Abstract:
Provided is a multi-functional wireless mouse apparatus. Components for performing various functions as well as a mouse function are added to a wireless mouse and a receiver that is connected to a USB port of a computer to communicate with the wireless mouse. A digital multimedia broadcast receiving unit that can receive a digital multimedia broadcast is provided to the signal receiver. Therefore, it is possible to remove the inconvenience in that one USB port needs to be used for a general USB mouse and another USB port needs to be used for a DMB receiver. In addition, number keys and a dedicated key of which function can be designed by a user are disposed on a surface of the wireless mouse, so that the user can easily change a channel of the digital multimedia broadcast or adjust a volume.

Description:
BACKGROUND 
       [0001]    1. Technical Field 
         [0002]    The present invention relates to a wireless mouse apparatus, and more particularly, to a multi-functional wireless mouse capable of receiving digital multimedia broadcast. 
         [0003]    2. Related Art 
         [0004]    In general, a keyboard and a mouse are used as an apparatus for inputting information to a computer. Recently, due to the development of a graphic user interface technology, a user can input information by using only the mouse. The mouse has been widely used. Much effort for removing inconvenience involved with the mouse has been made. 
         [0005]    A wireless mouse is a representative example for removing the inconvenience. In the case where the user uses a general wired mouse is at the site that is apart from a computer main body by a long distance, the wired mouse cannot be used because of a limitation of a cable. Otherwise, a connection code needs to be used therebetween. In addition, since the wired mouse is connected to the cable, it is inconvenient to use the wired mouse. 
         [0006]    In order to remove the inconvenience, wireless mouse apparatuses have been developed. For a conventional wireless mouse, a receiver for receiving signals generated from the wireless mouse is connected to a USB port. However, the conventional wireless mouse has a problem in that one of USB ports (for example, three or four USB ports) of the computer is always used by the receiver for the wireless mouse. Recently, various electronic apparatuses are connected to the USB ports. 
         [0007]    As examples of the electronic apparatuses, there are a USB memory device, a USB Wibro receiver, a DMB receiver, and the like. However, since the number of USB ports is limited, such electronic apparatuses cannot be used without a limitation. 
       SUMMARY 
       [0008]    The present invention is to provide a multi-functional wireless mouse apparatus where a wireless mouse and various functions such as a DMB receiving function, a USB memory function, and a two-way wireless headphone/microphone function are integrated. 
         [0009]    According to an aspect of the invention, there is provided a multi-functional wireless mouse apparatus comprising: a wireless mouse that transmits a mouse signal including a click signal and a position measuring signal; and a signal receiver that is connected to a computer to receive the mouse signal to output the mouse signal to the computer and to receive a digital multimedia broadcast signal to output the digital multimedia broadcast signal to the computer. 
         [0010]    In the above aspect, the wireless mouse may comprise a key pad including number keys and a plurality of dedicated keys of which functions can be designated by a user and transmits to the signal receiver the mouse signal that further includes a key input signal of the key pad, and when the signal receiver receives the key input signal designating recording or screen-capturing of the digital multimedia broadcast input through one of the dedicated keys, the signal receiver may store the digital multimedia broadcast signal in an internal memory unit or in the computer. 
         [0011]    In addition, the wireless mouse may convert an analog acoustic signal input from a connected microphone to a digital acoustic signal to transmit the digital acoustic signal to the signal receiver, and the wireless mouse may convert the digital acoustic signal received from the signal receiver to an analog acoustic signal to output the analog acoustic signal to a connected speaker. 
         [0012]    In addition, the speaker and the microphone may be embedded inside a housing of the wireless mouse. 
         [0013]    In addition, the wireless mouse may receive an auxiliary mouse signal input from a connected auxiliary mouse and a key input signal input from a connected keyboard to transmit the mouse signal generated from the wireless mouse, the auxiliary mouse signal, and the key input signal to the signal receiver, and the signal receiver may transmit the mouse signal of the wireless mouse received from the wireless mouse together with the auxiliary mouse signal and the key input signal to the computer. 
