Abstract:
Disclosed is a radio modem terminal for mobile communication, comprising a main body having a functional unit for voice communication; a power supply unit hinged at one side of the main body; and a display unit disposed between the power supply unit and the main body, and also hinged with respect to the power supply unit and the main body to form a foldable type mobile communication device. When the radio modem terminal is not connected to a notebook computer, it can be used as a mobile communication terminal, using a power supply unit as its primary power source. However, if the radio modem terminal is connected to the notebook computer, it functions as the PC card, and uses power from the notebook computer as its primary source of power. Accordingly, the radio modem terminal is conveniently transported and used.

Description:
BACKGROUND OF THE INVENTION  
       [0001]     1. Field of the Invention  
         [0002]     The present invention relates to mobile communication and, more particularly, to a radio modem terminal for mobile.  
         [0003]     2. Background of the Related Art  
         [0004]     In general, a mobile communication terminal is a device allowing users to communicate with anyone, anywhere, at any time, and due to their convenience, use of mobile communication terminals is now wide spread and a number of diverse applications have been developed for their use.  
         [0005]     One such application is data communication. That is, by connecting a data port of the mobile communication terminal to a modem port of a notebook computer, access to various data communication and Internet services are made available to the user. The notebook computer has a variety of peripheral devices, such as an expansion memory, a data communication modem, LAN, or the like, which are connected to the notebook computer through a PCMCIA (Personal Computer Memory Card International Association) card or a PC card.  
         [0006]     The construction of the PCMCIA card or the PC card is based on standards established by a PCMCIA industrial group organized in 1989 to promote standards for memory and input/output integrated circuits. The 1993 PCMCIA 2.1 standards dictate a card size of 54 mm in width by 85.6 mm in length, and a 68 pin connector.  
         [0007]     The PC card can be classified into three types, depending on its thickness: TYPE 1 is mainly used for external memory expansion, and has a thickness of 3.3 mm; TYPE 2 is commonly used as a modem, LAN, a SCSI, or a sound card, and has a thickness of 5.0 mm; TYPE 3 is commonly used as an ATA (Advanced Technology Attachment) hard disk drive, and has a thickness of 10.5 mm.  
         [0008]      FIG. 1  illustrates how a notebook computer is connected to a communication network in accordance with the conventional art, which includes: a mobile communication terminal  10  with access to a mobile communication service while being transported; a notebook computer  20  implementing radio communication through the mobile communication terminal  10 ; and a connecting unit  30  connecting a data port installed in the mobile communication terminal  10  and the notebook computer  20  to enable data communication therebetween.  
         [0009]     The mobile communication terminal  10  is capable of receiving multimedia service as well as voice communication service and character information while being transported. In general, the mobile communication terminal includes a data port for data communication, through which the mobile communication terminal  10  can function as a speaker phone, update an operating program, and transmit and/or receive data.  
         [0010]     The notebook computer  20  is a portable personal computer, in which various kinds of modems can be built therein or attached thereto for data communication with an external device. The connecting unit  30  is a cable connecting the data port of the mobile communication terminal  10  and a modem of the notebook computer  20 , through which the mobile communication terminal  10  and the notebook computer  20  can conduct data communication with another computer or data unit, or conduct an Internet search using a mobile communication network.  
         [0011]     The conventional notebook computer, however, has a problem in that, since it is connected to the mobile communication terminal by a separate connecting unit, the connecting unit and the mobile phone must be separately fabricated, purchased, installed/uninstalled, and transported.  
         [0012]     Korean Patent Laid-Open Publication No. 2001-0082432 (dated Aug. 30, 2001) seeks a solution to this problem by inserting a PC card having a radio frequency unit, a CDMA processor, a memory, and an interface unit into a mobile communication terminal or into a notebook computer. More specifically, the PC card is inserted into an outer case of the mobile communication terminal for use as a mobile phone, whereas insertion of the PC card into the notebook computer enables radio data communication. Then, if a user wants to access the Internet with the notebook computer, he/she may withdraw the PC card from the mobile communication terminal and insert it into the corresponding notebook computer. The notebook computer automatically senses insertion of the PC card, and the user can then access the Internet through the notebook computer.  
