the projections of the rubber board  330 , respectively. And, at least one LED  390  shown in  FIG. 16  can be provided next to a lateral side of the light guide film  350 . 
     Therefore, the projection  331  formed on the rubber board  330  penetrates the perforated hole  351  of the light guide film  351  and then pressurizes the corresponding dome switch  373 . 
     Thus, the light guide film  350  is provided under the rubber board  330 . 
     The light guide film  350  is provided as a film formed of a transparent material. In this case, the transparent material can include one of polycarbonate, polyurethane and the like. 
     If a specific zone of the 3D member  310  is pressurized, the projection  331  for pressurizing the dome switch  373  of the circuit board  370  penetrates the perforated hole  351  formed in the light guide film  350  and is then projected toward the dome switch  373 . 
     If the light guide film  350  is adopted, the number of the LEDs (cf. ‘ 390 ’ in  FIG. 16 ) provided for an illumination function can be considerably reduced and the corresponding thickness can be slimmed as well. If the perforated hole  351  of the light guide film  350  is not provided, a pressurization force, which is generated by pressurizing the 3D member  310 , for pressurizing the dome switch  373  via the projection  331  of the rubber board  330  is weakened. And, a manipulation feel may be degraded. 
     In order to solve the problem of the degraded manipulation feel, in the mobile terminal according to the present invention, the perforated hole  351  is formed at the light guide film  350  adopted to provide the illumination function. In particular, the perforated hole  351  is formed at a location opposing the projection  331 . Hence, the projection  331  penetrates the perforated hole  351  and is then able to pressurize the corresponding dome switch. 
     Meanwhile, the rubber board  330  can be formed of such a soft material as rubber and the like. 
     Preferably, a projected height of the projection  331  is set enough to pressurize the corresponding dome switch  373  without consumption of a considerable force in case of pressurizing the manipulating button  215  of the 3D member  310  after the 3D member  310 , the light guide film  350  and the circuit board  370  have been assembled together. 
     Since the projection  331  needs to selectively pressurize the corresponding dome switch  373  by penetrating the perforated hole  351  of the light guide film  350  provided under the 3D member  310 , it can be formed to have a projected height equal to or greater than a thickness of the light guide film  350 . 
     As mentioned in the foregoing description, the perforated hole  351  formed in the light guide film  350  can have a circular shape, an oval shape or the like. Since the projection  331  can be inserted in a wider part of the perforated hole  351 , a cross-sectional shape of the projection  331  should have a shape that can be inserted in the perforated hole  351 . 
     For instance, the projection  331  can be formed in a cylindrical shape. 
     The projection  331  of the rubber board  330  is located at a position that opposes the perforated hole  351  of the light guide film  350  and the dome switch  373  and the electrode part  377  of the circuit board  370  and is then able to generate a control signal by a contact between the dome switch  373  and the electrode part  377  according to the pressurization of the 3D member  310 . 
     The circuit board  370  can include a board  375  provided with a plurality of electrode parts  377  and an attachment film  371  having the dome switch  373  provided to the position opposing the corresponding electrode part  377  coming into contact with the dome switch  377  if the corresponding electrode part  377  is pressurized. The attachment film  371  provided with the dome switch  373  is attached to the board  375  having the electrode part  377 , thereby constructing a single circuit board  370 . 
       FIG. 18  is a cross-sectional diagram of a second user input unit of the mobile terminal shown in  FIG. 11 . The redundant descriptions with reference to  FIGS. 15 to 17  shall be omitted from the following description. 
     Referring to  FIG. 18 , the second user input unit  300  of the mobile terminal according to the present invention is an input unit configured to input various numerals, characters and/or symbols. And, the numerals, characters and/or symbols can be formed on the bottom surface of the transparent sheet configuring the 3D member  310  together with a pattern of a specific shape. In particular, the pattern of the specific shape printed on the bottom surface of the transparent sheet provides a 3D effect due to an enlargement effect by the lens sheet configuring the top side of the 3D member  310 , thereby implementing diverse visual effects. 
     Under the above configured 3D member  310 , a rubber board  330  having a projection  331  is provided. 
     The projection  331  is projected from a bottom surface of the rubber board  330 . The projection  331  is projected downward in a manner of penetrating a perforated hole  351  of a light guide film  350 . In this case, the light guide film  350  is inserted between the circuit board  370  and the 3D member  310  to provide an illumination function. 
     Therefore, if a specific zone of the 3D member  310  is pressurized, the projection  331  pressurizes the dome switch  373 . The pressurized dome switch  373  selectively comes into contact with an electrode part  377  to generate a control signal. 
     Meanwhile, the light guide film  350  can be formed of a flexible film material. Even if a projected height of the projection  331  is smaller than a thickness of the light guide film  350 , the dome switch  373  can be pressurized with a strong force. Yet, if the projected height of the projection  331  is set greater than the thickness of the light guide film  350 , it is able to enhance user&#39;s feel of manipulation. 
     Thus, since the 3D member  310  is provided over the second user input unit  300 , an identity symbol, character, numeral and/or the like is printed on a position corresponding to a focal distance of the lens sheet. Therefore, it is able to obtain a visual effect as if the identity symbol, character, numeral and/or the like is floating on a pattern of a specific shape. And, an illumination function can be provided as well. 
     Accordingly, the present invention provides the following effects and/or advantages. 
     First of all, the present invention is able to provide a mobile terminal having an exterior and/or user input unit provided with various visual effects including a 3D effect. 
     Secondly, the present invention diversifies designs of a front face, surface housing and/or user input unit of a mobile terminal, thereby enhancing user&#39;s interest and satisfaction. 
     Thirdly, the present invention enables a surface housing and/or user input unit of a mobile terminal to be configured with a 3D effect and also provides an illumination function thereto, thereby further providing the surface housing and/or user input unit with fancy and colorful visual effects. 
     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.