         [0014]    In addition, the signal receiver may comprise: a multimedia broadcast receiving unit that receives the digital multimedia broadcast signal and decodes the digital multimedia broadcast signal to output an image signal and an acoustic signal; a second transceiving unit that communicates with the wireless mouse; and a receiver control unit that controls functions of the multimedia broadcast receiving unit and transmits the image signal and the acoustic signal of the multimedia broadcast to the computer so that the computer can output the image signal and the acoustic signal, and the wireless mouse may comprise: a position measuring unit that measures a position of the wireless mouse and outputs a position measuring signal; an input unit that generates the click signal and a scroll signal according to user&#39;s manipulation; a first transceiving unit that communicates with the signal receiver; and a mouse control unit that controls the position measuring unit, the input unit, and the first transceiving unit and transmits the mouse signal including the position measuring signal, the click signal, and the scroll signal through the first transceiving unit to the signal receiver. 
         [0015]    In addition, the input unit may further generate a key input signal of a key pad that is provided to the wireless mouse, and the mouse control unit may transmit to the signal receiver the mouse signal that further includes the key input signal. 
         [0016]    In addition, the wireless mouse may further comprise an acoustic signal input/output unit that converts an analog acoustic signal input from a connected microphone to a digital acoustic signal, outputs the digital acoustic signal to the mouse control unit, converts the digital acoustic signal received from the mouse control unit to an analog acoustic signal, and outputs the analog acoustic signal to a connected speaker, and the mouse control unit may output the digital acoustic signal received from the signal receiver to the acoustic signal input/output unit and transmit the digital acoustic signal received from the acoustic signal input/output unit to the signal receiver. 
         [0017]    In addition, the wireless mouse may further comprise a first extension unit that receives an auxiliary mouse signal input from a connected auxiliary mouse and a key input signal input from a connected keyboard to output the signals to the mouse control unit, and the mouse control unit may transmit the auxiliary mouse signal and the key input signal together with the mouse signal generated from the wireless mouse to the signal receiver. 
         [0018]    In addition, the signal receiver may further comprise a second extension unit that connects an external electronic apparatus to the computer through the receiver control unit in a USB or IEEE 1394 scheme. 
         [0019]    In addition, the signal receiver may further comprise a memory unit that stores a driver program of the multi-functional wireless mouse apparatus, and when the signal receiver is connected to the computer, the receiver control unit may check whether or not the driver program is installed in the computer, and if the driver program is not installed, the receiver control unit may transmit the driver program to the computer to install the driver program in the computer. 
         [0020]    In the invention, components for performing various functions as well as a mouse function are added to the wireless mouse and the receiver that is connected to the USB port of the computer to communicate with the wireless mouse. 
         [0021]    In the invention, the digital multimedia broadcast receiving unit that can receive the digital multimedia broadcast is provided to the signal receiver. Therefore, it is possible to remove the inconvenience in that one USB port needs to be used for the general USB mouse and another USB port needs to be used for the DMB receiver. 
         [0022]    In addition, in the invention, number keys and a dedicated key of which function can be designed by the user are disposed on a surface of the wireless mouse, so that the user can easily change a channel of the digital multimedia broadcast or adjust a volume. 
         [0023]    In addition, in the invention, the signal receiver includes a memory unit that can store a driver program or user&#39;s data, so that it can be checked whether or not the driver program is installed every time when the wireless mouse is connected to the computer. If not installed, the driver program is automatically installed, so that it is possible to remove the inconvenience in that a separate program CD for the installation is to be carried. In addition, the user can record or store the digital multimedia broadcast or other required data in the memory unit inside the signal receiver without user&#39;s separately carrying a USB memory device. 
         [0024]    In addition, in the invention, the microphone and the speaker can be connected to the wireless mouse, so that the music and the broadcast can be listened and viewed without any speaker and microphone connected to the computer and the user can record user&#39;s voice. 
         [0025]    In addition, in the invention, the auxiliary mouse and the keyboard can be connected to the wireless mouse, so that the limited number of the USB ports of the computer can be efficiently used in a wireless manner. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0026]    The invention will be described with reference to the accompanying drawings, wherein like numbers reference like elements. 
           [0027]      FIG. 1  is a view showing a multi-functional wireless mouse apparatus according to a first embodiment of the invention. 
           [0028]      FIG. 2  is a detailed block diagram showing a detailed configuration of a signal receiver and a wireless mouse according to the first embodiment of the invention. 
           [0029]      FIG. 3  is a view showing a configuration of a multi-functional wireless mouse apparatus according to a second embodiment of the invention. 
           [0030]      FIG. 4  is a detailed block diagram showing a detailed configuration of a signal receiver and a wireless mouse according to the second embodiment of the invention. 