         [0013]     However, because the PCMCIA TYPE 2 card is 54 mm wide by 85.6 mm long by 5 mm thick, based on the pertinent industrial standards, a problem arises in that it is difficult to mount the radio frequency unit, the CDMA processor, the memory, the interface unit, and other components on the face of the PC card. Additionally, the PC card does not function by itself, and needs a dedicated terminal case for its use, causing inconvenience in that the dedicated terminal case must also be transported.  
         [0014]     The above references are incorporated by reference herein where appropriate for appropriate teachings of additional or alternative details, features and/or technical background.  
       SUMMARY OF THE INVENTION  
       [0015]     An object of the invention is to solve at least the above problems and/or disadvantages and to provide at least the advantages described hereinafter.  
         [0016]     Therefore, an object of the present invention is to provide a radio modem terminal for mobile communication which can use an easily foldable display unit. An object of the present invention is to provide a radio modem terminal for mobile communication which can use an easily foldable power supply unit. An object of the invention is to provide a radio modem terminal for mobile communication which can use includes a PC card having a function of a mobile phone.  
         [0017]     An object of the present invention is to provide a radio modem terminal for mobile communication that can be mounted at a notebook computer by having in a PC card a switch for selecting charging/discharging of a power supply unit.  
         [0018]     To achieve at least the above objects in whole or in parts, there is provided a radio modem terminal for a mobile communication including: a main body having a functional unit for voice communication; a power supply unit hinged at one side of the main body forming a foldable type device; and a display unit hinged at one side of the main body and positioned between the power supply unit and the main body.  
         [0019]     To achieve at least these advantages in whole or in parts, there is further provided a radio modem terminal for a mobile communication including: an RF unit for processing an RF input signal; a user interface for interfacing a signal transmitted to and received from a display unit; a memory unit storing various data for operating a radio modem terminal for a mobile communication; an audio interface unit for processing a voice signal; a PCMCIA interface unit for interfacing a signal transmitted and received through the user interface unit on the basis of the PCMCIA standard; a controller for monitoring a signal transmitted and received between functional units and controlling a corresponding operation; and a connector for transmitting to and receiving from a notebook computer by being connected thereto.  
         [0020]     The present invention can be achieved in whole or in part by a radio modem terminal for mobile communication, including, a main body comprising a functional unit configured to provide voice communication capability, a power supply unit, wherein one side of the power supply unit is configured to be rotatably connected to one side of the main body, and a display unit, wherein one side of the display unit is configured to be rotatably connected to the one side of the main body, and wherein the display unit is positioned between the power supply unit and the main body.  
         [0021]     The present invention can be further achieved in whole or in part by a radio modem terminal for a mobile communication, including, an RF unit configured to process an RF input signal, a user interface configured to interface a signal transmitted to and received from a display unit, a memory unit configured to store operating data, an audio interface unit configured to process a voice signal, a PCMCIA interface unit configured to interface a signal transmitted and received through the user interface unit based on the PCMCIA standard, a controller configured to monitor a signal transmitted and received between functional units of the radio modem terminal and to control a corresponding operation, and a connector configured to connect the radio modem terminal to a notebook computer, wherein the connector is further configured to transmit a plurality of signals to and receive a plurality of signals from the notebook computer when they are connected.  
         [0022]     The present invention can be further achieved in whole or in part by a radio modem terminal for mobile communication, including, a main body, comprising a PC card, a power supply unit rotatably connected to the main body, and a display unit rotatably connected to the main body and the power supply unit.  
         [0023]     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 objects and advantages of the invention may be realized and attained as particularly pointed out in the appended claims. 
     
    
     BRIEF DESCRIPTION OF THE DRAWINGS  
       [0024]     The invention will be described in detail with reference to the following drawings in which like reference numerals refer to like elements wherein:  
         [0025]      FIG. 1  illustrates how data of a notebook computer is transmitted and received in accordance with the conventional art;  
         [0026]      FIG. 2  illustrates an external construction of a radio modem terminal for mobile communication in accordance with an embodiment of the present invention;  
         [0027]      FIG. 3  is a block diagram of the inner construction of the radio modem terminal for mobile communication in accordance with an embodiment of the present invention; and  
         [0028]      FIG. 4  is a schematic view of a switch of the radio modem terminal for mobile communication in accordance with an embodiment of the present invention. 
