Abstract:
In an electronic device system, a computer is connected to a port replicator connectable to an extended input device and extended liquid crystal display device. The system enables the notebook computer to be easily detached even when the system is installed in a vehicle. Accordingly, information stored in the computer is easily retrievable when any problem occurs to the vehicle where the system is installed.

Description:
FIELD OF THE INVENTION  
         [0001]    The present invention relates to an electronic device system including a notebook computer, a port replicator, an extended input device, and an extended liquid crystal display device.  
         BACKGROUND OF THE INVENTION  
         [0002]    A conventional electronic device system includes a desktop computer, an extended input device, and an extended liquid crystal display device.  
           [0003]    [0003]FIG. 4 shows the conventional electronic device system. The system includes desktop computer  21 , extended input device  22 , liquid crystal display  23 , signal cable  24  for transmitting signals between desktop computer  21  and extended input device  22 , and signal cable  25  for transmitting video signals from desktop computer  21  to liquid crystal display  23 .  
           [0004]    If the conventional electronic device system is installed in a vehicle, such as a police car, desktop computer  21  is physically attached to the vehicle. Accordingly, if any problem occurs with the vehicle, or if anyone requires operating the system in an office, information stored in desktop computer  21  is not easily retrievable. In the worst case, information may be lost.  
         SUMMARY OF THE INVENTION  
         [0005]    An electronic device system includes: a computer having a display unit, an input unit, and an extension terminal; a port replicator which can be connected to the extension terminal and has plural input/output (I/O) terminals; an input device which has a first key having substantially a key alignment identical to the input unit; a display device which displays a screen identical to the display unit and has a second key having the same function as the first key; a first cable for transmitting signals between the port replicator and input device; a second cable for transmitting signals between the port replicator and the liquid crystal display device; and a third cable for transmitting signals between the input device and the liquid crystal display device.  
           [0006]    Since the computer is detachable from the electronic device system, important information is protected, and user&#39;s operation efficiency improves. 
       
    
    
     BRIEF DESCRIPTION OF THE DRAWINGS  
       [0007]    [0007]FIG. 1 is a perspective of an electronic device system in accordance with exemplary embodiment 1 of the present invention.  
         [0008]    [0008]FIG. 2 is a perspective of an electronic device system in accordance with exemplary embodiment 2 of the invention.  
         [0009]    [0009]FIG. 3 is a perspective of an electronic device system in accordance with exemplary embodiment 3 of the invention.  
         [0010]    [0010]FIG. 4 is a perspective of a conventional electronic device system. 
     
    
     DESCRIPTION OF THE PREFERRED EMBODIMENT  
     Embodiment 1  
       [0011]    [0011]FIG. 1 is a perspective of an electronic device system according to exemplary embodiment  1  of the present invention. Notebook computer  1  includes liquid crystal display (LCD) unit  1   a  and input unit  1   b . Port replicator  2  is connectable to an extension terminal (not illustrated) mounted to notebook computer  1 , and has plural input/output (I/O) terminals. Extended input device  3  has a key alignment substantially identocal to notebook computer  1 . Extended LCD device  4  includes LCD unit  4   a  for displaying a screen identical to notebook computer  1  and plural function keys  4   b  which have the same functions as plural function keys  3   a  in extended input device  3 . Signal cable  5  transmits signals between port replicator  2  and extended input device  3 . Signal cable  6  transmits signals between port replicator  2  and extended LCD device  4 . Signal cable  7  transmits signals between extended input device  3  and extended LCD device  4 .  
         [0012]    If the electronic device system as configured above is installed in a vehicle, such as a police car, (installation means to the vehicle not illustrated), information in computer  1  can be secured even if an accident occurs to the vehicle because notebook computer  1  is immediately detachable.  
         [0013]    If a user needs to operate individually or if the user needs to work at his/her desk after completing operations in the vehicle, notebook computer  1  is easily detachable from the vehicle for continuing the work at the desk.  
         [0014]    Moreover, if the vehicle is stolen, information in computer  1  is hardly stolen together because computer  1  is detachable from the vehicle, and this improves risk management and security of information.  
         [0015]    Extended LCD device  4  has frequently-used function keys  4   b  independently. This allows the user to view the screen and press function keys  4   b  near the screen. The user does not need to move their eyes to function keys  3   a  on extended input device  3 . This eliminates unnecessary eye movement while driving the vehicle, thus improving both safety and ease of operation.  
         [0016]    Each key on extended input device  3  may be designed to emit light independently using light-emitting materials, and an area of the input keys is visible during night patrols.  
       Embodiment 2  
       [0017]    [0017]FIG. 2 is a perspective view of an electronic device system according to exemplary embodiment 2 of the present invention. Elements in FIG. 2 which are the same as those in embodiment 1 are denoted by the same numerals to omit their descriptions. Video distributor  8  outputs the same screen signals as for liquid crystal display (LCD) unit la in notebook computer  1 . Second extended LCD device  9  displays the same screen as notebook computer  1 . Signal cable  10  transmits signals between port replicator  2  and video distributor  8 . Signal cable  11  transmits signals between video distributor  8  and extended LCD unit  4 . Signal cable  12  transmits signals between video distributor  8  and extended LCD device  9 .  
         [0018]    If First Aid needs to be provided to an emergency patient, the same information needs to be confirmed simultaneously at a driver seat and at a First Aid area which is away from the driver seat. If the electronic device system as configured above is installed in a vehicle, such as an ambulance, (installation means to the vehicle not illustrated), the same screen is displayed simultaneously on two extended LCD devices. Accordingly, information can be confirmed at different areas in the vehicle.  
       Embodiment 3  
       [0019]    [0019]FIG. 3 is a perspective of an electronic device system according to exemplary embodiment 3 of the present invention. Elements in FIG. 3 which are the same as those in the first exemplary embodiment are denoted by the same numerals to omit their descriptions. Touch screen  1   c  is mounted on liquid crystal display (LCD) unit la in notebook computer  1 , and is pressed to input signals. Touch screen  4   c  is mounted on extended LCD device  4 , and is pressed to input signals. Signal cable  13  transmits signals between port replicator  2  and extended LCD device  4 .  
         [0020]    The electronic device system as configured above enables a user to input information on a screen of LCD unit  3 . Accordingly, most operations are executable on LCD unit  3 , thus improving operational efficiency.  
         [0021]    LCD unit  1   a  of notebook computer  1  in the electronic device system according to embodiments 1 to 3 is closed. However, notebook computer  1  is turned on and activated upon power switch  4   d  of extended LCD device  4  being turned on. In addition, extended input device  3  is operable upon power switch  4   d  being turned on. Accordingly, notebook computer  1  may not be turned on directly, and extended LCD device  4  may not be turned on again.