       
    
    
     DESCRIPTION OF EXEMPLARY EMBODIMENTS 
       [0031]    Hereinafter, exemplary embodiments of the invention will be described with reference to the accompanying drawings. 
         [0032]      FIG. 1  is a view showing a multi-functional wireless mouse apparatus according to a first embodiment of the invention. Referring to  FIG. 1 , the multi-functional wireless mouse apparatus according to the first embodiment of the invention includes a wireless mouse  120  and a signal receiver  110 . 
         [0033]    Similarly to a general wireless mouse, the wireless mouse  120  transmits a mouse input signal to the signal receiver  110 . 
         [0034]    The signal receiver  110  is connected to a desktop computer, a notebook computer, a PDA, or the like (hereinafter, referred to as a computer  130 ) in a USB or IEEE 1394 scheme. The signal receiver  110  receives the mouse input signal from the wireless mouse  120  and decodes the mouse input signal to output the mouse input signal to the computer  130 . In addition, the signal receiver  110  receives a digital multimedia broadcast signal (hereinafter, referred to as a broadcast signal) such as a DMB signal or an 1SEG signal and decodes the digital multimedia broadcast signal to output the digital multimedia broadcast signal to the computer  130 . 
         [0035]    The computer  130  connected to the signal receiver  110  receives the decoded broadcast signal and outputs the decoded broadcast signal to a user. In addition, the computer  130  performs inputting data by using the mouse input signal received from the wireless mouse  120 . 
         [0036]      FIG. 2  is a detailed block diagram showing a detailed configuration of the signal receiver  110  and the wireless mouse  120  according to the first embodiment of the invention. 
         [0037]    Referring to  FIG. 2 , the wireless mouse  120  includes an input unit  122 , a position measuring unit  124 , a first transceiving unit  121 , and a mouse control unit  123 . 
         [0038]    The input unit  122  is constructed with buttons, a wheel, and the like of a general wireless mouse. The input unit  122  receives user&#39;s click and scroll signals to output the signals to the mouse control unit  123 . The position measuring unit  124  measures the motion of the wireless mouse  120  to output a position measuring signal to the mouse control unit  123 . 
         [0039]    In addition, the first transceiving unit  121  wirelessly transmits the button signal, the scroll signal, and the position measuring signal in a predetermined frequency band (in the embodiment of the invention, 2.4 GHz, 5.8 GHz, or the like). The mouse control unit  123  outputs the signals input from the input unit  122  and the position measuring unit  124  to the first transceiving unit  121 . In addition, the mouse control unit  123  controls functions of the input unit  122 , the position measuring unit  124 , and the first transceiving unit  121 . Since the functions of the wireless mouse  120  according to the first embodiment are similar to those of a general wireless mouse, detailed description thereof is omitted. 
         [0040]    In addition, the signal receiver  110  includes a multimedia broadcast receiving unit  111 , a second transceiving unit  112 , an interface unit  114 , and a receiver control unit  11 . The multimedia broadcast receiving unit  111  includes an RF receiving unit  111 - 1 , a signal demodulating unit  111 - 2 , and a signal decoding unit  111 - 3 . 
         [0041]    Firstly, the case where the multimedia broadcast receiving unit  111  receives the DMB broadcast signal is exemplarily described. The multimedia broadcast receiving unit  111  receives a terrestrial DMB broadcast signal or a satellite DMB broadcast signal to output the DMB broadcast signal to the receiver control unit  113 . More specifically, the RF receiving unit  111 - 1  of the multimedia broadcast receiving unit  111  receives user&#39;s selected channel signal among the digital multimedia broadcast signals (multiplexed broadcast signals) broadcasted from a satellite DMB station or a terrestrial DMB station to output the signal to the signal demodulating unit  111 - 2 . 
         [0042]    The signal demodulating unit  111 - 2  converts an analog broadcast signal received from the RF receiving unit  111 - 1  to a digital signal and performs OFDM decoding to output a decoded signal to the signal decoding unit  111 - 3 . 
         [0043]    The signal decoding unit  111 - 3  performs convolution interleaving and RS decoding on the signals received from the signal demodulating unit  111 - 2  to generate an MPEG-2 TS stream. The signal decoding unit  111 - 3  performs demultiplexing the MPEG-2 TS stream. A video signal is decoded according to the H.264 scheme, so that an image signal is output to the receiver control unit  113 . An audio signal is decoded according to the BSAC codex scheme, so that an acoustic signal is output to the receiver control unit  113 . 