     
    
     DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS  
       [0029]     As shown in  FIG. 2 , a radio modem terminal for mobile communication of the present invention includes: a PC card  100 , a display unit  200  hinged at one side of the PC card  100 ; and a power supply unit  300  hinged at the part where the PC card  100  and the display unit  200  are coupled.  
         [0030]     The PC card  100  is 54 mm wide by 85.6 mm long by 5 mm thick, as required for a standard TYPE 2 PC card, and the various functional parts required by a mobile communication terminal are included in the PC card  100 , the PC card with the function parts mounted thereon constituting a main body  500 .  
         [0031]     The display unit  200  and the power supply unit  300  are attached at one side of the main body  500 . The display unit  200  and the power supply unit  300  are rotated by a hinge at the other end of the PC card  100 , and are opened or closed by the user as necessary.  
         [0032]     The display unit  200  is formed as a touch pad so that it can perform an input/output function without a keypad. A connector  170  is provided at one side of the main body  500  for connection with other peripheral devices. The connector  170  has 68 pins as defined by the PC card standard.  
         [0033]     In order for the mobile communication terminal using the PC card  100  to be connected to a data processing unit such as the notebook computer  400  to conduct radio communication, the notebook computer  400  includes a socket  410  that is able to accommodate the 68 pin connector  170 .  
         [0034]      FIG. 3  is a block diagram of the inner construction of the radio modem terminal for mobile communication in accordance with an embodiment of the present invention, in which the radio modem terminal for mobile communication and the notebook computer  400  are connected to each other.  
         [0035]     As shown in  FIG. 3 , the radio modem terminal comprises: a controller  110  for monitoring and controlling each functional unit of the radio modem terminal; an RF (Radio Frequency) unit  120  for processing a transmission and reception radio frequency signal; a display unit  200  for inputting and displaying information based on user selection; a user interface unit  130  for interfacing information inputted through the display unit  200 ; a memory unit  140  for storing various programs and data for operating the mobile communication terminal; an audio interface unit  150  for processing a voice signal to enable voice communication; a PCMCIA interface unit  160  connected to the user interface unit  130  and interfacing an inputted signal to a signal based on the PCMCIA standard; a connector  170  connected to the notebook computer  400  to transmit and receive a signal of the PCMCIA interface unit  160  to and from an external device; and a power supply unit  300  for supplying power to the radio modem terminal.  
         [0036]     The notebook computer  400  includes: a socket  410  for connecting the connector  170  of the main body  500  to the notebook computer  400 ; a notebook interface unit  420  for interfacing with the socket  410  and transmitting and receiving signals through the socket  410 ; a notebook power supply unit  430  for supplying operating power to the radio modem terminal through the socket  410  and supplying operating power to the notebook computer  400 ; and a charging unit  440  for charging the power supply unit  300  connected to the radio modem terminal through the socket  410 .  
         [0037]     If the radio modem terminal is connected to the notebook computer  400 , the controller  110  controls the radio modem terminal such that the radio modem terminal is operated as a radio modem, whereas if the radio modem terminal transmits and receives a voice signal through the audio interface  150 , the controller  110  controls the radio modem terminal such that the radio modem terminal is operated as a mobile communication terminal.  
         [0038]     The display unit  200  can be constructed as a liquid crystal display (LCD), and preferably includes a touch pad. The user interface  130  receives a dial signal, a search signal, or transmission and reception control signal that is input by the user through the display unit  200 , transmits the signal to the controller  110 , and displays an operation state of the radio modem terminal on the display unit  200 .  
         [0039]     The memory unit  140  stores programs or data required for the controller  110  to control each functional unit of the radio modem terminal, and activates and outputs stored programs or data based on a request from the controller  110 .  
         [0040]     If the radio modem terminal is used as a mobile communication terminal, the audio interface unit  150  processes a transmitted and received voice signal.  
         [0041]     The PCMCIA interface unit  160  is required if the radio modem terminal is used as a radio modem. In this case, the PCMCIA interface unit  160  is connected to the controller  110  through the user interface unit  130 .  