         [0044]    The second transceiving unit  112  receives the mouse signal from the wireless mouse  120  in a predetermined frequency band (in the embodiment of the invention, 2.4 GHz, 5.8 GHz, or the like) to output the mouse signal to the receiver control unit  113 . 
         [0045]    The receiver control unit  113  controls the entire functions of the signal receiver  110  to output the image signal and the acoustic signal input from the multimedia broadcast receiving unit  111  through the interface unit  114  to the computer  130 , so that the signals can be displayed to the user. In addition, the receiver control unit  113  transmits the mouse signal input from the second transceiving unit  112  through the interface unit  114  to the computer  130 . 
         [0046]    The interface unit  114  transmits the DMB signal (image signal and acoustic signal) and the mouse signal input from the receiver control unit  113  in the USB or IEEE 1394 scheme to the computer  130 . The interface unit  114  outputs the control signal input from the computer  130  to the receiver control unit  113 . 
         [0047]    Hereinbefore, the multi-functional wireless mouse apparatus according to the first embodiment of the invention is described. According to the multi-functional wireless mouse apparatus of the first embodiment, the wireless mouse function and the multimedia broadcast receiving function can be simultaneously performed by using a single USB or IEEE 1394 port. 
         [0048]      FIG. 3  is a view showing a configuration of a multi-functional wireless mouse apparatus according to a second embodiment of the invention.  FIG. 4  is a detailed functional block diagram of the second embodiment of the invention. The multi-functional wireless mouse apparatus according to the second embodiment further includes an external memory function, a microphone/speaker connecting function, a key pad input function, a digital multimedia broadcast recording function, an auxiliary mouse/keyboard connecting function, and the like as well as the functions of the mouse apparatus according to the first embodiment. 
         [0049]    Referring to  FIGS. 3 and 4 , the wireless mouse  220  according to the second embodiment includes an input unit  222 , a position measuring unit  224 , a first transceiving unit  221 , a mouse control unit  223 , an acoustic signal input/output unit  225 , a first memory unit  226 , and a first extension unit  227 . 
         [0050]    As well as the buttons and the wheel of the general wireless mouse, the input unit  222  is further provided with a key pad  222 - 1  through which the user can easily input numbers and special characters, a dedicated key  222 - 1  through which the user can easily record or screen-capture the digital multimedia broadcast, and an auxiliary key  222 - 2  which the user can use by designating a function. Therefore, the input unit  222  receives the user&#39;s click, scroll, and key input signals to output the signals to the mouse control unit  223 . 
         [0051]    The position measuring unit  224  measures the motion of the wireless mouse  220  and outputs the position measuring signal to the mouse control unit  223 . 
         [0052]    The acoustic signal input/output unit  225  converts a digital audio signal input from the mouse control unit  223  to an analog signal and amplifies the analog signal to output the amplified analog signal to the speaker  402  connected to the acoustic signal input/output unit  225 . In addition, the acoustic signal input/output unit  225  converts an analog acoustic signal input from the microphone  401  connected to the acoustic signal input/output unit  225  to a digital signal to output the digital signal to the mouse control unit  223 . 
         [0053]    In  FIG. 4 , a separate speaker  402  and a separate microphone  401  are connected to the acoustic signal input/output unit  225 . Alternatively, the speaker  402  and the microphone  401  may be embedded inside an outer housing of the wireless mouse. 
         [0054]    The first memory unit  226  performs the same functions as a general external memory device. The first memory unit stores data that are to be used by the user such as user&#39;s authorized certificate, VoIP phone authentication, and other data. More specifically, under the control of the mouse control unit  223 , the first memory unit  226  performs functions of storing the data, reading out the stored data, and outputting the data to the mouse control unit  223 . The functions between the first memory unit  226  and the mouse control unit  223  are the same as those between the control unit of the USB memory device and the flash memory, and thus, detailed description thereof is omitted. 
         [0055]    The first extension unit  227  performs functions of connecting external electronic apparatuses to the mouse control unit  223  such as the functions of the one or more USB or IEEE 1394 ports. In the embodiment of the invention, the user connects the USB keyboard  404 , the USB mouse  403 , and the like to the first extension unit  227 , so that the user can use the additional mouse  403  together with the wireless mouse  220  according to the invention or the user can use the wireless mouse  220  and the keyboard  404  simultaneously. In addition, the user can connect an electronic apparatus such as a PMP and a PDA. 
         [0056]    In addition, the first transceiving unit  221  wirelessly communicates with the second transceiving unit  212  of the signal receiver  210  in a predetermined frequency band (in the embodiment of the invention, 2.4 GHz, 5.8 GHz, or the like) to transmit various signals input from the mouse control unit  223  to the second transceiving unit  212  of the signal receiver  210  and to receive the control signals and the data generated by the signal receiver  210  from the second transceiving unit  212  to output the signals and data to the mouse control unit  223 . 
         [0057]    The mouse control unit  223  controls the function of the aforementioned components. More specifically, the mouse control unit  223  receives the button, scroll, and key input signals input from the input unit  222  and the position measuring signal of the wireless mouse  220  input from the position measuring unit  224  to output the signals to the first transceiving unit  221 . 
         [0058]    In addition, the mouse control unit  223  outputs the digital audio signal that is received from the signal receiver  210  according to a predetermined protocol to the acoustic signal input/output unit  225 . The mouse control unit  223  outputs the digital audio signal through the speaker  402  to the user. The mouse control unit  223  receives the acoustic signal input through the microphone  401  from the acoustic signal input/output unit  225  to output the acoustic signal to the first transceiving unit  221  so that the acoustic signal is transmitted to the signal receiver  210  according to a predetermined protocol. In the embodiment of the invention, the transmission scheme for the audio data (sometimes, referred to as acoustic data) is the I2S protocol. However, it should be noted that the invention is not limited to a specific protocol. 
         [0059]    In addition, the mouse control unit  223  receives signals of the electronic apparatus such as the mouse  403  and the keyboard  404  connected to the first extension unit  227  to transmit the signals to the signal receiver  210 . The mouse control unit  223  receives the control signals of the electronic apparatus from the signal receiving unit to output the control signals through the first extension unit  227  to a connected electronic apparatus. 
         [0060]    In addition, the signal receiver  210  according to the second embodiment of the invention includes a multimedia broadcast receiving unit  211 , a second transceiving unit  212 , an interface unit  214 , a receiver control unit  213 , a second extension unit  215 , and a second memory unit  216 . 
         [0061]    Since the functions of the multimedia broadcast receiving unit  211 , the second transceiving unit  212 , and the interface unit  214  are the same as those of the aforementioned first embodiment, detailed description thereof is omitted. 
         [0062]    Similarly to the first memory unit  226 , the second memory unit  216  stores data that are to be used by the user, a driver program for driving the signal receiver  210  and the wireless mouse  220  according to the invention, a recorded broadcast received by the multimedia broadcast receiving unit  211 , and a screen obtained by capturing the broadcast. 
         [0063]    Similarly to the first extension unit  227 , the second extension unit  215  is implemented with one or more USB or IEEE 1394 ports to connect a USB memory device, a keyboard, a mouse, a PMP, a PDA, and other electronic apparatuses to the receiver control unit  213 . The connected electronic apparatuses can be controlled by the computer  230 . 
         [0064]    The receiver control unit  213  controls components of the signal receiver  210  and outputs the image signal and the acoustic signal input from the multimedia broadcast receiving unit  211  through the interface unit  214  to the computer  230  so that the signals can be displayed to the user. In addition, the receiver control unit  213  transmits the mouse signal input from the second transceiving unit  212  through the interface unit  214  to the computer  230 . 
         [0065]    In addition, if the receiver control unit  213  is connected through the interface unit  214  to the computer  230 , the receiver control unit  213  checks whether or not a driver program for using the multi-functional wireless mouse  220  is installed in the computer  230 . If not installed, the receiver control unit  213  loads a program stored in the second memory unit  216  to install the driver program in the computer  230 . 
         [0066]    In addition, the receiver control unit  213  records broadcast received through the multimedia broadcast receiving unit  211  to store the broadcast in the second memory unit  216 . The receiver control unit  213  may capture a specific screen to store the specific screen in the second memory unit  216 . 
         [0067]    Hereinbefore, the functions of the components of the wireless mouse  220  and the signal receiver  210  according to the invention are described. Now, the operations of the multi-functional wireless mouse apparatus will be described. 
         [0068]    Firstly, in the case where the user views multimedia broadcast, the multimedia broadcast receiving unit  211  receives broadcast signals and decodes the image signal and the audio signal (acoustic signal) to output the signals to the receiver control unit  213 . The receiver control unit  213  transmits these signals through the interface unit  214  to the computer  230 , so that the user can view the multimedia broadcast. 