         [0042]     The PCMCIA interface unit  160  processes a data communication signal based on the PCMCIA standard and transmits the signal to the notebook computer  400  through the connector  170 . At this time, the connector  170  is connected to the socket  410  of the notebook computer  400 .  
         [0043]     The socket  410  of the notebook computer  400  transmits a signal applied through the connector  170  of the radio modem terminal to the notebook interface unit  410 . The socket  410  also transmits various signals generated by the notebook computer  400  to the radio modem terminal through the connector  170 .  
         [0044]     The notebook power supply unit  430  supplies basic power to operate each functional part of the notebook computer  400 . The power supply unit  430  also supplies power to the radio modem terminal when the socket  410  and the connector  170  are connected.  
         [0045]     The charging unit  440  charges the power supply unit  300  of the radio modem terminal for mobile communication, while the notebook power supply unit  430  supplies power to the radio modem terminal while the notebook computer  400  and the radio modem terminal are connected. At this time, the notebook power supply unit  430  and the charging unit  440  are connected to the pins of the socket  410 , and the pins of the socket  410  are connected to corresponding pins of the connector  170 .  
         [0046]      FIG. 4  is a detailed view of a switch of the radio modem terminal for mobile communication in accordance with an embodiment of the present invention.  
         [0047]     As shown in  FIG. 4 , the radio modem terminal for mobile communication includes a switch  180  for connecting the connector  170  and the power supply unit  300 . The switch  180  operates by automatically sensing a connection between the radio modem terminal and the notebook computer  400 .  
         [0048]     That is, when the radio modem terminal and the notebook computer  400  are connected, terminals ‘a’ and ‘b’ of the switch  180  are connected. When sensing this connection, the switch  180  supplies operating power from the notebook power supply unit  430  to the radio modem terminal. It also supplies power from the charging unit  440  to the power supply unit  300  in order to charge it.  
         [0049]     If, however, the radio modem terminal is not connected to the notebook computer  400 , the terminals ‘a’ and ‘c’ of the switch  180  are connected, causing the notebook power supply unit  430  to be shorted. Operating power outputted from the power supply unit  300  is then supplied to each functional part of the radio modem terminal, and accordingly, the radio modem terminal operates as a mobile communication terminal.  
         [0050]     The operation of the radio modem terminal will now be described in detail. The display unit  200  and the power supply unit  300  of the radio modem terminal are opened from the PC card  100 , and the connector  170  of the PC card  100  is installed in the socket  410  of the notebook computer  400 . As the terminals ‘a’ and ‘b’ are connected in the switch  180  of the radio modem terminal, the radio modem terminal would use power supplied by the notebook computer  400  as its operating power, and would operate in the PC card mode according to the user&#39;s manipulation.  
         [0051]     When the radio modem terminal is intended to be used as a mobile communication terminal, the display unit  200  is opened and the touch pad is manipulated just like a typical foldable type mobile communication device. Then, the radio modem terminal senses a non-connection of the socket  410  of the notebook computer  400  to the connector  170 , and accordingly, it is switched to the mobile communication terminal mode and uses power supplied by the power supply unit  300  for its operating power.  
         [0052]     The radio modem terminal can be also used as a mobile communication terminal in the PC card mode. That is, while the radio modem terminal is not performing a radio data communication, the user may initiate voice communication by using the display unit  200  and a mobile communication terminal headset (not shown).  
         [0053]     As so far described, the radio modem terminal for mobile communication has an advantage in that, by integrating the mobile communication terminal and the PC card into one body, the user does not need to carry a PC card separate from the mobile communication terminal. Accordingly, this approach is not only economical but also more convenient when being transported and used.  
         [0054]     The foregoing embodiments and advantages are merely exemplary and are not to be construed as limiting the present invention. The present teaching can be readily applied to other types of apparatuses. The description of the present invention is intended to be illustrative, and not to limit the scope of the claims. Many alternatives, modifications, and variations will be apparent to those skilled in the art. In the claims, means-plus-function clauses are intended to cover the structures described herein as performing the recited function and not only structural equivalents but also equivalent structures.