         [0069]    At this time, in the case where the user is to record the multimedia broadcast that the user currently views, the user moves the wireless mouse  220  to click the record button displayed on the screen. The broadcast that is currently displayed to the user can be stored in the computer  230  according to user&#39;s selection or in the second memory unit  216 . 
         [0070]    In addition, in order to speedily and easily record/capture the multimedia broadcast, the user designates the recording/capturing functions to the dedicated key  222 - 2  provided to the wireless mouse  220  in advance. If the dedicated key  222 - 2  designated to the recording/capturing functions is pushed, the key input signal is output to the mouse control unit  223 . The mouse control unit  223  transmits the key input signal through the first transceiving unit  221  to the signal receiver  210 . The receiver control unit  213  receives the key input signal, and after that, the receiver control unit  213  stores the broadcast signal in the computer  230  or in the second memory unit  216 . 
         [0071]    In addition, the user pushes previously-defined volume key, channel select key, and the like during the viewing of the digital multimedia broadcast so as to easily adjust a volume of the broadcast or to easily change channel. 
         [0072]    In addition, in the case where a speaker is not provided to the computer  230 , the receiver control unit  213  outputs the image signal input from the multimedia broadcast receiving unit  211  to the computer  230  so that the image signal can be displayed to the user. In addition, the receiver control unit  213  transmits the acoustic signal to the wireless mouse  220  so that the acoustic signal can be output through the speaker  402  that is embedded in the wireless mouse  220  or connected to the acoustic signal input/output unit  225 . 
         [0073]    In addition, the user may connect the mouse  403  and the keyboard  404  to the first extension unit  227  of the wireless mouse  220 . In this case, the mouse control unit  223  receives the input signal input through the first extension unit  227  from the mouse  403  and the keyboard  404  to transmit the input signal to the signal receiver  210 . The signal receiver  210  outputs the keyboard signal and the mouse signal input from the wireless mouse  220  to the computer  230 . In this case, according to the settings, the wireless mouse  220  and the mouse  403  connected to the first extension unit  227  can be simultaneously operated, or only the mouse  403  connected to the first extension unit  227  may be operated. 
         [0074]    In addition, in the case where the user is to listen to a music through a headphone, the user connects the headphone to the acoustic signal input/output unit  225 . The acoustic signal played in the computer  230  is transmitted through the signal receiver  210  to the wireless mouse  220 . The mouse control unit  223  outputs the acoustic signal received according to the I2S protocol to the acoustic signal input/output unit  225 . The acoustic signal input/output unit  225  converts the digital signal to the analog signal to output the analog signal to the headphone speaker  402 . 
         [0075]    In addition, in the case where the user records the audio signal by using the microphone  401 , the analog acoustic signal is input from the acoustic signal input/output unit  225  through the microphone  401  connected to the acoustic signal input/output unit  225 . The analog acoustic signal is converted to the digital acoustic signal. Next, the digital acoustic signal is output to the mouse control unit  223 . The mouse control unit  223  transmits the input digital acoustic signal to the signal receiver  210 . The signal receiver  210  stores the received acoustic signal in the second memory unit  216 . Alternatively, the signal receiving unit  210  outputs the received acoustic signal to the computer  230  to store the signal therein. 
         [0076]    In addition, in order to move the data stored in user&#39;s external memory device to the computer  230  or to move a moving picture/music file stored in the computer  230  to user&#39;s portable multimedia player (PMP), the user connects the external memory device or the PMP to the second extension unit  215 . The receiver control unit  213  outputs the moving picture/music file received from the computer  230  to the PMP connected to the second extension unit  215  and stores the file. In addition, the receiver control unit  213  may output the data read out from the external memory device to the computer  230  and store the file. 
         [0077]    As described above, the multi-functional wireless mouse apparatus according to the invention can be implemented so as to perform various functions of the USB hub, the external memory device, and the like so that the digital multimedia broadcast receiver and a plurality of the electronic apparatuses can be connected thereto. 
         [0078]    While the invention has been particularly shown and described with reference to exemplary embodiments thereof, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims. The exemplary embodiments should be considered in descriptive sense only and not for purposes of limitation. Therefore, the scope of the invention is defined not by the detailed description of the invention but by the appended claims, and all differences within the scope will be construed as being included in the invention.